/* DWARF 2 debugging format support for GDB.
Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
- 2004, 2005, 2006, 2007, 2008, 2009, 2010
+ 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
Free Software Foundation, Inc.
Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
#include "typeprint.h"
#include "jv-lang.h"
#include "psympriv.h"
+#include "exceptions.h"
+#include "gdb_stat.h"
+#include "completer.h"
+#include "vec.h"
+#include "c-lang.h"
+#include "valprint.h"
#include <fcntl.h>
#include "gdb_string.h"
#endif
#endif
+typedef struct symbol *symbolp;
+DEF_VEC_P (symbolp);
+
#if 0
/* .debug_info header for a compilation unit
Because of alignment constraints, this structure has padding and cannot
int readin;
};
+/* All offsets in the index are of this type. It must be
+ architecture-independent. */
+typedef uint32_t offset_type;
+
+DEF_VEC_I (offset_type);
+
+/* A description of the mapped index. The file format is described in
+ a comment by the code that writes the index. */
+struct mapped_index
+{
+ /* The total length of the buffer. */
+ off_t total_size;
+ /* A pointer to the address table data. */
+ const gdb_byte *address_table;
+ /* Size of the address table data in bytes. */
+ offset_type address_table_size;
+ /* The symbol table, implemented as a hash table. */
+ const offset_type *symbol_table;
+ /* Size in slots, each slot is 2 offset_types. */
+ offset_type symbol_table_slots;
+ /* A pointer to the constant pool. */
+ const char *constant_pool;
+};
+
struct dwarf2_per_objfile
{
struct dwarf2_section_info info;
struct dwarf2_section_info types;
struct dwarf2_section_info frame;
struct dwarf2_section_info eh_frame;
+ struct dwarf2_section_info gdb_index;
/* Back link. */
struct objfile *objfile;
/* The number of compilation units in ALL_COMP_UNITS. */
int n_comp_units;
+ /* The number of .debug_types-related CUs. */
+ int n_type_comp_units;
+
+ /* The .debug_types-related CUs. */
+ struct dwarf2_per_cu_data **type_comp_units;
+
/* A chain of compilation units that are currently read in, so that
they can be freed later. */
struct dwarf2_per_cu_data *read_in_chain;
/* A flag indicating wether this objfile has a section loaded at a
VMA of 0. */
int has_section_at_zero;
+
+ /* True if we are using the mapped index,
+ or we are faking it for OBJF_READNOW's sake. */
+ unsigned char using_index;
+
+ /* The mapped index, or NULL if .gdb_index is missing or not being used. */
+ struct mapped_index *index_table;
+
+ /* When using index_table, this keeps track of all quick_file_names entries.
+ TUs can share line table entries with CUs or other TUs, and there can be
+ a lot more TUs than unique line tables, so we maintain a separate table
+ of all line table entries to support the sharing. */
+ htab_t quick_file_names_table;
+
+ /* Set during partial symbol reading, to prevent queueing of full
+ symbols. */
+ int reading_partial_symbols;
+
+ /* Table mapping type .debug_info DIE offsets to types.
+ This is NULL if not allocated yet.
+ It (currently) makes sense to allocate debug_types_type_hash lazily.
+ To keep things simple we allocate both lazily. */
+ htab_t debug_info_type_hash;
+
+ /* Table mapping type .debug_types DIE offsets to types.
+ This is NULL if not allocated yet. */
+ htab_t debug_types_type_hash;
};
static struct dwarf2_per_objfile *dwarf2_per_objfile;
#define TYPES_SECTION "debug_types"
#define FRAME_SECTION "debug_frame"
#define EH_FRAME_SECTION "eh_frame"
+#define GDB_INDEX_SECTION "gdb_index"
/* local data types */
-/* We hold several abbreviation tables in memory at the same time. */
+/* We hold several abbreviation tables in memory at the same time. */
#ifndef ABBREV_HASH_SIZE
#define ABBREV_HASH_SIZE 121
#endif
unsigned int first_die_offset;
};
+/* Type used for delaying computation of method physnames.
+ See comments for compute_delayed_physnames. */
+struct delayed_method_info
+{
+ /* The type to which the method is attached, i.e., its parent class. */
+ struct type *type;
+
+ /* The index of the method in the type's function fieldlists. */
+ int fnfield_index;
+
+ /* The index of the method in the fieldlist. */
+ int index;
+
+ /* The name of the DIE. */
+ const char *name;
+
+ /* The DIE associated with this method. */
+ struct die_info *die;
+};
+
+typedef struct delayed_method_info delayed_method_info;
+DEF_VEC_O (delayed_method_info);
+
/* Internal state when decoding a particular compilation unit. */
struct dwarf2_cu
{
/* Backchain to our per_cu entry if the tree has been built. */
struct dwarf2_per_cu_data *per_cu;
- /* Pointer to the die -> type map. Although it is stored
- permanently in per_cu, we copy it here to avoid double
- indirection. */
- htab_t type_hash;
-
/* How many compilation units ago was this CU last referenced? */
int last_used;
/* Header data from the line table, during full symbol processing. */
struct line_header *line_header;
+ /* A list of methods which need to have physnames computed
+ after all type information has been read. */
+ VEC (delayed_method_info) *method_list;
+
/* Mark used when releasing cached dies. */
unsigned int mark : 1;
of the CU cache it gets reset to NULL again. */
struct dwarf2_cu *cu;
- /* If full symbols for this CU have been read in, then this field
- holds a map of DIE offsets to types. It isn't always possible
- to reconstruct this information later, so we have to preserve
- it. */
- htab_t type_hash;
+ /* The corresponding objfile. */
+ struct objfile *objfile;
- /* The partial symbol table associated with this compilation unit,
- or NULL for partial units (which do not have an associated
- symtab). */
- struct partial_symtab *psymtab;
+ /* When using partial symbol tables, the 'psymtab' field is active.
+ Otherwise the 'quick' field is active. */
+ union
+ {
+ /* The partial symbol table associated with this compilation unit,
+ or NULL for partial units (which do not have an associated
+ symtab). */
+ struct partial_symtab *psymtab;
+
+ /* Data needed by the "quick" functions. */
+ struct dwarf2_per_cu_quick_data *quick;
+ } v;
};
/* Entry in the signatured_types hash table. */
struct dwarf2_per_cu_data per_cu;
};
-/* Struct used to pass misc. parameters to read_die_and_children, et. al.
- which are used for both .debug_info and .debug_types dies.
- All parameters here are unchanging for the life of the call.
- This struct exists to abstract away the constant parameters of
- die reading. */
+/* Struct used to pass misc. parameters to read_die_and_children, et
+ al. which are used for both .debug_info and .debug_types dies.
+ All parameters here are unchanging for the life of the call. This
+ struct exists to abstract away the constant parameters of die
+ reading. */
struct die_reader_specs
{
};
/* When we construct a partial symbol table entry we only
- need this much information. */
+ need this much information. */
struct partial_die_info
{
/* Offset of this DIE. */
/* Flag set if the DIE has a byte_size attribute. */
unsigned int has_byte_size : 1;
+ /* Flag set if any of the DIE's children are template arguments. */
+ unsigned int has_template_arguments : 1;
+
+ /* Flag set if fixup_partial_die has been called on this die. */
+ unsigned int fixup_called : 1;
+
/* The name of this DIE. Normally the value of DW_AT_name, but
sometimes a default name for unnamed DIEs. */
char *name;
+ /* The linkage name, if present. */
+ const char *linkage_name;
+
/* The scope to prepend to our children. This is generally
allocated on the comp_unit_obstack, so will disappear
when this compilation unit leaves the cache. */
/* Pointer into the info_buffer (or types_buffer) pointing at the target of
DW_AT_sibling, if any. */
+ /* NOTE: This member isn't strictly necessary, read_partial_die could
+ return DW_AT_sibling values to its caller load_partial_dies. */
gdb_byte *sibling;
/* If HAS_SPECIFICATION, the offset of the DIE referred to by
struct partial_die_info *die_parent, *die_child, *die_sibling;
};
-/* This data structure holds the information of an abbrev. */
+/* This data structure holds the information of an abbrev. */
struct abbrev_info
{
unsigned int number; /* number identifying abbrev */
ENUM_BITFIELD(dwarf_form) form : 16;
};
-/* Attributes have a name and a value */
+/* Attributes have a name and a value. */
struct attribute
{
ENUM_BITFIELD(dwarf_attribute) name : 16;
u;
};
-/* This data structure holds a complete die structure. */
+/* This data structure holds a complete die structure. */
struct die_info
{
/* DWARF-2 tag for this DIE. */
ENUM_BITFIELD(dwarf_tag) tag : 16;
/* Number of attributes */
- unsigned short num_attrs;
+ unsigned char num_attrs;
+
+ /* True if we're presently building the full type name for the
+ type derived from this DIE. */
+ unsigned char building_fullname : 1;
/* Abbrev number */
unsigned int abbrev;
/* The dies in a compilation unit form an n-ary tree. PARENT
points to this die's parent; CHILD points to the first child of
this node; and all the children of a given node are chained
- together via their SIBLING fields, terminated by a die whose
- tag is zero. */
+ together via their SIBLING fields. */
struct die_info *child; /* Its first child, if any. */
struct die_info *sibling; /* Its next sibling, if any. */
struct die_info *parent; /* Its parent, if any. */
struct function_range *next;
};
-/* Get at parts of an attribute structure */
+/* Get at parts of an attribute structure. */
#define DW_STRING(attr) ((attr)->u.str)
#define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
#define DW_ADDR(attr) ((attr)->u.addr)
#define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
-/* Blocks are a bunch of untyped bytes. */
+/* Blocks are a bunch of untyped bytes. */
struct dwarf_block
{
unsigned int size;
in an instance of a field_info structure, as defined below. */
struct field_info
{
- /* List of data member and baseclasses fields. */
+ /* List of data member and baseclasses fields. */
struct nextfield
{
struct nextfield *next;
show_dwarf2_max_cache_age (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
- fprintf_filtered (file, _("\
-The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
+ fprintf_filtered (file, _("The upper bound on the age of cached "
+ "dwarf2 compilation units is %s.\n"),
value);
}
-/* Various complaints about symbol reading that don't abort the process */
+/* Various complaints about symbol reading that don't abort the process. */
static void
dwarf2_statement_list_fits_in_line_number_section_complaint (void)
dwarf2_debug_line_missing_end_sequence_complaint (void)
{
complaint (&symfile_complaints,
- _(".debug_line section has line program sequence without an end"));
+ _(".debug_line section has line "
+ "program sequence without an end"));
}
static void
int arg3)
{
complaint (&symfile_complaints,
- _("const value length mismatch for '%s', got %d, expected %d"), arg1,
- arg2, arg3);
+ _("const value length mismatch for '%s', got %d, expected %d"),
+ arg1, arg2, arg3);
}
static void
dwarf2_macro_malformed_definition_complaint (const char *arg1)
{
complaint (&symfile_complaints,
- _("macro debug info contains a malformed macro definition:\n`%s'"),
+ _("macro debug info contains a "
+ "malformed macro definition:\n`%s'"),
arg1);
}
dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
{
complaint (&symfile_complaints,
- _("invalid attribute class or form for '%s' in '%s'"), arg1, arg2);
+ _("invalid attribute class or form for '%s' in '%s'"),
+ arg1, arg2);
}
/* local function prototypes */
static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
struct objfile *);
-static void dwarf2_build_include_psymtabs (struct dwarf2_cu *,
- struct die_info *,
- struct partial_symtab *);
-
static void dwarf2_build_psymtabs_hard (struct objfile *);
static void scan_partial_symbols (struct partial_die_info *,
static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int);
-static char *read_string (bfd *, gdb_byte *, unsigned int *);
+static char *read_direct_string (bfd *, gdb_byte *, unsigned int *);
static char *read_indirect_string (bfd *, gdb_byte *,
const struct comp_unit_head *,
(unsigned int offset,
bfd *abfd, struct dwarf2_cu *cu));
-static void dwarf_decode_lines (struct line_header *, char *, bfd *,
+static void dwarf_decode_lines (struct line_header *, const char *, bfd *,
struct dwarf2_cu *, struct partial_symtab *);
-static void dwarf2_start_subfile (char *, char *, char *);
+static void dwarf2_start_subfile (char *, const char *, const char *);
static struct symbol *new_symbol (struct die_info *, struct type *,
struct dwarf2_cu *);
+static struct symbol *new_symbol_full (struct die_info *, struct type *,
+ struct dwarf2_cu *, struct symbol *);
+
static void dwarf2_const_value (struct attribute *, struct symbol *,
struct dwarf2_cu *);
-static void dwarf2_const_value_data (struct attribute *attr,
- struct symbol *sym,
- int bits);
+static void dwarf2_const_value_attr (struct attribute *attr,
+ struct type *type,
+ const char *name,
+ struct obstack *obstack,
+ struct dwarf2_cu *cu, long *value,
+ gdb_byte **bytes,
+ struct dwarf2_locexpr_baton **baton);
static struct type *die_type (struct die_info *, struct dwarf2_cu *);
static int need_gnat_info (struct dwarf2_cu *);
-static struct type *die_descriptive_type (struct die_info *, struct dwarf2_cu *);
+static struct type *die_descriptive_type (struct die_info *,
+ struct dwarf2_cu *);
static void set_descriptive_type (struct type *, struct die_info *,
struct dwarf2_cu *);
static struct type *die_containing_type (struct die_info *,
struct dwarf2_cu *);
-static struct type *tag_type_to_type (struct die_info *, struct dwarf2_cu *);
+static struct type *lookup_die_type (struct die_info *, struct attribute *,
+ struct dwarf2_cu *);
static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
+static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *);
+
static char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
static char *typename_concat (struct obstack *obs, const char *prefix,
struct dwarf2_cu *);
static void dwarf2_attach_fn_fields_to_type (struct field_info *,
- struct type *, struct dwarf2_cu *);
+ struct type *,
+ struct dwarf2_cu *);
static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
+static const char *dwarf2_full_name (char *name,
+ struct die_info *die,
+ struct dwarf2_cu *cu);
+
static struct die_info *dwarf2_extension (struct die_info *die,
struct dwarf2_cu **);
static int attr_form_is_constant (struct attribute *);
+static void fill_in_loclist_baton (struct dwarf2_cu *cu,
+ struct dwarf2_loclist_baton *baton,
+ struct attribute *attr);
+
static void dwarf2_symbol_mark_computed (struct attribute *attr,
struct symbol *sym,
struct dwarf2_cu *cu);
static struct dwarf2_per_cu_data *dwarf2_find_comp_unit
(unsigned int offset, struct objfile *objfile);
-static struct dwarf2_cu *alloc_one_comp_unit (struct objfile *objfile);
+static void init_one_comp_unit (struct dwarf2_cu *cu,
+ struct objfile *objfile);
+
+static void prepare_one_comp_unit (struct dwarf2_cu *cu,
+ struct die_info *comp_unit_die);
static void free_one_comp_unit (void *);
static void create_all_comp_units (struct objfile *);
+static int create_debug_types_hash_table (struct objfile *objfile);
+
static void load_full_comp_unit (struct dwarf2_per_cu_data *,
struct objfile *);
static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
+static struct type *get_die_type_at_offset (unsigned int,
+ struct dwarf2_per_cu_data *per_cu);
+
static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu);
+static void dwarf2_release_queue (void *dummy);
+
+static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu,
+ struct objfile *objfile);
+
+static void process_queue (struct objfile *objfile);
+
+static void find_file_and_directory (struct die_info *die,
+ struct dwarf2_cu *cu,
+ char **name, char **comp_dir);
+
+static char *file_full_name (int file, struct line_header *lh,
+ const char *comp_dir);
+
+static gdb_byte *partial_read_comp_unit_head (struct comp_unit_head *header,
+ gdb_byte *info_ptr,
+ gdb_byte *buffer,
+ unsigned int buffer_size,
+ bfd *abfd);
+
+static void init_cu_die_reader (struct die_reader_specs *reader,
+ struct dwarf2_cu *cu);
+
+static htab_t allocate_signatured_type_table (struct objfile *objfile);
+
+#if WORDS_BIGENDIAN
+
+/* Convert VALUE between big- and little-endian. */
+static offset_type
+byte_swap (offset_type value)
+{
+ offset_type result;
+
+ result = (value & 0xff) << 24;
+ result |= (value & 0xff00) << 8;
+ result |= (value & 0xff0000) >> 8;
+ result |= (value & 0xff000000) >> 24;
+ return result;
+}
+
+#define MAYBE_SWAP(V) byte_swap (V)
+
+#else
+#define MAYBE_SWAP(V) (V)
+#endif /* WORDS_BIGENDIAN */
+
+/* The suffix for an index file. */
+#define INDEX_SUFFIX ".gdb-index"
+
+static const char *dwarf2_physname (char *name, struct die_info *die,
+ struct dwarf2_cu *cu);
+
/* Try to locate the sections we need for DWARF 2 debugging
information and return true if we have enough to do something. */
dwarf2_per_objfile->types.asection = sectp;
dwarf2_per_objfile->types.size = bfd_get_section_size (sectp);
}
+ else if (section_is_p (sectp->name, GDB_INDEX_SECTION))
+ {
+ dwarf2_per_objfile->gdb_index.asection = sectp;
+ dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp);
+ }
if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
&& bfd_section_vma (abfd, sectp) == 0)
int header_size = 12;
if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
- || bfd_bread (compressed_buffer, compressed_size, abfd) != compressed_size)
+ || bfd_bread (compressed_buffer,
+ compressed_size, abfd) != compressed_size)
error (_("Dwarf Error: Can't read DWARF data from '%s'"),
bfd_get_filename (abfd));
#endif
}
+/* A helper function that decides whether a section is empty. */
+
+static int
+dwarf2_section_empty_p (struct dwarf2_section_info *info)
+{
+ return info->asection == NULL || info->size == 0;
+}
+
/* Read the contents of the section SECTP from object file specified by
OBJFILE, store info about the section into INFO.
If the section is compressed, uncompress it before returning. */
info->was_mmapped = 0;
info->readin = 1;
- if (info->asection == NULL || info->size == 0)
+ if (dwarf2_section_empty_p (info))
return;
/* Check if the file has a 4-byte header indicating compression. */
bfd_get_filename (abfd));
}
+/* A helper function that returns the size of a section in a safe way.
+ If you are positive that the section has been read before using the
+ size, then it is safe to refer to the dwarf2_section_info object's
+ "size" field directly. In other cases, you must call this
+ function, because for compressed sections the size field is not set
+ correctly until the section has been read. */
+
+static bfd_size_type
+dwarf2_section_size (struct objfile *objfile,
+ struct dwarf2_section_info *info)
+{
+ if (!info->readin)
+ dwarf2_read_section (objfile, info);
+ return info->size;
+}
+
/* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
- SECTION_NAME. */
+ SECTION_NAME. */
void
dwarf2_get_section_info (struct objfile *objfile, const char *section_name,
else if (section_is_p (section_name, FRAME_SECTION))
info = &data->frame;
else
- gdb_assert (0);
+ gdb_assert_not_reached ("unexpected section");
- if (info->asection != NULL && info->size != 0 && info->buffer == NULL)
- /* We haven't read this section in yet. Do it now. */
- dwarf2_read_section (objfile, info);
+ dwarf2_read_section (objfile, info);
*sectp = info->asection;
*bufp = info->buffer;
*sizep = info->size;
}
-/* Build a partial symbol table. */
+\f
+/* DWARF quick_symbols_functions support. */
-void
-dwarf2_build_psymtabs (struct objfile *objfile)
+/* TUs can share .debug_line entries, and there can be a lot more TUs than
+ unique line tables, so we maintain a separate table of all .debug_line
+ derived entries to support the sharing.
+ All the quick functions need is the list of file names. We discard the
+ line_header when we're done and don't need to record it here. */
+struct quick_file_names
{
- if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
- {
- init_psymbol_list (objfile, 1024);
- }
+ /* The offset in .debug_line of the line table. We hash on this. */
+ unsigned int offset;
- dwarf2_build_psymtabs_hard (objfile);
-}
+ /* The number of entries in file_names, real_names. */
+ unsigned int num_file_names;
-/* Return TRUE if OFFSET is within CU_HEADER. */
+ /* The file names from the line table, after being run through
+ file_full_name. */
+ const char **file_names;
-static inline int
-offset_in_cu_p (const struct comp_unit_head *cu_header, unsigned int offset)
-{
- unsigned int bottom = cu_header->offset;
- unsigned int top = (cu_header->offset
- + cu_header->length
- + cu_header->initial_length_size);
+ /* The file names from the line table after being run through
+ gdb_realpath. These are computed lazily. */
+ const char **real_names;
+};
- return (offset >= bottom && offset < top);
-}
+/* When using the index (and thus not using psymtabs), each CU has an
+ object of this type. This is used to hold information needed by
+ the various "quick" methods. */
+struct dwarf2_per_cu_quick_data
+{
+ /* The file table. This can be NULL if there was no file table
+ or it's currently not read in.
+ NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
+ struct quick_file_names *file_names;
-/* Read in the comp unit header information from the debug_info at info_ptr.
- NOTE: This leaves members offset, first_die_offset to be filled in
- by the caller. */
+ /* The corresponding symbol table. This is NULL if symbols for this
+ CU have not yet been read. */
+ struct symtab *symtab;
-static gdb_byte *
-read_comp_unit_head (struct comp_unit_head *cu_header,
- gdb_byte *info_ptr, bfd *abfd)
-{
- int signed_addr;
- unsigned int bytes_read;
+ /* A temporary mark bit used when iterating over all CUs in
+ expand_symtabs_matching. */
+ unsigned int mark : 1;
- cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read);
- cu_header->initial_length_size = bytes_read;
- cu_header->offset_size = (bytes_read == 4) ? 4 : 8;
- info_ptr += bytes_read;
- cu_header->version = read_2_bytes (abfd, info_ptr);
- info_ptr += 2;
- cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
- &bytes_read);
- info_ptr += bytes_read;
- cu_header->addr_size = read_1_byte (abfd, info_ptr);
- info_ptr += 1;
- signed_addr = bfd_get_sign_extend_vma (abfd);
- if (signed_addr < 0)
- internal_error (__FILE__, __LINE__,
- _("read_comp_unit_head: dwarf from non elf file"));
- cu_header->signed_addr_p = signed_addr;
+ /* True if we've tried to read the file table and found there isn't one.
+ There will be no point in trying to read it again next time. */
+ unsigned int no_file_data : 1;
+};
- return info_ptr;
-}
+/* Hash function for a quick_file_names. */
-static gdb_byte *
-partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
- gdb_byte *buffer, unsigned int buffer_size,
- bfd *abfd)
+static hashval_t
+hash_file_name_entry (const void *e)
{
- gdb_byte *beg_of_comp_unit = info_ptr;
-
- info_ptr = read_comp_unit_head (header, info_ptr, abfd);
+ const struct quick_file_names *file_data = e;
- if (header->version != 2 && header->version != 3 && header->version != 4)
- error (_("Dwarf Error: wrong version in compilation unit header "
- "(is %d, should be 2, 3, or 4) [in module %s]"), header->version,
- bfd_get_filename (abfd));
+ return file_data->offset;
+}
- if (header->abbrev_offset >= dwarf2_per_objfile->abbrev.size)
- error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
- "(offset 0x%lx + 6) [in module %s]"),
- (long) header->abbrev_offset,
- (long) (beg_of_comp_unit - buffer),
- bfd_get_filename (abfd));
+/* Equality function for a quick_file_names. */
- if (beg_of_comp_unit + header->length + header->initial_length_size
- > buffer + buffer_size)
- error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
- "(offset 0x%lx + 0) [in module %s]"),
- (long) header->length,
- (long) (beg_of_comp_unit - buffer),
- bfd_get_filename (abfd));
+static int
+eq_file_name_entry (const void *a, const void *b)
+{
+ const struct quick_file_names *ea = a;
+ const struct quick_file_names *eb = b;
- return info_ptr;
+ return ea->offset == eb->offset;
}
-/* Read in the types comp unit header information from .debug_types entry at
- types_ptr. The result is a pointer to one past the end of the header. */
+/* Delete function for a quick_file_names. */
-static gdb_byte *
-read_type_comp_unit_head (struct comp_unit_head *cu_header,
- ULONGEST *signature,
- gdb_byte *types_ptr, bfd *abfd)
+static void
+delete_file_name_entry (void *e)
{
- gdb_byte *initial_types_ptr = types_ptr;
+ struct quick_file_names *file_data = e;
+ int i;
- dwarf2_read_section (dwarf2_per_objfile->objfile,
- &dwarf2_per_objfile->types);
- cu_header->offset = types_ptr - dwarf2_per_objfile->types.buffer;
+ for (i = 0; i < file_data->num_file_names; ++i)
+ {
+ xfree ((void*) file_data->file_names[i]);
+ if (file_data->real_names)
+ xfree ((void*) file_data->real_names[i]);
+ }
- types_ptr = read_comp_unit_head (cu_header, types_ptr, abfd);
+ /* The space for the struct itself lives on objfile_obstack,
+ so we don't free it here. */
+}
- *signature = read_8_bytes (abfd, types_ptr);
- types_ptr += 8;
- types_ptr += cu_header->offset_size;
- cu_header->first_die_offset = types_ptr - initial_types_ptr;
+/* Create a quick_file_names hash table. */
- return types_ptr;
+static htab_t
+create_quick_file_names_table (unsigned int nr_initial_entries)
+{
+ return htab_create_alloc (nr_initial_entries,
+ hash_file_name_entry, eq_file_name_entry,
+ delete_file_name_entry, xcalloc, xfree);
}
-/* Allocate a new partial symtab for file named NAME and mark this new
- partial symtab as being an include of PST. */
+/* Read in the symbols for PER_CU. OBJFILE is the objfile from which
+ this CU came. */
static void
-dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
- struct objfile *objfile)
+dw2_do_instantiate_symtab (struct objfile *objfile,
+ struct dwarf2_per_cu_data *per_cu)
{
- struct partial_symtab *subpst = allocate_psymtab (name, objfile);
+ struct cleanup *back_to;
- subpst->section_offsets = pst->section_offsets;
- subpst->textlow = 0;
- subpst->texthigh = 0;
+ back_to = make_cleanup (dwarf2_release_queue, NULL);
- subpst->dependencies = (struct partial_symtab **)
- obstack_alloc (&objfile->objfile_obstack,
- sizeof (struct partial_symtab *));
- subpst->dependencies[0] = pst;
- subpst->number_of_dependencies = 1;
+ queue_comp_unit (per_cu, objfile);
- subpst->globals_offset = 0;
- subpst->n_global_syms = 0;
- subpst->statics_offset = 0;
- subpst->n_static_syms = 0;
- subpst->symtab = NULL;
- subpst->read_symtab = pst->read_symtab;
- subpst->readin = 0;
+ if (per_cu->from_debug_types)
+ read_signatured_type_at_offset (objfile, per_cu->offset);
+ else
+ load_full_comp_unit (per_cu, objfile);
- /* No private part is necessary for include psymtabs. This property
- can be used to differentiate between such include psymtabs and
- the regular ones. */
- subpst->read_symtab_private = NULL;
+ process_queue (objfile);
+
+ /* Age the cache, releasing compilation units that have not
+ been used recently. */
+ age_cached_comp_units ();
+
+ do_cleanups (back_to);
}
-/* Read the Line Number Program data and extract the list of files
- included by the source file represented by PST. Build an include
- partial symtab for each of these included files. */
+/* Ensure that the symbols for PER_CU have been read in. OBJFILE is
+ the objfile from which this CU came. Returns the resulting symbol
+ table. */
-static void
-dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
- struct die_info *die,
- struct partial_symtab *pst)
+static struct symtab *
+dw2_instantiate_symtab (struct objfile *objfile,
+ struct dwarf2_per_cu_data *per_cu)
{
- struct objfile *objfile = cu->objfile;
- bfd *abfd = objfile->obfd;
- struct line_header *lh = NULL;
- struct attribute *attr;
-
- attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
- if (attr)
+ if (!per_cu->v.quick->symtab)
{
- unsigned int line_offset = DW_UNSND (attr);
-
- lh = dwarf_decode_line_header (line_offset, abfd, cu);
+ struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL);
+ increment_reading_symtab ();
+ dw2_do_instantiate_symtab (objfile, per_cu);
+ do_cleanups (back_to);
}
- if (lh == NULL)
- return; /* No linetable, so no includes. */
+ return per_cu->v.quick->symtab;
+}
- dwarf_decode_lines (lh, NULL, abfd, cu, pst);
+/* Return the CU given its index. */
- free_line_header (lh);
+static struct dwarf2_per_cu_data *
+dw2_get_cu (int index)
+{
+ if (index >= dwarf2_per_objfile->n_comp_units)
+ {
+ index -= dwarf2_per_objfile->n_comp_units;
+ return dwarf2_per_objfile->type_comp_units[index];
+ }
+ return dwarf2_per_objfile->all_comp_units[index];
}
-static hashval_t
-hash_type_signature (const void *item)
+/* A helper function that knows how to read a 64-bit value in a way
+ that doesn't make gdb die. Returns 1 if the conversion went ok, 0
+ otherwise. */
+
+static int
+extract_cu_value (const char *bytes, ULONGEST *result)
{
- const struct signatured_type *type_sig = item;
+ if (sizeof (ULONGEST) < 8)
+ {
+ int i;
- /* This drops the top 32 bits of the signature, but is ok for a hash. */
- return type_sig->signature;
+ /* Ignore the upper 4 bytes if they are all zero. */
+ for (i = 0; i < 4; ++i)
+ if (bytes[i + 4] != 0)
+ return 0;
+
+ *result = extract_unsigned_integer (bytes, 4, BFD_ENDIAN_LITTLE);
+ }
+ else
+ *result = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE);
+ return 1;
}
+/* Read the CU list from the mapped index, and use it to create all
+ the CU objects for this objfile. Return 0 if something went wrong,
+ 1 if everything went ok. */
+
static int
-eq_type_signature (const void *item_lhs, const void *item_rhs)
+create_cus_from_index (struct objfile *objfile, const gdb_byte *cu_list,
+ offset_type cu_list_elements)
{
- const struct signatured_type *lhs = item_lhs;
- const struct signatured_type *rhs = item_rhs;
+ offset_type i;
- return lhs->signature == rhs->signature;
+ dwarf2_per_objfile->n_comp_units = cu_list_elements / 2;
+ dwarf2_per_objfile->all_comp_units
+ = obstack_alloc (&objfile->objfile_obstack,
+ dwarf2_per_objfile->n_comp_units
+ * sizeof (struct dwarf2_per_cu_data *));
+
+ for (i = 0; i < cu_list_elements; i += 2)
+ {
+ struct dwarf2_per_cu_data *the_cu;
+ ULONGEST offset, length;
+
+ if (!extract_cu_value (cu_list, &offset)
+ || !extract_cu_value (cu_list + 8, &length))
+ return 0;
+ cu_list += 2 * 8;
+
+ the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack,
+ struct dwarf2_per_cu_data);
+ the_cu->offset = offset;
+ the_cu->length = length;
+ the_cu->objfile = objfile;
+ the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
+ struct dwarf2_per_cu_quick_data);
+ dwarf2_per_objfile->all_comp_units[i / 2] = the_cu;
+ }
+
+ return 1;
}
-/* Create the hash table of all entries in the .debug_types section.
- The result is zero if there is an error (e.g. missing .debug_types section),
- otherwise non-zero. */
+/* Create the signatured type hash table from the index. */
static int
-create_debug_types_hash_table (struct objfile *objfile)
+create_signatured_type_table_from_index (struct objfile *objfile,
+ const gdb_byte *bytes,
+ offset_type elements)
{
- gdb_byte *info_ptr;
- htab_t types_htab;
-
- dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
- info_ptr = dwarf2_per_objfile->types.buffer;
-
- if (info_ptr == NULL)
- {
- dwarf2_per_objfile->signatured_types = NULL;
- return 0;
- }
+ offset_type i;
+ htab_t sig_types_hash;
- types_htab = htab_create_alloc_ex (41,
- hash_type_signature,
- eq_type_signature,
- NULL,
- &objfile->objfile_obstack,
- hashtab_obstack_allocate,
- dummy_obstack_deallocate);
+ dwarf2_per_objfile->n_type_comp_units = elements / 3;
+ dwarf2_per_objfile->type_comp_units
+ = obstack_alloc (&objfile->objfile_obstack,
+ dwarf2_per_objfile->n_type_comp_units
+ * sizeof (struct dwarf2_per_cu_data *));
- if (dwarf2_die_debug)
- fprintf_unfiltered (gdb_stdlog, "Signatured types:\n");
+ sig_types_hash = allocate_signatured_type_table (objfile);
- while (info_ptr < dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
+ for (i = 0; i < elements; i += 3)
{
- unsigned int offset;
- unsigned int offset_size;
- unsigned int type_offset;
- unsigned int length, initial_length_size;
- unsigned short version;
- ULONGEST signature;
struct signatured_type *type_sig;
+ ULONGEST offset, type_offset, signature;
void **slot;
- gdb_byte *ptr = info_ptr;
-
- offset = ptr - dwarf2_per_objfile->types.buffer;
-
- /* We need to read the type's signature in order to build the hash
- table, but we don't need to read anything else just yet. */
-
- /* Sanity check to ensure entire cu is present. */
- length = read_initial_length (objfile->obfd, ptr, &initial_length_size);
- if (ptr + length + initial_length_size
- > dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
- {
- complaint (&symfile_complaints,
- _("debug type entry runs off end of `.debug_types' section, ignored"));
- break;
- }
- offset_size = initial_length_size == 4 ? 4 : 8;
- ptr += initial_length_size;
- version = bfd_get_16 (objfile->obfd, ptr);
- ptr += 2;
- ptr += offset_size; /* abbrev offset */
- ptr += 1; /* address size */
- signature = bfd_get_64 (objfile->obfd, ptr);
- ptr += 8;
- type_offset = read_offset_1 (objfile->obfd, ptr, offset_size);
+ if (!extract_cu_value (bytes, &offset)
+ || !extract_cu_value (bytes + 8, &type_offset))
+ return 0;
+ signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE);
+ bytes += 3 * 8;
- type_sig = obstack_alloc (&objfile->objfile_obstack, sizeof (*type_sig));
- memset (type_sig, 0, sizeof (*type_sig));
+ type_sig = OBSTACK_ZALLOC (&objfile->objfile_obstack,
+ struct signatured_type);
type_sig->signature = signature;
type_sig->offset = offset;
type_sig->type_offset = type_offset;
-
- slot = htab_find_slot (types_htab, type_sig, INSERT);
- gdb_assert (slot != NULL);
+ type_sig->per_cu.from_debug_types = 1;
+ type_sig->per_cu.offset = offset;
+ type_sig->per_cu.objfile = objfile;
+ type_sig->per_cu.v.quick
+ = OBSTACK_ZALLOC (&objfile->objfile_obstack,
+ struct dwarf2_per_cu_quick_data);
+
+ slot = htab_find_slot (sig_types_hash, type_sig, INSERT);
*slot = type_sig;
- if (dwarf2_die_debug)
- fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n",
- offset, phex (signature, sizeof (signature)));
-
- info_ptr = info_ptr + initial_length_size + length;
+ dwarf2_per_objfile->type_comp_units[i / 3] = &type_sig->per_cu;
}
- dwarf2_per_objfile->signatured_types = types_htab;
+ dwarf2_per_objfile->signatured_types = sig_types_hash;
return 1;
}
-/* Lookup a signature based type.
- Returns NULL if SIG is not present in the table. */
+/* Read the address map data from the mapped index, and use it to
+ populate the objfile's psymtabs_addrmap. */
-static struct signatured_type *
-lookup_signatured_type (struct objfile *objfile, ULONGEST sig)
+static void
+create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index)
{
- struct signatured_type find_entry, *entry;
+ const gdb_byte *iter, *end;
+ struct obstack temp_obstack;
+ struct addrmap *mutable_map;
+ struct cleanup *cleanup;
+ CORE_ADDR baseaddr;
- if (dwarf2_per_objfile->signatured_types == NULL)
+ obstack_init (&temp_obstack);
+ cleanup = make_cleanup_obstack_free (&temp_obstack);
+ mutable_map = addrmap_create_mutable (&temp_obstack);
+
+ iter = index->address_table;
+ end = iter + index->address_table_size;
+
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+
+ while (iter < end)
{
- complaint (&symfile_complaints,
- _("missing `.debug_types' section for DW_FORM_sig8 die"));
- return 0;
+ ULONGEST hi, lo, cu_index;
+ lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
+ iter += 8;
+ hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
+ iter += 8;
+ cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE);
+ iter += 4;
+
+ addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1,
+ dw2_get_cu (cu_index));
}
- find_entry.signature = sig;
- entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
- return entry;
+ objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map,
+ &objfile->objfile_obstack);
+ do_cleanups (cleanup);
}
-/* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
+/* The hash function for strings in the mapped index. This is the
+ same as the hashtab.c hash function, but we keep a separate copy to
+ maintain control over the implementation. This is necessary
+ because the hash function is tied to the format of the mapped index
+ file. */
-static void
-init_cu_die_reader (struct die_reader_specs *reader,
- struct dwarf2_cu *cu)
+static hashval_t
+mapped_index_string_hash (const void *p)
{
- reader->abfd = cu->objfile->obfd;
- reader->cu = cu;
- if (cu->per_cu->from_debug_types)
- {
- gdb_assert (dwarf2_per_objfile->types.readin);
- reader->buffer = dwarf2_per_objfile->types.buffer;
- }
- else
- {
- gdb_assert (dwarf2_per_objfile->info.readin);
- reader->buffer = dwarf2_per_objfile->info.buffer;
- }
+ const unsigned char *str = (const unsigned char *) p;
+ hashval_t r = 0;
+ unsigned char c;
+
+ while ((c = *str++) != 0)
+ r = r * 67 + c - 113;
+
+ return r;
}
-/* Find the base address of the compilation unit for range lists and
- location lists. It will normally be specified by DW_AT_low_pc.
- In DWARF-3 draft 4, the base address could be overridden by
- DW_AT_entry_pc. It's been removed, but GCC still uses this for
- compilation units with discontinuous ranges. */
+/* Find a slot in the mapped index INDEX for the object named NAME.
+ If NAME is found, set *VEC_OUT to point to the CU vector in the
+ constant pool and return 1. If NAME cannot be found, return 0. */
-static void
-dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu)
+static int
+find_slot_in_mapped_hash (struct mapped_index *index, const char *name,
+ offset_type **vec_out)
{
- struct attribute *attr;
+ offset_type hash = mapped_index_string_hash (name);
+ offset_type slot, step;
- cu->base_known = 0;
- cu->base_address = 0;
+ slot = hash & (index->symbol_table_slots - 1);
+ step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1;
- attr = dwarf2_attr (die, DW_AT_entry_pc, cu);
- if (attr)
- {
- cu->base_address = DW_ADDR (attr);
- cu->base_known = 1;
- }
- else
+ for (;;)
{
- attr = dwarf2_attr (die, DW_AT_low_pc, cu);
- if (attr)
+ /* Convert a slot number to an offset into the table. */
+ offset_type i = 2 * slot;
+ const char *str;
+ if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0)
+ return 0;
+
+ str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]);
+ if (!strcmp (name, str))
{
- cu->base_address = DW_ADDR (attr);
- cu->base_known = 1;
+ *vec_out = (offset_type *) (index->constant_pool
+ + MAYBE_SWAP (index->symbol_table[i + 1]));
+ return 1;
}
+
+ slot = (slot + step) & (index->symbol_table_slots - 1);
}
}
-/* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
- to combine the common parts.
- Process a compilation unit for a psymtab.
- BUFFER is a pointer to the beginning of the dwarf section buffer,
- either .debug_info or debug_types.
- INFO_PTR is a pointer to the start of the CU.
- Returns a pointer to the next CU. */
+/* Read the index file. If everything went ok, initialize the "quick"
+ elements of all the CUs and return 1. Otherwise, return 0. */
-static gdb_byte *
-process_psymtab_comp_unit (struct objfile *objfile,
- struct dwarf2_per_cu_data *this_cu,
- gdb_byte *buffer, gdb_byte *info_ptr,
- unsigned int buffer_size)
+static int
+dwarf2_read_index (struct objfile *objfile)
+{
+ char *addr;
+ struct mapped_index *map;
+ offset_type *metadata;
+ const gdb_byte *cu_list;
+ const gdb_byte *types_list = NULL;
+ offset_type version, cu_list_elements;
+ offset_type types_list_elements = 0;
+ int i;
+
+ if (dwarf2_section_empty_p (&dwarf2_per_objfile->gdb_index))
+ return 0;
+
+ /* Older elfutils strip versions could keep the section in the main
+ executable while splitting it for the separate debug info file. */
+ if ((bfd_get_file_flags (dwarf2_per_objfile->gdb_index.asection)
+ & SEC_HAS_CONTENTS) == 0)
+ return 0;
+
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->gdb_index);
+
+ addr = dwarf2_per_objfile->gdb_index.buffer;
+ /* Version check. */
+ version = MAYBE_SWAP (*(offset_type *) addr);
+ /* Versions earlier than 3 emitted every copy of a psymbol. This
+ causes the index to behave very poorly for certain requests. Version 4
+ contained incomplete addrmap. So, it seems better to just ignore such
+ indices. */
+ if (version < 4)
+ return 0;
+ /* Indexes with higher version than the one supported by GDB may be no
+ longer backward compatible. */
+ if (version > 4)
+ return 0;
+
+ map = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct mapped_index);
+ map->total_size = dwarf2_per_objfile->gdb_index.size;
+
+ metadata = (offset_type *) (addr + sizeof (offset_type));
+
+ i = 0;
+ cu_list = addr + MAYBE_SWAP (metadata[i]);
+ cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i]))
+ / 8);
+ ++i;
+
+ types_list = addr + MAYBE_SWAP (metadata[i]);
+ types_list_elements = ((MAYBE_SWAP (metadata[i + 1])
+ - MAYBE_SWAP (metadata[i]))
+ / 8);
+ ++i;
+
+ map->address_table = addr + MAYBE_SWAP (metadata[i]);
+ map->address_table_size = (MAYBE_SWAP (metadata[i + 1])
+ - MAYBE_SWAP (metadata[i]));
+ ++i;
+
+ map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i]));
+ map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1])
+ - MAYBE_SWAP (metadata[i]))
+ / (2 * sizeof (offset_type)));
+ ++i;
+
+ map->constant_pool = addr + MAYBE_SWAP (metadata[i]);
+
+ if (!create_cus_from_index (objfile, cu_list, cu_list_elements))
+ return 0;
+
+ if (types_list_elements
+ && !create_signatured_type_table_from_index (objfile, types_list,
+ types_list_elements))
+ return 0;
+
+ create_addrmap_from_index (objfile, map);
+
+ dwarf2_per_objfile->index_table = map;
+ dwarf2_per_objfile->using_index = 1;
+ dwarf2_per_objfile->quick_file_names_table =
+ create_quick_file_names_table (dwarf2_per_objfile->n_comp_units);
+
+ return 1;
+}
+
+/* A helper for the "quick" functions which sets the global
+ dwarf2_per_objfile according to OBJFILE. */
+
+static void
+dw2_setup (struct objfile *objfile)
+{
+ dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
+ gdb_assert (dwarf2_per_objfile);
+}
+
+/* A helper for the "quick" functions which attempts to read the line
+ table for THIS_CU. */
+
+static struct quick_file_names *
+dw2_get_file_names (struct objfile *objfile,
+ struct dwarf2_per_cu_data *this_cu)
{
bfd *abfd = objfile->obfd;
- gdb_byte *beg_of_comp_unit = info_ptr;
+ struct line_header *lh;
+ struct attribute *attr;
+ struct cleanup *cleanups;
struct die_info *comp_unit_die;
- struct partial_symtab *pst;
- CORE_ADDR baseaddr;
- struct cleanup *back_to_inner;
+ struct dwarf2_section_info* sec;
+ gdb_byte *beg_of_comp_unit, *info_ptr, *buffer;
+ int has_children, i;
struct dwarf2_cu cu;
- int has_children, has_pc_info;
- struct attribute *attr;
- CORE_ADDR best_lowpc = 0, best_highpc = 0;
+ unsigned int bytes_read, buffer_size;
struct die_reader_specs reader_specs;
+ char *name, *comp_dir;
+ void **slot;
+ struct quick_file_names *qfn;
+ unsigned int line_offset;
+
+ if (this_cu->v.quick->file_names != NULL)
+ return this_cu->v.quick->file_names;
+ /* If we know there is no line data, no point in looking again. */
+ if (this_cu->v.quick->no_file_data)
+ return NULL;
- memset (&cu, 0, sizeof (cu));
- cu.objfile = objfile;
- obstack_init (&cu.comp_unit_obstack);
+ init_one_comp_unit (&cu, objfile);
+ cleanups = make_cleanup (free_stack_comp_unit, &cu);
- back_to_inner = make_cleanup (free_stack_comp_unit, &cu);
+ if (this_cu->from_debug_types)
+ sec = &dwarf2_per_objfile->types;
+ else
+ sec = &dwarf2_per_objfile->info;
+ dwarf2_read_section (objfile, sec);
+ buffer_size = sec->size;
+ buffer = sec->buffer;
+ info_ptr = buffer + this_cu->offset;
+ beg_of_comp_unit = info_ptr;
info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
buffer, buffer_size,
cu.header.offset = beg_of_comp_unit - buffer;
cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
- cu.list_in_scope = &file_symbols;
-
- /* If this compilation unit was already read in, free the
- cached copy in order to read it in again. This is
- necessary because we skipped some symbols when we first
- read in the compilation unit (see load_partial_dies).
- This problem could be avoided, but the benefit is
- unclear. */
- if (this_cu->cu != NULL)
- free_one_cached_comp_unit (this_cu->cu);
-
- /* Note that this is a pointer to our stack frame, being
- added to a global data structure. It will be cleaned up
- in free_stack_comp_unit when we finish with this
- compilation unit. */
this_cu->cu = &cu;
cu.per_cu = this_cu;
- /* Read the abbrevs for this compilation unit into a table. */
dwarf2_read_abbrevs (abfd, &cu);
make_cleanup (dwarf2_free_abbrev_table, &cu);
- /* Read the compilation unit die. */
if (this_cu->from_debug_types)
info_ptr += 8 /*signature*/ + cu.header.offset_size;
init_cu_die_reader (&reader_specs, &cu);
- info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
- &has_children);
+ read_full_die (&reader_specs, &comp_unit_die, info_ptr,
+ &has_children);
- if (this_cu->from_debug_types)
+ lh = NULL;
+ slot = NULL;
+ line_offset = 0;
+ attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, &cu);
+ if (attr)
{
- /* offset,length haven't been set yet for type units. */
- this_cu->offset = cu.header.offset;
- this_cu->length = cu.header.length + cu.header.initial_length_size;
+ struct quick_file_names find_entry;
+
+ line_offset = DW_UNSND (attr);
+
+ /* We may have already read in this line header (TU line header sharing).
+ If we have we're done. */
+ find_entry.offset = line_offset;
+ slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table,
+ &find_entry, INSERT);
+ if (*slot != NULL)
+ {
+ do_cleanups (cleanups);
+ this_cu->v.quick->file_names = *slot;
+ return *slot;
+ }
+
+ lh = dwarf_decode_line_header (line_offset, abfd, &cu);
}
- else if (comp_unit_die->tag == DW_TAG_partial_unit)
+ if (lh == NULL)
{
- info_ptr = (beg_of_comp_unit + cu.header.length
- + cu.header.initial_length_size);
- do_cleanups (back_to_inner);
- return info_ptr;
+ do_cleanups (cleanups);
+ this_cu->v.quick->no_file_data = 1;
+ return NULL;
}
- /* Set the language we're debugging. */
- attr = dwarf2_attr (comp_unit_die, DW_AT_language, &cu);
- if (attr)
- set_cu_language (DW_UNSND (attr), &cu);
- else
- set_cu_language (language_minimal, &cu);
+ qfn = obstack_alloc (&objfile->objfile_obstack, sizeof (*qfn));
+ qfn->offset = line_offset;
+ gdb_assert (slot != NULL);
+ *slot = qfn;
- /* Allocate a new partial symbol table structure. */
- attr = dwarf2_attr (comp_unit_die, DW_AT_name, &cu);
- pst = start_psymtab_common (objfile, objfile->section_offsets,
- (attr != NULL) ? DW_STRING (attr) : "",
- /* TEXTLOW and TEXTHIGH are set below. */
- 0,
- objfile->global_psymbols.next,
- objfile->static_psymbols.next);
+ find_file_and_directory (comp_unit_die, &cu, &name, &comp_dir);
- attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, &cu);
- if (attr != NULL)
- pst->dirname = DW_STRING (attr);
+ qfn->num_file_names = lh->num_file_names;
+ qfn->file_names = obstack_alloc (&objfile->objfile_obstack,
+ lh->num_file_names * sizeof (char *));
+ for (i = 0; i < lh->num_file_names; ++i)
+ qfn->file_names[i] = file_full_name (i + 1, lh, comp_dir);
+ qfn->real_names = NULL;
- pst->read_symtab_private = this_cu;
+ free_line_header (lh);
+ do_cleanups (cleanups);
- baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+ this_cu->v.quick->file_names = qfn;
+ return qfn;
+}
- /* Store the function that reads in the rest of the symbol table */
- pst->read_symtab = dwarf2_psymtab_to_symtab;
+/* A helper for the "quick" functions which computes and caches the
+ real path for a given file name from the line table. */
- this_cu->psymtab = pst;
+static const char *
+dw2_get_real_path (struct objfile *objfile,
+ struct quick_file_names *qfn, int index)
+{
+ if (qfn->real_names == NULL)
+ qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack,
+ qfn->num_file_names, sizeof (char *));
- dwarf2_find_base_address (comp_unit_die, &cu);
+ if (qfn->real_names[index] == NULL)
+ qfn->real_names[index] = gdb_realpath (qfn->file_names[index]);
- /* Possibly set the default values of LOWPC and HIGHPC from
- `DW_AT_ranges'. */
- has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc,
- &best_highpc, &cu, pst);
- if (has_pc_info == 1 && best_lowpc < best_highpc)
- /* Store the contiguous range if it is not empty; it can be empty for
- CUs with no code. */
- addrmap_set_empty (objfile->psymtabs_addrmap,
- best_lowpc + baseaddr,
- best_highpc + baseaddr - 1, pst);
+ return qfn->real_names[index];
+}
- /* Check if comp unit has_children.
- If so, read the rest of the partial symbols from this comp unit.
- If not, there's no more debug_info for this comp unit. */
- if (has_children)
- {
- struct partial_die_info *first_die;
- CORE_ADDR lowpc, highpc;
+static struct symtab *
+dw2_find_last_source_symtab (struct objfile *objfile)
+{
+ int index;
- lowpc = ((CORE_ADDR) -1);
- highpc = ((CORE_ADDR) 0);
+ dw2_setup (objfile);
+ index = dwarf2_per_objfile->n_comp_units - 1;
+ return dw2_instantiate_symtab (objfile, dw2_get_cu (index));
+}
- first_die = load_partial_dies (abfd, buffer, info_ptr, 1, &cu);
+/* Traversal function for dw2_forget_cached_source_info. */
- scan_partial_symbols (first_die, &lowpc, &highpc,
- ! has_pc_info, &cu);
+static int
+dw2_free_cached_file_names (void **slot, void *info)
+{
+ struct quick_file_names *file_data = (struct quick_file_names *) *slot;
- /* If we didn't find a lowpc, set it to highpc to avoid
- complaints from `maint check'. */
- if (lowpc == ((CORE_ADDR) -1))
- lowpc = highpc;
+ if (file_data->real_names)
+ {
+ int i;
- /* If the compilation unit didn't have an explicit address range,
- then use the information extracted from its child dies. */
- if (! has_pc_info)
+ for (i = 0; i < file_data->num_file_names; ++i)
{
- best_lowpc = lowpc;
- best_highpc = highpc;
+ xfree ((void*) file_data->real_names[i]);
+ file_data->real_names[i] = NULL;
}
}
- pst->textlow = best_lowpc + baseaddr;
- pst->texthigh = best_highpc + baseaddr;
- pst->n_global_syms = objfile->global_psymbols.next -
- (objfile->global_psymbols.list + pst->globals_offset);
- pst->n_static_syms = objfile->static_psymbols.next -
- (objfile->static_psymbols.list + pst->statics_offset);
- sort_pst_symbols (pst);
+ return 1;
+}
- info_ptr = (beg_of_comp_unit + cu.header.length
- + cu.header.initial_length_size);
+static void
+dw2_forget_cached_source_info (struct objfile *objfile)
+{
+ dw2_setup (objfile);
- if (this_cu->from_debug_types)
+ htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table,
+ dw2_free_cached_file_names, NULL);
+}
+
+static int
+dw2_lookup_symtab (struct objfile *objfile, const char *name,
+ const char *full_path, const char *real_path,
+ struct symtab **result)
+{
+ int i;
+ int check_basename = lbasename (name) == name;
+ struct dwarf2_per_cu_data *base_cu = NULL;
+
+ dw2_setup (objfile);
+
+ for (i = 0; i < (dwarf2_per_objfile->n_comp_units
+ + dwarf2_per_objfile->n_type_comp_units); ++i)
{
- /* It's not clear we want to do anything with stmt lists here.
- Waiting to see what gcc ultimately does. */
+ int j;
+ struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
+ struct quick_file_names *file_data;
+
+ if (per_cu->v.quick->symtab)
+ continue;
+
+ file_data = dw2_get_file_names (objfile, per_cu);
+ if (file_data == NULL)
+ continue;
+
+ for (j = 0; j < file_data->num_file_names; ++j)
+ {
+ const char *this_name = file_data->file_names[j];
+
+ if (FILENAME_CMP (name, this_name) == 0)
+ {
+ *result = dw2_instantiate_symtab (objfile, per_cu);
+ return 1;
+ }
+
+ if (check_basename && ! base_cu
+ && FILENAME_CMP (lbasename (this_name), name) == 0)
+ base_cu = per_cu;
+
+ if (full_path != NULL)
+ {
+ const char *this_real_name = dw2_get_real_path (objfile,
+ file_data, j);
+
+ if (this_real_name != NULL
+ && FILENAME_CMP (full_path, this_real_name) == 0)
+ {
+ *result = dw2_instantiate_symtab (objfile, per_cu);
+ return 1;
+ }
+ }
+
+ if (real_path != NULL)
+ {
+ const char *this_real_name = dw2_get_real_path (objfile,
+ file_data, j);
+
+ if (this_real_name != NULL
+ && FILENAME_CMP (real_path, this_real_name) == 0)
+ {
+ *result = dw2_instantiate_symtab (objfile, per_cu);
+ return 1;
+ }
+ }
+ }
}
- else
+
+ if (base_cu)
{
- /* Get the list of files included in the current compilation unit,
- and build a psymtab for each of them. */
- dwarf2_build_include_psymtabs (&cu, comp_unit_die, pst);
+ *result = dw2_instantiate_symtab (objfile, base_cu);
+ return 1;
}
- do_cleanups (back_to_inner);
+ return 0;
+}
- return info_ptr;
+static struct symtab *
+dw2_lookup_symbol (struct objfile *objfile, int block_index,
+ const char *name, domain_enum domain)
+{
+ /* We do all the work in the pre_expand_symtabs_matching hook
+ instead. */
+ return NULL;
}
-/* Traversal function for htab_traverse_noresize.
- Process one .debug_types comp-unit. */
+/* A helper function that expands all symtabs that hold an object
+ named NAME. */
-static int
-process_type_comp_unit (void **slot, void *info)
+static void
+dw2_do_expand_symtabs_matching (struct objfile *objfile, const char *name)
{
- struct signatured_type *entry = (struct signatured_type *) *slot;
- struct objfile *objfile = (struct objfile *) info;
- struct dwarf2_per_cu_data *this_cu;
+ dw2_setup (objfile);
- this_cu = &entry->per_cu;
- this_cu->from_debug_types = 1;
+ /* index_table is NULL if OBJF_READNOW. */
+ if (dwarf2_per_objfile->index_table)
+ {
+ offset_type *vec;
- gdb_assert (dwarf2_per_objfile->types.readin);
- process_psymtab_comp_unit (objfile, this_cu,
- dwarf2_per_objfile->types.buffer,
- dwarf2_per_objfile->types.buffer + entry->offset,
- dwarf2_per_objfile->types.size);
+ if (find_slot_in_mapped_hash (dwarf2_per_objfile->index_table,
+ name, &vec))
+ {
+ offset_type i, len = MAYBE_SWAP (*vec);
+ for (i = 0; i < len; ++i)
+ {
+ offset_type cu_index = MAYBE_SWAP (vec[i + 1]);
+ struct dwarf2_per_cu_data *per_cu = dw2_get_cu (cu_index);
- return 1;
+ dw2_instantiate_symtab (objfile, per_cu);
+ }
+ }
+ }
}
-/* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
- Build partial symbol tables for the .debug_types comp-units. */
+static void
+dw2_pre_expand_symtabs_matching (struct objfile *objfile,
+ int kind, const char *name,
+ domain_enum domain)
+{
+ dw2_do_expand_symtabs_matching (objfile, name);
+}
static void
-build_type_psymtabs (struct objfile *objfile)
+dw2_print_stats (struct objfile *objfile)
{
- if (! create_debug_types_hash_table (objfile))
- return;
+ int i, count;
- htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
- process_type_comp_unit, objfile);
+ dw2_setup (objfile);
+ count = 0;
+ for (i = 0; i < (dwarf2_per_objfile->n_comp_units
+ + dwarf2_per_objfile->n_type_comp_units); ++i)
+ {
+ struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
+
+ if (!per_cu->v.quick->symtab)
+ ++count;
+ }
+ printf_filtered (_(" Number of unread CUs: %d\n"), count);
}
-/* A cleanup function that clears objfile's psymtabs_addrmap field. */
+static void
+dw2_dump (struct objfile *objfile)
+{
+ /* Nothing worth printing. */
+}
static void
-psymtabs_addrmap_cleanup (void *o)
+dw2_relocate (struct objfile *objfile, struct section_offsets *new_offsets,
+ struct section_offsets *delta)
{
- struct objfile *objfile = o;
+ /* There's nothing to relocate here. */
+}
- objfile->psymtabs_addrmap = NULL;
+static void
+dw2_expand_symtabs_for_function (struct objfile *objfile,
+ const char *func_name)
+{
+ dw2_do_expand_symtabs_matching (objfile, func_name);
}
-/* Build the partial symbol table by doing a quick pass through the
- .debug_info and .debug_abbrev sections. */
+static void
+dw2_expand_all_symtabs (struct objfile *objfile)
+{
+ int i;
+
+ dw2_setup (objfile);
+
+ for (i = 0; i < (dwarf2_per_objfile->n_comp_units
+ + dwarf2_per_objfile->n_type_comp_units); ++i)
+ {
+ struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
+
+ dw2_instantiate_symtab (objfile, per_cu);
+ }
+}
static void
-dwarf2_build_psymtabs_hard (struct objfile *objfile)
+dw2_expand_symtabs_with_filename (struct objfile *objfile,
+ const char *filename)
{
- gdb_byte *info_ptr;
- struct cleanup *back_to, *addrmap_cleanup;
- struct obstack temp_obstack;
+ int i;
- dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
- info_ptr = dwarf2_per_objfile->info.buffer;
+ dw2_setup (objfile);
- /* Any cached compilation units will be linked by the per-objfile
- read_in_chain. Make sure to free them when we're done. */
- back_to = make_cleanup (free_cached_comp_units, NULL);
+ /* We don't need to consider type units here.
+ This is only called for examining code, e.g. expand_line_sal.
+ There can be an order of magnitude (or more) more type units
+ than comp units, and we avoid them if we can. */
- build_type_psymtabs (objfile);
+ for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
+ {
+ int j;
+ struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
+ struct quick_file_names *file_data;
- create_all_comp_units (objfile);
+ if (per_cu->v.quick->symtab)
+ continue;
- /* Create a temporary address map on a temporary obstack. We later
- copy this to the final obstack. */
- obstack_init (&temp_obstack);
- make_cleanup_obstack_free (&temp_obstack);
- objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack);
- addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile);
+ file_data = dw2_get_file_names (objfile, per_cu);
+ if (file_data == NULL)
+ continue;
- /* Since the objects we're extracting from .debug_info vary in
- length, only the individual functions to extract them (like
- read_comp_unit_head and load_partial_die) can really know whether
- the buffer is large enough to hold another complete object.
+ for (j = 0; j < file_data->num_file_names; ++j)
+ {
+ const char *this_name = file_data->file_names[j];
+ if (FILENAME_CMP (this_name, filename) == 0)
+ {
+ dw2_instantiate_symtab (objfile, per_cu);
+ break;
+ }
+ }
+ }
+}
- At the moment, they don't actually check that. If .debug_info
- holds just one extra byte after the last compilation unit's dies,
- then read_comp_unit_head will happily read off the end of the
- buffer. read_partial_die is similarly casual. Those functions
- should be fixed.
+static const char *
+dw2_find_symbol_file (struct objfile *objfile, const char *name)
+{
+ struct dwarf2_per_cu_data *per_cu;
+ offset_type *vec;
+ struct quick_file_names *file_data;
- For this loop condition, simply checking whether there's any data
- left at all should be sufficient. */
+ dw2_setup (objfile);
- while (info_ptr < (dwarf2_per_objfile->info.buffer
- + dwarf2_per_objfile->info.size))
- {
- struct dwarf2_per_cu_data *this_cu;
+ /* index_table is NULL if OBJF_READNOW. */
+ if (!dwarf2_per_objfile->index_table)
+ return NULL;
- this_cu = dwarf2_find_comp_unit (info_ptr - dwarf2_per_objfile->info.buffer,
- objfile);
+ if (!find_slot_in_mapped_hash (dwarf2_per_objfile->index_table,
+ name, &vec))
+ return NULL;
- info_ptr = process_psymtab_comp_unit (objfile, this_cu,
- dwarf2_per_objfile->info.buffer,
- info_ptr,
- dwarf2_per_objfile->info.size);
- }
+ /* Note that this just looks at the very first one named NAME -- but
+ actually we are looking for a function. find_main_filename
+ should be rewritten so that it doesn't require a custom hook. It
+ could just use the ordinary symbol tables. */
+ /* vec[0] is the length, which must always be >0. */
+ per_cu = dw2_get_cu (MAYBE_SWAP (vec[1]));
- objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
- &objfile->objfile_obstack);
- discard_cleanups (addrmap_cleanup);
+ file_data = dw2_get_file_names (objfile, per_cu);
+ if (file_data == NULL)
+ return NULL;
- do_cleanups (back_to);
+ return file_data->file_names[file_data->num_file_names - 1];
}
-/* Load the partial DIEs for a secondary CU into memory. */
+static void
+dw2_map_matching_symbols (const char * name, domain_enum namespace,
+ struct objfile *objfile, int global,
+ int (*callback) (struct block *,
+ struct symbol *, void *),
+ void *data, symbol_compare_ftype *match,
+ symbol_compare_ftype *ordered_compare)
+{
+ /* Currently unimplemented; used for Ada. The function can be called if the
+ current language is Ada for a non-Ada objfile using GNU index. As Ada
+ does not look for non-Ada symbols this function should just return. */
+}
static void
-load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu,
- struct objfile *objfile)
+dw2_expand_symtabs_matching (struct objfile *objfile,
+ int (*file_matcher) (const char *, void *),
+ int (*name_matcher) (const char *, void *),
+ domain_enum kind,
+ void *data)
{
- bfd *abfd = objfile->obfd;
- gdb_byte *info_ptr, *beg_of_comp_unit;
- struct die_info *comp_unit_die;
- struct dwarf2_cu *cu;
- struct cleanup *back_to;
- struct attribute *attr;
- int has_children;
- struct die_reader_specs reader_specs;
+ int i;
+ offset_type iter;
+ struct mapped_index *index;
- gdb_assert (! this_cu->from_debug_types);
+ dw2_setup (objfile);
- gdb_assert (dwarf2_per_objfile->info.readin);
- info_ptr = dwarf2_per_objfile->info.buffer + this_cu->offset;
- beg_of_comp_unit = info_ptr;
+ /* index_table is NULL if OBJF_READNOW. */
+ if (!dwarf2_per_objfile->index_table)
+ return;
+ index = dwarf2_per_objfile->index_table;
- cu = alloc_one_comp_unit (objfile);
+ for (i = 0; i < (dwarf2_per_objfile->n_comp_units
+ + dwarf2_per_objfile->n_type_comp_units); ++i)
+ {
+ int j;
+ struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
+ struct quick_file_names *file_data;
- /* ??? Missing cleanup for CU? */
+ per_cu->v.quick->mark = 0;
+ if (per_cu->v.quick->symtab)
+ continue;
- /* Link this compilation unit into the compilation unit tree. */
- this_cu->cu = cu;
- cu->per_cu = this_cu;
- cu->type_hash = this_cu->type_hash;
+ file_data = dw2_get_file_names (objfile, per_cu);
+ if (file_data == NULL)
+ continue;
- info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr,
- dwarf2_per_objfile->info.buffer,
- dwarf2_per_objfile->info.size,
- abfd);
+ for (j = 0; j < file_data->num_file_names; ++j)
+ {
+ if (file_matcher (file_data->file_names[j], data))
+ {
+ per_cu->v.quick->mark = 1;
+ break;
+ }
+ }
+ }
- /* Complete the cu_header. */
- cu->header.offset = this_cu->offset;
- cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
+ for (iter = 0; iter < index->symbol_table_slots; ++iter)
+ {
+ offset_type idx = 2 * iter;
+ const char *name;
+ offset_type *vec, vec_len, vec_idx;
- /* Read the abbrevs for this compilation unit into a table. */
- dwarf2_read_abbrevs (abfd, cu);
- back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
+ if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0)
+ continue;
- /* Read the compilation unit die. */
- init_cu_die_reader (&reader_specs, cu);
- info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
- &has_children);
+ name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]);
- /* Set the language we're debugging. */
- attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu);
- if (attr)
- set_cu_language (DW_UNSND (attr), cu);
- else
- set_cu_language (language_minimal, cu);
+ if (! (*name_matcher) (name, data))
+ continue;
- /* Check if comp unit has_children.
- If so, read the rest of the partial symbols from this comp unit.
- If not, there's no more debug_info for this comp unit. */
- if (has_children)
- load_partial_dies (abfd, dwarf2_per_objfile->info.buffer, info_ptr, 0, cu);
+ /* The name was matched, now expand corresponding CUs that were
+ marked. */
+ vec = (offset_type *) (index->constant_pool
+ + MAYBE_SWAP (index->symbol_table[idx + 1]));
+ vec_len = MAYBE_SWAP (vec[0]);
+ for (vec_idx = 0; vec_idx < vec_len; ++vec_idx)
+ {
+ struct dwarf2_per_cu_data *per_cu;
- do_cleanups (back_to);
+ per_cu = dw2_get_cu (MAYBE_SWAP (vec[vec_idx + 1]));
+ if (per_cu->v.quick->mark)
+ dw2_instantiate_symtab (objfile, per_cu);
+ }
+ }
}
-/* Create a list of all compilation units in OBJFILE. We do this only
- if an inter-comp-unit reference is found; presumably if there is one,
- there will be many, and one will occur early in the .debug_info section.
- So there's no point in building this list incrementally. */
+static struct symtab *
+dw2_find_pc_sect_symtab (struct objfile *objfile,
+ struct minimal_symbol *msymbol,
+ CORE_ADDR pc,
+ struct obj_section *section,
+ int warn_if_readin)
+{
+ struct dwarf2_per_cu_data *data;
+
+ dw2_setup (objfile);
+
+ if (!objfile->psymtabs_addrmap)
+ return NULL;
+
+ data = addrmap_find (objfile->psymtabs_addrmap, pc);
+ if (!data)
+ return NULL;
+
+ if (warn_if_readin && data->v.quick->symtab)
+ warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
+ paddress (get_objfile_arch (objfile), pc));
+
+ return dw2_instantiate_symtab (objfile, data);
+}
static void
-create_all_comp_units (struct objfile *objfile)
+dw2_map_symbol_names (struct objfile *objfile,
+ void (*fun) (const char *, void *),
+ void *data)
{
- int n_allocated;
- int n_comp_units;
- struct dwarf2_per_cu_data **all_comp_units;
- gdb_byte *info_ptr;
+ offset_type iter;
+ struct mapped_index *index;
- dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
- info_ptr = dwarf2_per_objfile->info.buffer;
+ dw2_setup (objfile);
- n_comp_units = 0;
- n_allocated = 10;
- all_comp_units = xmalloc (n_allocated
- * sizeof (struct dwarf2_per_cu_data *));
+ /* index_table is NULL if OBJF_READNOW. */
+ if (!dwarf2_per_objfile->index_table)
+ return;
+ index = dwarf2_per_objfile->index_table;
- while (info_ptr < dwarf2_per_objfile->info.buffer + dwarf2_per_objfile->info.size)
+ for (iter = 0; iter < index->symbol_table_slots; ++iter)
{
- unsigned int length, initial_length_size;
- struct dwarf2_per_cu_data *this_cu;
- unsigned int offset;
-
- offset = info_ptr - dwarf2_per_objfile->info.buffer;
-
- /* Read just enough information to find out where the next
- compilation unit is. */
- length = read_initial_length (objfile->obfd, info_ptr,
- &initial_length_size);
+ offset_type idx = 2 * iter;
+ const char *name;
+ offset_type *vec, vec_len, vec_idx;
- /* Save the compilation unit for later lookup. */
- this_cu = obstack_alloc (&objfile->objfile_obstack,
- sizeof (struct dwarf2_per_cu_data));
- memset (this_cu, 0, sizeof (*this_cu));
- this_cu->offset = offset;
- this_cu->length = length + initial_length_size;
+ if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0)
+ continue;
- if (n_comp_units == n_allocated)
- {
- n_allocated *= 2;
- all_comp_units = xrealloc (all_comp_units,
- n_allocated
- * sizeof (struct dwarf2_per_cu_data *));
- }
- all_comp_units[n_comp_units++] = this_cu;
+ name = (index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]));
- info_ptr = info_ptr + this_cu->length;
+ (*fun) (name, data);
}
-
- dwarf2_per_objfile->all_comp_units
- = obstack_alloc (&objfile->objfile_obstack,
- n_comp_units * sizeof (struct dwarf2_per_cu_data *));
- memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
- n_comp_units * sizeof (struct dwarf2_per_cu_data *));
- xfree (all_comp_units);
- dwarf2_per_objfile->n_comp_units = n_comp_units;
}
-/* Process all loaded DIEs for compilation unit CU, starting at
- FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
- unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
- DW_AT_ranges). If NEED_PC is set, then this function will set
- *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
- and record the covered ranges in the addrmap. */
-
static void
-scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
- CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
+dw2_map_symbol_filenames (struct objfile *objfile,
+ void (*fun) (const char *, const char *, void *),
+ void *data)
{
- struct partial_die_info *pdi;
-
- /* Now, march along the PDI's, descending into ones which have
- interesting children but skipping the children of the other ones,
- until we reach the end of the compilation unit. */
+ int i;
- pdi = first_die;
+ dw2_setup (objfile);
- while (pdi != NULL)
+ for (i = 0; i < (dwarf2_per_objfile->n_comp_units
+ + dwarf2_per_objfile->n_type_comp_units); ++i)
{
- fixup_partial_die (pdi, cu);
+ int j;
+ struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
+ struct quick_file_names *file_data;
- /* Anonymous namespaces or modules have no name but have interesting
- children, so we need to look at them. Ditto for anonymous
- enums. */
+ if (per_cu->v.quick->symtab)
+ continue;
- if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
- || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type)
+ file_data = dw2_get_file_names (objfile, per_cu);
+ if (file_data == NULL)
+ continue;
+
+ for (j = 0; j < file_data->num_file_names; ++j)
{
- switch (pdi->tag)
- {
- case DW_TAG_subprogram:
- add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
- break;
- case DW_TAG_variable:
- case DW_TAG_typedef:
- case DW_TAG_union_type:
- if (!pdi->is_declaration)
- {
- add_partial_symbol (pdi, cu);
- }
- break;
- case DW_TAG_class_type:
- case DW_TAG_interface_type:
- case DW_TAG_structure_type:
- if (!pdi->is_declaration)
- {
- add_partial_symbol (pdi, cu);
- }
- break;
- case DW_TAG_enumeration_type:
- if (!pdi->is_declaration)
- add_partial_enumeration (pdi, cu);
- break;
- case DW_TAG_base_type:
- case DW_TAG_subrange_type:
- /* File scope base type definitions are added to the partial
- symbol table. */
- add_partial_symbol (pdi, cu);
- break;
- case DW_TAG_namespace:
- add_partial_namespace (pdi, lowpc, highpc, need_pc, cu);
- break;
- case DW_TAG_module:
- add_partial_module (pdi, lowpc, highpc, need_pc, cu);
- break;
- default:
- break;
- }
+ const char *this_real_name = dw2_get_real_path (objfile, file_data,
+ j);
+ (*fun) (file_data->file_names[j], this_real_name, data);
}
-
- /* If the die has a sibling, skip to the sibling. */
-
- pdi = pdi->die_sibling;
}
}
-/* Functions used to compute the fully scoped name of a partial DIE.
+static int
+dw2_has_symbols (struct objfile *objfile)
+{
+ return 1;
+}
- Normally, this is simple. For C++, the parent DIE's fully scoped
- name is concatenated with "::" and the partial DIE's name. For
- Java, the same thing occurs except that "." is used instead of "::".
- Enumerators are an exception; they use the scope of their parent
- enumeration type, i.e. the name of the enumeration type is not
- prepended to the enumerator.
+const struct quick_symbol_functions dwarf2_gdb_index_functions =
+{
+ dw2_has_symbols,
+ dw2_find_last_source_symtab,
+ dw2_forget_cached_source_info,
+ dw2_lookup_symtab,
+ dw2_lookup_symbol,
+ dw2_pre_expand_symtabs_matching,
+ dw2_print_stats,
+ dw2_dump,
+ dw2_relocate,
+ dw2_expand_symtabs_for_function,
+ dw2_expand_all_symtabs,
+ dw2_expand_symtabs_with_filename,
+ dw2_find_symbol_file,
+ dw2_map_matching_symbols,
+ dw2_expand_symtabs_matching,
+ dw2_find_pc_sect_symtab,
+ dw2_map_symbol_names,
+ dw2_map_symbol_filenames
+};
- There are two complexities. One is DW_AT_specification; in this
- case "parent" means the parent of the target of the specification,
- instead of the direct parent of the DIE. The other is compilers
- which do not emit DW_TAG_namespace; in this case we try to guess
- the fully qualified name of structure types from their members'
- linkage names. This must be done using the DIE's children rather
- than the children of any DW_AT_specification target. We only need
- to do this for structures at the top level, i.e. if the target of
- any DW_AT_specification (if any; otherwise the DIE itself) does not
- have a parent. */
+/* Initialize for reading DWARF for this objfile. Return 0 if this
+ file will use psymtabs, or 1 if using the GNU index. */
-/* Compute the scope prefix associated with PDI's parent, in
- compilation unit CU. The result will be allocated on CU's
- comp_unit_obstack, or a copy of the already allocated PDI->NAME
- field. NULL is returned if no prefix is necessary. */
-static char *
-partial_die_parent_scope (struct partial_die_info *pdi,
- struct dwarf2_cu *cu)
+int
+dwarf2_initialize_objfile (struct objfile *objfile)
{
- char *grandparent_scope;
- struct partial_die_info *parent, *real_pdi;
+ /* If we're about to read full symbols, don't bother with the
+ indices. In this case we also don't care if some other debug
+ format is making psymtabs, because they are all about to be
+ expanded anyway. */
+ if ((objfile->flags & OBJF_READNOW))
+ {
+ int i;
- /* We need to look at our parent DIE; if we have a DW_AT_specification,
- then this means the parent of the specification DIE. */
+ dwarf2_per_objfile->using_index = 1;
+ create_all_comp_units (objfile);
+ create_debug_types_hash_table (objfile);
+ dwarf2_per_objfile->quick_file_names_table =
+ create_quick_file_names_table (dwarf2_per_objfile->n_comp_units);
- real_pdi = pdi;
- while (real_pdi->has_specification)
- real_pdi = find_partial_die (real_pdi->spec_offset, cu);
+ for (i = 0; i < (dwarf2_per_objfile->n_comp_units
+ + dwarf2_per_objfile->n_type_comp_units); ++i)
+ {
+ struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
- parent = real_pdi->die_parent;
- if (parent == NULL)
- return NULL;
+ per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
+ struct dwarf2_per_cu_quick_data);
+ }
- if (parent->scope_set)
- return parent->scope;
+ /* Return 1 so that gdb sees the "quick" functions. However,
+ these functions will be no-ops because we will have expanded
+ all symtabs. */
+ return 1;
+ }
- fixup_partial_die (parent, cu);
+ if (dwarf2_read_index (objfile))
+ return 1;
- grandparent_scope = partial_die_parent_scope (parent, cu);
+ return 0;
+}
- /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
- DW_TAG_namespace DIEs with a name of "::" for the global namespace.
- Work around this problem here. */
- if (cu->language == language_cplus
- && parent->tag == DW_TAG_namespace
- && strcmp (parent->name, "::") == 0
- && grandparent_scope == NULL)
- {
- parent->scope = NULL;
- parent->scope_set = 1;
- return NULL;
- }
+\f
- if (parent->tag == DW_TAG_namespace
- || parent->tag == DW_TAG_module
- || parent->tag == DW_TAG_structure_type
- || parent->tag == DW_TAG_class_type
- || parent->tag == DW_TAG_interface_type
- || parent->tag == DW_TAG_union_type
- || parent->tag == DW_TAG_enumeration_type)
- {
- if (grandparent_scope == NULL)
- parent->scope = parent->name;
- else
- parent->scope = typename_concat (&cu->comp_unit_obstack, grandparent_scope,
- parent->name, 0, cu);
- }
- else if (parent->tag == DW_TAG_enumerator)
- /* Enumerators should not get the name of the enumeration as a prefix. */
- parent->scope = grandparent_scope;
- else
+/* Build a partial symbol table. */
+
+void
+dwarf2_build_psymtabs (struct objfile *objfile)
+{
+ if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
{
- /* FIXME drow/2004-04-01: What should we be doing with
- function-local names? For partial symbols, we should probably be
- ignoring them. */
- complaint (&symfile_complaints,
- _("unhandled containing DIE tag %d for DIE at %d"),
- parent->tag, pdi->offset);
- parent->scope = grandparent_scope;
+ init_psymbol_list (objfile, 1024);
}
- parent->scope_set = 1;
- return parent->scope;
+ dwarf2_build_psymtabs_hard (objfile);
}
-/* Return the fully scoped name associated with PDI, from compilation unit
- CU. The result will be allocated with malloc. */
-static char *
-partial_die_full_name (struct partial_die_info *pdi,
- struct dwarf2_cu *cu)
+/* Return TRUE if OFFSET is within CU_HEADER. */
+
+static inline int
+offset_in_cu_p (const struct comp_unit_head *cu_header, unsigned int offset)
{
- char *parent_scope;
+ unsigned int bottom = cu_header->offset;
+ unsigned int top = (cu_header->offset
+ + cu_header->length
+ + cu_header->initial_length_size);
- parent_scope = partial_die_parent_scope (pdi, cu);
- if (parent_scope == NULL)
- return NULL;
- else
- return typename_concat (NULL, parent_scope, pdi->name, 0, cu);
+ return (offset >= bottom && offset < top);
}
-static void
-add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
+/* Read in the comp unit header information from the debug_info at info_ptr.
+ NOTE: This leaves members offset, first_die_offset to be filled in
+ by the caller. */
+
+static gdb_byte *
+read_comp_unit_head (struct comp_unit_head *cu_header,
+ gdb_byte *info_ptr, bfd *abfd)
{
- struct objfile *objfile = cu->objfile;
- CORE_ADDR addr = 0;
- char *actual_name = NULL;
- const struct partial_symbol *psym = NULL;
- CORE_ADDR baseaddr;
- int built_actual_name = 0;
+ int signed_addr;
+ unsigned int bytes_read;
- baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+ cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read);
+ cu_header->initial_length_size = bytes_read;
+ cu_header->offset_size = (bytes_read == 4) ? 4 : 8;
+ info_ptr += bytes_read;
+ cu_header->version = read_2_bytes (abfd, info_ptr);
+ info_ptr += 2;
+ cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
+ &bytes_read);
+ info_ptr += bytes_read;
+ cu_header->addr_size = read_1_byte (abfd, info_ptr);
+ info_ptr += 1;
+ signed_addr = bfd_get_sign_extend_vma (abfd);
+ if (signed_addr < 0)
+ internal_error (__FILE__, __LINE__,
+ _("read_comp_unit_head: dwarf from non elf file"));
+ cu_header->signed_addr_p = signed_addr;
- actual_name = partial_die_full_name (pdi, cu);
- if (actual_name)
- built_actual_name = 1;
+ return info_ptr;
+}
- if (actual_name == NULL)
- actual_name = pdi->name;
+static gdb_byte *
+partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
+ gdb_byte *buffer, unsigned int buffer_size,
+ bfd *abfd)
+{
+ gdb_byte *beg_of_comp_unit = info_ptr;
- switch (pdi->tag)
- {
- case DW_TAG_subprogram:
- if (pdi->is_external || cu->language == language_ada)
- {
- /* brobecker/2007-12-26: Normally, only "external" DIEs are part
- of the global scope. But in Ada, we want to be able to access
- nested procedures globally. So all Ada subprograms are stored
- in the global scope. */
- /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
- mst_text, objfile); */
- psym = add_psymbol_to_list (actual_name, strlen (actual_name),
- built_actual_name,
- VAR_DOMAIN, LOC_BLOCK,
- &objfile->global_psymbols,
- 0, pdi->lowpc + baseaddr,
- cu->language, objfile);
- }
- else
- {
- /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
- mst_file_text, objfile); */
- psym = add_psymbol_to_list (actual_name, strlen (actual_name),
- built_actual_name,
- VAR_DOMAIN, LOC_BLOCK,
- &objfile->static_psymbols,
- 0, pdi->lowpc + baseaddr,
- cu->language, objfile);
- }
- break;
- case DW_TAG_variable:
- if (pdi->is_external)
- {
- /* Global Variable.
- Don't enter into the minimal symbol tables as there is
- a minimal symbol table entry from the ELF symbols already.
- Enter into partial symbol table if it has a location
- descriptor or a type.
- If the location descriptor is missing, new_symbol will create
- a LOC_UNRESOLVED symbol, the address of the variable will then
- be determined from the minimal symbol table whenever the variable
- is referenced.
- The address for the partial symbol table entry is not
- used by GDB, but it comes in handy for debugging partial symbol
- table building. */
+ info_ptr = read_comp_unit_head (header, info_ptr, abfd);
- if (pdi->locdesc)
- addr = decode_locdesc (pdi->locdesc, cu);
- if (pdi->locdesc || pdi->has_type)
- psym = add_psymbol_to_list (actual_name, strlen (actual_name),
- built_actual_name,
- VAR_DOMAIN, LOC_STATIC,
- &objfile->global_psymbols,
- 0, addr + baseaddr,
- cu->language, objfile);
- }
- else
- {
- /* Static Variable. Skip symbols without location descriptors. */
- if (pdi->locdesc == NULL)
- {
- if (built_actual_name)
- xfree (actual_name);
- return;
- }
- addr = decode_locdesc (pdi->locdesc, cu);
- /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
- mst_file_data, objfile); */
- psym = add_psymbol_to_list (actual_name, strlen (actual_name),
- built_actual_name,
- VAR_DOMAIN, LOC_STATIC,
- &objfile->static_psymbols,
- 0, addr + baseaddr,
- cu->language, objfile);
- }
- break;
- case DW_TAG_typedef:
- case DW_TAG_base_type:
- case DW_TAG_subrange_type:
- add_psymbol_to_list (actual_name, strlen (actual_name),
- built_actual_name,
- VAR_DOMAIN, LOC_TYPEDEF,
- &objfile->static_psymbols,
- 0, (CORE_ADDR) 0, cu->language, objfile);
- break;
- case DW_TAG_namespace:
- add_psymbol_to_list (actual_name, strlen (actual_name),
- built_actual_name,
- VAR_DOMAIN, LOC_TYPEDEF,
- &objfile->global_psymbols,
- 0, (CORE_ADDR) 0, cu->language, objfile);
- break;
- case DW_TAG_class_type:
- case DW_TAG_interface_type:
- case DW_TAG_structure_type:
- case DW_TAG_union_type:
- case DW_TAG_enumeration_type:
- /* Skip external references. The DWARF standard says in the section
- about "Structure, Union, and Class Type Entries": "An incomplete
- structure, union or class type is represented by a structure,
- union or class entry that does not have a byte size attribute
- and that has a DW_AT_declaration attribute." */
- if (!pdi->has_byte_size && pdi->is_declaration)
- {
- if (built_actual_name)
- xfree (actual_name);
- return;
- }
+ if (header->version != 2 && header->version != 3 && header->version != 4)
+ error (_("Dwarf Error: wrong version in compilation unit header "
+ "(is %d, should be 2, 3, or 4) [in module %s]"), header->version,
+ bfd_get_filename (abfd));
- /* NOTE: carlton/2003-10-07: See comment in new_symbol about
- static vs. global. */
- add_psymbol_to_list (actual_name, strlen (actual_name),
- built_actual_name,
- STRUCT_DOMAIN, LOC_TYPEDEF,
- (cu->language == language_cplus
- || cu->language == language_java)
- ? &objfile->global_psymbols
- : &objfile->static_psymbols,
- 0, (CORE_ADDR) 0, cu->language, objfile);
+ if (header->abbrev_offset
+ >= dwarf2_section_size (dwarf2_per_objfile->objfile,
+ &dwarf2_per_objfile->abbrev))
+ error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
+ "(offset 0x%lx + 6) [in module %s]"),
+ (long) header->abbrev_offset,
+ (long) (beg_of_comp_unit - buffer),
+ bfd_get_filename (abfd));
- break;
- case DW_TAG_enumerator:
- add_psymbol_to_list (actual_name, strlen (actual_name),
- built_actual_name,
- VAR_DOMAIN, LOC_CONST,
- (cu->language == language_cplus
- || cu->language == language_java)
- ? &objfile->global_psymbols
- : &objfile->static_psymbols,
- 0, (CORE_ADDR) 0, cu->language, objfile);
- break;
- default:
- break;
- }
+ if (beg_of_comp_unit + header->length + header->initial_length_size
+ > buffer + buffer_size)
+ error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
+ "(offset 0x%lx + 0) [in module %s]"),
+ (long) header->length,
+ (long) (beg_of_comp_unit - buffer),
+ bfd_get_filename (abfd));
- if (built_actual_name)
- xfree (actual_name);
+ return info_ptr;
}
-/* Read a partial die corresponding to a namespace; also, add a symbol
- corresponding to that namespace to the symbol table. NAMESPACE is
- the name of the enclosing namespace. */
+/* Read in the types comp unit header information from .debug_types entry at
+ types_ptr. The result is a pointer to one past the end of the header. */
-static void
-add_partial_namespace (struct partial_die_info *pdi,
- CORE_ADDR *lowpc, CORE_ADDR *highpc,
- int need_pc, struct dwarf2_cu *cu)
+static gdb_byte *
+read_type_comp_unit_head (struct comp_unit_head *cu_header,
+ ULONGEST *signature,
+ gdb_byte *types_ptr, bfd *abfd)
{
- /* Add a symbol for the namespace. */
+ gdb_byte *initial_types_ptr = types_ptr;
- add_partial_symbol (pdi, cu);
+ dwarf2_read_section (dwarf2_per_objfile->objfile,
+ &dwarf2_per_objfile->types);
+ cu_header->offset = types_ptr - dwarf2_per_objfile->types.buffer;
- /* Now scan partial symbols in that namespace. */
+ types_ptr = read_comp_unit_head (cu_header, types_ptr, abfd);
- if (pdi->has_children)
- scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
+ *signature = read_8_bytes (abfd, types_ptr);
+ types_ptr += 8;
+ types_ptr += cu_header->offset_size;
+ cu_header->first_die_offset = types_ptr - initial_types_ptr;
+
+ return types_ptr;
}
-/* Read a partial die corresponding to a Fortran module. */
+/* Allocate a new partial symtab for file named NAME and mark this new
+ partial symtab as being an include of PST. */
static void
-add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
- CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
+dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
+ struct objfile *objfile)
{
- /* Now scan partial symbols in that module. */
+ struct partial_symtab *subpst = allocate_psymtab (name, objfile);
- if (pdi->has_children)
- scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
-}
+ subpst->section_offsets = pst->section_offsets;
+ subpst->textlow = 0;
+ subpst->texthigh = 0;
-/* Read a partial die corresponding to a subprogram and create a partial
- symbol for that subprogram. When the CU language allows it, this
- routine also defines a partial symbol for each nested subprogram
- that this subprogram contains.
+ subpst->dependencies = (struct partial_symtab **)
+ obstack_alloc (&objfile->objfile_obstack,
+ sizeof (struct partial_symtab *));
+ subpst->dependencies[0] = pst;
+ subpst->number_of_dependencies = 1;
- DIE my also be a lexical block, in which case we simply search
- recursively for suprograms defined inside that lexical block.
- Again, this is only performed when the CU language allows this
- type of definitions. */
+ subpst->globals_offset = 0;
+ subpst->n_global_syms = 0;
+ subpst->statics_offset = 0;
+ subpst->n_static_syms = 0;
+ subpst->symtab = NULL;
+ subpst->read_symtab = pst->read_symtab;
+ subpst->readin = 0;
+
+ /* No private part is necessary for include psymtabs. This property
+ can be used to differentiate between such include psymtabs and
+ the regular ones. */
+ subpst->read_symtab_private = NULL;
+}
+
+/* Read the Line Number Program data and extract the list of files
+ included by the source file represented by PST. Build an include
+ partial symtab for each of these included files. */
static void
-add_partial_subprogram (struct partial_die_info *pdi,
- CORE_ADDR *lowpc, CORE_ADDR *highpc,
- int need_pc, struct dwarf2_cu *cu)
+dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
+ struct die_info *die,
+ struct partial_symtab *pst)
{
- if (pdi->tag == DW_TAG_subprogram)
+ struct objfile *objfile = cu->objfile;
+ bfd *abfd = objfile->obfd;
+ struct line_header *lh = NULL;
+ struct attribute *attr;
+
+ attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
+ if (attr)
{
- if (pdi->has_pc_info)
- {
- if (pdi->lowpc < *lowpc)
- *lowpc = pdi->lowpc;
- if (pdi->highpc > *highpc)
- *highpc = pdi->highpc;
- if (need_pc)
- {
- CORE_ADDR baseaddr;
- struct objfile *objfile = cu->objfile;
+ unsigned int line_offset = DW_UNSND (attr);
- baseaddr = ANOFFSET (objfile->section_offsets,
- SECT_OFF_TEXT (objfile));
- addrmap_set_empty (objfile->psymtabs_addrmap,
- pdi->lowpc + baseaddr,
- pdi->highpc - 1 + baseaddr,
- cu->per_cu->psymtab);
- }
- if (!pdi->is_declaration)
- /* Ignore subprogram DIEs that do not have a name, they are
- illegal. Do not emit a complaint at this point, we will
- do so when we convert this psymtab into a symtab. */
- if (pdi->name)
- add_partial_symbol (pdi, cu);
- }
+ lh = dwarf_decode_line_header (line_offset, abfd, cu);
}
+ if (lh == NULL)
+ return; /* No linetable, so no includes. */
- if (! pdi->has_children)
- return;
+ /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
+ dwarf_decode_lines (lh, pst->dirname, abfd, cu, pst);
- if (cu->language == language_ada)
- {
- pdi = pdi->die_child;
- while (pdi != NULL)
- {
- fixup_partial_die (pdi, cu);
- if (pdi->tag == DW_TAG_subprogram
- || pdi->tag == DW_TAG_lexical_block)
- add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
- pdi = pdi->die_sibling;
- }
- }
+ free_line_header (lh);
}
-/* See if we can figure out if the class lives in a namespace. We do
- this by looking for a member function; its demangled name will
- contain namespace info, if there is any. */
-
-static void
-guess_structure_name (struct partial_die_info *struct_pdi,
- struct dwarf2_cu *cu)
+static hashval_t
+hash_type_signature (const void *item)
{
- if ((cu->language == language_cplus
- || cu->language == language_java)
- && cu->has_namespace_info == 0
- && struct_pdi->has_children)
- {
- /* NOTE: carlton/2003-10-07: Getting the info this way changes
- what template types look like, because the demangler
- frequently doesn't give the same name as the debug info. We
- could fix this by only using the demangled name to get the
- prefix (but see comment in read_structure_type). */
+ const struct signatured_type *type_sig = item;
+
+ /* This drops the top 32 bits of the signature, but is ok for a hash. */
+ return type_sig->signature;
+}
- struct partial_die_info *real_pdi;
+static int
+eq_type_signature (const void *item_lhs, const void *item_rhs)
+{
+ const struct signatured_type *lhs = item_lhs;
+ const struct signatured_type *rhs = item_rhs;
- /* If this DIE (this DIE's specification, if any) has a parent, then
- we should not do this. We'll prepend the parent's fully qualified
- name when we create the partial symbol. */
+ return lhs->signature == rhs->signature;
+}
- real_pdi = struct_pdi;
- while (real_pdi->has_specification)
- real_pdi = find_partial_die (real_pdi->spec_offset, cu);
+/* Allocate a hash table for signatured types. */
- if (real_pdi->die_parent != NULL)
- return;
- }
+static htab_t
+allocate_signatured_type_table (struct objfile *objfile)
+{
+ return htab_create_alloc_ex (41,
+ hash_type_signature,
+ eq_type_signature,
+ NULL,
+ &objfile->objfile_obstack,
+ hashtab_obstack_allocate,
+ dummy_obstack_deallocate);
}
-/* Read a partial die corresponding to an enumeration type. */
+/* A helper function to add a signatured type CU to a list. */
-static void
-add_partial_enumeration (struct partial_die_info *enum_pdi,
- struct dwarf2_cu *cu)
+static int
+add_signatured_type_cu_to_list (void **slot, void *datum)
{
- struct partial_die_info *pdi;
+ struct signatured_type *sigt = *slot;
+ struct dwarf2_per_cu_data ***datap = datum;
- if (enum_pdi->name != NULL)
- add_partial_symbol (enum_pdi, cu);
+ **datap = &sigt->per_cu;
+ ++*datap;
- pdi = enum_pdi->die_child;
- while (pdi)
- {
- if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
- complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
- else
- add_partial_symbol (pdi, cu);
- pdi = pdi->die_sibling;
- }
+ return 1;
}
-/* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
- Return the corresponding abbrev, or NULL if the number is zero (indicating
- an empty DIE). In either case *BYTES_READ will be set to the length of
- the initial number. */
+/* Create the hash table of all entries in the .debug_types section.
