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"
56 #include "completer.h"
62 #include "gdb_string.h"
63 #include "gdb_assert.h"
64 #include <sys/types.h>
71 #define MAP_FAILED ((void *) -1)
75 typedef struct symbol *symbolp;
79 /* .debug_info header for a compilation unit
80 Because of alignment constraints, this structure has padding and cannot
81 be mapped directly onto the beginning of the .debug_info section. */
82 typedef struct comp_unit_header
84 unsigned int length; /* length of the .debug_info
86 unsigned short version; /* version number -- 2 for DWARF
88 unsigned int abbrev_offset; /* offset into .debug_abbrev section */
89 unsigned char addr_size; /* byte size of an address -- 4 */
92 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
95 /* .debug_line statement program prologue
96 Because of alignment constraints, this structure has padding and cannot
97 be mapped directly onto the beginning of the .debug_info section. */
98 typedef struct statement_prologue
100 unsigned int total_length; /* byte length of the statement
102 unsigned short version; /* version number -- 2 for DWARF
104 unsigned int prologue_length; /* # bytes between prologue &
106 unsigned char minimum_instruction_length; /* byte size of
108 unsigned char default_is_stmt; /* initial value of is_stmt
111 unsigned char line_range;
112 unsigned char opcode_base; /* number assigned to first special
114 unsigned char *standard_opcode_lengths;
118 /* When non-zero, dump DIEs after they are read in. */
119 static int dwarf2_die_debug = 0;
123 /* When set, the file that we're processing is known to have debugging
124 info for C++ namespaces. GCC 3.3.x did not produce this information,
125 but later versions do. */
127 static int processing_has_namespace_info;
129 static const struct objfile_data *dwarf2_objfile_data_key;
131 struct dwarf2_section_info
137 /* True if we have tried to read this section. */
141 /* All offsets in the index are of this type. It must be
142 architecture-independent. */
143 typedef uint32_t offset_type;
145 DEF_VEC_I (offset_type);
147 /* A description of the mapped index. The file format is described in
148 a comment by the code that writes the index. */
151 /* The total length of the buffer. */
153 /* A pointer to the address table data. */
154 const gdb_byte *address_table;
155 /* Size of the address table data in bytes. */
156 offset_type address_table_size;
157 /* The hash table. */
158 const offset_type *index_table;
159 /* Size in slots, each slot is 2 offset_types. */
160 offset_type index_table_slots;
161 /* A pointer to the constant pool. */
162 const char *constant_pool;
165 struct dwarf2_per_objfile
167 struct dwarf2_section_info info;
168 struct dwarf2_section_info abbrev;
169 struct dwarf2_section_info line;
170 struct dwarf2_section_info loc;
171 struct dwarf2_section_info macinfo;
172 struct dwarf2_section_info str;
173 struct dwarf2_section_info ranges;
174 struct dwarf2_section_info types;
175 struct dwarf2_section_info frame;
176 struct dwarf2_section_info eh_frame;
177 struct dwarf2_section_info gdb_index;
180 struct objfile *objfile;
182 /* A list of all the compilation units. This is used to locate
183 the target compilation unit of a particular reference. */
184 struct dwarf2_per_cu_data **all_comp_units;
186 /* The number of compilation units in ALL_COMP_UNITS. */
189 /* The number of .debug_types-related CUs. */
190 int n_type_comp_units;
192 /* The .debug_types-related CUs. */
193 struct dwarf2_per_cu_data **type_comp_units;
195 /* A chain of compilation units that are currently read in, so that
196 they can be freed later. */
197 struct dwarf2_per_cu_data *read_in_chain;
199 /* A table mapping .debug_types signatures to its signatured_type entry.
200 This is NULL if the .debug_types section hasn't been read in yet. */
201 htab_t signatured_types;
203 /* A flag indicating wether this objfile has a section loaded at a
205 int has_section_at_zero;
207 /* True if we are using the mapped index. */
208 unsigned char using_index;
210 /* The mapped index. */
211 struct mapped_index *index_table;
213 /* Set during partial symbol reading, to prevent queueing of full
215 int reading_partial_symbols;
217 /* Table mapping type .debug_info DIE offsets to types.
218 This is NULL if not allocated yet.
219 It (currently) makes sense to allocate debug_types_type_hash lazily.
220 To keep things simple we allocate both lazily. */
221 htab_t debug_info_type_hash;
223 /* Table mapping type .debug_types DIE offsets to types.
224 This is NULL if not allocated yet. */
225 htab_t debug_types_type_hash;
228 static struct dwarf2_per_objfile *dwarf2_per_objfile;
230 /* names of the debugging sections */
232 /* Note that if the debugging section has been compressed, it might
233 have a name like .zdebug_info. */
235 #define INFO_SECTION "debug_info"
236 #define ABBREV_SECTION "debug_abbrev"
237 #define LINE_SECTION "debug_line"
238 #define LOC_SECTION "debug_loc"
239 #define MACINFO_SECTION "debug_macinfo"
240 #define STR_SECTION "debug_str"
241 #define RANGES_SECTION "debug_ranges"
242 #define TYPES_SECTION "debug_types"
243 #define FRAME_SECTION "debug_frame"
244 #define EH_FRAME_SECTION "eh_frame"
245 #define GDB_INDEX_SECTION "gdb_index"
247 /* local data types */
249 /* We hold several abbreviation tables in memory at the same time. */
250 #ifndef ABBREV_HASH_SIZE
251 #define ABBREV_HASH_SIZE 121
254 /* The data in a compilation unit header, after target2host
255 translation, looks like this. */
256 struct comp_unit_head
260 unsigned char addr_size;
261 unsigned char signed_addr_p;
262 unsigned int abbrev_offset;
264 /* Size of file offsets; either 4 or 8. */
265 unsigned int offset_size;
267 /* Size of the length field; either 4 or 12. */
268 unsigned int initial_length_size;
270 /* Offset to the first byte of this compilation unit header in the
271 .debug_info section, for resolving relative reference dies. */
274 /* Offset to first die in this cu from the start of the cu.
275 This will be the first byte following the compilation unit header. */
276 unsigned int first_die_offset;
279 /* Type used for delaying computation of method physnames.
280 See comments for compute_delayed_physnames. */
281 struct delayed_method_info
283 /* The type to which the method is attached, i.e., its parent class. */
286 /* The index of the method in the type's function fieldlists. */
289 /* The index of the method in the fieldlist. */
292 /* The name of the DIE. */
295 /* The DIE associated with this method. */
296 struct die_info *die;
299 typedef struct delayed_method_info delayed_method_info;
300 DEF_VEC_O (delayed_method_info);
302 /* Internal state when decoding a particular compilation unit. */
305 /* The objfile containing this compilation unit. */
306 struct objfile *objfile;
308 /* The header of the compilation unit. */
309 struct comp_unit_head header;
311 /* Base address of this compilation unit. */
312 CORE_ADDR base_address;
314 /* Non-zero if base_address has been set. */
317 struct function_range *first_fn, *last_fn, *cached_fn;
319 /* The language we are debugging. */
320 enum language language;
321 const struct language_defn *language_defn;
323 const char *producer;
325 /* The generic symbol table building routines have separate lists for
326 file scope symbols and all all other scopes (local scopes). So
327 we need to select the right one to pass to add_symbol_to_list().
328 We do it by keeping a pointer to the correct list in list_in_scope.
330 FIXME: The original dwarf code just treated the file scope as the
331 first local scope, and all other local scopes as nested local
332 scopes, and worked fine. Check to see if we really need to
333 distinguish these in buildsym.c. */
334 struct pending **list_in_scope;
336 /* DWARF abbreviation table associated with this compilation unit. */
337 struct abbrev_info **dwarf2_abbrevs;
339 /* Storage for the abbrev table. */
340 struct obstack abbrev_obstack;
342 /* Hash table holding all the loaded partial DIEs. */
345 /* Storage for things with the same lifetime as this read-in compilation
346 unit, including partial DIEs. */
347 struct obstack comp_unit_obstack;
349 /* When multiple dwarf2_cu structures are living in memory, this field
350 chains them all together, so that they can be released efficiently.
351 We will probably also want a generation counter so that most-recently-used
352 compilation units are cached... */
353 struct dwarf2_per_cu_data *read_in_chain;
355 /* Backchain to our per_cu entry if the tree has been built. */
356 struct dwarf2_per_cu_data *per_cu;
358 /* How many compilation units ago was this CU last referenced? */
361 /* A hash table of die offsets for following references. */
364 /* Full DIEs if read in. */
365 struct die_info *dies;
367 /* A set of pointers to dwarf2_per_cu_data objects for compilation
368 units referenced by this one. Only set during full symbol processing;
369 partial symbol tables do not have dependencies. */
372 /* Header data from the line table, during full symbol processing. */
373 struct line_header *line_header;
375 /* A list of methods which need to have physnames computed
376 after all type information has been read. */
377 VEC (delayed_method_info) *method_list;
379 /* Mark used when releasing cached dies. */
380 unsigned int mark : 1;
382 /* This flag will be set if this compilation unit might include
383 inter-compilation-unit references. */
384 unsigned int has_form_ref_addr : 1;
386 /* This flag will be set if this compilation unit includes any
387 DW_TAG_namespace DIEs. If we know that there are explicit
388 DIEs for namespaces, we don't need to try to infer them
389 from mangled names. */
390 unsigned int has_namespace_info : 1;
393 /* When using the index (and thus not using psymtabs), each CU has an
394 object of this type. This is used to hold information needed by
395 the various "quick" methods. */
396 struct dwarf2_per_cu_quick_data
398 /* The line table. This can be NULL if there was no line table. */
399 struct line_header *lines;
401 /* The file names from the line table. */
402 const char **file_names;
403 /* The file names from the line table after being run through
405 const char **full_names;
407 /* The corresponding symbol table. This is NULL if symbols for this
408 CU have not yet been read. */
409 struct symtab *symtab;
411 /* A temporary mark bit used when iterating over all CUs in
412 expand_symtabs_matching. */
413 unsigned int mark : 1;
415 /* True if we've tried to read the line table. */
416 unsigned int read_lines : 1;
419 /* Persistent data held for a compilation unit, even when not
420 processing it. We put a pointer to this structure in the
421 read_symtab_private field of the psymtab. If we encounter
422 inter-compilation-unit references, we also maintain a sorted
423 list of all compilation units. */
425 struct dwarf2_per_cu_data
427 /* The start offset and length of this compilation unit. 2**29-1
428 bytes should suffice to store the length of any compilation unit
429 - if it doesn't, GDB will fall over anyway.
430 NOTE: Unlike comp_unit_head.length, this length includes
431 initial_length_size. */
433 unsigned int length : 29;
435 /* Flag indicating this compilation unit will be read in before
436 any of the current compilation units are processed. */
437 unsigned int queued : 1;
439 /* This flag will be set if we need to load absolutely all DIEs
440 for this compilation unit, instead of just the ones we think
441 are interesting. It gets set if we look for a DIE in the
442 hash table and don't find it. */
443 unsigned int load_all_dies : 1;
445 /* Non-zero if this CU is from .debug_types.
446 Otherwise it's from .debug_info. */
447 unsigned int from_debug_types : 1;
449 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
450 of the CU cache it gets reset to NULL again. */
451 struct dwarf2_cu *cu;
453 /* The corresponding objfile. */
454 struct objfile *objfile;
456 /* When using partial symbol tables, the 'psymtab' field is active.
457 Otherwise the 'quick' field is active. */
460 /* The partial symbol table associated with this compilation unit,
461 or NULL for partial units (which do not have an associated
463 struct partial_symtab *psymtab;
465 /* Data needed by the "quick" functions. */
466 struct dwarf2_per_cu_quick_data *quick;
470 /* Entry in the signatured_types hash table. */
472 struct signatured_type
476 /* Offset in .debug_types of the TU (type_unit) for this type. */
479 /* Offset in .debug_types of the type defined by this TU. */
480 unsigned int type_offset;
482 /* The CU(/TU) of this type. */
483 struct dwarf2_per_cu_data per_cu;
486 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
487 which are used for both .debug_info and .debug_types dies.
488 All parameters here are unchanging for the life of the call.
489 This struct exists to abstract away the constant parameters of
492 struct die_reader_specs
494 /* The bfd of this objfile. */
497 /* The CU of the DIE we are parsing. */
498 struct dwarf2_cu *cu;
500 /* Pointer to start of section buffer.
501 This is either the start of .debug_info or .debug_types. */
502 const gdb_byte *buffer;
505 /* The line number information for a compilation unit (found in the
506 .debug_line section) begins with a "statement program header",
507 which contains the following information. */
510 unsigned int total_length;
511 unsigned short version;
512 unsigned int header_length;
513 unsigned char minimum_instruction_length;
514 unsigned char maximum_ops_per_instruction;
515 unsigned char default_is_stmt;
517 unsigned char line_range;
518 unsigned char opcode_base;
520 /* standard_opcode_lengths[i] is the number of operands for the
521 standard opcode whose value is i. This means that
522 standard_opcode_lengths[0] is unused, and the last meaningful
523 element is standard_opcode_lengths[opcode_base - 1]. */
524 unsigned char *standard_opcode_lengths;
526 /* The include_directories table. NOTE! These strings are not
527 allocated with xmalloc; instead, they are pointers into
528 debug_line_buffer. If you try to free them, `free' will get
530 unsigned int num_include_dirs, include_dirs_size;
533 /* The file_names table. NOTE! These strings are not allocated
534 with xmalloc; instead, they are pointers into debug_line_buffer.
535 Don't try to free them directly. */
536 unsigned int num_file_names, file_names_size;
540 unsigned int dir_index;
541 unsigned int mod_time;
543 int included_p; /* Non-zero if referenced by the Line Number Program. */
544 struct symtab *symtab; /* The associated symbol table, if any. */
547 /* The start and end of the statement program following this
548 header. These point into dwarf2_per_objfile->line_buffer. */
549 gdb_byte *statement_program_start, *statement_program_end;
552 /* When we construct a partial symbol table entry we only
553 need this much information. */
554 struct partial_die_info
556 /* Offset of this DIE. */
559 /* DWARF-2 tag for this DIE. */
560 ENUM_BITFIELD(dwarf_tag) tag : 16;
562 /* Assorted flags describing the data found in this DIE. */
563 unsigned int has_children : 1;
564 unsigned int is_external : 1;
565 unsigned int is_declaration : 1;
566 unsigned int has_type : 1;
567 unsigned int has_specification : 1;
568 unsigned int has_pc_info : 1;
570 /* Flag set if the SCOPE field of this structure has been
572 unsigned int scope_set : 1;
574 /* Flag set if the DIE has a byte_size attribute. */
575 unsigned int has_byte_size : 1;
577 /* Flag set if any of the DIE's children are template arguments. */
578 unsigned int has_template_arguments : 1;
580 /* The name of this DIE. Normally the value of DW_AT_name, but
581 sometimes a default name for unnamed DIEs. */
584 /* The scope to prepend to our children. This is generally
585 allocated on the comp_unit_obstack, so will disappear
586 when this compilation unit leaves the cache. */
589 /* The location description associated with this DIE, if any. */
590 struct dwarf_block *locdesc;
592 /* If HAS_PC_INFO, the PC range associated with this DIE. */
596 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
597 DW_AT_sibling, if any. */
600 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
601 DW_AT_specification (or DW_AT_abstract_origin or
603 unsigned int spec_offset;
605 /* Pointers to this DIE's parent, first child, and next sibling,
607 struct partial_die_info *die_parent, *die_child, *die_sibling;
610 /* This data structure holds the information of an abbrev. */
613 unsigned int number; /* number identifying abbrev */
614 enum dwarf_tag tag; /* dwarf tag */
615 unsigned short has_children; /* boolean */
616 unsigned short num_attrs; /* number of attributes */
617 struct attr_abbrev *attrs; /* an array of attribute descriptions */
618 struct abbrev_info *next; /* next in chain */
623 ENUM_BITFIELD(dwarf_attribute) name : 16;
624 ENUM_BITFIELD(dwarf_form) form : 16;
627 /* Attributes have a name and a value */
630 ENUM_BITFIELD(dwarf_attribute) name : 16;
631 ENUM_BITFIELD(dwarf_form) form : 15;
633 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
634 field should be in u.str (existing only for DW_STRING) but it is kept
635 here for better struct attribute alignment. */
636 unsigned int string_is_canonical : 1;
641 struct dwarf_block *blk;
645 struct signatured_type *signatured_type;
650 /* This data structure holds a complete die structure. */
653 /* DWARF-2 tag for this DIE. */
654 ENUM_BITFIELD(dwarf_tag) tag : 16;
656 /* Number of attributes */
657 unsigned char num_attrs;
659 /* True if we're presently building the full type name for the
660 type derived from this DIE. */
661 unsigned char building_fullname : 1;
666 /* Offset in .debug_info or .debug_types section. */
669 /* The dies in a compilation unit form an n-ary tree. PARENT
670 points to this die's parent; CHILD points to the first child of
671 this node; and all the children of a given node are chained
672 together via their SIBLING fields, terminated by a die whose
674 struct die_info *child; /* Its first child, if any. */
675 struct die_info *sibling; /* Its next sibling, if any. */
676 struct die_info *parent; /* Its parent, if any. */
678 /* An array of attributes, with NUM_ATTRS elements. There may be
679 zero, but it's not common and zero-sized arrays are not
680 sufficiently portable C. */
681 struct attribute attrs[1];
684 struct function_range
687 CORE_ADDR lowpc, highpc;
689 struct function_range *next;
692 /* Get at parts of an attribute structure */
694 #define DW_STRING(attr) ((attr)->u.str)
695 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
696 #define DW_UNSND(attr) ((attr)->u.unsnd)
697 #define DW_BLOCK(attr) ((attr)->u.blk)
698 #define DW_SND(attr) ((attr)->u.snd)
699 #define DW_ADDR(attr) ((attr)->u.addr)
700 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
702 /* Blocks are a bunch of untyped bytes. */
709 #ifndef ATTR_ALLOC_CHUNK
710 #define ATTR_ALLOC_CHUNK 4
713 /* Allocate fields for structs, unions and enums in this size. */
714 #ifndef DW_FIELD_ALLOC_CHUNK
715 #define DW_FIELD_ALLOC_CHUNK 4
718 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
719 but this would require a corresponding change in unpack_field_as_long
721 static int bits_per_byte = 8;
723 /* The routines that read and process dies for a C struct or C++ class
724 pass lists of data member fields and lists of member function fields
725 in an instance of a field_info structure, as defined below. */
728 /* List of data member and baseclasses fields. */
731 struct nextfield *next;
736 *fields, *baseclasses;
738 /* Number of fields (including baseclasses). */
741 /* Number of baseclasses. */
744 /* Set if the accesibility of one of the fields is not public. */
745 int non_public_fields;
747 /* Member function fields array, entries are allocated in the order they
748 are encountered in the object file. */
751 struct nextfnfield *next;
752 struct fn_field fnfield;
756 /* Member function fieldlist array, contains name of possibly overloaded
757 member function, number of overloaded member functions and a pointer
758 to the head of the member function field chain. */
763 struct nextfnfield *head;
767 /* Number of entries in the fnfieldlists array. */
770 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
771 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
772 struct typedef_field_list
774 struct typedef_field field;
775 struct typedef_field_list *next;
778 unsigned typedef_field_list_count;
781 /* One item on the queue of compilation units to read in full symbols
783 struct dwarf2_queue_item
785 struct dwarf2_per_cu_data *per_cu;
786 struct dwarf2_queue_item *next;
789 /* The current queue. */
790 static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail;
792 /* Loaded secondary compilation units are kept in memory until they
793 have not been referenced for the processing of this many
794 compilation units. Set this to zero to disable caching. Cache
795 sizes of up to at least twenty will improve startup time for
796 typical inter-CU-reference binaries, at an obvious memory cost. */
797 static int dwarf2_max_cache_age = 5;
799 show_dwarf2_max_cache_age (struct ui_file *file, int from_tty,
800 struct cmd_list_element *c, const char *value)
802 fprintf_filtered (file, _("\
803 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
808 /* Various complaints about symbol reading that don't abort the process */
811 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
813 complaint (&symfile_complaints,
814 _("statement list doesn't fit in .debug_line section"));
818 dwarf2_debug_line_missing_file_complaint (void)
820 complaint (&symfile_complaints,
821 _(".debug_line section has line data without a file"));
825 dwarf2_debug_line_missing_end_sequence_complaint (void)
827 complaint (&symfile_complaints,
828 _(".debug_line section has line program sequence without an end"));
832 dwarf2_complex_location_expr_complaint (void)
834 complaint (&symfile_complaints, _("location expression too complex"));
838 dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
841 complaint (&symfile_complaints,
842 _("const value length mismatch for '%s', got %d, expected %d"), arg1,
847 dwarf2_macros_too_long_complaint (void)
849 complaint (&symfile_complaints,
850 _("macro info runs off end of `.debug_macinfo' section"));
854 dwarf2_macro_malformed_definition_complaint (const char *arg1)
856 complaint (&symfile_complaints,
857 _("macro debug info contains a malformed macro definition:\n`%s'"),
862 dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
864 complaint (&symfile_complaints,
865 _("invalid attribute class or form for '%s' in '%s'"), arg1, arg2);
868 /* local function prototypes */
870 static void dwarf2_locate_sections (bfd *, asection *, void *);
872 static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
875 static void dwarf2_build_psymtabs_hard (struct objfile *);
877 static void scan_partial_symbols (struct partial_die_info *,
878 CORE_ADDR *, CORE_ADDR *,
879 int, struct dwarf2_cu *);
881 static void add_partial_symbol (struct partial_die_info *,
884 static void add_partial_namespace (struct partial_die_info *pdi,
885 CORE_ADDR *lowpc, CORE_ADDR *highpc,
886 int need_pc, struct dwarf2_cu *cu);
888 static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
889 CORE_ADDR *highpc, int need_pc,
890 struct dwarf2_cu *cu);
892 static void add_partial_enumeration (struct partial_die_info *enum_pdi,
893 struct dwarf2_cu *cu);
895 static void add_partial_subprogram (struct partial_die_info *pdi,
896 CORE_ADDR *lowpc, CORE_ADDR *highpc,
897 int need_pc, struct dwarf2_cu *cu);
899 static gdb_byte *locate_pdi_sibling (struct partial_die_info *orig_pdi,
900 gdb_byte *buffer, gdb_byte *info_ptr,
901 bfd *abfd, struct dwarf2_cu *cu);
903 static void dwarf2_psymtab_to_symtab (struct partial_symtab *);
905 static void psymtab_to_symtab_1 (struct partial_symtab *);
907 static void dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu);
909 static void dwarf2_free_abbrev_table (void *);
911 static struct abbrev_info *peek_die_abbrev (gdb_byte *, unsigned int *,
914 static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int,
917 static struct partial_die_info *load_partial_dies (bfd *,
918 gdb_byte *, gdb_byte *,
919 int, struct dwarf2_cu *);
921 static gdb_byte *read_partial_die (struct partial_die_info *,
922 struct abbrev_info *abbrev,
924 gdb_byte *, gdb_byte *,
927 static struct partial_die_info *find_partial_die (unsigned int,
930 static void fixup_partial_die (struct partial_die_info *,
933 static gdb_byte *read_attribute (struct attribute *, struct attr_abbrev *,
934 bfd *, gdb_byte *, struct dwarf2_cu *);
936 static gdb_byte *read_attribute_value (struct attribute *, unsigned,
937 bfd *, gdb_byte *, struct dwarf2_cu *);
939 static unsigned int read_1_byte (bfd *, gdb_byte *);
941 static int read_1_signed_byte (bfd *, gdb_byte *);
943 static unsigned int read_2_bytes (bfd *, gdb_byte *);
945 static unsigned int read_4_bytes (bfd *, gdb_byte *);
947 static ULONGEST read_8_bytes (bfd *, gdb_byte *);
949 static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *,
952 static LONGEST read_initial_length (bfd *, gdb_byte *, unsigned int *);
954 static LONGEST read_checked_initial_length_and_offset
955 (bfd *, gdb_byte *, const struct comp_unit_head *,
956 unsigned int *, unsigned int *);
958 static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *,
961 static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int);
963 static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int);
965 static char *read_direct_string (bfd *, gdb_byte *, unsigned int *);
967 static char *read_indirect_string (bfd *, gdb_byte *,
968 const struct comp_unit_head *,
971 static unsigned long read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *);
973 static long read_signed_leb128 (bfd *, gdb_byte *, unsigned int *);
975 static gdb_byte *skip_leb128 (bfd *, gdb_byte *);
977 static void set_cu_language (unsigned int, struct dwarf2_cu *);
979 static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
982 static struct attribute *dwarf2_attr_no_follow (struct die_info *,
986 static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
987 struct dwarf2_cu *cu);
989 static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
991 static struct die_info *die_specification (struct die_info *die,
992 struct dwarf2_cu **);
994 static void free_line_header (struct line_header *lh);
996 static void add_file_name (struct line_header *, char *, unsigned int,
997 unsigned int, unsigned int);
999 static struct line_header *(dwarf_decode_line_header
1000 (unsigned int offset,
1001 bfd *abfd, struct dwarf2_cu *cu));
1003 static void dwarf_decode_lines (struct line_header *, char *, bfd *,
1004 struct dwarf2_cu *, struct partial_symtab *);
1006 static void dwarf2_start_subfile (char *, char *, char *);
1008 static struct symbol *new_symbol (struct die_info *, struct type *,
1009 struct dwarf2_cu *);
1011 static struct symbol *new_symbol_full (struct die_info *, struct type *,
1012 struct dwarf2_cu *, struct symbol *);
1014 static void dwarf2_const_value (struct attribute *, struct symbol *,
1015 struct dwarf2_cu *);
1017 static void dwarf2_const_value_attr (struct attribute *attr,
1020 struct obstack *obstack,
1021 struct dwarf2_cu *cu, long *value,
1023 struct dwarf2_locexpr_baton **baton);
1025 static struct type *die_type (struct die_info *, struct dwarf2_cu *);
1027 static int need_gnat_info (struct dwarf2_cu *);
1029 static struct type *die_descriptive_type (struct die_info *, struct dwarf2_cu *);
1031 static void set_descriptive_type (struct type *, struct die_info *,
1032 struct dwarf2_cu *);
1034 static struct type *die_containing_type (struct die_info *,
1035 struct dwarf2_cu *);
1037 static struct type *lookup_die_type (struct die_info *, struct attribute *,
1038 struct dwarf2_cu *);
1040 static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
1042 static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *);
1044 static char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
1046 static char *typename_concat (struct obstack *obs, const char *prefix,
1047 const char *suffix, int physname,
1048 struct dwarf2_cu *cu);
1050 static void read_file_scope (struct die_info *, struct dwarf2_cu *);
1052 static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *);
1054 static void read_func_scope (struct die_info *, struct dwarf2_cu *);
1056 static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
1058 static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *,
1059 struct dwarf2_cu *, struct partial_symtab *);
1061 static int dwarf2_get_pc_bounds (struct die_info *,
1062 CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *,
1063 struct partial_symtab *);
1065 static void get_scope_pc_bounds (struct die_info *,
1066 CORE_ADDR *, CORE_ADDR *,
1067 struct dwarf2_cu *);
1069 static void dwarf2_record_block_ranges (struct die_info *, struct block *,
1070 CORE_ADDR, struct dwarf2_cu *);
1072 static void dwarf2_add_field (struct field_info *, struct die_info *,
1073 struct dwarf2_cu *);
1075 static void dwarf2_attach_fields_to_type (struct field_info *,
1076 struct type *, struct dwarf2_cu *);
1078 static void dwarf2_add_member_fn (struct field_info *,
1079 struct die_info *, struct type *,
1080 struct dwarf2_cu *);
1082 static void dwarf2_attach_fn_fields_to_type (struct field_info *,
1083 struct type *, struct dwarf2_cu *);
1085 static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
1087 static void read_common_block (struct die_info *, struct dwarf2_cu *);
1089 static void read_namespace (struct die_info *die, struct dwarf2_cu *);
1091 static void read_module (struct die_info *die, struct dwarf2_cu *cu);
1093 static void read_import_statement (struct die_info *die, struct dwarf2_cu *);
1095 static struct type *read_module_type (struct die_info *die,
1096 struct dwarf2_cu *cu);
1098 static const char *namespace_name (struct die_info *die,
1099 int *is_anonymous, struct dwarf2_cu *);
1101 static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
1103 static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
1105 static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
1106 struct dwarf2_cu *);
1108 static struct die_info *read_comp_unit (gdb_byte *, struct dwarf2_cu *);
1110 static struct die_info *read_die_and_children_1 (const struct die_reader_specs *reader,
1112 gdb_byte **new_info_ptr,
1113 struct die_info *parent);
1115 static struct die_info *read_die_and_children (const struct die_reader_specs *reader,
1117 gdb_byte **new_info_ptr,
1118 struct die_info *parent);
1120 static struct die_info *read_die_and_siblings (const struct die_reader_specs *reader,
1122 gdb_byte **new_info_ptr,
1123 struct die_info *parent);
1125 static gdb_byte *read_full_die (const struct die_reader_specs *reader,
1126 struct die_info **, gdb_byte *,
1129 static void process_die (struct die_info *, struct dwarf2_cu *);
1131 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu *,
1134 static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
1136 static const char *dwarf2_full_name (char *name,
1137 struct die_info *die,
1138 struct dwarf2_cu *cu);
1140 static struct die_info *dwarf2_extension (struct die_info *die,
1141 struct dwarf2_cu **);
1143 static char *dwarf_tag_name (unsigned int);
1145 static char *dwarf_attr_name (unsigned int);
1147 static char *dwarf_form_name (unsigned int);
1149 static char *dwarf_bool_name (unsigned int);
1151 static char *dwarf_type_encoding_name (unsigned int);
1154 static char *dwarf_cfi_name (unsigned int);
1157 static struct die_info *sibling_die (struct die_info *);
1159 static void dump_die_shallow (struct ui_file *, int indent, struct die_info *);
1161 static void dump_die_for_error (struct die_info *);
1163 static void dump_die_1 (struct ui_file *, int level, int max_level,
1166 /*static*/ void dump_die (struct die_info *, int max_level);
1168 static void store_in_ref_table (struct die_info *,
1169 struct dwarf2_cu *);
1171 static int is_ref_attr (struct attribute *);
1173 static unsigned int dwarf2_get_ref_die_offset (struct attribute *);
1175 static LONGEST dwarf2_get_attr_constant_value (struct attribute *, int);
1177 static struct die_info *follow_die_ref_or_sig (struct die_info *,
1179 struct dwarf2_cu **);
1181 static struct die_info *follow_die_ref (struct die_info *,
1183 struct dwarf2_cu **);
1185 static struct die_info *follow_die_sig (struct die_info *,
1187 struct dwarf2_cu **);
1189 static void read_signatured_type_at_offset (struct objfile *objfile,
1190 unsigned int offset);
1192 static void read_signatured_type (struct objfile *,
1193 struct signatured_type *type_sig);
1195 /* memory allocation interface */
1197 static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
1199 static struct abbrev_info *dwarf_alloc_abbrev (struct dwarf2_cu *);
1201 static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int);
1203 static void initialize_cu_func_list (struct dwarf2_cu *);
1205 static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR,
1206 struct dwarf2_cu *);
1208 static void dwarf_decode_macros (struct line_header *, unsigned int,
1209 char *, bfd *, struct dwarf2_cu *);
1211 static int attr_form_is_block (struct attribute *);
1213 static int attr_form_is_section_offset (struct attribute *);
1215 static int attr_form_is_constant (struct attribute *);
1217 static void dwarf2_symbol_mark_computed (struct attribute *attr,
1219 struct dwarf2_cu *cu);
1221 static gdb_byte *skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
1222 struct abbrev_info *abbrev,
1223 struct dwarf2_cu *cu);
1225 static void free_stack_comp_unit (void *);
1227 static hashval_t partial_die_hash (const void *item);
1229 static int partial_die_eq (const void *item_lhs, const void *item_rhs);
1231 static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
1232 (unsigned int offset, struct objfile *objfile);
1234 static struct dwarf2_per_cu_data *dwarf2_find_comp_unit
1235 (unsigned int offset, struct objfile *objfile);
1237 static struct dwarf2_cu *alloc_one_comp_unit (struct objfile *objfile);
1239 static void free_one_comp_unit (void *);
1241 static void free_cached_comp_units (void *);
1243 static void age_cached_comp_units (void);
1245 static void free_one_cached_comp_unit (void *);
1247 static struct type *set_die_type (struct die_info *, struct type *,
1248 struct dwarf2_cu *);
1250 static void create_all_comp_units (struct objfile *);
1252 static int create_debug_types_hash_table (struct objfile *objfile);
1254 static void load_full_comp_unit (struct dwarf2_per_cu_data *,
1257 static void process_full_comp_unit (struct dwarf2_per_cu_data *);
1259 static void dwarf2_add_dependence (struct dwarf2_cu *,
1260 struct dwarf2_per_cu_data *);
1262 static void dwarf2_mark (struct dwarf2_cu *);
1264 static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
1266 static struct type *get_die_type_at_offset (unsigned int,
1267 struct dwarf2_per_cu_data *per_cu);
1269 static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu);
1271 static void dwarf2_release_queue (void *dummy);
1273 static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu,
1274 struct objfile *objfile);
1276 static void process_queue (struct objfile *objfile);
1278 static void find_file_and_directory (struct die_info *die,
1279 struct dwarf2_cu *cu,
1280 char **name, char **comp_dir);
1282 static char *file_full_name (int file, struct line_header *lh,
1283 const char *comp_dir);
1285 static gdb_byte *partial_read_comp_unit_head (struct comp_unit_head *header,
1288 unsigned int buffer_size,
1291 static void init_cu_die_reader (struct die_reader_specs *reader,
1292 struct dwarf2_cu *cu);
1294 static htab_t allocate_signatured_type_table (struct objfile *objfile);
1298 /* Convert VALUE between big- and little-endian. */
1300 byte_swap (offset_type value)
1304 result = (value & 0xff) << 24;
1305 result |= (value & 0xff00) << 8;
1306 result |= (value & 0xff0000) >> 8;
1307 result |= (value & 0xff000000) >> 24;
1311 #define MAYBE_SWAP(V) byte_swap (V)
1314 #define MAYBE_SWAP(V) (V)
1315 #endif /* WORDS_BIGENDIAN */
1317 /* The suffix for an index file. */
1318 #define INDEX_SUFFIX ".gdb-index"
1320 static const char *dwarf2_physname (char *name, struct die_info *die,
1321 struct dwarf2_cu *cu);
1323 /* Try to locate the sections we need for DWARF 2 debugging
1324 information and return true if we have enough to do something. */
1327 dwarf2_has_info (struct objfile *objfile)
1329 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
1330 if (!dwarf2_per_objfile)
1332 /* Initialize per-objfile state. */
1333 struct dwarf2_per_objfile *data
1334 = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
1336 memset (data, 0, sizeof (*data));
1337 set_objfile_data (objfile, dwarf2_objfile_data_key, data);
1338 dwarf2_per_objfile = data;
1340 bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL);
1341 dwarf2_per_objfile->objfile = objfile;
1343 return (dwarf2_per_objfile->info.asection != NULL
1344 && dwarf2_per_objfile->abbrev.asection != NULL);
1347 /* When loading sections, we can either look for ".<name>", or for
1348 * ".z<name>", which indicates a compressed section. */
1351 section_is_p (const char *section_name, const char *name)
1353 return (section_name[0] == '.'
