1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
8 Inc. with support from Florida State University (under contract
9 with the Ada Joint Program Office), and Silicon Graphics, Inc.
10 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
11 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
14 This file is part of GDB.
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 3 of the License, or
19 (at your option) any later version.
21 This program is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public License
27 along with this program. If not, see <http://www.gnu.org/licenses/>. */
37 #include "expression.h"
38 #include "filenames.h" /* for DOSish file names */
41 #include "complaints.h"
43 #include "dwarf2expr.h"
44 #include "dwarf2loc.h"
45 #include "cp-support.h"
51 #include "typeprint.h"
54 #include "exceptions.h"
58 #include "gdb_string.h"
59 #include "gdb_assert.h"
60 #include <sys/types.h>
67 #define MAP_FAILED ((void *) -1)
72 /* .debug_info header for a compilation unit
73 Because of alignment constraints, this structure has padding and cannot
74 be mapped directly onto the beginning of the .debug_info section. */
75 typedef struct comp_unit_header
77 unsigned int length; /* length of the .debug_info
79 unsigned short version; /* version number -- 2 for DWARF
81 unsigned int abbrev_offset; /* offset into .debug_abbrev section */
82 unsigned char addr_size; /* byte size of an address -- 4 */
85 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
88 /* .debug_line statement program prologue
89 Because of alignment constraints, this structure has padding and cannot
90 be mapped directly onto the beginning of the .debug_info section. */
91 typedef struct statement_prologue
93 unsigned int total_length; /* byte length of the statement
95 unsigned short version; /* version number -- 2 for DWARF
97 unsigned int prologue_length; /* # bytes between prologue &
99 unsigned char minimum_instruction_length; /* byte size of
101 unsigned char default_is_stmt; /* initial value of is_stmt
104 unsigned char line_range;
105 unsigned char opcode_base; /* number assigned to first special
107 unsigned char *standard_opcode_lengths;
111 /* When non-zero, dump DIEs after they are read in. */
112 static int dwarf2_die_debug = 0;
116 /* When set, the file that we're processing is known to have debugging
117 info for C++ namespaces. GCC 3.3.x did not produce this information,
118 but later versions do. */
120 static int processing_has_namespace_info;
122 static const struct objfile_data *dwarf2_objfile_data_key;
124 struct dwarf2_section_info
130 /* True if we have tried to read this section. */
134 /* All offsets in the index are of this type. It must be
135 architecture-independent. */
136 typedef uint32_t offset_type;
138 DEF_VEC_I (offset_type);
140 /* A description of the mapped index. The file format is described in
141 a comment by the code that writes the index. */
144 /* The total length of the buffer. */
146 /* A pointer to the address table data. */
147 const gdb_byte *address_table;
148 /* Size of the address table data in bytes. */
149 offset_type address_table_size;
150 /* The hash table. */
151 const offset_type *index_table;
152 /* Size in slots, each slot is 2 offset_types. */
153 offset_type index_table_slots;
154 /* A pointer to the constant pool. */
155 const char *constant_pool;
158 typedef struct dwarf2_per_cu_data *dwarf2_per_cu_data_ptr;
159 DEF_VEC_P (dwarf2_per_cu_data_ptr);
161 struct dwarf2_per_objfile
163 struct dwarf2_section_info info;
164 struct dwarf2_section_info abbrev;
165 struct dwarf2_section_info line;
166 struct dwarf2_section_info loc;
167 struct dwarf2_section_info macinfo;
168 struct dwarf2_section_info str;
169 struct dwarf2_section_info ranges;
170 struct dwarf2_section_info types;
171 struct dwarf2_section_info frame;
172 struct dwarf2_section_info eh_frame;
173 struct dwarf2_section_info gdb_index;
176 struct objfile *objfile;
178 /* A list of all the compilation units. This is used to locate
179 the target compilation unit of a particular reference. */
180 struct dwarf2_per_cu_data **all_comp_units;
182 /* The number of compilation units in ALL_COMP_UNITS. */
185 /* A chain of compilation units that are currently read in, so that
186 they can be freed later. */
187 struct dwarf2_per_cu_data *read_in_chain;
189 /* A table mapping .debug_types signatures to its signatured_type entry.
190 This is NULL if the .debug_types section hasn't been read in yet. */
191 htab_t signatured_types;
193 /* A flag indicating wether this objfile has a section loaded at a
195 int has_section_at_zero;
197 /* True if we are using the mapped index. */
198 unsigned char using_index;
200 /* The mapped index. */
201 struct mapped_index *index_table;
204 static struct dwarf2_per_objfile *dwarf2_per_objfile;
206 /* names of the debugging sections */
208 /* Note that if the debugging section has been compressed, it might
209 have a name like .zdebug_info. */
211 #define INFO_SECTION "debug_info"
212 #define ABBREV_SECTION "debug_abbrev"
213 #define LINE_SECTION "debug_line"
214 #define LOC_SECTION "debug_loc"
215 #define MACINFO_SECTION "debug_macinfo"
216 #define STR_SECTION "debug_str"
217 #define RANGES_SECTION "debug_ranges"
218 #define TYPES_SECTION "debug_types"
219 #define FRAME_SECTION "debug_frame"
220 #define EH_FRAME_SECTION "eh_frame"
221 #define GDB_INDEX_SECTION "gdb_index"
223 /* local data types */
225 /* We hold several abbreviation tables in memory at the same time. */
226 #ifndef ABBREV_HASH_SIZE
227 #define ABBREV_HASH_SIZE 121
230 /* The data in a compilation unit header, after target2host
231 translation, looks like this. */
232 struct comp_unit_head
236 unsigned char addr_size;
237 unsigned char signed_addr_p;
238 unsigned int abbrev_offset;
240 /* Size of file offsets; either 4 or 8. */
241 unsigned int offset_size;
243 /* Size of the length field; either 4 or 12. */
244 unsigned int initial_length_size;
246 /* Offset to the first byte of this compilation unit header in the
247 .debug_info section, for resolving relative reference dies. */
250 /* Offset to first die in this cu from the start of the cu.
251 This will be the first byte following the compilation unit header. */
252 unsigned int first_die_offset;
255 /* Internal state when decoding a particular compilation unit. */
258 /* The objfile containing this compilation unit. */
259 struct objfile *objfile;
261 /* The header of the compilation unit. */
262 struct comp_unit_head header;
264 /* Base address of this compilation unit. */
265 CORE_ADDR base_address;
267 /* Non-zero if base_address has been set. */
270 struct function_range *first_fn, *last_fn, *cached_fn;
272 /* The language we are debugging. */
273 enum language language;
274 const struct language_defn *language_defn;
276 const char *producer;
278 /* The generic symbol table building routines have separate lists for
279 file scope symbols and all all other scopes (local scopes). So
280 we need to select the right one to pass to add_symbol_to_list().
281 We do it by keeping a pointer to the correct list in list_in_scope.
283 FIXME: The original dwarf code just treated the file scope as the
284 first local scope, and all other local scopes as nested local
285 scopes, and worked fine. Check to see if we really need to
286 distinguish these in buildsym.c. */
287 struct pending **list_in_scope;
289 /* DWARF abbreviation table associated with this compilation unit. */
290 struct abbrev_info **dwarf2_abbrevs;
292 /* Storage for the abbrev table. */
293 struct obstack abbrev_obstack;
295 /* Hash table holding all the loaded partial DIEs. */
298 /* Storage for things with the same lifetime as this read-in compilation
299 unit, including partial DIEs. */
300 struct obstack comp_unit_obstack;
302 /* When multiple dwarf2_cu structures are living in memory, this field
303 chains them all together, so that they can be released efficiently.
304 We will probably also want a generation counter so that most-recently-used
305 compilation units are cached... */
306 struct dwarf2_per_cu_data *read_in_chain;
308 /* Backchain to our per_cu entry if the tree has been built. */
309 struct dwarf2_per_cu_data *per_cu;
311 /* Pointer to the die -> type map. Although it is stored
312 permanently in per_cu, we copy it here to avoid double
316 /* How many compilation units ago was this CU last referenced? */
319 /* A hash table of die offsets for following references. */
322 /* Full DIEs if read in. */
323 struct die_info *dies;
325 /* A set of pointers to dwarf2_per_cu_data objects for compilation
326 units referenced by this one. Only set during full symbol processing;
327 partial symbol tables do not have dependencies. */
330 /* Header data from the line table, during full symbol processing. */
331 struct line_header *line_header;
333 /* Mark used when releasing cached dies. */
334 unsigned int mark : 1;
336 /* This flag will be set if this compilation unit might include
337 inter-compilation-unit references. */
338 unsigned int has_form_ref_addr : 1;
340 /* This flag will be set if this compilation unit includes any
341 DW_TAG_namespace DIEs. If we know that there are explicit
342 DIEs for namespaces, we don't need to try to infer them
343 from mangled names. */
344 unsigned int has_namespace_info : 1;
347 /* When using the index (and thus not using psymtabs), each CU has an
348 object of this type. This is used to hold information needed by
349 the various "quick" methods. */
350 struct dwarf2_per_cu_quick_data
352 /* The line table. This can be NULL if there was no line table. */
353 struct line_header *lines;
355 /* The file names from the line table. */
356 const char **file_names;
357 /* The file names from the line table after being run through
359 const char **full_names;
361 /* The corresponding symbol table. This is NULL if symbols for this
362 CU have not yet been read. */
363 struct symtab *symtab;
365 /* A temporary mark bit used when iterating over all CUs in
366 expand_symtabs_matching. */
367 unsigned int mark : 1;
369 /* True if we've tried to read the line table. */
370 unsigned int read_lines : 1;
373 /* Persistent data held for a compilation unit, even when not
374 processing it. We put a pointer to this structure in the
375 read_symtab_private field of the psymtab. If we encounter
376 inter-compilation-unit references, we also maintain a sorted
377 list of all compilation units. */
379 struct dwarf2_per_cu_data
381 /* The start offset and length of this compilation unit. 2**29-1
382 bytes should suffice to store the length of any compilation unit
383 - if it doesn't, GDB will fall over anyway.
384 NOTE: Unlike comp_unit_head.length, this length includes
385 initial_length_size. */
387 unsigned int length : 29;
389 /* Flag indicating this compilation unit will be read in before
390 any of the current compilation units are processed. */
391 unsigned int queued : 1;
393 /* This flag will be set if we need to load absolutely all DIEs
394 for this compilation unit, instead of just the ones we think
395 are interesting. It gets set if we look for a DIE in the
396 hash table and don't find it. */
397 unsigned int load_all_dies : 1;
399 /* Non-zero if this CU is from .debug_types.
400 Otherwise it's from .debug_info. */
401 unsigned int from_debug_types : 1;
403 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
404 of the CU cache it gets reset to NULL again. */
405 struct dwarf2_cu *cu;
407 /* If full symbols for this CU have been read in, then this field
408 holds a map of DIE offsets to types. It isn't always possible
409 to reconstruct this information later, so we have to preserve
413 /* The corresponding objfile. */
414 struct objfile *objfile;
416 /* When using partial symbol tables, the 'psymtab' field is active.
417 Otherwise the 'quick' field is active. */
420 /* The partial symbol table associated with this compilation unit,
421 or NULL for partial units (which do not have an associated
423 struct partial_symtab *psymtab;
425 /* Data needed by the "quick" functions. */
426 struct dwarf2_per_cu_quick_data *quick;
430 /* Entry in the signatured_types hash table. */
432 struct signatured_type
436 /* Offset in .debug_types of the TU (type_unit) for this type. */
439 /* Offset in .debug_types of the type defined by this TU. */
440 unsigned int type_offset;
442 /* The CU(/TU) of this type. */
443 struct dwarf2_per_cu_data per_cu;
446 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
447 which are used for both .debug_info and .debug_types dies.
448 All parameters here are unchanging for the life of the call.
449 This struct exists to abstract away the constant parameters of
452 struct die_reader_specs
454 /* The bfd of this objfile. */
457 /* The CU of the DIE we are parsing. */
458 struct dwarf2_cu *cu;
460 /* Pointer to start of section buffer.
461 This is either the start of .debug_info or .debug_types. */
462 const gdb_byte *buffer;
465 /* The line number information for a compilation unit (found in the
466 .debug_line section) begins with a "statement program header",
467 which contains the following information. */
470 unsigned int total_length;
471 unsigned short version;
472 unsigned int header_length;
473 unsigned char minimum_instruction_length;
474 unsigned char maximum_ops_per_instruction;
475 unsigned char default_is_stmt;
477 unsigned char line_range;
478 unsigned char opcode_base;
480 /* standard_opcode_lengths[i] is the number of operands for the
481 standard opcode whose value is i. This means that
482 standard_opcode_lengths[0] is unused, and the last meaningful
483 element is standard_opcode_lengths[opcode_base - 1]. */
484 unsigned char *standard_opcode_lengths;
486 /* The include_directories table. NOTE! These strings are not
487 allocated with xmalloc; instead, they are pointers into
488 debug_line_buffer. If you try to free them, `free' will get
490 unsigned int num_include_dirs, include_dirs_size;
493 /* The file_names table. NOTE! These strings are not allocated
494 with xmalloc; instead, they are pointers into debug_line_buffer.
495 Don't try to free them directly. */
496 unsigned int num_file_names, file_names_size;
500 unsigned int dir_index;
501 unsigned int mod_time;
503 int included_p; /* Non-zero if referenced by the Line Number Program. */
504 struct symtab *symtab; /* The associated symbol table, if any. */
507 /* The start and end of the statement program following this
508 header. These point into dwarf2_per_objfile->line_buffer. */
509 gdb_byte *statement_program_start, *statement_program_end;
512 /* When we construct a partial symbol table entry we only
513 need this much information. */
514 struct partial_die_info
516 /* Offset of this DIE. */
519 /* DWARF-2 tag for this DIE. */
520 ENUM_BITFIELD(dwarf_tag) tag : 16;
522 /* Assorted flags describing the data found in this DIE. */
523 unsigned int has_children : 1;
524 unsigned int is_external : 1;
525 unsigned int is_declaration : 1;
526 unsigned int has_type : 1;
527 unsigned int has_specification : 1;
528 unsigned int has_pc_info : 1;
530 /* Flag set if the SCOPE field of this structure has been
532 unsigned int scope_set : 1;
534 /* Flag set if the DIE has a byte_size attribute. */
535 unsigned int has_byte_size : 1;
537 /* The name of this DIE. Normally the value of DW_AT_name, but
538 sometimes a default name for unnamed DIEs. */
541 /* The scope to prepend to our children. This is generally
542 allocated on the comp_unit_obstack, so will disappear
543 when this compilation unit leaves the cache. */
546 /* The location description associated with this DIE, if any. */
547 struct dwarf_block *locdesc;
549 /* If HAS_PC_INFO, the PC range associated with this DIE. */
553 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
554 DW_AT_sibling, if any. */
557 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
558 DW_AT_specification (or DW_AT_abstract_origin or
560 unsigned int spec_offset;
562 /* Pointers to this DIE's parent, first child, and next sibling,
564 struct partial_die_info *die_parent, *die_child, *die_sibling;
567 /* This data structure holds the information of an abbrev. */
570 unsigned int number; /* number identifying abbrev */
571 enum dwarf_tag tag; /* dwarf tag */
572 unsigned short has_children; /* boolean */
573 unsigned short num_attrs; /* number of attributes */
574 struct attr_abbrev *attrs; /* an array of attribute descriptions */
575 struct abbrev_info *next; /* next in chain */
580 ENUM_BITFIELD(dwarf_attribute) name : 16;
581 ENUM_BITFIELD(dwarf_form) form : 16;
584 /* Attributes have a name and a value */
587 ENUM_BITFIELD(dwarf_attribute) name : 16;
588 ENUM_BITFIELD(dwarf_form) form : 15;
590 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
591 field should be in u.str (existing only for DW_STRING) but it is kept
592 here for better struct attribute alignment. */
593 unsigned int string_is_canonical : 1;
598 struct dwarf_block *blk;
602 struct signatured_type *signatured_type;
607 /* This data structure holds a complete die structure. */
610 /* DWARF-2 tag for this DIE. */
611 ENUM_BITFIELD(dwarf_tag) tag : 16;
613 /* Number of attributes */
614 unsigned short num_attrs;
619 /* Offset in .debug_info or .debug_types section. */
622 /* The dies in a compilation unit form an n-ary tree. PARENT
623 points to this die's parent; CHILD points to the first child of
624 this node; and all the children of a given node are chained
625 together via their SIBLING fields, terminated by a die whose
627 struct die_info *child; /* Its first child, if any. */
628 struct die_info *sibling; /* Its next sibling, if any. */
629 struct die_info *parent; /* Its parent, if any. */
631 /* An array of attributes, with NUM_ATTRS elements. There may be
632 zero, but it's not common and zero-sized arrays are not
633 sufficiently portable C. */
634 struct attribute attrs[1];
637 struct function_range
640 CORE_ADDR lowpc, highpc;
642 struct function_range *next;
645 /* Get at parts of an attribute structure */
647 #define DW_STRING(attr) ((attr)->u.str)
648 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
649 #define DW_UNSND(attr) ((attr)->u.unsnd)
650 #define DW_BLOCK(attr) ((attr)->u.blk)
651 #define DW_SND(attr) ((attr)->u.snd)
652 #define DW_ADDR(attr) ((attr)->u.addr)
653 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
655 /* Blocks are a bunch of untyped bytes. */
662 #ifndef ATTR_ALLOC_CHUNK
663 #define ATTR_ALLOC_CHUNK 4
666 /* Allocate fields for structs, unions and enums in this size. */
667 #ifndef DW_FIELD_ALLOC_CHUNK
668 #define DW_FIELD_ALLOC_CHUNK 4
671 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
672 but this would require a corresponding change in unpack_field_as_long
674 static int bits_per_byte = 8;
676 /* The routines that read and process dies for a C struct or C++ class
677 pass lists of data member fields and lists of member function fields
678 in an instance of a field_info structure, as defined below. */
681 /* List of data member and baseclasses fields. */
684 struct nextfield *next;
689 *fields, *baseclasses;
691 /* Number of fields (including baseclasses). */
694 /* Number of baseclasses. */
697 /* Set if the accesibility of one of the fields is not public. */
698 int non_public_fields;
700 /* Member function fields array, entries are allocated in the order they
701 are encountered in the object file. */
704 struct nextfnfield *next;
705 struct fn_field fnfield;
709 /* Member function fieldlist array, contains name of possibly overloaded
710 member function, number of overloaded member functions and a pointer
711 to the head of the member function field chain. */
716 struct nextfnfield *head;
720 /* Number of entries in the fnfieldlists array. */
723 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
724 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
725 struct typedef_field_list
727 struct typedef_field field;
728 struct typedef_field_list *next;
731 unsigned typedef_field_list_count;
734 /* One item on the queue of compilation units to read in full symbols
736 struct dwarf2_queue_item
738 struct dwarf2_per_cu_data *per_cu;
739 struct dwarf2_queue_item *next;
742 /* The current queue. */
743 static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail;
745 /* Loaded secondary compilation units are kept in memory until they
746 have not been referenced for the processing of this many
747 compilation units. Set this to zero to disable caching. Cache
748 sizes of up to at least twenty will improve startup time for
749 typical inter-CU-reference binaries, at an obvious memory cost. */
750 static int dwarf2_max_cache_age = 5;
752 show_dwarf2_max_cache_age (struct ui_file *file, int from_tty,
753 struct cmd_list_element *c, const char *value)
755 fprintf_filtered (file, _("\
756 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
761 /* Various complaints about symbol reading that don't abort the process */
764 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
766 complaint (&symfile_complaints,
767 _("statement list doesn't fit in .debug_line section"));
771 dwarf2_debug_line_missing_file_complaint (void)
773 complaint (&symfile_complaints,
774 _(".debug_line section has line data without a file"));
778 dwarf2_debug_line_missing_end_sequence_complaint (void)
780 complaint (&symfile_complaints,
781 _(".debug_line section has line program sequence without an end"));
785 dwarf2_complex_location_expr_complaint (void)
787 complaint (&symfile_complaints, _("location expression too complex"));
791 dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
794 complaint (&symfile_complaints,
795 _("const value length mismatch for '%s', got %d, expected %d"), arg1,
800 dwarf2_macros_too_long_complaint (void)
802 complaint (&symfile_complaints,
803 _("macro info runs off end of `.debug_macinfo' section"));
807 dwarf2_macro_malformed_definition_complaint (const char *arg1)
809 complaint (&symfile_complaints,
810 _("macro debug info contains a malformed macro definition:\n`%s'"),
815 dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
817 complaint (&symfile_complaints,
818 _("invalid attribute class or form for '%s' in '%s'"), arg1, arg2);
821 /* local function prototypes */
823 static void dwarf2_locate_sections (bfd *, asection *, void *);
825 static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
828 static void dwarf2_build_include_psymtabs (struct dwarf2_cu *,
830 struct partial_symtab *);
832 static void dwarf2_build_psymtabs_hard (struct objfile *);
834 static void scan_partial_symbols (struct partial_die_info *,
835 CORE_ADDR *, CORE_ADDR *,
836 int, struct dwarf2_cu *);
838 static void add_partial_symbol (struct partial_die_info *,
841 static void add_partial_namespace (struct partial_die_info *pdi,
842 CORE_ADDR *lowpc, CORE_ADDR *highpc,
843 int need_pc, struct dwarf2_cu *cu);
845 static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
846 CORE_ADDR *highpc, int need_pc,
847 struct dwarf2_cu *cu);
849 static void add_partial_enumeration (struct partial_die_info *enum_pdi,
850 struct dwarf2_cu *cu);
852 static void add_partial_subprogram (struct partial_die_info *pdi,
853 CORE_ADDR *lowpc, CORE_ADDR *highpc,
854 int need_pc, struct dwarf2_cu *cu);
856 static gdb_byte *locate_pdi_sibling (struct partial_die_info *orig_pdi,
857 gdb_byte *buffer, gdb_byte *info_ptr,
858 bfd *abfd, struct dwarf2_cu *cu);
860 static void dwarf2_psymtab_to_symtab (struct partial_symtab *);
862 static void psymtab_to_symtab_1 (struct partial_symtab *);
864 static void dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu);
866 static void dwarf2_free_abbrev_table (void *);
868 static struct abbrev_info *peek_die_abbrev (gdb_byte *, unsigned int *,
871 static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int,
874 static struct partial_die_info *load_partial_dies (bfd *,
875 gdb_byte *, gdb_byte *,
876 int, struct dwarf2_cu *);
878 static gdb_byte *read_partial_die (struct partial_die_info *,
879 struct abbrev_info *abbrev,
881 gdb_byte *, gdb_byte *,
884 static struct partial_die_info *find_partial_die (unsigned int,
887 static void fixup_partial_die (struct partial_die_info *,
890 static gdb_byte *read_attribute (struct attribute *, struct attr_abbrev *,
891 bfd *, gdb_byte *, struct dwarf2_cu *);
893 static gdb_byte *read_attribute_value (struct attribute *, unsigned,
894 bfd *, gdb_byte *, struct dwarf2_cu *);
896 static unsigned int read_1_byte (bfd *, gdb_byte *);
898 static int read_1_signed_byte (bfd *, gdb_byte *);
900 static unsigned int read_2_bytes (bfd *, gdb_byte *);
902 static unsigned int read_4_bytes (bfd *, gdb_byte *);
904 static ULONGEST read_8_bytes (bfd *, gdb_byte *);
906 static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *,
909 static LONGEST read_initial_length (bfd *, gdb_byte *, unsigned int *);
911 static LONGEST read_checked_initial_length_and_offset
912 (bfd *, gdb_byte *, const struct comp_unit_head *,
913 unsigned int *, unsigned int *);
915 static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *,
918 static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int);
920 static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int);
922 static char *read_string (bfd *, gdb_byte *, unsigned int *);
924 static char *read_indirect_string (bfd *, gdb_byte *,
925 const struct comp_unit_head *,
928 static unsigned long read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *);
930 static long read_signed_leb128 (bfd *, gdb_byte *, unsigned int *);
932 static gdb_byte *skip_leb128 (bfd *, gdb_byte *);
934 static void set_cu_language (unsigned int, struct dwarf2_cu *);
936 static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
939 static struct attribute *dwarf2_attr_no_follow (struct die_info *,
943 static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
944 struct dwarf2_cu *cu);
946 static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
948 static struct die_info *die_specification (struct die_info *die,
949 struct dwarf2_cu **);
951 static void free_line_header (struct line_header *lh);
953 static void add_file_name (struct line_header *, char *, unsigned int,
954 unsigned int, unsigned int);
956 static struct line_header *(dwarf_decode_line_header
957 (unsigned int offset,
958 bfd *abfd, struct dwarf2_cu *cu));
960 static void dwarf_decode_lines (struct line_header *, char *, bfd *,
961 struct dwarf2_cu *, struct partial_symtab *);
963 static void dwarf2_start_subfile (char *, char *, char *);
965 static struct symbol *new_symbol (struct die_info *, struct type *,
968 static void dwarf2_const_value (struct attribute *, struct symbol *,
971 static void dwarf2_const_value_data (struct attribute *attr,
975 static struct type *die_type (struct die_info *, struct dwarf2_cu *);
977 static int need_gnat_info (struct dwarf2_cu *);
979 static struct type *die_descriptive_type (struct die_info *, struct dwarf2_cu *);
981 static void set_descriptive_type (struct type *, struct die_info *,
984 static struct type *die_containing_type (struct die_info *,
987 static struct type *tag_type_to_type (struct die_info *, struct dwarf2_cu *);
989 static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
991 static char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
993 static char *typename_concat (struct obstack *obs, const char *prefix,
994 const char *suffix, int physname,
995 struct dwarf2_cu *cu);
997 static void read_file_scope (struct die_info *, struct dwarf2_cu *);
999 static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *);
1001 static void read_func_scope (struct die_info *, struct dwarf2_cu *);
1003 static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
1005 static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *,
1006 struct dwarf2_cu *, struct partial_symtab *);
1008 static int dwarf2_get_pc_bounds (struct die_info *,
1009 CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *,
1010 struct partial_symtab *);
1012 static void get_scope_pc_bounds (struct die_info *,
1013 CORE_ADDR *, CORE_ADDR *,
1014 struct dwarf2_cu *);
1016 static void dwarf2_record_block_ranges (struct die_info *, struct block *,
1017 CORE_ADDR, struct dwarf2_cu *);
1019 static void dwarf2_add_field (struct field_info *, struct die_info *,
1020 struct dwarf2_cu *);
1022 static void dwarf2_attach_fields_to_type (struct field_info *,
1023 struct type *, struct dwarf2_cu *);
1025 static void dwarf2_add_member_fn (struct field_info *,
1026 struct die_info *, struct type *,
1027 struct dwarf2_cu *);
1029 static void dwarf2_attach_fn_fields_to_type (struct field_info *,
1030 struct type *, struct dwarf2_cu *);
1032 static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
1034 static void read_common_block (struct die_info *, struct dwarf2_cu *);
1036 static void read_namespace (struct die_info *die, struct dwarf2_cu *);
1038 static void read_module (struct die_info *die, struct dwarf2_cu *cu);
1040 static void read_import_statement (struct die_info *die, struct dwarf2_cu *);
1042 static struct type *read_module_type (struct die_info *die,
1043 struct dwarf2_cu *cu);
1045 static const char *namespace_name (struct die_info *die,
1046 int *is_anonymous, struct dwarf2_cu *);
1048 static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
1050 static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
1052 static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
1053 struct dwarf2_cu *);
1055 static struct die_info *read_comp_unit (gdb_byte *, struct dwarf2_cu *);
1057 static struct die_info *read_die_and_children_1 (const struct die_reader_specs *reader,
1059 gdb_byte **new_info_ptr,
1060 struct die_info *parent);
1062 static struct die_info *read_die_and_children (const struct die_reader_specs *reader,
1064 gdb_byte **new_info_ptr,
1065 struct die_info *parent);
1067 static struct die_info *read_die_and_siblings (const struct die_reader_specs *reader,
1069 gdb_byte **new_info_ptr,
1070 struct die_info *parent);
1072 static gdb_byte *read_full_die (const struct die_reader_specs *reader,
1073 struct die_info **, gdb_byte *,
1076 static void process_die (struct die_info *, struct dwarf2_cu *);
1078 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu *,
1081 static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
1083 static struct die_info *dwarf2_extension (struct die_info *die,
1084 struct dwarf2_cu **);
1086 static char *dwarf_tag_name (unsigned int);
1088 static char *dwarf_attr_name (unsigned int);
1090 static char *dwarf_form_name (unsigned int);
1092 static char *dwarf_bool_name (unsigned int);
1094 static char *dwarf_type_encoding_name (unsigned int);
1097 static char *dwarf_cfi_name (unsigned int);
1100 static struct die_info *sibling_die (struct die_info *);
1102 static void dump_die_shallow (struct ui_file *, int indent, struct die_info *);
1104 static void dump_die_for_error (struct die_info *);
1106 static void dump_die_1 (struct ui_file *, int level, int max_level,
1109 /*static*/ void dump_die (struct die_info *, int max_level);
1111 static void store_in_ref_table (struct die_info *,
1112 struct dwarf2_cu *);
1114 static int is_ref_attr (struct attribute *);
1116 static unsigned int dwarf2_get_ref_die_offset (struct attribute *);
1118 static LONGEST dwarf2_get_attr_constant_value (struct attribute *, int);
1120 static struct die_info *follow_die_ref_or_sig (struct die_info *,
1122 struct dwarf2_cu **);
1124 static struct die_info *follow_die_ref (struct die_info *,
1126 struct dwarf2_cu **);
1128 static struct die_info *follow_die_sig (struct die_info *,
1130 struct dwarf2_cu **);
1132 static void read_signatured_type_at_offset (struct objfile *objfile,
1133 unsigned int offset);
1135 static void read_signatured_type (struct objfile *,
1136 struct signatured_type *type_sig);
1138 /* memory allocation interface */
1140 static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
1142 static struct abbrev_info *dwarf_alloc_abbrev (struct dwarf2_cu *);
1144 static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int);
1146 static void initialize_cu_func_list (struct dwarf2_cu *);
1148 static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR,
1149 struct dwarf2_cu *);
1151 static void dwarf_decode_macros (struct line_header *, unsigned int,
1152 char *, bfd *, struct dwarf2_cu *);
1154 static int attr_form_is_block (struct attribute *);
1156 static int attr_form_is_section_offset (struct attribute *);
1158 static int attr_form_is_constant (struct attribute *);
1160 static void dwarf2_symbol_mark_computed (struct attribute *attr,
1162 struct dwarf2_cu *cu);
1164 static gdb_byte *skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
1165 struct abbrev_info *abbrev,
1166 struct dwarf2_cu *cu);
1168 static void free_stack_comp_unit (void *);
1170 static hashval_t partial_die_hash (const void *item);
1172 static int partial_die_eq (const void *item_lhs, const void *item_rhs);
1174 static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
1175 (unsigned int offset, struct objfile *objfile);
1177 static struct dwarf2_per_cu_data *dwarf2_find_comp_unit
1178 (unsigned int offset, struct objfile *objfile);
1180 static struct dwarf2_cu *alloc_one_comp_unit (struct objfile *objfile);
1182 static void free_one_comp_unit (void *);
1184 static void free_cached_comp_units (void *);
1186 static void age_cached_comp_units (void);
1188 static void free_one_cached_comp_unit (void *);
1190 static struct type *set_die_type (struct die_info *, struct type *,
1191 struct dwarf2_cu *);
1193 static void create_all_comp_units (struct objfile *);
1195 static void load_full_comp_unit (struct dwarf2_per_cu_data *,
1198 static void process_full_comp_unit (struct dwarf2_per_cu_data *);
1200 static void dwarf2_add_dependence (struct dwarf2_cu *,
1201 struct dwarf2_per_cu_data *);
1203 static void dwarf2_mark (struct dwarf2_cu *);
1205 static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
1207 static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu);
1209 static void dwarf2_release_queue (void *dummy);
1211 static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu,
1212 struct objfile *objfile);
1214 static void process_queue (struct objfile *objfile);
1216 static void find_file_and_directory (struct die_info *die,
1217 struct dwarf2_cu *cu,
1218 char **name, char **comp_dir);
1220 static char *file_full_name (int file, struct line_header *lh,
1221 const char *comp_dir);
1223 static gdb_byte *partial_read_comp_unit_head (struct comp_unit_head *header,
1226 unsigned int buffer_size,
1229 static void init_cu_die_reader (struct die_reader_specs *reader,
1230 struct dwarf2_cu *cu);
1234 /* Convert VALUE between big- and little-endian. */
1236 byte_swap (offset_type value)
1240 result = (value & 0xff) << 24;
1241 result |= (value & 0xff00) << 8;
1242 result |= (value & 0xff0000) >> 8;
1243 result |= (value & 0xff000000) >> 24;
1247 #define MAYBE_SWAP(V) byte_swap (V)
1250 #define MAYBE_SWAP(V) (V)
1251 #endif /* WORDS_BIGENDIAN */
1253 /* The suffix for an index file. */
1254 #define INDEX_SUFFIX ".gdb-index"
1256 /* Try to locate the sections we need for DWARF 2 debugging
1257 information and return true if we have enough to do something. */
1260 dwarf2_has_info (struct objfile *objfile)
1262 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
1263 if (!dwarf2_per_objfile)
1265 /* Initialize per-objfile state. */
1266 struct dwarf2_per_objfile *data
1267 = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
1269 memset (data, 0, sizeof (*data));
1270 set_objfile_data (objfile, dwarf2_objfile_data_key, data);
1271 dwarf2_per_objfile = data;
1273 bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL);
1274 dwarf2_per_objfile->objfile = objfile;
1276 return (dwarf2_per_objfile->info.asection != NULL
1277 && dwarf2_per_objfile->abbrev.asection != NULL);
1280 /* When loading sections, we can either look for ".<name>", or for
1281 * ".z<name>", which indicates a compressed section. */
1284 section_is_p (const char *section_name, const char *name)
1286 return (section_name[0] == '.'
1287 && (strcmp (section_name + 1, name) == 0
1288 || (section_name[1] == 'z'
1289 && strcmp (section_name + 2, name) == 0)));
1292 /* This function is mapped across the sections and remembers the
1293 offset and size of each of the debugging sections we are interested
1297 dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr)
1299 if (section_is_p (sectp->name, INFO_SECTION))
1301 dwarf2_per_objfile->info.asection = sectp;
1302 dwarf2_per_objfile->info.size = bfd_get_section_size (sectp);
1304 else if (section_is_p (sectp->name, ABBREV_SECTION))
1306 dwarf2_per_objfile->abbrev.asection = sectp;
1307 dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp);
1309 else if (section_is_p (sectp->name, LINE_SECTION))
1311 dwarf2_per_objfile->line.asection = sectp;
1312 dwarf2_per_objfile->line.size = bfd_get_section_size (sectp);
1314 else if (section_is_p (sectp->name, LOC_SECTION))
1316 dwarf2_per_objfile->loc.asection = sectp;
1317 dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp);
1319 else if (section_is_p (sectp->name, MACINFO_SECTION))
1321 dwarf2_per_objfile->macinfo.asection = sectp;
1322 dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp);
1324 else if (section_is_p (sectp->name, STR_SECTION))
1326 dwarf2_per_objfile->str.asection = sectp;
1327 dwarf2_per_objfile->str.size = bfd_get_section_size (sectp);
1329 else if (section_is_p (sectp->name, FRAME_SECTION))
1331 dwarf2_per_objfile->frame.asection = sectp;
1332 dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp);
1334 else if (section_is_p (sectp->name, EH_FRAME_SECTION))
1336 flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
1338 if (aflag & SEC_HAS_CONTENTS)
1340 dwarf2_per_objfile->eh_frame.asection = sectp;
1341 dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp);
1344 else if (section_is_p (sectp->name, RANGES_SECTION))
1346 dwarf2_per_objfile->ranges.asection = sectp;
1347 dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp);
1349 else if (section_is_p (sectp->name, TYPES_SECTION))
1351 dwarf2_per_objfile->types.asection = sectp;
1352 dwarf2_per_objfile->types.size = bfd_get_section_size (sectp);
1354 else if (section_is_p (sectp->name, GDB_INDEX_SECTION))
1356 dwarf2_per_objfile->gdb_index.asection = sectp;
1357 dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp);
1360 if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
1361 && bfd_section_vma (abfd, sectp) == 0)
1362 dwarf2_per_objfile->has_section_at_zero = 1;
1365 /* Decompress a section that was compressed using zlib. Store the
1366 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1369 zlib_decompress_section (struct objfile *objfile, asection *sectp,
1370 gdb_byte **outbuf, bfd_size_type *outsize)
1372 bfd *abfd = objfile->obfd;
1374 error (_("Support for zlib-compressed DWARF data (from '%s') "
1375 "is disabled in this copy of GDB"),
1376 bfd_get_filename (abfd));
1378 bfd_size_type compressed_size = bfd_get_section_size (sectp);
1379 gdb_byte *compressed_buffer = xmalloc (compressed_size);
1380 struct cleanup *cleanup = make_cleanup (xfree, compressed_buffer);
1381 bfd_size_type uncompressed_size;
1382 gdb_byte *uncompressed_buffer;
1385 int header_size = 12;
1387 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1388 || bfd_bread (compressed_buffer, compressed_size, abfd) != compressed_size)
1389 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1390 bfd_get_filename (abfd));
1392 /* Read the zlib header. In this case, it should be "ZLIB" followed
1393 by the uncompressed section size, 8 bytes in big-endian order. */
1394 if (compressed_size < header_size
1395 || strncmp (compressed_buffer, "ZLIB", 4) != 0)
1396 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1397 bfd_get_filename (abfd));
1398 uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8;
1399 uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8;
1400 uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8;
1401 uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8;
1402 uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8;
1403 uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8;
1404 uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8;
1405 uncompressed_size += compressed_buffer[11];
1407 /* It is possible the section consists of several compressed
1408 buffers concatenated together, so we uncompress in a loop. */
1412 strm.avail_in = compressed_size - header_size;
1413 strm.next_in = (Bytef*) compressed_buffer + header_size;
1414 strm.avail_out = uncompressed_size;
1415 uncompressed_buffer = obstack_alloc (&objfile->objfile_obstack,
1417 rc = inflateInit (&strm);
1418 while (strm.avail_in > 0)
1421 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1422 bfd_get_filename (abfd), rc);
1423 strm.next_out = ((Bytef*) uncompressed_buffer
1424 + (uncompressed_size - strm.avail_out));
1425 rc = inflate (&strm, Z_FINISH);
1426 if (rc != Z_STREAM_END)
1427 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1428 bfd_get_filename (abfd), rc);
1429 rc = inflateReset (&strm);
1431 rc = inflateEnd (&strm);
1433 || strm.avail_out != 0)
1434 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1435 bfd_get_filename (abfd), rc);
1437 do_cleanups (cleanup);
1438 *outbuf = uncompressed_buffer;
1439 *outsize = uncompressed_size;
1443 /* Read the contents of the section SECTP from object file specified by
1444 OBJFILE, store info about the section into INFO.
1445 If the section is compressed, uncompress it before returning. */
1448 dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info)
1450 bfd *abfd = objfile->obfd;
1451 asection *sectp = info->asection;
1452 gdb_byte *buf, *retbuf;
1453 unsigned char header[4];
1457 info->buffer = NULL;
1458 info->was_mmapped = 0;
1461 if (info->asection == NULL || info->size == 0)
1464 /* Check if the file has a 4-byte header indicating compression. */
1465 if (info->size > sizeof (header)
1466 && bfd_seek (abfd, sectp->filepos, SEEK_SET) == 0
1467 && bfd_bread (header, sizeof (header), abfd) == sizeof (header))
1469 /* Upon decompression, update the buffer and its size. */
1470 if (strncmp (header, "ZLIB", sizeof (header)) == 0)
1472 zlib_decompress_section (objfile, sectp, &info->buffer,
1480 pagesize = getpagesize ();
1482 /* Only try to mmap sections which are large enough: we don't want to
1483 waste space due to fragmentation. Also, only try mmap for sections
1484 without relocations. */
1486 if (info->size > 4 * pagesize && (sectp->flags & SEC_RELOC) == 0)
1488 off_t pg_offset = sectp->filepos & ~(pagesize - 1);
1489 size_t map_length = info->size + sectp->filepos - pg_offset;
1490 caddr_t retbuf = bfd_mmap (abfd, 0, map_length, PROT_READ,
1491 MAP_PRIVATE, pg_offset);
1493 if (retbuf != MAP_FAILED)
1495 info->was_mmapped = 1;
1496 info->buffer = retbuf + (sectp->filepos & (pagesize - 1)) ;
1497 #if HAVE_POSIX_MADVISE
1498 posix_madvise (retbuf, map_length, POSIX_MADV_WILLNEED);
1505 /* If we get here, we are a normal, not-compressed section. */
1507 = obstack_alloc (&objfile->objfile_obstack, info->size);
1509 /* When debugging .o files, we may need to apply relocations; see
1510 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1511 We never compress sections in .o files, so we only need to
1512 try this when the section is not compressed. */
1513 retbuf = symfile_relocate_debug_section (objfile, sectp, buf);
1516 info->buffer = retbuf;
1520 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1521 || bfd_bread (buf, info->size, abfd) != info->size)
1522 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1523 bfd_get_filename (abfd));
1526 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1530 dwarf2_get_section_info (struct objfile *objfile, const char *section_name,
1531 asection **sectp, gdb_byte **bufp,
1532 bfd_size_type *sizep)
1534 struct dwarf2_per_objfile *data
1535 = objfile_data (objfile, dwarf2_objfile_data_key);
1536 struct dwarf2_section_info *info;
1538 /* We may see an objfile without any DWARF, in which case we just
1547 if (section_is_p (section_name, EH_FRAME_SECTION))
1548 info = &data->eh_frame;
1549 else if (section_is_p (section_name, FRAME_SECTION))
1550 info = &data->frame;
1554 if (info->asection != NULL && info->size != 0 && info->buffer == NULL)
1555 /* We haven't read this section in yet. Do it now. */
1556 dwarf2_read_section (objfile, info);
1558 *sectp = info->asection;
1559 *bufp = info->buffer;
1560 *sizep = info->size;
1565 /* Read in the symbols for PER_CU. OBJFILE is the objfile from which
1568 dw2_do_instantiate_symtab (struct objfile *objfile,
1569 struct dwarf2_per_cu_data *per_cu)
1571 struct cleanup *back_to;
1573 back_to = make_cleanup (dwarf2_release_queue, NULL);
1575 queue_comp_unit (per_cu, objfile);
1577 if (per_cu->from_debug_types)
1578 read_signatured_type_at_offset (objfile, per_cu->offset);
1580 load_full_comp_unit (per_cu, objfile);
1582 process_queue (objfile);
1584 /* Age the cache, releasing compilation units that have not
1585 been used recently. */
1586 age_cached_comp_units ();
1588 do_cleanups (back_to);
1591 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
1592 the objfile from which this CU came. Returns the resulting symbol
1594 static struct symtab *
1595 dw2_instantiate_symtab (struct objfile *objfile,
1596 struct dwarf2_per_cu_data *per_cu)
1598 if (!per_cu->v.quick->symtab)
1600 struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL);
1601 increment_reading_symtab ();
1602 dw2_do_instantiate_symtab (objfile, per_cu);
1603 do_cleanups (back_to);
1605 return per_cu->v.quick->symtab;
1608 /* A helper function that knows how to read a 64-bit value in a way
1609 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
1612 extract_cu_value (const char *bytes, ULONGEST *result)
1614 if (sizeof (ULONGEST) < 8)
1618 /* Ignore the upper 4 bytes if they are all zero. */
1619 for (i = 0; i < 4; ++i)
1620 if (bytes[i + 4] != 0)
1623 *result = extract_unsigned_integer (bytes, 4, BFD_ENDIAN_LITTLE);
1626 *result = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE);
1630 /* Read the CU list from the mapped index, and use it to create all
1631 the CU objects for this objfile. Return 0 if something went wrong,
1632 1 if everything went ok. */
1634 create_cus_from_index (struct objfile *objfile, struct mapped_index *index,
1635 const gdb_byte *cu_list, offset_type cu_list_elements)
1640 dwarf2_per_objfile->n_comp_units = cu_list_elements / 2;
1641 dwarf2_per_objfile->all_comp_units
1642 = obstack_alloc (&objfile->objfile_obstack,
1643 dwarf2_per_objfile->n_comp_units
1644 * sizeof (struct dwarf2_per_cu_data *));
1646 for (i = 0; i < cu_list_elements; i += 2)
1648 struct dwarf2_per_cu_data *the_cu;
1649 ULONGEST offset, length;
1651 if (!extract_cu_value (cu_list, &offset)
1652 || !extract_cu_value (cu_list + 8, &length))
1656 the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack,
1657 struct dwarf2_per_cu_data);
1658 the_cu->offset = offset;
1659 the_cu->length = length;
1660 the_cu->objfile = objfile;
1661 the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
1662 struct dwarf2_per_cu_quick_data);
1663 dwarf2_per_objfile->all_comp_units[i / 2] = the_cu;
1669 /* Read the address map data from the mapped index, and use it to
1670 populate the objfile's psymtabs_addrmap. */
1672 create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index)
1674 const gdb_byte *iter, *end;
1675 struct obstack temp_obstack;
1676 struct addrmap *mutable_map;
1677 struct cleanup *cleanup;
1680 obstack_init (&temp_obstack);
1681 cleanup = make_cleanup_obstack_free (&temp_obstack);
1682 mutable_map = addrmap_create_mutable (&temp_obstack);
1684 iter = index->address_table;
1685 end = iter + index->address_table_size;
1687 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1691 ULONGEST hi, lo, cu_index;
1692 lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
1694 hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
1696 cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE);
1699 addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1,
1700 dwarf2_per_objfile->all_comp_units[cu_index]);
1703 objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map,
1704 &objfile->objfile_obstack);
1705 do_cleanups (cleanup);
1708 /* The hash function for strings in the mapped index. This is the
1709 same as the hashtab.c hash function, but we keep a separate copy to
1710 maintain control over the implementation. This is necessary
1711 because the hash function is tied to the format of the mapped index
1714 mapped_index_string_hash (const void *p)
1716 const unsigned char *str = (const unsigned char *) p;
1720 while ((c = *str++) != 0)
1721 r = r * 67 + c - 113;
1726 /* Find a slot in the mapped index INDEX for the object named NAME.