+ The result is zero if there is an error (e.g. missing .debug_types section),
+ otherwise non-zero. */
-static struct abbrev_info *
-peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
- struct dwarf2_cu *cu)
+static int
+create_debug_types_hash_table (struct objfile *objfile)
{
- bfd *abfd = cu->objfile->obfd;
- unsigned int abbrev_number;
- struct abbrev_info *abbrev;
+ gdb_byte *info_ptr;
+ htab_t types_htab;
+ struct dwarf2_per_cu_data **iter;
- abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
+ info_ptr = dwarf2_per_objfile->types.buffer;
- if (abbrev_number == 0)
- return NULL;
+ if (info_ptr == NULL)
+ {
+ dwarf2_per_objfile->signatured_types = NULL;
+ return 0;
+ }
- abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
- if (!abbrev)
+ types_htab = allocate_signatured_type_table (objfile);
+
+ if (dwarf2_die_debug)
+ fprintf_unfiltered (gdb_stdlog, "Signatured types:\n");
+
+ while (info_ptr < dwarf2_per_objfile->types.buffer
+ + dwarf2_per_objfile->types.size)
{
- error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number,
- bfd_get_filename (abfd));
+ unsigned int offset;
+ unsigned int offset_size;
+ unsigned int type_offset;
+ unsigned int length, initial_length_size;
+ unsigned short version;
+ ULONGEST signature;
+ struct signatured_type *type_sig;
+ void **slot;
+ gdb_byte *ptr = info_ptr;
+
+ offset = ptr - dwarf2_per_objfile->types.buffer;
+
+ /* We need to read the type's signature in order to build the hash
+ table, but we don't need to read anything else just yet. */
+
+ /* Sanity check to ensure entire cu is present. */
+ length = read_initial_length (objfile->obfd, ptr, &initial_length_size);
+ if (ptr + length + initial_length_size
+ > dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
+ {
+ complaint (&symfile_complaints,
+ _("debug type entry runs off end "
+ "of `.debug_types' section, ignored"));
+ break;
+ }
+
+ offset_size = initial_length_size == 4 ? 4 : 8;
+ ptr += initial_length_size;
+ version = bfd_get_16 (objfile->obfd, ptr);
+ ptr += 2;
+ ptr += offset_size; /* abbrev offset */
+ ptr += 1; /* address size */
+ signature = bfd_get_64 (objfile->obfd, ptr);
+ ptr += 8;
+ type_offset = read_offset_1 (objfile->obfd, ptr, offset_size);
+
+ type_sig = obstack_alloc (&objfile->objfile_obstack, sizeof (*type_sig));
+ memset (type_sig, 0, sizeof (*type_sig));
+ type_sig->signature = signature;
+ type_sig->offset = offset;
+ type_sig->type_offset = type_offset;
+ type_sig->per_cu.objfile = objfile;
+ type_sig->per_cu.from_debug_types = 1;
+
+ slot = htab_find_slot (types_htab, type_sig, INSERT);
+ gdb_assert (slot != NULL);
+ *slot = type_sig;
+
+ if (dwarf2_die_debug)
+ fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n",
+ offset, phex (signature, sizeof (signature)));
+
+ info_ptr = info_ptr + initial_length_size + length;
}
- return abbrev;
+ dwarf2_per_objfile->signatured_types = types_htab;
+
+ dwarf2_per_objfile->n_type_comp_units = htab_elements (types_htab);
+ dwarf2_per_objfile->type_comp_units
+ = obstack_alloc (&objfile->objfile_obstack,
+ dwarf2_per_objfile->n_type_comp_units
+ * sizeof (struct dwarf2_per_cu_data *));
+ iter = &dwarf2_per_objfile->type_comp_units[0];
+ htab_traverse_noresize (types_htab, add_signatured_type_cu_to_list, &iter);
+ gdb_assert (iter - &dwarf2_per_objfile->type_comp_units[0]
+ == dwarf2_per_objfile->n_type_comp_units);
+
+ return 1;
}
-/* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
- Returns a pointer to the end of a series of DIEs, terminated by an empty
- DIE. Any children of the skipped DIEs will also be skipped. */
+/* Lookup a signature based type.
+ Returns NULL if SIG is not present in the table. */
-static gdb_byte *
-skip_children (gdb_byte *buffer, gdb_byte *info_ptr, struct dwarf2_cu *cu)
+static struct signatured_type *
+lookup_signatured_type (struct objfile *objfile, ULONGEST sig)
{
- struct abbrev_info *abbrev;
- unsigned int bytes_read;
+ struct signatured_type find_entry, *entry;
- while (1)
+ if (dwarf2_per_objfile->signatured_types == NULL)
{
- abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
- if (abbrev == NULL)
- return info_ptr + bytes_read;
- else
- info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
+ complaint (&symfile_complaints,
+ _("missing `.debug_types' section for DW_FORM_sig8 die"));
+ return 0;
}
+
+ find_entry.signature = sig;
+ entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
+ return entry;
}
-/* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
- INFO_PTR should point just after the initial uleb128 of a DIE, and the
- abbrev corresponding to that skipped uleb128 should be passed in
- ABBREV. Returns a pointer to this DIE's sibling, skipping any
- children. */
+/* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
-static gdb_byte *
-skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
- struct abbrev_info *abbrev, struct dwarf2_cu *cu)
+static void
+init_cu_die_reader (struct die_reader_specs *reader,
+ struct dwarf2_cu *cu)
{
- unsigned int bytes_read;
- struct attribute attr;
- bfd *abfd = cu->objfile->obfd;
- unsigned int form, i;
+ reader->abfd = cu->objfile->obfd;
+ reader->cu = cu;
+ if (cu->per_cu->from_debug_types)
+ {
+ gdb_assert (dwarf2_per_objfile->types.readin);
+ reader->buffer = dwarf2_per_objfile->types.buffer;
+ }
+ else
+ {
+ gdb_assert (dwarf2_per_objfile->info.readin);
+ reader->buffer = dwarf2_per_objfile->info.buffer;
+ }
+}
- for (i = 0; i < abbrev->num_attrs; i++)
+/* Find the base address of the compilation unit for range lists and
+ location lists. It will normally be specified by DW_AT_low_pc.
+ In DWARF-3 draft 4, the base address could be overridden by
+ DW_AT_entry_pc. It's been removed, but GCC still uses this for
+ compilation units with discontinuous ranges. */
+
+static void
+dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct attribute *attr;
+
+ cu->base_known = 0;
+ cu->base_address = 0;
+
+ attr = dwarf2_attr (die, DW_AT_entry_pc, cu);
+ if (attr)
{
- /* The only abbrev we care about is DW_AT_sibling. */
- if (abbrev->attrs[i].name == DW_AT_sibling)
+ cu->base_address = DW_ADDR (attr);
+ cu->base_known = 1;
+ }
+ else
+ {
+ attr = dwarf2_attr (die, DW_AT_low_pc, cu);
+ if (attr)
{
- read_attribute (&attr, &abbrev->attrs[i],
- abfd, info_ptr, cu);
- if (attr.form == DW_FORM_ref_addr)
- complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
- else
- return buffer + dwarf2_get_ref_die_offset (&attr);
+ cu->base_address = DW_ADDR (attr);
+ cu->base_known = 1;
}
+ }
+}
- /* If it isn't DW_AT_sibling, skip this attribute. */
- form = abbrev->attrs[i].form;
- skip_attribute:
- switch (form)
- {
- case DW_FORM_ref_addr:
- /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
- and later it is offset sized. */
- if (cu->header.version == 2)
- info_ptr += cu->header.addr_size;
- else
- info_ptr += cu->header.offset_size;
- break;
- case DW_FORM_addr:
- info_ptr += cu->header.addr_size;
- break;
- case DW_FORM_data1:
- case DW_FORM_ref1:
- case DW_FORM_flag:
- info_ptr += 1;
- break;
- case DW_FORM_flag_present:
- break;
- case DW_FORM_data2:
- case DW_FORM_ref2:
- info_ptr += 2;
- break;
- case DW_FORM_data4:
- case DW_FORM_ref4:
- info_ptr += 4;
- break;
- case DW_FORM_data8:
- case DW_FORM_ref8:
- case DW_FORM_sig8:
- info_ptr += 8;
- break;
- case DW_FORM_string:
- read_string (abfd, info_ptr, &bytes_read);
- info_ptr += bytes_read;
- break;
- case DW_FORM_sec_offset:
- case DW_FORM_strp:
- info_ptr += cu->header.offset_size;
- break;
- case DW_FORM_exprloc:
- case DW_FORM_block:
- info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
- info_ptr += bytes_read;
- break;
- case DW_FORM_block1:
- info_ptr += 1 + read_1_byte (abfd, info_ptr);
- break;
- case DW_FORM_block2:
- info_ptr += 2 + read_2_bytes (abfd, info_ptr);
- break;
- case DW_FORM_block4:
- info_ptr += 4 + read_4_bytes (abfd, info_ptr);
- break;
- case DW_FORM_sdata:
- case DW_FORM_udata:
- case DW_FORM_ref_udata:
- info_ptr = skip_leb128 (abfd, info_ptr);
- break;
- case DW_FORM_indirect:
- form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
- info_ptr += bytes_read;
- /* We need to continue parsing from here, so just go back to
- the top. */
- goto skip_attribute;
-
- default:
- error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
- dwarf_form_name (form),
- bfd_get_filename (abfd));
- }
- }
-
- if (abbrev->has_children)
- return skip_children (buffer, info_ptr, cu);
- else
- return info_ptr;
-}
-
-/* Locate ORIG_PDI's sibling.
- INFO_PTR should point to the start of the next DIE after ORIG_PDI
- in BUFFER. */
+/* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
+ to combine the common parts.
+ Process a compilation unit for a psymtab.
+ BUFFER is a pointer to the beginning of the dwarf section buffer,
+ either .debug_info or debug_types.
+ INFO_PTR is a pointer to the start of the CU.
+ Returns a pointer to the next CU. */
static gdb_byte *
-locate_pdi_sibling (struct partial_die_info *orig_pdi,
- gdb_byte *buffer, gdb_byte *info_ptr,
- bfd *abfd, struct dwarf2_cu *cu)
+process_psymtab_comp_unit (struct objfile *objfile,
+ struct dwarf2_per_cu_data *this_cu,
+ gdb_byte *buffer, gdb_byte *info_ptr,
+ unsigned int buffer_size)
{
- /* Do we know the sibling already? */
-
- if (orig_pdi->sibling)
- return orig_pdi->sibling;
+ bfd *abfd = objfile->obfd;
+ gdb_byte *beg_of_comp_unit = info_ptr;
+ struct die_info *comp_unit_die;
+ struct partial_symtab *pst;
+ CORE_ADDR baseaddr;
+ struct cleanup *back_to_inner;
+ struct dwarf2_cu cu;
+ int has_children, has_pc_info;
+ struct attribute *attr;
+ CORE_ADDR best_lowpc = 0, best_highpc = 0;
+ struct die_reader_specs reader_specs;
+ const char *filename;
- /* Are there any children to deal with? */
+ init_one_comp_unit (&cu, objfile);
+ back_to_inner = make_cleanup (free_stack_comp_unit, &cu);
- if (!orig_pdi->has_children)
- return info_ptr;
+ info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
+ buffer, buffer_size,
+ abfd);
- /* Skip the children the long way. */
+ /* Complete the cu_header. */
+ cu.header.offset = beg_of_comp_unit - buffer;
+ cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
- return skip_children (buffer, info_ptr, cu);
-}
+ cu.list_in_scope = &file_symbols;
-/* Expand this partial symbol table into a full symbol table. */
+ /* If this compilation unit was already read in, free the
+ cached copy in order to read it in again. This is
+ necessary because we skipped some symbols when we first
+ read in the compilation unit (see load_partial_dies).
+ This problem could be avoided, but the benefit is
+ unclear. */
+ if (this_cu->cu != NULL)
+ free_one_cached_comp_unit (this_cu->cu);
-static void
-dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
-{
- /* FIXME: This is barely more than a stub. */
- if (pst != NULL)
- {
- if (pst->readin)
- {
- warning (_("bug: psymtab for %s is already read in."), pst->filename);
- }
- else
- {
- if (info_verbose)
- {
- printf_filtered (_("Reading in symbols for %s..."), pst->filename);
- gdb_flush (gdb_stdout);
- }
+ /* Note that this is a pointer to our stack frame, being
+ added to a global data structure. It will be cleaned up
+ in free_stack_comp_unit when we finish with this
+ compilation unit. */
+ this_cu->cu = &cu;
+ cu.per_cu = this_cu;
- /* Restore our global data. */
- dwarf2_per_objfile = objfile_data (pst->objfile,
- dwarf2_objfile_data_key);
+ /* Read the abbrevs for this compilation unit into a table. */
+ dwarf2_read_abbrevs (abfd, &cu);
+ make_cleanup (dwarf2_free_abbrev_table, &cu);
- /* If this psymtab is constructed from a debug-only objfile, the
- has_section_at_zero flag will not necessarily be correct. We
- can get the correct value for this flag by looking at the data
- associated with the (presumably stripped) associated objfile. */
- if (pst->objfile->separate_debug_objfile_backlink)
- {
- struct dwarf2_per_objfile *dpo_backlink
- = objfile_data (pst->objfile->separate_debug_objfile_backlink,
- dwarf2_objfile_data_key);
+ /* Read the compilation unit die. */
+ if (this_cu->from_debug_types)
+ info_ptr += 8 /*signature*/ + cu.header.offset_size;
+ init_cu_die_reader (&reader_specs, &cu);
+ info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
+ &has_children);
- dwarf2_per_objfile->has_section_at_zero
- = dpo_backlink->has_section_at_zero;
- }
+ if (this_cu->from_debug_types)
+ {
+ /* offset,length haven't been set yet for type units. */
+ this_cu->offset = cu.header.offset;
+ this_cu->length = cu.header.length + cu.header.initial_length_size;
+ }
+ else if (comp_unit_die->tag == DW_TAG_partial_unit)
+ {
+ info_ptr = (beg_of_comp_unit + cu.header.length
+ + cu.header.initial_length_size);
+ do_cleanups (back_to_inner);
+ return info_ptr;
+ }
- psymtab_to_symtab_1 (pst);
+ prepare_one_comp_unit (&cu, comp_unit_die);
- /* Finish up the debug error message. */
- if (info_verbose)
- printf_filtered (_("done.\n"));
- }
- }
-}
+ /* Allocate a new partial symbol table structure. */
+ attr = dwarf2_attr (comp_unit_die, DW_AT_name, &cu);
+ if (attr == NULL || !DW_STRING (attr))
+ filename = "";
+ else
+ filename = DW_STRING (attr);
+ pst = start_psymtab_common (objfile, objfile->section_offsets,
+ filename,
+ /* TEXTLOW and TEXTHIGH are set below. */
+ 0,
+ objfile->global_psymbols.next,
+ objfile->static_psymbols.next);
-/* Add PER_CU to the queue. */
+ attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, &cu);
+ if (attr != NULL)
+ pst->dirname = DW_STRING (attr);
-static void
-queue_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
-{
- struct dwarf2_queue_item *item;
+ pst->read_symtab_private = this_cu;
- per_cu->queued = 1;
- item = xmalloc (sizeof (*item));
- item->per_cu = per_cu;
- item->next = NULL;
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
- if (dwarf2_queue == NULL)
- dwarf2_queue = item;
- else
- dwarf2_queue_tail->next = item;
+ /* Store the function that reads in the rest of the symbol table. */
+ pst->read_symtab = dwarf2_psymtab_to_symtab;
- dwarf2_queue_tail = item;
-}
+ this_cu->v.psymtab = pst;
-/* Process the queue. */
+ dwarf2_find_base_address (comp_unit_die, &cu);
-static void
-process_queue (struct objfile *objfile)
-{
- struct dwarf2_queue_item *item, *next_item;
+ /* Possibly set the default values of LOWPC and HIGHPC from
+ `DW_AT_ranges'. */
+ has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc,
+ &best_highpc, &cu, pst);
+ if (has_pc_info == 1 && best_lowpc < best_highpc)
+ /* Store the contiguous range if it is not empty; it can be empty for
+ CUs with no code. */
+ addrmap_set_empty (objfile->psymtabs_addrmap,
+ best_lowpc + baseaddr,
+ best_highpc + baseaddr - 1, pst);
- /* The queue starts out with one item, but following a DIE reference
- may load a new CU, adding it to the end of the queue. */
- for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
+ /* Check if comp unit has_children.
+ If so, read the rest of the partial symbols from this comp unit.
+ If not, there's no more debug_info for this comp unit. */
+ if (has_children)
{
- if (item->per_cu->psymtab && !item->per_cu->psymtab->readin)
- process_full_comp_unit (item->per_cu);
+ struct partial_die_info *first_die;
+ CORE_ADDR lowpc, highpc;
- item->per_cu->queued = 0;
- next_item = item->next;
- xfree (item);
- }
+ lowpc = ((CORE_ADDR) -1);
+ highpc = ((CORE_ADDR) 0);
- dwarf2_queue_tail = NULL;
-}
+ first_die = load_partial_dies (abfd, buffer, info_ptr, 1, &cu);
-/* Free all allocated queue entries. This function only releases anything if
- an error was thrown; if the queue was processed then it would have been
- freed as we went along. */
+ scan_partial_symbols (first_die, &lowpc, &highpc,
+ ! has_pc_info, &cu);
-static void
-dwarf2_release_queue (void *dummy)
-{
- struct dwarf2_queue_item *item, *last;
+ /* If we didn't find a lowpc, set it to highpc to avoid
+ complaints from `maint check'. */
+ if (lowpc == ((CORE_ADDR) -1))
+ lowpc = highpc;
- item = dwarf2_queue;
- while (item)
- {
- /* Anything still marked queued is likely to be in an
- inconsistent state, so discard it. */
- if (item->per_cu->queued)
+ /* If the compilation unit didn't have an explicit address range,
+ then use the information extracted from its child dies. */
+ if (! has_pc_info)
{
- if (item->per_cu->cu != NULL)
- free_one_cached_comp_unit (item->per_cu->cu);
- item->per_cu->queued = 0;
+ best_lowpc = lowpc;
+ best_highpc = highpc;
}
+ }
+ pst->textlow = best_lowpc + baseaddr;
+ pst->texthigh = best_highpc + baseaddr;
- last = item;
- item = item->next;
- xfree (last);
+ pst->n_global_syms = objfile->global_psymbols.next -
+ (objfile->global_psymbols.list + pst->globals_offset);
+ pst->n_static_syms = objfile->static_psymbols.next -
+ (objfile->static_psymbols.list + pst->statics_offset);
+ sort_pst_symbols (pst);
+
+ info_ptr = (beg_of_comp_unit + cu.header.length
+ + cu.header.initial_length_size);
+
+ if (this_cu->from_debug_types)
+ {
+ /* It's not clear we want to do anything with stmt lists here.
+ Waiting to see what gcc ultimately does. */
+ }
+ else
+ {
+ /* Get the list of files included in the current compilation unit,
+ and build a psymtab for each of them. */
+ dwarf2_build_include_psymtabs (&cu, comp_unit_die, pst);
}
- dwarf2_queue = dwarf2_queue_tail = NULL;
+ do_cleanups (back_to_inner);
+
+ return info_ptr;
}
-/* Read in full symbols for PST, and anything it depends on. */
+/* Traversal function for htab_traverse_noresize.
+ Process one .debug_types comp-unit. */
-static void
-psymtab_to_symtab_1 (struct partial_symtab *pst)
+static int
+process_type_comp_unit (void **slot, void *info)
{
- struct dwarf2_per_cu_data *per_cu;
- struct cleanup *back_to;
- int i;
+ struct signatured_type *entry = (struct signatured_type *) *slot;
+ struct objfile *objfile = (struct objfile *) info;
+ struct dwarf2_per_cu_data *this_cu;
- for (i = 0; i < pst->number_of_dependencies; i++)
- if (!pst->dependencies[i]->readin)
- {
- /* Inform about additional files that need to be read in. */
- if (info_verbose)
- {
- /* FIXME: i18n: Need to make this a single string. */
- fputs_filtered (" ", gdb_stdout);
- wrap_here ("");
- fputs_filtered ("and ", gdb_stdout);
- wrap_here ("");
- printf_filtered ("%s...", pst->dependencies[i]->filename);
- wrap_here (""); /* Flush output */
- gdb_flush (gdb_stdout);
- }
- psymtab_to_symtab_1 (pst->dependencies[i]);
- }
+ this_cu = &entry->per_cu;
- per_cu = pst->read_symtab_private;
+ gdb_assert (dwarf2_per_objfile->types.readin);
+ process_psymtab_comp_unit (objfile, this_cu,
+ dwarf2_per_objfile->types.buffer,
+ dwarf2_per_objfile->types.buffer + entry->offset,
+ dwarf2_per_objfile->types.size);
- if (per_cu == NULL)
- {
- /* It's an include file, no symbols to read for it.
- Everything is in the parent symtab. */
- pst->readin = 1;
- return;
- }
+ return 1;
+}
- back_to = make_cleanup (dwarf2_release_queue, NULL);
+/* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
+ Build partial symbol tables for the .debug_types comp-units. */
- queue_comp_unit (per_cu, pst->objfile);
+static void
+build_type_psymtabs (struct objfile *objfile)
+{
+ if (! create_debug_types_hash_table (objfile))
+ return;
- if (per_cu->from_debug_types)
- read_signatured_type_at_offset (pst->objfile, per_cu->offset);
- else
- load_full_comp_unit (per_cu, pst->objfile);
+ htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
+ process_type_comp_unit, objfile);
+}
- process_queue (pst->objfile);
+/* A cleanup function that clears objfile's psymtabs_addrmap field. */
- /* Age the cache, releasing compilation units that have not
- been used recently. */
- age_cached_comp_units ();
+static void
+psymtabs_addrmap_cleanup (void *o)
+{
+ struct objfile *objfile = o;
- do_cleanups (back_to);
+ objfile->psymtabs_addrmap = NULL;
}
-/* Load the DIEs associated with PER_CU into memory. */
+/* Build the partial symbol table by doing a quick pass through the
+ .debug_info and .debug_abbrev sections. */
static void
-load_full_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
+dwarf2_build_psymtabs_hard (struct objfile *objfile)
{
- bfd *abfd = objfile->obfd;
- struct dwarf2_cu *cu;
- unsigned int offset;
- gdb_byte *info_ptr, *beg_of_comp_unit;
- struct cleanup *back_to, *free_cu_cleanup;
- struct attribute *attr;
-
- gdb_assert (! per_cu->from_debug_types);
+ gdb_byte *info_ptr;
+ struct cleanup *back_to, *addrmap_cleanup;
+ struct obstack temp_obstack;
- /* Set local variables from the partial symbol table info. */
- offset = per_cu->offset;
+ dwarf2_per_objfile->reading_partial_symbols = 1;
dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
- info_ptr = dwarf2_per_objfile->info.buffer + offset;
- beg_of_comp_unit = info_ptr;
+ info_ptr = dwarf2_per_objfile->info.buffer;
- cu = alloc_one_comp_unit (objfile);
+ /* Any cached compilation units will be linked by the per-objfile
+ read_in_chain. Make sure to free them when we're done. */
+ back_to = make_cleanup (free_cached_comp_units, NULL);
- /* If an error occurs while loading, release our storage. */
- free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
+ build_type_psymtabs (objfile);
- /* Read in the comp_unit header. */
- info_ptr = read_comp_unit_head (&cu->header, info_ptr, abfd);
+ create_all_comp_units (objfile);
- /* Complete the cu_header. */
- cu->header.offset = offset;
- cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
+ /* Create a temporary address map on a temporary obstack. We later
+ copy this to the final obstack. */
+ obstack_init (&temp_obstack);
+ make_cleanup_obstack_free (&temp_obstack);
+ objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack);
+ addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile);
- /* Read the abbrevs for this compilation unit. */
- dwarf2_read_abbrevs (abfd, cu);
- back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
+ /* Since the objects we're extracting from .debug_info vary in
+ length, only the individual functions to extract them (like
+ read_comp_unit_head and load_partial_die) can really know whether
+ the buffer is large enough to hold another complete object.
- /* Link this compilation unit into the compilation unit tree. */
- per_cu->cu = cu;
- cu->per_cu = per_cu;
- cu->type_hash = per_cu->type_hash;
+ At the moment, they don't actually check that. If .debug_info
+ holds just one extra byte after the last compilation unit's dies,
+ then read_comp_unit_head will happily read off the end of the
+ buffer. read_partial_die is similarly casual. Those functions
+ should be fixed.
- cu->dies = read_comp_unit (info_ptr, cu);
+ For this loop condition, simply checking whether there's any data
+ left at all should be sufficient. */
- /* We try not to read any attributes in this function, because not
- all objfiles needed for references have been loaded yet, and symbol
- table processing isn't initialized. But we have to set the CU language,
- or we won't be able to build types correctly. */
- attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
- if (attr)
- set_cu_language (DW_UNSND (attr), cu);
- else
- set_cu_language (language_minimal, cu);
+ while (info_ptr < (dwarf2_per_objfile->info.buffer
+ + dwarf2_per_objfile->info.size))
+ {
+ struct dwarf2_per_cu_data *this_cu;
- /* Similarly, if we do not read the producer, we can not apply
- producer-specific interpretation. */
- attr = dwarf2_attr (cu->dies, DW_AT_producer, cu);
- if (attr)
- cu->producer = DW_STRING (attr);
+ this_cu = dwarf2_find_comp_unit (info_ptr
+ - dwarf2_per_objfile->info.buffer,
+ objfile);
+
+ info_ptr = process_psymtab_comp_unit (objfile, this_cu,
+ dwarf2_per_objfile->info.buffer,
+ info_ptr,
+ dwarf2_per_objfile->info.size);
+ }
- /* Link this CU into read_in_chain. */
- per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
- dwarf2_per_objfile->read_in_chain = per_cu;
+ objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
+ &objfile->objfile_obstack);
+ discard_cleanups (addrmap_cleanup);
do_cleanups (back_to);
-
- /* We've successfully allocated this compilation unit. Let our caller
- clean it up when finished with it. */
- discard_cleanups (free_cu_cleanup);
}
-/* Generate full symbol information for PST and CU, whose DIEs have
- already been loaded into memory. */
+/* Load the partial DIEs for a secondary CU into memory. */
static void
-process_full_comp_unit (struct dwarf2_per_cu_data *per_cu)
+load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu,
+ struct objfile *objfile)
{
- struct partial_symtab *pst = per_cu->psymtab;
- struct dwarf2_cu *cu = per_cu->cu;
- struct objfile *objfile = pst->objfile;
- CORE_ADDR lowpc, highpc;
- struct symtab *symtab;
- struct cleanup *back_to;
- CORE_ADDR baseaddr;
+ bfd *abfd = objfile->obfd;
+ gdb_byte *info_ptr, *beg_of_comp_unit;
+ struct die_info *comp_unit_die;
+ struct dwarf2_cu *cu;
+ struct cleanup *free_abbrevs_cleanup, *free_cu_cleanup = NULL;
+ int has_children;
+ struct die_reader_specs reader_specs;
+ int read_cu = 0;
- baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+ gdb_assert (! this_cu->from_debug_types);
- buildsym_init ();
- back_to = make_cleanup (really_free_pendings, NULL);
+ gdb_assert (dwarf2_per_objfile->info.readin);
+ info_ptr = dwarf2_per_objfile->info.buffer + this_cu->offset;
+ beg_of_comp_unit = info_ptr;
- cu->list_in_scope = &file_symbols;
+ if (this_cu->cu == NULL)
+ {
+ cu = xmalloc (sizeof (*cu));
+ init_one_comp_unit (cu, objfile);
- dwarf2_find_base_address (cu->dies, cu);
+ read_cu = 1;
- /* Do line number decoding in read_file_scope () */
- process_die (cu->dies, cu);
+ /* If an error occurs while loading, release our storage. */
+ free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
- /* Some compilers don't define a DW_AT_high_pc attribute for the
- compilation unit. If the DW_AT_high_pc is missing, synthesize
- it, by scanning the DIE's below the compilation unit. */
- get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
+ info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr,
+ dwarf2_per_objfile->info.buffer,
+ dwarf2_per_objfile->info.size,
+ abfd);
- symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
+ /* Complete the cu_header. */
+ cu->header.offset = this_cu->offset;
+ cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
- /* Set symtab language to language from DW_AT_language.
- If the compilation is from a C file generated by language preprocessors,
- do not set the language if it was already deduced by start_subfile. */
- if (symtab != NULL
- && !(cu->language == language_c && symtab->language != language_c))
+ /* Link this compilation unit into the compilation unit tree. */
+ this_cu->cu = cu;
+ cu->per_cu = this_cu;
+
+ /* Link this CU into read_in_chain. */
+ this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
+ dwarf2_per_objfile->read_in_chain = this_cu;
+ }
+ else
{
- symtab->language = cu->language;
+ cu = this_cu->cu;
+ info_ptr += cu->header.first_die_offset;
}
- pst->symtab = symtab;
- pst->readin = 1;
- do_cleanups (back_to);
-}
+ /* Read the abbrevs for this compilation unit into a table. */
+ gdb_assert (cu->dwarf2_abbrevs == NULL);
+ dwarf2_read_abbrevs (abfd, cu);
+ free_abbrevs_cleanup = make_cleanup (dwarf2_free_abbrev_table, cu);
-/* Process a die and its children. */
+ /* Read the compilation unit die. */
+ init_cu_die_reader (&reader_specs, cu);
+ info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
+ &has_children);
-static void
-process_die (struct die_info *die, struct dwarf2_cu *cu)
-{
- switch (die->tag)
- {
- case DW_TAG_padding:
- break;
- case DW_TAG_compile_unit:
- read_file_scope (die, cu);
- break;
- case DW_TAG_type_unit:
- read_type_unit_scope (die, cu);
- break;
- case DW_TAG_subprogram:
- case DW_TAG_inlined_subroutine:
- read_func_scope (die, cu);
- break;
- case DW_TAG_lexical_block:
- case DW_TAG_try_block:
- case DW_TAG_catch_block:
- read_lexical_block_scope (die, cu);
- break;
- case DW_TAG_class_type:
- case DW_TAG_interface_type:
- case DW_TAG_structure_type:
- case DW_TAG_union_type:
- process_structure_scope (die, cu);
- break;
- case DW_TAG_enumeration_type:
- process_enumeration_scope (die, cu);
- break;
+ prepare_one_comp_unit (cu, comp_unit_die);
- /* These dies have a type, but processing them does not create
- a symbol or recurse to process the children. Therefore we can
- read them on-demand through read_type_die. */
- case DW_TAG_subroutine_type:
- case DW_TAG_set_type:
- case DW_TAG_array_type:
- case DW_TAG_pointer_type:
- case DW_TAG_ptr_to_member_type:
- case DW_TAG_reference_type:
- case DW_TAG_string_type:
- break;
+ /* Check if comp unit has_children.
+ If so, read the rest of the partial symbols from this comp unit.
+ If not, there's no more debug_info for this comp unit. */
+ if (has_children)
+ load_partial_dies (abfd, dwarf2_per_objfile->info.buffer, info_ptr, 0, cu);
- case DW_TAG_base_type:
- case DW_TAG_subrange_type:
- case DW_TAG_typedef:
- case DW_TAG_const_type:
- case DW_TAG_volatile_type:
- /* Add a typedef symbol for the type definition, if it has a
- DW_AT_name. */
- new_symbol (die, read_type_die (die, cu), cu);
- break;
- case DW_TAG_common_block:
- read_common_block (die, cu);
- break;
- case DW_TAG_common_inclusion:
- break;
- case DW_TAG_namespace:
- processing_has_namespace_info = 1;
- read_namespace (die, cu);
- break;
- case DW_TAG_module:
- processing_has_namespace_info = 1;
- read_module (die, cu);
- break;
- case DW_TAG_imported_declaration:
- case DW_TAG_imported_module:
- processing_has_namespace_info = 1;
- if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
- || cu->language != language_fortran))
- complaint (&symfile_complaints, _("Tag '%s' has unexpected children"),
- dwarf_tag_name (die->tag));
- read_import_statement (die, cu);
- break;
- default:
- new_symbol (die, NULL, cu);
- break;
+ do_cleanups (free_abbrevs_cleanup);
+
+ if (read_cu)
+ {
+ /* We've successfully allocated this compilation unit. Let our
+ caller clean it up when finished with it. */
+ discard_cleanups (free_cu_cleanup);
}
}
-/* A helper function for dwarf2_compute_name which determines whether DIE
- needs to have the name of the scope prepended to the name listed in the
- die. */
+/* Create a list of all compilation units in OBJFILE. We do this only
+ if an inter-comp-unit reference is found; presumably if there is one,
+ there will be many, and one will occur early in the .debug_info section.
+ So there's no point in building this list incrementally. */
-static int
-die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu)
+static void
+create_all_comp_units (struct objfile *objfile)
{
- struct attribute *attr;
+ int n_allocated;
+ int n_comp_units;
+ struct dwarf2_per_cu_data **all_comp_units;
+ gdb_byte *info_ptr;
- switch (die->tag)
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
+ info_ptr = dwarf2_per_objfile->info.buffer;
+
+ n_comp_units = 0;
+ n_allocated = 10;
+ all_comp_units = xmalloc (n_allocated
+ * sizeof (struct dwarf2_per_cu_data *));
+
+ while (info_ptr < dwarf2_per_objfile->info.buffer
+ + dwarf2_per_objfile->info.size)
{
- case DW_TAG_namespace:
- case DW_TAG_typedef:
- case DW_TAG_class_type:
- case DW_TAG_interface_type:
- case DW_TAG_structure_type:
- case DW_TAG_union_type:
- case DW_TAG_enumeration_type:
- case DW_TAG_enumerator:
- case DW_TAG_subprogram:
- case DW_TAG_member:
- return 1;
+ unsigned int length, initial_length_size;
+ struct dwarf2_per_cu_data *this_cu;
+ unsigned int offset;
- case DW_TAG_variable:
- /* We only need to prefix "globally" visible variables. These include
- any variable marked with DW_AT_external or any variable that
- lives in a namespace. [Variables in anonymous namespaces
- require prefixing, but they are not DW_AT_external.] */
+ offset = info_ptr - dwarf2_per_objfile->info.buffer;
- if (dwarf2_attr (die, DW_AT_specification, cu))
- {
- struct dwarf2_cu *spec_cu = cu;
+ /* Read just enough information to find out where the next
+ compilation unit is. */
+ length = read_initial_length (objfile->obfd, info_ptr,
+ &initial_length_size);
- return die_needs_namespace (die_specification (die, &spec_cu),
- spec_cu);
- }
+ /* Save the compilation unit for later lookup. */
+ this_cu = obstack_alloc (&objfile->objfile_obstack,
+ sizeof (struct dwarf2_per_cu_data));
+ memset (this_cu, 0, sizeof (*this_cu));
+ this_cu->offset = offset;
+ this_cu->length = length + initial_length_size;
+ this_cu->objfile = objfile;
- attr = dwarf2_attr (die, DW_AT_external, cu);
- if (attr == NULL && die->parent->tag != DW_TAG_namespace
- && die->parent->tag != DW_TAG_module)
- return 0;
- /* A variable in a lexical block of some kind does not need a
- namespace, even though in C++ such variables may be external
- and have a mangled name. */
- if (die->parent->tag == DW_TAG_lexical_block
- || die->parent->tag == DW_TAG_try_block
- || die->parent->tag == DW_TAG_catch_block
- || die->parent->tag == DW_TAG_subprogram)
- return 0;
- return 1;
+ if (n_comp_units == n_allocated)
+ {
+ n_allocated *= 2;
+ all_comp_units = xrealloc (all_comp_units,
+ n_allocated
+ * sizeof (struct dwarf2_per_cu_data *));
+ }
+ all_comp_units[n_comp_units++] = this_cu;
- default:
- return 0;
+ info_ptr = info_ptr + this_cu->length;
}
-}
-
-/* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
- compute the physname for the object, which include a method's
- formal parameters (C++/Java) and return type (Java).
- For Ada, return the DIE's linkage name rather than the fully qualified
- name. PHYSNAME is ignored..
+ dwarf2_per_objfile->all_comp_units
+ = obstack_alloc (&objfile->objfile_obstack,
+ n_comp_units * sizeof (struct dwarf2_per_cu_data *));
+ memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
+ n_comp_units * sizeof (struct dwarf2_per_cu_data *));
+ xfree (all_comp_units);
+ dwarf2_per_objfile->n_comp_units = n_comp_units;
+}
- The result is allocated on the objfile_obstack and canonicalized. */
+/* Process all loaded DIEs for compilation unit CU, starting at
+ FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
+ unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
+ DW_AT_ranges). If NEED_PC is set, then this function will set
+ *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
+ and record the covered ranges in the addrmap. */
-static const char *
-dwarf2_compute_name (char *name, struct die_info *die, struct dwarf2_cu *cu,
- int physname)
+static void
+scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
+ CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
{
- if (name == NULL)
- name = dwarf2_name (die, cu);
+ struct partial_die_info *pdi;
- /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
- compute it by typename_concat inside GDB. */
- if (cu->language == language_ada
- || (cu->language == language_fortran && physname))
- {
- /* For Ada unit, we prefer the linkage name over the name, as
- the former contains the exported name, which the user expects
- to be able to reference. Ideally, we want the user to be able
- to reference this entity using either natural or linkage name,
- but we haven't started looking at this enhancement yet. */
- struct attribute *attr;
+ /* Now, march along the PDI's, descending into ones which have
+ interesting children but skipping the children of the other ones,
+ until we reach the end of the compilation unit. */
- attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
- if (attr == NULL)
- attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
- if (attr && DW_STRING (attr))
- return DW_STRING (attr);
- }
+ pdi = first_die;
- /* These are the only languages we know how to qualify names in. */
- if (name != NULL
- && (cu->language == language_cplus || cu->language == language_java
- || cu->language == language_fortran))
+ while (pdi != NULL)
{
- if (die_needs_namespace (die, cu))
- {
- long length;
- char *prefix;
- struct ui_file *buf;
-
- prefix = determine_prefix (die, cu);
- buf = mem_fileopen ();
- if (*prefix != '\0')
- {
- char *prefixed_name = typename_concat (NULL, prefix, name,
- physname, cu);
-
- fputs_unfiltered (prefixed_name, buf);
- xfree (prefixed_name);
- }
- else
- fputs_unfiltered (name ? name : "", buf);
+ fixup_partial_die (pdi, cu);
- /* For Java and C++ methods, append formal parameter type
- information, if PHYSNAME. */
+ /* Anonymous namespaces or modules have no name but have interesting
+ children, so we need to look at them. Ditto for anonymous
+ enums. */
- if (physname && die->tag == DW_TAG_subprogram
- && (cu->language == language_cplus
- || cu->language == language_java))
+ if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
+ || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type)
+ {
+ switch (pdi->tag)
{
- struct type *type = read_type_die (die, cu);
-
- c_type_print_args (type, buf, 0, cu->language);
-
- if (cu->language == language_java)
+ case DW_TAG_subprogram:
+ add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
+ break;
+ case DW_TAG_constant:
+ case DW_TAG_variable:
+ case DW_TAG_typedef:
+ case DW_TAG_union_type:
+ if (!pdi->is_declaration)
{
- /* For java, we must append the return type to method
- names. */
- if (die->tag == DW_TAG_subprogram)
- java_print_type (TYPE_TARGET_TYPE (type), "", buf,
- 0, 0);
+ add_partial_symbol (pdi, cu);
}
- else if (cu->language == language_cplus)
+ break;
+ case DW_TAG_class_type:
+ case DW_TAG_interface_type:
+ case DW_TAG_structure_type:
+ if (!pdi->is_declaration)
{
- if (TYPE_NFIELDS (type) > 0
- && TYPE_FIELD_ARTIFICIAL (type, 0)
- && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 0))))
- fputs_unfiltered (" const", buf);
+ add_partial_symbol (pdi, cu);
}
+ break;
+ case DW_TAG_enumeration_type:
+ if (!pdi->is_declaration)
+ add_partial_enumeration (pdi, cu);
+ break;
+ case DW_TAG_base_type:
+ case DW_TAG_subrange_type:
+ /* File scope base type definitions are added to the partial
+ symbol table. */
+ add_partial_symbol (pdi, cu);
+ break;
+ case DW_TAG_namespace:
+ add_partial_namespace (pdi, lowpc, highpc, need_pc, cu);
+ break;
+ case DW_TAG_module:
+ add_partial_module (pdi, lowpc, highpc, need_pc, cu);
+ break;
+ default:
+ break;
}
+ }
- name = ui_file_obsavestring (buf, &cu->objfile->objfile_obstack,
- &length);
- ui_file_delete (buf);
-
- if (cu->language == language_cplus)
- {
- char *cname
- = dwarf2_canonicalize_name (name, cu,
- &cu->objfile->objfile_obstack);
+ /* If the die has a sibling, skip to the sibling. */
- if (cname != NULL)
- name = cname;
- }
- }
+ pdi = pdi->die_sibling;
}
-
- return name;
}
-/* Return the fully qualified name of DIE, based on its DW_AT_name.
- If scope qualifiers are appropriate they will be added. The result
- will be allocated on the objfile_obstack, or NULL if the DIE does
- not have a name. NAME may either be from a previous call to
- dwarf2_name or NULL.
+/* Functions used to compute the fully scoped name of a partial DIE.
- The output string will be canonicalized (if C++/Java). */
+ Normally, this is simple. For C++, the parent DIE's fully scoped
+ name is concatenated with "::" and the partial DIE's name. For
+ Java, the same thing occurs except that "." is used instead of "::".
+ Enumerators are an exception; they use the scope of their parent
+ enumeration type, i.e. the name of the enumeration type is not
+ prepended to the enumerator.
-static const char *
-dwarf2_full_name (char *name, struct die_info *die, struct dwarf2_cu *cu)
+ There are two complexities. One is DW_AT_specification; in this
+ case "parent" means the parent of the target of the specification,
+ instead of the direct parent of the DIE. The other is compilers
+ which do not emit DW_TAG_namespace; in this case we try to guess
+ the fully qualified name of structure types from their members'
+ linkage names. This must be done using the DIE's children rather
+ than the children of any DW_AT_specification target. We only need
+ to do this for structures at the top level, i.e. if the target of
+ any DW_AT_specification (if any; otherwise the DIE itself) does not
+ have a parent. */
+
+/* Compute the scope prefix associated with PDI's parent, in
+ compilation unit CU. The result will be allocated on CU's
+ comp_unit_obstack, or a copy of the already allocated PDI->NAME
+ field. NULL is returned if no prefix is necessary. */
+static char *
+partial_die_parent_scope (struct partial_die_info *pdi,
+ struct dwarf2_cu *cu)
{
- return dwarf2_compute_name (name, die, cu, 0);
-}
+ char *grandparent_scope;
+ struct partial_die_info *parent, *real_pdi;
-/* Construct a physname for the given DIE in CU. NAME may either be
- from a previous call to dwarf2_name or NULL. The result will be
- allocated on the objfile_objstack or NULL if the DIE does not have a
- name.
+ /* We need to look at our parent DIE; if we have a DW_AT_specification,
+ then this means the parent of the specification DIE. */
- The output string will be canonicalized (if C++/Java). */
+ real_pdi = pdi;
+ while (real_pdi->has_specification)
+ real_pdi = find_partial_die (real_pdi->spec_offset, cu);
-static const char *
-dwarf2_physname (char *name, struct die_info *die, struct dwarf2_cu *cu)
-{
- return dwarf2_compute_name (name, die, cu, 1);
-}
+ parent = real_pdi->die_parent;
+ if (parent == NULL)
+ return NULL;
-/* Read the import statement specified by the given die and record it. */
+ if (parent->scope_set)
+ return parent->scope;
-static void
-read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
-{
- struct attribute *import_attr;
- struct die_info *imported_die;
- struct dwarf2_cu *imported_cu;
- const char *imported_name;
- const char *imported_name_prefix;
- const char *canonical_name;
- const char *import_alias;
- const char *imported_declaration = NULL;
- const char *import_prefix;
+ fixup_partial_die (parent, cu);
- char *temp;
+ grandparent_scope = partial_die_parent_scope (parent, cu);
- import_attr = dwarf2_attr (die, DW_AT_import, cu);
- if (import_attr == NULL)
+ /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
+ DW_TAG_namespace DIEs with a name of "::" for the global namespace.
+ Work around this problem here. */
+ if (cu->language == language_cplus
+ && parent->tag == DW_TAG_namespace
+ && strcmp (parent->name, "::") == 0
+ && grandparent_scope == NULL)
{
- complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
- dwarf_tag_name (die->tag));
- return;
+ parent->scope = NULL;
+ parent->scope_set = 1;
+ return NULL;
}
- imported_cu = cu;
- imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu);
- imported_name = dwarf2_name (imported_die, imported_cu);
- if (imported_name == NULL)
+ if (parent->tag == DW_TAG_namespace
+ || parent->tag == DW_TAG_module
+ || parent->tag == DW_TAG_structure_type
+ || parent->tag == DW_TAG_class_type
+ || parent->tag == DW_TAG_interface_type
+ || parent->tag == DW_TAG_union_type
+ || parent->tag == DW_TAG_enumeration_type)
{
- /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
-
- The import in the following code:
- namespace A
- {
- typedef int B;
- }
-
- int main ()
- {
- using A::B;
- B b;
- return b;
- }
+ if (grandparent_scope == NULL)
+ parent->scope = parent->name;
+ else
+ parent->scope = typename_concat (&cu->comp_unit_obstack,
+ grandparent_scope,
+ parent->name, 0, cu);
+ }
+ else if (parent->tag == DW_TAG_enumerator)
+ /* Enumerators should not get the name of the enumeration as a prefix. */
+ parent->scope = grandparent_scope;
+ else
+ {
+ /* FIXME drow/2004-04-01: What should we be doing with
+ function-local names? For partial symbols, we should probably be
+ ignoring them. */
+ complaint (&symfile_complaints,
+ _("unhandled containing DIE tag %d for DIE at %d"),
+ parent->tag, pdi->offset);
+ parent->scope = grandparent_scope;
+ }
- ...
- <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
- <52> DW_AT_decl_file : 1
- <53> DW_AT_decl_line : 6
- <54> DW_AT_import : <0x75>
- <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
- <59> DW_AT_name : B
- <5b> DW_AT_decl_file : 1
- <5c> DW_AT_decl_line : 2
- <5d> DW_AT_type : <0x6e>
- ...
- <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
- <76> DW_AT_byte_size : 4
- <77> DW_AT_encoding : 5 (signed)
+ parent->scope_set = 1;
+ return parent->scope;
+}
- imports the wrong die ( 0x75 instead of 0x58 ).
- This case will be ignored until the gcc bug is fixed. */
- return;
- }
+/* Return the fully scoped name associated with PDI, from compilation unit
+ CU. The result will be allocated with malloc. */
+static char *
+partial_die_full_name (struct partial_die_info *pdi,
+ struct dwarf2_cu *cu)
+{
+ char *parent_scope;
- /* Figure out the local name after import. */
- import_alias = dwarf2_name (die, cu);
+ /* If this is a template instantiation, we can not work out the
+ template arguments from partial DIEs. So, unfortunately, we have
+ to go through the full DIEs. At least any work we do building
+ types here will be reused if full symbols are loaded later. */
+ if (pdi->has_template_arguments)
+ {
+ fixup_partial_die (pdi, cu);
- /* Figure out where the statement is being imported to. */
- import_prefix = determine_prefix (die, cu);
+ if (pdi->name != NULL && strchr (pdi->name, '<') == NULL)
+ {
+ struct die_info *die;
+ struct attribute attr;
+ struct dwarf2_cu *ref_cu = cu;
- /* Figure out what the scope of the imported die is and prepend it
- to the name of the imported die. */
- imported_name_prefix = determine_prefix (imported_die, imported_cu);
+ attr.name = 0;
+ attr.form = DW_FORM_ref_addr;
+ attr.u.addr = pdi->offset;
+ die = follow_die_ref (NULL, &attr, &ref_cu);
- if (imported_die->tag != DW_TAG_namespace
- && imported_die->tag != DW_TAG_module)
- {
- imported_declaration = imported_name;
- canonical_name = imported_name_prefix;
- }
- else if (strlen (imported_name_prefix) > 0)
- {
- temp = alloca (strlen (imported_name_prefix)
- + 2 + strlen (imported_name) + 1);
- strcpy (temp, imported_name_prefix);
- strcat (temp, "::");
- strcat (temp, imported_name);
- canonical_name = temp;
+ return xstrdup (dwarf2_full_name (NULL, die, ref_cu));
+ }
}
- else
- canonical_name = imported_name;
- cp_add_using_directive (import_prefix,
- canonical_name,
- import_alias,
- imported_declaration,
- &cu->objfile->objfile_obstack);
+ parent_scope = partial_die_parent_scope (pdi, cu);
+ if (parent_scope == NULL)
+ return NULL;
+ else
+ return typename_concat (NULL, parent_scope, pdi->name, 0, cu);
}
static void
-initialize_cu_func_list (struct dwarf2_cu *cu)
-{
- cu->first_fn = cu->last_fn = cu->cached_fn = NULL;
-}
-
-static void
-free_cu_line_header (void *arg)
-{
- struct dwarf2_cu *cu = arg;
-
- free_line_header (cu->line_header);
- cu->line_header = NULL;
-}
-
-static void
-read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
+add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
- struct cleanup *back_to = make_cleanup (null_cleanup, 0);
- CORE_ADDR lowpc = ((CORE_ADDR) -1);
- CORE_ADDR highpc = ((CORE_ADDR) 0);
- struct attribute *attr;
- char *name = NULL;
- char *comp_dir = NULL;
- struct die_info *child_die;
- bfd *abfd = objfile->obfd;
- struct line_header *line_header = 0;
+ CORE_ADDR addr = 0;
+ char *actual_name = NULL;
+ const struct partial_symbol *psym = NULL;
CORE_ADDR baseaddr;
+ int built_actual_name = 0;
baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
- get_scope_pc_bounds (die, &lowpc, &highpc, cu);
+ actual_name = partial_die_full_name (pdi, cu);
+ if (actual_name)
+ built_actual_name = 1;
- /* If we didn't find a lowpc, set it to highpc to avoid complaints
- from finish_block. */
- if (lowpc == ((CORE_ADDR) -1))
- lowpc = highpc;
- lowpc += baseaddr;
- highpc += baseaddr;
+ if (actual_name == NULL)
+ actual_name = pdi->name;
- /* Find the filename. Do not use dwarf2_name here, since the filename
- is not a source language identifier. */
- attr = dwarf2_attr (die, DW_AT_name, cu);
- if (attr)
+ switch (pdi->tag)
{
- name = DW_STRING (attr);
- }
+ case DW_TAG_subprogram:
+ if (pdi->is_external || cu->language == language_ada)
+ {
+ /* brobecker/2007-12-26: Normally, only "external" DIEs are part
+ of the global scope. But in Ada, we want to be able to access
+ nested procedures globally. So all Ada subprograms are stored
+ in the global scope. */
+ /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
+ mst_text, objfile); */
+ add_psymbol_to_list (actual_name, strlen (actual_name),
+ built_actual_name,
+ VAR_DOMAIN, LOC_BLOCK,
+ &objfile->global_psymbols,
+ 0, pdi->lowpc + baseaddr,
+ cu->language, objfile);
+ }
+ else
+ {
+ /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
+ mst_file_text, objfile); */
+ add_psymbol_to_list (actual_name, strlen (actual_name),
+ built_actual_name,
+ VAR_DOMAIN, LOC_BLOCK,
+ &objfile->static_psymbols,
+ 0, pdi->lowpc + baseaddr,
+ cu->language, objfile);
+ }
+ break;
+ case DW_TAG_constant:
+ {
+ struct psymbol_allocation_list *list;
- attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
- if (attr)
- comp_dir = DW_STRING (attr);
- else if (name != NULL && IS_ABSOLUTE_PATH (name))
- {
- comp_dir = ldirname (name);
- if (comp_dir != NULL)
- make_cleanup (xfree, comp_dir);
- }
- if (comp_dir != NULL)
- {
- /* Irix 6.2 native cc prepends <machine>.: to the compilation
- directory, get rid of it. */
- char *cp = strchr (comp_dir, ':');
+ if (pdi->is_external)
+ list = &objfile->global_psymbols;
+ else
+ list = &objfile->static_psymbols;
+ add_psymbol_to_list (actual_name, strlen (actual_name),
+ built_actual_name, VAR_DOMAIN, LOC_STATIC,
+ list, 0, 0, cu->language, objfile);
+ }
+ break;
+ case DW_TAG_variable:
+ if (pdi->locdesc)
+ addr = decode_locdesc (pdi->locdesc, cu);
- if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
- comp_dir = cp + 1;
- }
+ if (pdi->locdesc
+ && addr == 0
+ && !dwarf2_per_objfile->has_section_at_zero)
+ {
+ /* A global or static variable may also have been stripped
+ out by the linker if unused, in which case its address
+ will be nullified; do not add such variables into partial
+ symbol table then. */
+ }
+ else if (pdi->is_external)
+ {
+ /* Global Variable.
+ Don't enter into the minimal symbol tables as there is
+ a minimal symbol table entry from the ELF symbols already.
+ Enter into partial symbol table if it has a location
+ descriptor or a type.
+ If the location descriptor is missing, new_symbol will create
+ a LOC_UNRESOLVED symbol, the address of the variable will then
+ be determined from the minimal symbol table whenever the variable
+ is referenced.
+ The address for the partial symbol table entry is not
+ used by GDB, but it comes in handy for debugging partial symbol
+ table building. */
- if (name == NULL)
- name = "<unknown>";
+ if (pdi->locdesc || pdi->has_type)
+ add_psymbol_to_list (actual_name, strlen (actual_name),
+ built_actual_name,
+ VAR_DOMAIN, LOC_STATIC,
+ &objfile->global_psymbols,
+ 0, addr + baseaddr,
+ cu->language, objfile);
+ }
+ else
+ {
+ /* Static Variable. Skip symbols without location descriptors. */
+ if (pdi->locdesc == NULL)
+ {
+ if (built_actual_name)
+ xfree (actual_name);
+ return;
+ }
+ /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
+ mst_file_data, objfile); */
+ add_psymbol_to_list (actual_name, strlen (actual_name),
+ built_actual_name,
+ VAR_DOMAIN, LOC_STATIC,
+ &objfile->static_psymbols,
+ 0, addr + baseaddr,
+ cu->language, objfile);
+ }
+ break;
+ case DW_TAG_typedef:
+ case DW_TAG_base_type:
+ case DW_TAG_subrange_type:
+ add_psymbol_to_list (actual_name, strlen (actual_name),
+ built_actual_name,
+ VAR_DOMAIN, LOC_TYPEDEF,
+ &objfile->static_psymbols,
+ 0, (CORE_ADDR) 0, cu->language, objfile);
+ break;
+ case DW_TAG_namespace:
+ add_psymbol_to_list (actual_name, strlen (actual_name),
+ built_actual_name,
+ VAR_DOMAIN, LOC_TYPEDEF,
+ &objfile->global_psymbols,
+ 0, (CORE_ADDR) 0, cu->language, objfile);
+ break;
+ case DW_TAG_class_type:
+ case DW_TAG_interface_type:
+ case DW_TAG_structure_type:
+ case DW_TAG_union_type:
+ case DW_TAG_enumeration_type:
+ /* Skip external references. The DWARF standard says in the section
+ about "Structure, Union, and Class Type Entries": "An incomplete
+ structure, union or class type is represented by a structure,
+ union or class entry that does not have a byte size attribute
+ and that has a DW_AT_declaration attribute." */
+ if (!pdi->has_byte_size && pdi->is_declaration)
+ {
+ if (built_actual_name)
+ xfree (actual_name);
+ return;
+ }
- attr = dwarf2_attr (die, DW_AT_language, cu);
- if (attr)
- {
- set_cu_language (DW_UNSND (attr), cu);
+ /* NOTE: carlton/2003-10-07: See comment in new_symbol about
+ static vs. global. */
+ add_psymbol_to_list (actual_name, strlen (actual_name),
+ built_actual_name,
+ STRUCT_DOMAIN, LOC_TYPEDEF,
+ (cu->language == language_cplus
+ || cu->language == language_java)
+ ? &objfile->global_psymbols
+ : &objfile->static_psymbols,
+ 0, (CORE_ADDR) 0, cu->language, objfile);
+
+ break;
+ case DW_TAG_enumerator:
+ add_psymbol_to_list (actual_name, strlen (actual_name),
+ built_actual_name,
+ VAR_DOMAIN, LOC_CONST,
+ (cu->language == language_cplus
+ || cu->language == language_java)
+ ? &objfile->global_psymbols
+ : &objfile->static_psymbols,
+ 0, (CORE_ADDR) 0, cu->language, objfile);
+ break;
+ default:
+ break;
}
- attr = dwarf2_attr (die, DW_AT_producer, cu);
- if (attr)
- cu->producer = DW_STRING (attr);
+ if (built_actual_name)
+ xfree (actual_name);
+}
- /* We assume that we're processing GCC output. */
- processing_gcc_compilation = 2;
+/* Read a partial die corresponding to a namespace; also, add a symbol
+ corresponding to that namespace to the symbol table. NAMESPACE is
+ the name of the enclosing namespace. */
- processing_has_namespace_info = 0;
+static void
+add_partial_namespace (struct partial_die_info *pdi,
+ CORE_ADDR *lowpc, CORE_ADDR *highpc,
+ int need_pc, struct dwarf2_cu *cu)
+{
+ /* Add a symbol for the namespace. */
- start_symtab (name, comp_dir, lowpc);
- record_debugformat ("DWARF 2");
- record_producer (cu->producer);
+ add_partial_symbol (pdi, cu);
- initialize_cu_func_list (cu);
+ /* Now scan partial symbols in that namespace. */
- /* Decode line number information if present. We do this before
- processing child DIEs, so that the line header table is available
- for DW_AT_decl_file. */
- attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
- if (attr)
- {
- unsigned int line_offset = DW_UNSND (attr);
- line_header = dwarf_decode_line_header (line_offset, abfd, cu);
- if (line_header)
- {
- cu->line_header = line_header;
- make_cleanup (free_cu_line_header, cu);
- dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL);
- }
- }
+ if (pdi->has_children)
+ scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
+}
- /* Process all dies in compilation unit. */
- if (die->child != NULL)
- {
- child_die = die->child;
- while (child_die && child_die->tag)
- {
- process_die (child_die, cu);
- child_die = sibling_die (child_die);
- }
- }
+/* Read a partial die corresponding to a Fortran module. */
- /* Decode macro information, if present. Dwarf 2 macro information
- refers to information in the line number info statement program
- header, so we can only read it if we've read the header
- successfully. */
- attr = dwarf2_attr (die, DW_AT_macro_info, cu);
- if (attr && line_header)
- {
- unsigned int macro_offset = DW_UNSND (attr);
+static void
+add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
+ CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
+{
+ /* Now scan partial symbols in that module. */
- dwarf_decode_macros (line_header, macro_offset,
- comp_dir, abfd, cu);
- }
- do_cleanups (back_to);
+ if (pdi->has_children)
+ scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
}
-/* For TUs we want to skip the first top level sibling if it's not the
- actual type being defined by this TU. In this case the first top
- level sibling is there to provide context only. */
+/* Read a partial die corresponding to a subprogram and create a partial
+ symbol for that subprogram. When the CU language allows it, this
+ routine also defines a partial symbol for each nested subprogram
+ that this subprogram contains.
+
+ DIE my also be a lexical block, in which case we simply search
+ recursively for suprograms defined inside that lexical block.
+ Again, this is only performed when the CU language allows this
+ type of definitions. */
static void
-read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
-{
- struct objfile *objfile = cu->objfile;
- struct cleanup *back_to = make_cleanup (null_cleanup, 0);
- CORE_ADDR lowpc;
- struct attribute *attr;
- char *name = NULL;
- char *comp_dir = NULL;
- struct die_info *child_die;
- bfd *abfd = objfile->obfd;
-
- /* start_symtab needs a low pc, but we don't really have one.
- Do what read_file_scope would do in the absence of such info. */
- lowpc = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
-
- /* Find the filename. Do not use dwarf2_name here, since the filename
- is not a source language identifier. */
- attr = dwarf2_attr (die, DW_AT_name, cu);
- if (attr)
- name = DW_STRING (attr);
-
- attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
- if (attr)
- comp_dir = DW_STRING (attr);
- else if (name != NULL && IS_ABSOLUTE_PATH (name))
+add_partial_subprogram (struct partial_die_info *pdi,
+ CORE_ADDR *lowpc, CORE_ADDR *highpc,
+ int need_pc, struct dwarf2_cu *cu)
+{
+ if (pdi->tag == DW_TAG_subprogram)
{
- comp_dir = ldirname (name);
- if (comp_dir != NULL)
- make_cleanup (xfree, comp_dir);
- }
-
- if (name == NULL)
- name = "<unknown>";
-
- attr = dwarf2_attr (die, DW_AT_language, cu);
- if (attr)
- set_cu_language (DW_UNSND (attr), cu);
-
- /* This isn't technically needed today. It is done for symmetry
- with read_file_scope. */
- attr = dwarf2_attr (die, DW_AT_producer, cu);
- if (attr)
- cu->producer = DW_STRING (attr);
-
- /* We assume that we're processing GCC output. */
- processing_gcc_compilation = 2;
-
- processing_has_namespace_info = 0;
-
- start_symtab (name, comp_dir, lowpc);
- record_debugformat ("DWARF 2");
- record_producer (cu->producer);
+ if (pdi->has_pc_info)
+ {
+ if (pdi->lowpc < *lowpc)
+ *lowpc = pdi->lowpc;
+ if (pdi->highpc > *highpc)
+ *highpc = pdi->highpc;
+ if (need_pc)
+ {
+ CORE_ADDR baseaddr;
+ struct objfile *objfile = cu->objfile;
- /* Process the dies in the type unit. */
- if (die->child == NULL)
- {
- dump_die_for_error (die);
- error (_("Dwarf Error: Missing children for type unit [in module %s]"),
- bfd_get_filename (abfd));
+ baseaddr = ANOFFSET (objfile->section_offsets,
+ SECT_OFF_TEXT (objfile));
+ addrmap_set_empty (objfile->psymtabs_addrmap,
+ pdi->lowpc + baseaddr,
+ pdi->highpc - 1 + baseaddr,
+ cu->per_cu->v.psymtab);
+ }
+ if (!pdi->is_declaration)
+ /* Ignore subprogram DIEs that do not have a name, they are
+ illegal. Do not emit a complaint at this point, we will
+ do so when we convert this psymtab into a symtab. */
+ if (pdi->name)
+ add_partial_symbol (pdi, cu);
+ }
}
- child_die = die->child;
+ if (! pdi->has_children)
+ return;
- while (child_die && child_die->tag)
+ if (cu->language == language_ada)
{
- process_die (child_die, cu);
-
- child_die = sibling_die (child_die);
+ pdi = pdi->die_child;
+ while (pdi != NULL)
+ {
+ fixup_partial_die (pdi, cu);
+ if (pdi->tag == DW_TAG_subprogram
+ || pdi->tag == DW_TAG_lexical_block)
+ add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
+ pdi = pdi->die_sibling;
+ }
}
-
- do_cleanups (back_to);
}
+/* Read a partial die corresponding to an enumeration type. */
+
static void
-add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc,
- struct dwarf2_cu *cu)
+add_partial_enumeration (struct partial_die_info *enum_pdi,
+ struct dwarf2_cu *cu)
{
- struct function_range *thisfn;
-
- thisfn = (struct function_range *)
- obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range));
- thisfn->name = name;
- thisfn->lowpc = lowpc;
- thisfn->highpc = highpc;
- thisfn->seen_line = 0;
- thisfn->next = NULL;
+ struct partial_die_info *pdi;
- if (cu->last_fn == NULL)
- cu->first_fn = thisfn;
- else
- cu->last_fn->next = thisfn;
+ if (enum_pdi->name != NULL)
+ add_partial_symbol (enum_pdi, cu);
- cu->last_fn = thisfn;
+ pdi = enum_pdi->die_child;
+ while (pdi)
+ {
+ if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
+ complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
+ else
+ add_partial_symbol (pdi, cu);
+ pdi = pdi->die_sibling;
+ }
}
-/* qsort helper for inherit_abstract_dies. */
+/* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
+ Return the corresponding abbrev, or NULL if the number is zero (indicating
+ an empty DIE). In either case *BYTES_READ will be set to the length of
+ the initial number. */
-static int
-unsigned_int_compar (const void *ap, const void *bp)
+static struct abbrev_info *
+peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
+ struct dwarf2_cu *cu)
{
- unsigned int a = *(unsigned int *) ap;
- unsigned int b = *(unsigned int *) bp;
+ bfd *abfd = cu->objfile->obfd;
+ unsigned int abbrev_number;
+ struct abbrev_info *abbrev;
- return (a > b) - (b > a);
-}
+ abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
-/* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
- Inherit only the children of the DW_AT_abstract_origin DIE not being already
- referenced by DW_AT_abstract_origin from the children of the current DIE. */
+ if (abbrev_number == 0)
+ return NULL;
-static void
-inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
-{
- struct die_info *child_die;
- unsigned die_children_count;
- /* CU offsets which were referenced by children of the current DIE. */
- unsigned *offsets;
- unsigned *offsets_end, *offsetp;
- /* Parent of DIE - referenced by DW_AT_abstract_origin. */
- struct die_info *origin_die;
- /* Iterator of the ORIGIN_DIE children. */
- struct die_info *origin_child_die;
- struct cleanup *cleanups;
- struct attribute *attr;
+ abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
+ if (!abbrev)
+ {
+ error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
+ abbrev_number, bfd_get_filename (abfd));
+ }
- attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
- if (!attr)
- return;
+ return abbrev;
+}
- origin_die = follow_die_ref (die, attr, &cu);
- if (die->tag != origin_die->tag
- && !(die->tag == DW_TAG_inlined_subroutine
- && origin_die->tag == DW_TAG_subprogram))
- complaint (&symfile_complaints,
- _("DIE 0x%x and its abstract origin 0x%x have different tags"),
- die->offset, origin_die->offset);
+/* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
+ Returns a pointer to the end of a series of DIEs, terminated by an empty
+ DIE. Any children of the skipped DIEs will also be skipped. */
- child_die = die->child;
- die_children_count = 0;
- while (child_die && child_die->tag)
+static gdb_byte *
+skip_children (gdb_byte *buffer, gdb_byte *info_ptr, struct dwarf2_cu *cu)
+{
+ struct abbrev_info *abbrev;
+ unsigned int bytes_read;
+
+ while (1)
{
- child_die = sibling_die (child_die);
- die_children_count++;
+ abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
+ if (abbrev == NULL)
+ return info_ptr + bytes_read;
+ else
+ info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
}
- offsets = xmalloc (sizeof (*offsets) * die_children_count);
- cleanups = make_cleanup (xfree, offsets);
+}
- offsets_end = offsets;
- child_die = die->child;
- while (child_die && child_die->tag)
- {
- /* For each CHILD_DIE, find the corresponding child of
- ORIGIN_DIE. If there is more than one layer of
- DW_AT_abstract_origin, follow them all; there shouldn't be,
- but GCC versions at least through 4.4 generate this (GCC PR
- 40573). */
- struct die_info *child_origin_die = child_die;
+/* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
+ INFO_PTR should point just after the initial uleb128 of a DIE, and the
+ abbrev corresponding to that skipped uleb128 should be passed in
+ ABBREV. Returns a pointer to this DIE's sibling, skipping any
+ children. */
- while (1)
- {
- attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, cu);
- if (attr == NULL)
- break;
- child_origin_die = follow_die_ref (child_origin_die, attr, &cu);
- }
+static gdb_byte *
+skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
+ struct abbrev_info *abbrev, struct dwarf2_cu *cu)
+{
+ unsigned int bytes_read;
+ struct attribute attr;
+ bfd *abfd = cu->objfile->obfd;
+ unsigned int form, i;
- /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
- counterpart may exist. */
- if (child_origin_die != child_die)
+ for (i = 0; i < abbrev->num_attrs; i++)
+ {
+ /* The only abbrev we care about is DW_AT_sibling. */
+ if (abbrev->attrs[i].name == DW_AT_sibling)
{
- if (child_die->tag != child_origin_die->tag
- && !(child_die->tag == DW_TAG_inlined_subroutine
- && child_origin_die->tag == DW_TAG_subprogram))
- complaint (&symfile_complaints,
- _("Child DIE 0x%x and its abstract origin 0x%x have "
- "different tags"), child_die->offset,
- child_origin_die->offset);
- if (child_origin_die->parent != origin_die)
+ read_attribute (&attr, &abbrev->attrs[i],
+ abfd, info_ptr, cu);
+ if (attr.form == DW_FORM_ref_addr)
complaint (&symfile_complaints,
- _("Child DIE 0x%x and its abstract origin 0x%x have "
- "different parents"), child_die->offset,
- child_origin_die->offset);
+ _("ignoring absolute DW_AT_sibling"));
else
- *offsets_end++ = child_origin_die->offset;
+ return buffer + dwarf2_get_ref_die_offset (&attr);
}
- child_die = sibling_die (child_die);
- }
- qsort (offsets, offsets_end - offsets, sizeof (*offsets),
- unsigned_int_compar);
- for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++)
- if (offsetp[-1] == *offsetp)
- complaint (&symfile_complaints, _("Multiple children of DIE 0x%x refer "
- "to DIE 0x%x as their abstract origin"),
- die->offset, *offsetp);
- offsetp = offsets;
- origin_child_die = origin_die->child;
- while (origin_child_die && origin_child_die->tag)
- {
- /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
- while (offsetp < offsets_end && *offsetp < origin_child_die->offset)
- offsetp++;
- if (offsetp >= offsets_end || *offsetp > origin_child_die->offset)
+ /* If it isn't DW_AT_sibling, skip this attribute. */
+ form = abbrev->attrs[i].form;
+ skip_attribute:
+ switch (form)
{
- /* Found that ORIGIN_CHILD_DIE is really not referenced. */
- process_die (origin_child_die, cu);
- }
- origin_child_die = sibling_die (origin_child_die);
- }
-
- do_cleanups (cleanups);
-}
-
-static void
-read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
-{
- struct objfile *objfile = cu->objfile;
- struct context_stack *new;
- CORE_ADDR lowpc;
- CORE_ADDR highpc;
- struct die_info *child_die;
- struct attribute *attr, *call_line, *call_file;
- char *name;
- CORE_ADDR baseaddr;
- struct block *block;
- int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
+ case DW_FORM_ref_addr:
+ /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
+ and later it is offset sized. */
+ if (cu->header.version == 2)
+ info_ptr += cu->header.addr_size;
+ else
+ info_ptr += cu->header.offset_size;
+ break;
+ case DW_FORM_addr:
+ info_ptr += cu->header.addr_size;
+ break;
+ case DW_FORM_data1:
+ case DW_FORM_ref1:
+ case DW_FORM_flag:
+ info_ptr += 1;
+ break;
+ case DW_FORM_flag_present:
+ break;
+ case DW_FORM_data2:
+ case DW_FORM_ref2:
+ info_ptr += 2;
+ break;
+ case DW_FORM_data4:
+ case DW_FORM_ref4:
+ info_ptr += 4;
+ break;
+ case DW_FORM_data8:
+ case DW_FORM_ref8:
+ case DW_FORM_sig8:
+ info_ptr += 8;
+ break;
+ case DW_FORM_string:
+ read_direct_string (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_sec_offset:
+ case DW_FORM_strp:
+ info_ptr += cu->header.offset_size;
+ break;
+ case DW_FORM_exprloc:
+ case DW_FORM_block:
+ info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_block1:
+ info_ptr += 1 + read_1_byte (abfd, info_ptr);
+ break;
+ case DW_FORM_block2:
+ info_ptr += 2 + read_2_bytes (abfd, info_ptr);
+ break;
+ case DW_FORM_block4:
+ info_ptr += 4 + read_4_bytes (abfd, info_ptr);
+ break;
+ case DW_FORM_sdata:
+ case DW_FORM_udata:
+ case DW_FORM_ref_udata:
+ info_ptr = skip_leb128 (abfd, info_ptr);
+ break;
+ case DW_FORM_indirect:
+ form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ /* We need to continue parsing from here, so just go back to
+ the top. */
+ goto skip_attribute;
- if (inlined_func)
- {
- /* If we do not have call site information, we can't show the
- caller of this inlined function. That's too confusing, so
- only use the scope for local variables. */
- call_line = dwarf2_attr (die, DW_AT_call_line, cu);
- call_file = dwarf2_attr (die, DW_AT_call_file, cu);
- if (call_line == NULL || call_file == NULL)
- {
- read_lexical_block_scope (die, cu);
- return;
+ default:
+ error (_("Dwarf Error: Cannot handle %s "
+ "in DWARF reader [in module %s]"),
+ dwarf_form_name (form),
+ bfd_get_filename (abfd));
}
}
- baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+ if (abbrev->has_children)
+ return skip_children (buffer, info_ptr, cu);
+ else
+ return info_ptr;
+}
- name = dwarf2_name (die, cu);
+/* Locate ORIG_PDI's sibling.
+ INFO_PTR should point to the start of the next DIE after ORIG_PDI
+ in BUFFER. */
- /* Ignore functions with missing or empty names. These are actually
- illegal according to the DWARF standard. */
- if (name == NULL)
- {
- complaint (&symfile_complaints,
- _("missing name for subprogram DIE at %d"), die->offset);
- return;
- }
+static gdb_byte *
+locate_pdi_sibling (struct partial_die_info *orig_pdi,
+ gdb_byte *buffer, gdb_byte *info_ptr,
+ bfd *abfd, struct dwarf2_cu *cu)
+{
+ /* Do we know the sibling already? */
- /* Ignore functions with missing or invalid low and high pc attributes. */
- if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
- {
- attr = dwarf2_attr (die, DW_AT_external, cu);
- if (!attr || !DW_UNSND (attr))
- complaint (&symfile_complaints,
- _("cannot get low and high bounds for subprogram DIE at %d"),
- die->offset);
- return;
- }
+ if (orig_pdi->sibling)
+ return orig_pdi->sibling;
- lowpc += baseaddr;
- highpc += baseaddr;
+ /* Are there any children to deal with? */
- /* Record the function range for dwarf_decode_lines. */
- add_to_cu_func_list (name, lowpc, highpc, cu);
+ if (!orig_pdi->has_children)
+ return info_ptr;
- new = push_context (0, lowpc);
- new->name = new_symbol (die, read_type_die (die, cu), cu);
+ /* Skip the children the long way. */
- /* If there is a location expression for DW_AT_frame_base, record
- it. */
- attr = dwarf2_attr (die, DW_AT_frame_base, cu);
- if (attr)
- /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
- expression is being recorded directly in the function's symbol
- and not in a separate frame-base object. I guess this hack is
- to avoid adding some sort of frame-base adjunct/annex to the
- function's symbol :-(. The problem with doing this is that it
- results in a function symbol with a location expression that
- has nothing to do with the location of the function, ouch! The
- relationship should be: a function's symbol has-a frame base; a
- frame-base has-a location expression. */
- dwarf2_symbol_mark_computed (attr, new->name, cu);
+ return skip_children (buffer, info_ptr, cu);
+}
- cu->list_in_scope = &local_symbols;
+/* Expand this partial symbol table into a full symbol table. */
- if (die->child != NULL)
+static void
+dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
+{
+ if (pst != NULL)
{
- child_die = die->child;
- while (child_die && child_die->tag)
+ if (pst->readin)
{
- process_die (child_die, cu);
- child_die = sibling_die (child_die);
+ warning (_("bug: psymtab for %s is already read in."),
+ pst->filename);
}
- }
-
- inherit_abstract_dies (die, cu);
+ else
+ {
+ if (info_verbose)
+ {
+ printf_filtered (_("Reading in symbols for %s..."),
+ pst->filename);
+ gdb_flush (gdb_stdout);
+ }
- /* If we have a DW_AT_specification, we might need to import using
- directives from the context of the specification DIE. See the
- comment in determine_prefix. */
- if (cu->language == language_cplus
- && dwarf2_attr (die, DW_AT_specification, cu))
- {
- struct dwarf2_cu *spec_cu = cu;
- struct die_info *spec_die = die_specification (die, &spec_cu);
+ /* Restore our global data. */
+ dwarf2_per_objfile = objfile_data (pst->objfile,
+ dwarf2_objfile_data_key);
- while (spec_die)
- {
- child_die = spec_die->child;
- while (child_die && child_die->tag)
+ /* If this psymtab is constructed from a debug-only objfile, the
+ has_section_at_zero flag will not necessarily be correct. We
+ can get the correct value for this flag by looking at the data
+ associated with the (presumably stripped) associated objfile. */
+ if (pst->objfile->separate_debug_objfile_backlink)
{
- if (child_die->tag == DW_TAG_imported_module)
- process_die (child_die, spec_cu);
- child_die = sibling_die (child_die);
+ struct dwarf2_per_objfile *dpo_backlink
+ = objfile_data (pst->objfile->separate_debug_objfile_backlink,
+ dwarf2_objfile_data_key);
+
+ dwarf2_per_objfile->has_section_at_zero
+ = dpo_backlink->has_section_at_zero;
}
- /* In some cases, GCC generates specification DIEs that
- themselves contain DW_AT_specification attributes. */
- spec_die = die_specification (spec_die, &spec_cu);
+ dwarf2_per_objfile->reading_partial_symbols = 0;
+
+ psymtab_to_symtab_1 (pst);
+
+ /* Finish up the debug error message. */
+ if (info_verbose)
+ printf_filtered (_("done.\n"));
}
}
+}
- new = pop_context ();
- /* Make a block for the local symbols within. */
- block = finish_block (new->name, &local_symbols, new->old_blocks,
- lowpc, highpc, objfile);
-
- /* For C++, set the block's scope. */
- if (cu->language == language_cplus || cu->language == language_fortran)
- cp_set_block_scope (new->name, block, &objfile->objfile_obstack,
- determine_prefix (die, cu),
- processing_has_namespace_info);
+/* Add PER_CU to the queue. */
- /* If we have address ranges, record them. */
- dwarf2_record_block_ranges (die, block, baseaddr, cu);
+static void
+queue_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
+{
+ struct dwarf2_queue_item *item;
- /* In C++, we can have functions nested inside functions (e.g., when
- a function declares a class that has methods). This means that
- when we finish processing a function scope, we may need to go
- back to building a containing block's symbol lists. */
- local_symbols = new->locals;
- param_symbols = new->params;
- using_directives = new->using_directives;
+ per_cu->queued = 1;
+ item = xmalloc (sizeof (*item));
+ item->per_cu = per_cu;
+ item->next = NULL;
- /* If we've finished processing a top-level function, subsequent
- symbols go in the file symbol list. */
- if (outermost_context_p ())
- cu->list_in_scope = &file_symbols;
+ if (dwarf2_queue == NULL)
+ dwarf2_queue = item;
+ else
+ dwarf2_queue_tail->next = item;
+
+ dwarf2_queue_tail = item;
}
-/* Process all the DIES contained within a lexical block scope. Start
- a new scope, process the dies, and then close the scope. */
+/* Process the queue. */
static void
-read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
+process_queue (struct objfile *objfile)
{
- struct objfile *objfile = cu->objfile;
- struct context_stack *new;
- CORE_ADDR lowpc, highpc;
- struct die_info *child_die;
- CORE_ADDR baseaddr;
+ struct dwarf2_queue_item *item, *next_item;
- baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+ /* The queue starts out with one item, but following a DIE reference
+ may load a new CU, adding it to the end of the queue. */
+ for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
+ {
+ if (dwarf2_per_objfile->using_index
+ ? !item->per_cu->v.quick->symtab
+ : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin))
+ process_full_comp_unit (item->per_cu);
- /* Ignore blocks with missing or invalid low and high pc attributes. */
- /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
- as multiple lexical blocks? Handling children in a sane way would
- be nasty. Might be easier to properly extend generic blocks to
- describe ranges. */
- if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
- return;
- lowpc += baseaddr;
- highpc += baseaddr;
+ item->per_cu->queued = 0;
+ next_item = item->next;
+ xfree (item);
+ }
- push_context (0, lowpc);
- if (die->child != NULL)
+ dwarf2_queue_tail = NULL;
+}
+
+/* Free all allocated queue entries. This function only releases anything if
+ an error was thrown; if the queue was processed then it would have been
+ freed as we went along. */
+
+static void
+dwarf2_release_queue (void *dummy)
+{
+ struct dwarf2_queue_item *item, *last;
+
+ item = dwarf2_queue;
+ while (item)
{
- child_die = die->child;
- while (child_die && child_die->tag)
+ /* Anything still marked queued is likely to be in an
+ inconsistent state, so discard it. */
+ if (item->per_cu->queued)
{
- process_die (child_die, cu);
- child_die = sibling_die (child_die);
+ if (item->per_cu->cu != NULL)
+ free_one_cached_comp_unit (item->per_cu->cu);
+ item->per_cu->queued = 0;
}
- }
- new = pop_context ();
-
- if (local_symbols != NULL || using_directives != NULL)
- {
- struct block *block
- = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
- highpc, objfile);
-
- /* Note that recording ranges after traversing children, as we
- do here, means that recording a parent's ranges entails
- walking across all its children's ranges as they appear in
- the address map, which is quadratic behavior.
- It would be nicer to record the parent's ranges before
- traversing its children, simply overriding whatever you find
- there. But since we don't even decide whether to create a
- block until after we've traversed its children, that's hard
- to do. */
- dwarf2_record_block_ranges (die, block, baseaddr, cu);
+ last = item;
+ item = item->next;
+ xfree (last);
}
- local_symbols = new->locals;
- using_directives = new->using_directives;
+
+ dwarf2_queue = dwarf2_queue_tail = NULL;
}
-/* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
- Return 1 if the attributes are present and valid, otherwise, return 0.
- If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
+/* Read in full symbols for PST, and anything it depends on. */
-static int
-dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
- CORE_ADDR *high_return, struct dwarf2_cu *cu,
- struct partial_symtab *ranges_pst)
+static void
+psymtab_to_symtab_1 (struct partial_symtab *pst)
{
- struct objfile *objfile = cu->objfile;
- struct comp_unit_head *cu_header = &cu->header;
- bfd *obfd = objfile->obfd;
- unsigned int addr_size = cu_header->addr_size;
- CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
- /* Base address selection entry. */
- CORE_ADDR base;
- int found_base;
- unsigned int dummy;
- gdb_byte *buffer;
- CORE_ADDR marker;
- int low_set;
- CORE_ADDR low = 0;
- CORE_ADDR high = 0;
- CORE_ADDR baseaddr;
+ struct dwarf2_per_cu_data *per_cu;
+ struct cleanup *back_to;
+ int i;
- found_base = cu->base_known;
- base = cu->base_address;
+ for (i = 0; i < pst->number_of_dependencies; i++)
+ if (!pst->dependencies[i]->readin)
+ {
+ /* Inform about additional files that need to be read in. */
+ if (info_verbose)
+ {
+ /* FIXME: i18n: Need to make this a single string. */
+ fputs_filtered (" ", gdb_stdout);
+ wrap_here ("");
+ fputs_filtered ("and ", gdb_stdout);
+ wrap_here ("");
+ printf_filtered ("%s...", pst->dependencies[i]->filename);
+ wrap_here (""); /* Flush output. */
+ gdb_flush (gdb_stdout);
+ }
+ psymtab_to_symtab_1 (pst->dependencies[i]);
+ }
- dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
- if (offset >= dwarf2_per_objfile->ranges.size)
- {
- complaint (&symfile_complaints,
- _("Offset %d out of bounds for DW_AT_ranges attribute"),
- offset);
- return 0;
- }
- buffer = dwarf2_per_objfile->ranges.buffer + offset;
+ per_cu = pst->read_symtab_private;
- /* Read in the largest possible address. */
- marker = read_address (obfd, buffer, cu, &dummy);
- if ((marker & mask) == mask)
+ if (per_cu == NULL)
{
- /* If we found the largest possible address, then
- read the base address. */
- base = read_address (obfd, buffer + addr_size, cu, &dummy);
- buffer += 2 * addr_size;
- offset += 2 * addr_size;
- found_base = 1;
+ /* It's an include file, no symbols to read for it.
+ Everything is in the parent symtab. */
+ pst->readin = 1;
+ return;
}
- low_set = 0;
+ dw2_do_instantiate_symtab (pst->objfile, per_cu);
+}
- baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+/* Load the DIEs associated with PER_CU into memory. */
- while (1)
+static void
+load_full_comp_unit (struct dwarf2_per_cu_data *per_cu,
+ struct objfile *objfile)
+{
+ bfd *abfd = objfile->obfd;
+ struct dwarf2_cu *cu;
+ unsigned int offset;
+ gdb_byte *info_ptr, *beg_of_comp_unit;
+ struct cleanup *free_abbrevs_cleanup = NULL, *free_cu_cleanup = NULL;
+ struct attribute *attr;
+ int read_cu = 0;
+
+ gdb_assert (! per_cu->from_debug_types);
+
+ /* Set local variables from the partial symbol table info. */
+ offset = per_cu->offset;
+
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
+ info_ptr = dwarf2_per_objfile->info.buffer + offset;
+ beg_of_comp_unit = info_ptr;
+
+ if (per_cu->cu == NULL)
{
- CORE_ADDR range_beginning, range_end;
+ cu = xmalloc (sizeof (*cu));
+ init_one_comp_unit (cu, objfile);
- range_beginning = read_address (obfd, buffer, cu, &dummy);
- buffer += addr_size;
- range_end = read_address (obfd, buffer, cu, &dummy);
- buffer += addr_size;
- offset += 2 * addr_size;
+ read_cu = 1;
- /* An end of list marker is a pair of zero addresses. */
- if (range_beginning == 0 && range_end == 0)
- /* Found the end of list entry. */
- break;
+ /* If an error occurs while loading, release our storage. */
+ free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
- /* Each base address selection entry is a pair of 2 values.
- The first is the largest possible address, the second is
- the base address. Check for a base address here. */
- if ((range_beginning & mask) == mask)
- {
- /* If we found the largest possible address, then
- read the base address. */
- base = read_address (obfd, buffer + addr_size, cu, &dummy);
- found_base = 1;
- continue;
- }
+ /* Read in the comp_unit header. */
+ info_ptr = read_comp_unit_head (&cu->header, info_ptr, abfd);
- if (!found_base)
- {
- /* We have no valid base address for the ranges
- data. */
- complaint (&symfile_complaints,
- _("Invalid .debug_ranges data (no base address)"));
- return 0;
- }
+ /* Complete the cu_header. */
+ cu->header.offset = offset;
+ cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
- range_beginning += base;
- range_end += base;
+ /* Read the abbrevs for this compilation unit. */
+ dwarf2_read_abbrevs (abfd, cu);
+ free_abbrevs_cleanup = make_cleanup (dwarf2_free_abbrev_table, cu);
- if (ranges_pst != NULL && range_beginning < range_end)
- addrmap_set_empty (objfile->psymtabs_addrmap,
- range_beginning + baseaddr, range_end - 1 + baseaddr,
- ranges_pst);
+ /* Link this compilation unit into the compilation unit tree. */
+ per_cu->cu = cu;
+ cu->per_cu = per_cu;
- /* FIXME: This is recording everything as a low-high
- segment of consecutive addresses. We should have a
- data structure for discontiguous block ranges
- instead. */
- if (! low_set)
- {
- low = range_beginning;
- high = range_end;
- low_set = 1;
- }
- else
- {
- if (range_beginning < low)
- low = range_beginning;
- if (range_end > high)
- high = range_end;
- }
+ /* Link this CU into read_in_chain. */
+ per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
+ dwarf2_per_objfile->read_in_chain = per_cu;
+ }
+ else
+ {
+ cu = per_cu->cu;
+ info_ptr += cu->header.first_die_offset;
}
- if (! low_set)
- /* If the first entry is an end-of-list marker, the range
- describes an empty scope, i.e. no instructions. */
- return 0;
+ cu->dies = read_comp_unit (info_ptr, cu);
- if (low_return)
- *low_return = low;
- if (high_return)
- *high_return = high;
- return 1;
-}
-
-/* Get low and high pc attributes from a die. Return 1 if the attributes
- are present and valid, otherwise, return 0. Return -1 if the range is
- discontinuous, i.e. derived from DW_AT_ranges information. */
-static int
-dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
- CORE_ADDR *highpc, struct dwarf2_cu *cu,
- struct partial_symtab *pst)
-{
- struct attribute *attr;
- CORE_ADDR low = 0;
- CORE_ADDR high = 0;
- int ret = 0;
+ /* We try not to read any attributes in this function, because not
+ all objfiles needed for references have been loaded yet, and symbol
+ table processing isn't initialized. But we have to set the CU language,
+ or we won't be able to build types correctly. */
+ prepare_one_comp_unit (cu, cu->dies);
- attr = dwarf2_attr (die, DW_AT_high_pc, cu);
+ /* Similarly, if we do not read the producer, we can not apply
+ producer-specific interpretation. */
+ attr = dwarf2_attr (cu->dies, DW_AT_producer, cu);
if (attr)
- {
- high = DW_ADDR (attr);
- attr = dwarf2_attr (die, DW_AT_low_pc, cu);
- if (attr)
- low = DW_ADDR (attr);
- else
- /* Found high w/o low attribute. */
- return 0;
+ cu->producer = DW_STRING (attr);
- /* Found consecutive range of addresses. */
- ret = 1;
- }
- else
+ if (read_cu)
{
- attr = dwarf2_attr (die, DW_AT_ranges, cu);
- if (attr != NULL)
- {
- /* Value of the DW_AT_ranges attribute is the offset in the
- .debug_ranges section. */
- if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu, pst))
- return 0;
- /* Found discontinuous range of addresses. */
- ret = -1;
- }
- }
+ do_cleanups (free_abbrevs_cleanup);
- if (high < low)
- return 0;
+ /* We've successfully allocated this compilation unit. Let our
+ caller clean it up when finished with it. */
+ discard_cleanups (free_cu_cleanup);
+ }
+}
- /* When using the GNU linker, .gnu.linkonce. sections are used to
- eliminate duplicate copies of functions and vtables and such.
- The linker will arbitrarily choose one and discard the others.