1354 && (strcmp (section_name + 1, name) == 0
1355 || (section_name[1] == 'z'
1356 && strcmp (section_name + 2, name) == 0)));
1359 /* This function is mapped across the sections and remembers the
1360 offset and size of each of the debugging sections we are interested
1364 dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr)
1366 if (section_is_p (sectp->name, INFO_SECTION))
1368 dwarf2_per_objfile->info.asection = sectp;
1369 dwarf2_per_objfile->info.size = bfd_get_section_size (sectp);
1371 else if (section_is_p (sectp->name, ABBREV_SECTION))
1373 dwarf2_per_objfile->abbrev.asection = sectp;
1374 dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp);
1376 else if (section_is_p (sectp->name, LINE_SECTION))
1378 dwarf2_per_objfile->line.asection = sectp;
1379 dwarf2_per_objfile->line.size = bfd_get_section_size (sectp);
1381 else if (section_is_p (sectp->name, LOC_SECTION))
1383 dwarf2_per_objfile->loc.asection = sectp;
1384 dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp);
1386 else if (section_is_p (sectp->name, MACINFO_SECTION))
1388 dwarf2_per_objfile->macinfo.asection = sectp;
1389 dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp);
1391 else if (section_is_p (sectp->name, STR_SECTION))
1393 dwarf2_per_objfile->str.asection = sectp;
1394 dwarf2_per_objfile->str.size = bfd_get_section_size (sectp);
1396 else if (section_is_p (sectp->name, FRAME_SECTION))
1398 dwarf2_per_objfile->frame.asection = sectp;
1399 dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp);
1401 else if (section_is_p (sectp->name, EH_FRAME_SECTION))
1403 flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
1405 if (aflag & SEC_HAS_CONTENTS)
1407 dwarf2_per_objfile->eh_frame.asection = sectp;
1408 dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp);
1411 else if (section_is_p (sectp->name, RANGES_SECTION))
1413 dwarf2_per_objfile->ranges.asection = sectp;
1414 dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp);
1416 else if (section_is_p (sectp->name, TYPES_SECTION))
1418 dwarf2_per_objfile->types.asection = sectp;
1419 dwarf2_per_objfile->types.size = bfd_get_section_size (sectp);
1421 else if (section_is_p (sectp->name, GDB_INDEX_SECTION))
1423 dwarf2_per_objfile->gdb_index.asection = sectp;
1424 dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp);
1427 if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
1428 && bfd_section_vma (abfd, sectp) == 0)
1429 dwarf2_per_objfile->has_section_at_zero = 1;
1432 /* Decompress a section that was compressed using zlib. Store the
1433 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1436 zlib_decompress_section (struct objfile *objfile, asection *sectp,
1437 gdb_byte **outbuf, bfd_size_type *outsize)
1439 bfd *abfd = objfile->obfd;
1441 error (_("Support for zlib-compressed DWARF data (from '%s') "
1442 "is disabled in this copy of GDB"),
1443 bfd_get_filename (abfd));
1445 bfd_size_type compressed_size = bfd_get_section_size (sectp);
1446 gdb_byte *compressed_buffer = xmalloc (compressed_size);
1447 struct cleanup *cleanup = make_cleanup (xfree, compressed_buffer);
1448 bfd_size_type uncompressed_size;
1449 gdb_byte *uncompressed_buffer;
1452 int header_size = 12;
1454 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1455 || bfd_bread (compressed_buffer, compressed_size, abfd) != compressed_size)
1456 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1457 bfd_get_filename (abfd));
1459 /* Read the zlib header. In this case, it should be "ZLIB" followed
1460 by the uncompressed section size, 8 bytes in big-endian order. */
1461 if (compressed_size < header_size
1462 || strncmp (compressed_buffer, "ZLIB", 4) != 0)
1463 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1464 bfd_get_filename (abfd));
1465 uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8;
1466 uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8;
1467 uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8;
1468 uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8;
1469 uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8;
1470 uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8;
1471 uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8;
1472 uncompressed_size += compressed_buffer[11];
1474 /* It is possible the section consists of several compressed
1475 buffers concatenated together, so we uncompress in a loop. */
1479 strm.avail_in = compressed_size - header_size;
1480 strm.next_in = (Bytef*) compressed_buffer + header_size;
1481 strm.avail_out = uncompressed_size;
1482 uncompressed_buffer = obstack_alloc (&objfile->objfile_obstack,
1484 rc = inflateInit (&strm);
1485 while (strm.avail_in > 0)
1488 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1489 bfd_get_filename (abfd), rc);
1490 strm.next_out = ((Bytef*) uncompressed_buffer
1491 + (uncompressed_size - strm.avail_out));
1492 rc = inflate (&strm, Z_FINISH);
1493 if (rc != Z_STREAM_END)
1494 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1495 bfd_get_filename (abfd), rc);
1496 rc = inflateReset (&strm);
1498 rc = inflateEnd (&strm);
1500 || strm.avail_out != 0)
1501 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1502 bfd_get_filename (abfd), rc);
1504 do_cleanups (cleanup);
1505 *outbuf = uncompressed_buffer;
1506 *outsize = uncompressed_size;
1510 /* Read the contents of the section SECTP from object file specified by
1511 OBJFILE, store info about the section into INFO.
1512 If the section is compressed, uncompress it before returning. */
1515 dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info)
1517 bfd *abfd = objfile->obfd;
1518 asection *sectp = info->asection;
1519 gdb_byte *buf, *retbuf;
1520 unsigned char header[4];
1524 info->buffer = NULL;
1525 info->was_mmapped = 0;
1528 if (info->asection == NULL || info->size == 0)
1531 /* Check if the file has a 4-byte header indicating compression. */
1532 if (info->size > sizeof (header)
1533 && bfd_seek (abfd, sectp->filepos, SEEK_SET) == 0
1534 && bfd_bread (header, sizeof (header), abfd) == sizeof (header))
1536 /* Upon decompression, update the buffer and its size. */
1537 if (strncmp (header, "ZLIB", sizeof (header)) == 0)
1539 zlib_decompress_section (objfile, sectp, &info->buffer,
1547 pagesize = getpagesize ();
1549 /* Only try to mmap sections which are large enough: we don't want to
1550 waste space due to fragmentation. Also, only try mmap for sections
1551 without relocations. */
1553 if (info->size > 4 * pagesize && (sectp->flags & SEC_RELOC) == 0)
1555 off_t pg_offset = sectp->filepos & ~(pagesize - 1);
1556 size_t map_length = info->size + sectp->filepos - pg_offset;
1557 caddr_t retbuf = bfd_mmap (abfd, 0, map_length, PROT_READ,
1558 MAP_PRIVATE, pg_offset);
1560 if (retbuf != MAP_FAILED)
1562 info->was_mmapped = 1;
1563 info->buffer = retbuf + (sectp->filepos & (pagesize - 1)) ;
1564 #if HAVE_POSIX_MADVISE
1565 posix_madvise (retbuf, map_length, POSIX_MADV_WILLNEED);
1572 /* If we get here, we are a normal, not-compressed section. */
1574 = obstack_alloc (&objfile->objfile_obstack, info->size);
1576 /* When debugging .o files, we may need to apply relocations; see
1577 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1578 We never compress sections in .o files, so we only need to
1579 try this when the section is not compressed. */
1580 retbuf = symfile_relocate_debug_section (objfile, sectp, buf);
1583 info->buffer = retbuf;
1587 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1588 || bfd_bread (buf, info->size, abfd) != info->size)
1589 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1590 bfd_get_filename (abfd));
1593 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1597 dwarf2_get_section_info (struct objfile *objfile, const char *section_name,
1598 asection **sectp, gdb_byte **bufp,
1599 bfd_size_type *sizep)
1601 struct dwarf2_per_objfile *data
1602 = objfile_data (objfile, dwarf2_objfile_data_key);
1603 struct dwarf2_section_info *info;
1605 /* We may see an objfile without any DWARF, in which case we just
1614 if (section_is_p (section_name, EH_FRAME_SECTION))
1615 info = &data->eh_frame;
1616 else if (section_is_p (section_name, FRAME_SECTION))
1617 info = &data->frame;
1619 gdb_assert_not_reached ("unexpected section");
1621 if (info->asection != NULL && info->size != 0 && info->buffer == NULL)
1622 /* We haven't read this section in yet. Do it now. */
1623 dwarf2_read_section (objfile, info);
1625 *sectp = info->asection;
1626 *bufp = info->buffer;
1627 *sizep = info->size;
1632 /* Read in the symbols for PER_CU. OBJFILE is the objfile from which
1635 dw2_do_instantiate_symtab (struct objfile *objfile,
1636 struct dwarf2_per_cu_data *per_cu)
1638 struct cleanup *back_to;
1640 back_to = make_cleanup (dwarf2_release_queue, NULL);
1642 queue_comp_unit (per_cu, objfile);
1644 if (per_cu->from_debug_types)
1645 read_signatured_type_at_offset (objfile, per_cu->offset);
1647 load_full_comp_unit (per_cu, objfile);
1649 process_queue (objfile);
1651 /* Age the cache, releasing compilation units that have not
1652 been used recently. */
1653 age_cached_comp_units ();
1655 do_cleanups (back_to);
1658 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
1659 the objfile from which this CU came. Returns the resulting symbol
1661 static struct symtab *
1662 dw2_instantiate_symtab (struct objfile *objfile,
1663 struct dwarf2_per_cu_data *per_cu)
1665 if (!per_cu->v.quick->symtab)
1667 struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL);
1668 increment_reading_symtab ();
1669 dw2_do_instantiate_symtab (objfile, per_cu);
1670 do_cleanups (back_to);
1672 return per_cu->v.quick->symtab;
1675 /* Return the CU given its index. */
1676 static struct dwarf2_per_cu_data *
1677 dw2_get_cu (int index)
1679 if (index >= dwarf2_per_objfile->n_comp_units)
1681 index -= dwarf2_per_objfile->n_comp_units;
1682 return dwarf2_per_objfile->type_comp_units[index];
1684 return dwarf2_per_objfile->all_comp_units[index];
1687 /* A helper function that knows how to read a 64-bit value in a way
1688 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
1691 extract_cu_value (const char *bytes, ULONGEST *result)
1693 if (sizeof (ULONGEST) < 8)
1697 /* Ignore the upper 4 bytes if they are all zero. */
1698 for (i = 0; i < 4; ++i)
1699 if (bytes[i + 4] != 0)
1702 *result = extract_unsigned_integer (bytes, 4, BFD_ENDIAN_LITTLE);
1705 *result = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE);
1709 /* Read the CU list from the mapped index, and use it to create all
1710 the CU objects for this objfile. Return 0 if something went wrong,
1711 1 if everything went ok. */
1713 create_cus_from_index (struct objfile *objfile, const gdb_byte *cu_list,
1714 offset_type cu_list_elements)
1718 dwarf2_per_objfile->n_comp_units = cu_list_elements / 2;
1719 dwarf2_per_objfile->all_comp_units
1720 = obstack_alloc (&objfile->objfile_obstack,
1721 dwarf2_per_objfile->n_comp_units
1722 * sizeof (struct dwarf2_per_cu_data *));
1724 for (i = 0; i < cu_list_elements; i += 2)
1726 struct dwarf2_per_cu_data *the_cu;
1727 ULONGEST offset, length;
1729 if (!extract_cu_value (cu_list, &offset)
1730 || !extract_cu_value (cu_list + 8, &length))
1734 the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack,
1735 struct dwarf2_per_cu_data);
1736 the_cu->offset = offset;
1737 the_cu->length = length;
1738 the_cu->objfile = objfile;
1739 the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
1740 struct dwarf2_per_cu_quick_data);
1741 dwarf2_per_objfile->all_comp_units[i / 2] = the_cu;
1747 /* Create the signatured type hash table from the index. */
1750 create_signatured_type_table_from_index (struct objfile *objfile,
1751 const gdb_byte *bytes,
1752 offset_type elements)
1755 htab_t sig_types_hash;
1757 dwarf2_per_objfile->n_type_comp_units = elements / 3;
1758 dwarf2_per_objfile->type_comp_units
1759 = obstack_alloc (&objfile->objfile_obstack,
1760 dwarf2_per_objfile->n_type_comp_units
1761 * sizeof (struct dwarf2_per_cu_data *));
1763 sig_types_hash = allocate_signatured_type_table (objfile);
1765 for (i = 0; i < elements; i += 3)
1767 struct signatured_type *type_sig;
1768 ULONGEST offset, type_offset, signature;
1771 if (!extract_cu_value (bytes, &offset)
1772 || !extract_cu_value (bytes + 8, &type_offset))
1774 signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE);
1777 type_sig = OBSTACK_ZALLOC (&objfile->objfile_obstack,
1778 struct signatured_type);
1779 type_sig->signature = signature;
1780 type_sig->offset = offset;
1781 type_sig->type_offset = type_offset;
1782 type_sig->per_cu.from_debug_types = 1;
1783 type_sig->per_cu.offset = offset;
1784 type_sig->per_cu.objfile = objfile;
1785 type_sig->per_cu.v.quick
1786 = OBSTACK_ZALLOC (&objfile->objfile_obstack,
1787 struct dwarf2_per_cu_quick_data);
1789 slot = htab_find_slot (sig_types_hash, type_sig, INSERT);
1792 dwarf2_per_objfile->type_comp_units[i / 3] = &type_sig->per_cu;
1795 dwarf2_per_objfile->signatured_types = sig_types_hash;
1800 /* Read the address map data from the mapped index, and use it to
1801 populate the objfile's psymtabs_addrmap. */
1803 create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index)
1805 const gdb_byte *iter, *end;
1806 struct obstack temp_obstack;
1807 struct addrmap *mutable_map;
1808 struct cleanup *cleanup;
1811 obstack_init (&temp_obstack);
1812 cleanup = make_cleanup_obstack_free (&temp_obstack);
1813 mutable_map = addrmap_create_mutable (&temp_obstack);
1815 iter = index->address_table;
1816 end = iter + index->address_table_size;
1818 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1822 ULONGEST hi, lo, cu_index;
1823 lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
1825 hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
1827 cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE);
1830 addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1,
1831 dw2_get_cu (cu_index));
1834 objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map,
1835 &objfile->objfile_obstack);
1836 do_cleanups (cleanup);
1839 /* The hash function for strings in the mapped index. This is the
1840 same as the hashtab.c hash function, but we keep a separate copy to
1841 maintain control over the implementation. This is necessary
1842 because the hash function is tied to the format of the mapped index
1845 mapped_index_string_hash (const void *p)
1847 const unsigned char *str = (const unsigned char *) p;
1851 while ((c = *str++) != 0)
1852 r = r * 67 + c - 113;
1857 /* Find a slot in the mapped index INDEX for the object named NAME.
1858 If NAME is found, set *VEC_OUT to point to the CU vector in the
1859 constant pool and return 1. If NAME cannot be found, return 0. */
1861 find_slot_in_mapped_hash (struct mapped_index *index, const char *name,
1862 offset_type **vec_out)
1864 offset_type hash = mapped_index_string_hash (name);
1865 offset_type slot, step;
1867 slot = hash & (index->index_table_slots - 1);
1868 step = ((hash * 17) & (index->index_table_slots - 1)) | 1;
1872 /* Convert a slot number to an offset into the table. */
1873 offset_type i = 2 * slot;
1875 if (index->index_table[i] == 0 && index->index_table[i + 1] == 0)
1878 str = index->constant_pool + MAYBE_SWAP (index->index_table[i]);
1879 if (!strcmp (name, str))
1881 *vec_out = (offset_type *) (index->constant_pool
1882 + MAYBE_SWAP (index->index_table[i + 1]));
1886 slot = (slot + step) & (index->index_table_slots - 1);
1890 /* Read the index file. If everything went ok, initialize the "quick"
1891 elements of all the CUs and return 1. Otherwise, return 0. */
1893 dwarf2_read_index (struct objfile *objfile)
1896 struct mapped_index *map;
1897 offset_type *metadata;
1898 const gdb_byte *cu_list;
1899 const gdb_byte *types_list = NULL;
1900 offset_type version, cu_list_elements;
1901 offset_type types_list_elements = 0;
1904 if (dwarf2_per_objfile->gdb_index.asection == NULL
1905 || dwarf2_per_objfile->gdb_index.size == 0)
1908 /* Older elfutils strip versions could keep the section in the main
1909 executable while splitting it for the separate debug info file. */
1910 if ((bfd_get_file_flags (dwarf2_per_objfile->gdb_index.asection)
1911 & SEC_HAS_CONTENTS) == 0)
1914 dwarf2_read_section (objfile, &dwarf2_per_objfile->gdb_index);
1916 addr = dwarf2_per_objfile->gdb_index.buffer;
1917 /* Version check. */
1918 version = MAYBE_SWAP (*(offset_type *) addr);
1921 /* Index version 1 neglected to account for .debug_types. So,
1922 if we see .debug_types, we cannot use this index. */
1923 if (dwarf2_per_objfile->types.asection != NULL
1924 && dwarf2_per_objfile->types.size != 0)
1927 else if (version != 2)
1930 map = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct mapped_index);
1931 map->total_size = dwarf2_per_objfile->gdb_index.size;
1933 metadata = (offset_type *) (addr + sizeof (offset_type));
1936 cu_list = addr + MAYBE_SWAP (metadata[i]);
1937 cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i]))
1943 types_list = addr + MAYBE_SWAP (metadata[i]);
1944 types_list_elements = ((MAYBE_SWAP (metadata[i + 1])
1945 - MAYBE_SWAP (metadata[i]))
1950 map->address_table = addr + MAYBE_SWAP (metadata[i]);
1951 map->address_table_size = (MAYBE_SWAP (metadata[i + 1])
1952 - MAYBE_SWAP (metadata[i]));
1955 map->index_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i]));
1956 map->index_table_slots = ((MAYBE_SWAP (metadata[i + 1])
1957 - MAYBE_SWAP (metadata[i]))
1958 / (2 * sizeof (offset_type)));
1961 map->constant_pool = addr + MAYBE_SWAP (metadata[i]);
1963 if (!create_cus_from_index (objfile, cu_list, cu_list_elements))
1967 && types_list_elements
1968 && !create_signatured_type_table_from_index (objfile, types_list,
1969 types_list_elements))
1972 create_addrmap_from_index (objfile, map);
1974 dwarf2_per_objfile->index_table = map;
1975 dwarf2_per_objfile->using_index = 1;
1980 /* A helper for the "quick" functions which sets the global
1981 dwarf2_per_objfile according to OBJFILE. */
1983 dw2_setup (struct objfile *objfile)
1985 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
1986 gdb_assert (dwarf2_per_objfile);
1989 /* A helper for the "quick" functions which attempts to read the line
1990 table for THIS_CU. */
1992 dw2_require_line_header (struct objfile *objfile,
1993 struct dwarf2_per_cu_data *this_cu)
1995 bfd *abfd = objfile->obfd;
1996 struct line_header *lh = NULL;
1997 struct attribute *attr;
1998 struct cleanup *cleanups;
1999 struct die_info *comp_unit_die;
2000 struct dwarf2_section_info* sec;
2001 gdb_byte *beg_of_comp_unit, *info_ptr, *buffer;
2002 int has_children, i;
2003 struct dwarf2_cu cu;
2004 unsigned int bytes_read, buffer_size;
2005 struct die_reader_specs reader_specs;
2006 char *name, *comp_dir;
2008 if (this_cu->v.quick->read_lines)
2010 this_cu->v.quick->read_lines = 1;
2012 memset (&cu, 0, sizeof (cu));
2013 cu.objfile = objfile;
2014 obstack_init (&cu.comp_unit_obstack);
2016 cleanups = make_cleanup (free_stack_comp_unit, &cu);
2018 if (this_cu->from_debug_types)
2019 sec = &dwarf2_per_objfile->types;
2021 sec = &dwarf2_per_objfile->info;
2022 dwarf2_read_section (objfile, sec);
2023 buffer_size = sec->size;
2024 buffer = sec->buffer;
2025 info_ptr = buffer + this_cu->offset;
2026 beg_of_comp_unit = info_ptr;
2028 info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
2029 buffer, buffer_size,
2032 /* Complete the cu_header. */
2033 cu.header.offset = beg_of_comp_unit - buffer;
2034 cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
2037 cu.per_cu = this_cu;
2039 dwarf2_read_abbrevs (abfd, &cu);
2040 make_cleanup (dwarf2_free_abbrev_table, &cu);
2042 if (this_cu->from_debug_types)
2043 info_ptr += 8 /*signature*/ + cu.header.offset_size;
2044 init_cu_die_reader (&reader_specs, &cu);
2045 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
2048 attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, &cu);
2051 unsigned int line_offset = DW_UNSND (attr);
2052 lh = dwarf_decode_line_header (line_offset, abfd, &cu);
2056 do_cleanups (cleanups);
2060 find_file_and_directory (comp_unit_die, &cu, &name, &comp_dir);
2062 this_cu->v.quick->lines = lh;
2064 this_cu->v.quick->file_names
2065 = obstack_alloc (&objfile->objfile_obstack,
2066 lh->num_file_names * sizeof (char *));
2067 for (i = 0; i < lh->num_file_names; ++i)
2068 this_cu->v.quick->file_names[i] = file_full_name (i + 1, lh, comp_dir);
2070 do_cleanups (cleanups);
2073 /* A helper for the "quick" functions which computes and caches the
2074 real path for a given file name from the line table.