1727 If NAME is found, set *VEC_OUT to point to the CU vector in the
1728 constant pool and return 1. If NAME cannot be found, return 0. */
1730 find_slot_in_mapped_hash (struct mapped_index *index, const char *name,
1731 offset_type **vec_out)
1733 offset_type hash = mapped_index_string_hash (name);
1734 offset_type slot, step;
1736 slot = hash & (index->index_table_slots - 1);
1737 step = ((hash * 17) & (index->index_table_slots - 1)) | 1;
1741 /* Convert a slot number to an offset into the table. */
1742 offset_type i = 2 * slot;
1744 if (index->index_table[i] == 0 && index->index_table[i + 1] == 0)
1747 str = index->constant_pool + MAYBE_SWAP (index->index_table[i]);
1748 if (!strcmp (name, str))
1750 *vec_out = (offset_type *) (index->constant_pool
1751 + MAYBE_SWAP (index->index_table[i + 1]));
1755 slot = (slot + step) & (index->index_table_slots - 1);
1759 /* Read the index file. If everything went ok, initialize the "quick"
1760 elements of all the CUs and return 1. Otherwise, return 0. */
1762 dwarf2_read_index (struct objfile *objfile)
1765 struct mapped_index *map;
1766 offset_type *metadata;
1767 const gdb_byte *cu_list;
1768 offset_type cu_list_elements;
1770 if (dwarf2_per_objfile->gdb_index.asection == NULL
1771 || dwarf2_per_objfile->gdb_index.size == 0)
1773 dwarf2_read_section (objfile, &dwarf2_per_objfile->gdb_index);
1775 addr = dwarf2_per_objfile->gdb_index.buffer;
1776 /* Version check. */
1777 if (MAYBE_SWAP (*(offset_type *) addr) != 1)
1780 map = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct mapped_index);
1781 map->total_size = dwarf2_per_objfile->gdb_index.size;
1783 metadata = (offset_type *) (addr + sizeof (offset_type));
1784 cu_list = addr + MAYBE_SWAP (metadata[0]);
1785 cu_list_elements = ((MAYBE_SWAP (metadata[1]) - MAYBE_SWAP (metadata[0]))
1787 map->address_table = addr + MAYBE_SWAP (metadata[1]);
1788 map->address_table_size = (MAYBE_SWAP (metadata[2])
1789 - MAYBE_SWAP (metadata[1]));
1790 map->index_table = (offset_type *) (addr + MAYBE_SWAP (metadata[2]));
1791 map->index_table_slots = ((MAYBE_SWAP (metadata[3])
1792 - MAYBE_SWAP (metadata[2]))
1793 / (2 * sizeof (offset_type)));
1794 map->constant_pool = addr + MAYBE_SWAP (metadata[3]);
1796 if (!create_cus_from_index (objfile, map, cu_list, cu_list_elements))
1799 create_addrmap_from_index (objfile, map);
1801 dwarf2_per_objfile->index_table = map;
1802 dwarf2_per_objfile->using_index = 1;
1807 /* A helper for the "quick" functions which sets the global
1808 dwarf2_per_objfile according to OBJFILE. */
1810 dw2_setup (struct objfile *objfile)
1812 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
1813 gdb_assert (dwarf2_per_objfile);
1816 /* A helper for the "quick" functions which attempts to read the line
1817 table for THIS_CU. */
1819 dw2_require_line_header (struct objfile *objfile,
1820 struct dwarf2_per_cu_data *this_cu)
1822 bfd *abfd = objfile->obfd;
1823 struct line_header *lh = NULL;
1824 struct attribute *attr;
1825 struct cleanup *cleanups;
1826 struct die_info *comp_unit_die;
1827 gdb_byte *beg_of_comp_unit, *info_ptr, *buffer;
1828 int has_children, i;
1829 struct dwarf2_cu cu;
1830 unsigned int bytes_read, buffer_size;
1831 struct die_reader_specs reader_specs;
1832 char *name, *comp_dir;
1834 if (this_cu->v.quick->read_lines)
1836 this_cu->v.quick->read_lines = 1;
1838 memset (&cu, 0, sizeof (cu));
1839 cu.objfile = objfile;
1840 obstack_init (&cu.comp_unit_obstack);
1842 cleanups = make_cleanup (free_stack_comp_unit, &cu);
1844 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
1845 buffer_size = dwarf2_per_objfile->info.size;
1846 buffer = dwarf2_per_objfile->info.buffer;
1847 info_ptr = buffer + this_cu->offset;
1848 beg_of_comp_unit = info_ptr;
1850 info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
1851 buffer, buffer_size,
1854 /* Complete the cu_header. */
1855 cu.header.offset = beg_of_comp_unit - buffer;
1856 cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
1859 cu.per_cu = this_cu;
1861 dwarf2_read_abbrevs (abfd, &cu);
1862 make_cleanup (dwarf2_free_abbrev_table, &cu);
1864 if (this_cu->from_debug_types)
1865 info_ptr += 8 /*signature*/ + cu.header.offset_size;
1866 init_cu_die_reader (&reader_specs, &cu);
1867 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
1870 attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, &cu);
1873 unsigned int line_offset = DW_UNSND (attr);
1874 lh = dwarf_decode_line_header (line_offset, abfd, &cu);
1878 do_cleanups (cleanups);
1882 find_file_and_directory (comp_unit_die, &cu, &name, &comp_dir);
1884 this_cu->v.quick->lines = lh;
1886 this_cu->v.quick->file_names
1887 = obstack_alloc (&objfile->objfile_obstack,
1888 lh->num_file_names * sizeof (char *));
1889 for (i = 0; i < lh->num_file_names; ++i)
1890 this_cu->v.quick->file_names[i] = file_full_name (i + 1, lh, comp_dir);
1892 do_cleanups (cleanups);
1895 /* A helper for the "quick" functions which computes and caches the
1896 real path for a given file name from the line table.
1897 dw2_require_line_header must have been called before this is
1900 dw2_require_full_path (struct objfile *objfile,
1901 struct dwarf2_per_cu_data *cu,
1904 if (!cu->v.quick->full_names)
1905 cu->v.quick->full_names
1906 = OBSTACK_CALLOC (&objfile->objfile_obstack,
1907 cu->v.quick->lines->num_file_names,
1910 if (!cu->v.quick->full_names[index])
1911 cu->v.quick->full_names[index]
1912 = gdb_realpath (cu->v.quick->file_names[index]);
1914 return cu->v.quick->full_names[index];
1917 static struct symtab *
1918 dw2_find_last_source_symtab (struct objfile *objfile)
1921 dw2_setup (objfile);
1922 index = dwarf2_per_objfile->n_comp_units - 1;
1923 return dw2_instantiate_symtab (objfile,
1924 dwarf2_per_objfile->all_comp_units[index]);
1928 dw2_forget_cached_source_info (struct objfile *objfile)
1932 dw2_setup (objfile);
1933 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
1935 struct dwarf2_per_cu_data *cu = dwarf2_per_objfile->all_comp_units[i];
1937 if (cu->v.quick->full_names)
1941 for (j = 0; j < cu->v.quick->lines->num_file_names; ++j)
1942 xfree ((void *) cu->v.quick->full_names[j]);
1948 dw2_lookup_symtab (struct objfile *objfile, const char *name,
1949 const char *full_path, const char *real_path,
1950 struct symtab **result)
1953 int check_basename = lbasename (name) == name;
1954 struct dwarf2_per_cu_data *base_cu = NULL;
1956 dw2_setup (objfile);
1957 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
1960 struct dwarf2_per_cu_data *cu = dwarf2_per_objfile->all_comp_units[i];
1962 if (cu->v.quick->symtab)
1965 dw2_require_line_header (objfile, cu);
1966 if (!cu->v.quick->lines)
1969 for (j = 0; j < cu->v.quick->lines->num_file_names; ++j)
1971 const char *this_name = cu->v.quick->file_names[j];
1973 if (FILENAME_CMP (name, this_name) == 0)
1975 *result = dw2_instantiate_symtab (objfile, cu);
1979 if (check_basename && ! base_cu
1980 && FILENAME_CMP (lbasename (this_name), name) == 0)
1983 if (full_path != NULL)
1985 const char *this_full_name = dw2_require_full_path (objfile,
1989 && FILENAME_CMP (full_path, this_full_name) == 0)
1991 *result = dw2_instantiate_symtab (objfile, cu);
1996 if (real_path != NULL)
1998 const char *this_full_name = dw2_require_full_path (objfile,
2001 if (this_full_name != NULL)
2003 char *rp = gdb_realpath (this_full_name);
2004 if (rp != NULL && FILENAME_CMP (real_path, rp) == 0)
2007 *result = dw2_instantiate_symtab (objfile, cu);
2018 *result = dw2_instantiate_symtab (objfile, base_cu);
2025 static struct symtab *
2026 dw2_lookup_symbol (struct objfile *objfile, int block_index,
2027 const char *name, domain_enum domain)
2029 /* We do all the work in the pre_expand_symtabs_matching hook
2034 /* A helper function that expands all symtabs that hold an object
2037 dw2_do_expand_symtabs_matching (struct objfile *objfile, const char *name)
2039 dw2_setup (objfile);
2041 if (dwarf2_per_objfile->index_table)
2045 if (find_slot_in_mapped_hash (dwarf2_per_objfile->index_table,
2048 offset_type i, len = MAYBE_SWAP (*vec);
2049 for (i = 0; i < len; ++i)
2051 offset_type cu_index = MAYBE_SWAP (vec[i + 1]);
2052 struct dwarf2_per_cu_data *cu;
2053 cu = dwarf2_per_objfile->all_comp_units[cu_index];
2054 dw2_instantiate_symtab (objfile, cu);
2061 dw2_pre_expand_symtabs_matching (struct objfile *objfile,
2062 int kind, const char *name,
2065 dw2_do_expand_symtabs_matching (objfile, name);
2069 dw2_print_stats (struct objfile *objfile)
2073 dw2_setup (objfile);
2075 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
2077 struct dwarf2_per_cu_data *cu = dwarf2_per_objfile->all_comp_units[i];
2079 if (!cu->v.quick->symtab)
2082 printf_filtered (_(" Number of unread CUs: %d\n"), count);
2086 dw2_dump (struct objfile *objfile)
2088 /* Nothing worth printing. */
2092 dw2_relocate (struct objfile *objfile, struct section_offsets *new_offsets,
2093 struct section_offsets *delta)
2095 /* There's nothing to relocate here. */
2099 dw2_expand_symtabs_for_function (struct objfile *objfile,
2100 const char *func_name)
2102 dw2_do_expand_symtabs_matching (objfile, func_name);
2106 dw2_expand_all_symtabs (struct objfile *objfile)
2110 dw2_setup (objfile);
2111 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
2113 struct dwarf2_per_cu_data *cu = dwarf2_per_objfile->all_comp_units[i];
2115 dw2_instantiate_symtab (objfile, cu);
2120 dw2_expand_symtabs_with_filename (struct objfile *objfile,
2121 const char *filename)
2125 dw2_setup (objfile);
2126 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
2129 struct dwarf2_per_cu_data *cu = dwarf2_per_objfile->all_comp_units[i];
2131 if (cu->v.quick->symtab)
2134 dw2_require_line_header (objfile, cu);
2135 if (!cu->v.quick->lines)
2138 for (j = 0; j < cu->v.quick->lines->num_file_names; ++j)
2140 const char *this_name = cu->v.quick->file_names[j];
2141 if (strcmp (this_name, filename) == 0)
2143 dw2_instantiate_symtab (objfile, cu);
2151 dw2_find_symbol_file (struct objfile *objfile, const char *name)
2153 struct dwarf2_per_cu_data *cu;
2156 dw2_setup (objfile);
2158 if (!dwarf2_per_objfile->index_table)
2161 if (!find_slot_in_mapped_hash (dwarf2_per_objfile->index_table,
2165 /* Note that this just looks at the very first one named NAME -- but
2166 actually we are looking for a function. find_main_filename
2167 should be rewritten so that it doesn't require a custom hook. It
2168 could just use the ordinary symbol tables. */
2169 /* vec[0] is the length, which must always be >0. */
2170 cu = dwarf2_per_objfile->all_comp_units[MAYBE_SWAP (vec[1])];
2172 dw2_require_line_header (objfile, cu);
2173 if (!cu->v.quick->lines)
2176 return cu->v.quick->file_names[cu->v.quick->lines->num_file_names - 1];
2180 dw2_map_ada_symtabs (struct objfile *objfile,
2181 int (*wild_match) (const char *, int, const char *),
2182 int (*is_name_suffix) (const char *),
2183 void (*callback) (struct objfile *,
2184 struct symtab *, void *),
2185 const char *name, int global,
2186 domain_enum namespace, int wild,
2189 /* For now, we don't support Ada, so this function can't be
2191 internal_error (__FILE__, __LINE__,
2192 _("map_ada_symtabs called via index method"));
2196 dw2_expand_symtabs_matching (struct objfile *objfile,
2197 int (*file_matcher) (const char *, void *),
2198 int (*name_matcher) (const char *, void *),
2205 dw2_setup (objfile);
2206 if (!dwarf2_per_objfile->index_table)
2209 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
2212 struct dwarf2_per_cu_data *cu = dwarf2_per_objfile->all_comp_units[i];
2214 cu->v.quick->mark = 0;
2215 if (cu->v.quick->symtab)
2218 dw2_require_line_header (objfile, cu);
2219 if (!cu->v.quick->lines)
2222 for (j = 0; j < cu->v.quick->lines->num_file_names; ++j)
2224 if (file_matcher (cu->v.quick->file_names[j], data))
2226 cu->v.quick->mark = 1;
2233 iter < dwarf2_per_objfile->index_table->index_table_slots;
2236 offset_type idx = 2 * iter;
2238 offset_type *vec, vec_len, vec_idx;
2240 if (dwarf2_per_objfile->index_table->index_table[idx] == 0
2241 && dwarf2_per_objfile->index_table->index_table[idx + 1] == 0)
2244 name = (dwarf2_per_objfile->index_table->constant_pool
2245 + dwarf2_per_objfile->index_table->index_table[idx]);
2247 if (! (*name_matcher) (name, data))
2250 /* The name was matched, now expand corresponding CUs that were
2252 vec = (offset_type *) (dwarf2_per_objfile->index_table->constant_pool
2253 + dwarf2_per_objfile->index_table->index_table[idx + 1]);
2254 vec_len = MAYBE_SWAP (vec[0]);
2255 for (vec_idx = 0; vec_idx < vec_len; ++vec_idx)
2257 struct dwarf2_per_cu_data *cu
2258 = dwarf2_per_objfile->all_comp_units[MAYBE_SWAP (vec[vec_idx + 1])];
2259 if (cu->v.quick->mark)
2260 dw2_instantiate_symtab (objfile, cu);
2265 static struct symtab *
2266 dw2_find_pc_sect_symtab (struct objfile *objfile,
2267 struct minimal_symbol *msymbol,
2269 struct obj_section *section,
2272 struct dwarf2_per_cu_data *data;
2274 dw2_setup (objfile);
2276 if (!objfile->psymtabs_addrmap)
2279 data = addrmap_find (objfile->psymtabs_addrmap, pc);
2283 if (warn_if_readin && data->v.quick->symtab)
2284 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)\n"),
2285 paddress (get_objfile_arch (objfile), pc));
2287 return dw2_instantiate_symtab (objfile, data);
2291 dw2_map_symbol_names (struct objfile *objfile,
2292 void (*fun) (const char *, void *),
2296 dw2_setup (objfile);
2298 if (!dwarf2_per_objfile->index_table)
2302 iter < dwarf2_per_objfile->index_table->index_table_slots;
2305 offset_type idx = 2 * iter;
2307 offset_type *vec, vec_len, vec_idx;
2309 if (dwarf2_per_objfile->index_table->index_table[idx] == 0
2310 && dwarf2_per_objfile->index_table->index_table[idx + 1] == 0)
2313 name = (dwarf2_per_objfile->index_table->constant_pool
2314 + dwarf2_per_objfile->index_table->index_table[idx]);
2316 (*fun) (name, data);
2321 dw2_map_symbol_filenames (struct objfile *objfile,
2322 void (*fun) (const char *, const char *, void *),
2327 dw2_setup (objfile);
2328 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
2331 struct dwarf2_per_cu_data *cu = dwarf2_per_objfile->all_comp_units[i];
2333 if (cu->v.quick->symtab)
2336 dw2_require_line_header (objfile, cu);
2337 if (!cu->v.quick->lines)
2340 for (j = 0; j < cu->v.quick->lines->num_file_names; ++j)
2342 const char *this_full_name = dw2_require_full_path (objfile, cu, j);
2343 (*fun) (cu->v.quick->file_names[j], this_full_name, data);
2349 dw2_has_symbols (struct objfile *objfile)
2354 const struct quick_symbol_functions dwarf2_gdb_index_functions =
2357 dw2_find_last_source_symtab,
2358 dw2_forget_cached_source_info,
2361 dw2_pre_expand_symtabs_matching,
2365 dw2_expand_symtabs_for_function,
2366 dw2_expand_all_symtabs,
2367 dw2_expand_symtabs_with_filename,
2368 dw2_find_symbol_file,
2369 dw2_map_ada_symtabs,
2370 dw2_expand_symtabs_matching,
2371 dw2_find_pc_sect_symtab,
2372 dw2_map_symbol_names,
2373 dw2_map_symbol_filenames
2376 /* Initialize for reading DWARF for this objfile. Return 0 if this
2377 file will use psymtabs, or 1 if using the GNU index. */
2380 dwarf2_initialize_objfile (struct objfile *objfile)
2382 /* If we're about to read full symbols, don't bother with the
2383 indices. In this case we also don't care if some other debug
2384 format is making psymtabs, because they are all about to be
2386 if ((objfile->flags & OBJF_READNOW))
2390 dwarf2_per_objfile->using_index = 1;
2391 create_all_comp_units (objfile);
2393 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
2395 struct dwarf2_per_cu_data *cu = dwarf2_per_objfile->all_comp_units[i];
2397 cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2398 struct dwarf2_per_cu_quick_data);
2401 /* Return 1 so that gdb sees the "quick" functions. However,
2402 these functions will be no-ops because we will have expanded
2407 if (dwarf2_read_index (objfile))
2410 dwarf2_build_psymtabs (objfile);
2416 /* Build a partial symbol table. */
2419 dwarf2_build_psymtabs (struct objfile *objfile)
2421 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
2423 init_psymbol_list (objfile, 1024);
2426 dwarf2_build_psymtabs_hard (objfile);
2429 /* Return TRUE if OFFSET is within CU_HEADER. */
2432 offset_in_cu_p (const struct comp_unit_head *cu_header, unsigned int offset)
2434 unsigned int bottom = cu_header->offset;
2435 unsigned int top = (cu_header->offset
2437 + cu_header->initial_length_size);
2439 return (offset >= bottom && offset < top);
2442 /* Read in the comp unit header information from the debug_info at info_ptr.
2443 NOTE: This leaves members offset, first_die_offset to be filled in
2447 read_comp_unit_head (struct comp_unit_head *cu_header,
2448 gdb_byte *info_ptr, bfd *abfd)
2451 unsigned int bytes_read;
2453 cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read);
2454 cu_header->initial_length_size = bytes_read;
2455 cu_header->offset_size = (bytes_read == 4) ? 4 : 8;
2456 info_ptr += bytes_read;
2457 cu_header->version = read_2_bytes (abfd, info_ptr);
2459 cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
2461 info_ptr += bytes_read;
2462 cu_header->addr_size = read_1_byte (abfd, info_ptr);
2464 signed_addr = bfd_get_sign_extend_vma (abfd);
2465 if (signed_addr < 0)
2466 internal_error (__FILE__, __LINE__,
2467 _("read_comp_unit_head: dwarf from non elf file"));
2468 cu_header->signed_addr_p = signed_addr;
2474 partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
2475 gdb_byte *buffer, unsigned int buffer_size,
2478 gdb_byte *beg_of_comp_unit = info_ptr;
2480 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
2482 if (header->version != 2 && header->version != 3 && header->version != 4)
2483 error (_("Dwarf Error: wrong version in compilation unit header "
2484 "(is %d, should be 2, 3, or 4) [in module %s]"), header->version,
2485 bfd_get_filename (abfd));
2487 if (header->abbrev_offset >= dwarf2_per_objfile->abbrev.size)
2488 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
2489 "(offset 0x%lx + 6) [in module %s]"),
2490 (long) header->abbrev_offset,
2491 (long) (beg_of_comp_unit - buffer),
2492 bfd_get_filename (abfd));
2494 if (beg_of_comp_unit + header->length + header->initial_length_size
2495 > buffer + buffer_size)
2496 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
2497 "(offset 0x%lx + 0) [in module %s]"),
2498 (long) header->length,
2499 (long) (beg_of_comp_unit - buffer),
2500 bfd_get_filename (abfd));
2505 /* Read in the types comp unit header information from .debug_types entry at
2506 types_ptr. The result is a pointer to one past the end of the header. */
2509 read_type_comp_unit_head (struct comp_unit_head *cu_header,
2510 ULONGEST *signature,
2511 gdb_byte *types_ptr, bfd *abfd)
2513 gdb_byte *initial_types_ptr = types_ptr;
2515 dwarf2_read_section (dwarf2_per_objfile->objfile,
2516 &dwarf2_per_objfile->types);
2517 cu_header->offset = types_ptr - dwarf2_per_objfile->types.buffer;
2519 types_ptr = read_comp_unit_head (cu_header, types_ptr, abfd);
2521 *signature = read_8_bytes (abfd, types_ptr);
2523 types_ptr += cu_header->offset_size;
2524 cu_header->first_die_offset = types_ptr - initial_types_ptr;
2529 /* Allocate a new partial symtab for file named NAME and mark this new
2530 partial symtab as being an include of PST. */
2533 dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
2534 struct objfile *objfile)
2536 struct partial_symtab *subpst = allocate_psymtab (name, objfile);
2538 subpst->section_offsets = pst->section_offsets;
2539 subpst->textlow = 0;
2540 subpst->texthigh = 0;
2542 subpst->dependencies = (struct partial_symtab **)
2543 obstack_alloc (&objfile->objfile_obstack,
2544 sizeof (struct partial_symtab *));
2545 subpst->dependencies[0] = pst;
2546 subpst->number_of_dependencies = 1;
2548 subpst->globals_offset = 0;
2549 subpst->n_global_syms = 0;
2550 subpst->statics_offset = 0;
2551 subpst->n_static_syms = 0;
2552 subpst->symtab = NULL;
2553 subpst->read_symtab = pst->read_symtab;
2556 /* No private part is necessary for include psymtabs. This property
2557 can be used to differentiate between such include psymtabs and
2558 the regular ones. */
2559 subpst->read_symtab_private = NULL;
2562 /* Read the Line Number Program data and extract the list of files
2563 included by the source file represented by PST. Build an include
2564 partial symtab for each of these included files. */
2567 dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
2568 struct die_info *die,
2569 struct partial_symtab *pst)
2571 struct objfile *objfile = cu->objfile;
2572 bfd *abfd = objfile->obfd;
2573 struct line_header *lh = NULL;
2574 struct attribute *attr;
2576 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
2579 unsigned int line_offset = DW_UNSND (attr);
2581 lh = dwarf_decode_line_header (line_offset, abfd, cu);
2584 return; /* No linetable, so no includes. */
2586 dwarf_decode_lines (lh, NULL, abfd, cu, pst);
2588 free_line_header (lh);
2592 hash_type_signature (const void *item)
2594 const struct signatured_type *type_sig = item;
2596 /* This drops the top 32 bits of the signature, but is ok for a hash. */
2597 return type_sig->signature;
2601 eq_type_signature (const void *item_lhs, const void *item_rhs)
2603 const struct signatured_type *lhs = item_lhs;
2604 const struct signatured_type *rhs = item_rhs;
2606 return lhs->signature == rhs->signature;
2609 /* Create the hash table of all entries in the .debug_types section.
2610 The result is zero if there is an error (e.g. missing .debug_types section),
2611 otherwise non-zero. */
2614 create_debug_types_hash_table (struct objfile *objfile)
2619 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
2620 info_ptr = dwarf2_per_objfile->types.buffer;
2622 if (info_ptr == NULL)
2624 dwarf2_per_objfile->signatured_types = NULL;
2628 types_htab = htab_create_alloc_ex (41,
2629 hash_type_signature,
2632 &objfile->objfile_obstack,
2633 hashtab_obstack_allocate,
2634 dummy_obstack_deallocate);
2636 if (dwarf2_die_debug)
2637 fprintf_unfiltered (gdb_stdlog, "Signatured types:\n");
2639 while (info_ptr < dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
2641 unsigned int offset;
2642 unsigned int offset_size;
2643 unsigned int type_offset;
2644 unsigned int length, initial_length_size;
2645 unsigned short version;
2647 struct signatured_type *type_sig;
2649 gdb_byte *ptr = info_ptr;
2651 offset = ptr - dwarf2_per_objfile->types.buffer;
2653 /* We need to read the type's signature in order to build the hash
2654 table, but we don't need to read anything else just yet. */
2656 /* Sanity check to ensure entire cu is present. */
2657 length = read_initial_length (objfile->obfd, ptr, &initial_length_size);
2658 if (ptr + length + initial_length_size
2659 > dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
2661 complaint (&symfile_complaints,
2662 _("debug type entry runs off end of `.debug_types' section, ignored"));
2666 offset_size = initial_length_size == 4 ? 4 : 8;
2667 ptr += initial_length_size;
2668 version = bfd_get_16 (objfile->obfd, ptr);
2670 ptr += offset_size; /* abbrev offset */
2671 ptr += 1; /* address size */
2672 signature = bfd_get_64 (objfile->obfd, ptr);
2674 type_offset = read_offset_1 (objfile->obfd, ptr, offset_size);
2676 type_sig = obstack_alloc (&objfile->objfile_obstack, sizeof (*type_sig));
2677 memset (type_sig, 0, sizeof (*type_sig));
2678 type_sig->signature = signature;
2679 type_sig->offset = offset;
2680 type_sig->type_offset = type_offset;
2682 slot = htab_find_slot (types_htab, type_sig, INSERT);
2683 gdb_assert (slot != NULL);
2686 if (dwarf2_die_debug)
2687 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n",
2688 offset, phex (signature, sizeof (signature)));
2690 info_ptr = info_ptr + initial_length_size + length;
2693 dwarf2_per_objfile->signatured_types = types_htab;
2698 /* Lookup a signature based type.
2699 Returns NULL if SIG is not present in the table. */
2701 static struct signatured_type *
2702 lookup_signatured_type (struct objfile *objfile, ULONGEST sig)
2704 struct signatured_type find_entry, *entry;
2706 if (dwarf2_per_objfile->signatured_types == NULL)
2708 complaint (&symfile_complaints,
2709 _("missing `.debug_types' section for DW_FORM_sig8 die"));
2713 find_entry.signature = sig;
2714 entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
2718 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
2721 init_cu_die_reader (struct die_reader_specs *reader,
2722 struct dwarf2_cu *cu)
2724 reader->abfd = cu->objfile->obfd;
2726 if (cu->per_cu->from_debug_types)
2728 gdb_assert (dwarf2_per_objfile->types.readin);
2729 reader->buffer = dwarf2_per_objfile->types.buffer;
2733 gdb_assert (dwarf2_per_objfile->info.readin);
2734 reader->buffer = dwarf2_per_objfile->info.buffer;
2738 /* Find the base address of the compilation unit for range lists and
2739 location lists. It will normally be specified by DW_AT_low_pc.
2740 In DWARF-3 draft 4, the base address could be overridden by
2741 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2742 compilation units with discontinuous ranges. */
2745 dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu)
2747 struct attribute *attr;
2750 cu->base_address = 0;
2752 attr = dwarf2_attr (die, DW_AT_entry_pc, cu);
2755 cu->base_address = DW_ADDR (attr);
2760 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
2763 cu->base_address = DW_ADDR (attr);
2769 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
2770 to combine the common parts.
2771 Process a compilation unit for a psymtab.
2772 BUFFER is a pointer to the beginning of the dwarf section buffer,
2773 either .debug_info or debug_types.
2774 INFO_PTR is a pointer to the start of the CU.
2775 Returns a pointer to the next CU. */
2778 process_psymtab_comp_unit (struct objfile *objfile,
2779 struct dwarf2_per_cu_data *this_cu,
2780 gdb_byte *buffer, gdb_byte *info_ptr,
2781 unsigned int buffer_size)
2783 bfd *abfd = objfile->obfd;
2784 gdb_byte *beg_of_comp_unit = info_ptr;
2785 struct die_info *comp_unit_die;
2786 struct partial_symtab *pst;
2788 struct cleanup *back_to_inner;
2789 struct dwarf2_cu cu;
2790 int has_children, has_pc_info;
2791 struct attribute *attr;
2792 CORE_ADDR best_lowpc = 0, best_highpc = 0;
2793 struct die_reader_specs reader_specs;
2795 memset (&cu, 0, sizeof (cu));
2796 cu.objfile = objfile;
2797 obstack_init (&cu.comp_unit_obstack);
2799 back_to_inner = make_cleanup (free_stack_comp_unit, &cu);
2801 info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
2802 buffer, buffer_size,
2805 /* Complete the cu_header. */
2806 cu.header.offset = beg_of_comp_unit - buffer;
2807 cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
2809 cu.list_in_scope = &file_symbols;
2811 /* If this compilation unit was already read in, free the
2812 cached copy in order to read it in again. This is
2813 necessary because we skipped some symbols when we first
2814 read in the compilation unit (see load_partial_dies).
2815 This problem could be avoided, but the benefit is
2817 if (this_cu->cu != NULL)
2818 free_one_cached_comp_unit (this_cu->cu);
2820 /* Note that this is a pointer to our stack frame, being
2821 added to a global data structure. It will be cleaned up
2822 in free_stack_comp_unit when we finish with this
2823 compilation unit. */
2825 cu.per_cu = this_cu;
2827 /* Read the abbrevs for this compilation unit into a table. */
2828 dwarf2_read_abbrevs (abfd, &cu);
2829 make_cleanup (dwarf2_free_abbrev_table, &cu);
2831 /* Read the compilation unit die. */
2832 if (this_cu->from_debug_types)
2833 info_ptr += 8 /*signature*/ + cu.header.offset_size;
2834 init_cu_die_reader (&reader_specs, &cu);
2835 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
2838 if (this_cu->from_debug_types)
2840 /* offset,length haven't been set yet for type units. */
2841 this_cu->offset = cu.header.offset;
2842 this_cu->length = cu.header.length + cu.header.initial_length_size;
2844 else if (comp_unit_die->tag == DW_TAG_partial_unit)
2846 info_ptr = (beg_of_comp_unit + cu.header.length
2847 + cu.header.initial_length_size);
2848 do_cleanups (back_to_inner);
2852 /* Set the language we're debugging. */
2853 attr = dwarf2_attr (comp_unit_die, DW_AT_language, &cu);
2855 set_cu_language (DW_UNSND (attr), &cu);
2857 set_cu_language (language_minimal, &cu);
2859 /* Allocate a new partial symbol table structure. */
2860 attr = dwarf2_attr (comp_unit_die, DW_AT_name, &cu);
2861 pst = start_psymtab_common (objfile, objfile->section_offsets,
2862 (attr != NULL) ? DW_STRING (attr) : "",
2863 /* TEXTLOW and TEXTHIGH are set below. */
2865 objfile->global_psymbols.next,
2866 objfile->static_psymbols.next);
2868 attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, &cu);
2870 pst->dirname = DW_STRING (attr);
2872 pst->read_symtab_private = this_cu;
2874 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2876 /* Store the function that reads in the rest of the symbol table */
2877 pst->read_symtab = dwarf2_psymtab_to_symtab;
2879 this_cu->v.psymtab = pst;
2881 dwarf2_find_base_address (comp_unit_die, &cu);
2883 /* Possibly set the default values of LOWPC and HIGHPC from
2885 has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc,
2886 &best_highpc, &cu, pst);
2887 if (has_pc_info == 1 && best_lowpc < best_highpc)
2888 /* Store the contiguous range if it is not empty; it can be empty for
2889 CUs with no code. */
2890 addrmap_set_empty (objfile->psymtabs_addrmap,
2891 best_lowpc + baseaddr,
2892 best_highpc + baseaddr - 1, pst);
2894 /* Check if comp unit has_children.
2895 If so, read the rest of the partial symbols from this comp unit.
2896 If not, there's no more debug_info for this comp unit. */
2899 struct partial_die_info *first_die;
2900 CORE_ADDR lowpc, highpc;
2902 lowpc = ((CORE_ADDR) -1);
2903 highpc = ((CORE_ADDR) 0);
2905 first_die = load_partial_dies (abfd, buffer, info_ptr, 1, &cu);
2907 scan_partial_symbols (first_die, &lowpc, &highpc,
2908 ! has_pc_info, &cu);
2910 /* If we didn't find a lowpc, set it to highpc to avoid
2911 complaints from `maint check'. */
2912 if (lowpc == ((CORE_ADDR) -1))
2915 /* If the compilation unit didn't have an explicit address range,
2916 then use the information extracted from its child dies. */
2920 best_highpc = highpc;
2923 pst->textlow = best_lowpc + baseaddr;
2924 pst->texthigh = best_highpc + baseaddr;
2926 pst->n_global_syms = objfile->global_psymbols.next -
2927 (objfile->global_psymbols.list + pst->globals_offset);
2928 pst->n_static_syms = objfile->static_psymbols.next -
2929 (objfile->static_psymbols.list + pst->statics_offset);
2930 sort_pst_symbols (pst);
2932 info_ptr = (beg_of_comp_unit + cu.header.length
2933 + cu.header.initial_length_size);
2935 if (this_cu->from_debug_types)
2937 /* It's not clear we want to do anything with stmt lists here.
2938 Waiting to see what gcc ultimately does. */
2942 /* Get the list of files included in the current compilation unit,
2943 and build a psymtab for each of them. */
2944 dwarf2_build_include_psymtabs (&cu, comp_unit_die, pst);
2947 do_cleanups (back_to_inner);
2952 /* Traversal function for htab_traverse_noresize.
2953 Process one .debug_types comp-unit. */
2956 process_type_comp_unit (void **slot, void *info)
2958 struct signatured_type *entry = (struct signatured_type *) *slot;
2959 struct objfile *objfile = (struct objfile *) info;
2960 struct dwarf2_per_cu_data *this_cu;
2962 this_cu = &entry->per_cu;
2963 this_cu->from_debug_types = 1;
2965 gdb_assert (dwarf2_per_objfile->types.readin);
2966 process_psymtab_comp_unit (objfile, this_cu,
2967 dwarf2_per_objfile->types.buffer,
2968 dwarf2_per_objfile->types.buffer + entry->offset,
2969 dwarf2_per_objfile->types.size);
2974 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
2975 Build partial symbol tables for the .debug_types comp-units. */
2978 build_type_psymtabs (struct objfile *objfile)
2980 if (! create_debug_types_hash_table (objfile))
2983 htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
2984 process_type_comp_unit, objfile);
2987 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
2990 psymtabs_addrmap_cleanup (void *o)
2992 struct objfile *objfile = o;
2994 objfile->psymtabs_addrmap = NULL;
2997 /* Build the partial symbol table by doing a quick pass through the
2998 .debug_info and .debug_abbrev sections. */
3001 dwarf2_build_psymtabs_hard (struct objfile *objfile)
3004 struct cleanup *back_to, *addrmap_cleanup;
3005 struct obstack temp_obstack;
3007 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
3008 info_ptr = dwarf2_per_objfile->info.buffer;
3010 /* Any cached compilation units will be linked by the per-objfile
3011 read_in_chain. Make sure to free them when we're done. */
3012 back_to = make_cleanup (free_cached_comp_units, NULL);
3014 build_type_psymtabs (objfile);
3016 create_all_comp_units (objfile);
3018 /* Create a temporary address map on a temporary obstack. We later
3019 copy this to the final obstack. */
3020 obstack_init (&temp_obstack);
3021 make_cleanup_obstack_free (&temp_obstack);
3022 objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack);
3023 addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile);
3025 /* Since the objects we're extracting from .debug_info vary in
3026 length, only the individual functions to extract them (like
3027 read_comp_unit_head and load_partial_die) can really know whether
3028 the buffer is large enough to hold another complete object.
3030 At the moment, they don't actually check that. If .debug_info
3031 holds just one extra byte after the last compilation unit's dies,
3032 then read_comp_unit_head will happily read off the end of the
3033 buffer. read_partial_die is similarly casual. Those functions
3036 For this loop condition, simply checking whether there's any data
3037 left at all should be sufficient. */
3039 while (info_ptr < (dwarf2_per_objfile->info.buffer
3040 + dwarf2_per_objfile->info.size))
3042 struct dwarf2_per_cu_data *this_cu;
3044 this_cu = dwarf2_find_comp_unit (info_ptr - dwarf2_per_objfile->info.buffer,
3047 info_ptr = process_psymtab_comp_unit (objfile, this_cu,
3048 dwarf2_per_objfile->info.buffer,
3050 dwarf2_per_objfile->info.size);
3053 objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
3054 &objfile->objfile_obstack);
3055 discard_cleanups (addrmap_cleanup);
3057 do_cleanups (back_to);
3060 /* Load the partial DIEs for a secondary CU into memory. */
3063 load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu,
3064 struct objfile *objfile)
3066 bfd *abfd = objfile->obfd;
3067 gdb_byte *info_ptr, *beg_of_comp_unit;
3068 struct die_info *comp_unit_die;
3069 struct dwarf2_cu *cu;
3070 struct cleanup *back_to;
3071 struct attribute *attr;
3073 struct die_reader_specs reader_specs;
3075 gdb_assert (! this_cu->from_debug_types);
3077 gdb_assert (dwarf2_per_objfile->info.readin);
3078 info_ptr = dwarf2_per_objfile->info.buffer + this_cu->offset;
3079 beg_of_comp_unit = info_ptr;
3081 cu = alloc_one_comp_unit (objfile);
3083 /* ??? Missing cleanup for CU? */
3085 /* Link this compilation unit into the compilation unit tree. */
3087 cu->per_cu = this_cu;
3088 cu->type_hash = this_cu->type_hash;
3090 info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr,
3091 dwarf2_per_objfile->info.buffer,
3092 dwarf2_per_objfile->info.size,
3095 /* Complete the cu_header. */
3096 cu->header.offset = this_cu->offset;
3097 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
3099 /* Read the abbrevs for this compilation unit into a table. */
3100 dwarf2_read_abbrevs (abfd, cu);
3101 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
3103 /* Read the compilation unit die. */
3104 init_cu_die_reader (&reader_specs, cu);
3105 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
3108 /* Set the language we're debugging. */
3109 attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu);
3111 set_cu_language (DW_UNSND (attr), cu);
3113 set_cu_language (language_minimal, cu);
3115 /* Check if comp unit has_children.
3116 If so, read the rest of the partial symbols from this comp unit.
3117 If not, there's no more debug_info for this comp unit. */
3119 load_partial_dies (abfd, dwarf2_per_objfile->info.buffer, info_ptr, 0, cu);
3121 do_cleanups (back_to);
3124 /* Create a list of all compilation units in OBJFILE. We do this only
3125 if an inter-comp-unit reference is found; presumably if there is one,
3126 there will be many, and one will occur early in the .debug_info section.
3127 So there's no point in building this list incrementally. */
3130 create_all_comp_units (struct objfile *objfile)
3134 struct dwarf2_per_cu_data **all_comp_units;
3137 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
3138 info_ptr = dwarf2_per_objfile->info.buffer;
3142 all_comp_units = xmalloc (n_allocated
3143 * sizeof (struct dwarf2_per_cu_data *));
3145 while (info_ptr < dwarf2_per_objfile->info.buffer + dwarf2_per_objfile->info.size)
3147 unsigned int length, initial_length_size;
3148 struct dwarf2_per_cu_data *this_cu;
3149 unsigned int offset;
3151 offset = info_ptr - dwarf2_per_objfile->info.buffer;
3153 /* Read just enough information to find out where the next
3154 compilation unit is. */
3155 length = read_initial_length (objfile->obfd, info_ptr,
3156 &initial_length_size);
3158 /* Save the compilation unit for later lookup. */
3159 this_cu = obstack_alloc (&objfile->objfile_obstack,
3160 sizeof (struct dwarf2_per_cu_data));
3161 memset (this_cu, 0, sizeof (*this_cu));
3162 this_cu->offset = offset;
3163 this_cu->length = length + initial_length_size;
3164 this_cu->objfile = objfile;
3166 if (n_comp_units == n_allocated)
3169 all_comp_units = xrealloc (all_comp_units,
3171 * sizeof (struct dwarf2_per_cu_data *));
3173 all_comp_units[n_comp_units++] = this_cu;
3175 info_ptr = info_ptr + this_cu->length;
3178 dwarf2_per_objfile->all_comp_units
3179 = obstack_alloc (&objfile->objfile_obstack,
3180 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
3181 memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
3182 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
3183 xfree (all_comp_units);
3184 dwarf2_per_objfile->n_comp_units = n_comp_units;
3187 /* Process all loaded DIEs for compilation unit CU, starting at
3188 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
3189 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
3190 DW_AT_ranges). If NEED_PC is set, then this function will set
3191 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
3192 and record the covered ranges in the addrmap. */
3195 scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
3196 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
3198 struct partial_die_info *pdi;
3200 /* Now, march along the PDI's, descending into ones which have
3201 interesting children but skipping the children of the other ones,
3202 until we reach the end of the compilation unit. */
3208 fixup_partial_die (pdi, cu);
3210 /* Anonymous namespaces or modules have no name but have interesting
3211 children, so we need to look at them. Ditto for anonymous
3214 if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
3215 || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type)
3219 case DW_TAG_subprogram:
3220 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
3222 case DW_TAG_variable:
3223 case DW_TAG_typedef:
3224 case DW_TAG_union_type:
3225 if (!pdi->is_declaration)
3227 add_partial_symbol (pdi, cu);
3230 case DW_TAG_class_type:
3231 case DW_TAG_interface_type:
3232 case DW_TAG_structure_type:
3233 if (!pdi->is_declaration)
3235 add_partial_symbol (pdi, cu);
3238 case DW_TAG_enumeration_type:
3239 if (!pdi->is_declaration)
3240 add_partial_enumeration (pdi, cu);
3242 case DW_TAG_base_type:
3243 case DW_TAG_subrange_type:
3244 /* File scope base type definitions are added to the partial
3246 add_partial_symbol (pdi, cu);
3248 case DW_TAG_namespace:
3249 add_partial_namespace (pdi, lowpc, highpc, need_pc, cu);
3252 add_partial_module (pdi, lowpc, highpc, need_pc, cu);
3259 /* If the die has a sibling, skip to the sibling. */
3261 pdi = pdi->die_sibling;
3265 /* Functions used to compute the fully scoped name of a partial DIE.
3267 Normally, this is simple. For C++, the parent DIE's fully scoped
3268 name is concatenated with "::" and the partial DIE's name. For
3269 Java, the same thing occurs except that "." is used instead of "::".
3270 Enumerators are an exception; they use the scope of their parent
3271 enumeration type, i.e. the name of the enumeration type is not
3272 prepended to the enumerator.
3274 There are two complexities. One is DW_AT_specification; in this
3275 case "parent" means the parent of the target of the specification,
3276 instead of the direct parent of the DIE. The other is compilers
3277 which do not emit DW_TAG_namespace; in this case we try to guess
3278 the fully qualified name of structure types from their members'
3279 linkage names. This must be done using the DIE's children rather
3280 than the children of any DW_AT_specification target. We only need
3281 to do this for structures at the top level, i.e. if the target of
3282 any DW_AT_specification (if any; otherwise the DIE itself) does not
3285 /* Compute the scope prefix associated with PDI's parent, in
3286 compilation unit CU. The result will be allocated on CU's
3287 comp_unit_obstack, or a copy of the already allocated PDI->NAME
3288 field. NULL is returned if no prefix is necessary. */
3290 partial_die_parent_scope (struct partial_die_info *pdi,
3291 struct dwarf2_cu *cu)
3293 char *grandparent_scope;
3294 struct partial_die_info *parent, *real_pdi;
3296 /* We need to look at our parent DIE; if we have a DW_AT_specification,
3297 then this means the parent of the specification DIE. */
3300 while (real_pdi->has_specification)
3301 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
3303 parent = real_pdi->die_parent;
3307 if (parent->scope_set)
3308 return parent->scope;
3310 fixup_partial_die (parent, cu);
3312 grandparent_scope = partial_die_parent_scope (parent, cu);
3314 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
3315 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
3316 Work around this problem here. */
3317 if (cu->language == language_cplus
3318 && parent->tag == DW_TAG_namespace
3319 && strcmp (parent->name, "::") == 0
3320 && grandparent_scope == NULL)
3322 parent->scope = NULL;
3323 parent->scope_set = 1;
3327 if (parent->tag == DW_TAG_namespace
3328 || parent->tag == DW_TAG_module
3329 || parent->tag == DW_TAG_structure_type
3330 || parent->tag == DW_TAG_class_type
3331 || parent->tag == DW_TAG_interface_type
3332 || parent->tag == DW_TAG_union_type
3333 || parent->tag == DW_TAG_enumeration_type)
3335 if (grandparent_scope == NULL)
3336 parent->scope = parent->name;
3338 parent->scope = typename_concat (&cu->comp_unit_obstack, grandparent_scope,
3339 parent->name, 0, cu);
3341 else if (parent->tag == DW_TAG_enumerator)
3342 /* Enumerators should not get the name of the enumeration as a prefix. */
3343 parent->scope = grandparent_scope;
3346 /* FIXME drow/2004-04-01: What should we be doing with
3347 function-local names? For partial symbols, we should probably be
3349 complaint (&symfile_complaints,
3350 _("unhandled containing DIE tag %d for DIE at %d"),
3351 parent->tag, pdi->offset);
3352 parent->scope = grandparent_scope;
3355 parent->scope_set = 1;
3356 return parent->scope;
3359 /* Return the fully scoped name associated with PDI, from compilation unit
3360 CU. The result will be allocated with malloc. */
3362 partial_die_full_name (struct partial_die_info *pdi,
3363 struct dwarf2_cu *cu)
3367 parent_scope = partial_die_parent_scope (pdi, cu);
3368 if (parent_scope == NULL)
3371 return typename_concat (NULL, parent_scope, pdi->name, 0, cu);
3375 add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
3377 struct objfile *objfile = cu->objfile;
3379 char *actual_name = NULL;
3380 const struct partial_symbol *psym = NULL;
3382 int built_actual_name = 0;
3384 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3386 actual_name = partial_die_full_name (pdi, cu);
3388 built_actual_name = 1;
3390 if (actual_name == NULL)
3391 actual_name = pdi->name;
3395 case DW_TAG_subprogram:
3396 if (pdi->is_external || cu->language == language_ada)
3398 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
3399 of the global scope. But in Ada, we want to be able to access
3400 nested procedures globally. So all Ada subprograms are stored
3401 in the global scope. */
3402 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3403 mst_text, objfile); */
3404 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
3406 VAR_DOMAIN, LOC_BLOCK,
3407 &objfile->global_psymbols,
3408 0, pdi->lowpc + baseaddr,
3409 cu->language, objfile);
3413 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3414 mst_file_text, objfile); */
3415 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
3417 VAR_DOMAIN, LOC_BLOCK,
3418 &objfile->static_psymbols,
3419 0, pdi->lowpc + baseaddr,
3420 cu->language, objfile);
3423 case DW_TAG_variable:
3424 if (pdi->is_external)
3427 Don't enter into the minimal symbol tables as there is
3428 a minimal symbol table entry from the ELF symbols already.
3429 Enter into partial symbol table if it has a location
3430 descriptor or a type.