- The AT_*_pc values for such functions refer to local labels in
- these sections. If the section from that file was discarded, the
- labels are not in the output, so the relocs get a value of 0.
- If this is a discarded function, mark the pc bounds as invalid,
- so that GDB will ignore it. */
- if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
- return 0;
+/* Add a DIE to the delayed physname list. */
- *lowpc = low;
- *highpc = high;
- return ret;
+static void
+add_to_method_list (struct type *type, int fnfield_index, int index,
+ const char *name, struct die_info *die,
+ struct dwarf2_cu *cu)
+{
+ struct delayed_method_info mi;
+ mi.type = type;
+ mi.fnfield_index = fnfield_index;
+ mi.index = index;
+ mi.name = name;
+ mi.die = die;
+ VEC_safe_push (delayed_method_info, cu->method_list, &mi);
}
-/* Assuming that DIE represents a subprogram DIE or a lexical block, get
- its low and high PC addresses. Do nothing if these addresses could not
- be determined. Otherwise, set LOWPC to the low address if it is smaller,
- and HIGHPC to the high address if greater than HIGHPC. */
+/* A cleanup for freeing the delayed method list. */
static void
-dwarf2_get_subprogram_pc_bounds (struct die_info *die,
- CORE_ADDR *lowpc, CORE_ADDR *highpc,
- struct dwarf2_cu *cu)
+free_delayed_list (void *ptr)
{
- CORE_ADDR low, high;
- struct die_info *child = die->child;
-
- if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL))
+ struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr;
+ if (cu->method_list != NULL)
{
- *lowpc = min (*lowpc, low);
- *highpc = max (*highpc, high);
+ VEC_free (delayed_method_info, cu->method_list);
+ cu->method_list = NULL;
}
+}
- /* If the language does not allow nested subprograms (either inside
- subprograms or lexical blocks), we're done. */
- if (cu->language != language_ada)
- return;
+/* Compute the physnames of any methods on the CU's method list.
- /* Check all the children of the given DIE. If it contains nested
- subprograms, then check their pc bounds. Likewise, we need to
- check lexical blocks as well, as they may also contain subprogram
- definitions. */
- while (child && child->tag)
+ The computation of method physnames is delayed in order to avoid the
+ (bad) condition that one of the method's formal parameters is of an as yet
+ incomplete type. */
+
+static void
+compute_delayed_physnames (struct dwarf2_cu *cu)
+{
+ int i;
+ struct delayed_method_info *mi;
+ for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i)
{
- if (child->tag == DW_TAG_subprogram
- || child->tag == DW_TAG_lexical_block)
- dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu);
- child = sibling_die (child);
+ char *physname;
+ struct fn_fieldlist *fn_flp
+ = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index);
+ physname = (char *) dwarf2_physname ((char *) mi->name, mi->die, cu);
+ fn_flp->fn_fields[mi->index].physname = physname ? physname : "";
}
}
-/* Get the low and high pc's represented by the scope DIE, and store
- them in *LOWPC and *HIGHPC. If the correct values can't be
- determined, set *LOWPC to -1 and *HIGHPC to 0. */
+/* Generate full symbol information for PST and CU, whose DIEs have
+ already been loaded into memory. */
static void
-get_scope_pc_bounds (struct die_info *die,
- CORE_ADDR *lowpc, CORE_ADDR *highpc,
- struct dwarf2_cu *cu)
+process_full_comp_unit (struct dwarf2_per_cu_data *per_cu)
{
- CORE_ADDR best_low = (CORE_ADDR) -1;
- CORE_ADDR best_high = (CORE_ADDR) 0;
- CORE_ADDR current_low, current_high;
+ struct dwarf2_cu *cu = per_cu->cu;
+ struct objfile *objfile = per_cu->objfile;
+ CORE_ADDR lowpc, highpc;
+ struct symtab *symtab;
+ struct cleanup *back_to, *delayed_list_cleanup;
+ CORE_ADDR baseaddr;
- if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL))
- {
- best_low = current_low;
- best_high = current_high;
- }
- else
- {
- struct die_info *child = die->child;
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
- while (child && child->tag)
- {
- switch (child->tag) {
- case DW_TAG_subprogram:
- dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu);
- break;
- case DW_TAG_namespace:
- case DW_TAG_module:
- /* FIXME: carlton/2004-01-16: Should we do this for
- DW_TAG_class_type/DW_TAG_structure_type, too? I think
- that current GCC's always emit the DIEs corresponding
- to definitions of methods of classes as children of a
- DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
- the DIEs giving the declarations, which could be
- anywhere). But I don't see any reason why the
- standards says that they have to be there. */
- get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
+ buildsym_init ();
+ back_to = make_cleanup (really_free_pendings, NULL);
+ delayed_list_cleanup = make_cleanup (free_delayed_list, cu);
- if (current_low != ((CORE_ADDR) -1))
- {
- best_low = min (best_low, current_low);
- best_high = max (best_high, current_high);
- }
- break;
- default:
- /* Ignore. */
- break;
- }
+ cu->list_in_scope = &file_symbols;
- child = sibling_die (child);
- }
- }
+ dwarf2_find_base_address (cu->dies, cu);
- *lowpc = best_low;
- *highpc = best_high;
-}
+ /* Do line number decoding in read_file_scope () */
+ process_die (cu->dies, cu);
-/* Record the address ranges for BLOCK, offset by BASEADDR, as given
- in DIE. */
-static void
-dwarf2_record_block_ranges (struct die_info *die, struct block *block,
- CORE_ADDR baseaddr, struct dwarf2_cu *cu)
-{
- struct attribute *attr;
+ /* Now that we have processed all the DIEs in the CU, all the types
+ should be complete, and it should now be safe to compute all of the
+ physnames. */
+ compute_delayed_physnames (cu);
+ do_cleanups (delayed_list_cleanup);
- attr = dwarf2_attr (die, DW_AT_high_pc, cu);
- if (attr)
- {
- CORE_ADDR high = DW_ADDR (attr);
+ /* Some compilers don't define a DW_AT_high_pc attribute for the
+ compilation unit. If the DW_AT_high_pc is missing, synthesize
+ it, by scanning the DIE's below the compilation unit. */
+ get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
- attr = dwarf2_attr (die, DW_AT_low_pc, cu);
- if (attr)
- {
- CORE_ADDR low = DW_ADDR (attr);
+ symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
- record_block_range (block, baseaddr + low, baseaddr + high - 1);
- }
+ /* Set symtab language to language from DW_AT_language.
+ If the compilation is from a C file generated by language preprocessors,
+ do not set the language if it was already deduced by start_subfile. */
+ if (symtab != NULL
+ && !(cu->language == language_c && symtab->language != language_c))
+ {
+ symtab->language = cu->language;
}
- attr = dwarf2_attr (die, DW_AT_ranges, cu);
- if (attr)
+ if (dwarf2_per_objfile->using_index)
+ per_cu->v.quick->symtab = symtab;
+ else
{
- bfd *obfd = cu->objfile->obfd;
+ struct partial_symtab *pst = per_cu->v.psymtab;
+ pst->symtab = symtab;
+ pst->readin = 1;
+ }
- /* The value of the DW_AT_ranges attribute is the offset of the
- address range list in the .debug_ranges section. */
- unsigned long offset = DW_UNSND (attr);
- gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset;
+ do_cleanups (back_to);
+}
- /* For some target architectures, but not others, the
- read_address function sign-extends the addresses it returns.
- To recognize base address selection entries, we need a
- mask. */
- unsigned int addr_size = cu->header.addr_size;
- CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
+/* Process a die and its children. */
- /* The base address, to which the next pair is relative. Note
- that this 'base' is a DWARF concept: most entries in a range
- list are relative, to reduce the number of relocs against the
- debugging information. This is separate from this function's
- 'baseaddr' argument, which GDB uses to relocate debugging
- information from a shared library based on the address at
- which the library was loaded. */
- CORE_ADDR base = cu->base_address;
- int base_known = cu->base_known;
+static void
+process_die (struct die_info *die, struct dwarf2_cu *cu)
+{
+ switch (die->tag)
+ {
+ case DW_TAG_padding:
+ break;
+ case DW_TAG_compile_unit:
+ read_file_scope (die, cu);
+ break;
+ case DW_TAG_type_unit:
+ read_type_unit_scope (die, cu);
+ break;
+ case DW_TAG_subprogram:
+ case DW_TAG_inlined_subroutine:
+ read_func_scope (die, cu);
+ break;
+ case DW_TAG_lexical_block:
+ case DW_TAG_try_block:
+ case DW_TAG_catch_block:
+ read_lexical_block_scope (die, cu);
+ break;
+ case DW_TAG_class_type:
+ case DW_TAG_interface_type:
+ case DW_TAG_structure_type:
+ case DW_TAG_union_type:
+ process_structure_scope (die, cu);
+ break;
+ case DW_TAG_enumeration_type:
+ process_enumeration_scope (die, cu);
+ break;
- gdb_assert (dwarf2_per_objfile->ranges.readin);
- if (offset >= dwarf2_per_objfile->ranges.size)
- {
- complaint (&symfile_complaints,
- _("Offset %lu out of bounds for DW_AT_ranges attribute"),
- offset);
- return;
- }
+ /* These dies have a type, but processing them does not create
+ a symbol or recurse to process the children. Therefore we can
+ read them on-demand through read_type_die. */
+ case DW_TAG_subroutine_type:
+ case DW_TAG_set_type:
+ case DW_TAG_array_type:
+ case DW_TAG_pointer_type:
+ case DW_TAG_ptr_to_member_type:
+ case DW_TAG_reference_type:
+ case DW_TAG_string_type:
+ break;
- for (;;)
- {
- unsigned int bytes_read;
- CORE_ADDR start, end;
+ case DW_TAG_base_type:
+ case DW_TAG_subrange_type:
+ case DW_TAG_typedef:
+ /* Add a typedef symbol for the type definition, if it has a
+ DW_AT_name. */
+ new_symbol (die, read_type_die (die, cu), cu);
+ break;
+ case DW_TAG_common_block:
+ read_common_block (die, cu);
+ break;
+ case DW_TAG_common_inclusion:
+ break;
+ case DW_TAG_namespace:
+ processing_has_namespace_info = 1;
+ read_namespace (die, cu);
+ break;
+ case DW_TAG_module:
+ processing_has_namespace_info = 1;
+ read_module (die, cu);
+ break;
+ case DW_TAG_imported_declaration:
+ case DW_TAG_imported_module:
+ processing_has_namespace_info = 1;
+ if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
+ || cu->language != language_fortran))
+ complaint (&symfile_complaints, _("Tag '%s' has unexpected children"),
+ dwarf_tag_name (die->tag));
+ read_import_statement (die, cu);
+ break;
+ default:
+ new_symbol (die, NULL, cu);
+ break;
+ }
+}
- start = read_address (obfd, buffer, cu, &bytes_read);
- buffer += bytes_read;
- end = read_address (obfd, buffer, cu, &bytes_read);
- buffer += bytes_read;
+/* A helper function for dwarf2_compute_name which determines whether DIE
+ needs to have the name of the scope prepended to the name listed in the
+ die. */
- /* Did we find the end of the range list? */
- if (start == 0 && end == 0)
- break;
+static int
+die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct attribute *attr;
- /* Did we find a base address selection entry? */
- else if ((start & base_select_mask) == base_select_mask)
- {
- base = end;
- base_known = 1;
- }
+ switch (die->tag)
+ {
+ case DW_TAG_namespace:
+ case DW_TAG_typedef:
+ case DW_TAG_class_type:
+ case DW_TAG_interface_type:
+ case DW_TAG_structure_type:
+ case DW_TAG_union_type:
+ case DW_TAG_enumeration_type:
+ case DW_TAG_enumerator:
+ case DW_TAG_subprogram:
+ case DW_TAG_member:
+ return 1;
- /* We found an ordinary address range. */
- else
- {
- if (!base_known)
- {
- complaint (&symfile_complaints,
- _("Invalid .debug_ranges data (no base address)"));
- return;
- }
+ case DW_TAG_variable:
+ case DW_TAG_constant:
+ /* We only need to prefix "globally" visible variables. These include
+ any variable marked with DW_AT_external or any variable that
+ lives in a namespace. [Variables in anonymous namespaces
+ require prefixing, but they are not DW_AT_external.] */
- record_block_range (block,
- baseaddr + base + start,
- baseaddr + base + end - 1);
- }
- }
+ if (dwarf2_attr (die, DW_AT_specification, cu))
+ {
+ struct dwarf2_cu *spec_cu = cu;
+
+ return die_needs_namespace (die_specification (die, &spec_cu),
+ spec_cu);
+ }
+
+ attr = dwarf2_attr (die, DW_AT_external, cu);
+ if (attr == NULL && die->parent->tag != DW_TAG_namespace
+ && die->parent->tag != DW_TAG_module)
+ return 0;
+ /* A variable in a lexical block of some kind does not need a
+ namespace, even though in C++ such variables may be external
+ and have a mangled name. */
+ if (die->parent->tag == DW_TAG_lexical_block
+ || die->parent->tag == DW_TAG_try_block
+ || die->parent->tag == DW_TAG_catch_block
+ || die->parent->tag == DW_TAG_subprogram)
+ return 0;
+ return 1;
+
+ default:
+ return 0;
}
}
-/* Add an aggregate field to the field list. */
+/* Retrieve the last character from a mem_file. */
static void
-dwarf2_add_field (struct field_info *fip, struct die_info *die,
- struct dwarf2_cu *cu)
+do_ui_file_peek_last (void *object, const char *buffer, long length)
{
- struct objfile *objfile = cu->objfile;
- struct gdbarch *gdbarch = get_objfile_arch (objfile);
- struct nextfield *new_field;
- struct attribute *attr;
- struct field *fp;
- char *fieldname = "";
+ char *last_char_p = (char *) object;
- /* Allocate a new field list entry and link it in. */
- new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
- make_cleanup (xfree, new_field);
- memset (new_field, 0, sizeof (struct nextfield));
+ if (length > 0)
+ *last_char_p = buffer[length - 1];
+}
- if (die->tag == DW_TAG_inheritance)
- {
- new_field->next = fip->baseclasses;
- fip->baseclasses = new_field;
- }
- else
- {
- new_field->next = fip->fields;
- fip->fields = new_field;
- }
- fip->nfields++;
+/* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
+ compute the physname for the object, which include a method's
+ formal parameters (C++/Java) and return type (Java).
- /* Handle accessibility and virtuality of field.
- The default accessibility for members is public, the default
- accessibility for inheritance is private. */
- if (die->tag != DW_TAG_inheritance)
- new_field->accessibility = DW_ACCESS_public;
- else
- new_field->accessibility = DW_ACCESS_private;
- new_field->virtuality = DW_VIRTUALITY_none;
+ For Ada, return the DIE's linkage name rather than the fully qualified
+ name. PHYSNAME is ignored..
- attr = dwarf2_attr (die, DW_AT_accessibility, cu);
- if (attr)
- new_field->accessibility = DW_UNSND (attr);
- if (new_field->accessibility != DW_ACCESS_public)
- fip->non_public_fields = 1;
- attr = dwarf2_attr (die, DW_AT_virtuality, cu);
- if (attr)
- new_field->virtuality = DW_UNSND (attr);
+ The result is allocated on the objfile_obstack and canonicalized. */
- fp = &new_field->field;
+static const char *
+dwarf2_compute_name (char *name, struct die_info *die, struct dwarf2_cu *cu,
+ int physname)
+{
+ if (name == NULL)
+ name = dwarf2_name (die, cu);
- if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
+ /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
+ compute it by typename_concat inside GDB. */
+ if (cu->language == language_ada
+ || (cu->language == language_fortran && physname))
{
- /* Data member other than a C++ static data member. */
-
- /* Get type of field. */
- fp->type = die_type (die, cu);
+ /* For Ada unit, we prefer the linkage name over the name, as
+ the former contains the exported name, which the user expects
+ to be able to reference. Ideally, we want the user to be able
+ to reference this entity using either natural or linkage name,
+ but we haven't started looking at this enhancement yet. */
+ struct attribute *attr;
- SET_FIELD_BITPOS (*fp, 0);
+ attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
+ if (attr == NULL)
+ attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
+ if (attr && DW_STRING (attr))
+ return DW_STRING (attr);
+ }
- /* Get bit size of field (zero if none). */
- attr = dwarf2_attr (die, DW_AT_bit_size, cu);
- if (attr)
- {
- FIELD_BITSIZE (*fp) = DW_UNSND (attr);
- }
- else
+ /* These are the only languages we know how to qualify names in. */
+ if (name != NULL
+ && (cu->language == language_cplus || cu->language == language_java
+ || cu->language == language_fortran))
+ {
+ if (die_needs_namespace (die, cu))
{
- FIELD_BITSIZE (*fp) = 0;
- }
+ long length;
+ char *prefix;
+ struct ui_file *buf;
- /* Get bit offset of field. */
- attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
- if (attr)
- {
- int byte_offset = 0;
+ prefix = determine_prefix (die, cu);
+ buf = mem_fileopen ();
+ if (*prefix != '\0')
+ {
+ char *prefixed_name = typename_concat (NULL, prefix, name,
+ physname, cu);
- if (attr_form_is_section_offset (attr))
- dwarf2_complex_location_expr_complaint ();
- else if (attr_form_is_constant (attr))
- byte_offset = dwarf2_get_attr_constant_value (attr, 0);
- else if (attr_form_is_block (attr))
- byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
+ fputs_unfiltered (prefixed_name, buf);
+ xfree (prefixed_name);
+ }
else
- dwarf2_complex_location_expr_complaint ();
-
- SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
- }
- attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
- if (attr)
- {
- if (gdbarch_bits_big_endian (gdbarch))
+ fputs_unfiltered (name, buf);
+
+ /* Template parameters may be specified in the DIE's DW_AT_name, or
+ as children with DW_TAG_template_type_param or
+ DW_TAG_value_type_param. If the latter, add them to the name
+ here. If the name already has template parameters, then
+ skip this step; some versions of GCC emit both, and
+ it is more efficient to use the pre-computed name.
+
+ Something to keep in mind about this process: it is very
+ unlikely, or in some cases downright impossible, to produce
+ something that will match the mangled name of a function.
+ If the definition of the function has the same debug info,
+ we should be able to match up with it anyway. But fallbacks
+ using the minimal symbol, for instance to find a method
+ implemented in a stripped copy of libstdc++, will not work.
+ If we do not have debug info for the definition, we will have to
+ match them up some other way.
+
+ When we do name matching there is a related problem with function
+ templates; two instantiated function templates are allowed to
+ differ only by their return types, which we do not add here. */
+
+ if (cu->language == language_cplus && strchr (name, '<') == NULL)
{
- /* For big endian bits, the DW_AT_bit_offset gives the
- additional bit offset from the MSB of the containing
- anonymous object to the MSB of the field. We don't
- have to do anything special since we don't need to
- know the size of the anonymous object. */
- FIELD_BITPOS (*fp) += DW_UNSND (attr);
- }
- else
- {
- /* For little endian bits, compute the bit offset to the
- MSB of the anonymous object, subtract off the number of
- bits from the MSB of the field to the MSB of the
- object, and then subtract off the number of bits of
- the field itself. The result is the bit offset of
- the LSB of the field. */
- int anonymous_size;
- int bit_offset = DW_UNSND (attr);
+ struct attribute *attr;
+ struct die_info *child;
+ int first = 1;
- attr = dwarf2_attr (die, DW_AT_byte_size, cu);
- if (attr)
+ die->building_fullname = 1;
+
+ for (child = die->child; child != NULL; child = child->sibling)
{
- /* The size of the anonymous object containing
- the bit field is explicit, so use the
- indicated size (in bytes). */
- anonymous_size = DW_UNSND (attr);
+ struct type *type;
+ long value;
+ gdb_byte *bytes;
+ struct dwarf2_locexpr_baton *baton;
+ struct value *v;
+
+ if (child->tag != DW_TAG_template_type_param
+ && child->tag != DW_TAG_template_value_param)
+ continue;
+
+ if (first)
+ {
+ fputs_unfiltered ("<", buf);
+ first = 0;
+ }
+ else
+ fputs_unfiltered (", ", buf);
+
+ attr = dwarf2_attr (child, DW_AT_type, cu);
+ if (attr == NULL)
+ {
+ complaint (&symfile_complaints,
+ _("template parameter missing DW_AT_type"));
+ fputs_unfiltered ("UNKNOWN_TYPE", buf);
+ continue;
+ }
+ type = die_type (child, cu);
+
+ if (child->tag == DW_TAG_template_type_param)
+ {
+ c_print_type (type, "", buf, -1, 0);
+ continue;
+ }
+
+ attr = dwarf2_attr (child, DW_AT_const_value, cu);
+ if (attr == NULL)
+ {
+ complaint (&symfile_complaints,
+ _("template parameter missing "
+ "DW_AT_const_value"));
+ fputs_unfiltered ("UNKNOWN_VALUE", buf);
+ continue;
+ }
+
+ dwarf2_const_value_attr (attr, type, name,
+ &cu->comp_unit_obstack, cu,
+ &value, &bytes, &baton);
+
+ if (TYPE_NOSIGN (type))
+ /* GDB prints characters as NUMBER 'CHAR'. If that's
+ changed, this can use value_print instead. */
+ c_printchar (value, type, buf);
+ else
+ {
+ struct value_print_options opts;
+
+ if (baton != NULL)
+ v = dwarf2_evaluate_loc_desc (type, NULL,
+ baton->data,
+ baton->size,
+ baton->per_cu);
+ else if (bytes != NULL)
+ {
+ v = allocate_value (type);
+ memcpy (value_contents_writeable (v), bytes,
+ TYPE_LENGTH (type));
+ }
+ else
+ v = value_from_longest (type, value);
+
+ /* Specify decimal so that we do not depend on
+ the radix. */
+ get_formatted_print_options (&opts, 'd');
+ opts.raw = 1;
+ value_print (v, buf, &opts);
+ release_value (v);
+ value_free (v);
+ }
}
- else
+
+ die->building_fullname = 0;
+
+ if (!first)
{
- /* The size of the anonymous object containing
- the bit field must be inferred from the type
- attribute of the data member containing the
- bit field. */
- anonymous_size = TYPE_LENGTH (fp->type);
+ /* Close the argument list, with a space if necessary
+ (nested templates). */
+ char last_char = '\0';
+ ui_file_put (buf, do_ui_file_peek_last, &last_char);
+ if (last_char == '>')
+ fputs_unfiltered (" >", buf);
+ else
+ fputs_unfiltered (">", buf);
}
- FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
- - bit_offset - FIELD_BITSIZE (*fp);
}
- }
- /* Get name of field. */
- fieldname = dwarf2_name (die, cu);
- if (fieldname == NULL)
- fieldname = "";
+ /* For Java and C++ methods, append formal parameter type
+ information, if PHYSNAME. */
- /* The name is already allocated along with this objfile, so we don't
- need to duplicate it for the type. */
- fp->name = fieldname;
+ if (physname && die->tag == DW_TAG_subprogram
+ && (cu->language == language_cplus
+ || cu->language == language_java))
+ {
+ struct type *type = read_type_die (die, cu);
- /* Change accessibility for artificial fields (e.g. virtual table
- pointer or virtual base class pointer) to private. */
- if (dwarf2_attr (die, DW_AT_artificial, cu))
- {
- FIELD_ARTIFICIAL (*fp) = 1;
- new_field->accessibility = DW_ACCESS_private;
- fip->non_public_fields = 1;
- }
- }
- else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
- {
- /* C++ static member. */
+ c_type_print_args (type, buf, 0, cu->language);
- /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
- is a declaration, but all versions of G++ as of this writing
- (so through at least 3.2.1) incorrectly generate
- DW_TAG_variable tags. */
+ if (cu->language == language_java)
+ {
+ /* For java, we must append the return type to method
+ names. */
+ if (die->tag == DW_TAG_subprogram)
+ java_print_type (TYPE_TARGET_TYPE (type), "", buf,
+ 0, 0);
+ }
+ else if (cu->language == language_cplus)
+ {
+ /* Assume that an artificial first parameter is
+ "this", but do not crash if it is not. RealView
+ marks unnamed (and thus unused) parameters as
+ artificial; there is no way to differentiate
+ the two cases. */
+ if (TYPE_NFIELDS (type) > 0
+ && TYPE_FIELD_ARTIFICIAL (type, 0)
+ && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR
+ && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type,
+ 0))))
+ fputs_unfiltered (" const", buf);
+ }
+ }
- char *physname;
+ name = ui_file_obsavestring (buf, &cu->objfile->objfile_obstack,
+ &length);
+ ui_file_delete (buf);
- /* Get name of field. */
- fieldname = dwarf2_name (die, cu);
- if (fieldname == NULL)
- return;
+ if (cu->language == language_cplus)
+ {
+ char *cname
+ = dwarf2_canonicalize_name (name, cu,
+ &cu->objfile->objfile_obstack);
- attr = dwarf2_attr (die, DW_AT_const_value, cu);
- if (attr
- /* Only create a symbol if this is an external value.
- new_symbol checks this and puts the value in the global symbol
- table, which we want. If it is not external, new_symbol
- will try to put the value in cu->list_in_scope which is wrong. */
- && dwarf2_flag_true_p (die, DW_AT_external, cu))
- {
- /* A static const member, not much different than an enum as far as
- we're concerned, except that we can support more types. */
- new_symbol (die, NULL, cu);
+ if (cname != NULL)
+ name = cname;
+ }
}
-
- /* Get physical name. */
- physname = (char *) dwarf2_physname (fieldname, die, cu);
-
- /* The name is already allocated along with this objfile, so we don't
- need to duplicate it for the type. */
- SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
- FIELD_TYPE (*fp) = die_type (die, cu);
- FIELD_NAME (*fp) = fieldname;
}
- else if (die->tag == DW_TAG_inheritance)
- {
- /* C++ base class field. */
- attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
- if (attr)
- {
- int byte_offset = 0;
-
- if (attr_form_is_section_offset (attr))
- dwarf2_complex_location_expr_complaint ();
- else if (attr_form_is_constant (attr))
- byte_offset = dwarf2_get_attr_constant_value (attr, 0);
- else if (attr_form_is_block (attr))
- byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
- else
- dwarf2_complex_location_expr_complaint ();
- SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
- }
- FIELD_BITSIZE (*fp) = 0;
- FIELD_TYPE (*fp) = die_type (die, cu);
- FIELD_NAME (*fp) = type_name_no_tag (fp->type);
- fip->nbaseclasses++;
- }
+ return name;
}
-/* Add a typedef defined in the scope of the FIP's class. */
-
-static void
-dwarf2_add_typedef (struct field_info *fip, struct die_info *die,
- struct dwarf2_cu *cu)
-{
- struct objfile *objfile = cu->objfile;
- struct gdbarch *gdbarch = get_objfile_arch (objfile);
- struct typedef_field_list *new_field;
- struct attribute *attr;
- struct typedef_field *fp;
- char *fieldname = "";
-
- /* Allocate a new field list entry and link it in. */
- new_field = xzalloc (sizeof (*new_field));
- make_cleanup (xfree, new_field);
+/* Return the fully qualified name of DIE, based on its DW_AT_name.
+ If scope qualifiers are appropriate they will be added. The result
+ will be allocated on the objfile_obstack, or NULL if the DIE does
+ not have a name. NAME may either be from a previous call to
+ dwarf2_name or NULL.
- gdb_assert (die->tag == DW_TAG_typedef);
+ The output string will be canonicalized (if C++/Java). */
- fp = &new_field->field;
+static const char *
+dwarf2_full_name (char *name, struct die_info *die, struct dwarf2_cu *cu)
+{
+ return dwarf2_compute_name (name, die, cu, 0);
+}
- /* Get name of field. */
- fp->name = dwarf2_name (die, cu);
- if (fp->name == NULL)
- return;
+/* Construct a physname for the given DIE in CU. NAME may either be
+ from a previous call to dwarf2_name or NULL. The result will be
+ allocated on the objfile_objstack or NULL if the DIE does not have a
+ name.
- fp->type = read_type_die (die, cu);
+ The output string will be canonicalized (if C++/Java). */
- new_field->next = fip->typedef_field_list;
- fip->typedef_field_list = new_field;
- fip->typedef_field_list_count++;
+static const char *
+dwarf2_physname (char *name, struct die_info *die, struct dwarf2_cu *cu)
+{
+ return dwarf2_compute_name (name, die, cu, 1);
}
-/* Create the vector of fields, and attach it to the type. */
+/* Read the import statement specified by the given die and record it. */
static void
-dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
- struct dwarf2_cu *cu)
+read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
{
- int nfields = fip->nfields;
+ struct attribute *import_attr;
+ struct die_info *imported_die;
+ struct dwarf2_cu *imported_cu;
+ const char *imported_name;
+ const char *imported_name_prefix;
+ const char *canonical_name;
+ const char *import_alias;
+ const char *imported_declaration = NULL;
+ const char *import_prefix;
- /* Record the field count, allocate space for the array of fields,
- and create blank accessibility bitfields if necessary. */
- TYPE_NFIELDS (type) = nfields;
- TYPE_FIELDS (type) = (struct field *)
- TYPE_ALLOC (type, sizeof (struct field) * nfields);
- memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
+ char *temp;
- if (fip->non_public_fields && cu->language != language_ada)
+ import_attr = dwarf2_attr (die, DW_AT_import, cu);
+ if (import_attr == NULL)
{
- ALLOCATE_CPLUS_STRUCT_TYPE (type);
-
- TYPE_FIELD_PRIVATE_BITS (type) =
- (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
- B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
-
- TYPE_FIELD_PROTECTED_BITS (type) =
- (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
- B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
-
- TYPE_FIELD_IGNORE_BITS (type) =
- (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
- B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
+ complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
+ dwarf_tag_name (die->tag));
+ return;
}
- /* If the type has baseclasses, allocate and clear a bit vector for
- TYPE_FIELD_VIRTUAL_BITS. */
- if (fip->nbaseclasses && cu->language != language_ada)
+ imported_cu = cu;
+ imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu);
+ imported_name = dwarf2_name (imported_die, imported_cu);
+ if (imported_name == NULL)
{
- int num_bytes = B_BYTES (fip->nbaseclasses);
- unsigned char *pointer;
+ /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
- ALLOCATE_CPLUS_STRUCT_TYPE (type);
- pointer = TYPE_ALLOC (type, num_bytes);
- TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
- B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
- TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
- }
+ The import in the following code:
+ namespace A
+ {
+ typedef int B;
+ }
- /* Copy the saved-up fields into the field vector. Start from the head
- of the list, adding to the tail of the field array, so that they end
- up in the same order in the array in which they were added to the list. */
- while (nfields-- > 0)
- {
- struct nextfield *fieldp;
+ int main ()
+ {
+ using A::B;
+ B b;
+ return b;
+ }
- if (fip->fields)
- {
- fieldp = fip->fields;
- fip->fields = fieldp->next;
- }
- else
- {
- fieldp = fip->baseclasses;
- fip->baseclasses = fieldp->next;
- }
+ ...
+ <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
+ <52> DW_AT_decl_file : 1
+ <53> DW_AT_decl_line : 6
+ <54> DW_AT_import : <0x75>
+ <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
+ <59> DW_AT_name : B
+ <5b> DW_AT_decl_file : 1
+ <5c> DW_AT_decl_line : 2
+ <5d> DW_AT_type : <0x6e>
+ ...
+ <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
+ <76> DW_AT_byte_size : 4
+ <77> DW_AT_encoding : 5 (signed)
- TYPE_FIELD (type, nfields) = fieldp->field;
- switch (fieldp->accessibility)
- {
- case DW_ACCESS_private:
- if (cu->language != language_ada)
- SET_TYPE_FIELD_PRIVATE (type, nfields);
- break;
+ imports the wrong die ( 0x75 instead of 0x58 ).
+ This case will be ignored until the gcc bug is fixed. */
+ return;
+ }
- case DW_ACCESS_protected:
- if (cu->language != language_ada)
- SET_TYPE_FIELD_PROTECTED (type, nfields);
- break;
+ /* Figure out the local name after import. */
+ import_alias = dwarf2_name (die, cu);
- case DW_ACCESS_public:
- break;
+ /* Figure out where the statement is being imported to. */
+ import_prefix = determine_prefix (die, cu);
- default:
- /* Unknown accessibility. Complain and treat it as public. */
- {
- complaint (&symfile_complaints, _("unsupported accessibility %d"),
- fieldp->accessibility);
- }
- break;
- }
- if (nfields < fip->nbaseclasses)
- {
- switch (fieldp->virtuality)
- {
- case DW_VIRTUALITY_virtual:
- case DW_VIRTUALITY_pure_virtual:
- if (cu->language == language_ada)
- error ("unexpected virtuality in component of Ada type");
- SET_TYPE_FIELD_VIRTUAL (type, nfields);
- break;
- }
- }
+ /* Figure out what the scope of the imported die is and prepend it
+ to the name of the imported die. */
+ imported_name_prefix = determine_prefix (imported_die, imported_cu);
+
+ if (imported_die->tag != DW_TAG_namespace
+ && imported_die->tag != DW_TAG_module)
+ {
+ imported_declaration = imported_name;
+ canonical_name = imported_name_prefix;
+ }
+ else if (strlen (imported_name_prefix) > 0)
+ {
+ temp = alloca (strlen (imported_name_prefix)
+ + 2 + strlen (imported_name) + 1);
+ strcpy (temp, imported_name_prefix);
+ strcat (temp, "::");
+ strcat (temp, imported_name);
+ canonical_name = temp;
}
+ else
+ canonical_name = imported_name;
+
+ cp_add_using_directive (import_prefix,
+ canonical_name,
+ import_alias,
+ imported_declaration,
+ &cu->objfile->objfile_obstack);
}
-/* Add a member function to the proper fieldlist. */
+static void
+initialize_cu_func_list (struct dwarf2_cu *cu)
+{
+ cu->first_fn = cu->last_fn = cu->cached_fn = NULL;
+}
+
+/* Cleanup function for read_file_scope. */
static void
-dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
- struct type *type, struct dwarf2_cu *cu)
+free_cu_line_header (void *arg)
{
- struct objfile *objfile = cu->objfile;
- struct attribute *attr;
- struct fnfieldlist *flp;
- int i;
- struct fn_field *fnp;
- char *fieldname;
- char *physname;
- struct nextfnfield *new_fnfield;
- struct type *this_type;
+ struct dwarf2_cu *cu = arg;
- if (cu->language == language_ada)
- error ("unexpected member function in Ada type");
+ free_line_header (cu->line_header);
+ cu->line_header = NULL;
+}
- /* Get name of member function. */
- fieldname = dwarf2_name (die, cu);
- if (fieldname == NULL)
- return;
+static void
+find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu,
+ char **name, char **comp_dir)
+{
+ struct attribute *attr;
- /* Get the mangled name. */
- physname = (char *) dwarf2_physname (fieldname, die, cu);
+ *name = NULL;
+ *comp_dir = NULL;
- /* Look up member function name in fieldlist. */
- for (i = 0; i < fip->nfnfields; i++)
+ /* Find the filename. Do not use dwarf2_name here, since the filename
+ is not a source language identifier. */
+ attr = dwarf2_attr (die, DW_AT_name, cu);
+ if (attr)
{
- if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
- break;
+ *name = DW_STRING (attr);
}
- /* Create new list element if necessary. */
- if (i < fip->nfnfields)
- flp = &fip->fnfieldlists[i];
- else
+ attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
+ if (attr)
+ *comp_dir = DW_STRING (attr);
+ else if (*name != NULL && IS_ABSOLUTE_PATH (*name))
{
- if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
- {
- fip->fnfieldlists = (struct fnfieldlist *)
- xrealloc (fip->fnfieldlists,
- (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
- * sizeof (struct fnfieldlist));
- if (fip->nfnfields == 0)
- make_cleanup (free_current_contents, &fip->fnfieldlists);
- }
- flp = &fip->fnfieldlists[fip->nfnfields];
- flp->name = fieldname;
- flp->length = 0;
- flp->head = NULL;
- fip->nfnfields++;
+ *comp_dir = ldirname (*name);
+ if (*comp_dir != NULL)
+ make_cleanup (xfree, *comp_dir);
}
+ if (*comp_dir != NULL)
+ {
+ /* Irix 6.2 native cc prepends <machine>.: to the compilation
+ directory, get rid of it. */
+ char *cp = strchr (*comp_dir, ':');
- /* Create a new member function field and chain it to the field list
- entry. */
- new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
- make_cleanup (xfree, new_fnfield);
- memset (new_fnfield, 0, sizeof (struct nextfnfield));
- new_fnfield->next = flp->head;
- flp->head = new_fnfield;
- flp->length++;
+ if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/')
+ *comp_dir = cp + 1;
+ }
- /* Fill in the member function field info. */
- fnp = &new_fnfield->fnfield;
- /* The name is already allocated along with this objfile, so we don't
- need to duplicate it for the type. */
- fnp->physname = physname ? physname : "";
- fnp->type = alloc_type (objfile);
- this_type = read_type_die (die, cu);
- if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC)
- {
- int nparams = TYPE_NFIELDS (this_type);
+ if (*name == NULL)
+ *name = "<unknown>";
+}
- /* TYPE is the domain of this method, and THIS_TYPE is the type
- of the method itself (TYPE_CODE_METHOD). */
- smash_to_method_type (fnp->type, type,
- TYPE_TARGET_TYPE (this_type),
- TYPE_FIELDS (this_type),
- TYPE_NFIELDS (this_type),
- TYPE_VARARGS (this_type));
+/* Process DW_TAG_compile_unit. */
- /* Handle static member functions.
- Dwarf2 has no clean way to discern C++ static and non-static
- member functions. G++ helps GDB by marking the first
- parameter for non-static member functions (which is the
- this pointer) as artificial. We obtain this information
- from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
- if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0)
- fnp->voffset = VOFFSET_STATIC;
- }
- else
- complaint (&symfile_complaints, _("member function type missing for '%s'"),
- physname);
+static void
+read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ struct cleanup *back_to = make_cleanup (null_cleanup, 0);
+ CORE_ADDR lowpc = ((CORE_ADDR) -1);
+ CORE_ADDR highpc = ((CORE_ADDR) 0);
+ struct attribute *attr;
+ char *name = NULL;
+ char *comp_dir = NULL;
+ struct die_info *child_die;
+ bfd *abfd = objfile->obfd;
+ struct line_header *line_header = 0;
+ CORE_ADDR baseaddr;
- /* Get fcontext from DW_AT_containing_type if present. */
- if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
- fnp->fcontext = die_containing_type (die, cu);
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
- /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
- and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
+ get_scope_pc_bounds (die, &lowpc, &highpc, cu);
- /* Get accessibility. */
- attr = dwarf2_attr (die, DW_AT_accessibility, cu);
+ /* If we didn't find a lowpc, set it to highpc to avoid complaints
+ from finish_block. */
+ if (lowpc == ((CORE_ADDR) -1))
+ lowpc = highpc;
+ lowpc += baseaddr;
+ highpc += baseaddr;
+
+ find_file_and_directory (die, cu, &name, &comp_dir);
+
+ attr = dwarf2_attr (die, DW_AT_language, cu);
if (attr)
{
- switch (DW_UNSND (attr))
- {
- case DW_ACCESS_private:
- fnp->is_private = 1;
- break;
- case DW_ACCESS_protected:
- fnp->is_protected = 1;
- break;
- }
+ set_cu_language (DW_UNSND (attr), cu);
}
- /* Check for artificial methods. */
- attr = dwarf2_attr (die, DW_AT_artificial, cu);
- if (attr && DW_UNSND (attr) != 0)
- fnp->is_artificial = 1;
+ attr = dwarf2_attr (die, DW_AT_producer, cu);
+ if (attr)
+ cu->producer = DW_STRING (attr);
- /* Get index in virtual function table if it is a virtual member
- function. For older versions of GCC, this is an offset in the
- appropriate virtual table, as specified by DW_AT_containing_type.
- For everyone else, it is an expression to be evaluated relative
- to the object address. */
+ /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
+ standardised yet. As a workaround for the language detection we fall
+ back to the DW_AT_producer string. */
+ if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL)
+ cu->language = language_opencl;
- attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
- if (attr)
- {
- if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0)
- {
- if (DW_BLOCK (attr)->data[0] == DW_OP_constu)
- {
- /* Old-style GCC. */
- fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
- }
- else if (DW_BLOCK (attr)->data[0] == DW_OP_deref
- || (DW_BLOCK (attr)->size > 1
- && DW_BLOCK (attr)->data[0] == DW_OP_deref_size
- && DW_BLOCK (attr)->data[1] == cu->header.addr_size))
- {
- struct dwarf_block blk;
- int offset;
+ /* We assume that we're processing GCC output. */
+ processing_gcc_compilation = 2;
- offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref
- ? 1 : 2);
- blk.size = DW_BLOCK (attr)->size - offset;
- blk.data = DW_BLOCK (attr)->data + offset;
- fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu);
- if ((fnp->voffset % cu->header.addr_size) != 0)
- dwarf2_complex_location_expr_complaint ();
- else
- fnp->voffset /= cu->header.addr_size;
- fnp->voffset += 2;
- }
- else
- dwarf2_complex_location_expr_complaint ();
+ processing_has_namespace_info = 0;
- if (!fnp->fcontext)
- fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0));
- }
- else if (attr_form_is_section_offset (attr))
- {
- dwarf2_complex_location_expr_complaint ();
- }
- else
+ start_symtab (name, comp_dir, lowpc);
+ record_debugformat ("DWARF 2");
+ record_producer (cu->producer);
+
+ initialize_cu_func_list (cu);
+
+ /* Decode line number information if present. We do this before
+ processing child DIEs, so that the line header table is available
+ for DW_AT_decl_file. */
+ attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
+ if (attr)
+ {
+ unsigned int line_offset = DW_UNSND (attr);
+ line_header = dwarf_decode_line_header (line_offset, abfd, cu);
+ if (line_header)
{
- dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
- fieldname);
+ cu->line_header = line_header;
+ make_cleanup (free_cu_line_header, cu);
+ dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL);
}
}
- else
+
+ /* Process all dies in compilation unit. */
+ if (die->child != NULL)
{
- attr = dwarf2_attr (die, DW_AT_virtuality, cu);
- if (attr && DW_UNSND (attr))
+ child_die = die->child;
+ while (child_die && child_die->tag)
{
- /* GCC does this, as of 2008-08-25; PR debug/37237. */
- complaint (&symfile_complaints,
- _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
- fieldname, die->offset);
- ALLOCATE_CPLUS_STRUCT_TYPE (type);
- TYPE_CPLUS_DYNAMIC (type) = 1;
+ process_die (child_die, cu);
+ child_die = sibling_die (child_die);
}
}
+
+ /* Decode macro information, if present. Dwarf 2 macro information
+ refers to information in the line number info statement program
+ header, so we can only read it if we've read the header
+ successfully. */
+ attr = dwarf2_attr (die, DW_AT_macro_info, cu);
+ if (attr && line_header)
+ {
+ unsigned int macro_offset = DW_UNSND (attr);
+
+ dwarf_decode_macros (line_header, macro_offset,
+ comp_dir, abfd, cu);
+ }
+ do_cleanups (back_to);
}
-/* Create the vector of member function fields, and attach it to the type. */
+/* Process DW_TAG_type_unit.
+ For TUs we want to skip the first top level sibling if it's not the
+ actual type being defined by this TU. In this case the first top
+ level sibling is there to provide context only. */
static void
-dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
- struct dwarf2_cu *cu)
+read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
{
- struct fnfieldlist *flp;
- int total_length = 0;
- int i;
+ struct objfile *objfile = cu->objfile;
+ struct cleanup *back_to = make_cleanup (null_cleanup, 0);
+ CORE_ADDR lowpc;
+ struct attribute *attr;
+ char *name = NULL;
+ char *comp_dir = NULL;
+ struct die_info *child_die;
+ bfd *abfd = objfile->obfd;
- if (cu->language == language_ada)
- error ("unexpected member functions in Ada type");
+ /* start_symtab needs a low pc, but we don't really have one.
+ Do what read_file_scope would do in the absence of such info. */
+ lowpc = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
- ALLOCATE_CPLUS_STRUCT_TYPE (type);
- TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
- TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
+ /* Find the filename. Do not use dwarf2_name here, since the filename
+ is not a source language identifier. */
+ attr = dwarf2_attr (die, DW_AT_name, cu);
+ if (attr)
+ name = DW_STRING (attr);
- for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
+ attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
+ if (attr)
+ comp_dir = DW_STRING (attr);
+ else if (name != NULL && IS_ABSOLUTE_PATH (name))
{
- struct nextfnfield *nfp = flp->head;
- struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
- int k;
+ comp_dir = ldirname (name);
+ if (comp_dir != NULL)
+ make_cleanup (xfree, comp_dir);
+ }
- TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
- TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
- fn_flp->fn_fields = (struct fn_field *)
- TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
- for (k = flp->length; (k--, nfp); nfp = nfp->next)
- fn_flp->fn_fields[k] = nfp->fnfield;
+ if (name == NULL)
+ name = "<unknown>";
- total_length += flp->length;
+ attr = dwarf2_attr (die, DW_AT_language, cu);
+ if (attr)
+ set_cu_language (DW_UNSND (attr), cu);
+
+ /* This isn't technically needed today. It is done for symmetry
+ with read_file_scope. */
+ attr = dwarf2_attr (die, DW_AT_producer, cu);
+ if (attr)
+ cu->producer = DW_STRING (attr);
+
+ /* We assume that we're processing GCC output. */
+ processing_gcc_compilation = 2;
+
+ processing_has_namespace_info = 0;
+
+ start_symtab (name, comp_dir, lowpc);
+ record_debugformat ("DWARF 2");
+ record_producer (cu->producer);
+
+ /* Process the dies in the type unit. */
+ if (die->child == NULL)
+ {
+ dump_die_for_error (die);
+ error (_("Dwarf Error: Missing children for type unit [in module %s]"),
+ bfd_get_filename (abfd));
}
- TYPE_NFN_FIELDS (type) = fip->nfnfields;
- TYPE_NFN_FIELDS_TOTAL (type) = total_length;
+ child_die = die->child;
+
+ while (child_die && child_die->tag)
+ {
+ process_die (child_die, cu);
+
+ child_die = sibling_die (child_die);
+ }
+
+ do_cleanups (back_to);
}
-/* Returns non-zero if NAME is the name of a vtable member in CU's
- language, zero otherwise. */
-static int
-is_vtable_name (const char *name, struct dwarf2_cu *cu)
+static void
+add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc,
+ struct dwarf2_cu *cu)
{
- static const char vptr[] = "_vptr";
- static const char vtable[] = "vtable";
+ struct function_range *thisfn;
- /* Look for the C++ and Java forms of the vtable. */
- if ((cu->language == language_java
- && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
- || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
- && is_cplus_marker (name[sizeof (vptr) - 1])))
- return 1;
+ thisfn = (struct function_range *)
+ obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range));
+ thisfn->name = name;
+ thisfn->lowpc = lowpc;
+ thisfn->highpc = highpc;
+ thisfn->seen_line = 0;
+ thisfn->next = NULL;
- return 0;
-}
+ if (cu->last_fn == NULL)
+ cu->first_fn = thisfn;
+ else
+ cu->last_fn->next = thisfn;
-/* GCC outputs unnamed structures that are really pointers to member
- functions, with the ABI-specified layout. If TYPE describes
- such a structure, smash it into a member function type.
+ cu->last_fn = thisfn;
+}
- GCC shouldn't do this; it should just output pointer to member DIEs.
- This is GCC PR debug/28767. */
+/* qsort helper for inherit_abstract_dies. */
-static void
-quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile)
+static int
+unsigned_int_compar (const void *ap, const void *bp)
{
- struct type *pfn_type, *domain_type, *new_type;
+ unsigned int a = *(unsigned int *) ap;
+ unsigned int b = *(unsigned int *) bp;
- /* Check for a structure with no name and two children. */
- if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2)
- return;
+ return (a > b) - (b > a);
+}
- /* Check for __pfn and __delta members. */
- if (TYPE_FIELD_NAME (type, 0) == NULL
- || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0
- || TYPE_FIELD_NAME (type, 1) == NULL
- || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0)
- return;
+/* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
+ Inherit only the children of the DW_AT_abstract_origin DIE not being
+ already referenced by DW_AT_abstract_origin from the children of the
+ current DIE. */
- /* Find the type of the method. */
- pfn_type = TYPE_FIELD_TYPE (type, 0);
- if (pfn_type == NULL
- || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
- || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
- return;
+static void
+inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct die_info *child_die;
+ unsigned die_children_count;
+ /* CU offsets which were referenced by children of the current DIE. */
+ unsigned *offsets;
+ unsigned *offsets_end, *offsetp;
+ /* Parent of DIE - referenced by DW_AT_abstract_origin. */
+ struct die_info *origin_die;
+ /* Iterator of the ORIGIN_DIE children. */
+ struct die_info *origin_child_die;
+ struct cleanup *cleanups;
+ struct attribute *attr;
+ struct dwarf2_cu *origin_cu;
+ struct pending **origin_previous_list_in_scope;
- /* Look for the "this" argument. */
- pfn_type = TYPE_TARGET_TYPE (pfn_type);
- if (TYPE_NFIELDS (pfn_type) == 0
- /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
- || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
+ attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
+ if (!attr)
return;
- domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
- new_type = alloc_type (objfile);
- smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type),
- TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
- TYPE_VARARGS (pfn_type));
- smash_to_methodptr_type (type, new_type);
-}
+ /* Note that following die references may follow to a die in a
+ different cu. */
-/* Called when we find the DIE that starts a structure or union scope
- (definition) to process all dies that define the members of the
- structure or union.
+ origin_cu = cu;
+ origin_die = follow_die_ref (die, attr, &origin_cu);
- NOTE: we need to call struct_type regardless of whether or not the
- DIE has an at_name attribute, since it might be an anonymous
- structure or union. This gets the type entered into our set of
- user defined types.
-
- However, if the structure is incomplete (an opaque struct/union)
- then suppress creating a symbol table entry for it since gdb only
- wants to find the one with the complete definition. Note that if
- it is complete, we just call new_symbol, which does it's own
- checking about whether the struct/union is anonymous or not (and
- suppresses creating a symbol table entry itself). */
+ /* We're inheriting ORIGIN's children into the scope we'd put DIE's
+ symbols in. */
+ origin_previous_list_in_scope = origin_cu->list_in_scope;
+ origin_cu->list_in_scope = cu->list_in_scope;
-static struct type *
-read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
-{
- struct objfile *objfile = cu->objfile;
- struct type *type;
- struct attribute *attr;
- char *name;
- struct cleanup *back_to;
+ if (die->tag != origin_die->tag
+ && !(die->tag == DW_TAG_inlined_subroutine
+ && origin_die->tag == DW_TAG_subprogram))
+ complaint (&symfile_complaints,
+ _("DIE 0x%x and its abstract origin 0x%x have different tags"),
+ die->offset, origin_die->offset);
- /* If the definition of this type lives in .debug_types, read that type.
- Don't follow DW_AT_specification though, that will take us back up
- the chain and we want to go down. */
- attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
- if (attr)
+ child_die = die->child;
+ die_children_count = 0;
+ while (child_die && child_die->tag)
{
- struct dwarf2_cu *type_cu = cu;
- struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
-
- /* We could just recurse on read_structure_type, but we need to call
- get_die_type to ensure only one type for this DIE is created.
- This is important, for example, because for c++ classes we need
- TYPE_NAME set which is only done by new_symbol. Blech. */
- type = read_type_die (type_die, type_cu);
- return set_die_type (die, type, cu);
+ child_die = sibling_die (child_die);
+ die_children_count++;
}
+ offsets = xmalloc (sizeof (*offsets) * die_children_count);
+ cleanups = make_cleanup (xfree, offsets);
- back_to = make_cleanup (null_cleanup, 0);
-
- type = alloc_type (objfile);
- INIT_CPLUS_SPECIFIC (type);
-
- name = dwarf2_name (die, cu);
- if (name != NULL)
+ offsets_end = offsets;
+ child_die = die->child;
+ while (child_die && child_die->tag)
{
- if (cu->language == language_cplus
- || cu->language == language_java)
+ /* For each CHILD_DIE, find the corresponding child of
+ ORIGIN_DIE. If there is more than one layer of
+ DW_AT_abstract_origin, follow them all; there shouldn't be,
+ but GCC versions at least through 4.4 generate this (GCC PR
+ 40573). */
+ struct die_info *child_origin_die = child_die;
+ struct dwarf2_cu *child_origin_cu = cu;
+
+ while (1)
{
- TYPE_TAG_NAME (type) = (char *) dwarf2_full_name (name, die, cu);
- if (die->tag == DW_TAG_structure_type
- || die->tag == DW_TAG_class_type)
- TYPE_NAME (type) = TYPE_TAG_NAME (type);
+ attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin,
+ child_origin_cu);
+ if (attr == NULL)
+ break;
+ child_origin_die = follow_die_ref (child_origin_die, attr,
+ &child_origin_cu);
}
- else
+
+ /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
+ counterpart may exist. */
+ if (child_origin_die != child_die)
{
- /* The name is already allocated along with this objfile, so
- we don't need to duplicate it for the type. */
- TYPE_TAG_NAME (type) = (char *) name;
- if (die->tag == DW_TAG_class_type)
- TYPE_NAME (type) = TYPE_TAG_NAME (type);
+ if (child_die->tag != child_origin_die->tag
+ && !(child_die->tag == DW_TAG_inlined_subroutine
+ && child_origin_die->tag == DW_TAG_subprogram))
+ complaint (&symfile_complaints,
+ _("Child DIE 0x%x and its abstract origin 0x%x have "
+ "different tags"), child_die->offset,
+ child_origin_die->offset);
+ if (child_origin_die->parent != origin_die)
+ complaint (&symfile_complaints,
+ _("Child DIE 0x%x and its abstract origin 0x%x have "
+ "different parents"), child_die->offset,
+ child_origin_die->offset);
+ else
+ *offsets_end++ = child_origin_die->offset;
}
+ child_die = sibling_die (child_die);
}
+ qsort (offsets, offsets_end - offsets, sizeof (*offsets),
+ unsigned_int_compar);
+ for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++)
+ if (offsetp[-1] == *offsetp)
+ complaint (&symfile_complaints,
+ _("Multiple children of DIE 0x%x refer "
+ "to DIE 0x%x as their abstract origin"),
+ die->offset, *offsetp);
- if (die->tag == DW_TAG_structure_type)
- {
- TYPE_CODE (type) = TYPE_CODE_STRUCT;
- }
- else if (die->tag == DW_TAG_union_type)
+ offsetp = offsets;
+ origin_child_die = origin_die->child;
+ while (origin_child_die && origin_child_die->tag)
{
- TYPE_CODE (type) = TYPE_CODE_UNION;
+ /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
+ while (offsetp < offsets_end && *offsetp < origin_child_die->offset)
+ offsetp++;
+ if (offsetp >= offsets_end || *offsetp > origin_child_die->offset)
+ {
+ /* Found that ORIGIN_CHILD_DIE is really not referenced. */
+ process_die (origin_child_die, origin_cu);
+ }
+ origin_child_die = sibling_die (origin_child_die);
}
- else
+ origin_cu->list_in_scope = origin_previous_list_in_scope;
+
+ do_cleanups (cleanups);
+}
+
+static void
+read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ struct context_stack *new;
+ CORE_ADDR lowpc;
+ CORE_ADDR highpc;
+ struct die_info *child_die;
+ struct attribute *attr, *call_line, *call_file;
+ char *name;
+ CORE_ADDR baseaddr;
+ struct block *block;
+ int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
+ VEC (symbolp) *template_args = NULL;
+ struct template_symbol *templ_func = NULL;
+
+ if (inlined_func)
{
- TYPE_CODE (type) = TYPE_CODE_CLASS;
+ /* If we do not have call site information, we can't show the
+ caller of this inlined function. That's too confusing, so
+ only use the scope for local variables. */
+ call_line = dwarf2_attr (die, DW_AT_call_line, cu);
+ call_file = dwarf2_attr (die, DW_AT_call_file, cu);
+ if (call_line == NULL || call_file == NULL)
+ {
+ read_lexical_block_scope (die, cu);
+ return;
+ }
}
- if (cu->language == language_cplus && die->tag == DW_TAG_class_type)
- TYPE_DECLARED_CLASS (type) = 1;
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
- attr = dwarf2_attr (die, DW_AT_byte_size, cu);
- if (attr)
+ name = dwarf2_name (die, cu);
+
+ /* Ignore functions with missing or empty names. These are actually
+ illegal according to the DWARF standard. */
+ if (name == NULL)
{
- TYPE_LENGTH (type) = DW_UNSND (attr);
+ complaint (&symfile_complaints,
+ _("missing name for subprogram DIE at %d"), die->offset);
+ return;
}
- else
+
+ /* Ignore functions with missing or invalid low and high pc attributes. */
+ if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
{
- TYPE_LENGTH (type) = 0;
+ attr = dwarf2_attr (die, DW_AT_external, cu);
+ if (!attr || !DW_UNSND (attr))
+ complaint (&symfile_complaints,
+ _("cannot get low and high bounds "
+ "for subprogram DIE at %d"),
+ die->offset);
+ return;
}
- TYPE_STUB_SUPPORTED (type) = 1;
- if (die_is_declaration (die, cu))
- TYPE_STUB (type) = 1;
- else if (attr == NULL && die->child == NULL
- && producer_is_realview (cu->producer))
- /* RealView does not output the required DW_AT_declaration
- on incomplete types. */
- TYPE_STUB (type) = 1;
-
- /* We need to add the type field to the die immediately so we don't
- infinitely recurse when dealing with pointers to the structure
- type within the structure itself. */
- set_die_type (die, type, cu);
+ lowpc += baseaddr;
+ highpc += baseaddr;
- /* set_die_type should be already done. */
- set_descriptive_type (type, die, cu);
+ /* Record the function range for dwarf_decode_lines. */
+ add_to_cu_func_list (name, lowpc, highpc, cu);
- if (die->child != NULL && ! die_is_declaration (die, cu))
+ /* If we have any template arguments, then we must allocate a
+ different sort of symbol. */
+ for (child_die = die->child; child_die; child_die = sibling_die (child_die))
{
- struct field_info fi;
- struct die_info *child_die;
+ if (child_die->tag == DW_TAG_template_type_param
+ || child_die->tag == DW_TAG_template_value_param)
+ {
+ templ_func = OBSTACK_ZALLOC (&objfile->objfile_obstack,
+ struct template_symbol);
+ templ_func->base.is_cplus_template_function = 1;
+ break;
+ }
+ }
- memset (&fi, 0, sizeof (struct field_info));
+ new = push_context (0, lowpc);
+ new->name = new_symbol_full (die, read_type_die (die, cu), cu,
+ (struct symbol *) templ_func);
- child_die = die->child;
+ /* If there is a location expression for DW_AT_frame_base, record
+ it. */
+ attr = dwarf2_attr (die, DW_AT_frame_base, cu);
+ if (attr)
+ /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
+ expression is being recorded directly in the function's symbol
+ and not in a separate frame-base object. I guess this hack is
+ to avoid adding some sort of frame-base adjunct/annex to the
+ function's symbol :-(. The problem with doing this is that it
+ results in a function symbol with a location expression that
+ has nothing to do with the location of the function, ouch! The
+ relationship should be: a function's symbol has-a frame base; a
+ frame-base has-a location expression. */
+ dwarf2_symbol_mark_computed (attr, new->name, cu);
+
+ cu->list_in_scope = &local_symbols;
+ if (die->child != NULL)
+ {
+ child_die = die->child;
while (child_die && child_die->tag)
{
- if (child_die->tag == DW_TAG_member
- || child_die->tag == DW_TAG_variable)
- {
- /* NOTE: carlton/2002-11-05: A C++ static data member
- should be a DW_TAG_member that is a declaration, but
- all versions of G++ as of this writing (so through at
- least 3.2.1) incorrectly generate DW_TAG_variable
- tags for them instead. */
- dwarf2_add_field (&fi, child_die, cu);
- }
- else if (child_die->tag == DW_TAG_subprogram)
- {
- /* C++ member function. */
- dwarf2_add_member_fn (&fi, child_die, type, cu);
- }
- else if (child_die->tag == DW_TAG_inheritance)
+ if (child_die->tag == DW_TAG_template_type_param
+ || child_die->tag == DW_TAG_template_value_param)
{
- /* C++ base class field. */
- dwarf2_add_field (&fi, child_die, cu);
+ struct symbol *arg = new_symbol (child_die, NULL, cu);
+
+ if (arg != NULL)
+ VEC_safe_push (symbolp, template_args, arg);
}
- else if (child_die->tag == DW_TAG_typedef)
- dwarf2_add_typedef (&fi, child_die, cu);
+ else
+ process_die (child_die, cu);
child_die = sibling_die (child_die);
}
+ }
- /* Attach fields and member functions to the type. */
- if (fi.nfields)
- dwarf2_attach_fields_to_type (&fi, type, cu);
- if (fi.nfnfields)
- {
- dwarf2_attach_fn_fields_to_type (&fi, type, cu);
-
- /* Get the type which refers to the base class (possibly this
- class itself) which contains the vtable pointer for the current
- class from the DW_AT_containing_type attribute. This use of
- DW_AT_containing_type is a GNU extension. */
-
- if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
- {
- struct type *t = die_containing_type (die, cu);
+ inherit_abstract_dies (die, cu);
- TYPE_VPTR_BASETYPE (type) = t;
- if (type == t)
- {
- int i;
-
- /* Our own class provides vtbl ptr. */
- for (i = TYPE_NFIELDS (t) - 1;
- i >= TYPE_N_BASECLASSES (t);
- --i)
- {
- char *fieldname = TYPE_FIELD_NAME (t, i);
-
- if (is_vtable_name (fieldname, cu))
- {
- TYPE_VPTR_FIELDNO (type) = i;
- break;
- }
- }
+ /* If we have a DW_AT_specification, we might need to import using
+ directives from the context of the specification DIE. See the
+ comment in determine_prefix. */
+ if (cu->language == language_cplus
+ && dwarf2_attr (die, DW_AT_specification, cu))
+ {
+ struct dwarf2_cu *spec_cu = cu;
+ struct die_info *spec_die = die_specification (die, &spec_cu);
- /* Complain if virtual function table field not found. */
- if (i < TYPE_N_BASECLASSES (t))
- complaint (&symfile_complaints,
- _("virtual function table pointer not found when defining class '%s'"),
- TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
- "");
- }
- else
- {
- TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
- }
- }
- else if (cu->producer
- && strncmp (cu->producer,
- "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
+ while (spec_die)
+ {
+ child_die = spec_die->child;
+ while (child_die && child_die->tag)
{
- /* The IBM XLC compiler does not provide direct indication
- of the containing type, but the vtable pointer is
- always named __vfp. */
-
- int i;
-
- for (i = TYPE_NFIELDS (type) - 1;
- i >= TYPE_N_BASECLASSES (type);
- --i)
- {
- if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
- {
- TYPE_VPTR_FIELDNO (type) = i;
- TYPE_VPTR_BASETYPE (type) = type;
- break;
- }
- }
+ if (child_die->tag == DW_TAG_imported_module)
+ process_die (child_die, spec_cu);
+ child_die = sibling_die (child_die);
}
+
+ /* In some cases, GCC generates specification DIEs that
+ themselves contain DW_AT_specification attributes. */
+ spec_die = die_specification (spec_die, &spec_cu);
}
+ }
- /* Copy fi.typedef_field_list linked list elements content into the
- allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
- if (fi.typedef_field_list)
- {
- int i = fi.typedef_field_list_count;
+ new = pop_context ();
+ /* Make a block for the local symbols within. */
+ block = finish_block (new->name, &local_symbols, new->old_blocks,
+ lowpc, highpc, objfile);
- ALLOCATE_CPLUS_STRUCT_TYPE (type);
- TYPE_TYPEDEF_FIELD_ARRAY (type)
- = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i);
- TYPE_TYPEDEF_FIELD_COUNT (type) = i;
+ /* For C++, set the block's scope. */
+ if (cu->language == language_cplus || cu->language == language_fortran)
+ cp_set_block_scope (new->name, block, &objfile->objfile_obstack,
+ determine_prefix (die, cu),
+ processing_has_namespace_info);
- /* Reverse the list order to keep the debug info elements order. */
- while (--i >= 0)
- {
- struct typedef_field *dest, *src;
+ /* If we have address ranges, record them. */
+ dwarf2_record_block_ranges (die, block, baseaddr, cu);
- dest = &TYPE_TYPEDEF_FIELD (type, i);
- src = &fi.typedef_field_list->field;
- fi.typedef_field_list = fi.typedef_field_list->next;
- *dest = *src;
- }
- }
+ /* Attach template arguments to function. */
+ if (! VEC_empty (symbolp, template_args))
+ {
+ gdb_assert (templ_func != NULL);
+
+ templ_func->n_template_arguments = VEC_length (symbolp, template_args);
+ templ_func->template_arguments
+ = obstack_alloc (&objfile->objfile_obstack,
+ (templ_func->n_template_arguments
+ * sizeof (struct symbol *)));
+ memcpy (templ_func->template_arguments,
+ VEC_address (symbolp, template_args),
+ (templ_func->n_template_arguments * sizeof (struct symbol *)));
+ VEC_free (symbolp, template_args);
}
- quirk_gcc_member_function_pointer (type, cu->objfile);
+ /* In C++, we can have functions nested inside functions (e.g., when
+ a function declares a class that has methods). This means that
+ when we finish processing a function scope, we may need to go
+ back to building a containing block's symbol lists. */
+ local_symbols = new->locals;
+ param_symbols = new->params;
+ using_directives = new->using_directives;
- do_cleanups (back_to);
- return type;
+ /* If we've finished processing a top-level function, subsequent
+ symbols go in the file symbol list. */
+ if (outermost_context_p ())
+ cu->list_in_scope = &file_symbols;
}
+/* Process all the DIES contained within a lexical block scope. Start
+ a new scope, process the dies, and then close the scope. */
+
static void
-process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
+read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
{
- struct die_info *child_die = die->child;
- struct type *this_type;
+ struct objfile *objfile = cu->objfile;
+ struct context_stack *new;
+ CORE_ADDR lowpc, highpc;
+ struct die_info *child_die;
+ CORE_ADDR baseaddr;
- this_type = get_die_type (die, cu);
- if (this_type == NULL)
- this_type = read_structure_type (die, cu);
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
- /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
- snapshots) has been known to create a die giving a declaration
- for a class that has, as a child, a die giving a definition for a
- nested class. So we have to process our children even if the
- current die is a declaration. Normally, of course, a declaration
- won't have any children at all. */
+ /* Ignore blocks with missing or invalid low and high pc attributes. */
+ /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
+ as multiple lexical blocks? Handling children in a sane way would
+ be nasty. Might be easier to properly extend generic blocks to
+ describe ranges. */
+ if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
+ return;
+ lowpc += baseaddr;
+ highpc += baseaddr;
- while (child_die != NULL && child_die->tag)
+ push_context (0, lowpc);
+ if (die->child != NULL)
{
- if (child_die->tag == DW_TAG_member
- || child_die->tag == DW_TAG_variable
- || child_die->tag == DW_TAG_inheritance)
+ child_die = die->child;
+ while (child_die && child_die->tag)
{
- /* Do nothing. */
+ process_die (child_die, cu);
+ child_die = sibling_die (child_die);
}
- else
- process_die (child_die, cu);
-
- child_die = sibling_die (child_die);
}
+ new = pop_context ();
- /* Do not consider external references. According to the DWARF standard,
- these DIEs are identified by the fact that they have no byte_size
- attribute, and a declaration attribute. */
- if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
- || !die_is_declaration (die, cu))
- new_symbol (die, this_type, cu);
+ if (local_symbols != NULL || using_directives != NULL)
+ {
+ struct block *block
+ = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
+ highpc, objfile);
+
+ /* Note that recording ranges after traversing children, as we
+ do here, means that recording a parent's ranges entails
+ walking across all its children's ranges as they appear in
+ the address map, which is quadratic behavior.
+
+ It would be nicer to record the parent's ranges before
+ traversing its children, simply overriding whatever you find
+ there. But since we don't even decide whether to create a
+ block until after we've traversed its children, that's hard
+ to do. */
+ dwarf2_record_block_ranges (die, block, baseaddr, cu);
+ }
+ local_symbols = new->locals;
+ using_directives = new->using_directives;
}
-/* Given a DW_AT_enumeration_type die, set its type. We do not
- complete the type's fields yet, or create any symbols. */
+/* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
+ Return 1 if the attributes are present and valid, otherwise, return 0.
+ If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
-static struct type *
-read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
+static int
+dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
+ CORE_ADDR *high_return, struct dwarf2_cu *cu,
+ struct partial_symtab *ranges_pst)
{
struct objfile *objfile = cu->objfile;
- struct type *type;
- struct attribute *attr;
- const char *name;
+ struct comp_unit_head *cu_header = &cu->header;
+ bfd *obfd = objfile->obfd;
+ unsigned int addr_size = cu_header->addr_size;
+ CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
+ /* Base address selection entry. */
+ CORE_ADDR base;
+ int found_base;
+ unsigned int dummy;
+ gdb_byte *buffer;
+ CORE_ADDR marker;
+ int low_set;
+ CORE_ADDR low = 0;
+ CORE_ADDR high = 0;
+ CORE_ADDR baseaddr;
- /* If the definition of this type lives in .debug_types, read that type.
- Don't follow DW_AT_specification though, that will take us back up
- the chain and we want to go down. */
- attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
- if (attr)
+ found_base = cu->base_known;
+ base = cu->base_address;
+
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
+ if (offset >= dwarf2_per_objfile->ranges.size)
{
- struct dwarf2_cu *type_cu = cu;
- struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
+ complaint (&symfile_complaints,
+ _("Offset %d out of bounds for DW_AT_ranges attribute"),
+ offset);
+ return 0;
+ }
+ buffer = dwarf2_per_objfile->ranges.buffer + offset;
- type = read_type_die (type_die, type_cu);
- return set_die_type (die, type, cu);
+ /* Read in the largest possible address. */
+ marker = read_address (obfd, buffer, cu, &dummy);
+ if ((marker & mask) == mask)
+ {
+ /* If we found the largest possible address, then
+ read the base address. */
+ base = read_address (obfd, buffer + addr_size, cu, &dummy);
+ buffer += 2 * addr_size;
+ offset += 2 * addr_size;
+ found_base = 1;
}
- type = alloc_type (objfile);
+ low_set = 0;
- TYPE_CODE (type) = TYPE_CODE_ENUM;
- name = dwarf2_full_name (NULL, die, cu);
- if (name != NULL)
- TYPE_TAG_NAME (type) = (char *) name;
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
- attr = dwarf2_attr (die, DW_AT_byte_size, cu);
- if (attr)
+ while (1)
{
- TYPE_LENGTH (type) = DW_UNSND (attr);
- }
- else
- {
- TYPE_LENGTH (type) = 0;
- }
-
- /* The enumeration DIE can be incomplete. In Ada, any type can be
- declared as private in the package spec, and then defined only
- inside the package body. Such types are known as Taft Amendment
- Types. When another package uses such a type, an incomplete DIE
- may be generated by the compiler. */
- if (die_is_declaration (die, cu))
- TYPE_STUB (type) = 1;
+ CORE_ADDR range_beginning, range_end;
- return set_die_type (die, type, cu);
-}
+ range_beginning = read_address (obfd, buffer, cu, &dummy);
+ buffer += addr_size;
+ range_end = read_address (obfd, buffer, cu, &dummy);
+ buffer += addr_size;
+ offset += 2 * addr_size;
-/* Given a pointer to a die which begins an enumeration, process all
- the dies that define the members of the enumeration, and create the
- symbol for the enumeration type.
+ /* An end of list marker is a pair of zero addresses. */
+ if (range_beginning == 0 && range_end == 0)
+ /* Found the end of list entry. */
+ break;
- NOTE: We reverse the order of the element list. */
+ /* Each base address selection entry is a pair of 2 values.
+ The first is the largest possible address, the second is
+ the base address. Check for a base address here. */
+ if ((range_beginning & mask) == mask)
+ {
+ /* If we found the largest possible address, then
+ read the base address. */
+ base = read_address (obfd, buffer + addr_size, cu, &dummy);
+ found_base = 1;
+ continue;
+ }
-static void
-process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
-{
- struct die_info *child_die;
- struct field *fields;
- struct symbol *sym;
- int num_fields;
- int unsigned_enum = 1;
- char *name;
- struct type *this_type;
+ if (!found_base)
+ {
+ /* We have no valid base address for the ranges
+ data. */
+ complaint (&symfile_complaints,
+ _("Invalid .debug_ranges data (no base address)"));
+ return 0;
+ }
- num_fields = 0;
- fields = NULL;
- this_type = get_die_type (die, cu);
- if (this_type == NULL)
- this_type = read_enumeration_type (die, cu);
- if (die->child != NULL)
- {
- child_die = die->child;
- while (child_die && child_die->tag)
+ if (range_beginning > range_end)
{
- if (child_die->tag != DW_TAG_enumerator)
- {
- process_die (child_die, cu);
- }
- else
- {
- name = dwarf2_name (child_die, cu);
- if (name)
- {
- sym = new_symbol (child_die, this_type, cu);
- if (SYMBOL_VALUE (sym) < 0)
- unsigned_enum = 0;
+ /* Inverted range entries are invalid. */
+ complaint (&symfile_complaints,
+ _("Invalid .debug_ranges data (inverted range)"));
+ return 0;
+ }
- if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
- {
- fields = (struct field *)
- xrealloc (fields,
- (num_fields + DW_FIELD_ALLOC_CHUNK)
- * sizeof (struct field));
- }
+ /* Empty range entries have no effect. */
+ if (range_beginning == range_end)
+ continue;
- FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym);
- FIELD_TYPE (fields[num_fields]) = NULL;
- SET_FIELD_BITPOS (fields[num_fields], SYMBOL_VALUE (sym));
- FIELD_BITSIZE (fields[num_fields]) = 0;
+ range_beginning += base;
+ range_end += base;
- num_fields++;
- }
- }
+ if (ranges_pst != NULL)
+ addrmap_set_empty (objfile->psymtabs_addrmap,
+ range_beginning + baseaddr,
+ range_end - 1 + baseaddr,
+ ranges_pst);
- child_die = sibling_die (child_die);
+ /* FIXME: This is recording everything as a low-high
+ segment of consecutive addresses. We should have a
+ data structure for discontiguous block ranges
+ instead. */
+ if (! low_set)
+ {
+ low = range_beginning;
+ high = range_end;
+ low_set = 1;
}
-
- if (num_fields)
+ else
{
- TYPE_NFIELDS (this_type) = num_fields;
- TYPE_FIELDS (this_type) = (struct field *)
- TYPE_ALLOC (this_type, sizeof (struct field) * num_fields);
- memcpy (TYPE_FIELDS (this_type), fields,
- sizeof (struct field) * num_fields);
- xfree (fields);
+ if (range_beginning < low)
+ low = range_beginning;
+ if (range_end > high)
+ high = range_end;
}
- if (unsigned_enum)
- TYPE_UNSIGNED (this_type) = 1;
}
- new_symbol (die, this_type, cu);
-}
+ if (! low_set)
+ /* If the first entry is an end-of-list marker, the range
+ describes an empty scope, i.e. no instructions. */
+ return 0;
-/* Extract all information from a DW_TAG_array_type DIE and put it in
- the DIE's type field. For now, this only handles one dimensional
- arrays. */
+ if (low_return)
+ *low_return = low;
+ if (high_return)
+ *high_return = high;
+ return 1;
+}
-static struct type *
-read_array_type (struct die_info *die, struct dwarf2_cu *cu)
+/* Get low and high pc attributes from a die. Return 1 if the attributes
+ are present and valid, otherwise, return 0. Return -1 if the range is
+ discontinuous, i.e. derived from DW_AT_ranges information. */
+static int
+dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
+ CORE_ADDR *highpc, struct dwarf2_cu *cu,
+ struct partial_symtab *pst)
{
- struct objfile *objfile = cu->objfile;
- struct die_info *child_die;
- struct type *type;
- struct type *element_type, *range_type, *index_type;
- struct type **range_types = NULL;
struct attribute *attr;
- int ndim = 0;
- struct cleanup *back_to;
- char *name;
-
- element_type = die_type (die, cu);
-
- /* The die_type call above may have already set the type for this DIE. */
- type = get_die_type (die, cu);
- if (type)
- return type;
+ CORE_ADDR low = 0;
+ CORE_ADDR high = 0;
+ int ret = 0;
- /* Irix 6.2 native cc creates array types without children for
- arrays with unspecified length. */
- if (die->child == NULL)
+ attr = dwarf2_attr (die, DW_AT_high_pc, cu);
+ if (attr)
{
- index_type = objfile_type (objfile)->builtin_int;
- range_type = create_range_type (NULL, index_type, 0, -1);
- type = create_array_type (NULL, element_type, range_type);
- return set_die_type (die, type, cu);
- }
+ high = DW_ADDR (attr);
+ attr = dwarf2_attr (die, DW_AT_low_pc, cu);
+ if (attr)
+ low = DW_ADDR (attr);
+ else
+ /* Found high w/o low attribute. */
+ return 0;
- back_to = make_cleanup (null_cleanup, NULL);
- child_die = die->child;
- while (child_die && child_die->tag)
+ /* Found consecutive range of addresses. */
+ ret = 1;
+ }
+ else
{
- if (child_die->tag == DW_TAG_subrange_type)
+ attr = dwarf2_attr (die, DW_AT_ranges, cu);
+ if (attr != NULL)
{
- struct type *child_type = read_type_die (child_die, cu);
-
- if (child_type != NULL)
- {
- /* The range type was succesfully read. Save it for
- the array type creation. */
- if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
- {
- range_types = (struct type **)
- xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
- * sizeof (struct type *));
- if (ndim == 0)
- make_cleanup (free_current_contents, &range_types);
- }
- range_types[ndim++] = child_type;
- }
+ /* Value of the DW_AT_ranges attribute is the offset in the
+ .debug_ranges section. */
+ if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu, pst))
+ return 0;
+ /* Found discontinuous range of addresses. */
+ ret = -1;
}
- child_die = sibling_die (child_die);
}
- /* Dwarf2 dimensions are output from left to right, create the
- necessary array types in backwards order. */
+ /* read_partial_die has also the strict LOW < HIGH requirement. */
+ if (high <= low)
+ return 0;
- type = element_type;
+ /* When using the GNU linker, .gnu.linkonce. sections are used to
+ eliminate duplicate copies of functions and vtables and such.
+ The linker will arbitrarily choose one and discard the others.
+ The AT_*_pc values for such functions refer to local labels in
+ these sections. If the section from that file was discarded, the
+ labels are not in the output, so the relocs get a value of 0.
+ If this is a discarded function, mark the pc bounds as invalid,
+ so that GDB will ignore it. */
+ if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
+ return 0;
- if (read_array_order (die, cu) == DW_ORD_col_major)
- {
- int i = 0;
+ *lowpc = low;
+ *highpc = high;
+ return ret;
+}
- while (i < ndim)
- type = create_array_type (NULL, type, range_types[i++]);
- }
- else
+/* Assuming that DIE represents a subprogram DIE or a lexical block, get
+ its low and high PC addresses. Do nothing if these addresses could not
+ be determined. Otherwise, set LOWPC to the low address if it is smaller,
+ and HIGHPC to the high address if greater than HIGHPC. */
+
+static void
+dwarf2_get_subprogram_pc_bounds (struct die_info *die,
+ CORE_ADDR *lowpc, CORE_ADDR *highpc,
+ struct dwarf2_cu *cu)
+{
+ CORE_ADDR low, high;
+ struct die_info *child = die->child;
+
+ if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL))
{
- while (ndim-- > 0)
- type = create_array_type (NULL, type, range_types[ndim]);
+ *lowpc = min (*lowpc, low);
+ *highpc = max (*highpc, high);
}
- /* Understand Dwarf2 support for vector types (like they occur on
- the PowerPC w/ AltiVec). Gcc just adds another attribute to the
- array type. This is not part of the Dwarf2/3 standard yet, but a
- custom vendor extension. The main difference between a regular
- array and the vector variant is that vectors are passed by value
- to functions. */
- attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
- if (attr)
- make_vector_type (type);
-
- name = dwarf2_name (die, cu);
- if (name)
- TYPE_NAME (type) = name;
-
- /* Install the type in the die. */
- set_die_type (die, type, cu);
-
- /* set_die_type should be already done. */
- set_descriptive_type (type, die, cu);
-
- do_cleanups (back_to);
+ /* If the language does not allow nested subprograms (either inside
+ subprograms or lexical blocks), we're done. */
+ if (cu->language != language_ada)
+ return;
- return type;
+ /* Check all the children of the given DIE. If it contains nested
+ subprograms, then check their pc bounds. Likewise, we need to
+ check lexical blocks as well, as they may also contain subprogram
+ definitions. */
+ while (child && child->tag)
+ {
+ if (child->tag == DW_TAG_subprogram
+ || child->tag == DW_TAG_lexical_block)
+ dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu);
+ child = sibling_die (child);
+ }
}
-static enum dwarf_array_dim_ordering
-read_array_order (struct die_info *die, struct dwarf2_cu *cu)
-{
- struct attribute *attr;
+/* Get the low and high pc's represented by the scope DIE, and store
+ them in *LOWPC and *HIGHPC. If the correct values can't be
+ determined, set *LOWPC to -1 and *HIGHPC to 0. */
- attr = dwarf2_attr (die, DW_AT_ordering, cu);
+static void
+get_scope_pc_bounds (struct die_info *die,
+ CORE_ADDR *lowpc, CORE_ADDR *highpc,
+ struct dwarf2_cu *cu)
+{
+ CORE_ADDR best_low = (CORE_ADDR) -1;
+ CORE_ADDR best_high = (CORE_ADDR) 0;
+ CORE_ADDR current_low, current_high;
- if (attr) return DW_SND (attr);
+ if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL))
+ {
+ best_low = current_low;
+ best_high = current_high;
+ }
+ else
+ {
+ struct die_info *child = die->child;
- /*
- GNU F77 is a special case, as at 08/2004 array type info is the
- opposite order to the dwarf2 specification, but data is still
- laid out as per normal fortran.
+ while (child && child->tag)
+ {
+ switch (child->tag) {
+ case DW_TAG_subprogram:
+ dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu);
+ break;
+ case DW_TAG_namespace:
+ case DW_TAG_module:
+ /* FIXME: carlton/2004-01-16: Should we do this for
+ DW_TAG_class_type/DW_TAG_structure_type, too? I think
+ that current GCC's always emit the DIEs corresponding
+ to definitions of methods of classes as children of a
+ DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
+ the DIEs giving the declarations, which could be
+ anywhere). But I don't see any reason why the
+ standards says that they have to be there. */
+ get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
- FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
- version checking.
- */
+ if (current_low != ((CORE_ADDR) -1))
+ {
+ best_low = min (best_low, current_low);
+ best_high = max (best_high, current_high);
+ }
+ break;
+ default:
+ /* Ignore. */
+ break;
+ }
- if (cu->language == language_fortran
- && cu->producer && strstr (cu->producer, "GNU F77"))
- {
- return DW_ORD_row_major;
+ child = sibling_die (child);
+ }
}
- switch (cu->language_defn->la_array_ordering)
- {
- case array_column_major:
- return DW_ORD_col_major;
- case array_row_major:
- default:
- return DW_ORD_row_major;
- };
+ *lowpc = best_low;
+ *highpc = best_high;
}
-/* Extract all information from a DW_TAG_set_type DIE and put it in
- the DIE's type field. */
-
-static struct type *
-read_set_type (struct die_info *die, struct dwarf2_cu *cu)
+/* Record the address ranges for BLOCK, offset by BASEADDR, as given
+ in DIE. */
+static void
+dwarf2_record_block_ranges (struct die_info *die, struct block *block,
+ CORE_ADDR baseaddr, struct dwarf2_cu *cu)
{
- struct type *domain_type, *set_type;
struct attribute *attr;
- domain_type = die_type (die, cu);
+ attr = dwarf2_attr (die, DW_AT_high_pc, cu);
+ if (attr)
+ {
+ CORE_ADDR high = DW_ADDR (attr);
- /* The die_type call above may have already set the type for this DIE. */
- set_type = get_die_type (die, cu);
- if (set_type)
- return set_type;
+ attr = dwarf2_attr (die, DW_AT_low_pc, cu);
+ if (attr)
+ {
+ CORE_ADDR low = DW_ADDR (attr);
- set_type = create_set_type (NULL, domain_type);
+ record_block_range (block, baseaddr + low, baseaddr + high - 1);
+ }
+ }
- attr = dwarf2_attr (die, DW_AT_byte_size, cu);
+ attr = dwarf2_attr (die, DW_AT_ranges, cu);
if (attr)
- TYPE_LENGTH (set_type) = DW_UNSND (attr);
+ {
+ bfd *obfd = cu->objfile->obfd;
- return set_die_type (die, set_type, cu);
-}
+ /* The value of the DW_AT_ranges attribute is the offset of the
+ address range list in the .debug_ranges section. */
+ unsigned long offset = DW_UNSND (attr);
+ gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset;
-/* First cut: install each common block member as a global variable. */
+ /* For some target architectures, but not others, the
+ read_address function sign-extends the addresses it returns.
+ To recognize base address selection entries, we need a
+ mask. */
+ unsigned int addr_size = cu->header.addr_size;
+ CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
-static void
-read_common_block (struct die_info *die, struct dwarf2_cu *cu)
-{
- struct die_info *child_die;
- struct attribute *attr;
- struct symbol *sym;
- CORE_ADDR base = (CORE_ADDR) 0;
+ /* The base address, to which the next pair is relative. Note
+ that this 'base' is a DWARF concept: most entries in a range
+ list are relative, to reduce the number of relocs against the
+ debugging information. This is separate from this function's
+ 'baseaddr' argument, which GDB uses to relocate debugging
+ information from a shared library based on the address at
+ which the library was loaded. */
+ CORE_ADDR base = cu->base_address;
+ int base_known = cu->base_known;
- attr = dwarf2_attr (die, DW_AT_location, cu);
- if (attr)
- {
- /* Support the .debug_loc offsets */
- if (attr_form_is_block (attr))
- {
- base = decode_locdesc (DW_BLOCK (attr), cu);
- }
- else if (attr_form_is_section_offset (attr))
+ gdb_assert (dwarf2_per_objfile->ranges.readin);
+ if (offset >= dwarf2_per_objfile->ranges.size)
{
- dwarf2_complex_location_expr_complaint ();
+ complaint (&symfile_complaints,
+ _("Offset %lu out of bounds for DW_AT_ranges attribute"),
+ offset);
+ return;
}
- else
+
+ for (;;)
{
- dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
- "common block member");
- }
- }
- if (die->child != NULL)
- {
- child_die = die->child;
- while (child_die && child_die->tag)
- {
- sym = new_symbol (child_die, NULL, cu);
- attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu);
- if (attr)
- {
- CORE_ADDR byte_offset = 0;
+ unsigned int bytes_read;
+ CORE_ADDR start, end;
- if (attr_form_is_section_offset (attr))
- dwarf2_complex_location_expr_complaint ();
- else if (attr_form_is_constant (attr))
- byte_offset = dwarf2_get_attr_constant_value (attr, 0);
- else if (attr_form_is_block (attr))
- byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
- else
- dwarf2_complex_location_expr_complaint ();
+ start = read_address (obfd, buffer, cu, &bytes_read);
+ buffer += bytes_read;
+ end = read_address (obfd, buffer, cu, &bytes_read);
+ buffer += bytes_read;
- SYMBOL_VALUE_ADDRESS (sym) = base + byte_offset;
- add_symbol_to_list (sym, &global_symbols);
- }
- child_die = sibling_die (child_die);
- }
+ /* Did we find the end of the range list? */
+ if (start == 0 && end == 0)
+ break;
+
+ /* Did we find a base address selection entry? */
+ else if ((start & base_select_mask) == base_select_mask)
+ {
+ base = end;
+ base_known = 1;
+ }
+
+ /* We found an ordinary address range. */
+ else
+ {
+ if (!base_known)
+ {
+ complaint (&symfile_complaints,
+ _("Invalid .debug_ranges data "
+ "(no base address)"));
+ return;
+ }
+
+ if (start > end)
+ {
+ /* Inverted range entries are invalid. */
+ complaint (&symfile_complaints,
+ _("Invalid .debug_ranges data "
+ "(inverted range)"));
+ return;
+ }
+
+ /* Empty range entries have no effect. */
+ if (start == end)
+ continue;
+
+ record_block_range (block,
+ baseaddr + base + start,
+ baseaddr + base + end - 1);
+ }
+ }
}
}
-/* Create a type for a C++ namespace. */
+/* Add an aggregate field to the field list. */
-static struct type *
-read_namespace_type (struct die_info *die, struct dwarf2_cu *cu)
+static void
+dwarf2_add_field (struct field_info *fip, struct die_info *die,
+ struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
- const char *previous_prefix, *name;
- int is_anonymous;
- struct type *type;
+ struct gdbarch *gdbarch = get_objfile_arch (objfile);
+ struct nextfield *new_field;
+ struct attribute *attr;
+ struct field *fp;
+ char *fieldname = "";
- /* For extensions, reuse the type of the original namespace. */
- if (dwarf2_attr (die, DW_AT_extension, cu) != NULL)
- {
- struct die_info *ext_die;
- struct dwarf2_cu *ext_cu = cu;
+ /* Allocate a new field list entry and link it in. */
+ new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
+ make_cleanup (xfree, new_field);
+ memset (new_field, 0, sizeof (struct nextfield));
- ext_die = dwarf2_extension (die, &ext_cu);
- type = read_type_die (ext_die, ext_cu);
- return set_die_type (die, type, cu);
+ if (die->tag == DW_TAG_inheritance)
+ {
+ new_field->next = fip->baseclasses;
+ fip->baseclasses = new_field;
}
+ else
+ {
+ new_field->next = fip->fields;
+ fip->fields = new_field;
+ }
+ fip->nfields++;
- name = namespace_name (die, &is_anonymous, cu);
-
- /* Now build the name of the current namespace. */
+ /* Handle accessibility and virtuality of field.