2075 dw2_require_line_header must have been called before this is
2078 dw2_require_full_path (struct objfile *objfile,
2079 struct dwarf2_per_cu_data *per_cu,
2082 if (!per_cu->v.quick->full_names)
2083 per_cu->v.quick->full_names
2084 = OBSTACK_CALLOC (&objfile->objfile_obstack,
2085 per_cu->v.quick->lines->num_file_names,
2088 if (!per_cu->v.quick->full_names[index])
2089 per_cu->v.quick->full_names[index]
2090 = gdb_realpath (per_cu->v.quick->file_names[index]);
2092 return per_cu->v.quick->full_names[index];
2095 static struct symtab *
2096 dw2_find_last_source_symtab (struct objfile *objfile)
2099 dw2_setup (objfile);
2100 index = dwarf2_per_objfile->n_comp_units - 1;
2101 return dw2_instantiate_symtab (objfile, dw2_get_cu (index));
2105 dw2_forget_cached_source_info (struct objfile *objfile)
2109 dw2_setup (objfile);
2110 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2111 + dwarf2_per_objfile->n_type_comp_units); ++i)
2113 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2115 if (per_cu->v.quick->full_names)
2119 for (j = 0; j < per_cu->v.quick->lines->num_file_names; ++j)
2120 xfree ((void *) per_cu->v.quick->full_names[j]);
2126 dw2_lookup_symtab (struct objfile *objfile, const char *name,
2127 const char *full_path, const char *real_path,
2128 struct symtab **result)
2131 int check_basename = lbasename (name) == name;
2132 struct dwarf2_per_cu_data *base_cu = NULL;
2134 dw2_setup (objfile);
2135 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2136 + dwarf2_per_objfile->n_type_comp_units); ++i)
2139 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2141 if (per_cu->v.quick->symtab)
2144 dw2_require_line_header (objfile, per_cu);
2145 if (!per_cu->v.quick->lines)
2148 for (j = 0; j < per_cu->v.quick->lines->num_file_names; ++j)
2150 const char *this_name = per_cu->v.quick->file_names[j];
2152 if (FILENAME_CMP (name, this_name) == 0)
2154 *result = dw2_instantiate_symtab (objfile, per_cu);
2158 if (check_basename && ! base_cu
2159 && FILENAME_CMP (lbasename (this_name), name) == 0)
2162 if (full_path != NULL)
2164 const char *this_full_name = dw2_require_full_path (objfile,
2168 && FILENAME_CMP (full_path, this_full_name) == 0)
2170 *result = dw2_instantiate_symtab (objfile, per_cu);
2175 if (real_path != NULL)
2177 const char *this_full_name = dw2_require_full_path (objfile,
2180 if (this_full_name != NULL)
2182 char *rp = gdb_realpath (this_full_name);
2183 if (rp != NULL && FILENAME_CMP (real_path, rp) == 0)
2186 *result = dw2_instantiate_symtab (objfile, per_cu);
2197 *result = dw2_instantiate_symtab (objfile, base_cu);
2204 static struct symtab *
2205 dw2_lookup_symbol (struct objfile *objfile, int block_index,
2206 const char *name, domain_enum domain)
2208 /* We do all the work in the pre_expand_symtabs_matching hook
2213 /* A helper function that expands all symtabs that hold an object
2216 dw2_do_expand_symtabs_matching (struct objfile *objfile, const char *name)
2218 dw2_setup (objfile);
2220 if (dwarf2_per_objfile->index_table)
2224 if (find_slot_in_mapped_hash (dwarf2_per_objfile->index_table,
2227 offset_type i, len = MAYBE_SWAP (*vec);
2228 for (i = 0; i < len; ++i)
2230 offset_type cu_index = MAYBE_SWAP (vec[i + 1]);
2231 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (cu_index);
2233 dw2_instantiate_symtab (objfile, per_cu);
2240 dw2_pre_expand_symtabs_matching (struct objfile *objfile,
2241 int kind, const char *name,
2244 dw2_do_expand_symtabs_matching (objfile, name);
2248 dw2_print_stats (struct objfile *objfile)
2252 dw2_setup (objfile);
2254 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2255 + dwarf2_per_objfile->n_type_comp_units); ++i)
2257 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2259 if (!per_cu->v.quick->symtab)
2262 printf_filtered (_(" Number of unread CUs: %d\n"), count);
2266 dw2_dump (struct objfile *objfile)
2268 /* Nothing worth printing. */
2272 dw2_relocate (struct objfile *objfile, struct section_offsets *new_offsets,
2273 struct section_offsets *delta)
2275 /* There's nothing to relocate here. */
2279 dw2_expand_symtabs_for_function (struct objfile *objfile,
2280 const char *func_name)
2282 dw2_do_expand_symtabs_matching (objfile, func_name);
2286 dw2_expand_all_symtabs (struct objfile *objfile)
2290 dw2_setup (objfile);
2292 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2293 + dwarf2_per_objfile->n_type_comp_units); ++i)
2295 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2297 dw2_instantiate_symtab (objfile, per_cu);
2302 dw2_expand_symtabs_with_filename (struct objfile *objfile,
2303 const char *filename)
2307 dw2_setup (objfile);
2308 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2309 + dwarf2_per_objfile->n_type_comp_units); ++i)
2312 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2314 if (per_cu->v.quick->symtab)
2317 dw2_require_line_header (objfile, per_cu);
2318 if (!per_cu->v.quick->lines)
2321 for (j = 0; j < per_cu->v.quick->lines->num_file_names; ++j)
2323 const char *this_name = per_cu->v.quick->file_names[j];
2324 if (strcmp (this_name, filename) == 0)
2326 dw2_instantiate_symtab (objfile, per_cu);
2334 dw2_find_symbol_file (struct objfile *objfile, const char *name)
2336 struct dwarf2_per_cu_data *per_cu;
2339 dw2_setup (objfile);
2341 if (!dwarf2_per_objfile->index_table)
2344 if (!find_slot_in_mapped_hash (dwarf2_per_objfile->index_table,
2348 /* Note that this just looks at the very first one named NAME -- but
2349 actually we are looking for a function. find_main_filename
2350 should be rewritten so that it doesn't require a custom hook. It
2351 could just use the ordinary symbol tables. */
2352 /* vec[0] is the length, which must always be >0. */
2353 per_cu = dw2_get_cu (MAYBE_SWAP (vec[1]));
2355 dw2_require_line_header (objfile, per_cu);
2356 if (!per_cu->v.quick->lines)
2359 return per_cu->v.quick->file_names[per_cu->v.quick->lines->num_file_names - 1];
2363 dw2_map_ada_symtabs (struct objfile *objfile,
2364 int (*wild_match) (const char *, int, const char *),
2365 int (*is_name_suffix) (const char *),
2366 void (*callback) (struct objfile *,
2367 struct symtab *, void *),
2368 const char *name, int global,
2369 domain_enum namespace, int wild,
2372 /* For now, we don't support Ada, so this function can't be
2374 internal_error (__FILE__, __LINE__,
2375 _("map_ada_symtabs called via index method"));
2379 dw2_expand_symtabs_matching (struct objfile *objfile,
2380 int (*file_matcher) (const char *, void *),
2381 int (*name_matcher) (const char *, void *),
2388 dw2_setup (objfile);
2389 if (!dwarf2_per_objfile->index_table)
2392 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2393 + dwarf2_per_objfile->n_type_comp_units); ++i)
2396 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2398 per_cu->v.quick->mark = 0;
2399 if (per_cu->v.quick->symtab)
2402 dw2_require_line_header (objfile, per_cu);
2403 if (!per_cu->v.quick->lines)
2406 for (j = 0; j < per_cu->v.quick->lines->num_file_names; ++j)
2408 if (file_matcher (per_cu->v.quick->file_names[j], data))
2410 per_cu->v.quick->mark = 1;
2417 iter < dwarf2_per_objfile->index_table->index_table_slots;
2420 offset_type idx = 2 * iter;
2422 offset_type *vec, vec_len, vec_idx;
2424 if (dwarf2_per_objfile->index_table->index_table[idx] == 0
2425 && dwarf2_per_objfile->index_table->index_table[idx + 1] == 0)
2428 name = (dwarf2_per_objfile->index_table->constant_pool
2429 + dwarf2_per_objfile->index_table->index_table[idx]);
2431 if (! (*name_matcher) (name, data))
2434 /* The name was matched, now expand corresponding CUs that were
2436 vec = (offset_type *) (dwarf2_per_objfile->index_table->constant_pool
2437 + dwarf2_per_objfile->index_table->index_table[idx + 1]);
2438 vec_len = MAYBE_SWAP (vec[0]);
2439 for (vec_idx = 0; vec_idx < vec_len; ++vec_idx)
2441 struct dwarf2_per_cu_data *per_cu;
2443 per_cu = dw2_get_cu (MAYBE_SWAP (vec[vec_idx + 1]));
2444 if (per_cu->v.quick->mark)
2445 dw2_instantiate_symtab (objfile, per_cu);
2450 static struct symtab *
2451 dw2_find_pc_sect_symtab (struct objfile *objfile,
2452 struct minimal_symbol *msymbol,
2454 struct obj_section *section,
2457 struct dwarf2_per_cu_data *data;
2459 dw2_setup (objfile);
2461 if (!objfile->psymtabs_addrmap)
2464 data = addrmap_find (objfile->psymtabs_addrmap, pc);
2468 if (warn_if_readin && data->v.quick->symtab)
2469 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
2470 paddress (get_objfile_arch (objfile), pc));
2472 return dw2_instantiate_symtab (objfile, data);
2476 dw2_map_symbol_names (struct objfile *objfile,
2477 void (*fun) (const char *, void *),
2481 dw2_setup (objfile);
2483 if (!dwarf2_per_objfile->index_table)
2487 iter < dwarf2_per_objfile->index_table->index_table_slots;
2490 offset_type idx = 2 * iter;
2492 offset_type *vec, vec_len, vec_idx;
2494 if (dwarf2_per_objfile->index_table->index_table[idx] == 0
2495 && dwarf2_per_objfile->index_table->index_table[idx + 1] == 0)
2498 name = (dwarf2_per_objfile->index_table->constant_pool
2499 + dwarf2_per_objfile->index_table->index_table[idx]);
2501 (*fun) (name, data);
2506 dw2_map_symbol_filenames (struct objfile *objfile,
2507 void (*fun) (const char *, const char *, void *),
2512 dw2_setup (objfile);
2513 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2514 + dwarf2_per_objfile->n_type_comp_units); ++i)
2517 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2519 if (per_cu->v.quick->symtab)
2522 dw2_require_line_header (objfile, per_cu);
2523 if (!per_cu->v.quick->lines)
2526 for (j = 0; j < per_cu->v.quick->lines->num_file_names; ++j)
2528 const char *this_full_name = dw2_require_full_path (objfile, per_cu,
2530 (*fun) (per_cu->v.quick->file_names[j], this_full_name, data);
2536 dw2_has_symbols (struct objfile *objfile)
2541 const struct quick_symbol_functions dwarf2_gdb_index_functions =
2544 dw2_find_last_source_symtab,
2545 dw2_forget_cached_source_info,
2548 dw2_pre_expand_symtabs_matching,
2552 dw2_expand_symtabs_for_function,
2553 dw2_expand_all_symtabs,
2554 dw2_expand_symtabs_with_filename,
2555 dw2_find_symbol_file,
2556 dw2_map_ada_symtabs,
2557 dw2_expand_symtabs_matching,
2558 dw2_find_pc_sect_symtab,
2559 dw2_map_symbol_names,
2560 dw2_map_symbol_filenames
2563 /* Initialize for reading DWARF for this objfile. Return 0 if this
2564 file will use psymtabs, or 1 if using the GNU index. */
2567 dwarf2_initialize_objfile (struct objfile *objfile)
2569 /* If we're about to read full symbols, don't bother with the
2570 indices. In this case we also don't care if some other debug
2571 format is making psymtabs, because they are all about to be
2573 if ((objfile->flags & OBJF_READNOW))
2577 dwarf2_per_objfile->using_index = 1;
2578 create_all_comp_units (objfile);
2579 create_debug_types_hash_table (objfile);
2581 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2582 + dwarf2_per_objfile->n_type_comp_units); ++i)
2584 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2586 per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2587 struct dwarf2_per_cu_quick_data);
2590 /* Return 1 so that gdb sees the "quick" functions. However,
2591 these functions will be no-ops because we will have expanded
2596 if (dwarf2_read_index (objfile))
2599 dwarf2_build_psymtabs (objfile);
2605 /* Build a partial symbol table. */
2608 dwarf2_build_psymtabs (struct objfile *objfile)
2610 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
2612 init_psymbol_list (objfile, 1024);
2615 dwarf2_build_psymtabs_hard (objfile);
2618 /* Return TRUE if OFFSET is within CU_HEADER. */
2621 offset_in_cu_p (const struct comp_unit_head *cu_header, unsigned int offset)
2623 unsigned int bottom = cu_header->offset;
2624 unsigned int top = (cu_header->offset
2626 + cu_header->initial_length_size);
2628 return (offset >= bottom && offset < top);
2631 /* Read in the comp unit header information from the debug_info at info_ptr.
2632 NOTE: This leaves members offset, first_die_offset to be filled in
2636 read_comp_unit_head (struct comp_unit_head *cu_header,
2637 gdb_byte *info_ptr, bfd *abfd)
2640 unsigned int bytes_read;
2642 cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read);
2643 cu_header->initial_length_size = bytes_read;
2644 cu_header->offset_size = (bytes_read == 4) ? 4 : 8;
2645 info_ptr += bytes_read;
2646 cu_header->version = read_2_bytes (abfd, info_ptr);
2648 cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
2650 info_ptr += bytes_read;
2651 cu_header->addr_size = read_1_byte (abfd, info_ptr);
2653 signed_addr = bfd_get_sign_extend_vma (abfd);
2654 if (signed_addr < 0)
2655 internal_error (__FILE__, __LINE__,
2656 _("read_comp_unit_head: dwarf from non elf file"));
2657 cu_header->signed_addr_p = signed_addr;
2663 partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
2664 gdb_byte *buffer, unsigned int buffer_size,
2667 gdb_byte *beg_of_comp_unit = info_ptr;
2669 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
2671 if (header->version != 2 && header->version != 3 && header->version != 4)
2672 error (_("Dwarf Error: wrong version in compilation unit header "
2673 "(is %d, should be 2, 3, or 4) [in module %s]"), header->version,
2674 bfd_get_filename (abfd));
2676 if (header->abbrev_offset >= dwarf2_per_objfile->abbrev.size)
2677 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
2678 "(offset 0x%lx + 6) [in module %s]"),
2679 (long) header->abbrev_offset,
2680 (long) (beg_of_comp_unit - buffer),
2681 bfd_get_filename (abfd));
2683 if (beg_of_comp_unit + header->length + header->initial_length_size
2684 > buffer + buffer_size)
2685 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
2686 "(offset 0x%lx + 0) [in module %s]"),
2687 (long) header->length,
2688 (long) (beg_of_comp_unit - buffer),
2689 bfd_get_filename (abfd));
2694 /* Read in the types comp unit header information from .debug_types entry at
2695 types_ptr. The result is a pointer to one past the end of the header. */
2698 read_type_comp_unit_head (struct comp_unit_head *cu_header,
2699 ULONGEST *signature,
2700 gdb_byte *types_ptr, bfd *abfd)
2702 gdb_byte *initial_types_ptr = types_ptr;
2704 dwarf2_read_section (dwarf2_per_objfile->objfile,
2705 &dwarf2_per_objfile->types);
2706 cu_header->offset = types_ptr - dwarf2_per_objfile->types.buffer;
2708 types_ptr = read_comp_unit_head (cu_header, types_ptr, abfd);
2710 *signature = read_8_bytes (abfd, types_ptr);
2712 types_ptr += cu_header->offset_size;
2713 cu_header->first_die_offset = types_ptr - initial_types_ptr;
2718 /* Allocate a new partial symtab for file named NAME and mark this new
2719 partial symtab as being an include of PST. */
2722 dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
2723 struct objfile *objfile)
2725 struct partial_symtab *subpst = allocate_psymtab (name, objfile);
2727 subpst->section_offsets = pst->section_offsets;
2728 subpst->textlow = 0;
2729 subpst->texthigh = 0;
2731 subpst->dependencies = (struct partial_symtab **)
2732 obstack_alloc (&objfile->objfile_obstack,
2733 sizeof (struct partial_symtab *));
2734 subpst->dependencies[0] = pst;
2735 subpst->number_of_dependencies = 1;
2737 subpst->globals_offset = 0;
2738 subpst->n_global_syms = 0;
2739 subpst->statics_offset = 0;
2740 subpst->n_static_syms = 0;
2741 subpst->symtab = NULL;
2742 subpst->read_symtab = pst->read_symtab;
2745 /* No private part is necessary for include psymtabs. This property
2746 can be used to differentiate between such include psymtabs and
2747 the regular ones. */
2748 subpst->read_symtab_private = NULL;
2751 /* Read the Line Number Program data and extract the list of files
2752 included by the source file represented by PST. Build an include
2753 partial symtab for each of these included files. */
2756 dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
2757 struct die_info *die,
2758 struct partial_symtab *pst)
2760 struct objfile *objfile = cu->objfile;
2761 bfd *abfd = objfile->obfd;
2762 struct line_header *lh = NULL;
2763 struct attribute *attr;
2765 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
2768 unsigned int line_offset = DW_UNSND (attr);
2770 lh = dwarf_decode_line_header (line_offset, abfd, cu);
2773 return; /* No linetable, so no includes. */
2775 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
2776 dwarf_decode_lines (lh, pst->dirname, abfd, cu, pst);
2778 free_line_header (lh);
2782 hash_type_signature (const void *item)
2784 const struct signatured_type *type_sig = item;
2786 /* This drops the top 32 bits of the signature, but is ok for a hash. */
2787 return type_sig->signature;
2791 eq_type_signature (const void *item_lhs, const void *item_rhs)
2793 const struct signatured_type *lhs = item_lhs;
2794 const struct signatured_type *rhs = item_rhs;
2796 return lhs->signature == rhs->signature;
2799 /* Allocate a hash table for signatured types. */
2802 allocate_signatured_type_table (struct objfile *objfile)
2804 return htab_create_alloc_ex (41,
2805 hash_type_signature,
2808 &objfile->objfile_obstack,
2809 hashtab_obstack_allocate,
2810 dummy_obstack_deallocate);
2813 /* A helper function to add a signatured type CU to a list. */
2816 add_signatured_type_cu_to_list (void **slot, void *datum)
2818 struct signatured_type *sigt = *slot;
2819 struct dwarf2_per_cu_data ***datap = datum;
2821 **datap = &sigt->per_cu;
2827 /* Create the hash table of all entries in the .debug_types section.
2828 The result is zero if there is an error (e.g. missing .debug_types section),
2829 otherwise non-zero. */
2832 create_debug_types_hash_table (struct objfile *objfile)
2836 struct dwarf2_per_cu_data **iter;
2838 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
2839 info_ptr = dwarf2_per_objfile->types.buffer;
2841 if (info_ptr == NULL)
2843 dwarf2_per_objfile->signatured_types = NULL;
2847 types_htab = allocate_signatured_type_table (objfile);
2849 if (dwarf2_die_debug)
2850 fprintf_unfiltered (gdb_stdlog, "Signatured types:\n");
2852 while (info_ptr < dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
2854 unsigned int offset;
2855 unsigned int offset_size;
2856 unsigned int type_offset;
2857 unsigned int length, initial_length_size;
2858 unsigned short version;
2860 struct signatured_type *type_sig;
2862 gdb_byte *ptr = info_ptr;
2864 offset = ptr - dwarf2_per_objfile->types.buffer;
2866 /* We need to read the type's signature in order to build the hash
2867 table, but we don't need to read anything else just yet. */
2869 /* Sanity check to ensure entire cu is present. */
2870 length = read_initial_length (objfile->obfd, ptr, &initial_length_size);
2871 if (ptr + length + initial_length_size
2872 > dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
2874 complaint (&symfile_complaints,
2875 _("debug type entry runs off end of `.debug_types' section, ignored"));
2879 offset_size = initial_length_size == 4 ? 4 : 8;
2880 ptr += initial_length_size;
2881 version = bfd_get_16 (objfile->obfd, ptr);
2883 ptr += offset_size; /* abbrev offset */
2884 ptr += 1; /* address size */
2885 signature = bfd_get_64 (objfile->obfd, ptr);
2887 type_offset = read_offset_1 (objfile->obfd, ptr, offset_size);
2889 type_sig = obstack_alloc (&objfile->objfile_obstack, sizeof (*type_sig));
2890 memset (type_sig, 0, sizeof (*type_sig));
2891 type_sig->signature = signature;
2892 type_sig->offset = offset;
2893 type_sig->type_offset = type_offset;
2894 type_sig->per_cu.objfile = objfile;
2895 type_sig->per_cu.from_debug_types = 1;
2897 slot = htab_find_slot (types_htab, type_sig, INSERT);
2898 gdb_assert (slot != NULL);
2901 if (dwarf2_die_debug)
2902 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n",
2903 offset, phex (signature, sizeof (signature)));
2905 info_ptr = info_ptr + initial_length_size + length;
2908 dwarf2_per_objfile->signatured_types = types_htab;
2910 dwarf2_per_objfile->n_type_comp_units = htab_elements (types_htab);
2911 dwarf2_per_objfile->type_comp_units
2912 = obstack_alloc (&objfile->objfile_obstack,
2913 dwarf2_per_objfile->n_type_comp_units
2914 * sizeof (struct dwarf2_per_cu_data *));
2915 iter = &dwarf2_per_objfile->type_comp_units[0];
2916 htab_traverse_noresize (types_htab, add_signatured_type_cu_to_list, &iter);
2917 gdb_assert (iter - &dwarf2_per_objfile->type_comp_units[0]
2918 == dwarf2_per_objfile->n_type_comp_units);
2923 /* Lookup a signature based type.
2924 Returns NULL if SIG is not present in the table. */
2926 static struct signatured_type *
2927 lookup_signatured_type (struct objfile *objfile, ULONGEST sig)
2929 struct signatured_type find_entry, *entry;
2931 if (dwarf2_per_objfile->signatured_types == NULL)
2933 complaint (&symfile_complaints,
2934 _("missing `.debug_types' section for DW_FORM_sig8 die"));
2938 find_entry.signature = sig;
2939 entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
2943 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
2946 init_cu_die_reader (struct die_reader_specs *reader,
2947 struct dwarf2_cu *cu)
2949 reader->abfd = cu->objfile->obfd;
2951 if (cu->per_cu->from_debug_types)
2953 gdb_assert (dwarf2_per_objfile->types.readin);
2954 reader->buffer = dwarf2_per_objfile->types.buffer;
2958 gdb_assert (dwarf2_per_objfile->info.readin);
2959 reader->buffer = dwarf2_per_objfile->info.buffer;
2963 /* Find the base address of the compilation unit for range lists and
2964 location lists. It will normally be specified by DW_AT_low_pc.
2965 In DWARF-3 draft 4, the base address could be overridden by
2966 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2967 compilation units with discontinuous ranges. */
2970 dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu)
2972 struct attribute *attr;
2975 cu->base_address = 0;
2977 attr = dwarf2_attr (die, DW_AT_entry_pc, cu);
2980 cu->base_address = DW_ADDR (attr);
2985 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
2988 cu->base_address = DW_ADDR (attr);
2994 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
2995 to combine the common parts.
2996 Process a compilation unit for a psymtab.
2997 BUFFER is a pointer to the beginning of the dwarf section buffer,
2998 either .debug_info or debug_types.
2999 INFO_PTR is a pointer to the start of the CU.
3000 Returns a pointer to the next CU. */
3003 process_psymtab_comp_unit (struct objfile *objfile,
3004 struct dwarf2_per_cu_data *this_cu,
3005 gdb_byte *buffer, gdb_byte *info_ptr,
3006 unsigned int buffer_size)
3008 bfd *abfd = objfile->obfd;
3009 gdb_byte *beg_of_comp_unit = info_ptr;
3010 struct die_info *comp_unit_die;
3011 struct partial_symtab *pst;
3013 struct cleanup *back_to_inner;
3014 struct dwarf2_cu cu;
3015 int has_children, has_pc_info;
3016 struct attribute *attr;
3017 CORE_ADDR best_lowpc = 0, best_highpc = 0;
3018 struct die_reader_specs reader_specs;
3020 memset (&cu, 0, sizeof (cu));
3021 cu.objfile = objfile;
3022 obstack_init (&cu.comp_unit_obstack);
3024 back_to_inner = make_cleanup (free_stack_comp_unit, &cu);
3026 info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
3027 buffer, buffer_size,
3030 /* Complete the cu_header. */
3031 cu.header.offset = beg_of_comp_unit - buffer;
3032 cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
3034 cu.list_in_scope = &file_symbols;
3036 /* If this compilation unit was already read in, free the
3037 cached copy in order to read it in again. This is
3038 necessary because we skipped some symbols when we first
3039 read in the compilation unit (see load_partial_dies).
3040 This problem could be avoided, but the benefit is
3042 if (this_cu->cu != NULL)
3043 free_one_cached_comp_unit (this_cu->cu);
3045 /* Note that this is a pointer to our stack frame, being
3046 added to a global data structure. It will be cleaned up
3047 in free_stack_comp_unit when we finish with this
3048 compilation unit. */
3050 cu.per_cu = this_cu;
3052 /* Read the abbrevs for this compilation unit into a table. */
3053 dwarf2_read_abbrevs (abfd, &cu);
3054 make_cleanup (dwarf2_free_abbrev_table, &cu);
3056 /* Read the compilation unit die. */
3057 if (this_cu->from_debug_types)
3058 info_ptr += 8 /*signature*/ + cu.header.offset_size;
3059 init_cu_die_reader (&reader_specs, &cu);
3060 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
3063 if (this_cu->from_debug_types)
3065 /* offset,length haven't been set yet for type units. */
3066 this_cu->offset = cu.header.offset;
3067 this_cu->length = cu.header.length + cu.header.initial_length_size;
3069 else if (comp_unit_die->tag == DW_TAG_partial_unit)
3071 info_ptr = (beg_of_comp_unit + cu.header.length
3072 + cu.header.initial_length_size);
3073 do_cleanups (back_to_inner);
3077 /* Set the language we're debugging. */
3078 attr = dwarf2_attr (comp_unit_die, DW_AT_language, &cu);
3080 set_cu_language (DW_UNSND (attr), &cu);
3082 set_cu_language (language_minimal, &cu);
3084 /* Allocate a new partial symbol table structure. */
3085 attr = dwarf2_attr (comp_unit_die, DW_AT_name, &cu);
3086 pst = start_psymtab_common (objfile, objfile->section_offsets,
3087 (attr != NULL) ? DW_STRING (attr) : "",
3088 /* TEXTLOW and TEXTHIGH are set below. */
3090 objfile->global_psymbols.next,
3091 objfile->static_psymbols.next);
3093 attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, &cu);
3095 pst->dirname = DW_STRING (attr);
3097 pst->read_symtab_private = this_cu;
3099 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3101 /* Store the function that reads in the rest of the symbol table */
3102 pst->read_symtab = dwarf2_psymtab_to_symtab;
3104 this_cu->v.psymtab = pst;
3106 dwarf2_find_base_address (comp_unit_die, &cu);
3108 /* Possibly set the default values of LOWPC and HIGHPC from
3110 has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc,
3111 &best_highpc, &cu, pst);
3112 if (has_pc_info == 1 && best_lowpc < best_highpc)
3113 /* Store the contiguous range if it is not empty; it can be empty for
3114 CUs with no code. */
3115 addrmap_set_empty (objfile->psymtabs_addrmap,
3116 best_lowpc + baseaddr,
3117 best_highpc + baseaddr - 1, pst);
3119 /* Check if comp unit has_children.
3120 If so, read the rest of the partial symbols from this comp unit.
3121 If not, there's no more debug_info for this comp unit. */
3124 struct partial_die_info *first_die;
3125 CORE_ADDR lowpc, highpc;
3127 lowpc = ((CORE_ADDR) -1);
3128 highpc = ((CORE_ADDR) 0);
3130 first_die = load_partial_dies (abfd, buffer, info_ptr, 1, &cu);
3132 scan_partial_symbols (first_die, &lowpc, &highpc,
3133 ! has_pc_info, &cu);
3135 /* If we didn't find a lowpc, set it to highpc to avoid
3136 complaints from `maint check'. */
3137 if (lowpc == ((CORE_ADDR) -1))
3140 /* If the compilation unit didn't have an explicit address range,
3141 then use the information extracted from its child dies. */
3145 best_highpc = highpc;
3148 pst->textlow = best_lowpc + baseaddr;
3149 pst->texthigh = best_highpc + baseaddr;
3151 pst->n_global_syms = objfile->global_psymbols.next -
3152 (objfile->global_psymbols.list + pst->globals_offset);
3153 pst->n_static_syms = objfile->static_psymbols.next -
3154 (objfile->static_psymbols.list + pst->statics_offset);
3155 sort_pst_symbols (pst);
3157 info_ptr = (beg_of_comp_unit + cu.header.length
3158 + cu.header.initial_length_size);
3160 if (this_cu->from_debug_types)
3162 /* It's not clear we want to do anything with stmt lists here.
3163 Waiting to see what gcc ultimately does. */
3167 /* Get the list of files included in the current compilation unit,
3168 and build a psymtab for each of them. */
3169 dwarf2_build_include_psymtabs (&cu, comp_unit_die, pst);
3172 do_cleanups (back_to_inner);
3177 /* Traversal function for htab_traverse_noresize.
3178 Process one .debug_types comp-unit. */
3181 process_type_comp_unit (void **slot, void *info)
3183 struct signatured_type *entry = (struct signatured_type *) *slot;
3184 struct objfile *objfile = (struct objfile *) info;
3185 struct dwarf2_per_cu_data *this_cu;
3187 this_cu = &entry->per_cu;
3189 gdb_assert (dwarf2_per_objfile->types.readin);
3190 process_psymtab_comp_unit (objfile, this_cu,
3191 dwarf2_per_objfile->types.buffer,
3192 dwarf2_per_objfile->types.buffer + entry->offset,
3193 dwarf2_per_objfile->types.size);
3198 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
3199 Build partial symbol tables for the .debug_types comp-units. */
3202 build_type_psymtabs (struct objfile *objfile)
3204 if (! create_debug_types_hash_table (objfile))
3207 htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
3208 process_type_comp_unit, objfile);
3211 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
3214 psymtabs_addrmap_cleanup (void *o)
3216 struct objfile *objfile = o;
3218 objfile->psymtabs_addrmap = NULL;
3221 /* Build the partial symbol table by doing a quick pass through the
3222 .debug_info and .debug_abbrev sections. */
3225 dwarf2_build_psymtabs_hard (struct objfile *objfile)
3228 struct cleanup *back_to, *addrmap_cleanup;
3229 struct obstack temp_obstack;
3231 dwarf2_per_objfile->reading_partial_symbols = 1;
3233 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
3234 info_ptr = dwarf2_per_objfile->info.buffer;
3236 /* Any cached compilation units will be linked by the per-objfile
3237 read_in_chain. Make sure to free them when we're done. */
3238 back_to = make_cleanup (free_cached_comp_units, NULL);
3240 build_type_psymtabs (objfile);
3242 create_all_comp_units (objfile);
3244 /* Create a temporary address map on a temporary obstack. We later
3245 copy this to the final obstack. */
3246 obstack_init (&temp_obstack);
3247 make_cleanup_obstack_free (&temp_obstack);
3248 objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack);
3249 addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile);
3251 /* Since the objects we're extracting from .debug_info vary in
3252 length, only the individual functions to extract them (like
3253 read_comp_unit_head and load_partial_die) can really know whether
3254 the buffer is large enough to hold another complete object.
3256 At the moment, they don't actually check that. If .debug_info
3257 holds just one extra byte after the last compilation unit's dies,
3258 then read_comp_unit_head will happily read off the end of the
3259 buffer. read_partial_die is similarly casual. Those functions
3262 For this loop condition, simply checking whether there's any data
3263 left at all should be sufficient. */
3265 while (info_ptr < (dwarf2_per_objfile->info.buffer
3266 + dwarf2_per_objfile->info.size))
3268 struct dwarf2_per_cu_data *this_cu;
3270 this_cu = dwarf2_find_comp_unit (info_ptr - dwarf2_per_objfile->info.buffer,
3273 info_ptr = process_psymtab_comp_unit (objfile, this_cu,
3274 dwarf2_per_objfile->info.buffer,
3276 dwarf2_per_objfile->info.size);
3279 objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
3280 &objfile->objfile_obstack);
3281 discard_cleanups (addrmap_cleanup);
3283 do_cleanups (back_to);
3286 /* Load the partial DIEs for a secondary CU into memory. */
3289 load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu,
3290 struct objfile *objfile)
3292 bfd *abfd = objfile->obfd;
3293 gdb_byte *info_ptr, *beg_of_comp_unit;
3294 struct die_info *comp_unit_die;
3295 struct dwarf2_cu *cu;
3296 struct cleanup *free_abbrevs_cleanup, *free_cu_cleanup = NULL;
3297 struct attribute *attr;
3299 struct die_reader_specs reader_specs;
3302 gdb_assert (! this_cu->from_debug_types);
3304 gdb_assert (dwarf2_per_objfile->info.readin);
3305 info_ptr = dwarf2_per_objfile->info.buffer + this_cu->offset;
3306 beg_of_comp_unit = info_ptr;
3308 if (this_cu->cu == NULL)
3310 cu = alloc_one_comp_unit (objfile);
3314 /* If an error occurs while loading, release our storage. */
3315 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
3317 info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr,
3318 dwarf2_per_objfile->info.buffer,
3319 dwarf2_per_objfile->info.size,
3322 /* Complete the cu_header. */
3323 cu->header.offset = this_cu->offset;
3324 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
3326 /* Link this compilation unit into the compilation unit tree. */
3328 cu->per_cu = this_cu;
3330 /* Link this CU into read_in_chain. */
3331 this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
3332 dwarf2_per_objfile->read_in_chain = this_cu;
3337 info_ptr += cu->header.first_die_offset;
3340 /* Read the abbrevs for this compilation unit into a table. */
3341 gdb_assert (cu->dwarf2_abbrevs == NULL);
3342 dwarf2_read_abbrevs (abfd, cu);
3343 free_abbrevs_cleanup = make_cleanup (dwarf2_free_abbrev_table, cu);
3345 /* Read the compilation unit die. */
3346 init_cu_die_reader (&reader_specs, cu);
3347 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
3350 /* Set the language we're debugging. */
3351 attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu);
3353 set_cu_language (DW_UNSND (attr), cu);
3355 set_cu_language (language_minimal, cu);
3357 /* Check if comp unit has_children.
3358 If so, read the rest of the partial symbols from this comp unit.
3359 If not, there's no more debug_info for this comp unit. */
3361 load_partial_dies (abfd, dwarf2_per_objfile->info.buffer, info_ptr, 0, cu);
3363 do_cleanups (free_abbrevs_cleanup);
3367 /* We've successfully allocated this compilation unit. Let our
3368 caller clean it up when finished with it. */
3369 discard_cleanups (free_cu_cleanup);
3373 /* Create a list of all compilation units in OBJFILE. We do this only
3374 if an inter-comp-unit reference is found; presumably if there is one,
3375 there will be many, and one will occur early in the .debug_info section.
3376 So there's no point in building this list incrementally. */
3379 create_all_comp_units (struct objfile *objfile)
3383 struct dwarf2_per_cu_data **all_comp_units;
3386 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
3387 info_ptr = dwarf2_per_objfile->info.buffer;
3391 all_comp_units = xmalloc (n_allocated
3392 * sizeof (struct dwarf2_per_cu_data *));
3394 while (info_ptr < dwarf2_per_objfile->info.buffer + dwarf2_per_objfile->info.size)
3396 unsigned int length, initial_length_size;
3397 struct dwarf2_per_cu_data *this_cu;
3398 unsigned int offset;
3400 offset = info_ptr - dwarf2_per_objfile->info.buffer;
3402 /* Read just enough information to find out where the next
3403 compilation unit is. */
3404 length = read_initial_length (objfile->obfd, info_ptr,
3405 &initial_length_size);
3407 /* Save the compilation unit for later lookup. */
3408 this_cu = obstack_alloc (&objfile->objfile_obstack,
3409 sizeof (struct dwarf2_per_cu_data));
3410 memset (this_cu, 0, sizeof (*this_cu));
3411 this_cu->offset = offset;
3412 this_cu->length = length + initial_length_size;
3413 this_cu->objfile = objfile;
3415 if (n_comp_units == n_allocated)
3418 all_comp_units = xrealloc (all_comp_units,
3420 * sizeof (struct dwarf2_per_cu_data *));
3422 all_comp_units[n_comp_units++] = this_cu;
3424 info_ptr = info_ptr + this_cu->length;
3427 dwarf2_per_objfile->all_comp_units
3428 = obstack_alloc (&objfile->objfile_obstack,
3429 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
3430 memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
3431 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
3432 xfree (all_comp_units);
3433 dwarf2_per_objfile->n_comp_units = n_comp_units;
3436 /* Process all loaded DIEs for compilation unit CU, starting at
3437 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
3438 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
3439 DW_AT_ranges). If NEED_PC is set, then this function will set
3440 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
3441 and record the covered ranges in the addrmap. */
3444 scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
3445 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
3447 struct partial_die_info *pdi;
3449 /* Now, march along the PDI's, descending into ones which have
3450 interesting children but skipping the children of the other ones,
3451 until we reach the end of the compilation unit. */
3457 fixup_partial_die (pdi, cu);
3459 /* Anonymous namespaces or modules have no name but have interesting
3460 children, so we need to look at them. Ditto for anonymous
3463 if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
3464 || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type)
3468 case DW_TAG_subprogram:
3469 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
3471 case DW_TAG_variable:
3472 case DW_TAG_typedef:
3473 case DW_TAG_union_type:
3474 if (!pdi->is_declaration)
3476 add_partial_symbol (pdi, cu);
3479 case DW_TAG_class_type:
3480 case DW_TAG_interface_type:
3481 case DW_TAG_structure_type:
3482 if (!pdi->is_declaration)
3484 add_partial_symbol (pdi, cu);
3487 case DW_TAG_enumeration_type:
3488 if (!pdi->is_declaration)
3489 add_partial_enumeration (pdi, cu);
3491 case DW_TAG_base_type:
3492 case DW_TAG_subrange_type:
3493 /* File scope base type definitions are added to the partial
3495 add_partial_symbol (pdi, cu);
3497 case DW_TAG_namespace:
3498 add_partial_namespace (pdi, lowpc, highpc, need_pc, cu);
3501 add_partial_module (pdi, lowpc, highpc, need_pc, cu);
3508 /* If the die has a sibling, skip to the sibling. */
3510 pdi = pdi->die_sibling;
3514 /* Functions used to compute the fully scoped name of a partial DIE.