3431 If the location descriptor is missing, new_symbol will create
3432 a LOC_UNRESOLVED symbol, the address of the variable will then
3433 be determined from the minimal symbol table whenever the variable
3435 The address for the partial symbol table entry is not
3436 used by GDB, but it comes in handy for debugging partial symbol
3440 addr = decode_locdesc (pdi->locdesc, cu);
3441 if (pdi->locdesc || pdi->has_type)
3442 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
3444 VAR_DOMAIN, LOC_STATIC,
3445 &objfile->global_psymbols,
3447 cu->language, objfile);
3451 /* Static Variable. Skip symbols without location descriptors. */
3452 if (pdi->locdesc == NULL)
3454 if (built_actual_name)
3455 xfree (actual_name);
3458 addr = decode_locdesc (pdi->locdesc, cu);
3459 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
3460 mst_file_data, objfile); */
3461 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
3463 VAR_DOMAIN, LOC_STATIC,
3464 &objfile->static_psymbols,
3466 cu->language, objfile);
3469 case DW_TAG_typedef:
3470 case DW_TAG_base_type:
3471 case DW_TAG_subrange_type:
3472 add_psymbol_to_list (actual_name, strlen (actual_name),
3474 VAR_DOMAIN, LOC_TYPEDEF,
3475 &objfile->static_psymbols,
3476 0, (CORE_ADDR) 0, cu->language, objfile);
3478 case DW_TAG_namespace:
3479 add_psymbol_to_list (actual_name, strlen (actual_name),
3481 VAR_DOMAIN, LOC_TYPEDEF,
3482 &objfile->global_psymbols,
3483 0, (CORE_ADDR) 0, cu->language, objfile);
3485 case DW_TAG_class_type:
3486 case DW_TAG_interface_type:
3487 case DW_TAG_structure_type:
3488 case DW_TAG_union_type:
3489 case DW_TAG_enumeration_type:
3490 /* Skip external references. The DWARF standard says in the section
3491 about "Structure, Union, and Class Type Entries": "An incomplete
3492 structure, union or class type is represented by a structure,
3493 union or class entry that does not have a byte size attribute
3494 and that has a DW_AT_declaration attribute." */
3495 if (!pdi->has_byte_size && pdi->is_declaration)
3497 if (built_actual_name)
3498 xfree (actual_name);
3502 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
3503 static vs. global. */
3504 add_psymbol_to_list (actual_name, strlen (actual_name),
3506 STRUCT_DOMAIN, LOC_TYPEDEF,
3507 (cu->language == language_cplus
3508 || cu->language == language_java)
3509 ? &objfile->global_psymbols
3510 : &objfile->static_psymbols,
3511 0, (CORE_ADDR) 0, cu->language, objfile);
3514 case DW_TAG_enumerator:
3515 add_psymbol_to_list (actual_name, strlen (actual_name),
3517 VAR_DOMAIN, LOC_CONST,
3518 (cu->language == language_cplus
3519 || cu->language == language_java)
3520 ? &objfile->global_psymbols
3521 : &objfile->static_psymbols,
3522 0, (CORE_ADDR) 0, cu->language, objfile);
3528 if (built_actual_name)
3529 xfree (actual_name);
3532 /* Read a partial die corresponding to a namespace; also, add a symbol
3533 corresponding to that namespace to the symbol table. NAMESPACE is
3534 the name of the enclosing namespace. */
3537 add_partial_namespace (struct partial_die_info *pdi,
3538 CORE_ADDR *lowpc, CORE_ADDR *highpc,
3539 int need_pc, struct dwarf2_cu *cu)
3541 /* Add a symbol for the namespace. */
3543 add_partial_symbol (pdi, cu);
3545 /* Now scan partial symbols in that namespace. */
3547 if (pdi->has_children)
3548 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
3551 /* Read a partial die corresponding to a Fortran module. */
3554 add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
3555 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
3557 /* Now scan partial symbols in that module. */
3559 if (pdi->has_children)
3560 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
3563 /* Read a partial die corresponding to a subprogram and create a partial
3564 symbol for that subprogram. When the CU language allows it, this
3565 routine also defines a partial symbol for each nested subprogram
3566 that this subprogram contains.
3568 DIE my also be a lexical block, in which case we simply search
3569 recursively for suprograms defined inside that lexical block.
3570 Again, this is only performed when the CU language allows this
3571 type of definitions. */
3574 add_partial_subprogram (struct partial_die_info *pdi,
3575 CORE_ADDR *lowpc, CORE_ADDR *highpc,
3576 int need_pc, struct dwarf2_cu *cu)
3578 if (pdi->tag == DW_TAG_subprogram)
3580 if (pdi->has_pc_info)
3582 if (pdi->lowpc < *lowpc)
3583 *lowpc = pdi->lowpc;
3584 if (pdi->highpc > *highpc)
3585 *highpc = pdi->highpc;
3589 struct objfile *objfile = cu->objfile;
3591 baseaddr = ANOFFSET (objfile->section_offsets,
3592 SECT_OFF_TEXT (objfile));
3593 addrmap_set_empty (objfile->psymtabs_addrmap,
3594 pdi->lowpc + baseaddr,
3595 pdi->highpc - 1 + baseaddr,
3596 cu->per_cu->v.psymtab);
3598 if (!pdi->is_declaration)
3599 /* Ignore subprogram DIEs that do not have a name, they are
3600 illegal. Do not emit a complaint at this point, we will
3601 do so when we convert this psymtab into a symtab. */
3603 add_partial_symbol (pdi, cu);
3607 if (! pdi->has_children)
3610 if (cu->language == language_ada)
3612 pdi = pdi->die_child;
3615 fixup_partial_die (pdi, cu);
3616 if (pdi->tag == DW_TAG_subprogram
3617 || pdi->tag == DW_TAG_lexical_block)
3618 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
3619 pdi = pdi->die_sibling;
3624 /* See if we can figure out if the class lives in a namespace. We do
3625 this by looking for a member function; its demangled name will
3626 contain namespace info, if there is any. */
3629 guess_structure_name (struct partial_die_info *struct_pdi,
3630 struct dwarf2_cu *cu)
3632 if ((cu->language == language_cplus
3633 || cu->language == language_java)
3634 && cu->has_namespace_info == 0
3635 && struct_pdi->has_children)
3637 /* NOTE: carlton/2003-10-07: Getting the info this way changes
3638 what template types look like, because the demangler
3639 frequently doesn't give the same name as the debug info. We
3640 could fix this by only using the demangled name to get the
3641 prefix (but see comment in read_structure_type). */
3643 struct partial_die_info *real_pdi;
3645 /* If this DIE (this DIE's specification, if any) has a parent, then
3646 we should not do this. We'll prepend the parent's fully qualified
3647 name when we create the partial symbol. */
3649 real_pdi = struct_pdi;
3650 while (real_pdi->has_specification)
3651 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
3653 if (real_pdi->die_parent != NULL)
3658 /* Read a partial die corresponding to an enumeration type. */
3661 add_partial_enumeration (struct partial_die_info *enum_pdi,
3662 struct dwarf2_cu *cu)
3664 struct partial_die_info *pdi;
3666 if (enum_pdi->name != NULL)
3667 add_partial_symbol (enum_pdi, cu);
3669 pdi = enum_pdi->die_child;
3672 if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
3673 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
3675 add_partial_symbol (pdi, cu);
3676 pdi = pdi->die_sibling;
3680 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
3681 Return the corresponding abbrev, or NULL if the number is zero (indicating
3682 an empty DIE). In either case *BYTES_READ will be set to the length of
3683 the initial number. */
3685 static struct abbrev_info *
3686 peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
3687 struct dwarf2_cu *cu)
3689 bfd *abfd = cu->objfile->obfd;
3690 unsigned int abbrev_number;
3691 struct abbrev_info *abbrev;
3693 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
3695 if (abbrev_number == 0)
3698 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
3701 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number,
3702 bfd_get_filename (abfd));
3708 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
3709 Returns a pointer to the end of a series of DIEs, terminated by an empty
3710 DIE. Any children of the skipped DIEs will also be skipped. */
3713 skip_children (gdb_byte *buffer, gdb_byte *info_ptr, struct dwarf2_cu *cu)
3715 struct abbrev_info *abbrev;
3716 unsigned int bytes_read;
3720 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
3722 return info_ptr + bytes_read;
3724 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
3728 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
3729 INFO_PTR should point just after the initial uleb128 of a DIE, and the
3730 abbrev corresponding to that skipped uleb128 should be passed in
3731 ABBREV. Returns a pointer to this DIE's sibling, skipping any
3735 skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
3736 struct abbrev_info *abbrev, struct dwarf2_cu *cu)
3738 unsigned int bytes_read;
3739 struct attribute attr;
3740 bfd *abfd = cu->objfile->obfd;
3741 unsigned int form, i;
3743 for (i = 0; i < abbrev->num_attrs; i++)
3745 /* The only abbrev we care about is DW_AT_sibling. */
3746 if (abbrev->attrs[i].name == DW_AT_sibling)
3748 read_attribute (&attr, &abbrev->attrs[i],
3749 abfd, info_ptr, cu);
3750 if (attr.form == DW_FORM_ref_addr)
3751 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
3753 return buffer + dwarf2_get_ref_die_offset (&attr);
3756 /* If it isn't DW_AT_sibling, skip this attribute. */
3757 form = abbrev->attrs[i].form;
3761 case DW_FORM_ref_addr:
3762 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
3763 and later it is offset sized. */
3764 if (cu->header.version == 2)
3765 info_ptr += cu->header.addr_size;
3767 info_ptr += cu->header.offset_size;
3770 info_ptr += cu->header.addr_size;
3777 case DW_FORM_flag_present:
3792 case DW_FORM_string:
3793 read_string (abfd, info_ptr, &bytes_read);
3794 info_ptr += bytes_read;
3796 case DW_FORM_sec_offset:
3798 info_ptr += cu->header.offset_size;
3800 case DW_FORM_exprloc:
3802 info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
3803 info_ptr += bytes_read;
3805 case DW_FORM_block1:
3806 info_ptr += 1 + read_1_byte (abfd, info_ptr);
3808 case DW_FORM_block2:
3809 info_ptr += 2 + read_2_bytes (abfd, info_ptr);
3811 case DW_FORM_block4:
3812 info_ptr += 4 + read_4_bytes (abfd, info_ptr);
3816 case DW_FORM_ref_udata:
3817 info_ptr = skip_leb128 (abfd, info_ptr);
3819 case DW_FORM_indirect:
3820 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
3821 info_ptr += bytes_read;
3822 /* We need to continue parsing from here, so just go back to
3824 goto skip_attribute;
3827 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
3828 dwarf_form_name (form),
3829 bfd_get_filename (abfd));
3833 if (abbrev->has_children)
3834 return skip_children (buffer, info_ptr, cu);
3839 /* Locate ORIG_PDI's sibling.
3840 INFO_PTR should point to the start of the next DIE after ORIG_PDI
3844 locate_pdi_sibling (struct partial_die_info *orig_pdi,
3845 gdb_byte *buffer, gdb_byte *info_ptr,
3846 bfd *abfd, struct dwarf2_cu *cu)
3848 /* Do we know the sibling already? */
3850 if (orig_pdi->sibling)
3851 return orig_pdi->sibling;
3853 /* Are there any children to deal with? */
3855 if (!orig_pdi->has_children)
3858 /* Skip the children the long way. */
3860 return skip_children (buffer, info_ptr, cu);
3863 /* Expand this partial symbol table into a full symbol table. */
3866 dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
3872 warning (_("bug: psymtab for %s is already read in."), pst->filename);
3878 printf_filtered (_("Reading in symbols for %s..."), pst->filename);
3879 gdb_flush (gdb_stdout);
3882 /* Restore our global data. */
3883 dwarf2_per_objfile = objfile_data (pst->objfile,
3884 dwarf2_objfile_data_key);
3886 /* If this psymtab is constructed from a debug-only objfile, the
3887 has_section_at_zero flag will not necessarily be correct. We
3888 can get the correct value for this flag by looking at the data
3889 associated with the (presumably stripped) associated objfile. */
3890 if (pst->objfile->separate_debug_objfile_backlink)
3892 struct dwarf2_per_objfile *dpo_backlink
3893 = objfile_data (pst->objfile->separate_debug_objfile_backlink,
3894 dwarf2_objfile_data_key);
3896 dwarf2_per_objfile->has_section_at_zero
3897 = dpo_backlink->has_section_at_zero;
3900 psymtab_to_symtab_1 (pst);
3902 /* Finish up the debug error message. */
3904 printf_filtered (_("done.\n"));
3909 /* Add PER_CU to the queue. */
3912 queue_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
3914 struct dwarf2_queue_item *item;
3917 item = xmalloc (sizeof (*item));
3918 item->per_cu = per_cu;
3921 if (dwarf2_queue == NULL)
3922 dwarf2_queue = item;
3924 dwarf2_queue_tail->next = item;
3926 dwarf2_queue_tail = item;
3929 /* Process the queue. */
3932 process_queue (struct objfile *objfile)
3934 struct dwarf2_queue_item *item, *next_item;
3936 /* The queue starts out with one item, but following a DIE reference
3937 may load a new CU, adding it to the end of the queue. */
3938 for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
3940 if (dwarf2_per_objfile->using_index
3941 ? !item->per_cu->v.quick->symtab
3942 : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin))
3943 process_full_comp_unit (item->per_cu);
3945 item->per_cu->queued = 0;
3946 next_item = item->next;
3950 dwarf2_queue_tail = NULL;
3953 /* Free all allocated queue entries. This function only releases anything if
3954 an error was thrown; if the queue was processed then it would have been
3955 freed as we went along. */
3958 dwarf2_release_queue (void *dummy)
3960 struct dwarf2_queue_item *item, *last;
3962 item = dwarf2_queue;
3965 /* Anything still marked queued is likely to be in an
3966 inconsistent state, so discard it. */
3967 if (item->per_cu->queued)
3969 if (item->per_cu->cu != NULL)
3970 free_one_cached_comp_unit (item->per_cu->cu);
3971 item->per_cu->queued = 0;
3979 dwarf2_queue = dwarf2_queue_tail = NULL;
3982 /* Read in full symbols for PST, and anything it depends on. */
3985 psymtab_to_symtab_1 (struct partial_symtab *pst)
3987 struct dwarf2_per_cu_data *per_cu;
3988 struct cleanup *back_to;
3991 for (i = 0; i < pst->number_of_dependencies; i++)
3992 if (!pst->dependencies[i]->readin)
3994 /* Inform about additional files that need to be read in. */
3997 /* FIXME: i18n: Need to make this a single string. */
3998 fputs_filtered (" ", gdb_stdout);
4000 fputs_filtered ("and ", gdb_stdout);
4002 printf_filtered ("%s...", pst->dependencies[i]->filename);
4003 wrap_here (""); /* Flush output */
4004 gdb_flush (gdb_stdout);
4006 psymtab_to_symtab_1 (pst->dependencies[i]);
4009 per_cu = pst->read_symtab_private;
4013 /* It's an include file, no symbols to read for it.
4014 Everything is in the parent symtab. */
4019 dw2_do_instantiate_symtab (pst->objfile, per_cu);
4022 /* Load the DIEs associated with PER_CU into memory. */
4025 load_full_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
4027 bfd *abfd = objfile->obfd;
4028 struct dwarf2_cu *cu;
4029 unsigned int offset;
4030 gdb_byte *info_ptr, *beg_of_comp_unit;
4031 struct cleanup *back_to, *free_cu_cleanup;
4032 struct attribute *attr;
4034 gdb_assert (! per_cu->from_debug_types);
4036 /* Set local variables from the partial symbol table info. */
4037 offset = per_cu->offset;
4039 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
4040 info_ptr = dwarf2_per_objfile->info.buffer + offset;
4041 beg_of_comp_unit = info_ptr;
4043 cu = alloc_one_comp_unit (objfile);
4045 /* If an error occurs while loading, release our storage. */
4046 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
4048 /* Read in the comp_unit header. */
4049 info_ptr = read_comp_unit_head (&cu->header, info_ptr, abfd);
4051 /* Complete the cu_header. */
4052 cu->header.offset = offset;
4053 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
4055 /* Read the abbrevs for this compilation unit. */
4056 dwarf2_read_abbrevs (abfd, cu);
4057 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
4059 /* Link this compilation unit into the compilation unit tree. */
4061 cu->per_cu = per_cu;
4062 cu->type_hash = per_cu->type_hash;
4064 cu->dies = read_comp_unit (info_ptr, cu);
4066 /* We try not to read any attributes in this function, because not
4067 all objfiles needed for references have been loaded yet, and symbol
4068 table processing isn't initialized. But we have to set the CU language,
4069 or we won't be able to build types correctly. */
4070 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
4072 set_cu_language (DW_UNSND (attr), cu);
4074 set_cu_language (language_minimal, cu);
4076 /* Similarly, if we do not read the producer, we can not apply
4077 producer-specific interpretation. */
4078 attr = dwarf2_attr (cu->dies, DW_AT_producer, cu);
4080 cu->producer = DW_STRING (attr);
4082 /* Link this CU into read_in_chain. */
4083 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
4084 dwarf2_per_objfile->read_in_chain = per_cu;
4086 do_cleanups (back_to);
4088 /* We've successfully allocated this compilation unit. Let our caller
4089 clean it up when finished with it. */
4090 discard_cleanups (free_cu_cleanup);
4093 /* Generate full symbol information for PST and CU, whose DIEs have
4094 already been loaded into memory. */
4097 process_full_comp_unit (struct dwarf2_per_cu_data *per_cu)
4099 struct dwarf2_cu *cu = per_cu->cu;
4100 struct objfile *objfile = per_cu->objfile;
4101 CORE_ADDR lowpc, highpc;
4102 struct symtab *symtab;
4103 struct cleanup *back_to;
4106 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
4109 back_to = make_cleanup (really_free_pendings, NULL);
4111 cu->list_in_scope = &file_symbols;
4113 dwarf2_find_base_address (cu->dies, cu);
4115 /* Do line number decoding in read_file_scope () */
4116 process_die (cu->dies, cu);
4118 /* Some compilers don't define a DW_AT_high_pc attribute for the
4119 compilation unit. If the DW_AT_high_pc is missing, synthesize
4120 it, by scanning the DIE's below the compilation unit. */
4121 get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
4123 symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
4125 /* Set symtab language to language from DW_AT_language.
4126 If the compilation is from a C file generated by language preprocessors,
4127 do not set the language if it was already deduced by start_subfile. */
4129 && !(cu->language == language_c && symtab->language != language_c))
4131 symtab->language = cu->language;
4134 if (dwarf2_per_objfile->using_index)
4135 per_cu->v.quick->symtab = symtab;
4138 struct partial_symtab *pst = per_cu->v.psymtab;
4139 pst->symtab = symtab;
4143 do_cleanups (back_to);
4146 /* Process a die and its children. */
4149 process_die (struct die_info *die, struct dwarf2_cu *cu)
4153 case DW_TAG_padding:
4155 case DW_TAG_compile_unit:
4156 read_file_scope (die, cu);
4158 case DW_TAG_type_unit:
4159 read_type_unit_scope (die, cu);
4161 case DW_TAG_subprogram:
4162 case DW_TAG_inlined_subroutine:
4163 read_func_scope (die, cu);
4165 case DW_TAG_lexical_block:
4166 case DW_TAG_try_block:
4167 case DW_TAG_catch_block:
4168 read_lexical_block_scope (die, cu);
4170 case DW_TAG_class_type:
4171 case DW_TAG_interface_type:
4172 case DW_TAG_structure_type:
4173 case DW_TAG_union_type:
4174 process_structure_scope (die, cu);
4176 case DW_TAG_enumeration_type:
4177 process_enumeration_scope (die, cu);
4180 /* These dies have a type, but processing them does not create
4181 a symbol or recurse to process the children. Therefore we can
4182 read them on-demand through read_type_die. */
4183 case DW_TAG_subroutine_type:
4184 case DW_TAG_set_type:
4185 case DW_TAG_array_type:
4186 case DW_TAG_pointer_type:
4187 case DW_TAG_ptr_to_member_type:
4188 case DW_TAG_reference_type:
4189 case DW_TAG_string_type:
4192 case DW_TAG_base_type:
4193 case DW_TAG_subrange_type:
4194 case DW_TAG_typedef:
4195 case DW_TAG_const_type:
4196 case DW_TAG_volatile_type:
4197 /* Add a typedef symbol for the type definition, if it has a
4199 new_symbol (die, read_type_die (die, cu), cu);
4201 case DW_TAG_common_block:
4202 read_common_block (die, cu);
4204 case DW_TAG_common_inclusion:
4206 case DW_TAG_namespace:
4207 processing_has_namespace_info = 1;
4208 read_namespace (die, cu);
4211 processing_has_namespace_info = 1;
4212 read_module (die, cu);
4214 case DW_TAG_imported_declaration:
4215 case DW_TAG_imported_module:
4216 processing_has_namespace_info = 1;
4217 if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
4218 || cu->language != language_fortran))
4219 complaint (&symfile_complaints, _("Tag '%s' has unexpected children"),
4220 dwarf_tag_name (die->tag));
4221 read_import_statement (die, cu);
4224 new_symbol (die, NULL, cu);
4229 /* A helper function for dwarf2_compute_name which determines whether DIE
4230 needs to have the name of the scope prepended to the name listed in the
4234 die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu)
4236 struct attribute *attr;
4240 case DW_TAG_namespace:
4241 case DW_TAG_typedef:
4242 case DW_TAG_class_type:
4243 case DW_TAG_interface_type:
4244 case DW_TAG_structure_type:
4245 case DW_TAG_union_type:
4246 case DW_TAG_enumeration_type:
4247 case DW_TAG_enumerator:
4248 case DW_TAG_subprogram:
4252 case DW_TAG_variable:
4253 /* We only need to prefix "globally" visible variables. These include
4254 any variable marked with DW_AT_external or any variable that
4255 lives in a namespace. [Variables in anonymous namespaces
4256 require prefixing, but they are not DW_AT_external.] */
4258 if (dwarf2_attr (die, DW_AT_specification, cu))
4260 struct dwarf2_cu *spec_cu = cu;
4262 return die_needs_namespace (die_specification (die, &spec_cu),
4266 attr = dwarf2_attr (die, DW_AT_external, cu);
4267 if (attr == NULL && die->parent->tag != DW_TAG_namespace
4268 && die->parent->tag != DW_TAG_module)
4270 /* A variable in a lexical block of some kind does not need a
4271 namespace, even though in C++ such variables may be external
4272 and have a mangled name. */
4273 if (die->parent->tag == DW_TAG_lexical_block
4274 || die->parent->tag == DW_TAG_try_block
4275 || die->parent->tag == DW_TAG_catch_block
4276 || die->parent->tag == DW_TAG_subprogram)
4285 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
4286 compute the physname for the object, which include a method's
4287 formal parameters (C++/Java) and return type (Java).
4289 For Ada, return the DIE's linkage name rather than the fully qualified
4290 name. PHYSNAME is ignored..
4292 The result is allocated on the objfile_obstack and canonicalized. */
4295 dwarf2_compute_name (char *name, struct die_info *die, struct dwarf2_cu *cu,
4299 name = dwarf2_name (die, cu);
4301 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
4302 compute it by typename_concat inside GDB. */
4303 if (cu->language == language_ada
4304 || (cu->language == language_fortran && physname))
4306 /* For Ada unit, we prefer the linkage name over the name, as
4307 the former contains the exported name, which the user expects
4308 to be able to reference. Ideally, we want the user to be able
4309 to reference this entity using either natural or linkage name,
4310 but we haven't started looking at this enhancement yet. */
4311 struct attribute *attr;
4313 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
4315 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
4316 if (attr && DW_STRING (attr))
4317 return DW_STRING (attr);
4320 /* These are the only languages we know how to qualify names in. */
4322 && (cu->language == language_cplus || cu->language == language_java
4323 || cu->language == language_fortran))
4325 if (die_needs_namespace (die, cu))
4329 struct ui_file *buf;
4331 prefix = determine_prefix (die, cu);
4332 buf = mem_fileopen ();
4333 if (*prefix != '\0')
4335 char *prefixed_name = typename_concat (NULL, prefix, name,
4338 fputs_unfiltered (prefixed_name, buf);
4339 xfree (prefixed_name);
4342 fputs_unfiltered (name ? name : "", buf);
4344 /* For Java and C++ methods, append formal parameter type
4345 information, if PHYSNAME. */
4347 if (physname && die->tag == DW_TAG_subprogram
4348 && (cu->language == language_cplus
4349 || cu->language == language_java))
4351 struct type *type = read_type_die (die, cu);
4353 c_type_print_args (type, buf, 0, cu->language);
4355 if (cu->language == language_java)
4357 /* For java, we must append the return type to method
4359 if (die->tag == DW_TAG_subprogram)
4360 java_print_type (TYPE_TARGET_TYPE (type), "", buf,
4363 else if (cu->language == language_cplus)
4365 if (TYPE_NFIELDS (type) > 0
4366 && TYPE_FIELD_ARTIFICIAL (type, 0)
4367 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 0))))
4368 fputs_unfiltered (" const", buf);
4372 name = ui_file_obsavestring (buf, &cu->objfile->objfile_obstack,
4374 ui_file_delete (buf);
4376 if (cu->language == language_cplus)
4379 = dwarf2_canonicalize_name (name, cu,
4380 &cu->objfile->objfile_obstack);
4391 /* Return the fully qualified name of DIE, based on its DW_AT_name.
4392 If scope qualifiers are appropriate they will be added. The result
4393 will be allocated on the objfile_obstack, or NULL if the DIE does
4394 not have a name. NAME may either be from a previous call to
4395 dwarf2_name or NULL.
4397 The output string will be canonicalized (if C++/Java). */
4400 dwarf2_full_name (char *name, struct die_info *die, struct dwarf2_cu *cu)
4402 return dwarf2_compute_name (name, die, cu, 0);
4405 /* Construct a physname for the given DIE in CU. NAME may either be
4406 from a previous call to dwarf2_name or NULL. The result will be
4407 allocated on the objfile_objstack or NULL if the DIE does not have a
4410 The output string will be canonicalized (if C++/Java). */
4413 dwarf2_physname (char *name, struct die_info *die, struct dwarf2_cu *cu)
4415 return dwarf2_compute_name (name, die, cu, 1);
4418 /* Read the import statement specified by the given die and record it. */
4421 read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
4423 struct attribute *import_attr;
4424 struct die_info *imported_die;
4425 struct dwarf2_cu *imported_cu;
4426 const char *imported_name;
4427 const char *imported_name_prefix;
4428 const char *canonical_name;
4429 const char *import_alias;
4430 const char *imported_declaration = NULL;
4431 const char *import_prefix;
4435 import_attr = dwarf2_attr (die, DW_AT_import, cu);
4436 if (import_attr == NULL)
4438 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
4439 dwarf_tag_name (die->tag));
4444 imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu);
4445 imported_name = dwarf2_name (imported_die, imported_cu);
4446 if (imported_name == NULL)
4448 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
4450 The import in the following code:
4464 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
4465 <52> DW_AT_decl_file : 1
4466 <53> DW_AT_decl_line : 6
4467 <54> DW_AT_import : <0x75>
4468 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
4470 <5b> DW_AT_decl_file : 1
4471 <5c> DW_AT_decl_line : 2
4472 <5d> DW_AT_type : <0x6e>
4474 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
4475 <76> DW_AT_byte_size : 4
4476 <77> DW_AT_encoding : 5 (signed)
4478 imports the wrong die ( 0x75 instead of 0x58 ).
4479 This case will be ignored until the gcc bug is fixed. */
4483 /* Figure out the local name after import. */
4484 import_alias = dwarf2_name (die, cu);
4486 /* Figure out where the statement is being imported to. */
4487 import_prefix = determine_prefix (die, cu);
4489 /* Figure out what the scope of the imported die is and prepend it
4490 to the name of the imported die. */
4491 imported_name_prefix = determine_prefix (imported_die, imported_cu);
4493 if (imported_die->tag != DW_TAG_namespace
4494 && imported_die->tag != DW_TAG_module)
4496 imported_declaration = imported_name;
4497 canonical_name = imported_name_prefix;
4499 else if (strlen (imported_name_prefix) > 0)
4501 temp = alloca (strlen (imported_name_prefix)
4502 + 2 + strlen (imported_name) + 1);
4503 strcpy (temp, imported_name_prefix);
4504 strcat (temp, "::");
4505 strcat (temp, imported_name);
4506 canonical_name = temp;
4509 canonical_name = imported_name;
4511 cp_add_using_directive (import_prefix,
4514 imported_declaration,
4515 &cu->objfile->objfile_obstack);
4519 initialize_cu_func_list (struct dwarf2_cu *cu)
4521 cu->first_fn = cu->last_fn = cu->cached_fn = NULL;
4525 free_cu_line_header (void *arg)
4527 struct dwarf2_cu *cu = arg;
4529 free_line_header (cu->line_header);
4530 cu->line_header = NULL;
4534 find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu,
4535 char **name, char **comp_dir)
4537 struct attribute *attr;
4542 /* Find the filename. Do not use dwarf2_name here, since the filename
4543 is not a source language identifier. */
4544 attr = dwarf2_attr (die, DW_AT_name, cu);
4547 *name = DW_STRING (attr);
4550 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
4552 *comp_dir = DW_STRING (attr);
4553 else if (*name != NULL && IS_ABSOLUTE_PATH (*name))
4555 *comp_dir = ldirname (*name);
4556 if (*comp_dir != NULL)
4557 make_cleanup (xfree, *comp_dir);
4559 if (*comp_dir != NULL)
4561 /* Irix 6.2 native cc prepends <machine>.: to the compilation
4562 directory, get rid of it. */
4563 char *cp = strchr (*comp_dir, ':');
4565 if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/')
4570 *name = "<unknown>";
4574 read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
4576 struct objfile *objfile = cu->objfile;
4577 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
4578 CORE_ADDR lowpc = ((CORE_ADDR) -1);
4579 CORE_ADDR highpc = ((CORE_ADDR) 0);
4580 struct attribute *attr;
4582 char *comp_dir = NULL;
4583 struct die_info *child_die;
4584 bfd *abfd = objfile->obfd;
4585 struct line_header *line_header = 0;
4588 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
4590 get_scope_pc_bounds (die, &lowpc, &highpc, cu);
4592 /* If we didn't find a lowpc, set it to highpc to avoid complaints
4593 from finish_block. */
4594 if (lowpc == ((CORE_ADDR) -1))
4599 find_file_and_directory (die, cu, &name, &comp_dir);
4601 attr = dwarf2_attr (die, DW_AT_language, cu);
4604 set_cu_language (DW_UNSND (attr), cu);
4607 attr = dwarf2_attr (die, DW_AT_producer, cu);
4609 cu->producer = DW_STRING (attr);
4611 /* We assume that we're processing GCC output. */
4612 processing_gcc_compilation = 2;
4614 processing_has_namespace_info = 0;
4616 start_symtab (name, comp_dir, lowpc);
4617 record_debugformat ("DWARF 2");
4618 record_producer (cu->producer);
4620 initialize_cu_func_list (cu);
4622 /* Decode line number information if present. We do this before
4623 processing child DIEs, so that the line header table is available
4624 for DW_AT_decl_file. */
4625 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
4628 unsigned int line_offset = DW_UNSND (attr);
4629 line_header = dwarf_decode_line_header (line_offset, abfd, cu);
4632 cu->line_header = line_header;
4633 make_cleanup (free_cu_line_header, cu);
4634 dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL);
4638 /* Process all dies in compilation unit. */
4639 if (die->child != NULL)
4641 child_die = die->child;
4642 while (child_die && child_die->tag)
4644 process_die (child_die, cu);
4645 child_die = sibling_die (child_die);
4649 /* Decode macro information, if present. Dwarf 2 macro information
4650 refers to information in the line number info statement program
4651 header, so we can only read it if we've read the header
4653 attr = dwarf2_attr (die, DW_AT_macro_info, cu);
4654 if (attr && line_header)
4656 unsigned int macro_offset = DW_UNSND (attr);
4658 dwarf_decode_macros (line_header, macro_offset,
4659 comp_dir, abfd, cu);
4661 do_cleanups (back_to);
4664 /* For TUs we want to skip the first top level sibling if it's not the
4665 actual type being defined by this TU. In this case the first top
4666 level sibling is there to provide context only. */
4669 read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
4671 struct objfile *objfile = cu->objfile;
4672 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
4674 struct attribute *attr;
4676 char *comp_dir = NULL;
4677 struct die_info *child_die;
4678 bfd *abfd = objfile->obfd;
4680 /* start_symtab needs a low pc, but we don't really have one.
4681 Do what read_file_scope would do in the absence of such info. */
4682 lowpc = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
4684 /* Find the filename. Do not use dwarf2_name here, since the filename
4685 is not a source language identifier. */
4686 attr = dwarf2_attr (die, DW_AT_name, cu);
4688 name = DW_STRING (attr);
4690 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
4692 comp_dir = DW_STRING (attr);
4693 else if (name != NULL && IS_ABSOLUTE_PATH (name))
4695 comp_dir = ldirname (name);
4696 if (comp_dir != NULL)
4697 make_cleanup (xfree, comp_dir);
4703 attr = dwarf2_attr (die, DW_AT_language, cu);
4705 set_cu_language (DW_UNSND (attr), cu);
4707 /* This isn't technically needed today. It is done for symmetry
4708 with read_file_scope. */
4709 attr = dwarf2_attr (die, DW_AT_producer, cu);
4711 cu->producer = DW_STRING (attr);
4713 /* We assume that we're processing GCC output. */
4714 processing_gcc_compilation = 2;
4716 processing_has_namespace_info = 0;
4718 start_symtab (name, comp_dir, lowpc);
4719 record_debugformat ("DWARF 2");
4720 record_producer (cu->producer);
4722 /* Process the dies in the type unit. */
4723 if (die->child == NULL)
4725 dump_die_for_error (die);
4726 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
4727 bfd_get_filename (abfd));
4730 child_die = die->child;
4732 while (child_die && child_die->tag)
4734 process_die (child_die, cu);
4736 child_die = sibling_die (child_die);
4739 do_cleanups (back_to);
4743 add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc,
4744 struct dwarf2_cu *cu)
4746 struct function_range *thisfn;
4748 thisfn = (struct function_range *)
4749 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range));
4750 thisfn->name = name;
4751 thisfn->lowpc = lowpc;
4752 thisfn->highpc = highpc;
4753 thisfn->seen_line = 0;
4754 thisfn->next = NULL;
4756 if (cu->last_fn == NULL)
4757 cu->first_fn = thisfn;
4759 cu->last_fn->next = thisfn;
4761 cu->last_fn = thisfn;
4764 /* qsort helper for inherit_abstract_dies. */
4767 unsigned_int_compar (const void *ap, const void *bp)
4769 unsigned int a = *(unsigned int *) ap;
4770 unsigned int b = *(unsigned int *) bp;
4772 return (a > b) - (b > a);
4775 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
4776 Inherit only the children of the DW_AT_abstract_origin DIE not being already
4777 referenced by DW_AT_abstract_origin from the children of the current DIE. */
4780 inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
4782 struct die_info *child_die;
4783 unsigned die_children_count;
4784 /* CU offsets which were referenced by children of the current DIE. */
4786 unsigned *offsets_end, *offsetp;
4787 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
4788 struct die_info *origin_die;
4789 /* Iterator of the ORIGIN_DIE children. */
4790 struct die_info *origin_child_die;
4791 struct cleanup *cleanups;
4792 struct attribute *attr;
4794 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
4798 origin_die = follow_die_ref (die, attr, &cu);
4799 if (die->tag != origin_die->tag
4800 && !(die->tag == DW_TAG_inlined_subroutine
4801 && origin_die->tag == DW_TAG_subprogram))
4802 complaint (&symfile_complaints,
4803 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
4804 die->offset, origin_die->offset);
4806 child_die = die->child;
4807 die_children_count = 0;
4808 while (child_die && child_die->tag)
4810 child_die = sibling_die (child_die);
4811 die_children_count++;
4813 offsets = xmalloc (sizeof (*offsets) * die_children_count);
4814 cleanups = make_cleanup (xfree, offsets);
4816 offsets_end = offsets;
4817 child_die = die->child;
4818 while (child_die && child_die->tag)
4820 /* For each CHILD_DIE, find the corresponding child of
4821 ORIGIN_DIE. If there is more than one layer of
4822 DW_AT_abstract_origin, follow them all; there shouldn't be,
4823 but GCC versions at least through 4.4 generate this (GCC PR
4825 struct die_info *child_origin_die = child_die;
4829 attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, cu);
4832 child_origin_die = follow_die_ref (child_origin_die, attr, &cu);
4835 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
4836 counterpart may exist. */
4837 if (child_origin_die != child_die)
4839 if (child_die->tag != child_origin_die->tag
4840 && !(child_die->tag == DW_TAG_inlined_subroutine
4841 && child_origin_die->tag == DW_TAG_subprogram))
4842 complaint (&symfile_complaints,
4843 _("Child DIE 0x%x and its abstract origin 0x%x have "
4844 "different tags"), child_die->offset,
4845 child_origin_die->offset);
4846 if (child_origin_die->parent != origin_die)
4847 complaint (&symfile_complaints,
4848 _("Child DIE 0x%x and its abstract origin 0x%x have "
4849 "different parents"), child_die->offset,
4850 child_origin_die->offset);
4852 *offsets_end++ = child_origin_die->offset;
4854 child_die = sibling_die (child_die);
4856 qsort (offsets, offsets_end - offsets, sizeof (*offsets),
4857 unsigned_int_compar);
4858 for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++)
4859 if (offsetp[-1] == *offsetp)
4860 complaint (&symfile_complaints, _("Multiple children of DIE 0x%x refer "
4861 "to DIE 0x%x as their abstract origin"),
4862 die->offset, *offsetp);
4865 origin_child_die = origin_die->child;
4866 while (origin_child_die && origin_child_die->tag)
4868 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
4869 while (offsetp < offsets_end && *offsetp < origin_child_die->offset)
4871 if (offsetp >= offsets_end || *offsetp > origin_child_die->offset)
4873 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
4874 process_die (origin_child_die, cu);
4876 origin_child_die = sibling_die (origin_child_die);
4879 do_cleanups (cleanups);
4883 read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
4885 struct objfile *objfile = cu->objfile;
4886 struct context_stack *new;
4889 struct die_info *child_die;
4890 struct attribute *attr, *call_line, *call_file;
4893 struct block *block;
4894 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
4898 /* If we do not have call site information, we can't show the
4899 caller of this inlined function. That's too confusing, so
4900 only use the scope for local variables. */
4901 call_line = dwarf2_attr (die, DW_AT_call_line, cu);
4902 call_file = dwarf2_attr (die, DW_AT_call_file, cu);
4903 if (call_line == NULL || call_file == NULL)
4905 read_lexical_block_scope (die, cu);
4910 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
4912 name = dwarf2_name (die, cu);
4914 /* Ignore functions with missing or empty names. These are actually
4915 illegal according to the DWARF standard. */
4918 complaint (&symfile_complaints,
4919 _("missing name for subprogram DIE at %d"), die->offset);
4923 /* Ignore functions with missing or invalid low and high pc attributes. */
4924 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
4926 attr = dwarf2_attr (die, DW_AT_external, cu);
4927 if (!attr || !DW_UNSND (attr))
4928 complaint (&symfile_complaints,
4929 _("cannot get low and high bounds for subprogram DIE at %d"),
4937 /* Record the function range for dwarf_decode_lines. */
4938 add_to_cu_func_list (name, lowpc, highpc, cu);
4940 new = push_context (0, lowpc);
4941 new->name = new_symbol (die, read_type_die (die, cu), cu);
4943 /* If there is a location expression for DW_AT_frame_base, record
4945 attr = dwarf2_attr (die, DW_AT_frame_base, cu);
4947 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
4948 expression is being recorded directly in the function's symbol
4949 and not in a separate frame-base object. I guess this hack is
4950 to avoid adding some sort of frame-base adjunct/annex to the
4951 function's symbol :-(. The problem with doing this is that it
4952 results in a function symbol with a location expression that
4953 has nothing to do with the location of the function, ouch! The
4954 relationship should be: a function's symbol has-a frame base; a
4955 frame-base has-a location expression. */
4956 dwarf2_symbol_mark_computed (attr, new->name, cu);
4958 cu->list_in_scope = &local_symbols;
4960 if (die->child != NULL)
4962 child_die = die->child;
4963 while (child_die && child_die->tag)
4965 process_die (child_die, cu);
4966 child_die = sibling_die (child_die);
4970 inherit_abstract_dies (die, cu);
4972 /* If we have a DW_AT_specification, we might need to import using
4973 directives from the context of the specification DIE. See the
4974 comment in determine_prefix. */
4975 if (cu->language == language_cplus
4976 && dwarf2_attr (die, DW_AT_specification, cu))
4978 struct dwarf2_cu *spec_cu = cu;
4979 struct die_info *spec_die = die_specification (die, &spec_cu);
4983 child_die = spec_die->child;
4984 while (child_die && child_die->tag)
4986 if (child_die->tag == DW_TAG_imported_module)
4987 process_die (child_die, spec_cu);
4988 child_die = sibling_die (child_die);
4991 /* In some cases, GCC generates specification DIEs that
4992 themselves contain DW_AT_specification attributes. */
4993 spec_die = die_specification (spec_die, &spec_cu);
4997 new = pop_context ();
4998 /* Make a block for the local symbols within. */
4999 block = finish_block (new->name, &local_symbols, new->old_blocks,
5000 lowpc, highpc, objfile);
5002 /* For C++, set the block's scope. */
5003 if (cu->language == language_cplus || cu->language == language_fortran)
5004 cp_set_block_scope (new->name, block, &objfile->objfile_obstack,
5005 determine_prefix (die, cu),
5006 processing_has_namespace_info);
5008 /* If we have address ranges, record them. */
5009 dwarf2_record_block_ranges (die, block, baseaddr, cu);
5011 /* In C++, we can have functions nested inside functions (e.g., when
5012 a function declares a class that has methods). This means that
5013 when we finish processing a function scope, we may need to go
5014 back to building a containing block's symbol lists. */
5015 local_symbols = new->locals;
5016 param_symbols = new->params;
5017 using_directives = new->using_directives;
5019 /* If we've finished processing a top-level function, subsequent
5020 symbols go in the file symbol list. */
5021 if (outermost_context_p ())
5022 cu->list_in_scope = &file_symbols;
5025 /* Process all the DIES contained within a lexical block scope. Start
5026 a new scope, process the dies, and then close the scope. */
5029 read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
5031 struct objfile *objfile = cu->objfile;
5032 struct context_stack *new;
5033 CORE_ADDR lowpc, highpc;
5034 struct die_info *child_die;
5037 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5039 /* Ignore blocks with missing or invalid low and high pc attributes. */
5040 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
5041 as multiple lexical blocks? Handling children in a sane way would
5042 be nasty. Might be easier to properly extend generic blocks to
5044 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
5049 push_context (0, lowpc);
5050 if (die->child != NULL)
5052 child_die = die->child;
5053 while (child_die && child_die->tag)
5055 process_die (child_die, cu);
5056 child_die = sibling_die (child_die);
5059 new = pop_context ();
5061 if (local_symbols != NULL || using_directives != NULL)
5064 = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
5067 /* Note that recording ranges after traversing children, as we
5068 do here, means that recording a parent's ranges entails
5069 walking across all its children's ranges as they appear in
5070 the address map, which is quadratic behavior.
5072 It would be nicer to record the parent's ranges before
5073 traversing its children, simply overriding whatever you find
5074 there. But since we don't even decide whether to create a
5075 block until after we've traversed its children, that's hard
5077 dwarf2_record_block_ranges (die, block, baseaddr, cu);
5079 local_symbols = new->locals;
5080 using_directives = new->using_directives;
5083 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
5084 Return 1 if the attributes are present and valid, otherwise, return 0.
5085 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
5088 dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
5089 CORE_ADDR *high_return, struct dwarf2_cu *cu,
5090 struct partial_symtab *ranges_pst)
5092 struct objfile *objfile = cu->objfile;
5093 struct comp_unit_head *cu_header = &cu->header;
5094 bfd *obfd = objfile->obfd;
5095 unsigned int addr_size = cu_header->addr_size;
5096 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
5097 /* Base address selection entry. */
5108 found_base = cu->base_known;
5109 base = cu->base_address;
5111 dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
5112 if (offset >= dwarf2_per_objfile->ranges.size)
5114 complaint (&symfile_complaints,
5115 _("Offset %d out of bounds for DW_AT_ranges attribute"),
5119 buffer = dwarf2_per_objfile->ranges.buffer + offset;
5121 /* Read in the largest possible address. */
5122 marker = read_address (obfd, buffer, cu, &dummy);
5123 if ((marker & mask) == mask)
5125 /* If we found the largest possible address, then
5126 read the base address. */
5127 base = read_address (obfd, buffer + addr_size, cu, &dummy);
5128 buffer += 2 * addr_size;
5129 offset += 2 * addr_size;
5135 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5139 CORE_ADDR range_beginning, range_end;
5141 range_beginning = read_address (obfd, buffer, cu, &dummy);
5142 buffer += addr_size;
5143 range_end = read_address (obfd, buffer, cu, &dummy);
5144 buffer += addr_size;
5145 offset += 2 * addr_size;
5147 /* An end of list marker is a pair of zero addresses. */
5148 if (range_beginning == 0 && range_end == 0)
5149 /* Found the end of list entry. */
5152 /* Each base address selection entry is a pair of 2 values.
5153 The first is the largest possible address, the second is
5154 the base address. Check for a base address here. */
5155 if ((range_beginning & mask) == mask)
5157 /* If we found the largest possible address, then
5158 read the base address. */
5159 base = read_address (obfd, buffer + addr_size, cu, &dummy);
5166 /* We have no valid base address for the ranges
5168 complaint (&symfile_complaints,
5169 _("Invalid .debug_ranges data (no base address)"));
5173 range_beginning += base;
5176 if (ranges_pst != NULL && range_beginning < range_end)
5177 addrmap_set_empty (objfile->psymtabs_addrmap,
5178 range_beginning + baseaddr, range_end - 1 + baseaddr,
5181 /* FIXME: This is recording everything as a low-high
5182 segment of consecutive addresses. We should have a
5183 data structure for discontiguous block ranges
5187 low = range_beginning;
5193 if (range_beginning < low)
5194 low = range_beginning;
5195 if (range_end > high)
5201 /* If the first entry is an end-of-list marker, the range
5202 describes an empty scope, i.e. no instructions. */
5208 *high_return = high;
5212 /* Get low and high pc attributes from a die. Return 1 if the attributes
5213 are present and valid, otherwise, return 0. Return -1 if the range is
5214 discontinuous, i.e. derived from DW_AT_ranges information. */
5216 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
5217 CORE_ADDR *highpc, struct dwarf2_cu *cu,
5218 struct partial_symtab *pst)
5220 struct attribute *attr;
5225 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
5228 high = DW_ADDR (attr);
5229 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
5231 low = DW_ADDR (attr);
5233 /* Found high w/o low attribute. */
5236 /* Found consecutive range of addresses. */
5241 attr = dwarf2_attr (die, DW_AT_ranges, cu);
5244 /* Value of the DW_AT_ranges attribute is the offset in the
5245 .debug_ranges section. */
5246 if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu, pst))
5248 /* Found discontinuous range of addresses. */
5256 /* When using the GNU linker, .gnu.linkonce. sections are used to
5257 eliminate duplicate copies of functions and vtables and such.
5258 The linker will arbitrarily choose one and discard the others.
5259 The AT_*_pc values for such functions refer to local labels in
5260 these sections. If the section from that file was discarded, the
5261 labels are not in the output, so the relocs get a value of 0.