+ The default accessibility for members is public, the default
+ accessibility for inheritance is private. */
+ if (die->tag != DW_TAG_inheritance)
+ new_field->accessibility = DW_ACCESS_public;
+ else
+ new_field->accessibility = DW_ACCESS_private;
+ new_field->virtuality = DW_VIRTUALITY_none;
- previous_prefix = determine_prefix (die, cu);
- if (previous_prefix[0] != '\0')
- name = typename_concat (&objfile->objfile_obstack,
- previous_prefix, name, 0, cu);
+ attr = dwarf2_attr (die, DW_AT_accessibility, cu);
+ if (attr)
+ new_field->accessibility = DW_UNSND (attr);
+ if (new_field->accessibility != DW_ACCESS_public)
+ fip->non_public_fields = 1;
+ attr = dwarf2_attr (die, DW_AT_virtuality, cu);
+ if (attr)
+ new_field->virtuality = DW_UNSND (attr);
- /* Create the type. */
- type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL,
- objfile);
- TYPE_NAME (type) = (char *) name;
- TYPE_TAG_NAME (type) = TYPE_NAME (type);
+ fp = &new_field->field;
- return set_die_type (die, type, cu);
-}
+ if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
+ {
+ /* Data member other than a C++ static data member. */
-/* Read a C++ namespace. */
+ /* Get type of field. */
+ fp->type = die_type (die, cu);
-static void
-read_namespace (struct die_info *die, struct dwarf2_cu *cu)
-{
- struct objfile *objfile = cu->objfile;
- const char *name;
- int is_anonymous;
+ SET_FIELD_BITPOS (*fp, 0);
- /* Add a symbol associated to this if we haven't seen the namespace
- before. Also, add a using directive if it's an anonymous
- namespace. */
+ /* Get bit size of field (zero if none). */
+ attr = dwarf2_attr (die, DW_AT_bit_size, cu);
+ if (attr)
+ {
+ FIELD_BITSIZE (*fp) = DW_UNSND (attr);
+ }
+ else
+ {
+ FIELD_BITSIZE (*fp) = 0;
+ }
- if (dwarf2_attr (die, DW_AT_extension, cu) == NULL)
- {
- struct type *type;
+ /* Get bit offset of field. */
+ attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
+ if (attr)
+ {
+ int byte_offset = 0;
- type = read_type_die (die, cu);
- new_symbol (die, type, cu);
+ if (attr_form_is_section_offset (attr))
+ dwarf2_complex_location_expr_complaint ();
+ else if (attr_form_is_constant (attr))
+ byte_offset = dwarf2_get_attr_constant_value (attr, 0);
+ else if (attr_form_is_block (attr))
+ byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
+ else
+ dwarf2_complex_location_expr_complaint ();
- name = namespace_name (die, &is_anonymous, cu);
- if (is_anonymous)
+ SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
+ }
+ attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
+ if (attr)
{
- const char *previous_prefix = determine_prefix (die, cu);
+ if (gdbarch_bits_big_endian (gdbarch))
+ {
+ /* For big endian bits, the DW_AT_bit_offset gives the
+ additional bit offset from the MSB of the containing
+ anonymous object to the MSB of the field. We don't
+ have to do anything special since we don't need to
+ know the size of the anonymous object. */
+ FIELD_BITPOS (*fp) += DW_UNSND (attr);
+ }
+ else
+ {
+ /* For little endian bits, compute the bit offset to the
+ MSB of the anonymous object, subtract off the number of
+ bits from the MSB of the field to the MSB of the
+ object, and then subtract off the number of bits of
+ the field itself. The result is the bit offset of
+ the LSB of the field. */
+ int anonymous_size;
+ int bit_offset = DW_UNSND (attr);
- cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL,
- NULL, &objfile->objfile_obstack);
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
+ if (attr)
+ {
+ /* The size of the anonymous object containing
+ the bit field is explicit, so use the
+ indicated size (in bytes). */
+ anonymous_size = DW_UNSND (attr);
+ }
+ else
+ {
+ /* The size of the anonymous object containing
+ the bit field must be inferred from the type
+ attribute of the data member containing the
+ bit field. */
+ anonymous_size = TYPE_LENGTH (fp->type);
+ }
+ FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
+ - bit_offset - FIELD_BITSIZE (*fp);
+ }
}
- }
- if (die->child != NULL)
- {
- struct die_info *child_die = die->child;
+ /* Get name of field. */
+ fieldname = dwarf2_name (die, cu);
+ if (fieldname == NULL)
+ fieldname = "";
- while (child_die && child_die->tag)
+ /* The name is already allocated along with this objfile, so we don't
+ need to duplicate it for the type. */
+ fp->name = fieldname;
+
+ /* Change accessibility for artificial fields (e.g. virtual table
+ pointer or virtual base class pointer) to private. */
+ if (dwarf2_attr (die, DW_AT_artificial, cu))
{
- process_die (child_die, cu);
- child_die = sibling_die (child_die);
+ FIELD_ARTIFICIAL (*fp) = 1;
+ new_field->accessibility = DW_ACCESS_private;
+ fip->non_public_fields = 1;
}
}
-}
+ else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
+ {
+ /* C++ static member. */
-/* Read a Fortran module as type. This DIE can be only a declaration used for
- imported module. Still we need that type as local Fortran "use ... only"
- declaration imports depend on the created type in determine_prefix. */
+ /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
+ is a declaration, but all versions of G++ as of this writing
+ (so through at least 3.2.1) incorrectly generate
+ DW_TAG_variable tags. */
-static struct type *
-read_module_type (struct die_info *die, struct dwarf2_cu *cu)
-{
- struct objfile *objfile = cu->objfile;
- char *module_name;
- struct type *type;
+ char *physname;
- module_name = dwarf2_name (die, cu);
- if (!module_name)
- complaint (&symfile_complaints, _("DW_TAG_module has no name, offset 0x%x"),
- die->offset);
- type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile);
+ /* Get name of field. */
+ fieldname = dwarf2_name (die, cu);
+ if (fieldname == NULL)
+ return;
- /* determine_prefix uses TYPE_TAG_NAME. */
- TYPE_TAG_NAME (type) = TYPE_NAME (type);
+ attr = dwarf2_attr (die, DW_AT_const_value, cu);
+ if (attr
+ /* Only create a symbol if this is an external value.
+ new_symbol checks this and puts the value in the global symbol
+ table, which we want. If it is not external, new_symbol
+ will try to put the value in cu->list_in_scope which is wrong. */
+ && dwarf2_flag_true_p (die, DW_AT_external, cu))
+ {
+ /* A static const member, not much different than an enum as far as
+ we're concerned, except that we can support more types. */
+ new_symbol (die, NULL, cu);
+ }
- return set_die_type (die, type, cu);
-}
+ /* Get physical name. */
+ physname = (char *) dwarf2_physname (fieldname, die, cu);
-/* Read a Fortran module. */
+ /* The name is already allocated along with this objfile, so we don't
+ need to duplicate it for the type. */
+ SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
+ FIELD_TYPE (*fp) = die_type (die, cu);
+ FIELD_NAME (*fp) = fieldname;
+ }
+ else if (die->tag == DW_TAG_inheritance)
+ {
+ /* C++ base class field. */
+ attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
+ if (attr)
+ {
+ int byte_offset = 0;
-static void
-read_module (struct die_info *die, struct dwarf2_cu *cu)
-{
- struct die_info *child_die = die->child;
+ if (attr_form_is_section_offset (attr))
+ dwarf2_complex_location_expr_complaint ();
+ else if (attr_form_is_constant (attr))
+ byte_offset = dwarf2_get_attr_constant_value (attr, 0);
+ else if (attr_form_is_block (attr))
+ byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
+ else
+ dwarf2_complex_location_expr_complaint ();
- while (child_die && child_die->tag)
- {
- process_die (child_die, cu);
- child_die = sibling_die (child_die);
+ SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
+ }
+ FIELD_BITSIZE (*fp) = 0;
+ FIELD_TYPE (*fp) = die_type (die, cu);
+ FIELD_NAME (*fp) = type_name_no_tag (fp->type);
+ fip->nbaseclasses++;
}
}
-/* Return the name of the namespace represented by DIE. Set
- *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
- namespace. */
+/* Add a typedef defined in the scope of the FIP's class. */
-static const char *
-namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
+static void
+dwarf2_add_typedef (struct field_info *fip, struct die_info *die,
+ struct dwarf2_cu *cu)
{
- struct die_info *current_die;
- const char *name = NULL;
-
- /* Loop through the extensions until we find a name. */
+ struct objfile *objfile = cu->objfile;
+ struct typedef_field_list *new_field;
+ struct attribute *attr;
+ struct typedef_field *fp;
+ char *fieldname = "";
- for (current_die = die;
- current_die != NULL;
- current_die = dwarf2_extension (die, &cu))
- {
- name = dwarf2_name (current_die, cu);
- if (name != NULL)
- break;
- }
+ /* Allocate a new field list entry and link it in. */
+ new_field = xzalloc (sizeof (*new_field));
+ make_cleanup (xfree, new_field);
- /* Is it an anonymous namespace? */
+ gdb_assert (die->tag == DW_TAG_typedef);
- *is_anonymous = (name == NULL);
- if (*is_anonymous)
- name = "(anonymous namespace)";
+ fp = &new_field->field;
- return name;
+ /* Get name of field. */
+ fp->name = dwarf2_name (die, cu);
+ if (fp->name == NULL)
+ return;
+
+ fp->type = read_type_die (die, cu);
+
+ new_field->next = fip->typedef_field_list;
+ fip->typedef_field_list = new_field;
+ fip->typedef_field_list_count++;
}
-/* Extract all information from a DW_TAG_pointer_type DIE and add to
- the user defined type vector. */
+/* Create the vector of fields, and attach it to the type. */
-static struct type *
-read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
+static void
+dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
+ struct dwarf2_cu *cu)
{
- struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
- struct comp_unit_head *cu_header = &cu->header;
- struct type *type;
- struct attribute *attr_byte_size;
- struct attribute *attr_address_class;
- int byte_size, addr_class;
- struct type *target_type;
+ int nfields = fip->nfields;
- target_type = die_type (die, cu);
+ /* Record the field count, allocate space for the array of fields,
+ and create blank accessibility bitfields if necessary. */
+ TYPE_NFIELDS (type) = nfields;
+ TYPE_FIELDS (type) = (struct field *)
+ TYPE_ALLOC (type, sizeof (struct field) * nfields);
+ memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
- /* The die_type call above may have already set the type for this DIE. */
- type = get_die_type (die, cu);
- if (type)
- return type;
+ if (fip->non_public_fields && cu->language != language_ada)
+ {
+ ALLOCATE_CPLUS_STRUCT_TYPE (type);
- type = lookup_pointer_type (target_type);
+ TYPE_FIELD_PRIVATE_BITS (type) =
+ (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
+ B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
- attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
- if (attr_byte_size)
- byte_size = DW_UNSND (attr_byte_size);
- else
- byte_size = cu_header->addr_size;
+ TYPE_FIELD_PROTECTED_BITS (type) =
+ (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
+ B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
- attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
- if (attr_address_class)
- addr_class = DW_UNSND (attr_address_class);
- else
- addr_class = DW_ADDR_none;
+ TYPE_FIELD_IGNORE_BITS (type) =
+ (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
+ B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
+ }
- /* If the pointer size or address class is different than the
- default, create a type variant marked as such and set the
- length accordingly. */
- if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
+ /* If the type has baseclasses, allocate and clear a bit vector for
+ TYPE_FIELD_VIRTUAL_BITS. */
+ if (fip->nbaseclasses && cu->language != language_ada)
{
- if (gdbarch_address_class_type_flags_p (gdbarch))
- {
- int type_flags;
+ int num_bytes = B_BYTES (fip->nbaseclasses);
+ unsigned char *pointer;
- type_flags = gdbarch_address_class_type_flags
- (gdbarch, byte_size, addr_class);
- gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
- == 0);
- type = make_type_with_address_space (type, type_flags);
- }
- else if (TYPE_LENGTH (type) != byte_size)
+ ALLOCATE_CPLUS_STRUCT_TYPE (type);
+ pointer = TYPE_ALLOC (type, num_bytes);
+ TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
+ B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
+ TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
+ }
+
+ /* Copy the saved-up fields into the field vector. Start from the head of
+ the list, adding to the tail of the field array, so that they end up in
+ the same order in the array in which they were added to the list. */
+ while (nfields-- > 0)
+ {
+ struct nextfield *fieldp;
+
+ if (fip->fields)
{
- complaint (&symfile_complaints, _("invalid pointer size %d"), byte_size);
+ fieldp = fip->fields;
+ fip->fields = fieldp->next;
}
else
{
- /* Should we also complain about unhandled address classes? */
+ fieldp = fip->baseclasses;
+ fip->baseclasses = fieldp->next;
}
- }
-
- TYPE_LENGTH (type) = byte_size;
- return set_die_type (die, type, cu);
-}
-
-/* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
- the user defined type vector. */
-
-static struct type *
-read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
-{
- struct type *type;
- struct type *to_type;
- struct type *domain;
- to_type = die_type (die, cu);
- domain = die_containing_type (die, cu);
+ TYPE_FIELD (type, nfields) = fieldp->field;
+ switch (fieldp->accessibility)
+ {
+ case DW_ACCESS_private:
+ if (cu->language != language_ada)
+ SET_TYPE_FIELD_PRIVATE (type, nfields);
+ break;
- /* The calls above may have already set the type for this DIE. */
- type = get_die_type (die, cu);
- if (type)
- return type;
+ case DW_ACCESS_protected:
+ if (cu->language != language_ada)
+ SET_TYPE_FIELD_PROTECTED (type, nfields);
+ break;
- if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
- type = lookup_methodptr_type (to_type);
- else
- type = lookup_memberptr_type (to_type, domain);
+ case DW_ACCESS_public:
+ break;
- return set_die_type (die, type, cu);
+ default:
+ /* Unknown accessibility. Complain and treat it as public. */
+ {
+ complaint (&symfile_complaints, _("unsupported accessibility %d"),
+ fieldp->accessibility);
+ }
+ break;
+ }
+ if (nfields < fip->nbaseclasses)
+ {
+ switch (fieldp->virtuality)
+ {
+ case DW_VIRTUALITY_virtual:
+ case DW_VIRTUALITY_pure_virtual:
+ if (cu->language == language_ada)
+ error (_("unexpected virtuality in component of Ada type"));
+ SET_TYPE_FIELD_VIRTUAL (type, nfields);
+ break;
+ }
+ }
+ }
}
-/* Extract all information from a DW_TAG_reference_type DIE and add to
- the user defined type vector. */
+/* Add a member function to the proper fieldlist. */
-static struct type *
-read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
+static void
+dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
+ struct type *type, struct dwarf2_cu *cu)
{
- struct comp_unit_head *cu_header = &cu->header;
- struct type *type, *target_type;
+ struct objfile *objfile = cu->objfile;
struct attribute *attr;
+ struct fnfieldlist *flp;
+ int i;
+ struct fn_field *fnp;
+ char *fieldname;
+ struct nextfnfield *new_fnfield;
+ struct type *this_type;
- target_type = die_type (die, cu);
+ if (cu->language == language_ada)
+ error (_("unexpected member function in Ada type"));
- /* The die_type call above may have already set the type for this DIE. */
- type = get_die_type (die, cu);
- if (type)
- return type;
+ /* Get name of member function. */
+ fieldname = dwarf2_name (die, cu);
+ if (fieldname == NULL)
+ return;
- type = lookup_reference_type (target_type);
- attr = dwarf2_attr (die, DW_AT_byte_size, cu);
- if (attr)
+ /* Look up member function name in fieldlist. */
+ for (i = 0; i < fip->nfnfields; i++)
{
- TYPE_LENGTH (type) = DW_UNSND (attr);
+ if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
+ break;
}
+
+ /* Create new list element if necessary. */
+ if (i < fip->nfnfields)
+ flp = &fip->fnfieldlists[i];
else
{
- TYPE_LENGTH (type) = cu_header->addr_size;
+ if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
+ {
+ fip->fnfieldlists = (struct fnfieldlist *)
+ xrealloc (fip->fnfieldlists,
+ (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
+ * sizeof (struct fnfieldlist));
+ if (fip->nfnfields == 0)
+ make_cleanup (free_current_contents, &fip->fnfieldlists);
+ }
+ flp = &fip->fnfieldlists[fip->nfnfields];
+ flp->name = fieldname;
+ flp->length = 0;
+ flp->head = NULL;
+ i = fip->nfnfields++;
}
- return set_die_type (die, type, cu);
-}
-
-static struct type *
-read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
-{
- struct type *base_type, *cv_type;
- base_type = die_type (die, cu);
+ /* Create a new member function field and chain it to the field list
+ entry. */
+ new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
+ make_cleanup (xfree, new_fnfield);
+ memset (new_fnfield, 0, sizeof (struct nextfnfield));
+ new_fnfield->next = flp->head;
+ flp->head = new_fnfield;
+ flp->length++;
- /* The die_type call above may have already set the type for this DIE. */
- cv_type = get_die_type (die, cu);
- if (cv_type)
- return cv_type;
+ /* Fill in the member function field info. */
+ fnp = &new_fnfield->fnfield;
- cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
- return set_die_type (die, cv_type, cu);
-}
-
-static struct type *
-read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
-{
- struct type *base_type, *cv_type;
+ /* Delay processing of the physname until later. */
+ if (cu->language == language_cplus || cu->language == language_java)
+ {
+ add_to_method_list (type, i, flp->length - 1, fieldname,
+ die, cu);
+ }
+ else
+ {
+ char *physname = (char *) dwarf2_physname (fieldname, die, cu);
+ fnp->physname = physname ? physname : "";
+ }
- base_type = die_type (die, cu);
+ fnp->type = alloc_type (objfile);
+ this_type = read_type_die (die, cu);
+ if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC)
+ {
+ int nparams = TYPE_NFIELDS (this_type);
- /* The die_type call above may have already set the type for this DIE. */
- cv_type = get_die_type (die, cu);
- if (cv_type)
- return cv_type;
+ /* TYPE is the domain of this method, and THIS_TYPE is the type
+ of the method itself (TYPE_CODE_METHOD). */
+ smash_to_method_type (fnp->type, type,
+ TYPE_TARGET_TYPE (this_type),
+ TYPE_FIELDS (this_type),
+ TYPE_NFIELDS (this_type),
+ TYPE_VARARGS (this_type));
- cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
- return set_die_type (die, cv_type, cu);
-}
+ /* Handle static member functions.
+ Dwarf2 has no clean way to discern C++ static and non-static
+ member functions. G++ helps GDB by marking the first
+ parameter for non-static member functions (which is the this
+ pointer) as artificial. We obtain this information from
+ read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
+ if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0)
+ fnp->voffset = VOFFSET_STATIC;
+ }
+ else
+ complaint (&symfile_complaints, _("member function type missing for '%s'"),
+ dwarf2_full_name (fieldname, die, cu));
-/* Extract all information from a DW_TAG_string_type DIE and add to
- the user defined type vector. It isn't really a user defined type,
- but it behaves like one, with other DIE's using an AT_user_def_type
- attribute to reference it. */
+ /* Get fcontext from DW_AT_containing_type if present. */
+ if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
+ fnp->fcontext = die_containing_type (die, cu);
-static struct type *
-read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
-{
- struct objfile *objfile = cu->objfile;
- struct gdbarch *gdbarch = get_objfile_arch (objfile);
- struct type *type, *range_type, *index_type, *char_type;
- struct attribute *attr;
- unsigned int length;
+ /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
+ is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
- attr = dwarf2_attr (die, DW_AT_string_length, cu);
+ /* Get accessibility. */
+ attr = dwarf2_attr (die, DW_AT_accessibility, cu);
if (attr)
{
- length = DW_UNSND (attr);
+ switch (DW_UNSND (attr))
+ {
+ case DW_ACCESS_private:
+ fnp->is_private = 1;
+ break;
+ case DW_ACCESS_protected:
+ fnp->is_protected = 1;
+ break;
+ }
}
- else
+
+ /* Check for artificial methods. */
+ attr = dwarf2_attr (die, DW_AT_artificial, cu);
+ if (attr && DW_UNSND (attr) != 0)
+ fnp->is_artificial = 1;
+
+ /* Get index in virtual function table if it is a virtual member
+ function. For older versions of GCC, this is an offset in the
+ appropriate virtual table, as specified by DW_AT_containing_type.
+ For everyone else, it is an expression to be evaluated relative
+ to the object address. */
+
+ attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
+ if (attr)
{
- /* check for the DW_AT_byte_size attribute */
- attr = dwarf2_attr (die, DW_AT_byte_size, cu);
- if (attr)
+ if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0)
{
- length = DW_UNSND (attr);
+ if (DW_BLOCK (attr)->data[0] == DW_OP_constu)
+ {
+ /* Old-style GCC. */
+ fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
+ }
+ else if (DW_BLOCK (attr)->data[0] == DW_OP_deref
+ || (DW_BLOCK (attr)->size > 1
+ && DW_BLOCK (attr)->data[0] == DW_OP_deref_size
+ && DW_BLOCK (attr)->data[1] == cu->header.addr_size))
+ {
+ struct dwarf_block blk;
+ int offset;
+
+ offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref
+ ? 1 : 2);
+ blk.size = DW_BLOCK (attr)->size - offset;
+ blk.data = DW_BLOCK (attr)->data + offset;
+ fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu);
+ if ((fnp->voffset % cu->header.addr_size) != 0)
+ dwarf2_complex_location_expr_complaint ();
+ else
+ fnp->voffset /= cu->header.addr_size;
+ fnp->voffset += 2;
+ }
+ else
+ dwarf2_complex_location_expr_complaint ();
+
+ if (!fnp->fcontext)
+ fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0));
+ }
+ else if (attr_form_is_section_offset (attr))
+ {
+ dwarf2_complex_location_expr_complaint ();
}
else
{
- length = 1;
+ dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
+ fieldname);
}
}
-
- index_type = objfile_type (objfile)->builtin_int;
- range_type = create_range_type (NULL, index_type, 1, length);
- char_type = language_string_char_type (cu->language_defn, gdbarch);
- type = create_string_type (NULL, char_type, range_type);
-
- return set_die_type (die, type, cu);
+ else
+ {
+ attr = dwarf2_attr (die, DW_AT_virtuality, cu);
+ if (attr && DW_UNSND (attr))
+ {
+ /* GCC does this, as of 2008-08-25; PR debug/37237. */
+ complaint (&symfile_complaints,
+ _("Member function \"%s\" (offset %d) is virtual "
+ "but the vtable offset is not specified"),
+ fieldname, die->offset);
+ ALLOCATE_CPLUS_STRUCT_TYPE (type);
+ TYPE_CPLUS_DYNAMIC (type) = 1;
+ }
+ }
}
-/* Handle DIES due to C code like:
+/* Create the vector of member function fields, and attach it to the type. */
- struct foo
- {
- int (*funcp)(int a, long l);
- int b;
- };
+static void
+dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
+ struct dwarf2_cu *cu)
+{
+ struct fnfieldlist *flp;
+ int total_length = 0;
+ int i;
- ('funcp' generates a DW_TAG_subroutine_type DIE)
- */
+ if (cu->language == language_ada)
+ error (_("unexpected member functions in Ada type"));
-static struct type *
-read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
-{
- struct type *type; /* Type that this function returns */
- struct type *ftype; /* Function that returns above type */
- struct attribute *attr;
+ ALLOCATE_CPLUS_STRUCT_TYPE (type);
+ TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
+ TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
- type = die_type (die, cu);
+ for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
+ {
+ struct nextfnfield *nfp = flp->head;
+ struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
+ int k;
- /* The die_type call above may have already set the type for this DIE. */
- ftype = get_die_type (die, cu);
- if (ftype)
- return ftype;
+ TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
+ TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
+ fn_flp->fn_fields = (struct fn_field *)
+ TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
+ for (k = flp->length; (k--, nfp); nfp = nfp->next)
+ fn_flp->fn_fields[k] = nfp->fnfield;
- ftype = lookup_function_type (type);
+ total_length += flp->length;
+ }
- /* All functions in C++, Pascal and Java have prototypes. */
- attr = dwarf2_attr (die, DW_AT_prototyped, cu);
- if ((attr && (DW_UNSND (attr) != 0))
- || cu->language == language_cplus
- || cu->language == language_java
- || cu->language == language_pascal)
- TYPE_PROTOTYPED (ftype) = 1;
- else if (producer_is_realview (cu->producer))
- /* RealView does not emit DW_AT_prototyped. We can not
- distinguish prototyped and unprototyped functions; default to
- prototyped, since that is more common in modern code (and
- RealView warns about unprototyped functions). */
- TYPE_PROTOTYPED (ftype) = 1;
+ TYPE_NFN_FIELDS (type) = fip->nfnfields;
+ TYPE_NFN_FIELDS_TOTAL (type) = total_length;
+}
- /* Store the calling convention in the type if it's available in
- the subroutine die. Otherwise set the calling convention to
- the default value DW_CC_normal. */
- attr = dwarf2_attr (die, DW_AT_calling_convention, cu);
- TYPE_CALLING_CONVENTION (ftype) = attr ? DW_UNSND (attr) : DW_CC_normal;
+/* Returns non-zero if NAME is the name of a vtable member in CU's
+ language, zero otherwise. */
+static int
+is_vtable_name (const char *name, struct dwarf2_cu *cu)
+{
+ static const char vptr[] = "_vptr";
+ static const char vtable[] = "vtable";
- /* We need to add the subroutine type to the die immediately so
- we don't infinitely recurse when dealing with parameters
- declared as the same subroutine type. */
- set_die_type (die, ftype, cu);
+ /* Look for the C++ and Java forms of the vtable. */
+ if ((cu->language == language_java
+ && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
+ || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
+ && is_cplus_marker (name[sizeof (vptr) - 1])))
+ return 1;
- if (die->child != NULL)
- {
- struct type *void_type = objfile_type (cu->objfile)->builtin_void;
- struct die_info *child_die;
- int nparams, iparams;
+ return 0;
+}
- /* Count the number of parameters.
- FIXME: GDB currently ignores vararg functions, but knows about
- vararg member functions. */
- nparams = 0;
- child_die = die->child;
- while (child_die && child_die->tag)
- {
- if (child_die->tag == DW_TAG_formal_parameter)
- nparams++;
- else if (child_die->tag == DW_TAG_unspecified_parameters)
- TYPE_VARARGS (ftype) = 1;
- child_die = sibling_die (child_die);
- }
+/* GCC outputs unnamed structures that are really pointers to member
+ functions, with the ABI-specified layout. If TYPE describes
+ such a structure, smash it into a member function type.
- /* Allocate storage for parameters and fill them in. */
- TYPE_NFIELDS (ftype) = nparams;
- TYPE_FIELDS (ftype) = (struct field *)
- TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
+ GCC shouldn't do this; it should just output pointer to member DIEs.
+ This is GCC PR debug/28767. */
- /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
- even if we error out during the parameters reading below. */
- for (iparams = 0; iparams < nparams; iparams++)
- TYPE_FIELD_TYPE (ftype, iparams) = void_type;
+static void
+quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile)
+{
+ struct type *pfn_type, *domain_type, *new_type;
- iparams = 0;
- child_die = die->child;
- while (child_die && child_die->tag)
- {
- if (child_die->tag == DW_TAG_formal_parameter)
- {
- /* Dwarf2 has no clean way to discern C++ static and non-static
- member functions. G++ helps GDB by marking the first
- parameter for non-static member functions (which is the
- this pointer) as artificial. We pass this information
- to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
- attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
- if (attr)
- TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
- else
- {
- TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
+ /* Check for a structure with no name and two children. */
+ if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2)
+ return;
- /* GCC/43521: In java, the formal parameter
- "this" is sometimes not marked with DW_AT_artificial. */
- if (cu->language == language_java)
- {
- const char *name = dwarf2_name (child_die, cu);
+ /* Check for __pfn and __delta members. */
+ if (TYPE_FIELD_NAME (type, 0) == NULL
+ || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0
+ || TYPE_FIELD_NAME (type, 1) == NULL
+ || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0)
+ return;
- if (name && !strcmp (name, "this"))
- TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1;
- }
- }
- TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, cu);
- iparams++;
- }
- child_die = sibling_die (child_die);
- }
- }
+ /* Find the type of the method. */
+ pfn_type = TYPE_FIELD_TYPE (type, 0);
+ if (pfn_type == NULL
+ || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
+ || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
+ return;
- return ftype;
+ /* Look for the "this" argument. */
+ pfn_type = TYPE_TARGET_TYPE (pfn_type);
+ if (TYPE_NFIELDS (pfn_type) == 0
+ /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
+ || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
+ return;
+
+ domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
+ new_type = alloc_type (objfile);
+ smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type),
+ TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
+ TYPE_VARARGS (pfn_type));
+ smash_to_methodptr_type (type, new_type);
}
-static struct type *
-read_typedef (struct die_info *die, struct dwarf2_cu *cu)
-{
- struct objfile *objfile = cu->objfile;
- const char *name = NULL;
- struct type *this_type;
+/* Called when we find the DIE that starts a structure or union scope
+ (definition) to create a type for the structure or union. Fill in
+ the type's name and general properties; the members will not be
+ processed until process_structure_type.
- name = dwarf2_full_name (NULL, die, cu);
- this_type = init_type (TYPE_CODE_TYPEDEF, 0,
- TYPE_FLAG_TARGET_STUB, NULL, objfile);
- TYPE_NAME (this_type) = (char *) name;
- set_die_type (die, this_type, cu);
- TYPE_TARGET_TYPE (this_type) = die_type (die, cu);
- return this_type;
-}
+ NOTE: we need to call these functions regardless of whether or not the
+ DIE has a DW_AT_name attribute, since it might be an anonymous
+ structure or union. This gets the type entered into our set of
+ user defined types.
-/* Find a representation of a given base type and install
- it in the TYPE field of the die. */
+ However, if the structure is incomplete (an opaque struct/union)
+ then suppress creating a symbol table entry for it since gdb only
+ wants to find the one with the complete definition. Note that if
+ it is complete, we just call new_symbol, which does it's own
+ checking about whether the struct/union is anonymous or not (and
+ suppresses creating a symbol table entry itself). */
static struct type *
-read_base_type (struct die_info *die, struct dwarf2_cu *cu)
+read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
struct type *type;
struct attribute *attr;
- int encoding = 0, size = 0;
char *name;
- enum type_code code = TYPE_CODE_INT;
- int type_flags = 0;
- struct type *target_type = NULL;
- attr = dwarf2_attr (die, DW_AT_encoding, cu);
- if (attr)
- {
- encoding = DW_UNSND (attr);
- }
- attr = dwarf2_attr (die, DW_AT_byte_size, cu);
+ /* If the definition of this type lives in .debug_types, read that type.
+ Don't follow DW_AT_specification though, that will take us back up
+ the chain and we want to go down. */
+ attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
if (attr)
{
- size = DW_UNSND (attr);
+ struct dwarf2_cu *type_cu = cu;
+ struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
+
+ /* We could just recurse on read_structure_type, but we need to call
+ get_die_type to ensure only one type for this DIE is created.
+ This is important, for example, because for c++ classes we need
+ TYPE_NAME set which is only done by new_symbol. Blech. */
+ type = read_type_die (type_die, type_cu);
+
+ /* TYPE_CU may not be the same as CU.
+ Ensure TYPE is recorded in CU's type_hash table. */
+ return set_die_type (die, type, cu);
}
+
+ type = alloc_type (objfile);
+ INIT_CPLUS_SPECIFIC (type);
+
name = dwarf2_name (die, cu);
- if (!name)
+ if (name != NULL)
{
- complaint (&symfile_complaints,
- _("DW_AT_name missing from DW_TAG_base_type"));
+ if (cu->language == language_cplus
+ || cu->language == language_java)
+ {
+ char *full_name = (char *) dwarf2_full_name (name, die, cu);
+
+ /* dwarf2_full_name might have already finished building the DIE's
+ type. If so, there is no need to continue. */
+ if (get_die_type (die, cu) != NULL)
+ return get_die_type (die, cu);
+
+ TYPE_TAG_NAME (type) = full_name;
+ if (die->tag == DW_TAG_structure_type
+ || die->tag == DW_TAG_class_type)
+ TYPE_NAME (type) = TYPE_TAG_NAME (type);
+ }
+ else
+ {
+ /* The name is already allocated along with this objfile, so
+ we don't need to duplicate it for the type. */
+ TYPE_TAG_NAME (type) = (char *) name;
+ if (die->tag == DW_TAG_class_type)
+ TYPE_NAME (type) = TYPE_TAG_NAME (type);
+ }
}
- switch (encoding)
+ if (die->tag == DW_TAG_structure_type)
{
- case DW_ATE_address:
- /* Turn DW_ATE_address into a void * pointer. */
- code = TYPE_CODE_PTR;
- type_flags |= TYPE_FLAG_UNSIGNED;
- target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
- break;
- case DW_ATE_boolean:
- code = TYPE_CODE_BOOL;
- type_flags |= TYPE_FLAG_UNSIGNED;
- break;
- case DW_ATE_complex_float:
- code = TYPE_CODE_COMPLEX;
- target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
- break;
- case DW_ATE_decimal_float:
- code = TYPE_CODE_DECFLOAT;
- break;
- case DW_ATE_float:
- code = TYPE_CODE_FLT;
- break;
- case DW_ATE_signed:
- break;
- case DW_ATE_unsigned:
- type_flags |= TYPE_FLAG_UNSIGNED;
- break;
- case DW_ATE_signed_char:
- if (cu->language == language_ada || cu->language == language_m2
- || cu->language == language_pascal)
- code = TYPE_CODE_CHAR;
- break;
- case DW_ATE_unsigned_char:
- if (cu->language == language_ada || cu->language == language_m2
- || cu->language == language_pascal)
- code = TYPE_CODE_CHAR;
- type_flags |= TYPE_FLAG_UNSIGNED;
- break;
- case DW_ATE_UTF:
- /* We just treat this as an integer and then recognize the
- type by name elsewhere. */
- break;
+ TYPE_CODE (type) = TYPE_CODE_STRUCT;
+ }
+ else if (die->tag == DW_TAG_union_type)
+ {
+ TYPE_CODE (type) = TYPE_CODE_UNION;
+ }
+ else
+ {
+ TYPE_CODE (type) = TYPE_CODE_CLASS;
+ }
- default:
- complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
- dwarf_type_encoding_name (encoding));
- break;
+ if (cu->language == language_cplus && die->tag == DW_TAG_class_type)
+ TYPE_DECLARED_CLASS (type) = 1;
+
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
+ if (attr)
+ {
+ TYPE_LENGTH (type) = DW_UNSND (attr);
+ }
+ else
+ {
+ TYPE_LENGTH (type) = 0;
}
- type = init_type (code, size, type_flags, NULL, objfile);
- TYPE_NAME (type) = name;
- TYPE_TARGET_TYPE (type) = target_type;
+ TYPE_STUB_SUPPORTED (type) = 1;
+ if (die_is_declaration (die, cu))
+ TYPE_STUB (type) = 1;
+ else if (attr == NULL && die->child == NULL
+ && producer_is_realview (cu->producer))
+ /* RealView does not output the required DW_AT_declaration
+ on incomplete types. */
+ TYPE_STUB (type) = 1;
- if (name && strcmp (name, "char") == 0)
- TYPE_NOSIGN (type) = 1;
+ /* We need to add the type field to the die immediately so we don't
+ infinitely recurse when dealing with pointers to the structure
+ type within the structure itself. */
+ set_die_type (die, type, cu);
- return set_die_type (die, type, cu);
+ /* set_die_type should be already done. */
+ set_descriptive_type (type, die, cu);
+
+ return type;
}
-/* Read the given DW_AT_subrange DIE. */
+/* Finish creating a structure or union type, including filling in
+ its members and creating a symbol for it. */
-static struct type *
-read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
+static void
+process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
{
- struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
- struct type *base_type;
- struct type *range_type;
- struct attribute *attr;
- LONGEST low = 0;
- LONGEST high = -1;
- char *name;
- LONGEST negative_mask;
-
- base_type = die_type (die, cu);
+ struct objfile *objfile = cu->objfile;
+ struct die_info *child_die = die->child;
+ struct type *type;
- /* The die_type call above may have already set the type for this DIE. */
- range_type = get_die_type (die, cu);
- if (range_type)
- return range_type;
+ type = get_die_type (die, cu);
+ if (type == NULL)
+ type = read_structure_type (die, cu);
- if (cu->language == language_fortran)
+ if (die->child != NULL && ! die_is_declaration (die, cu))
{
- /* FORTRAN implies a lower bound of 1, if not given. */
- low = 1;
- }
+ struct field_info fi;
+ struct die_info *child_die;
+ VEC (symbolp) *template_args = NULL;
+ struct cleanup *back_to = make_cleanup (null_cleanup, 0);
- /* FIXME: For variable sized arrays either of these could be
- a variable rather than a constant value. We'll allow it,
- but we don't know how to handle it. */
- attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
- if (attr)
- low = dwarf2_get_attr_constant_value (attr, 0);
+ memset (&fi, 0, sizeof (struct field_info));
- attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
- if (attr)
- {
- if (attr->form == DW_FORM_block1 || is_ref_attr (attr))
- {
- /* GCC encodes arrays with unspecified or dynamic length
- with a DW_FORM_block1 attribute or a reference attribute.
- FIXME: GDB does not yet know how to handle dynamic
- arrays properly, treat them as arrays with unspecified
- length for now.
+ child_die = die->child;
- FIXME: jimb/2003-09-22: GDB does not really know
- how to handle arrays of unspecified length
- either; we just represent them as zero-length
- arrays. Choose an appropriate upper bound given
- the lower bound we've computed above. */
- high = low - 1;
- }
- else
- high = dwarf2_get_attr_constant_value (attr, 1);
- }
- else
- {
- attr = dwarf2_attr (die, DW_AT_count, cu);
- if (attr)
+ while (child_die && child_die->tag)
{
- int count = dwarf2_get_attr_constant_value (attr, 1);
- high = low + count - 1;
- }
- }
+ if (child_die->tag == DW_TAG_member
+ || child_die->tag == DW_TAG_variable)
+ {
+ /* NOTE: carlton/2002-11-05: A C++ static data member
+ should be a DW_TAG_member that is a declaration, but
+ all versions of G++ as of this writing (so through at
+ least 3.2.1) incorrectly generate DW_TAG_variable
+ tags for them instead. */
+ dwarf2_add_field (&fi, child_die, cu);
+ }
+ else if (child_die->tag == DW_TAG_subprogram)
+ {
+ /* C++ member function. */
+ dwarf2_add_member_fn (&fi, child_die, type, cu);
+ }
+ else if (child_die->tag == DW_TAG_inheritance)
+ {
+ /* C++ base class field. */
+ dwarf2_add_field (&fi, child_die, cu);
+ }
+ else if (child_die->tag == DW_TAG_typedef)
+ dwarf2_add_typedef (&fi, child_die, cu);
+ else if (child_die->tag == DW_TAG_template_type_param
+ || child_die->tag == DW_TAG_template_value_param)
+ {
+ struct symbol *arg = new_symbol (child_die, NULL, cu);
- /* Dwarf-2 specifications explicitly allows to create subrange types
- without specifying a base type.
- In that case, the base type must be set to the type of
- the lower bound, upper bound or count, in that order, if any of these
- three attributes references an object that has a type.
- If no base type is found, the Dwarf-2 specifications say that
- a signed integer type of size equal to the size of an address should
- be used.
- For the following C code: `extern char gdb_int [];'
- GCC produces an empty range DIE.
- FIXME: muller/2010-05-28: Possible references to object for low bound,
- high bound or count are not yet handled by this code.
- */
- if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
- {
- struct objfile *objfile = cu->objfile;
- struct gdbarch *gdbarch = get_objfile_arch (objfile);
- int addr_size = gdbarch_addr_bit (gdbarch) /8;
- struct type *int_type = objfile_type (objfile)->builtin_int;
+ if (arg != NULL)
+ VEC_safe_push (symbolp, template_args, arg);
+ }
- /* Test "int", "long int", and "long long int" objfile types,
- and select the first one having a size above or equal to the
- architecture address size. */
- if (int_type && TYPE_LENGTH (int_type) >= addr_size)
- base_type = int_type;
- else
+ child_die = sibling_die (child_die);
+ }
+
+ /* Attach template arguments to type. */
+ if (! VEC_empty (symbolp, template_args))
{
- int_type = objfile_type (objfile)->builtin_long;
- if (int_type && TYPE_LENGTH (int_type) >= addr_size)
- base_type = int_type;
- else
- {
- int_type = objfile_type (objfile)->builtin_long_long;
- if (int_type && TYPE_LENGTH (int_type) >= addr_size)
- base_type = int_type;
- }
+ ALLOCATE_CPLUS_STRUCT_TYPE (type);
+ TYPE_N_TEMPLATE_ARGUMENTS (type)
+ = VEC_length (symbolp, template_args);
+ TYPE_TEMPLATE_ARGUMENTS (type)
+ = obstack_alloc (&objfile->objfile_obstack,
+ (TYPE_N_TEMPLATE_ARGUMENTS (type)
+ * sizeof (struct symbol *)));
+ memcpy (TYPE_TEMPLATE_ARGUMENTS (type),
+ VEC_address (symbolp, template_args),
+ (TYPE_N_TEMPLATE_ARGUMENTS (type)
+ * sizeof (struct symbol *)));
+ VEC_free (symbolp, template_args);
}
- }
- negative_mask =
- (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1);
- if (!TYPE_UNSIGNED (base_type) && (low & negative_mask))
- low |= negative_mask;
- if (!TYPE_UNSIGNED (base_type) && (high & negative_mask))
- high |= negative_mask;
+ /* Attach fields and member functions to the type. */
+ if (fi.nfields)
+ dwarf2_attach_fields_to_type (&fi, type, cu);
+ if (fi.nfnfields)
+ {
+ dwarf2_attach_fn_fields_to_type (&fi, type, cu);
- range_type = create_range_type (NULL, base_type, low, high);
+ /* Get the type which refers to the base class (possibly this
+ class itself) which contains the vtable pointer for the current
+ class from the DW_AT_containing_type attribute. This use of
+ DW_AT_containing_type is a GNU extension. */
- /* Mark arrays with dynamic length at least as an array of unspecified
- length. GDB could check the boundary but before it gets implemented at
- least allow accessing the array elements. */
- if (attr && attr->form == DW_FORM_block1)
- TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1;
+ if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
+ {
+ struct type *t = die_containing_type (die, cu);
- name = dwarf2_name (die, cu);
- if (name)
- TYPE_NAME (range_type) = name;
+ TYPE_VPTR_BASETYPE (type) = t;
+ if (type == t)
+ {
+ int i;
- attr = dwarf2_attr (die, DW_AT_byte_size, cu);
- if (attr)
- TYPE_LENGTH (range_type) = DW_UNSND (attr);
+ /* Our own class provides vtbl ptr. */
+ for (i = TYPE_NFIELDS (t) - 1;
+ i >= TYPE_N_BASECLASSES (t);
+ --i)
+ {
+ char *fieldname = TYPE_FIELD_NAME (t, i);
- set_die_type (die, range_type, cu);
+ if (is_vtable_name (fieldname, cu))
+ {
+ TYPE_VPTR_FIELDNO (type) = i;
+ break;
+ }
+ }
- /* set_die_type should be already done. */
- set_descriptive_type (range_type, die, cu);
+ /* Complain if virtual function table field not found. */
+ if (i < TYPE_N_BASECLASSES (t))
+ complaint (&symfile_complaints,
+ _("virtual function table pointer "
+ "not found when defining class '%s'"),
+ TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
+ "");
+ }
+ else
+ {
+ TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
+ }
+ }
+ else if (cu->producer
+ && strncmp (cu->producer,
+ "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
+ {
+ /* The IBM XLC compiler does not provide direct indication
+ of the containing type, but the vtable pointer is
+ always named __vfp. */
- return range_type;
-}
+ int i;
-static struct type *
-read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
-{
- struct type *type;
+ for (i = TYPE_NFIELDS (type) - 1;
+ i >= TYPE_N_BASECLASSES (type);
+ --i)
+ {
+ if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
+ {
+ TYPE_VPTR_FIELDNO (type) = i;
+ TYPE_VPTR_BASETYPE (type) = type;
+ break;
+ }
+ }
+ }
+ }
- /* For now, we only support the C meaning of an unspecified type: void. */
+ /* Copy fi.typedef_field_list linked list elements content into the
+ allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
+ if (fi.typedef_field_list)
+ {
+ int i = fi.typedef_field_list_count;
- type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile);
- TYPE_NAME (type) = dwarf2_name (die, cu);
+ ALLOCATE_CPLUS_STRUCT_TYPE (type);
+ TYPE_TYPEDEF_FIELD_ARRAY (type)
+ = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i);
+ TYPE_TYPEDEF_FIELD_COUNT (type) = i;
- return set_die_type (die, type, cu);
-}
+ /* Reverse the list order to keep the debug info elements order. */
+ while (--i >= 0)
+ {
+ struct typedef_field *dest, *src;
-/* Trivial hash function for die_info: the hash value of a DIE
- is its offset in .debug_info for this objfile. */
+ dest = &TYPE_TYPEDEF_FIELD (type, i);
+ src = &fi.typedef_field_list->field;
+ fi.typedef_field_list = fi.typedef_field_list->next;
+ *dest = *src;
+ }
+ }
-static hashval_t
-die_hash (const void *item)
-{
- const struct die_info *die = item;
+ do_cleanups (back_to);
+ }
- return die->offset;
-}
+ quirk_gcc_member_function_pointer (type, cu->objfile);
-/* Trivial comparison function for die_info structures: two DIEs
- are equal if they have the same offset. */
+ /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
+ snapshots) has been known to create a die giving a declaration
+ for a class that has, as a child, a die giving a definition for a
+ nested class. So we have to process our children even if the
+ current die is a declaration. Normally, of course, a declaration
+ won't have any children at all. */
-static int
-die_eq (const void *item_lhs, const void *item_rhs)
-{
- const struct die_info *die_lhs = item_lhs;
- const struct die_info *die_rhs = item_rhs;
+ while (child_die != NULL && child_die->tag)
+ {
+ if (child_die->tag == DW_TAG_member
+ || child_die->tag == DW_TAG_variable
+ || child_die->tag == DW_TAG_inheritance
+ || child_die->tag == DW_TAG_template_value_param
+ || child_die->tag == DW_TAG_template_type_param)
+ {
+ /* Do nothing. */
+ }
+ else
+ process_die (child_die, cu);
- return die_lhs->offset == die_rhs->offset;
+ child_die = sibling_die (child_die);
+ }
+
+ /* Do not consider external references. According to the DWARF standard,
+ these DIEs are identified by the fact that they have no byte_size
+ attribute, and a declaration attribute. */
+ if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
+ || !die_is_declaration (die, cu))
+ new_symbol (die, type, cu);
}
-/* Read a whole compilation unit into a linked list of dies. */
+/* Given a DW_AT_enumeration_type die, set its type. We do not
+ complete the type's fields yet, or create any symbols. */
-static struct die_info *
-read_comp_unit (gdb_byte *info_ptr, struct dwarf2_cu *cu)
+static struct type *
+read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
{
- struct die_reader_specs reader_specs;
+ struct objfile *objfile = cu->objfile;
+ struct type *type;
+ struct attribute *attr;
+ const char *name;
- gdb_assert (cu->die_hash == NULL);
- cu->die_hash
- = htab_create_alloc_ex (cu->header.length / 12,
- die_hash,
- die_eq,
- NULL,
- &cu->comp_unit_obstack,
- hashtab_obstack_allocate,
- dummy_obstack_deallocate);
-
- init_cu_die_reader (&reader_specs, cu);
-
- return read_die_and_children (&reader_specs, info_ptr, &info_ptr, NULL);
-}
-
-/* Main entry point for reading a DIE and all children.
- Read the DIE and dump it if requested. */
+ /* If the definition of this type lives in .debug_types, read that type.
+ Don't follow DW_AT_specification though, that will take us back up
+ the chain and we want to go down. */
+ attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
+ if (attr)
+ {
+ struct dwarf2_cu *type_cu = cu;
+ struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
-static struct die_info *
-read_die_and_children (const struct die_reader_specs *reader,
- gdb_byte *info_ptr,
- gdb_byte **new_info_ptr,
- struct die_info *parent)
-{
- struct die_info *result = read_die_and_children_1 (reader, info_ptr,
- new_info_ptr, parent);
+ type = read_type_die (type_die, type_cu);
- if (dwarf2_die_debug)
- {
- fprintf_unfiltered (gdb_stdlog,
- "\nRead die from %s of %s:\n",
- reader->buffer == dwarf2_per_objfile->info.buffer
- ? ".debug_info"
- : reader->buffer == dwarf2_per_objfile->types.buffer
- ? ".debug_types"
- : "unknown section",
- reader->abfd->filename);
- dump_die (result, dwarf2_die_debug);
+ /* TYPE_CU may not be the same as CU.
+ Ensure TYPE is recorded in CU's type_hash table. */
+ return set_die_type (die, type, cu);
}
- return result;
-}
-
-/* Read a single die and all its descendents. Set the die's sibling
- field to NULL; set other fields in the die correctly, and set all
- of the descendents' fields correctly. Set *NEW_INFO_PTR to the
- location of the info_ptr after reading all of those dies. PARENT
- is the parent of the die in question. */
+ type = alloc_type (objfile);
-static struct die_info *
-read_die_and_children_1 (const struct die_reader_specs *reader,
- gdb_byte *info_ptr,
- gdb_byte **new_info_ptr,
- struct die_info *parent)
-{
- struct die_info *die;
- gdb_byte *cur_ptr;
- int has_children;
+ TYPE_CODE (type) = TYPE_CODE_ENUM;
+ name = dwarf2_full_name (NULL, die, cu);
+ if (name != NULL)
+ TYPE_TAG_NAME (type) = (char *) name;
- cur_ptr = read_full_die (reader, &die, info_ptr, &has_children);
- if (die == NULL)
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
+ if (attr)
{
- *new_info_ptr = cur_ptr;
- return NULL;
+ TYPE_LENGTH (type) = DW_UNSND (attr);
}
- store_in_ref_table (die, reader->cu);
-
- if (has_children)
- die->child = read_die_and_siblings (reader, cur_ptr, new_info_ptr, die);
else
{
- die->child = NULL;
- *new_info_ptr = cur_ptr;
+ TYPE_LENGTH (type) = 0;
}
- die->sibling = NULL;
- die->parent = parent;
- return die;
+ /* The enumeration DIE can be incomplete. In Ada, any type can be
+ declared as private in the package spec, and then defined only
+ inside the package body. Such types are known as Taft Amendment
+ Types. When another package uses such a type, an incomplete DIE
+ may be generated by the compiler. */
+ if (die_is_declaration (die, cu))
+ TYPE_STUB (type) = 1;
+
+ return set_die_type (die, type, cu);
}
-/* Read a die, all of its descendents, and all of its siblings; set
- all of the fields of all of the dies correctly. Arguments are as
- in read_die_and_children. */
+/* Given a pointer to a die which begins an enumeration, process all
+ the dies that define the members of the enumeration, and create the
+ symbol for the enumeration type.
-static struct die_info *
-read_die_and_siblings (const struct die_reader_specs *reader,
- gdb_byte *info_ptr,
- gdb_byte **new_info_ptr,
- struct die_info *parent)
+ NOTE: We reverse the order of the element list. */
+
+static void
+process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
{
- struct die_info *first_die, *last_sibling;
- gdb_byte *cur_ptr;
+ struct type *this_type;
- cur_ptr = info_ptr;
- first_die = last_sibling = NULL;
+ this_type = get_die_type (die, cu);
+ if (this_type == NULL)
+ this_type = read_enumeration_type (die, cu);
- while (1)
+ if (die->child != NULL)
{
- struct die_info *die
- = read_die_and_children_1 (reader, cur_ptr, &cur_ptr, parent);
+ struct die_info *child_die;
+ struct symbol *sym;
+ struct field *fields = NULL;
+ int num_fields = 0;
+ int unsigned_enum = 1;
+ char *name;
- if (die == NULL)
+ child_die = die->child;
+ while (child_die && child_die->tag)
{
- *new_info_ptr = cur_ptr;
- return first_die;
- }
+ if (child_die->tag != DW_TAG_enumerator)
+ {
+ process_die (child_die, cu);
+ }
+ else
+ {
+ name = dwarf2_name (child_die, cu);
+ if (name)
+ {
+ sym = new_symbol (child_die, this_type, cu);
+ if (SYMBOL_VALUE (sym) < 0)
+ unsigned_enum = 0;
- if (!first_die)
- first_die = die;
- else
- last_sibling->sibling = die;
+ if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
+ {
+ fields = (struct field *)
+ xrealloc (fields,
+ (num_fields + DW_FIELD_ALLOC_CHUNK)
+ * sizeof (struct field));
+ }
- last_sibling = die;
- }
-}
+ FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym);
+ FIELD_TYPE (fields[num_fields]) = NULL;
+ SET_FIELD_BITPOS (fields[num_fields], SYMBOL_VALUE (sym));
+ FIELD_BITSIZE (fields[num_fields]) = 0;
-/* Read the die from the .debug_info section buffer. Set DIEP to
- point to a newly allocated die with its information, except for its
- child, sibling, and parent fields. Set HAS_CHILDREN to tell
- whether the die has children or not. */
+ num_fields++;
+ }
+ }
-static gdb_byte *
-read_full_die (const struct die_reader_specs *reader,
- struct die_info **diep, gdb_byte *info_ptr,
- int *has_children)
-{
- unsigned int abbrev_number, bytes_read, i, offset;
- struct abbrev_info *abbrev;
- struct die_info *die;
- struct dwarf2_cu *cu = reader->cu;
- bfd *abfd = reader->abfd;
+ child_die = sibling_die (child_die);
+ }
- offset = info_ptr - reader->buffer;
- abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
- info_ptr += bytes_read;
- if (!abbrev_number)
- {
- *diep = NULL;
- *has_children = 0;
- return info_ptr;
+ if (num_fields)
+ {
+ TYPE_NFIELDS (this_type) = num_fields;
+ TYPE_FIELDS (this_type) = (struct field *)
+ TYPE_ALLOC (this_type, sizeof (struct field) * num_fields);
+ memcpy (TYPE_FIELDS (this_type), fields,
+ sizeof (struct field) * num_fields);
+ xfree (fields);
+ }
+ if (unsigned_enum)
+ TYPE_UNSIGNED (this_type) = 1;
}
- abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
- if (!abbrev)
- error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
- abbrev_number,
- bfd_get_filename (abfd));
-
- die = dwarf_alloc_die (cu, abbrev->num_attrs);
- die->offset = offset;
- die->tag = abbrev->tag;
- die->abbrev = abbrev_number;
-
- die->num_attrs = abbrev->num_attrs;
-
- for (i = 0; i < abbrev->num_attrs; ++i)
- info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
- abfd, info_ptr, cu);
-
- *diep = die;
- *has_children = abbrev->has_children;
- return info_ptr;
+ new_symbol (die, this_type, cu);
}
-/* In DWARF version 2, the description of the debugging information is
- stored in a separate .debug_abbrev section. Before we read any
- dies from a section we read in all abbreviations and install them
- in a hash table. This function also sets flags in CU describing
- the data found in the abbrev table. */
+/* Extract all information from a DW_TAG_array_type DIE and put it in
+ the DIE's type field. For now, this only handles one dimensional
+ arrays. */
-static void
-dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu)
+static struct type *
+read_array_type (struct die_info *die, struct dwarf2_cu *cu)
{
- struct comp_unit_head *cu_header = &cu->header;
- gdb_byte *abbrev_ptr;
- struct abbrev_info *cur_abbrev;
- unsigned int abbrev_number, bytes_read, abbrev_name;
- unsigned int abbrev_form, hash_number;
- struct attr_abbrev *cur_attrs;
- unsigned int allocated_attrs;
-
- /* Initialize dwarf2 abbrevs */
- obstack_init (&cu->abbrev_obstack);
- cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack,
- (ABBREV_HASH_SIZE
- * sizeof (struct abbrev_info *)));
- memset (cu->dwarf2_abbrevs, 0,
- ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
+ struct objfile *objfile = cu->objfile;
+ struct die_info *child_die;
+ struct type *type;
+ struct type *element_type, *range_type, *index_type;
+ struct type **range_types = NULL;
+ struct attribute *attr;
+ int ndim = 0;
+ struct cleanup *back_to;
+ char *name;
- dwarf2_read_section (dwarf2_per_objfile->objfile,
- &dwarf2_per_objfile->abbrev);
- abbrev_ptr = dwarf2_per_objfile->abbrev.buffer + cu_header->abbrev_offset;
- abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
- abbrev_ptr += bytes_read;
+ element_type = die_type (die, cu);
- allocated_attrs = ATTR_ALLOC_CHUNK;
- cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
+ /* The die_type call above may have already set the type for this DIE. */
+ type = get_die_type (die, cu);
+ if (type)
+ return type;
- /* loop until we reach an abbrev number of 0 */
- while (abbrev_number)
+ /* Irix 6.2 native cc creates array types without children for
+ arrays with unspecified length. */
+ if (die->child == NULL)
{
- cur_abbrev = dwarf_alloc_abbrev (cu);
-
- /* read in abbrev header */
- cur_abbrev->number = abbrev_number;
- cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
- abbrev_ptr += bytes_read;
- cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
- abbrev_ptr += 1;
-
- if (cur_abbrev->tag == DW_TAG_namespace)
- cu->has_namespace_info = 1;
+ index_type = objfile_type (objfile)->builtin_int;
+ range_type = create_range_type (NULL, index_type, 0, -1);
+ type = create_array_type (NULL, element_type, range_type);
+ return set_die_type (die, type, cu);
+ }
- /* now read in declarations */
- abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
- abbrev_ptr += bytes_read;
- abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
- abbrev_ptr += bytes_read;
- while (abbrev_name)
+ back_to = make_cleanup (null_cleanup, NULL);
+ child_die = die->child;
+ while (child_die && child_die->tag)
+ {
+ if (child_die->tag == DW_TAG_subrange_type)
{
- if (cur_abbrev->num_attrs == allocated_attrs)
- {
- allocated_attrs += ATTR_ALLOC_CHUNK;
- cur_attrs
- = xrealloc (cur_attrs, (allocated_attrs
- * sizeof (struct attr_abbrev)));
- }
+ struct type *child_type = read_type_die (child_die, cu);
- /* Record whether this compilation unit might have
- inter-compilation-unit references. If we don't know what form
- this attribute will have, then it might potentially be a
- DW_FORM_ref_addr, so we conservatively expect inter-CU
- references. */
+ if (child_type != NULL)
+ {
+ /* The range type was succesfully read. Save it for the
+ array type creation. */
+ if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
+ {
+ range_types = (struct type **)
+ xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
+ * sizeof (struct type *));
+ if (ndim == 0)
+ make_cleanup (free_current_contents, &range_types);
+ }
+ range_types[ndim++] = child_type;
+ }
+ }
+ child_die = sibling_die (child_die);
+ }
- if (abbrev_form == DW_FORM_ref_addr
- || abbrev_form == DW_FORM_indirect)
- cu->has_form_ref_addr = 1;
+ /* Dwarf2 dimensions are output from left to right, create the
+ necessary array types in backwards order. */
- cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
- cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
- abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
- abbrev_ptr += bytes_read;
- abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
- abbrev_ptr += bytes_read;
- }
+ type = element_type;
- cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack,
- (cur_abbrev->num_attrs
- * sizeof (struct attr_abbrev)));
- memcpy (cur_abbrev->attrs, cur_attrs,
- cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
+ if (read_array_order (die, cu) == DW_ORD_col_major)
+ {
+ int i = 0;
- hash_number = abbrev_number % ABBREV_HASH_SIZE;
- cur_abbrev->next = cu->dwarf2_abbrevs[hash_number];
- cu->dwarf2_abbrevs[hash_number] = cur_abbrev;
+ while (i < ndim)
+ type = create_array_type (NULL, type, range_types[i++]);
+ }
+ else
+ {
+ while (ndim-- > 0)
+ type = create_array_type (NULL, type, range_types[ndim]);
+ }
- /* Get next abbreviation.
- Under Irix6 the abbreviations for a compilation unit are not
- always properly terminated with an abbrev number of 0.
- Exit loop if we encounter an abbreviation which we have
- already read (which means we are about to read the abbreviations
- for the next compile unit) or if the end of the abbreviation
- table is reached. */
- if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev.buffer)
- >= dwarf2_per_objfile->abbrev.size)
- break;
- abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
- abbrev_ptr += bytes_read;
- if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL)
- break;
+ /* Understand Dwarf2 support for vector types (like they occur on
+ the PowerPC w/ AltiVec). Gcc just adds another attribute to the
+ array type. This is not part of the Dwarf2/3 standard yet, but a
+ custom vendor extension. The main difference between a regular
+ array and the vector variant is that vectors are passed by value
+ to functions. */
+ attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
+ if (attr)
+ make_vector_type (type);
+
+ /* The DIE may have DW_AT_byte_size set. For example an OpenCL
+ implementation may choose to implement triple vectors using this
+ attribute. */
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
+ if (attr)
+ {
+ if (DW_UNSND (attr) >= TYPE_LENGTH (type))
+ TYPE_LENGTH (type) = DW_UNSND (attr);
+ else
+ complaint (&symfile_complaints,
+ _("DW_AT_byte_size for array type smaller "
+ "than the total size of elements"));
}
- xfree (cur_attrs);
-}
+ name = dwarf2_name (die, cu);
+ if (name)
+ TYPE_NAME (type) = name;
-/* Release the memory used by the abbrev table for a compilation unit. */
+ /* Install the type in the die. */
+ set_die_type (die, type, cu);
-static void
-dwarf2_free_abbrev_table (void *ptr_to_cu)
-{
- struct dwarf2_cu *cu = ptr_to_cu;
+ /* set_die_type should be already done. */
+ set_descriptive_type (type, die, cu);
- obstack_free (&cu->abbrev_obstack, NULL);
- cu->dwarf2_abbrevs = NULL;
-}
+ do_cleanups (back_to);
-/* Lookup an abbrev_info structure in the abbrev hash table. */
+ return type;
+}
-static struct abbrev_info *
-dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu)
+static enum dwarf_array_dim_ordering
+read_array_order (struct die_info *die, struct dwarf2_cu *cu)
{
- unsigned int hash_number;
- struct abbrev_info *abbrev;
+ struct attribute *attr;
- hash_number = number % ABBREV_HASH_SIZE;
- abbrev = cu->dwarf2_abbrevs[hash_number];
+ attr = dwarf2_attr (die, DW_AT_ordering, cu);
- while (abbrev)
+ if (attr) return DW_SND (attr);
+
+ /* GNU F77 is a special case, as at 08/2004 array type info is the
+ opposite order to the dwarf2 specification, but data is still
+ laid out as per normal fortran.
+
+ FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
+ version checking. */
+
+ if (cu->language == language_fortran
+ && cu->producer && strstr (cu->producer, "GNU F77"))
{
- if (abbrev->number == number)
- return abbrev;
- else
- abbrev = abbrev->next;
+ return DW_ORD_row_major;
}
- return NULL;
-}
-
-/* Returns nonzero if TAG represents a type that we might generate a partial
- symbol for. */
-static int
-is_type_tag_for_partial (int tag)
-{
- switch (tag)
+ switch (cu->language_defn->la_array_ordering)
{
-#if 0
- /* Some types that would be reasonable to generate partial symbols for,
- that we don't at present. */
- case DW_TAG_array_type:
- case DW_TAG_file_type:
- case DW_TAG_ptr_to_member_type:
- case DW_TAG_set_type:
- case DW_TAG_string_type:
- case DW_TAG_subroutine_type:
-#endif
- case DW_TAG_base_type:
- case DW_TAG_class_type:
- case DW_TAG_interface_type:
- case DW_TAG_enumeration_type:
- case DW_TAG_structure_type:
- case DW_TAG_subrange_type:
- case DW_TAG_typedef:
- case DW_TAG_union_type:
- return 1;
+ case array_column_major:
+ return DW_ORD_col_major;
+ case array_row_major:
default:
- return 0;
- }
+ return DW_ORD_row_major;
+ };
}
-/* Load all DIEs that are interesting for partial symbols into memory. */
+/* Extract all information from a DW_TAG_set_type DIE and put it in
+ the DIE's type field. */
-static struct partial_die_info *
-load_partial_dies (bfd *abfd, gdb_byte *buffer, gdb_byte *info_ptr,
- int building_psymtab, struct dwarf2_cu *cu)
+static struct type *
+read_set_type (struct die_info *die, struct dwarf2_cu *cu)
{
- struct partial_die_info *part_die;
- struct partial_die_info *parent_die, *last_die, *first_die = NULL;
- struct abbrev_info *abbrev;
- unsigned int bytes_read;
- unsigned int load_all = 0;
+ struct type *domain_type, *set_type;
+ struct attribute *attr;
- int nesting_level = 1;
+ domain_type = die_type (die, cu);
- parent_die = NULL;
- last_die = NULL;
+ /* The die_type call above may have already set the type for this DIE. */
+ set_type = get_die_type (die, cu);
+ if (set_type)
+ return set_type;
- if (cu->per_cu && cu->per_cu->load_all_dies)
- load_all = 1;
+ set_type = create_set_type (NULL, domain_type);
- cu->partial_dies
- = htab_create_alloc_ex (cu->header.length / 12,
- partial_die_hash,
- partial_die_eq,
- NULL,
- &cu->comp_unit_obstack,
- hashtab_obstack_allocate,
- dummy_obstack_deallocate);
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
+ if (attr)
+ TYPE_LENGTH (set_type) = DW_UNSND (attr);
- part_die = obstack_alloc (&cu->comp_unit_obstack,
- sizeof (struct partial_die_info));
+ return set_die_type (die, set_type, cu);
+}
- while (1)
- {
- abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
+/* First cut: install each common block member as a global variable. */
- /* A NULL abbrev means the end of a series of children. */
- if (abbrev == NULL)
- {
- if (--nesting_level == 0)
- {
- /* PART_DIE was probably the last thing allocated on the
- comp_unit_obstack, so we could call obstack_free
- here. We don't do that because the waste is small,
- and will be cleaned up when we're done with this
- compilation unit. This way, we're also more robust
- against other users of the comp_unit_obstack. */
- return first_die;
- }
- info_ptr += bytes_read;
- last_die = parent_die;
- parent_die = parent_die->die_parent;
- continue;
- }
+static void
+read_common_block (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct die_info *child_die;
+ struct attribute *attr;
+ struct symbol *sym;
+ CORE_ADDR base = (CORE_ADDR) 0;
- /* Check whether this DIE is interesting enough to save. Normally
- we would not be interested in members here, but there may be
- later variables referencing them via DW_AT_specification (for
- static members). */
- if (!load_all
- && !is_type_tag_for_partial (abbrev->tag)
- && abbrev->tag != DW_TAG_enumerator
- && abbrev->tag != DW_TAG_subprogram
- && abbrev->tag != DW_TAG_lexical_block
- && abbrev->tag != DW_TAG_variable
- && abbrev->tag != DW_TAG_namespace
- && abbrev->tag != DW_TAG_module
- && abbrev->tag != DW_TAG_member)
+ attr = dwarf2_attr (die, DW_AT_location, cu);
+ if (attr)
+ {
+ /* Support the .debug_loc offsets. */
+ if (attr_form_is_block (attr))
+ {
+ base = decode_locdesc (DW_BLOCK (attr), cu);
+ }
+ else if (attr_form_is_section_offset (attr))
+ {
+ dwarf2_complex_location_expr_complaint ();
+ }
+ else
+ {
+ dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
+ "common block member");
+ }
+ }
+ if (die->child != NULL)
+ {
+ child_die = die->child;
+ while (child_die && child_die->tag)
{
- /* Otherwise we skip to the next sibling, if any. */
- info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
- continue;
- }
+ sym = new_symbol (child_die, NULL, cu);
+ attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu);
+ if (sym != NULL && attr != NULL)
+ {
+ CORE_ADDR byte_offset = 0;
- info_ptr = read_partial_die (part_die, abbrev, bytes_read, abfd,
- buffer, info_ptr, cu);
+ if (attr_form_is_section_offset (attr))
+ dwarf2_complex_location_expr_complaint ();
+ else if (attr_form_is_constant (attr))
+ byte_offset = dwarf2_get_attr_constant_value (attr, 0);
+ else if (attr_form_is_block (attr))
+ byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
+ else
+ dwarf2_complex_location_expr_complaint ();
- /* This two-pass algorithm for processing partial symbols has a
- high cost in cache pressure. Thus, handle some simple cases
- here which cover the majority of C partial symbols. DIEs
- which neither have specification tags in them, nor could have
- specification tags elsewhere pointing at them, can simply be
- processed and discarded.
+ SYMBOL_VALUE_ADDRESS (sym) = base + byte_offset;
+ add_symbol_to_list (sym, &global_symbols);
+ }
+ child_die = sibling_die (child_die);
+ }
+ }
+}
- This segment is also optional; scan_partial_symbols and
- add_partial_symbol will handle these DIEs if we chain
- them in normally. When compilers which do not emit large
- quantities of duplicate debug information are more common,
- this code can probably be removed. */
+/* Create a type for a C++ namespace. */
- /* Any complete simple types at the top level (pretty much all
- of them, for a language without namespaces), can be processed
- directly. */
- if (parent_die == NULL
- && part_die->has_specification == 0
- && part_die->is_declaration == 0
- && (part_die->tag == DW_TAG_typedef
- || part_die->tag == DW_TAG_base_type
- || part_die->tag == DW_TAG_subrange_type))
- {
- if (building_psymtab && part_die->name != NULL)
- add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
- VAR_DOMAIN, LOC_TYPEDEF,
- &cu->objfile->static_psymbols,
- 0, (CORE_ADDR) 0, cu->language, cu->objfile);
- info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
- continue;
- }
+static struct type *
+read_namespace_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ const char *previous_prefix, *name;
+ int is_anonymous;
+ struct type *type;
- /* If we're at the second level, and we're an enumerator, and
- our parent has no specification (meaning possibly lives in a
- namespace elsewhere), then we can add the partial symbol now
- instead of queueing it. */
- if (part_die->tag == DW_TAG_enumerator
- && parent_die != NULL
- && parent_die->die_parent == NULL
- && parent_die->tag == DW_TAG_enumeration_type
- && parent_die->has_specification == 0)
- {
- if (part_die->name == NULL)
- complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
- else if (building_psymtab)
- add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
- VAR_DOMAIN, LOC_CONST,
- (cu->language == language_cplus
- || cu->language == language_java)
- ? &cu->objfile->global_psymbols
- : &cu->objfile->static_psymbols,
- 0, (CORE_ADDR) 0, cu->language, cu->objfile);
+ /* For extensions, reuse the type of the original namespace. */
+ if (dwarf2_attr (die, DW_AT_extension, cu) != NULL)
+ {
+ struct die_info *ext_die;
+ struct dwarf2_cu *ext_cu = cu;
- info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
- continue;
- }
+ ext_die = dwarf2_extension (die, &ext_cu);
+ type = read_type_die (ext_die, ext_cu);
- /* We'll save this DIE so link it in. */
- part_die->die_parent = parent_die;
- part_die->die_sibling = NULL;
- part_die->die_child = NULL;
+ /* EXT_CU may not be the same as CU.
+ Ensure TYPE is recorded in CU's type_hash table. */
+ return set_die_type (die, type, cu);
+ }
- if (last_die && last_die == parent_die)
- last_die->die_child = part_die;
- else if (last_die)
- last_die->die_sibling = part_die;
+ name = namespace_name (die, &is_anonymous, cu);
- last_die = part_die;
+ /* Now build the name of the current namespace. */
- if (first_die == NULL)
- first_die = part_die;
+ previous_prefix = determine_prefix (die, cu);
+ if (previous_prefix[0] != '\0')
+ name = typename_concat (&objfile->objfile_obstack,
+ previous_prefix, name, 0, cu);
- /* Maybe add the DIE to the hash table. Not all DIEs that we
- find interesting need to be in the hash table, because we
- also have the parent/sibling/child chains; only those that we
- might refer to by offset later during partial symbol reading.
+ /* Create the type. */
+ type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL,
+ objfile);
+ TYPE_NAME (type) = (char *) name;
+ TYPE_TAG_NAME (type) = TYPE_NAME (type);
- For now this means things that might have be the target of a
- DW_AT_specification, DW_AT_abstract_origin, or
- DW_AT_extension. DW_AT_extension will refer only to
- namespaces; DW_AT_abstract_origin refers to functions (and
- many things under the function DIE, but we do not recurse
- into function DIEs during partial symbol reading) and
- possibly variables as well; DW_AT_specification refers to
- declarations. Declarations ought to have the DW_AT_declaration
- flag. It happens that GCC forgets to put it in sometimes, but
- only for functions, not for types.
+ return set_die_type (die, type, cu);
+}
- Adding more things than necessary to the hash table is harmless
- except for the performance cost. Adding too few will result in
- wasted time in find_partial_die, when we reread the compilation
- unit with load_all_dies set. */
+/* Read a C++ namespace. */
- if (load_all
- || abbrev->tag == DW_TAG_subprogram
- || abbrev->tag == DW_TAG_variable
- || abbrev->tag == DW_TAG_namespace
- || part_die->is_declaration)
- {
- void **slot;
+static void
+read_namespace (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ int is_anonymous;
- slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
- part_die->offset, INSERT);
- *slot = part_die;
- }
+ /* Add a symbol associated to this if we haven't seen the namespace
+ before. Also, add a using directive if it's an anonymous
+ namespace. */
- part_die = obstack_alloc (&cu->comp_unit_obstack,
- sizeof (struct partial_die_info));
+ if (dwarf2_attr (die, DW_AT_extension, cu) == NULL)
+ {
+ struct type *type;
- /* For some DIEs we want to follow their children (if any). For C
- we have no reason to follow the children of structures; for other
- languages we have to, both so that we can get at method physnames
- to infer fully qualified class names, and for DW_AT_specification.
+ type = read_type_die (die, cu);
+ new_symbol (die, type, cu);
- For Ada, we need to scan the children of subprograms and lexical
- blocks as well because Ada allows the definition of nested
- entities that could be interesting for the debugger, such as
- nested subprograms for instance. */
- if (last_die->has_children
- && (load_all
- || last_die->tag == DW_TAG_namespace
- || last_die->tag == DW_TAG_module
- || last_die->tag == DW_TAG_enumeration_type
- || (cu->language != language_c
- && (last_die->tag == DW_TAG_class_type
- || last_die->tag == DW_TAG_interface_type
- || last_die->tag == DW_TAG_structure_type
- || last_die->tag == DW_TAG_union_type))
- || (cu->language == language_ada
- && (last_die->tag == DW_TAG_subprogram
- || last_die->tag == DW_TAG_lexical_block))))
+ namespace_name (die, &is_anonymous, cu);
+ if (is_anonymous)
{
- nesting_level++;
- parent_die = last_die;
- continue;
+ const char *previous_prefix = determine_prefix (die, cu);
+
+ cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL,
+ NULL, &objfile->objfile_obstack);
}
+ }
- /* Otherwise we skip to the next sibling, if any. */
- info_ptr = locate_pdi_sibling (last_die, buffer, info_ptr, abfd, cu);
+ if (die->child != NULL)
+ {
+ struct die_info *child_die = die->child;
- /* Back to the top, do it again. */
+ while (child_die && child_die->tag)
+ {
+ process_die (child_die, cu);
+ child_die = sibling_die (child_die);
+ }
}
}
-/* Read a minimal amount of information into the minimal die structure. */
+/* Read a Fortran module as type. This DIE can be only a declaration used for
+ imported module. Still we need that type as local Fortran "use ... only"
+ declaration imports depend on the created type in determine_prefix. */
-static gdb_byte *
-read_partial_die (struct partial_die_info *part_die,
- struct abbrev_info *abbrev,
- unsigned int abbrev_len, bfd *abfd,
- gdb_byte *buffer, gdb_byte *info_ptr,
- struct dwarf2_cu *cu)
+static struct type *
+read_module_type (struct die_info *die, struct dwarf2_cu *cu)
{
- unsigned int i;
- struct attribute attr;
- int has_low_pc_attr = 0;
- int has_high_pc_attr = 0;
+ struct objfile *objfile = cu->objfile;
+ char *module_name;
+ struct type *type;
- memset (part_die, 0, sizeof (struct partial_die_info));
+ module_name = dwarf2_name (die, cu);
+ if (!module_name)
+ complaint (&symfile_complaints,
+ _("DW_TAG_module has no name, offset 0x%x"),
+ die->offset);
+ type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile);
- part_die->offset = info_ptr - buffer;
+ /* determine_prefix uses TYPE_TAG_NAME. */
+ TYPE_TAG_NAME (type) = TYPE_NAME (type);
- info_ptr += abbrev_len;
+ return set_die_type (die, type, cu);
+}
- if (abbrev == NULL)
- return info_ptr;
+/* Read a Fortran module. */
- part_die->tag = abbrev->tag;
- part_die->has_children = abbrev->has_children;
+static void
+read_module (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct die_info *child_die = die->child;
- for (i = 0; i < abbrev->num_attrs; ++i)
+ while (child_die && child_die->tag)
{
- info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu);
+ process_die (child_die, cu);
+ child_die = sibling_die (child_die);
+ }
+}
- /* Store the data if it is of an attribute we want to keep in a
- partial symbol table. */
- switch (attr.name)
- {
- case DW_AT_name:
- switch (part_die->tag)
- {
- case DW_TAG_compile_unit:
- case DW_TAG_type_unit:
- /* Compilation units have a DW_AT_name that is a filename, not
- a source language identifier. */
- case DW_TAG_enumeration_type:
- case DW_TAG_enumerator:
- /* These tags always have simple identifiers already; no need
- to canonicalize them. */
- part_die->name = DW_STRING (&attr);
- break;
- default:
- part_die->name
- = dwarf2_canonicalize_name (DW_STRING (&attr), cu,
- &cu->objfile->objfile_obstack);
- break;
- }
- break;
- case DW_AT_linkage_name:
- case DW_AT_MIPS_linkage_name:
- /* Note that both forms of linkage name might appear. We
- assume they will be the same, and we only store the last
- one we see. */
- if (cu->language == language_ada)
- part_die->name = DW_STRING (&attr);
- break;
- case DW_AT_low_pc:
- has_low_pc_attr = 1;
- part_die->lowpc = DW_ADDR (&attr);
- break;
- case DW_AT_high_pc:
- has_high_pc_attr = 1;
- part_die->highpc = DW_ADDR (&attr);
- break;
- case DW_AT_location:
- /* Support the .debug_loc offsets */
- if (attr_form_is_block (&attr))
- {
- part_die->locdesc = DW_BLOCK (&attr);
- }
- else if (attr_form_is_section_offset (&attr))
- {
- dwarf2_complex_location_expr_complaint ();
- }
- else
- {
- dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
- "partial symbol information");
- }
- break;
- case DW_AT_external:
- part_die->is_external = DW_UNSND (&attr);
- break;
- case DW_AT_declaration:
- part_die->is_declaration = DW_UNSND (&attr);
- break;
- case DW_AT_type:
- part_die->has_type = 1;
- break;
- case DW_AT_abstract_origin:
- case DW_AT_specification:
- case DW_AT_extension:
- part_die->has_specification = 1;
- part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
- break;
- case DW_AT_sibling:
- /* Ignore absolute siblings, they might point outside of
- the current compile unit. */
- if (attr.form == DW_FORM_ref_addr)
- complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
- else
- part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr);
- break;
- case DW_AT_byte_size:
- part_die->has_byte_size = 1;
- break;
- case DW_AT_calling_convention:
- /* DWARF doesn't provide a way to identify a program's source-level
- entry point. DW_AT_calling_convention attributes are only meant
- to describe functions' calling conventions.
+/* Return the name of the namespace represented by DIE. Set
+ *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
+ namespace. */
- However, because it's a necessary piece of information in
- Fortran, and because DW_CC_program is the only piece of debugging
- information whose definition refers to a 'main program' at all,
- several compilers have begun marking Fortran main programs with
- DW_CC_program --- even when those functions use the standard
- calling conventions.
+static const char *
+namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
+{
+ struct die_info *current_die;
+ const char *name = NULL;
- So until DWARF specifies a way to provide this information and
- compilers pick up the new representation, we'll support this
- practice. */
- if (DW_UNSND (&attr) == DW_CC_program
- && cu->language == language_fortran)
- set_main_name (part_die->name);
- break;
- default:
- break;
- }
+ /* Loop through the extensions until we find a name. */
+
+ for (current_die = die;
+ current_die != NULL;
+ current_die = dwarf2_extension (die, &cu))
+ {
+ name = dwarf2_name (current_die, cu);
+ if (name != NULL)
+ break;
}
- /* When using the GNU linker, .gnu.linkonce. sections are used to
- eliminate duplicate copies of functions and vtables and such.
- The linker will arbitrarily choose one and discard the others.
- The AT_*_pc values for such functions refer to local labels in
- these sections. If the section from that file was discarded, the
- labels are not in the output, so the relocs get a value of 0.
- If this is a discarded function, mark the pc bounds as invalid,
- so that GDB will ignore it. */
- if (has_low_pc_attr && has_high_pc_attr
- && part_die->lowpc < part_die->highpc
- && (part_die->lowpc != 0
- || dwarf2_per_objfile->has_section_at_zero))
- part_die->has_pc_info = 1;
+ /* Is it an anonymous namespace? */
- return info_ptr;
+ *is_anonymous = (name == NULL);
+ if (*is_anonymous)
+ name = "(anonymous namespace)";
+
+ return name;
}
-/* Find a cached partial DIE at OFFSET in CU. */
+/* Extract all information from a DW_TAG_pointer_type DIE and add to
+ the user defined type vector. */
-static struct partial_die_info *
-find_partial_die_in_comp_unit (unsigned int offset, struct dwarf2_cu *cu)
+static struct type *
+read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
{
- struct partial_die_info *lookup_die = NULL;
- struct partial_die_info part_die;
+ struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
+ struct comp_unit_head *cu_header = &cu->header;
+ struct type *type;
+ struct attribute *attr_byte_size;
+ struct attribute *attr_address_class;
+ int byte_size, addr_class;
+ struct type *target_type;
- part_die.offset = offset;
- lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset);
+ target_type = die_type (die, cu);
- return lookup_die;
-}
+ /* The die_type call above may have already set the type for this DIE. */
+ type = get_die_type (die, cu);
+ if (type)
+ return type;
-/* Find a partial DIE at OFFSET, which may or may not be in CU,
- except in the case of .debug_types DIEs which do not reference
- outside their CU (they do however referencing other types via
- DW_FORM_sig8). */
+ type = lookup_pointer_type (target_type);
-static struct partial_die_info *
-find_partial_die (unsigned int offset, struct dwarf2_cu *cu)
-{
- struct dwarf2_per_cu_data *per_cu = NULL;
- struct partial_die_info *pd = NULL;
+ attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
+ if (attr_byte_size)
+ byte_size = DW_UNSND (attr_byte_size);
+ else
+ byte_size = cu_header->addr_size;
- if (cu->per_cu->from_debug_types)
- {
- pd = find_partial_die_in_comp_unit (offset, cu);
- if (pd != NULL)
- return pd;
- goto not_found;
- }
+ attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
+ if (attr_address_class)
+ addr_class = DW_UNSND (attr_address_class);
+ else
+ addr_class = DW_ADDR_none;
- if (offset_in_cu_p (&cu->header, offset))
+ /* If the pointer size or address class is different than the
+ default, create a type variant marked as such and set the
+ length accordingly. */
+ if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
{
- pd = find_partial_die_in_comp_unit (offset, cu);
- if (pd != NULL)
- return pd;
+ if (gdbarch_address_class_type_flags_p (gdbarch))
+ {
+ int type_flags;
+
+ type_flags = gdbarch_address_class_type_flags
+ (gdbarch, byte_size, addr_class);
+ gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
+ == 0);
+ type = make_type_with_address_space (type, type_flags);
+ }
+ else if (TYPE_LENGTH (type) != byte_size)
+ {
+ complaint (&symfile_complaints,
+ _("invalid pointer size %d"), byte_size);
+ }
+ else
+ {
+ /* Should we also complain about unhandled address classes? */
+ }
}
- per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
+ TYPE_LENGTH (type) = byte_size;
+ return set_die_type (die, type, cu);
+}
- if (per_cu->cu == NULL)
+/* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
+ the user defined type vector. */
+
+static struct type *
+read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct type *type;
+ struct type *to_type;
+ struct type *domain;
+
+ to_type = die_type (die, cu);
+ domain = die_containing_type (die, cu);
+
+ /* The calls above may have already set the type for this DIE. */
+ type = get_die_type (die, cu);
+ if (type)
+ return type;
+
+ if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
+ type = lookup_methodptr_type (to_type);
+ else
+ type = lookup_memberptr_type (to_type, domain);
+
+ return set_die_type (die, type, cu);
+}
+
+/* Extract all information from a DW_TAG_reference_type DIE and add to
+ the user defined type vector. */
+
+static struct type *
+read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct comp_unit_head *cu_header = &cu->header;
+ struct type *type, *target_type;
+ struct attribute *attr;
+
+ target_type = die_type (die, cu);
+
+ /* The die_type call above may have already set the type for this DIE. */
+ type = get_die_type (die, cu);
+ if (type)
+ return type;
+
+ type = lookup_reference_type (target_type);
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
+ if (attr)
{
- load_partial_comp_unit (per_cu, cu->objfile);
- per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
- dwarf2_per_objfile->read_in_chain = per_cu;
+ TYPE_LENGTH (type) = DW_UNSND (attr);
+ }
+ else
+ {
+ TYPE_LENGTH (type) = cu_header->addr_size;
}
+ return set_die_type (die, type, cu);
+}
- per_cu->cu->last_used = 0;
- pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
+static struct type *
+read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct type *base_type, *cv_type;
- if (pd == NULL && per_cu->load_all_dies == 0)
+ base_type = die_type (die, cu);
+
+ /* The die_type call above may have already set the type for this DIE. */
+ cv_type = get_die_type (die, cu);
+ if (cv_type)
+ return cv_type;
+
+ /* In case the const qualifier is applied to an array type, the element type
+ is so qualified, not the array type (section 6.7.3 of C99). */
+ if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY)
{
- struct cleanup *back_to;
- struct partial_die_info comp_unit_die;
- struct abbrev_info *abbrev;
- unsigned int bytes_read;
- char *info_ptr;
+ struct type *el_type, *inner_array;
- per_cu->load_all_dies = 1;
+ base_type = copy_type (base_type);
+ inner_array = base_type;
- /* Re-read the DIEs. */
- back_to = make_cleanup (null_cleanup, 0);
- if (per_cu->cu->dwarf2_abbrevs == NULL)
+ while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY)
{
- dwarf2_read_abbrevs (per_cu->cu->objfile->obfd, per_cu->cu);
- make_cleanup (dwarf2_free_abbrev_table, per_cu->cu);
+ TYPE_TARGET_TYPE (inner_array) =
+ copy_type (TYPE_TARGET_TYPE (inner_array));
+ inner_array = TYPE_TARGET_TYPE (inner_array);
}
- info_ptr = (dwarf2_per_objfile->info.buffer
- + per_cu->cu->header.offset
- + per_cu->cu->header.first_die_offset);
- abbrev = peek_die_abbrev (info_ptr, &bytes_read, per_cu->cu);
- info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
- per_cu->cu->objfile->obfd,
- dwarf2_per_objfile->info.buffer, info_ptr,
- per_cu->cu);
- if (comp_unit_die.has_children)
- load_partial_dies (per_cu->cu->objfile->obfd,
- dwarf2_per_objfile->info.buffer, info_ptr,
- 0, per_cu->cu);
- do_cleanups (back_to);
- pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
+ el_type = TYPE_TARGET_TYPE (inner_array);
+ TYPE_TARGET_TYPE (inner_array) =
+ make_cv_type (1, TYPE_VOLATILE (el_type), el_type, NULL);
+
+ return set_die_type (die, base_type, cu);
}
- not_found:
+ cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
+ return set_die_type (die, cv_type, cu);
+}
- if (pd == NULL)
- internal_error (__FILE__, __LINE__,
- _("could not find partial DIE 0x%x in cache [from module %s]\n"),
- offset, bfd_get_filename (cu->objfile->obfd));
- return pd;
+static struct type *
+read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct type *base_type, *cv_type;
+
+ base_type = die_type (die, cu);
+
+ /* The die_type call above may have already set the type for this DIE. */
+ cv_type = get_die_type (die, cu);
+ if (cv_type)
+ return cv_type;
+
+ cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
+ return set_die_type (die, cv_type, cu);
}
-/* Adjust PART_DIE before generating a symbol for it. This function
- may set the is_external flag or change the DIE's name. */
+/* Extract all information from a DW_TAG_string_type DIE and add to
+ the user defined type vector. It isn't really a user defined type,
+ but it behaves like one, with other DIE's using an AT_user_def_type
+ attribute to reference it. */
-static void
-fixup_partial_die (struct partial_die_info *part_die,
- struct dwarf2_cu *cu)
+static struct type *
+read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
{
- /* If we found a reference attribute and the DIE has no name, try
- to find a name in the referred to DIE. */
+ struct objfile *objfile = cu->objfile;
+ struct gdbarch *gdbarch = get_objfile_arch (objfile);
+ struct type *type, *range_type, *index_type, *char_type;
+ struct attribute *attr;
+ unsigned int length;
- if (part_die->name == NULL && part_die->has_specification)
+ attr = dwarf2_attr (die, DW_AT_string_length, cu);
+ if (attr)
{
- struct partial_die_info *spec_die;
+ length = DW_UNSND (attr);
+ }
+ else
+ {
+ /* Check for the DW_AT_byte_size attribute. */
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
+ if (attr)
+ {
+ length = DW_UNSND (attr);
+ }
+ else
+ {
+ length = 1;
+ }
+ }
- spec_die = find_partial_die (part_die->spec_offset, cu);
+ index_type = objfile_type (objfile)->builtin_int;
+ range_type = create_range_type (NULL, index_type, 1, length);
+ char_type = language_string_char_type (cu->language_defn, gdbarch);
+ type = create_string_type (NULL, char_type, range_type);
- fixup_partial_die (spec_die, cu);
+ return set_die_type (die, type, cu);
+}
- if (spec_die->name)
- {
- part_die->name = spec_die->name;
+/* Handle DIES due to C code like:
- /* Copy DW_AT_external attribute if it is set. */
- if (spec_die->is_external)
- part_die->is_external = spec_die->is_external;
- }
- }
+ struct foo
+ {
+ int (*funcp)(int a, long l);
+ int b;
+ };
- /* Set default names for some unnamed DIEs. */
- if (part_die->name == NULL && (part_die->tag == DW_TAG_structure_type
- || part_die->tag == DW_TAG_class_type))
- part_die->name = "(anonymous class)";
+ ('funcp' generates a DW_TAG_subroutine_type DIE). */
- if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
- part_die->name = "(anonymous namespace)";
+static struct type *
+read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct type *type; /* Type that this function returns. */
+ struct type *ftype; /* Function that returns above type. */
+ struct attribute *attr;
- if (part_die->tag == DW_TAG_structure_type
- || part_die->tag == DW_TAG_class_type
- || part_die->tag == DW_TAG_union_type)
- guess_structure_name (part_die, cu);
-}
+ type = die_type (die, cu);
-/* Read an attribute value described by an attribute form. */
+ /* The die_type call above may have already set the type for this DIE. */
+ ftype = get_die_type (die, cu);
+ if (ftype)
+ return ftype;
-static gdb_byte *
-read_attribute_value (struct attribute *attr, unsigned form,
- bfd *abfd, gdb_byte *info_ptr,
- struct dwarf2_cu *cu)
-{
- struct comp_unit_head *cu_header = &cu->header;
- unsigned int bytes_read;
- struct dwarf_block *blk;
+ ftype = lookup_function_type (type);
- attr->form = form;
- switch (form)
+ /* All functions in C++, Pascal and Java have prototypes. */
+ attr = dwarf2_attr (die, DW_AT_prototyped, cu);
+ if ((attr && (DW_UNSND (attr) != 0))
+ || cu->language == language_cplus
+ || cu->language == language_java
+ || cu->language == language_pascal)
+ TYPE_PROTOTYPED (ftype) = 1;
+ else if (producer_is_realview (cu->producer))
+ /* RealView does not emit DW_AT_prototyped. We can not
+ distinguish prototyped and unprototyped functions; default to
+ prototyped, since that is more common in modern code (and
+ RealView warns about unprototyped functions). */
+ TYPE_PROTOTYPED (ftype) = 1;
+
+ /* Store the calling convention in the type if it's available in
+ the subroutine die. Otherwise set the calling convention to
+ the default value DW_CC_normal. */
+ attr = dwarf2_attr (die, DW_AT_calling_convention, cu);
+ if (attr)
+ TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr);
+ else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL"))
+ TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL;
+ else
+ TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal;
+
+ /* We need to add the subroutine type to the die immediately so
+ we don't infinitely recurse when dealing with parameters
+ declared as the same subroutine type. */
+ set_die_type (die, ftype, cu);
+
+ if (die->child != NULL)
{
- case DW_FORM_ref_addr:
- if (cu->header.version == 2)
- DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
- else
- DW_ADDR (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
- info_ptr += bytes_read;
- break;
- case DW_FORM_addr:
- DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
- info_ptr += bytes_read;
- break;
- case DW_FORM_block2:
- blk = dwarf_alloc_block (cu);
- blk->size = read_2_bytes (abfd, info_ptr);
- info_ptr += 2;
- blk->data = read_n_bytes (abfd, info_ptr, blk->size);
- info_ptr += blk->size;
- DW_BLOCK (attr) = blk;
- break;
- case DW_FORM_block4:
- blk = dwarf_alloc_block (cu);
- blk->size = read_4_bytes (abfd, info_ptr);
- info_ptr += 4;
- blk->data = read_n_bytes (abfd, info_ptr, blk->size);
- info_ptr += blk->size;
- DW_BLOCK (attr) = blk;
- break;
- case DW_FORM_data2:
- DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
- info_ptr += 2;
- break;
- case DW_FORM_data4:
- DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
- info_ptr += 4;
- break;
- case DW_FORM_data8:
- DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
- info_ptr += 8;
- break;
- case DW_FORM_sec_offset:
- DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
- info_ptr += bytes_read;
- break;
- case DW_FORM_string:
- DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
- DW_STRING_IS_CANONICAL (attr) = 0;
- info_ptr += bytes_read;
- break;
- case DW_FORM_strp:
- DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
- &bytes_read);
- DW_STRING_IS_CANONICAL (attr) = 0;
- info_ptr += bytes_read;
- break;
- case DW_FORM_exprloc:
- case DW_FORM_block:
- blk = dwarf_alloc_block (cu);
- blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
- info_ptr += bytes_read;
- blk->data = read_n_bytes (abfd, info_ptr, blk->size);
- info_ptr += blk->size;
- DW_BLOCK (attr) = blk;
- break;
- case DW_FORM_block1:
- blk = dwarf_alloc_block (cu);
- blk->size = read_1_byte (abfd, info_ptr);
- info_ptr += 1;
- blk->data = read_n_bytes (abfd, info_ptr, blk->size);
- info_ptr += blk->size;
- DW_BLOCK (attr) = blk;
- break;
- case DW_FORM_data1:
- DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
- info_ptr += 1;
- break;
- case DW_FORM_flag:
- DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
- info_ptr += 1;
- break;
- case DW_FORM_flag_present:
- DW_UNSND (attr) = 1;
- break;
- case DW_FORM_sdata:
- DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
- info_ptr += bytes_read;
- break;
- case DW_FORM_udata:
- DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
- info_ptr += bytes_read;
- break;
- case DW_FORM_ref1:
- DW_ADDR (attr) = cu->header.offset + read_1_byte (abfd, info_ptr);
- info_ptr += 1;
- break;
- case DW_FORM_ref2:
- DW_ADDR (attr) = cu->header.offset + read_2_bytes (abfd, info_ptr);
- info_ptr += 2;
- break;
- case DW_FORM_ref4:
- DW_ADDR (attr) = cu->header.offset + read_4_bytes (abfd, info_ptr);
- info_ptr += 4;
- break;
- case DW_FORM_ref8:
- DW_ADDR (attr) = cu->header.offset + read_8_bytes (abfd, info_ptr);
- info_ptr += 8;
- break;
- case DW_FORM_sig8:
- /* Convert the signature to something we can record in DW_UNSND
- for later lookup.