3516 Normally, this is simple. For C++, the parent DIE's fully scoped
3517 name is concatenated with "::" and the partial DIE's name. For
3518 Java, the same thing occurs except that "." is used instead of "::".
3519 Enumerators are an exception; they use the scope of their parent
3520 enumeration type, i.e. the name of the enumeration type is not
3521 prepended to the enumerator.
3523 There are two complexities. One is DW_AT_specification; in this
3524 case "parent" means the parent of the target of the specification,
3525 instead of the direct parent of the DIE. The other is compilers
3526 which do not emit DW_TAG_namespace; in this case we try to guess
3527 the fully qualified name of structure types from their members'
3528 linkage names. This must be done using the DIE's children rather
3529 than the children of any DW_AT_specification target. We only need
3530 to do this for structures at the top level, i.e. if the target of
3531 any DW_AT_specification (if any; otherwise the DIE itself) does not
3534 /* Compute the scope prefix associated with PDI's parent, in
3535 compilation unit CU. The result will be allocated on CU's
3536 comp_unit_obstack, or a copy of the already allocated PDI->NAME
3537 field. NULL is returned if no prefix is necessary. */
3539 partial_die_parent_scope (struct partial_die_info *pdi,
3540 struct dwarf2_cu *cu)
3542 char *grandparent_scope;
3543 struct partial_die_info *parent, *real_pdi;
3545 /* We need to look at our parent DIE; if we have a DW_AT_specification,
3546 then this means the parent of the specification DIE. */
3549 while (real_pdi->has_specification)
3550 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
3552 parent = real_pdi->die_parent;
3556 if (parent->scope_set)
3557 return parent->scope;
3559 fixup_partial_die (parent, cu);
3561 grandparent_scope = partial_die_parent_scope (parent, cu);
3563 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
3564 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
3565 Work around this problem here. */
3566 if (cu->language == language_cplus
3567 && parent->tag == DW_TAG_namespace
3568 && strcmp (parent->name, "::") == 0
3569 && grandparent_scope == NULL)
3571 parent->scope = NULL;
3572 parent->scope_set = 1;
3576 if (parent->tag == DW_TAG_namespace
3577 || parent->tag == DW_TAG_module
3578 || parent->tag == DW_TAG_structure_type
3579 || parent->tag == DW_TAG_class_type
3580 || parent->tag == DW_TAG_interface_type
3581 || parent->tag == DW_TAG_union_type
3582 || parent->tag == DW_TAG_enumeration_type)
3584 if (grandparent_scope == NULL)
3585 parent->scope = parent->name;
3587 parent->scope = typename_concat (&cu->comp_unit_obstack, grandparent_scope,
3588 parent->name, 0, cu);
3590 else if (parent->tag == DW_TAG_enumerator)
3591 /* Enumerators should not get the name of the enumeration as a prefix. */
3592 parent->scope = grandparent_scope;
3595 /* FIXME drow/2004-04-01: What should we be doing with
3596 function-local names? For partial symbols, we should probably be
3598 complaint (&symfile_complaints,
3599 _("unhandled containing DIE tag %d for DIE at %d"),
3600 parent->tag, pdi->offset);
3601 parent->scope = grandparent_scope;
3604 parent->scope_set = 1;
3605 return parent->scope;
3608 /* Return the fully scoped name associated with PDI, from compilation unit
3609 CU. The result will be allocated with malloc. */
3611 partial_die_full_name (struct partial_die_info *pdi,
3612 struct dwarf2_cu *cu)
3616 /* If this is a template instantiation, we can not work out the
3617 template arguments from partial DIEs. So, unfortunately, we have
3618 to go through the full DIEs. At least any work we do building
3619 types here will be reused if full symbols are loaded later. */
3620 if (pdi->has_template_arguments)
3622 fixup_partial_die (pdi, cu);
3624 if (pdi->name != NULL && strchr (pdi->name, '<') == NULL)
3626 struct die_info *die;
3627 struct attribute attr;
3628 struct dwarf2_cu *ref_cu = cu;
3631 attr.form = DW_FORM_ref_addr;
3632 attr.u.addr = pdi->offset;
3633 die = follow_die_ref (NULL, &attr, &ref_cu);
3635 return xstrdup (dwarf2_full_name (NULL, die, ref_cu));
3639 parent_scope = partial_die_parent_scope (pdi, cu);
3640 if (parent_scope == NULL)
3643 return typename_concat (NULL, parent_scope, pdi->name, 0, cu);
3647 add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
3649 struct objfile *objfile = cu->objfile;
3651 char *actual_name = NULL;
3652 const struct partial_symbol *psym = NULL;
3654 int built_actual_name = 0;
3656 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3658 actual_name = partial_die_full_name (pdi, cu);
3660 built_actual_name = 1;
3662 if (actual_name == NULL)
3663 actual_name = pdi->name;
3667 case DW_TAG_subprogram:
3668 if (pdi->is_external || cu->language == language_ada)
3670 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
3671 of the global scope. But in Ada, we want to be able to access
3672 nested procedures globally. So all Ada subprograms are stored
3673 in the global scope. */
3674 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3675 mst_text, objfile); */
3676 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
3678 VAR_DOMAIN, LOC_BLOCK,
3679 &objfile->global_psymbols,
3680 0, pdi->lowpc + baseaddr,
3681 cu->language, objfile);
3685 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3686 mst_file_text, objfile); */
3687 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
3689 VAR_DOMAIN, LOC_BLOCK,
3690 &objfile->static_psymbols,
3691 0, pdi->lowpc + baseaddr,
3692 cu->language, objfile);
3695 case DW_TAG_variable:
3697 addr = decode_locdesc (pdi->locdesc, cu);
3701 && !dwarf2_per_objfile->has_section_at_zero)
3703 /* A global or static variable may also have been stripped
3704 out by the linker if unused, in which case its address
3705 will be nullified; do not add such variables into partial
3706 symbol table then. */
3708 else if (pdi->is_external)
3711 Don't enter into the minimal symbol tables as there is
3712 a minimal symbol table entry from the ELF symbols already.
3713 Enter into partial symbol table if it has a location
3714 descriptor or a type.
3715 If the location descriptor is missing, new_symbol will create
3716 a LOC_UNRESOLVED symbol, the address of the variable will then
3717 be determined from the minimal symbol table whenever the variable
3719 The address for the partial symbol table entry is not
3720 used by GDB, but it comes in handy for debugging partial symbol
3723 if (pdi->locdesc || pdi->has_type)
3724 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
3726 VAR_DOMAIN, LOC_STATIC,
3727 &objfile->global_psymbols,
3729 cu->language, objfile);
3733 /* Static Variable. Skip symbols without location descriptors. */
3734 if (pdi->locdesc == NULL)
3736 if (built_actual_name)
3737 xfree (actual_name);
3740 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
3741 mst_file_data, objfile); */
3742 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
3744 VAR_DOMAIN, LOC_STATIC,
3745 &objfile->static_psymbols,
3747 cu->language, objfile);
3750 case DW_TAG_typedef:
3751 case DW_TAG_base_type:
3752 case DW_TAG_subrange_type:
3753 add_psymbol_to_list (actual_name, strlen (actual_name),
3755 VAR_DOMAIN, LOC_TYPEDEF,
3756 &objfile->static_psymbols,
3757 0, (CORE_ADDR) 0, cu->language, objfile);
3759 case DW_TAG_namespace:
3760 add_psymbol_to_list (actual_name, strlen (actual_name),
3762 VAR_DOMAIN, LOC_TYPEDEF,
3763 &objfile->global_psymbols,
3764 0, (CORE_ADDR) 0, cu->language, objfile);
3766 case DW_TAG_class_type:
3767 case DW_TAG_interface_type:
3768 case DW_TAG_structure_type:
3769 case DW_TAG_union_type:
3770 case DW_TAG_enumeration_type:
3771 /* Skip external references. The DWARF standard says in the section
3772 about "Structure, Union, and Class Type Entries": "An incomplete
3773 structure, union or class type is represented by a structure,
3774 union or class entry that does not have a byte size attribute
3775 and that has a DW_AT_declaration attribute." */
3776 if (!pdi->has_byte_size && pdi->is_declaration)
3778 if (built_actual_name)
3779 xfree (actual_name);
3783 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
3784 static vs. global. */
3785 add_psymbol_to_list (actual_name, strlen (actual_name),
3787 STRUCT_DOMAIN, LOC_TYPEDEF,
3788 (cu->language == language_cplus
3789 || cu->language == language_java)
3790 ? &objfile->global_psymbols
3791 : &objfile->static_psymbols,
3792 0, (CORE_ADDR) 0, cu->language, objfile);
3795 case DW_TAG_enumerator:
3796 add_psymbol_to_list (actual_name, strlen (actual_name),
3798 VAR_DOMAIN, LOC_CONST,
3799 (cu->language == language_cplus
3800 || cu->language == language_java)
3801 ? &objfile->global_psymbols
3802 : &objfile->static_psymbols,
3803 0, (CORE_ADDR) 0, cu->language, objfile);
3809 if (built_actual_name)
3810 xfree (actual_name);
3813 /* Read a partial die corresponding to a namespace; also, add a symbol
3814 corresponding to that namespace to the symbol table. NAMESPACE is
3815 the name of the enclosing namespace. */
3818 add_partial_namespace (struct partial_die_info *pdi,
3819 CORE_ADDR *lowpc, CORE_ADDR *highpc,
3820 int need_pc, struct dwarf2_cu *cu)
3822 /* Add a symbol for the namespace. */
3824 add_partial_symbol (pdi, cu);
3826 /* Now scan partial symbols in that namespace. */
3828 if (pdi->has_children)
3829 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
3832 /* Read a partial die corresponding to a Fortran module. */
3835 add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
3836 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
3838 /* Now scan partial symbols in that module. */
3840 if (pdi->has_children)
3841 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
3844 /* Read a partial die corresponding to a subprogram and create a partial
3845 symbol for that subprogram. When the CU language allows it, this
3846 routine also defines a partial symbol for each nested subprogram
3847 that this subprogram contains.
3849 DIE my also be a lexical block, in which case we simply search
3850 recursively for suprograms defined inside that lexical block.
3851 Again, this is only performed when the CU language allows this
3852 type of definitions. */
3855 add_partial_subprogram (struct partial_die_info *pdi,
3856 CORE_ADDR *lowpc, CORE_ADDR *highpc,
3857 int need_pc, struct dwarf2_cu *cu)
3859 if (pdi->tag == DW_TAG_subprogram)
3861 if (pdi->has_pc_info)
3863 if (pdi->lowpc < *lowpc)
3864 *lowpc = pdi->lowpc;
3865 if (pdi->highpc > *highpc)
3866 *highpc = pdi->highpc;
3870 struct objfile *objfile = cu->objfile;
3872 baseaddr = ANOFFSET (objfile->section_offsets,
3873 SECT_OFF_TEXT (objfile));
3874 addrmap_set_empty (objfile->psymtabs_addrmap,
3875 pdi->lowpc + baseaddr,
3876 pdi->highpc - 1 + baseaddr,
3877 cu->per_cu->v.psymtab);
3879 if (!pdi->is_declaration)
3880 /* Ignore subprogram DIEs that do not have a name, they are
3881 illegal. Do not emit a complaint at this point, we will
3882 do so when we convert this psymtab into a symtab. */
3884 add_partial_symbol (pdi, cu);
3888 if (! pdi->has_children)
3891 if (cu->language == language_ada)
3893 pdi = pdi->die_child;
3896 fixup_partial_die (pdi, cu);
3897 if (pdi->tag == DW_TAG_subprogram
3898 || pdi->tag == DW_TAG_lexical_block)
3899 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
3900 pdi = pdi->die_sibling;
3905 /* See if we can figure out if the class lives in a namespace. We do
3906 this by looking for a member function; its demangled name will
3907 contain namespace info, if there is any. */
3910 guess_structure_name (struct partial_die_info *struct_pdi,
3911 struct dwarf2_cu *cu)
3913 if ((cu->language == language_cplus
3914 || cu->language == language_java)
3915 && cu->has_namespace_info == 0
3916 && struct_pdi->has_children)
3918 /* NOTE: carlton/2003-10-07: Getting the info this way changes
3919 what template types look like, because the demangler
3920 frequently doesn't give the same name as the debug info. We
3921 could fix this by only using the demangled name to get the
3922 prefix (but see comment in read_structure_type). */
3924 struct partial_die_info *real_pdi;
3926 /* If this DIE (this DIE's specification, if any) has a parent, then
3927 we should not do this. We'll prepend the parent's fully qualified
3928 name when we create the partial symbol. */
3930 real_pdi = struct_pdi;
3931 while (real_pdi->has_specification)
3932 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
3934 if (real_pdi->die_parent != NULL)
3939 /* Read a partial die corresponding to an enumeration type. */
3942 add_partial_enumeration (struct partial_die_info *enum_pdi,
3943 struct dwarf2_cu *cu)
3945 struct partial_die_info *pdi;
3947 if (enum_pdi->name != NULL)
3948 add_partial_symbol (enum_pdi, cu);
3950 pdi = enum_pdi->die_child;
3953 if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
3954 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
3956 add_partial_symbol (pdi, cu);
3957 pdi = pdi->die_sibling;
3961 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
3962 Return the corresponding abbrev, or NULL if the number is zero (indicating
3963 an empty DIE). In either case *BYTES_READ will be set to the length of
3964 the initial number. */
3966 static struct abbrev_info *
3967 peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
3968 struct dwarf2_cu *cu)
3970 bfd *abfd = cu->objfile->obfd;
3971 unsigned int abbrev_number;
3972 struct abbrev_info *abbrev;
3974 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
3976 if (abbrev_number == 0)
3979 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
3982 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number,
3983 bfd_get_filename (abfd));
3989 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
3990 Returns a pointer to the end of a series of DIEs, terminated by an empty
3991 DIE. Any children of the skipped DIEs will also be skipped. */
3994 skip_children (gdb_byte *buffer, gdb_byte *info_ptr, struct dwarf2_cu *cu)
3996 struct abbrev_info *abbrev;
3997 unsigned int bytes_read;
4001 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
4003 return info_ptr + bytes_read;
4005 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
4009 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4010 INFO_PTR should point just after the initial uleb128 of a DIE, and the
4011 abbrev corresponding to that skipped uleb128 should be passed in
4012 ABBREV. Returns a pointer to this DIE's sibling, skipping any
4016 skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
4017 struct abbrev_info *abbrev, struct dwarf2_cu *cu)
4019 unsigned int bytes_read;
4020 struct attribute attr;
4021 bfd *abfd = cu->objfile->obfd;
4022 unsigned int form, i;
4024 for (i = 0; i < abbrev->num_attrs; i++)
4026 /* The only abbrev we care about is DW_AT_sibling. */
4027 if (abbrev->attrs[i].name == DW_AT_sibling)
4029 read_attribute (&attr, &abbrev->attrs[i],
4030 abfd, info_ptr, cu);
4031 if (attr.form == DW_FORM_ref_addr)
4032 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
4034 return buffer + dwarf2_get_ref_die_offset (&attr);
4037 /* If it isn't DW_AT_sibling, skip this attribute. */
4038 form = abbrev->attrs[i].form;
4042 case DW_FORM_ref_addr:
4043 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
4044 and later it is offset sized. */
4045 if (cu->header.version == 2)
4046 info_ptr += cu->header.addr_size;
4048 info_ptr += cu->header.offset_size;
4051 info_ptr += cu->header.addr_size;
4058 case DW_FORM_flag_present:
4073 case DW_FORM_string:
4074 read_direct_string (abfd, info_ptr, &bytes_read);
4075 info_ptr += bytes_read;
4077 case DW_FORM_sec_offset:
4079 info_ptr += cu->header.offset_size;
4081 case DW_FORM_exprloc:
4083 info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
4084 info_ptr += bytes_read;
4086 case DW_FORM_block1:
4087 info_ptr += 1 + read_1_byte (abfd, info_ptr);
4089 case DW_FORM_block2:
4090 info_ptr += 2 + read_2_bytes (abfd, info_ptr);
4092 case DW_FORM_block4:
4093 info_ptr += 4 + read_4_bytes (abfd, info_ptr);
4097 case DW_FORM_ref_udata:
4098 info_ptr = skip_leb128 (abfd, info_ptr);
4100 case DW_FORM_indirect:
4101 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
4102 info_ptr += bytes_read;
4103 /* We need to continue parsing from here, so just go back to
4105 goto skip_attribute;
4108 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
4109 dwarf_form_name (form),
4110 bfd_get_filename (abfd));
4114 if (abbrev->has_children)
4115 return skip_children (buffer, info_ptr, cu);
4120 /* Locate ORIG_PDI's sibling.
4121 INFO_PTR should point to the start of the next DIE after ORIG_PDI
4125 locate_pdi_sibling (struct partial_die_info *orig_pdi,
4126 gdb_byte *buffer, gdb_byte *info_ptr,
4127 bfd *abfd, struct dwarf2_cu *cu)
4129 /* Do we know the sibling already? */
4131 if (orig_pdi->sibling)
4132 return orig_pdi->sibling;
4134 /* Are there any children to deal with? */
4136 if (!orig_pdi->has_children)
4139 /* Skip the children the long way. */
4141 return skip_children (buffer, info_ptr, cu);
4144 /* Expand this partial symbol table into a full symbol table. */
4147 dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
4153 warning (_("bug: psymtab for %s is already read in."), pst->filename);
4159 printf_filtered (_("Reading in symbols for %s..."), pst->filename);
4160 gdb_flush (gdb_stdout);
4163 /* Restore our global data. */
4164 dwarf2_per_objfile = objfile_data (pst->objfile,
4165 dwarf2_objfile_data_key);
4167 /* If this psymtab is constructed from a debug-only objfile, the
4168 has_section_at_zero flag will not necessarily be correct. We
4169 can get the correct value for this flag by looking at the data
4170 associated with the (presumably stripped) associated objfile. */
4171 if (pst->objfile->separate_debug_objfile_backlink)
4173 struct dwarf2_per_objfile *dpo_backlink
4174 = objfile_data (pst->objfile->separate_debug_objfile_backlink,
4175 dwarf2_objfile_data_key);
4177 dwarf2_per_objfile->has_section_at_zero
4178 = dpo_backlink->has_section_at_zero;
4181 dwarf2_per_objfile->reading_partial_symbols = 0;
4183 psymtab_to_symtab_1 (pst);
4185 /* Finish up the debug error message. */
4187 printf_filtered (_("done.\n"));
4192 /* Add PER_CU to the queue. */
4195 queue_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
4197 struct dwarf2_queue_item *item;
4200 item = xmalloc (sizeof (*item));
4201 item->per_cu = per_cu;
4204 if (dwarf2_queue == NULL)
4205 dwarf2_queue = item;
4207 dwarf2_queue_tail->next = item;
4209 dwarf2_queue_tail = item;
4212 /* Process the queue. */
4215 process_queue (struct objfile *objfile)
4217 struct dwarf2_queue_item *item, *next_item;
4219 /* The queue starts out with one item, but following a DIE reference
4220 may load a new CU, adding it to the end of the queue. */
4221 for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
4223 if (dwarf2_per_objfile->using_index
4224 ? !item->per_cu->v.quick->symtab
4225 : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin))
4226 process_full_comp_unit (item->per_cu);
4228 item->per_cu->queued = 0;
4229 next_item = item->next;
4233 dwarf2_queue_tail = NULL;
4236 /* Free all allocated queue entries. This function only releases anything if
4237 an error was thrown; if the queue was processed then it would have been
4238 freed as we went along. */
4241 dwarf2_release_queue (void *dummy)
4243 struct dwarf2_queue_item *item, *last;
4245 item = dwarf2_queue;
4248 /* Anything still marked queued is likely to be in an
4249 inconsistent state, so discard it. */
4250 if (item->per_cu->queued)
4252 if (item->per_cu->cu != NULL)
4253 free_one_cached_comp_unit (item->per_cu->cu);
4254 item->per_cu->queued = 0;
4262 dwarf2_queue = dwarf2_queue_tail = NULL;
4265 /* Read in full symbols for PST, and anything it depends on. */
4268 psymtab_to_symtab_1 (struct partial_symtab *pst)
4270 struct dwarf2_per_cu_data *per_cu;
4271 struct cleanup *back_to;
4274 for (i = 0; i < pst->number_of_dependencies; i++)
4275 if (!pst->dependencies[i]->readin)
4277 /* Inform about additional files that need to be read in. */
4280 /* FIXME: i18n: Need to make this a single string. */
4281 fputs_filtered (" ", gdb_stdout);
4283 fputs_filtered ("and ", gdb_stdout);
4285 printf_filtered ("%s...", pst->dependencies[i]->filename);
4286 wrap_here (""); /* Flush output */
4287 gdb_flush (gdb_stdout);
4289 psymtab_to_symtab_1 (pst->dependencies[i]);
4292 per_cu = pst->read_symtab_private;
4296 /* It's an include file, no symbols to read for it.
4297 Everything is in the parent symtab. */
4302 dw2_do_instantiate_symtab (pst->objfile, per_cu);
4305 /* Load the DIEs associated with PER_CU into memory. */
4308 load_full_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
4310 bfd *abfd = objfile->obfd;
4311 struct dwarf2_cu *cu;
4312 unsigned int offset;
4313 gdb_byte *info_ptr, *beg_of_comp_unit;
4314 struct cleanup *free_abbrevs_cleanup = NULL, *free_cu_cleanup = NULL;
4315 struct attribute *attr;
4318 gdb_assert (! per_cu->from_debug_types);
4320 /* Set local variables from the partial symbol table info. */
4321 offset = per_cu->offset;
4323 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
4324 info_ptr = dwarf2_per_objfile->info.buffer + offset;
4325 beg_of_comp_unit = info_ptr;
4327 if (per_cu->cu == NULL)
4329 cu = alloc_one_comp_unit (objfile);
4333 /* If an error occurs while loading, release our storage. */
4334 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
4336 /* Read in the comp_unit header. */
4337 info_ptr = read_comp_unit_head (&cu->header, info_ptr, abfd);
4339 /* Complete the cu_header. */
4340 cu->header.offset = offset;
4341 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
4343 /* Read the abbrevs for this compilation unit. */
4344 dwarf2_read_abbrevs (abfd, cu);
4345 free_abbrevs_cleanup = make_cleanup (dwarf2_free_abbrev_table, cu);
4347 /* Link this compilation unit into the compilation unit tree. */
4349 cu->per_cu = per_cu;
4351 /* Link this CU into read_in_chain. */
4352 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
4353 dwarf2_per_objfile->read_in_chain = per_cu;
4358 info_ptr += cu->header.first_die_offset;
4361 cu->dies = read_comp_unit (info_ptr, cu);
4363 /* We try not to read any attributes in this function, because not
4364 all objfiles needed for references have been loaded yet, and symbol
4365 table processing isn't initialized. But we have to set the CU language,
4366 or we won't be able to build types correctly. */
4367 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
4369 set_cu_language (DW_UNSND (attr), cu);
4371 set_cu_language (language_minimal, cu);
4373 /* Similarly, if we do not read the producer, we can not apply
4374 producer-specific interpretation. */
4375 attr = dwarf2_attr (cu->dies, DW_AT_producer, cu);
4377 cu->producer = DW_STRING (attr);
4381 do_cleanups (free_abbrevs_cleanup);
4383 /* We've successfully allocated this compilation unit. Let our
4384 caller clean it up when finished with it. */
4385 discard_cleanups (free_cu_cleanup);
4389 /* Add a DIE to the delayed physname list. */
4392 add_to_method_list (struct type *type, int fnfield_index, int index,
4393 const char *name, struct die_info *die,
4394 struct dwarf2_cu *cu)
4396 struct delayed_method_info mi;
4398 mi.fnfield_index = fnfield_index;
4402 VEC_safe_push (delayed_method_info, cu->method_list, &mi);
4405 /* A cleanup for freeing the delayed method list. */
4408 free_delayed_list (void *ptr)
4410 struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr;
4411 if (cu->method_list != NULL)
4413 VEC_free (delayed_method_info, cu->method_list);
4414 cu->method_list = NULL;
4418 /* Compute the physnames of any methods on the CU's method list.
4420 The computation of method physnames is delayed in order to avoid the
4421 (bad) condition that one of the method's formal parameters is of an as yet
4425 compute_delayed_physnames (struct dwarf2_cu *cu)
4428 struct delayed_method_info *mi;
4429 for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i)
4432 struct fn_fieldlist *fn_flp
4433 = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index);
4434 physname = (char *) dwarf2_physname ((char *) mi->name, mi->die, cu);
4435 fn_flp->fn_fields[mi->index].physname = physname ? physname : "";
4439 /* Generate full symbol information for PST and CU, whose DIEs have
4440 already been loaded into memory. */
4443 process_full_comp_unit (struct dwarf2_per_cu_data *per_cu)
4445 struct dwarf2_cu *cu = per_cu->cu;
4446 struct objfile *objfile = per_cu->objfile;
4447 CORE_ADDR lowpc, highpc;
4448 struct symtab *symtab;
4449 struct cleanup *back_to, *delayed_list_cleanup;
4452 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
4455 back_to = make_cleanup (really_free_pendings, NULL);
4456 delayed_list_cleanup = make_cleanup (free_delayed_list, cu);
4458 cu->list_in_scope = &file_symbols;
4460 dwarf2_find_base_address (cu->dies, cu);
4462 /* Do line number decoding in read_file_scope () */
4463 process_die (cu->dies, cu);
4465 /* Now that we have processed all the DIEs in the CU, all the types
4466 should be complete, and it should now be safe to compute all of the
4468 compute_delayed_physnames (cu);
4469 do_cleanups (delayed_list_cleanup);
4471 /* Some compilers don't define a DW_AT_high_pc attribute for the
4472 compilation unit. If the DW_AT_high_pc is missing, synthesize
4473 it, by scanning the DIE's below the compilation unit. */
4474 get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
4476 symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
4478 /* Set symtab language to language from DW_AT_language.
4479 If the compilation is from a C file generated by language preprocessors,
4480 do not set the language if it was already deduced by start_subfile. */
4482 && !(cu->language == language_c && symtab->language != language_c))
4484 symtab->language = cu->language;
4487 if (dwarf2_per_objfile->using_index)
4488 per_cu->v.quick->symtab = symtab;
4491 struct partial_symtab *pst = per_cu->v.psymtab;
4492 pst->symtab = symtab;
4496 do_cleanups (back_to);
4499 /* Process a die and its children. */
4502 process_die (struct die_info *die, struct dwarf2_cu *cu)
4506 case DW_TAG_padding:
4508 case DW_TAG_compile_unit:
4509 read_file_scope (die, cu);
4511 case DW_TAG_type_unit:
4512 read_type_unit_scope (die, cu);
4514 case DW_TAG_subprogram:
4515 case DW_TAG_inlined_subroutine:
4516 read_func_scope (die, cu);
4518 case DW_TAG_lexical_block:
4519 case DW_TAG_try_block:
4520 case DW_TAG_catch_block:
4521 read_lexical_block_scope (die, cu);
4523 case DW_TAG_class_type:
4524 case DW_TAG_interface_type:
4525 case DW_TAG_structure_type:
4526 case DW_TAG_union_type:
4527 process_structure_scope (die, cu);
4529 case DW_TAG_enumeration_type:
4530 process_enumeration_scope (die, cu);
4533 /* These dies have a type, but processing them does not create
4534 a symbol or recurse to process the children. Therefore we can
4535 read them on-demand through read_type_die. */
4536 case DW_TAG_subroutine_type:
4537 case DW_TAG_set_type:
4538 case DW_TAG_array_type:
4539 case DW_TAG_pointer_type:
4540 case DW_TAG_ptr_to_member_type:
4541 case DW_TAG_reference_type:
4542 case DW_TAG_string_type:
4545 case DW_TAG_base_type:
4546 case DW_TAG_subrange_type:
4547 case DW_TAG_typedef:
4548 /* Add a typedef symbol for the type definition, if it has a
4550 new_symbol (die, read_type_die (die, cu), cu);
4552 case DW_TAG_common_block:
4553 read_common_block (die, cu);
4555 case DW_TAG_common_inclusion:
4557 case DW_TAG_namespace:
4558 processing_has_namespace_info = 1;
4559 read_namespace (die, cu);
4562 processing_has_namespace_info = 1;
4563 read_module (die, cu);
4565 case DW_TAG_imported_declaration:
4566 case DW_TAG_imported_module:
4567 processing_has_namespace_info = 1;
4568 if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
4569 || cu->language != language_fortran))
4570 complaint (&symfile_complaints, _("Tag '%s' has unexpected children"),
4571 dwarf_tag_name (die->tag));
4572 read_import_statement (die, cu);
4575 new_symbol (die, NULL, cu);
4580 /* A helper function for dwarf2_compute_name which determines whether DIE
4581 needs to have the name of the scope prepended to the name listed in the
4585 die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu)
4587 struct attribute *attr;
4591 case DW_TAG_namespace:
4592 case DW_TAG_typedef:
4593 case DW_TAG_class_type:
4594 case DW_TAG_interface_type:
4595 case DW_TAG_structure_type:
4596 case DW_TAG_union_type:
4597 case DW_TAG_enumeration_type:
4598 case DW_TAG_enumerator:
4599 case DW_TAG_subprogram:
4603 case DW_TAG_variable:
4604 /* We only need to prefix "globally" visible variables. These include
4605 any variable marked with DW_AT_external or any variable that
4606 lives in a namespace. [Variables in anonymous namespaces
4607 require prefixing, but they are not DW_AT_external.] */
4609 if (dwarf2_attr (die, DW_AT_specification, cu))
4611 struct dwarf2_cu *spec_cu = cu;
4613 return die_needs_namespace (die_specification (die, &spec_cu),
4617 attr = dwarf2_attr (die, DW_AT_external, cu);
4618 if (attr == NULL && die->parent->tag != DW_TAG_namespace
4619 && die->parent->tag != DW_TAG_module)
4621 /* A variable in a lexical block of some kind does not need a
4622 namespace, even though in C++ such variables may be external
4623 and have a mangled name. */
4624 if (die->parent->tag == DW_TAG_lexical_block
4625 || die->parent->tag == DW_TAG_try_block
4626 || die->parent->tag == DW_TAG_catch_block
4627 || die->parent->tag == DW_TAG_subprogram)
4636 /* Retrieve the last character from a mem_file. */
4639 do_ui_file_peek_last (void *object, const char *buffer, long length)
4641 char *last_char_p = (char *) object;
4644 *last_char_p = buffer[length - 1];
4647 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
4648 compute the physname for the object, which include a method's
4649 formal parameters (C++/Java) and return type (Java).