5262 If this is a discarded function, mark the pc bounds as invalid,
5263 so that GDB will ignore it. */
5264 if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
5272 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
5273 its low and high PC addresses. Do nothing if these addresses could not
5274 be determined. Otherwise, set LOWPC to the low address if it is smaller,
5275 and HIGHPC to the high address if greater than HIGHPC. */
5278 dwarf2_get_subprogram_pc_bounds (struct die_info *die,
5279 CORE_ADDR *lowpc, CORE_ADDR *highpc,
5280 struct dwarf2_cu *cu)
5282 CORE_ADDR low, high;
5283 struct die_info *child = die->child;
5285 if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL))
5287 *lowpc = min (*lowpc, low);
5288 *highpc = max (*highpc, high);
5291 /* If the language does not allow nested subprograms (either inside
5292 subprograms or lexical blocks), we're done. */
5293 if (cu->language != language_ada)
5296 /* Check all the children of the given DIE. If it contains nested
5297 subprograms, then check their pc bounds. Likewise, we need to
5298 check lexical blocks as well, as they may also contain subprogram
5300 while (child && child->tag)
5302 if (child->tag == DW_TAG_subprogram
5303 || child->tag == DW_TAG_lexical_block)
5304 dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu);
5305 child = sibling_die (child);
5309 /* Get the low and high pc's represented by the scope DIE, and store
5310 them in *LOWPC and *HIGHPC. If the correct values can't be
5311 determined, set *LOWPC to -1 and *HIGHPC to 0. */
5314 get_scope_pc_bounds (struct die_info *die,
5315 CORE_ADDR *lowpc, CORE_ADDR *highpc,
5316 struct dwarf2_cu *cu)
5318 CORE_ADDR best_low = (CORE_ADDR) -1;
5319 CORE_ADDR best_high = (CORE_ADDR) 0;
5320 CORE_ADDR current_low, current_high;
5322 if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL))
5324 best_low = current_low;
5325 best_high = current_high;
5329 struct die_info *child = die->child;
5331 while (child && child->tag)
5333 switch (child->tag) {
5334 case DW_TAG_subprogram:
5335 dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu);
5337 case DW_TAG_namespace:
5339 /* FIXME: carlton/2004-01-16: Should we do this for
5340 DW_TAG_class_type/DW_TAG_structure_type, too? I think
5341 that current GCC's always emit the DIEs corresponding
5342 to definitions of methods of classes as children of a
5343 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
5344 the DIEs giving the declarations, which could be
5345 anywhere). But I don't see any reason why the
5346 standards says that they have to be there. */
5347 get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
5349 if (current_low != ((CORE_ADDR) -1))
5351 best_low = min (best_low, current_low);
5352 best_high = max (best_high, current_high);
5360 child = sibling_die (child);
5365 *highpc = best_high;
5368 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
5371 dwarf2_record_block_ranges (struct die_info *die, struct block *block,
5372 CORE_ADDR baseaddr, struct dwarf2_cu *cu)
5374 struct attribute *attr;
5376 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
5379 CORE_ADDR high = DW_ADDR (attr);
5381 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
5384 CORE_ADDR low = DW_ADDR (attr);
5386 record_block_range (block, baseaddr + low, baseaddr + high - 1);
5390 attr = dwarf2_attr (die, DW_AT_ranges, cu);
5393 bfd *obfd = cu->objfile->obfd;
5395 /* The value of the DW_AT_ranges attribute is the offset of the
5396 address range list in the .debug_ranges section. */
5397 unsigned long offset = DW_UNSND (attr);
5398 gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset;
5400 /* For some target architectures, but not others, the
5401 read_address function sign-extends the addresses it returns.
5402 To recognize base address selection entries, we need a
5404 unsigned int addr_size = cu->header.addr_size;
5405 CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
5407 /* The base address, to which the next pair is relative. Note
5408 that this 'base' is a DWARF concept: most entries in a range
5409 list are relative, to reduce the number of relocs against the
5410 debugging information. This is separate from this function's
5411 'baseaddr' argument, which GDB uses to relocate debugging
5412 information from a shared library based on the address at
5413 which the library was loaded. */
5414 CORE_ADDR base = cu->base_address;
5415 int base_known = cu->base_known;
5417 gdb_assert (dwarf2_per_objfile->ranges.readin);
5418 if (offset >= dwarf2_per_objfile->ranges.size)
5420 complaint (&symfile_complaints,
5421 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
5428 unsigned int bytes_read;
5429 CORE_ADDR start, end;
5431 start = read_address (obfd, buffer, cu, &bytes_read);
5432 buffer += bytes_read;
5433 end = read_address (obfd, buffer, cu, &bytes_read);
5434 buffer += bytes_read;
5436 /* Did we find the end of the range list? */
5437 if (start == 0 && end == 0)
5440 /* Did we find a base address selection entry? */
5441 else if ((start & base_select_mask) == base_select_mask)
5447 /* We found an ordinary address range. */
5452 complaint (&symfile_complaints,
5453 _("Invalid .debug_ranges data (no base address)"));
5457 record_block_range (block,
5458 baseaddr + base + start,
5459 baseaddr + base + end - 1);
5465 /* Add an aggregate field to the field list. */
5468 dwarf2_add_field (struct field_info *fip, struct die_info *die,
5469 struct dwarf2_cu *cu)
5471 struct objfile *objfile = cu->objfile;
5472 struct gdbarch *gdbarch = get_objfile_arch (objfile);
5473 struct nextfield *new_field;
5474 struct attribute *attr;
5476 char *fieldname = "";
5478 /* Allocate a new field list entry and link it in. */
5479 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
5480 make_cleanup (xfree, new_field);
5481 memset (new_field, 0, sizeof (struct nextfield));
5483 if (die->tag == DW_TAG_inheritance)
5485 new_field->next = fip->baseclasses;
5486 fip->baseclasses = new_field;
5490 new_field->next = fip->fields;
5491 fip->fields = new_field;
5495 /* Handle accessibility and virtuality of field.
5496 The default accessibility for members is public, the default
5497 accessibility for inheritance is private. */
5498 if (die->tag != DW_TAG_inheritance)
5499 new_field->accessibility = DW_ACCESS_public;
5501 new_field->accessibility = DW_ACCESS_private;
5502 new_field->virtuality = DW_VIRTUALITY_none;
5504 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
5506 new_field->accessibility = DW_UNSND (attr);
5507 if (new_field->accessibility != DW_ACCESS_public)
5508 fip->non_public_fields = 1;
5509 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
5511 new_field->virtuality = DW_UNSND (attr);
5513 fp = &new_field->field;
5515 if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
5517 /* Data member other than a C++ static data member. */
5519 /* Get type of field. */
5520 fp->type = die_type (die, cu);
5522 SET_FIELD_BITPOS (*fp, 0);
5524 /* Get bit size of field (zero if none). */
5525 attr = dwarf2_attr (die, DW_AT_bit_size, cu);
5528 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
5532 FIELD_BITSIZE (*fp) = 0;
5535 /* Get bit offset of field. */
5536 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
5539 int byte_offset = 0;
5541 if (attr_form_is_section_offset (attr))
5542 dwarf2_complex_location_expr_complaint ();
5543 else if (attr_form_is_constant (attr))
5544 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
5545 else if (attr_form_is_block (attr))
5546 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
5548 dwarf2_complex_location_expr_complaint ();
5550 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
5552 attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
5555 if (gdbarch_bits_big_endian (gdbarch))
5557 /* For big endian bits, the DW_AT_bit_offset gives the
5558 additional bit offset from the MSB of the containing
5559 anonymous object to the MSB of the field. We don't
5560 have to do anything special since we don't need to
5561 know the size of the anonymous object. */
5562 FIELD_BITPOS (*fp) += DW_UNSND (attr);
5566 /* For little endian bits, compute the bit offset to the
5567 MSB of the anonymous object, subtract off the number of
5568 bits from the MSB of the field to the MSB of the
5569 object, and then subtract off the number of bits of
5570 the field itself. The result is the bit offset of
5571 the LSB of the field. */
5573 int bit_offset = DW_UNSND (attr);
5575 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5578 /* The size of the anonymous object containing
5579 the bit field is explicit, so use the
5580 indicated size (in bytes). */
5581 anonymous_size = DW_UNSND (attr);
5585 /* The size of the anonymous object containing
5586 the bit field must be inferred from the type
5587 attribute of the data member containing the
5589 anonymous_size = TYPE_LENGTH (fp->type);
5591 FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
5592 - bit_offset - FIELD_BITSIZE (*fp);
5596 /* Get name of field. */
5597 fieldname = dwarf2_name (die, cu);
5598 if (fieldname == NULL)
5601 /* The name is already allocated along with this objfile, so we don't
5602 need to duplicate it for the type. */
5603 fp->name = fieldname;
5605 /* Change accessibility for artificial fields (e.g. virtual table
5606 pointer or virtual base class pointer) to private. */
5607 if (dwarf2_attr (die, DW_AT_artificial, cu))
5609 FIELD_ARTIFICIAL (*fp) = 1;
5610 new_field->accessibility = DW_ACCESS_private;
5611 fip->non_public_fields = 1;
5614 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
5616 /* C++ static member. */
5618 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
5619 is a declaration, but all versions of G++ as of this writing
5620 (so through at least 3.2.1) incorrectly generate
5621 DW_TAG_variable tags. */
5625 /* Get name of field. */
5626 fieldname = dwarf2_name (die, cu);
5627 if (fieldname == NULL)
5630 attr = dwarf2_attr (die, DW_AT_const_value, cu);
5632 /* Only create a symbol if this is an external value.
5633 new_symbol checks this and puts the value in the global symbol
5634 table, which we want. If it is not external, new_symbol
5635 will try to put the value in cu->list_in_scope which is wrong. */
5636 && dwarf2_flag_true_p (die, DW_AT_external, cu))
5638 /* A static const member, not much different than an enum as far as
5639 we're concerned, except that we can support more types. */
5640 new_symbol (die, NULL, cu);
5643 /* Get physical name. */
5644 physname = (char *) dwarf2_physname (fieldname, die, cu);
5646 /* The name is already allocated along with this objfile, so we don't
5647 need to duplicate it for the type. */
5648 SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
5649 FIELD_TYPE (*fp) = die_type (die, cu);
5650 FIELD_NAME (*fp) = fieldname;
5652 else if (die->tag == DW_TAG_inheritance)
5654 /* C++ base class field. */
5655 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
5658 int byte_offset = 0;
5660 if (attr_form_is_section_offset (attr))
5661 dwarf2_complex_location_expr_complaint ();
5662 else if (attr_form_is_constant (attr))
5663 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
5664 else if (attr_form_is_block (attr))
5665 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
5667 dwarf2_complex_location_expr_complaint ();
5669 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
5671 FIELD_BITSIZE (*fp) = 0;
5672 FIELD_TYPE (*fp) = die_type (die, cu);
5673 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
5674 fip->nbaseclasses++;
5678 /* Add a typedef defined in the scope of the FIP's class. */
5681 dwarf2_add_typedef (struct field_info *fip, struct die_info *die,
5682 struct dwarf2_cu *cu)
5684 struct objfile *objfile = cu->objfile;
5685 struct gdbarch *gdbarch = get_objfile_arch (objfile);
5686 struct typedef_field_list *new_field;
5687 struct attribute *attr;
5688 struct typedef_field *fp;
5689 char *fieldname = "";
5691 /* Allocate a new field list entry and link it in. */
5692 new_field = xzalloc (sizeof (*new_field));
5693 make_cleanup (xfree, new_field);
5695 gdb_assert (die->tag == DW_TAG_typedef);
5697 fp = &new_field->field;
5699 /* Get name of field. */
5700 fp->name = dwarf2_name (die, cu);
5701 if (fp->name == NULL)
5704 fp->type = read_type_die (die, cu);
5706 new_field->next = fip->typedef_field_list;
5707 fip->typedef_field_list = new_field;
5708 fip->typedef_field_list_count++;
5711 /* Create the vector of fields, and attach it to the type. */
5714 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
5715 struct dwarf2_cu *cu)
5717 int nfields = fip->nfields;
5719 /* Record the field count, allocate space for the array of fields,
5720 and create blank accessibility bitfields if necessary. */
5721 TYPE_NFIELDS (type) = nfields;
5722 TYPE_FIELDS (type) = (struct field *)
5723 TYPE_ALLOC (type, sizeof (struct field) * nfields);
5724 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
5726 if (fip->non_public_fields && cu->language != language_ada)
5728 ALLOCATE_CPLUS_STRUCT_TYPE (type);
5730 TYPE_FIELD_PRIVATE_BITS (type) =
5731 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
5732 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
5734 TYPE_FIELD_PROTECTED_BITS (type) =
5735 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
5736 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
5738 TYPE_FIELD_IGNORE_BITS (type) =
5739 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
5740 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
5743 /* If the type has baseclasses, allocate and clear a bit vector for
5744 TYPE_FIELD_VIRTUAL_BITS. */
5745 if (fip->nbaseclasses && cu->language != language_ada)
5747 int num_bytes = B_BYTES (fip->nbaseclasses);
5748 unsigned char *pointer;
5750 ALLOCATE_CPLUS_STRUCT_TYPE (type);
5751 pointer = TYPE_ALLOC (type, num_bytes);
5752 TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
5753 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
5754 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
5757 /* Copy the saved-up fields into the field vector. Start from the head
5758 of the list, adding to the tail of the field array, so that they end
5759 up in the same order in the array in which they were added to the list. */
5760 while (nfields-- > 0)
5762 struct nextfield *fieldp;
5766 fieldp = fip->fields;
5767 fip->fields = fieldp->next;
5771 fieldp = fip->baseclasses;
5772 fip->baseclasses = fieldp->next;
5775 TYPE_FIELD (type, nfields) = fieldp->field;
5776 switch (fieldp->accessibility)
5778 case DW_ACCESS_private:
5779 if (cu->language != language_ada)
5780 SET_TYPE_FIELD_PRIVATE (type, nfields);
5783 case DW_ACCESS_protected:
5784 if (cu->language != language_ada)
5785 SET_TYPE_FIELD_PROTECTED (type, nfields);
5788 case DW_ACCESS_public:
5792 /* Unknown accessibility. Complain and treat it as public. */
5794 complaint (&symfile_complaints, _("unsupported accessibility %d"),
5795 fieldp->accessibility);
5799 if (nfields < fip->nbaseclasses)
5801 switch (fieldp->virtuality)
5803 case DW_VIRTUALITY_virtual:
5804 case DW_VIRTUALITY_pure_virtual:
5805 if (cu->language == language_ada)
5806 error ("unexpected virtuality in component of Ada type");
5807 SET_TYPE_FIELD_VIRTUAL (type, nfields);
5814 /* Add a member function to the proper fieldlist. */
5817 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
5818 struct type *type, struct dwarf2_cu *cu)
5820 struct objfile *objfile = cu->objfile;
5821 struct attribute *attr;
5822 struct fnfieldlist *flp;
5824 struct fn_field *fnp;
5827 struct nextfnfield *new_fnfield;
5828 struct type *this_type;
5830 if (cu->language == language_ada)
5831 error ("unexpected member function in Ada type");
5833 /* Get name of member function. */
5834 fieldname = dwarf2_name (die, cu);
5835 if (fieldname == NULL)
5838 /* Get the mangled name. */
5839 physname = (char *) dwarf2_physname (fieldname, die, cu);
5841 /* Look up member function name in fieldlist. */
5842 for (i = 0; i < fip->nfnfields; i++)
5844 if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
5848 /* Create new list element if necessary. */
5849 if (i < fip->nfnfields)
5850 flp = &fip->fnfieldlists[i];
5853 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
5855 fip->fnfieldlists = (struct fnfieldlist *)
5856 xrealloc (fip->fnfieldlists,
5857 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
5858 * sizeof (struct fnfieldlist));
5859 if (fip->nfnfields == 0)
5860 make_cleanup (free_current_contents, &fip->fnfieldlists);
5862 flp = &fip->fnfieldlists[fip->nfnfields];
5863 flp->name = fieldname;
5869 /* Create a new member function field and chain it to the field list
5871 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
5872 make_cleanup (xfree, new_fnfield);
5873 memset (new_fnfield, 0, sizeof (struct nextfnfield));
5874 new_fnfield->next = flp->head;
5875 flp->head = new_fnfield;
5878 /* Fill in the member function field info. */
5879 fnp = &new_fnfield->fnfield;
5880 /* The name is already allocated along with this objfile, so we don't
5881 need to duplicate it for the type. */
5882 fnp->physname = physname ? physname : "";
5883 fnp->type = alloc_type (objfile);
5884 this_type = read_type_die (die, cu);
5885 if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC)
5887 int nparams = TYPE_NFIELDS (this_type);
5889 /* TYPE is the domain of this method, and THIS_TYPE is the type
5890 of the method itself (TYPE_CODE_METHOD). */
5891 smash_to_method_type (fnp->type, type,
5892 TYPE_TARGET_TYPE (this_type),
5893 TYPE_FIELDS (this_type),
5894 TYPE_NFIELDS (this_type),
5895 TYPE_VARARGS (this_type));
5897 /* Handle static member functions.
5898 Dwarf2 has no clean way to discern C++ static and non-static
5899 member functions. G++ helps GDB by marking the first
5900 parameter for non-static member functions (which is the
5901 this pointer) as artificial. We obtain this information
5902 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
5903 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0)
5904 fnp->voffset = VOFFSET_STATIC;
5907 complaint (&symfile_complaints, _("member function type missing for '%s'"),
5910 /* Get fcontext from DW_AT_containing_type if present. */
5911 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
5912 fnp->fcontext = die_containing_type (die, cu);
5914 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
5915 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
5917 /* Get accessibility. */
5918 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
5921 switch (DW_UNSND (attr))
5923 case DW_ACCESS_private:
5924 fnp->is_private = 1;
5926 case DW_ACCESS_protected:
5927 fnp->is_protected = 1;
5932 /* Check for artificial methods. */
5933 attr = dwarf2_attr (die, DW_AT_artificial, cu);
5934 if (attr && DW_UNSND (attr) != 0)
5935 fnp->is_artificial = 1;
5937 /* Get index in virtual function table if it is a virtual member
5938 function. For older versions of GCC, this is an offset in the
5939 appropriate virtual table, as specified by DW_AT_containing_type.
5940 For everyone else, it is an expression to be evaluated relative
5941 to the object address. */
5943 attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
5946 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0)
5948 if (DW_BLOCK (attr)->data[0] == DW_OP_constu)
5950 /* Old-style GCC. */
5951 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
5953 else if (DW_BLOCK (attr)->data[0] == DW_OP_deref
5954 || (DW_BLOCK (attr)->size > 1
5955 && DW_BLOCK (attr)->data[0] == DW_OP_deref_size
5956 && DW_BLOCK (attr)->data[1] == cu->header.addr_size))
5958 struct dwarf_block blk;
5961 offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref
5963 blk.size = DW_BLOCK (attr)->size - offset;
5964 blk.data = DW_BLOCK (attr)->data + offset;
5965 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu);
5966 if ((fnp->voffset % cu->header.addr_size) != 0)
5967 dwarf2_complex_location_expr_complaint ();
5969 fnp->voffset /= cu->header.addr_size;
5973 dwarf2_complex_location_expr_complaint ();
5976 fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0));
5978 else if (attr_form_is_section_offset (attr))
5980 dwarf2_complex_location_expr_complaint ();
5984 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
5990 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
5991 if (attr && DW_UNSND (attr))
5993 /* GCC does this, as of 2008-08-25; PR debug/37237. */
5994 complaint (&symfile_complaints,
5995 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
5996 fieldname, die->offset);
5997 ALLOCATE_CPLUS_STRUCT_TYPE (type);
5998 TYPE_CPLUS_DYNAMIC (type) = 1;
6003 /* Create the vector of member function fields, and attach it to the type. */
6006 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
6007 struct dwarf2_cu *cu)
6009 struct fnfieldlist *flp;
6010 int total_length = 0;
6013 if (cu->language == language_ada)
6014 error ("unexpected member functions in Ada type");
6016 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6017 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
6018 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
6020 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
6022 struct nextfnfield *nfp = flp->head;
6023 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
6026 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
6027 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
6028 fn_flp->fn_fields = (struct fn_field *)
6029 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
6030 for (k = flp->length; (k--, nfp); nfp = nfp->next)
6031 fn_flp->fn_fields[k] = nfp->fnfield;
6033 total_length += flp->length;
6036 TYPE_NFN_FIELDS (type) = fip->nfnfields;
6037 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
6040 /* Returns non-zero if NAME is the name of a vtable member in CU's
6041 language, zero otherwise. */
6043 is_vtable_name (const char *name, struct dwarf2_cu *cu)
6045 static const char vptr[] = "_vptr";
6046 static const char vtable[] = "vtable";
6048 /* Look for the C++ and Java forms of the vtable. */
6049 if ((cu->language == language_java
6050 && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
6051 || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
6052 && is_cplus_marker (name[sizeof (vptr) - 1])))
6058 /* GCC outputs unnamed structures that are really pointers to member
6059 functions, with the ABI-specified layout. If TYPE describes
6060 such a structure, smash it into a member function type.
6062 GCC shouldn't do this; it should just output pointer to member DIEs.
6063 This is GCC PR debug/28767. */
6066 quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile)
6068 struct type *pfn_type, *domain_type, *new_type;
6070 /* Check for a structure with no name and two children. */
6071 if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2)
6074 /* Check for __pfn and __delta members. */
6075 if (TYPE_FIELD_NAME (type, 0) == NULL
6076 || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0
6077 || TYPE_FIELD_NAME (type, 1) == NULL
6078 || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0)
6081 /* Find the type of the method. */
6082 pfn_type = TYPE_FIELD_TYPE (type, 0);
6083 if (pfn_type == NULL
6084 || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
6085 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
6088 /* Look for the "this" argument. */
6089 pfn_type = TYPE_TARGET_TYPE (pfn_type);
6090 if (TYPE_NFIELDS (pfn_type) == 0
6091 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
6092 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
6095 domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
6096 new_type = alloc_type (objfile);
6097 smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type),
6098 TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
6099 TYPE_VARARGS (pfn_type));
6100 smash_to_methodptr_type (type, new_type);
6103 /* Called when we find the DIE that starts a structure or union scope
6104 (definition) to process all dies that define the members of the
6107 NOTE: we need to call struct_type regardless of whether or not the
6108 DIE has an at_name attribute, since it might be an anonymous
6109 structure or union. This gets the type entered into our set of
6112 However, if the structure is incomplete (an opaque struct/union)
6113 then suppress creating a symbol table entry for it since gdb only
6114 wants to find the one with the complete definition. Note that if
6115 it is complete, we just call new_symbol, which does it's own
6116 checking about whether the struct/union is anonymous or not (and
6117 suppresses creating a symbol table entry itself). */
6119 static struct type *
6120 read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
6122 struct objfile *objfile = cu->objfile;
6124 struct attribute *attr;
6126 struct cleanup *back_to;
6128 /* If the definition of this type lives in .debug_types, read that type.
6129 Don't follow DW_AT_specification though, that will take us back up
6130 the chain and we want to go down. */
6131 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
6134 struct dwarf2_cu *type_cu = cu;
6135 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
6137 /* We could just recurse on read_structure_type, but we need to call
6138 get_die_type to ensure only one type for this DIE is created.
6139 This is important, for example, because for c++ classes we need
6140 TYPE_NAME set which is only done by new_symbol. Blech. */
6141 type = read_type_die (type_die, type_cu);
6142 return set_die_type (die, type, cu);
6145 back_to = make_cleanup (null_cleanup, 0);
6147 type = alloc_type (objfile);
6148 INIT_CPLUS_SPECIFIC (type);
6150 name = dwarf2_name (die, cu);
6153 if (cu->language == language_cplus
6154 || cu->language == language_java)
6156 TYPE_TAG_NAME (type) = (char *) dwarf2_full_name (name, die, cu);
6157 if (die->tag == DW_TAG_structure_type
6158 || die->tag == DW_TAG_class_type)
6159 TYPE_NAME (type) = TYPE_TAG_NAME (type);
6163 /* The name is already allocated along with this objfile, so
6164 we don't need to duplicate it for the type. */
6165 TYPE_TAG_NAME (type) = (char *) name;
6166 if (die->tag == DW_TAG_class_type)
6167 TYPE_NAME (type) = TYPE_TAG_NAME (type);
6171 if (die->tag == DW_TAG_structure_type)
6173 TYPE_CODE (type) = TYPE_CODE_STRUCT;
6175 else if (die->tag == DW_TAG_union_type)
6177 TYPE_CODE (type) = TYPE_CODE_UNION;
6181 TYPE_CODE (type) = TYPE_CODE_CLASS;
6184 if (cu->language == language_cplus && die->tag == DW_TAG_class_type)
6185 TYPE_DECLARED_CLASS (type) = 1;
6187 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6190 TYPE_LENGTH (type) = DW_UNSND (attr);
6194 TYPE_LENGTH (type) = 0;
6197 TYPE_STUB_SUPPORTED (type) = 1;
6198 if (die_is_declaration (die, cu))
6199 TYPE_STUB (type) = 1;
6200 else if (attr == NULL && die->child == NULL
6201 && producer_is_realview (cu->producer))
6202 /* RealView does not output the required DW_AT_declaration
6203 on incomplete types. */
6204 TYPE_STUB (type) = 1;
6206 /* We need to add the type field to the die immediately so we don't
6207 infinitely recurse when dealing with pointers to the structure
6208 type within the structure itself. */
6209 set_die_type (die, type, cu);
6211 /* set_die_type should be already done. */
6212 set_descriptive_type (type, die, cu);
6214 if (die->child != NULL && ! die_is_declaration (die, cu))
6216 struct field_info fi;
6217 struct die_info *child_die;
6219 memset (&fi, 0, sizeof (struct field_info));
6221 child_die = die->child;
6223 while (child_die && child_die->tag)
6225 if (child_die->tag == DW_TAG_member
6226 || child_die->tag == DW_TAG_variable)
6228 /* NOTE: carlton/2002-11-05: A C++ static data member
6229 should be a DW_TAG_member that is a declaration, but
6230 all versions of G++ as of this writing (so through at
6231 least 3.2.1) incorrectly generate DW_TAG_variable
6232 tags for them instead. */
6233 dwarf2_add_field (&fi, child_die, cu);
6235 else if (child_die->tag == DW_TAG_subprogram)
6237 /* C++ member function. */
6238 dwarf2_add_member_fn (&fi, child_die, type, cu);
6240 else if (child_die->tag == DW_TAG_inheritance)
6242 /* C++ base class field. */
6243 dwarf2_add_field (&fi, child_die, cu);
6245 else if (child_die->tag == DW_TAG_typedef)
6246 dwarf2_add_typedef (&fi, child_die, cu);
6247 child_die = sibling_die (child_die);
6250 /* Attach fields and member functions to the type. */
6252 dwarf2_attach_fields_to_type (&fi, type, cu);
6255 dwarf2_attach_fn_fields_to_type (&fi, type, cu);
6257 /* Get the type which refers to the base class (possibly this
6258 class itself) which contains the vtable pointer for the current
6259 class from the DW_AT_containing_type attribute. This use of
6260 DW_AT_containing_type is a GNU extension. */
6262 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
6264 struct type *t = die_containing_type (die, cu);
6266 TYPE_VPTR_BASETYPE (type) = t;
6271 /* Our own class provides vtbl ptr. */
6272 for (i = TYPE_NFIELDS (t) - 1;
6273 i >= TYPE_N_BASECLASSES (t);
6276 char *fieldname = TYPE_FIELD_NAME (t, i);
6278 if (is_vtable_name (fieldname, cu))
6280 TYPE_VPTR_FIELDNO (type) = i;
6285 /* Complain if virtual function table field not found. */
6286 if (i < TYPE_N_BASECLASSES (t))
6287 complaint (&symfile_complaints,
6288 _("virtual function table pointer not found when defining class '%s'"),
6289 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
6294 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
6297 else if (cu->producer
6298 && strncmp (cu->producer,
6299 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
6301 /* The IBM XLC compiler does not provide direct indication
6302 of the containing type, but the vtable pointer is
6303 always named __vfp. */
6307 for (i = TYPE_NFIELDS (type) - 1;
6308 i >= TYPE_N_BASECLASSES (type);
6311 if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
6313 TYPE_VPTR_FIELDNO (type) = i;
6314 TYPE_VPTR_BASETYPE (type) = type;
6321 /* Copy fi.typedef_field_list linked list elements content into the
6322 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
6323 if (fi.typedef_field_list)
6325 int i = fi.typedef_field_list_count;
6327 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6328 TYPE_TYPEDEF_FIELD_ARRAY (type)
6329 = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i);
6330 TYPE_TYPEDEF_FIELD_COUNT (type) = i;
6332 /* Reverse the list order to keep the debug info elements order. */
6335 struct typedef_field *dest, *src;
6337 dest = &TYPE_TYPEDEF_FIELD (type, i);
6338 src = &fi.typedef_field_list->field;
6339 fi.typedef_field_list = fi.typedef_field_list->next;
6345 quirk_gcc_member_function_pointer (type, cu->objfile);
6347 do_cleanups (back_to);
6352 process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
6354 struct die_info *child_die = die->child;
6355 struct type *this_type;
6357 this_type = get_die_type (die, cu);
6358 if (this_type == NULL)
6359 this_type = read_structure_type (die, cu);
6361 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
6362 snapshots) has been known to create a die giving a declaration
6363 for a class that has, as a child, a die giving a definition for a
6364 nested class. So we have to process our children even if the
6365 current die is a declaration. Normally, of course, a declaration
6366 won't have any children at all. */
6368 while (child_die != NULL && child_die->tag)
6370 if (child_die->tag == DW_TAG_member
6371 || child_die->tag == DW_TAG_variable
6372 || child_die->tag == DW_TAG_inheritance)
6377 process_die (child_die, cu);
6379 child_die = sibling_die (child_die);
6382 /* Do not consider external references. According to the DWARF standard,
6383 these DIEs are identified by the fact that they have no byte_size
6384 attribute, and a declaration attribute. */
6385 if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
6386 || !die_is_declaration (die, cu))
6387 new_symbol (die, this_type, cu);
6390 /* Given a DW_AT_enumeration_type die, set its type. We do not
6391 complete the type's fields yet, or create any symbols. */
6393 static struct type *
6394 read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
6396 struct objfile *objfile = cu->objfile;
6398 struct attribute *attr;
6401 /* If the definition of this type lives in .debug_types, read that type.
6402 Don't follow DW_AT_specification though, that will take us back up
6403 the chain and we want to go down. */
6404 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
6407 struct dwarf2_cu *type_cu = cu;
6408 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
6410 type = read_type_die (type_die, type_cu);
6411 return set_die_type (die, type, cu);
6414 type = alloc_type (objfile);
6416 TYPE_CODE (type) = TYPE_CODE_ENUM;
6417 name = dwarf2_full_name (NULL, die, cu);
6419 TYPE_TAG_NAME (type) = (char *) name;
6421 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6424 TYPE_LENGTH (type) = DW_UNSND (attr);
6428 TYPE_LENGTH (type) = 0;
6431 /* The enumeration DIE can be incomplete. In Ada, any type can be
6432 declared as private in the package spec, and then defined only
6433 inside the package body. Such types are known as Taft Amendment
6434 Types. When another package uses such a type, an incomplete DIE
6435 may be generated by the compiler. */
6436 if (die_is_declaration (die, cu))
6437 TYPE_STUB (type) = 1;
6439 return set_die_type (die, type, cu);
6442 /* Given a pointer to a die which begins an enumeration, process all
6443 the dies that define the members of the enumeration, and create the
6444 symbol for the enumeration type.
6446 NOTE: We reverse the order of the element list. */
6449 process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
6451 struct die_info *child_die;
6452 struct field *fields;
6455 int unsigned_enum = 1;
6457 struct type *this_type;
6461 this_type = get_die_type (die, cu);
6462 if (this_type == NULL)
6463 this_type = read_enumeration_type (die, cu);
6464 if (die->child != NULL)
6466 child_die = die->child;
6467 while (child_die && child_die->tag)
6469 if (child_die->tag != DW_TAG_enumerator)
6471 process_die (child_die, cu);
6475 name = dwarf2_name (child_die, cu);
6478 sym = new_symbol (child_die, this_type, cu);
6479 if (SYMBOL_VALUE (sym) < 0)
6482 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
6484 fields = (struct field *)
6486 (num_fields + DW_FIELD_ALLOC_CHUNK)
6487 * sizeof (struct field));
6490 FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym);
6491 FIELD_TYPE (fields[num_fields]) = NULL;
6492 SET_FIELD_BITPOS (fields[num_fields], SYMBOL_VALUE (sym));
6493 FIELD_BITSIZE (fields[num_fields]) = 0;
6499 child_die = sibling_die (child_die);
6504 TYPE_NFIELDS (this_type) = num_fields;
6505 TYPE_FIELDS (this_type) = (struct field *)
6506 TYPE_ALLOC (this_type, sizeof (struct field) * num_fields);
6507 memcpy (TYPE_FIELDS (this_type), fields,
6508 sizeof (struct field) * num_fields);
6512 TYPE_UNSIGNED (this_type) = 1;
6515 new_symbol (die, this_type, cu);
6518 /* Extract all information from a DW_TAG_array_type DIE and put it in
6519 the DIE's type field. For now, this only handles one dimensional
6522 static struct type *
6523 read_array_type (struct die_info *die, struct dwarf2_cu *cu)
6525 struct objfile *objfile = cu->objfile;
6526 struct die_info *child_die;
6528 struct type *element_type, *range_type, *index_type;
6529 struct type **range_types = NULL;
6530 struct attribute *attr;
6532 struct cleanup *back_to;
6535 element_type = die_type (die, cu);
6537 /* The die_type call above may have already set the type for this DIE. */
6538 type = get_die_type (die, cu);
6542 /* Irix 6.2 native cc creates array types without children for
6543 arrays with unspecified length. */
6544 if (die->child == NULL)
6546 index_type = objfile_type (objfile)->builtin_int;
6547 range_type = create_range_type (NULL, index_type, 0, -1);
6548 type = create_array_type (NULL, element_type, range_type);
6549 return set_die_type (die, type, cu);
6552 back_to = make_cleanup (null_cleanup, NULL);
6553 child_die = die->child;
6554 while (child_die && child_die->tag)
6556 if (child_die->tag == DW_TAG_subrange_type)
6558 struct type *child_type = read_type_die (child_die, cu);
6560 if (child_type != NULL)
6562 /* The range type was succesfully read. Save it for
6563 the array type creation. */
6564 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
6566 range_types = (struct type **)
6567 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
6568 * sizeof (struct type *));
6570 make_cleanup (free_current_contents, &range_types);
6572 range_types[ndim++] = child_type;
6575 child_die = sibling_die (child_die);
6578 /* Dwarf2 dimensions are output from left to right, create the
6579 necessary array types in backwards order. */
6581 type = element_type;
6583 if (read_array_order (die, cu) == DW_ORD_col_major)
6588 type = create_array_type (NULL, type, range_types[i++]);
6593 type = create_array_type (NULL, type, range_types[ndim]);
6596 /* Understand Dwarf2 support for vector types (like they occur on
6597 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
6598 array type. This is not part of the Dwarf2/3 standard yet, but a
6599 custom vendor extension. The main difference between a regular
6600 array and the vector variant is that vectors are passed by value
6602 attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
6604 make_vector_type (type);
6606 name = dwarf2_name (die, cu);
6608 TYPE_NAME (type) = name;
6610 /* Install the type in the die. */
6611 set_die_type (die, type, cu);
6613 /* set_die_type should be already done. */
6614 set_descriptive_type (type, die, cu);
6616 do_cleanups (back_to);
6621 static enum dwarf_array_dim_ordering
6622 read_array_order (struct die_info *die, struct dwarf2_cu *cu)
6624 struct attribute *attr;
6626 attr = dwarf2_attr (die, DW_AT_ordering, cu);
6628 if (attr) return DW_SND (attr);
6631 GNU F77 is a special case, as at 08/2004 array type info is the
6632 opposite order to the dwarf2 specification, but data is still
6633 laid out as per normal fortran.
6635 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
6639 if (cu->language == language_fortran
6640 && cu->producer && strstr (cu->producer, "GNU F77"))
6642 return DW_ORD_row_major;
6645 switch (cu->language_defn->la_array_ordering)
6647 case array_column_major:
6648 return DW_ORD_col_major;
6649 case array_row_major:
6651 return DW_ORD_row_major;
6655 /* Extract all information from a DW_TAG_set_type DIE and put it in
6656 the DIE's type field. */
6658 static struct type *
6659 read_set_type (struct die_info *die, struct dwarf2_cu *cu)
6661 struct type *domain_type, *set_type;
6662 struct attribute *attr;
6664 domain_type = die_type (die, cu);
6666 /* The die_type call above may have already set the type for this DIE. */
6667 set_type = get_die_type (die, cu);
6671 set_type = create_set_type (NULL, domain_type);
6673 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6675 TYPE_LENGTH (set_type) = DW_UNSND (attr);
6677 return set_die_type (die, set_type, cu);
6680 /* First cut: install each common block member as a global variable. */
6683 read_common_block (struct die_info *die, struct dwarf2_cu *cu)
6685 struct die_info *child_die;
6686 struct attribute *attr;
6688 CORE_ADDR base = (CORE_ADDR) 0;
6690 attr = dwarf2_attr (die, DW_AT_location, cu);
6693 /* Support the .debug_loc offsets */
6694 if (attr_form_is_block (attr))
6696 base = decode_locdesc (DW_BLOCK (attr), cu);
6698 else if (attr_form_is_section_offset (attr))
6700 dwarf2_complex_location_expr_complaint ();
6704 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
6705 "common block member");
6708 if (die->child != NULL)
6710 child_die = die->child;
6711 while (child_die && child_die->tag)
6713 sym = new_symbol (child_die, NULL, cu);
6714 attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu);
6717 CORE_ADDR byte_offset = 0;
6719 if (attr_form_is_section_offset (attr))
6720 dwarf2_complex_location_expr_complaint ();
6721 else if (attr_form_is_constant (attr))
6722 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
6723 else if (attr_form_is_block (attr))
6724 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
6726 dwarf2_complex_location_expr_complaint ();
6728 SYMBOL_VALUE_ADDRESS (sym) = base + byte_offset;
6729 add_symbol_to_list (sym, &global_symbols);
6731 child_die = sibling_die (child_die);
6736 /* Create a type for a C++ namespace. */
6738 static struct type *
6739 read_namespace_type (struct die_info *die, struct dwarf2_cu *cu)
6741 struct objfile *objfile = cu->objfile;
6742 const char *previous_prefix, *name;
6746 /* For extensions, reuse the type of the original namespace. */
6747 if (dwarf2_attr (die, DW_AT_extension, cu) != NULL)
6749 struct die_info *ext_die;
6750 struct dwarf2_cu *ext_cu = cu;
6752 ext_die = dwarf2_extension (die, &ext_cu);
6753 type = read_type_die (ext_die, ext_cu);
6754 return set_die_type (die, type, cu);
6757 name = namespace_name (die, &is_anonymous, cu);
6759 /* Now build the name of the current namespace. */
6761 previous_prefix = determine_prefix (die, cu);
6762 if (previous_prefix[0] != '\0')
6763 name = typename_concat (&objfile->objfile_obstack,
6764 previous_prefix, name, 0, cu);
6766 /* Create the type. */
6767 type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL,
6769 TYPE_NAME (type) = (char *) name;
6770 TYPE_TAG_NAME (type) = TYPE_NAME (type);
6772 return set_die_type (die, type, cu);
6775 /* Read a C++ namespace. */
6778 read_namespace (struct die_info *die, struct dwarf2_cu *cu)
6780 struct objfile *objfile = cu->objfile;
6784 /* Add a symbol associated to this if we haven't seen the namespace
6785 before. Also, add a using directive if it's an anonymous
6788 if (dwarf2_attr (die, DW_AT_extension, cu) == NULL)
6792 type = read_type_die (die, cu);
6793 new_symbol (die, type, cu);
6795 name = namespace_name (die, &is_anonymous, cu);
6798 const char *previous_prefix = determine_prefix (die, cu);
6800 cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL,
6801 NULL, &objfile->objfile_obstack);
6805 if (die->child != NULL)
6807 struct die_info *child_die = die->child;
6809 while (child_die && child_die->tag)
6811 process_die (child_die, cu);
6812 child_die = sibling_die (child_die);
6817 /* Read a Fortran module as type. This DIE can be only a declaration used for
6818 imported module. Still we need that type as local Fortran "use ... only"
6819 declaration imports depend on the created type in determine_prefix. */
6821 static struct type *
6822 read_module_type (struct die_info *die, struct dwarf2_cu *cu)
6824 struct objfile *objfile = cu->objfile;
6828 module_name = dwarf2_name (die, cu);
6830 complaint (&symfile_complaints, _("DW_TAG_module has no name, offset 0x%x"),
6832 type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile);
6834 /* determine_prefix uses TYPE_TAG_NAME. */
6835 TYPE_TAG_NAME (type) = TYPE_NAME (type);
6837 return set_die_type (die, type, cu);
6840 /* Read a Fortran module. */
6843 read_module (struct die_info *die, struct dwarf2_cu *cu)
6845 struct die_info *child_die = die->child;
6847 while (child_die && child_die->tag)
6849 process_die (child_die, cu);
6850 child_die = sibling_die (child_die);
6854 /* Return the name of the namespace represented by DIE. Set
6855 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
6859 namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
6861 struct die_info *current_die;
6862 const char *name = NULL;
6864 /* Loop through the extensions until we find a name. */
6866 for (current_die = die;
6867 current_die != NULL;
6868 current_die = dwarf2_extension (die, &cu))
6870 name = dwarf2_name (current_die, cu);
6875 /* Is it an anonymous namespace? */
6877 *is_anonymous = (name == NULL);
6879 name = "(anonymous namespace)";
6884 /* Extract all information from a DW_TAG_pointer_type DIE and add to
6885 the user defined type vector. */
6887 static struct type *
6888 read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
6890 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
6891 struct comp_unit_head *cu_header = &cu->header;
6893 struct attribute *attr_byte_size;
6894 struct attribute *attr_address_class;
6895 int byte_size, addr_class;
6896 struct type *target_type;
6898 target_type = die_type (die, cu);
6900 /* The die_type call above may have already set the type for this DIE. */
6901 type = get_die_type (die, cu);
6905 type = lookup_pointer_type (target_type);
6907 attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
6909 byte_size = DW_UNSND (attr_byte_size);
6911 byte_size = cu_header->addr_size;
6913 attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
6914 if (attr_address_class)
6915 addr_class = DW_UNSND (attr_address_class);
6917 addr_class = DW_ADDR_none;
6919 /* If the pointer size or address class is different than the
6920 default, create a type variant marked as such and set the
6921 length accordingly. */
6922 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
6924 if (gdbarch_address_class_type_flags_p (gdbarch))
6928 type_flags = gdbarch_address_class_type_flags
6929 (gdbarch, byte_size, addr_class);
6930 gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
6932 type = make_type_with_address_space (type, type_flags);
6934 else if (TYPE_LENGTH (type) != byte_size)
6936 complaint (&symfile_complaints, _("invalid pointer size %d"), byte_size);
6940 /* Should we also complain about unhandled address classes? */
6944 TYPE_LENGTH (type) = byte_size;
6945 return set_die_type (die, type, cu);
6948 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
6949 the user defined type vector. */
6951 static struct type *
6952 read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
6955 struct type *to_type;
6956 struct type *domain;
6958 to_type = die_type (die, cu);
6959 domain = die_containing_type (die, cu);
6961 /* The calls above may have already set the type for this DIE. */
6962 type = get_die_type (die, cu);
6966 if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
6967 type = lookup_methodptr_type (to_type);
6969 type = lookup_memberptr_type (to_type, domain);
6971 return set_die_type (die, type, cu);
6974 /* Extract all information from a DW_TAG_reference_type DIE and add to
6975 the user defined type vector. */
6977 static struct type *
6978 read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
6980 struct comp_unit_head *cu_header = &cu->header;
6981 struct type *type, *target_type;
6982 struct attribute *attr;
6984 target_type = die_type (die, cu);
6986 /* The die_type call above may have already set the type for this DIE. */
6987 type = get_die_type (die, cu);
6991 type = lookup_reference_type (target_type);
6992 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6995 TYPE_LENGTH (type) = DW_UNSND (attr);
6999 TYPE_LENGTH (type) = cu_header->addr_size;
7001 return set_die_type (die, type, cu);
7004 static struct type *
7005 read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
7007 struct type *base_type, *cv_type;
7009 base_type = die_type (die, cu);
7011 /* The die_type call above may have already set the type for this DIE. */
7012 cv_type = get_die_type (die, cu);
7016 cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
7017 return set_die_type (die, cv_type, cu);
7020 static struct type *
7021 read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
7023 struct type *base_type, *cv_type;
7025 base_type = die_type (die, cu);
7027 /* The die_type call above may have already set the type for this DIE. */
7028 cv_type = get_die_type (die, cu);
7032 cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
7033 return set_die_type (die, cv_type, cu);
7036 /* Extract all information from a DW_TAG_string_type DIE and add to
7037 the user defined type vector. It isn't really a user defined type,
7038 but it behaves like one, with other DIE's using an AT_user_def_type
7039 attribute to reference it. */
7041 static struct type *
7042 read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
7044 struct objfile *objfile = cu->objfile;
7045 struct gdbarch *gdbarch = get_objfile_arch (objfile);
7046 struct type *type, *range_type, *index_type, *char_type;
7047 struct attribute *attr;
7048 unsigned int length;
7050 attr = dwarf2_attr (die, DW_AT_string_length, cu);
7053 length = DW_UNSND (attr);
7057 /* check for the DW_AT_byte_size attribute */
7058 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7061 length = DW_UNSND (attr);
7069 index_type = objfile_type (objfile)->builtin_int;
7070 range_type = create_range_type (NULL, index_type, 1, length);
7071 char_type = language_string_char_type (cu->language_defn, gdbarch);
7072 type = create_string_type (NULL, char_type, range_type);
7074 return set_die_type (die, type, cu);
7077 /* Handle DIES due to C code like:
7081 int (*funcp)(int a, long l);
7085 ('funcp' generates a DW_TAG_subroutine_type DIE)
7088 static struct type *
7089 read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
7091 struct type *type; /* Type that this function returns */
7092 struct type *ftype; /* Function that returns above type */
7093 struct attribute *attr;
7095 type = die_type (die, cu);
7097 /* The die_type call above may have already set the type for this DIE. */
7098 ftype = get_die_type (die, cu);
7102 ftype = lookup_function_type (type);
7104 /* All functions in C++, Pascal and Java have prototypes. */
7105 attr = dwarf2_attr (die, DW_AT_prototyped, cu);
7106 if ((attr && (DW_UNSND (attr) != 0))
7107 || cu->language == language_cplus
7108 || cu->language == language_java
7109 || cu->language == language_pascal)
7110 TYPE_PROTOTYPED (ftype) = 1;
7111 else if (producer_is_realview (cu->producer))
7112 /* RealView does not emit DW_AT_prototyped. We can not
7113 distinguish prototyped and unprototyped functions; default to
7114 prototyped, since that is more common in modern code (and
7115 RealView warns about unprototyped functions). */
7116 TYPE_PROTOTYPED (ftype) = 1;
7118 /* Store the calling convention in the type if it's available in
7119 the subroutine die. Otherwise set the calling convention to
7120 the default value DW_CC_normal. */
7121 attr = dwarf2_attr (die, DW_AT_calling_convention, cu);
7122 TYPE_CALLING_CONVENTION (ftype) = attr ? DW_UNSND (attr) : DW_CC_normal;
7124 /* We need to add the subroutine type to the die immediately so
7125 we don't infinitely recurse when dealing with parameters
7126 declared as the same subroutine type. */
7127 set_die_type (die, ftype, cu);
7129 if (die->child != NULL)
7131 struct type *void_type = objfile_type (cu->objfile)->builtin_void;
7132 struct die_info *child_die;
7133 int nparams, iparams;
7135 /* Count the number of parameters.