- NOTE: This is NULL if the type wasn't found. */
- DW_SIGNATURED_TYPE (attr) =
- lookup_signatured_type (cu->objfile, read_8_bytes (abfd, info_ptr));
- info_ptr += 8;
- break;
- case DW_FORM_ref_udata:
- DW_ADDR (attr) = (cu->header.offset
- + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
- info_ptr += bytes_read;
- break;
- case DW_FORM_indirect:
- form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
- info_ptr += bytes_read;
- info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu);
- break;
- default:
- error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
- dwarf_form_name (form),
- bfd_get_filename (abfd));
- }
+ struct type *void_type = objfile_type (cu->objfile)->builtin_void;
+ struct die_info *child_die;
+ int nparams, iparams;
- /* We have seen instances where the compiler tried to emit a byte
- size attribute of -1 which ended up being encoded as an unsigned
- 0xffffffff. Although 0xffffffff is technically a valid size value,
- an object of this size seems pretty unlikely so we can relatively
- safely treat these cases as if the size attribute was invalid and
- treat them as zero by default. */
- if (attr->name == DW_AT_byte_size
- && form == DW_FORM_data4
- && DW_UNSND (attr) >= 0xffffffff)
- {
- complaint
- (&symfile_complaints,
- _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
- hex_string (DW_UNSND (attr)));
- DW_UNSND (attr) = 0;
- }
+ /* Count the number of parameters.
+ FIXME: GDB currently ignores vararg functions, but knows about
+ vararg member functions. */
+ nparams = 0;
+ child_die = die->child;
+ while (child_die && child_die->tag)
+ {
+ if (child_die->tag == DW_TAG_formal_parameter)
+ nparams++;
+ else if (child_die->tag == DW_TAG_unspecified_parameters)
+ TYPE_VARARGS (ftype) = 1;
+ child_die = sibling_die (child_die);
+ }
- return info_ptr;
-}
+ /* Allocate storage for parameters and fill them in. */
+ TYPE_NFIELDS (ftype) = nparams;
+ TYPE_FIELDS (ftype) = (struct field *)
+ TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
-/* Read an attribute described by an abbreviated attribute. */
+ /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
+ even if we error out during the parameters reading below. */
+ for (iparams = 0; iparams < nparams; iparams++)
+ TYPE_FIELD_TYPE (ftype, iparams) = void_type;
-static gdb_byte *
-read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
- bfd *abfd, gdb_byte *info_ptr, struct dwarf2_cu *cu)
-{
- attr->name = abbrev->name;
- return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu);
-}
+ iparams = 0;
+ child_die = die->child;
+ while (child_die && child_die->tag)
+ {
+ if (child_die->tag == DW_TAG_formal_parameter)
+ {
+ struct type *arg_type;
-/* read dwarf information from a buffer */
+ /* DWARF version 2 has no clean way to discern C++
+ static and non-static member functions. G++ helps
+ GDB by marking the first parameter for non-static
+ member functions (which is the this pointer) as
+ artificial. We pass this information to
+ dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
-static unsigned int
-read_1_byte (bfd *abfd, gdb_byte *buf)
-{
- return bfd_get_8 (abfd, buf);
-}
+ DWARF version 3 added DW_AT_object_pointer, which GCC
+ 4.5 does not yet generate. */
+ attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
+ if (attr)
+ TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
+ else
+ {
+ TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
-static int
-read_1_signed_byte (bfd *abfd, gdb_byte *buf)
-{
- return bfd_get_signed_8 (abfd, buf);
-}
+ /* GCC/43521: In java, the formal parameter
+ "this" is sometimes not marked with DW_AT_artificial. */
+ if (cu->language == language_java)
+ {
+ const char *name = dwarf2_name (child_die, cu);
-static unsigned int
-read_2_bytes (bfd *abfd, gdb_byte *buf)
-{
- return bfd_get_16 (abfd, buf);
-}
+ if (name && !strcmp (name, "this"))
+ TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1;
+ }
+ }
+ arg_type = die_type (child_die, cu);
-static int
-read_2_signed_bytes (bfd *abfd, gdb_byte *buf)
-{
- return bfd_get_signed_16 (abfd, buf);
-}
+ /* RealView does not mark THIS as const, which the testsuite
+ expects. GCC marks THIS as const in method definitions,
+ but not in the class specifications (GCC PR 43053). */
+ if (cu->language == language_cplus && !TYPE_CONST (arg_type)
+ && TYPE_FIELD_ARTIFICIAL (ftype, iparams))
+ {
+ int is_this = 0;
+ struct dwarf2_cu *arg_cu = cu;
+ const char *name = dwarf2_name (child_die, cu);
-static unsigned int
-read_4_bytes (bfd *abfd, gdb_byte *buf)
-{
- return bfd_get_32 (abfd, buf);
-}
+ attr = dwarf2_attr (die, DW_AT_object_pointer, cu);
+ if (attr)
+ {
+ /* If the compiler emits this, use it. */
+ if (follow_die_ref (die, attr, &arg_cu) == child_die)
+ is_this = 1;
+ }
+ else if (name && strcmp (name, "this") == 0)
+ /* Function definitions will have the argument names. */
+ is_this = 1;
+ else if (name == NULL && iparams == 0)
+ /* Declarations may not have the names, so like
+ elsewhere in GDB, assume an artificial first
+ argument is "this". */
+ is_this = 1;
+
+ if (is_this)
+ arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type),
+ arg_type, 0);
+ }
-static int
-read_4_signed_bytes (bfd *abfd, gdb_byte *buf)
-{
- return bfd_get_signed_32 (abfd, buf);
+ TYPE_FIELD_TYPE (ftype, iparams) = arg_type;
+ iparams++;
+ }
+ child_die = sibling_die (child_die);
+ }
+ }
+
+ return ftype;
}
-static ULONGEST
-read_8_bytes (bfd *abfd, gdb_byte *buf)
+static struct type *
+read_typedef (struct die_info *die, struct dwarf2_cu *cu)
{
- return bfd_get_64 (abfd, buf);
+ struct objfile *objfile = cu->objfile;
+ const char *name = NULL;
+ struct type *this_type;
+
+ name = dwarf2_full_name (NULL, die, cu);
+ this_type = init_type (TYPE_CODE_TYPEDEF, 0,
+ TYPE_FLAG_TARGET_STUB, NULL, objfile);
+ TYPE_NAME (this_type) = (char *) name;
+ set_die_type (die, this_type, cu);
+ TYPE_TARGET_TYPE (this_type) = die_type (die, cu);
+ return this_type;
}
-static CORE_ADDR
-read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
- unsigned int *bytes_read)
+/* Find a representation of a given base type and install
+ it in the TYPE field of the die. */
+
+static struct type *
+read_base_type (struct die_info *die, struct dwarf2_cu *cu)
{
- struct comp_unit_head *cu_header = &cu->header;
- CORE_ADDR retval = 0;
+ struct objfile *objfile = cu->objfile;
+ struct type *type;
+ struct attribute *attr;
+ int encoding = 0, size = 0;
+ char *name;
+ enum type_code code = TYPE_CODE_INT;
+ int type_flags = 0;
+ struct type *target_type = NULL;
- if (cu_header->signed_addr_p)
+ attr = dwarf2_attr (die, DW_AT_encoding, cu);
+ if (attr)
{
- switch (cu_header->addr_size)
- {
- case 2:
- retval = bfd_get_signed_16 (abfd, buf);
- break;
- case 4:
- retval = bfd_get_signed_32 (abfd, buf);
- break;
- case 8:
- retval = bfd_get_signed_64 (abfd, buf);
- break;
- default:
- internal_error (__FILE__, __LINE__,
- _("read_address: bad switch, signed [in module %s]"),
- bfd_get_filename (abfd));
- }
+ encoding = DW_UNSND (attr);
}
- else
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
+ if (attr)
{
- switch (cu_header->addr_size)
- {
- case 2:
- retval = bfd_get_16 (abfd, buf);
- break;
- case 4:
- retval = bfd_get_32 (abfd, buf);
- break;
- case 8:
- retval = bfd_get_64 (abfd, buf);
- break;
- default:
- internal_error (__FILE__, __LINE__,
- _("read_address: bad switch, unsigned [in module %s]"),
- bfd_get_filename (abfd));
- }
+ size = DW_UNSND (attr);
+ }
+ name = dwarf2_name (die, cu);
+ if (!name)
+ {
+ complaint (&symfile_complaints,
+ _("DW_AT_name missing from DW_TAG_base_type"));
}
- *bytes_read = cu_header->addr_size;
- return retval;
-}
-
-/* Read the initial length from a section. The (draft) DWARF 3
- specification allows the initial length to take up either 4 bytes
- or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
- bytes describe the length and all offsets will be 8 bytes in length
- instead of 4.
+ switch (encoding)
+ {
+ case DW_ATE_address:
+ /* Turn DW_ATE_address into a void * pointer. */
+ code = TYPE_CODE_PTR;
+ type_flags |= TYPE_FLAG_UNSIGNED;
+ target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
+ break;
+ case DW_ATE_boolean:
+ code = TYPE_CODE_BOOL;
+ type_flags |= TYPE_FLAG_UNSIGNED;
+ break;
+ case DW_ATE_complex_float:
+ code = TYPE_CODE_COMPLEX;
+ target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
+ break;
+ case DW_ATE_decimal_float:
+ code = TYPE_CODE_DECFLOAT;
+ break;
+ case DW_ATE_float:
+ code = TYPE_CODE_FLT;
+ break;
+ case DW_ATE_signed:
+ break;
+ case DW_ATE_unsigned:
+ type_flags |= TYPE_FLAG_UNSIGNED;
+ break;
+ case DW_ATE_signed_char:
+ if (cu->language == language_ada || cu->language == language_m2
+ || cu->language == language_pascal)
+ code = TYPE_CODE_CHAR;
+ break;
+ case DW_ATE_unsigned_char:
+ if (cu->language == language_ada || cu->language == language_m2
+ || cu->language == language_pascal)
+ code = TYPE_CODE_CHAR;
+ type_flags |= TYPE_FLAG_UNSIGNED;
+ break;
+ case DW_ATE_UTF:
+ /* We just treat this as an integer and then recognize the
+ type by name elsewhere. */
+ break;
- An older, non-standard 64-bit format is also handled by this
- function. The older format in question stores the initial length
- as an 8-byte quantity without an escape value. Lengths greater
- than 2^32 aren't very common which means that the initial 4 bytes
- is almost always zero. Since a length value of zero doesn't make
- sense for the 32-bit format, this initial zero can be considered to
- be an escape value which indicates the presence of the older 64-bit
- format. As written, the code can't detect (old format) lengths
- greater than 4GB. If it becomes necessary to handle lengths
- somewhat larger than 4GB, we could allow other small values (such
- as the non-sensical values of 1, 2, and 3) to also be used as
- escape values indicating the presence of the old format.
+ default:
+ complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
+ dwarf_type_encoding_name (encoding));
+ break;
+ }
- The value returned via bytes_read should be used to increment the
- relevant pointer after calling read_initial_length().
+ type = init_type (code, size, type_flags, NULL, objfile);
+ TYPE_NAME (type) = name;
+ TYPE_TARGET_TYPE (type) = target_type;
- [ Note: read_initial_length() and read_offset() are based on the
- document entitled "DWARF Debugging Information Format", revision
- 3, draft 8, dated November 19, 2001. This document was obtained
- from:
+ if (name && strcmp (name, "char") == 0)
+ TYPE_NOSIGN (type) = 1;
- http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
+ return set_die_type (die, type, cu);
+}
- This document is only a draft and is subject to change. (So beware.)
+/* Read the given DW_AT_subrange DIE. */
- Details regarding the older, non-standard 64-bit format were
- determined empirically by examining 64-bit ELF files produced by
- the SGI toolchain on an IRIX 6.5 machine.
+static struct type *
+read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct type *base_type;
+ struct type *range_type;
+ struct attribute *attr;
+ LONGEST low = 0;
+ LONGEST high = -1;
+ char *name;
+ LONGEST negative_mask;
- - Kevin, July 16, 2002
- ] */
+ base_type = die_type (die, cu);
+ /* Preserve BASE_TYPE's original type, just set its LENGTH. */
+ check_typedef (base_type);
-static LONGEST
-read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read)
-{
- LONGEST length = bfd_get_32 (abfd, buf);
+ /* The die_type call above may have already set the type for this DIE. */
+ range_type = get_die_type (die, cu);
+ if (range_type)
+ return range_type;
- if (length == 0xffffffff)
+ if (cu->language == language_fortran)
{
- length = bfd_get_64 (abfd, buf + 4);
- *bytes_read = 12;
+ /* FORTRAN implies a lower bound of 1, if not given. */
+ low = 1;
}
- else if (length == 0)
+
+ /* FIXME: For variable sized arrays either of these could be
+ a variable rather than a constant value. We'll allow it,
+ but we don't know how to handle it. */
+ attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
+ if (attr)
+ low = dwarf2_get_attr_constant_value (attr, 0);
+
+ attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
+ if (attr)
{
- /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
- length = bfd_get_64 (abfd, buf);
- *bytes_read = 8;
+ if (attr->form == DW_FORM_block1 || is_ref_attr (attr))
+ {
+ /* GCC encodes arrays with unspecified or dynamic length
+ with a DW_FORM_block1 attribute or a reference attribute.
+ FIXME: GDB does not yet know how to handle dynamic
+ arrays properly, treat them as arrays with unspecified
+ length for now.
+
+ FIXME: jimb/2003-09-22: GDB does not really know
+ how to handle arrays of unspecified length
+ either; we just represent them as zero-length
+ arrays. Choose an appropriate upper bound given
+ the lower bound we've computed above. */
+ high = low - 1;
+ }
+ else
+ high = dwarf2_get_attr_constant_value (attr, 1);
}
else
{
- *bytes_read = 4;
+ attr = dwarf2_attr (die, DW_AT_count, cu);
+ if (attr)
+ {
+ int count = dwarf2_get_attr_constant_value (attr, 1);
+ high = low + count - 1;
+ }
+ else
+ {
+ /* Unspecified array length. */
+ high = low - 1;
+ }
}
- return length;
-}
+ /* Dwarf-2 specifications explicitly allows to create subrange types
+ without specifying a base type.
+ In that case, the base type must be set to the type of
+ the lower bound, upper bound or count, in that order, if any of these
+ three attributes references an object that has a type.
+ If no base type is found, the Dwarf-2 specifications say that
+ a signed integer type of size equal to the size of an address should
+ be used.
+ For the following C code: `extern char gdb_int [];'
+ GCC produces an empty range DIE.
+ FIXME: muller/2010-05-28: Possible references to object for low bound,
+ high bound or count are not yet handled by this code. */
+ if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
+ {
+ struct objfile *objfile = cu->objfile;
+ struct gdbarch *gdbarch = get_objfile_arch (objfile);
+ int addr_size = gdbarch_addr_bit (gdbarch) /8;
+ struct type *int_type = objfile_type (objfile)->builtin_int;
-/* Cover function for read_initial_length.
- Returns the length of the object at BUF, and stores the size of the
- initial length in *BYTES_READ and stores the size that offsets will be in
- *OFFSET_SIZE.
- If the initial length size is not equivalent to that specified in
- CU_HEADER then issue a complaint.
- This is useful when reading non-comp-unit headers. */
+ /* Test "int", "long int", and "long long int" objfile types,
+ and select the first one having a size above or equal to the
+ architecture address size. */
+ if (int_type && TYPE_LENGTH (int_type) >= addr_size)
+ base_type = int_type;
+ else
+ {
+ int_type = objfile_type (objfile)->builtin_long;
+ if (int_type && TYPE_LENGTH (int_type) >= addr_size)
+ base_type = int_type;
+ else
+ {
+ int_type = objfile_type (objfile)->builtin_long_long;
+ if (int_type && TYPE_LENGTH (int_type) >= addr_size)
+ base_type = int_type;
+ }
+ }
+ }
-static LONGEST
-read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf,
- const struct comp_unit_head *cu_header,
- unsigned int *bytes_read,
- unsigned int *offset_size)
-{
- LONGEST length = read_initial_length (abfd, buf, bytes_read);
+ negative_mask =
+ (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1);
+ if (!TYPE_UNSIGNED (base_type) && (low & negative_mask))
+ low |= negative_mask;
+ if (!TYPE_UNSIGNED (base_type) && (high & negative_mask))
+ high |= negative_mask;
- gdb_assert (cu_header->initial_length_size == 4
- || cu_header->initial_length_size == 8
- || cu_header->initial_length_size == 12);
+ range_type = create_range_type (NULL, base_type, low, high);
- if (cu_header->initial_length_size != *bytes_read)
- complaint (&symfile_complaints,
- _("intermixed 32-bit and 64-bit DWARF sections"));
+ /* Mark arrays with dynamic length at least as an array of unspecified
+ length. GDB could check the boundary but before it gets implemented at
+ least allow accessing the array elements. */
+ if (attr && attr->form == DW_FORM_block1)
+ TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1;
- *offset_size = (*bytes_read == 4) ? 4 : 8;
- return length;
+ /* Ada expects an empty array on no boundary attributes. */
+ if (attr == NULL && cu->language != language_ada)
+ TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1;
+
+ name = dwarf2_name (die, cu);
+ if (name)
+ TYPE_NAME (range_type) = name;
+
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
+ if (attr)
+ TYPE_LENGTH (range_type) = DW_UNSND (attr);
+
+ set_die_type (die, range_type, cu);
+
+ /* set_die_type should be already done. */
+ set_descriptive_type (range_type, die, cu);
+
+ return range_type;
}
-/* Read an offset from the data stream. The size of the offset is
- given by cu_header->offset_size. */
+static struct type *
+read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct type *type;
-static LONGEST
-read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
- unsigned int *bytes_read)
+ /* For now, we only support the C meaning of an unspecified type: void. */
+
+ type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile);
+ TYPE_NAME (type) = dwarf2_name (die, cu);
+
+ return set_die_type (die, type, cu);
+}
+
+/* Trivial hash function for die_info: the hash value of a DIE
+ is its offset in .debug_info for this objfile. */
+
+static hashval_t
+die_hash (const void *item)
{
- LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size);
+ const struct die_info *die = item;
- *bytes_read = cu_header->offset_size;
- return offset;
+ return die->offset;
}
-/* Read an offset from the data stream. */
+/* Trivial comparison function for die_info structures: two DIEs
+ are equal if they have the same offset. */
-static LONGEST
-read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size)
+static int
+die_eq (const void *item_lhs, const void *item_rhs)
{
- LONGEST retval = 0;
+ const struct die_info *die_lhs = item_lhs;
+ const struct die_info *die_rhs = item_rhs;
- switch (offset_size)
+ return die_lhs->offset == die_rhs->offset;
+}
+
+/* Read a whole compilation unit into a linked list of dies. */
+
+static struct die_info *
+read_comp_unit (gdb_byte *info_ptr, struct dwarf2_cu *cu)
+{
+ struct die_reader_specs reader_specs;
+ int read_abbrevs = 0;
+ struct cleanup *back_to = NULL;
+ struct die_info *die;
+
+ if (cu->dwarf2_abbrevs == NULL)
{
- case 4:
- retval = bfd_get_32 (abfd, buf);
- break;
- case 8:
- retval = bfd_get_64 (abfd, buf);
- break;
- default:
- internal_error (__FILE__, __LINE__,
- _("read_offset_1: bad switch [in module %s]"),
- bfd_get_filename (abfd));
+ dwarf2_read_abbrevs (cu->objfile->obfd, cu);
+ back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
+ read_abbrevs = 1;
}
- return retval;
-}
+ gdb_assert (cu->die_hash == NULL);
+ cu->die_hash
+ = htab_create_alloc_ex (cu->header.length / 12,
+ die_hash,
+ die_eq,
+ NULL,
+ &cu->comp_unit_obstack,
+ hashtab_obstack_allocate,
+ dummy_obstack_deallocate);
-static gdb_byte *
-read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
-{
- /* If the size of a host char is 8 bits, we can return a pointer
- to the buffer, otherwise we have to copy the data to a buffer
- allocated on the temporary obstack. */
- gdb_assert (HOST_CHAR_BIT == 8);
- return buf;
+ init_cu_die_reader (&reader_specs, cu);
+
+ die = read_die_and_children (&reader_specs, info_ptr, &info_ptr, NULL);
+
+ if (read_abbrevs)
+ do_cleanups (back_to);
+
+ return die;
}
-static char *
-read_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
+/* Main entry point for reading a DIE and all children.
+ Read the DIE and dump it if requested. */
+
+static struct die_info *
+read_die_and_children (const struct die_reader_specs *reader,
+ gdb_byte *info_ptr,
+ gdb_byte **new_info_ptr,
+ struct die_info *parent)
{
- /* If the size of a host char is 8 bits, we can return a pointer
- to the string, otherwise we have to copy the string to a buffer
- allocated on the temporary obstack. */
- gdb_assert (HOST_CHAR_BIT == 8);
- if (*buf == '\0')
+ struct die_info *result = read_die_and_children_1 (reader, info_ptr,
+ new_info_ptr, parent);
+
+ if (dwarf2_die_debug)
{
- *bytes_read_ptr = 1;
- return NULL;
+ fprintf_unfiltered (gdb_stdlog,
+ "\nRead die from %s of %s:\n",
+ reader->buffer == dwarf2_per_objfile->info.buffer
+ ? ".debug_info"
+ : reader->buffer == dwarf2_per_objfile->types.buffer
+ ? ".debug_types"
+ : "unknown section",
+ reader->abfd->filename);
+ dump_die (result, dwarf2_die_debug);
}
- *bytes_read_ptr = strlen ((char *) buf) + 1;
- return (char *) buf;
+
+ return result;
}
-static char *
-read_indirect_string (bfd *abfd, gdb_byte *buf,
- const struct comp_unit_head *cu_header,
- unsigned int *bytes_read_ptr)
+/* Read a single die and all its descendents. Set the die's sibling
+ field to NULL; set other fields in the die correctly, and set all
+ of the descendents' fields correctly. Set *NEW_INFO_PTR to the
+ location of the info_ptr after reading all of those dies. PARENT
+ is the parent of the die in question. */
+
+static struct die_info *
+read_die_and_children_1 (const struct die_reader_specs *reader,
+ gdb_byte *info_ptr,
+ gdb_byte **new_info_ptr,
+ struct die_info *parent)
{
- LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr);
+ struct die_info *die;
+ gdb_byte *cur_ptr;
+ int has_children;
- dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str);
- if (dwarf2_per_objfile->str.buffer == NULL)
+ cur_ptr = read_full_die (reader, &die, info_ptr, &has_children);
+ if (die == NULL)
{
- error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
- bfd_get_filename (abfd));
+ *new_info_ptr = cur_ptr;
return NULL;
}
- if (str_offset >= dwarf2_per_objfile->str.size)
+ store_in_ref_table (die, reader->cu);
+
+ if (has_children)
+ die->child = read_die_and_siblings (reader, cur_ptr, new_info_ptr, die);
+ else
{
- error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
- bfd_get_filename (abfd));
- return NULL;
+ die->child = NULL;
+ *new_info_ptr = cur_ptr;
}
- gdb_assert (HOST_CHAR_BIT == 8);
- if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
- return NULL;
- return (char *) (dwarf2_per_objfile->str.buffer + str_offset);
+
+ die->sibling = NULL;
+ die->parent = parent;
+ return die;
}
-static unsigned long
-read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
+/* Read a die, all of its descendents, and all of its siblings; set
+ all of the fields of all of the dies correctly. Arguments are as
+ in read_die_and_children. */
+
+static struct die_info *
+read_die_and_siblings (const struct die_reader_specs *reader,
+ gdb_byte *info_ptr,
+ gdb_byte **new_info_ptr,
+ struct die_info *parent)
{
- unsigned long result;
- unsigned int num_read;
- int i, shift;
- unsigned char byte;
+ struct die_info *first_die, *last_sibling;
+ gdb_byte *cur_ptr;
+
+ cur_ptr = info_ptr;
+ first_die = last_sibling = NULL;
- result = 0;
- shift = 0;
- num_read = 0;
- i = 0;
while (1)
{
- byte = bfd_get_8 (abfd, buf);
- buf++;
- num_read++;
- result |= ((unsigned long)(byte & 127) << shift);
- if ((byte & 128) == 0)
+ struct die_info *die
+ = read_die_and_children_1 (reader, cur_ptr, &cur_ptr, parent);
+
+ if (die == NULL)
{
- break;
+ *new_info_ptr = cur_ptr;
+ return first_die;
}
- shift += 7;
- }
- *bytes_read_ptr = num_read;
- return result;
-}
-static long
-read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
-{
- long result;
- int i, shift, num_read;
- unsigned char byte;
+ if (!first_die)
+ first_die = die;
+ else
+ last_sibling->sibling = die;
- result = 0;
- shift = 0;
- num_read = 0;
- i = 0;
- while (1)
- {
- byte = bfd_get_8 (abfd, buf);
- buf++;
- num_read++;
- result |= ((long)(byte & 127) << shift);
- shift += 7;
- if ((byte & 128) == 0)
- {
- break;
- }
+ last_sibling = die;
}
- if ((shift < 8 * sizeof (result)) && (byte & 0x40))
- result |= -(((long)1) << shift);
- *bytes_read_ptr = num_read;
- return result;
}
-/* Return a pointer to just past the end of an LEB128 number in BUF. */
+/* Read the die from the .debug_info section buffer. Set DIEP to
+ point to a newly allocated die with its information, except for its
+ child, sibling, and parent fields. Set HAS_CHILDREN to tell
+ whether the die has children or not. */
static gdb_byte *
-skip_leb128 (bfd *abfd, gdb_byte *buf)
-{
- int byte;
+read_full_die (const struct die_reader_specs *reader,
+ struct die_info **diep, gdb_byte *info_ptr,
+ int *has_children)
+{
+ unsigned int abbrev_number, bytes_read, i, offset;
+ struct abbrev_info *abbrev;
+ struct die_info *die;
+ struct dwarf2_cu *cu = reader->cu;
+ bfd *abfd = reader->abfd;
- while (1)
+ offset = info_ptr - reader->buffer;
+ abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ if (!abbrev_number)
{
- byte = bfd_get_8 (abfd, buf);
- buf++;
- if ((byte & 128) == 0)
- return buf;
+ *diep = NULL;
+ *has_children = 0;
+ return info_ptr;
}
+
+ abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
+ if (!abbrev)
+ error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
+ abbrev_number,
+ bfd_get_filename (abfd));
+
+ die = dwarf_alloc_die (cu, abbrev->num_attrs);
+ die->offset = offset;
+ die->tag = abbrev->tag;
+ die->abbrev = abbrev_number;
+
+ die->num_attrs = abbrev->num_attrs;
+
+ for (i = 0; i < abbrev->num_attrs; ++i)
+ info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
+ abfd, info_ptr, cu);
+
+ *diep = die;
+ *has_children = abbrev->has_children;
+ return info_ptr;
}
+/* In DWARF version 2, the description of the debugging information is
+ stored in a separate .debug_abbrev section. Before we read any
+ dies from a section we read in all abbreviations and install them
+ in a hash table. This function also sets flags in CU describing
+ the data found in the abbrev table. */
+
static void
-set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
+dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu)
{
- switch (lang)
- {
- case DW_LANG_C89:
- case DW_LANG_C99:
- case DW_LANG_C:
- cu->language = language_c;
- break;
- case DW_LANG_C_plus_plus:
- cu->language = language_cplus;
- break;
- case DW_LANG_D:
- cu->language = language_d;
- break;
- case DW_LANG_Fortran77:
- case DW_LANG_Fortran90:
- case DW_LANG_Fortran95:
- cu->language = language_fortran;
- break;
- case DW_LANG_Mips_Assembler:
- cu->language = language_asm;
- break;
- case DW_LANG_Java:
- cu->language = language_java;
- break;
- case DW_LANG_Ada83:
- case DW_LANG_Ada95:
- cu->language = language_ada;
- break;
- case DW_LANG_Modula2:
- cu->language = language_m2;
- break;
- case DW_LANG_Pascal83:
- cu->language = language_pascal;
- break;
- case DW_LANG_ObjC:
- cu->language = language_objc;
- break;
- case DW_LANG_Cobol74:
- case DW_LANG_Cobol85:
- default:
- cu->language = language_minimal;
- break;
- }
- cu->language_defn = language_def (cu->language);
-}
+ struct comp_unit_head *cu_header = &cu->header;
+ gdb_byte *abbrev_ptr;
+ struct abbrev_info *cur_abbrev;
+ unsigned int abbrev_number, bytes_read, abbrev_name;
+ unsigned int abbrev_form, hash_number;
+ struct attr_abbrev *cur_attrs;
+ unsigned int allocated_attrs;
-/* Return the named attribute or NULL if not there. */
+ /* Initialize dwarf2 abbrevs. */
+ obstack_init (&cu->abbrev_obstack);
+ cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack,
+ (ABBREV_HASH_SIZE
+ * sizeof (struct abbrev_info *)));
+ memset (cu->dwarf2_abbrevs, 0,
+ ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
-static struct attribute *
-dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
-{
- unsigned int i;
- struct attribute *spec = NULL;
+ dwarf2_read_section (dwarf2_per_objfile->objfile,
+ &dwarf2_per_objfile->abbrev);
+ abbrev_ptr = dwarf2_per_objfile->abbrev.buffer + cu_header->abbrev_offset;
+ abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+ abbrev_ptr += bytes_read;
- for (i = 0; i < die->num_attrs; ++i)
- {
- if (die->attrs[i].name == name)
- return &die->attrs[i];
- if (die->attrs[i].name == DW_AT_specification
- || die->attrs[i].name == DW_AT_abstract_origin)
- spec = &die->attrs[i];
- }
+ allocated_attrs = ATTR_ALLOC_CHUNK;
+ cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
- if (spec)
+ /* Loop until we reach an abbrev number of 0. */
+ while (abbrev_number)
{
- die = follow_die_ref (die, spec, &cu);
- return dwarf2_attr (die, name, cu);
+ cur_abbrev = dwarf_alloc_abbrev (cu);
+
+ /* read in abbrev header */
+ cur_abbrev->number = abbrev_number;
+ cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+ abbrev_ptr += bytes_read;
+ cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
+ abbrev_ptr += 1;
+
+ if (cur_abbrev->tag == DW_TAG_namespace)
+ cu->has_namespace_info = 1;
+
+ /* now read in declarations */
+ abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+ abbrev_ptr += bytes_read;
+ abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+ abbrev_ptr += bytes_read;
+ while (abbrev_name)
+ {
+ if (cur_abbrev->num_attrs == allocated_attrs)
+ {
+ allocated_attrs += ATTR_ALLOC_CHUNK;
+ cur_attrs
+ = xrealloc (cur_attrs, (allocated_attrs
+ * sizeof (struct attr_abbrev)));
+ }
+
+ /* Record whether this compilation unit might have
+ inter-compilation-unit references. If we don't know what form
+ this attribute will have, then it might potentially be a
+ DW_FORM_ref_addr, so we conservatively expect inter-CU
+ references. */
+
+ if (abbrev_form == DW_FORM_ref_addr
+ || abbrev_form == DW_FORM_indirect)
+ cu->has_form_ref_addr = 1;
+
+ cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
+ cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
+ abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+ abbrev_ptr += bytes_read;
+ abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+ abbrev_ptr += bytes_read;
+ }
+
+ cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack,
+ (cur_abbrev->num_attrs
+ * sizeof (struct attr_abbrev)));
+ memcpy (cur_abbrev->attrs, cur_attrs,
+ cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
+
+ hash_number = abbrev_number % ABBREV_HASH_SIZE;
+ cur_abbrev->next = cu->dwarf2_abbrevs[hash_number];
+ cu->dwarf2_abbrevs[hash_number] = cur_abbrev;
+
+ /* Get next abbreviation.
+ Under Irix6 the abbreviations for a compilation unit are not
+ always properly terminated with an abbrev number of 0.
+ Exit loop if we encounter an abbreviation which we have
+ already read (which means we are about to read the abbreviations
+ for the next compile unit) or if the end of the abbreviation
+ table is reached. */
+ if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev.buffer)
+ >= dwarf2_per_objfile->abbrev.size)
+ break;
+ abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+ abbrev_ptr += bytes_read;
+ if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL)
+ break;
}
- return NULL;
+ xfree (cur_attrs);
}
-/* Return the named attribute or NULL if not there,
- but do not follow DW_AT_specification, etc.
- This is for use in contexts where we're reading .debug_types dies.
- Following DW_AT_specification, DW_AT_abstract_origin will take us
- back up the chain, and we want to go down. */
+/* Release the memory used by the abbrev table for a compilation unit. */
-static struct attribute *
-dwarf2_attr_no_follow (struct die_info *die, unsigned int name,
- struct dwarf2_cu *cu)
+static void
+dwarf2_free_abbrev_table (void *ptr_to_cu)
{
- unsigned int i;
-
- for (i = 0; i < die->num_attrs; ++i)
- if (die->attrs[i].name == name)
- return &die->attrs[i];
+ struct dwarf2_cu *cu = ptr_to_cu;
- return NULL;
+ obstack_free (&cu->abbrev_obstack, NULL);
+ cu->dwarf2_abbrevs = NULL;
}
-/* Return non-zero iff the attribute NAME is defined for the given DIE,
- and holds a non-zero value. This function should only be used for
- DW_FORM_flag or DW_FORM_flag_present attributes. */
+/* Lookup an abbrev_info structure in the abbrev hash table. */
-static int
-dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
+static struct abbrev_info *
+dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu)
{
- struct attribute *attr = dwarf2_attr (die, name, cu);
+ unsigned int hash_number;
+ struct abbrev_info *abbrev;
- return (attr && DW_UNSND (attr));
+ hash_number = number % ABBREV_HASH_SIZE;
+ abbrev = cu->dwarf2_abbrevs[hash_number];
+
+ while (abbrev)
+ {
+ if (abbrev->number == number)
+ return abbrev;
+ else
+ abbrev = abbrev->next;
+ }
+ return NULL;
}
+/* Returns nonzero if TAG represents a type that we might generate a partial
+ symbol for. */
+
static int
-die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
+is_type_tag_for_partial (int tag)
{
- /* A DIE is a declaration if it has a DW_AT_declaration attribute
- which value is non-zero. However, we have to be careful with
- DIEs having a DW_AT_specification attribute, because dwarf2_attr()
- (via dwarf2_flag_true_p) follows this attribute. So we may
- end up accidently finding a declaration attribute that belongs
- to a different DIE referenced by the specification attribute,
- even though the given DIE does not have a declaration attribute. */
- return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
- && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
+ switch (tag)
+ {
+#if 0
+ /* Some types that would be reasonable to generate partial symbols for,
+ that we don't at present. */
+ case DW_TAG_array_type:
+ case DW_TAG_file_type:
+ case DW_TAG_ptr_to_member_type:
+ case DW_TAG_set_type:
+ case DW_TAG_string_type:
+ case DW_TAG_subroutine_type:
+#endif
+ case DW_TAG_base_type:
+ case DW_TAG_class_type:
+ case DW_TAG_interface_type:
+ case DW_TAG_enumeration_type:
+ case DW_TAG_structure_type:
+ case DW_TAG_subrange_type:
+ case DW_TAG_typedef:
+ case DW_TAG_union_type:
+ return 1;
+ default:
+ return 0;
+ }
}
-/* Return the die giving the specification for DIE, if there is
- one. *SPEC_CU is the CU containing DIE on input, and the CU
- containing the return value on output. If there is no
- specification, but there is an abstract origin, that is
- returned. */
+/* Load all DIEs that are interesting for partial symbols into memory. */
-static struct die_info *
-die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
+static struct partial_die_info *
+load_partial_dies (bfd *abfd, gdb_byte *buffer, gdb_byte *info_ptr,
+ int building_psymtab, struct dwarf2_cu *cu)
{
- struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
- *spec_cu);
-
- if (spec_attr == NULL)
- spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu);
-
- if (spec_attr == NULL)
- return NULL;
- else
- return follow_die_ref (die, spec_attr, spec_cu);
-}
+ struct partial_die_info *part_die;
+ struct partial_die_info *parent_die, *last_die, *first_die = NULL;
+ struct abbrev_info *abbrev;
+ unsigned int bytes_read;
+ unsigned int load_all = 0;
-/* Free the line_header structure *LH, and any arrays and strings it
- refers to. */
-static void
-free_line_header (struct line_header *lh)
-{
- if (lh->standard_opcode_lengths)
- xfree (lh->standard_opcode_lengths);
+ int nesting_level = 1;
- /* Remember that all the lh->file_names[i].name pointers are
- pointers into debug_line_buffer, and don't need to be freed. */
- if (lh->file_names)
- xfree (lh->file_names);
+ parent_die = NULL;
+ last_die = NULL;
- /* Similarly for the include directory names. */
- if (lh->include_dirs)
- xfree (lh->include_dirs);
+ if (cu->per_cu && cu->per_cu->load_all_dies)
+ load_all = 1;
- xfree (lh);
-}
+ cu->partial_dies
+ = htab_create_alloc_ex (cu->header.length / 12,
+ partial_die_hash,
+ partial_die_eq,
+ NULL,
+ &cu->comp_unit_obstack,
+ hashtab_obstack_allocate,
+ dummy_obstack_deallocate);
+ part_die = obstack_alloc (&cu->comp_unit_obstack,
+ sizeof (struct partial_die_info));
-/* Add an entry to LH's include directory table. */
-static void
-add_include_dir (struct line_header *lh, char *include_dir)
-{
- /* Grow the array if necessary. */
- if (lh->include_dirs_size == 0)
- {
- lh->include_dirs_size = 1; /* for testing */
- lh->include_dirs = xmalloc (lh->include_dirs_size
- * sizeof (*lh->include_dirs));
- }
- else if (lh->num_include_dirs >= lh->include_dirs_size)
+ while (1)
{
- lh->include_dirs_size *= 2;
- lh->include_dirs = xrealloc (lh->include_dirs,
- (lh->include_dirs_size
- * sizeof (*lh->include_dirs)));
- }
-
- lh->include_dirs[lh->num_include_dirs++] = include_dir;
-}
-
-
-/* Add an entry to LH's file name table. */
-static void
-add_file_name (struct line_header *lh,
- char *name,
- unsigned int dir_index,
- unsigned int mod_time,
- unsigned int length)
-{
- struct file_entry *fe;
+ abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
- /* Grow the array if necessary. */
- if (lh->file_names_size == 0)
- {
- lh->file_names_size = 1; /* for testing */
- lh->file_names = xmalloc (lh->file_names_size
- * sizeof (*lh->file_names));
- }
- else if (lh->num_file_names >= lh->file_names_size)
- {
- lh->file_names_size *= 2;
- lh->file_names = xrealloc (lh->file_names,
- (lh->file_names_size
- * sizeof (*lh->file_names)));
- }
+ /* A NULL abbrev means the end of a series of children. */
+ if (abbrev == NULL)
+ {
+ if (--nesting_level == 0)
+ {
+ /* PART_DIE was probably the last thing allocated on the
+ comp_unit_obstack, so we could call obstack_free
+ here. We don't do that because the waste is small,
+ and will be cleaned up when we're done with this
+ compilation unit. This way, we're also more robust
+ against other users of the comp_unit_obstack. */
+ return first_die;
+ }
+ info_ptr += bytes_read;
+ last_die = parent_die;
+ parent_die = parent_die->die_parent;
+ continue;
+ }
- fe = &lh->file_names[lh->num_file_names++];
- fe->name = name;
- fe->dir_index = dir_index;
- fe->mod_time = mod_time;
- fe->length = length;
- fe->included_p = 0;
- fe->symtab = NULL;
-}
+ /* Check for template arguments. We never save these; if
+ they're seen, we just mark the parent, and go on our way. */
+ if (parent_die != NULL
+ && cu->language == language_cplus
+ && (abbrev->tag == DW_TAG_template_type_param
+ || abbrev->tag == DW_TAG_template_value_param))
+ {
+ parent_die->has_template_arguments = 1;
+ if (!load_all)
+ {
+ /* We don't need a partial DIE for the template argument. */
+ info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev,
+ cu);
+ continue;
+ }
+ }
-/* Read the statement program header starting at OFFSET in
- .debug_line, according to the endianness of ABFD. Return a pointer
- to a struct line_header, allocated using xmalloc.
+ /* We only recurse into subprograms looking for template arguments.
+ Skip their other children. */
+ if (!load_all
+ && cu->language == language_cplus
+ && parent_die != NULL
+ && parent_die->tag == DW_TAG_subprogram)
+ {
+ info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
+ continue;
+ }
- NOTE: the strings in the include directory and file name tables of
- the returned object point into debug_line_buffer, and must not be
- freed. */
-static struct line_header *
-dwarf_decode_line_header (unsigned int offset, bfd *abfd,
- struct dwarf2_cu *cu)
-{
- struct cleanup *back_to;
- struct line_header *lh;
- gdb_byte *line_ptr;
- unsigned int bytes_read, offset_size;
- int i;
- char *cur_dir, *cur_file;
+ /* Check whether this DIE is interesting enough to save. Normally
+ we would not be interested in members here, but there may be
+ later variables referencing them via DW_AT_specification (for
+ static members). */
+ if (!load_all
+ && !is_type_tag_for_partial (abbrev->tag)
+ && abbrev->tag != DW_TAG_constant
+ && abbrev->tag != DW_TAG_enumerator
+ && abbrev->tag != DW_TAG_subprogram
+ && abbrev->tag != DW_TAG_lexical_block
+ && abbrev->tag != DW_TAG_variable
+ && abbrev->tag != DW_TAG_namespace
+ && abbrev->tag != DW_TAG_module
+ && abbrev->tag != DW_TAG_member)
+ {
+ /* Otherwise we skip to the next sibling, if any. */
+ info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
+ continue;
+ }
- dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->line);
- if (dwarf2_per_objfile->line.buffer == NULL)
- {
- complaint (&symfile_complaints, _("missing .debug_line section"));
- return 0;
- }
+ info_ptr = read_partial_die (part_die, abbrev, bytes_read, abfd,
+ buffer, info_ptr, cu);
- /* Make sure that at least there's room for the total_length field.
- That could be 12 bytes long, but we're just going to fudge that. */
- if (offset + 4 >= dwarf2_per_objfile->line.size)
- {
- dwarf2_statement_list_fits_in_line_number_section_complaint ();
- return 0;
- }
+ /* This two-pass algorithm for processing partial symbols has a
+ high cost in cache pressure. Thus, handle some simple cases
+ here which cover the majority of C partial symbols. DIEs
+ which neither have specification tags in them, nor could have
+ specification tags elsewhere pointing at them, can simply be
+ processed and discarded.
- lh = xmalloc (sizeof (*lh));
- memset (lh, 0, sizeof (*lh));
- back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
- (void *) lh);
+ This segment is also optional; scan_partial_symbols and
+ add_partial_symbol will handle these DIEs if we chain
+ them in normally. When compilers which do not emit large
+ quantities of duplicate debug information are more common,
+ this code can probably be removed. */
- line_ptr = dwarf2_per_objfile->line.buffer + offset;
+ /* Any complete simple types at the top level (pretty much all
+ of them, for a language without namespaces), can be processed
+ directly. */
+ if (parent_die == NULL
+ && part_die->has_specification == 0
+ && part_die->is_declaration == 0
+ && (part_die->tag == DW_TAG_typedef
+ || part_die->tag == DW_TAG_base_type
+ || part_die->tag == DW_TAG_subrange_type))
+ {
+ if (building_psymtab && part_die->name != NULL)
+ add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
+ VAR_DOMAIN, LOC_TYPEDEF,
+ &cu->objfile->static_psymbols,
+ 0, (CORE_ADDR) 0, cu->language, cu->objfile);
+ info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
+ continue;
+ }
- /* Read in the header. */
- lh->total_length =
- read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header,
- &bytes_read, &offset_size);
- line_ptr += bytes_read;
- if (line_ptr + lh->total_length > (dwarf2_per_objfile->line.buffer
- + dwarf2_per_objfile->line.size))
- {
- dwarf2_statement_list_fits_in_line_number_section_complaint ();
- return 0;
- }
- lh->statement_program_end = line_ptr + lh->total_length;
- lh->version = read_2_bytes (abfd, line_ptr);
- line_ptr += 2;
- lh->header_length = read_offset_1 (abfd, line_ptr, offset_size);
- line_ptr += offset_size;
- lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
- line_ptr += 1;
- if (lh->version >= 4)
- {
- lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr);
- line_ptr += 1;
- }
- else
- lh->maximum_ops_per_instruction = 1;
-
- if (lh->maximum_ops_per_instruction == 0)
- {
- lh->maximum_ops_per_instruction = 1;
- complaint (&symfile_complaints,
- _("invalid maximum_ops_per_instruction in `.debug_line' section"));
- }
-
- lh->default_is_stmt = read_1_byte (abfd, line_ptr);
- line_ptr += 1;
- lh->line_base = read_1_signed_byte (abfd, line_ptr);
- line_ptr += 1;
- lh->line_range = read_1_byte (abfd, line_ptr);
- line_ptr += 1;
- lh->opcode_base = read_1_byte (abfd, line_ptr);
- line_ptr += 1;
- lh->standard_opcode_lengths
- = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
+ /* If we're at the second level, and we're an enumerator, and
+ our parent has no specification (meaning possibly lives in a
+ namespace elsewhere), then we can add the partial symbol now
+ instead of queueing it. */
+ if (part_die->tag == DW_TAG_enumerator
+ && parent_die != NULL
+ && parent_die->die_parent == NULL
+ && parent_die->tag == DW_TAG_enumeration_type
+ && parent_die->has_specification == 0)
+ {
+ if (part_die->name == NULL)
+ complaint (&symfile_complaints,
+ _("malformed enumerator DIE ignored"));
+ else if (building_psymtab)
+ add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
+ VAR_DOMAIN, LOC_CONST,
+ (cu->language == language_cplus
+ || cu->language == language_java)
+ ? &cu->objfile->global_psymbols
+ : &cu->objfile->static_psymbols,
+ 0, (CORE_ADDR) 0, cu->language, cu->objfile);
- lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
- for (i = 1; i < lh->opcode_base; ++i)
- {
- lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
- line_ptr += 1;
- }
+ info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
+ continue;
+ }
- /* Read directory table. */
- while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
- {
- line_ptr += bytes_read;
- add_include_dir (lh, cur_dir);
- }
- line_ptr += bytes_read;
+ /* We'll save this DIE so link it in. */
+ part_die->die_parent = parent_die;
+ part_die->die_sibling = NULL;
+ part_die->die_child = NULL;
- /* Read file name table. */
- while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
- {
- unsigned int dir_index, mod_time, length;
+ if (last_die && last_die == parent_die)
+ last_die->die_child = part_die;
+ else if (last_die)
+ last_die->die_sibling = part_die;
- line_ptr += bytes_read;
- dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
+ last_die = part_die;
- add_file_name (lh, cur_file, dir_index, mod_time, length);
- }
- line_ptr += bytes_read;
- lh->statement_program_start = line_ptr;
+ if (first_die == NULL)
+ first_die = part_die;
- if (line_ptr > (dwarf2_per_objfile->line.buffer
- + dwarf2_per_objfile->line.size))
- complaint (&symfile_complaints,
- _("line number info header doesn't fit in `.debug_line' section"));
+ /* Maybe add the DIE to the hash table. Not all DIEs that we
+ find interesting need to be in the hash table, because we
+ also have the parent/sibling/child chains; only those that we
+ might refer to by offset later during partial symbol reading.
- discard_cleanups (back_to);
- return lh;
-}
+ For now this means things that might have be the target of a
+ DW_AT_specification, DW_AT_abstract_origin, or
+ DW_AT_extension. DW_AT_extension will refer only to
+ namespaces; DW_AT_abstract_origin refers to functions (and
+ many things under the function DIE, but we do not recurse
+ into function DIEs during partial symbol reading) and
+ possibly variables as well; DW_AT_specification refers to
+ declarations. Declarations ought to have the DW_AT_declaration
+ flag. It happens that GCC forgets to put it in sometimes, but
+ only for functions, not for types.
-/* This function exists to work around a bug in certain compilers
- (particularly GCC 2.95), in which the first line number marker of a
- function does not show up until after the prologue, right before
- the second line number marker. This function shifts ADDRESS down
- to the beginning of the function if necessary, and is called on
- addresses passed to record_line. */
+ Adding more things than necessary to the hash table is harmless
+ except for the performance cost. Adding too few will result in
+ wasted time in find_partial_die, when we reread the compilation
+ unit with load_all_dies set. */
-static CORE_ADDR
-check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu)
-{
- struct function_range *fn;
+ if (load_all
+ || abbrev->tag == DW_TAG_constant
+ || abbrev->tag == DW_TAG_subprogram
+ || abbrev->tag == DW_TAG_variable
+ || abbrev->tag == DW_TAG_namespace
+ || part_die->is_declaration)
+ {
+ void **slot;
- /* Find the function_range containing address. */
- if (!cu->first_fn)
- return address;
+ slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
+ part_die->offset, INSERT);
+ *slot = part_die;
+ }
- if (!cu->cached_fn)
- cu->cached_fn = cu->first_fn;
+ part_die = obstack_alloc (&cu->comp_unit_obstack,
+ sizeof (struct partial_die_info));
- fn = cu->cached_fn;
- while (fn)
- if (fn->lowpc <= address && fn->highpc > address)
- goto found;
- else
- fn = fn->next;
+ /* For some DIEs we want to follow their children (if any). For C
+ we have no reason to follow the children of structures; for other
+ languages we have to, so that we can get at method physnames
+ to infer fully qualified class names, for DW_AT_specification,
+ and for C++ template arguments. For C++, we also look one level
+ inside functions to find template arguments (if the name of the
+ function does not already contain the template arguments).
- fn = cu->first_fn;
- while (fn && fn != cu->cached_fn)
- if (fn->lowpc <= address && fn->highpc > address)
- goto found;
- else
- fn = fn->next;
+ For Ada, we need to scan the children of subprograms and lexical
+ blocks as well because Ada allows the definition of nested
+ entities that could be interesting for the debugger, such as
+ nested subprograms for instance. */
+ if (last_die->has_children
+ && (load_all
+ || last_die->tag == DW_TAG_namespace
+ || last_die->tag == DW_TAG_module
+ || last_die->tag == DW_TAG_enumeration_type
+ || (cu->language == language_cplus
+ && last_die->tag == DW_TAG_subprogram
+ && (last_die->name == NULL
+ || strchr (last_die->name, '<') == NULL))
+ || (cu->language != language_c
+ && (last_die->tag == DW_TAG_class_type
+ || last_die->tag == DW_TAG_interface_type
+ || last_die->tag == DW_TAG_structure_type
+ || last_die->tag == DW_TAG_union_type))
+ || (cu->language == language_ada
+ && (last_die->tag == DW_TAG_subprogram
+ || last_die->tag == DW_TAG_lexical_block))))
+ {
+ nesting_level++;
+ parent_die = last_die;
+ continue;
+ }
- return address;
+ /* Otherwise we skip to the next sibling, if any. */
+ info_ptr = locate_pdi_sibling (last_die, buffer, info_ptr, abfd, cu);
- found:
- if (fn->seen_line)
- return address;
- if (address != fn->lowpc)
- complaint (&symfile_complaints,
- _("misplaced first line number at 0x%lx for '%s'"),
- (unsigned long) address, fn->name);
- fn->seen_line = 1;
- return fn->lowpc;
+ /* Back to the top, do it again. */
+ }
}
-/* Decode the Line Number Program (LNP) for the given line_header
- structure and CU. The actual information extracted and the type
- of structures created from the LNP depends on the value of PST.
+/* Read a minimal amount of information into the minimal die structure. */
- 1. If PST is NULL, then this procedure uses the data from the program
- to create all necessary symbol tables, and their linetables.
- The compilation directory of the file is passed in COMP_DIR,
- and must not be NULL.
+static gdb_byte *
+read_partial_die (struct partial_die_info *part_die,
+ struct abbrev_info *abbrev,
+ unsigned int abbrev_len, bfd *abfd,
+ gdb_byte *buffer, gdb_byte *info_ptr,
+ struct dwarf2_cu *cu)
+{
+ unsigned int i;
+ struct attribute attr;
+ int has_low_pc_attr = 0;
+ int has_high_pc_attr = 0;
- 2. If PST is not NULL, this procedure reads the program to determine
- the list of files included by the unit represented by PST, and
- builds all the associated partial symbol tables. In this case,
- the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
- is not used to compute the full name of the symtab, and therefore
- omitting it when building the partial symtab does not introduce
- the potential for inconsistency - a partial symtab and its associated
- symbtab having a different fullname -). */
+ memset (part_die, 0, sizeof (struct partial_die_info));
-static void
-dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd,
- struct dwarf2_cu *cu, struct partial_symtab *pst)
-{
- gdb_byte *line_ptr, *extended_end;
- gdb_byte *line_end;
- unsigned int bytes_read, extended_len;
- unsigned char op_code, extended_op, adj_opcode;
- CORE_ADDR baseaddr;
- struct objfile *objfile = cu->objfile;
- struct gdbarch *gdbarch = get_objfile_arch (objfile);
- const int decode_for_pst_p = (pst != NULL);
- struct subfile *last_subfile = NULL, *first_subfile = current_subfile;
+ part_die->offset = info_ptr - buffer;
- baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+ info_ptr += abbrev_len;
- line_ptr = lh->statement_program_start;
- line_end = lh->statement_program_end;
+ if (abbrev == NULL)
+ return info_ptr;
- /* Read the statement sequences until there's nothing left. */
- while (line_ptr < line_end)
- {
- /* state machine registers */
- CORE_ADDR address = 0;
- unsigned int file = 1;
- unsigned int line = 1;
- unsigned int column = 0;
- int is_stmt = lh->default_is_stmt;
- int basic_block = 0;
- int end_sequence = 0;
- CORE_ADDR addr;
- unsigned char op_index = 0;
+ part_die->tag = abbrev->tag;
+ part_die->has_children = abbrev->has_children;
- if (!decode_for_pst_p && lh->num_file_names >= file)
- {
- /* Start a subfile for the current file of the state machine. */
- /* lh->include_dirs and lh->file_names are 0-based, but the
- directory and file name numbers in the statement program
- are 1-based. */
- struct file_entry *fe = &lh->file_names[file - 1];
- char *dir = NULL;
-
- if (fe->dir_index)
- dir = lh->include_dirs[fe->dir_index - 1];
-
- dwarf2_start_subfile (fe->name, dir, comp_dir);
- }
+ for (i = 0; i < abbrev->num_attrs; ++i)
+ {
+ info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu);
- /* Decode the table. */
- while (!end_sequence)
+ /* Store the data if it is of an attribute we want to keep in a
+ partial symbol table. */
+ switch (attr.name)
{
- op_code = read_1_byte (abfd, line_ptr);
- line_ptr += 1;
- if (line_ptr > line_end)
+ case DW_AT_name:
+ switch (part_die->tag)
+ {
+ case DW_TAG_compile_unit:
+ case DW_TAG_type_unit:
+ /* Compilation units have a DW_AT_name that is a filename, not
+ a source language identifier. */
+ case DW_TAG_enumeration_type:
+ case DW_TAG_enumerator:
+ /* These tags always have simple identifiers already; no need
+ to canonicalize them. */
+ part_die->name = DW_STRING (&attr);
+ break;
+ default:
+ part_die->name
+ = dwarf2_canonicalize_name (DW_STRING (&attr), cu,
+ &cu->objfile->objfile_obstack);
+ break;
+ }
+ break;
+ case DW_AT_linkage_name:
+ case DW_AT_MIPS_linkage_name:
+ /* Note that both forms of linkage name might appear. We
+ assume they will be the same, and we only store the last
+ one we see. */
+ if (cu->language == language_ada)
+ part_die->name = DW_STRING (&attr);
+ part_die->linkage_name = DW_STRING (&attr);
+ break;
+ case DW_AT_low_pc:
+ has_low_pc_attr = 1;
+ part_die->lowpc = DW_ADDR (&attr);
+ break;
+ case DW_AT_high_pc:
+ has_high_pc_attr = 1;
+ part_die->highpc = DW_ADDR (&attr);
+ break;
+ case DW_AT_location:
+ /* Support the .debug_loc offsets. */
+ if (attr_form_is_block (&attr))
{
- dwarf2_debug_line_missing_end_sequence_complaint ();
- break;
+ part_die->locdesc = DW_BLOCK (&attr);
+ }
+ else if (attr_form_is_section_offset (&attr))
+ {
+ dwarf2_complex_location_expr_complaint ();
+ }
+ else
+ {
+ dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
+ "partial symbol information");
}
+ break;
+ case DW_AT_external:
+ part_die->is_external = DW_UNSND (&attr);
+ break;
+ case DW_AT_declaration:
+ part_die->is_declaration = DW_UNSND (&attr);
+ break;
+ case DW_AT_type:
+ part_die->has_type = 1;
+ break;
+ case DW_AT_abstract_origin:
+ case DW_AT_specification:
+ case DW_AT_extension:
+ part_die->has_specification = 1;
+ part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
+ break;
+ case DW_AT_sibling:
+ /* Ignore absolute siblings, they might point outside of
+ the current compile unit. */
+ if (attr.form == DW_FORM_ref_addr)
+ complaint (&symfile_complaints,
+ _("ignoring absolute DW_AT_sibling"));
+ else
+ part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr);
+ break;
+ case DW_AT_byte_size:
+ part_die->has_byte_size = 1;
+ break;
+ case DW_AT_calling_convention:
+ /* DWARF doesn't provide a way to identify a program's source-level
+ entry point. DW_AT_calling_convention attributes are only meant
+ to describe functions' calling conventions.
- if (op_code >= lh->opcode_base)
+ However, because it's a necessary piece of information in
+ Fortran, and because DW_CC_program is the only piece of debugging
+ information whose definition refers to a 'main program' at all,
+ several compilers have begun marking Fortran main programs with
+ DW_CC_program --- even when those functions use the standard
+ calling conventions.
+
+ So until DWARF specifies a way to provide this information and
+ compilers pick up the new representation, we'll support this
+ practice. */
+ if (DW_UNSND (&attr) == DW_CC_program
+ && cu->language == language_fortran)
{
- /* Special operand. */
- adj_opcode = op_code - lh->opcode_base;
- address += (((op_index + (adj_opcode / lh->line_range))
- / lh->maximum_ops_per_instruction)
- * lh->minimum_instruction_length);
- op_index = ((op_index + (adj_opcode / lh->line_range))
- % lh->maximum_ops_per_instruction);
- line += lh->line_base + (adj_opcode % lh->line_range);
- if (lh->num_file_names < file || file == 0)
- dwarf2_debug_line_missing_file_complaint ();
- /* For now we ignore lines not starting on an
- instruction boundary. */
- else if (op_index == 0)
- {
- lh->file_names[file - 1].included_p = 1;
- if (!decode_for_pst_p && is_stmt)
- {
- if (last_subfile != current_subfile)
- {
- addr = gdbarch_addr_bits_remove (gdbarch, address);
- if (last_subfile)
- record_line (last_subfile, 0, addr);
- last_subfile = current_subfile;
- }
- /* Append row to matrix using current values. */
- addr = check_cu_functions (address, cu);
- addr = gdbarch_addr_bits_remove (gdbarch, addr);
- record_line (current_subfile, line, addr);
- }
- }
- basic_block = 0;
+ set_main_name (part_die->name);
+
+ /* As this DIE has a static linkage the name would be difficult
+ to look up later. */
+ language_of_main = language_fortran;
}
- else switch (op_code)
- {
- case DW_LNS_extended_op:
- extended_len = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- extended_end = line_ptr + extended_len;
- extended_op = read_1_byte (abfd, line_ptr);
- line_ptr += 1;
- switch (extended_op)
- {
- case DW_LNE_end_sequence:
- end_sequence = 1;
- break;
- case DW_LNE_set_address:
- address = read_address (abfd, line_ptr, cu, &bytes_read);
- op_index = 0;
- line_ptr += bytes_read;
- address += baseaddr;
- break;
- case DW_LNE_define_file:
- {
- char *cur_file;
- unsigned int dir_index, mod_time, length;
+ break;
+ default:
+ break;
+ }
+ }
- cur_file = read_string (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- dir_index =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- mod_time =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- length =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- add_file_name (lh, cur_file, dir_index, mod_time, length);
- }
- break;
- case DW_LNE_set_discriminator:
- /* The discriminator is not interesting to the debugger;
- just ignore it. */
- line_ptr = extended_end;
- break;
- default:
- complaint (&symfile_complaints,
- _("mangled .debug_line section"));
- return;
- }
- /* Make sure that we parsed the extended op correctly. If e.g.
- we expected a different address size than the producer used,
- we may have read the wrong number of bytes. */
- if (line_ptr != extended_end)
- {
- complaint (&symfile_complaints,
- _("mangled .debug_line section"));
- return;
- }
- break;
- case DW_LNS_copy:
- if (lh->num_file_names < file || file == 0)
- dwarf2_debug_line_missing_file_complaint ();
- else
- {
- lh->file_names[file - 1].included_p = 1;
- if (!decode_for_pst_p && is_stmt)
- {
- if (last_subfile != current_subfile)
- {
- addr = gdbarch_addr_bits_remove (gdbarch, address);
- if (last_subfile)
- record_line (last_subfile, 0, addr);
- last_subfile = current_subfile;
- }
- addr = check_cu_functions (address, cu);
- addr = gdbarch_addr_bits_remove (gdbarch, addr);
- record_line (current_subfile, line, addr);
- }
- }
- basic_block = 0;
- break;
- case DW_LNS_advance_pc:
- {
- CORE_ADDR adjust
- = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ if (has_low_pc_attr && has_high_pc_attr)
+ {
+ /* When using the GNU linker, .gnu.linkonce. sections are used to
+ eliminate duplicate copies of functions and vtables and such.
+ The linker will arbitrarily choose one and discard the others.
+ The AT_*_pc values for such functions refer to local labels in
+ these sections. If the section from that file was discarded, the
+ labels are not in the output, so the relocs get a value of 0.
+ If this is a discarded function, mark the pc bounds as invalid,
+ so that GDB will ignore it. */
+ if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero)
+ {
+ struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
- address += (((op_index + adjust)
- / lh->maximum_ops_per_instruction)
- * lh->minimum_instruction_length);
- op_index = ((op_index + adjust)
- % lh->maximum_ops_per_instruction);
- line_ptr += bytes_read;
- }
- break;
- case DW_LNS_advance_line:
- line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- break;
- case DW_LNS_set_file:
- {
- /* The arrays lh->include_dirs and lh->file_names are
- 0-based, but the directory and file name numbers in
- the statement program are 1-based. */
- struct file_entry *fe;
- char *dir = NULL;
-
- file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- if (lh->num_file_names < file || file == 0)
- dwarf2_debug_line_missing_file_complaint ();
- else
- {
- fe = &lh->file_names[file - 1];
- if (fe->dir_index)
- dir = lh->include_dirs[fe->dir_index - 1];
- if (!decode_for_pst_p)
- {
- last_subfile = current_subfile;
- dwarf2_start_subfile (fe->name, dir, comp_dir);
- }
- }
- }
- break;
- case DW_LNS_set_column:
- column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- break;
- case DW_LNS_negate_stmt:
- is_stmt = (!is_stmt);
- break;
- case DW_LNS_set_basic_block:
- basic_block = 1;
- break;
- /* Add to the address register of the state machine the
- address increment value corresponding to special opcode
- 255. I.e., this value is scaled by the minimum
- instruction length since special opcode 255 would have
- scaled the the increment. */
- case DW_LNS_const_add_pc:
- {
- CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range;
-
- address += (((op_index + adjust)
- / lh->maximum_ops_per_instruction)
- * lh->minimum_instruction_length);
- op_index = ((op_index + adjust)
- % lh->maximum_ops_per_instruction);
- }
- break;
- case DW_LNS_fixed_advance_pc:
- address += read_2_bytes (abfd, line_ptr);
- op_index = 0;
- line_ptr += 2;
- break;
- default:
- {
- /* Unknown standard opcode, ignore it. */
- int i;
+ complaint (&symfile_complaints,
+ _("DW_AT_low_pc %s is zero "
+ "for DIE at 0x%x [in module %s]"),
+ paddress (gdbarch, part_die->lowpc),
+ part_die->offset, cu->objfile->name);
+ }
+ /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
+ else if (part_die->lowpc >= part_die->highpc)
+ {
+ struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
- for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
- {
- (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- }
- }
- }
+ complaint (&symfile_complaints,
+ _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
+ "for DIE at 0x%x [in module %s]"),
+ paddress (gdbarch, part_die->lowpc),
+ paddress (gdbarch, part_die->highpc),
+ part_die->offset, cu->objfile->name);
}
- if (lh->num_file_names < file || file == 0)
- dwarf2_debug_line_missing_file_complaint ();
else
- {
- lh->file_names[file - 1].included_p = 1;
- if (!decode_for_pst_p)
- {
- addr = gdbarch_addr_bits_remove (gdbarch, address);
- record_line (current_subfile, 0, addr);
- }
- }
+ part_die->has_pc_info = 1;
}
- if (decode_for_pst_p)
- {
- int file_index;
+ return info_ptr;
+}
- /* Now that we're done scanning the Line Header Program, we can
- create the psymtab of each included file. */
- for (file_index = 0; file_index < lh->num_file_names; file_index++)
- if (lh->file_names[file_index].included_p == 1)
- {
- const struct file_entry fe = lh->file_names [file_index];
- char *include_name = fe.name;
- char *dir_name = NULL;
- char *pst_filename = pst->filename;
+/* Find a cached partial DIE at OFFSET in CU. */
- if (fe.dir_index)
- dir_name = lh->include_dirs[fe.dir_index - 1];
+static struct partial_die_info *
+find_partial_die_in_comp_unit (unsigned int offset, struct dwarf2_cu *cu)
+{
+ struct partial_die_info *lookup_die = NULL;
+ struct partial_die_info part_die;
- if (!IS_ABSOLUTE_PATH (include_name) && dir_name != NULL)
- {
- include_name = concat (dir_name, SLASH_STRING,
- include_name, (char *)NULL);
- make_cleanup (xfree, include_name);
- }
+ part_die.offset = offset;
+ lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset);
- if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
- {
- pst_filename = concat (pst->dirname, SLASH_STRING,
- pst_filename, (char *)NULL);
- make_cleanup (xfree, pst_filename);
- }
+ return lookup_die;
+}
- if (strcmp (include_name, pst_filename) != 0)
- dwarf2_create_include_psymtab (include_name, pst, objfile);
- }
+/* Find a partial DIE at OFFSET, which may or may not be in CU,
+ except in the case of .debug_types DIEs which do not reference
+ outside their CU (they do however referencing other types via
+ DW_FORM_sig8). */
+
+static struct partial_die_info *
+find_partial_die (unsigned int offset, struct dwarf2_cu *cu)
+{
+ struct dwarf2_per_cu_data *per_cu = NULL;
+ struct partial_die_info *pd = NULL;
+
+ if (cu->per_cu->from_debug_types)
+ {
+ pd = find_partial_die_in_comp_unit (offset, cu);
+ if (pd != NULL)
+ return pd;
+ goto not_found;
}
- else
+
+ if (offset_in_cu_p (&cu->header, offset))
{
- /* Make sure a symtab is created for every file, even files
- which contain only variables (i.e. no code with associated
- line numbers). */
+ pd = find_partial_die_in_comp_unit (offset, cu);
+ if (pd != NULL)
+ return pd;
+ }
- int i;
- struct file_entry *fe;
+ per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
- for (i = 0; i < lh->num_file_names; i++)
- {
- char *dir = NULL;
+ if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL)
+ load_partial_comp_unit (per_cu, cu->objfile);
- fe = &lh->file_names[i];
- if (fe->dir_index)
- dir = lh->include_dirs[fe->dir_index - 1];
- dwarf2_start_subfile (fe->name, dir, comp_dir);
+ per_cu->cu->last_used = 0;
+ pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
- /* Skip the main file; we don't need it, and it must be
- allocated last, so that it will show up before the
- non-primary symtabs in the objfile's symtab list. */
- if (current_subfile == first_subfile)
- continue;
+ if (pd == NULL && per_cu->load_all_dies == 0)
+ {
+ struct cleanup *back_to;
+ struct partial_die_info comp_unit_die;
+ struct abbrev_info *abbrev;
+ unsigned int bytes_read;
+ char *info_ptr;
- if (current_subfile->symtab == NULL)
- current_subfile->symtab = allocate_symtab (current_subfile->name,
- cu->objfile);
- fe->symtab = current_subfile->symtab;
+ per_cu->load_all_dies = 1;
+
+ /* Re-read the DIEs. */
+ back_to = make_cleanup (null_cleanup, 0);
+ if (per_cu->cu->dwarf2_abbrevs == NULL)
+ {
+ dwarf2_read_abbrevs (per_cu->cu->objfile->obfd, per_cu->cu);
+ make_cleanup (dwarf2_free_abbrev_table, per_cu->cu);
}
- }
-}
+ info_ptr = (dwarf2_per_objfile->info.buffer
+ + per_cu->cu->header.offset
+ + per_cu->cu->header.first_die_offset);
+ abbrev = peek_die_abbrev (info_ptr, &bytes_read, per_cu->cu);
+ info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
+ per_cu->cu->objfile->obfd,
+ dwarf2_per_objfile->info.buffer, info_ptr,
+ per_cu->cu);
+ if (comp_unit_die.has_children)
+ load_partial_dies (per_cu->cu->objfile->obfd,
+ dwarf2_per_objfile->info.buffer, info_ptr,
+ 0, per_cu->cu);
+ do_cleanups (back_to);
-/* Start a subfile for DWARF. FILENAME is the name of the file and
- DIRNAME the name of the source directory which contains FILENAME
- or NULL if not known. COMP_DIR is the compilation directory for the
- linetable's compilation unit or NULL if not known.
- This routine tries to keep line numbers from identical absolute and
- relative file names in a common subfile.
+ pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
+ }
- Using the `list' example from the GDB testsuite, which resides in
- /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
- of /srcdir/list0.c yields the following debugging information for list0.c:
+ not_found:
- DW_AT_name: /srcdir/list0.c
- DW_AT_comp_dir: /compdir
- files.files[0].name: list0.h
- files.files[0].dir: /srcdir
- files.files[1].name: list0.c
- files.files[1].dir: /srcdir
+ if (pd == NULL)
+ internal_error (__FILE__, __LINE__,
+ _("could not find partial DIE 0x%x "
+ "in cache [from module %s]\n"),
+ offset, bfd_get_filename (cu->objfile->obfd));
+ return pd;
+}
- The line number information for list0.c has to end up in a single
- subfile, so that `break /srcdir/list0.c:1' works as expected.
- start_subfile will ensure that this happens provided that we pass the
- concatenation of files.files[1].dir and files.files[1].name as the
- subfile's name. */
+/* See if we can figure out if the class lives in a namespace. We do
+ this by looking for a member function; its demangled name will
+ contain namespace info, if there is any. */
static void
-dwarf2_start_subfile (char *filename, char *dirname, char *comp_dir)
+guess_partial_die_structure_name (struct partial_die_info *struct_pdi,
+ struct dwarf2_cu *cu)
{
- char *fullname;
+ /* NOTE: carlton/2003-10-07: Getting the info this way changes
+ what template types look like, because the demangler
+ frequently doesn't give the same name as the debug info. We
+ could fix this by only using the demangled name to get the
+ prefix (but see comment in read_structure_type). */
- /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
- `start_symtab' will always pass the contents of DW_AT_comp_dir as
- second argument to start_subfile. To be consistent, we do the
- same here. In order not to lose the line information directory,
- we concatenate it to the filename when it makes sense.
- Note that the Dwarf3 standard says (speaking of filenames in line
- information): ``The directory index is ignored for file names
- that represent full path names''. Thus ignoring dirname in the
- `else' branch below isn't an issue. */
+ struct partial_die_info *real_pdi;
+ struct partial_die_info *child_pdi;
- if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
- fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
- else
- fullname = filename;
+ /* If this DIE (this DIE's specification, if any) has a parent, then
+ we should not do this. We'll prepend the parent's fully qualified
+ name when we create the partial symbol. */
- start_subfile (fullname, comp_dir);
+ real_pdi = struct_pdi;
+ while (real_pdi->has_specification)
+ real_pdi = find_partial_die (real_pdi->spec_offset, cu);
- if (fullname != filename)
- xfree (fullname);
+ if (real_pdi->die_parent != NULL)
+ return;
+
+ for (child_pdi = struct_pdi->die_child;
+ child_pdi != NULL;
+ child_pdi = child_pdi->die_sibling)
+ {
+ if (child_pdi->tag == DW_TAG_subprogram
+ && child_pdi->linkage_name != NULL)
+ {
+ char *actual_class_name
+ = language_class_name_from_physname (cu->language_defn,
+ child_pdi->linkage_name);
+ if (actual_class_name != NULL)
+ {
+ struct_pdi->name
+ = obsavestring (actual_class_name,
+ strlen (actual_class_name),
+ &cu->objfile->objfile_obstack);
+ xfree (actual_class_name);
+ }
+ break;
+ }
+ }
}
+/* Adjust PART_DIE before generating a symbol for it. This function
+ may set the is_external flag or change the DIE's name. */
+
static void
-var_decode_location (struct attribute *attr, struct symbol *sym,
- struct dwarf2_cu *cu)
+fixup_partial_die (struct partial_die_info *part_die,
+ struct dwarf2_cu *cu)
{
- struct objfile *objfile = cu->objfile;
- struct comp_unit_head *cu_header = &cu->header;
+ /* Once we've fixed up a die, there's no point in doing so again.
+ This also avoids a memory leak if we were to call
+ guess_partial_die_structure_name multiple times. */
+ if (part_die->fixup_called)
+ return;
- /* NOTE drow/2003-01-30: There used to be a comment and some special
- code here to turn a symbol with DW_AT_external and a
- SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
- necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
- with some versions of binutils) where shared libraries could have
- relocations against symbols in their debug information - the
- minimal symbol would have the right address, but the debug info
- would not. It's no longer necessary, because we will explicitly
- apply relocations when we read in the debug information now. */
+ /* If we found a reference attribute and the DIE has no name, try
+ to find a name in the referred to DIE. */
- /* A DW_AT_location attribute with no contents indicates that a
- variable has been optimized away. */
- if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
+ if (part_die->name == NULL && part_die->has_specification)
{
- SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
- return;
- }
+ struct partial_die_info *spec_die;
- /* Handle one degenerate form of location expression specially, to
- preserve GDB's previous behavior when section offsets are
- specified. If this is just a DW_OP_addr then mark this symbol
- as LOC_STATIC. */
+ spec_die = find_partial_die (part_die->spec_offset, cu);
- if (attr_form_is_block (attr)
- && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
- && DW_BLOCK (attr)->data[0] == DW_OP_addr)
- {
- unsigned int dummy;
+ fixup_partial_die (spec_die, cu);
- SYMBOL_VALUE_ADDRESS (sym) =
- read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
- SYMBOL_CLASS (sym) = LOC_STATIC;
- fixup_symbol_section (sym, objfile);
- SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
- SYMBOL_SECTION (sym));
- return;
+ if (spec_die->name)
+ {
+ part_die->name = spec_die->name;
+
+ /* Copy DW_AT_external attribute if it is set. */
+ if (spec_die->is_external)
+ part_die->is_external = spec_die->is_external;
+ }
}
- /* NOTE drow/2002-01-30: It might be worthwhile to have a static
- expression evaluator, and use LOC_COMPUTED only when necessary
- (i.e. when the value of a register or memory location is
- referenced, or a thread-local block, etc.). Then again, it might
- not be worthwhile. I'm assuming that it isn't unless performance
- or memory numbers show me otherwise. */
+ /* Set default names for some unnamed DIEs. */
- dwarf2_symbol_mark_computed (attr, sym, cu);
- SYMBOL_CLASS (sym) = LOC_COMPUTED;
+ if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
+ part_die->name = "(anonymous namespace)";
+
+ /* If there is no parent die to provide a namespace, and there are
+ children, see if we can determine the namespace from their linkage
+ name.
+ NOTE: We need to do this even if cu->has_namespace_info != 0.
+ gcc-4.5 -gdwarf-4 can drop the enclosing namespace. */
+ if (cu->language == language_cplus
+ && dwarf2_per_objfile->types.asection != NULL
+ && part_die->die_parent == NULL
+ && part_die->has_children
+ && (part_die->tag == DW_TAG_class_type
+ || part_die->tag == DW_TAG_structure_type
+ || part_die->tag == DW_TAG_union_type))
+ guess_partial_die_structure_name (part_die, cu);
+
+ part_die->fixup_called = 1;
}
-/* Given a pointer to a DWARF information entry, figure out if we need
- to make a symbol table entry for it, and if so, create a new entry
- and return a pointer to it.
- If TYPE is NULL, determine symbol type from the die, otherwise
- used the passed type. */
+/* Read an attribute value described by an attribute form. */
-static struct symbol *
-new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
+static gdb_byte *
+read_attribute_value (struct attribute *attr, unsigned form,
+ bfd *abfd, gdb_byte *info_ptr,
+ struct dwarf2_cu *cu)
{
- struct objfile *objfile = cu->objfile;
- struct symbol *sym = NULL;
- char *name;
- struct attribute *attr = NULL;
- struct attribute *attr2 = NULL;
- CORE_ADDR baseaddr;
- int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
+ struct comp_unit_head *cu_header = &cu->header;
+ unsigned int bytes_read;
+ struct dwarf_block *blk;
- baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+ attr->form = form;
+ switch (form)
+ {
+ case DW_FORM_ref_addr:
+ if (cu->header.version == 2)
+ DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
+ else
+ DW_ADDR (attr) = read_offset (abfd, info_ptr,
+ &cu->header, &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_addr:
+ DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_block2:
+ blk = dwarf_alloc_block (cu);
+ blk->size = read_2_bytes (abfd, info_ptr);
+ info_ptr += 2;
+ blk->data = read_n_bytes (abfd, info_ptr, blk->size);
+ info_ptr += blk->size;
+ DW_BLOCK (attr) = blk;
+ break;
+ case DW_FORM_block4:
+ blk = dwarf_alloc_block (cu);
+ blk->size = read_4_bytes (abfd, info_ptr);
+ info_ptr += 4;
+ blk->data = read_n_bytes (abfd, info_ptr, blk->size);
+ info_ptr += blk->size;
+ DW_BLOCK (attr) = blk;
+ break;
+ case DW_FORM_data2:
+ DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
+ info_ptr += 2;
+ break;
+ case DW_FORM_data4:
+ DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
+ info_ptr += 4;
+ break;
+ case DW_FORM_data8:
+ DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
+ info_ptr += 8;
+ break;
+ case DW_FORM_sec_offset:
+ DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_string:
+ DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read);
+ DW_STRING_IS_CANONICAL (attr) = 0;
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_strp:
+ DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
+ &bytes_read);
+ DW_STRING_IS_CANONICAL (attr) = 0;
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_exprloc:
+ case DW_FORM_block:
+ blk = dwarf_alloc_block (cu);
+ blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ blk->data = read_n_bytes (abfd, info_ptr, blk->size);
+ info_ptr += blk->size;
+ DW_BLOCK (attr) = blk;
+ break;
+ case DW_FORM_block1:
+ blk = dwarf_alloc_block (cu);
+ blk->size = read_1_byte (abfd, info_ptr);
+ info_ptr += 1;
+ blk->data = read_n_bytes (abfd, info_ptr, blk->size);
+ info_ptr += blk->size;
+ DW_BLOCK (attr) = blk;
+ break;
+ case DW_FORM_data1:
+ DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
+ info_ptr += 1;
+ break;
+ case DW_FORM_flag:
+ DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
+ info_ptr += 1;
+ break;
+ case DW_FORM_flag_present:
+ DW_UNSND (attr) = 1;
+ break;
+ case DW_FORM_sdata:
+ DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_udata:
+ DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_ref1:
+ DW_ADDR (attr) = cu->header.offset + read_1_byte (abfd, info_ptr);
+ info_ptr += 1;
+ break;
+ case DW_FORM_ref2:
+ DW_ADDR (attr) = cu->header.offset + read_2_bytes (abfd, info_ptr);
+ info_ptr += 2;
+ break;
+ case DW_FORM_ref4:
+ DW_ADDR (attr) = cu->header.offset + read_4_bytes (abfd, info_ptr);
+ info_ptr += 4;
+ break;
+ case DW_FORM_ref8:
+ DW_ADDR (attr) = cu->header.offset + read_8_bytes (abfd, info_ptr);
+ info_ptr += 8;
+ break;
+ case DW_FORM_sig8:
+ /* Convert the signature to something we can record in DW_UNSND
+ for later lookup.
+ NOTE: This is NULL if the type wasn't found. */
+ DW_SIGNATURED_TYPE (attr) =
+ lookup_signatured_type (cu->objfile, read_8_bytes (abfd, info_ptr));
+ info_ptr += 8;
+ break;
+ case DW_FORM_ref_udata:
+ DW_ADDR (attr) = (cu->header.offset
+ + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_indirect:
+ form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu);
+ break;
+ default:
+ error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
+ dwarf_form_name (form),
+ bfd_get_filename (abfd));
+ }
- name = dwarf2_name (die, cu);
- if (name)
+ /* We have seen instances where the compiler tried to emit a byte
+ size attribute of -1 which ended up being encoded as an unsigned
+ 0xffffffff. Although 0xffffffff is technically a valid size value,
+ an object of this size seems pretty unlikely so we can relatively
+ safely treat these cases as if the size attribute was invalid and
+ treat them as zero by default. */
+ if (attr->name == DW_AT_byte_size
+ && form == DW_FORM_data4
+ && DW_UNSND (attr) >= 0xffffffff)
{
- const char *linkagename;
+ complaint
+ (&symfile_complaints,
+ _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
+ hex_string (DW_UNSND (attr)));
+ DW_UNSND (attr) = 0;
+ }
- sym = (struct symbol *) obstack_alloc (&objfile->objfile_obstack,
- sizeof (struct symbol));
- OBJSTAT (objfile, n_syms++);
- memset (sym, 0, sizeof (struct symbol));
+ return info_ptr;
+}
- /* Cache this symbol's name and the name's demangled form (if any). */
- SYMBOL_LANGUAGE (sym) = cu->language;
- linkagename = dwarf2_physname (name, die, cu);
- SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile);
+/* Read an attribute described by an abbreviated attribute. */
- /* Fortran does not have mangling standard and the mangling does differ
- between gfortran, iFort etc. */
- if (cu->language == language_fortran
- && sym->ginfo.language_specific.cplus_specific.demangled_name == NULL)
- sym->ginfo.language_specific.cplus_specific.demangled_name
- = (char *) dwarf2_full_name (name, die, cu);
+static gdb_byte *
+read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
+ bfd *abfd, gdb_byte *info_ptr, struct dwarf2_cu *cu)
+{
+ attr->name = abbrev->name;
+ return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu);
+}
- /* Default assumptions.
- Use the passed type or decode it from the die. */
- SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
- SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
- if (type != NULL)
- SYMBOL_TYPE (sym) = type;
- else
- SYMBOL_TYPE (sym) = die_type (die, cu);
- attr = dwarf2_attr (die,
- inlined_func ? DW_AT_call_line : DW_AT_decl_line,
- cu);
- if (attr)
- {
- SYMBOL_LINE (sym) = DW_UNSND (attr);
- }
+/* Read dwarf information from a buffer. */
- attr = dwarf2_attr (die,
- inlined_func ? DW_AT_call_file : DW_AT_decl_file,
- cu);
- if (attr)
- {
- int file_index = DW_UNSND (attr);
+static unsigned int
+read_1_byte (bfd *abfd, gdb_byte *buf)
+{
+ return bfd_get_8 (abfd, buf);
+}
- if (cu->line_header == NULL
- || file_index > cu->line_header->num_file_names)
- complaint (&symfile_complaints,
- _("file index out of range"));
- else if (file_index > 0)
- {
- struct file_entry *fe;
+static int
+read_1_signed_byte (bfd *abfd, gdb_byte *buf)
+{
+ return bfd_get_signed_8 (abfd, buf);
+}
- fe = &cu->line_header->file_names[file_index - 1];
- SYMBOL_SYMTAB (sym) = fe->symtab;
- }
- }
+static unsigned int
+read_2_bytes (bfd *abfd, gdb_byte *buf)
+{
+ return bfd_get_16 (abfd, buf);
+}
- switch (die->tag)
- {
- case DW_TAG_label:
- attr = dwarf2_attr (die, DW_AT_low_pc, cu);
- if (attr)
- {
- SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
- }
- SYMBOL_CLASS (sym) = LOC_LABEL;
- break;
- case DW_TAG_subprogram:
- /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
- finish_block. */
- SYMBOL_CLASS (sym) = LOC_BLOCK;
- attr2 = dwarf2_attr (die, DW_AT_external, cu);
- if ((attr2 && (DW_UNSND (attr2) != 0))
- || cu->language == language_ada)
- {
- /* Subprograms marked external are stored as a global symbol.
- Ada subprograms, whether marked external or not, are always
- stored as a global symbol, because we want to be able to
- access them globally. For instance, we want to be able
- to break on a nested subprogram without having to
- specify the context. */
- add_symbol_to_list (sym, &global_symbols);
- }
- else
- {
- add_symbol_to_list (sym, cu->list_in_scope);
- }
- break;
- case DW_TAG_inlined_subroutine:
- /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
- finish_block. */
- SYMBOL_CLASS (sym) = LOC_BLOCK;
- SYMBOL_INLINED (sym) = 1;
- /* Do not add the symbol to any lists. It will be found via
- BLOCK_FUNCTION from the blockvector. */
- break;
- case DW_TAG_variable:
- case DW_TAG_member:
- /* Compilation with minimal debug info may result in variables
- with missing type entries. Change the misleading `void' type
- to something sensible. */
- if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
- SYMBOL_TYPE (sym)
- = objfile_type (objfile)->nodebug_data_symbol;
+static int
+read_2_signed_bytes (bfd *abfd, gdb_byte *buf)
+{
+ return bfd_get_signed_16 (abfd, buf);
+}
- attr = dwarf2_attr (die, DW_AT_const_value, cu);
- /* In the case of DW_TAG_member, we should only be called for
- static const members. */
- if (die->tag == DW_TAG_member)
- {
- /* dwarf2_add_field uses die_is_declaration,
- so we do the same. */
- gdb_assert (die_is_declaration (die, cu));
- gdb_assert (attr);
- }
- if (attr)
- {
- dwarf2_const_value (attr, sym, cu);
- attr2 = dwarf2_attr (die, DW_AT_external, cu);
- if (attr2 && (DW_UNSND (attr2) != 0))
- add_symbol_to_list (sym, &global_symbols);
- else
- add_symbol_to_list (sym, cu->list_in_scope);
- break;
- }
- attr = dwarf2_attr (die, DW_AT_location, cu);
- if (attr)
- {
- var_decode_location (attr, sym, cu);
- attr2 = dwarf2_attr (die, DW_AT_external, cu);
- if (attr2 && (DW_UNSND (attr2) != 0))
- {
- struct pending **list_to_add;
+static unsigned int
+read_4_bytes (bfd *abfd, gdb_byte *buf)
+{
+ return bfd_get_32 (abfd, buf);
+}
- /* Workaround gfortran PR debug/40040 - it uses
- DW_AT_location for variables in -fPIC libraries which may
- get overriden by other libraries/executable and get
- a different address. Resolve it by the minimal symbol
- which may come from inferior's executable using copy
- relocation. Make this workaround only for gfortran as for
- other compilers GDB cannot guess the minimal symbol
- Fortran mangling kind. */
- if (cu->language == language_fortran && die->parent
- && die->parent->tag == DW_TAG_module
- && cu->producer
- && strncmp (cu->producer, "GNU Fortran ", 12) == 0)
- SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
+static int
+read_4_signed_bytes (bfd *abfd, gdb_byte *buf)
+{
+ return bfd_get_signed_32 (abfd, buf);
+}
- /* A variable with DW_AT_external is never static,
- but it may be block-scoped. */
- list_to_add = (cu->list_in_scope == &file_symbols
- ? &global_symbols : cu->list_in_scope);
- add_symbol_to_list (sym, list_to_add);
- }
- else
- add_symbol_to_list (sym, cu->list_in_scope);
- }
- else
- {
- /* We do not know the address of this symbol.
- If it is an external symbol and we have type information
- for it, enter the symbol as a LOC_UNRESOLVED symbol.
- The address of the variable will then be determined from
- the minimal symbol table whenever the variable is
- referenced. */
- attr2 = dwarf2_attr (die, DW_AT_external, cu);
- if (attr2 && (DW_UNSND (attr2) != 0)
- && dwarf2_attr (die, DW_AT_type, cu) != NULL)
- {
- struct pending **list_to_add;
+static ULONGEST
+read_8_bytes (bfd *abfd, gdb_byte *buf)
+{
+ return bfd_get_64 (abfd, buf);
+}
- /* A variable with DW_AT_external is never static, but it
- may be block-scoped. */
- list_to_add = (cu->list_in_scope == &file_symbols
- ? &global_symbols : cu->list_in_scope);
+static CORE_ADDR
+read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
+ unsigned int *bytes_read)
+{
+ struct comp_unit_head *cu_header = &cu->header;
+ CORE_ADDR retval = 0;
- SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
- add_symbol_to_list (sym, list_to_add);
- }
- else if (!die_is_declaration (die, cu))
- {
- /* Use the default LOC_OPTIMIZED_OUT class. */
- gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT);
- add_symbol_to_list (sym, cu->list_in_scope);
- }
- }
+ if (cu_header->signed_addr_p)
+ {
+ switch (cu_header->addr_size)
+ {
+ case 2:
+ retval = bfd_get_signed_16 (abfd, buf);
break;
- case DW_TAG_formal_parameter:
- /* If we are inside a function, mark this as an argument. If
- not, we might be looking at an argument to an inlined function
- when we do not have enough information to show inlined frames;
- pretend it's a local variable in that case so that the user can
- still see it. */
- if (context_stack_depth > 0
- && context_stack[context_stack_depth - 1].name != NULL)
- SYMBOL_IS_ARGUMENT (sym) = 1;
- attr = dwarf2_attr (die, DW_AT_location, cu);
- if (attr)
- {
- var_decode_location (attr, sym, cu);
- }
- attr = dwarf2_attr (die, DW_AT_const_value, cu);
- if (attr)
- {
- dwarf2_const_value (attr, sym, cu);
- }
- attr = dwarf2_attr (die, DW_AT_variable_parameter, cu);
- if (attr && DW_UNSND (attr))
- {
- struct type *ref_type;
-
- ref_type = lookup_reference_type (SYMBOL_TYPE (sym));
- SYMBOL_TYPE (sym) = ref_type;
- }
-
- add_symbol_to_list (sym, cu->list_in_scope);
+ case 4:
+ retval = bfd_get_signed_32 (abfd, buf);
break;
- case DW_TAG_unspecified_parameters:
- /* From varargs functions; gdb doesn't seem to have any
- interest in this information, so just ignore it for now.