4651 For Ada, return the DIE's linkage name rather than the fully qualified
4652 name. PHYSNAME is ignored..
4654 The result is allocated on the objfile_obstack and canonicalized. */
4657 dwarf2_compute_name (char *name, struct die_info *die, struct dwarf2_cu *cu,
4661 name = dwarf2_name (die, cu);
4663 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
4664 compute it by typename_concat inside GDB. */
4665 if (cu->language == language_ada
4666 || (cu->language == language_fortran && physname))
4668 /* For Ada unit, we prefer the linkage name over the name, as
4669 the former contains the exported name, which the user expects
4670 to be able to reference. Ideally, we want the user to be able
4671 to reference this entity using either natural or linkage name,
4672 but we haven't started looking at this enhancement yet. */
4673 struct attribute *attr;
4675 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
4677 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
4678 if (attr && DW_STRING (attr))
4679 return DW_STRING (attr);
4682 /* These are the only languages we know how to qualify names in. */
4684 && (cu->language == language_cplus || cu->language == language_java
4685 || cu->language == language_fortran))
4687 if (die_needs_namespace (die, cu))
4691 struct ui_file *buf;
4693 prefix = determine_prefix (die, cu);
4694 buf = mem_fileopen ();
4695 if (*prefix != '\0')
4697 char *prefixed_name = typename_concat (NULL, prefix, name,
4700 fputs_unfiltered (prefixed_name, buf);
4701 xfree (prefixed_name);
4704 fputs_unfiltered (name ? name : "", buf);
4706 /* Template parameters may be specified in the DIE's DW_AT_name, or
4707 as children with DW_TAG_template_type_param or
4708 DW_TAG_value_type_param. If the latter, add them to the name
4709 here. If the name already has template parameters, then
4710 skip this step; some versions of GCC emit both, and
4711 it is more efficient to use the pre-computed name.
4713 Something to keep in mind about this process: it is very
4714 unlikely, or in some cases downright impossible, to produce
4715 something that will match the mangled name of a function.
4716 If the definition of the function has the same debug info,
4717 we should be able to match up with it anyway. But fallbacks
4718 using the minimal symbol, for instance to find a method
4719 implemented in a stripped copy of libstdc++, will not work.
4720 If we do not have debug info for the definition, we will have to
4721 match them up some other way.
4723 When we do name matching there is a related problem with function
4724 templates; two instantiated function templates are allowed to
4725 differ only by their return types, which we do not add here. */
4727 if (cu->language == language_cplus && strchr (name, '<') == NULL)
4729 struct attribute *attr;
4730 struct die_info *child;
4733 die->building_fullname = 1;
4735 for (child = die->child; child != NULL; child = child->sibling)
4740 struct dwarf2_locexpr_baton *baton;
4743 if (child->tag != DW_TAG_template_type_param
4744 && child->tag != DW_TAG_template_value_param)
4749 fputs_unfiltered ("<", buf);
4753 fputs_unfiltered (", ", buf);
4755 attr = dwarf2_attr (child, DW_AT_type, cu);
4758 complaint (&symfile_complaints,
4759 _("template parameter missing DW_AT_type"));
4760 fputs_unfiltered ("UNKNOWN_TYPE", buf);
4763 type = die_type (child, cu);
4765 if (child->tag == DW_TAG_template_type_param)
4767 c_print_type (type, "", buf, -1, 0);
4771 attr = dwarf2_attr (child, DW_AT_const_value, cu);
4774 complaint (&symfile_complaints,
4775 _("template parameter missing DW_AT_const_value"));
4776 fputs_unfiltered ("UNKNOWN_VALUE", buf);
4780 dwarf2_const_value_attr (attr, type, name,
4781 &cu->comp_unit_obstack, cu,
4782 &value, &bytes, &baton);
4784 if (TYPE_NOSIGN (type))
4785 /* GDB prints characters as NUMBER 'CHAR'. If that's
4786 changed, this can use value_print instead. */
4787 c_printchar (value, type, buf);
4790 struct value_print_options opts;
4793 v = dwarf2_evaluate_loc_desc (type, NULL,
4797 else if (bytes != NULL)
4799 v = allocate_value (type);
4800 memcpy (value_contents_writeable (v), bytes,
4801 TYPE_LENGTH (type));
4804 v = value_from_longest (type, value);
4806 /* Specify decimal so that we do not depend on the radix. */
4807 get_formatted_print_options (&opts, 'd');
4809 value_print (v, buf, &opts);
4815 die->building_fullname = 0;
4819 /* Close the argument list, with a space if necessary
4820 (nested templates). */
4821 char last_char = '\0';
4822 ui_file_put (buf, do_ui_file_peek_last, &last_char);
4823 if (last_char == '>')
4824 fputs_unfiltered (" >", buf);
4826 fputs_unfiltered (">", buf);
4830 /* For Java and C++ methods, append formal parameter type
4831 information, if PHYSNAME. */
4833 if (physname && die->tag == DW_TAG_subprogram
4834 && (cu->language == language_cplus
4835 || cu->language == language_java))
4837 struct type *type = read_type_die (die, cu);
4839 c_type_print_args (type, buf, 0, cu->language);
4841 if (cu->language == language_java)
4843 /* For java, we must append the return type to method
4845 if (die->tag == DW_TAG_subprogram)
4846 java_print_type (TYPE_TARGET_TYPE (type), "", buf,
4849 else if (cu->language == language_cplus)
4851 if (TYPE_NFIELDS (type) > 0
4852 && TYPE_FIELD_ARTIFICIAL (type, 0)
4853 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 0))))
4854 fputs_unfiltered (" const", buf);
4858 name = ui_file_obsavestring (buf, &cu->objfile->objfile_obstack,
4860 ui_file_delete (buf);
4862 if (cu->language == language_cplus)
4865 = dwarf2_canonicalize_name (name, cu,
4866 &cu->objfile->objfile_obstack);
4877 /* Return the fully qualified name of DIE, based on its DW_AT_name.
4878 If scope qualifiers are appropriate they will be added. The result
4879 will be allocated on the objfile_obstack, or NULL if the DIE does
4880 not have a name. NAME may either be from a previous call to
4881 dwarf2_name or NULL.
4883 The output string will be canonicalized (if C++/Java). */
4886 dwarf2_full_name (char *name, struct die_info *die, struct dwarf2_cu *cu)
4888 return dwarf2_compute_name (name, die, cu, 0);
4891 /* Construct a physname for the given DIE in CU. NAME may either be
4892 from a previous call to dwarf2_name or NULL. The result will be
4893 allocated on the objfile_objstack or NULL if the DIE does not have a
4896 The output string will be canonicalized (if C++/Java). */
4899 dwarf2_physname (char *name, struct die_info *die, struct dwarf2_cu *cu)
4901 return dwarf2_compute_name (name, die, cu, 1);
4904 /* Read the import statement specified by the given die and record it. */
4907 read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
4909 struct attribute *import_attr;
4910 struct die_info *imported_die;
4911 struct dwarf2_cu *imported_cu;
4912 const char *imported_name;
4913 const char *imported_name_prefix;
4914 const char *canonical_name;
4915 const char *import_alias;
4916 const char *imported_declaration = NULL;
4917 const char *import_prefix;
4921 import_attr = dwarf2_attr (die, DW_AT_import, cu);
4922 if (import_attr == NULL)
4924 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
4925 dwarf_tag_name (die->tag));
4930 imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu);
4931 imported_name = dwarf2_name (imported_die, imported_cu);
4932 if (imported_name == NULL)
4934 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
4936 The import in the following code:
4950 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
4951 <52> DW_AT_decl_file : 1
4952 <53> DW_AT_decl_line : 6
4953 <54> DW_AT_import : <0x75>
4954 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
4956 <5b> DW_AT_decl_file : 1
4957 <5c> DW_AT_decl_line : 2
4958 <5d> DW_AT_type : <0x6e>
4960 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
4961 <76> DW_AT_byte_size : 4
4962 <77> DW_AT_encoding : 5 (signed)
4964 imports the wrong die ( 0x75 instead of 0x58 ).
4965 This case will be ignored until the gcc bug is fixed. */
4969 /* Figure out the local name after import. */
4970 import_alias = dwarf2_name (die, cu);
4972 /* Figure out where the statement is being imported to. */
4973 import_prefix = determine_prefix (die, cu);
4975 /* Figure out what the scope of the imported die is and prepend it
4976 to the name of the imported die. */
4977 imported_name_prefix = determine_prefix (imported_die, imported_cu);
4979 if (imported_die->tag != DW_TAG_namespace
4980 && imported_die->tag != DW_TAG_module)
4982 imported_declaration = imported_name;
4983 canonical_name = imported_name_prefix;
4985 else if (strlen (imported_name_prefix) > 0)
4987 temp = alloca (strlen (imported_name_prefix)
4988 + 2 + strlen (imported_name) + 1);
4989 strcpy (temp, imported_name_prefix);
4990 strcat (temp, "::");
4991 strcat (temp, imported_name);
4992 canonical_name = temp;
4995 canonical_name = imported_name;
4997 cp_add_using_directive (import_prefix,
5000 imported_declaration,
5001 &cu->objfile->objfile_obstack);
5005 initialize_cu_func_list (struct dwarf2_cu *cu)
5007 cu->first_fn = cu->last_fn = cu->cached_fn = NULL;
5011 free_cu_line_header (void *arg)
5013 struct dwarf2_cu *cu = arg;
5015 free_line_header (cu->line_header);
5016 cu->line_header = NULL;
5020 find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu,
5021 char **name, char **comp_dir)
5023 struct attribute *attr;
5028 /* Find the filename. Do not use dwarf2_name here, since the filename
5029 is not a source language identifier. */
5030 attr = dwarf2_attr (die, DW_AT_name, cu);
5033 *name = DW_STRING (attr);
5036 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
5038 *comp_dir = DW_STRING (attr);
5039 else if (*name != NULL && IS_ABSOLUTE_PATH (*name))
5041 *comp_dir = ldirname (*name);
5042 if (*comp_dir != NULL)
5043 make_cleanup (xfree, *comp_dir);
5045 if (*comp_dir != NULL)
5047 /* Irix 6.2 native cc prepends <machine>.: to the compilation
5048 directory, get rid of it. */
5049 char *cp = strchr (*comp_dir, ':');
5051 if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/')
5056 *name = "<unknown>";
5060 read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
5062 struct objfile *objfile = cu->objfile;
5063 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
5064 CORE_ADDR lowpc = ((CORE_ADDR) -1);
5065 CORE_ADDR highpc = ((CORE_ADDR) 0);
5066 struct attribute *attr;
5068 char *comp_dir = NULL;
5069 struct die_info *child_die;
5070 bfd *abfd = objfile->obfd;
5071 struct line_header *line_header = 0;
5074 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5076 get_scope_pc_bounds (die, &lowpc, &highpc, cu);
5078 /* If we didn't find a lowpc, set it to highpc to avoid complaints
5079 from finish_block. */
5080 if (lowpc == ((CORE_ADDR) -1))
5085 find_file_and_directory (die, cu, &name, &comp_dir);
5087 attr = dwarf2_attr (die, DW_AT_language, cu);
5090 set_cu_language (DW_UNSND (attr), cu);
5093 attr = dwarf2_attr (die, DW_AT_producer, cu);
5095 cu->producer = DW_STRING (attr);
5097 /* We assume that we're processing GCC output. */
5098 processing_gcc_compilation = 2;
5100 processing_has_namespace_info = 0;
5102 start_symtab (name, comp_dir, lowpc);
5103 record_debugformat ("DWARF 2");
5104 record_producer (cu->producer);
5106 initialize_cu_func_list (cu);
5108 /* Decode line number information if present. We do this before
5109 processing child DIEs, so that the line header table is available
5110 for DW_AT_decl_file. */
5111 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
5114 unsigned int line_offset = DW_UNSND (attr);
5115 line_header = dwarf_decode_line_header (line_offset, abfd, cu);
5118 cu->line_header = line_header;
5119 make_cleanup (free_cu_line_header, cu);
5120 dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL);
5124 /* Process all dies in compilation unit. */
5125 if (die->child != NULL)
5127 child_die = die->child;
5128 while (child_die && child_die->tag)
5130 process_die (child_die, cu);
5131 child_die = sibling_die (child_die);
5135 /* Decode macro information, if present. Dwarf 2 macro information
5136 refers to information in the line number info statement program
5137 header, so we can only read it if we've read the header
5139 attr = dwarf2_attr (die, DW_AT_macro_info, cu);
5140 if (attr && line_header)
5142 unsigned int macro_offset = DW_UNSND (attr);
5144 dwarf_decode_macros (line_header, macro_offset,
5145 comp_dir, abfd, cu);
5147 do_cleanups (back_to);
5150 /* For TUs we want to skip the first top level sibling if it's not the
5151 actual type being defined by this TU. In this case the first top
5152 level sibling is there to provide context only. */
5155 read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
5157 struct objfile *objfile = cu->objfile;
5158 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
5160 struct attribute *attr;
5162 char *comp_dir = NULL;
5163 struct die_info *child_die;
5164 bfd *abfd = objfile->obfd;
5166 /* start_symtab needs a low pc, but we don't really have one.
5167 Do what read_file_scope would do in the absence of such info. */
5168 lowpc = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5170 /* Find the filename. Do not use dwarf2_name here, since the filename
5171 is not a source language identifier. */
5172 attr = dwarf2_attr (die, DW_AT_name, cu);
5174 name = DW_STRING (attr);
5176 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
5178 comp_dir = DW_STRING (attr);
5179 else if (name != NULL && IS_ABSOLUTE_PATH (name))
5181 comp_dir = ldirname (name);
5182 if (comp_dir != NULL)
5183 make_cleanup (xfree, comp_dir);
5189 attr = dwarf2_attr (die, DW_AT_language, cu);
5191 set_cu_language (DW_UNSND (attr), cu);
5193 /* This isn't technically needed today. It is done for symmetry
5194 with read_file_scope. */
5195 attr = dwarf2_attr (die, DW_AT_producer, cu);
5197 cu->producer = DW_STRING (attr);
5199 /* We assume that we're processing GCC output. */
5200 processing_gcc_compilation = 2;
5202 processing_has_namespace_info = 0;
5204 start_symtab (name, comp_dir, lowpc);
5205 record_debugformat ("DWARF 2");
5206 record_producer (cu->producer);
5208 /* Process the dies in the type unit. */
5209 if (die->child == NULL)
5211 dump_die_for_error (die);
5212 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
5213 bfd_get_filename (abfd));
5216 child_die = die->child;
5218 while (child_die && child_die->tag)
5220 process_die (child_die, cu);
5222 child_die = sibling_die (child_die);
5225 do_cleanups (back_to);
5229 add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc,
5230 struct dwarf2_cu *cu)
5232 struct function_range *thisfn;
5234 thisfn = (struct function_range *)
5235 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range));
5236 thisfn->name = name;
5237 thisfn->lowpc = lowpc;
5238 thisfn->highpc = highpc;
5239 thisfn->seen_line = 0;
5240 thisfn->next = NULL;
5242 if (cu->last_fn == NULL)
5243 cu->first_fn = thisfn;
5245 cu->last_fn->next = thisfn;
5247 cu->last_fn = thisfn;
5250 /* qsort helper for inherit_abstract_dies. */
5253 unsigned_int_compar (const void *ap, const void *bp)
5255 unsigned int a = *(unsigned int *) ap;
5256 unsigned int b = *(unsigned int *) bp;
5258 return (a > b) - (b > a);
5261 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
5262 Inherit only the children of the DW_AT_abstract_origin DIE not being already
5263 referenced by DW_AT_abstract_origin from the children of the current DIE. */
5266 inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
5268 struct die_info *child_die;
5269 unsigned die_children_count;
5270 /* CU offsets which were referenced by children of the current DIE. */
5272 unsigned *offsets_end, *offsetp;
5273 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
5274 struct die_info *origin_die;
5275 /* Iterator of the ORIGIN_DIE children. */
5276 struct die_info *origin_child_die;
5277 struct cleanup *cleanups;
5278 struct attribute *attr;
5279 struct dwarf2_cu *origin_cu;
5280 struct pending **origin_previous_list_in_scope;
5282 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
5286 /* Note that following die references may follow to a die in a
5290 origin_die = follow_die_ref (die, attr, &origin_cu);
5292 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
5294 origin_previous_list_in_scope = origin_cu->list_in_scope;
5295 origin_cu->list_in_scope = cu->list_in_scope;
5297 if (die->tag != origin_die->tag
5298 && !(die->tag == DW_TAG_inlined_subroutine
5299 && origin_die->tag == DW_TAG_subprogram))
5300 complaint (&symfile_complaints,
5301 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
5302 die->offset, origin_die->offset);
5304 child_die = die->child;
5305 die_children_count = 0;
5306 while (child_die && child_die->tag)
5308 child_die = sibling_die (child_die);
5309 die_children_count++;
5311 offsets = xmalloc (sizeof (*offsets) * die_children_count);
5312 cleanups = make_cleanup (xfree, offsets);
5314 offsets_end = offsets;
5315 child_die = die->child;
5316 while (child_die && child_die->tag)
5318 /* For each CHILD_DIE, find the corresponding child of
5319 ORIGIN_DIE. If there is more than one layer of
5320 DW_AT_abstract_origin, follow them all; there shouldn't be,
5321 but GCC versions at least through 4.4 generate this (GCC PR
5323 struct die_info *child_origin_die = child_die;
5324 struct dwarf2_cu *child_origin_cu = cu;
5328 attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin,
5332 child_origin_die = follow_die_ref (child_origin_die, attr,
5336 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
5337 counterpart may exist. */
5338 if (child_origin_die != child_die)
5340 if (child_die->tag != child_origin_die->tag
5341 && !(child_die->tag == DW_TAG_inlined_subroutine
5342 && child_origin_die->tag == DW_TAG_subprogram))
5343 complaint (&symfile_complaints,
5344 _("Child DIE 0x%x and its abstract origin 0x%x have "
5345 "different tags"), child_die->offset,
5346 child_origin_die->offset);
5347 if (child_origin_die->parent != origin_die)
5348 complaint (&symfile_complaints,
5349 _("Child DIE 0x%x and its abstract origin 0x%x have "
5350 "different parents"), child_die->offset,
5351 child_origin_die->offset);
5353 *offsets_end++ = child_origin_die->offset;
5355 child_die = sibling_die (child_die);
5357 qsort (offsets, offsets_end - offsets, sizeof (*offsets),
5358 unsigned_int_compar);
5359 for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++)
5360 if (offsetp[-1] == *offsetp)
5361 complaint (&symfile_complaints, _("Multiple children of DIE 0x%x refer "
5362 "to DIE 0x%x as their abstract origin"),
5363 die->offset, *offsetp);
5366 origin_child_die = origin_die->child;
5367 while (origin_child_die && origin_child_die->tag)
5369 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
5370 while (offsetp < offsets_end && *offsetp < origin_child_die->offset)
5372 if (offsetp >= offsets_end || *offsetp > origin_child_die->offset)
5374 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
5375 process_die (origin_child_die, origin_cu);
5377 origin_child_die = sibling_die (origin_child_die);
5379 origin_cu->list_in_scope = origin_previous_list_in_scope;
5381 do_cleanups (cleanups);
5385 read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
5387 struct objfile *objfile = cu->objfile;
5388 struct context_stack *new;
5391 struct die_info *child_die;
5392 struct attribute *attr, *call_line, *call_file;
5395 struct block *block;
5396 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
5397 VEC (symbolp) *template_args = NULL;
5398 struct template_symbol *templ_func = NULL;
5402 /* If we do not have call site information, we can't show the
5403 caller of this inlined function. That's too confusing, so
5404 only use the scope for local variables. */
5405 call_line = dwarf2_attr (die, DW_AT_call_line, cu);
5406 call_file = dwarf2_attr (die, DW_AT_call_file, cu);
5407 if (call_line == NULL || call_file == NULL)
5409 read_lexical_block_scope (die, cu);
5414 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5416 name = dwarf2_name (die, cu);
5418 /* Ignore functions with missing or empty names. These are actually
5419 illegal according to the DWARF standard. */
5422 complaint (&symfile_complaints,
5423 _("missing name for subprogram DIE at %d"), die->offset);
5427 /* Ignore functions with missing or invalid low and high pc attributes. */
5428 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
5430 attr = dwarf2_attr (die, DW_AT_external, cu);
5431 if (!attr || !DW_UNSND (attr))
5432 complaint (&symfile_complaints,
5433 _("cannot get low and high bounds for subprogram DIE at %d"),
5441 /* Record the function range for dwarf_decode_lines. */
5442 add_to_cu_func_list (name, lowpc, highpc, cu);
5444 /* If we have any template arguments, then we must allocate a
5445 different sort of symbol. */
5446 for (child_die = die->child; child_die; child_die = sibling_die (child_die))
5448 if (child_die->tag == DW_TAG_template_type_param
5449 || child_die->tag == DW_TAG_template_value_param)
5451 templ_func = OBSTACK_ZALLOC (&objfile->objfile_obstack,
5452 struct template_symbol);
5453 templ_func->base.is_cplus_template_function = 1;
5458 new = push_context (0, lowpc);
5459 new->name = new_symbol_full (die, read_type_die (die, cu), cu,
5460 (struct symbol *) templ_func);
5462 /* If there is a location expression for DW_AT_frame_base, record
5464 attr = dwarf2_attr (die, DW_AT_frame_base, cu);
5466 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
5467 expression is being recorded directly in the function's symbol
5468 and not in a separate frame-base object. I guess this hack is
5469 to avoid adding some sort of frame-base adjunct/annex to the
5470 function's symbol :-(. The problem with doing this is that it
5471 results in a function symbol with a location expression that
5472 has nothing to do with the location of the function, ouch! The
5473 relationship should be: a function's symbol has-a frame base; a
5474 frame-base has-a location expression. */
5475 dwarf2_symbol_mark_computed (attr, new->name, cu);
5477 cu->list_in_scope = &local_symbols;
5479 if (die->child != NULL)
5481 child_die = die->child;
5482 while (child_die && child_die->tag)
5484 if (child_die->tag == DW_TAG_template_type_param
5485 || child_die->tag == DW_TAG_template_value_param)
5487 struct symbol *arg = new_symbol (child_die, NULL, cu);
5489 VEC_safe_push (symbolp, template_args, arg);
5492 process_die (child_die, cu);
5493 child_die = sibling_die (child_die);
5497 inherit_abstract_dies (die, cu);
5499 /* If we have a DW_AT_specification, we might need to import using
5500 directives from the context of the specification DIE. See the
5501 comment in determine_prefix. */
5502 if (cu->language == language_cplus
5503 && dwarf2_attr (die, DW_AT_specification, cu))
5505 struct dwarf2_cu *spec_cu = cu;
5506 struct die_info *spec_die = die_specification (die, &spec_cu);
5510 child_die = spec_die->child;
5511 while (child_die && child_die->tag)
5513 if (child_die->tag == DW_TAG_imported_module)
5514 process_die (child_die, spec_cu);
5515 child_die = sibling_die (child_die);
5518 /* In some cases, GCC generates specification DIEs that
5519 themselves contain DW_AT_specification attributes. */
5520 spec_die = die_specification (spec_die, &spec_cu);
5524 new = pop_context ();
5525 /* Make a block for the local symbols within. */
5526 block = finish_block (new->name, &local_symbols, new->old_blocks,
5527 lowpc, highpc, objfile);
5529 /* For C++, set the block's scope. */
5530 if (cu->language == language_cplus || cu->language == language_fortran)
5531 cp_set_block_scope (new->name, block, &objfile->objfile_obstack,
5532 determine_prefix (die, cu),
5533 processing_has_namespace_info);
5535 /* If we have address ranges, record them. */
5536 dwarf2_record_block_ranges (die, block, baseaddr, cu);
5538 /* Attach template arguments to function. */
5539 if (! VEC_empty (symbolp, template_args))
5541 gdb_assert (templ_func != NULL);
5543 templ_func->n_template_arguments = VEC_length (symbolp, template_args);
5544 templ_func->template_arguments
5545 = obstack_alloc (&objfile->objfile_obstack,
5546 (templ_func->n_template_arguments
5547 * sizeof (struct symbol *)));
5548 memcpy (templ_func->template_arguments,
5549 VEC_address (symbolp, template_args),
5550 (templ_func->n_template_arguments * sizeof (struct symbol *)));
5551 VEC_free (symbolp, template_args);
5554 /* In C++, we can have functions nested inside functions (e.g., when
5555 a function declares a class that has methods). This means that
5556 when we finish processing a function scope, we may need to go
5557 back to building a containing block's symbol lists. */
5558 local_symbols = new->locals;
5559 param_symbols = new->params;
5560 using_directives = new->using_directives;
5562 /* If we've finished processing a top-level function, subsequent
5563 symbols go in the file symbol list. */
5564 if (outermost_context_p ())
5565 cu->list_in_scope = &file_symbols;
5568 /* Process all the DIES contained within a lexical block scope. Start
5569 a new scope, process the dies, and then close the scope. */
5572 read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
5574 struct objfile *objfile = cu->objfile;
5575 struct context_stack *new;
5576 CORE_ADDR lowpc, highpc;
5577 struct die_info *child_die;
5580 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5582 /* Ignore blocks with missing or invalid low and high pc attributes. */
5583 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
5584 as multiple lexical blocks? Handling children in a sane way would
5585 be nasty. Might be easier to properly extend generic blocks to
5587 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
5592 push_context (0, lowpc);
5593 if (die->child != NULL)
5595 child_die = die->child;
5596 while (child_die && child_die->tag)
5598 process_die (child_die, cu);
5599 child_die = sibling_die (child_die);
5602 new = pop_context ();
5604 if (local_symbols != NULL || using_directives != NULL)
5607 = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
5610 /* Note that recording ranges after traversing children, as we
5611 do here, means that recording a parent's ranges entails
5612 walking across all its children's ranges as they appear in
5613 the address map, which is quadratic behavior.
5615 It would be nicer to record the parent's ranges before
5616 traversing its children, simply overriding whatever you find
5617 there. But since we don't even decide whether to create a
5618 block until after we've traversed its children, that's hard
5620 dwarf2_record_block_ranges (die, block, baseaddr, cu);
5622 local_symbols = new->locals;
5623 using_directives = new->using_directives;
5626 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
5627 Return 1 if the attributes are present and valid, otherwise, return 0.
5628 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
5631 dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
5632 CORE_ADDR *high_return, struct dwarf2_cu *cu,
5633 struct partial_symtab *ranges_pst)
5635 struct objfile *objfile = cu->objfile;
5636 struct comp_unit_head *cu_header = &cu->header;
5637 bfd *obfd = objfile->obfd;
5638 unsigned int addr_size = cu_header->addr_size;
5639 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
5640 /* Base address selection entry. */
5651 found_base = cu->base_known;
5652 base = cu->base_address;
5654 dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
5655 if (offset >= dwarf2_per_objfile->ranges.size)
5657 complaint (&symfile_complaints,
5658 _("Offset %d out of bounds for DW_AT_ranges attribute"),
5662 buffer = dwarf2_per_objfile->ranges.buffer + offset;
5664 /* Read in the largest possible address. */
5665 marker = read_address (obfd, buffer, cu, &dummy);
5666 if ((marker & mask) == mask)
5668 /* If we found the largest possible address, then
5669 read the base address. */
5670 base = read_address (obfd, buffer + addr_size, cu, &dummy);
5671 buffer += 2 * addr_size;
5672 offset += 2 * addr_size;
5678 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5682 CORE_ADDR range_beginning, range_end;
5684 range_beginning = read_address (obfd, buffer, cu, &dummy);
5685 buffer += addr_size;
5686 range_end = read_address (obfd, buffer, cu, &dummy);
5687 buffer += addr_size;
5688 offset += 2 * addr_size;
5690 /* An end of list marker is a pair of zero addresses. */
5691 if (range_beginning == 0 && range_end == 0)
5692 /* Found the end of list entry. */
5695 /* Each base address selection entry is a pair of 2 values.
5696 The first is the largest possible address, the second is
5697 the base address. Check for a base address here. */
5698 if ((range_beginning & mask) == mask)
5700 /* If we found the largest possible address, then
5701 read the base address. */
5702 base = read_address (obfd, buffer + addr_size, cu, &dummy);
5709 /* We have no valid base address for the ranges
5711 complaint (&symfile_complaints,
5712 _("Invalid .debug_ranges data (no base address)"));
5716 range_beginning += base;
5719 if (ranges_pst != NULL && range_beginning < range_end)
5720 addrmap_set_empty (objfile->psymtabs_addrmap,
5721 range_beginning + baseaddr, range_end - 1 + baseaddr,
5724 /* FIXME: This is recording everything as a low-high
5725 segment of consecutive addresses. We should have a
5726 data structure for discontiguous block ranges
5730 low = range_beginning;
5736 if (range_beginning < low)
5737 low = range_beginning;
5738 if (range_end > high)
5744 /* If the first entry is an end-of-list marker, the range
5745 describes an empty scope, i.e. no instructions. */
5751 *high_return = high;
5755 /* Get low and high pc attributes from a die. Return 1 if the attributes
5756 are present and valid, otherwise, return 0. Return -1 if the range is
5757 discontinuous, i.e. derived from DW_AT_ranges information. */
5759 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
5760 CORE_ADDR *highpc, struct dwarf2_cu *cu,
5761 struct partial_symtab *pst)
5763 struct attribute *attr;
5768 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
5771 high = DW_ADDR (attr);
5772 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
5774 low = DW_ADDR (attr);
5776 /* Found high w/o low attribute. */
5779 /* Found consecutive range of addresses. */
5784 attr = dwarf2_attr (die, DW_AT_ranges, cu);
5787 /* Value of the DW_AT_ranges attribute is the offset in the
5788 .debug_ranges section. */
5789 if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu, pst))
5791 /* Found discontinuous range of addresses. */
5799 /* When using the GNU linker, .gnu.linkonce. sections are used to
5800 eliminate duplicate copies of functions and vtables and such.
5801 The linker will arbitrarily choose one and discard the others.
5802 The AT_*_pc values for such functions refer to local labels in
5803 these sections. If the section from that file was discarded, the
5804 labels are not in the output, so the relocs get a value of 0.