7136 FIXME: GDB currently ignores vararg functions, but knows about
7137 vararg member functions. */
7139 child_die = die->child;
7140 while (child_die && child_die->tag)
7142 if (child_die->tag == DW_TAG_formal_parameter)
7144 else if (child_die->tag == DW_TAG_unspecified_parameters)
7145 TYPE_VARARGS (ftype) = 1;
7146 child_die = sibling_die (child_die);
7149 /* Allocate storage for parameters and fill them in. */
7150 TYPE_NFIELDS (ftype) = nparams;
7151 TYPE_FIELDS (ftype) = (struct field *)
7152 TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
7154 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
7155 even if we error out during the parameters reading below. */
7156 for (iparams = 0; iparams < nparams; iparams++)
7157 TYPE_FIELD_TYPE (ftype, iparams) = void_type;
7160 child_die = die->child;
7161 while (child_die && child_die->tag)
7163 if (child_die->tag == DW_TAG_formal_parameter)
7165 /* Dwarf2 has no clean way to discern C++ static and non-static
7166 member functions. G++ helps GDB by marking the first
7167 parameter for non-static member functions (which is the
7168 this pointer) as artificial. We pass this information
7169 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
7170 attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
7172 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
7175 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
7177 /* GCC/43521: In java, the formal parameter
7178 "this" is sometimes not marked with DW_AT_artificial. */
7179 if (cu->language == language_java)
7181 const char *name = dwarf2_name (child_die, cu);
7183 if (name && !strcmp (name, "this"))
7184 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1;
7187 TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, cu);
7190 child_die = sibling_die (child_die);
7197 static struct type *
7198 read_typedef (struct die_info *die, struct dwarf2_cu *cu)
7200 struct objfile *objfile = cu->objfile;
7201 const char *name = NULL;
7202 struct type *this_type;
7204 name = dwarf2_full_name (NULL, die, cu);
7205 this_type = init_type (TYPE_CODE_TYPEDEF, 0,
7206 TYPE_FLAG_TARGET_STUB, NULL, objfile);
7207 TYPE_NAME (this_type) = (char *) name;
7208 set_die_type (die, this_type, cu);
7209 TYPE_TARGET_TYPE (this_type) = die_type (die, cu);
7213 /* Find a representation of a given base type and install
7214 it in the TYPE field of the die. */
7216 static struct type *
7217 read_base_type (struct die_info *die, struct dwarf2_cu *cu)
7219 struct objfile *objfile = cu->objfile;
7221 struct attribute *attr;
7222 int encoding = 0, size = 0;
7224 enum type_code code = TYPE_CODE_INT;
7226 struct type *target_type = NULL;
7228 attr = dwarf2_attr (die, DW_AT_encoding, cu);
7231 encoding = DW_UNSND (attr);
7233 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7236 size = DW_UNSND (attr);
7238 name = dwarf2_name (die, cu);
7241 complaint (&symfile_complaints,
7242 _("DW_AT_name missing from DW_TAG_base_type"));
7247 case DW_ATE_address:
7248 /* Turn DW_ATE_address into a void * pointer. */
7249 code = TYPE_CODE_PTR;
7250 type_flags |= TYPE_FLAG_UNSIGNED;
7251 target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
7253 case DW_ATE_boolean:
7254 code = TYPE_CODE_BOOL;
7255 type_flags |= TYPE_FLAG_UNSIGNED;
7257 case DW_ATE_complex_float:
7258 code = TYPE_CODE_COMPLEX;
7259 target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
7261 case DW_ATE_decimal_float:
7262 code = TYPE_CODE_DECFLOAT;
7265 code = TYPE_CODE_FLT;
7269 case DW_ATE_unsigned:
7270 type_flags |= TYPE_FLAG_UNSIGNED;
7272 case DW_ATE_signed_char:
7273 if (cu->language == language_ada || cu->language == language_m2
7274 || cu->language == language_pascal)
7275 code = TYPE_CODE_CHAR;
7277 case DW_ATE_unsigned_char:
7278 if (cu->language == language_ada || cu->language == language_m2
7279 || cu->language == language_pascal)
7280 code = TYPE_CODE_CHAR;
7281 type_flags |= TYPE_FLAG_UNSIGNED;
7284 /* We just treat this as an integer and then recognize the
7285 type by name elsewhere. */
7289 complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
7290 dwarf_type_encoding_name (encoding));
7294 type = init_type (code, size, type_flags, NULL, objfile);
7295 TYPE_NAME (type) = name;
7296 TYPE_TARGET_TYPE (type) = target_type;
7298 if (name && strcmp (name, "char") == 0)
7299 TYPE_NOSIGN (type) = 1;
7301 return set_die_type (die, type, cu);
7304 /* Read the given DW_AT_subrange DIE. */
7306 static struct type *
7307 read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
7309 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
7310 struct type *base_type;
7311 struct type *range_type;
7312 struct attribute *attr;
7316 LONGEST negative_mask;
7318 base_type = die_type (die, cu);
7319 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
7320 check_typedef (base_type);
7322 /* The die_type call above may have already set the type for this DIE. */
7323 range_type = get_die_type (die, cu);
7327 if (cu->language == language_fortran)
7329 /* FORTRAN implies a lower bound of 1, if not given. */
7333 /* FIXME: For variable sized arrays either of these could be
7334 a variable rather than a constant value. We'll allow it,
7335 but we don't know how to handle it. */
7336 attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
7338 low = dwarf2_get_attr_constant_value (attr, 0);
7340 attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
7343 if (attr->form == DW_FORM_block1 || is_ref_attr (attr))
7345 /* GCC encodes arrays with unspecified or dynamic length
7346 with a DW_FORM_block1 attribute or a reference attribute.
7347 FIXME: GDB does not yet know how to handle dynamic
7348 arrays properly, treat them as arrays with unspecified
7351 FIXME: jimb/2003-09-22: GDB does not really know
7352 how to handle arrays of unspecified length
7353 either; we just represent them as zero-length
7354 arrays. Choose an appropriate upper bound given
7355 the lower bound we've computed above. */
7359 high = dwarf2_get_attr_constant_value (attr, 1);
7363 attr = dwarf2_attr (die, DW_AT_count, cu);
7366 int count = dwarf2_get_attr_constant_value (attr, 1);
7367 high = low + count - 1;
7371 /* Dwarf-2 specifications explicitly allows to create subrange types
7372 without specifying a base type.
7373 In that case, the base type must be set to the type of
7374 the lower bound, upper bound or count, in that order, if any of these
7375 three attributes references an object that has a type.
7376 If no base type is found, the Dwarf-2 specifications say that
7377 a signed integer type of size equal to the size of an address should
7379 For the following C code: `extern char gdb_int [];'
7380 GCC produces an empty range DIE.
7381 FIXME: muller/2010-05-28: Possible references to object for low bound,
7382 high bound or count are not yet handled by this code.
7384 if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
7386 struct objfile *objfile = cu->objfile;
7387 struct gdbarch *gdbarch = get_objfile_arch (objfile);
7388 int addr_size = gdbarch_addr_bit (gdbarch) /8;
7389 struct type *int_type = objfile_type (objfile)->builtin_int;
7391 /* Test "int", "long int", and "long long int" objfile types,
7392 and select the first one having a size above or equal to the
7393 architecture address size. */
7394 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
7395 base_type = int_type;
7398 int_type = objfile_type (objfile)->builtin_long;
7399 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
7400 base_type = int_type;
7403 int_type = objfile_type (objfile)->builtin_long_long;
7404 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
7405 base_type = int_type;
7411 (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1);
7412 if (!TYPE_UNSIGNED (base_type) && (low & negative_mask))
7413 low |= negative_mask;
7414 if (!TYPE_UNSIGNED (base_type) && (high & negative_mask))
7415 high |= negative_mask;
7417 range_type = create_range_type (NULL, base_type, low, high);
7419 /* Mark arrays with dynamic length at least as an array of unspecified
7420 length. GDB could check the boundary but before it gets implemented at
7421 least allow accessing the array elements. */
7422 if (attr && attr->form == DW_FORM_block1)
7423 TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1;
7425 name = dwarf2_name (die, cu);
7427 TYPE_NAME (range_type) = name;
7429 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7431 TYPE_LENGTH (range_type) = DW_UNSND (attr);
7433 set_die_type (die, range_type, cu);
7435 /* set_die_type should be already done. */
7436 set_descriptive_type (range_type, die, cu);
7441 static struct type *
7442 read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
7446 /* For now, we only support the C meaning of an unspecified type: void. */
7448 type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile);
7449 TYPE_NAME (type) = dwarf2_name (die, cu);
7451 return set_die_type (die, type, cu);
7454 /* Trivial hash function for die_info: the hash value of a DIE
7455 is its offset in .debug_info for this objfile. */
7458 die_hash (const void *item)
7460 const struct die_info *die = item;
7465 /* Trivial comparison function for die_info structures: two DIEs
7466 are equal if they have the same offset. */
7469 die_eq (const void *item_lhs, const void *item_rhs)
7471 const struct die_info *die_lhs = item_lhs;
7472 const struct die_info *die_rhs = item_rhs;
7474 return die_lhs->offset == die_rhs->offset;
7477 /* Read a whole compilation unit into a linked list of dies. */
7479 static struct die_info *
7480 read_comp_unit (gdb_byte *info_ptr, struct dwarf2_cu *cu)
7482 struct die_reader_specs reader_specs;
7484 gdb_assert (cu->die_hash == NULL);
7486 = htab_create_alloc_ex (cu->header.length / 12,
7490 &cu->comp_unit_obstack,
7491 hashtab_obstack_allocate,
7492 dummy_obstack_deallocate);
7494 init_cu_die_reader (&reader_specs, cu);
7496 return read_die_and_children (&reader_specs, info_ptr, &info_ptr, NULL);
7499 /* Main entry point for reading a DIE and all children.
7500 Read the DIE and dump it if requested. */
7502 static struct die_info *
7503 read_die_and_children (const struct die_reader_specs *reader,
7505 gdb_byte **new_info_ptr,
7506 struct die_info *parent)
7508 struct die_info *result = read_die_and_children_1 (reader, info_ptr,
7509 new_info_ptr, parent);
7511 if (dwarf2_die_debug)
7513 fprintf_unfiltered (gdb_stdlog,
7514 "\nRead die from %s of %s:\n",
7515 reader->buffer == dwarf2_per_objfile->info.buffer
7517 : reader->buffer == dwarf2_per_objfile->types.buffer
7519 : "unknown section",
7520 reader->abfd->filename);
7521 dump_die (result, dwarf2_die_debug);
7527 /* Read a single die and all its descendents. Set the die's sibling
7528 field to NULL; set other fields in the die correctly, and set all
7529 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
7530 location of the info_ptr after reading all of those dies. PARENT
7531 is the parent of the die in question. */
7533 static struct die_info *
7534 read_die_and_children_1 (const struct die_reader_specs *reader,
7536 gdb_byte **new_info_ptr,
7537 struct die_info *parent)
7539 struct die_info *die;
7543 cur_ptr = read_full_die (reader, &die, info_ptr, &has_children);
7546 *new_info_ptr = cur_ptr;
7549 store_in_ref_table (die, reader->cu);
7552 die->child = read_die_and_siblings (reader, cur_ptr, new_info_ptr, die);
7556 *new_info_ptr = cur_ptr;
7559 die->sibling = NULL;
7560 die->parent = parent;
7564 /* Read a die, all of its descendents, and all of its siblings; set
7565 all of the fields of all of the dies correctly. Arguments are as
7566 in read_die_and_children. */
7568 static struct die_info *
7569 read_die_and_siblings (const struct die_reader_specs *reader,
7571 gdb_byte **new_info_ptr,
7572 struct die_info *parent)
7574 struct die_info *first_die, *last_sibling;
7578 first_die = last_sibling = NULL;
7582 struct die_info *die
7583 = read_die_and_children_1 (reader, cur_ptr, &cur_ptr, parent);
7587 *new_info_ptr = cur_ptr;
7594 last_sibling->sibling = die;
7600 /* Read the die from the .debug_info section buffer. Set DIEP to
7601 point to a newly allocated die with its information, except for its
7602 child, sibling, and parent fields. Set HAS_CHILDREN to tell
7603 whether the die has children or not. */
7606 read_full_die (const struct die_reader_specs *reader,
7607 struct die_info **diep, gdb_byte *info_ptr,
7610 unsigned int abbrev_number, bytes_read, i, offset;
7611 struct abbrev_info *abbrev;
7612 struct die_info *die;
7613 struct dwarf2_cu *cu = reader->cu;
7614 bfd *abfd = reader->abfd;
7616 offset = info_ptr - reader->buffer;
7617 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7618 info_ptr += bytes_read;
7626 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
7628 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
7630 bfd_get_filename (abfd));
7632 die = dwarf_alloc_die (cu, abbrev->num_attrs);
7633 die->offset = offset;
7634 die->tag = abbrev->tag;
7635 die->abbrev = abbrev_number;
7637 die->num_attrs = abbrev->num_attrs;
7639 for (i = 0; i < abbrev->num_attrs; ++i)
7640 info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
7641 abfd, info_ptr, cu);
7644 *has_children = abbrev->has_children;
7648 /* In DWARF version 2, the description of the debugging information is
7649 stored in a separate .debug_abbrev section. Before we read any
7650 dies from a section we read in all abbreviations and install them
7651 in a hash table. This function also sets flags in CU describing
7652 the data found in the abbrev table. */
7655 dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu)
7657 struct comp_unit_head *cu_header = &cu->header;
7658 gdb_byte *abbrev_ptr;
7659 struct abbrev_info *cur_abbrev;
7660 unsigned int abbrev_number, bytes_read, abbrev_name;
7661 unsigned int abbrev_form, hash_number;
7662 struct attr_abbrev *cur_attrs;
7663 unsigned int allocated_attrs;
7665 /* Initialize dwarf2 abbrevs */
7666 obstack_init (&cu->abbrev_obstack);
7667 cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack,
7669 * sizeof (struct abbrev_info *)));
7670 memset (cu->dwarf2_abbrevs, 0,
7671 ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
7673 dwarf2_read_section (dwarf2_per_objfile->objfile,
7674 &dwarf2_per_objfile->abbrev);
7675 abbrev_ptr = dwarf2_per_objfile->abbrev.buffer + cu_header->abbrev_offset;
7676 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
7677 abbrev_ptr += bytes_read;
7679 allocated_attrs = ATTR_ALLOC_CHUNK;
7680 cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
7682 /* loop until we reach an abbrev number of 0 */
7683 while (abbrev_number)
7685 cur_abbrev = dwarf_alloc_abbrev (cu);
7687 /* read in abbrev header */
7688 cur_abbrev->number = abbrev_number;
7689 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
7690 abbrev_ptr += bytes_read;
7691 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
7694 if (cur_abbrev->tag == DW_TAG_namespace)
7695 cu->has_namespace_info = 1;
7697 /* now read in declarations */
7698 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
7699 abbrev_ptr += bytes_read;
7700 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
7701 abbrev_ptr += bytes_read;
7704 if (cur_abbrev->num_attrs == allocated_attrs)
7706 allocated_attrs += ATTR_ALLOC_CHUNK;
7708 = xrealloc (cur_attrs, (allocated_attrs
7709 * sizeof (struct attr_abbrev)));
7712 /* Record whether this compilation unit might have
7713 inter-compilation-unit references. If we don't know what form
7714 this attribute will have, then it might potentially be a
7715 DW_FORM_ref_addr, so we conservatively expect inter-CU
7718 if (abbrev_form == DW_FORM_ref_addr
7719 || abbrev_form == DW_FORM_indirect)
7720 cu->has_form_ref_addr = 1;
7722 cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
7723 cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
7724 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
7725 abbrev_ptr += bytes_read;
7726 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
7727 abbrev_ptr += bytes_read;
7730 cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack,
7731 (cur_abbrev->num_attrs
7732 * sizeof (struct attr_abbrev)));
7733 memcpy (cur_abbrev->attrs, cur_attrs,
7734 cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
7736 hash_number = abbrev_number % ABBREV_HASH_SIZE;
7737 cur_abbrev->next = cu->dwarf2_abbrevs[hash_number];
7738 cu->dwarf2_abbrevs[hash_number] = cur_abbrev;
7740 /* Get next abbreviation.
7741 Under Irix6 the abbreviations for a compilation unit are not
7742 always properly terminated with an abbrev number of 0.
7743 Exit loop if we encounter an abbreviation which we have
7744 already read (which means we are about to read the abbreviations
7745 for the next compile unit) or if the end of the abbreviation
7746 table is reached. */
7747 if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev.buffer)
7748 >= dwarf2_per_objfile->abbrev.size)
7750 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
7751 abbrev_ptr += bytes_read;
7752 if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL)
7759 /* Release the memory used by the abbrev table for a compilation unit. */
7762 dwarf2_free_abbrev_table (void *ptr_to_cu)
7764 struct dwarf2_cu *cu = ptr_to_cu;
7766 obstack_free (&cu->abbrev_obstack, NULL);
7767 cu->dwarf2_abbrevs = NULL;
7770 /* Lookup an abbrev_info structure in the abbrev hash table. */
7772 static struct abbrev_info *
7773 dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu)
7775 unsigned int hash_number;
7776 struct abbrev_info *abbrev;
7778 hash_number = number % ABBREV_HASH_SIZE;
7779 abbrev = cu->dwarf2_abbrevs[hash_number];
7783 if (abbrev->number == number)
7786 abbrev = abbrev->next;
7791 /* Returns nonzero if TAG represents a type that we might generate a partial
7795 is_type_tag_for_partial (int tag)
7800 /* Some types that would be reasonable to generate partial symbols for,
7801 that we don't at present. */
7802 case DW_TAG_array_type:
7803 case DW_TAG_file_type:
7804 case DW_TAG_ptr_to_member_type:
7805 case DW_TAG_set_type:
7806 case DW_TAG_string_type:
7807 case DW_TAG_subroutine_type:
7809 case DW_TAG_base_type:
7810 case DW_TAG_class_type:
7811 case DW_TAG_interface_type:
7812 case DW_TAG_enumeration_type:
7813 case DW_TAG_structure_type:
7814 case DW_TAG_subrange_type:
7815 case DW_TAG_typedef:
7816 case DW_TAG_union_type:
7823 /* Load all DIEs that are interesting for partial symbols into memory. */
7825 static struct partial_die_info *
7826 load_partial_dies (bfd *abfd, gdb_byte *buffer, gdb_byte *info_ptr,
7827 int building_psymtab, struct dwarf2_cu *cu)
7829 struct partial_die_info *part_die;
7830 struct partial_die_info *parent_die, *last_die, *first_die = NULL;
7831 struct abbrev_info *abbrev;
7832 unsigned int bytes_read;
7833 unsigned int load_all = 0;
7835 int nesting_level = 1;
7840 if (cu->per_cu && cu->per_cu->load_all_dies)
7844 = htab_create_alloc_ex (cu->header.length / 12,
7848 &cu->comp_unit_obstack,
7849 hashtab_obstack_allocate,
7850 dummy_obstack_deallocate);
7852 part_die = obstack_alloc (&cu->comp_unit_obstack,
7853 sizeof (struct partial_die_info));
7857 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
7859 /* A NULL abbrev means the end of a series of children. */
7862 if (--nesting_level == 0)
7864 /* PART_DIE was probably the last thing allocated on the
7865 comp_unit_obstack, so we could call obstack_free
7866 here. We don't do that because the waste is small,
7867 and will be cleaned up when we're done with this
7868 compilation unit. This way, we're also more robust
7869 against other users of the comp_unit_obstack. */
7872 info_ptr += bytes_read;
7873 last_die = parent_die;
7874 parent_die = parent_die->die_parent;
7878 /* Check whether this DIE is interesting enough to save. Normally
7879 we would not be interested in members here, but there may be
7880 later variables referencing them via DW_AT_specification (for
7883 && !is_type_tag_for_partial (abbrev->tag)
7884 && abbrev->tag != DW_TAG_enumerator
7885 && abbrev->tag != DW_TAG_subprogram
7886 && abbrev->tag != DW_TAG_lexical_block
7887 && abbrev->tag != DW_TAG_variable
7888 && abbrev->tag != DW_TAG_namespace
7889 && abbrev->tag != DW_TAG_module
7890 && abbrev->tag != DW_TAG_member)
7892 /* Otherwise we skip to the next sibling, if any. */
7893 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
7897 info_ptr = read_partial_die (part_die, abbrev, bytes_read, abfd,
7898 buffer, info_ptr, cu);
7900 /* This two-pass algorithm for processing partial symbols has a
7901 high cost in cache pressure. Thus, handle some simple cases
7902 here which cover the majority of C partial symbols. DIEs
7903 which neither have specification tags in them, nor could have
7904 specification tags elsewhere pointing at them, can simply be
7905 processed and discarded.
7907 This segment is also optional; scan_partial_symbols and
7908 add_partial_symbol will handle these DIEs if we chain
7909 them in normally. When compilers which do not emit large
7910 quantities of duplicate debug information are more common,
7911 this code can probably be removed. */
7913 /* Any complete simple types at the top level (pretty much all
7914 of them, for a language without namespaces), can be processed
7916 if (parent_die == NULL
7917 && part_die->has_specification == 0
7918 && part_die->is_declaration == 0
7919 && (part_die->tag == DW_TAG_typedef
7920 || part_die->tag == DW_TAG_base_type
7921 || part_die->tag == DW_TAG_subrange_type))
7923 if (building_psymtab && part_die->name != NULL)
7924 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
7925 VAR_DOMAIN, LOC_TYPEDEF,
7926 &cu->objfile->static_psymbols,
7927 0, (CORE_ADDR) 0, cu->language, cu->objfile);
7928 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
7932 /* If we're at the second level, and we're an enumerator, and
7933 our parent has no specification (meaning possibly lives in a
7934 namespace elsewhere), then we can add the partial symbol now
7935 instead of queueing it. */
7936 if (part_die->tag == DW_TAG_enumerator
7937 && parent_die != NULL
7938 && parent_die->die_parent == NULL
7939 && parent_die->tag == DW_TAG_enumeration_type
7940 && parent_die->has_specification == 0)
7942 if (part_die->name == NULL)
7943 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
7944 else if (building_psymtab)
7945 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
7946 VAR_DOMAIN, LOC_CONST,
7947 (cu->language == language_cplus
7948 || cu->language == language_java)
7949 ? &cu->objfile->global_psymbols
7950 : &cu->objfile->static_psymbols,
7951 0, (CORE_ADDR) 0, cu->language, cu->objfile);
7953 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
7957 /* We'll save this DIE so link it in. */
7958 part_die->die_parent = parent_die;
7959 part_die->die_sibling = NULL;
7960 part_die->die_child = NULL;
7962 if (last_die && last_die == parent_die)
7963 last_die->die_child = part_die;
7965 last_die->die_sibling = part_die;
7967 last_die = part_die;
7969 if (first_die == NULL)
7970 first_die = part_die;
7972 /* Maybe add the DIE to the hash table. Not all DIEs that we
7973 find interesting need to be in the hash table, because we
7974 also have the parent/sibling/child chains; only those that we
7975 might refer to by offset later during partial symbol reading.
7977 For now this means things that might have be the target of a
7978 DW_AT_specification, DW_AT_abstract_origin, or
7979 DW_AT_extension. DW_AT_extension will refer only to
7980 namespaces; DW_AT_abstract_origin refers to functions (and
7981 many things under the function DIE, but we do not recurse
7982 into function DIEs during partial symbol reading) and
7983 possibly variables as well; DW_AT_specification refers to
7984 declarations. Declarations ought to have the DW_AT_declaration
7985 flag. It happens that GCC forgets to put it in sometimes, but
7986 only for functions, not for types.
7988 Adding more things than necessary to the hash table is harmless
7989 except for the performance cost. Adding too few will result in
7990 wasted time in find_partial_die, when we reread the compilation
7991 unit with load_all_dies set. */
7994 || abbrev->tag == DW_TAG_subprogram
7995 || abbrev->tag == DW_TAG_variable
7996 || abbrev->tag == DW_TAG_namespace
7997 || part_die->is_declaration)
8001 slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
8002 part_die->offset, INSERT);
8006 part_die = obstack_alloc (&cu->comp_unit_obstack,
8007 sizeof (struct partial_die_info));
8009 /* For some DIEs we want to follow their children (if any). For C
8010 we have no reason to follow the children of structures; for other
8011 languages we have to, both so that we can get at method physnames
8012 to infer fully qualified class names, and for DW_AT_specification.
8014 For Ada, we need to scan the children of subprograms and lexical
8015 blocks as well because Ada allows the definition of nested
8016 entities that could be interesting for the debugger, such as
8017 nested subprograms for instance. */
8018 if (last_die->has_children
8020 || last_die->tag == DW_TAG_namespace
8021 || last_die->tag == DW_TAG_module
8022 || last_die->tag == DW_TAG_enumeration_type
8023 || (cu->language != language_c
8024 && (last_die->tag == DW_TAG_class_type
8025 || last_die->tag == DW_TAG_interface_type
8026 || last_die->tag == DW_TAG_structure_type
8027 || last_die->tag == DW_TAG_union_type))
8028 || (cu->language == language_ada
8029 && (last_die->tag == DW_TAG_subprogram
8030 || last_die->tag == DW_TAG_lexical_block))))
8033 parent_die = last_die;
8037 /* Otherwise we skip to the next sibling, if any. */
8038 info_ptr = locate_pdi_sibling (last_die, buffer, info_ptr, abfd, cu);
8040 /* Back to the top, do it again. */
8044 /* Read a minimal amount of information into the minimal die structure. */
8047 read_partial_die (struct partial_die_info *part_die,
8048 struct abbrev_info *abbrev,
8049 unsigned int abbrev_len, bfd *abfd,
8050 gdb_byte *buffer, gdb_byte *info_ptr,
8051 struct dwarf2_cu *cu)
8054 struct attribute attr;
8055 int has_low_pc_attr = 0;
8056 int has_high_pc_attr = 0;
8058 memset (part_die, 0, sizeof (struct partial_die_info));
8060 part_die->offset = info_ptr - buffer;
8062 info_ptr += abbrev_len;
8067 part_die->tag = abbrev->tag;
8068 part_die->has_children = abbrev->has_children;
8070 for (i = 0; i < abbrev->num_attrs; ++i)
8072 info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu);
8074 /* Store the data if it is of an attribute we want to keep in a
8075 partial symbol table. */
8079 switch (part_die->tag)
8081 case DW_TAG_compile_unit:
8082 case DW_TAG_type_unit:
8083 /* Compilation units have a DW_AT_name that is a filename, not
8084 a source language identifier. */
8085 case DW_TAG_enumeration_type:
8086 case DW_TAG_enumerator:
8087 /* These tags always have simple identifiers already; no need
8088 to canonicalize them. */
8089 part_die->name = DW_STRING (&attr);
8093 = dwarf2_canonicalize_name (DW_STRING (&attr), cu,
8094 &cu->objfile->objfile_obstack);
8098 case DW_AT_linkage_name:
8099 case DW_AT_MIPS_linkage_name:
8100 /* Note that both forms of linkage name might appear. We
8101 assume they will be the same, and we only store the last
8103 if (cu->language == language_ada)
8104 part_die->name = DW_STRING (&attr);
8107 has_low_pc_attr = 1;
8108 part_die->lowpc = DW_ADDR (&attr);
8111 has_high_pc_attr = 1;
8112 part_die->highpc = DW_ADDR (&attr);
8114 case DW_AT_location:
8115 /* Support the .debug_loc offsets */
8116 if (attr_form_is_block (&attr))
8118 part_die->locdesc = DW_BLOCK (&attr);
8120 else if (attr_form_is_section_offset (&attr))
8122 dwarf2_complex_location_expr_complaint ();
8126 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
8127 "partial symbol information");
8130 case DW_AT_external:
8131 part_die->is_external = DW_UNSND (&attr);
8133 case DW_AT_declaration:
8134 part_die->is_declaration = DW_UNSND (&attr);
8137 part_die->has_type = 1;
8139 case DW_AT_abstract_origin:
8140 case DW_AT_specification:
8141 case DW_AT_extension:
8142 part_die->has_specification = 1;
8143 part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
8146 /* Ignore absolute siblings, they might point outside of
8147 the current compile unit. */
8148 if (attr.form == DW_FORM_ref_addr)
8149 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
8151 part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr);
8153 case DW_AT_byte_size:
8154 part_die->has_byte_size = 1;
8156 case DW_AT_calling_convention:
8157 /* DWARF doesn't provide a way to identify a program's source-level
8158 entry point. DW_AT_calling_convention attributes are only meant
8159 to describe functions' calling conventions.
8161 However, because it's a necessary piece of information in
8162 Fortran, and because DW_CC_program is the only piece of debugging
8163 information whose definition refers to a 'main program' at all,
8164 several compilers have begun marking Fortran main programs with
8165 DW_CC_program --- even when those functions use the standard
8166 calling conventions.
8168 So until DWARF specifies a way to provide this information and
8169 compilers pick up the new representation, we'll support this
8171 if (DW_UNSND (&attr) == DW_CC_program
8172 && cu->language == language_fortran)
8173 set_main_name (part_die->name);
8180 /* When using the GNU linker, .gnu.linkonce. sections are used to
8181 eliminate duplicate copies of functions and vtables and such.
8182 The linker will arbitrarily choose one and discard the others.
8183 The AT_*_pc values for such functions refer to local labels in
8184 these sections. If the section from that file was discarded, the
8185 labels are not in the output, so the relocs get a value of 0.
8186 If this is a discarded function, mark the pc bounds as invalid,
8187 so that GDB will ignore it. */
8188 if (has_low_pc_attr && has_high_pc_attr
8189 && part_die->lowpc < part_die->highpc
8190 && (part_die->lowpc != 0
8191 || dwarf2_per_objfile->has_section_at_zero))
8192 part_die->has_pc_info = 1;
8197 /* Find a cached partial DIE at OFFSET in CU. */
8199 static struct partial_die_info *
8200 find_partial_die_in_comp_unit (unsigned int offset, struct dwarf2_cu *cu)
8202 struct partial_die_info *lookup_die = NULL;
8203 struct partial_die_info part_die;
8205 part_die.offset = offset;
8206 lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset);
8211 /* Find a partial DIE at OFFSET, which may or may not be in CU,
8212 except in the case of .debug_types DIEs which do not reference
8213 outside their CU (they do however referencing other types via
8216 static struct partial_die_info *
8217 find_partial_die (unsigned int offset, struct dwarf2_cu *cu)
8219 struct dwarf2_per_cu_data *per_cu = NULL;
8220 struct partial_die_info *pd = NULL;
8222 if (cu->per_cu->from_debug_types)
8224 pd = find_partial_die_in_comp_unit (offset, cu);
8230 if (offset_in_cu_p (&cu->header, offset))
8232 pd = find_partial_die_in_comp_unit (offset, cu);
8237 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
8239 if (per_cu->cu == NULL)
8241 load_partial_comp_unit (per_cu, cu->objfile);
8242 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
8243 dwarf2_per_objfile->read_in_chain = per_cu;
8246 per_cu->cu->last_used = 0;
8247 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
8249 if (pd == NULL && per_cu->load_all_dies == 0)
8251 struct cleanup *back_to;
8252 struct partial_die_info comp_unit_die;
8253 struct abbrev_info *abbrev;
8254 unsigned int bytes_read;
8257 per_cu->load_all_dies = 1;
8259 /* Re-read the DIEs. */
8260 back_to = make_cleanup (null_cleanup, 0);
8261 if (per_cu->cu->dwarf2_abbrevs == NULL)
8263 dwarf2_read_abbrevs (per_cu->cu->objfile->obfd, per_cu->cu);
8264 make_cleanup (dwarf2_free_abbrev_table, per_cu->cu);
8266 info_ptr = (dwarf2_per_objfile->info.buffer
8267 + per_cu->cu->header.offset
8268 + per_cu->cu->header.first_die_offset);
8269 abbrev = peek_die_abbrev (info_ptr, &bytes_read, per_cu->cu);
8270 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
8271 per_cu->cu->objfile->obfd,
8272 dwarf2_per_objfile->info.buffer, info_ptr,
8274 if (comp_unit_die.has_children)
8275 load_partial_dies (per_cu->cu->objfile->obfd,
8276 dwarf2_per_objfile->info.buffer, info_ptr,
8278 do_cleanups (back_to);
8280 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
8286 internal_error (__FILE__, __LINE__,
8287 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
8288 offset, bfd_get_filename (cu->objfile->obfd));
8292 /* Adjust PART_DIE before generating a symbol for it. This function
8293 may set the is_external flag or change the DIE's name. */
8296 fixup_partial_die (struct partial_die_info *part_die,
8297 struct dwarf2_cu *cu)
8299 /* If we found a reference attribute and the DIE has no name, try
8300 to find a name in the referred to DIE. */
8302 if (part_die->name == NULL && part_die->has_specification)
8304 struct partial_die_info *spec_die;
8306 spec_die = find_partial_die (part_die->spec_offset, cu);
8308 fixup_partial_die (spec_die, cu);
8312 part_die->name = spec_die->name;
8314 /* Copy DW_AT_external attribute if it is set. */
8315 if (spec_die->is_external)
8316 part_die->is_external = spec_die->is_external;
8320 /* Set default names for some unnamed DIEs. */
8321 if (part_die->name == NULL && (part_die->tag == DW_TAG_structure_type
8322 || part_die->tag == DW_TAG_class_type))
8323 part_die->name = "(anonymous class)";
8325 if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
8326 part_die->name = "(anonymous namespace)";
8328 if (part_die->tag == DW_TAG_structure_type
8329 || part_die->tag == DW_TAG_class_type
8330 || part_die->tag == DW_TAG_union_type)
8331 guess_structure_name (part_die, cu);
8334 /* Read an attribute value described by an attribute form. */
8337 read_attribute_value (struct attribute *attr, unsigned form,
8338 bfd *abfd, gdb_byte *info_ptr,
8339 struct dwarf2_cu *cu)
8341 struct comp_unit_head *cu_header = &cu->header;
8342 unsigned int bytes_read;
8343 struct dwarf_block *blk;
8348 case DW_FORM_ref_addr:
8349 if (cu->header.version == 2)
8350 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
8352 DW_ADDR (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
8353 info_ptr += bytes_read;
8356 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
8357 info_ptr += bytes_read;
8359 case DW_FORM_block2:
8360 blk = dwarf_alloc_block (cu);
8361 blk->size = read_2_bytes (abfd, info_ptr);
8363 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
8364 info_ptr += blk->size;
8365 DW_BLOCK (attr) = blk;
8367 case DW_FORM_block4:
8368 blk = dwarf_alloc_block (cu);
8369 blk->size = read_4_bytes (abfd, info_ptr);
8371 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
8372 info_ptr += blk->size;
8373 DW_BLOCK (attr) = blk;
8376 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
8380 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
8384 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
8387 case DW_FORM_sec_offset:
8388 DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
8389 info_ptr += bytes_read;
8391 case DW_FORM_string:
8392 DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
8393 DW_STRING_IS_CANONICAL (attr) = 0;
8394 info_ptr += bytes_read;
8397 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
8399 DW_STRING_IS_CANONICAL (attr) = 0;
8400 info_ptr += bytes_read;
8402 case DW_FORM_exprloc:
8404 blk = dwarf_alloc_block (cu);
8405 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
8406 info_ptr += bytes_read;
8407 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
8408 info_ptr += blk->size;
8409 DW_BLOCK (attr) = blk;
8411 case DW_FORM_block1:
8412 blk = dwarf_alloc_block (cu);
8413 blk->size = read_1_byte (abfd, info_ptr);
8415 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
8416 info_ptr += blk->size;
8417 DW_BLOCK (attr) = blk;
8420 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
8424 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
8427 case DW_FORM_flag_present:
8428 DW_UNSND (attr) = 1;
8431 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
8432 info_ptr += bytes_read;
8435 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
8436 info_ptr += bytes_read;
8439 DW_ADDR (attr) = cu->header.offset + read_1_byte (abfd, info_ptr);
8443 DW_ADDR (attr) = cu->header.offset + read_2_bytes (abfd, info_ptr);
8447 DW_ADDR (attr) = cu->header.offset + read_4_bytes (abfd, info_ptr);
8451 DW_ADDR (attr) = cu->header.offset + read_8_bytes (abfd, info_ptr);
8455 /* Convert the signature to something we can record in DW_UNSND
8457 NOTE: This is NULL if the type wasn't found. */
8458 DW_SIGNATURED_TYPE (attr) =
8459 lookup_signatured_type (cu->objfile, read_8_bytes (abfd, info_ptr));
8462 case DW_FORM_ref_udata:
8463 DW_ADDR (attr) = (cu->header.offset
8464 + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
8465 info_ptr += bytes_read;
8467 case DW_FORM_indirect:
8468 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
8469 info_ptr += bytes_read;
8470 info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu);
8473 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
8474 dwarf_form_name (form),
8475 bfd_get_filename (abfd));
8478 /* We have seen instances where the compiler tried to emit a byte
8479 size attribute of -1 which ended up being encoded as an unsigned
8480 0xffffffff. Although 0xffffffff is technically a valid size value,
8481 an object of this size seems pretty unlikely so we can relatively
8482 safely treat these cases as if the size attribute was invalid and
8483 treat them as zero by default. */
8484 if (attr->name == DW_AT_byte_size
8485 && form == DW_FORM_data4
8486 && DW_UNSND (attr) >= 0xffffffff)
8489 (&symfile_complaints,
8490 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
8491 hex_string (DW_UNSND (attr)));
8492 DW_UNSND (attr) = 0;
8498 /* Read an attribute described by an abbreviated attribute. */
8501 read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
8502 bfd *abfd, gdb_byte *info_ptr, struct dwarf2_cu *cu)
8504 attr->name = abbrev->name;
8505 return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu);
8508 /* read dwarf information from a buffer */
8511 read_1_byte (bfd *abfd, gdb_byte *buf)
8513 return bfd_get_8 (abfd, buf);
8517 read_1_signed_byte (bfd *abfd, gdb_byte *buf)
8519 return bfd_get_signed_8 (abfd, buf);
8523 read_2_bytes (bfd *abfd, gdb_byte *buf)
8525 return bfd_get_16 (abfd, buf);
8529 read_2_signed_bytes (bfd *abfd, gdb_byte *buf)
8531 return bfd_get_signed_16 (abfd, buf);
8535 read_4_bytes (bfd *abfd, gdb_byte *buf)
8537 return bfd_get_32 (abfd, buf);
8541 read_4_signed_bytes (bfd *abfd, gdb_byte *buf)
8543 return bfd_get_signed_32 (abfd, buf);
8547 read_8_bytes (bfd *abfd, gdb_byte *buf)
8549 return bfd_get_64 (abfd, buf);
8553 read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
8554 unsigned int *bytes_read)
8556 struct comp_unit_head *cu_header = &cu->header;
8557 CORE_ADDR retval = 0;
8559 if (cu_header->signed_addr_p)
8561 switch (cu_header->addr_size)
8564 retval = bfd_get_signed_16 (abfd, buf);
8567 retval = bfd_get_signed_32 (abfd, buf);
8570 retval = bfd_get_signed_64 (abfd, buf);
8573 internal_error (__FILE__, __LINE__,
8574 _("read_address: bad switch, signed [in module %s]"),
8575 bfd_get_filename (abfd));
8580 switch (cu_header->addr_size)
8583 retval = bfd_get_16 (abfd, buf);
8586 retval = bfd_get_32 (abfd, buf);
8589 retval = bfd_get_64 (abfd, buf);
8592 internal_error (__FILE__, __LINE__,
8593 _("read_address: bad switch, unsigned [in module %s]"),
8594 bfd_get_filename (abfd));
8598 *bytes_read = cu_header->addr_size;
8602 /* Read the initial length from a section. The (draft) DWARF 3
8603 specification allows the initial length to take up either 4 bytes
8604 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
8605 bytes describe the length and all offsets will be 8 bytes in length
8608 An older, non-standard 64-bit format is also handled by this
8609 function. The older format in question stores the initial length
8610 as an 8-byte quantity without an escape value. Lengths greater
8611 than 2^32 aren't very common which means that the initial 4 bytes
8612 is almost always zero. Since a length value of zero doesn't make
8613 sense for the 32-bit format, this initial zero can be considered to
8614 be an escape value which indicates the presence of the older 64-bit
8615 format. As written, the code can't detect (old format) lengths
8616 greater than 4GB. If it becomes necessary to handle lengths
8617 somewhat larger than 4GB, we could allow other small values (such
8618 as the non-sensical values of 1, 2, and 3) to also be used as
8619 escape values indicating the presence of the old format.
8621 The value returned via bytes_read should be used to increment the
8622 relevant pointer after calling read_initial_length().
8624 [ Note: read_initial_length() and read_offset() are based on the
8625 document entitled "DWARF Debugging Information Format", revision
8626 3, draft 8, dated November 19, 2001. This document was obtained
8629 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
8631 This document is only a draft and is subject to change. (So beware.)
8633 Details regarding the older, non-standard 64-bit format were
8634 determined empirically by examining 64-bit ELF files produced by
8635 the SGI toolchain on an IRIX 6.5 machine.
8637 - Kevin, July 16, 2002
8641 read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read)
8643 LONGEST length = bfd_get_32 (abfd, buf);
8645 if (length == 0xffffffff)
8647 length = bfd_get_64 (abfd, buf + 4);
8650 else if (length == 0)
8652 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
8653 length = bfd_get_64 (abfd, buf);
8664 /* Cover function for read_initial_length.
8665 Returns the length of the object at BUF, and stores the size of the
8666 initial length in *BYTES_READ and stores the size that offsets will be in
8668 If the initial length size is not equivalent to that specified in
8669 CU_HEADER then issue a complaint.
8670 This is useful when reading non-comp-unit headers. */
8673 read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf,
8674 const struct comp_unit_head *cu_header,
8675 unsigned int *bytes_read,
8676 unsigned int *offset_size)
8678 LONGEST length = read_initial_length (abfd, buf, bytes_read);
8680 gdb_assert (cu_header->initial_length_size == 4
8681 || cu_header->initial_length_size == 8
8682 || cu_header->initial_length_size == 12);
8684 if (cu_header->initial_length_size != *bytes_read)
8685 complaint (&symfile_complaints,
8686 _("intermixed 32-bit and 64-bit DWARF sections"));
8688 *offset_size = (*bytes_read == 4) ? 4 : 8;
8692 /* Read an offset from the data stream. The size of the offset is
8693 given by cu_header->offset_size. */
8696 read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
8697 unsigned int *bytes_read)
8699 LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size);
8701 *bytes_read = cu_header->offset_size;
8705 /* Read an offset from the data stream. */
8708 read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size)
8712 switch (offset_size)
8715 retval = bfd_get_32 (abfd, buf);
8718 retval = bfd_get_64 (abfd, buf);
8721 internal_error (__FILE__, __LINE__,
8722 _("read_offset_1: bad switch [in module %s]"),
8723 bfd_get_filename (abfd));
8730 read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
8732 /* If the size of a host char is 8 bits, we can return a pointer
8733 to the buffer, otherwise we have to copy the data to a buffer
8734 allocated on the temporary obstack. */
8735 gdb_assert (HOST_CHAR_BIT == 8);
8740 read_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
8742 /* If the size of a host char is 8 bits, we can return a pointer
8743 to the string, otherwise we have to copy the string to a buffer
8744 allocated on the temporary obstack. */
8745 gdb_assert (HOST_CHAR_BIT == 8);
8748 *bytes_read_ptr = 1;
8751 *bytes_read_ptr = strlen ((char *) buf) + 1;
8752 return (char *) buf;
8756 read_indirect_string (bfd *abfd, gdb_byte *buf,
8757 const struct comp_unit_head *cu_header,
8758 unsigned int *bytes_read_ptr)
8760 LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr);
8762 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str);
8763 if (dwarf2_per_objfile->str.buffer == NULL)
8765 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
8766 bfd_get_filename (abfd));
8769 if (str_offset >= dwarf2_per_objfile->str.size)
8771 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
8772 bfd_get_filename (abfd));
8775 gdb_assert (HOST_CHAR_BIT == 8);
8776 if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
8778 return (char *) (dwarf2_per_objfile->str.buffer + str_offset);
8781 static unsigned long
8782 read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
8784 unsigned long result;
8785 unsigned int num_read;
8795 byte = bfd_get_8 (abfd, buf);
8798 result |= ((unsigned long)(byte & 127) << shift);
8799 if ((byte & 128) == 0)
8805 *bytes_read_ptr = num_read;
8810 read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
8813 int i, shift, num_read;
8822 byte = bfd_get_8 (abfd, buf);
8825 result |= ((long)(byte & 127) << shift);
8827 if ((byte & 128) == 0)
8832 if ((shift < 8 * sizeof (result)) && (byte & 0x40))
8833 result |= -(((long)1) << shift);
8834 *bytes_read_ptr = num_read;
8838 /* Return a pointer to just past the end of an LEB128 number in BUF. */
8841 skip_leb128 (bfd *abfd, gdb_byte *buf)
8847 byte = bfd_get_8 (abfd, buf);
8849 if ((byte & 128) == 0)
8855 set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
8862 cu->language = language_c;
8864 case DW_LANG_C_plus_plus:
8865 cu->language = language_cplus;
8868 cu->language = language_d;
8870 case DW_LANG_Fortran77:
8871 case DW_LANG_Fortran90:
8872 case DW_LANG_Fortran95:
8873 cu->language = language_fortran;
8875 case DW_LANG_Mips_Assembler:
8876 cu->language = language_asm;
8879 cu->language = language_java;
8883 cu->language = language_ada;
8885 case DW_LANG_Modula2:
8886 cu->language = language_m2;
8888 case DW_LANG_Pascal83:
8889 cu->language = language_pascal;
8892 cu->language = language_objc;
8894 case DW_LANG_Cobol74:
8895 case DW_LANG_Cobol85:
8897 cu->language = language_minimal;
8900 cu->language_defn = language_def (cu->language);
8903 /* Return the named attribute or NULL if not there. */
8905 static struct attribute *
8906 dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
8909 struct attribute *spec = NULL;
8911 for (i = 0; i < die->num_attrs; ++i)
8913 if (die->attrs[i].name == name)
8914 return &die->attrs[i];
8915 if (die->attrs[i].name == DW_AT_specification
8916 || die->attrs[i].name == DW_AT_abstract_origin)
8917 spec = &die->attrs[i];
8922 die = follow_die_ref (die, spec, &cu);
8923 return dwarf2_attr (die, name, cu);
8929 /* Return the named attribute or NULL if not there,
8930 but do not follow DW_AT_specification, etc.
8931 This is for use in contexts where we're reading .debug_types dies.
8932 Following DW_AT_specification, DW_AT_abstract_origin will take us
8933 back up the chain, and we want to go down. */
8935 static struct attribute *
8936 dwarf2_attr_no_follow (struct die_info *die, unsigned int name,
8937 struct dwarf2_cu *cu)
8941 for (i = 0; i < die->num_attrs; ++i)
8942 if (die->attrs[i].name == name)
8943 return &die->attrs[i];
8948 /* Return non-zero iff the attribute NAME is defined for the given DIE,
8949 and holds a non-zero value. This function should only be used for
8950 DW_FORM_flag or DW_FORM_flag_present attributes. */
8953 dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
8955 struct attribute *attr = dwarf2_attr (die, name, cu);
8957 return (attr && DW_UNSND (attr));
8961 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
8963 /* A DIE is a declaration if it has a DW_AT_declaration attribute
8964 which value is non-zero. However, we have to be careful with
8965 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
8966 (via dwarf2_flag_true_p) follows this attribute. So we may
8967 end up accidently finding a declaration attribute that belongs
8968 to a different DIE referenced by the specification attribute,
8969 even though the given DIE does not have a declaration attribute. */
8970 return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
8971 && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
8974 /* Return the die giving the specification for DIE, if there is
8975 one. *SPEC_CU is the CU containing DIE on input, and the CU
8976 containing the return value on output. If there is no
8977 specification, but there is an abstract origin, that is
8980 static struct die_info *
8981 die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
8983 struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
8986 if (spec_attr == NULL)
8987 spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu);
8989 if (spec_attr == NULL)
8992 return follow_die_ref (die, spec_attr, spec_cu);
8995 /* Free the line_header structure *LH, and any arrays and strings it
8998 free_line_header (struct line_header *lh)
9000 if (lh->standard_opcode_lengths)
9001 xfree (lh->standard_opcode_lengths);
9003 /* Remember that all the lh->file_names[i].name pointers are
9004 pointers into debug_line_buffer, and don't need to be freed. */
9006 xfree (lh->file_names);
9008 /* Similarly for the include directory names. */
9009 if (lh->include_dirs)
9010 xfree (lh->include_dirs);
9016 /* Add an entry to LH's include directory table. */
9018 add_include_dir (struct line_header *lh, char *include_dir)
9020 /* Grow the array if necessary. */
9021 if (lh->include_dirs_size == 0)
9023 lh->include_dirs_size = 1; /* for testing */
9024 lh->include_dirs = xmalloc (lh->include_dirs_size
9025 * sizeof (*lh->include_dirs));
9027 else if (lh->num_include_dirs >= lh->include_dirs_size)
9029 lh->include_dirs_size *= 2;
9030 lh->include_dirs = xrealloc (lh->include_dirs,
9031 (lh->include_dirs_size
9032 * sizeof (*lh->include_dirs)));
9035 lh->include_dirs[lh->num_include_dirs++] = include_dir;
9039 /* Add an entry to LH's file name table. */
9041 add_file_name (struct line_header *lh,
9043 unsigned int dir_index,
9044 unsigned int mod_time,
9045 unsigned int length)
9047 struct file_entry *fe;
9049 /* Grow the array if necessary. */
9050 if (lh->file_names_size == 0)
9052 lh->file_names_size = 1; /* for testing */
9053 lh->file_names = xmalloc (lh->file_names_size
9054 * sizeof (*lh->file_names));
9056 else if (lh->num_file_names >= lh->file_names_size)
9058 lh->file_names_size *= 2;
9059 lh->file_names = xrealloc (lh->file_names,
9060 (lh->file_names_size
9061 * sizeof (*lh->file_names)));
9064 fe = &lh->file_names[lh->num_file_names++];
9066 fe->dir_index = dir_index;
9067 fe->mod_time = mod_time;
9068 fe->length = length;
9074 /* Read the statement program header starting at OFFSET in
9075 .debug_line, according to the endianness of ABFD. Return a pointer
9076 to a struct line_header, allocated using xmalloc.