- (FIXME?) */
+ case 8:
+ retval = bfd_get_signed_64 (abfd, buf);
break;
- case DW_TAG_class_type:
- case DW_TAG_interface_type:
- case DW_TAG_structure_type:
- case DW_TAG_union_type:
- case DW_TAG_set_type:
- case DW_TAG_enumeration_type:
- SYMBOL_CLASS (sym) = LOC_TYPEDEF;
- SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
+ default:
+ internal_error (__FILE__, __LINE__,
+ _("read_address: bad switch, signed [in module %s]"),
+ bfd_get_filename (abfd));
+ }
+ }
+ else
+ {
+ switch (cu_header->addr_size)
+ {
+ case 2:
+ retval = bfd_get_16 (abfd, buf);
+ break;
+ case 4:
+ retval = bfd_get_32 (abfd, buf);
+ break;
+ case 8:
+ retval = bfd_get_64 (abfd, buf);
+ break;
+ default:
+ internal_error (__FILE__, __LINE__,
+ _("read_address: bad switch, "
+ "unsigned [in module %s]"),
+ bfd_get_filename (abfd));
+ }
+ }
- {
- /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
- really ever be static objects: otherwise, if you try
- to, say, break of a class's method and you're in a file
- which doesn't mention that class, it won't work unless
- the check for all static symbols in lookup_symbol_aux
- saves you. See the OtherFileClass tests in
- gdb.c++/namespace.exp. */
+ *bytes_read = cu_header->addr_size;
+ return retval;
+}
- struct pending **list_to_add;
+/* Read the initial length from a section. The (draft) DWARF 3
+ specification allows the initial length to take up either 4 bytes
+ or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
+ bytes describe the length and all offsets will be 8 bytes in length
+ instead of 4.
- list_to_add = (cu->list_in_scope == &file_symbols
- && (cu->language == language_cplus
- || cu->language == language_java)
- ? &global_symbols : cu->list_in_scope);
-
- add_symbol_to_list (sym, list_to_add);
+ An older, non-standard 64-bit format is also handled by this
+ function. The older format in question stores the initial length
+ as an 8-byte quantity without an escape value. Lengths greater
+ than 2^32 aren't very common which means that the initial 4 bytes
+ is almost always zero. Since a length value of zero doesn't make
+ sense for the 32-bit format, this initial zero can be considered to
+ be an escape value which indicates the presence of the older 64-bit
+ format. As written, the code can't detect (old format) lengths
+ greater than 4GB. If it becomes necessary to handle lengths
+ somewhat larger than 4GB, we could allow other small values (such
+ as the non-sensical values of 1, 2, and 3) to also be used as
+ escape values indicating the presence of the old format.
- /* The semantics of C++ state that "struct foo { ... }" also
- defines a typedef for "foo". A Java class declaration also
- defines a typedef for the class. */
- if (cu->language == language_cplus
- || cu->language == language_java
- || cu->language == language_ada)
- {
- /* The symbol's name is already allocated along with
- this objfile, so we don't need to duplicate it for
- the type. */
- if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
- TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
- }
- }
- break;
- case DW_TAG_typedef:
- SYMBOL_CLASS (sym) = LOC_TYPEDEF;
- SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
- add_symbol_to_list (sym, cu->list_in_scope);
- break;
- case DW_TAG_base_type:
- case DW_TAG_subrange_type:
- case DW_TAG_const_type:
- case DW_TAG_volatile_type:
- SYMBOL_CLASS (sym) = LOC_TYPEDEF;
- SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
- add_symbol_to_list (sym, cu->list_in_scope);
- break;
- case DW_TAG_enumerator:
- attr = dwarf2_attr (die, DW_AT_const_value, cu);
- if (attr)
- {
- dwarf2_const_value (attr, sym, cu);
- }
- {
- /* NOTE: carlton/2003-11-10: See comment above in the
- DW_TAG_class_type, etc. block. */
+ The value returned via bytes_read should be used to increment the
+ relevant pointer after calling read_initial_length().
- struct pending **list_to_add;
+ [ Note: read_initial_length() and read_offset() are based on the
+ document entitled "DWARF Debugging Information Format", revision
+ 3, draft 8, dated November 19, 2001. This document was obtained
+ from:
- list_to_add = (cu->list_in_scope == &file_symbols
- && (cu->language == language_cplus
- || cu->language == language_java)
- ? &global_symbols : cu->list_in_scope);
+ http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
- add_symbol_to_list (sym, list_to_add);
- }
- break;
- case DW_TAG_namespace:
- SYMBOL_CLASS (sym) = LOC_TYPEDEF;
- add_symbol_to_list (sym, &global_symbols);
- break;
- default:
- /* Not a tag we recognize. Hopefully we aren't processing
- trash data, but since we must specifically ignore things
- we don't recognize, there is nothing else we should do at
- this point. */
- complaint (&symfile_complaints, _("unsupported tag: '%s'"),
- dwarf_tag_name (die->tag));
- break;
- }
+ This document is only a draft and is subject to change. (So beware.)
- /* For the benefit of old versions of GCC, check for anonymous
- namespaces based on the demangled name. */
- if (!processing_has_namespace_info
- && cu->language == language_cplus)
- cp_scan_for_anonymous_namespaces (sym);
- }
- return (sym);
-}
+ Details regarding the older, non-standard 64-bit format were
+ determined empirically by examining 64-bit ELF files produced by
+ the SGI toolchain on an IRIX 6.5 machine.
-/* Copy constant value from an attribute to a symbol. */
+ - Kevin, July 16, 2002
+ ] */
-static void
-dwarf2_const_value (struct attribute *attr, struct symbol *sym,
- struct dwarf2_cu *cu)
+static LONGEST
+read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read)
{
- struct objfile *objfile = cu->objfile;
- struct comp_unit_head *cu_header = &cu->header;
- enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ?
- BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
- struct dwarf_block *blk;
+ LONGEST length = bfd_get_32 (abfd, buf);
- switch (attr->form)
+ if (length == 0xffffffff)
{
- case DW_FORM_addr:
- {
- struct dwarf2_locexpr_baton *baton;
- gdb_byte *data;
-
- if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size)
- dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym),
- cu_header->addr_size,
- TYPE_LENGTH (SYMBOL_TYPE
- (sym)));
- /* Symbols of this form are reasonably rare, so we just
- piggyback on the existing location code rather than writing
- a new implementation of symbol_computed_ops. */
- baton = obstack_alloc (&objfile->objfile_obstack,
- sizeof (struct dwarf2_locexpr_baton));
- baton->per_cu = cu->per_cu;
- gdb_assert (baton->per_cu);
-
- baton->size = 2 + cu_header->addr_size;
- data = obstack_alloc (&objfile->objfile_obstack, baton->size);
- baton->data = data;
+ length = bfd_get_64 (abfd, buf + 4);
+ *bytes_read = 12;
+ }
+ else if (length == 0)
+ {
+ /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
+ length = bfd_get_64 (abfd, buf);
+ *bytes_read = 8;
+ }
+ else
+ {
+ *bytes_read = 4;
+ }
- data[0] = DW_OP_addr;
- store_unsigned_integer (&data[1], cu_header->addr_size,
- byte_order, DW_ADDR (attr));
- data[cu_header->addr_size + 1] = DW_OP_stack_value;
+ return length;
+}
- SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
- SYMBOL_LOCATION_BATON (sym) = baton;
- SYMBOL_CLASS (sym) = LOC_COMPUTED;
- }
- break;
- case DW_FORM_string:
- case DW_FORM_strp:
- /* DW_STRING is already allocated on the obstack, point directly
- to it. */
- SYMBOL_VALUE_BYTES (sym) = (gdb_byte *) DW_STRING (attr);
- SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
- break;
- case DW_FORM_block1:
- case DW_FORM_block2:
- case DW_FORM_block4:
- case DW_FORM_block:
- case DW_FORM_exprloc:
- blk = DW_BLOCK (attr);
- if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size)
- dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym),
- blk->size,
- TYPE_LENGTH (SYMBOL_TYPE
- (sym)));
- SYMBOL_VALUE_BYTES (sym) =
- obstack_alloc (&objfile->objfile_obstack, blk->size);
- memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size);
- SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
- break;
+/* Cover function for read_initial_length.
+ Returns the length of the object at BUF, and stores the size of the
+ initial length in *BYTES_READ and stores the size that offsets will be in
+ *OFFSET_SIZE.
+ If the initial length size is not equivalent to that specified in
+ CU_HEADER then issue a complaint.
+ This is useful when reading non-comp-unit headers. */
- /* The DW_AT_const_value attributes are supposed to carry the
- symbol's value "represented as it would be on the target
- architecture." By the time we get here, it's already been
- converted to host endianness, so we just need to sign- or
- zero-extend it as appropriate. */
- case DW_FORM_data1:
- dwarf2_const_value_data (attr, sym, 8);
- break;
- case DW_FORM_data2:
- dwarf2_const_value_data (attr, sym, 16);
- break;
- case DW_FORM_data4:
- dwarf2_const_value_data (attr, sym, 32);
- break;
- case DW_FORM_data8:
- dwarf2_const_value_data (attr, sym, 64);
- break;
+static LONGEST
+read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf,
+ const struct comp_unit_head *cu_header,
+ unsigned int *bytes_read,
+ unsigned int *offset_size)
+{
+ LONGEST length = read_initial_length (abfd, buf, bytes_read);
- case DW_FORM_sdata:
- SYMBOL_VALUE (sym) = DW_SND (attr);
- SYMBOL_CLASS (sym) = LOC_CONST;
- break;
+ gdb_assert (cu_header->initial_length_size == 4
+ || cu_header->initial_length_size == 8
+ || cu_header->initial_length_size == 12);
- case DW_FORM_udata:
- SYMBOL_VALUE (sym) = DW_UNSND (attr);
- SYMBOL_CLASS (sym) = LOC_CONST;
- break;
+ if (cu_header->initial_length_size != *bytes_read)
+ complaint (&symfile_complaints,
+ _("intermixed 32-bit and 64-bit DWARF sections"));
- default:
- complaint (&symfile_complaints,
- _("unsupported const value attribute form: '%s'"),
- dwarf_form_name (attr->form));
- SYMBOL_VALUE (sym) = 0;
- SYMBOL_CLASS (sym) = LOC_CONST;
- break;
- }
+ *offset_size = (*bytes_read == 4) ? 4 : 8;
+ return length;
}
+/* Read an offset from the data stream. The size of the offset is
+ given by cu_header->offset_size. */
-/* Given an attr with a DW_FORM_dataN value in host byte order, sign-
- or zero-extend it as appropriate for the symbol's type. */
-static void
-dwarf2_const_value_data (struct attribute *attr,
- struct symbol *sym,
- int bits)
+static LONGEST
+read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
+ unsigned int *bytes_read)
{
- LONGEST l = DW_UNSND (attr);
-
- if (bits < sizeof (l) * 8)
- {
- if (TYPE_UNSIGNED (SYMBOL_TYPE (sym)))
- l &= ((LONGEST) 1 << bits) - 1;
- else
- l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits);
- }
+ LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size);
- SYMBOL_VALUE (sym) = l;
- SYMBOL_CLASS (sym) = LOC_CONST;
+ *bytes_read = cu_header->offset_size;
+ return offset;
}
+/* Read an offset from the data stream. */
-/* Return the type of the die in question using its DW_AT_type attribute. */
-
-static struct type *
-die_type (struct die_info *die, struct dwarf2_cu *cu)
+static LONGEST
+read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size)
{
- struct attribute *type_attr;
- struct die_info *type_die;
+ LONGEST retval = 0;
- type_attr = dwarf2_attr (die, DW_AT_type, cu);
- if (!type_attr)
+ switch (offset_size)
{
- /* A missing DW_AT_type represents a void type. */
- return objfile_type (cu->objfile)->builtin_void;
+ case 4:
+ retval = bfd_get_32 (abfd, buf);
+ break;
+ case 8:
+ retval = bfd_get_64 (abfd, buf);
+ break;
+ default:
+ internal_error (__FILE__, __LINE__,
+ _("read_offset_1: bad switch [in module %s]"),
+ bfd_get_filename (abfd));
}
- type_die = follow_die_ref_or_sig (die, type_attr, &cu);
-
- return tag_type_to_type (type_die, cu);
+ return retval;
}
-/* True iff CU's producer generates GNAT Ada auxiliary information
- that allows to find parallel types through that information instead
- of having to do expensive parallel lookups by type name. */
-
-static int
-need_gnat_info (struct dwarf2_cu *cu)
+static gdb_byte *
+read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
{
- /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
- of GNAT produces this auxiliary information, without any indication
- that it is produced. Part of enhancing the FSF version of GNAT
- to produce that information will be to put in place an indicator
- that we can use in order to determine whether the descriptive type
- info is available or not. One suggestion that has been made is
- to use a new attribute, attached to the CU die. For now, assume
- that the descriptive type info is not available. */
- return 0;
+ /* If the size of a host char is 8 bits, we can return a pointer
+ to the buffer, otherwise we have to copy the data to a buffer
+ allocated on the temporary obstack. */
+ gdb_assert (HOST_CHAR_BIT == 8);
+ return buf;
}
-
-/* Return the auxiliary type of the die in question using its
- DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
- attribute is not present. */
-
-static struct type *
-die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu)
+static char *
+read_direct_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
{
- struct attribute *type_attr;
- struct die_info *type_die;
-
- type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu);
- if (!type_attr)
- return NULL;
-
- type_die = follow_die_ref (die, type_attr, &cu);
- return tag_type_to_type (type_die, cu);
+ /* If the size of a host char is 8 bits, we can return a pointer
+ to the string, otherwise we have to copy the string to a buffer
+ allocated on the temporary obstack. */
+ gdb_assert (HOST_CHAR_BIT == 8);
+ if (*buf == '\0')
+ {
+ *bytes_read_ptr = 1;
+ return NULL;
+ }
+ *bytes_read_ptr = strlen ((char *) buf) + 1;
+ return (char *) buf;
}
-/* If DIE has a descriptive_type attribute, then set the TYPE's
- descriptive type accordingly. */
-
-static void
-set_descriptive_type (struct type *type, struct die_info *die,
- struct dwarf2_cu *cu)
+static char *
+read_indirect_string (bfd *abfd, gdb_byte *buf,
+ const struct comp_unit_head *cu_header,
+ unsigned int *bytes_read_ptr)
{
- struct type *descriptive_type = die_descriptive_type (die, cu);
+ LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr);
- if (descriptive_type)
+ dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str);
+ if (dwarf2_per_objfile->str.buffer == NULL)
{
- ALLOCATE_GNAT_AUX_TYPE (type);
- TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type;
+ error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
+ bfd_get_filename (abfd));
+ return NULL;
+ }
+ if (str_offset >= dwarf2_per_objfile->str.size)
+ {
+ error (_("DW_FORM_strp pointing outside of "
+ ".debug_str section [in module %s]"),
+ bfd_get_filename (abfd));
+ return NULL;
}
+ gdb_assert (HOST_CHAR_BIT == 8);
+ if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
+ return NULL;
+ return (char *) (dwarf2_per_objfile->str.buffer + str_offset);
}
-/* Return the containing type of the die in question using its
- DW_AT_containing_type attribute. */
-
-static struct type *
-die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
+static unsigned long
+read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
{
- struct attribute *type_attr;
- struct die_info *type_die;
-
- type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
- if (!type_attr)
- error (_("Dwarf Error: Problem turning containing type into gdb type "
- "[in module %s]"), cu->objfile->name);
+ unsigned long result;
+ unsigned int num_read;
+ int i, shift;
+ unsigned char byte;
- type_die = follow_die_ref_or_sig (die, type_attr, &cu);
- return tag_type_to_type (type_die, cu);
+ result = 0;
+ shift = 0;
+ num_read = 0;
+ i = 0;
+ while (1)
+ {
+ byte = bfd_get_8 (abfd, buf);
+ buf++;
+ num_read++;
+ result |= ((unsigned long)(byte & 127) << shift);
+ if ((byte & 128) == 0)
+ {
+ break;
+ }
+ shift += 7;
+ }
+ *bytes_read_ptr = num_read;
+ return result;
}
-static struct type *
-tag_type_to_type (struct die_info *die, struct dwarf2_cu *cu)
+static long
+read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
{
- struct type *this_type;
+ long result;
+ int i, shift, num_read;
+ unsigned char byte;
- this_type = read_type_die (die, cu);
- if (!this_type)
+ result = 0;
+ shift = 0;
+ num_read = 0;
+ i = 0;
+ while (1)
{
- char *message, *saved;
-
- /* read_type_die already issued a complaint. */
- message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
- cu->objfile->name,
- cu->header.offset,
- die->offset);
- saved = obstack_copy0 (&cu->objfile->objfile_obstack,
- message, strlen (message));
- xfree (message);
-
- this_type = init_type (TYPE_CODE_ERROR, 0, 0, saved, cu->objfile);
+ byte = bfd_get_8 (abfd, buf);
+ buf++;
+ num_read++;
+ result |= ((long)(byte & 127) << shift);
+ shift += 7;
+ if ((byte & 128) == 0)
+ {
+ break;
+ }
}
- return this_type;
+ if ((shift < 8 * sizeof (result)) && (byte & 0x40))
+ result |= -(((long)1) << shift);
+ *bytes_read_ptr = num_read;
+ return result;
}
-static struct type *
-read_type_die (struct die_info *die, struct dwarf2_cu *cu)
+/* Return a pointer to just past the end of an LEB128 number in BUF. */
+
+static gdb_byte *
+skip_leb128 (bfd *abfd, gdb_byte *buf)
{
- struct type *this_type;
+ int byte;
- this_type = get_die_type (die, cu);
- if (this_type)
- return this_type;
+ while (1)
+ {
+ byte = bfd_get_8 (abfd, buf);
+ buf++;
+ if ((byte & 128) == 0)
+ return buf;
+ }
+}
- switch (die->tag)
+static void
+set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
+{
+ switch (lang)
{
- case DW_TAG_class_type:
- case DW_TAG_interface_type:
- case DW_TAG_structure_type:
- case DW_TAG_union_type:
- this_type = read_structure_type (die, cu);
- break;
- case DW_TAG_enumeration_type:
- this_type = read_enumeration_type (die, cu);
- break;
- case DW_TAG_subprogram:
- case DW_TAG_subroutine_type:
- case DW_TAG_inlined_subroutine:
- this_type = read_subroutine_type (die, cu);
- break;
- case DW_TAG_array_type:
- this_type = read_array_type (die, cu);
- break;
- case DW_TAG_set_type:
- this_type = read_set_type (die, cu);
- break;
- case DW_TAG_pointer_type:
- this_type = read_tag_pointer_type (die, cu);
- break;
- case DW_TAG_ptr_to_member_type:
- this_type = read_tag_ptr_to_member_type (die, cu);
- break;
- case DW_TAG_reference_type:
- this_type = read_tag_reference_type (die, cu);
+ case DW_LANG_C89:
+ case DW_LANG_C99:
+ case DW_LANG_C:
+ cu->language = language_c;
break;
- case DW_TAG_const_type:
- this_type = read_tag_const_type (die, cu);
+ case DW_LANG_C_plus_plus:
+ cu->language = language_cplus;
break;
- case DW_TAG_volatile_type:
- this_type = read_tag_volatile_type (die, cu);
+ case DW_LANG_D:
+ cu->language = language_d;
break;
- case DW_TAG_string_type:
- this_type = read_tag_string_type (die, cu);
+ case DW_LANG_Fortran77:
+ case DW_LANG_Fortran90:
+ case DW_LANG_Fortran95:
+ cu->language = language_fortran;
break;
- case DW_TAG_typedef:
- this_type = read_typedef (die, cu);
+ case DW_LANG_Mips_Assembler:
+ cu->language = language_asm;
break;
- case DW_TAG_subrange_type:
- this_type = read_subrange_type (die, cu);
+ case DW_LANG_Java:
+ cu->language = language_java;
break;
- case DW_TAG_base_type:
- this_type = read_base_type (die, cu);
+ case DW_LANG_Ada83:
+ case DW_LANG_Ada95:
+ cu->language = language_ada;
break;
- case DW_TAG_unspecified_type:
- this_type = read_unspecified_type (die, cu);
+ case DW_LANG_Modula2:
+ cu->language = language_m2;
break;
- case DW_TAG_namespace:
- this_type = read_namespace_type (die, cu);
+ case DW_LANG_Pascal83:
+ cu->language = language_pascal;
break;
- case DW_TAG_module:
- this_type = read_module_type (die, cu);
+ case DW_LANG_ObjC:
+ cu->language = language_objc;
break;
+ case DW_LANG_Cobol74:
+ case DW_LANG_Cobol85:
default:
- complaint (&symfile_complaints, _("unexpected tag in read_type_die: '%s'"),
- dwarf_tag_name (die->tag));
+ cu->language = language_minimal;
break;
}
-
- return this_type;
+ cu->language_defn = language_def (cu->language);
}
-/* Return the name of the namespace/class that DIE is defined within,
- or "" if we can't tell. The caller should not xfree the result.
+/* Return the named attribute or NULL if not there. */
- For example, if we're within the method foo() in the following
- code:
+static struct attribute *
+dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
+{
+ unsigned int i;
+ struct attribute *spec = NULL;
- namespace N {
- class C {
- void foo () {
- }
- };
- }
+ for (i = 0; i < die->num_attrs; ++i)
+ {
+ if (die->attrs[i].name == name)
+ return &die->attrs[i];
+ if (die->attrs[i].name == DW_AT_specification
+ || die->attrs[i].name == DW_AT_abstract_origin)
+ spec = &die->attrs[i];
+ }
- then determine_prefix on foo's die will return "N::C". */
+ if (spec)
+ {
+ die = follow_die_ref (die, spec, &cu);
+ return dwarf2_attr (die, name, cu);
+ }
-static char *
-determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
-{
- struct die_info *parent, *spec_die;
- struct dwarf2_cu *spec_cu;
- struct type *parent_type;
+ return NULL;
+}
- if (cu->language != language_cplus && cu->language != language_java
- && cu->language != language_fortran)
- return "";
+/* Return the named attribute or NULL if not there,
+ but do not follow DW_AT_specification, etc.
+ This is for use in contexts where we're reading .debug_types dies.
+ Following DW_AT_specification, DW_AT_abstract_origin will take us
+ back up the chain, and we want to go down. */
- /* We have to be careful in the presence of DW_AT_specification.
- For example, with GCC 3.4, given the code
+static struct attribute *
+dwarf2_attr_no_follow (struct die_info *die, unsigned int name,
+ struct dwarf2_cu *cu)
+{
+ unsigned int i;
- namespace N {
- void foo() {
- // Definition of N::foo.
- }
- }
+ for (i = 0; i < die->num_attrs; ++i)
+ if (die->attrs[i].name == name)
+ return &die->attrs[i];
- then we'll have a tree of DIEs like this:
+ return NULL;
+}
- 1: DW_TAG_compile_unit
- 2: DW_TAG_namespace // N
- 3: DW_TAG_subprogram // declaration of N::foo
- 4: DW_TAG_subprogram // definition of N::foo
- DW_AT_specification // refers to die #3
+/* Return non-zero iff the attribute NAME is defined for the given DIE,
+ and holds a non-zero value. This function should only be used for
+ DW_FORM_flag or DW_FORM_flag_present attributes. */
- Thus, when processing die #4, we have to pretend that we're in
- the context of its DW_AT_specification, namely the contex of die
- #3. */
- spec_cu = cu;
- spec_die = die_specification (die, &spec_cu);
- if (spec_die == NULL)
- parent = die->parent;
- else
- {
- parent = spec_die->parent;
- cu = spec_cu;
- }
+static int
+dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
+{
+ struct attribute *attr = dwarf2_attr (die, name, cu);
- if (parent == NULL)
- return "";
- else
- switch (parent->tag)
- {
- case DW_TAG_namespace:
- parent_type = read_type_die (parent, cu);
- /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
- DW_TAG_namespace DIEs with a name of "::" for the global namespace.
- Work around this problem here. */
- if (cu->language == language_cplus
- && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0)
- return "";
- /* We give a name to even anonymous namespaces. */
- return TYPE_TAG_NAME (parent_type);
- case DW_TAG_class_type:
- case DW_TAG_interface_type:
- case DW_TAG_structure_type:
- case DW_TAG_union_type:
- case DW_TAG_module:
- parent_type = read_type_die (parent, cu);
- if (TYPE_TAG_NAME (parent_type) != NULL)
- return TYPE_TAG_NAME (parent_type);
- else
- /* An anonymous structure is only allowed non-static data
- members; no typedefs, no member functions, et cetera.
- So it does not need a prefix. */
- return "";
- default:
- return determine_prefix (parent, cu);
- }
+ return (attr && DW_UNSND (attr));
}
-/* Return a newly-allocated string formed by concatenating PREFIX and
- SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
- simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
- perform an obconcat, otherwise allocate storage for the result. The CU argument
- is used to determine the language and hence, the appropriate separator. */
+static int
+die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
+{
+ /* A DIE is a declaration if it has a DW_AT_declaration attribute
+ which value is non-zero. However, we have to be careful with
+ DIEs having a DW_AT_specification attribute, because dwarf2_attr()
+ (via dwarf2_flag_true_p) follows this attribute. So we may
+ end up accidently finding a declaration attribute that belongs
+ to a different DIE referenced by the specification attribute,
+ even though the given DIE does not have a declaration attribute. */
+ return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
+ && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
+}
-#define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
+/* Return the die giving the specification for DIE, if there is
+ one. *SPEC_CU is the CU containing DIE on input, and the CU
+ containing the return value on output. If there is no
+ specification, but there is an abstract origin, that is
+ returned. */
-static char *
-typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
- int physname, struct dwarf2_cu *cu)
+static struct die_info *
+die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
{
- const char *lead = "";
- const char *sep;
+ struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
+ *spec_cu);
- if (suffix == NULL || suffix[0] == '\0' || prefix == NULL || prefix[0] == '\0')
- sep = "";
- else if (cu->language == language_java)
- sep = ".";
- else if (cu->language == language_fortran && physname)
- {
- /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
- DW_AT_MIPS_linkage_name is preferred and used instead. */
+ if (spec_attr == NULL)
+ spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu);
- lead = "__";
- sep = "_MOD_";
- }
+ if (spec_attr == NULL)
+ return NULL;
else
- sep = "::";
+ return follow_die_ref (die, spec_attr, spec_cu);
+}
- if (prefix == NULL)
- prefix = "";
- if (suffix == NULL)
- suffix = "";
+/* Free the line_header structure *LH, and any arrays and strings it
+ refers to.
+ NOTE: This is also used as a "cleanup" function. */
- if (obs == NULL)
- {
- char *retval = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
+static void
+free_line_header (struct line_header *lh)
+{
+ if (lh->standard_opcode_lengths)
+ xfree (lh->standard_opcode_lengths);
- strcpy (retval, lead);
- strcat (retval, prefix);
- strcat (retval, sep);
- strcat (retval, suffix);
- return retval;
- }
- else
- {
- /* We have an obstack. */
- return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL);
- }
-}
+ /* Remember that all the lh->file_names[i].name pointers are
+ pointers into debug_line_buffer, and don't need to be freed. */
+ if (lh->file_names)
+ xfree (lh->file_names);
-/* Return sibling of die, NULL if no sibling. */
+ /* Similarly for the include directory names. */
+ if (lh->include_dirs)
+ xfree (lh->include_dirs);
-static struct die_info *
-sibling_die (struct die_info *die)
-{
- return die->sibling;
+ xfree (lh);
}
-/* Get name of a die, return NULL if not found. */
+/* Add an entry to LH's include directory table. */
-static char *
-dwarf2_canonicalize_name (char *name, struct dwarf2_cu *cu,
- struct obstack *obstack)
+static void
+add_include_dir (struct line_header *lh, char *include_dir)
{
- if (name && cu->language == language_cplus)
+ /* Grow the array if necessary. */
+ if (lh->include_dirs_size == 0)
{
- char *canon_name = cp_canonicalize_string (name);
-
- if (canon_name != NULL)
- {
- if (strcmp (canon_name, name) != 0)
- name = obsavestring (canon_name, strlen (canon_name),
- obstack);
- xfree (canon_name);
- }
+ lh->include_dirs_size = 1; /* for testing */
+ lh->include_dirs = xmalloc (lh->include_dirs_size
+ * sizeof (*lh->include_dirs));
+ }
+ else if (lh->num_include_dirs >= lh->include_dirs_size)
+ {
+ lh->include_dirs_size *= 2;
+ lh->include_dirs = xrealloc (lh->include_dirs,
+ (lh->include_dirs_size
+ * sizeof (*lh->include_dirs)));
}
- return name;
+ lh->include_dirs[lh->num_include_dirs++] = include_dir;
}
-/* Get name of a die, return NULL if not found. */
+/* Add an entry to LH's file name table. */
-static char *
-dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
+static void
+add_file_name (struct line_header *lh,
+ char *name,
+ unsigned int dir_index,
+ unsigned int mod_time,
+ unsigned int length)
{
- struct attribute *attr;
-
- attr = dwarf2_attr (die, DW_AT_name, cu);
- if (!attr || !DW_STRING (attr))
- return NULL;
+ struct file_entry *fe;
- switch (die->tag)
+ /* Grow the array if necessary. */
+ if (lh->file_names_size == 0)
{
- case DW_TAG_compile_unit:
- /* Compilation units have a DW_AT_name that is a filename, not
- a source language identifier. */
- case DW_TAG_enumeration_type:
- case DW_TAG_enumerator:
- /* These tags always have simple identifiers already; no need
- to canonicalize them. */
- return DW_STRING (attr);
+ lh->file_names_size = 1; /* for testing */
+ lh->file_names = xmalloc (lh->file_names_size
+ * sizeof (*lh->file_names));
+ }
+ else if (lh->num_file_names >= lh->file_names_size)
+ {
+ lh->file_names_size *= 2;
+ lh->file_names = xrealloc (lh->file_names,
+ (lh->file_names_size
+ * sizeof (*lh->file_names)));
+ }
- case DW_TAG_subprogram:
- /* Java constructors will all be named "<init>", so return
- the class name when we see this special case. */
- if (cu->language == language_java
- && DW_STRING (attr) != NULL
- && strcmp (DW_STRING (attr), "<init>") == 0)
- {
- struct dwarf2_cu *spec_cu = cu;
- struct die_info *spec_die;
+ fe = &lh->file_names[lh->num_file_names++];
+ fe->name = name;
+ fe->dir_index = dir_index;
+ fe->mod_time = mod_time;
+ fe->length = length;
+ fe->included_p = 0;
+ fe->symtab = NULL;
+}
- /* GCJ will output '<init>' for Java constructor names.
- For this special case, return the name of the parent class. */
+/* Read the statement program header starting at OFFSET in
+ .debug_line, according to the endianness of ABFD. Return a pointer
+ to a struct line_header, allocated using xmalloc.
- /* GCJ may output suprogram DIEs with AT_specification set.
- If so, use the name of the specified DIE. */
- spec_die = die_specification (die, &spec_cu);
- if (spec_die != NULL)
- return dwarf2_name (spec_die, spec_cu);
+ NOTE: the strings in the include directory and file name tables of
+ the returned object point into debug_line_buffer, and must not be
+ freed. */
- do
- {
- die = die->parent;
- if (die->tag == DW_TAG_class_type)
- return dwarf2_name (die, cu);
- }
- while (die->tag != DW_TAG_compile_unit);
- }
- break;
+static struct line_header *
+dwarf_decode_line_header (unsigned int offset, bfd *abfd,
+ struct dwarf2_cu *cu)
+{
+ struct cleanup *back_to;
+ struct line_header *lh;
+ gdb_byte *line_ptr;
+ unsigned int bytes_read, offset_size;
+ int i;
+ char *cur_dir, *cur_file;
- case DW_TAG_class_type:
- case DW_TAG_interface_type:
- case DW_TAG_structure_type:
- case DW_TAG_union_type:
- /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
- structures or unions. These were of the form "._%d" in GCC 4.1,
- or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
- and GCC 4.4. We work around this problem by ignoring these. */
- if (strncmp (DW_STRING (attr), "._", 2) == 0
- || strncmp (DW_STRING (attr), "<anonymous", 10) == 0)
- return NULL;
- break;
+ dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->line);
+ if (dwarf2_per_objfile->line.buffer == NULL)
+ {
+ complaint (&symfile_complaints, _("missing .debug_line section"));
+ return 0;
+ }
- default:
- break;
+ /* Make sure that at least there's room for the total_length field.
+ That could be 12 bytes long, but we're just going to fudge that. */
+ if (offset + 4 >= dwarf2_per_objfile->line.size)
+ {
+ dwarf2_statement_list_fits_in_line_number_section_complaint ();
+ return 0;
}
- if (!DW_STRING_IS_CANONICAL (attr))
+ lh = xmalloc (sizeof (*lh));
+ memset (lh, 0, sizeof (*lh));
+ back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
+ (void *) lh);
+
+ line_ptr = dwarf2_per_objfile->line.buffer + offset;
+
+ /* Read in the header. */
+ lh->total_length =
+ read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header,
+ &bytes_read, &offset_size);
+ line_ptr += bytes_read;
+ if (line_ptr + lh->total_length > (dwarf2_per_objfile->line.buffer
+ + dwarf2_per_objfile->line.size))
{
- DW_STRING (attr)
- = dwarf2_canonicalize_name (DW_STRING (attr), cu,
- &cu->objfile->objfile_obstack);
- DW_STRING_IS_CANONICAL (attr) = 1;
+ dwarf2_statement_list_fits_in_line_number_section_complaint ();
+ return 0;
}
- return DW_STRING (attr);
+ lh->statement_program_end = line_ptr + lh->total_length;
+ lh->version = read_2_bytes (abfd, line_ptr);
+ line_ptr += 2;
+ lh->header_length = read_offset_1 (abfd, line_ptr, offset_size);
+ line_ptr += offset_size;
+ lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
+ line_ptr += 1;
+ if (lh->version >= 4)
+ {
+ lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr);
+ line_ptr += 1;
+ }
+ else
+ lh->maximum_ops_per_instruction = 1;
+
+ if (lh->maximum_ops_per_instruction == 0)
+ {
+ lh->maximum_ops_per_instruction = 1;
+ complaint (&symfile_complaints,
+ _("invalid maximum_ops_per_instruction "
+ "in `.debug_line' section"));
+ }
+
+ lh->default_is_stmt = read_1_byte (abfd, line_ptr);
+ line_ptr += 1;
+ lh->line_base = read_1_signed_byte (abfd, line_ptr);
+ line_ptr += 1;
+ lh->line_range = read_1_byte (abfd, line_ptr);
+ line_ptr += 1;
+ lh->opcode_base = read_1_byte (abfd, line_ptr);
+ line_ptr += 1;
+ lh->standard_opcode_lengths
+ = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
+
+ lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
+ for (i = 1; i < lh->opcode_base; ++i)
+ {
+ lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
+ line_ptr += 1;
+ }
+
+ /* Read directory table. */
+ while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL)
+ {
+ line_ptr += bytes_read;
+ add_include_dir (lh, cur_dir);
+ }
+ line_ptr += bytes_read;
+
+ /* Read file name table. */
+ while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL)
+ {
+ unsigned int dir_index, mod_time, length;
+
+ line_ptr += bytes_read;
+ dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+
+ add_file_name (lh, cur_file, dir_index, mod_time, length);
+ }
+ line_ptr += bytes_read;
+ lh->statement_program_start = line_ptr;
+
+ if (line_ptr > (dwarf2_per_objfile->line.buffer
+ + dwarf2_per_objfile->line.size))
+ complaint (&symfile_complaints,
+ _("line number info header doesn't "
+ "fit in `.debug_line' section"));
+
+ discard_cleanups (back_to);
+ return lh;
}
-/* Return the die that this die in an extension of, or NULL if there
- is none. *EXT_CU is the CU containing DIE on input, and the CU
- containing the return value on output. */
+/* This function exists to work around a bug in certain compilers
+ (particularly GCC 2.95), in which the first line number marker of a
+ function does not show up until after the prologue, right before
+ the second line number marker. This function shifts ADDRESS down
+ to the beginning of the function if necessary, and is called on
+ addresses passed to record_line. */
-static struct die_info *
-dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu)
+static CORE_ADDR
+check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu)
{
- struct attribute *attr;
+ struct function_range *fn;
- attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
- if (attr == NULL)
- return NULL;
+ /* Find the function_range containing address. */
+ if (!cu->first_fn)
+ return address;
- return follow_die_ref (die, attr, ext_cu);
+ if (!cu->cached_fn)
+ cu->cached_fn = cu->first_fn;
+
+ fn = cu->cached_fn;
+ while (fn)
+ if (fn->lowpc <= address && fn->highpc > address)
+ goto found;
+ else
+ fn = fn->next;
+
+ fn = cu->first_fn;
+ while (fn && fn != cu->cached_fn)
+ if (fn->lowpc <= address && fn->highpc > address)
+ goto found;
+ else
+ fn = fn->next;
+
+ return address;
+
+ found:
+ if (fn->seen_line)
+ return address;
+ if (address != fn->lowpc)
+ complaint (&symfile_complaints,
+ _("misplaced first line number at 0x%lx for '%s'"),
+ (unsigned long) address, fn->name);
+ fn->seen_line = 1;
+ return fn->lowpc;
}
-/* Convert a DIE tag into its string name. */
+/* Subroutine of dwarf_decode_lines to simplify it.
+ Return the file name of the psymtab for included file FILE_INDEX
+ in line header LH of PST.
+ COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
+ If space for the result is malloc'd, it will be freed by a cleanup.
+ Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
static char *
-dwarf_tag_name (unsigned tag)
+psymtab_include_file_name (const struct line_header *lh, int file_index,
+ const struct partial_symtab *pst,
+ const char *comp_dir)
+{
+ const struct file_entry fe = lh->file_names [file_index];
+ char *include_name = fe.name;
+ char *include_name_to_compare = include_name;
+ char *dir_name = NULL;
+ const char *pst_filename;
+ char *copied_name = NULL;
+ int file_is_pst;
+
+ if (fe.dir_index)
+ dir_name = lh->include_dirs[fe.dir_index - 1];
+
+ if (!IS_ABSOLUTE_PATH (include_name)
+ && (dir_name != NULL || comp_dir != NULL))
+ {
+ /* Avoid creating a duplicate psymtab for PST.
+ We do this by comparing INCLUDE_NAME and PST_FILENAME.
+ Before we do the comparison, however, we need to account
+ for DIR_NAME and COMP_DIR.
+ First prepend dir_name (if non-NULL). If we still don't
+ have an absolute path prepend comp_dir (if non-NULL).
+ However, the directory we record in the include-file's
+ psymtab does not contain COMP_DIR (to match the
+ corresponding symtab(s)).
+
+ Example:
+
+ bash$ cd /tmp
+ bash$ gcc -g ./hello.c
+ include_name = "hello.c"
+ dir_name = "."
+ DW_AT_comp_dir = comp_dir = "/tmp"
+ DW_AT_name = "./hello.c" */
+
+ if (dir_name != NULL)
+ {
+ include_name = concat (dir_name, SLASH_STRING,
+ include_name, (char *)NULL);
+ include_name_to_compare = include_name;
+ make_cleanup (xfree, include_name);
+ }
+ if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL)
+ {
+ include_name_to_compare = concat (comp_dir, SLASH_STRING,
+ include_name, (char *)NULL);
+ }
+ }
+
+ pst_filename = pst->filename;
+ if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
+ {
+ copied_name = concat (pst->dirname, SLASH_STRING,
+ pst_filename, (char *)NULL);
+ pst_filename = copied_name;
+ }
+
+ file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0;
+
+ if (include_name_to_compare != include_name)
+ xfree (include_name_to_compare);
+ if (copied_name != NULL)
+ xfree (copied_name);
+
+ if (file_is_pst)
+ return NULL;
+ return include_name;
+}
+
+/* Decode the Line Number Program (LNP) for the given line_header
+ structure and CU. The actual information extracted and the type
+ of structures created from the LNP depends on the value of PST.
+
+ 1. If PST is NULL, then this procedure uses the data from the program
+ to create all necessary symbol tables, and their linetables.
+
+ 2. If PST is not NULL, this procedure reads the program to determine
+ the list of files included by the unit represented by PST, and
+ builds all the associated partial symbol tables.
+
+ COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
+ It is used for relative paths in the line table.
+ NOTE: When processing partial symtabs (pst != NULL),
+ comp_dir == pst->dirname.
+
+ NOTE: It is important that psymtabs have the same file name (via strcmp)
+ as the corresponding symtab. Since COMP_DIR is not used in the name of the
+ symtab we don't use it in the name of the psymtabs we create.
+ E.g. expand_line_sal requires this when finding psymtabs to expand.
+ A good testcase for this is mb-inline.exp. */
+
+static void
+dwarf_decode_lines (struct line_header *lh, const char *comp_dir, bfd *abfd,
+ struct dwarf2_cu *cu, struct partial_symtab *pst)
{
- switch (tag)
+ gdb_byte *line_ptr, *extended_end;
+ gdb_byte *line_end;
+ unsigned int bytes_read, extended_len;
+ unsigned char op_code, extended_op, adj_opcode;
+ CORE_ADDR baseaddr;
+ struct objfile *objfile = cu->objfile;
+ struct gdbarch *gdbarch = get_objfile_arch (objfile);
+ const int decode_for_pst_p = (pst != NULL);
+ struct subfile *last_subfile = NULL, *first_subfile = current_subfile;
+
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+
+ line_ptr = lh->statement_program_start;
+ line_end = lh->statement_program_end;
+
+ /* Read the statement sequences until there's nothing left. */
+ while (line_ptr < line_end)
{
- case DW_TAG_padding:
- return "DW_TAG_padding";
- case DW_TAG_array_type:
- return "DW_TAG_array_type";
- case DW_TAG_class_type:
- return "DW_TAG_class_type";
- case DW_TAG_entry_point:
- return "DW_TAG_entry_point";
- case DW_TAG_enumeration_type:
- return "DW_TAG_enumeration_type";
- case DW_TAG_formal_parameter:
- return "DW_TAG_formal_parameter";
- case DW_TAG_imported_declaration:
- return "DW_TAG_imported_declaration";
- case DW_TAG_label:
- return "DW_TAG_label";
- case DW_TAG_lexical_block:
- return "DW_TAG_lexical_block";
- case DW_TAG_member:
- return "DW_TAG_member";
- case DW_TAG_pointer_type:
- return "DW_TAG_pointer_type";
- case DW_TAG_reference_type:
- return "DW_TAG_reference_type";
- case DW_TAG_compile_unit:
- return "DW_TAG_compile_unit";
- case DW_TAG_string_type:
- return "DW_TAG_string_type";
- case DW_TAG_structure_type:
- return "DW_TAG_structure_type";
- case DW_TAG_subroutine_type:
- return "DW_TAG_subroutine_type";
- case DW_TAG_typedef:
- return "DW_TAG_typedef";
- case DW_TAG_union_type:
- return "DW_TAG_union_type";
- case DW_TAG_unspecified_parameters:
- return "DW_TAG_unspecified_parameters";
- case DW_TAG_variant:
- return "DW_TAG_variant";
- case DW_TAG_common_block:
- return "DW_TAG_common_block";
- case DW_TAG_common_inclusion:
- return "DW_TAG_common_inclusion";
- case DW_TAG_inheritance:
- return "DW_TAG_inheritance";
- case DW_TAG_inlined_subroutine:
- return "DW_TAG_inlined_subroutine";
- case DW_TAG_module:
- return "DW_TAG_module";
- case DW_TAG_ptr_to_member_type:
- return "DW_TAG_ptr_to_member_type";
- case DW_TAG_set_type:
- return "DW_TAG_set_type";
- case DW_TAG_subrange_type:
- return "DW_TAG_subrange_type";
- case DW_TAG_with_stmt:
- return "DW_TAG_with_stmt";
- case DW_TAG_access_declaration:
- return "DW_TAG_access_declaration";
- case DW_TAG_base_type:
- return "DW_TAG_base_type";
- case DW_TAG_catch_block:
- return "DW_TAG_catch_block";
- case DW_TAG_const_type:
- return "DW_TAG_const_type";
- case DW_TAG_constant:
- return "DW_TAG_constant";
- case DW_TAG_enumerator:
- return "DW_TAG_enumerator";
- case DW_TAG_file_type:
- return "DW_TAG_file_type";
- case DW_TAG_friend:
- return "DW_TAG_friend";
- case DW_TAG_namelist:
- return "DW_TAG_namelist";
- case DW_TAG_namelist_item:
- return "DW_TAG_namelist_item";
- case DW_TAG_packed_type:
- return "DW_TAG_packed_type";
- case DW_TAG_subprogram:
- return "DW_TAG_subprogram";
- case DW_TAG_template_type_param:
- return "DW_TAG_template_type_param";
- case DW_TAG_template_value_param:
- return "DW_TAG_template_value_param";
- case DW_TAG_thrown_type:
- return "DW_TAG_thrown_type";
- case DW_TAG_try_block:
- return "DW_TAG_try_block";
- case DW_TAG_variant_part:
- return "DW_TAG_variant_part";
- case DW_TAG_variable:
- return "DW_TAG_variable";
- case DW_TAG_volatile_type:
- return "DW_TAG_volatile_type";
- case DW_TAG_dwarf_procedure:
- return "DW_TAG_dwarf_procedure";
- case DW_TAG_restrict_type:
- return "DW_TAG_restrict_type";
- case DW_TAG_interface_type:
- return "DW_TAG_interface_type";
- case DW_TAG_namespace:
- return "DW_TAG_namespace";
- case DW_TAG_imported_module:
- return "DW_TAG_imported_module";
- case DW_TAG_unspecified_type:
- return "DW_TAG_unspecified_type";
- case DW_TAG_partial_unit:
- return "DW_TAG_partial_unit";
- case DW_TAG_imported_unit:
- return "DW_TAG_imported_unit";
- case DW_TAG_condition:
- return "DW_TAG_condition";
- case DW_TAG_shared_type:
- return "DW_TAG_shared_type";
- case DW_TAG_type_unit:
- return "DW_TAG_type_unit";
- case DW_TAG_MIPS_loop:
- return "DW_TAG_MIPS_loop";
- case DW_TAG_HP_array_descriptor:
- return "DW_TAG_HP_array_descriptor";
- case DW_TAG_format_label:
- return "DW_TAG_format_label";
- case DW_TAG_function_template:
- return "DW_TAG_function_template";
- case DW_TAG_class_template:
- return "DW_TAG_class_template";
- case DW_TAG_GNU_BINCL:
- return "DW_TAG_GNU_BINCL";
- case DW_TAG_GNU_EINCL:
- return "DW_TAG_GNU_EINCL";
- case DW_TAG_upc_shared_type:
- return "DW_TAG_upc_shared_type";
- case DW_TAG_upc_strict_type:
- return "DW_TAG_upc_strict_type";
- case DW_TAG_upc_relaxed_type:
- return "DW_TAG_upc_relaxed_type";
- case DW_TAG_PGI_kanji_type:
- return "DW_TAG_PGI_kanji_type";
- case DW_TAG_PGI_interface_block:
- return "DW_TAG_PGI_interface_block";
- default:
- return "DW_TAG_<unknown>";
- }
-}
+ /* state machine registers */
+ CORE_ADDR address = 0;
+ unsigned int file = 1;
+ unsigned int line = 1;
+ unsigned int column = 0;
+ int is_stmt = lh->default_is_stmt;
+ int basic_block = 0;
+ int end_sequence = 0;
+ CORE_ADDR addr;
+ unsigned char op_index = 0;
-/* Convert a DWARF attribute code into its string name. */
+ if (!decode_for_pst_p && lh->num_file_names >= file)
+ {
+ /* Start a subfile for the current file of the state machine. */
+ /* lh->include_dirs and lh->file_names are 0-based, but the
+ directory and file name numbers in the statement program
+ are 1-based. */
+ struct file_entry *fe = &lh->file_names[file - 1];
+ char *dir = NULL;
-static char *
-dwarf_attr_name (unsigned attr)
-{
- switch (attr)
- {
- case DW_AT_sibling:
- return "DW_AT_sibling";
- case DW_AT_location:
- return "DW_AT_location";
- case DW_AT_name:
- return "DW_AT_name";
- case DW_AT_ordering:
- return "DW_AT_ordering";
- case DW_AT_subscr_data:
- return "DW_AT_subscr_data";
- case DW_AT_byte_size:
- return "DW_AT_byte_size";
- case DW_AT_bit_offset:
- return "DW_AT_bit_offset";
- case DW_AT_bit_size:
- return "DW_AT_bit_size";
- case DW_AT_element_list:
- return "DW_AT_element_list";
- case DW_AT_stmt_list:
- return "DW_AT_stmt_list";
- case DW_AT_low_pc:
- return "DW_AT_low_pc";
- case DW_AT_high_pc:
- return "DW_AT_high_pc";
- case DW_AT_language:
- return "DW_AT_language";
- case DW_AT_member:
- return "DW_AT_member";
- case DW_AT_discr:
- return "DW_AT_discr";
- case DW_AT_discr_value:
- return "DW_AT_discr_value";
- case DW_AT_visibility:
- return "DW_AT_visibility";
- case DW_AT_import:
- return "DW_AT_import";
- case DW_AT_string_length:
- return "DW_AT_string_length";
- case DW_AT_common_reference:
- return "DW_AT_common_reference";
- case DW_AT_comp_dir:
- return "DW_AT_comp_dir";
- case DW_AT_const_value:
- return "DW_AT_const_value";
- case DW_AT_containing_type:
- return "DW_AT_containing_type";
- case DW_AT_default_value:
- return "DW_AT_default_value";
- case DW_AT_inline:
- return "DW_AT_inline";
- case DW_AT_is_optional:
- return "DW_AT_is_optional";
- case DW_AT_lower_bound:
- return "DW_AT_lower_bound";
- case DW_AT_producer:
- return "DW_AT_producer";
- case DW_AT_prototyped:
- return "DW_AT_prototyped";
- case DW_AT_return_addr:
- return "DW_AT_return_addr";
- case DW_AT_start_scope:
- return "DW_AT_start_scope";
- case DW_AT_bit_stride:
- return "DW_AT_bit_stride";
- case DW_AT_upper_bound:
- return "DW_AT_upper_bound";
- case DW_AT_abstract_origin:
- return "DW_AT_abstract_origin";
- case DW_AT_accessibility:
- return "DW_AT_accessibility";
- case DW_AT_address_class:
- return "DW_AT_address_class";
- case DW_AT_artificial:
- return "DW_AT_artificial";
- case DW_AT_base_types:
- return "DW_AT_base_types";
- case DW_AT_calling_convention:
- return "DW_AT_calling_convention";
- case DW_AT_count:
- return "DW_AT_count";
- case DW_AT_data_member_location:
- return "DW_AT_data_member_location";
- case DW_AT_decl_column:
- return "DW_AT_decl_column";
- case DW_AT_decl_file:
- return "DW_AT_decl_file";
- case DW_AT_decl_line:
- return "DW_AT_decl_line";
- case DW_AT_declaration:
- return "DW_AT_declaration";
- case DW_AT_discr_list:
- return "DW_AT_discr_list";
- case DW_AT_encoding:
- return "DW_AT_encoding";
- case DW_AT_external:
- return "DW_AT_external";
- case DW_AT_frame_base:
- return "DW_AT_frame_base";
- case DW_AT_friend:
- return "DW_AT_friend";
- case DW_AT_identifier_case:
- return "DW_AT_identifier_case";
- case DW_AT_macro_info:
- return "DW_AT_macro_info";
- case DW_AT_namelist_items:
- return "DW_AT_namelist_items";
- case DW_AT_priority:
- return "DW_AT_priority";
- case DW_AT_segment:
- return "DW_AT_segment";
- case DW_AT_specification:
- return "DW_AT_specification";
- case DW_AT_static_link:
- return "DW_AT_static_link";
- case DW_AT_type:
- return "DW_AT_type";
- case DW_AT_use_location:
- return "DW_AT_use_location";
- case DW_AT_variable_parameter:
- return "DW_AT_variable_parameter";
- case DW_AT_virtuality:
- return "DW_AT_virtuality";
- case DW_AT_vtable_elem_location:
- return "DW_AT_vtable_elem_location";
- /* DWARF 3 values. */
- case DW_AT_allocated:
- return "DW_AT_allocated";
- case DW_AT_associated:
- return "DW_AT_associated";
- case DW_AT_data_location:
- return "DW_AT_data_location";
- case DW_AT_byte_stride:
- return "DW_AT_byte_stride";
- case DW_AT_entry_pc:
- return "DW_AT_entry_pc";
- case DW_AT_use_UTF8:
- return "DW_AT_use_UTF8";
- case DW_AT_extension:
- return "DW_AT_extension";
- case DW_AT_ranges:
- return "DW_AT_ranges";
- case DW_AT_trampoline:
- return "DW_AT_trampoline";
- case DW_AT_call_column:
- return "DW_AT_call_column";
- case DW_AT_call_file:
- return "DW_AT_call_file";
- case DW_AT_call_line:
- return "DW_AT_call_line";
- case DW_AT_description:
- return "DW_AT_description";
- case DW_AT_binary_scale:
- return "DW_AT_binary_scale";
- case DW_AT_decimal_scale:
- return "DW_AT_decimal_scale";
- case DW_AT_small:
- return "DW_AT_small";
- case DW_AT_decimal_sign:
- return "DW_AT_decimal_sign";
- case DW_AT_digit_count:
- return "DW_AT_digit_count";
- case DW_AT_picture_string:
- return "DW_AT_picture_string";
- case DW_AT_mutable:
- return "DW_AT_mutable";
- case DW_AT_threads_scaled:
- return "DW_AT_threads_scaled";
- case DW_AT_explicit:
- return "DW_AT_explicit";
- case DW_AT_object_pointer:
- return "DW_AT_object_pointer";
- case DW_AT_endianity:
- return "DW_AT_endianity";
- case DW_AT_elemental:
- return "DW_AT_elemental";
- case DW_AT_pure:
- return "DW_AT_pure";
- case DW_AT_recursive:
- return "DW_AT_recursive";
- /* DWARF 4 values. */
- case DW_AT_signature:
- return "DW_AT_signature";
- case DW_AT_linkage_name:
- return "DW_AT_linkage_name";
- /* SGI/MIPS extensions. */
-#ifdef MIPS /* collides with DW_AT_HP_block_index */
- case DW_AT_MIPS_fde:
- return "DW_AT_MIPS_fde";
-#endif
- case DW_AT_MIPS_loop_begin:
- return "DW_AT_MIPS_loop_begin";
- case DW_AT_MIPS_tail_loop_begin:
- return "DW_AT_MIPS_tail_loop_begin";
- case DW_AT_MIPS_epilog_begin:
- return "DW_AT_MIPS_epilog_begin";
- case DW_AT_MIPS_loop_unroll_factor:
- return "DW_AT_MIPS_loop_unroll_factor";
- case DW_AT_MIPS_software_pipeline_depth:
- return "DW_AT_MIPS_software_pipeline_depth";
- case DW_AT_MIPS_linkage_name:
- return "DW_AT_MIPS_linkage_name";
- case DW_AT_MIPS_stride:
- return "DW_AT_MIPS_stride";
- case DW_AT_MIPS_abstract_name:
- return "DW_AT_MIPS_abstract_name";
- case DW_AT_MIPS_clone_origin:
- return "DW_AT_MIPS_clone_origin";
- case DW_AT_MIPS_has_inlines:
- return "DW_AT_MIPS_has_inlines";
- /* HP extensions. */
-#ifndef MIPS /* collides with DW_AT_MIPS_fde */
- case DW_AT_HP_block_index:
- return "DW_AT_HP_block_index";
-#endif
- case DW_AT_HP_unmodifiable:
- return "DW_AT_HP_unmodifiable";
- case DW_AT_HP_actuals_stmt_list:
- return "DW_AT_HP_actuals_stmt_list";
- case DW_AT_HP_proc_per_section:
- return "DW_AT_HP_proc_per_section";
- case DW_AT_HP_raw_data_ptr:
- return "DW_AT_HP_raw_data_ptr";
- case DW_AT_HP_pass_by_reference:
- return "DW_AT_HP_pass_by_reference";
- case DW_AT_HP_opt_level:
- return "DW_AT_HP_opt_level";
- case DW_AT_HP_prof_version_id:
- return "DW_AT_HP_prof_version_id";
- case DW_AT_HP_opt_flags:
- return "DW_AT_HP_opt_flags";
- case DW_AT_HP_cold_region_low_pc:
- return "DW_AT_HP_cold_region_low_pc";
- case DW_AT_HP_cold_region_high_pc:
- return "DW_AT_HP_cold_region_high_pc";
- case DW_AT_HP_all_variables_modifiable:
- return "DW_AT_HP_all_variables_modifiable";
- case DW_AT_HP_linkage_name:
- return "DW_AT_HP_linkage_name";
- case DW_AT_HP_prof_flags:
- return "DW_AT_HP_prof_flags";
- /* GNU extensions. */
- case DW_AT_sf_names:
- return "DW_AT_sf_names";
- case DW_AT_src_info:
- return "DW_AT_src_info";
- case DW_AT_mac_info:
- return "DW_AT_mac_info";
- case DW_AT_src_coords:
- return "DW_AT_src_coords";
- case DW_AT_body_begin:
- return "DW_AT_body_begin";
- case DW_AT_body_end:
- return "DW_AT_body_end";
- case DW_AT_GNU_vector:
- return "DW_AT_GNU_vector";
- /* VMS extensions. */
- case DW_AT_VMS_rtnbeg_pd_address:
- return "DW_AT_VMS_rtnbeg_pd_address";
- /* UPC extension. */
- case DW_AT_upc_threads_scaled:
- return "DW_AT_upc_threads_scaled";
- /* PGI (STMicroelectronics) extensions. */
- case DW_AT_PGI_lbase:
- return "DW_AT_PGI_lbase";
- case DW_AT_PGI_soffset:
- return "DW_AT_PGI_soffset";
- case DW_AT_PGI_lstride:
- return "DW_AT_PGI_lstride";
- default:
- return "DW_AT_<unknown>";
- }
-}
-
-/* Convert a DWARF value form code into its string name. */
+ if (fe->dir_index)
+ dir = lh->include_dirs[fe->dir_index - 1];
-static char *
-dwarf_form_name (unsigned form)
-{
- switch (form)
- {
- case DW_FORM_addr:
- return "DW_FORM_addr";
- case DW_FORM_block2:
- return "DW_FORM_block2";
- case DW_FORM_block4:
- return "DW_FORM_block4";
- case DW_FORM_data2:
- return "DW_FORM_data2";
- case DW_FORM_data4:
- return "DW_FORM_data4";
- case DW_FORM_data8:
- return "DW_FORM_data8";
- case DW_FORM_string:
- return "DW_FORM_string";
- case DW_FORM_block:
- return "DW_FORM_block";
- case DW_FORM_block1:
- return "DW_FORM_block1";
- case DW_FORM_data1:
- return "DW_FORM_data1";
- case DW_FORM_flag:
- return "DW_FORM_flag";
- case DW_FORM_sdata:
- return "DW_FORM_sdata";
- case DW_FORM_strp:
- return "DW_FORM_strp";
- case DW_FORM_udata:
- return "DW_FORM_udata";
- case DW_FORM_ref_addr:
- return "DW_FORM_ref_addr";
- case DW_FORM_ref1:
- return "DW_FORM_ref1";
- case DW_FORM_ref2:
- return "DW_FORM_ref2";
- case DW_FORM_ref4:
- return "DW_FORM_ref4";
- case DW_FORM_ref8:
- return "DW_FORM_ref8";
- case DW_FORM_ref_udata:
- return "DW_FORM_ref_udata";
- case DW_FORM_indirect:
- return "DW_FORM_indirect";
- case DW_FORM_sec_offset:
- return "DW_FORM_sec_offset";
- case DW_FORM_exprloc:
- return "DW_FORM_exprloc";
- case DW_FORM_flag_present:
- return "DW_FORM_flag_present";
- case DW_FORM_sig8:
- return "DW_FORM_sig8";
- default:
- return "DW_FORM_<unknown>";
- }
-}
+ dwarf2_start_subfile (fe->name, dir, comp_dir);
+ }
-/* Convert a DWARF stack opcode into its string name. */
+ /* Decode the table. */
+ while (!end_sequence)
+ {
+ op_code = read_1_byte (abfd, line_ptr);
+ line_ptr += 1;
+ if (line_ptr > line_end)
+ {
+ dwarf2_debug_line_missing_end_sequence_complaint ();
+ break;
+ }
-const char *
-dwarf_stack_op_name (unsigned op, int def)
-{
- switch (op)
- {
- case DW_OP_addr:
- return "DW_OP_addr";
- case DW_OP_deref:
- return "DW_OP_deref";
- case DW_OP_const1u:
+ if (op_code >= lh->opcode_base)
+ {
+ /* Special operand. */
+ adj_opcode = op_code - lh->opcode_base;
+ address += (((op_index + (adj_opcode / lh->line_range))
+ / lh->maximum_ops_per_instruction)
+ * lh->minimum_instruction_length);
+ op_index = ((op_index + (adj_opcode / lh->line_range))
+ % lh->maximum_ops_per_instruction);
+ line += lh->line_base + (adj_opcode % lh->line_range);
+ if (lh->num_file_names < file || file == 0)
+ dwarf2_debug_line_missing_file_complaint ();
+ /* For now we ignore lines not starting on an
+ instruction boundary. */
+ else if (op_index == 0)
+ {
+ lh->file_names[file - 1].included_p = 1;
+ if (!decode_for_pst_p && is_stmt)
+ {
+ if (last_subfile != current_subfile)
+ {
+ addr = gdbarch_addr_bits_remove (gdbarch, address);
+ if (last_subfile)
+ record_line (last_subfile, 0, addr);
+ last_subfile = current_subfile;
+ }
+ /* Append row to matrix using current values. */
+ addr = check_cu_functions (address, cu);
+ addr = gdbarch_addr_bits_remove (gdbarch, addr);
+ record_line (current_subfile, line, addr);
+ }
+ }
+ basic_block = 0;
+ }
+ else switch (op_code)
+ {
+ case DW_LNS_extended_op:
+ extended_len = read_unsigned_leb128 (abfd, line_ptr,
+ &bytes_read);
+ line_ptr += bytes_read;
+ extended_end = line_ptr + extended_len;
+ extended_op = read_1_byte (abfd, line_ptr);
+ line_ptr += 1;
+ switch (extended_op)
+ {
+ case DW_LNE_end_sequence:
+ end_sequence = 1;
+ break;
+ case DW_LNE_set_address:
+ address = read_address (abfd, line_ptr, cu, &bytes_read);
+ op_index = 0;
+ line_ptr += bytes_read;
+ address += baseaddr;
+ break;
+ case DW_LNE_define_file:
+ {
+ char *cur_file;
+ unsigned int dir_index, mod_time, length;
+
+ cur_file = read_direct_string (abfd, line_ptr,
+ &bytes_read);
+ line_ptr += bytes_read;
+ dir_index =
+ read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ mod_time =
+ read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ length =
+ read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ add_file_name (lh, cur_file, dir_index, mod_time, length);
+ }
+ break;
+ case DW_LNE_set_discriminator:
+ /* The discriminator is not interesting to the debugger;
+ just ignore it. */
+ line_ptr = extended_end;
+ break;
+ default:
+ complaint (&symfile_complaints,
+ _("mangled .debug_line section"));
+ return;
+ }
+ /* Make sure that we parsed the extended op correctly. If e.g.
+ we expected a different address size than the producer used,
+ we may have read the wrong number of bytes. */
+ if (line_ptr != extended_end)
+ {
+ complaint (&symfile_complaints,
+ _("mangled .debug_line section"));
+ return;
+ }
+ break;
+ case DW_LNS_copy:
+ if (lh->num_file_names < file || file == 0)
+ dwarf2_debug_line_missing_file_complaint ();
+ else
+ {
+ lh->file_names[file - 1].included_p = 1;
+ if (!decode_for_pst_p && is_stmt)
+ {
+ if (last_subfile != current_subfile)
+ {
+ addr = gdbarch_addr_bits_remove (gdbarch, address);
+ if (last_subfile)
+ record_line (last_subfile, 0, addr);
+ last_subfile = current_subfile;
+ }
+ addr = check_cu_functions (address, cu);
+ addr = gdbarch_addr_bits_remove (gdbarch, addr);
+ record_line (current_subfile, line, addr);
+ }
+ }
+ basic_block = 0;
+ break;
+ case DW_LNS_advance_pc:
+ {
+ CORE_ADDR adjust
+ = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+
+ address += (((op_index + adjust)
+ / lh->maximum_ops_per_instruction)
+ * lh->minimum_instruction_length);
+ op_index = ((op_index + adjust)
+ % lh->maximum_ops_per_instruction);
+ line_ptr += bytes_read;
+ }
+ break;
+ case DW_LNS_advance_line:
+ line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ break;
+ case DW_LNS_set_file:
+ {
+ /* The arrays lh->include_dirs and lh->file_names are
+ 0-based, but the directory and file name numbers in
+ the statement program are 1-based. */
+ struct file_entry *fe;
+ char *dir = NULL;
+
+ file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ if (lh->num_file_names < file || file == 0)
+ dwarf2_debug_line_missing_file_complaint ();
+ else
+ {
+ fe = &lh->file_names[file - 1];
+ if (fe->dir_index)
+ dir = lh->include_dirs[fe->dir_index - 1];
+ if (!decode_for_pst_p)
+ {
+ last_subfile = current_subfile;
+ dwarf2_start_subfile (fe->name, dir, comp_dir);
+ }
+ }
+ }
+ break;
+ case DW_LNS_set_column:
+ column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ break;
+ case DW_LNS_negate_stmt:
+ is_stmt = (!is_stmt);
+ break;
+ case DW_LNS_set_basic_block:
+ basic_block = 1;
+ break;
+ /* Add to the address register of the state machine the
+ address increment value corresponding to special opcode
+ 255. I.e., this value is scaled by the minimum
+ instruction length since special opcode 255 would have
+ scaled the increment. */
+ case DW_LNS_const_add_pc:
+ {
+ CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range;
+
+ address += (((op_index + adjust)
+ / lh->maximum_ops_per_instruction)
+ * lh->minimum_instruction_length);
+ op_index = ((op_index + adjust)
+ % lh->maximum_ops_per_instruction);
+ }
+ break;
+ case DW_LNS_fixed_advance_pc:
+ address += read_2_bytes (abfd, line_ptr);
+ op_index = 0;
+ line_ptr += 2;
+ break;
+ default:
+ {
+ /* Unknown standard opcode, ignore it. */
+ int i;
+
+ for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
+ {
+ (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ }
+ }
+ }
+ }
+ if (lh->num_file_names < file || file == 0)
+ dwarf2_debug_line_missing_file_complaint ();
+ else
+ {
+ lh->file_names[file - 1].included_p = 1;
+ if (!decode_for_pst_p)
+ {
+ addr = gdbarch_addr_bits_remove (gdbarch, address);
+ record_line (current_subfile, 0, addr);
+ }
+ }
+ }
+
+ if (decode_for_pst_p)
+ {
+ int file_index;
+
+ /* Now that we're done scanning the Line Header Program, we can
+ create the psymtab of each included file. */
+ for (file_index = 0; file_index < lh->num_file_names; file_index++)
+ if (lh->file_names[file_index].included_p == 1)
+ {
+ char *include_name =
+ psymtab_include_file_name (lh, file_index, pst, comp_dir);
+ if (include_name != NULL)
+ dwarf2_create_include_psymtab (include_name, pst, objfile);
+ }
+ }
+ else
+ {
+ /* Make sure a symtab is created for every file, even files
+ which contain only variables (i.e. no code with associated
+ line numbers). */
+
+ int i;
+ struct file_entry *fe;
+
+ for (i = 0; i < lh->num_file_names; i++)
+ {
+ char *dir = NULL;
+
+ fe = &lh->file_names[i];
+ if (fe->dir_index)
+ dir = lh->include_dirs[fe->dir_index - 1];
+ dwarf2_start_subfile (fe->name, dir, comp_dir);
+
+ /* Skip the main file; we don't need it, and it must be
+ allocated last, so that it will show up before the
+ non-primary symtabs in the objfile's symtab list. */
+ if (current_subfile == first_subfile)
+ continue;
+
+ if (current_subfile->symtab == NULL)
+ current_subfile->symtab = allocate_symtab (current_subfile->name,
+ cu->objfile);
+ fe->symtab = current_subfile->symtab;
+ }
+ }
+}
+
+/* Start a subfile for DWARF. FILENAME is the name of the file and
+ DIRNAME the name of the source directory which contains FILENAME
+ or NULL if not known. COMP_DIR is the compilation directory for the
+ linetable's compilation unit or NULL if not known.
+ This routine tries to keep line numbers from identical absolute and
+ relative file names in a common subfile.
+
+ Using the `list' example from the GDB testsuite, which resides in
+ /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
+ of /srcdir/list0.c yields the following debugging information for list0.c:
+
+ DW_AT_name: /srcdir/list0.c
+ DW_AT_comp_dir: /compdir
+ files.files[0].name: list0.h
+ files.files[0].dir: /srcdir
+ files.files[1].name: list0.c
+ files.files[1].dir: /srcdir
+
+ The line number information for list0.c has to end up in a single
+ subfile, so that `break /srcdir/list0.c:1' works as expected.
+ start_subfile will ensure that this happens provided that we pass the
+ concatenation of files.files[1].dir and files.files[1].name as the
+ subfile's name. */
+
+static void
+dwarf2_start_subfile (char *filename, const char *dirname,
+ const char *comp_dir)
+{
+ char *fullname;
+
+ /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
+ `start_symtab' will always pass the contents of DW_AT_comp_dir as
+ second argument to start_subfile. To be consistent, we do the
+ same here. In order not to lose the line information directory,
+ we concatenate it to the filename when it makes sense.
+ Note that the Dwarf3 standard says (speaking of filenames in line
+ information): ``The directory index is ignored for file names
+ that represent full path names''. Thus ignoring dirname in the
+ `else' branch below isn't an issue. */
+
+ if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
+ fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
+ else
+ fullname = filename;
+
+ start_subfile (fullname, comp_dir);
+
+ if (fullname != filename)
+ xfree (fullname);
+}
+
+static void
+var_decode_location (struct attribute *attr, struct symbol *sym,
+ struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ struct comp_unit_head *cu_header = &cu->header;
+
+ /* NOTE drow/2003-01-30: There used to be a comment and some special
+ code here to turn a symbol with DW_AT_external and a
+ SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
+ necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
+ with some versions of binutils) where shared libraries could have
+ relocations against symbols in their debug information - the
+ minimal symbol would have the right address, but the debug info
+ would not. It's no longer necessary, because we will explicitly
+ apply relocations when we read in the debug information now. */
+
+ /* A DW_AT_location attribute with no contents indicates that a
+ variable has been optimized away. */
+ if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
+ {
+ SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
+ return;
+ }
+
+ /* Handle one degenerate form of location expression specially, to
+ preserve GDB's previous behavior when section offsets are
+ specified. If this is just a DW_OP_addr then mark this symbol
+ as LOC_STATIC. */
+
+ if (attr_form_is_block (attr)
+ && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
+ && DW_BLOCK (attr)->data[0] == DW_OP_addr)
+ {
+ unsigned int dummy;
+
+ SYMBOL_VALUE_ADDRESS (sym) =
+ read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
+ SYMBOL_CLASS (sym) = LOC_STATIC;
+ fixup_symbol_section (sym, objfile);
+ SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
+ SYMBOL_SECTION (sym));
+ return;
+ }
+
+ /* NOTE drow/2002-01-30: It might be worthwhile to have a static
+ expression evaluator, and use LOC_COMPUTED only when necessary
+ (i.e. when the value of a register or memory location is
+ referenced, or a thread-local block, etc.). Then again, it might
+ not be worthwhile. I'm assuming that it isn't unless performance
+ or memory numbers show me otherwise. */
+
+ dwarf2_symbol_mark_computed (attr, sym, cu);
+ SYMBOL_CLASS (sym) = LOC_COMPUTED;
+}
+
+/* Given a pointer to a DWARF information entry, figure out if we need
+ to make a symbol table entry for it, and if so, create a new entry
+ and return a pointer to it.
+ If TYPE is NULL, determine symbol type from the die, otherwise
+ used the passed type.
+ If SPACE is not NULL, use it to hold the new symbol. If it is
+ NULL, allocate a new symbol on the objfile's obstack. */
+
+static struct symbol *
+new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu,
+ struct symbol *space)
+{
+ struct objfile *objfile = cu->objfile;
+ struct symbol *sym = NULL;
+ char *name;
+ struct attribute *attr = NULL;
+ struct attribute *attr2 = NULL;
+ CORE_ADDR baseaddr;
+ struct pending **list_to_add = NULL;
+
+ int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
+
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+
+ name = dwarf2_name (die, cu);
+ if (name)
+ {
+ const char *linkagename;
+ int suppress_add = 0;
+
+ if (space)
+ sym = space;
+ else
+ sym = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol);
+ OBJSTAT (objfile, n_syms++);
+
+ /* Cache this symbol's name and the name's demangled form (if any). */
+ SYMBOL_SET_LANGUAGE (sym, cu->language);
+ linkagename = dwarf2_physname (name, die, cu);
+ SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile);
+
+ /* Fortran does not have mangling standard and the mangling does differ
+ between gfortran, iFort etc. */
+ if (cu->language == language_fortran
+ && symbol_get_demangled_name (&(sym->ginfo)) == NULL)
+ symbol_set_demangled_name (&(sym->ginfo),
+ (char *) dwarf2_full_name (name, die, cu),
+ NULL);
+
+ /* Default assumptions.
+ Use the passed type or decode it from the die. */
+ SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
+ SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
+ if (type != NULL)
+ SYMBOL_TYPE (sym) = type;
+ else
+ SYMBOL_TYPE (sym) = die_type (die, cu);
+ attr = dwarf2_attr (die,
+ inlined_func ? DW_AT_call_line : DW_AT_decl_line,
+ cu);
+ if (attr)
+ {
+ SYMBOL_LINE (sym) = DW_UNSND (attr);
+ }
+
+ attr = dwarf2_attr (die,
+ inlined_func ? DW_AT_call_file : DW_AT_decl_file,
+ cu);
+ if (attr)
+ {
+ int file_index = DW_UNSND (attr);
+
+ if (cu->line_header == NULL
+ || file_index > cu->line_header->num_file_names)
+ complaint (&symfile_complaints,
+ _("file index out of range"));
+ else if (file_index > 0)
+ {
+ struct file_entry *fe;
+
+ fe = &cu->line_header->file_names[file_index - 1];
+ SYMBOL_SYMTAB (sym) = fe->symtab;
+ }
+ }
+
+ switch (die->tag)
+ {
+ case DW_TAG_label:
+ attr = dwarf2_attr (die, DW_AT_low_pc, cu);
+ if (attr)
+ {
+ SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
+ }
+ SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr;
+ SYMBOL_DOMAIN (sym) = LABEL_DOMAIN;
+ SYMBOL_CLASS (sym) = LOC_LABEL;
+ add_symbol_to_list (sym, cu->list_in_scope);
+ break;
+ case DW_TAG_subprogram:
+ /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
+ finish_block. */
+ SYMBOL_CLASS (sym) = LOC_BLOCK;
+ attr2 = dwarf2_attr (die, DW_AT_external, cu);
+ if ((attr2 && (DW_UNSND (attr2) != 0))
+ || cu->language == language_ada)
+ {
+ /* Subprograms marked external are stored as a global symbol.
+ Ada subprograms, whether marked external or not, are always
+ stored as a global symbol, because we want to be able to
+ access them globally. For instance, we want to be able
+ to break on a nested subprogram without having to
+ specify the context. */
+ list_to_add = &global_symbols;
+ }
+ else
+ {
+ list_to_add = cu->list_in_scope;
+ }
+ break;
+ case DW_TAG_inlined_subroutine:
+ /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
+ finish_block. */
+ SYMBOL_CLASS (sym) = LOC_BLOCK;
+ SYMBOL_INLINED (sym) = 1;
+ /* Do not add the symbol to any lists. It will be found via
+ BLOCK_FUNCTION from the blockvector. */
+ break;
+ case DW_TAG_template_value_param:
+ suppress_add = 1;
+ /* Fall through. */
+ case DW_TAG_constant:
+ case DW_TAG_variable:
+ case DW_TAG_member:
+ /* Compilation with minimal debug info may result in
+ variables with missing type entries. Change the
+ misleading `void' type to something sensible. */
+ if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
+ SYMBOL_TYPE (sym)
+ = objfile_type (objfile)->nodebug_data_symbol;
+
+ attr = dwarf2_attr (die, DW_AT_const_value, cu);
+ /* In the case of DW_TAG_member, we should only be called for
+ static const members. */
+ if (die->tag == DW_TAG_member)
+ {
+ /* dwarf2_add_field uses die_is_declaration,
+ so we do the same. */
+ gdb_assert (die_is_declaration (die, cu));
+ gdb_assert (attr);
+ }
+ if (attr)
+ {
+ dwarf2_const_value (attr, sym, cu);
+ attr2 = dwarf2_attr (die, DW_AT_external, cu);
+ if (!suppress_add)
+ {
+ if (attr2 && (DW_UNSND (attr2) != 0))
+ list_to_add = &global_symbols;
+ else
+ list_to_add = cu->list_in_scope;
+ }
+ break;
+ }
+ attr = dwarf2_attr (die, DW_AT_location, cu);
+ if (attr)
+ {
+ var_decode_location (attr, sym, cu);
+ attr2 = dwarf2_attr (die, DW_AT_external, cu);
+ if (SYMBOL_CLASS (sym) == LOC_STATIC
+ && SYMBOL_VALUE_ADDRESS (sym) == 0
+ && !dwarf2_per_objfile->has_section_at_zero)
+ {
+ /* When a static variable is eliminated by the linker,
+ the corresponding debug information is not stripped
+ out, but the variable address is set to null;
+ do not add such variables into symbol table. */
+ }
+ else if (attr2 && (DW_UNSND (attr2) != 0))
+ {
+ /* Workaround gfortran PR debug/40040 - it uses
+ DW_AT_location for variables in -fPIC libraries which may
+ get overriden by other libraries/executable and get
+ a different address. Resolve it by the minimal symbol
+ which may come from inferior's executable using copy
+ relocation. Make this workaround only for gfortran as for
+ other compilers GDB cannot guess the minimal symbol
+ Fortran mangling kind. */
+ if (cu->language == language_fortran && die->parent
+ && die->parent->tag == DW_TAG_module
+ && cu->producer
+ && strncmp (cu->producer, "GNU Fortran ", 12) == 0)
+ SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
+
+ /* A variable with DW_AT_external is never static,
+ but it may be block-scoped. */
+ list_to_add = (cu->list_in_scope == &file_symbols
+ ? &global_symbols : cu->list_in_scope);
+ }
+ else
+ list_to_add = cu->list_in_scope;
+ }
+ else
+ {
+ /* We do not know the address of this symbol.
+ If it is an external symbol and we have type information
+ for it, enter the symbol as a LOC_UNRESOLVED symbol.
+ The address of the variable will then be determined from
+ the minimal symbol table whenever the variable is
+ referenced. */
+ attr2 = dwarf2_attr (die, DW_AT_external, cu);
+ if (attr2 && (DW_UNSND (attr2) != 0)
+ && dwarf2_attr (die, DW_AT_type, cu) != NULL)
+ {
+ /* A variable with DW_AT_external is never static, but it
+ may be block-scoped. */
+ list_to_add = (cu->list_in_scope == &file_symbols
+ ? &global_symbols : cu->list_in_scope);
+
+ SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
+ }
+ else if (!die_is_declaration (die, cu))
+ {
+ /* Use the default LOC_OPTIMIZED_OUT class. */
+ gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT);
+ if (!suppress_add)
+ list_to_add = cu->list_in_scope;
+ }
+ }
+ break;
+ case DW_TAG_formal_parameter:
+ /* If we are inside a function, mark this as an argument. If
+ not, we might be looking at an argument to an inlined function
+ when we do not have enough information to show inlined frames;
+ pretend it's a local variable in that case so that the user can
+ still see it. */
+ if (context_stack_depth > 0
+ && context_stack[context_stack_depth - 1].name != NULL)
+ SYMBOL_IS_ARGUMENT (sym) = 1;
+ attr = dwarf2_attr (die, DW_AT_location, cu);
+ if (attr)
+ {
+ var_decode_location (attr, sym, cu);
+ }
+ attr = dwarf2_attr (die, DW_AT_const_value, cu);
+ if (attr)
+ {
+ dwarf2_const_value (attr, sym, cu);
+ }
+ attr = dwarf2_attr (die, DW_AT_variable_parameter, cu);
+ if (attr && DW_UNSND (attr))
+ {
+ struct type *ref_type;
+
+ ref_type = lookup_reference_type (SYMBOL_TYPE (sym));
+ SYMBOL_TYPE (sym) = ref_type;
+ }
+
+ list_to_add = cu->list_in_scope;
+ break;
+ case DW_TAG_unspecified_parameters:
+ /* From varargs functions; gdb doesn't seem to have any
+ interest in this information, so just ignore it for now.
+ (FIXME?) */
+ break;
+ case DW_TAG_template_type_param:
+ suppress_add = 1;
+ /* Fall through. */
+ case DW_TAG_class_type:
+ case DW_TAG_interface_type:
+ case DW_TAG_structure_type:
+ case DW_TAG_union_type:
+ case DW_TAG_set_type:
+ case DW_TAG_enumeration_type:
+ SYMBOL_CLASS (sym) = LOC_TYPEDEF;
+ SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
+
+ {
+ /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
+ really ever be static objects: otherwise, if you try
+ to, say, break of a class's method and you're in a file
+ which doesn't mention that class, it won't work unless
+ the check for all static symbols in lookup_symbol_aux
+ saves you. See the OtherFileClass tests in
+ gdb.c++/namespace.exp. */
+
+ if (!suppress_add)
+ {
+ list_to_add = (cu->list_in_scope == &file_symbols
+ && (cu->language == language_cplus
+ || cu->language == language_java)
+ ? &global_symbols : cu->list_in_scope);
+
+ /* The semantics of C++ state that "struct foo {
+ ... }" also defines a typedef for "foo". A Java
+ class declaration also defines a typedef for the
+ class. */
+ if (cu->language == language_cplus
+ || cu->language == language_java
+ || cu->language == language_ada)
+ {
+ /* The symbol's name is already allocated along
+ with this objfile, so we don't need to
+ duplicate it for the type. */
+ if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
+ TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
+ }
+ }
+ }
+ break;
+ case DW_TAG_typedef:
+ SYMBOL_CLASS (sym) = LOC_TYPEDEF;
+ SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
+ list_to_add = cu->list_in_scope;
+ break;
+ case DW_TAG_base_type:
+ case DW_TAG_subrange_type:
+ SYMBOL_CLASS (sym) = LOC_TYPEDEF;
+ SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
+ list_to_add = cu->list_in_scope;
+ break;
+ case DW_TAG_enumerator:
+ attr = dwarf2_attr (die, DW_AT_const_value, cu);
+ if (attr)
+ {
+ dwarf2_const_value (attr, sym, cu);
+ }
+ {
+ /* NOTE: carlton/2003-11-10: See comment above in the
+ DW_TAG_class_type, etc. block. */
+
+ list_to_add = (cu->list_in_scope == &file_symbols
+ && (cu->language == language_cplus
+ || cu->language == language_java)
+ ? &global_symbols : cu->list_in_scope);
+ }
+ break;
+ case DW_TAG_namespace:
+ SYMBOL_CLASS (sym) = LOC_TYPEDEF;
+ list_to_add = &global_symbols;
+ break;
+ default:
+ /* Not a tag we recognize. Hopefully we aren't processing
+ trash data, but since we must specifically ignore things
+ we don't recognize, there is nothing else we should do at
+ this point. */
+ complaint (&symfile_complaints, _("unsupported tag: '%s'"),
+ dwarf_tag_name (die->tag));
+ break;
+ }
+
+ if (suppress_add)
+ {
+ sym->hash_next = objfile->template_symbols;
+ objfile->template_symbols = sym;
+ list_to_add = NULL;
+ }
+
+ if (list_to_add != NULL)
+ add_symbol_to_list (sym, list_to_add);
+
+ /* For the benefit of old versions of GCC, check for anonymous
+ namespaces based on the demangled name. */
+ if (!processing_has_namespace_info
+ && cu->language == language_cplus)
+ cp_scan_for_anonymous_namespaces (sym);
+ }
+ return (sym);
+}
+
+/* A wrapper for new_symbol_full that always allocates a new symbol. */
+
+static struct symbol *
+new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
+{
+ return new_symbol_full (die, type, cu, NULL);
+}
+
+/* Given an attr with a DW_FORM_dataN value in host byte order,
+ zero-extend it as appropriate for the symbol's type. The DWARF
+ standard (v4) is not entirely clear about the meaning of using
+ DW_FORM_dataN for a constant with a signed type, where the type is
+ wider than the data. The conclusion of a discussion on the DWARF
+ list was that this is unspecified. We choose to always zero-extend
+ because that is the interpretation long in use by GCC. */
+
+static gdb_byte *
+dwarf2_const_value_data (struct attribute *attr, struct type *type,
+ const char *name, struct obstack *obstack,
+ struct dwarf2_cu *cu, long *value, int bits)
+{
+ struct objfile *objfile = cu->objfile;
+ enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ?
+ BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
+ LONGEST l = DW_UNSND (attr);
+
+ if (bits < sizeof (*value) * 8)
+ {
+ l &= ((LONGEST) 1 << bits) - 1;
+ *value = l;
+ }
+ else if (bits == sizeof (*value) * 8)
+ *value = l;
+ else
+ {
+ gdb_byte *bytes = obstack_alloc (obstack, bits / 8);
+ store_unsigned_integer (bytes, bits / 8, byte_order, l);
+ return bytes;
+ }
+
+ return NULL;
+}
+
+/* Read a constant value from an attribute. Either set *VALUE, or if
+ the value does not fit in *VALUE, set *BYTES - either already
+ allocated on the objfile obstack, or newly allocated on OBSTACK,
+ or, set *BATON, if we translated the constant to a location
+ expression. */
+
+static void
+dwarf2_const_value_attr (struct attribute *attr, struct type *type,
+ const char *name, struct obstack *obstack,
+ struct dwarf2_cu *cu,
+ long *value, gdb_byte **bytes,
+ struct dwarf2_locexpr_baton **baton)
+{
+ struct objfile *objfile = cu->objfile;
+ struct comp_unit_head *cu_header = &cu->header;
+ struct dwarf_block *blk;
+ enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ?
+ BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE);
+
+ *value = 0;
+ *bytes = NULL;
+ *baton = NULL;
+
+ switch (attr->form)
+ {
+ case DW_FORM_addr:
+ {
+ gdb_byte *data;
+
+ if (TYPE_LENGTH (type) != cu_header->addr_size)
+ dwarf2_const_value_length_mismatch_complaint (name,
+ cu_header->addr_size,
+ TYPE_LENGTH (type));
+ /* Symbols of this form are reasonably rare, so we just
+ piggyback on the existing location code rather than writing
+ a new implementation of symbol_computed_ops. */
+ *baton = obstack_alloc (&objfile->objfile_obstack,
+ sizeof (struct dwarf2_locexpr_baton));
+ (*baton)->per_cu = cu->per_cu;
+ gdb_assert ((*baton)->per_cu);
+
+ (*baton)->size = 2 + cu_header->addr_size;
+ data = obstack_alloc (&objfile->objfile_obstack, (*baton)->size);
+ (*baton)->data = data;
+
+ data[0] = DW_OP_addr;
+ store_unsigned_integer (&data[1], cu_header->addr_size,
+ byte_order, DW_ADDR (attr));
+ data[cu_header->addr_size + 1] = DW_OP_stack_value;
+ }
+ break;
+ case DW_FORM_string:
+ case DW_FORM_strp:
+ /* DW_STRING is already allocated on the objfile obstack, point
+ directly to it. */
+ *bytes = (gdb_byte *) DW_STRING (attr);
+ break;
+ case DW_FORM_block1:
+ case DW_FORM_block2:
+ case DW_FORM_block4:
+ case DW_FORM_block:
+ case DW_FORM_exprloc:
+ blk = DW_BLOCK (attr);
+ if (TYPE_LENGTH (type) != blk->size)
+ dwarf2_const_value_length_mismatch_complaint (name, blk->size,
+ TYPE_LENGTH (type));
+ *bytes = blk->data;
+ break;
+
+ /* The DW_AT_const_value attributes are supposed to carry the
+ symbol's value "represented as it would be on the target
+ architecture." By the time we get here, it's already been
+ converted to host endianness, so we just need to sign- or
+ zero-extend it as appropriate. */
+ case DW_FORM_data1:
+ *bytes = dwarf2_const_value_data (attr, type, name,
+ obstack, cu, value, 8);
+ break;
+ case DW_FORM_data2:
+ *bytes = dwarf2_const_value_data (attr, type, name,
+ obstack, cu, value, 16);
+ break;
+ case DW_FORM_data4:
+ *bytes = dwarf2_const_value_data (attr, type, name,
+ obstack, cu, value, 32);
+ break;
+ case DW_FORM_data8:
+ *bytes = dwarf2_const_value_data (attr, type, name,
+ obstack, cu, value, 64);
+ break;
+
+ case DW_FORM_sdata:
+ *value = DW_SND (attr);
+ break;
+
+ case DW_FORM_udata:
+ *value = DW_UNSND (attr);
+ break;
+
+ default:
+ complaint (&symfile_complaints,
+ _("unsupported const value attribute form: '%s'"),
+ dwarf_form_name (attr->form));
+ *value = 0;
+ break;
+ }
+}
+
+
+/* Copy constant value from an attribute to a symbol. */
+
+static void
+dwarf2_const_value (struct attribute *attr, struct symbol *sym,
+ struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ struct comp_unit_head *cu_header = &cu->header;
+ long value;
+ gdb_byte *bytes;
+ struct dwarf2_locexpr_baton *baton;
+
+ dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym),
+ SYMBOL_PRINT_NAME (sym),
+ &objfile->objfile_obstack, cu,
+ &value, &bytes, &baton);
+
+ if (baton != NULL)
+ {
+ SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
+ SYMBOL_LOCATION_BATON (sym) = baton;
+ SYMBOL_CLASS (sym) = LOC_COMPUTED;
+ }
+ else if (bytes != NULL)
+ {
+ SYMBOL_VALUE_BYTES (sym) = bytes;
+ SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
+ }
+ else
+ {
+ SYMBOL_VALUE (sym) = value;
+ SYMBOL_CLASS (sym) = LOC_CONST;
+ }
+}
+
+/* Return the type of the die in question using its DW_AT_type attribute. */
+
+static struct type *
+die_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct attribute *type_attr;
+
+ type_attr = dwarf2_attr (die, DW_AT_type, cu);
+ if (!type_attr)
+ {
+ /* A missing DW_AT_type represents a void type. */
+ return objfile_type (cu->objfile)->builtin_void;
+ }
+
+ return lookup_die_type (die, type_attr, cu);
+}
+
+/* True iff CU's producer generates GNAT Ada auxiliary information
+ that allows to find parallel types through that information instead
+ of having to do expensive parallel lookups by type name. */
+
+static int
+need_gnat_info (struct dwarf2_cu *cu)
+{
+ /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
+ of GNAT produces this auxiliary information, without any indication
+ that it is produced. Part of enhancing the FSF version of GNAT
+ to produce that information will be to put in place an indicator
+ that we can use in order to determine whether the descriptive type
+ info is available or not. One suggestion that has been made is
+ to use a new attribute, attached to the CU die. For now, assume
+ that the descriptive type info is not available. */
+ return 0;
+}
+
+/* Return the auxiliary type of the die in question using its
+ DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
+ attribute is not present. */
+
+static struct type *
+die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct attribute *type_attr;
+
+ type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu);
+ if (!type_attr)
+ return NULL;
+
+ return lookup_die_type (die, type_attr, cu);
+}
+
+/* If DIE has a descriptive_type attribute, then set the TYPE's
+ descriptive type accordingly. */
+
+static void
+set_descriptive_type (struct type *type, struct die_info *die,
+ struct dwarf2_cu *cu)
+{
+ struct type *descriptive_type = die_descriptive_type (die, cu);
+
+ if (descriptive_type)
+ {
+ ALLOCATE_GNAT_AUX_TYPE (type);
+ TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type;
+ }
+}
+
+/* Return the containing type of the die in question using its
+ DW_AT_containing_type attribute. */
+
+static struct type *
+die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct attribute *type_attr;
+
+ type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
+ if (!type_attr)
+ error (_("Dwarf Error: Problem turning containing type into gdb type "
+ "[in module %s]"), cu->objfile->name);
+
+ return lookup_die_type (die, type_attr, cu);
+}
+
+/* Look up the type of DIE in CU using its type attribute ATTR.