5805 If this is a discarded function, mark the pc bounds as invalid,
5806 so that GDB will ignore it. */
5807 if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
5815 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
5816 its low and high PC addresses. Do nothing if these addresses could not
5817 be determined. Otherwise, set LOWPC to the low address if it is smaller,
5818 and HIGHPC to the high address if greater than HIGHPC. */
5821 dwarf2_get_subprogram_pc_bounds (struct die_info *die,
5822 CORE_ADDR *lowpc, CORE_ADDR *highpc,
5823 struct dwarf2_cu *cu)
5825 CORE_ADDR low, high;
5826 struct die_info *child = die->child;
5828 if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL))
5830 *lowpc = min (*lowpc, low);
5831 *highpc = max (*highpc, high);
5834 /* If the language does not allow nested subprograms (either inside
5835 subprograms or lexical blocks), we're done. */
5836 if (cu->language != language_ada)
5839 /* Check all the children of the given DIE. If it contains nested
5840 subprograms, then check their pc bounds. Likewise, we need to
5841 check lexical blocks as well, as they may also contain subprogram
5843 while (child && child->tag)
5845 if (child->tag == DW_TAG_subprogram
5846 || child->tag == DW_TAG_lexical_block)
5847 dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu);
5848 child = sibling_die (child);
5852 /* Get the low and high pc's represented by the scope DIE, and store
5853 them in *LOWPC and *HIGHPC. If the correct values can't be
5854 determined, set *LOWPC to -1 and *HIGHPC to 0. */
5857 get_scope_pc_bounds (struct die_info *die,
5858 CORE_ADDR *lowpc, CORE_ADDR *highpc,
5859 struct dwarf2_cu *cu)
5861 CORE_ADDR best_low = (CORE_ADDR) -1;
5862 CORE_ADDR best_high = (CORE_ADDR) 0;
5863 CORE_ADDR current_low, current_high;
5865 if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL))
5867 best_low = current_low;
5868 best_high = current_high;
5872 struct die_info *child = die->child;
5874 while (child && child->tag)
5876 switch (child->tag) {
5877 case DW_TAG_subprogram:
5878 dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu);
5880 case DW_TAG_namespace:
5882 /* FIXME: carlton/2004-01-16: Should we do this for
5883 DW_TAG_class_type/DW_TAG_structure_type, too? I think
5884 that current GCC's always emit the DIEs corresponding
5885 to definitions of methods of classes as children of a
5886 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
5887 the DIEs giving the declarations, which could be
5888 anywhere). But I don't see any reason why the
5889 standards says that they have to be there. */
5890 get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
5892 if (current_low != ((CORE_ADDR) -1))
5894 best_low = min (best_low, current_low);
5895 best_high = max (best_high, current_high);
5903 child = sibling_die (child);
5908 *highpc = best_high;
5911 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
5914 dwarf2_record_block_ranges (struct die_info *die, struct block *block,
5915 CORE_ADDR baseaddr, struct dwarf2_cu *cu)
5917 struct attribute *attr;
5919 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
5922 CORE_ADDR high = DW_ADDR (attr);
5924 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
5927 CORE_ADDR low = DW_ADDR (attr);
5929 record_block_range (block, baseaddr + low, baseaddr + high - 1);
5933 attr = dwarf2_attr (die, DW_AT_ranges, cu);
5936 bfd *obfd = cu->objfile->obfd;
5938 /* The value of the DW_AT_ranges attribute is the offset of the
5939 address range list in the .debug_ranges section. */
5940 unsigned long offset = DW_UNSND (attr);
5941 gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset;
5943 /* For some target architectures, but not others, the
5944 read_address function sign-extends the addresses it returns.
5945 To recognize base address selection entries, we need a
5947 unsigned int addr_size = cu->header.addr_size;
5948 CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
5950 /* The base address, to which the next pair is relative. Note
5951 that this 'base' is a DWARF concept: most entries in a range
5952 list are relative, to reduce the number of relocs against the
5953 debugging information. This is separate from this function's
5954 'baseaddr' argument, which GDB uses to relocate debugging
5955 information from a shared library based on the address at
5956 which the library was loaded. */
5957 CORE_ADDR base = cu->base_address;
5958 int base_known = cu->base_known;
5960 gdb_assert (dwarf2_per_objfile->ranges.readin);
5961 if (offset >= dwarf2_per_objfile->ranges.size)
5963 complaint (&symfile_complaints,
5964 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
5971 unsigned int bytes_read;
5972 CORE_ADDR start, end;
5974 start = read_address (obfd, buffer, cu, &bytes_read);
5975 buffer += bytes_read;
5976 end = read_address (obfd, buffer, cu, &bytes_read);
5977 buffer += bytes_read;
5979 /* Did we find the end of the range list? */
5980 if (start == 0 && end == 0)
5983 /* Did we find a base address selection entry? */
5984 else if ((start & base_select_mask) == base_select_mask)
5990 /* We found an ordinary address range. */
5995 complaint (&symfile_complaints,
5996 _("Invalid .debug_ranges data (no base address)"));
6000 record_block_range (block,
6001 baseaddr + base + start,
6002 baseaddr + base + end - 1);
6008 /* Add an aggregate field to the field list. */
6011 dwarf2_add_field (struct field_info *fip, struct die_info *die,
6012 struct dwarf2_cu *cu)
6014 struct objfile *objfile = cu->objfile;
6015 struct gdbarch *gdbarch = get_objfile_arch (objfile);
6016 struct nextfield *new_field;
6017 struct attribute *attr;
6019 char *fieldname = "";
6021 /* Allocate a new field list entry and link it in. */
6022 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
6023 make_cleanup (xfree, new_field);
6024 memset (new_field, 0, sizeof (struct nextfield));
6026 if (die->tag == DW_TAG_inheritance)
6028 new_field->next = fip->baseclasses;
6029 fip->baseclasses = new_field;
6033 new_field->next = fip->fields;
6034 fip->fields = new_field;
6038 /* Handle accessibility and virtuality of field.
6039 The default accessibility for members is public, the default
6040 accessibility for inheritance is private. */
6041 if (die->tag != DW_TAG_inheritance)
6042 new_field->accessibility = DW_ACCESS_public;
6044 new_field->accessibility = DW_ACCESS_private;
6045 new_field->virtuality = DW_VIRTUALITY_none;
6047 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
6049 new_field->accessibility = DW_UNSND (attr);
6050 if (new_field->accessibility != DW_ACCESS_public)
6051 fip->non_public_fields = 1;
6052 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
6054 new_field->virtuality = DW_UNSND (attr);
6056 fp = &new_field->field;
6058 if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
6060 /* Data member other than a C++ static data member. */
6062 /* Get type of field. */
6063 fp->type = die_type (die, cu);
6065 SET_FIELD_BITPOS (*fp, 0);
6067 /* Get bit size of field (zero if none). */
6068 attr = dwarf2_attr (die, DW_AT_bit_size, cu);
6071 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
6075 FIELD_BITSIZE (*fp) = 0;
6078 /* Get bit offset of field. */
6079 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
6082 int byte_offset = 0;
6084 if (attr_form_is_section_offset (attr))
6085 dwarf2_complex_location_expr_complaint ();
6086 else if (attr_form_is_constant (attr))
6087 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
6088 else if (attr_form_is_block (attr))
6089 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
6091 dwarf2_complex_location_expr_complaint ();
6093 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
6095 attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
6098 if (gdbarch_bits_big_endian (gdbarch))
6100 /* For big endian bits, the DW_AT_bit_offset gives the
6101 additional bit offset from the MSB of the containing
6102 anonymous object to the MSB of the field. We don't
6103 have to do anything special since we don't need to
6104 know the size of the anonymous object. */
6105 FIELD_BITPOS (*fp) += DW_UNSND (attr);
6109 /* For little endian bits, compute the bit offset to the
6110 MSB of the anonymous object, subtract off the number of
6111 bits from the MSB of the field to the MSB of the
6112 object, and then subtract off the number of bits of
6113 the field itself. The result is the bit offset of
6114 the LSB of the field. */
6116 int bit_offset = DW_UNSND (attr);
6118 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6121 /* The size of the anonymous object containing
6122 the bit field is explicit, so use the
6123 indicated size (in bytes). */
6124 anonymous_size = DW_UNSND (attr);
6128 /* The size of the anonymous object containing
6129 the bit field must be inferred from the type
6130 attribute of the data member containing the
6132 anonymous_size = TYPE_LENGTH (fp->type);
6134 FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
6135 - bit_offset - FIELD_BITSIZE (*fp);
6139 /* Get name of field. */
6140 fieldname = dwarf2_name (die, cu);
6141 if (fieldname == NULL)
6144 /* The name is already allocated along with this objfile, so we don't
6145 need to duplicate it for the type. */
6146 fp->name = fieldname;
6148 /* Change accessibility for artificial fields (e.g. virtual table
6149 pointer or virtual base class pointer) to private. */
6150 if (dwarf2_attr (die, DW_AT_artificial, cu))
6152 FIELD_ARTIFICIAL (*fp) = 1;
6153 new_field->accessibility = DW_ACCESS_private;
6154 fip->non_public_fields = 1;
6157 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
6159 /* C++ static member. */
6161 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
6162 is a declaration, but all versions of G++ as of this writing
6163 (so through at least 3.2.1) incorrectly generate
6164 DW_TAG_variable tags. */
6168 /* Get name of field. */
6169 fieldname = dwarf2_name (die, cu);
6170 if (fieldname == NULL)
6173 attr = dwarf2_attr (die, DW_AT_const_value, cu);
6175 /* Only create a symbol if this is an external value.
6176 new_symbol checks this and puts the value in the global symbol
6177 table, which we want. If it is not external, new_symbol
6178 will try to put the value in cu->list_in_scope which is wrong. */
6179 && dwarf2_flag_true_p (die, DW_AT_external, cu))
6181 /* A static const member, not much different than an enum as far as
6182 we're concerned, except that we can support more types. */
6183 new_symbol (die, NULL, cu);
6186 /* Get physical name. */
6187 physname = (char *) dwarf2_physname (fieldname, die, cu);
6189 /* The name is already allocated along with this objfile, so we don't
6190 need to duplicate it for the type. */
6191 SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
6192 FIELD_TYPE (*fp) = die_type (die, cu);
6193 FIELD_NAME (*fp) = fieldname;
6195 else if (die->tag == DW_TAG_inheritance)
6197 /* C++ base class field. */
6198 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
6201 int byte_offset = 0;
6203 if (attr_form_is_section_offset (attr))
6204 dwarf2_complex_location_expr_complaint ();
6205 else if (attr_form_is_constant (attr))
6206 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
6207 else if (attr_form_is_block (attr))
6208 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
6210 dwarf2_complex_location_expr_complaint ();
6212 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
6214 FIELD_BITSIZE (*fp) = 0;
6215 FIELD_TYPE (*fp) = die_type (die, cu);
6216 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
6217 fip->nbaseclasses++;
6221 /* Add a typedef defined in the scope of the FIP's class. */
6224 dwarf2_add_typedef (struct field_info *fip, struct die_info *die,
6225 struct dwarf2_cu *cu)
6227 struct objfile *objfile = cu->objfile;
6228 struct gdbarch *gdbarch = get_objfile_arch (objfile);
6229 struct typedef_field_list *new_field;
6230 struct attribute *attr;
6231 struct typedef_field *fp;
6232 char *fieldname = "";
6234 /* Allocate a new field list entry and link it in. */
6235 new_field = xzalloc (sizeof (*new_field));
6236 make_cleanup (xfree, new_field);
6238 gdb_assert (die->tag == DW_TAG_typedef);
6240 fp = &new_field->field;
6242 /* Get name of field. */
6243 fp->name = dwarf2_name (die, cu);
6244 if (fp->name == NULL)
6247 fp->type = read_type_die (die, cu);
6249 new_field->next = fip->typedef_field_list;
6250 fip->typedef_field_list = new_field;
6251 fip->typedef_field_list_count++;
6254 /* Create the vector of fields, and attach it to the type. */
6257 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
6258 struct dwarf2_cu *cu)
6260 int nfields = fip->nfields;
6262 /* Record the field count, allocate space for the array of fields,
6263 and create blank accessibility bitfields if necessary. */
6264 TYPE_NFIELDS (type) = nfields;
6265 TYPE_FIELDS (type) = (struct field *)
6266 TYPE_ALLOC (type, sizeof (struct field) * nfields);
6267 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
6269 if (fip->non_public_fields && cu->language != language_ada)
6271 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6273 TYPE_FIELD_PRIVATE_BITS (type) =
6274 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
6275 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
6277 TYPE_FIELD_PROTECTED_BITS (type) =
6278 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
6279 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
6281 TYPE_FIELD_IGNORE_BITS (type) =
6282 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
6283 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
6286 /* If the type has baseclasses, allocate and clear a bit vector for
6287 TYPE_FIELD_VIRTUAL_BITS. */
6288 if (fip->nbaseclasses && cu->language != language_ada)
6290 int num_bytes = B_BYTES (fip->nbaseclasses);
6291 unsigned char *pointer;
6293 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6294 pointer = TYPE_ALLOC (type, num_bytes);
6295 TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
6296 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
6297 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
6300 /* Copy the saved-up fields into the field vector. Start from the head
6301 of the list, adding to the tail of the field array, so that they end
6302 up in the same order in the array in which they were added to the list. */
6303 while (nfields-- > 0)
6305 struct nextfield *fieldp;
6309 fieldp = fip->fields;
6310 fip->fields = fieldp->next;
6314 fieldp = fip->baseclasses;
6315 fip->baseclasses = fieldp->next;
6318 TYPE_FIELD (type, nfields) = fieldp->field;
6319 switch (fieldp->accessibility)
6321 case DW_ACCESS_private:
6322 if (cu->language != language_ada)
6323 SET_TYPE_FIELD_PRIVATE (type, nfields);
6326 case DW_ACCESS_protected:
6327 if (cu->language != language_ada)
6328 SET_TYPE_FIELD_PROTECTED (type, nfields);
6331 case DW_ACCESS_public:
6335 /* Unknown accessibility. Complain and treat it as public. */
6337 complaint (&symfile_complaints, _("unsupported accessibility %d"),
6338 fieldp->accessibility);
6342 if (nfields < fip->nbaseclasses)
6344 switch (fieldp->virtuality)
6346 case DW_VIRTUALITY_virtual:
6347 case DW_VIRTUALITY_pure_virtual:
6348 if (cu->language == language_ada)
6349 error ("unexpected virtuality in component of Ada type");
6350 SET_TYPE_FIELD_VIRTUAL (type, nfields);
6357 /* Add a member function to the proper fieldlist. */
6360 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
6361 struct type *type, struct dwarf2_cu *cu)
6363 struct objfile *objfile = cu->objfile;
6364 struct attribute *attr;
6365 struct fnfieldlist *flp;
6367 struct fn_field *fnp;
6369 struct nextfnfield *new_fnfield;
6370 struct type *this_type;
6372 if (cu->language == language_ada)
6373 error ("unexpected member function in Ada type");
6375 /* Get name of member function. */
6376 fieldname = dwarf2_name (die, cu);
6377 if (fieldname == NULL)
6380 /* Look up member function name in fieldlist. */
6381 for (i = 0; i < fip->nfnfields; i++)
6383 if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
6387 /* Create new list element if necessary. */
6388 if (i < fip->nfnfields)
6389 flp = &fip->fnfieldlists[i];
6392 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
6394 fip->fnfieldlists = (struct fnfieldlist *)
6395 xrealloc (fip->fnfieldlists,
6396 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
6397 * sizeof (struct fnfieldlist));
6398 if (fip->nfnfields == 0)
6399 make_cleanup (free_current_contents, &fip->fnfieldlists);
6401 flp = &fip->fnfieldlists[fip->nfnfields];
6402 flp->name = fieldname;
6405 i = fip->nfnfields++;
6408 /* Create a new member function field and chain it to the field list
6410 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
6411 make_cleanup (xfree, new_fnfield);
6412 memset (new_fnfield, 0, sizeof (struct nextfnfield));
6413 new_fnfield->next = flp->head;
6414 flp->head = new_fnfield;
6417 /* Fill in the member function field info. */
6418 fnp = &new_fnfield->fnfield;
6420 /* Delay processing of the physname until later. */
6421 if (cu->language == language_cplus || cu->language == language_java)
6423 add_to_method_list (type, i, flp->length - 1, fieldname,
6428 char *physname = (char *) dwarf2_physname (fieldname, die, cu);
6429 fnp->physname = physname ? physname : "";
6432 fnp->type = alloc_type (objfile);
6433 this_type = read_type_die (die, cu);
6434 if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC)
6436 int nparams = TYPE_NFIELDS (this_type);
6438 /* TYPE is the domain of this method, and THIS_TYPE is the type
6439 of the method itself (TYPE_CODE_METHOD). */
6440 smash_to_method_type (fnp->type, type,
6441 TYPE_TARGET_TYPE (this_type),
6442 TYPE_FIELDS (this_type),
6443 TYPE_NFIELDS (this_type),
6444 TYPE_VARARGS (this_type));
6446 /* Handle static member functions.
6447 Dwarf2 has no clean way to discern C++ static and non-static
6448 member functions. G++ helps GDB by marking the first
6449 parameter for non-static member functions (which is the
6450 this pointer) as artificial. We obtain this information
6451 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
6452 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0)
6453 fnp->voffset = VOFFSET_STATIC;
6456 complaint (&symfile_complaints, _("member function type missing for '%s'"),
6457 dwarf2_full_name (fieldname, die, cu));
6459 /* Get fcontext from DW_AT_containing_type if present. */
6460 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
6461 fnp->fcontext = die_containing_type (die, cu);
6463 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
6464 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
6466 /* Get accessibility. */
6467 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
6470 switch (DW_UNSND (attr))
6472 case DW_ACCESS_private:
6473 fnp->is_private = 1;
6475 case DW_ACCESS_protected:
6476 fnp->is_protected = 1;
6481 /* Check for artificial methods. */
6482 attr = dwarf2_attr (die, DW_AT_artificial, cu);
6483 if (attr && DW_UNSND (attr) != 0)
6484 fnp->is_artificial = 1;
6486 /* Get index in virtual function table if it is a virtual member
6487 function. For older versions of GCC, this is an offset in the
6488 appropriate virtual table, as specified by DW_AT_containing_type.
6489 For everyone else, it is an expression to be evaluated relative
6490 to the object address. */
6492 attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
6495 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0)
6497 if (DW_BLOCK (attr)->data[0] == DW_OP_constu)
6499 /* Old-style GCC. */
6500 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
6502 else if (DW_BLOCK (attr)->data[0] == DW_OP_deref
6503 || (DW_BLOCK (attr)->size > 1
6504 && DW_BLOCK (attr)->data[0] == DW_OP_deref_size
6505 && DW_BLOCK (attr)->data[1] == cu->header.addr_size))
6507 struct dwarf_block blk;
6510 offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref
6512 blk.size = DW_BLOCK (attr)->size - offset;
6513 blk.data = DW_BLOCK (attr)->data + offset;
6514 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu);
6515 if ((fnp->voffset % cu->header.addr_size) != 0)
6516 dwarf2_complex_location_expr_complaint ();
6518 fnp->voffset /= cu->header.addr_size;
6522 dwarf2_complex_location_expr_complaint ();
6525 fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0));
6527 else if (attr_form_is_section_offset (attr))
6529 dwarf2_complex_location_expr_complaint ();
6533 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
6539 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
6540 if (attr && DW_UNSND (attr))
6542 /* GCC does this, as of 2008-08-25; PR debug/37237. */
6543 complaint (&symfile_complaints,
6544 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
6545 fieldname, die->offset);
6546 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6547 TYPE_CPLUS_DYNAMIC (type) = 1;
6552 /* Create the vector of member function fields, and attach it to the type. */
6555 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
6556 struct dwarf2_cu *cu)
6558 struct fnfieldlist *flp;
6559 int total_length = 0;
6562 if (cu->language == language_ada)
6563 error ("unexpected member functions in Ada type");
6565 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6566 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
6567 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
6569 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
6571 struct nextfnfield *nfp = flp->head;
6572 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
6575 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
6576 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
6577 fn_flp->fn_fields = (struct fn_field *)
6578 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
6579 for (k = flp->length; (k--, nfp); nfp = nfp->next)
6580 fn_flp->fn_fields[k] = nfp->fnfield;
6582 total_length += flp->length;
6585 TYPE_NFN_FIELDS (type) = fip->nfnfields;
6586 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
6589 /* Returns non-zero if NAME is the name of a vtable member in CU's
6590 language, zero otherwise. */
6592 is_vtable_name (const char *name, struct dwarf2_cu *cu)
6594 static const char vptr[] = "_vptr";
6595 static const char vtable[] = "vtable";
6597 /* Look for the C++ and Java forms of the vtable. */
6598 if ((cu->language == language_java
6599 && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
6600 || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
6601 && is_cplus_marker (name[sizeof (vptr) - 1])))
6607 /* GCC outputs unnamed structures that are really pointers to member
6608 functions, with the ABI-specified layout. If TYPE describes
6609 such a structure, smash it into a member function type.
6611 GCC shouldn't do this; it should just output pointer to member DIEs.
6612 This is GCC PR debug/28767. */
6615 quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile)
6617 struct type *pfn_type, *domain_type, *new_type;
6619 /* Check for a structure with no name and two children. */
6620 if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2)
6623 /* Check for __pfn and __delta members. */
6624 if (TYPE_FIELD_NAME (type, 0) == NULL
6625 || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0
6626 || TYPE_FIELD_NAME (type, 1) == NULL
6627 || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0)
6630 /* Find the type of the method. */
6631 pfn_type = TYPE_FIELD_TYPE (type, 0);
6632 if (pfn_type == NULL
6633 || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
6634 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
6637 /* Look for the "this" argument. */
6638 pfn_type = TYPE_TARGET_TYPE (pfn_type);
6639 if (TYPE_NFIELDS (pfn_type) == 0
6640 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
6641 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
6644 domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
6645 new_type = alloc_type (objfile);
6646 smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type),
6647 TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
6648 TYPE_VARARGS (pfn_type));
6649 smash_to_methodptr_type (type, new_type);
6652 /* Called when we find the DIE that starts a structure or union scope
6653 (definition) to create a type for the structure or union. Fill in
6654 the type's name and general properties; the members will not be
6655 processed until process_structure_type.
6657 NOTE: we need to call these functions regardless of whether or not the
6658 DIE has a DW_AT_name attribute, since it might be an anonymous
6659 structure or union. This gets the type entered into our set of
6662 However, if the structure is incomplete (an opaque struct/union)
6663 then suppress creating a symbol table entry for it since gdb only
6664 wants to find the one with the complete definition. Note that if
6665 it is complete, we just call new_symbol, which does it's own
6666 checking about whether the struct/union is anonymous or not (and
6667 suppresses creating a symbol table entry itself). */
6669 static struct type *
6670 read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
6672 struct objfile *objfile = cu->objfile;
6674 struct attribute *attr;
6677 /* If the definition of this type lives in .debug_types, read that type.
6678 Don't follow DW_AT_specification though, that will take us back up
6679 the chain and we want to go down. */
6680 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
6683 struct dwarf2_cu *type_cu = cu;
6684 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
6686 /* We could just recurse on read_structure_type, but we need to call
6687 get_die_type to ensure only one type for this DIE is created.
6688 This is important, for example, because for c++ classes we need
6689 TYPE_NAME set which is only done by new_symbol. Blech. */
6690 type = read_type_die (type_die, type_cu);
6692 /* TYPE_CU may not be the same as CU.
6693 Ensure TYPE is recorded in CU's type_hash table. */
6694 return set_die_type (die, type, cu);
6697 type = alloc_type (objfile);
6698 INIT_CPLUS_SPECIFIC (type);
6700 name = dwarf2_name (die, cu);
6703 if (cu->language == language_cplus
6704 || cu->language == language_java)
6706 char *full_name = (char *) dwarf2_full_name (name, die, cu);
6708 /* dwarf2_full_name might have already finished building the DIE's
6709 type. If so, there is no need to continue. */
6710 if (get_die_type (die, cu) != NULL)
6711 return get_die_type (die, cu);
6713 TYPE_TAG_NAME (type) = full_name;
6714 if (die->tag == DW_TAG_structure_type
6715 || die->tag == DW_TAG_class_type)
6716 TYPE_NAME (type) = TYPE_TAG_NAME (type);
6720 /* The name is already allocated along with this objfile, so
6721 we don't need to duplicate it for the type. */
6722 TYPE_TAG_NAME (type) = (char *) name;
6723 if (die->tag == DW_TAG_class_type)
6724 TYPE_NAME (type) = TYPE_TAG_NAME (type);
6728 if (die->tag == DW_TAG_structure_type)
6730 TYPE_CODE (type) = TYPE_CODE_STRUCT;
6732 else if (die->tag == DW_TAG_union_type)
6734 TYPE_CODE (type) = TYPE_CODE_UNION;
6738 TYPE_CODE (type) = TYPE_CODE_CLASS;
6741 if (cu->language == language_cplus && die->tag == DW_TAG_class_type)
6742 TYPE_DECLARED_CLASS (type) = 1;
6744 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6747 TYPE_LENGTH (type) = DW_UNSND (attr);
6751 TYPE_LENGTH (type) = 0;
6754 TYPE_STUB_SUPPORTED (type) = 1;
6755 if (die_is_declaration (die, cu))
6756 TYPE_STUB (type) = 1;
6757 else if (attr == NULL && die->child == NULL
6758 && producer_is_realview (cu->producer))
6759 /* RealView does not output the required DW_AT_declaration
6760 on incomplete types. */
6761 TYPE_STUB (type) = 1;
6763 /* We need to add the type field to the die immediately so we don't
6764 infinitely recurse when dealing with pointers to the structure
6765 type within the structure itself. */
6766 set_die_type (die, type, cu);
6768 /* set_die_type should be already done. */
6769 set_descriptive_type (type, die, cu);
6774 /* Finish creating a structure or union type, including filling in
6775 its members and creating a symbol for it. */
6778 process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
6780 struct objfile *objfile = cu->objfile;
6781 struct die_info *child_die = die->child;
6784 type = get_die_type (die, cu);
6786 type = read_structure_type (die, cu);
6788 if (die->child != NULL && ! die_is_declaration (die, cu))
6790 struct field_info fi;
6791 struct die_info *child_die;
6792 VEC (symbolp) *template_args = NULL;
6793 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
6795 memset (&fi, 0, sizeof (struct field_info));
6797 child_die = die->child;
6799 while (child_die && child_die->tag)
6801 if (child_die->tag == DW_TAG_member
6802 || child_die->tag == DW_TAG_variable)
6804 /* NOTE: carlton/2002-11-05: A C++ static data member
6805 should be a DW_TAG_member that is a declaration, but
6806 all versions of G++ as of this writing (so through at
6807 least 3.2.1) incorrectly generate DW_TAG_variable
6808 tags for them instead. */
6809 dwarf2_add_field (&fi, child_die, cu);
6811 else if (child_die->tag == DW_TAG_subprogram)
6813 /* C++ member function. */
6814 dwarf2_add_member_fn (&fi, child_die, type, cu);
6816 else if (child_die->tag == DW_TAG_inheritance)
6818 /* C++ base class field. */
6819 dwarf2_add_field (&fi, child_die, cu);
6821 else if (child_die->tag == DW_TAG_typedef)
6822 dwarf2_add_typedef (&fi, child_die, cu);
6823 else if (child_die->tag == DW_TAG_template_type_param
6824 || child_die->tag == DW_TAG_template_value_param)
6826 struct symbol *arg = new_symbol (child_die, NULL, cu);
6828 VEC_safe_push (symbolp, template_args, arg);
6831 child_die = sibling_die (child_die);
6834 /* Attach template arguments to type. */
6835 if (! VEC_empty (symbolp, template_args))
6837 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6838 TYPE_N_TEMPLATE_ARGUMENTS (type)
6839 = VEC_length (symbolp, template_args);
6840 TYPE_TEMPLATE_ARGUMENTS (type)
6841 = obstack_alloc (&objfile->objfile_obstack,
6842 (TYPE_N_TEMPLATE_ARGUMENTS (type)
6843 * sizeof (struct symbol *)));
6844 memcpy (TYPE_TEMPLATE_ARGUMENTS (type),
6845 VEC_address (symbolp, template_args),
6846 (TYPE_N_TEMPLATE_ARGUMENTS (type)
6847 * sizeof (struct symbol *)));
6848 VEC_free (symbolp, template_args);
6851 /* Attach fields and member functions to the type. */
6853 dwarf2_attach_fields_to_type (&fi, type, cu);
6856 dwarf2_attach_fn_fields_to_type (&fi, type, cu);
6858 /* Get the type which refers to the base class (possibly this
6859 class itself) which contains the vtable pointer for the current
6860 class from the DW_AT_containing_type attribute. This use of
6861 DW_AT_containing_type is a GNU extension. */
6863 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
6865 struct type *t = die_containing_type (die, cu);
6867 TYPE_VPTR_BASETYPE (type) = t;
6872 /* Our own class provides vtbl ptr. */
6873 for (i = TYPE_NFIELDS (t) - 1;
6874 i >= TYPE_N_BASECLASSES (t);
6877 char *fieldname = TYPE_FIELD_NAME (t, i);
6879 if (is_vtable_name (fieldname, cu))
6881 TYPE_VPTR_FIELDNO (type) = i;
6886 /* Complain if virtual function table field not found. */
6887 if (i < TYPE_N_BASECLASSES (t))
6888 complaint (&symfile_complaints,
6889 _("virtual function table pointer not found when defining class '%s'"),
6890 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
6895 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
6898 else if (cu->producer
6899 && strncmp (cu->producer,
6900 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
6902 /* The IBM XLC compiler does not provide direct indication
6903 of the containing type, but the vtable pointer is
6904 always named __vfp. */
6908 for (i = TYPE_NFIELDS (type) - 1;
6909 i >= TYPE_N_BASECLASSES (type);
6912 if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
6914 TYPE_VPTR_FIELDNO (type) = i;
6915 TYPE_VPTR_BASETYPE (type) = type;
6922 /* Copy fi.typedef_field_list linked list elements content into the
6923 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
6924 if (fi.typedef_field_list)
6926 int i = fi.typedef_field_list_count;
6928 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6929 TYPE_TYPEDEF_FIELD_ARRAY (type)
6930 = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i);
6931 TYPE_TYPEDEF_FIELD_COUNT (type) = i;
6933 /* Reverse the list order to keep the debug info elements order. */
6936 struct typedef_field *dest, *src;
6938 dest = &TYPE_TYPEDEF_FIELD (type, i);
6939 src = &fi.typedef_field_list->field;
6940 fi.typedef_field_list = fi.typedef_field_list->next;
6945 do_cleanups (back_to);
6948 quirk_gcc_member_function_pointer (type, cu->objfile);
6950 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
6951 snapshots) has been known to create a die giving a declaration
6952 for a class that has, as a child, a die giving a definition for a
6953 nested class. So we have to process our children even if the
6954 current die is a declaration. Normally, of course, a declaration
6955 won't have any children at all. */
6957 while (child_die != NULL && child_die->tag)
6959 if (child_die->tag == DW_TAG_member
6960 || child_die->tag == DW_TAG_variable
6961 || child_die->tag == DW_TAG_inheritance
6962 || child_die->tag == DW_TAG_template_value_param
6963 || child_die->tag == DW_TAG_template_type_param)
6968 process_die (child_die, cu);
6970 child_die = sibling_die (child_die);
6973 /* Do not consider external references. According to the DWARF standard,
6974 these DIEs are identified by the fact that they have no byte_size
6975 attribute, and a declaration attribute. */
6976 if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
6977 || !die_is_declaration (die, cu))
6978 new_symbol (die, type, cu);
6981 /* Given a DW_AT_enumeration_type die, set its type. We do not
6982 complete the type's fields yet, or create any symbols. */
6984 static struct type *
6985 read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
6987 struct objfile *objfile = cu->objfile;
6989 struct attribute *attr;
6992 /* If the definition of this type lives in .debug_types, read that type.