9078 NOTE: the strings in the include directory and file name tables of
9079 the returned object point into debug_line_buffer, and must not be
9081 static struct line_header *
9082 dwarf_decode_line_header (unsigned int offset, bfd *abfd,
9083 struct dwarf2_cu *cu)
9085 struct cleanup *back_to;
9086 struct line_header *lh;
9088 unsigned int bytes_read, offset_size;
9090 char *cur_dir, *cur_file;
9092 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->line);
9093 if (dwarf2_per_objfile->line.buffer == NULL)
9095 complaint (&symfile_complaints, _("missing .debug_line section"));
9099 /* Make sure that at least there's room for the total_length field.
9100 That could be 12 bytes long, but we're just going to fudge that. */
9101 if (offset + 4 >= dwarf2_per_objfile->line.size)
9103 dwarf2_statement_list_fits_in_line_number_section_complaint ();
9107 lh = xmalloc (sizeof (*lh));
9108 memset (lh, 0, sizeof (*lh));
9109 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
9112 line_ptr = dwarf2_per_objfile->line.buffer + offset;
9114 /* Read in the header. */
9116 read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header,
9117 &bytes_read, &offset_size);
9118 line_ptr += bytes_read;
9119 if (line_ptr + lh->total_length > (dwarf2_per_objfile->line.buffer
9120 + dwarf2_per_objfile->line.size))
9122 dwarf2_statement_list_fits_in_line_number_section_complaint ();
9125 lh->statement_program_end = line_ptr + lh->total_length;
9126 lh->version = read_2_bytes (abfd, line_ptr);
9128 lh->header_length = read_offset_1 (abfd, line_ptr, offset_size);
9129 line_ptr += offset_size;
9130 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
9132 if (lh->version >= 4)
9134 lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr);
9138 lh->maximum_ops_per_instruction = 1;
9140 if (lh->maximum_ops_per_instruction == 0)
9142 lh->maximum_ops_per_instruction = 1;
9143 complaint (&symfile_complaints,
9144 _("invalid maximum_ops_per_instruction in `.debug_line' section"));
9147 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
9149 lh->line_base = read_1_signed_byte (abfd, line_ptr);
9151 lh->line_range = read_1_byte (abfd, line_ptr);
9153 lh->opcode_base = read_1_byte (abfd, line_ptr);
9155 lh->standard_opcode_lengths
9156 = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
9158 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
9159 for (i = 1; i < lh->opcode_base; ++i)
9161 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
9165 /* Read directory table. */
9166 while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
9168 line_ptr += bytes_read;
9169 add_include_dir (lh, cur_dir);
9171 line_ptr += bytes_read;
9173 /* Read file name table. */
9174 while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
9176 unsigned int dir_index, mod_time, length;
9178 line_ptr += bytes_read;
9179 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
9180 line_ptr += bytes_read;
9181 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
9182 line_ptr += bytes_read;
9183 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
9184 line_ptr += bytes_read;
9186 add_file_name (lh, cur_file, dir_index, mod_time, length);
9188 line_ptr += bytes_read;
9189 lh->statement_program_start = line_ptr;
9191 if (line_ptr > (dwarf2_per_objfile->line.buffer
9192 + dwarf2_per_objfile->line.size))
9193 complaint (&symfile_complaints,
9194 _("line number info header doesn't fit in `.debug_line' section"));
9196 discard_cleanups (back_to);
9200 /* This function exists to work around a bug in certain compilers
9201 (particularly GCC 2.95), in which the first line number marker of a
9202 function does not show up until after the prologue, right before
9203 the second line number marker. This function shifts ADDRESS down
9204 to the beginning of the function if necessary, and is called on
9205 addresses passed to record_line. */
9208 check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu)
9210 struct function_range *fn;
9212 /* Find the function_range containing address. */
9217 cu->cached_fn = cu->first_fn;
9221 if (fn->lowpc <= address && fn->highpc > address)
9227 while (fn && fn != cu->cached_fn)
9228 if (fn->lowpc <= address && fn->highpc > address)
9238 if (address != fn->lowpc)
9239 complaint (&symfile_complaints,
9240 _("misplaced first line number at 0x%lx for '%s'"),
9241 (unsigned long) address, fn->name);
9246 /* Decode the Line Number Program (LNP) for the given line_header
9247 structure and CU. The actual information extracted and the type
9248 of structures created from the LNP depends on the value of PST.
9250 1. If PST is NULL, then this procedure uses the data from the program
9251 to create all necessary symbol tables, and their linetables.
9252 The compilation directory of the file is passed in COMP_DIR,
9253 and must not be NULL.
9255 2. If PST is not NULL, this procedure reads the program to determine
9256 the list of files included by the unit represented by PST, and
9257 builds all the associated partial symbol tables. In this case,
9258 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
9259 is not used to compute the full name of the symtab, and therefore
9260 omitting it when building the partial symtab does not introduce
9261 the potential for inconsistency - a partial symtab and its associated
9262 symbtab having a different fullname -). */
9265 dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd,
9266 struct dwarf2_cu *cu, struct partial_symtab *pst)
9268 gdb_byte *line_ptr, *extended_end;
9270 unsigned int bytes_read, extended_len;
9271 unsigned char op_code, extended_op, adj_opcode;
9273 struct objfile *objfile = cu->objfile;
9274 struct gdbarch *gdbarch = get_objfile_arch (objfile);
9275 const int decode_for_pst_p = (pst != NULL);
9276 struct subfile *last_subfile = NULL, *first_subfile = current_subfile;
9278 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
9280 line_ptr = lh->statement_program_start;
9281 line_end = lh->statement_program_end;
9283 /* Read the statement sequences until there's nothing left. */
9284 while (line_ptr < line_end)
9286 /* state machine registers */
9287 CORE_ADDR address = 0;
9288 unsigned int file = 1;
9289 unsigned int line = 1;
9290 unsigned int column = 0;
9291 int is_stmt = lh->default_is_stmt;
9292 int basic_block = 0;
9293 int end_sequence = 0;
9295 unsigned char op_index = 0;
9297 if (!decode_for_pst_p && lh->num_file_names >= file)
9299 /* Start a subfile for the current file of the state machine. */
9300 /* lh->include_dirs and lh->file_names are 0-based, but the
9301 directory and file name numbers in the statement program
9303 struct file_entry *fe = &lh->file_names[file - 1];
9307 dir = lh->include_dirs[fe->dir_index - 1];
9309 dwarf2_start_subfile (fe->name, dir, comp_dir);
9312 /* Decode the table. */
9313 while (!end_sequence)
9315 op_code = read_1_byte (abfd, line_ptr);
9317 if (line_ptr > line_end)
9319 dwarf2_debug_line_missing_end_sequence_complaint ();
9323 if (op_code >= lh->opcode_base)
9325 /* Special operand. */
9326 adj_opcode = op_code - lh->opcode_base;
9327 address += (((op_index + (adj_opcode / lh->line_range))
9328 / lh->maximum_ops_per_instruction)
9329 * lh->minimum_instruction_length);
9330 op_index = ((op_index + (adj_opcode / lh->line_range))
9331 % lh->maximum_ops_per_instruction);
9332 line += lh->line_base + (adj_opcode % lh->line_range);
9333 if (lh->num_file_names < file || file == 0)
9334 dwarf2_debug_line_missing_file_complaint ();
9335 /* For now we ignore lines not starting on an
9336 instruction boundary. */
9337 else if (op_index == 0)
9339 lh->file_names[file - 1].included_p = 1;
9340 if (!decode_for_pst_p && is_stmt)
9342 if (last_subfile != current_subfile)
9344 addr = gdbarch_addr_bits_remove (gdbarch, address);
9346 record_line (last_subfile, 0, addr);
9347 last_subfile = current_subfile;
9349 /* Append row to matrix using current values. */
9350 addr = check_cu_functions (address, cu);
9351 addr = gdbarch_addr_bits_remove (gdbarch, addr);
9352 record_line (current_subfile, line, addr);
9357 else switch (op_code)
9359 case DW_LNS_extended_op:
9360 extended_len = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
9361 line_ptr += bytes_read;
9362 extended_end = line_ptr + extended_len;
9363 extended_op = read_1_byte (abfd, line_ptr);
9365 switch (extended_op)
9367 case DW_LNE_end_sequence:
9370 case DW_LNE_set_address:
9371 address = read_address (abfd, line_ptr, cu, &bytes_read);
9373 line_ptr += bytes_read;
9374 address += baseaddr;
9376 case DW_LNE_define_file:
9379 unsigned int dir_index, mod_time, length;
9381 cur_file = read_string (abfd, line_ptr, &bytes_read);
9382 line_ptr += bytes_read;
9384 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
9385 line_ptr += bytes_read;
9387 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
9388 line_ptr += bytes_read;
9390 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
9391 line_ptr += bytes_read;
9392 add_file_name (lh, cur_file, dir_index, mod_time, length);
9395 case DW_LNE_set_discriminator:
9396 /* The discriminator is not interesting to the debugger;
9398 line_ptr = extended_end;
9401 complaint (&symfile_complaints,
9402 _("mangled .debug_line section"));
9405 /* Make sure that we parsed the extended op correctly. If e.g.
9406 we expected a different address size than the producer used,
9407 we may have read the wrong number of bytes. */
9408 if (line_ptr != extended_end)
9410 complaint (&symfile_complaints,
9411 _("mangled .debug_line section"));
9416 if (lh->num_file_names < file || file == 0)
9417 dwarf2_debug_line_missing_file_complaint ();
9420 lh->file_names[file - 1].included_p = 1;
9421 if (!decode_for_pst_p && is_stmt)
9423 if (last_subfile != current_subfile)
9425 addr = gdbarch_addr_bits_remove (gdbarch, address);
9427 record_line (last_subfile, 0, addr);
9428 last_subfile = current_subfile;
9430 addr = check_cu_functions (address, cu);
9431 addr = gdbarch_addr_bits_remove (gdbarch, addr);
9432 record_line (current_subfile, line, addr);
9437 case DW_LNS_advance_pc:
9440 = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
9442 address += (((op_index + adjust)
9443 / lh->maximum_ops_per_instruction)
9444 * lh->minimum_instruction_length);
9445 op_index = ((op_index + adjust)
9446 % lh->maximum_ops_per_instruction);
9447 line_ptr += bytes_read;
9450 case DW_LNS_advance_line:
9451 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
9452 line_ptr += bytes_read;
9454 case DW_LNS_set_file:
9456 /* The arrays lh->include_dirs and lh->file_names are
9457 0-based, but the directory and file name numbers in
9458 the statement program are 1-based. */
9459 struct file_entry *fe;
9462 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
9463 line_ptr += bytes_read;
9464 if (lh->num_file_names < file || file == 0)
9465 dwarf2_debug_line_missing_file_complaint ();
9468 fe = &lh->file_names[file - 1];
9470 dir = lh->include_dirs[fe->dir_index - 1];
9471 if (!decode_for_pst_p)
9473 last_subfile = current_subfile;
9474 dwarf2_start_subfile (fe->name, dir, comp_dir);
9479 case DW_LNS_set_column:
9480 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
9481 line_ptr += bytes_read;
9483 case DW_LNS_negate_stmt:
9484 is_stmt = (!is_stmt);
9486 case DW_LNS_set_basic_block:
9489 /* Add to the address register of the state machine the
9490 address increment value corresponding to special opcode
9491 255. I.e., this value is scaled by the minimum
9492 instruction length since special opcode 255 would have
9493 scaled the the increment. */
9494 case DW_LNS_const_add_pc:
9496 CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range;
9498 address += (((op_index + adjust)
9499 / lh->maximum_ops_per_instruction)
9500 * lh->minimum_instruction_length);
9501 op_index = ((op_index + adjust)
9502 % lh->maximum_ops_per_instruction);
9505 case DW_LNS_fixed_advance_pc:
9506 address += read_2_bytes (abfd, line_ptr);
9512 /* Unknown standard opcode, ignore it. */
9515 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
9517 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
9518 line_ptr += bytes_read;
9523 if (lh->num_file_names < file || file == 0)
9524 dwarf2_debug_line_missing_file_complaint ();
9527 lh->file_names[file - 1].included_p = 1;
9528 if (!decode_for_pst_p)
9530 addr = gdbarch_addr_bits_remove (gdbarch, address);
9531 record_line (current_subfile, 0, addr);
9536 if (decode_for_pst_p)
9540 /* Now that we're done scanning the Line Header Program, we can
9541 create the psymtab of each included file. */
9542 for (file_index = 0; file_index < lh->num_file_names; file_index++)
9543 if (lh->file_names[file_index].included_p == 1)
9545 const struct file_entry fe = lh->file_names [file_index];
9546 char *include_name = fe.name;
9547 char *dir_name = NULL;
9548 char *pst_filename = pst->filename;
9551 dir_name = lh->include_dirs[fe.dir_index - 1];
9553 if (!IS_ABSOLUTE_PATH (include_name) && dir_name != NULL)
9555 include_name = concat (dir_name, SLASH_STRING,
9556 include_name, (char *)NULL);
9557 make_cleanup (xfree, include_name);
9560 if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
9562 pst_filename = concat (pst->dirname, SLASH_STRING,
9563 pst_filename, (char *)NULL);
9564 make_cleanup (xfree, pst_filename);
9567 if (strcmp (include_name, pst_filename) != 0)
9568 dwarf2_create_include_psymtab (include_name, pst, objfile);
9573 /* Make sure a symtab is created for every file, even files
9574 which contain only variables (i.e. no code with associated
9578 struct file_entry *fe;
9580 for (i = 0; i < lh->num_file_names; i++)
9584 fe = &lh->file_names[i];
9586 dir = lh->include_dirs[fe->dir_index - 1];
9587 dwarf2_start_subfile (fe->name, dir, comp_dir);
9589 /* Skip the main file; we don't need it, and it must be
9590 allocated last, so that it will show up before the
9591 non-primary symtabs in the objfile's symtab list. */
9592 if (current_subfile == first_subfile)
9595 if (current_subfile->symtab == NULL)
9596 current_subfile->symtab = allocate_symtab (current_subfile->name,
9598 fe->symtab = current_subfile->symtab;
9603 /* Start a subfile for DWARF. FILENAME is the name of the file and
9604 DIRNAME the name of the source directory which contains FILENAME
9605 or NULL if not known. COMP_DIR is the compilation directory for the
9606 linetable's compilation unit or NULL if not known.
9607 This routine tries to keep line numbers from identical absolute and
9608 relative file names in a common subfile.
9610 Using the `list' example from the GDB testsuite, which resides in
9611 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
9612 of /srcdir/list0.c yields the following debugging information for list0.c:
9614 DW_AT_name: /srcdir/list0.c
9615 DW_AT_comp_dir: /compdir
9616 files.files[0].name: list0.h
9617 files.files[0].dir: /srcdir
9618 files.files[1].name: list0.c
9619 files.files[1].dir: /srcdir
9621 The line number information for list0.c has to end up in a single
9622 subfile, so that `break /srcdir/list0.c:1' works as expected.
9623 start_subfile will ensure that this happens provided that we pass the
9624 concatenation of files.files[1].dir and files.files[1].name as the
9628 dwarf2_start_subfile (char *filename, char *dirname, char *comp_dir)
9632 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
9633 `start_symtab' will always pass the contents of DW_AT_comp_dir as
9634 second argument to start_subfile. To be consistent, we do the
9635 same here. In order not to lose the line information directory,
9636 we concatenate it to the filename when it makes sense.
9637 Note that the Dwarf3 standard says (speaking of filenames in line
9638 information): ``The directory index is ignored for file names
9639 that represent full path names''. Thus ignoring dirname in the
9640 `else' branch below isn't an issue. */
9642 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
9643 fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
9645 fullname = filename;
9647 start_subfile (fullname, comp_dir);
9649 if (fullname != filename)
9654 var_decode_location (struct attribute *attr, struct symbol *sym,
9655 struct dwarf2_cu *cu)
9657 struct objfile *objfile = cu->objfile;
9658 struct comp_unit_head *cu_header = &cu->header;
9660 /* NOTE drow/2003-01-30: There used to be a comment and some special
9661 code here to turn a symbol with DW_AT_external and a
9662 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
9663 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
9664 with some versions of binutils) where shared libraries could have
9665 relocations against symbols in their debug information - the
9666 minimal symbol would have the right address, but the debug info
9667 would not. It's no longer necessary, because we will explicitly
9668 apply relocations when we read in the debug information now. */
9670 /* A DW_AT_location attribute with no contents indicates that a
9671 variable has been optimized away. */
9672 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
9674 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
9678 /* Handle one degenerate form of location expression specially, to
9679 preserve GDB's previous behavior when section offsets are
9680 specified. If this is just a DW_OP_addr then mark this symbol
9683 if (attr_form_is_block (attr)
9684 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
9685 && DW_BLOCK (attr)->data[0] == DW_OP_addr)
9689 SYMBOL_VALUE_ADDRESS (sym) =
9690 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
9691 SYMBOL_CLASS (sym) = LOC_STATIC;
9692 fixup_symbol_section (sym, objfile);
9693 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
9694 SYMBOL_SECTION (sym));
9698 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
9699 expression evaluator, and use LOC_COMPUTED only when necessary
9700 (i.e. when the value of a register or memory location is
9701 referenced, or a thread-local block, etc.). Then again, it might
9702 not be worthwhile. I'm assuming that it isn't unless performance
9703 or memory numbers show me otherwise. */
9705 dwarf2_symbol_mark_computed (attr, sym, cu);
9706 SYMBOL_CLASS (sym) = LOC_COMPUTED;
9709 /* Given a pointer to a DWARF information entry, figure out if we need
9710 to make a symbol table entry for it, and if so, create a new entry
9711 and return a pointer to it.
9712 If TYPE is NULL, determine symbol type from the die, otherwise
9713 used the passed type. */
9715 static struct symbol *
9716 new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
9718 struct objfile *objfile = cu->objfile;
9719 struct symbol *sym = NULL;
9721 struct attribute *attr = NULL;
9722 struct attribute *attr2 = NULL;
9724 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
9726 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
9728 name = dwarf2_name (die, cu);
9731 const char *linkagename;
9733 sym = (struct symbol *) obstack_alloc (&objfile->objfile_obstack,
9734 sizeof (struct symbol));
9735 OBJSTAT (objfile, n_syms++);
9736 memset (sym, 0, sizeof (struct symbol));
9738 /* Cache this symbol's name and the name's demangled form (if any). */
9739 SYMBOL_LANGUAGE (sym) = cu->language;
9740 linkagename = dwarf2_physname (name, die, cu);
9741 SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile);
9743 /* Fortran does not have mangling standard and the mangling does differ
9744 between gfortran, iFort etc. */
9745 if (cu->language == language_fortran
9746 && sym->ginfo.language_specific.cplus_specific.demangled_name == NULL)
9747 sym->ginfo.language_specific.cplus_specific.demangled_name
9748 = (char *) dwarf2_full_name (name, die, cu);
9750 /* Default assumptions.
9751 Use the passed type or decode it from the die. */
9752 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
9753 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
9755 SYMBOL_TYPE (sym) = type;
9757 SYMBOL_TYPE (sym) = die_type (die, cu);
9758 attr = dwarf2_attr (die,
9759 inlined_func ? DW_AT_call_line : DW_AT_decl_line,
9763 SYMBOL_LINE (sym) = DW_UNSND (attr);
9766 attr = dwarf2_attr (die,
9767 inlined_func ? DW_AT_call_file : DW_AT_decl_file,
9771 int file_index = DW_UNSND (attr);
9773 if (cu->line_header == NULL
9774 || file_index > cu->line_header->num_file_names)
9775 complaint (&symfile_complaints,
9776 _("file index out of range"));
9777 else if (file_index > 0)
9779 struct file_entry *fe;
9781 fe = &cu->line_header->file_names[file_index - 1];
9782 SYMBOL_SYMTAB (sym) = fe->symtab;
9789 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
9792 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
9794 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr;
9795 SYMBOL_DOMAIN (sym) = LABEL_DOMAIN;
9796 SYMBOL_CLASS (sym) = LOC_LABEL;
9797 add_symbol_to_list (sym, cu->list_in_scope);
9799 case DW_TAG_subprogram:
9800 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
9802 SYMBOL_CLASS (sym) = LOC_BLOCK;
9803 attr2 = dwarf2_attr (die, DW_AT_external, cu);
9804 if ((attr2 && (DW_UNSND (attr2) != 0))
9805 || cu->language == language_ada)
9807 /* Subprograms marked external are stored as a global symbol.
9808 Ada subprograms, whether marked external or not, are always
9809 stored as a global symbol, because we want to be able to
9810 access them globally. For instance, we want to be able
9811 to break on a nested subprogram without having to
9812 specify the context. */
9813 add_symbol_to_list (sym, &global_symbols);
9817 add_symbol_to_list (sym, cu->list_in_scope);
9820 case DW_TAG_inlined_subroutine:
9821 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
9823 SYMBOL_CLASS (sym) = LOC_BLOCK;
9824 SYMBOL_INLINED (sym) = 1;
9825 /* Do not add the symbol to any lists. It will be found via
9826 BLOCK_FUNCTION from the blockvector. */
9828 case DW_TAG_variable:
9830 /* Compilation with minimal debug info may result in variables
9831 with missing type entries. Change the misleading `void' type
9832 to something sensible. */
9833 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
9835 = objfile_type (objfile)->nodebug_data_symbol;
9837 attr = dwarf2_attr (die, DW_AT_const_value, cu);
9838 /* In the case of DW_TAG_member, we should only be called for
9839 static const members. */
9840 if (die->tag == DW_TAG_member)
9842 /* dwarf2_add_field uses die_is_declaration,
9843 so we do the same. */
9844 gdb_assert (die_is_declaration (die, cu));
9849 dwarf2_const_value (attr, sym, cu);
9850 attr2 = dwarf2_attr (die, DW_AT_external, cu);
9851 if (attr2 && (DW_UNSND (attr2) != 0))
9852 add_symbol_to_list (sym, &global_symbols);
9854 add_symbol_to_list (sym, cu->list_in_scope);
9857 attr = dwarf2_attr (die, DW_AT_location, cu);
9860 var_decode_location (attr, sym, cu);
9861 attr2 = dwarf2_attr (die, DW_AT_external, cu);
9862 if (attr2 && (DW_UNSND (attr2) != 0))
9864 struct pending **list_to_add;
9866 /* Workaround gfortran PR debug/40040 - it uses
9867 DW_AT_location for variables in -fPIC libraries which may
9868 get overriden by other libraries/executable and get
9869 a different address. Resolve it by the minimal symbol
9870 which may come from inferior's executable using copy
9871 relocation. Make this workaround only for gfortran as for
9872 other compilers GDB cannot guess the minimal symbol
9873 Fortran mangling kind. */
9874 if (cu->language == language_fortran && die->parent
9875 && die->parent->tag == DW_TAG_module
9877 && strncmp (cu->producer, "GNU Fortran ", 12) == 0)
9878 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
9880 /* A variable with DW_AT_external is never static,
9881 but it may be block-scoped. */
9882 list_to_add = (cu->list_in_scope == &file_symbols
9883 ? &global_symbols : cu->list_in_scope);
9884 add_symbol_to_list (sym, list_to_add);
9887 add_symbol_to_list (sym, cu->list_in_scope);
9891 /* We do not know the address of this symbol.
9892 If it is an external symbol and we have type information
9893 for it, enter the symbol as a LOC_UNRESOLVED symbol.
9894 The address of the variable will then be determined from
9895 the minimal symbol table whenever the variable is
9897 attr2 = dwarf2_attr (die, DW_AT_external, cu);
9898 if (attr2 && (DW_UNSND (attr2) != 0)
9899 && dwarf2_attr (die, DW_AT_type, cu) != NULL)
9901 struct pending **list_to_add;
9903 /* A variable with DW_AT_external is never static, but it
9904 may be block-scoped. */
9905 list_to_add = (cu->list_in_scope == &file_symbols
9906 ? &global_symbols : cu->list_in_scope);
9908 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
9909 add_symbol_to_list (sym, list_to_add);
9911 else if (!die_is_declaration (die, cu))
9913 /* Use the default LOC_OPTIMIZED_OUT class. */
9914 gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT);
9915 add_symbol_to_list (sym, cu->list_in_scope);
9919 case DW_TAG_formal_parameter:
9920 /* If we are inside a function, mark this as an argument. If
9921 not, we might be looking at an argument to an inlined function
9922 when we do not have enough information to show inlined frames;
9923 pretend it's a local variable in that case so that the user can
9925 if (context_stack_depth > 0
9926 && context_stack[context_stack_depth - 1].name != NULL)
9927 SYMBOL_IS_ARGUMENT (sym) = 1;
9928 attr = dwarf2_attr (die, DW_AT_location, cu);
9931 var_decode_location (attr, sym, cu);
9933 attr = dwarf2_attr (die, DW_AT_const_value, cu);
9936 dwarf2_const_value (attr, sym, cu);
9938 attr = dwarf2_attr (die, DW_AT_variable_parameter, cu);
9939 if (attr && DW_UNSND (attr))
9941 struct type *ref_type;
9943 ref_type = lookup_reference_type (SYMBOL_TYPE (sym));
9944 SYMBOL_TYPE (sym) = ref_type;
9947 add_symbol_to_list (sym, cu->list_in_scope);
9949 case DW_TAG_unspecified_parameters:
9950 /* From varargs functions; gdb doesn't seem to have any
9951 interest in this information, so just ignore it for now.
9954 case DW_TAG_class_type:
9955 case DW_TAG_interface_type:
9956 case DW_TAG_structure_type:
9957 case DW_TAG_union_type:
9958 case DW_TAG_set_type:
9959 case DW_TAG_enumeration_type:
9960 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
9961 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
9964 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
9965 really ever be static objects: otherwise, if you try
9966 to, say, break of a class's method and you're in a file
9967 which doesn't mention that class, it won't work unless
9968 the check for all static symbols in lookup_symbol_aux
9969 saves you. See the OtherFileClass tests in
9970 gdb.c++/namespace.exp. */
9972 struct pending **list_to_add;
9974 list_to_add = (cu->list_in_scope == &file_symbols
9975 && (cu->language == language_cplus
9976 || cu->language == language_java)
9977 ? &global_symbols : cu->list_in_scope);
9979 add_symbol_to_list (sym, list_to_add);
9981 /* The semantics of C++ state that "struct foo { ... }" also
9982 defines a typedef for "foo". A Java class declaration also
9983 defines a typedef for the class. */
9984 if (cu->language == language_cplus
9985 || cu->language == language_java
9986 || cu->language == language_ada)
9988 /* The symbol's name is already allocated along with
9989 this objfile, so we don't need to duplicate it for
9991 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
9992 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
9996 case DW_TAG_typedef:
9997 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
9998 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
9999 add_symbol_to_list (sym, cu->list_in_scope);
10001 case DW_TAG_base_type:
10002 case DW_TAG_subrange_type:
10003 case DW_TAG_const_type:
10004 case DW_TAG_volatile_type:
10005 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
10006 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
10007 add_symbol_to_list (sym, cu->list_in_scope);
10009 case DW_TAG_enumerator:
10010 attr = dwarf2_attr (die, DW_AT_const_value, cu);
10013 dwarf2_const_value (attr, sym, cu);
10016 /* NOTE: carlton/2003-11-10: See comment above in the
10017 DW_TAG_class_type, etc. block. */
10019 struct pending **list_to_add;
10021 list_to_add = (cu->list_in_scope == &file_symbols
10022 && (cu->language == language_cplus
10023 || cu->language == language_java)
10024 ? &global_symbols : cu->list_in_scope);
10026 add_symbol_to_list (sym, list_to_add);
10029 case DW_TAG_namespace:
10030 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
10031 add_symbol_to_list (sym, &global_symbols);
10034 /* Not a tag we recognize. Hopefully we aren't processing
10035 trash data, but since we must specifically ignore things
10036 we don't recognize, there is nothing else we should do at
10038 complaint (&symfile_complaints, _("unsupported tag: '%s'"),
10039 dwarf_tag_name (die->tag));
10043 /* For the benefit of old versions of GCC, check for anonymous
10044 namespaces based on the demangled name. */
10045 if (!processing_has_namespace_info
10046 && cu->language == language_cplus)
10047 cp_scan_for_anonymous_namespaces (sym);
10052 /* Copy constant value from an attribute to a symbol. */
10055 dwarf2_const_value (struct attribute *attr, struct symbol *sym,
10056 struct dwarf2_cu *cu)
10058 struct objfile *objfile = cu->objfile;
10059 struct comp_unit_head *cu_header = &cu->header;
10060 enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ?
10061 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
10062 struct dwarf_block *blk;
10064 switch (attr->form)
10068 struct dwarf2_locexpr_baton *baton;
10071 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size)
10072 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym),
10073 cu_header->addr_size,
10074 TYPE_LENGTH (SYMBOL_TYPE
10076 /* Symbols of this form are reasonably rare, so we just
10077 piggyback on the existing location code rather than writing
10078 a new implementation of symbol_computed_ops. */
10079 baton = obstack_alloc (&objfile->objfile_obstack,
10080 sizeof (struct dwarf2_locexpr_baton));
10081 baton->per_cu = cu->per_cu;
10082 gdb_assert (baton->per_cu);
10084 baton->size = 2 + cu_header->addr_size;
10085 data = obstack_alloc (&objfile->objfile_obstack, baton->size);
10086 baton->data = data;
10088 data[0] = DW_OP_addr;
10089 store_unsigned_integer (&data[1], cu_header->addr_size,
10090 byte_order, DW_ADDR (attr));
10091 data[cu_header->addr_size + 1] = DW_OP_stack_value;
10093 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
10094 SYMBOL_LOCATION_BATON (sym) = baton;
10095 SYMBOL_CLASS (sym) = LOC_COMPUTED;
10098 case DW_FORM_string:
10100 /* DW_STRING is already allocated on the obstack, point directly
10102 SYMBOL_VALUE_BYTES (sym) = (gdb_byte *) DW_STRING (attr);
10103 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
10105 case DW_FORM_block1:
10106 case DW_FORM_block2:
10107 case DW_FORM_block4:
10108 case DW_FORM_block:
10109 case DW_FORM_exprloc:
10110 blk = DW_BLOCK (attr);
10111 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size)
10112 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym),
10114 TYPE_LENGTH (SYMBOL_TYPE
10116 SYMBOL_VALUE_BYTES (sym) =
10117 obstack_alloc (&objfile->objfile_obstack, blk->size);
10118 memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size);
10119 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
10122 /* The DW_AT_const_value attributes are supposed to carry the
10123 symbol's value "represented as it would be on the target
10124 architecture." By the time we get here, it's already been
10125 converted to host endianness, so we just need to sign- or
10126 zero-extend it as appropriate. */
10127 case DW_FORM_data1:
10128 dwarf2_const_value_data (attr, sym, 8);
10130 case DW_FORM_data2:
10131 dwarf2_const_value_data (attr, sym, 16);
10133 case DW_FORM_data4:
10134 dwarf2_const_value_data (attr, sym, 32);
10136 case DW_FORM_data8:
10137 dwarf2_const_value_data (attr, sym, 64);
10140 case DW_FORM_sdata:
10141 SYMBOL_VALUE (sym) = DW_SND (attr);
10142 SYMBOL_CLASS (sym) = LOC_CONST;
10145 case DW_FORM_udata:
10146 SYMBOL_VALUE (sym) = DW_UNSND (attr);
10147 SYMBOL_CLASS (sym) = LOC_CONST;
10151 complaint (&symfile_complaints,
10152 _("unsupported const value attribute form: '%s'"),
10153 dwarf_form_name (attr->form));
10154 SYMBOL_VALUE (sym) = 0;
10155 SYMBOL_CLASS (sym) = LOC_CONST;
10161 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
10162 or zero-extend it as appropriate for the symbol's type. */
10164 dwarf2_const_value_data (struct attribute *attr,
10165 struct symbol *sym,
10168 LONGEST l = DW_UNSND (attr);
10170 if (bits < sizeof (l) * 8)
10172 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym)))
10173 l &= ((LONGEST) 1 << bits) - 1;
10175 l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits);
10178 SYMBOL_VALUE (sym) = l;
10179 SYMBOL_CLASS (sym) = LOC_CONST;
10183 /* Return the type of the die in question using its DW_AT_type attribute. */
10185 static struct type *
10186 die_type (struct die_info *die, struct dwarf2_cu *cu)
10188 struct attribute *type_attr;
10189 struct die_info *type_die;
10191 type_attr = dwarf2_attr (die, DW_AT_type, cu);
10194 /* A missing DW_AT_type represents a void type. */
10195 return objfile_type (cu->objfile)->builtin_void;
10198 type_die = follow_die_ref_or_sig (die, type_attr, &cu);
10200 return tag_type_to_type (type_die, cu);
10203 /* True iff CU's producer generates GNAT Ada auxiliary information
10204 that allows to find parallel types through that information instead
10205 of having to do expensive parallel lookups by type name. */
10208 need_gnat_info (struct dwarf2_cu *cu)
10210 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
10211 of GNAT produces this auxiliary information, without any indication
10212 that it is produced. Part of enhancing the FSF version of GNAT
10213 to produce that information will be to put in place an indicator
10214 that we can use in order to determine whether the descriptive type
10215 info is available or not. One suggestion that has been made is
10216 to use a new attribute, attached to the CU die. For now, assume
10217 that the descriptive type info is not available. */
10222 /* Return the auxiliary type of the die in question using its
10223 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
10224 attribute is not present. */
10226 static struct type *
10227 die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu)
10229 struct attribute *type_attr;
10230 struct die_info *type_die;
10232 type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu);
10236 type_die = follow_die_ref (die, type_attr, &cu);
10237 return tag_type_to_type (type_die, cu);
10240 /* If DIE has a descriptive_type attribute, then set the TYPE's
10241 descriptive type accordingly. */
10244 set_descriptive_type (struct type *type, struct die_info *die,
10245 struct dwarf2_cu *cu)
10247 struct type *descriptive_type = die_descriptive_type (die, cu);
10249 if (descriptive_type)
10251 ALLOCATE_GNAT_AUX_TYPE (type);
10252 TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type;
10256 /* Return the containing type of the die in question using its
10257 DW_AT_containing_type attribute. */
10259 static struct type *
10260 die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
10262 struct attribute *type_attr;
10263 struct die_info *type_die;
10265 type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
10267 error (_("Dwarf Error: Problem turning containing type into gdb type "
10268 "[in module %s]"), cu->objfile->name);
10270 type_die = follow_die_ref_or_sig (die, type_attr, &cu);
10271 return tag_type_to_type (type_die, cu);
10274 static struct type *
10275 tag_type_to_type (struct die_info *die, struct dwarf2_cu *cu)
10277 struct type *this_type;
10279 this_type = read_type_die (die, cu);
10282 char *message, *saved;
10284 /* read_type_die already issued a complaint. */
10285 message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
10289 saved = obstack_copy0 (&cu->objfile->objfile_obstack,
10290 message, strlen (message));
10293 this_type = init_type (TYPE_CODE_ERROR, 0, 0, saved, cu->objfile);
10298 static struct type *
10299 read_type_die (struct die_info *die, struct dwarf2_cu *cu)
10301 struct type *this_type;
10303 this_type = get_die_type (die, cu);
10309 case DW_TAG_class_type:
10310 case DW_TAG_interface_type:
10311 case DW_TAG_structure_type:
10312 case DW_TAG_union_type:
10313 this_type = read_structure_type (die, cu);
10315 case DW_TAG_enumeration_type:
10316 this_type = read_enumeration_type (die, cu);
10318 case DW_TAG_subprogram:
10319 case DW_TAG_subroutine_type:
10320 case DW_TAG_inlined_subroutine:
10321 this_type = read_subroutine_type (die, cu);
10323 case DW_TAG_array_type:
10324 this_type = read_array_type (die, cu);
10326 case DW_TAG_set_type:
10327 this_type = read_set_type (die, cu);
10329 case DW_TAG_pointer_type:
10330 this_type = read_tag_pointer_type (die, cu);
10332 case DW_TAG_ptr_to_member_type:
10333 this_type = read_tag_ptr_to_member_type (die, cu);
10335 case DW_TAG_reference_type:
10336 this_type = read_tag_reference_type (die, cu);
10338 case DW_TAG_const_type:
10339 this_type = read_tag_const_type (die, cu);
10341 case DW_TAG_volatile_type:
10342 this_type = read_tag_volatile_type (die, cu);
10344 case DW_TAG_string_type:
10345 this_type = read_tag_string_type (die, cu);
10347 case DW_TAG_typedef:
10348 this_type = read_typedef (die, cu);
10350 case DW_TAG_subrange_type:
10351 this_type = read_subrange_type (die, cu);
10353 case DW_TAG_base_type:
10354 this_type = read_base_type (die, cu);
10356 case DW_TAG_unspecified_type:
10357 this_type = read_unspecified_type (die, cu);
10359 case DW_TAG_namespace:
10360 this_type = read_namespace_type (die, cu);
10362 case DW_TAG_module:
10363 this_type = read_module_type (die, cu);
10366 complaint (&symfile_complaints, _("unexpected tag in read_type_die: '%s'"),
10367 dwarf_tag_name (die->tag));
10374 /* Return the name of the namespace/class that DIE is defined within,
10375 or "" if we can't tell. The caller should not xfree the result.
10377 For example, if we're within the method foo() in the following
10387 then determine_prefix on foo's die will return "N::C". */
10390 determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
10392 struct die_info *parent, *spec_die;
10393 struct dwarf2_cu *spec_cu;
10394 struct type *parent_type;
10396 if (cu->language != language_cplus && cu->language != language_java
10397 && cu->language != language_fortran)
10400 /* We have to be careful in the presence of DW_AT_specification.
10401 For example, with GCC 3.4, given the code
10405 // Definition of N::foo.
10409 then we'll have a tree of DIEs like this:
10411 1: DW_TAG_compile_unit
10412 2: DW_TAG_namespace // N
10413 3: DW_TAG_subprogram // declaration of N::foo
10414 4: DW_TAG_subprogram // definition of N::foo
10415 DW_AT_specification // refers to die #3
10417 Thus, when processing die #4, we have to pretend that we're in
10418 the context of its DW_AT_specification, namely the contex of die
10421 spec_die = die_specification (die, &spec_cu);
10422 if (spec_die == NULL)
10423 parent = die->parent;
10426 parent = spec_die->parent;
10430 if (parent == NULL)
10433 switch (parent->tag)
10435 case DW_TAG_namespace:
10436 parent_type = read_type_die (parent, cu);
10437 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
10438 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
10439 Work around this problem here. */
10440 if (cu->language == language_cplus
10441 && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0)
10443 /* We give a name to even anonymous namespaces. */
10444 return TYPE_TAG_NAME (parent_type);
10445 case DW_TAG_class_type:
10446 case DW_TAG_interface_type:
10447 case DW_TAG_structure_type:
10448 case DW_TAG_union_type:
10449 case DW_TAG_module:
10450 parent_type = read_type_die (parent, cu);
10451 if (TYPE_TAG_NAME (parent_type) != NULL)
10452 return TYPE_TAG_NAME (parent_type);
10454 /* An anonymous structure is only allowed non-static data
10455 members; no typedefs, no member functions, et cetera.
10456 So it does not need a prefix. */
10459 return determine_prefix (parent, cu);
10463 /* Return a newly-allocated string formed by concatenating PREFIX and
10464 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
10465 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
10466 perform an obconcat, otherwise allocate storage for the result. The CU argument
10467 is used to determine the language and hence, the appropriate separator. */
10469 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
10472 typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
10473 int physname, struct dwarf2_cu *cu)
10475 const char *lead = "";
10478 if (suffix == NULL || suffix[0] == '\0' || prefix == NULL || prefix[0] == '\0')
10480 else if (cu->language == language_java)
10482 else if (cu->language == language_fortran && physname)
10484 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
10485 DW_AT_MIPS_linkage_name is preferred and used instead. */
10493 if (prefix == NULL)
10495 if (suffix == NULL)
10500 char *retval = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
10502 strcpy (retval, lead);
10503 strcat (retval, prefix);
10504 strcat (retval, sep);
10505 strcat (retval, suffix);
10510 /* We have an obstack. */
10511 return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL);
10515 /* Return sibling of die, NULL if no sibling. */
10517 static struct die_info *
10518 sibling_die (struct die_info *die)
10520 return die->sibling;
10523 /* Get name of a die, return NULL if not found. */
10526 dwarf2_canonicalize_name (char *name, struct dwarf2_cu *cu,
10527 struct obstack *obstack)
10529 if (name && cu->language == language_cplus)
10531 char *canon_name = cp_canonicalize_string (name);
10533 if (canon_name != NULL)
10535 if (strcmp (canon_name, name) != 0)
10536 name = obsavestring (canon_name, strlen (canon_name),
10538 xfree (canon_name);
10545 /* Get name of a die, return NULL if not found. */
10548 dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
10550 struct attribute *attr;
10552 attr = dwarf2_attr (die, DW_AT_name, cu);
10553 if (!attr || !DW_STRING (attr))
10558 case DW_TAG_compile_unit:
10559 /* Compilation units have a DW_AT_name that is a filename, not
10560 a source language identifier. */
10561 case DW_TAG_enumeration_type:
10562 case DW_TAG_enumerator:
10563 /* These tags always have simple identifiers already; no need
10564 to canonicalize them. */
10565 return DW_STRING (attr);
10567 case DW_TAG_subprogram:
10568 /* Java constructors will all be named "<init>", so return
10569 the class name when we see this special case. */
10570 if (cu->language == language_java
10571 && DW_STRING (attr) != NULL
10572 && strcmp (DW_STRING (attr), "<init>") == 0)
10574 struct dwarf2_cu *spec_cu = cu;
10575 struct die_info *spec_die;
10577 /* GCJ will output '<init>' for Java constructor names.
10578 For this special case, return the name of the parent class. */
10580 /* GCJ may output suprogram DIEs with AT_specification set.