+ If there is no type substitute an error marker. */
+
+static struct type *
+lookup_die_type (struct die_info *die, struct attribute *attr,
+ struct dwarf2_cu *cu)
+{
+ struct type *this_type;
+
+ /* First see if we have it cached. */
+
+ if (is_ref_attr (attr))
+ {
+ unsigned int offset = dwarf2_get_ref_die_offset (attr);
+
+ this_type = get_die_type_at_offset (offset, cu->per_cu);
+ }
+ else if (attr->form == DW_FORM_sig8)
+ {
+ struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
+ struct dwarf2_cu *sig_cu;
+ unsigned int offset;
+
+ /* sig_type will be NULL if the signatured type is missing from
+ the debug info. */
+ if (sig_type == NULL)
+ error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
+ "at 0x%x [in module %s]"),
+ die->offset, cu->objfile->name);
+
+ gdb_assert (sig_type->per_cu.from_debug_types);
+ offset = sig_type->offset + sig_type->type_offset;
+ this_type = get_die_type_at_offset (offset, &sig_type->per_cu);
+ }
+ else
+ {
+ dump_die_for_error (die);
+ error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
+ dwarf_attr_name (attr->name), cu->objfile->name);
+ }
+
+ /* If not cached we need to read it in. */
+
+ if (this_type == NULL)
+ {
+ struct die_info *type_die;
+ struct dwarf2_cu *type_cu = cu;
+
+ type_die = follow_die_ref_or_sig (die, attr, &type_cu);
+ /* If the type is cached, we should have found it above. */
+ gdb_assert (get_die_type (type_die, type_cu) == NULL);
+ this_type = read_type_die_1 (type_die, type_cu);
+ }
+
+ /* If we still don't have a type use an error marker. */
+
+ if (this_type == NULL)
+ {
+ char *message, *saved;
+
+ /* read_type_die already issued a complaint. */
+ message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
+ cu->objfile->name,
+ cu->header.offset,
+ die->offset);
+ saved = obstack_copy0 (&cu->objfile->objfile_obstack,
+ message, strlen (message));
+ xfree (message);
+
+ this_type = init_type (TYPE_CODE_ERROR, 0, 0, saved, cu->objfile);
+ }
+
+ return this_type;
+}
+
+/* Return the type in DIE, CU.
+ Returns NULL for invalid types.
+
+ This first does a lookup in the appropriate type_hash table,
+ and only reads the die in if necessary.
+
+ NOTE: This can be called when reading in partial or full symbols. */
+
+static struct type *
+read_type_die (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct type *this_type;
+
+ this_type = get_die_type (die, cu);
+ if (this_type)
+ return this_type;
+
+ return read_type_die_1 (die, cu);
+}
+
+/* Read the type in DIE, CU.
+ Returns NULL for invalid types. */
+
+static struct type *
+read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct type *this_type = NULL;
+
+ switch (die->tag)
+ {
+ case DW_TAG_class_type:
+ case DW_TAG_interface_type:
+ case DW_TAG_structure_type:
+ case DW_TAG_union_type:
+ this_type = read_structure_type (die, cu);
+ break;
+ case DW_TAG_enumeration_type:
+ this_type = read_enumeration_type (die, cu);
+ break;
+ case DW_TAG_subprogram:
+ case DW_TAG_subroutine_type:
+ case DW_TAG_inlined_subroutine:
+ this_type = read_subroutine_type (die, cu);
+ break;
+ case DW_TAG_array_type:
+ this_type = read_array_type (die, cu);
+ break;
+ case DW_TAG_set_type:
+ this_type = read_set_type (die, cu);
+ break;
+ case DW_TAG_pointer_type:
+ this_type = read_tag_pointer_type (die, cu);
+ break;
+ case DW_TAG_ptr_to_member_type:
+ this_type = read_tag_ptr_to_member_type (die, cu);
+ break;
+ case DW_TAG_reference_type:
+ this_type = read_tag_reference_type (die, cu);
+ break;
+ case DW_TAG_const_type:
+ this_type = read_tag_const_type (die, cu);
+ break;
+ case DW_TAG_volatile_type:
+ this_type = read_tag_volatile_type (die, cu);
+ break;
+ case DW_TAG_string_type:
+ this_type = read_tag_string_type (die, cu);
+ break;
+ case DW_TAG_typedef:
+ this_type = read_typedef (die, cu);
+ break;
+ case DW_TAG_subrange_type:
+ this_type = read_subrange_type (die, cu);
+ break;
+ case DW_TAG_base_type:
+ this_type = read_base_type (die, cu);
+ break;
+ case DW_TAG_unspecified_type:
+ this_type = read_unspecified_type (die, cu);
+ break;
+ case DW_TAG_namespace:
+ this_type = read_namespace_type (die, cu);
+ break;
+ case DW_TAG_module:
+ this_type = read_module_type (die, cu);
+ break;
+ default:
+ complaint (&symfile_complaints,
+ _("unexpected tag in read_type_die: '%s'"),
+ dwarf_tag_name (die->tag));
+ break;
+ }
+
+ return this_type;
+}
+
+/* See if we can figure out if the class lives in a namespace. We do
+ this by looking for a member function; its demangled name will
+ contain namespace info, if there is any.
+ Return the computed name or NULL.
+ Space for the result is allocated on the objfile's obstack.
+ This is the full-die version of guess_partial_die_structure_name.
+ In this case we know DIE has no useful parent. */
+
+static char *
+guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct die_info *spec_die;
+ struct dwarf2_cu *spec_cu;
+ struct die_info *child;
+
+ spec_cu = cu;
+ spec_die = die_specification (die, &spec_cu);
+ if (spec_die != NULL)
+ {
+ die = spec_die;
+ cu = spec_cu;
+ }
+
+ for (child = die->child;
+ child != NULL;
+ child = child->sibling)
+ {
+ if (child->tag == DW_TAG_subprogram)
+ {
+ struct attribute *attr;
+
+ attr = dwarf2_attr (child, DW_AT_linkage_name, cu);
+ if (attr == NULL)
+ attr = dwarf2_attr (child, DW_AT_MIPS_linkage_name, cu);
+ if (attr != NULL)
+ {
+ char *actual_name
+ = language_class_name_from_physname (cu->language_defn,
+ DW_STRING (attr));
+ char *name = NULL;
+
+ if (actual_name != NULL)
+ {
+ char *die_name = dwarf2_name (die, cu);
+
+ if (die_name != NULL
+ && strcmp (die_name, actual_name) != 0)
+ {
+ /* Strip off the class name from the full name.
+ We want the prefix. */
+ int die_name_len = strlen (die_name);
+ int actual_name_len = strlen (actual_name);
+
+ /* Test for '::' as a sanity check. */
+ if (actual_name_len > die_name_len + 2
+ && actual_name[actual_name_len
+ - die_name_len - 1] == ':')
+ name =
+ obsavestring (actual_name,
+ actual_name_len - die_name_len - 2,
+ &cu->objfile->objfile_obstack);
+ }
+ }
+ xfree (actual_name);
+ return name;
+ }
+ }
+ }
+
+ return NULL;
+}
+
+/* Return the name of the namespace/class that DIE is defined within,
+ or "" if we can't tell. The caller should not xfree the result.
+
+ For example, if we're within the method foo() in the following
+ code:
+
+ namespace N {
+ class C {
+ void foo () {
+ }
+ };
+ }
+
+ then determine_prefix on foo's die will return "N::C". */
+
+static char *
+determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct die_info *parent, *spec_die;
+ struct dwarf2_cu *spec_cu;
+ struct type *parent_type;
+
+ if (cu->language != language_cplus && cu->language != language_java
+ && cu->language != language_fortran)
+ return "";
+
+ /* We have to be careful in the presence of DW_AT_specification.
+ For example, with GCC 3.4, given the code
+
+ namespace N {
+ void foo() {
+ // Definition of N::foo.
+ }
+ }
+
+ then we'll have a tree of DIEs like this:
+
+ 1: DW_TAG_compile_unit
+ 2: DW_TAG_namespace // N
+ 3: DW_TAG_subprogram // declaration of N::foo
+ 4: DW_TAG_subprogram // definition of N::foo
+ DW_AT_specification // refers to die #3
+
+ Thus, when processing die #4, we have to pretend that we're in
+ the context of its DW_AT_specification, namely the contex of die
+ #3. */
+ spec_cu = cu;
+ spec_die = die_specification (die, &spec_cu);
+ if (spec_die == NULL)
+ parent = die->parent;
+ else
+ {
+ parent = spec_die->parent;
+ cu = spec_cu;
+ }
+
+ if (parent == NULL)
+ return "";
+ else if (parent->building_fullname)
+ {
+ const char *name;
+ const char *parent_name;
+
+ /* It has been seen on RealView 2.2 built binaries,
+ DW_TAG_template_type_param types actually _defined_ as
+ children of the parent class:
+
+ enum E {};
+ template class <class Enum> Class{};
+ Class<enum E> class_e;
+
+ 1: DW_TAG_class_type (Class)
+ 2: DW_TAG_enumeration_type (E)
+ 3: DW_TAG_enumerator (enum1:0)
+ 3: DW_TAG_enumerator (enum2:1)
+ ...
+ 2: DW_TAG_template_type_param
+ DW_AT_type DW_FORM_ref_udata (E)
+
+ Besides being broken debug info, it can put GDB into an
+ infinite loop. Consider:
+
+ When we're building the full name for Class<E>, we'll start
+ at Class, and go look over its template type parameters,
+ finding E. We'll then try to build the full name of E, and
+ reach here. We're now trying to build the full name of E,
+ and look over the parent DIE for containing scope. In the
+ broken case, if we followed the parent DIE of E, we'd again
+ find Class, and once again go look at its template type
+ arguments, etc., etc. Simply don't consider such parent die
+ as source-level parent of this die (it can't be, the language
+ doesn't allow it), and break the loop here. */
+ name = dwarf2_name (die, cu);
+ parent_name = dwarf2_name (parent, cu);
+ complaint (&symfile_complaints,
+ _("template param type '%s' defined within parent '%s'"),
+ name ? name : "<unknown>",
+ parent_name ? parent_name : "<unknown>");
+ return "";
+ }
+ else
+ switch (parent->tag)
+ {
+ case DW_TAG_namespace:
+ parent_type = read_type_die (parent, cu);
+ /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
+ DW_TAG_namespace DIEs with a name of "::" for the global namespace.
+ Work around this problem here. */
+ if (cu->language == language_cplus
+ && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0)
+ return "";
+ /* We give a name to even anonymous namespaces. */
+ return TYPE_TAG_NAME (parent_type);
+ case DW_TAG_class_type:
+ case DW_TAG_interface_type:
+ case DW_TAG_structure_type:
+ case DW_TAG_union_type:
+ case DW_TAG_module:
+ parent_type = read_type_die (parent, cu);
+ if (TYPE_TAG_NAME (parent_type) != NULL)
+ return TYPE_TAG_NAME (parent_type);
+ else
+ /* An anonymous structure is only allowed non-static data
+ members; no typedefs, no member functions, et cetera.
+ So it does not need a prefix. */
+ return "";
+ case DW_TAG_compile_unit:
+ /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
+ if (cu->language == language_cplus
+ && dwarf2_per_objfile->types.asection != NULL
+ && die->child != NULL
+ && (die->tag == DW_TAG_class_type
+ || die->tag == DW_TAG_structure_type
+ || die->tag == DW_TAG_union_type))
+ {
+ char *name = guess_full_die_structure_name (die, cu);
+ if (name != NULL)
+ return name;
+ }
+ return "";
+ default:
+ return determine_prefix (parent, cu);
+ }
+}
+
+/* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
+ with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
+ simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
+ an obconcat, otherwise allocate storage for the result. The CU argument is
+ used to determine the language and hence, the appropriate separator. */
+
+#define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
+
+static char *
+typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
+ int physname, struct dwarf2_cu *cu)
+{
+ const char *lead = "";
+ const char *sep;
+
+ if (suffix == NULL || suffix[0] == '\0'
+ || prefix == NULL || prefix[0] == '\0')
+ sep = "";
+ else if (cu->language == language_java)
+ sep = ".";
+ else if (cu->language == language_fortran && physname)
+ {
+ /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
+ DW_AT_MIPS_linkage_name is preferred and used instead. */
+
+ lead = "__";
+ sep = "_MOD_";
+ }
+ else
+ sep = "::";
+
+ if (prefix == NULL)
+ prefix = "";
+ if (suffix == NULL)
+ suffix = "";
+
+ if (obs == NULL)
+ {
+ char *retval
+ = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
+
+ strcpy (retval, lead);
+ strcat (retval, prefix);
+ strcat (retval, sep);
+ strcat (retval, suffix);
+ return retval;
+ }
+ else
+ {
+ /* We have an obstack. */
+ return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL);
+ }
+}
+
+/* Return sibling of die, NULL if no sibling. */
+
+static struct die_info *
+sibling_die (struct die_info *die)
+{
+ return die->sibling;
+}
+
+/* Get name of a die, return NULL if not found. */
+
+static char *
+dwarf2_canonicalize_name (char *name, struct dwarf2_cu *cu,
+ struct obstack *obstack)
+{
+ if (name && cu->language == language_cplus)
+ {
+ char *canon_name = cp_canonicalize_string (name);
+
+ if (canon_name != NULL)
+ {
+ if (strcmp (canon_name, name) != 0)
+ name = obsavestring (canon_name, strlen (canon_name),
+ obstack);
+ xfree (canon_name);
+ }
+ }
+
+ return name;
+}
+
+/* Get name of a die, return NULL if not found. */
+
+static char *
+dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct attribute *attr;
+
+ attr = dwarf2_attr (die, DW_AT_name, cu);
+ if (!attr || !DW_STRING (attr))
+ return NULL;
+
+ switch (die->tag)
+ {
+ case DW_TAG_compile_unit:
+ /* Compilation units have a DW_AT_name that is a filename, not
+ a source language identifier. */
+ case DW_TAG_enumeration_type:
+ case DW_TAG_enumerator:
+ /* These tags always have simple identifiers already; no need
+ to canonicalize them. */
+ return DW_STRING (attr);
+
+ case DW_TAG_subprogram:
+ /* Java constructors will all be named "<init>", so return
+ the class name when we see this special case. */
+ if (cu->language == language_java
+ && DW_STRING (attr) != NULL
+ && strcmp (DW_STRING (attr), "<init>") == 0)
+ {
+ struct dwarf2_cu *spec_cu = cu;
+ struct die_info *spec_die;
+
+ /* GCJ will output '<init>' for Java constructor names.
+ For this special case, return the name of the parent class. */
+
+ /* GCJ may output suprogram DIEs with AT_specification set.
+ If so, use the name of the specified DIE. */
+ spec_die = die_specification (die, &spec_cu);
+ if (spec_die != NULL)
+ return dwarf2_name (spec_die, spec_cu);
+
+ do
+ {
+ die = die->parent;
+ if (die->tag == DW_TAG_class_type)
+ return dwarf2_name (die, cu);
+ }
+ while (die->tag != DW_TAG_compile_unit);
+ }
+ break;
+
+ case DW_TAG_class_type:
+ case DW_TAG_interface_type:
+ case DW_TAG_structure_type:
+ case DW_TAG_union_type:
+ /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
+ structures or unions. These were of the form "._%d" in GCC 4.1,
+ or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
+ and GCC 4.4. We work around this problem by ignoring these. */
+ if (strncmp (DW_STRING (attr), "._", 2) == 0
+ || strncmp (DW_STRING (attr), "<anonymous", 10) == 0)
+ return NULL;
+ break;
+
+ default:
+ break;
+ }
+
+ if (!DW_STRING_IS_CANONICAL (attr))
+ {
+ DW_STRING (attr)
+ = dwarf2_canonicalize_name (DW_STRING (attr), cu,
+ &cu->objfile->objfile_obstack);
+ DW_STRING_IS_CANONICAL (attr) = 1;
+ }
+ return DW_STRING (attr);
+}
+
+/* Return the die that this die in an extension of, or NULL if there
+ is none. *EXT_CU is the CU containing DIE on input, and the CU
+ containing the return value on output. */
+
+static struct die_info *
+dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu)
+{
+ struct attribute *attr;
+
+ attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
+ if (attr == NULL)
+ return NULL;
+
+ return follow_die_ref (die, attr, ext_cu);
+}
+
+/* Convert a DIE tag into its string name. */
+
+static char *
+dwarf_tag_name (unsigned tag)
+{
+ switch (tag)
+ {
+ case DW_TAG_padding:
+ return "DW_TAG_padding";
+ case DW_TAG_array_type:
+ return "DW_TAG_array_type";
+ case DW_TAG_class_type:
+ return "DW_TAG_class_type";
+ case DW_TAG_entry_point:
+ return "DW_TAG_entry_point";
+ case DW_TAG_enumeration_type:
+ return "DW_TAG_enumeration_type";
+ case DW_TAG_formal_parameter:
+ return "DW_TAG_formal_parameter";
+ case DW_TAG_imported_declaration:
+ return "DW_TAG_imported_declaration";
+ case DW_TAG_label:
+ return "DW_TAG_label";
+ case DW_TAG_lexical_block:
+ return "DW_TAG_lexical_block";
+ case DW_TAG_member:
+ return "DW_TAG_member";
+ case DW_TAG_pointer_type:
+ return "DW_TAG_pointer_type";
+ case DW_TAG_reference_type:
+ return "DW_TAG_reference_type";
+ case DW_TAG_compile_unit:
+ return "DW_TAG_compile_unit";
+ case DW_TAG_string_type:
+ return "DW_TAG_string_type";
+ case DW_TAG_structure_type:
+ return "DW_TAG_structure_type";
+ case DW_TAG_subroutine_type:
+ return "DW_TAG_subroutine_type";
+ case DW_TAG_typedef:
+ return "DW_TAG_typedef";
+ case DW_TAG_union_type:
+ return "DW_TAG_union_type";
+ case DW_TAG_unspecified_parameters:
+ return "DW_TAG_unspecified_parameters";
+ case DW_TAG_variant:
+ return "DW_TAG_variant";
+ case DW_TAG_common_block:
+ return "DW_TAG_common_block";
+ case DW_TAG_common_inclusion:
+ return "DW_TAG_common_inclusion";
+ case DW_TAG_inheritance:
+ return "DW_TAG_inheritance";
+ case DW_TAG_inlined_subroutine:
+ return "DW_TAG_inlined_subroutine";
+ case DW_TAG_module:
+ return "DW_TAG_module";
+ case DW_TAG_ptr_to_member_type:
+ return "DW_TAG_ptr_to_member_type";
+ case DW_TAG_set_type:
+ return "DW_TAG_set_type";
+ case DW_TAG_subrange_type:
+ return "DW_TAG_subrange_type";
+ case DW_TAG_with_stmt:
+ return "DW_TAG_with_stmt";
+ case DW_TAG_access_declaration:
+ return "DW_TAG_access_declaration";
+ case DW_TAG_base_type:
+ return "DW_TAG_base_type";
+ case DW_TAG_catch_block:
+ return "DW_TAG_catch_block";
+ case DW_TAG_const_type:
+ return "DW_TAG_const_type";
+ case DW_TAG_constant:
+ return "DW_TAG_constant";
+ case DW_TAG_enumerator:
+ return "DW_TAG_enumerator";
+ case DW_TAG_file_type:
+ return "DW_TAG_file_type";
+ case DW_TAG_friend:
+ return "DW_TAG_friend";
+ case DW_TAG_namelist:
+ return "DW_TAG_namelist";
+ case DW_TAG_namelist_item:
+ return "DW_TAG_namelist_item";
+ case DW_TAG_packed_type:
+ return "DW_TAG_packed_type";
+ case DW_TAG_subprogram:
+ return "DW_TAG_subprogram";
+ case DW_TAG_template_type_param:
+ return "DW_TAG_template_type_param";
+ case DW_TAG_template_value_param:
+ return "DW_TAG_template_value_param";
+ case DW_TAG_thrown_type:
+ return "DW_TAG_thrown_type";
+ case DW_TAG_try_block:
+ return "DW_TAG_try_block";
+ case DW_TAG_variant_part:
+ return "DW_TAG_variant_part";
+ case DW_TAG_variable:
+ return "DW_TAG_variable";
+ case DW_TAG_volatile_type:
+ return "DW_TAG_volatile_type";
+ case DW_TAG_dwarf_procedure:
+ return "DW_TAG_dwarf_procedure";
+ case DW_TAG_restrict_type:
+ return "DW_TAG_restrict_type";
+ case DW_TAG_interface_type:
+ return "DW_TAG_interface_type";
+ case DW_TAG_namespace:
+ return "DW_TAG_namespace";
+ case DW_TAG_imported_module:
+ return "DW_TAG_imported_module";
+ case DW_TAG_unspecified_type:
+ return "DW_TAG_unspecified_type";
+ case DW_TAG_partial_unit:
+ return "DW_TAG_partial_unit";
+ case DW_TAG_imported_unit:
+ return "DW_TAG_imported_unit";
+ case DW_TAG_condition:
+ return "DW_TAG_condition";
+ case DW_TAG_shared_type:
+ return "DW_TAG_shared_type";
+ case DW_TAG_type_unit:
+ return "DW_TAG_type_unit";
+ case DW_TAG_MIPS_loop:
+ return "DW_TAG_MIPS_loop";
+ case DW_TAG_HP_array_descriptor:
+ return "DW_TAG_HP_array_descriptor";
+ case DW_TAG_format_label:
+ return "DW_TAG_format_label";
+ case DW_TAG_function_template:
+ return "DW_TAG_function_template";
+ case DW_TAG_class_template:
+ return "DW_TAG_class_template";
+ case DW_TAG_GNU_BINCL:
+ return "DW_TAG_GNU_BINCL";
+ case DW_TAG_GNU_EINCL:
+ return "DW_TAG_GNU_EINCL";
+ case DW_TAG_upc_shared_type:
+ return "DW_TAG_upc_shared_type";
+ case DW_TAG_upc_strict_type:
+ return "DW_TAG_upc_strict_type";
+ case DW_TAG_upc_relaxed_type:
+ return "DW_TAG_upc_relaxed_type";
+ case DW_TAG_PGI_kanji_type:
+ return "DW_TAG_PGI_kanji_type";
+ case DW_TAG_PGI_interface_block:
+ return "DW_TAG_PGI_interface_block";
+ default:
+ return "DW_TAG_<unknown>";
+ }
+}
+
+/* Convert a DWARF attribute code into its string name. */
+
+static char *
+dwarf_attr_name (unsigned attr)
+{
+ switch (attr)
+ {
+ case DW_AT_sibling:
+ return "DW_AT_sibling";
+ case DW_AT_location:
+ return "DW_AT_location";
+ case DW_AT_name:
+ return "DW_AT_name";
+ case DW_AT_ordering:
+ return "DW_AT_ordering";
+ case DW_AT_subscr_data:
+ return "DW_AT_subscr_data";
+ case DW_AT_byte_size:
+ return "DW_AT_byte_size";
+ case DW_AT_bit_offset:
+ return "DW_AT_bit_offset";
+ case DW_AT_bit_size:
+ return "DW_AT_bit_size";
+ case DW_AT_element_list:
+ return "DW_AT_element_list";
+ case DW_AT_stmt_list:
+ return "DW_AT_stmt_list";
+ case DW_AT_low_pc:
+ return "DW_AT_low_pc";
+ case DW_AT_high_pc:
+ return "DW_AT_high_pc";
+ case DW_AT_language:
+ return "DW_AT_language";
+ case DW_AT_member:
+ return "DW_AT_member";
+ case DW_AT_discr:
+ return "DW_AT_discr";
+ case DW_AT_discr_value:
+ return "DW_AT_discr_value";
+ case DW_AT_visibility:
+ return "DW_AT_visibility";
+ case DW_AT_import:
+ return "DW_AT_import";
+ case DW_AT_string_length:
+ return "DW_AT_string_length";
+ case DW_AT_common_reference:
+ return "DW_AT_common_reference";
+ case DW_AT_comp_dir:
+ return "DW_AT_comp_dir";
+ case DW_AT_const_value:
+ return "DW_AT_const_value";
+ case DW_AT_containing_type:
+ return "DW_AT_containing_type";
+ case DW_AT_default_value:
+ return "DW_AT_default_value";
+ case DW_AT_inline:
+ return "DW_AT_inline";
+ case DW_AT_is_optional:
+ return "DW_AT_is_optional";
+ case DW_AT_lower_bound:
+ return "DW_AT_lower_bound";
+ case DW_AT_producer:
+ return "DW_AT_producer";
+ case DW_AT_prototyped:
+ return "DW_AT_prototyped";
+ case DW_AT_return_addr:
+ return "DW_AT_return_addr";
+ case DW_AT_start_scope:
+ return "DW_AT_start_scope";
+ case DW_AT_bit_stride:
+ return "DW_AT_bit_stride";
+ case DW_AT_upper_bound:
+ return "DW_AT_upper_bound";
+ case DW_AT_abstract_origin:
+ return "DW_AT_abstract_origin";
+ case DW_AT_accessibility:
+ return "DW_AT_accessibility";
+ case DW_AT_address_class:
+ return "DW_AT_address_class";
+ case DW_AT_artificial:
+ return "DW_AT_artificial";
+ case DW_AT_base_types:
+ return "DW_AT_base_types";
+ case DW_AT_calling_convention:
+ return "DW_AT_calling_convention";
+ case DW_AT_count:
+ return "DW_AT_count";
+ case DW_AT_data_member_location:
+ return "DW_AT_data_member_location";
+ case DW_AT_decl_column:
+ return "DW_AT_decl_column";
+ case DW_AT_decl_file:
+ return "DW_AT_decl_file";
+ case DW_AT_decl_line:
+ return "DW_AT_decl_line";
+ case DW_AT_declaration:
+ return "DW_AT_declaration";
+ case DW_AT_discr_list:
+ return "DW_AT_discr_list";
+ case DW_AT_encoding:
+ return "DW_AT_encoding";
+ case DW_AT_external:
+ return "DW_AT_external";
+ case DW_AT_frame_base:
+ return "DW_AT_frame_base";
+ case DW_AT_friend:
+ return "DW_AT_friend";
+ case DW_AT_identifier_case:
+ return "DW_AT_identifier_case";
+ case DW_AT_macro_info:
+ return "DW_AT_macro_info";
+ case DW_AT_namelist_items:
+ return "DW_AT_namelist_items";
+ case DW_AT_priority:
+ return "DW_AT_priority";
+ case DW_AT_segment:
+ return "DW_AT_segment";
+ case DW_AT_specification:
+ return "DW_AT_specification";
+ case DW_AT_static_link:
+ return "DW_AT_static_link";
+ case DW_AT_type:
+ return "DW_AT_type";
+ case DW_AT_use_location:
+ return "DW_AT_use_location";
+ case DW_AT_variable_parameter:
+ return "DW_AT_variable_parameter";
+ case DW_AT_virtuality:
+ return "DW_AT_virtuality";
+ case DW_AT_vtable_elem_location:
+ return "DW_AT_vtable_elem_location";
+ /* DWARF 3 values. */
+ case DW_AT_allocated:
+ return "DW_AT_allocated";
+ case DW_AT_associated:
+ return "DW_AT_associated";
+ case DW_AT_data_location:
+ return "DW_AT_data_location";
+ case DW_AT_byte_stride:
+ return "DW_AT_byte_stride";
+ case DW_AT_entry_pc:
+ return "DW_AT_entry_pc";
+ case DW_AT_use_UTF8:
+ return "DW_AT_use_UTF8";
+ case DW_AT_extension:
+ return "DW_AT_extension";
+ case DW_AT_ranges:
+ return "DW_AT_ranges";
+ case DW_AT_trampoline:
+ return "DW_AT_trampoline";
+ case DW_AT_call_column:
+ return "DW_AT_call_column";
+ case DW_AT_call_file:
+ return "DW_AT_call_file";
+ case DW_AT_call_line:
+ return "DW_AT_call_line";
+ case DW_AT_description:
+ return "DW_AT_description";
+ case DW_AT_binary_scale:
+ return "DW_AT_binary_scale";
+ case DW_AT_decimal_scale:
+ return "DW_AT_decimal_scale";
+ case DW_AT_small:
+ return "DW_AT_small";
+ case DW_AT_decimal_sign:
+ return "DW_AT_decimal_sign";
+ case DW_AT_digit_count:
+ return "DW_AT_digit_count";
+ case DW_AT_picture_string:
+ return "DW_AT_picture_string";
+ case DW_AT_mutable:
+ return "DW_AT_mutable";
+ case DW_AT_threads_scaled:
+ return "DW_AT_threads_scaled";
+ case DW_AT_explicit:
+ return "DW_AT_explicit";
+ case DW_AT_object_pointer:
+ return "DW_AT_object_pointer";
+ case DW_AT_endianity:
+ return "DW_AT_endianity";
+ case DW_AT_elemental:
+ return "DW_AT_elemental";
+ case DW_AT_pure:
+ return "DW_AT_pure";
+ case DW_AT_recursive:
+ return "DW_AT_recursive";
+ /* DWARF 4 values. */
+ case DW_AT_signature:
+ return "DW_AT_signature";
+ case DW_AT_linkage_name:
+ return "DW_AT_linkage_name";
+ /* SGI/MIPS extensions. */
+#ifdef MIPS /* collides with DW_AT_HP_block_index */
+ case DW_AT_MIPS_fde:
+ return "DW_AT_MIPS_fde";
+#endif
+ case DW_AT_MIPS_loop_begin:
+ return "DW_AT_MIPS_loop_begin";
+ case DW_AT_MIPS_tail_loop_begin:
+ return "DW_AT_MIPS_tail_loop_begin";
+ case DW_AT_MIPS_epilog_begin:
+ return "DW_AT_MIPS_epilog_begin";
+ case DW_AT_MIPS_loop_unroll_factor:
+ return "DW_AT_MIPS_loop_unroll_factor";
+ case DW_AT_MIPS_software_pipeline_depth:
+ return "DW_AT_MIPS_software_pipeline_depth";
+ case DW_AT_MIPS_linkage_name:
+ return "DW_AT_MIPS_linkage_name";
+ case DW_AT_MIPS_stride:
+ return "DW_AT_MIPS_stride";
+ case DW_AT_MIPS_abstract_name:
+ return "DW_AT_MIPS_abstract_name";
+ case DW_AT_MIPS_clone_origin:
+ return "DW_AT_MIPS_clone_origin";
+ case DW_AT_MIPS_has_inlines:
+ return "DW_AT_MIPS_has_inlines";
+ /* HP extensions. */
+#ifndef MIPS /* collides with DW_AT_MIPS_fde */
+ case DW_AT_HP_block_index:
+ return "DW_AT_HP_block_index";
+#endif
+ case DW_AT_HP_unmodifiable:
+ return "DW_AT_HP_unmodifiable";
+ case DW_AT_HP_actuals_stmt_list:
+ return "DW_AT_HP_actuals_stmt_list";
+ case DW_AT_HP_proc_per_section:
+ return "DW_AT_HP_proc_per_section";
+ case DW_AT_HP_raw_data_ptr:
+ return "DW_AT_HP_raw_data_ptr";
+ case DW_AT_HP_pass_by_reference:
+ return "DW_AT_HP_pass_by_reference";
+ case DW_AT_HP_opt_level:
+ return "DW_AT_HP_opt_level";
+ case DW_AT_HP_prof_version_id:
+ return "DW_AT_HP_prof_version_id";
+ case DW_AT_HP_opt_flags:
+ return "DW_AT_HP_opt_flags";
+ case DW_AT_HP_cold_region_low_pc:
+ return "DW_AT_HP_cold_region_low_pc";
+ case DW_AT_HP_cold_region_high_pc:
+ return "DW_AT_HP_cold_region_high_pc";
+ case DW_AT_HP_all_variables_modifiable:
+ return "DW_AT_HP_all_variables_modifiable";
+ case DW_AT_HP_linkage_name:
+ return "DW_AT_HP_linkage_name";
+ case DW_AT_HP_prof_flags:
+ return "DW_AT_HP_prof_flags";
+ /* GNU extensions. */
+ case DW_AT_sf_names:
+ return "DW_AT_sf_names";
+ case DW_AT_src_info:
+ return "DW_AT_src_info";
+ case DW_AT_mac_info:
+ return "DW_AT_mac_info";
+ case DW_AT_src_coords:
+ return "DW_AT_src_coords";
+ case DW_AT_body_begin:
+ return "DW_AT_body_begin";
+ case DW_AT_body_end:
+ return "DW_AT_body_end";
+ case DW_AT_GNU_vector:
+ return "DW_AT_GNU_vector";
+ case DW_AT_GNU_odr_signature:
+ return "DW_AT_GNU_odr_signature";
+ /* VMS extensions. */
+ case DW_AT_VMS_rtnbeg_pd_address:
+ return "DW_AT_VMS_rtnbeg_pd_address";
+ /* UPC extension. */
+ case DW_AT_upc_threads_scaled:
+ return "DW_AT_upc_threads_scaled";
+ /* PGI (STMicroelectronics) extensions. */
+ case DW_AT_PGI_lbase:
+ return "DW_AT_PGI_lbase";
+ case DW_AT_PGI_soffset:
+ return "DW_AT_PGI_soffset";
+ case DW_AT_PGI_lstride:
+ return "DW_AT_PGI_lstride";
+ default:
+ return "DW_AT_<unknown>";
+ }
+}
+
+/* Convert a DWARF value form code into its string name. */
+
+static char *
+dwarf_form_name (unsigned form)
+{
+ switch (form)
+ {
+ case DW_FORM_addr:
+ return "DW_FORM_addr";
+ case DW_FORM_block2:
+ return "DW_FORM_block2";
+ case DW_FORM_block4:
+ return "DW_FORM_block4";
+ case DW_FORM_data2:
+ return "DW_FORM_data2";
+ case DW_FORM_data4:
+ return "DW_FORM_data4";
+ case DW_FORM_data8:
+ return "DW_FORM_data8";
+ case DW_FORM_string:
+ return "DW_FORM_string";
+ case DW_FORM_block:
+ return "DW_FORM_block";
+ case DW_FORM_block1:
+ return "DW_FORM_block1";
+ case DW_FORM_data1:
+ return "DW_FORM_data1";
+ case DW_FORM_flag:
+ return "DW_FORM_flag";
+ case DW_FORM_sdata:
+ return "DW_FORM_sdata";
+ case DW_FORM_strp:
+ return "DW_FORM_strp";
+ case DW_FORM_udata:
+ return "DW_FORM_udata";
+ case DW_FORM_ref_addr:
+ return "DW_FORM_ref_addr";
+ case DW_FORM_ref1:
+ return "DW_FORM_ref1";
+ case DW_FORM_ref2:
+ return "DW_FORM_ref2";
+ case DW_FORM_ref4:
+ return "DW_FORM_ref4";
+ case DW_FORM_ref8:
+ return "DW_FORM_ref8";
+ case DW_FORM_ref_udata:
+ return "DW_FORM_ref_udata";
+ case DW_FORM_indirect:
+ return "DW_FORM_indirect";
+ case DW_FORM_sec_offset:
+ return "DW_FORM_sec_offset";
+ case DW_FORM_exprloc:
+ return "DW_FORM_exprloc";
+ case DW_FORM_flag_present:
+ return "DW_FORM_flag_present";
+ case DW_FORM_sig8:
+ return "DW_FORM_sig8";
+ default:
+ return "DW_FORM_<unknown>";
+ }
+}
+
+/* Convert a DWARF stack opcode into its string name. */
+
+const char *
+dwarf_stack_op_name (unsigned op)
+{
+ switch (op)
+ {
+ case DW_OP_addr:
+ return "DW_OP_addr";
+ case DW_OP_deref:
+ return "DW_OP_deref";
+ case DW_OP_const1u:
return "DW_OP_const1u";
case DW_OP_const1s:
return "DW_OP_const1s";
return "DW_OP_GNU_push_tls_address";
case DW_OP_GNU_uninit:
return "DW_OP_GNU_uninit";
+ case DW_OP_GNU_implicit_pointer:
+ return "DW_OP_GNU_implicit_pointer";
+ default:
+ return NULL;
+ }
+}
+
+static char *
+dwarf_bool_name (unsigned mybool)
+{
+ if (mybool)
+ return "TRUE";
+ else
+ return "FALSE";
+}
+
+/* Convert a DWARF type code into its string name. */
+
+static char *
+dwarf_type_encoding_name (unsigned enc)
+{
+ switch (enc)
+ {
+ case DW_ATE_void:
+ return "DW_ATE_void";
+ case DW_ATE_address:
+ return "DW_ATE_address";
+ case DW_ATE_boolean:
+ return "DW_ATE_boolean";
+ case DW_ATE_complex_float:
+ return "DW_ATE_complex_float";
+ case DW_ATE_float:
+ return "DW_ATE_float";
+ case DW_ATE_signed:
+ return "DW_ATE_signed";
+ case DW_ATE_signed_char:
+ return "DW_ATE_signed_char";
+ case DW_ATE_unsigned:
+ return "DW_ATE_unsigned";
+ case DW_ATE_unsigned_char:
+ return "DW_ATE_unsigned_char";
+ /* DWARF 3. */
+ case DW_ATE_imaginary_float:
+ return "DW_ATE_imaginary_float";
+ case DW_ATE_packed_decimal:
+ return "DW_ATE_packed_decimal";
+ case DW_ATE_numeric_string:
+ return "DW_ATE_numeric_string";
+ case DW_ATE_edited:
+ return "DW_ATE_edited";
+ case DW_ATE_signed_fixed:
+ return "DW_ATE_signed_fixed";
+ case DW_ATE_unsigned_fixed:
+ return "DW_ATE_unsigned_fixed";
+ case DW_ATE_decimal_float:
+ return "DW_ATE_decimal_float";
+ /* DWARF 4. */
+ case DW_ATE_UTF:
+ return "DW_ATE_UTF";
+ /* HP extensions. */
+ case DW_ATE_HP_float80:
+ return "DW_ATE_HP_float80";
+ case DW_ATE_HP_complex_float80:
+ return "DW_ATE_HP_complex_float80";
+ case DW_ATE_HP_float128:
+ return "DW_ATE_HP_float128";
+ case DW_ATE_HP_complex_float128:
+ return "DW_ATE_HP_complex_float128";
+ case DW_ATE_HP_floathpintel:
+ return "DW_ATE_HP_floathpintel";
+ case DW_ATE_HP_imaginary_float80:
+ return "DW_ATE_HP_imaginary_float80";
+ case DW_ATE_HP_imaginary_float128:
+ return "DW_ATE_HP_imaginary_float128";
+ default:
+ return "DW_ATE_<unknown>";
+ }
+}
+
+/* Convert a DWARF call frame info operation to its string name. */
+
+#if 0
+static char *
+dwarf_cfi_name (unsigned cfi_opc)
+{
+ switch (cfi_opc)
+ {
+ case DW_CFA_advance_loc:
+ return "DW_CFA_advance_loc";
+ case DW_CFA_offset:
+ return "DW_CFA_offset";
+ case DW_CFA_restore:
+ return "DW_CFA_restore";
+ case DW_CFA_nop:
+ return "DW_CFA_nop";
+ case DW_CFA_set_loc:
+ return "DW_CFA_set_loc";
+ case DW_CFA_advance_loc1:
+ return "DW_CFA_advance_loc1";
+ case DW_CFA_advance_loc2:
+ return "DW_CFA_advance_loc2";
+ case DW_CFA_advance_loc4:
+ return "DW_CFA_advance_loc4";
+ case DW_CFA_offset_extended:
+ return "DW_CFA_offset_extended";
+ case DW_CFA_restore_extended:
+ return "DW_CFA_restore_extended";
+ case DW_CFA_undefined:
+ return "DW_CFA_undefined";
+ case DW_CFA_same_value:
+ return "DW_CFA_same_value";
+ case DW_CFA_register:
+ return "DW_CFA_register";
+ case DW_CFA_remember_state:
+ return "DW_CFA_remember_state";
+ case DW_CFA_restore_state:
+ return "DW_CFA_restore_state";
+ case DW_CFA_def_cfa:
+ return "DW_CFA_def_cfa";
+ case DW_CFA_def_cfa_register:
+ return "DW_CFA_def_cfa_register";
+ case DW_CFA_def_cfa_offset:
+ return "DW_CFA_def_cfa_offset";
+ /* DWARF 3. */
+ case DW_CFA_def_cfa_expression:
+ return "DW_CFA_def_cfa_expression";
+ case DW_CFA_expression:
+ return "DW_CFA_expression";
+ case DW_CFA_offset_extended_sf:
+ return "DW_CFA_offset_extended_sf";
+ case DW_CFA_def_cfa_sf:
+ return "DW_CFA_def_cfa_sf";
+ case DW_CFA_def_cfa_offset_sf:
+ return "DW_CFA_def_cfa_offset_sf";
+ case DW_CFA_val_offset:
+ return "DW_CFA_val_offset";
+ case DW_CFA_val_offset_sf:
+ return "DW_CFA_val_offset_sf";
+ case DW_CFA_val_expression:
+ return "DW_CFA_val_expression";
+ /* SGI/MIPS specific. */
+ case DW_CFA_MIPS_advance_loc8:
+ return "DW_CFA_MIPS_advance_loc8";
+ /* GNU extensions. */
+ case DW_CFA_GNU_window_save:
+ return "DW_CFA_GNU_window_save";
+ case DW_CFA_GNU_args_size:
+ return "DW_CFA_GNU_args_size";
+ case DW_CFA_GNU_negative_offset_extended:
+ return "DW_CFA_GNU_negative_offset_extended";
+ default:
+ return "DW_CFA_<unknown>";
+ }
+}
+#endif
+
+static void
+dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
+{
+ unsigned int i;
+
+ print_spaces (indent, f);
+ fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n",
+ dwarf_tag_name (die->tag), die->abbrev, die->offset);
+
+ if (die->parent != NULL)
+ {
+ print_spaces (indent, f);
+ fprintf_unfiltered (f, " parent at offset: 0x%x\n",
+ die->parent->offset);
+ }
+
+ print_spaces (indent, f);
+ fprintf_unfiltered (f, " has children: %s\n",
+ dwarf_bool_name (die->child != NULL));
+
+ print_spaces (indent, f);
+ fprintf_unfiltered (f, " attributes:\n");
+
+ for (i = 0; i < die->num_attrs; ++i)
+ {
+ print_spaces (indent, f);
+ fprintf_unfiltered (f, " %s (%s) ",
+ dwarf_attr_name (die->attrs[i].name),
+ dwarf_form_name (die->attrs[i].form));
+
+ switch (die->attrs[i].form)
+ {
+ case DW_FORM_ref_addr:
+ case DW_FORM_addr:
+ fprintf_unfiltered (f, "address: ");
+ fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f);
+ break;
+ case DW_FORM_block2:
+ case DW_FORM_block4:
+ case DW_FORM_block:
+ case DW_FORM_block1:
+ fprintf_unfiltered (f, "block: size %d",
+ DW_BLOCK (&die->attrs[i])->size);
+ break;
+ case DW_FORM_exprloc:
+ fprintf_unfiltered (f, "expression: size %u",
+ DW_BLOCK (&die->attrs[i])->size);
+ break;
+ case DW_FORM_ref1:
+ case DW_FORM_ref2:
+ case DW_FORM_ref4:
+ fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)",
+ (long) (DW_ADDR (&die->attrs[i])));
+ break;
+ case DW_FORM_data1:
+ case DW_FORM_data2:
+ case DW_FORM_data4:
+ case DW_FORM_data8:
+ case DW_FORM_udata:
+ case DW_FORM_sdata:
+ fprintf_unfiltered (f, "constant: %s",
+ pulongest (DW_UNSND (&die->attrs[i])));
+ break;
+ case DW_FORM_sec_offset:
+ fprintf_unfiltered (f, "section offset: %s",
+ pulongest (DW_UNSND (&die->attrs[i])));
+ break;
+ case DW_FORM_sig8:
+ if (DW_SIGNATURED_TYPE (&die->attrs[i]) != NULL)
+ fprintf_unfiltered (f, "signatured type, offset: 0x%x",
+ DW_SIGNATURED_TYPE (&die->attrs[i])->offset);
+ else
+ fprintf_unfiltered (f, "signatured type, offset: unknown");
+ break;
+ case DW_FORM_string:
+ case DW_FORM_strp:
+ fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)",
+ DW_STRING (&die->attrs[i])
+ ? DW_STRING (&die->attrs[i]) : "",
+ DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not");
+ break;
+ case DW_FORM_flag:
+ if (DW_UNSND (&die->attrs[i]))
+ fprintf_unfiltered (f, "flag: TRUE");
+ else
+ fprintf_unfiltered (f, "flag: FALSE");
+ break;
+ case DW_FORM_flag_present:
+ fprintf_unfiltered (f, "flag: TRUE");
+ break;
+ case DW_FORM_indirect:
+ /* The reader will have reduced the indirect form to
+ the "base form" so this form should not occur. */
+ fprintf_unfiltered (f,
+ "unexpected attribute form: DW_FORM_indirect");
+ break;
+ default:
+ fprintf_unfiltered (f, "unsupported attribute form: %d.",
+ die->attrs[i].form);
+ break;
+ }
+ fprintf_unfiltered (f, "\n");
+ }
+}
+
+static void
+dump_die_for_error (struct die_info *die)
+{
+ dump_die_shallow (gdb_stderr, 0, die);
+}
+
+static void
+dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die)
+{
+ int indent = level * 4;
+
+ gdb_assert (die != NULL);
+
+ if (level >= max_level)
+ return;
+
+ dump_die_shallow (f, indent, die);
+
+ if (die->child != NULL)
+ {
+ print_spaces (indent, f);
+ fprintf_unfiltered (f, " Children:");
+ if (level + 1 < max_level)
+ {
+ fprintf_unfiltered (f, "\n");
+ dump_die_1 (f, level + 1, max_level, die->child);
+ }
+ else
+ {
+ fprintf_unfiltered (f,
+ " [not printed, max nesting level reached]\n");
+ }
+ }
+
+ if (die->sibling != NULL && level > 0)
+ {
+ dump_die_1 (f, level, max_level, die->sibling);
+ }
+}
+
+/* This is called from the pdie macro in gdbinit.in.
+ It's not static so gcc will keep a copy callable from gdb. */
+
+void
+dump_die (struct die_info *die, int max_level)
+{
+ dump_die_1 (gdb_stdlog, 0, max_level, die);
+}
+
+static void
+store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu)
+{
+ void **slot;
+
+ slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset, INSERT);
+
+ *slot = die;
+}
+
+static int
+is_ref_attr (struct attribute *attr)
+{
+ switch (attr->form)
+ {
+ case DW_FORM_ref_addr:
+ case DW_FORM_ref1:
+ case DW_FORM_ref2:
+ case DW_FORM_ref4:
+ case DW_FORM_ref8:
+ case DW_FORM_ref_udata:
+ return 1;
default:
- return def ? "OP_<unknown>" : NULL;
+ return 0;
+ }
+}
+
+static unsigned int
+dwarf2_get_ref_die_offset (struct attribute *attr)
+{
+ if (is_ref_attr (attr))
+ return DW_ADDR (attr);
+
+ complaint (&symfile_complaints,
+ _("unsupported die ref attribute form: '%s'"),
+ dwarf_form_name (attr->form));
+ return 0;
+}
+
+/* Return the constant value held by ATTR. Return DEFAULT_VALUE if
+ * the value held by the attribute is not constant. */
+
+static LONGEST
+dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
+{
+ if (attr->form == DW_FORM_sdata)
+ return DW_SND (attr);
+ else if (attr->form == DW_FORM_udata
+ || attr->form == DW_FORM_data1
+ || attr->form == DW_FORM_data2
+ || attr->form == DW_FORM_data4
+ || attr->form == DW_FORM_data8)
+ return DW_UNSND (attr);
+ else
+ {
+ complaint (&symfile_complaints,
+ _("Attribute value is not a constant (%s)"),
+ dwarf_form_name (attr->form));
+ return default_value;
+ }
+}
+
+/* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
+ unit and add it to our queue.
+ The result is non-zero if PER_CU was queued, otherwise the result is zero
+ meaning either PER_CU is already queued or it is already loaded. */
+
+static int
+maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
+ struct dwarf2_per_cu_data *per_cu)
+{
+ /* We may arrive here during partial symbol reading, if we need full
+ DIEs to process an unusual case (e.g. template arguments). Do
+ not queue PER_CU, just tell our caller to load its DIEs. */
+ if (dwarf2_per_objfile->reading_partial_symbols)
+ {
+ if (per_cu->cu == NULL || per_cu->cu->dies == NULL)
+ return 1;
+ return 0;
+ }
+
+ /* Mark the dependence relation so that we don't flush PER_CU
+ too early. */
+ dwarf2_add_dependence (this_cu, per_cu);
+
+ /* If it's already on the queue, we have nothing to do. */
+ if (per_cu->queued)
+ return 0;
+
+ /* If the compilation unit is already loaded, just mark it as
+ used. */
+ if (per_cu->cu != NULL)
+ {
+ per_cu->cu->last_used = 0;
+ return 0;
+ }
+
+ /* Add it to the queue. */
+ queue_comp_unit (per_cu, this_cu->objfile);
+
+ return 1;
+}
+
+/* Follow reference or signature attribute ATTR of SRC_DIE.
+ On entry *REF_CU is the CU of SRC_DIE.
+ On exit *REF_CU is the CU of the result. */
+
+static struct die_info *
+follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr,
+ struct dwarf2_cu **ref_cu)
+{
+ struct die_info *die;
+
+ if (is_ref_attr (attr))
+ die = follow_die_ref (src_die, attr, ref_cu);
+ else if (attr->form == DW_FORM_sig8)
+ die = follow_die_sig (src_die, attr, ref_cu);
+ else
+ {
+ dump_die_for_error (src_die);
+ error (_("Dwarf Error: Expected reference attribute [in module %s]"),
+ (*ref_cu)->objfile->name);
}
+
+ return die;
}
-static char *
-dwarf_bool_name (unsigned mybool)
+/* Follow reference OFFSET.
+ On entry *REF_CU is the CU of the source die referencing OFFSET.
+ On exit *REF_CU is the CU of the result.
+ Returns NULL if OFFSET is invalid. */
+
+static struct die_info *
+follow_die_offset (unsigned int offset, struct dwarf2_cu **ref_cu)
{
- if (mybool)
- return "TRUE";
- else
- return "FALSE";
+ struct die_info temp_die;
+ struct dwarf2_cu *target_cu, *cu = *ref_cu;
+
+ gdb_assert (cu->per_cu != NULL);
+
+ target_cu = cu;
+
+ if (cu->per_cu->from_debug_types)
+ {
+ /* .debug_types CUs cannot reference anything outside their CU.
+ If they need to, they have to reference a signatured type via
+ DW_FORM_sig8. */
+ if (! offset_in_cu_p (&cu->header, offset))
+ return NULL;
+ }
+ else if (! offset_in_cu_p (&cu->header, offset))
+ {
+ struct dwarf2_per_cu_data *per_cu;
+
+ per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
+
+ /* If necessary, add it to the queue and load its DIEs. */
+ if (maybe_queue_comp_unit (cu, per_cu))
+ load_full_comp_unit (per_cu, cu->objfile);
+
+ target_cu = per_cu->cu;
+ }
+ else if (cu->dies == NULL)
+ {
+ /* We're loading full DIEs during partial symbol reading. */
+ gdb_assert (dwarf2_per_objfile->reading_partial_symbols);
+ load_full_comp_unit (cu->per_cu, cu->objfile);
+ }
+
+ *ref_cu = target_cu;
+ temp_die.offset = offset;
+ return htab_find_with_hash (target_cu->die_hash, &temp_die, offset);
}
-/* Convert a DWARF type code into its string name. */
+/* Follow reference attribute ATTR of SRC_DIE.
+ On entry *REF_CU is the CU of SRC_DIE.
+ On exit *REF_CU is the CU of the result. */
-static char *
-dwarf_type_encoding_name (unsigned enc)
+static struct die_info *
+follow_die_ref (struct die_info *src_die, struct attribute *attr,
+ struct dwarf2_cu **ref_cu)
{
- switch (enc)
+ unsigned int offset = dwarf2_get_ref_die_offset (attr);
+ struct dwarf2_cu *cu = *ref_cu;
+ struct die_info *die;
+
+ die = follow_die_offset (offset, ref_cu);
+ if (!die)
+ error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
+ "at 0x%x [in module %s]"),
+ offset, src_die->offset, cu->objfile->name);
+
+ return die;
+}
+
+/* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
+ value is intended for DW_OP_call*. */
+
+struct dwarf2_locexpr_baton
+dwarf2_fetch_die_location_block (unsigned int offset,
+ struct dwarf2_per_cu_data *per_cu,
+ CORE_ADDR (*get_frame_pc) (void *baton),
+ void *baton)
+{
+ struct dwarf2_cu *cu = per_cu->cu;
+ struct die_info *die;
+ struct attribute *attr;
+ struct dwarf2_locexpr_baton retval;
+
+ dw2_setup (per_cu->objfile);
+
+ die = follow_die_offset (offset, &cu);
+ if (!die)
+ error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
+ offset, per_cu->cu->objfile->name);
+
+ attr = dwarf2_attr (die, DW_AT_location, cu);
+ if (!attr)
{
- case DW_ATE_void:
- return "DW_ATE_void";
- case DW_ATE_address:
- return "DW_ATE_address";
- case DW_ATE_boolean:
- return "DW_ATE_boolean";
- case DW_ATE_complex_float:
- return "DW_ATE_complex_float";
- case DW_ATE_float:
- return "DW_ATE_float";
- case DW_ATE_signed:
- return "DW_ATE_signed";
- case DW_ATE_signed_char:
- return "DW_ATE_signed_char";
- case DW_ATE_unsigned:
- return "DW_ATE_unsigned";
- case DW_ATE_unsigned_char:
- return "DW_ATE_unsigned_char";
- /* DWARF 3. */
- case DW_ATE_imaginary_float:
- return "DW_ATE_imaginary_float";
- case DW_ATE_packed_decimal:
- return "DW_ATE_packed_decimal";
- case DW_ATE_numeric_string:
- return "DW_ATE_numeric_string";
- case DW_ATE_edited:
- return "DW_ATE_edited";
- case DW_ATE_signed_fixed:
- return "DW_ATE_signed_fixed";
- case DW_ATE_unsigned_fixed:
- return "DW_ATE_unsigned_fixed";
- case DW_ATE_decimal_float:
- return "DW_ATE_decimal_float";
- /* DWARF 4. */
- case DW_ATE_UTF:
- return "DW_ATE_UTF";
- /* HP extensions. */
- case DW_ATE_HP_float80:
- return "DW_ATE_HP_float80";
- case DW_ATE_HP_complex_float80:
- return "DW_ATE_HP_complex_float80";
- case DW_ATE_HP_float128:
- return "DW_ATE_HP_float128";
- case DW_ATE_HP_complex_float128:
- return "DW_ATE_HP_complex_float128";
- case DW_ATE_HP_floathpintel:
- return "DW_ATE_HP_floathpintel";
- case DW_ATE_HP_imaginary_float80:
- return "DW_ATE_HP_imaginary_float80";
- case DW_ATE_HP_imaginary_float128:
- return "DW_ATE_HP_imaginary_float128";
- default:
- return "DW_ATE_<unknown>";
+ /* DWARF: "If there is no such attribute, then there is no effect.". */
+
+ retval.data = NULL;
+ retval.size = 0;
}
+ else if (attr_form_is_section_offset (attr))
+ {
+ struct dwarf2_loclist_baton loclist_baton;
+ CORE_ADDR pc = (*get_frame_pc) (baton);
+ size_t size;
+
+ fill_in_loclist_baton (cu, &loclist_baton, attr);
+
+ retval.data = dwarf2_find_location_expression (&loclist_baton,
+ &size, pc);
+ retval.size = size;
+ }
+ else
+ {
+ if (!attr_form_is_block (attr))
+ error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
+ "is neither DW_FORM_block* nor DW_FORM_exprloc"),
+ offset, per_cu->cu->objfile->name);
+
+ retval.data = DW_BLOCK (attr)->data;
+ retval.size = DW_BLOCK (attr)->size;
+ }
+ retval.per_cu = cu->per_cu;
+ return retval;
}
-/* Convert a DWARF call frame info operation to its string name. */
+/* Follow the signature attribute ATTR in SRC_DIE.
+ On entry *REF_CU is the CU of SRC_DIE.
+ On exit *REF_CU is the CU of the result. */
-#if 0
-static char *
-dwarf_cfi_name (unsigned cfi_opc)
+static struct die_info *
+follow_die_sig (struct die_info *src_die, struct attribute *attr,
+ struct dwarf2_cu **ref_cu)
{
- switch (cfi_opc)
- {
- case DW_CFA_advance_loc:
- return "DW_CFA_advance_loc";
- case DW_CFA_offset:
- return "DW_CFA_offset";
- case DW_CFA_restore:
- return "DW_CFA_restore";
- case DW_CFA_nop:
- return "DW_CFA_nop";
- case DW_CFA_set_loc:
- return "DW_CFA_set_loc";
- case DW_CFA_advance_loc1:
- return "DW_CFA_advance_loc1";
- case DW_CFA_advance_loc2:
- return "DW_CFA_advance_loc2";
- case DW_CFA_advance_loc4:
- return "DW_CFA_advance_loc4";
- case DW_CFA_offset_extended:
- return "DW_CFA_offset_extended";
- case DW_CFA_restore_extended:
- return "DW_CFA_restore_extended";
- case DW_CFA_undefined:
- return "DW_CFA_undefined";
- case DW_CFA_same_value:
- return "DW_CFA_same_value";
- case DW_CFA_register:
- return "DW_CFA_register";
- case DW_CFA_remember_state:
- return "DW_CFA_remember_state";
- case DW_CFA_restore_state:
- return "DW_CFA_restore_state";
- case DW_CFA_def_cfa:
- return "DW_CFA_def_cfa";
- case DW_CFA_def_cfa_register:
- return "DW_CFA_def_cfa_register";
- case DW_CFA_def_cfa_offset:
- return "DW_CFA_def_cfa_offset";
- /* DWARF 3. */
- case DW_CFA_def_cfa_expression:
- return "DW_CFA_def_cfa_expression";
- case DW_CFA_expression:
- return "DW_CFA_expression";
- case DW_CFA_offset_extended_sf:
- return "DW_CFA_offset_extended_sf";
- case DW_CFA_def_cfa_sf:
- return "DW_CFA_def_cfa_sf";
- case DW_CFA_def_cfa_offset_sf:
- return "DW_CFA_def_cfa_offset_sf";
- case DW_CFA_val_offset:
- return "DW_CFA_val_offset";
- case DW_CFA_val_offset_sf:
- return "DW_CFA_val_offset_sf";
- case DW_CFA_val_expression:
- return "DW_CFA_val_expression";
- /* SGI/MIPS specific. */
- case DW_CFA_MIPS_advance_loc8:
- return "DW_CFA_MIPS_advance_loc8";
- /* GNU extensions. */
- case DW_CFA_GNU_window_save:
- return "DW_CFA_GNU_window_save";
- case DW_CFA_GNU_args_size:
- return "DW_CFA_GNU_args_size";
- case DW_CFA_GNU_negative_offset_extended:
- return "DW_CFA_GNU_negative_offset_extended";
- default:
- return "DW_CFA_<unknown>";
+ struct objfile *objfile = (*ref_cu)->objfile;
+ struct die_info temp_die;
+ struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
+ struct dwarf2_cu *sig_cu;
+ struct die_info *die;
+
+ /* sig_type will be NULL if the signatured type is missing from
+ the debug info. */
+ if (sig_type == NULL)
+ error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
+ "at 0x%x [in module %s]"),
+ src_die->offset, objfile->name);
+
+ /* If necessary, add it to the queue and load its DIEs. */
+
+ if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu))
+ read_signatured_type (objfile, sig_type);
+
+ gdb_assert (sig_type->per_cu.cu != NULL);
+
+ sig_cu = sig_type->per_cu.cu;
+ temp_die.offset = sig_cu->header.offset + sig_type->type_offset;
+ die = htab_find_with_hash (sig_cu->die_hash, &temp_die, temp_die.offset);
+ if (die)
+ {
+ *ref_cu = sig_cu;
+ return die;
}
+
+ error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
+ "from DIE at 0x%x [in module %s]"),
+ sig_type->type_offset, src_die->offset, objfile->name);
+}
+
+/* Given an offset of a signatured type, return its signatured_type. */
+
+static struct signatured_type *
+lookup_signatured_type_at_offset (struct objfile *objfile, unsigned int offset)
+{
+ gdb_byte *info_ptr = dwarf2_per_objfile->types.buffer + offset;
+ unsigned int length, initial_length_size;
+ unsigned int sig_offset;
+ struct signatured_type find_entry, *type_sig;
+
+ length = read_initial_length (objfile->obfd, info_ptr, &initial_length_size);
+ sig_offset = (initial_length_size
+ + 2 /*version*/
+ + (initial_length_size == 4 ? 4 : 8) /*debug_abbrev_offset*/
+ + 1 /*address_size*/);
+ find_entry.signature = bfd_get_64 (objfile->obfd, info_ptr + sig_offset);
+ type_sig = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
+
+ /* This is only used to lookup previously recorded types.
+ If we didn't find it, it's our bug. */
+ gdb_assert (type_sig != NULL);
+ gdb_assert (offset == type_sig->offset);
+
+ return type_sig;
}
-#endif
+
+/* Read in signatured type at OFFSET and build its CU and die(s). */
static void
-dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
+read_signatured_type_at_offset (struct objfile *objfile,
+ unsigned int offset)
{
- unsigned int i;
+ struct signatured_type *type_sig;
- print_spaces (indent, f);
- fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n",
- dwarf_tag_name (die->tag), die->abbrev, die->offset);
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
- if (die->parent != NULL)
- {
- print_spaces (indent, f);
- fprintf_unfiltered (f, " parent at offset: 0x%x\n",
- die->parent->offset);
- }
+ /* We have the section offset, but we need the signature to do the
+ hash table lookup. */
+ type_sig = lookup_signatured_type_at_offset (objfile, offset);
- print_spaces (indent, f);
- fprintf_unfiltered (f, " has children: %s\n",
- dwarf_bool_name (die->child != NULL));
+ gdb_assert (type_sig->per_cu.cu == NULL);
- print_spaces (indent, f);
- fprintf_unfiltered (f, " attributes:\n");
+ read_signatured_type (objfile, type_sig);
- for (i = 0; i < die->num_attrs; ++i)
+ gdb_assert (type_sig->per_cu.cu != NULL);
+}
+
+/* Read in a signatured type and build its CU and DIEs. */
+
+static void
+read_signatured_type (struct objfile *objfile,
+ struct signatured_type *type_sig)
+{
+ gdb_byte *types_ptr;
+ struct die_reader_specs reader_specs;
+ struct dwarf2_cu *cu;
+ ULONGEST signature;
+ struct cleanup *back_to, *free_cu_cleanup;
+
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
+ types_ptr = dwarf2_per_objfile->types.buffer + type_sig->offset;
+
+ gdb_assert (type_sig->per_cu.cu == NULL);
+
+ cu = xmalloc (sizeof (*cu));
+ init_one_comp_unit (cu, objfile);
+
+ type_sig->per_cu.cu = cu;
+ cu->per_cu = &type_sig->per_cu;
+
+ /* If an error occurs while loading, release our storage. */
+ free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
+
+ types_ptr = read_type_comp_unit_head (&cu->header, &signature,
+ types_ptr, objfile->obfd);
+ gdb_assert (signature == type_sig->signature);
+
+ cu->die_hash
+ = htab_create_alloc_ex (cu->header.length / 12,
+ die_hash,
+ die_eq,
+ NULL,
+ &cu->comp_unit_obstack,
+ hashtab_obstack_allocate,
+ dummy_obstack_deallocate);
+
+ dwarf2_read_abbrevs (cu->objfile->obfd, cu);
+ back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
+
+ init_cu_die_reader (&reader_specs, cu);
+
+ cu->dies = read_die_and_children (&reader_specs, types_ptr, &types_ptr,
+ NULL /*parent*/);
+
+ /* We try not to read any attributes in this function, because not
+ all objfiles needed for references have been loaded yet, and symbol
+ table processing isn't initialized. But we have to set the CU language,
+ or we won't be able to build types correctly. */
+ prepare_one_comp_unit (cu, cu->dies);
+
+ do_cleanups (back_to);
+
+ /* We've successfully allocated this compilation unit. Let our caller
+ clean it up when finished with it. */
+ discard_cleanups (free_cu_cleanup);
+
+ type_sig->per_cu.cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
+ dwarf2_per_objfile->read_in_chain = &type_sig->per_cu;
+}
+
+/* Decode simple location descriptions.
+ Given a pointer to a dwarf block that defines a location, compute
+ the location and return the value.
+
+ NOTE drow/2003-11-18: This function is called in two situations
+ now: for the address of static or global variables (partial symbols
+ only) and for offsets into structures which are expected to be
+ (more or less) constant. The partial symbol case should go away,
+ and only the constant case should remain. That will let this
+ function complain more accurately. A few special modes are allowed
+ without complaint for global variables (for instance, global
+ register values and thread-local values).
+
+ A location description containing no operations indicates that the
+ object is optimized out. The return value is 0 for that case.
+ FIXME drow/2003-11-16: No callers check for this case any more; soon all
+ callers will only want a very basic result and this can become a
+ complaint.
+
+ Note that stack[0] is unused except as a default error return. */
+
+static CORE_ADDR
+decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ int i;
+ int size = blk->size;
+ gdb_byte *data = blk->data;
+ CORE_ADDR stack[64];
+ int stacki;
+ unsigned int bytes_read, unsnd;
+ gdb_byte op;
+
+ i = 0;
+ stacki = 0;
+ stack[stacki] = 0;
+ stack[++stacki] = 0;
+
+ while (i < size)
{
- print_spaces (indent, f);
- fprintf_unfiltered (f, " %s (%s) ",
- dwarf_attr_name (die->attrs[i].name),
- dwarf_form_name (die->attrs[i].form));
+ op = data[i++];
+ switch (op)
+ {
+ case DW_OP_lit0:
+ case DW_OP_lit1:
+ case DW_OP_lit2:
+ case DW_OP_lit3:
+ case DW_OP_lit4:
+ case DW_OP_lit5:
+ case DW_OP_lit6:
+ case DW_OP_lit7:
+ case DW_OP_lit8:
+ case DW_OP_lit9:
+ case DW_OP_lit10:
+ case DW_OP_lit11:
+ case DW_OP_lit12:
+ case DW_OP_lit13:
+ case DW_OP_lit14:
+ case DW_OP_lit15:
+ case DW_OP_lit16:
+ case DW_OP_lit17:
+ case DW_OP_lit18:
+ case DW_OP_lit19:
+ case DW_OP_lit20:
+ case DW_OP_lit21:
+ case DW_OP_lit22:
+ case DW_OP_lit23:
+ case DW_OP_lit24:
+ case DW_OP_lit25:
+ case DW_OP_lit26:
+ case DW_OP_lit27:
+ case DW_OP_lit28:
+ case DW_OP_lit29:
+ case DW_OP_lit30:
+ case DW_OP_lit31:
+ stack[++stacki] = op - DW_OP_lit0;
+ break;
+
+ case DW_OP_reg0:
+ case DW_OP_reg1:
+ case DW_OP_reg2:
+ case DW_OP_reg3:
+ case DW_OP_reg4:
+ case DW_OP_reg5:
+ case DW_OP_reg6:
+ case DW_OP_reg7:
+ case DW_OP_reg8:
+ case DW_OP_reg9:
+ case DW_OP_reg10:
+ case DW_OP_reg11:
+ case DW_OP_reg12:
+ case DW_OP_reg13:
+ case DW_OP_reg14:
+ case DW_OP_reg15:
+ case DW_OP_reg16:
+ case DW_OP_reg17:
+ case DW_OP_reg18:
+ case DW_OP_reg19:
+ case DW_OP_reg20:
+ case DW_OP_reg21:
+ case DW_OP_reg22:
+ case DW_OP_reg23:
+ case DW_OP_reg24:
+ case DW_OP_reg25:
+ case DW_OP_reg26:
+ case DW_OP_reg27:
+ case DW_OP_reg28:
+ case DW_OP_reg29:
+ case DW_OP_reg30:
+ case DW_OP_reg31:
+ stack[++stacki] = op - DW_OP_reg0;
+ if (i < size)
+ dwarf2_complex_location_expr_complaint ();
+ break;
+
+ case DW_OP_regx:
+ unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
+ i += bytes_read;
+ stack[++stacki] = unsnd;
+ if (i < size)
+ dwarf2_complex_location_expr_complaint ();
+ break;
+
+ case DW_OP_addr:
+ stack[++stacki] = read_address (objfile->obfd, &data[i],
+ cu, &bytes_read);
+ i += bytes_read;
+ break;
+
+ case DW_OP_const1u:
+ stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
+ i += 1;
+ break;
- switch (die->attrs[i].form)
- {
- case DW_FORM_ref_addr:
- case DW_FORM_addr:
- fprintf_unfiltered (f, "address: ");
- fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f);
+ case DW_OP_const1s:
+ stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
+ i += 1;
break;
- case DW_FORM_block2:
- case DW_FORM_block4:
- case DW_FORM_block:
- case DW_FORM_block1:
- fprintf_unfiltered (f, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
+
+ case DW_OP_const2u:
+ stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
+ i += 2;
break;
- case DW_FORM_exprloc:
- fprintf_unfiltered (f, "expression: size %u",
- DW_BLOCK (&die->attrs[i])->size);
+
+ case DW_OP_const2s:
+ stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
+ i += 2;
break;
- case DW_FORM_ref1:
- case DW_FORM_ref2:
- case DW_FORM_ref4:
- fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)",
- (long) (DW_ADDR (&die->attrs[i])));
+
+ case DW_OP_const4u:
+ stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
+ i += 4;
break;
- case DW_FORM_data1:
- case DW_FORM_data2:
- case DW_FORM_data4:
- case DW_FORM_data8:
- case DW_FORM_udata:
- case DW_FORM_sdata:
- fprintf_unfiltered (f, "constant: %s",
- pulongest (DW_UNSND (&die->attrs[i])));
+
+ case DW_OP_const4s:
+ stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
+ i += 4;
break;
- case DW_FORM_sec_offset:
- fprintf_unfiltered (f, "section offset: %s",
- pulongest (DW_UNSND (&die->attrs[i])));
+
+ case DW_OP_constu:
+ stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
+ &bytes_read);
+ i += bytes_read;
break;
- case DW_FORM_sig8:
- if (DW_SIGNATURED_TYPE (&die->attrs[i]) != NULL)
- fprintf_unfiltered (f, "signatured type, offset: 0x%x",
- DW_SIGNATURED_TYPE (&die->attrs[i])->offset);
- else
- fprintf_unfiltered (f, "signatured type, offset: unknown");
+
+ case DW_OP_consts:
+ stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
+ i += bytes_read;
break;
- case DW_FORM_string:
- case DW_FORM_strp:
- fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)",
- DW_STRING (&die->attrs[i])
- ? DW_STRING (&die->attrs[i]) : "",
- DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not");
+
+ case DW_OP_dup:
+ stack[stacki + 1] = stack[stacki];
+ stacki++;
break;
- case DW_FORM_flag:
- if (DW_UNSND (&die->attrs[i]))
- fprintf_unfiltered (f, "flag: TRUE");
- else
- fprintf_unfiltered (f, "flag: FALSE");
+
+ case DW_OP_plus:
+ stack[stacki - 1] += stack[stacki];
+ stacki--;
break;
- case DW_FORM_flag_present:
- fprintf_unfiltered (f, "flag: TRUE");
+
+ case DW_OP_plus_uconst:
+ stack[stacki] += read_unsigned_leb128 (NULL, (data + i),
+ &bytes_read);
+ i += bytes_read;
break;
- case DW_FORM_indirect:
- /* the reader will have reduced the indirect form to
- the "base form" so this form should not occur */
- fprintf_unfiltered (f, "unexpected attribute form: DW_FORM_indirect");
+
+ case DW_OP_minus:
+ stack[stacki - 1] -= stack[stacki];
+ stacki--;
break;
- default:
- fprintf_unfiltered (f, "unsupported attribute form: %d.",
- die->attrs[i].form);
+
+ case DW_OP_deref:
+ /* If we're not the last op, then we definitely can't encode
+ this using GDB's address_class enum. This is valid for partial
+ global symbols, although the variable's address will be bogus
+ in the psymtab. */
+ if (i < size)
+ dwarf2_complex_location_expr_complaint ();
break;
- }
- fprintf_unfiltered (f, "\n");
- }
-}
-static void
-dump_die_for_error (struct die_info *die)
-{
- dump_die_shallow (gdb_stderr, 0, die);
-}
+ case DW_OP_GNU_push_tls_address:
+ /* The top of the stack has the offset from the beginning
+ of the thread control block at which the variable is located. */
+ /* Nothing should follow this operator, so the top of stack would
+ be returned. */
+ /* This is valid for partial global symbols, but the variable's
+ address will be bogus in the psymtab. */
+ if (i < size)
+ dwarf2_complex_location_expr_complaint ();
+ break;
-static void
-dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die)
-{
- int indent = level * 4;
+ case DW_OP_GNU_uninit:
+ break;
- gdb_assert (die != NULL);
+ default:
+ {
+ const char *name = dwarf_stack_op_name (op);
- if (level >= max_level)
- return;
+ if (name)
+ complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
+ name);
+ else
+ complaint (&symfile_complaints, _("unsupported stack op: '%02x'"),
+ op);
+ }
- dump_die_shallow (f, indent, die);
+ return (stack[stacki]);
+ }
- if (die->child != NULL)
- {
- print_spaces (indent, f);
- fprintf_unfiltered (f, " Children:");
- if (level + 1 < max_level)
+ /* Enforce maximum stack depth of SIZE-1 to avoid writing
+ outside of the allocated space. Also enforce minimum>0. */
+ if (stacki >= ARRAY_SIZE (stack) - 1)
{
- fprintf_unfiltered (f, "\n");
- dump_die_1 (f, level + 1, max_level, die->child);
+ complaint (&symfile_complaints,
+ _("location description stack overflow"));
+ return 0;
}
- else
+
+ if (stacki <= 0)
{
- fprintf_unfiltered (f, " [not printed, max nesting level reached]\n");
+ complaint (&symfile_complaints,
+ _("location description stack underflow"));
+ return 0;
}
}
-
- if (die->sibling != NULL && level > 0)
- {
- dump_die_1 (f, level, max_level, die->sibling);
- }
-}
-
-/* This is called from the pdie macro in gdbinit.in.
- It's not static so gcc will keep a copy callable from gdb. */
-
-void
-dump_die (struct die_info *die, int max_level)
-{
- dump_die_1 (gdb_stdlog, 0, max_level, die);
-}
-
-static void
-store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu)
-{
- void **slot;
-
- slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset, INSERT);
-
- *slot = die;
+ return (stack[stacki]);
}
-static int
-is_ref_attr (struct attribute *attr)
-{
- switch (attr->form)
- {
- case DW_FORM_ref_addr:
- case DW_FORM_ref1:
- case DW_FORM_ref2:
- case DW_FORM_ref4:
- case DW_FORM_ref8:
- case DW_FORM_ref_udata:
- return 1;
- default:
- return 0;
- }
-}
+/* memory allocation interface */
-static unsigned int
-dwarf2_get_ref_die_offset (struct attribute *attr)
+static struct dwarf_block *
+dwarf_alloc_block (struct dwarf2_cu *cu)
{
- if (is_ref_attr (attr))
- return DW_ADDR (attr);
-
- complaint (&symfile_complaints,
- _("unsupported die ref attribute form: '%s'"),
- dwarf_form_name (attr->form));
- return 0;
-}
-
-/* Return the constant value held by ATTR. Return DEFAULT_VALUE if
- * the value held by the attribute is not constant. */
+ struct dwarf_block *blk;
-static LONGEST
-dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
-{
- if (attr->form == DW_FORM_sdata)
- return DW_SND (attr);
- else if (attr->form == DW_FORM_udata
- || attr->form == DW_FORM_data1
- || attr->form == DW_FORM_data2
- || attr->form == DW_FORM_data4
- || attr->form == DW_FORM_data8)
- return DW_UNSND (attr);
- else
- {
- complaint (&symfile_complaints, _("Attribute value is not a constant (%s)"),
- dwarf_form_name (attr->form));
- return default_value;
- }
+ blk = (struct dwarf_block *)
+ obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
+ return (blk);
}
-/* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
- unit and add it to our queue.
- The result is non-zero if PER_CU was queued, otherwise the result is zero
- meaning either PER_CU is already queued or it is already loaded. */
-
-static int
-maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
- struct dwarf2_per_cu_data *per_cu)
-{
- /* Mark the dependence relation so that we don't flush PER_CU
- too early. */
- dwarf2_add_dependence (this_cu, per_cu);
-
- /* If it's already on the queue, we have nothing to do. */
- if (per_cu->queued)
- return 0;
-
- /* If the compilation unit is already loaded, just mark it as
- used. */
- if (per_cu->cu != NULL)
- {
- per_cu->cu->last_used = 0;
- return 0;
- }
-
- /* Add it to the queue. */
- queue_comp_unit (per_cu, this_cu->objfile);
+static struct abbrev_info *
+dwarf_alloc_abbrev (struct dwarf2_cu *cu)
+{
+ struct abbrev_info *abbrev;
- return 1;
+ abbrev = (struct abbrev_info *)
+ obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info));
+ memset (abbrev, 0, sizeof (struct abbrev_info));
+ return (abbrev);
}
-/* Follow reference or signature attribute ATTR of SRC_DIE.
- On entry *REF_CU is the CU of SRC_DIE.
- On exit *REF_CU is the CU of the result. */
-
static struct die_info *
-follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr,
- struct dwarf2_cu **ref_cu)
+dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs)
{
struct die_info *die;
+ size_t size = sizeof (struct die_info);
- if (is_ref_attr (attr))
- die = follow_die_ref (src_die, attr, ref_cu);
- else if (attr->form == DW_FORM_sig8)
- die = follow_die_sig (src_die, attr, ref_cu);
- else
- {
- dump_die_for_error (src_die);
- error (_("Dwarf Error: Expected reference attribute [in module %s]"),
- (*ref_cu)->objfile->name);
- }
+ if (num_attrs > 1)
+ size += (num_attrs - 1) * sizeof (struct attribute);
- return die;
+ die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size);
+ memset (die, 0, sizeof (struct die_info));
+ return (die);
}
-/* Follow reference OFFSET.
- On entry *REF_CU is the CU of source DIE referencing OFFSET.
- On exit *REF_CU is the CU of the result. */
+\f
+/* Macro support. */
-static struct die_info *
-follow_die_offset (unsigned int offset, struct dwarf2_cu **ref_cu)
+/* Return the full name of file number I in *LH's file name table.
+ Use COMP_DIR as the name of the current directory of the
+ compilation. The result is allocated using xmalloc; the caller is
+ responsible for freeing it. */
+static char *
+file_full_name (int file, struct line_header *lh, const char *comp_dir)
{
- struct die_info temp_die;
- struct dwarf2_cu *target_cu, *cu = *ref_cu;
-
- gdb_assert (cu->per_cu != NULL);
-
- if (cu->per_cu->from_debug_types)
- {
- /* .debug_types CUs cannot reference anything outside their CU.
- If they need to, they have to reference a signatured type via
- DW_FORM_sig8. */
- if (! offset_in_cu_p (&cu->header, offset))
- return NULL;
- target_cu = cu;
- }
- else if (! offset_in_cu_p (&cu->header, offset))
+ /* Is the file number a valid index into the line header's file name
+ table? Remember that file numbers start with one, not zero. */
+ if (1 <= file && file <= lh->num_file_names)
{
- struct dwarf2_per_cu_data *per_cu;
+ struct file_entry *fe = &lh->file_names[file - 1];
- per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
+ if (IS_ABSOLUTE_PATH (fe->name))
+ return xstrdup (fe->name);
+ else
+ {
+ const char *dir;
+ int dir_len;
+ char *full_name;
- /* If necessary, add it to the queue and load its DIEs. */
- if (maybe_queue_comp_unit (cu, per_cu))
- load_full_comp_unit (per_cu, cu->objfile);
+ if (fe->dir_index)
+ dir = lh->include_dirs[fe->dir_index - 1];
+ else
+ dir = comp_dir;
- target_cu = per_cu->cu;
+ if (dir)
+ {
+ dir_len = strlen (dir);
+ full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
+ strcpy (full_name, dir);
+ full_name[dir_len] = '/';
+ strcpy (full_name + dir_len + 1, fe->name);
+ return full_name;
+ }
+ else
+ return xstrdup (fe->name);
+ }
}
else
- target_cu = cu;
-
- *ref_cu = target_cu;
- temp_die.offset = offset;
- return htab_find_with_hash (target_cu->die_hash, &temp_die, offset);
-}
-
-/* Follow reference attribute ATTR of SRC_DIE.
- On entry *REF_CU is the CU of SRC_DIE.
- On exit *REF_CU is the CU of the result. */
+ {
+ /* The compiler produced a bogus file number. We can at least
+ record the macro definitions made in the file, even if we
+ won't be able to find the file by name. */
+ char fake_name[80];
-static struct die_info *
-follow_die_ref (struct die_info *src_die, struct attribute *attr,
- struct dwarf2_cu **ref_cu)
-{
- unsigned int offset = dwarf2_get_ref_die_offset (attr);
- struct dwarf2_cu *cu = *ref_cu;
- struct die_info *die;
+ sprintf (fake_name, "<bad macro file number %d>", file);
- die = follow_die_offset (offset, ref_cu);
- if (!die)
- error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
- "at 0x%x [in module %s]"),
- offset, src_die->offset, cu->objfile->name);
+ complaint (&symfile_complaints,
+ _("bad file number in macro information (%d)"),
+ file);
- return die;
+ return xstrdup (fake_name);
+ }
}
-/* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
- value is intended for DW_OP_call*. */
-struct dwarf2_locexpr_baton
-dwarf2_fetch_die_location_block (unsigned int offset,
- struct dwarf2_per_cu_data *per_cu)
+static struct macro_source_file *
+macro_start_file (int file, int line,
+ struct macro_source_file *current_file,
+ const char *comp_dir,
+ struct line_header *lh, struct objfile *objfile)
{
- struct dwarf2_cu *cu = per_cu->cu;
- struct die_info *die;
- struct attribute *attr;
- struct dwarf2_locexpr_baton retval;
-
- die = follow_die_offset (offset, &cu);
- if (!die)
- error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
- offset, per_cu->cu->objfile->name);
+ /* The full name of this source file. */
+ char *full_name = file_full_name (file, lh, comp_dir);
- attr = dwarf2_attr (die, DW_AT_location, cu);
- if (!attr)
- {
- /* DWARF: "If there is no such attribute, then there is no effect.". */
+ /* We don't create a macro table for this compilation unit
+ at all until we actually get a filename. */
+ if (! pending_macros)
+ pending_macros = new_macro_table (&objfile->objfile_obstack,
+ objfile->macro_cache);
- retval.data = NULL;
- retval.size = 0;
- }
+ if (! current_file)
+ /* If we have no current file, then this must be the start_file
+ directive for the compilation unit's main source file. */
+ current_file = macro_set_main (pending_macros, full_name);
else
- {
- if (!attr_form_is_block (attr))
- error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
- "is neither DW_FORM_block* nor DW_FORM_exprloc"),
- offset, per_cu->cu->objfile->name);
+ current_file = macro_include (current_file, line, full_name);
- retval.data = DW_BLOCK (attr)->data;
- retval.size = DW_BLOCK (attr)->size;
- }
- retval.per_cu = cu->per_cu;
- return retval;
+ xfree (full_name);
+
+ return current_file;
}
-/* Follow the signature attribute ATTR in SRC_DIE.
- On entry *REF_CU is the CU of SRC_DIE.
- On exit *REF_CU is the CU of the result. */
-static struct die_info *
-follow_die_sig (struct die_info *src_die, struct attribute *attr,
- struct dwarf2_cu **ref_cu)
+/* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
+ followed by a null byte. */
+static char *
+copy_string (const char *buf, int len)
{
- struct objfile *objfile = (*ref_cu)->objfile;
- struct die_info temp_die;
- struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
- struct dwarf2_cu *sig_cu;
- struct die_info *die;
-
- /* sig_type will be NULL if the signatured type is missing from
- the debug info. */
- if (sig_type == NULL)
- error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
- "at 0x%x [in module %s]"),
- src_die->offset, objfile->name);
-
- /* If necessary, add it to the queue and load its DIEs. */
+ char *s = xmalloc (len + 1);
- if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu))
- read_signatured_type (objfile, sig_type);
+ memcpy (s, buf, len);
+ s[len] = '\0';
+ return s;
+}
- gdb_assert (sig_type->per_cu.cu != NULL);
- sig_cu = sig_type->per_cu.cu;
- temp_die.offset = sig_cu->header.offset + sig_type->type_offset;
- die = htab_find_with_hash (sig_cu->die_hash, &temp_die, temp_die.offset);
- if (die)
+static const char *
+consume_improper_spaces (const char *p, const char *body)
+{
+ if (*p == ' ')
{
- *ref_cu = sig_cu;
- return die;
+ complaint (&symfile_complaints,
+ _("macro definition contains spaces "
+ "in formal argument list:\n`%s'"),
+ body);
+
+ while (*p == ' ')
+ p++;
}
- error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
- "at 0x%x [in module %s]"),
- sig_type->type_offset, src_die->offset, objfile->name);
+ return p;
}
-/* Given an offset of a signatured type, return its signatured_type. */
-static struct signatured_type *
-lookup_signatured_type_at_offset (struct objfile *objfile, unsigned int offset)
+static void
+parse_macro_definition (struct macro_source_file *file, int line,
+ const char *body)
{
- gdb_byte *info_ptr = dwarf2_per_objfile->types.buffer + offset;
- unsigned int length, initial_length_size;
- unsigned int sig_offset;
- struct signatured_type find_entry, *type_sig;
-
- length = read_initial_length (objfile->obfd, info_ptr, &initial_length_size);
- sig_offset = (initial_length_size
- + 2 /*version*/
- + (initial_length_size == 4 ? 4 : 8) /*debug_abbrev_offset*/
- + 1 /*address_size*/);
- find_entry.signature = bfd_get_64 (objfile->obfd, info_ptr + sig_offset);
- type_sig = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
+ const char *p;
- /* This is only used to lookup previously recorded types.
- If we didn't find it, it's our bug. */
- gdb_assert (type_sig != NULL);
- gdb_assert (offset == type_sig->offset);
+ /* The body string takes one of two forms. For object-like macro
+ definitions, it should be:
- return type_sig;
-}
+ <macro name> " " <definition>
-/* Read in signatured type at OFFSET and build its CU and die(s). */
+ For function-like macro definitions, it should be:
-static void
-read_signatured_type_at_offset (struct objfile *objfile,
- unsigned int offset)
-{
- struct signatured_type *type_sig;
+ <macro name> "() " <definition>
+ or
+ <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
- dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
+ Spaces may appear only where explicitly indicated, and in the
+ <definition>.
- /* We have the section offset, but we need the signature to do the
- hash table lookup. */
- type_sig = lookup_signatured_type_at_offset (objfile, offset);
+ The Dwarf 2 spec says that an object-like macro's name is always
+ followed by a space, but versions of GCC around March 2002 omit
+ the space when the macro's definition is the empty string.
- gdb_assert (type_sig->per_cu.cu == NULL);
+ The Dwarf 2 spec says that there should be no spaces between the
+ formal arguments in a function-like macro's formal argument list,
+ but versions of GCC around March 2002 include spaces after the
+ commas. */
- read_signatured_type (objfile, type_sig);
- gdb_assert (type_sig->per_cu.cu != NULL);
-}
+ /* Find the extent of the macro name. The macro name is terminated
+ by either a space or null character (for an object-like macro) or
+ an opening paren (for a function-like macro). */
+ for (p = body; *p; p++)
+ if (*p == ' ' || *p == '(')
+ break;
-/* Read in a signatured type and build its CU and DIEs. */
+ if (*p == ' ' || *p == '\0')
+ {
+ /* It's an object-like macro. */
+ int name_len = p - body;
+ char *name = copy_string (body, name_len);
+ const char *replacement;
-static void
-read_signatured_type (struct objfile *objfile,
- struct signatured_type *type_sig)
-{
- gdb_byte *types_ptr = dwarf2_per_objfile->types.buffer + type_sig->offset;
- struct die_reader_specs reader_specs;
- struct dwarf2_cu *cu;
- ULONGEST signature;
- struct cleanup *back_to, *free_cu_cleanup;
- struct attribute *attr;
+ if (*p == ' ')
+ replacement = body + name_len + 1;
+ else
+ {
+ dwarf2_macro_malformed_definition_complaint (body);
+ replacement = body + name_len;
+ }
- gdb_assert (type_sig->per_cu.cu == NULL);
+ macro_define_object (file, line, name, replacement);
- cu = xmalloc (sizeof (struct dwarf2_cu));
- memset (cu, 0, sizeof (struct dwarf2_cu));
- obstack_init (&cu->comp_unit_obstack);
- cu->objfile = objfile;
- type_sig->per_cu.cu = cu;
- cu->per_cu = &type_sig->per_cu;
+ xfree (name);
+ }
+ else if (*p == '(')
+ {
+ /* It's a function-like macro. */
+ char *name = copy_string (body, p - body);
+ int argc = 0;
+ int argv_size = 1;
+ char **argv = xmalloc (argv_size * sizeof (*argv));
- /* If an error occurs while loading, release our storage. */
- free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
+ p++;
- types_ptr = read_type_comp_unit_head (&cu->header, &signature,
- types_ptr, objfile->obfd);
- gdb_assert (signature == type_sig->signature);
+ p = consume_improper_spaces (p, body);
- cu->die_hash
- = htab_create_alloc_ex (cu->header.length / 12,
- die_hash,
- die_eq,
- NULL,
- &cu->comp_unit_obstack,
- hashtab_obstack_allocate,
- dummy_obstack_deallocate);
+ /* Parse the formal argument list. */
+ while (*p && *p != ')')
+ {
+ /* Find the extent of the current argument name. */
+ const char *arg_start = p;
- dwarf2_read_abbrevs (cu->objfile->obfd, cu);
- back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
+ while (*p && *p != ',' && *p != ')' && *p != ' ')
+ p++;
- init_cu_die_reader (&reader_specs, cu);
+ if (! *p || p == arg_start)
+ dwarf2_macro_malformed_definition_complaint (body);
+ else
+ {
+ /* Make sure argv has room for the new argument. */
+ if (argc >= argv_size)
+ {
+ argv_size *= 2;
+ argv = xrealloc (argv, argv_size * sizeof (*argv));
+ }
- cu->dies = read_die_and_children (&reader_specs, types_ptr, &types_ptr,
- NULL /*parent*/);
+ argv[argc++] = copy_string (arg_start, p - arg_start);
+ }
- /* We try not to read any attributes in this function, because not
- all objfiles needed for references have been loaded yet, and symbol
- table processing isn't initialized. But we have to set the CU language,
- or we won't be able to build types correctly. */
- attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
- if (attr)
- set_cu_language (DW_UNSND (attr), cu);
- else
- set_cu_language (language_minimal, cu);
+ p = consume_improper_spaces (p, body);
- do_cleanups (back_to);
+ /* Consume the comma, if present. */
+ if (*p == ',')
+ {
+ p++;
- /* We've successfully allocated this compilation unit. Let our caller
- clean it up when finished with it. */
- discard_cleanups (free_cu_cleanup);
+ p = consume_improper_spaces (p, body);
+ }
+ }
- type_sig->per_cu.cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
- dwarf2_per_objfile->read_in_chain = &type_sig->per_cu;
-}
+ if (*p == ')')
+ {
+ p++;
-/* Decode simple location descriptions.
- Given a pointer to a dwarf block that defines a location, compute
- the location and return the value.
+ if (*p == ' ')
+ /* Perfectly formed definition, no complaints. */
+ macro_define_function (file, line, name,
+ argc, (const char **) argv,
+ p + 1);
+ else if (*p == '\0')
+ {
+ /* Complain, but do define it. */
+ dwarf2_macro_malformed_definition_complaint (body);
+ macro_define_function (file, line, name,
+ argc, (const char **) argv,
+ p);
+ }
+ else
+ /* Just complain. */
+ dwarf2_macro_malformed_definition_complaint (body);
+ }
+ else
+ /* Just complain. */
+ dwarf2_macro_malformed_definition_complaint (body);
- NOTE drow/2003-11-18: This function is called in two situations
- now: for the address of static or global variables (partial symbols
- only) and for offsets into structures which are expected to be
- (more or less) constant. The partial symbol case should go away,
- and only the constant case should remain. That will let this
- function complain more accurately. A few special modes are allowed
- without complaint for global variables (for instance, global
- register values and thread-local values).