6993 Don't follow DW_AT_specification though, that will take us back up
6994 the chain and we want to go down. */
6995 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
6998 struct dwarf2_cu *type_cu = cu;
6999 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
7001 type = read_type_die (type_die, type_cu);
7003 /* TYPE_CU may not be the same as CU.
7004 Ensure TYPE is recorded in CU's type_hash table. */
7005 return set_die_type (die, type, cu);
7008 type = alloc_type (objfile);
7010 TYPE_CODE (type) = TYPE_CODE_ENUM;
7011 name = dwarf2_full_name (NULL, die, cu);
7013 TYPE_TAG_NAME (type) = (char *) name;
7015 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7018 TYPE_LENGTH (type) = DW_UNSND (attr);
7022 TYPE_LENGTH (type) = 0;
7025 /* The enumeration DIE can be incomplete. In Ada, any type can be
7026 declared as private in the package spec, and then defined only
7027 inside the package body. Such types are known as Taft Amendment
7028 Types. When another package uses such a type, an incomplete DIE
7029 may be generated by the compiler. */
7030 if (die_is_declaration (die, cu))
7031 TYPE_STUB (type) = 1;
7033 return set_die_type (die, type, cu);
7036 /* Given a pointer to a die which begins an enumeration, process all
7037 the dies that define the members of the enumeration, and create the
7038 symbol for the enumeration type.
7040 NOTE: We reverse the order of the element list. */
7043 process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
7045 struct type *this_type;
7047 this_type = get_die_type (die, cu);
7048 if (this_type == NULL)
7049 this_type = read_enumeration_type (die, cu);
7051 if (die->child != NULL)
7053 struct die_info *child_die;
7055 struct field *fields = NULL;
7057 int unsigned_enum = 1;
7060 child_die = die->child;
7061 while (child_die && child_die->tag)
7063 if (child_die->tag != DW_TAG_enumerator)
7065 process_die (child_die, cu);
7069 name = dwarf2_name (child_die, cu);
7072 sym = new_symbol (child_die, this_type, cu);
7073 if (SYMBOL_VALUE (sym) < 0)
7076 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
7078 fields = (struct field *)
7080 (num_fields + DW_FIELD_ALLOC_CHUNK)
7081 * sizeof (struct field));
7084 FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym);
7085 FIELD_TYPE (fields[num_fields]) = NULL;
7086 SET_FIELD_BITPOS (fields[num_fields], SYMBOL_VALUE (sym));
7087 FIELD_BITSIZE (fields[num_fields]) = 0;
7093 child_die = sibling_die (child_die);
7098 TYPE_NFIELDS (this_type) = num_fields;
7099 TYPE_FIELDS (this_type) = (struct field *)
7100 TYPE_ALLOC (this_type, sizeof (struct field) * num_fields);
7101 memcpy (TYPE_FIELDS (this_type), fields,
7102 sizeof (struct field) * num_fields);
7106 TYPE_UNSIGNED (this_type) = 1;
7109 new_symbol (die, this_type, cu);
7112 /* Extract all information from a DW_TAG_array_type DIE and put it in
7113 the DIE's type field. For now, this only handles one dimensional
7116 static struct type *
7117 read_array_type (struct die_info *die, struct dwarf2_cu *cu)
7119 struct objfile *objfile = cu->objfile;
7120 struct die_info *child_die;
7122 struct type *element_type, *range_type, *index_type;
7123 struct type **range_types = NULL;
7124 struct attribute *attr;
7126 struct cleanup *back_to;
7129 element_type = die_type (die, cu);
7131 /* The die_type call above may have already set the type for this DIE. */
7132 type = get_die_type (die, cu);
7136 /* Irix 6.2 native cc creates array types without children for
7137 arrays with unspecified length. */
7138 if (die->child == NULL)
7140 index_type = objfile_type (objfile)->builtin_int;
7141 range_type = create_range_type (NULL, index_type, 0, -1);
7142 type = create_array_type (NULL, element_type, range_type);
7143 return set_die_type (die, type, cu);
7146 back_to = make_cleanup (null_cleanup, NULL);
7147 child_die = die->child;
7148 while (child_die && child_die->tag)
7150 if (child_die->tag == DW_TAG_subrange_type)
7152 struct type *child_type = read_type_die (child_die, cu);
7154 if (child_type != NULL)
7156 /* The range type was succesfully read. Save it for
7157 the array type creation. */
7158 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
7160 range_types = (struct type **)
7161 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
7162 * sizeof (struct type *));
7164 make_cleanup (free_current_contents, &range_types);
7166 range_types[ndim++] = child_type;
7169 child_die = sibling_die (child_die);
7172 /* Dwarf2 dimensions are output from left to right, create the
7173 necessary array types in backwards order. */
7175 type = element_type;
7177 if (read_array_order (die, cu) == DW_ORD_col_major)
7182 type = create_array_type (NULL, type, range_types[i++]);
7187 type = create_array_type (NULL, type, range_types[ndim]);
7190 /* Understand Dwarf2 support for vector types (like they occur on
7191 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
7192 array type. This is not part of the Dwarf2/3 standard yet, but a
7193 custom vendor extension. The main difference between a regular
7194 array and the vector variant is that vectors are passed by value
7196 attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
7198 make_vector_type (type);
7200 name = dwarf2_name (die, cu);
7202 TYPE_NAME (type) = name;
7204 /* Install the type in the die. */
7205 set_die_type (die, type, cu);
7207 /* set_die_type should be already done. */
7208 set_descriptive_type (type, die, cu);
7210 do_cleanups (back_to);
7215 static enum dwarf_array_dim_ordering
7216 read_array_order (struct die_info *die, struct dwarf2_cu *cu)
7218 struct attribute *attr;
7220 attr = dwarf2_attr (die, DW_AT_ordering, cu);
7222 if (attr) return DW_SND (attr);
7225 GNU F77 is a special case, as at 08/2004 array type info is the
7226 opposite order to the dwarf2 specification, but data is still
7227 laid out as per normal fortran.
7229 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
7233 if (cu->language == language_fortran
7234 && cu->producer && strstr (cu->producer, "GNU F77"))
7236 return DW_ORD_row_major;
7239 switch (cu->language_defn->la_array_ordering)
7241 case array_column_major:
7242 return DW_ORD_col_major;
7243 case array_row_major:
7245 return DW_ORD_row_major;
7249 /* Extract all information from a DW_TAG_set_type DIE and put it in
7250 the DIE's type field. */
7252 static struct type *
7253 read_set_type (struct die_info *die, struct dwarf2_cu *cu)
7255 struct type *domain_type, *set_type;
7256 struct attribute *attr;
7258 domain_type = die_type (die, cu);
7260 /* The die_type call above may have already set the type for this DIE. */
7261 set_type = get_die_type (die, cu);
7265 set_type = create_set_type (NULL, domain_type);
7267 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7269 TYPE_LENGTH (set_type) = DW_UNSND (attr);
7271 return set_die_type (die, set_type, cu);
7274 /* First cut: install each common block member as a global variable. */
7277 read_common_block (struct die_info *die, struct dwarf2_cu *cu)
7279 struct die_info *child_die;
7280 struct attribute *attr;
7282 CORE_ADDR base = (CORE_ADDR) 0;
7284 attr = dwarf2_attr (die, DW_AT_location, cu);
7287 /* Support the .debug_loc offsets */
7288 if (attr_form_is_block (attr))
7290 base = decode_locdesc (DW_BLOCK (attr), cu);
7292 else if (attr_form_is_section_offset (attr))
7294 dwarf2_complex_location_expr_complaint ();
7298 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
7299 "common block member");
7302 if (die->child != NULL)
7304 child_die = die->child;
7305 while (child_die && child_die->tag)
7307 sym = new_symbol (child_die, NULL, cu);
7308 attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu);
7311 CORE_ADDR byte_offset = 0;
7313 if (attr_form_is_section_offset (attr))
7314 dwarf2_complex_location_expr_complaint ();
7315 else if (attr_form_is_constant (attr))
7316 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
7317 else if (attr_form_is_block (attr))
7318 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
7320 dwarf2_complex_location_expr_complaint ();
7322 SYMBOL_VALUE_ADDRESS (sym) = base + byte_offset;
7323 add_symbol_to_list (sym, &global_symbols);
7325 child_die = sibling_die (child_die);
7330 /* Create a type for a C++ namespace. */
7332 static struct type *
7333 read_namespace_type (struct die_info *die, struct dwarf2_cu *cu)
7335 struct objfile *objfile = cu->objfile;
7336 const char *previous_prefix, *name;
7340 /* For extensions, reuse the type of the original namespace. */
7341 if (dwarf2_attr (die, DW_AT_extension, cu) != NULL)
7343 struct die_info *ext_die;
7344 struct dwarf2_cu *ext_cu = cu;
7346 ext_die = dwarf2_extension (die, &ext_cu);
7347 type = read_type_die (ext_die, ext_cu);
7349 /* EXT_CU may not be the same as CU.
7350 Ensure TYPE is recorded in CU's type_hash table. */
7351 return set_die_type (die, type, cu);
7354 name = namespace_name (die, &is_anonymous, cu);
7356 /* Now build the name of the current namespace. */
7358 previous_prefix = determine_prefix (die, cu);
7359 if (previous_prefix[0] != '\0')
7360 name = typename_concat (&objfile->objfile_obstack,
7361 previous_prefix, name, 0, cu);
7363 /* Create the type. */
7364 type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL,
7366 TYPE_NAME (type) = (char *) name;
7367 TYPE_TAG_NAME (type) = TYPE_NAME (type);
7369 return set_die_type (die, type, cu);
7372 /* Read a C++ namespace. */
7375 read_namespace (struct die_info *die, struct dwarf2_cu *cu)
7377 struct objfile *objfile = cu->objfile;
7381 /* Add a symbol associated to this if we haven't seen the namespace
7382 before. Also, add a using directive if it's an anonymous
7385 if (dwarf2_attr (die, DW_AT_extension, cu) == NULL)
7389 type = read_type_die (die, cu);
7390 new_symbol (die, type, cu);
7392 name = namespace_name (die, &is_anonymous, cu);
7395 const char *previous_prefix = determine_prefix (die, cu);
7397 cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL,
7398 NULL, &objfile->objfile_obstack);
7402 if (die->child != NULL)
7404 struct die_info *child_die = die->child;
7406 while (child_die && child_die->tag)
7408 process_die (child_die, cu);
7409 child_die = sibling_die (child_die);
7414 /* Read a Fortran module as type. This DIE can be only a declaration used for
7415 imported module. Still we need that type as local Fortran "use ... only"
7416 declaration imports depend on the created type in determine_prefix. */
7418 static struct type *
7419 read_module_type (struct die_info *die, struct dwarf2_cu *cu)
7421 struct objfile *objfile = cu->objfile;
7425 module_name = dwarf2_name (die, cu);
7427 complaint (&symfile_complaints, _("DW_TAG_module has no name, offset 0x%x"),
7429 type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile);
7431 /* determine_prefix uses TYPE_TAG_NAME. */
7432 TYPE_TAG_NAME (type) = TYPE_NAME (type);
7434 return set_die_type (die, type, cu);
7437 /* Read a Fortran module. */
7440 read_module (struct die_info *die, struct dwarf2_cu *cu)
7442 struct die_info *child_die = die->child;
7444 while (child_die && child_die->tag)
7446 process_die (child_die, cu);
7447 child_die = sibling_die (child_die);
7451 /* Return the name of the namespace represented by DIE. Set
7452 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
7456 namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
7458 struct die_info *current_die;
7459 const char *name = NULL;
7461 /* Loop through the extensions until we find a name. */
7463 for (current_die = die;
7464 current_die != NULL;
7465 current_die = dwarf2_extension (die, &cu))
7467 name = dwarf2_name (current_die, cu);
7472 /* Is it an anonymous namespace? */
7474 *is_anonymous = (name == NULL);
7476 name = "(anonymous namespace)";
7481 /* Extract all information from a DW_TAG_pointer_type DIE and add to
7482 the user defined type vector. */
7484 static struct type *
7485 read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
7487 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
7488 struct comp_unit_head *cu_header = &cu->header;
7490 struct attribute *attr_byte_size;
7491 struct attribute *attr_address_class;
7492 int byte_size, addr_class;
7493 struct type *target_type;
7495 target_type = die_type (die, cu);
7497 /* The die_type call above may have already set the type for this DIE. */
7498 type = get_die_type (die, cu);
7502 type = lookup_pointer_type (target_type);
7504 attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
7506 byte_size = DW_UNSND (attr_byte_size);
7508 byte_size = cu_header->addr_size;
7510 attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
7511 if (attr_address_class)
7512 addr_class = DW_UNSND (attr_address_class);
7514 addr_class = DW_ADDR_none;
7516 /* If the pointer size or address class is different than the
7517 default, create a type variant marked as such and set the
7518 length accordingly. */
7519 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
7521 if (gdbarch_address_class_type_flags_p (gdbarch))
7525 type_flags = gdbarch_address_class_type_flags
7526 (gdbarch, byte_size, addr_class);
7527 gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
7529 type = make_type_with_address_space (type, type_flags);
7531 else if (TYPE_LENGTH (type) != byte_size)
7533 complaint (&symfile_complaints, _("invalid pointer size %d"), byte_size);
7537 /* Should we also complain about unhandled address classes? */
7541 TYPE_LENGTH (type) = byte_size;
7542 return set_die_type (die, type, cu);
7545 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
7546 the user defined type vector. */
7548 static struct type *
7549 read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
7552 struct type *to_type;
7553 struct type *domain;
7555 to_type = die_type (die, cu);
7556 domain = die_containing_type (die, cu);
7558 /* The calls above may have already set the type for this DIE. */
7559 type = get_die_type (die, cu);
7563 if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
7564 type = lookup_methodptr_type (to_type);
7566 type = lookup_memberptr_type (to_type, domain);
7568 return set_die_type (die, type, cu);
7571 /* Extract all information from a DW_TAG_reference_type DIE and add to
7572 the user defined type vector. */
7574 static struct type *
7575 read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
7577 struct comp_unit_head *cu_header = &cu->header;
7578 struct type *type, *target_type;
7579 struct attribute *attr;
7581 target_type = die_type (die, cu);
7583 /* The die_type call above may have already set the type for this DIE. */
7584 type = get_die_type (die, cu);
7588 type = lookup_reference_type (target_type);
7589 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7592 TYPE_LENGTH (type) = DW_UNSND (attr);
7596 TYPE_LENGTH (type) = cu_header->addr_size;
7598 return set_die_type (die, type, cu);
7601 static struct type *
7602 read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
7604 struct type *base_type, *cv_type;
7606 base_type = die_type (die, cu);
7608 /* The die_type call above may have already set the type for this DIE. */
7609 cv_type = get_die_type (die, cu);
7613 cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
7614 return set_die_type (die, cv_type, cu);
7617 static struct type *
7618 read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
7620 struct type *base_type, *cv_type;
7622 base_type = die_type (die, cu);
7624 /* The die_type call above may have already set the type for this DIE. */
7625 cv_type = get_die_type (die, cu);
7629 cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
7630 return set_die_type (die, cv_type, cu);
7633 /* Extract all information from a DW_TAG_string_type DIE and add to
7634 the user defined type vector. It isn't really a user defined type,
7635 but it behaves like one, with other DIE's using an AT_user_def_type
7636 attribute to reference it. */
7638 static struct type *
7639 read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
7641 struct objfile *objfile = cu->objfile;
7642 struct gdbarch *gdbarch = get_objfile_arch (objfile);
7643 struct type *type, *range_type, *index_type, *char_type;
7644 struct attribute *attr;
7645 unsigned int length;
7647 attr = dwarf2_attr (die, DW_AT_string_length, cu);
7650 length = DW_UNSND (attr);
7654 /* check for the DW_AT_byte_size attribute */
7655 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7658 length = DW_UNSND (attr);
7666 index_type = objfile_type (objfile)->builtin_int;
7667 range_type = create_range_type (NULL, index_type, 1, length);
7668 char_type = language_string_char_type (cu->language_defn, gdbarch);
7669 type = create_string_type (NULL, char_type, range_type);
7671 return set_die_type (die, type, cu);
7674 /* Handle DIES due to C code like:
7678 int (*funcp)(int a, long l);
7682 ('funcp' generates a DW_TAG_subroutine_type DIE)
7685 static struct type *
7686 read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
7688 struct type *type; /* Type that this function returns */
7689 struct type *ftype; /* Function that returns above type */
7690 struct attribute *attr;
7692 type = die_type (die, cu);
7694 /* The die_type call above may have already set the type for this DIE. */
7695 ftype = get_die_type (die, cu);
7699 ftype = lookup_function_type (type);
7701 /* All functions in C++, Pascal and Java have prototypes. */
7702 attr = dwarf2_attr (die, DW_AT_prototyped, cu);
7703 if ((attr && (DW_UNSND (attr) != 0))
7704 || cu->language == language_cplus
7705 || cu->language == language_java
7706 || cu->language == language_pascal)
7707 TYPE_PROTOTYPED (ftype) = 1;
7708 else if (producer_is_realview (cu->producer))
7709 /* RealView does not emit DW_AT_prototyped. We can not
7710 distinguish prototyped and unprototyped functions; default to
7711 prototyped, since that is more common in modern code (and
7712 RealView warns about unprototyped functions). */
7713 TYPE_PROTOTYPED (ftype) = 1;
7715 /* Store the calling convention in the type if it's available in
7716 the subroutine die. Otherwise set the calling convention to
7717 the default value DW_CC_normal. */
7718 attr = dwarf2_attr (die, DW_AT_calling_convention, cu);
7719 TYPE_CALLING_CONVENTION (ftype) = attr ? DW_UNSND (attr) : DW_CC_normal;
7721 /* We need to add the subroutine type to the die immediately so
7722 we don't infinitely recurse when dealing with parameters
7723 declared as the same subroutine type. */
7724 set_die_type (die, ftype, cu);
7726 if (die->child != NULL)
7728 struct type *void_type = objfile_type (cu->objfile)->builtin_void;
7729 struct die_info *child_die;
7730 int nparams, iparams;
7732 /* Count the number of parameters.
7733 FIXME: GDB currently ignores vararg functions, but knows about
7734 vararg member functions. */
7736 child_die = die->child;
7737 while (child_die && child_die->tag)
7739 if (child_die->tag == DW_TAG_formal_parameter)
7741 else if (child_die->tag == DW_TAG_unspecified_parameters)
7742 TYPE_VARARGS (ftype) = 1;
7743 child_die = sibling_die (child_die);
7746 /* Allocate storage for parameters and fill them in. */
7747 TYPE_NFIELDS (ftype) = nparams;
7748 TYPE_FIELDS (ftype) = (struct field *)
7749 TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
7751 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
7752 even if we error out during the parameters reading below. */
7753 for (iparams = 0; iparams < nparams; iparams++)
7754 TYPE_FIELD_TYPE (ftype, iparams) = void_type;
7757 child_die = die->child;
7758 while (child_die && child_die->tag)
7760 if (child_die->tag == DW_TAG_formal_parameter)
7762 struct type *arg_type;
7764 /* DWARF version 2 has no clean way to discern C++
7765 static and non-static member functions. G++ helps
7766 GDB by marking the first parameter for non-static
7767 member functions (which is the this pointer) as
7768 artificial. We pass this information to
7769 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
7771 DWARF version 3 added DW_AT_object_pointer, which GCC
7772 4.5 does not yet generate. */
7773 attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
7775 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
7778 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
7780 /* GCC/43521: In java, the formal parameter
7781 "this" is sometimes not marked with DW_AT_artificial. */
7782 if (cu->language == language_java)
7784 const char *name = dwarf2_name (child_die, cu);
7786 if (name && !strcmp (name, "this"))
7787 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1;
7790 arg_type = die_type (child_die, cu);
7792 /* RealView does not mark THIS as const, which the testsuite
7793 expects. GCC marks THIS as const in method definitions,
7794 but not in the class specifications (GCC PR 43053). */
7795 if (cu->language == language_cplus && !TYPE_CONST (arg_type)
7796 && TYPE_FIELD_ARTIFICIAL (ftype, iparams))
7799 struct dwarf2_cu *arg_cu = cu;
7800 const char *name = dwarf2_name (child_die, cu);
7802 attr = dwarf2_attr (die, DW_AT_object_pointer, cu);
7805 /* If the compiler emits this, use it. */
7806 if (follow_die_ref (die, attr, &arg_cu) == child_die)
7809 else if (name && strcmp (name, "this") == 0)
7810 /* Function definitions will have the argument names. */
7812 else if (name == NULL && iparams == 0)
7813 /* Declarations may not have the names, so like
7814 elsewhere in GDB, assume an artificial first
7815 argument is "this". */
7819 arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type),
7823 TYPE_FIELD_TYPE (ftype, iparams) = arg_type;
7826 child_die = sibling_die (child_die);
7833 static struct type *
7834 read_typedef (struct die_info *die, struct dwarf2_cu *cu)
7836 struct objfile *objfile = cu->objfile;
7837 const char *name = NULL;
7838 struct type *this_type;
7840 name = dwarf2_full_name (NULL, die, cu);
7841 this_type = init_type (TYPE_CODE_TYPEDEF, 0,
7842 TYPE_FLAG_TARGET_STUB, NULL, objfile);
7843 TYPE_NAME (this_type) = (char *) name;
7844 set_die_type (die, this_type, cu);
7845 TYPE_TARGET_TYPE (this_type) = die_type (die, cu);
7849 /* Find a representation of a given base type and install
7850 it in the TYPE field of the die. */
7852 static struct type *
7853 read_base_type (struct die_info *die, struct dwarf2_cu *cu)
7855 struct objfile *objfile = cu->objfile;
7857 struct attribute *attr;
7858 int encoding = 0, size = 0;
7860 enum type_code code = TYPE_CODE_INT;
7862 struct type *target_type = NULL;
7864 attr = dwarf2_attr (die, DW_AT_encoding, cu);
7867 encoding = DW_UNSND (attr);
7869 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7872 size = DW_UNSND (attr);
7874 name = dwarf2_name (die, cu);
7877 complaint (&symfile_complaints,
7878 _("DW_AT_name missing from DW_TAG_base_type"));
7883 case DW_ATE_address:
7884 /* Turn DW_ATE_address into a void * pointer. */
7885 code = TYPE_CODE_PTR;
7886 type_flags |= TYPE_FLAG_UNSIGNED;
7887 target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
7889 case DW_ATE_boolean:
7890 code = TYPE_CODE_BOOL;
7891 type_flags |= TYPE_FLAG_UNSIGNED;
7893 case DW_ATE_complex_float:
7894 code = TYPE_CODE_COMPLEX;
7895 target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
7897 case DW_ATE_decimal_float:
7898 code = TYPE_CODE_DECFLOAT;
7901 code = TYPE_CODE_FLT;
7905 case DW_ATE_unsigned:
7906 type_flags |= TYPE_FLAG_UNSIGNED;
7908 case DW_ATE_signed_char:
7909 if (cu->language == language_ada || cu->language == language_m2
7910 || cu->language == language_pascal)
7911 code = TYPE_CODE_CHAR;
7913 case DW_ATE_unsigned_char:
7914 if (cu->language == language_ada || cu->language == language_m2
7915 || cu->language == language_pascal)
7916 code = TYPE_CODE_CHAR;
7917 type_flags |= TYPE_FLAG_UNSIGNED;
7920 /* We just treat this as an integer and then recognize the
7921 type by name elsewhere. */
7925 complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
7926 dwarf_type_encoding_name (encoding));
7930 type = init_type (code, size, type_flags, NULL, objfile);
7931 TYPE_NAME (type) = name;
7932 TYPE_TARGET_TYPE (type) = target_type;
7934 if (name && strcmp (name, "char") == 0)
7935 TYPE_NOSIGN (type) = 1;
7937 return set_die_type (die, type, cu);
7940 /* Read the given DW_AT_subrange DIE. */
7942 static struct type *
7943 read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
7945 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
7946 struct type *base_type;
7947 struct type *range_type;
7948 struct attribute *attr;
7952 LONGEST negative_mask;
7954 base_type = die_type (die, cu);
7955 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
7956 check_typedef (base_type);
7958 /* The die_type call above may have already set the type for this DIE. */
7959 range_type = get_die_type (die, cu);
7963 if (cu->language == language_fortran)
7965 /* FORTRAN implies a lower bound of 1, if not given. */
7969 /* FIXME: For variable sized arrays either of these could be
7970 a variable rather than a constant value. We'll allow it,
7971 but we don't know how to handle it. */
7972 attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
7974 low = dwarf2_get_attr_constant_value (attr, 0);
7976 attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
7979 if (attr->form == DW_FORM_block1 || is_ref_attr (attr))
7981 /* GCC encodes arrays with unspecified or dynamic length
7982 with a DW_FORM_block1 attribute or a reference attribute.
7983 FIXME: GDB does not yet know how to handle dynamic
7984 arrays properly, treat them as arrays with unspecified
7987 FIXME: jimb/2003-09-22: GDB does not really know
7988 how to handle arrays of unspecified length
7989 either; we just represent them as zero-length
7990 arrays. Choose an appropriate upper bound given
7991 the lower bound we've computed above. */
7995 high = dwarf2_get_attr_constant_value (attr, 1);
7999 attr = dwarf2_attr (die, DW_AT_count, cu);
8002 int count = dwarf2_get_attr_constant_value (attr, 1);
8003 high = low + count - 1;
8007 /* Dwarf-2 specifications explicitly allows to create subrange types
8008 without specifying a base type.
8009 In that case, the base type must be set to the type of
8010 the lower bound, upper bound or count, in that order, if any of these
8011 three attributes references an object that has a type.
8012 If no base type is found, the Dwarf-2 specifications say that
8013 a signed integer type of size equal to the size of an address should
8015 For the following C code: `extern char gdb_int [];'
8016 GCC produces an empty range DIE.
8017 FIXME: muller/2010-05-28: Possible references to object for low bound,
8018 high bound or count are not yet handled by this code.
8020 if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
8022 struct objfile *objfile = cu->objfile;
8023 struct gdbarch *gdbarch = get_objfile_arch (objfile);
8024 int addr_size = gdbarch_addr_bit (gdbarch) /8;
8025 struct type *int_type = objfile_type (objfile)->builtin_int;
8027 /* Test "int", "long int", and "long long int" objfile types,
8028 and select the first one having a size above or equal to the
8029 architecture address size. */
8030 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
8031 base_type = int_type;
8034 int_type = objfile_type (objfile)->builtin_long;
8035 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
8036 base_type = int_type;
8039 int_type = objfile_type (objfile)->builtin_long_long;
8040 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
8041 base_type = int_type;
8047 (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1);
8048 if (!TYPE_UNSIGNED (base_type) && (low & negative_mask))
8049 low |= negative_mask;
8050 if (!TYPE_UNSIGNED (base_type) && (high & negative_mask))
8051 high |= negative_mask;
8053 range_type = create_range_type (NULL, base_type, low, high);
8055 /* Mark arrays with dynamic length at least as an array of unspecified
8056 length. GDB could check the boundary but before it gets implemented at
8057 least allow accessing the array elements. */
8058 if (attr && attr->form == DW_FORM_block1)
8059 TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1;
8061 name = dwarf2_name (die, cu);
8063 TYPE_NAME (range_type) = name;
8065 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
8067 TYPE_LENGTH (range_type) = DW_UNSND (attr);
8069 set_die_type (die, range_type, cu);
8071 /* set_die_type should be already done. */
8072 set_descriptive_type (range_type, die, cu);
8077 static struct type *
8078 read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
8082 /* For now, we only support the C meaning of an unspecified type: void. */
8084 type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile);
8085 TYPE_NAME (type) = dwarf2_name (die, cu);
8087 return set_die_type (die, type, cu);
8090 /* Trivial hash function for die_info: the hash value of a DIE
8091 is its offset in .debug_info for this objfile. */
8094 die_hash (const void *item)
8096 const struct die_info *die = item;
8101 /* Trivial comparison function for die_info structures: two DIEs
8102 are equal if they have the same offset. */
8105 die_eq (const void *item_lhs, const void *item_rhs)
8107 const struct die_info *die_lhs = item_lhs;
8108 const struct die_info *die_rhs = item_rhs;
8110 return die_lhs->offset == die_rhs->offset;
8113 /* Read a whole compilation unit into a linked list of dies. */
8115 static struct die_info *
8116 read_comp_unit (gdb_byte *info_ptr, struct dwarf2_cu *cu)
8118 struct die_reader_specs reader_specs;
8119 int read_abbrevs = 0;
8120 struct cleanup *back_to = NULL;
8121 struct die_info *die;
8123 if (cu->dwarf2_abbrevs == NULL)
8125 dwarf2_read_abbrevs (cu->objfile->obfd, cu);
8126 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
8130 gdb_assert (cu->die_hash == NULL);
8132 = htab_create_alloc_ex (cu->header.length / 12,
8136 &cu->comp_unit_obstack,
8137 hashtab_obstack_allocate,
8138 dummy_obstack_deallocate);
8140 init_cu_die_reader (&reader_specs, cu);
8142 die = read_die_and_children (&reader_specs, info_ptr, &info_ptr, NULL);
8145 do_cleanups (back_to);
8150 /* Main entry point for reading a DIE and all children.