10581 If so, use the name of the specified DIE. */
10582 spec_die = die_specification (die, &spec_cu);
10583 if (spec_die != NULL)
10584 return dwarf2_name (spec_die, spec_cu);
10589 if (die->tag == DW_TAG_class_type)
10590 return dwarf2_name (die, cu);
10592 while (die->tag != DW_TAG_compile_unit);
10596 case DW_TAG_class_type:
10597 case DW_TAG_interface_type:
10598 case DW_TAG_structure_type:
10599 case DW_TAG_union_type:
10600 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
10601 structures or unions. These were of the form "._%d" in GCC 4.1,
10602 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
10603 and GCC 4.4. We work around this problem by ignoring these. */
10604 if (strncmp (DW_STRING (attr), "._", 2) == 0
10605 || strncmp (DW_STRING (attr), "<anonymous", 10) == 0)
10613 if (!DW_STRING_IS_CANONICAL (attr))
10616 = dwarf2_canonicalize_name (DW_STRING (attr), cu,
10617 &cu->objfile->objfile_obstack);
10618 DW_STRING_IS_CANONICAL (attr) = 1;
10620 return DW_STRING (attr);
10623 /* Return the die that this die in an extension of, or NULL if there
10624 is none. *EXT_CU is the CU containing DIE on input, and the CU
10625 containing the return value on output. */
10627 static struct die_info *
10628 dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu)
10630 struct attribute *attr;
10632 attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
10636 return follow_die_ref (die, attr, ext_cu);
10639 /* Convert a DIE tag into its string name. */
10642 dwarf_tag_name (unsigned tag)
10646 case DW_TAG_padding:
10647 return "DW_TAG_padding";
10648 case DW_TAG_array_type:
10649 return "DW_TAG_array_type";
10650 case DW_TAG_class_type:
10651 return "DW_TAG_class_type";
10652 case DW_TAG_entry_point:
10653 return "DW_TAG_entry_point";
10654 case DW_TAG_enumeration_type:
10655 return "DW_TAG_enumeration_type";
10656 case DW_TAG_formal_parameter:
10657 return "DW_TAG_formal_parameter";
10658 case DW_TAG_imported_declaration:
10659 return "DW_TAG_imported_declaration";
10661 return "DW_TAG_label";
10662 case DW_TAG_lexical_block:
10663 return "DW_TAG_lexical_block";
10664 case DW_TAG_member:
10665 return "DW_TAG_member";
10666 case DW_TAG_pointer_type:
10667 return "DW_TAG_pointer_type";
10668 case DW_TAG_reference_type:
10669 return "DW_TAG_reference_type";
10670 case DW_TAG_compile_unit:
10671 return "DW_TAG_compile_unit";
10672 case DW_TAG_string_type:
10673 return "DW_TAG_string_type";
10674 case DW_TAG_structure_type:
10675 return "DW_TAG_structure_type";
10676 case DW_TAG_subroutine_type:
10677 return "DW_TAG_subroutine_type";
10678 case DW_TAG_typedef:
10679 return "DW_TAG_typedef";
10680 case DW_TAG_union_type:
10681 return "DW_TAG_union_type";
10682 case DW_TAG_unspecified_parameters:
10683 return "DW_TAG_unspecified_parameters";
10684 case DW_TAG_variant:
10685 return "DW_TAG_variant";
10686 case DW_TAG_common_block:
10687 return "DW_TAG_common_block";
10688 case DW_TAG_common_inclusion:
10689 return "DW_TAG_common_inclusion";
10690 case DW_TAG_inheritance:
10691 return "DW_TAG_inheritance";
10692 case DW_TAG_inlined_subroutine:
10693 return "DW_TAG_inlined_subroutine";
10694 case DW_TAG_module:
10695 return "DW_TAG_module";
10696 case DW_TAG_ptr_to_member_type:
10697 return "DW_TAG_ptr_to_member_type";
10698 case DW_TAG_set_type:
10699 return "DW_TAG_set_type";
10700 case DW_TAG_subrange_type:
10701 return "DW_TAG_subrange_type";
10702 case DW_TAG_with_stmt:
10703 return "DW_TAG_with_stmt";
10704 case DW_TAG_access_declaration:
10705 return "DW_TAG_access_declaration";
10706 case DW_TAG_base_type:
10707 return "DW_TAG_base_type";
10708 case DW_TAG_catch_block:
10709 return "DW_TAG_catch_block";
10710 case DW_TAG_const_type:
10711 return "DW_TAG_const_type";
10712 case DW_TAG_constant:
10713 return "DW_TAG_constant";
10714 case DW_TAG_enumerator:
10715 return "DW_TAG_enumerator";
10716 case DW_TAG_file_type:
10717 return "DW_TAG_file_type";
10718 case DW_TAG_friend:
10719 return "DW_TAG_friend";
10720 case DW_TAG_namelist:
10721 return "DW_TAG_namelist";
10722 case DW_TAG_namelist_item:
10723 return "DW_TAG_namelist_item";
10724 case DW_TAG_packed_type:
10725 return "DW_TAG_packed_type";
10726 case DW_TAG_subprogram:
10727 return "DW_TAG_subprogram";
10728 case DW_TAG_template_type_param:
10729 return "DW_TAG_template_type_param";
10730 case DW_TAG_template_value_param:
10731 return "DW_TAG_template_value_param";
10732 case DW_TAG_thrown_type:
10733 return "DW_TAG_thrown_type";
10734 case DW_TAG_try_block:
10735 return "DW_TAG_try_block";
10736 case DW_TAG_variant_part:
10737 return "DW_TAG_variant_part";
10738 case DW_TAG_variable:
10739 return "DW_TAG_variable";
10740 case DW_TAG_volatile_type:
10741 return "DW_TAG_volatile_type";
10742 case DW_TAG_dwarf_procedure:
10743 return "DW_TAG_dwarf_procedure";
10744 case DW_TAG_restrict_type:
10745 return "DW_TAG_restrict_type";
10746 case DW_TAG_interface_type:
10747 return "DW_TAG_interface_type";
10748 case DW_TAG_namespace:
10749 return "DW_TAG_namespace";
10750 case DW_TAG_imported_module:
10751 return "DW_TAG_imported_module";
10752 case DW_TAG_unspecified_type:
10753 return "DW_TAG_unspecified_type";
10754 case DW_TAG_partial_unit:
10755 return "DW_TAG_partial_unit";
10756 case DW_TAG_imported_unit:
10757 return "DW_TAG_imported_unit";
10758 case DW_TAG_condition:
10759 return "DW_TAG_condition";
10760 case DW_TAG_shared_type:
10761 return "DW_TAG_shared_type";
10762 case DW_TAG_type_unit:
10763 return "DW_TAG_type_unit";
10764 case DW_TAG_MIPS_loop:
10765 return "DW_TAG_MIPS_loop";
10766 case DW_TAG_HP_array_descriptor:
10767 return "DW_TAG_HP_array_descriptor";
10768 case DW_TAG_format_label:
10769 return "DW_TAG_format_label";
10770 case DW_TAG_function_template:
10771 return "DW_TAG_function_template";
10772 case DW_TAG_class_template:
10773 return "DW_TAG_class_template";
10774 case DW_TAG_GNU_BINCL:
10775 return "DW_TAG_GNU_BINCL";
10776 case DW_TAG_GNU_EINCL:
10777 return "DW_TAG_GNU_EINCL";
10778 case DW_TAG_upc_shared_type:
10779 return "DW_TAG_upc_shared_type";
10780 case DW_TAG_upc_strict_type:
10781 return "DW_TAG_upc_strict_type";
10782 case DW_TAG_upc_relaxed_type:
10783 return "DW_TAG_upc_relaxed_type";
10784 case DW_TAG_PGI_kanji_type:
10785 return "DW_TAG_PGI_kanji_type";
10786 case DW_TAG_PGI_interface_block:
10787 return "DW_TAG_PGI_interface_block";
10789 return "DW_TAG_<unknown>";
10793 /* Convert a DWARF attribute code into its string name. */
10796 dwarf_attr_name (unsigned attr)
10800 case DW_AT_sibling:
10801 return "DW_AT_sibling";
10802 case DW_AT_location:
10803 return "DW_AT_location";
10805 return "DW_AT_name";
10806 case DW_AT_ordering:
10807 return "DW_AT_ordering";
10808 case DW_AT_subscr_data:
10809 return "DW_AT_subscr_data";
10810 case DW_AT_byte_size:
10811 return "DW_AT_byte_size";
10812 case DW_AT_bit_offset:
10813 return "DW_AT_bit_offset";
10814 case DW_AT_bit_size:
10815 return "DW_AT_bit_size";
10816 case DW_AT_element_list:
10817 return "DW_AT_element_list";
10818 case DW_AT_stmt_list:
10819 return "DW_AT_stmt_list";
10821 return "DW_AT_low_pc";
10822 case DW_AT_high_pc:
10823 return "DW_AT_high_pc";
10824 case DW_AT_language:
10825 return "DW_AT_language";
10827 return "DW_AT_member";
10829 return "DW_AT_discr";
10830 case DW_AT_discr_value:
10831 return "DW_AT_discr_value";
10832 case DW_AT_visibility:
10833 return "DW_AT_visibility";
10835 return "DW_AT_import";
10836 case DW_AT_string_length:
10837 return "DW_AT_string_length";
10838 case DW_AT_common_reference:
10839 return "DW_AT_common_reference";
10840 case DW_AT_comp_dir:
10841 return "DW_AT_comp_dir";
10842 case DW_AT_const_value:
10843 return "DW_AT_const_value";
10844 case DW_AT_containing_type:
10845 return "DW_AT_containing_type";
10846 case DW_AT_default_value:
10847 return "DW_AT_default_value";
10849 return "DW_AT_inline";
10850 case DW_AT_is_optional:
10851 return "DW_AT_is_optional";
10852 case DW_AT_lower_bound:
10853 return "DW_AT_lower_bound";
10854 case DW_AT_producer:
10855 return "DW_AT_producer";
10856 case DW_AT_prototyped:
10857 return "DW_AT_prototyped";
10858 case DW_AT_return_addr:
10859 return "DW_AT_return_addr";
10860 case DW_AT_start_scope:
10861 return "DW_AT_start_scope";
10862 case DW_AT_bit_stride:
10863 return "DW_AT_bit_stride";
10864 case DW_AT_upper_bound:
10865 return "DW_AT_upper_bound";
10866 case DW_AT_abstract_origin:
10867 return "DW_AT_abstract_origin";
10868 case DW_AT_accessibility:
10869 return "DW_AT_accessibility";
10870 case DW_AT_address_class:
10871 return "DW_AT_address_class";
10872 case DW_AT_artificial:
10873 return "DW_AT_artificial";
10874 case DW_AT_base_types:
10875 return "DW_AT_base_types";
10876 case DW_AT_calling_convention:
10877 return "DW_AT_calling_convention";
10879 return "DW_AT_count";
10880 case DW_AT_data_member_location:
10881 return "DW_AT_data_member_location";
10882 case DW_AT_decl_column:
10883 return "DW_AT_decl_column";
10884 case DW_AT_decl_file:
10885 return "DW_AT_decl_file";
10886 case DW_AT_decl_line:
10887 return "DW_AT_decl_line";
10888 case DW_AT_declaration:
10889 return "DW_AT_declaration";
10890 case DW_AT_discr_list:
10891 return "DW_AT_discr_list";
10892 case DW_AT_encoding:
10893 return "DW_AT_encoding";
10894 case DW_AT_external:
10895 return "DW_AT_external";
10896 case DW_AT_frame_base:
10897 return "DW_AT_frame_base";
10899 return "DW_AT_friend";
10900 case DW_AT_identifier_case:
10901 return "DW_AT_identifier_case";
10902 case DW_AT_macro_info:
10903 return "DW_AT_macro_info";
10904 case DW_AT_namelist_items:
10905 return "DW_AT_namelist_items";
10906 case DW_AT_priority:
10907 return "DW_AT_priority";
10908 case DW_AT_segment:
10909 return "DW_AT_segment";
10910 case DW_AT_specification:
10911 return "DW_AT_specification";
10912 case DW_AT_static_link:
10913 return "DW_AT_static_link";
10915 return "DW_AT_type";
10916 case DW_AT_use_location:
10917 return "DW_AT_use_location";
10918 case DW_AT_variable_parameter:
10919 return "DW_AT_variable_parameter";
10920 case DW_AT_virtuality:
10921 return "DW_AT_virtuality";
10922 case DW_AT_vtable_elem_location:
10923 return "DW_AT_vtable_elem_location";
10924 /* DWARF 3 values. */
10925 case DW_AT_allocated:
10926 return "DW_AT_allocated";
10927 case DW_AT_associated:
10928 return "DW_AT_associated";
10929 case DW_AT_data_location:
10930 return "DW_AT_data_location";
10931 case DW_AT_byte_stride:
10932 return "DW_AT_byte_stride";
10933 case DW_AT_entry_pc:
10934 return "DW_AT_entry_pc";
10935 case DW_AT_use_UTF8:
10936 return "DW_AT_use_UTF8";
10937 case DW_AT_extension:
10938 return "DW_AT_extension";
10940 return "DW_AT_ranges";
10941 case DW_AT_trampoline:
10942 return "DW_AT_trampoline";
10943 case DW_AT_call_column:
10944 return "DW_AT_call_column";
10945 case DW_AT_call_file:
10946 return "DW_AT_call_file";
10947 case DW_AT_call_line:
10948 return "DW_AT_call_line";
10949 case DW_AT_description:
10950 return "DW_AT_description";
10951 case DW_AT_binary_scale:
10952 return "DW_AT_binary_scale";
10953 case DW_AT_decimal_scale:
10954 return "DW_AT_decimal_scale";
10956 return "DW_AT_small";
10957 case DW_AT_decimal_sign:
10958 return "DW_AT_decimal_sign";
10959 case DW_AT_digit_count:
10960 return "DW_AT_digit_count";
10961 case DW_AT_picture_string:
10962 return "DW_AT_picture_string";
10963 case DW_AT_mutable:
10964 return "DW_AT_mutable";
10965 case DW_AT_threads_scaled:
10966 return "DW_AT_threads_scaled";
10967 case DW_AT_explicit:
10968 return "DW_AT_explicit";
10969 case DW_AT_object_pointer:
10970 return "DW_AT_object_pointer";
10971 case DW_AT_endianity:
10972 return "DW_AT_endianity";
10973 case DW_AT_elemental:
10974 return "DW_AT_elemental";
10976 return "DW_AT_pure";
10977 case DW_AT_recursive:
10978 return "DW_AT_recursive";
10979 /* DWARF 4 values. */
10980 case DW_AT_signature:
10981 return "DW_AT_signature";
10982 case DW_AT_linkage_name:
10983 return "DW_AT_linkage_name";
10984 /* SGI/MIPS extensions. */
10985 #ifdef MIPS /* collides with DW_AT_HP_block_index */
10986 case DW_AT_MIPS_fde:
10987 return "DW_AT_MIPS_fde";
10989 case DW_AT_MIPS_loop_begin:
10990 return "DW_AT_MIPS_loop_begin";
10991 case DW_AT_MIPS_tail_loop_begin:
10992 return "DW_AT_MIPS_tail_loop_begin";
10993 case DW_AT_MIPS_epilog_begin:
10994 return "DW_AT_MIPS_epilog_begin";
10995 case DW_AT_MIPS_loop_unroll_factor:
10996 return "DW_AT_MIPS_loop_unroll_factor";
10997 case DW_AT_MIPS_software_pipeline_depth:
10998 return "DW_AT_MIPS_software_pipeline_depth";
10999 case DW_AT_MIPS_linkage_name:
11000 return "DW_AT_MIPS_linkage_name";
11001 case DW_AT_MIPS_stride:
11002 return "DW_AT_MIPS_stride";
11003 case DW_AT_MIPS_abstract_name:
11004 return "DW_AT_MIPS_abstract_name";
11005 case DW_AT_MIPS_clone_origin:
11006 return "DW_AT_MIPS_clone_origin";
11007 case DW_AT_MIPS_has_inlines:
11008 return "DW_AT_MIPS_has_inlines";
11009 /* HP extensions. */
11010 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
11011 case DW_AT_HP_block_index:
11012 return "DW_AT_HP_block_index";
11014 case DW_AT_HP_unmodifiable:
11015 return "DW_AT_HP_unmodifiable";
11016 case DW_AT_HP_actuals_stmt_list:
11017 return "DW_AT_HP_actuals_stmt_list";
11018 case DW_AT_HP_proc_per_section:
11019 return "DW_AT_HP_proc_per_section";
11020 case DW_AT_HP_raw_data_ptr:
11021 return "DW_AT_HP_raw_data_ptr";
11022 case DW_AT_HP_pass_by_reference:
11023 return "DW_AT_HP_pass_by_reference";
11024 case DW_AT_HP_opt_level:
11025 return "DW_AT_HP_opt_level";
11026 case DW_AT_HP_prof_version_id:
11027 return "DW_AT_HP_prof_version_id";
11028 case DW_AT_HP_opt_flags:
11029 return "DW_AT_HP_opt_flags";
11030 case DW_AT_HP_cold_region_low_pc:
11031 return "DW_AT_HP_cold_region_low_pc";
11032 case DW_AT_HP_cold_region_high_pc:
11033 return "DW_AT_HP_cold_region_high_pc";
11034 case DW_AT_HP_all_variables_modifiable:
11035 return "DW_AT_HP_all_variables_modifiable";
11036 case DW_AT_HP_linkage_name:
11037 return "DW_AT_HP_linkage_name";
11038 case DW_AT_HP_prof_flags:
11039 return "DW_AT_HP_prof_flags";
11040 /* GNU extensions. */
11041 case DW_AT_sf_names:
11042 return "DW_AT_sf_names";
11043 case DW_AT_src_info:
11044 return "DW_AT_src_info";
11045 case DW_AT_mac_info:
11046 return "DW_AT_mac_info";
11047 case DW_AT_src_coords:
11048 return "DW_AT_src_coords";
11049 case DW_AT_body_begin:
11050 return "DW_AT_body_begin";
11051 case DW_AT_body_end:
11052 return "DW_AT_body_end";
11053 case DW_AT_GNU_vector:
11054 return "DW_AT_GNU_vector";
11055 /* VMS extensions. */
11056 case DW_AT_VMS_rtnbeg_pd_address:
11057 return "DW_AT_VMS_rtnbeg_pd_address";
11058 /* UPC extension. */
11059 case DW_AT_upc_threads_scaled:
11060 return "DW_AT_upc_threads_scaled";
11061 /* PGI (STMicroelectronics) extensions. */
11062 case DW_AT_PGI_lbase:
11063 return "DW_AT_PGI_lbase";
11064 case DW_AT_PGI_soffset:
11065 return "DW_AT_PGI_soffset";
11066 case DW_AT_PGI_lstride:
11067 return "DW_AT_PGI_lstride";
11069 return "DW_AT_<unknown>";
11073 /* Convert a DWARF value form code into its string name. */
11076 dwarf_form_name (unsigned form)
11081 return "DW_FORM_addr";
11082 case DW_FORM_block2:
11083 return "DW_FORM_block2";
11084 case DW_FORM_block4:
11085 return "DW_FORM_block4";
11086 case DW_FORM_data2:
11087 return "DW_FORM_data2";
11088 case DW_FORM_data4:
11089 return "DW_FORM_data4";
11090 case DW_FORM_data8:
11091 return "DW_FORM_data8";
11092 case DW_FORM_string:
11093 return "DW_FORM_string";
11094 case DW_FORM_block:
11095 return "DW_FORM_block";
11096 case DW_FORM_block1:
11097 return "DW_FORM_block1";
11098 case DW_FORM_data1:
11099 return "DW_FORM_data1";
11101 return "DW_FORM_flag";
11102 case DW_FORM_sdata:
11103 return "DW_FORM_sdata";
11105 return "DW_FORM_strp";
11106 case DW_FORM_udata:
11107 return "DW_FORM_udata";
11108 case DW_FORM_ref_addr:
11109 return "DW_FORM_ref_addr";
11111 return "DW_FORM_ref1";
11113 return "DW_FORM_ref2";
11115 return "DW_FORM_ref4";
11117 return "DW_FORM_ref8";
11118 case DW_FORM_ref_udata:
11119 return "DW_FORM_ref_udata";
11120 case DW_FORM_indirect:
11121 return "DW_FORM_indirect";
11122 case DW_FORM_sec_offset:
11123 return "DW_FORM_sec_offset";
11124 case DW_FORM_exprloc:
11125 return "DW_FORM_exprloc";
11126 case DW_FORM_flag_present:
11127 return "DW_FORM_flag_present";
11129 return "DW_FORM_sig8";
11131 return "DW_FORM_<unknown>";
11135 /* Convert a DWARF stack opcode into its string name. */
11138 dwarf_stack_op_name (unsigned op, int def)
11143 return "DW_OP_addr";
11145 return "DW_OP_deref";
11146 case DW_OP_const1u:
11147 return "DW_OP_const1u";
11148 case DW_OP_const1s:
11149 return "DW_OP_const1s";
11150 case DW_OP_const2u:
11151 return "DW_OP_const2u";
11152 case DW_OP_const2s:
11153 return "DW_OP_const2s";
11154 case DW_OP_const4u:
11155 return "DW_OP_const4u";
11156 case DW_OP_const4s:
11157 return "DW_OP_const4s";
11158 case DW_OP_const8u:
11159 return "DW_OP_const8u";
11160 case DW_OP_const8s:
11161 return "DW_OP_const8s";
11163 return "DW_OP_constu";
11165 return "DW_OP_consts";
11167 return "DW_OP_dup";
11169 return "DW_OP_drop";
11171 return "DW_OP_over";
11173 return "DW_OP_pick";
11175 return "DW_OP_swap";
11177 return "DW_OP_rot";
11179 return "DW_OP_xderef";
11181 return "DW_OP_abs";
11183 return "DW_OP_and";
11185 return "DW_OP_div";
11187 return "DW_OP_minus";
11189 return "DW_OP_mod";
11191 return "DW_OP_mul";
11193 return "DW_OP_neg";
11195 return "DW_OP_not";
11199 return "DW_OP_plus";
11200 case DW_OP_plus_uconst:
11201 return "DW_OP_plus_uconst";
11203 return "DW_OP_shl";
11205 return "DW_OP_shr";
11207 return "DW_OP_shra";
11209 return "DW_OP_xor";
11211 return "DW_OP_bra";
11225 return "DW_OP_skip";
11227 return "DW_OP_lit0";
11229 return "DW_OP_lit1";
11231 return "DW_OP_lit2";
11233 return "DW_OP_lit3";
11235 return "DW_OP_lit4";
11237 return "DW_OP_lit5";
11239 return "DW_OP_lit6";
11241 return "DW_OP_lit7";
11243 return "DW_OP_lit8";
11245 return "DW_OP_lit9";
11247 return "DW_OP_lit10";
11249 return "DW_OP_lit11";
11251 return "DW_OP_lit12";
11253 return "DW_OP_lit13";
11255 return "DW_OP_lit14";
11257 return "DW_OP_lit15";
11259 return "DW_OP_lit16";
11261 return "DW_OP_lit17";
11263 return "DW_OP_lit18";
11265 return "DW_OP_lit19";
11267 return "DW_OP_lit20";
11269 return "DW_OP_lit21";
11271 return "DW_OP_lit22";
11273 return "DW_OP_lit23";
11275 return "DW_OP_lit24";
11277 return "DW_OP_lit25";
11279 return "DW_OP_lit26";
11281 return "DW_OP_lit27";
11283 return "DW_OP_lit28";
11285 return "DW_OP_lit29";
11287 return "DW_OP_lit30";
11289 return "DW_OP_lit31";
11291 return "DW_OP_reg0";
11293 return "DW_OP_reg1";
11295 return "DW_OP_reg2";
11297 return "DW_OP_reg3";
11299 return "DW_OP_reg4";
11301 return "DW_OP_reg5";
11303 return "DW_OP_reg6";
11305 return "DW_OP_reg7";
11307 return "DW_OP_reg8";
11309 return "DW_OP_reg9";
11311 return "DW_OP_reg10";
11313 return "DW_OP_reg11";
11315 return "DW_OP_reg12";
11317 return "DW_OP_reg13";
11319 return "DW_OP_reg14";
11321 return "DW_OP_reg15";
11323 return "DW_OP_reg16";
11325 return "DW_OP_reg17";
11327 return "DW_OP_reg18";
11329 return "DW_OP_reg19";
11331 return "DW_OP_reg20";
11333 return "DW_OP_reg21";
11335 return "DW_OP_reg22";
11337 return "DW_OP_reg23";
11339 return "DW_OP_reg24";
11341 return "DW_OP_reg25";
11343 return "DW_OP_reg26";
11345 return "DW_OP_reg27";
11347 return "DW_OP_reg28";
11349 return "DW_OP_reg29";
11351 return "DW_OP_reg30";
11353 return "DW_OP_reg31";
11355 return "DW_OP_breg0";
11357 return "DW_OP_breg1";
11359 return "DW_OP_breg2";
11361 return "DW_OP_breg3";
11363 return "DW_OP_breg4";
11365 return "DW_OP_breg5";
11367 return "DW_OP_breg6";
11369 return "DW_OP_breg7";
11371 return "DW_OP_breg8";
11373 return "DW_OP_breg9";
11375 return "DW_OP_breg10";
11377 return "DW_OP_breg11";
11379 return "DW_OP_breg12";
11381 return "DW_OP_breg13";
11383 return "DW_OP_breg14";
11385 return "DW_OP_breg15";
11387 return "DW_OP_breg16";
11389 return "DW_OP_breg17";
11391 return "DW_OP_breg18";
11393 return "DW_OP_breg19";
11395 return "DW_OP_breg20";
11397 return "DW_OP_breg21";
11399 return "DW_OP_breg22";
11401 return "DW_OP_breg23";
11403 return "DW_OP_breg24";
11405 return "DW_OP_breg25";
11407 return "DW_OP_breg26";
11409 return "DW_OP_breg27";
11411 return "DW_OP_breg28";
11413 return "DW_OP_breg29";
11415 return "DW_OP_breg30";
11417 return "DW_OP_breg31";
11419 return "DW_OP_regx";
11421 return "DW_OP_fbreg";
11423 return "DW_OP_bregx";
11425 return "DW_OP_piece";
11426 case DW_OP_deref_size:
11427 return "DW_OP_deref_size";
11428 case DW_OP_xderef_size:
11429 return "DW_OP_xderef_size";
11431 return "DW_OP_nop";
11432 /* DWARF 3 extensions. */
11433 case DW_OP_push_object_address:
11434 return "DW_OP_push_object_address";
11436 return "DW_OP_call2";
11438 return "DW_OP_call4";
11439 case DW_OP_call_ref:
11440 return "DW_OP_call_ref";
11441 case DW_OP_form_tls_address:
11442 return "DW_OP_form_tls_address";
11443 case DW_OP_call_frame_cfa:
11444 return "DW_OP_call_frame_cfa";
11445 case DW_OP_bit_piece:
11446 return "DW_OP_bit_piece";
11447 /* DWARF 4 extensions. */
11448 case DW_OP_implicit_value:
11449 return "DW_OP_implicit_value";
11450 case DW_OP_stack_value:
11451 return "DW_OP_stack_value";
11452 /* GNU extensions. */
11453 case DW_OP_GNU_push_tls_address:
11454 return "DW_OP_GNU_push_tls_address";
11455 case DW_OP_GNU_uninit:
11456 return "DW_OP_GNU_uninit";
11458 return def ? "OP_<unknown>" : NULL;
11463 dwarf_bool_name (unsigned mybool)
11471 /* Convert a DWARF type code into its string name. */
11474 dwarf_type_encoding_name (unsigned enc)
11479 return "DW_ATE_void";
11480 case DW_ATE_address:
11481 return "DW_ATE_address";
11482 case DW_ATE_boolean:
11483 return "DW_ATE_boolean";
11484 case DW_ATE_complex_float:
11485 return "DW_ATE_complex_float";
11487 return "DW_ATE_float";
11488 case DW_ATE_signed:
11489 return "DW_ATE_signed";
11490 case DW_ATE_signed_char:
11491 return "DW_ATE_signed_char";
11492 case DW_ATE_unsigned:
11493 return "DW_ATE_unsigned";
11494 case DW_ATE_unsigned_char:
11495 return "DW_ATE_unsigned_char";
11497 case DW_ATE_imaginary_float:
11498 return "DW_ATE_imaginary_float";
11499 case DW_ATE_packed_decimal:
11500 return "DW_ATE_packed_decimal";
11501 case DW_ATE_numeric_string:
11502 return "DW_ATE_numeric_string";
11503 case DW_ATE_edited:
11504 return "DW_ATE_edited";
11505 case DW_ATE_signed_fixed:
11506 return "DW_ATE_signed_fixed";
11507 case DW_ATE_unsigned_fixed:
11508 return "DW_ATE_unsigned_fixed";
11509 case DW_ATE_decimal_float:
11510 return "DW_ATE_decimal_float";
11513 return "DW_ATE_UTF";
11514 /* HP extensions. */
11515 case DW_ATE_HP_float80:
11516 return "DW_ATE_HP_float80";
11517 case DW_ATE_HP_complex_float80:
11518 return "DW_ATE_HP_complex_float80";
11519 case DW_ATE_HP_float128:
11520 return "DW_ATE_HP_float128";
11521 case DW_ATE_HP_complex_float128:
11522 return "DW_ATE_HP_complex_float128";
11523 case DW_ATE_HP_floathpintel:
11524 return "DW_ATE_HP_floathpintel";
11525 case DW_ATE_HP_imaginary_float80:
11526 return "DW_ATE_HP_imaginary_float80";
11527 case DW_ATE_HP_imaginary_float128:
11528 return "DW_ATE_HP_imaginary_float128";
11530 return "DW_ATE_<unknown>";
11534 /* Convert a DWARF call frame info operation to its string name. */
11538 dwarf_cfi_name (unsigned cfi_opc)
11542 case DW_CFA_advance_loc:
11543 return "DW_CFA_advance_loc";
11544 case DW_CFA_offset:
11545 return "DW_CFA_offset";
11546 case DW_CFA_restore:
11547 return "DW_CFA_restore";
11549 return "DW_CFA_nop";
11550 case DW_CFA_set_loc:
11551 return "DW_CFA_set_loc";
11552 case DW_CFA_advance_loc1:
11553 return "DW_CFA_advance_loc1";
11554 case DW_CFA_advance_loc2:
11555 return "DW_CFA_advance_loc2";
11556 case DW_CFA_advance_loc4:
11557 return "DW_CFA_advance_loc4";
11558 case DW_CFA_offset_extended:
11559 return "DW_CFA_offset_extended";
11560 case DW_CFA_restore_extended:
11561 return "DW_CFA_restore_extended";
11562 case DW_CFA_undefined:
11563 return "DW_CFA_undefined";
11564 case DW_CFA_same_value:
11565 return "DW_CFA_same_value";
11566 case DW_CFA_register:
11567 return "DW_CFA_register";
11568 case DW_CFA_remember_state:
11569 return "DW_CFA_remember_state";
11570 case DW_CFA_restore_state:
11571 return "DW_CFA_restore_state";
11572 case DW_CFA_def_cfa:
11573 return "DW_CFA_def_cfa";
11574 case DW_CFA_def_cfa_register:
11575 return "DW_CFA_def_cfa_register";
11576 case DW_CFA_def_cfa_offset:
11577 return "DW_CFA_def_cfa_offset";
11579 case DW_CFA_def_cfa_expression:
11580 return "DW_CFA_def_cfa_expression";
11581 case DW_CFA_expression:
11582 return "DW_CFA_expression";
11583 case DW_CFA_offset_extended_sf:
11584 return "DW_CFA_offset_extended_sf";
11585 case DW_CFA_def_cfa_sf:
11586 return "DW_CFA_def_cfa_sf";
11587 case DW_CFA_def_cfa_offset_sf:
11588 return "DW_CFA_def_cfa_offset_sf";
11589 case DW_CFA_val_offset:
11590 return "DW_CFA_val_offset";
11591 case DW_CFA_val_offset_sf:
11592 return "DW_CFA_val_offset_sf";
11593 case DW_CFA_val_expression:
11594 return "DW_CFA_val_expression";
11595 /* SGI/MIPS specific. */
11596 case DW_CFA_MIPS_advance_loc8:
11597 return "DW_CFA_MIPS_advance_loc8";
11598 /* GNU extensions. */
11599 case DW_CFA_GNU_window_save:
11600 return "DW_CFA_GNU_window_save";
11601 case DW_CFA_GNU_args_size:
11602 return "DW_CFA_GNU_args_size";
11603 case DW_CFA_GNU_negative_offset_extended:
11604 return "DW_CFA_GNU_negative_offset_extended";
11606 return "DW_CFA_<unknown>";
11612 dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
11616 print_spaces (indent, f);
11617 fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n",
11618 dwarf_tag_name (die->tag), die->abbrev, die->offset);
11620 if (die->parent != NULL)
11622 print_spaces (indent, f);
11623 fprintf_unfiltered (f, " parent at offset: 0x%x\n",
11624 die->parent->offset);
11627 print_spaces (indent, f);
11628 fprintf_unfiltered (f, " has children: %s\n",
11629 dwarf_bool_name (die->child != NULL));
11631 print_spaces (indent, f);
11632 fprintf_unfiltered (f, " attributes:\n");
11634 for (i = 0; i < die->num_attrs; ++i)
11636 print_spaces (indent, f);
11637 fprintf_unfiltered (f, " %s (%s) ",
11638 dwarf_attr_name (die->attrs[i].name),
11639 dwarf_form_name (die->attrs[i].form));
11641 switch (die->attrs[i].form)
11643 case DW_FORM_ref_addr:
11645 fprintf_unfiltered (f, "address: ");
11646 fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f);
11648 case DW_FORM_block2:
11649 case DW_FORM_block4:
11650 case DW_FORM_block:
11651 case DW_FORM_block1:
11652 fprintf_unfiltered (f, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
11654 case DW_FORM_exprloc:
11655 fprintf_unfiltered (f, "expression: size %u",
11656 DW_BLOCK (&die->attrs[i])->size);
11661 fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)",
11662 (long) (DW_ADDR (&die->attrs[i])));
11664 case DW_FORM_data1:
11665 case DW_FORM_data2:
11666 case DW_FORM_data4:
11667 case DW_FORM_data8:
11668 case DW_FORM_udata:
11669 case DW_FORM_sdata:
11670 fprintf_unfiltered (f, "constant: %s",
11671 pulongest (DW_UNSND (&die->attrs[i])));
11673 case DW_FORM_sec_offset:
11674 fprintf_unfiltered (f, "section offset: %s",
11675 pulongest (DW_UNSND (&die->attrs[i])));
11678 if (DW_SIGNATURED_TYPE (&die->attrs[i]) != NULL)
11679 fprintf_unfiltered (f, "signatured type, offset: 0x%x",
11680 DW_SIGNATURED_TYPE (&die->attrs[i])->offset);
11682 fprintf_unfiltered (f, "signatured type, offset: unknown");
11684 case DW_FORM_string:
11686 fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)",
11687 DW_STRING (&die->attrs[i])
11688 ? DW_STRING (&die->attrs[i]) : "",
11689 DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not");
11692 if (DW_UNSND (&die->attrs[i]))
11693 fprintf_unfiltered (f, "flag: TRUE");
11695 fprintf_unfiltered (f, "flag: FALSE");
11697 case DW_FORM_flag_present:
11698 fprintf_unfiltered (f, "flag: TRUE");
11700 case DW_FORM_indirect:
11701 /* the reader will have reduced the indirect form to
11702 the "base form" so this form should not occur */
11703 fprintf_unfiltered (f, "unexpected attribute form: DW_FORM_indirect");
11706 fprintf_unfiltered (f, "unsupported attribute form: %d.",
11707 die->attrs[i].form);
11710 fprintf_unfiltered (f, "\n");
11715 dump_die_for_error (struct die_info *die)
11717 dump_die_shallow (gdb_stderr, 0, die);
11721 dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die)
11723 int indent = level * 4;
11725 gdb_assert (die != NULL);
11727 if (level >= max_level)
11730 dump_die_shallow (f, indent, die);
11732 if (die->child != NULL)
11734 print_spaces (indent, f);
11735 fprintf_unfiltered (f, " Children:");
11736 if (level + 1 < max_level)
11738 fprintf_unfiltered (f, "\n");
11739 dump_die_1 (f, level + 1, max_level, die->child);
11743 fprintf_unfiltered (f, " [not printed, max nesting level reached]\n");
11747 if (die->sibling != NULL && level > 0)
11749 dump_die_1 (f, level, max_level, die->sibling);
11753 /* This is called from the pdie macro in gdbinit.in.
11754 It's not static so gcc will keep a copy callable from gdb. */
11757 dump_die (struct die_info *die, int max_level)
11759 dump_die_1 (gdb_stdlog, 0, max_level, die);
11763 store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu)
11767 slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset, INSERT);
11773 is_ref_attr (struct attribute *attr)
11775 switch (attr->form)
11777 case DW_FORM_ref_addr:
11782 case DW_FORM_ref_udata:
11789 static unsigned int
11790 dwarf2_get_ref_die_offset (struct attribute *attr)
11792 if (is_ref_attr (attr))
11793 return DW_ADDR (attr);
11795 complaint (&symfile_complaints,
11796 _("unsupported die ref attribute form: '%s'"),
11797 dwarf_form_name (attr->form));
11801 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
11802 * the value held by the attribute is not constant. */
11805 dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
11807 if (attr->form == DW_FORM_sdata)
11808 return DW_SND (attr);
11809 else if (attr->form == DW_FORM_udata
11810 || attr->form == DW_FORM_data1
11811 || attr->form == DW_FORM_data2
11812 || attr->form == DW_FORM_data4
11813 || attr->form == DW_FORM_data8)
11814 return DW_UNSND (attr);
11817 complaint (&symfile_complaints, _("Attribute value is not a constant (%s)"),
11818 dwarf_form_name (attr->form));
11819 return default_value;
11823 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
11824 unit and add it to our queue.
11825 The result is non-zero if PER_CU was queued, otherwise the result is zero
11826 meaning either PER_CU is already queued or it is already loaded. */
11829 maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
11830 struct dwarf2_per_cu_data *per_cu)
11832 /* Mark the dependence relation so that we don't flush PER_CU
11834 dwarf2_add_dependence (this_cu, per_cu);
11836 /* If it's already on the queue, we have nothing to do. */
11837 if (per_cu->queued)
11840 /* If the compilation unit is already loaded, just mark it as
11842 if (per_cu->cu != NULL)
11844 per_cu->cu->last_used = 0;
11848 /* Add it to the queue. */
11849 queue_comp_unit (per_cu, this_cu->objfile);
11854 /* Follow reference or signature attribute ATTR of SRC_DIE.
11855 On entry *REF_CU is the CU of SRC_DIE.
11856 On exit *REF_CU is the CU of the result. */
11858 static struct die_info *
11859 follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr,
11860 struct dwarf2_cu **ref_cu)
11862 struct die_info *die;
11864 if (is_ref_attr (attr))
11865 die = follow_die_ref (src_die, attr, ref_cu);
11866 else if (attr->form == DW_FORM_sig8)
11867 die = follow_die_sig (src_die, attr, ref_cu);
11870 dump_die_for_error (src_die);
11871 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
11872 (*ref_cu)->objfile->name);
11878 /* Follow reference OFFSET.
11879 On entry *REF_CU is the CU of source DIE referencing OFFSET.
11880 On exit *REF_CU is the CU of the result. */
11882 static struct die_info *
11883 follow_die_offset (unsigned int offset, struct dwarf2_cu **ref_cu)
11885 struct die_info temp_die;
11886 struct dwarf2_cu *target_cu, *cu = *ref_cu;
11888 gdb_assert (cu->per_cu != NULL);
11890 if (cu->per_cu->from_debug_types)
11892 /* .debug_types CUs cannot reference anything outside their CU.
11893 If they need to, they have to reference a signatured type via
11895 if (! offset_in_cu_p (&cu->header, offset))
11899 else if (! offset_in_cu_p (&cu->header, offset))
11901 struct dwarf2_per_cu_data *per_cu;
11903 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
11905 /* If necessary, add it to the queue and load its DIEs. */
11906 if (maybe_queue_comp_unit (cu, per_cu))
11907 load_full_comp_unit (per_cu, cu->objfile);
11909 target_cu = per_cu->cu;
11914 *ref_cu = target_cu;
11915 temp_die.offset = offset;
11916 return htab_find_with_hash (target_cu->die_hash, &temp_die, offset);
11919 /* Follow reference attribute ATTR of SRC_DIE.
11920 On entry *REF_CU is the CU of SRC_DIE.
11921 On exit *REF_CU is the CU of the result. */
11923 static struct die_info *
11924 follow_die_ref (struct die_info *src_die, struct attribute *attr,
11925 struct dwarf2_cu **ref_cu)
11927 unsigned int offset = dwarf2_get_ref_die_offset (attr);
11928 struct dwarf2_cu *cu = *ref_cu;
11929 struct die_info *die;
11931 die = follow_die_offset (offset, ref_cu);
11933 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
11934 "at 0x%x [in module %s]"),
11935 offset, src_die->offset, cu->objfile->name);
11940 /* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
11941 value is intended for DW_OP_call*. */
11943 struct dwarf2_locexpr_baton
11944 dwarf2_fetch_die_location_block (unsigned int offset,
11945 struct dwarf2_per_cu_data *per_cu)
11947 struct dwarf2_cu *cu = per_cu->cu;
11948 struct die_info *die;
11949 struct attribute *attr;
11950 struct dwarf2_locexpr_baton retval;
11952 die = follow_die_offset (offset, &cu);
11954 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
11955 offset, per_cu->cu->objfile->name);
11957 attr = dwarf2_attr (die, DW_AT_location, cu);
11960 /* DWARF: "If there is no such attribute, then there is no effect.". */
11962 retval.data = NULL;
11967 if (!attr_form_is_block (attr))
11968 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
11969 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
11970 offset, per_cu->cu->objfile->name);
11972 retval.data = DW_BLOCK (attr)->data;
11973 retval.size = DW_BLOCK (attr)->size;
11975 retval.per_cu = cu->per_cu;
11979 /* Follow the signature attribute ATTR in SRC_DIE.
11980 On entry *REF_CU is the CU of SRC_DIE.
11981 On exit *REF_CU is the CU of the result. */
11983 static struct die_info *
11984 follow_die_sig (struct die_info *src_die, struct attribute *attr,
11985 struct dwarf2_cu **ref_cu)
11987 struct objfile *objfile = (*ref_cu)->objfile;
11988 struct die_info temp_die;
11989 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
11990 struct dwarf2_cu *sig_cu;
11991 struct die_info *die;
11993 /* sig_type will be NULL if the signatured type is missing from
11995 if (sig_type == NULL)
11996 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
11997 "at 0x%x [in module %s]"),
11998 src_die->offset, objfile->name);
12000 /* If necessary, add it to the queue and load its DIEs. */
12002 if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu))
12003 read_signatured_type (objfile, sig_type);
12005 gdb_assert (sig_type->per_cu.cu != NULL);
12007 sig_cu = sig_type->per_cu.cu;
12008 temp_die.offset = sig_cu->header.offset + sig_type->type_offset;
12009 die = htab_find_with_hash (sig_cu->die_hash, &temp_die, temp_die.offset);
12016 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
12017 "at 0x%x [in module %s]"),
12018 sig_type->type_offset, src_die->offset, objfile->name);
12021 /* Given an offset of a signatured type, return its signatured_type. */
12023 static struct signatured_type *
12024 lookup_signatured_type_at_offset (struct objfile *objfile, unsigned int offset)
12026 gdb_byte *info_ptr = dwarf2_per_objfile->types.buffer + offset;
12027 unsigned int length, initial_length_size;
12028 unsigned int sig_offset;
12029 struct signatured_type find_entry, *type_sig;
12031 length = read_initial_length (objfile->obfd, info_ptr, &initial_length_size);
12032 sig_offset = (initial_length_size
12034 + (initial_length_size == 4 ? 4 : 8) /*debug_abbrev_offset*/
12035 + 1 /*address_size*/);
12036 find_entry.signature = bfd_get_64 (objfile->obfd, info_ptr + sig_offset);
12037 type_sig = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
12039 /* This is only used to lookup previously recorded types.
12040 If we didn't find it, it's our bug. */
12041 gdb_assert (type_sig != NULL);
12042 gdb_assert (offset == type_sig->offset);
12047 /* Read in signatured type at OFFSET and build its CU and die(s). */
12050 read_signatured_type_at_offset (struct objfile *objfile,
12051 unsigned int offset)
12053 struct signatured_type *type_sig;
12055 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
12057 /* We have the section offset, but we need the signature to do the
12058 hash table lookup. */
12059 type_sig = lookup_signatured_type_at_offset (objfile, offset);
12061 gdb_assert (type_sig->per_cu.cu == NULL);
12063 read_signatured_type (objfile, type_sig);
12065 gdb_assert (type_sig->per_cu.cu != NULL);
12068 /* Read in a signatured type and build its CU and DIEs. */
12071 read_signatured_type (struct objfile *objfile,
12072 struct signatured_type *type_sig)
12074 gdb_byte *types_ptr = dwarf2_per_objfile->types.buffer + type_sig->offset;
12075 struct die_reader_specs reader_specs;
12076 struct dwarf2_cu *cu;
12077 ULONGEST signature;
12078 struct cleanup *back_to, *free_cu_cleanup;
12079 struct attribute *attr;
12081 gdb_assert (type_sig->per_cu.cu == NULL);
12083 cu = xmalloc (sizeof (struct dwarf2_cu));
12084 memset (cu, 0, sizeof (struct dwarf2_cu));
12085 obstack_init (&cu->comp_unit_obstack);
12086 cu->objfile = objfile;
12087 type_sig->per_cu.cu = cu;
12088 cu->per_cu = &type_sig->per_cu;
12090 /* If an error occurs while loading, release our storage. */
12091 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
12093 types_ptr = read_type_comp_unit_head (&cu->header, &signature,
12094 types_ptr, objfile->obfd);
12095 gdb_assert (signature == type_sig->signature);
12098 = htab_create_alloc_ex (cu->header.length / 12,
12102 &cu->comp_unit_obstack,
12103 hashtab_obstack_allocate,
12104 dummy_obstack_deallocate);
12106 dwarf2_read_abbrevs (cu->objfile->obfd, cu);
12107 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
12109 init_cu_die_reader (&reader_specs, cu);
12111 cu->dies = read_die_and_children (&reader_specs, types_ptr, &types_ptr,
12114 /* We try not to read any attributes in this function, because not
12115 all objfiles needed for references have been loaded yet, and symbol
12116 table processing isn't initialized. But we have to set the CU language,
12117 or we won't be able to build types correctly. */
12118 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
12120 set_cu_language (DW_UNSND (attr), cu);
12122 set_cu_language (language_minimal, cu);
12124 do_cleanups (back_to);
12126 /* We've successfully allocated this compilation unit. Let our caller
12127 clean it up when finished with it. */
12128 discard_cleanups (free_cu_cleanup);
12130 type_sig->per_cu.cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
12131 dwarf2_per_objfile->read_in_chain = &type_sig->per_cu;
12134 /* Decode simple location descriptions.
12135 Given a pointer to a dwarf block that defines a location, compute
12136 the location and return the value.
12138 NOTE drow/2003-11-18: This function is called in two situations
12139 now: for the address of static or global variables (partial symbols
12140 only) and for offsets into structures which are expected to be
12141 (more or less) constant. The partial symbol case should go away,
12142 and only the constant case should remain. That will let this
12143 function complain more accurately. A few special modes are allowed
12144 without complaint for global variables (for instance, global
12145 register values and thread-local values).
12147 A location description containing no operations indicates that the
12148 object is optimized out. The return value is 0 for that case.
12149 FIXME drow/2003-11-16: No callers check for this case any more; soon all
12150 callers will only want a very basic result and this can become a
12153 Note that stack[0] is unused except as a default error return.
12154 Note that stack overflow is not yet handled. */
12157 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
12159 struct objfile *objfile = cu->objfile;
12161 int size = blk->size;
12162 gdb_byte *data = blk->data;
12163 CORE_ADDR stack[64];
12165 unsigned int bytes_read, unsnd;
12209 stack[++stacki] = op - DW_OP_lit0;
12244 stack[++stacki] = op - DW_OP_reg0;
12246 dwarf2_complex_location_expr_complaint ();
12250 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
12252 stack[++stacki] = unsnd;
12254 dwarf2_complex_location_expr_complaint ();
12258 stack[++stacki] = read_address (objfile->obfd, &data[i],
12263 case DW_OP_const1u:
12264 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
12268 case DW_OP_const1s:
12269 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
12273 case DW_OP_const2u:
12274 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
12278 case DW_OP_const2s:
12279 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
12283 case DW_OP_const4u:
12284 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
12288 case DW_OP_const4s:
12289 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
12294 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
12300 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
12305 stack[stacki + 1] = stack[stacki];
12310 stack[stacki - 1] += stack[stacki];
12314 case DW_OP_plus_uconst:
12315 stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
12320 stack[stacki - 1] -= stack[stacki];
12325 /* If we're not the last op, then we definitely can't encode
12326 this using GDB's address_class enum. This is valid for partial
12327 global symbols, although the variable's address will be bogus
12330 dwarf2_complex_location_expr_complaint ();
12333 case DW_OP_GNU_push_tls_address:
12334 /* The top of the stack has the offset from the beginning
12335 of the thread control block at which the variable is located. */
12336 /* Nothing should follow this operator, so the top of stack would
12338 /* This is valid for partial global symbols, but the variable's
12339 address will be bogus in the psymtab. */
12341 dwarf2_complex_location_expr_complaint ();
12344 case DW_OP_GNU_uninit:
12348 complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
12349 dwarf_stack_op_name (op, 1));
12350 return (stack[stacki]);
12353 return (stack[stacki]);
12356 /* memory allocation interface */
12358 static struct dwarf_block *
12359 dwarf_alloc_block (struct dwarf2_cu *cu)
12361 struct dwarf_block *blk;
12363 blk = (struct dwarf_block *)
12364 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
12368 static struct abbrev_info *
12369 dwarf_alloc_abbrev (struct dwarf2_cu *cu)
12371 struct abbrev_info *abbrev;
12373 abbrev = (struct abbrev_info *)
12374 obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info));
12375 memset (abbrev, 0, sizeof (struct abbrev_info));
12379 static struct die_info *
12380 dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs)
12382 struct die_info *die;
12383 size_t size = sizeof (struct die_info);
12386 size += (num_attrs - 1) * sizeof (struct attribute);
12388 die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size);
12389 memset (die, 0, sizeof (struct die_info));
12394 /* Macro support. */
12397 /* Return the full name of file number I in *LH's file name table.
12398 Use COMP_DIR as the name of the current directory of the
12399 compilation. The result is allocated using xmalloc; the caller is
12400 responsible for freeing it. */
12402 file_full_name (int file, struct line_header *lh, const char *comp_dir)
12404 /* Is the file number a valid index into the line header's file name
12405 table? Remember that file numbers start with one, not zero. */
12406 if (1 <= file && file <= lh->num_file_names)
12408 struct file_entry *fe = &lh->file_names[file - 1];
12410 if (IS_ABSOLUTE_PATH (fe->name))
12411 return xstrdup (fe->name);
12419 dir = lh->include_dirs[fe->dir_index - 1];
12425 dir_len = strlen (dir);
12426 full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
12427 strcpy (full_name, dir);
12428 full_name[dir_len] = '/';
12429 strcpy (full_name + dir_len + 1, fe->name);
12433 return xstrdup (fe->name);
12438 /* The compiler produced a bogus file number. We can at least
12439 record the macro definitions made in the file, even if we
12440 won't be able to find the file by name. */
12441 char fake_name[80];
12443 sprintf (fake_name, "<bad macro file number %d>", file);
12445 complaint (&symfile_complaints,
12446 _("bad file number in macro information (%d)"),
12449 return xstrdup (fake_name);
12454 static struct macro_source_file *
12455 macro_start_file (int file, int line,
12456 struct macro_source_file *current_file,
12457 const char *comp_dir,
12458 struct line_header *lh, struct objfile *objfile)
12460 /* The full name of this source file. */
12461 char *full_name = file_full_name (file, lh, comp_dir);
12463 /* We don't create a macro table for this compilation unit
12464 at all until we actually get a filename. */
12465 if (! pending_macros)
12466 pending_macros = new_macro_table (&objfile->objfile_obstack,
12467 objfile->macro_cache);
12469 if (! current_file)
12470 /* If we have no current file, then this must be the start_file
12471 directive for the compilation unit's main source file. */
12472 current_file = macro_set_main (pending_macros, full_name);
12474 current_file = macro_include (current_file, line, full_name);
12478 return current_file;
12482 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
12483 followed by a null byte. */
12485 copy_string (const char *buf, int len)
12487 char *s = xmalloc (len + 1);
12489 memcpy (s, buf, len);
12495 static const char *
12496 consume_improper_spaces (const char *p, const char *body)
12500 complaint (&symfile_complaints,
12501 _("macro definition contains spaces in formal argument list:\n`%s'"),
12513 parse_macro_definition (struct macro_source_file *file, int line,
12518 /* The body string takes one of two forms. For object-like macro
12519 definitions, it should be:
12521 <macro name> " " <definition>
12523 For function-like macro definitions, it should be:
12525 <macro name> "() " <definition>
12527 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
12529 Spaces may appear only where explicitly indicated, and in the
12532 The Dwarf 2 spec says that an object-like macro's name is always
12533 followed by a space, but versions of GCC around March 2002 omit
12534 the space when the macro's definition is the empty string.