+ xfree (name);
+ {
+ int i;
- A location description containing no operations indicates that the
- object is optimized out. The return value is 0 for that case.
- FIXME drow/2003-11-16: No callers check for this case any more; soon all
- callers will only want a very basic result and this can become a
- complaint.
+ for (i = 0; i < argc; i++)
+ xfree (argv[i]);
+ }
+ xfree (argv);
+ }
+ else
+ dwarf2_macro_malformed_definition_complaint (body);
+}
- Note that stack[0] is unused except as a default error return.
- Note that stack overflow is not yet handled. */
-static CORE_ADDR
-decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
+static void
+dwarf_decode_macros (struct line_header *lh, unsigned int offset,
+ char *comp_dir, bfd *abfd,
+ struct dwarf2_cu *cu)
{
- struct objfile *objfile = cu->objfile;
- int i;
- int size = blk->size;
- gdb_byte *data = blk->data;
- CORE_ADDR stack[64];
- int stacki;
- unsigned int bytes_read, unsnd;
- gdb_byte op;
-
- i = 0;
- stacki = 0;
- stack[stacki] = 0;
+ gdb_byte *mac_ptr, *mac_end;
+ struct macro_source_file *current_file = 0;
+ enum dwarf_macinfo_record_type macinfo_type;
+ int at_commandline;
- while (i < size)
+ dwarf2_read_section (dwarf2_per_objfile->objfile,
+ &dwarf2_per_objfile->macinfo);
+ if (dwarf2_per_objfile->macinfo.buffer == NULL)
{
- op = data[i++];
- switch (op)
- {
- case DW_OP_lit0:
- case DW_OP_lit1:
- case DW_OP_lit2:
- case DW_OP_lit3:
- case DW_OP_lit4:
- case DW_OP_lit5:
- case DW_OP_lit6:
- case DW_OP_lit7:
- case DW_OP_lit8:
- case DW_OP_lit9:
- case DW_OP_lit10:
- case DW_OP_lit11:
- case DW_OP_lit12:
- case DW_OP_lit13:
- case DW_OP_lit14:
- case DW_OP_lit15:
- case DW_OP_lit16:
- case DW_OP_lit17:
- case DW_OP_lit18:
- case DW_OP_lit19:
- case DW_OP_lit20:
- case DW_OP_lit21:
- case DW_OP_lit22:
- case DW_OP_lit23:
- case DW_OP_lit24:
- case DW_OP_lit25:
- case DW_OP_lit26:
- case DW_OP_lit27:
- case DW_OP_lit28:
- case DW_OP_lit29:
- case DW_OP_lit30:
- case DW_OP_lit31:
- stack[++stacki] = op - DW_OP_lit0;
- break;
+ complaint (&symfile_complaints, _("missing .debug_macinfo section"));
+ return;
+ }
+
+ /* First pass: Find the name of the base filename.
+ This filename is needed in order to process all macros whose definition
+ (or undefinition) comes from the command line. These macros are defined
+ before the first DW_MACINFO_start_file entry, and yet still need to be
+ associated to the base file.
+
+ To determine the base file name, we scan the macro definitions until we
+ reach the first DW_MACINFO_start_file entry. We then initialize
+ CURRENT_FILE accordingly so that any macro definition found before the
+ first DW_MACINFO_start_file can still be associated to the base file. */
- case DW_OP_reg0:
- case DW_OP_reg1:
- case DW_OP_reg2:
- case DW_OP_reg3:
- case DW_OP_reg4:
- case DW_OP_reg5:
- case DW_OP_reg6:
- case DW_OP_reg7:
- case DW_OP_reg8:
- case DW_OP_reg9:
- case DW_OP_reg10:
- case DW_OP_reg11:
- case DW_OP_reg12:
- case DW_OP_reg13:
- case DW_OP_reg14:
- case DW_OP_reg15:
- case DW_OP_reg16:
- case DW_OP_reg17:
- case DW_OP_reg18:
- case DW_OP_reg19:
- case DW_OP_reg20:
- case DW_OP_reg21:
- case DW_OP_reg22:
- case DW_OP_reg23:
- case DW_OP_reg24:
- case DW_OP_reg25:
- case DW_OP_reg26:
- case DW_OP_reg27:
- case DW_OP_reg28:
- case DW_OP_reg29:
- case DW_OP_reg30:
- case DW_OP_reg31:
- stack[++stacki] = op - DW_OP_reg0;
- if (i < size)
- dwarf2_complex_location_expr_complaint ();
- break;
+ mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
+ mac_end = dwarf2_per_objfile->macinfo.buffer
+ + dwarf2_per_objfile->macinfo.size;
- case DW_OP_regx:
- unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
- i += bytes_read;
- stack[++stacki] = unsnd;
- if (i < size)
- dwarf2_complex_location_expr_complaint ();
+ do
+ {
+ /* Do we at least have room for a macinfo type byte? */
+ if (mac_ptr >= mac_end)
+ {
+ /* Complaint is printed during the second pass as GDB will probably
+ stop the first pass earlier upon finding
+ DW_MACINFO_start_file. */
break;
+ }
- case DW_OP_addr:
- stack[++stacki] = read_address (objfile->obfd, &data[i],
- cu, &bytes_read);
- i += bytes_read;
- break;
+ macinfo_type = read_1_byte (abfd, mac_ptr);
+ mac_ptr++;
- case DW_OP_const1u:
- stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
- i += 1;
+ switch (macinfo_type)
+ {
+ /* A zero macinfo type indicates the end of the macro
+ information. */
+ case 0:
break;
- case DW_OP_const1s:
- stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
- i += 1;
- break;
+ case DW_MACINFO_define:
+ case DW_MACINFO_undef:
+ /* Only skip the data by MAC_PTR. */
+ {
+ unsigned int bytes_read;
- case DW_OP_const2u:
- stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
- i += 2;
+ read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+ read_direct_string (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+ }
break;
- case DW_OP_const2s:
- stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
- i += 2;
- break;
+ case DW_MACINFO_start_file:
+ {
+ unsigned int bytes_read;
+ int line, file;
- case DW_OP_const4u:
- stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
- i += 4;
- break;
+ line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+ file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
- case DW_OP_const4s:
- stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
- i += 4;
+ current_file = macro_start_file (file, line, current_file,
+ comp_dir, lh, cu->objfile);
+ }
break;
- case DW_OP_constu:
- stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
- &bytes_read);
- i += bytes_read;
+ case DW_MACINFO_end_file:
+ /* No data to skip by MAC_PTR. */
break;
- case DW_OP_consts:
- stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
- i += bytes_read;
- break;
+ case DW_MACINFO_vendor_ext:
+ /* Only skip the data by MAC_PTR. */
+ {
+ unsigned int bytes_read;
- case DW_OP_dup:
- stack[stacki + 1] = stack[stacki];
- stacki++;
+ read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+ read_direct_string (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+ }
break;
- case DW_OP_plus:
- stack[stacki - 1] += stack[stacki];
- stacki--;
+ default:
break;
+ }
+ } while (macinfo_type != 0 && current_file == NULL);
- case DW_OP_plus_uconst:
- stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
- i += bytes_read;
+ /* Second pass: Process all entries.
+
+ Use the AT_COMMAND_LINE flag to determine whether we are still processing
+ command-line macro definitions/undefinitions. This flag is unset when we
+ reach the first DW_MACINFO_start_file entry. */
+
+ mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
+
+ /* Determines if GDB is still before first DW_MACINFO_start_file. If true
+ GDB is still reading the definitions from command line. First
+ DW_MACINFO_start_file will need to be ignored as it was already executed
+ to create CURRENT_FILE for the main source holding also the command line
+ definitions. On first met DW_MACINFO_start_file this flag is reset to
+ normally execute all the remaining DW_MACINFO_start_file macinfos. */
+
+ at_commandline = 1;
+
+ do
+ {
+ /* Do we at least have room for a macinfo type byte? */
+ if (mac_ptr >= mac_end)
+ {
+ dwarf2_macros_too_long_complaint ();
break;
+ }
- case DW_OP_minus:
- stack[stacki - 1] -= stack[stacki];
- stacki--;
+ macinfo_type = read_1_byte (abfd, mac_ptr);
+ mac_ptr++;
+
+ switch (macinfo_type)
+ {
+ /* A zero macinfo type indicates the end of the macro
+ information. */
+ case 0:
break;
- case DW_OP_deref:
- /* If we're not the last op, then we definitely can't encode
- this using GDB's address_class enum. This is valid for partial
- global symbols, although the variable's address will be bogus
- in the psymtab. */
- if (i < size)
- dwarf2_complex_location_expr_complaint ();
- break;
+ case DW_MACINFO_define:
+ case DW_MACINFO_undef:
+ {
+ unsigned int bytes_read;
+ int line;
+ char *body;
+
+ line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+ body = read_direct_string (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+
+ if (! current_file)
+ {
+ /* DWARF violation as no main source is present. */
+ complaint (&symfile_complaints,
+ _("debug info with no main source gives macro %s "
+ "on line %d: %s"),
+ macinfo_type == DW_MACINFO_define ?
+ _("definition") :
+ macinfo_type == DW_MACINFO_undef ?
+ _("undefinition") :
+ _("something-or-other"), line, body);
+ break;
+ }
+ if ((line == 0 && !at_commandline)
+ || (line != 0 && at_commandline))
+ complaint (&symfile_complaints,
+ _("debug info gives %s macro %s with %s line %d: %s"),
+ at_commandline ? _("command-line") : _("in-file"),
+ macinfo_type == DW_MACINFO_define ?
+ _("definition") :
+ macinfo_type == DW_MACINFO_undef ?
+ _("undefinition") :
+ _("something-or-other"),
+ line == 0 ? _("zero") : _("non-zero"), line, body);
+
+ if (macinfo_type == DW_MACINFO_define)
+ parse_macro_definition (current_file, line, body);
+ else if (macinfo_type == DW_MACINFO_undef)
+ macro_undef (current_file, line, body);
+ }
+ break;
+
+ case DW_MACINFO_start_file:
+ {
+ unsigned int bytes_read;
+ int line, file;
+
+ line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+ file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+
+ if ((line == 0 && !at_commandline)
+ || (line != 0 && at_commandline))
+ complaint (&symfile_complaints,
+ _("debug info gives source %d included "
+ "from %s at %s line %d"),
+ file, at_commandline ? _("command-line") : _("file"),
+ line == 0 ? _("zero") : _("non-zero"), line);
+
+ if (at_commandline)
+ {
+ /* This DW_MACINFO_start_file was executed in the pass one. */
+ at_commandline = 0;
+ }
+ else
+ current_file = macro_start_file (file, line,
+ current_file, comp_dir,
+ lh, cu->objfile);
+ }
+ break;
+
+ case DW_MACINFO_end_file:
+ if (! current_file)
+ complaint (&symfile_complaints,
+ _("macro debug info has an unmatched "
+ "`close_file' directive"));
+ else
+ {
+ current_file = current_file->included_by;
+ if (! current_file)
+ {
+ enum dwarf_macinfo_record_type next_type;
+
+ /* GCC circa March 2002 doesn't produce the zero
+ type byte marking the end of the compilation
+ unit. Complain if it's not there, but exit no
+ matter what. */
+
+ /* Do we at least have room for a macinfo type byte? */
+ if (mac_ptr >= mac_end)
+ {
+ dwarf2_macros_too_long_complaint ();
+ return;
+ }
+
+ /* We don't increment mac_ptr here, so this is just
+ a look-ahead. */
+ next_type = read_1_byte (abfd, mac_ptr);
+ if (next_type != 0)
+ complaint (&symfile_complaints,
+ _("no terminating 0-type entry for "
+ "macros in `.debug_macinfo' section"));
- case DW_OP_GNU_push_tls_address:
- /* The top of the stack has the offset from the beginning
- of the thread control block at which the variable is located. */
- /* Nothing should follow this operator, so the top of stack would
- be returned. */
- /* This is valid for partial global symbols, but the variable's
- address will be bogus in the psymtab. */
- if (i < size)
- dwarf2_complex_location_expr_complaint ();
+ return;
+ }
+ }
break;
- case DW_OP_GNU_uninit:
- break;
+ case DW_MACINFO_vendor_ext:
+ {
+ unsigned int bytes_read;
+ int constant;
- default:
- complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
- dwarf_stack_op_name (op, 1));
- return (stack[stacki]);
- }
- }
- return (stack[stacki]);
-}
+ constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+ read_direct_string (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
-/* memory allocation interface */
+ /* We don't recognize any vendor extensions. */
+ }
+ break;
+ }
+ } while (macinfo_type != 0);
+}
-static struct dwarf_block *
-dwarf_alloc_block (struct dwarf2_cu *cu)
+/* Check if the attribute's form is a DW_FORM_block*
+ if so return true else false. */
+static int
+attr_form_is_block (struct attribute *attr)
{
- struct dwarf_block *blk;
-
- blk = (struct dwarf_block *)
- obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
- return (blk);
+ return (attr == NULL ? 0 :
+ attr->form == DW_FORM_block1
+ || attr->form == DW_FORM_block2
+ || attr->form == DW_FORM_block4
+ || attr->form == DW_FORM_block
+ || attr->form == DW_FORM_exprloc);
}
-static struct abbrev_info *
-dwarf_alloc_abbrev (struct dwarf2_cu *cu)
-{
- struct abbrev_info *abbrev;
+/* Return non-zero if ATTR's value is a section offset --- classes
+ lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
+ You may use DW_UNSND (attr) to retrieve such offsets.
- abbrev = (struct abbrev_info *)
- obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info));
- memset (abbrev, 0, sizeof (struct abbrev_info));
- return (abbrev);
+ Section 7.5.4, "Attribute Encodings", explains that no attribute
+ may have a value that belongs to more than one of these classes; it
+ would be ambiguous if we did, because we use the same forms for all
+ of them. */
+static int
+attr_form_is_section_offset (struct attribute *attr)
+{
+ return (attr->form == DW_FORM_data4
+ || attr->form == DW_FORM_data8
+ || attr->form == DW_FORM_sec_offset);
}
-static struct die_info *
-dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs)
-{
- struct die_info *die;
- size_t size = sizeof (struct die_info);
- if (num_attrs > 1)
- size += (num_attrs - 1) * sizeof (struct attribute);
+/* Return non-zero if ATTR's value falls in the 'constant' class, or
+ zero otherwise. When this function returns true, you can apply
+ dwarf2_get_attr_constant_value to it.
- die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size);
- memset (die, 0, sizeof (struct die_info));
- return (die);
+ However, note that for some attributes you must check
+ attr_form_is_section_offset before using this test. DW_FORM_data4
+ and DW_FORM_data8 are members of both the constant class, and of
+ the classes that contain offsets into other debug sections
+ (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
+ that, if an attribute's can be either a constant or one of the
+ section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
+ taken as section offsets, not constants. */
+static int
+attr_form_is_constant (struct attribute *attr)
+{
+ switch (attr->form)
+ {
+ case DW_FORM_sdata:
+ case DW_FORM_udata:
+ case DW_FORM_data1:
+ case DW_FORM_data2:
+ case DW_FORM_data4:
+ case DW_FORM_data8:
+ return 1;
+ default:
+ return 0;
+ }
}
-\f
-/* Macro support. */
+/* A helper function that fills in a dwarf2_loclist_baton. */
+
+static void
+fill_in_loclist_baton (struct dwarf2_cu *cu,
+ struct dwarf2_loclist_baton *baton,
+ struct attribute *attr)
+{
+ dwarf2_read_section (dwarf2_per_objfile->objfile,
+ &dwarf2_per_objfile->loc);
+ baton->per_cu = cu->per_cu;
+ gdb_assert (baton->per_cu);
+ /* We don't know how long the location list is, but make sure we
+ don't run off the edge of the section. */
+ baton->size = dwarf2_per_objfile->loc.size - DW_UNSND (attr);
+ baton->data = dwarf2_per_objfile->loc.buffer + DW_UNSND (attr);
+ baton->base_address = cu->base_address;
+}
-/* Return the full name of file number I in *LH's file name table.
- Use COMP_DIR as the name of the current directory of the
- compilation. The result is allocated using xmalloc; the caller is
- responsible for freeing it. */
-static char *
-file_full_name (int file, struct line_header *lh, const char *comp_dir)
+static void
+dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
+ struct dwarf2_cu *cu)
{
- /* Is the file number a valid index into the line header's file name
- table? Remember that file numbers start with one, not zero. */
- if (1 <= file && file <= lh->num_file_names)
+ if (attr_form_is_section_offset (attr)
+ /* ".debug_loc" may not exist at all, or the offset may be outside
+ the section. If so, fall through to the complaint in the
+ other branch. */
+ && DW_UNSND (attr) < dwarf2_section_size (dwarf2_per_objfile->objfile,
+ &dwarf2_per_objfile->loc))
{
- struct file_entry *fe = &lh->file_names[file - 1];
+ struct dwarf2_loclist_baton *baton;
- if (IS_ABSOLUTE_PATH (fe->name))
- return xstrdup (fe->name);
- else
- {
- const char *dir;
- int dir_len;
- char *full_name;
+ baton = obstack_alloc (&cu->objfile->objfile_obstack,
+ sizeof (struct dwarf2_loclist_baton));
- if (fe->dir_index)
- dir = lh->include_dirs[fe->dir_index - 1];
- else
- dir = comp_dir;
+ fill_in_loclist_baton (cu, baton, attr);
- if (dir)
- {
- dir_len = strlen (dir);
- full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
- strcpy (full_name, dir);
- full_name[dir_len] = '/';
- strcpy (full_name + dir_len + 1, fe->name);
- return full_name;
- }
- else
- return xstrdup (fe->name);
- }
+ if (cu->base_known == 0)
+ complaint (&symfile_complaints,
+ _("Location list used without "
+ "specifying the CU base address."));
+
+ SYMBOL_COMPUTED_OPS (sym) = &dwarf2_loclist_funcs;
+ SYMBOL_LOCATION_BATON (sym) = baton;
}
else
{
- /* The compiler produced a bogus file number. We can at least
- record the macro definitions made in the file, even if we
- won't be able to find the file by name. */
- char fake_name[80];
+ struct dwarf2_locexpr_baton *baton;
- sprintf (fake_name, "<bad macro file number %d>", file);
+ baton = obstack_alloc (&cu->objfile->objfile_obstack,
+ sizeof (struct dwarf2_locexpr_baton));
+ baton->per_cu = cu->per_cu;
+ gdb_assert (baton->per_cu);
- complaint (&symfile_complaints,
- _("bad file number in macro information (%d)"),
- file);
+ if (attr_form_is_block (attr))
+ {
+ /* Note that we're just copying the block's data pointer
+ here, not the actual data. We're still pointing into the
+ info_buffer for SYM's objfile; right now we never release
+ that buffer, but when we do clean up properly this may
+ need to change. */
+ baton->size = DW_BLOCK (attr)->size;
+ baton->data = DW_BLOCK (attr)->data;
+ }
+ else
+ {
+ dwarf2_invalid_attrib_class_complaint ("location description",
+ SYMBOL_NATURAL_NAME (sym));
+ baton->size = 0;
+ baton->data = NULL;
+ }
- return xstrdup (fake_name);
+ SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
+ SYMBOL_LOCATION_BATON (sym) = baton;
}
}
+/* Return the OBJFILE associated with the compilation unit CU. If CU
+ came from a separate debuginfo file, then the master objfile is
+ returned. */
-static struct macro_source_file *
-macro_start_file (int file, int line,
- struct macro_source_file *current_file,
- const char *comp_dir,
- struct line_header *lh, struct objfile *objfile)
+struct objfile *
+dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu)
{
- /* The full name of this source file. */
- char *full_name = file_full_name (file, lh, comp_dir);
+ struct objfile *objfile = per_cu->objfile;
- /* We don't create a macro table for this compilation unit
- at all until we actually get a filename. */
- if (! pending_macros)
- pending_macros = new_macro_table (&objfile->objfile_obstack,
- objfile->macro_cache);
+ /* Return the master objfile, so that we can report and look up the
+ correct file containing this variable. */
+ if (objfile->separate_debug_objfile_backlink)
+ objfile = objfile->separate_debug_objfile_backlink;
+
+ return objfile;
+}
+
+/* Return the address size given in the compilation unit header for CU. */
+
+CORE_ADDR
+dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu)
+{
+ if (per_cu->cu)
+ return per_cu->cu->header.addr_size;
+ else
+ {
+ /* If the CU is not currently read in, we re-read its header. */
+ struct objfile *objfile = per_cu->objfile;
+ struct dwarf2_per_objfile *per_objfile
+ = objfile_data (objfile, dwarf2_objfile_data_key);
+ gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
+ struct comp_unit_head cu_header;
+
+ memset (&cu_header, 0, sizeof cu_header);
+ read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
+ return cu_header.addr_size;
+ }
+}
+
+/* Return the offset size given in the compilation unit header for CU. */
- if (! current_file)
- /* If we have no current file, then this must be the start_file
- directive for the compilation unit's main source file. */
- current_file = macro_set_main (pending_macros, full_name);
+int
+dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu)
+{
+ if (per_cu->cu)
+ return per_cu->cu->header.offset_size;
else
- current_file = macro_include (current_file, line, full_name);
-
- xfree (full_name);
+ {
+ /* If the CU is not currently read in, we re-read its header. */
+ struct objfile *objfile = per_cu->objfile;
+ struct dwarf2_per_objfile *per_objfile
+ = objfile_data (objfile, dwarf2_objfile_data_key);
+ gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
+ struct comp_unit_head cu_header;
- return current_file;
+ memset (&cu_header, 0, sizeof cu_header);
+ read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
+ return cu_header.offset_size;
+ }
}
+/* Return the text offset of the CU. The returned offset comes from
+ this CU's objfile. If this objfile came from a separate debuginfo
+ file, then the offset may be different from the corresponding
+ offset in the parent objfile. */
-/* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
- followed by a null byte. */
-static char *
-copy_string (const char *buf, int len)
+CORE_ADDR
+dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu)
{
- char *s = xmalloc (len + 1);
+ struct objfile *objfile = per_cu->objfile;
- memcpy (s, buf, len);
- s[len] = '\0';
- return s;
+ return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
}
+/* Locate the .debug_info compilation unit from CU's objfile which contains
+ the DIE at OFFSET. Raises an error on failure. */
-static const char *
-consume_improper_spaces (const char *p, const char *body)
+static struct dwarf2_per_cu_data *
+dwarf2_find_containing_comp_unit (unsigned int offset,
+ struct objfile *objfile)
{
- if (*p == ' ')
+ struct dwarf2_per_cu_data *this_cu;
+ int low, high;
+
+ low = 0;
+ high = dwarf2_per_objfile->n_comp_units - 1;
+ while (high > low)
{
- complaint (&symfile_complaints,
- _("macro definition contains spaces in formal argument list:\n`%s'"),
- body);
+ int mid = low + (high - low) / 2;
- while (*p == ' ')
- p++;
+ if (dwarf2_per_objfile->all_comp_units[mid]->offset >= offset)
+ high = mid;
+ else
+ low = mid + 1;
}
+ gdb_assert (low == high);
+ if (dwarf2_per_objfile->all_comp_units[low]->offset > offset)
+ {
+ if (low == 0)
+ error (_("Dwarf Error: could not find partial DIE containing "
+ "offset 0x%lx [in module %s]"),
+ (long) offset, bfd_get_filename (objfile->obfd));
- return p;
+ gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset <= offset);
+ return dwarf2_per_objfile->all_comp_units[low-1];
+ }
+ else
+ {
+ this_cu = dwarf2_per_objfile->all_comp_units[low];
+ if (low == dwarf2_per_objfile->n_comp_units - 1
+ && offset >= this_cu->offset + this_cu->length)
+ error (_("invalid dwarf2 offset %u"), offset);
+ gdb_assert (offset < this_cu->offset + this_cu->length);
+ return this_cu;
+ }
}
+/* Locate the compilation unit from OBJFILE which is located at exactly
+ OFFSET. Raises an error on failure. */
-static void
-parse_macro_definition (struct macro_source_file *file, int line,
- const char *body)
+static struct dwarf2_per_cu_data *
+dwarf2_find_comp_unit (unsigned int offset, struct objfile *objfile)
{
- const char *p;
-
- /* The body string takes one of two forms. For object-like macro
- definitions, it should be:
-
- <macro name> " " <definition>
-
- For function-like macro definitions, it should be:
+ struct dwarf2_per_cu_data *this_cu;
- <macro name> "() " <definition>
- or
- <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
+ this_cu = dwarf2_find_containing_comp_unit (offset, objfile);
+ if (this_cu->offset != offset)
+ error (_("no compilation unit with offset %u."), offset);
+ return this_cu;
+}
- Spaces may appear only where explicitly indicated, and in the
- <definition>.
+/* Initialize dwarf2_cu CU for OBJFILE in a pre-allocated space. */
- The Dwarf 2 spec says that an object-like macro's name is always
- followed by a space, but versions of GCC around March 2002 omit
- the space when the macro's definition is the empty string.
+static void
+init_one_comp_unit (struct dwarf2_cu *cu, struct objfile *objfile)
+{
+ memset (cu, 0, sizeof (*cu));
+ cu->objfile = objfile;
+ obstack_init (&cu->comp_unit_obstack);
+}
- The Dwarf 2 spec says that there should be no spaces between the
- formal arguments in a function-like macro's formal argument list,
- but versions of GCC around March 2002 include spaces after the
- commas. */
+/* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
+static void
+prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die)
+{
+ struct attribute *attr;
- /* Find the extent of the macro name. The macro name is terminated
- by either a space or null character (for an object-like macro) or
- an opening paren (for a function-like macro). */
- for (p = body; *p; p++)
- if (*p == ' ' || *p == '(')
- break;
+ /* Set the language we're debugging. */
+ attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu);
+ if (attr)
+ set_cu_language (DW_UNSND (attr), cu);
+ else
+ set_cu_language (language_minimal, cu);
+}
- if (*p == ' ' || *p == '\0')
- {
- /* It's an object-like macro. */
- int name_len = p - body;
- char *name = copy_string (body, name_len);
- const char *replacement;
+/* Release one cached compilation unit, CU. We unlink it from the tree
+ of compilation units, but we don't remove it from the read_in_chain;
+ the caller is responsible for that.
+ NOTE: DATA is a void * because this function is also used as a
+ cleanup routine. */
- if (*p == ' ')
- replacement = body + name_len + 1;
- else
- {
- dwarf2_macro_malformed_definition_complaint (body);
- replacement = body + name_len;
- }
+static void
+free_one_comp_unit (void *data)
+{
+ struct dwarf2_cu *cu = data;
- macro_define_object (file, line, name, replacement);
+ if (cu->per_cu != NULL)
+ cu->per_cu->cu = NULL;
+ cu->per_cu = NULL;
- xfree (name);
- }
- else if (*p == '(')
- {
- /* It's a function-like macro. */
- char *name = copy_string (body, p - body);
- int argc = 0;
- int argv_size = 1;
- char **argv = xmalloc (argv_size * sizeof (*argv));
+ obstack_free (&cu->comp_unit_obstack, NULL);
- p++;
+ xfree (cu);
+}
- p = consume_improper_spaces (p, body);
+/* This cleanup function is passed the address of a dwarf2_cu on the stack
+ when we're finished with it. We can't free the pointer itself, but be
+ sure to unlink it from the cache. Also release any associated storage
+ and perform cache maintenance.
- /* Parse the formal argument list. */
- while (*p && *p != ')')
- {
- /* Find the extent of the current argument name. */
- const char *arg_start = p;
+ Only used during partial symbol parsing. */
- while (*p && *p != ',' && *p != ')' && *p != ' ')
- p++;
+static void
+free_stack_comp_unit (void *data)
+{
+ struct dwarf2_cu *cu = data;
- if (! *p || p == arg_start)
- dwarf2_macro_malformed_definition_complaint (body);
- else
- {
- /* Make sure argv has room for the new argument. */
- if (argc >= argv_size)
- {
- argv_size *= 2;
- argv = xrealloc (argv, argv_size * sizeof (*argv));
- }
+ obstack_free (&cu->comp_unit_obstack, NULL);
+ cu->partial_dies = NULL;
- argv[argc++] = copy_string (arg_start, p - arg_start);
- }
+ if (cu->per_cu != NULL)
+ {
+ /* This compilation unit is on the stack in our caller, so we
+ should not xfree it. Just unlink it. */
+ cu->per_cu->cu = NULL;
+ cu->per_cu = NULL;
- p = consume_improper_spaces (p, body);
+ /* If we had a per-cu pointer, then we may have other compilation
+ units loaded, so age them now. */
+ age_cached_comp_units ();
+ }
+}
- /* Consume the comma, if present. */
- if (*p == ',')
- {
- p++;
+/* Free all cached compilation units. */
- p = consume_improper_spaces (p, body);
- }
- }
+static void
+free_cached_comp_units (void *data)
+{
+ struct dwarf2_per_cu_data *per_cu, **last_chain;
- if (*p == ')')
- {
- p++;
+ per_cu = dwarf2_per_objfile->read_in_chain;
+ last_chain = &dwarf2_per_objfile->read_in_chain;
+ while (per_cu != NULL)
+ {
+ struct dwarf2_per_cu_data *next_cu;
- if (*p == ' ')
- /* Perfectly formed definition, no complaints. */
- macro_define_function (file, line, name,
- argc, (const char **) argv,
- p + 1);
- else if (*p == '\0')
- {
- /* Complain, but do define it. */
- dwarf2_macro_malformed_definition_complaint (body);
- macro_define_function (file, line, name,
- argc, (const char **) argv,
- p);
- }
- else
- /* Just complain. */
- dwarf2_macro_malformed_definition_complaint (body);
- }
- else
- /* Just complain. */
- dwarf2_macro_malformed_definition_complaint (body);
+ next_cu = per_cu->cu->read_in_chain;
- xfree (name);
- {
- int i;
+ free_one_comp_unit (per_cu->cu);
+ *last_chain = next_cu;
- for (i = 0; i < argc; i++)
- xfree (argv[i]);
- }
- xfree (argv);
+ per_cu = next_cu;
}
- else
- dwarf2_macro_malformed_definition_complaint (body);
}
+/* Increase the age counter on each cached compilation unit, and free
+ any that are too old. */
static void
-dwarf_decode_macros (struct line_header *lh, unsigned int offset,
- char *comp_dir, bfd *abfd,
- struct dwarf2_cu *cu)
+age_cached_comp_units (void)
{
- gdb_byte *mac_ptr, *mac_end;
- struct macro_source_file *current_file = 0;
- enum dwarf_macinfo_record_type macinfo_type;
- int at_commandline;
+ struct dwarf2_per_cu_data *per_cu, **last_chain;
- dwarf2_read_section (dwarf2_per_objfile->objfile,
- &dwarf2_per_objfile->macinfo);
- if (dwarf2_per_objfile->macinfo.buffer == NULL)
+ dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
+ per_cu = dwarf2_per_objfile->read_in_chain;
+ while (per_cu != NULL)
{
- complaint (&symfile_complaints, _("missing .debug_macinfo section"));
- return;
+ per_cu->cu->last_used ++;
+ if (per_cu->cu->last_used <= dwarf2_max_cache_age)
+ dwarf2_mark (per_cu->cu);
+ per_cu = per_cu->cu->read_in_chain;
}
- /* First pass: Find the name of the base filename.
- This filename is needed in order to process all macros whose definition
- (or undefinition) comes from the command line. These macros are defined
- before the first DW_MACINFO_start_file entry, and yet still need to be
- associated to the base file.
+ per_cu = dwarf2_per_objfile->read_in_chain;
+ last_chain = &dwarf2_per_objfile->read_in_chain;
+ while (per_cu != NULL)
+ {
+ struct dwarf2_per_cu_data *next_cu;
- To determine the base file name, we scan the macro definitions until we
- reach the first DW_MACINFO_start_file entry. We then initialize
- CURRENT_FILE accordingly so that any macro definition found before the
- first DW_MACINFO_start_file can still be associated to the base file. */
+ next_cu = per_cu->cu->read_in_chain;
- mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
- mac_end = dwarf2_per_objfile->macinfo.buffer
- + dwarf2_per_objfile->macinfo.size;
+ if (!per_cu->cu->mark)
+ {
+ free_one_comp_unit (per_cu->cu);
+ *last_chain = next_cu;
+ }
+ else
+ last_chain = &per_cu->cu->read_in_chain;
- do
+ per_cu = next_cu;
+ }
+}
+
+/* Remove a single compilation unit from the cache. */
+
+static void
+free_one_cached_comp_unit (void *target_cu)
+{
+ struct dwarf2_per_cu_data *per_cu, **last_chain;
+
+ per_cu = dwarf2_per_objfile->read_in_chain;
+ last_chain = &dwarf2_per_objfile->read_in_chain;
+ while (per_cu != NULL)
{
- /* Do we at least have room for a macinfo type byte? */
- if (mac_ptr >= mac_end)
- {
- /* Complaint is printed during the second pass as GDB will probably
- stop the first pass earlier upon finding DW_MACINFO_start_file. */
- break;
- }
+ struct dwarf2_per_cu_data *next_cu;
- macinfo_type = read_1_byte (abfd, mac_ptr);
- mac_ptr++;
+ next_cu = per_cu->cu->read_in_chain;
- switch (macinfo_type)
- {
- /* A zero macinfo type indicates the end of the macro
- information. */
- case 0:
+ if (per_cu->cu == target_cu)
+ {
+ free_one_comp_unit (per_cu->cu);
+ *last_chain = next_cu;
break;
+ }
+ else
+ last_chain = &per_cu->cu->read_in_chain;
- case DW_MACINFO_define:
- case DW_MACINFO_undef:
- /* Only skip the data by MAC_PTR. */
- {
- unsigned int bytes_read;
+ per_cu = next_cu;
+ }
+}
- read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
- mac_ptr += bytes_read;
- read_string (abfd, mac_ptr, &bytes_read);
- mac_ptr += bytes_read;
- }
- break;
+/* Release all extra memory associated with OBJFILE. */
- case DW_MACINFO_start_file:
- {
- unsigned int bytes_read;
- int line, file;
+void
+dwarf2_free_objfile (struct objfile *objfile)
+{
+ dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
- line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
- mac_ptr += bytes_read;
- file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
- mac_ptr += bytes_read;
+ if (dwarf2_per_objfile == NULL)
+ return;
- current_file = macro_start_file (file, line, current_file, comp_dir,
- lh, cu->objfile);
- }
- break;
+ /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
+ free_cached_comp_units (NULL);
- case DW_MACINFO_end_file:
- /* No data to skip by MAC_PTR. */
- break;
+ if (dwarf2_per_objfile->quick_file_names_table)
+ htab_delete (dwarf2_per_objfile->quick_file_names_table);
- case DW_MACINFO_vendor_ext:
- /* Only skip the data by MAC_PTR. */
- {
- unsigned int bytes_read;
+ /* Everything else should be on the objfile obstack. */
+}
- read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
- mac_ptr += bytes_read;
- read_string (abfd, mac_ptr, &bytes_read);
- mac_ptr += bytes_read;
- }
- break;
+/* A pair of DIE offset and GDB type pointer. We store these
+ in a hash table separate from the DIEs, and preserve them
+ when the DIEs are flushed out of cache. */
- default:
- break;
- }
- } while (macinfo_type != 0 && current_file == NULL);
+struct dwarf2_offset_and_type
+{
+ unsigned int offset;
+ struct type *type;
+};
- /* Second pass: Process all entries.
+/* Hash function for a dwarf2_offset_and_type. */
- Use the AT_COMMAND_LINE flag to determine whether we are still processing
- command-line macro definitions/undefinitions. This flag is unset when we
- reach the first DW_MACINFO_start_file entry. */
+static hashval_t
+offset_and_type_hash (const void *item)
+{
+ const struct dwarf2_offset_and_type *ofs = item;
- mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
+ return ofs->offset;
+}
- /* Determines if GDB is still before first DW_MACINFO_start_file. If true
- GDB is still reading the definitions from command line. First
- DW_MACINFO_start_file will need to be ignored as it was already executed
- to create CURRENT_FILE for the main source holding also the command line
- definitions. On first met DW_MACINFO_start_file this flag is reset to
- normally execute all the remaining DW_MACINFO_start_file macinfos. */
+/* Equality function for a dwarf2_offset_and_type. */
- at_commandline = 1;
+static int
+offset_and_type_eq (const void *item_lhs, const void *item_rhs)
+{
+ const struct dwarf2_offset_and_type *ofs_lhs = item_lhs;
+ const struct dwarf2_offset_and_type *ofs_rhs = item_rhs;
- do
- {
- /* Do we at least have room for a macinfo type byte? */
- if (mac_ptr >= mac_end)
- {
- dwarf2_macros_too_long_complaint ();
- break;
- }
+ return ofs_lhs->offset == ofs_rhs->offset;
+}
- macinfo_type = read_1_byte (abfd, mac_ptr);
- mac_ptr++;
+/* Set the type associated with DIE to TYPE. Save it in CU's hash
+ table if necessary. For convenience, return TYPE.
- switch (macinfo_type)
- {
- /* A zero macinfo type indicates the end of the macro
- information. */
- case 0:
- break;
+ The DIEs reading must have careful ordering to:
+ * Not cause infite loops trying to read in DIEs as a prerequisite for
+ reading current DIE.
+ * Not trying to dereference contents of still incompletely read in types
+ while reading in other DIEs.
+ * Enable referencing still incompletely read in types just by a pointer to
+ the type without accessing its fields.
- case DW_MACINFO_define:
- case DW_MACINFO_undef:
- {
- unsigned int bytes_read;
- int line;
- char *body;
+ Therefore caller should follow these rules:
+ * Try to fetch any prerequisite types we may need to build this DIE type
+ before building the type and calling set_die_type.
+ * After building type call set_die_type for current DIE as soon as
+ possible before fetching more types to complete the current type.
+ * Make the type as complete as possible before fetching more types. */
- line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
- mac_ptr += bytes_read;
- body = read_string (abfd, mac_ptr, &bytes_read);
- mac_ptr += bytes_read;
+static struct type *
+set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
+{
+ struct dwarf2_offset_and_type **slot, ofs;
+ struct objfile *objfile = cu->objfile;
+ htab_t *type_hash_ptr;
- if (! current_file)
- {
- /* DWARF violation as no main source is present. */
- complaint (&symfile_complaints,
- _("debug info with no main source gives macro %s "
- "on line %d: %s"),
- macinfo_type == DW_MACINFO_define ?
- _("definition") :
- macinfo_type == DW_MACINFO_undef ?
- _("undefinition") :
- _("something-or-other"), line, body);
- break;
- }
- if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
- complaint (&symfile_complaints,
- _("debug info gives %s macro %s with %s line %d: %s"),
- at_commandline ? _("command-line") : _("in-file"),
- macinfo_type == DW_MACINFO_define ?
- _("definition") :
- macinfo_type == DW_MACINFO_undef ?
- _("undefinition") :
- _("something-or-other"),
- line == 0 ? _("zero") : _("non-zero"), line, body);
+ /* For Ada types, make sure that the gnat-specific data is always
+ initialized (if not already set). There are a few types where
+ we should not be doing so, because the type-specific area is
+ already used to hold some other piece of info (eg: TYPE_CODE_FLT
+ where the type-specific area is used to store the floatformat).
+ But this is not a problem, because the gnat-specific information
+ is actually not needed for these types. */
+ if (need_gnat_info (cu)
+ && TYPE_CODE (type) != TYPE_CODE_FUNC
+ && TYPE_CODE (type) != TYPE_CODE_FLT
+ && !HAVE_GNAT_AUX_INFO (type))
+ INIT_GNAT_SPECIFIC (type);
- if (macinfo_type == DW_MACINFO_define)
- parse_macro_definition (current_file, line, body);
- else if (macinfo_type == DW_MACINFO_undef)
- macro_undef (current_file, line, body);
- }
- break;
+ if (cu->per_cu->from_debug_types)
+ type_hash_ptr = &dwarf2_per_objfile->debug_types_type_hash;
+ else
+ type_hash_ptr = &dwarf2_per_objfile->debug_info_type_hash;
- case DW_MACINFO_start_file:
- {
- unsigned int bytes_read;
- int line, file;
+ if (*type_hash_ptr == NULL)
+ {
+ *type_hash_ptr
+ = htab_create_alloc_ex (127,
+ offset_and_type_hash,
+ offset_and_type_eq,
+ NULL,
+ &objfile->objfile_obstack,
+ hashtab_obstack_allocate,
+ dummy_obstack_deallocate);
+ }
- line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
- mac_ptr += bytes_read;
- file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
- mac_ptr += bytes_read;
+ ofs.offset = die->offset;
+ ofs.type = type;
+ slot = (struct dwarf2_offset_and_type **)
+ htab_find_slot_with_hash (*type_hash_ptr, &ofs, ofs.offset, INSERT);
+ if (*slot)
+ complaint (&symfile_complaints,
+ _("A problem internal to GDB: DIE 0x%x has type already set"),
+ die->offset);
+ *slot = obstack_alloc (&objfile->objfile_obstack, sizeof (**slot));
+ **slot = ofs;
+ return type;
+}
- if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
- complaint (&symfile_complaints,
- _("debug info gives source %d included "
- "from %s at %s line %d"),
- file, at_commandline ? _("command-line") : _("file"),
- line == 0 ? _("zero") : _("non-zero"), line);
+/* Look up the type for the die at DIE_OFFSET in the appropriate type_hash
+ table, or return NULL if the die does not have a saved type. */
- if (at_commandline)
- {
- /* This DW_MACINFO_start_file was executed in the pass one. */
- at_commandline = 0;
- }
- else
- current_file = macro_start_file (file, line,
- current_file, comp_dir,
- lh, cu->objfile);
- }
- break;
+static struct type *
+get_die_type_at_offset (unsigned int offset,
+ struct dwarf2_per_cu_data *per_cu)
+{
+ struct dwarf2_offset_and_type *slot, ofs;
+ htab_t type_hash;
- case DW_MACINFO_end_file:
- if (! current_file)
- complaint (&symfile_complaints,
- _("macro debug info has an unmatched `close_file' directive"));
- else
- {
- current_file = current_file->included_by;
- if (! current_file)
- {
- enum dwarf_macinfo_record_type next_type;
+ if (per_cu->from_debug_types)
+ type_hash = dwarf2_per_objfile->debug_types_type_hash;
+ else
+ type_hash = dwarf2_per_objfile->debug_info_type_hash;
+ if (type_hash == NULL)
+ return NULL;
- /* GCC circa March 2002 doesn't produce the zero
- type byte marking the end of the compilation
- unit. Complain if it's not there, but exit no
- matter what. */
+ ofs.offset = offset;
+ slot = htab_find_with_hash (type_hash, &ofs, ofs.offset);
+ if (slot)
+ return slot->type;
+ else
+ return NULL;
+}
- /* Do we at least have room for a macinfo type byte? */
- if (mac_ptr >= mac_end)
- {
- dwarf2_macros_too_long_complaint ();
- return;
- }
+/* Look up the type for DIE in the appropriate type_hash table,
+ or return NULL if DIE does not have a saved type. */
- /* We don't increment mac_ptr here, so this is just
- a look-ahead. */
- next_type = read_1_byte (abfd, mac_ptr);
- if (next_type != 0)
- complaint (&symfile_complaints,
- _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
+static struct type *
+get_die_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ return get_die_type_at_offset (die->offset, cu->per_cu);
+}
- return;
- }
- }
- break;
+/* Add a dependence relationship from CU to REF_PER_CU. */
- case DW_MACINFO_vendor_ext:
- {
- unsigned int bytes_read;
- int constant;
- char *string;
+static void
+dwarf2_add_dependence (struct dwarf2_cu *cu,
+ struct dwarf2_per_cu_data *ref_per_cu)
+{
+ void **slot;
- constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
- mac_ptr += bytes_read;
- string = read_string (abfd, mac_ptr, &bytes_read);
- mac_ptr += bytes_read;
+ if (cu->dependencies == NULL)
+ cu->dependencies
+ = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
+ NULL, &cu->comp_unit_obstack,
+ hashtab_obstack_allocate,
+ dummy_obstack_deallocate);
- /* We don't recognize any vendor extensions. */
- }
- break;
- }
- } while (macinfo_type != 0);
+ slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
+ if (*slot == NULL)
+ *slot = ref_per_cu;
}
-/* Check if the attribute's form is a DW_FORM_block*
- if so return true else false. */
+/* Subroutine of dwarf2_mark to pass to htab_traverse.
+ Set the mark field in every compilation unit in the
+ cache that we must keep because we are keeping CU. */
+
static int
-attr_form_is_block (struct attribute *attr)
+dwarf2_mark_helper (void **slot, void *data)
{
- return (attr == NULL ? 0 :
- attr->form == DW_FORM_block1
- || attr->form == DW_FORM_block2
- || attr->form == DW_FORM_block4
- || attr->form == DW_FORM_block
- || attr->form == DW_FORM_exprloc);
-}
+ struct dwarf2_per_cu_data *per_cu;
-/* Return non-zero if ATTR's value is a section offset --- classes
- lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
- You may use DW_UNSND (attr) to retrieve such offsets.
+ per_cu = (struct dwarf2_per_cu_data *) *slot;
+ if (per_cu->cu->mark)
+ return 1;
+ per_cu->cu->mark = 1;
- Section 7.5.4, "Attribute Encodings", explains that no attribute
- may have a value that belongs to more than one of these classes; it
- would be ambiguous if we did, because we use the same forms for all
- of them. */
-static int
-attr_form_is_section_offset (struct attribute *attr)
-{
- return (attr->form == DW_FORM_data4
- || attr->form == DW_FORM_data8
- || attr->form == DW_FORM_sec_offset);
-}
+ if (per_cu->cu->dependencies != NULL)
+ htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
+ return 1;
+}
-/* Return non-zero if ATTR's value falls in the 'constant' class, or
- zero otherwise. When this function returns true, you can apply
- dwarf2_get_attr_constant_value to it.
+/* Set the mark field in CU and in every other compilation unit in the
+ cache that we must keep because we are keeping CU. */
- However, note that for some attributes you must check
- attr_form_is_section_offset before using this test. DW_FORM_data4
- and DW_FORM_data8 are members of both the constant class, and of
- the classes that contain offsets into other debug sections
- (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
- that, if an attribute's can be either a constant or one of the
- section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
- taken as section offsets, not constants. */
-static int
-attr_form_is_constant (struct attribute *attr)
+static void
+dwarf2_mark (struct dwarf2_cu *cu)
{
- switch (attr->form)
- {
- case DW_FORM_sdata:
- case DW_FORM_udata:
- case DW_FORM_data1:
- case DW_FORM_data2:
- case DW_FORM_data4:
- case DW_FORM_data8:
- return 1;
- default:
- return 0;
- }
+ if (cu->mark)
+ return;
+ cu->mark = 1;
+ if (cu->dependencies != NULL)
+ htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
}
static void
-dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
- struct dwarf2_cu *cu)
+dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
{
- if (attr_form_is_section_offset (attr)
- /* ".debug_loc" may not exist at all, or the offset may be outside
- the section. If so, fall through to the complaint in the
- other branch. */
- && DW_UNSND (attr) < dwarf2_per_objfile->loc.size)
+ while (per_cu)
{
- struct dwarf2_loclist_baton *baton;
-
- baton = obstack_alloc (&cu->objfile->objfile_obstack,
- sizeof (struct dwarf2_loclist_baton));
- baton->per_cu = cu->per_cu;
- gdb_assert (baton->per_cu);
+ per_cu->cu->mark = 0;
+ per_cu = per_cu->cu->read_in_chain;
+ }
+}
- dwarf2_read_section (dwarf2_per_objfile->objfile,
- &dwarf2_per_objfile->loc);
+/* Trivial hash function for partial_die_info: the hash value of a DIE
+ is its offset in .debug_info for this objfile. */
- /* We don't know how long the location list is, but make sure we
- don't run off the edge of the section. */
- baton->size = dwarf2_per_objfile->loc.size - DW_UNSND (attr);
- baton->data = dwarf2_per_objfile->loc.buffer + DW_UNSND (attr);
- baton->base_address = cu->base_address;
- if (cu->base_known == 0)
- complaint (&symfile_complaints,
- _("Location list used without specifying the CU base address."));
+static hashval_t
+partial_die_hash (const void *item)
+{
+ const struct partial_die_info *part_die = item;
- SYMBOL_COMPUTED_OPS (sym) = &dwarf2_loclist_funcs;
- SYMBOL_LOCATION_BATON (sym) = baton;
- }
- else
- {
- struct dwarf2_locexpr_baton *baton;
+ return part_die->offset;
+}
- baton = obstack_alloc (&cu->objfile->objfile_obstack,
- sizeof (struct dwarf2_locexpr_baton));
- baton->per_cu = cu->per_cu;
- gdb_assert (baton->per_cu);
+/* Trivial comparison function for partial_die_info structures: two DIEs
+ are equal if they have the same offset. */
- if (attr_form_is_block (attr))
- {
- /* Note that we're just copying the block's data pointer
- here, not the actual data. We're still pointing into the
- info_buffer for SYM's objfile; right now we never release
- that buffer, but when we do clean up properly this may
- need to change. */
- baton->size = DW_BLOCK (attr)->size;
- baton->data = DW_BLOCK (attr)->data;
- }
- else
- {
- dwarf2_invalid_attrib_class_complaint ("location description",
- SYMBOL_NATURAL_NAME (sym));
- baton->size = 0;
- baton->data = NULL;
- }
+static int
+partial_die_eq (const void *item_lhs, const void *item_rhs)
+{
+ const struct partial_die_info *part_die_lhs = item_lhs;
+ const struct partial_die_info *part_die_rhs = item_rhs;
- SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
- SYMBOL_LOCATION_BATON (sym) = baton;
- }
+ return part_die_lhs->offset == part_die_rhs->offset;
}
-/* Return the OBJFILE associated with the compilation unit CU. */
+static struct cmd_list_element *set_dwarf2_cmdlist;
+static struct cmd_list_element *show_dwarf2_cmdlist;
-struct objfile *
-dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu)
+static void
+set_dwarf2_cmd (char *args, int from_tty)
{
- struct objfile *objfile = per_cu->psymtab->objfile;
-
- /* Return the master objfile, so that we can report and look up the
- correct file containing this variable. */
- if (objfile->separate_debug_objfile_backlink)
- objfile = objfile->separate_debug_objfile_backlink;
+ help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
+}
- return objfile;
+static void
+show_dwarf2_cmd (char *args, int from_tty)
+{
+ cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
}
-/* Return the address size given in the compilation unit header for CU. */
+/* If section described by INFO was mmapped, munmap it now. */
-CORE_ADDR
-dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu)
+static void
+munmap_section_buffer (struct dwarf2_section_info *info)
{
- if (per_cu->cu)
- return per_cu->cu->header.addr_size;
- else
+ if (info->was_mmapped)
{
- /* If the CU is not currently read in, we re-read its header. */
- struct objfile *objfile = per_cu->psymtab->objfile;
- struct dwarf2_per_objfile *per_objfile
- = objfile_data (objfile, dwarf2_objfile_data_key);
- gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
- struct comp_unit_head cu_header;
+#ifdef HAVE_MMAP
+ intptr_t begin = (intptr_t) info->buffer;
+ intptr_t map_begin = begin & ~(pagesize - 1);
+ size_t map_length = info->size + begin - map_begin;
- memset (&cu_header, 0, sizeof cu_header);
- read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
- return cu_header.addr_size;
+ gdb_assert (munmap ((void *) map_begin, map_length) == 0);
+#else
+ /* Without HAVE_MMAP, we should never be here to begin with. */
+ gdb_assert_not_reached ("no mmap support");
+#endif
}
}
-/* Return the offset size given in the compilation unit header for CU. */
+/* munmap debug sections for OBJFILE, if necessary. */
-int
-dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu)
+static void
+dwarf2_per_objfile_free (struct objfile *objfile, void *d)
{
- if (per_cu->cu)
- return per_cu->cu->header.offset_size;
- else
- {
- /* If the CU is not currently read in, we re-read its header. */
- struct objfile *objfile = per_cu->psymtab->objfile;
- struct dwarf2_per_objfile *per_objfile
- = objfile_data (objfile, dwarf2_objfile_data_key);
- gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
- struct comp_unit_head cu_header;
+ struct dwarf2_per_objfile *data = d;
- memset (&cu_header, 0, sizeof cu_header);
- read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
- return cu_header.offset_size;
- }
+ /* This is sorted according to the order they're defined in to make it easier
+ to keep in sync. */
+ munmap_section_buffer (&data->info);
+ munmap_section_buffer (&data->abbrev);
+ munmap_section_buffer (&data->line);
+ munmap_section_buffer (&data->loc);
+ munmap_section_buffer (&data->macinfo);
+ munmap_section_buffer (&data->str);
+ munmap_section_buffer (&data->ranges);
+ munmap_section_buffer (&data->types);
+ munmap_section_buffer (&data->frame);
+ munmap_section_buffer (&data->eh_frame);
+ munmap_section_buffer (&data->gdb_index);
}
-/* Locate the .debug_info compilation unit from CU's objfile which contains
- the DIE at OFFSET. Raises an error on failure. */
+\f
+/* The "save gdb-index" command. */
-static struct dwarf2_per_cu_data *
-dwarf2_find_containing_comp_unit (unsigned int offset,
- struct objfile *objfile)
+/* The contents of the hash table we create when building the string
+ table. */
+struct strtab_entry
{
- struct dwarf2_per_cu_data *this_cu;
- int low, high;
-
- low = 0;
- high = dwarf2_per_objfile->n_comp_units - 1;
- while (high > low)
- {
- int mid = low + (high - low) / 2;
+ offset_type offset;
+ const char *str;
+};
- if (dwarf2_per_objfile->all_comp_units[mid]->offset >= offset)
- high = mid;
- else
- low = mid + 1;
- }
- gdb_assert (low == high);
- if (dwarf2_per_objfile->all_comp_units[low]->offset > offset)
- {
- if (low == 0)
- error (_("Dwarf Error: could not find partial DIE containing "
- "offset 0x%lx [in module %s]"),
- (long) offset, bfd_get_filename (objfile->obfd));
+/* Hash function for a strtab_entry. */
- gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset <= offset);
- return dwarf2_per_objfile->all_comp_units[low-1];
- }
- else
- {
- this_cu = dwarf2_per_objfile->all_comp_units[low];
- if (low == dwarf2_per_objfile->n_comp_units - 1
- && offset >= this_cu->offset + this_cu->length)
- error (_("invalid dwarf2 offset %u"), offset);
- gdb_assert (offset < this_cu->offset + this_cu->length);
- return this_cu;
- }
+static hashval_t
+hash_strtab_entry (const void *e)
+{
+ const struct strtab_entry *entry = e;
+ return mapped_index_string_hash (entry->str);
}
-/* Locate the compilation unit from OBJFILE which is located at exactly
- OFFSET. Raises an error on failure. */
+/* Equality function for a strtab_entry. */
-static struct dwarf2_per_cu_data *
-dwarf2_find_comp_unit (unsigned int offset, struct objfile *objfile)
+static int
+eq_strtab_entry (const void *a, const void *b)
{
- struct dwarf2_per_cu_data *this_cu;
-
- this_cu = dwarf2_find_containing_comp_unit (offset, objfile);
- if (this_cu->offset != offset)
- error (_("no compilation unit with offset %u."), offset);
- return this_cu;
+ const struct strtab_entry *ea = a;
+ const struct strtab_entry *eb = b;
+ return !strcmp (ea->str, eb->str);
}
-/* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
+/* Create a strtab_entry hash table. */
-static struct dwarf2_cu *
-alloc_one_comp_unit (struct objfile *objfile)
+static htab_t
+create_strtab (void)
{
- struct dwarf2_cu *cu = xcalloc (1, sizeof (struct dwarf2_cu));
- cu->objfile = objfile;
- obstack_init (&cu->comp_unit_obstack);
- return cu;
+ return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry,
+ xfree, xcalloc, xfree);
}
-/* Release one cached compilation unit, CU. We unlink it from the tree
- of compilation units, but we don't remove it from the read_in_chain;
- the caller is responsible for that.
- NOTE: DATA is a void * because this function is also used as a
- cleanup routine. */
+/* Add a string to the constant pool. Return the string's offset in
+ host order. */
-static void
-free_one_comp_unit (void *data)
+static offset_type
+add_string (htab_t table, struct obstack *cpool, const char *str)
{
- struct dwarf2_cu *cu = data;
+ void **slot;
+ struct strtab_entry entry;
+ struct strtab_entry *result;
- if (cu->per_cu != NULL)
- cu->per_cu->cu = NULL;
- cu->per_cu = NULL;
+ entry.str = str;
+ slot = htab_find_slot (table, &entry, INSERT);
+ if (*slot)
+ result = *slot;
+ else
+ {
+ result = XNEW (struct strtab_entry);
+ result->offset = obstack_object_size (cpool);
+ result->str = str;
+ obstack_grow_str0 (cpool, str);
+ *slot = result;
+ }
+ return result->offset;
+}
- obstack_free (&cu->comp_unit_obstack, NULL);
+/* An entry in the symbol table. */
+struct symtab_index_entry
+{
+ /* The name of the symbol. */
+ const char *name;
+ /* The offset of the name in the constant pool. */
+ offset_type index_offset;
+ /* A sorted vector of the indices of all the CUs that hold an object
+ of this name. */
+ VEC (offset_type) *cu_indices;
+};
- xfree (cu);
+/* The symbol table. This is a power-of-2-sized hash table. */
+struct mapped_symtab
+{
+ offset_type n_elements;
+ offset_type size;
+ struct symtab_index_entry **data;
+};
+
+/* Hash function for a symtab_index_entry. */
+
+static hashval_t
+hash_symtab_entry (const void *e)
+{
+ const struct symtab_index_entry *entry = e;
+ return iterative_hash (VEC_address (offset_type, entry->cu_indices),
+ sizeof (offset_type) * VEC_length (offset_type,
+ entry->cu_indices),
+ 0);
}
-/* This cleanup function is passed the address of a dwarf2_cu on the stack
- when we're finished with it. We can't free the pointer itself, but be
- sure to unlink it from the cache. Also release any associated storage
- and perform cache maintenance.
+/* Equality function for a symtab_index_entry. */
- Only used during partial symbol parsing. */
+static int
+eq_symtab_entry (const void *a, const void *b)
+{
+ const struct symtab_index_entry *ea = a;
+ const struct symtab_index_entry *eb = b;
+ int len = VEC_length (offset_type, ea->cu_indices);
+ if (len != VEC_length (offset_type, eb->cu_indices))
+ return 0;
+ return !memcmp (VEC_address (offset_type, ea->cu_indices),
+ VEC_address (offset_type, eb->cu_indices),
+ sizeof (offset_type) * len);
+}
+
+/* Destroy a symtab_index_entry. */
static void
-free_stack_comp_unit (void *data)
+delete_symtab_entry (void *p)
{
- struct dwarf2_cu *cu = data;
+ struct symtab_index_entry *entry = p;
+ VEC_free (offset_type, entry->cu_indices);
+ xfree (entry);
+}
- obstack_free (&cu->comp_unit_obstack, NULL);
- cu->partial_dies = NULL;
+/* Create a hash table holding symtab_index_entry objects. */
- if (cu->per_cu != NULL)
- {
- /* This compilation unit is on the stack in our caller, so we
- should not xfree it. Just unlink it. */
- cu->per_cu->cu = NULL;
- cu->per_cu = NULL;
+static htab_t
+create_symbol_hash_table (void)
+{
+ return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry,
+ delete_symtab_entry, xcalloc, xfree);
+}
- /* If we had a per-cu pointer, then we may have other compilation
- units loaded, so age them now. */
- age_cached_comp_units ();
- }
+/* Create a new mapped symtab object. */
+
+static struct mapped_symtab *
+create_mapped_symtab (void)
+{
+ struct mapped_symtab *symtab = XNEW (struct mapped_symtab);
+ symtab->n_elements = 0;
+ symtab->size = 1024;
+ symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
+ return symtab;
}
-/* Free all cached compilation units. */
+/* Destroy a mapped_symtab. */
static void
-free_cached_comp_units (void *data)
+cleanup_mapped_symtab (void *p)
{
- struct dwarf2_per_cu_data *per_cu, **last_chain;
+ struct mapped_symtab *symtab = p;
+ /* The contents of the array are freed when the other hash table is
+ destroyed. */
+ xfree (symtab->data);
+ xfree (symtab);
+}
- per_cu = dwarf2_per_objfile->read_in_chain;
- last_chain = &dwarf2_per_objfile->read_in_chain;
- while (per_cu != NULL)
- {
- struct dwarf2_per_cu_data *next_cu;
+/* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
+ the slot. */
- next_cu = per_cu->cu->read_in_chain;
+static struct symtab_index_entry **
+find_slot (struct mapped_symtab *symtab, const char *name)
+{
+ offset_type index, step, hash = mapped_index_string_hash (name);
- free_one_comp_unit (per_cu->cu);
- *last_chain = next_cu;
+ index = hash & (symtab->size - 1);
+ step = ((hash * 17) & (symtab->size - 1)) | 1;
- per_cu = next_cu;
+ for (;;)
+ {
+ if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name))
+ return &symtab->data[index];
+ index = (index + step) & (symtab->size - 1);
}
}
-/* Increase the age counter on each cached compilation unit, and free
- any that are too old. */
+/* Expand SYMTAB's hash table. */
static void
-age_cached_comp_units (void)
+hash_expand (struct mapped_symtab *symtab)
{
- struct dwarf2_per_cu_data *per_cu, **last_chain;
+ offset_type old_size = symtab->size;
+ offset_type i;
+ struct symtab_index_entry **old_entries = symtab->data;
- dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
- per_cu = dwarf2_per_objfile->read_in_chain;
- while (per_cu != NULL)
+ symtab->size *= 2;
+ symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
+
+ for (i = 0; i < old_size; ++i)
{
- per_cu->cu->last_used ++;
- if (per_cu->cu->last_used <= dwarf2_max_cache_age)
- dwarf2_mark (per_cu->cu);
- per_cu = per_cu->cu->read_in_chain;
+ if (old_entries[i])
+ {
+ struct symtab_index_entry **slot = find_slot (symtab,
+ old_entries[i]->name);
+ *slot = old_entries[i];
+ }
}
- per_cu = dwarf2_per_objfile->read_in_chain;
- last_chain = &dwarf2_per_objfile->read_in_chain;
- while (per_cu != NULL)
- {
- struct dwarf2_per_cu_data *next_cu;
+ xfree (old_entries);
+}
- next_cu = per_cu->cu->read_in_chain;
+/* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
+ is the index of the CU in which the symbol appears. */
- if (!per_cu->cu->mark)
- {
- free_one_comp_unit (per_cu->cu);
- *last_chain = next_cu;
- }
- else
- last_chain = &per_cu->cu->read_in_chain;
+static void
+add_index_entry (struct mapped_symtab *symtab, const char *name,
+ offset_type cu_index)
+{
+ struct symtab_index_entry **slot;
- per_cu = next_cu;
+ ++symtab->n_elements;
+ if (4 * symtab->n_elements / 3 >= symtab->size)
+ hash_expand (symtab);
+
+ slot = find_slot (symtab, name);
+ if (!*slot)
+ {
+ *slot = XNEW (struct symtab_index_entry);
+ (*slot)->name = name;
+ (*slot)->cu_indices = NULL;
}
+ /* Don't push an index twice. Due to how we add entries we only
+ have to check the last one. */
+ if (VEC_empty (offset_type, (*slot)->cu_indices)
+ || VEC_length (offset_type, (*slot)->cu_indices) != cu_index)
+ VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index);
}
-/* Remove a single compilation unit from the cache. */
+/* Add a vector of indices to the constant pool. */
-static void
-free_one_cached_comp_unit (void *target_cu)
+static offset_type
+add_indices_to_cpool (htab_t symbol_hash_table, struct obstack *cpool,
+ struct symtab_index_entry *entry)
{
- struct dwarf2_per_cu_data *per_cu, **last_chain;
+ void **slot;
- per_cu = dwarf2_per_objfile->read_in_chain;
- last_chain = &dwarf2_per_objfile->read_in_chain;
- while (per_cu != NULL)
+ slot = htab_find_slot (symbol_hash_table, entry, INSERT);
+ if (!*slot)
{
- struct dwarf2_per_cu_data *next_cu;
+ offset_type len = VEC_length (offset_type, entry->cu_indices);
+ offset_type val = MAYBE_SWAP (len);
+ offset_type iter;
+ int i;
- next_cu = per_cu->cu->read_in_chain;
+ *slot = entry;
+ entry->index_offset = obstack_object_size (cpool);
- if (per_cu->cu == target_cu)
+ obstack_grow (cpool, &val, sizeof (val));
+ for (i = 0;
+ VEC_iterate (offset_type, entry->cu_indices, i, iter);
+ ++i)
{
- free_one_comp_unit (per_cu->cu);
- *last_chain = next_cu;
- break;
- }
- else
- last_chain = &per_cu->cu->read_in_chain;
-
- per_cu = next_cu;
+ val = MAYBE_SWAP (iter);
+ obstack_grow (cpool, &val, sizeof (val));
+ }
+ }
+ else
+ {
+ struct symtab_index_entry *old_entry = *slot;
+ entry->index_offset = old_entry->index_offset;
+ entry = old_entry;
}
+ return entry->index_offset;
}
-/* Release all extra memory associated with OBJFILE. */
+/* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
+ constant pool entries going into the obstack CPOOL. */
-void
-dwarf2_free_objfile (struct objfile *objfile)
+static void
+write_hash_table (struct mapped_symtab *symtab,
+ struct obstack *output, struct obstack *cpool)
{
- dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
+ offset_type i;
+ htab_t symbol_hash_table;
+ htab_t str_table;
- if (dwarf2_per_objfile == NULL)
- return;
+ symbol_hash_table = create_symbol_hash_table ();
+ str_table = create_strtab ();
- /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
- free_cached_comp_units (NULL);
+ /* We add all the index vectors to the constant pool first, to
+ ensure alignment is ok. */
+ for (i = 0; i < symtab->size; ++i)
+ {
+ if (symtab->data[i])
+ add_indices_to_cpool (symbol_hash_table, cpool, symtab->data[i]);
+ }
- /* Everything else should be on the objfile obstack. */
-}
+ /* Now write out the hash table. */
+ for (i = 0; i < symtab->size; ++i)
+ {
+ offset_type str_off, vec_off;
-/* A pair of DIE offset and GDB type pointer. We store these
- in a hash table separate from the DIEs, and preserve them
- when the DIEs are flushed out of cache. */
+ if (symtab->data[i])
+ {
+ str_off = add_string (str_table, cpool, symtab->data[i]->name);
+ vec_off = symtab->data[i]->index_offset;
+ }
+ else
+ {
+ /* While 0 is a valid constant pool index, it is not valid
+ to have 0 for both offsets. */
+ str_off = 0;
+ vec_off = 0;
+ }
-struct dwarf2_offset_and_type
+ str_off = MAYBE_SWAP (str_off);
+ vec_off = MAYBE_SWAP (vec_off);
+
+ obstack_grow (output, &str_off, sizeof (str_off));
+ obstack_grow (output, &vec_off, sizeof (vec_off));
+ }
+
+ htab_delete (str_table);
+ htab_delete (symbol_hash_table);
+}
+
+/* Struct to map psymtab to CU index in the index file. */
+struct psymtab_cu_index_map
{
- unsigned int offset;
- struct type *type;
+ struct partial_symtab *psymtab;
+ unsigned int cu_index;
};
-/* Hash function for a dwarf2_offset_and_type. */
-
static hashval_t
-offset_and_type_hash (const void *item)
+hash_psymtab_cu_index (const void *item)
{
- const struct dwarf2_offset_and_type *ofs = item;
+ const struct psymtab_cu_index_map *map = item;
- return ofs->offset;
+ return htab_hash_pointer (map->psymtab);
}
-/* Equality function for a dwarf2_offset_and_type. */
-
static int
-offset_and_type_eq (const void *item_lhs, const void *item_rhs)
+eq_psymtab_cu_index (const void *item_lhs, const void *item_rhs)
{
- const struct dwarf2_offset_and_type *ofs_lhs = item_lhs;
- const struct dwarf2_offset_and_type *ofs_rhs = item_rhs;
+ const struct psymtab_cu_index_map *lhs = item_lhs;
+ const struct psymtab_cu_index_map *rhs = item_rhs;
- return ofs_lhs->offset == ofs_rhs->offset;
+ return lhs->psymtab == rhs->psymtab;
}
-/* Set the type associated with DIE to TYPE. Save it in CU's hash
- table if necessary. For convenience, return TYPE.
-
- The DIEs reading must have careful ordering to:
- * Not cause infite loops trying to read in DIEs as a prerequisite for
- reading current DIE.
- * Not trying to dereference contents of still incompletely read in types
- while reading in other DIEs.
- * Enable referencing still incompletely read in types just by a pointer to
- the type without accessing its fields.
+/* Helper struct for building the address table. */
+struct addrmap_index_data
+{
+ struct objfile *objfile;
+ struct obstack *addr_obstack;
+ htab_t cu_index_htab;
+
+ /* Non-zero if the previous_* fields are valid.
+ We can't write an entry until we see the next entry (since it is only then
+ that we know the end of the entry). */
+ int previous_valid;
+ /* Index of the CU in the table of all CUs in the index file. */
+ unsigned int previous_cu_index;
+ /* Start address of the CU. */
+ CORE_ADDR previous_cu_start;
+};
- Therefore caller should follow these rules:
- * Try to fetch any prerequisite types we may need to build this DIE type
- before building the type and calling set_die_type.
- * After building typer call set_die_type for current DIE as soon as
- possible before fetching more types to complete the current type.
- * Make the type as complete as possible before fetching more types. */
+/* Write an address entry to OBSTACK. */
-static struct type *
-set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
+static void
+add_address_entry (struct objfile *objfile, struct obstack *obstack,
+ CORE_ADDR start, CORE_ADDR end, unsigned int cu_index)
{
- struct dwarf2_offset_and_type **slot, ofs;
-
- /* For Ada types, make sure that the gnat-specific data is always
- initialized (if not already set). There are a few types where
- we should not be doing so, because the type-specific area is
- already used to hold some other piece of info (eg: TYPE_CODE_FLT
- where the type-specific area is used to store the floatformat).
- But this is not a problem, because the gnat-specific information
- is actually not needed for these types. */
- if (need_gnat_info (cu)
- && TYPE_CODE (type) != TYPE_CODE_FUNC
- && TYPE_CODE (type) != TYPE_CODE_FLT
- && !HAVE_GNAT_AUX_INFO (type))
- INIT_GNAT_SPECIFIC (type);
+ offset_type cu_index_to_write;
+ char addr[8];
+ CORE_ADDR baseaddr;
- if (cu->type_hash == NULL)
- {
- gdb_assert (cu->per_cu != NULL);
- cu->per_cu->type_hash
- = htab_create_alloc_ex (cu->header.length / 24,
- offset_and_type_hash,
- offset_and_type_eq,
- NULL,
- &cu->objfile->objfile_obstack,
- hashtab_obstack_allocate,
- dummy_obstack_deallocate);
- cu->type_hash = cu->per_cu->type_hash;
- }
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
- ofs.offset = die->offset;
- ofs.type = type;
- slot = (struct dwarf2_offset_and_type **)
- htab_find_slot_with_hash (cu->type_hash, &ofs, ofs.offset, INSERT);
- if (*slot)
- complaint (&symfile_complaints,
- _("A problem internal to GDB: DIE 0x%x has type already set"),
- die->offset);
- *slot = obstack_alloc (&cu->objfile->objfile_obstack, sizeof (**slot));
- **slot = ofs;
- return type;
+ store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, start - baseaddr);
+ obstack_grow (obstack, addr, 8);
+ store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, end - baseaddr);
+ obstack_grow (obstack, addr, 8);
+ cu_index_to_write = MAYBE_SWAP (cu_index);
+ obstack_grow (obstack, &cu_index_to_write, sizeof (offset_type));
}
-/* Find the type for DIE in CU's type_hash, or return NULL if DIE does
- not have a saved type. */
+/* Worker function for traversing an addrmap to build the address table. */
-static struct type *
-get_die_type (struct die_info *die, struct dwarf2_cu *cu)
+static int
+add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj)
{
- struct dwarf2_offset_and_type *slot, ofs;
- htab_t type_hash = cu->type_hash;
+ struct addrmap_index_data *data = datap;
+ struct partial_symtab *pst = obj;
+ offset_type cu_index;
+ void **slot;
- if (type_hash == NULL)
- return NULL;
+ if (data->previous_valid)
+ add_address_entry (data->objfile, data->addr_obstack,
+ data->previous_cu_start, start_addr,
+ data->previous_cu_index);
- ofs.offset = die->offset;
- slot = htab_find_with_hash (type_hash, &ofs, ofs.offset);
- if (slot)
- return slot->type;
+ data->previous_cu_start = start_addr;
+ if (pst != NULL)
+ {
+ struct psymtab_cu_index_map find_map, *map;
+ find_map.psymtab = pst;
+ map = htab_find (data->cu_index_htab, &find_map);
+ gdb_assert (map != NULL);
+ data->previous_cu_index = map->cu_index;
+ data->previous_valid = 1;
+ }
else
- return NULL;
+ data->previous_valid = 0;
+
+ return 0;
}
-/* Add a dependence relationship from CU to REF_PER_CU. */
+/* Write OBJFILE's address map to OBSTACK.
+ CU_INDEX_HTAB is used to map addrmap entries to their CU indices
+ in the index file. */
static void
-dwarf2_add_dependence (struct dwarf2_cu *cu,
- struct dwarf2_per_cu_data *ref_per_cu)
+write_address_map (struct objfile *objfile, struct obstack *obstack,
+ htab_t cu_index_htab)
{
- void **slot;
+ struct addrmap_index_data addrmap_index_data;
- if (cu->dependencies == NULL)
- cu->dependencies
- = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
- NULL, &cu->comp_unit_obstack,
- hashtab_obstack_allocate,
- dummy_obstack_deallocate);
+ /* When writing the address table, we have to cope with the fact that
+ the addrmap iterator only provides the start of a region; we have to
+ wait until the next invocation to get the start of the next region. */
- slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
- if (*slot == NULL)
- *slot = ref_per_cu;
+ addrmap_index_data.objfile = objfile;
+ addrmap_index_data.addr_obstack = obstack;
+ addrmap_index_data.cu_index_htab = cu_index_htab;
+ addrmap_index_data.previous_valid = 0;
+
+ addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker,
+ &addrmap_index_data);
+
+ /* It's highly unlikely the last entry (end address = 0xff...ff)
+ is valid, but we should still handle it.
+ The end address is recorded as the start of the next region, but that
+ doesn't work here. To cope we pass 0xff...ff, this is a rare situation
+ anyway. */
+ if (addrmap_index_data.previous_valid)
+ add_address_entry (objfile, obstack,
+ addrmap_index_data.previous_cu_start, (CORE_ADDR) -1,
+ addrmap_index_data.previous_cu_index);
}
-/* Subroutine of dwarf2_mark to pass to htab_traverse.
- Set the mark field in every compilation unit in the
- cache that we must keep because we are keeping CU. */
+/* Add a list of partial symbols to SYMTAB. */
-static int
-dwarf2_mark_helper (void **slot, void *data)
+static void
+write_psymbols (struct mapped_symtab *symtab,
+ htab_t psyms_seen,
+ struct partial_symbol **psymp,
+ int count,
+ offset_type cu_index,
+ int is_static)
{
- struct dwarf2_per_cu_data *per_cu;
+ for (; count-- > 0; ++psymp)
+ {
+ void **slot, *lookup;
- per_cu = (struct dwarf2_per_cu_data *) *slot;
- if (per_cu->cu->mark)
- return 1;
- per_cu->cu->mark = 1;
+ if (SYMBOL_LANGUAGE (*psymp) == language_ada)
+ error (_("Ada is not currently supported by the index"));
- if (per_cu->cu->dependencies != NULL)
- htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
+ /* We only want to add a given psymbol once. However, we also
+ want to account for whether it is global or static. So, we
+ may add it twice, using slightly different values. */
+ if (is_static)
+ {
+ uintptr_t val = 1 | (uintptr_t) *psymp;
- return 1;
+ lookup = (void *) val;
+ }
+ else
+ lookup = *psymp;
+
+ /* Only add a given psymbol once. */
+ slot = htab_find_slot (psyms_seen, lookup, INSERT);
+ if (!*slot)
+ {
+ *slot = lookup;
+ add_index_entry (symtab, SYMBOL_NATURAL_NAME (*psymp), cu_index);
+ }
+ }
}
-/* Set the mark field in CU and in every other compilation unit in the
- cache that we must keep because we are keeping CU. */
+/* Write the contents of an ("unfinished") obstack to FILE. Throw an
+ exception if there is an error. */
static void
-dwarf2_mark (struct dwarf2_cu *cu)
+write_obstack (FILE *file, struct obstack *obstack)
{
- if (cu->mark)
- return;
- cu->mark = 1;
- if (cu->dependencies != NULL)
- htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
+ if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack),
+ file)
+ != obstack_object_size (obstack))
+ error (_("couldn't data write to file"));
}
+/* Unlink a file if the argument is not NULL. */
+
static void
-dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
+unlink_if_set (void *p)
{
- while (per_cu)
- {
- per_cu->cu->mark = 0;
- per_cu = per_cu->cu->read_in_chain;
- }
+ char **filename = p;
+ if (*filename)
+ unlink (*filename);
}
-/* Trivial hash function for partial_die_info: the hash value of a DIE
- is its offset in .debug_info for this objfile. */
-
-static hashval_t
-partial_die_hash (const void *item)
+/* A helper struct used when iterating over debug_types. */
+struct signatured_type_index_data
{
- const struct partial_die_info *part_die = item;
-
- return part_die->offset;
-}
+ struct objfile *objfile;
+ struct mapped_symtab *symtab;
+ struct obstack *types_list;
+ htab_t psyms_seen;
+ int cu_index;
+};
-/* Trivial comparison function for partial_die_info structures: two DIEs
- are equal if they have the same offset. */
+/* A helper function that writes a single signatured_type to an
+ obstack. */
static int
-partial_die_eq (const void *item_lhs, const void *item_rhs)
+write_one_signatured_type (void **slot, void *d)
{
- const struct partial_die_info *part_die_lhs = item_lhs;
- const struct partial_die_info *part_die_rhs = item_rhs;
+ struct signatured_type_index_data *info = d;
+ struct signatured_type *entry = (struct signatured_type *) *slot;
+ struct dwarf2_per_cu_data *per_cu = &entry->per_cu;
+ struct partial_symtab *psymtab = per_cu->v.psymtab;
+ gdb_byte val[8];
+
+ write_psymbols (info->symtab,
+ info->psyms_seen,
+ info->objfile->global_psymbols.list
+ + psymtab->globals_offset,
+ psymtab->n_global_syms, info->cu_index,
+ 0);
+ write_psymbols (info->symtab,
+ info->psyms_seen,
+ info->objfile->static_psymbols.list
+ + psymtab->statics_offset,
+ psymtab->n_static_syms, info->cu_index,
+ 1);
+
+ store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->offset);
+ obstack_grow (info->types_list, val, 8);
+ store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->type_offset);
+ obstack_grow (info->types_list, val, 8);
+ store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature);
+ obstack_grow (info->types_list, val, 8);
+
+ ++info->cu_index;
- return part_die_lhs->offset == part_die_rhs->offset;
+ return 1;
}
-static struct cmd_list_element *set_dwarf2_cmdlist;
-static struct cmd_list_element *show_dwarf2_cmdlist;
+/* A cleanup function for an htab_t. */
static void
-set_dwarf2_cmd (char *args, int from_tty)
+cleanup_htab (void *arg)
{
- help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
+ htab_delete (arg);
}
+/* Create an index file for OBJFILE in the directory DIR. */
+
static void
-show_dwarf2_cmd (char *args, int from_tty)
+write_psymtabs_to_index (struct objfile *objfile, const char *dir)
{
- cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
-}
+ struct cleanup *cleanup;
+ char *filename, *cleanup_filename;
+ struct obstack contents, addr_obstack, constant_pool, symtab_obstack;
+ struct obstack cu_list, types_cu_list;
+ int i;
+ FILE *out_file;
+ struct mapped_symtab *symtab;
+ offset_type val, size_of_contents, total_len;
+ struct stat st;
+ char buf[8];
+ htab_t psyms_seen;
+ htab_t cu_index_htab;
+ struct psymtab_cu_index_map *psymtab_cu_index_map;
+
+ if (!objfile->psymtabs)
+ return;
+ if (dwarf2_per_objfile->using_index)
+ error (_("Cannot use an index to create the index"));
+
+ if (stat (objfile->name, &st) < 0)
+ perror_with_name (objfile->name);
+
+ filename = concat (dir, SLASH_STRING, lbasename (objfile->name),
+ INDEX_SUFFIX, (char *) NULL);
+ cleanup = make_cleanup (xfree, filename);
+
+ out_file = fopen (filename, "wb");
+ if (!out_file)
+ error (_("Can't open `%s' for writing"), filename);
+
+ cleanup_filename = filename;
+ make_cleanup (unlink_if_set, &cleanup_filename);
+
+ symtab = create_mapped_symtab ();
+ make_cleanup (cleanup_mapped_symtab, symtab);
+
+ obstack_init (&addr_obstack);
+ make_cleanup_obstack_free (&addr_obstack);
+
+ obstack_init (&cu_list);
+ make_cleanup_obstack_free (&cu_list);
+
+ obstack_init (&types_cu_list);
+ make_cleanup_obstack_free (&types_cu_list);
+
+ psyms_seen = htab_create_alloc (100, htab_hash_pointer, htab_eq_pointer,
+ NULL, xcalloc, xfree);
+ make_cleanup (cleanup_htab, psyms_seen);
+
+ /* While we're scanning CU's create a table that maps a psymtab pointer
+ (which is what addrmap records) to its index (which is what is recorded
+ in the index file). This will later be needed to write the address
+ table. */
+ cu_index_htab = htab_create_alloc (100,
+ hash_psymtab_cu_index,
+ eq_psymtab_cu_index,
+ NULL, xcalloc, xfree);
+ make_cleanup (cleanup_htab, cu_index_htab);
+ psymtab_cu_index_map = (struct psymtab_cu_index_map *)
+ xmalloc (sizeof (struct psymtab_cu_index_map)
+ * dwarf2_per_objfile->n_comp_units);
+ make_cleanup (xfree, psymtab_cu_index_map);
+
+ /* The CU list is already sorted, so we don't need to do additional
+ work here. Also, the debug_types entries do not appear in
+ all_comp_units, but only in their own hash table. */
+ for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
+ {
+ struct dwarf2_per_cu_data *per_cu
+ = dwarf2_per_objfile->all_comp_units[i];
+ struct partial_symtab *psymtab = per_cu->v.psymtab;
+ gdb_byte val[8];
+ struct psymtab_cu_index_map *map;
+ void **slot;
-/* If section described by INFO was mmapped, munmap it now. */
+ write_psymbols (symtab,
+ psyms_seen,
+ objfile->global_psymbols.list + psymtab->globals_offset,
+ psymtab->n_global_syms, i,
+ 0);
+ write_psymbols (symtab,
+ psyms_seen,
+ objfile->static_psymbols.list + psymtab->statics_offset,
+ psymtab->n_static_syms, i,
+ 1);
+
+ map = &psymtab_cu_index_map[i];
+ map->psymtab = psymtab;
+ map->cu_index = i;
+ slot = htab_find_slot (cu_index_htab, map, INSERT);
+ gdb_assert (slot != NULL);
+ gdb_assert (*slot == NULL);
+ *slot = map;
-static void
-munmap_section_buffer (struct dwarf2_section_info *info)
-{
- if (info->was_mmapped)
+ store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->offset);
+ obstack_grow (&cu_list, val, 8);
+ store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length);
+ obstack_grow (&cu_list, val, 8);
+ }
+
+ /* Dump the address map. */
+ write_address_map (objfile, &addr_obstack, cu_index_htab);
+
+ /* Write out the .debug_type entries, if any. */
+ if (dwarf2_per_objfile->signatured_types)
{
-#ifdef HAVE_MMAP
- intptr_t begin = (intptr_t) info->buffer;
- intptr_t map_begin = begin & ~(pagesize - 1);
- size_t map_length = info->size + begin - map_begin;
+ struct signatured_type_index_data sig_data;
- gdb_assert (munmap ((void *) map_begin, map_length) == 0);
-#else
- /* Without HAVE_MMAP, we should never be here to begin with. */
- gdb_assert (0);
-#endif
+ sig_data.objfile = objfile;
+ sig_data.symtab = symtab;
+ sig_data.types_list = &types_cu_list;
+ sig_data.psyms_seen = psyms_seen;
+ sig_data.cu_index = dwarf2_per_objfile->n_comp_units;
+ htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
+ write_one_signatured_type, &sig_data);
}
+
+ obstack_init (&constant_pool);
+ make_cleanup_obstack_free (&constant_pool);
+ obstack_init (&symtab_obstack);
+ make_cleanup_obstack_free (&symtab_obstack);
+ write_hash_table (symtab, &symtab_obstack, &constant_pool);
+
+ obstack_init (&contents);
+ make_cleanup_obstack_free (&contents);
+ size_of_contents = 6 * sizeof (offset_type);
+ total_len = size_of_contents;
+
+ /* The version number. */
+ val = MAYBE_SWAP (4);
+ obstack_grow (&contents, &val, sizeof (val));
+
+ /* The offset of the CU list from the start of the file. */
+ val = MAYBE_SWAP (total_len);
+ obstack_grow (&contents, &val, sizeof (val));
+ total_len += obstack_object_size (&cu_list);
+
+ /* The offset of the types CU list from the start of the file. */
+ val = MAYBE_SWAP (total_len);
+ obstack_grow (&contents, &val, sizeof (val));
+ total_len += obstack_object_size (&types_cu_list);
+
+ /* The offset of the address table from the start of the file. */
+ val = MAYBE_SWAP (total_len);
+ obstack_grow (&contents, &val, sizeof (val));
+ total_len += obstack_object_size (&addr_obstack);
+
+ /* The offset of the symbol table from the start of the file. */
+ val = MAYBE_SWAP (total_len);
+ obstack_grow (&contents, &val, sizeof (val));
+ total_len += obstack_object_size (&symtab_obstack);
+
+ /* The offset of the constant pool from the start of the file. */
+ val = MAYBE_SWAP (total_len);
+ obstack_grow (&contents, &val, sizeof (val));
+ total_len += obstack_object_size (&constant_pool);
+
+ gdb_assert (obstack_object_size (&contents) == size_of_contents);
+
+ write_obstack (out_file, &contents);
+ write_obstack (out_file, &cu_list);
+ write_obstack (out_file, &types_cu_list);
+ write_obstack (out_file, &addr_obstack);
+ write_obstack (out_file, &symtab_obstack);
+ write_obstack (out_file, &constant_pool);
+
+ fclose (out_file);
+
+ /* We want to keep the file, so we set cleanup_filename to NULL
+ here. See unlink_if_set. */
+ cleanup_filename = NULL;
+
+ do_cleanups (cleanup);
}
-/* munmap debug sections for OBJFILE, if necessary. */
+/* The mapped index file format is designed to be directly mmap()able
+ on any architecture. In most cases, a datum is represented using a
+ little-endian 32-bit integer value, called an offset_type. Big
+ endian machines must byte-swap the values before using them.
+ Exceptions to this rule are noted. The data is laid out such that
+ alignment is always respected.
+
+ A mapped index consists of several sections.
+
+ 1. The file header. This is a sequence of values, of offset_type
+ unless otherwise noted:
+
+ [0] The version number, currently 4. Versions 1, 2 and 3 are
+ obsolete.
+ [1] The offset, from the start of the file, of the CU list.
+ [2] The offset, from the start of the file, of the types CU list.
+ Note that this section can be empty, in which case this offset will
+ be equal to the next offset.
+ [3] The offset, from the start of the file, of the address section.
+ [4] The offset, from the start of the file, of the symbol table.
+ [5] The offset, from the start of the file, of the constant pool.
+
+ 2. The CU list. This is a sequence of pairs of 64-bit
+ little-endian values, sorted by the CU offset. The first element
+ in each pair is the offset of a CU in the .debug_info section. The
+ second element in each pair is the length of that CU. References
+ to a CU elsewhere in the map are done using a CU index, which is
+ just the 0-based index into this table. Note that if there are
+ type CUs, then conceptually CUs and type CUs form a single list for
+ the purposes of CU indices.
+
+ 3. The types CU list. This is a sequence of triplets of 64-bit
+ little-endian values. In a triplet, the first value is the CU
+ offset, the second value is the type offset in the CU, and the
+ third value is the type signature. The types CU list is not
+ sorted.
+
+ 4. The address section. The address section consists of a sequence
+ of address entries. Each address entry has three elements.
+ [0] The low address. This is a 64-bit little-endian value.
+ [1] The high address. This is a 64-bit little-endian value.
+ Like DW_AT_high_pc, the value is one byte beyond the end.
+ [2] The CU index. This is an offset_type value.
+
+ 5. The symbol table. This is a hash table. The size of the hash
+ table is always a power of 2. The initial hash and the step are
+ currently defined by the `find_slot' function.
+
+ Each slot in the hash table consists of a pair of offset_type
+ values. The first value is the offset of the symbol's name in the
+ constant pool. The second value is the offset of the CU vector in
+ the constant pool.
+
+ If both values are 0, then this slot in the hash table is empty.
+ This is ok because while 0 is a valid constant pool index, it
+ cannot be a valid index for both a string and a CU vector.
+
+ A string in the constant pool is stored as a \0-terminated string,
+ as you'd expect.
+
+ A CU vector in the constant pool is a sequence of offset_type
+ values. The first value is the number of CU indices in the vector.
+ Each subsequent value is the index of a CU in the CU list. This
+ element in the hash table is used to indicate which CUs define the
+ symbol.
+
+ 6. The constant pool. This is simply a bunch of bytes. It is
+ organized so that alignment is correct: CU vectors are stored
+ first, followed by strings. */
static void
-dwarf2_per_objfile_free (struct objfile *objfile, void *d)
+save_gdb_index_command (char *arg, int from_tty)
{
- struct dwarf2_per_objfile *data = d;
+ struct objfile *objfile;
- munmap_section_buffer (&data->info);
- munmap_section_buffer (&data->abbrev);
- munmap_section_buffer (&data->line);
- munmap_section_buffer (&data->str);
- munmap_section_buffer (&data->macinfo);
- munmap_section_buffer (&data->ranges);
- munmap_section_buffer (&data->loc);
- munmap_section_buffer (&data->frame);
- munmap_section_buffer (&data->eh_frame);
+ if (!arg || !*arg)
+ error (_("usage: save gdb-index DIRECTORY"));
+
+ ALL_OBJFILES (objfile)
+ {
+ struct stat st;
+
+ /* If the objfile does not correspond to an actual file, skip it. */
+ if (stat (objfile->name, &st) < 0)
+ continue;
+
+ dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
+ if (dwarf2_per_objfile)
+ {
+ volatile struct gdb_exception except;
+
+ TRY_CATCH (except, RETURN_MASK_ERROR)
+ {
+ write_psymtabs_to_index (objfile, arg);
+ }
+ if (except.reason < 0)
+ exception_fprintf (gdb_stderr, except,
+ _("Error while writing index for `%s': "),
+ objfile->name);
+ }
+ }
}
+\f
+
int dwarf2_always_disassemble;
static void
show_dwarf2_always_disassemble (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
- fprintf_filtered (file, _("\
-Whether to always disassemble DWARF expressions is %s.\n"),
+ fprintf_filtered (file,
+ _("Whether to always disassemble "
+ "DWARF expressions is %s.\n"),
value);
}
void
_initialize_dwarf2_read (void)
{
+ struct cmd_list_element *c;
+
dwarf2_objfile_data_key
= register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free);
NULL,
NULL,
&setdebuglist, &showdebuglist);
+
+ c = add_cmd ("gdb-index", class_files, save_gdb_index_command,
+ _("\
+Save a gdb-index file.\n\
+Usage: save gdb-index DIRECTORY"),
+ &save_cmdlist);
+ set_cmd_completer (c, filename_completer);
}
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