12536 The Dwarf 2 spec says that there should be no spaces between the
12537 formal arguments in a function-like macro's formal argument list,
12538 but versions of GCC around March 2002 include spaces after the
12542 /* Find the extent of the macro name. The macro name is terminated
12543 by either a space or null character (for an object-like macro) or
12544 an opening paren (for a function-like macro). */
12545 for (p = body; *p; p++)
12546 if (*p == ' ' || *p == '(')
12549 if (*p == ' ' || *p == '\0')
12551 /* It's an object-like macro. */
12552 int name_len = p - body;
12553 char *name = copy_string (body, name_len);
12554 const char *replacement;
12557 replacement = body + name_len + 1;
12560 dwarf2_macro_malformed_definition_complaint (body);
12561 replacement = body + name_len;
12564 macro_define_object (file, line, name, replacement);
12568 else if (*p == '(')
12570 /* It's a function-like macro. */
12571 char *name = copy_string (body, p - body);
12574 char **argv = xmalloc (argv_size * sizeof (*argv));
12578 p = consume_improper_spaces (p, body);
12580 /* Parse the formal argument list. */
12581 while (*p && *p != ')')
12583 /* Find the extent of the current argument name. */
12584 const char *arg_start = p;
12586 while (*p && *p != ',' && *p != ')' && *p != ' ')
12589 if (! *p || p == arg_start)
12590 dwarf2_macro_malformed_definition_complaint (body);
12593 /* Make sure argv has room for the new argument. */
12594 if (argc >= argv_size)
12597 argv = xrealloc (argv, argv_size * sizeof (*argv));
12600 argv[argc++] = copy_string (arg_start, p - arg_start);
12603 p = consume_improper_spaces (p, body);
12605 /* Consume the comma, if present. */
12610 p = consume_improper_spaces (p, body);
12619 /* Perfectly formed definition, no complaints. */
12620 macro_define_function (file, line, name,
12621 argc, (const char **) argv,
12623 else if (*p == '\0')
12625 /* Complain, but do define it. */
12626 dwarf2_macro_malformed_definition_complaint (body);
12627 macro_define_function (file, line, name,
12628 argc, (const char **) argv,
12632 /* Just complain. */
12633 dwarf2_macro_malformed_definition_complaint (body);
12636 /* Just complain. */
12637 dwarf2_macro_malformed_definition_complaint (body);
12643 for (i = 0; i < argc; i++)
12649 dwarf2_macro_malformed_definition_complaint (body);
12654 dwarf_decode_macros (struct line_header *lh, unsigned int offset,
12655 char *comp_dir, bfd *abfd,
12656 struct dwarf2_cu *cu)
12658 gdb_byte *mac_ptr, *mac_end;
12659 struct macro_source_file *current_file = 0;
12660 enum dwarf_macinfo_record_type macinfo_type;
12661 int at_commandline;
12663 dwarf2_read_section (dwarf2_per_objfile->objfile,
12664 &dwarf2_per_objfile->macinfo);
12665 if (dwarf2_per_objfile->macinfo.buffer == NULL)
12667 complaint (&symfile_complaints, _("missing .debug_macinfo section"));
12671 /* First pass: Find the name of the base filename.
12672 This filename is needed in order to process all macros whose definition
12673 (or undefinition) comes from the command line. These macros are defined
12674 before the first DW_MACINFO_start_file entry, and yet still need to be
12675 associated to the base file.
12677 To determine the base file name, we scan the macro definitions until we
12678 reach the first DW_MACINFO_start_file entry. We then initialize
12679 CURRENT_FILE accordingly so that any macro definition found before the
12680 first DW_MACINFO_start_file can still be associated to the base file. */
12682 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
12683 mac_end = dwarf2_per_objfile->macinfo.buffer
12684 + dwarf2_per_objfile->macinfo.size;
12688 /* Do we at least have room for a macinfo type byte? */
12689 if (mac_ptr >= mac_end)
12691 /* Complaint is printed during the second pass as GDB will probably
12692 stop the first pass earlier upon finding DW_MACINFO_start_file. */
12696 macinfo_type = read_1_byte (abfd, mac_ptr);
12699 switch (macinfo_type)
12701 /* A zero macinfo type indicates the end of the macro
12706 case DW_MACINFO_define:
12707 case DW_MACINFO_undef:
12708 /* Only skip the data by MAC_PTR. */
12710 unsigned int bytes_read;
12712 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
12713 mac_ptr += bytes_read;
12714 read_string (abfd, mac_ptr, &bytes_read);
12715 mac_ptr += bytes_read;
12719 case DW_MACINFO_start_file:
12721 unsigned int bytes_read;
12724 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
12725 mac_ptr += bytes_read;
12726 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
12727 mac_ptr += bytes_read;
12729 current_file = macro_start_file (file, line, current_file, comp_dir,
12734 case DW_MACINFO_end_file:
12735 /* No data to skip by MAC_PTR. */
12738 case DW_MACINFO_vendor_ext:
12739 /* Only skip the data by MAC_PTR. */
12741 unsigned int bytes_read;
12743 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
12744 mac_ptr += bytes_read;
12745 read_string (abfd, mac_ptr, &bytes_read);
12746 mac_ptr += bytes_read;
12753 } while (macinfo_type != 0 && current_file == NULL);
12755 /* Second pass: Process all entries.
12757 Use the AT_COMMAND_LINE flag to determine whether we are still processing
12758 command-line macro definitions/undefinitions. This flag is unset when we
12759 reach the first DW_MACINFO_start_file entry. */
12761 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
12763 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
12764 GDB is still reading the definitions from command line. First
12765 DW_MACINFO_start_file will need to be ignored as it was already executed
12766 to create CURRENT_FILE for the main source holding also the command line
12767 definitions. On first met DW_MACINFO_start_file this flag is reset to
12768 normally execute all the remaining DW_MACINFO_start_file macinfos. */
12770 at_commandline = 1;
12774 /* Do we at least have room for a macinfo type byte? */
12775 if (mac_ptr >= mac_end)
12777 dwarf2_macros_too_long_complaint ();
12781 macinfo_type = read_1_byte (abfd, mac_ptr);
12784 switch (macinfo_type)
12786 /* A zero macinfo type indicates the end of the macro
12791 case DW_MACINFO_define:
12792 case DW_MACINFO_undef:
12794 unsigned int bytes_read;
12798 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
12799 mac_ptr += bytes_read;
12800 body = read_string (abfd, mac_ptr, &bytes_read);
12801 mac_ptr += bytes_read;
12803 if (! current_file)
12805 /* DWARF violation as no main source is present. */
12806 complaint (&symfile_complaints,
12807 _("debug info with no main source gives macro %s "
12809 macinfo_type == DW_MACINFO_define ?
12811 macinfo_type == DW_MACINFO_undef ?
12812 _("undefinition") :
12813 _("something-or-other"), line, body);
12816 if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
12817 complaint (&symfile_complaints,
12818 _("debug info gives %s macro %s with %s line %d: %s"),
12819 at_commandline ? _("command-line") : _("in-file"),
12820 macinfo_type == DW_MACINFO_define ?
12822 macinfo_type == DW_MACINFO_undef ?
12823 _("undefinition") :
12824 _("something-or-other"),
12825 line == 0 ? _("zero") : _("non-zero"), line, body);
12827 if (macinfo_type == DW_MACINFO_define)
12828 parse_macro_definition (current_file, line, body);
12829 else if (macinfo_type == DW_MACINFO_undef)
12830 macro_undef (current_file, line, body);
12834 case DW_MACINFO_start_file:
12836 unsigned int bytes_read;
12839 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
12840 mac_ptr += bytes_read;
12841 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
12842 mac_ptr += bytes_read;
12844 if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
12845 complaint (&symfile_complaints,
12846 _("debug info gives source %d included "
12847 "from %s at %s line %d"),
12848 file, at_commandline ? _("command-line") : _("file"),
12849 line == 0 ? _("zero") : _("non-zero"), line);
12851 if (at_commandline)
12853 /* This DW_MACINFO_start_file was executed in the pass one. */
12854 at_commandline = 0;
12857 current_file = macro_start_file (file, line,
12858 current_file, comp_dir,
12863 case DW_MACINFO_end_file:
12864 if (! current_file)
12865 complaint (&symfile_complaints,
12866 _("macro debug info has an unmatched `close_file' directive"));
12869 current_file = current_file->included_by;
12870 if (! current_file)
12872 enum dwarf_macinfo_record_type next_type;
12874 /* GCC circa March 2002 doesn't produce the zero
12875 type byte marking the end of the compilation
12876 unit. Complain if it's not there, but exit no
12879 /* Do we at least have room for a macinfo type byte? */
12880 if (mac_ptr >= mac_end)
12882 dwarf2_macros_too_long_complaint ();
12886 /* We don't increment mac_ptr here, so this is just
12888 next_type = read_1_byte (abfd, mac_ptr);
12889 if (next_type != 0)
12890 complaint (&symfile_complaints,
12891 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
12898 case DW_MACINFO_vendor_ext:
12900 unsigned int bytes_read;
12904 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
12905 mac_ptr += bytes_read;
12906 string = read_string (abfd, mac_ptr, &bytes_read);
12907 mac_ptr += bytes_read;
12909 /* We don't recognize any vendor extensions. */
12913 } while (macinfo_type != 0);
12916 /* Check if the attribute's form is a DW_FORM_block*
12917 if so return true else false. */
12919 attr_form_is_block (struct attribute *attr)
12921 return (attr == NULL ? 0 :
12922 attr->form == DW_FORM_block1
12923 || attr->form == DW_FORM_block2
12924 || attr->form == DW_FORM_block4
12925 || attr->form == DW_FORM_block
12926 || attr->form == DW_FORM_exprloc);
12929 /* Return non-zero if ATTR's value is a section offset --- classes
12930 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
12931 You may use DW_UNSND (attr) to retrieve such offsets.
12933 Section 7.5.4, "Attribute Encodings", explains that no attribute
12934 may have a value that belongs to more than one of these classes; it
12935 would be ambiguous if we did, because we use the same forms for all
12938 attr_form_is_section_offset (struct attribute *attr)
12940 return (attr->form == DW_FORM_data4
12941 || attr->form == DW_FORM_data8
12942 || attr->form == DW_FORM_sec_offset);
12946 /* Return non-zero if ATTR's value falls in the 'constant' class, or
12947 zero otherwise. When this function returns true, you can apply
12948 dwarf2_get_attr_constant_value to it.
12950 However, note that for some attributes you must check
12951 attr_form_is_section_offset before using this test. DW_FORM_data4
12952 and DW_FORM_data8 are members of both the constant class, and of
12953 the classes that contain offsets into other debug sections
12954 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
12955 that, if an attribute's can be either a constant or one of the
12956 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
12957 taken as section offsets, not constants. */
12959 attr_form_is_constant (struct attribute *attr)
12961 switch (attr->form)
12963 case DW_FORM_sdata:
12964 case DW_FORM_udata:
12965 case DW_FORM_data1:
12966 case DW_FORM_data2:
12967 case DW_FORM_data4:
12968 case DW_FORM_data8:
12976 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
12977 struct dwarf2_cu *cu)
12979 if (attr_form_is_section_offset (attr)
12980 /* ".debug_loc" may not exist at all, or the offset may be outside
12981 the section. If so, fall through to the complaint in the
12983 && DW_UNSND (attr) < dwarf2_per_objfile->loc.size)
12985 struct dwarf2_loclist_baton *baton;
12987 baton = obstack_alloc (&cu->objfile->objfile_obstack,
12988 sizeof (struct dwarf2_loclist_baton));
12989 baton->per_cu = cu->per_cu;
12990 gdb_assert (baton->per_cu);
12992 dwarf2_read_section (dwarf2_per_objfile->objfile,
12993 &dwarf2_per_objfile->loc);
12995 /* We don't know how long the location list is, but make sure we
12996 don't run off the edge of the section. */
12997 baton->size = dwarf2_per_objfile->loc.size - DW_UNSND (attr);
12998 baton->data = dwarf2_per_objfile->loc.buffer + DW_UNSND (attr);
12999 baton->base_address = cu->base_address;
13000 if (cu->base_known == 0)
13001 complaint (&symfile_complaints,
13002 _("Location list used without specifying the CU base address."));
13004 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_loclist_funcs;
13005 SYMBOL_LOCATION_BATON (sym) = baton;
13009 struct dwarf2_locexpr_baton *baton;
13011 baton = obstack_alloc (&cu->objfile->objfile_obstack,
13012 sizeof (struct dwarf2_locexpr_baton));
13013 baton->per_cu = cu->per_cu;
13014 gdb_assert (baton->per_cu);
13016 if (attr_form_is_block (attr))
13018 /* Note that we're just copying the block's data pointer
13019 here, not the actual data. We're still pointing into the
13020 info_buffer for SYM's objfile; right now we never release
13021 that buffer, but when we do clean up properly this may
13023 baton->size = DW_BLOCK (attr)->size;
13024 baton->data = DW_BLOCK (attr)->data;
13028 dwarf2_invalid_attrib_class_complaint ("location description",
13029 SYMBOL_NATURAL_NAME (sym));
13031 baton->data = NULL;
13034 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
13035 SYMBOL_LOCATION_BATON (sym) = baton;
13039 /* Return the OBJFILE associated with the compilation unit CU. If CU
13040 came from a separate debuginfo file, then the master objfile is
13044 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu)
13046 struct objfile *objfile = per_cu->objfile;
13048 /* Return the master objfile, so that we can report and look up the
13049 correct file containing this variable. */
13050 if (objfile->separate_debug_objfile_backlink)
13051 objfile = objfile->separate_debug_objfile_backlink;
13056 /* Return the address size given in the compilation unit header for CU. */
13059 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu)
13062 return per_cu->cu->header.addr_size;
13065 /* If the CU is not currently read in, we re-read its header. */
13066 struct objfile *objfile = per_cu->objfile;
13067 struct dwarf2_per_objfile *per_objfile
13068 = objfile_data (objfile, dwarf2_objfile_data_key);
13069 gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
13070 struct comp_unit_head cu_header;
13072 memset (&cu_header, 0, sizeof cu_header);
13073 read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
13074 return cu_header.addr_size;
13078 /* Return the offset size given in the compilation unit header for CU. */
13081 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu)
13084 return per_cu->cu->header.offset_size;
13087 /* If the CU is not currently read in, we re-read its header. */
13088 struct objfile *objfile = per_cu->objfile;
13089 struct dwarf2_per_objfile *per_objfile
13090 = objfile_data (objfile, dwarf2_objfile_data_key);
13091 gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
13092 struct comp_unit_head cu_header;
13094 memset (&cu_header, 0, sizeof cu_header);
13095 read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
13096 return cu_header.offset_size;
13100 /* Return the text offset of the CU. The returned offset comes from
13101 this CU's objfile. If this objfile came from a separate debuginfo
13102 file, then the offset may be different from the corresponding
13103 offset in the parent objfile. */
13106 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu)
13108 struct objfile *objfile = per_cu->objfile;
13110 return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
13113 /* Locate the .debug_info compilation unit from CU's objfile which contains
13114 the DIE at OFFSET. Raises an error on failure. */
13116 static struct dwarf2_per_cu_data *
13117 dwarf2_find_containing_comp_unit (unsigned int offset,
13118 struct objfile *objfile)
13120 struct dwarf2_per_cu_data *this_cu;
13124 high = dwarf2_per_objfile->n_comp_units - 1;
13127 int mid = low + (high - low) / 2;
13129 if (dwarf2_per_objfile->all_comp_units[mid]->offset >= offset)
13134 gdb_assert (low == high);
13135 if (dwarf2_per_objfile->all_comp_units[low]->offset > offset)
13138 error (_("Dwarf Error: could not find partial DIE containing "
13139 "offset 0x%lx [in module %s]"),
13140 (long) offset, bfd_get_filename (objfile->obfd));
13142 gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset <= offset);
13143 return dwarf2_per_objfile->all_comp_units[low-1];
13147 this_cu = dwarf2_per_objfile->all_comp_units[low];
13148 if (low == dwarf2_per_objfile->n_comp_units - 1
13149 && offset >= this_cu->offset + this_cu->length)
13150 error (_("invalid dwarf2 offset %u"), offset);
13151 gdb_assert (offset < this_cu->offset + this_cu->length);
13156 /* Locate the compilation unit from OBJFILE which is located at exactly
13157 OFFSET. Raises an error on failure. */
13159 static struct dwarf2_per_cu_data *
13160 dwarf2_find_comp_unit (unsigned int offset, struct objfile *objfile)
13162 struct dwarf2_per_cu_data *this_cu;
13164 this_cu = dwarf2_find_containing_comp_unit (offset, objfile);
13165 if (this_cu->offset != offset)
13166 error (_("no compilation unit with offset %u."), offset);
13170 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
13172 static struct dwarf2_cu *
13173 alloc_one_comp_unit (struct objfile *objfile)
13175 struct dwarf2_cu *cu = xcalloc (1, sizeof (struct dwarf2_cu));
13176 cu->objfile = objfile;
13177 obstack_init (&cu->comp_unit_obstack);
13181 /* Release one cached compilation unit, CU. We unlink it from the tree
13182 of compilation units, but we don't remove it from the read_in_chain;
13183 the caller is responsible for that.
13184 NOTE: DATA is a void * because this function is also used as a
13185 cleanup routine. */
13188 free_one_comp_unit (void *data)
13190 struct dwarf2_cu *cu = data;
13192 if (cu->per_cu != NULL)
13193 cu->per_cu->cu = NULL;
13196 obstack_free (&cu->comp_unit_obstack, NULL);
13201 /* This cleanup function is passed the address of a dwarf2_cu on the stack
13202 when we're finished with it. We can't free the pointer itself, but be
13203 sure to unlink it from the cache. Also release any associated storage
13204 and perform cache maintenance.
13206 Only used during partial symbol parsing. */
13209 free_stack_comp_unit (void *data)
13211 struct dwarf2_cu *cu = data;
13213 obstack_free (&cu->comp_unit_obstack, NULL);
13214 cu->partial_dies = NULL;
13216 if (cu->per_cu != NULL)
13218 /* This compilation unit is on the stack in our caller, so we
13219 should not xfree it. Just unlink it. */
13220 cu->per_cu->cu = NULL;
13223 /* If we had a per-cu pointer, then we may have other compilation
13224 units loaded, so age them now. */
13225 age_cached_comp_units ();
13229 /* Free all cached compilation units. */
13232 free_cached_comp_units (void *data)
13234 struct dwarf2_per_cu_data *per_cu, **last_chain;
13236 per_cu = dwarf2_per_objfile->read_in_chain;
13237 last_chain = &dwarf2_per_objfile->read_in_chain;
13238 while (per_cu != NULL)
13240 struct dwarf2_per_cu_data *next_cu;
13242 next_cu = per_cu->cu->read_in_chain;
13244 free_one_comp_unit (per_cu->cu);
13245 *last_chain = next_cu;
13251 /* Increase the age counter on each cached compilation unit, and free
13252 any that are too old. */
13255 age_cached_comp_units (void)
13257 struct dwarf2_per_cu_data *per_cu, **last_chain;
13259 dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
13260 per_cu = dwarf2_per_objfile->read_in_chain;
13261 while (per_cu != NULL)
13263 per_cu->cu->last_used ++;
13264 if (per_cu->cu->last_used <= dwarf2_max_cache_age)
13265 dwarf2_mark (per_cu->cu);
13266 per_cu = per_cu->cu->read_in_chain;
13269 per_cu = dwarf2_per_objfile->read_in_chain;
13270 last_chain = &dwarf2_per_objfile->read_in_chain;
13271 while (per_cu != NULL)
13273 struct dwarf2_per_cu_data *next_cu;
13275 next_cu = per_cu->cu->read_in_chain;
13277 if (!per_cu->cu->mark)
13279 free_one_comp_unit (per_cu->cu);
13280 *last_chain = next_cu;
13283 last_chain = &per_cu->cu->read_in_chain;
13289 /* Remove a single compilation unit from the cache. */
13292 free_one_cached_comp_unit (void *target_cu)
13294 struct dwarf2_per_cu_data *per_cu, **last_chain;
13296 per_cu = dwarf2_per_objfile->read_in_chain;
13297 last_chain = &dwarf2_per_objfile->read_in_chain;
13298 while (per_cu != NULL)
13300 struct dwarf2_per_cu_data *next_cu;
13302 next_cu = per_cu->cu->read_in_chain;
13304 if (per_cu->cu == target_cu)
13306 free_one_comp_unit (per_cu->cu);
13307 *last_chain = next_cu;
13311 last_chain = &per_cu->cu->read_in_chain;
13317 /* Release all extra memory associated with OBJFILE. */
13320 dwarf2_free_objfile (struct objfile *objfile)
13322 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
13324 if (dwarf2_per_objfile == NULL)
13327 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
13328 free_cached_comp_units (NULL);
13330 if (dwarf2_per_objfile->using_index)
13334 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
13337 struct dwarf2_per_cu_data *cu = dwarf2_per_objfile->all_comp_units[i];
13339 if (!cu->v.quick->lines)
13342 for (j = 0; j < cu->v.quick->lines->num_file_names; ++j)
13344 if (cu->v.quick->file_names)
13345 xfree ((void *) cu->v.quick->file_names[j]);
13346 if (cu->v.quick->full_names)
13347 xfree ((void *) cu->v.quick->full_names[j]);
13350 free_line_header (cu->v.quick->lines);
13354 /* Everything else should be on the objfile obstack. */
13357 /* A pair of DIE offset and GDB type pointer. We store these
13358 in a hash table separate from the DIEs, and preserve them
13359 when the DIEs are flushed out of cache. */
13361 struct dwarf2_offset_and_type
13363 unsigned int offset;
13367 /* Hash function for a dwarf2_offset_and_type. */
13370 offset_and_type_hash (const void *item)
13372 const struct dwarf2_offset_and_type *ofs = item;
13374 return ofs->offset;
13377 /* Equality function for a dwarf2_offset_and_type. */
13380 offset_and_type_eq (const void *item_lhs, const void *item_rhs)
13382 const struct dwarf2_offset_and_type *ofs_lhs = item_lhs;
13383 const struct dwarf2_offset_and_type *ofs_rhs = item_rhs;
13385 return ofs_lhs->offset == ofs_rhs->offset;
13388 /* Set the type associated with DIE to TYPE. Save it in CU's hash
13389 table if necessary. For convenience, return TYPE.
13391 The DIEs reading must have careful ordering to:
13392 * Not cause infite loops trying to read in DIEs as a prerequisite for
13393 reading current DIE.
13394 * Not trying to dereference contents of still incompletely read in types
13395 while reading in other DIEs.
13396 * Enable referencing still incompletely read in types just by a pointer to
13397 the type without accessing its fields.
13399 Therefore caller should follow these rules:
13400 * Try to fetch any prerequisite types we may need to build this DIE type
13401 before building the type and calling set_die_type.
13402 * After building typer call set_die_type for current DIE as soon as
13403 possible before fetching more types to complete the current type.
13404 * Make the type as complete as possible before fetching more types. */
13406 static struct type *
13407 set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
13409 struct dwarf2_offset_and_type **slot, ofs;
13411 /* For Ada types, make sure that the gnat-specific data is always
13412 initialized (if not already set). There are a few types where
13413 we should not be doing so, because the type-specific area is
13414 already used to hold some other piece of info (eg: TYPE_CODE_FLT
13415 where the type-specific area is used to store the floatformat).
13416 But this is not a problem, because the gnat-specific information
13417 is actually not needed for these types. */
13418 if (need_gnat_info (cu)
13419 && TYPE_CODE (type) != TYPE_CODE_FUNC
13420 && TYPE_CODE (type) != TYPE_CODE_FLT
13421 && !HAVE_GNAT_AUX_INFO (type))
13422 INIT_GNAT_SPECIFIC (type);
13424 if (cu->type_hash == NULL)
13426 gdb_assert (cu->per_cu != NULL);
13427 cu->per_cu->type_hash
13428 = htab_create_alloc_ex (cu->header.length / 24,
13429 offset_and_type_hash,
13430 offset_and_type_eq,
13432 &cu->objfile->objfile_obstack,
13433 hashtab_obstack_allocate,
13434 dummy_obstack_deallocate);
13435 cu->type_hash = cu->per_cu->type_hash;
13438 ofs.offset = die->offset;
13440 slot = (struct dwarf2_offset_and_type **)
13441 htab_find_slot_with_hash (cu->type_hash, &ofs, ofs.offset, INSERT);
13443 complaint (&symfile_complaints,
13444 _("A problem internal to GDB: DIE 0x%x has type already set"),
13446 *slot = obstack_alloc (&cu->objfile->objfile_obstack, sizeof (**slot));
13451 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
13452 not have a saved type. */
13454 static struct type *
13455 get_die_type (struct die_info *die, struct dwarf2_cu *cu)
13457 struct dwarf2_offset_and_type *slot, ofs;
13458 htab_t type_hash = cu->type_hash;
13460 if (type_hash == NULL)
13463 ofs.offset = die->offset;
13464 slot = htab_find_with_hash (type_hash, &ofs, ofs.offset);
13471 /* Add a dependence relationship from CU to REF_PER_CU. */
13474 dwarf2_add_dependence (struct dwarf2_cu *cu,
13475 struct dwarf2_per_cu_data *ref_per_cu)
13479 if (cu->dependencies == NULL)
13481 = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
13482 NULL, &cu->comp_unit_obstack,
13483 hashtab_obstack_allocate,
13484 dummy_obstack_deallocate);
13486 slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
13488 *slot = ref_per_cu;
13491 /* Subroutine of dwarf2_mark to pass to htab_traverse.
13492 Set the mark field in every compilation unit in the
13493 cache that we must keep because we are keeping CU. */
13496 dwarf2_mark_helper (void **slot, void *data)
13498 struct dwarf2_per_cu_data *per_cu;
13500 per_cu = (struct dwarf2_per_cu_data *) *slot;
13501 if (per_cu->cu->mark)
13503 per_cu->cu->mark = 1;
13505 if (per_cu->cu->dependencies != NULL)
13506 htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
13511 /* Set the mark field in CU and in every other compilation unit in the
13512 cache that we must keep because we are keeping CU. */
13515 dwarf2_mark (struct dwarf2_cu *cu)
13520 if (cu->dependencies != NULL)
13521 htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
13525 dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
13529 per_cu->cu->mark = 0;
13530 per_cu = per_cu->cu->read_in_chain;
13534 /* Trivial hash function for partial_die_info: the hash value of a DIE
13535 is its offset in .debug_info for this objfile. */
13538 partial_die_hash (const void *item)
13540 const struct partial_die_info *part_die = item;
13542 return part_die->offset;
13545 /* Trivial comparison function for partial_die_info structures: two DIEs
13546 are equal if they have the same offset. */
13549 partial_die_eq (const void *item_lhs, const void *item_rhs)
13551 const struct partial_die_info *part_die_lhs = item_lhs;
13552 const struct partial_die_info *part_die_rhs = item_rhs;
13554 return part_die_lhs->offset == part_die_rhs->offset;
13557 static struct cmd_list_element *set_dwarf2_cmdlist;
13558 static struct cmd_list_element *show_dwarf2_cmdlist;
13561 set_dwarf2_cmd (char *args, int from_tty)
13563 help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
13567 show_dwarf2_cmd (char *args, int from_tty)
13569 cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
13572 /* If section described by INFO was mmapped, munmap it now. */
13575 munmap_section_buffer (struct dwarf2_section_info *info)
13577 if (info->was_mmapped)
13580 intptr_t begin = (intptr_t) info->buffer;
13581 intptr_t map_begin = begin & ~(pagesize - 1);
13582 size_t map_length = info->size + begin - map_begin;
13584 gdb_assert (munmap ((void *) map_begin, map_length) == 0);
13586 /* Without HAVE_MMAP, we should never be here to begin with. */
13592 /* munmap debug sections for OBJFILE, if necessary. */
13595 dwarf2_per_objfile_free (struct objfile *objfile, void *d)
13597 struct dwarf2_per_objfile *data = d;
13599 munmap_section_buffer (&data->info);
13600 munmap_section_buffer (&data->abbrev);
13601 munmap_section_buffer (&data->line);
13602 munmap_section_buffer (&data->str);
13603 munmap_section_buffer (&data->macinfo);
13604 munmap_section_buffer (&data->ranges);
13605 munmap_section_buffer (&data->loc);
13606 munmap_section_buffer (&data->frame);
13607 munmap_section_buffer (&data->eh_frame);
13608 munmap_section_buffer (&data->gdb_index);
13613 /* The contents of the hash table we create when building the string
13615 struct strtab_entry
13617 offset_type offset;
13621 /* Hash function for a strtab_entry. */
13623 hash_strtab_entry (const void *e)
13625 const struct strtab_entry *entry = e;
13626 return mapped_index_string_hash (entry->str);
13629 /* Equality function for a strtab_entry. */
13631 eq_strtab_entry (const void *a, const void *b)
13633 const struct strtab_entry *ea = a;
13634 const struct strtab_entry *eb = b;
13635 return !strcmp (ea->str, eb->str);
13638 /* Create a strtab_entry hash table. */
13640 create_strtab (void)
13642 return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry,
13643 xfree, xcalloc, xfree);
13646 /* Add a string to the constant pool. Return the string's offset in
13649 add_string (htab_t table, struct obstack *cpool, const char *str)
13652 struct strtab_entry entry;
13653 struct strtab_entry *result;
13656 slot = htab_find_slot (table, &entry, INSERT);
13661 result = XNEW (struct strtab_entry);
13662 result->offset = obstack_object_size (cpool);
13664 obstack_grow_str0 (cpool, str);
13667 return result->offset;
13670 /* An entry in the symbol table. */
13671 struct symtab_index_entry
13673 /* The name of the symbol. */
13675 /* The offset of the name in the constant pool. */
13676 offset_type index_offset;
13677 /* A sorted vector of the indices of all the CUs that hold an object
13679 VEC (offset_type) *cu_indices;
13682 /* The symbol table. This is a power-of-2-sized hash table. */
13683 struct mapped_symtab
13685 offset_type n_elements;
13687 struct symtab_index_entry **data;
13690 /* Hash function for a symtab_index_entry. */
13692 hash_symtab_entry (const void *e)
13694 const struct symtab_index_entry *entry = e;
13695 return iterative_hash (VEC_address (offset_type, entry->cu_indices),
13696 sizeof (offset_type) * VEC_length (offset_type,
13697 entry->cu_indices),
13701 /* Equality function for a symtab_index_entry. */
13703 eq_symtab_entry (const void *a, const void *b)
13705 const struct symtab_index_entry *ea = a;
13706 const struct symtab_index_entry *eb = b;
13707 int len = VEC_length (offset_type, ea->cu_indices);
13708 if (len != VEC_length (offset_type, eb->cu_indices))
13710 return !memcmp (VEC_address (offset_type, ea->cu_indices),
13711 VEC_address (offset_type, eb->cu_indices),
13712 sizeof (offset_type) * len);
13715 /* Destroy a symtab_index_entry. */
13717 delete_symtab_entry (void *p)
13719 struct symtab_index_entry *entry = p;
13720 VEC_free (offset_type, entry->cu_indices);
13724 /* Create a hash table holding symtab_index_entry objects. */
13726 create_index_table (void)
13728 return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry,
13729 delete_symtab_entry, xcalloc, xfree);
13732 /* Create a new mapped symtab object. */
13733 static struct mapped_symtab *
13734 create_mapped_symtab (void)
13736 struct mapped_symtab *symtab = XNEW (struct mapped_symtab);
13737 symtab->n_elements = 0;
13738 symtab->size = 1024;
13739 symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
13743 /* Destroy a mapped_symtab. */
13745 cleanup_mapped_symtab (void *p)
13747 struct mapped_symtab *symtab = p;
13748 /* The contents of the array are freed when the other hash table is
13750 xfree (symtab->data);
13754 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
13756 static struct symtab_index_entry **
13757 find_slot (struct mapped_symtab *symtab, const char *name)
13759 offset_type index, step, hash = mapped_index_string_hash (name);
13761 index = hash & (symtab->size - 1);
13762 step = ((hash * 17) & (symtab->size - 1)) | 1;
13766 if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name))
13767 return &symtab->data[index];
13768 index = (index + step) & (symtab->size - 1);
13772 /* Expand SYMTAB's hash table. */
13774 hash_expand (struct mapped_symtab *symtab)
13776 offset_type old_size = symtab->size;
13778 struct symtab_index_entry **old_entries = symtab->data;
13781 symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
13783 for (i = 0; i < old_size; ++i)
13785 if (old_entries[i])
13787 struct symtab_index_entry **slot = find_slot (symtab,
13788 old_entries[i]->name);
13789 *slot = old_entries[i];
13793 xfree (old_entries);
13796 /* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
13797 is the index of the CU in which the symbol appears. */
13799 add_index_entry (struct mapped_symtab *symtab, const char *name,
13800 offset_type cu_index)
13802 struct symtab_index_entry **slot;
13804 ++symtab->n_elements;
13805 if (4 * symtab->n_elements / 3 >= symtab->size)
13806 hash_expand (symtab);
13808 slot = find_slot (symtab, name);
13811 *slot = XNEW (struct symtab_index_entry);
13812 (*slot)->name = name;
13813 (*slot)->cu_indices = NULL;
13815 /* Don't push an index twice. Due to how we add entries we only
13816 have to check the last one. */
13817 if (VEC_empty (offset_type, (*slot)->cu_indices)
13818 || VEC_length (offset_type, (*slot)->cu_indices) != cu_index)
13819 VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index);
13822 /* Add a vector of indices to the constant pool. */
13824 add_indices_to_cpool (htab_t index_table, struct obstack *cpool,
13825 struct symtab_index_entry *entry)
13829 slot = htab_find_slot (index_table, entry, INSERT);
13832 offset_type len = VEC_length (offset_type, entry->cu_indices);
13833 offset_type val = MAYBE_SWAP (len);
13838 entry->index_offset = obstack_object_size (cpool);
13840 obstack_grow (cpool, &val, sizeof (val));
13842 VEC_iterate (offset_type, entry->cu_indices, i, iter);
13845 val = MAYBE_SWAP (iter);
13846 obstack_grow (cpool, &val, sizeof (val));
13851 struct symtab_index_entry *old_entry = *slot;
13852 entry->index_offset = old_entry->index_offset;
13855 return entry->index_offset;
13858 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
13859 constant pool entries going into the obstack CPOOL. */
13861 write_hash_table (struct mapped_symtab *symtab,
13862 struct obstack *output, struct obstack *cpool)
13865 htab_t index_table;
13868 index_table = create_index_table ();
13869 str_table = create_strtab ();
13870 /* We add all the index vectors to the constant pool first, to
13871 ensure alignment is ok. */
13872 for (i = 0; i < symtab->size; ++i)
13874 if (symtab->data[i])
13875 add_indices_to_cpool (index_table, cpool, symtab->data[i]);
13878 /* Now write out the hash table. */
13879 for (i = 0; i < symtab->size; ++i)
13881 offset_type str_off, vec_off;
13883 if (symtab->data[i])
13885 str_off = add_string (str_table, cpool, symtab->data[i]->name);
13886 vec_off = symtab->data[i]->index_offset;
13890 /* While 0 is a valid constant pool index, it is not valid
13891 to have 0 for both offsets. */
13896 str_off = MAYBE_SWAP (str_off);
13897 vec_off = MAYBE_SWAP (vec_off);
13899 obstack_grow (output, &str_off, sizeof (str_off));
13900 obstack_grow (output, &vec_off, sizeof (vec_off));
13903 htab_delete (str_table);
13904 htab_delete (index_table);
13907 /* Write an address entry to ADDR_OBSTACK. The addresses are taken
13908 from PST; CU_INDEX is the index of the CU in the vector of all
13911 add_address_entry (struct objfile *objfile,
13912 struct obstack *addr_obstack, struct partial_symtab *pst,
13913 unsigned int cu_index)
13915 offset_type offset;
13917 CORE_ADDR baseaddr;
13919 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
13921 store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, pst->textlow - baseaddr);
13922 obstack_grow (addr_obstack, addr, 8);
13923 store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, pst->texthigh - baseaddr);
13924 obstack_grow (addr_obstack, addr, 8);
13925 offset = MAYBE_SWAP (cu_index);
13926 obstack_grow (addr_obstack, &offset, sizeof (offset_type));
13929 /* Add a list of partial symbols to SYMTAB. */
13931 write_psymbols (struct mapped_symtab *symtab,
13932 struct partial_symbol **psymp,
13934 offset_type cu_index)
13936 for (; count-- > 0; ++psymp)
13938 if (SYMBOL_LANGUAGE (*psymp) == language_ada)
13939 error (_("Ada is not currently supported by the index"));
13940 add_index_entry (symtab, SYMBOL_NATURAL_NAME (*psymp), cu_index);
13944 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
13945 exception if there is an error. */
13947 write_obstack (FILE *file, struct obstack *obstack)
13949 if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack),
13951 != obstack_object_size (obstack))
13952 error (_("couldn't data write to file"));
13955 /* Unlink a file if the argument is not NULL. */
13957 unlink_if_set (void *p)
13959 char **filename = p;
13961 unlink (*filename);
13964 /* Create an index file for OBJFILE in the directory DIR. */
13966 write_psymtabs_to_index (struct objfile *objfile, const char *dir)
13968 struct cleanup *cleanup;
13969 char *filename, *cleanup_filename;
13970 struct obstack contents, addr_obstack, constant_pool, symtab_obstack, cu_list;
13973 struct mapped_symtab *symtab;
13974 offset_type val, size_of_contents, total_len;
13978 if (!objfile->psymtabs)
13980 if (dwarf2_per_objfile->using_index)
13981 error (_("Cannot use an index to create the index"));
13983 if (stat (objfile->name, &st) < 0)
13984 perror_with_name (_("Could not stat"));
13986 filename = concat (dir, SLASH_STRING, lbasename (objfile->name),
13987 INDEX_SUFFIX, (char *) NULL);
13988 cleanup = make_cleanup (xfree, filename);
13990 out_file = fopen (filename, "wb");
13992 error (_("Can't open `%s' for writing"), filename);
13994 cleanup_filename = filename;
13995 make_cleanup (unlink_if_set, &cleanup_filename);
13997 symtab = create_mapped_symtab ();
13998 make_cleanup (cleanup_mapped_symtab, symtab);
14000 obstack_init (&addr_obstack);
14001 make_cleanup_obstack_free (&addr_obstack);
14003 obstack_init (&cu_list);
14004 make_cleanup_obstack_free (&cu_list);
14006 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
14008 struct dwarf2_per_cu_data *cu = dwarf2_per_objfile->all_comp_units[i];
14009 struct partial_symtab *psymtab = cu->v.psymtab;
14012 write_psymbols (symtab,
14013 objfile->global_psymbols.list + psymtab->globals_offset,
14014 psymtab->n_global_syms, i);
14015 write_psymbols (symtab,
14016 objfile->static_psymbols.list + psymtab->statics_offset,
14017 psymtab->n_static_syms, i);
14019 add_address_entry (objfile, &addr_obstack, psymtab, i);
14021 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, cu->offset);
14022 obstack_grow (&cu_list, val, 8);
14023 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, cu->length);
14024 obstack_grow (&cu_list, val, 8);
14027 obstack_init (&constant_pool);
14028 make_cleanup_obstack_free (&constant_pool);
14029 obstack_init (&symtab_obstack);
14030 make_cleanup_obstack_free (&symtab_obstack);
14031 write_hash_table (symtab, &symtab_obstack, &constant_pool);
14033 obstack_init (&contents);
14034 make_cleanup_obstack_free (&contents);
14035 size_of_contents = 5 * sizeof (offset_type);
14036 total_len = size_of_contents;
14038 /* The version number. */
14039 val = MAYBE_SWAP (1);
14040 obstack_grow (&contents, &val, sizeof (val));
14042 /* The offset of the CU list from the start of the file. */
14043 val = MAYBE_SWAP (total_len);
14044 obstack_grow (&contents, &val, sizeof (val));
14045 total_len += obstack_object_size (&cu_list);
14047 /* The offset of the address table from the start of the file. */
14048 val = MAYBE_SWAP (total_len);
14049 obstack_grow (&contents, &val, sizeof (val));
14050 total_len += obstack_object_size (&addr_obstack);
14052 /* The offset of the symbol table from the start of the file. */
14053 val = MAYBE_SWAP (total_len);
14054 obstack_grow (&contents, &val, sizeof (val));
14055 total_len += obstack_object_size (&symtab_obstack);
14057 /* The offset of the constant pool from the start of the file. */
14058 val = MAYBE_SWAP (total_len);
14059 obstack_grow (&contents, &val, sizeof (val));
14060 total_len += obstack_object_size (&constant_pool);
14062 gdb_assert (obstack_object_size (&contents) == size_of_contents);
14064 write_obstack (out_file, &contents);
14065 write_obstack (out_file, &cu_list);
14066 write_obstack (out_file, &addr_obstack);
14067 write_obstack (out_file, &symtab_obstack);
14068 write_obstack (out_file, &constant_pool);
14072 /* We want to keep the file, so we set cleanup_filename to NULL
14073 here. See unlink_if_set. */
14074 cleanup_filename = NULL;
14076 do_cleanups (cleanup);
14079 /* The mapped index file format is designed to be directly mmap()able
14080 on any architecture. In most cases, a datum is represented using a
14081 little-endian 32-bit integer value, called an offset_type. Big
14082 endian machines must byte-swap the values before using them.
14083 Exceptions to this rule are noted. The data is laid out such that
14084 alignment is always respected.
14086 A mapped index consists of several sections.
14088 1. The file header. This is a sequence of values, of offset_type
14089 unless otherwise noted:
14090 [0] The version number. Currently 1.
14091 [1] The offset, from the start of the file, of the CU list.
14092 [2] The offset, from the start of the file, of the address section.
14093 [3] The offset, from the start of the file, of the symbol table.
14094 [4] The offset, from the start of the file, of the constant pool.
14096 2. The CU list. This is a sequence of pairs of 64-bit
14097 little-endian values. The first element in each pair is the offset
14098 of a CU in the .debug_info section. The second element in each
14099 pair is the length of that CU. References to a CU elsewhere in the
14100 map are done using a CU index, which is just the 0-based index into
14103 3. The address section. The address section consists of a sequence
14104 of address entries. Each address entry has three elements.
14105 [0] The low address. This is a 64-bit little-endian value.
14106 [1] The high address. This is a 64-bit little-endian value.
14107 [2] The CU index. This is an offset_type value.
14109 4. The symbol table. This is a hash table. The size of the hash
14110 table is always a power of 2. The initial hash and the step are
14111 currently defined by the `find_slot' function.
14113 Each slot in the hash table consists of a pair of offset_type
14114 values. The first value is the offset of the symbol's name in the
14115 constant pool. The second value is the offset of the CU vector in
14118 If both values are 0, then this slot in the hash table is empty.
14119 This is ok because while 0 is a valid constant pool index, it
14120 cannot be a valid index for both a string and a CU vector.
14122 A string in the constant pool is stored as a \0-terminated string,
14125 A CU vector in the constant pool is a sequence of offset_type
14126 values. The first value is the number of CU indices in the vector.
14127 Each subsequent value is the index of a CU in the CU list. This
14128 element in the hash table is used to indicate which CUs define the
14131 5. The constant pool. This is simply a bunch of bytes. It is
14132 organized so that alignment is correct: CU vectors are stored
14133 first, followed by strings. */
14135 save_gdb_index_command (char *arg, int from_tty)
14137 struct objfile *objfile;
14140 error (_("usage: maintenance save-gdb-index DIRECTORY"));
14142 ALL_OBJFILES (objfile)
14146 /* If the objfile does not correspond to an actual file, skip it. */
14147 if (stat (objfile->name, &st) < 0)
14150 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
14151 if (dwarf2_per_objfile)
14153 volatile struct gdb_exception except;
14155 TRY_CATCH (except, RETURN_MASK_ERROR)
14157 write_psymtabs_to_index (objfile, arg);
14159 if (except.reason < 0)
14160 exception_fprintf (gdb_stderr, except,
14161 _("Error while writing index for `%s': "),
14169 int dwarf2_always_disassemble;
14172 show_dwarf2_always_disassemble (struct ui_file *file, int from_tty,
14173 struct cmd_list_element *c, const char *value)
14175 fprintf_filtered (file, _("\
14176 Whether to always disassemble DWARF expressions is %s.\n"),
14180 void _initialize_dwarf2_read (void);
14183 _initialize_dwarf2_read (void)
14185 dwarf2_objfile_data_key
14186 = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free);
14188 add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
14189 Set DWARF 2 specific variables.\n\
14190 Configure DWARF 2 variables such as the cache size"),
14191 &set_dwarf2_cmdlist, "maintenance set dwarf2 ",
14192 0/*allow-unknown*/, &maintenance_set_cmdlist);
14194 add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\
14195 Show DWARF 2 specific variables\n\
14196 Show DWARF 2 variables such as the cache size"),
14197 &show_dwarf2_cmdlist, "maintenance show dwarf2 ",
14198 0/*allow-unknown*/, &maintenance_show_cmdlist);
14200 add_setshow_zinteger_cmd ("max-cache-age", class_obscure,
14201 &dwarf2_max_cache_age, _("\
14202 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
14203 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
14204 A higher limit means that cached compilation units will be stored\n\
14205 in memory longer, and more total memory will be used. Zero disables\n\
14206 caching, which can slow down startup."),
14208 show_dwarf2_max_cache_age,
14209 &set_dwarf2_cmdlist,
14210 &show_dwarf2_cmdlist);
14212 add_setshow_boolean_cmd ("always-disassemble", class_obscure,
14213 &dwarf2_always_disassemble, _("\
14214 Set whether `info address' always disassembles DWARF expressions."), _("\
14215 Show whether `info address' always disassembles DWARF expressions."), _("\
14216 When enabled, DWARF expressions are always printed in an assembly-like\n\
14217 syntax. When disabled, expressions will be printed in a more\n\
14218 conversational style, when possible."),
14220 show_dwarf2_always_disassemble,
14221 &set_dwarf2_cmdlist,
14222 &show_dwarf2_cmdlist);
14224 add_setshow_zinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\
14225 Set debugging of the dwarf2 DIE reader."), _("\
14226 Show debugging of the dwarf2 DIE reader."), _("\
14227 When enabled (non-zero), DIEs are dumped after they are read in.\n\
14228 The value is the maximum depth to print."),
14231 &setdebuglist, &showdebuglist);
14233 add_cmd ("gdb-index", class_files, save_gdb_index_command,
14234 _("Save a .gdb-index file"),