8151 Read the DIE and dump it if requested. */
8153 static struct die_info *
8154 read_die_and_children (const struct die_reader_specs *reader,
8156 gdb_byte **new_info_ptr,
8157 struct die_info *parent)
8159 struct die_info *result = read_die_and_children_1 (reader, info_ptr,
8160 new_info_ptr, parent);
8162 if (dwarf2_die_debug)
8164 fprintf_unfiltered (gdb_stdlog,
8165 "\nRead die from %s of %s:\n",
8166 reader->buffer == dwarf2_per_objfile->info.buffer
8168 : reader->buffer == dwarf2_per_objfile->types.buffer
8170 : "unknown section",
8171 reader->abfd->filename);
8172 dump_die (result, dwarf2_die_debug);
8178 /* Read a single die and all its descendents. Set the die's sibling
8179 field to NULL; set other fields in the die correctly, and set all
8180 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
8181 location of the info_ptr after reading all of those dies. PARENT
8182 is the parent of the die in question. */
8184 static struct die_info *
8185 read_die_and_children_1 (const struct die_reader_specs *reader,
8187 gdb_byte **new_info_ptr,
8188 struct die_info *parent)
8190 struct die_info *die;
8194 cur_ptr = read_full_die (reader, &die, info_ptr, &has_children);
8197 *new_info_ptr = cur_ptr;
8200 store_in_ref_table (die, reader->cu);
8203 die->child = read_die_and_siblings (reader, cur_ptr, new_info_ptr, die);
8207 *new_info_ptr = cur_ptr;
8210 die->sibling = NULL;
8211 die->parent = parent;
8215 /* Read a die, all of its descendents, and all of its siblings; set
8216 all of the fields of all of the dies correctly. Arguments are as
8217 in read_die_and_children. */
8219 static struct die_info *
8220 read_die_and_siblings (const struct die_reader_specs *reader,
8222 gdb_byte **new_info_ptr,
8223 struct die_info *parent)
8225 struct die_info *first_die, *last_sibling;
8229 first_die = last_sibling = NULL;
8233 struct die_info *die
8234 = read_die_and_children_1 (reader, cur_ptr, &cur_ptr, parent);
8238 *new_info_ptr = cur_ptr;
8245 last_sibling->sibling = die;
8251 /* Read the die from the .debug_info section buffer. Set DIEP to
8252 point to a newly allocated die with its information, except for its
8253 child, sibling, and parent fields. Set HAS_CHILDREN to tell
8254 whether the die has children or not. */
8257 read_full_die (const struct die_reader_specs *reader,
8258 struct die_info **diep, gdb_byte *info_ptr,
8261 unsigned int abbrev_number, bytes_read, i, offset;
8262 struct abbrev_info *abbrev;
8263 struct die_info *die;
8264 struct dwarf2_cu *cu = reader->cu;
8265 bfd *abfd = reader->abfd;
8267 offset = info_ptr - reader->buffer;
8268 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
8269 info_ptr += bytes_read;
8277 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
8279 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
8281 bfd_get_filename (abfd));
8283 die = dwarf_alloc_die (cu, abbrev->num_attrs);
8284 die->offset = offset;
8285 die->tag = abbrev->tag;
8286 die->abbrev = abbrev_number;
8288 die->num_attrs = abbrev->num_attrs;
8290 for (i = 0; i < abbrev->num_attrs; ++i)
8291 info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
8292 abfd, info_ptr, cu);
8295 *has_children = abbrev->has_children;
8299 /* In DWARF version 2, the description of the debugging information is
8300 stored in a separate .debug_abbrev section. Before we read any
8301 dies from a section we read in all abbreviations and install them
8302 in a hash table. This function also sets flags in CU describing
8303 the data found in the abbrev table. */
8306 dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu)
8308 struct comp_unit_head *cu_header = &cu->header;
8309 gdb_byte *abbrev_ptr;
8310 struct abbrev_info *cur_abbrev;
8311 unsigned int abbrev_number, bytes_read, abbrev_name;
8312 unsigned int abbrev_form, hash_number;
8313 struct attr_abbrev *cur_attrs;
8314 unsigned int allocated_attrs;
8316 /* Initialize dwarf2 abbrevs */
8317 obstack_init (&cu->abbrev_obstack);
8318 cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack,
8320 * sizeof (struct abbrev_info *)));
8321 memset (cu->dwarf2_abbrevs, 0,
8322 ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
8324 dwarf2_read_section (dwarf2_per_objfile->objfile,
8325 &dwarf2_per_objfile->abbrev);
8326 abbrev_ptr = dwarf2_per_objfile->abbrev.buffer + cu_header->abbrev_offset;
8327 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8328 abbrev_ptr += bytes_read;
8330 allocated_attrs = ATTR_ALLOC_CHUNK;
8331 cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
8333 /* loop until we reach an abbrev number of 0 */
8334 while (abbrev_number)
8336 cur_abbrev = dwarf_alloc_abbrev (cu);
8338 /* read in abbrev header */
8339 cur_abbrev->number = abbrev_number;
8340 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8341 abbrev_ptr += bytes_read;
8342 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
8345 if (cur_abbrev->tag == DW_TAG_namespace)
8346 cu->has_namespace_info = 1;
8348 /* now read in declarations */
8349 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8350 abbrev_ptr += bytes_read;
8351 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8352 abbrev_ptr += bytes_read;
8355 if (cur_abbrev->num_attrs == allocated_attrs)
8357 allocated_attrs += ATTR_ALLOC_CHUNK;
8359 = xrealloc (cur_attrs, (allocated_attrs
8360 * sizeof (struct attr_abbrev)));
8363 /* Record whether this compilation unit might have
8364 inter-compilation-unit references. If we don't know what form
8365 this attribute will have, then it might potentially be a
8366 DW_FORM_ref_addr, so we conservatively expect inter-CU
8369 if (abbrev_form == DW_FORM_ref_addr
8370 || abbrev_form == DW_FORM_indirect)
8371 cu->has_form_ref_addr = 1;
8373 cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
8374 cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
8375 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8376 abbrev_ptr += bytes_read;
8377 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8378 abbrev_ptr += bytes_read;
8381 cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack,
8382 (cur_abbrev->num_attrs
8383 * sizeof (struct attr_abbrev)));
8384 memcpy (cur_abbrev->attrs, cur_attrs,
8385 cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
8387 hash_number = abbrev_number % ABBREV_HASH_SIZE;
8388 cur_abbrev->next = cu->dwarf2_abbrevs[hash_number];
8389 cu->dwarf2_abbrevs[hash_number] = cur_abbrev;
8391 /* Get next abbreviation.
8392 Under Irix6 the abbreviations for a compilation unit are not
8393 always properly terminated with an abbrev number of 0.
8394 Exit loop if we encounter an abbreviation which we have
8395 already read (which means we are about to read the abbreviations
8396 for the next compile unit) or if the end of the abbreviation
8397 table is reached. */
8398 if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev.buffer)
8399 >= dwarf2_per_objfile->abbrev.size)
8401 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8402 abbrev_ptr += bytes_read;
8403 if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL)
8410 /* Release the memory used by the abbrev table for a compilation unit. */
8413 dwarf2_free_abbrev_table (void *ptr_to_cu)
8415 struct dwarf2_cu *cu = ptr_to_cu;
8417 obstack_free (&cu->abbrev_obstack, NULL);
8418 cu->dwarf2_abbrevs = NULL;
8421 /* Lookup an abbrev_info structure in the abbrev hash table. */
8423 static struct abbrev_info *
8424 dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu)
8426 unsigned int hash_number;
8427 struct abbrev_info *abbrev;
8429 hash_number = number % ABBREV_HASH_SIZE;
8430 abbrev = cu->dwarf2_abbrevs[hash_number];
8434 if (abbrev->number == number)
8437 abbrev = abbrev->next;
8442 /* Returns nonzero if TAG represents a type that we might generate a partial
8446 is_type_tag_for_partial (int tag)
8451 /* Some types that would be reasonable to generate partial symbols for,
8452 that we don't at present. */
8453 case DW_TAG_array_type:
8454 case DW_TAG_file_type:
8455 case DW_TAG_ptr_to_member_type:
8456 case DW_TAG_set_type:
8457 case DW_TAG_string_type:
8458 case DW_TAG_subroutine_type:
8460 case DW_TAG_base_type:
8461 case DW_TAG_class_type:
8462 case DW_TAG_interface_type:
8463 case DW_TAG_enumeration_type:
8464 case DW_TAG_structure_type:
8465 case DW_TAG_subrange_type:
8466 case DW_TAG_typedef:
8467 case DW_TAG_union_type:
8474 /* Load all DIEs that are interesting for partial symbols into memory. */
8476 static struct partial_die_info *
8477 load_partial_dies (bfd *abfd, gdb_byte *buffer, gdb_byte *info_ptr,
8478 int building_psymtab, struct dwarf2_cu *cu)
8480 struct partial_die_info *part_die;
8481 struct partial_die_info *parent_die, *last_die, *first_die = NULL;
8482 struct abbrev_info *abbrev;
8483 unsigned int bytes_read;
8484 unsigned int load_all = 0;
8486 int nesting_level = 1;
8491 if (cu->per_cu && cu->per_cu->load_all_dies)
8495 = htab_create_alloc_ex (cu->header.length / 12,
8499 &cu->comp_unit_obstack,
8500 hashtab_obstack_allocate,
8501 dummy_obstack_deallocate);
8503 part_die = obstack_alloc (&cu->comp_unit_obstack,
8504 sizeof (struct partial_die_info));
8508 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
8510 /* A NULL abbrev means the end of a series of children. */
8513 if (--nesting_level == 0)
8515 /* PART_DIE was probably the last thing allocated on the
8516 comp_unit_obstack, so we could call obstack_free
8517 here. We don't do that because the waste is small,
8518 and will be cleaned up when we're done with this
8519 compilation unit. This way, we're also more robust
8520 against other users of the comp_unit_obstack. */
8523 info_ptr += bytes_read;
8524 last_die = parent_die;
8525 parent_die = parent_die->die_parent;
8529 /* Check for template arguments. We never save these; if
8530 they're seen, we just mark the parent, and go on our way. */
8531 if (parent_die != NULL
8532 && cu->language == language_cplus
8533 && (abbrev->tag == DW_TAG_template_type_param
8534 || abbrev->tag == DW_TAG_template_value_param))
8536 parent_die->has_template_arguments = 1;
8540 /* We don't need a partial DIE for the template argument. */
8541 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev,
8547 /* We only recurse into subprograms looking for template arguments.
8548 Skip their other children. */
8550 && cu->language == language_cplus
8551 && parent_die != NULL
8552 && parent_die->tag == DW_TAG_subprogram)
8554 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
8558 /* Check whether this DIE is interesting enough to save. Normally
8559 we would not be interested in members here, but there may be
8560 later variables referencing them via DW_AT_specification (for
8563 && !is_type_tag_for_partial (abbrev->tag)
8564 && abbrev->tag != DW_TAG_enumerator
8565 && abbrev->tag != DW_TAG_subprogram
8566 && abbrev->tag != DW_TAG_lexical_block
8567 && abbrev->tag != DW_TAG_variable
8568 && abbrev->tag != DW_TAG_namespace
8569 && abbrev->tag != DW_TAG_module
8570 && abbrev->tag != DW_TAG_member)
8572 /* Otherwise we skip to the next sibling, if any. */
8573 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
8577 info_ptr = read_partial_die (part_die, abbrev, bytes_read, abfd,
8578 buffer, info_ptr, cu);
8580 /* This two-pass algorithm for processing partial symbols has a
8581 high cost in cache pressure. Thus, handle some simple cases
8582 here which cover the majority of C partial symbols. DIEs
8583 which neither have specification tags in them, nor could have
8584 specification tags elsewhere pointing at them, can simply be
8585 processed and discarded.
8587 This segment is also optional; scan_partial_symbols and
8588 add_partial_symbol will handle these DIEs if we chain
8589 them in normally. When compilers which do not emit large
8590 quantities of duplicate debug information are more common,
8591 this code can probably be removed. */
8593 /* Any complete simple types at the top level (pretty much all
8594 of them, for a language without namespaces), can be processed
8596 if (parent_die == NULL
8597 && part_die->has_specification == 0
8598 && part_die->is_declaration == 0
8599 && (part_die->tag == DW_TAG_typedef
8600 || part_die->tag == DW_TAG_base_type
8601 || part_die->tag == DW_TAG_subrange_type))
8603 if (building_psymtab && part_die->name != NULL)
8604 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
8605 VAR_DOMAIN, LOC_TYPEDEF,
8606 &cu->objfile->static_psymbols,
8607 0, (CORE_ADDR) 0, cu->language, cu->objfile);
8608 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
8612 /* If we're at the second level, and we're an enumerator, and
8613 our parent has no specification (meaning possibly lives in a
8614 namespace elsewhere), then we can add the partial symbol now
8615 instead of queueing it. */
8616 if (part_die->tag == DW_TAG_enumerator
8617 && parent_die != NULL
8618 && parent_die->die_parent == NULL
8619 && parent_die->tag == DW_TAG_enumeration_type
8620 && parent_die->has_specification == 0)
8622 if (part_die->name == NULL)
8623 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
8624 else if (building_psymtab)
8625 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
8626 VAR_DOMAIN, LOC_CONST,
8627 (cu->language == language_cplus
8628 || cu->language == language_java)
8629 ? &cu->objfile->global_psymbols
8630 : &cu->objfile->static_psymbols,
8631 0, (CORE_ADDR) 0, cu->language, cu->objfile);
8633 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
8637 /* We'll save this DIE so link it in. */
8638 part_die->die_parent = parent_die;
8639 part_die->die_sibling = NULL;
8640 part_die->die_child = NULL;
8642 if (last_die && last_die == parent_die)
8643 last_die->die_child = part_die;
8645 last_die->die_sibling = part_die;
8647 last_die = part_die;
8649 if (first_die == NULL)
8650 first_die = part_die;
8652 /* Maybe add the DIE to the hash table. Not all DIEs that we
8653 find interesting need to be in the hash table, because we
8654 also have the parent/sibling/child chains; only those that we
8655 might refer to by offset later during partial symbol reading.
8657 For now this means things that might have be the target of a
8658 DW_AT_specification, DW_AT_abstract_origin, or
8659 DW_AT_extension. DW_AT_extension will refer only to
8660 namespaces; DW_AT_abstract_origin refers to functions (and
8661 many things under the function DIE, but we do not recurse
8662 into function DIEs during partial symbol reading) and
8663 possibly variables as well; DW_AT_specification refers to
8664 declarations. Declarations ought to have the DW_AT_declaration
8665 flag. It happens that GCC forgets to put it in sometimes, but
8666 only for functions, not for types.
8668 Adding more things than necessary to the hash table is harmless
8669 except for the performance cost. Adding too few will result in
8670 wasted time in find_partial_die, when we reread the compilation
8671 unit with load_all_dies set. */
8674 || abbrev->tag == DW_TAG_subprogram
8675 || abbrev->tag == DW_TAG_variable
8676 || abbrev->tag == DW_TAG_namespace
8677 || part_die->is_declaration)
8681 slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
8682 part_die->offset, INSERT);
8686 part_die = obstack_alloc (&cu->comp_unit_obstack,
8687 sizeof (struct partial_die_info));
8689 /* For some DIEs we want to follow their children (if any). For C
8690 we have no reason to follow the children of structures; for other
8691 languages we have to, so that we can get at method physnames
8692 to infer fully qualified class names, for DW_AT_specification,
8693 and for C++ template arguments. For C++, we also look one level
8694 inside functions to find template arguments (if the name of the
8695 function does not already contain the template arguments).
8697 For Ada, we need to scan the children of subprograms and lexical
8698 blocks as well because Ada allows the definition of nested
8699 entities that could be interesting for the debugger, such as
8700 nested subprograms for instance. */
8701 if (last_die->has_children
8703 || last_die->tag == DW_TAG_namespace
8704 || last_die->tag == DW_TAG_module
8705 || last_die->tag == DW_TAG_enumeration_type
8706 || (cu->language == language_cplus
8707 && last_die->tag == DW_TAG_subprogram
8708 && (last_die->name == NULL
8709 || strchr (last_die->name, '<') == NULL))
8710 || (cu->language != language_c
8711 && (last_die->tag == DW_TAG_class_type
8712 || last_die->tag == DW_TAG_interface_type
8713 || last_die->tag == DW_TAG_structure_type
8714 || last_die->tag == DW_TAG_union_type))
8715 || (cu->language == language_ada
8716 && (last_die->tag == DW_TAG_subprogram
8717 || last_die->tag == DW_TAG_lexical_block))))
8720 parent_die = last_die;
8724 /* Otherwise we skip to the next sibling, if any. */
8725 info_ptr = locate_pdi_sibling (last_die, buffer, info_ptr, abfd, cu);
8727 /* Back to the top, do it again. */
8731 /* Read a minimal amount of information into the minimal die structure. */
8734 read_partial_die (struct partial_die_info *part_die,
8735 struct abbrev_info *abbrev,
8736 unsigned int abbrev_len, bfd *abfd,
8737 gdb_byte *buffer, gdb_byte *info_ptr,
8738 struct dwarf2_cu *cu)
8741 struct attribute attr;
8742 int has_low_pc_attr = 0;
8743 int has_high_pc_attr = 0;
8745 memset (part_die, 0, sizeof (struct partial_die_info));
8747 part_die->offset = info_ptr - buffer;
8749 info_ptr += abbrev_len;
8754 part_die->tag = abbrev->tag;
8755 part_die->has_children = abbrev->has_children;
8757 for (i = 0; i < abbrev->num_attrs; ++i)
8759 info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu);
8761 /* Store the data if it is of an attribute we want to keep in a
8762 partial symbol table. */
8766 switch (part_die->tag)
8768 case DW_TAG_compile_unit:
8769 case DW_TAG_type_unit:
8770 /* Compilation units have a DW_AT_name that is a filename, not
8771 a source language identifier. */
8772 case DW_TAG_enumeration_type:
8773 case DW_TAG_enumerator:
8774 /* These tags always have simple identifiers already; no need
8775 to canonicalize them. */
8776 part_die->name = DW_STRING (&attr);
8780 = dwarf2_canonicalize_name (DW_STRING (&attr), cu,
8781 &cu->objfile->objfile_obstack);
8785 case DW_AT_linkage_name:
8786 case DW_AT_MIPS_linkage_name:
8787 /* Note that both forms of linkage name might appear. We
8788 assume they will be the same, and we only store the last
8790 if (cu->language == language_ada)
8791 part_die->name = DW_STRING (&attr);
8794 has_low_pc_attr = 1;
8795 part_die->lowpc = DW_ADDR (&attr);
8798 has_high_pc_attr = 1;
8799 part_die->highpc = DW_ADDR (&attr);
8801 case DW_AT_location:
8802 /* Support the .debug_loc offsets */
8803 if (attr_form_is_block (&attr))
8805 part_die->locdesc = DW_BLOCK (&attr);
8807 else if (attr_form_is_section_offset (&attr))
8809 dwarf2_complex_location_expr_complaint ();
8813 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
8814 "partial symbol information");
8817 case DW_AT_external:
8818 part_die->is_external = DW_UNSND (&attr);
8820 case DW_AT_declaration:
8821 part_die->is_declaration = DW_UNSND (&attr);
8824 part_die->has_type = 1;
8826 case DW_AT_abstract_origin:
8827 case DW_AT_specification:
8828 case DW_AT_extension:
8829 part_die->has_specification = 1;
8830 part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
8833 /* Ignore absolute siblings, they might point outside of
8834 the current compile unit. */
8835 if (attr.form == DW_FORM_ref_addr)
8836 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
8838 part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr);
8840 case DW_AT_byte_size:
8841 part_die->has_byte_size = 1;
8843 case DW_AT_calling_convention:
8844 /* DWARF doesn't provide a way to identify a program's source-level
8845 entry point. DW_AT_calling_convention attributes are only meant
8846 to describe functions' calling conventions.
8848 However, because it's a necessary piece of information in
8849 Fortran, and because DW_CC_program is the only piece of debugging
8850 information whose definition refers to a 'main program' at all,
8851 several compilers have begun marking Fortran main programs with
8852 DW_CC_program --- even when those functions use the standard
8853 calling conventions.
8855 So until DWARF specifies a way to provide this information and
8856 compilers pick up the new representation, we'll support this
8858 if (DW_UNSND (&attr) == DW_CC_program
8859 && cu->language == language_fortran)
8860 set_main_name (part_die->name);
8867 /* When using the GNU linker, .gnu.linkonce. sections are used to
8868 eliminate duplicate copies of functions and vtables and such.
8869 The linker will arbitrarily choose one and discard the others.
8870 The AT_*_pc values for such functions refer to local labels in
8871 these sections. If the section from that file was discarded, the
8872 labels are not in the output, so the relocs get a value of 0.
8873 If this is a discarded function, mark the pc bounds as invalid,
8874 so that GDB will ignore it. */
8875 if (has_low_pc_attr && has_high_pc_attr
8876 && part_die->lowpc < part_die->highpc
8877 && (part_die->lowpc != 0
8878 || dwarf2_per_objfile->has_section_at_zero))
8879 part_die->has_pc_info = 1;
8884 /* Find a cached partial DIE at OFFSET in CU. */
8886 static struct partial_die_info *
8887 find_partial_die_in_comp_unit (unsigned int offset, struct dwarf2_cu *cu)
8889 struct partial_die_info *lookup_die = NULL;
8890 struct partial_die_info part_die;
8892 part_die.offset = offset;
8893 lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset);
8898 /* Find a partial DIE at OFFSET, which may or may not be in CU,
8899 except in the case of .debug_types DIEs which do not reference
8900 outside their CU (they do however referencing other types via
8903 static struct partial_die_info *
8904 find_partial_die (unsigned int offset, struct dwarf2_cu *cu)
8906 struct dwarf2_per_cu_data *per_cu = NULL;
8907 struct partial_die_info *pd = NULL;
8909 if (cu->per_cu->from_debug_types)
8911 pd = find_partial_die_in_comp_unit (offset, cu);
8917 if (offset_in_cu_p (&cu->header, offset))
8919 pd = find_partial_die_in_comp_unit (offset, cu);
8924 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
8926 if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL)
8927 load_partial_comp_unit (per_cu, cu->objfile);
8929 per_cu->cu->last_used = 0;
8930 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
8932 if (pd == NULL && per_cu->load_all_dies == 0)
8934 struct cleanup *back_to;
8935 struct partial_die_info comp_unit_die;
8936 struct abbrev_info *abbrev;
8937 unsigned int bytes_read;
8940 per_cu->load_all_dies = 1;
8942 /* Re-read the DIEs. */
8943 back_to = make_cleanup (null_cleanup, 0);
8944 if (per_cu->cu->dwarf2_abbrevs == NULL)
8946 dwarf2_read_abbrevs (per_cu->cu->objfile->obfd, per_cu->cu);
8947 make_cleanup (dwarf2_free_abbrev_table, per_cu->cu);
8949 info_ptr = (dwarf2_per_objfile->info.buffer
8950 + per_cu->cu->header.offset
8951 + per_cu->cu->header.first_die_offset);
8952 abbrev = peek_die_abbrev (info_ptr, &bytes_read, per_cu->cu);
8953 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
8954 per_cu->cu->objfile->obfd,
8955 dwarf2_per_objfile->info.buffer, info_ptr,
8957 if (comp_unit_die.has_children)
8958 load_partial_dies (per_cu->cu->objfile->obfd,
8959 dwarf2_per_objfile->info.buffer, info_ptr,
8961 do_cleanups (back_to);
8963 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
8969 internal_error (__FILE__, __LINE__,
8970 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
8971 offset, bfd_get_filename (cu->objfile->obfd));
8975 /* Adjust PART_DIE before generating a symbol for it. This function
8976 may set the is_external flag or change the DIE's name. */
8979 fixup_partial_die (struct partial_die_info *part_die,
8980 struct dwarf2_cu *cu)
8982 /* If we found a reference attribute and the DIE has no name, try
8983 to find a name in the referred to DIE. */
8985 if (part_die->name == NULL && part_die->has_specification)
8987 struct partial_die_info *spec_die;
8989 spec_die = find_partial_die (part_die->spec_offset, cu);
8991 fixup_partial_die (spec_die, cu);
8995 part_die->name = spec_die->name;
8997 /* Copy DW_AT_external attribute if it is set. */
8998 if (spec_die->is_external)
8999 part_die->is_external = spec_die->is_external;
9003 /* Set default names for some unnamed DIEs. */
9004 if (part_die->name == NULL && (part_die->tag == DW_TAG_structure_type
9005 || part_die->tag == DW_TAG_class_type))
9006 part_die->name = "(anonymous class)";
9008 if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
9009 part_die->name = "(anonymous namespace)";
9011 if (part_die->tag == DW_TAG_structure_type
9012 || part_die->tag == DW_TAG_class_type
9013 || part_die->tag == DW_TAG_union_type)
9014 guess_structure_name (part_die, cu);
9017 /* Read an attribute value described by an attribute form. */
9020 read_attribute_value (struct attribute *attr, unsigned form,
9021 bfd *abfd, gdb_byte *info_ptr,
9022 struct dwarf2_cu *cu)
9024 struct comp_unit_head *cu_header = &cu->header;
9025 unsigned int bytes_read;
9026 struct dwarf_block *blk;
9031 case DW_FORM_ref_addr:
9032 if (cu->header.version == 2)
9033 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
9035 DW_ADDR (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
9036 info_ptr += bytes_read;
9039 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
9040 info_ptr += bytes_read;
9042 case DW_FORM_block2:
9043 blk = dwarf_alloc_block (cu);
9044 blk->size = read_2_bytes (abfd, info_ptr);
9046 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
9047 info_ptr += blk->size;
9048 DW_BLOCK (attr) = blk;
9050 case DW_FORM_block4:
9051 blk = dwarf_alloc_block (cu);
9052 blk->size = read_4_bytes (abfd, info_ptr);
9054 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
9055 info_ptr += blk->size;
9056 DW_BLOCK (attr) = blk;
9059 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
9063 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
9067 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
9070 case DW_FORM_sec_offset:
9071 DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
9072 info_ptr += bytes_read;
9074 case DW_FORM_string:
9075 DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read);
9076 DW_STRING_IS_CANONICAL (attr) = 0;
9077 info_ptr += bytes_read;
9080 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
9082 DW_STRING_IS_CANONICAL (attr) = 0;
9083 info_ptr += bytes_read;
9085 case DW_FORM_exprloc:
9087 blk = dwarf_alloc_block (cu);
9088 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
9089 info_ptr += bytes_read;
9090 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
9091 info_ptr += blk->size;
9092 DW_BLOCK (attr) = blk;
9094 case DW_FORM_block1:
9095 blk = dwarf_alloc_block (cu);
9096 blk->size = read_1_byte (abfd, info_ptr);
9098 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
9099 info_ptr += blk->size;
9100 DW_BLOCK (attr) = blk;
9103 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
9107 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
9110 case DW_FORM_flag_present:
9111 DW_UNSND (attr) = 1;
9114 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
9115 info_ptr += bytes_read;
9118 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
9119 info_ptr += bytes_read;
9122 DW_ADDR (attr) = cu->header.offset + read_1_byte (abfd, info_ptr);
9126 DW_ADDR (attr) = cu->header.offset + read_2_bytes (abfd, info_ptr);
9130 DW_ADDR (attr) = cu->header.offset + read_4_bytes (abfd, info_ptr);
9134 DW_ADDR (attr) = cu->header.offset + read_8_bytes (abfd, info_ptr);
9138 /* Convert the signature to something we can record in DW_UNSND
9140 NOTE: This is NULL if the type wasn't found. */
9141 DW_SIGNATURED_TYPE (attr) =
9142 lookup_signatured_type (cu->objfile, read_8_bytes (abfd, info_ptr));
9145 case DW_FORM_ref_udata:
9146 DW_ADDR (attr) = (cu->header.offset
9147 + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
9148 info_ptr += bytes_read;
9150 case DW_FORM_indirect:
9151 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
9152 info_ptr += bytes_read;
9153 info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu);
9156 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
9157 dwarf_form_name (form),
9158 bfd_get_filename (abfd));
9161 /* We have seen instances where the compiler tried to emit a byte
9162 size attribute of -1 which ended up being encoded as an unsigned
9163 0xffffffff. Although 0xffffffff is technically a valid size value,
9164 an object of this size seems pretty unlikely so we can relatively
9165 safely treat these cases as if the size attribute was invalid and
9166 treat them as zero by default. */
9167 if (attr->name == DW_AT_byte_size
9168 && form == DW_FORM_data4
9169 && DW_UNSND (attr) >= 0xffffffff)
9172 (&symfile_complaints,
9173 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
9174 hex_string (DW_UNSND (attr)));
9175 DW_UNSND (attr) = 0;
9181 /* Read an attribute described by an abbreviated attribute. */
9184 read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
9185 bfd *abfd, gdb_byte *info_ptr, struct dwarf2_cu *cu)
9187 attr->name = abbrev->name;
9188 return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu);
9191 /* read dwarf information from a buffer */
9194 read_1_byte (bfd *abfd, gdb_byte *buf)
9196 return bfd_get_8 (abfd, buf);
9200 read_1_signed_byte (bfd *abfd, gdb_byte *buf)
9202 return bfd_get_signed_8 (abfd, buf);
9206 read_2_bytes (bfd *abfd, gdb_byte *buf)
9208 return bfd_get_16 (abfd, buf);
9212 read_2_signed_bytes (bfd *abfd, gdb_byte *buf)
9214 return bfd_get_signed_16 (abfd, buf);
9218 read_4_bytes (bfd *abfd, gdb_byte *buf)
9220 return bfd_get_32 (abfd, buf);
9224 read_4_signed_bytes (bfd *abfd, gdb_byte *buf)
9226 return bfd_get_signed_32 (abfd, buf);
9230 read_8_bytes (bfd *abfd, gdb_byte *buf)
9232 return bfd_get_64 (abfd, buf);
9236 read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
9237 unsigned int *bytes_read)
9239 struct comp_unit_head *cu_header = &cu->header;
9240 CORE_ADDR retval = 0;
9242 if (cu_header->signed_addr_p)
9244 switch (cu_header->addr_size)
9247 retval = bfd_get_signed_16 (abfd, buf);
9250 retval = bfd_get_signed_32 (abfd, buf);
9253 retval = bfd_get_signed_64 (abfd, buf);
9256 internal_error (__FILE__, __LINE__,
9257 _("read_address: bad switch, signed [in module %s]"),
9258 bfd_get_filename (abfd));
9263 switch (cu_header->addr_size)
9266 retval = bfd_get_16 (abfd, buf);
9269 retval = bfd_get_32 (abfd, buf);
9272 retval = bfd_get_64 (abfd, buf);
9275 internal_error (__FILE__, __LINE__,
9276 _("read_address: bad switch, unsigned [in module %s]"),
9277 bfd_get_filename (abfd));
9281 *bytes_read = cu_header->addr_size;
9285 /* Read the initial length from a section. The (draft) DWARF 3
9286 specification allows the initial length to take up either 4 bytes
9287 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
9288 bytes describe the length and all offsets will be 8 bytes in length
9291 An older, non-standard 64-bit format is also handled by this
9292 function. The older format in question stores the initial length
9293 as an 8-byte quantity without an escape value. Lengths greater
9294 than 2^32 aren't very common which means that the initial 4 bytes
9295 is almost always zero. Since a length value of zero doesn't make
9296 sense for the 32-bit format, this initial zero can be considered to
9297 be an escape value which indicates the presence of the older 64-bit
9298 format. As written, the code can't detect (old format) lengths
9299 greater than 4GB. If it becomes necessary to handle lengths
9300 somewhat larger than 4GB, we could allow other small values (such
9301 as the non-sensical values of 1, 2, and 3) to also be used as
9302 escape values indicating the presence of the old format.
9304 The value returned via bytes_read should be used to increment the
9305 relevant pointer after calling read_initial_length().
9307 [ Note: read_initial_length() and read_offset() are based on the
9308 document entitled "DWARF Debugging Information Format", revision
9309 3, draft 8, dated November 19, 2001. This document was obtained
9312 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
9314 This document is only a draft and is subject to change. (So beware.)
9316 Details regarding the older, non-standard 64-bit format were
9317 determined empirically by examining 64-bit ELF files produced by
9318 the SGI toolchain on an IRIX 6.5 machine.
9320 - Kevin, July 16, 2002
9324 read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read)
9326 LONGEST length = bfd_get_32 (abfd, buf);
9328 if (length == 0xffffffff)
9330 length = bfd_get_64 (abfd, buf + 4);
9333 else if (length == 0)
9335 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
9336 length = bfd_get_64 (abfd, buf);
9347 /* Cover function for read_initial_length.
9348 Returns the length of the object at BUF, and stores the size of the
9349 initial length in *BYTES_READ and stores the size that offsets will be in
9351 If the initial length size is not equivalent to that specified in
9352 CU_HEADER then issue a complaint.
9353 This is useful when reading non-comp-unit headers. */
9356 read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf,
9357 const struct comp_unit_head *cu_header,
9358 unsigned int *bytes_read,
9359 unsigned int *offset_size)
9361 LONGEST length = read_initial_length (abfd, buf, bytes_read);
9363 gdb_assert (cu_header->initial_length_size == 4
9364 || cu_header->initial_length_size == 8
9365 || cu_header->initial_length_size == 12);
9367 if (cu_header->initial_length_size != *bytes_read)
9368 complaint (&symfile_complaints,
9369 _("intermixed 32-bit and 64-bit DWARF sections"));
9371 *offset_size = (*bytes_read == 4) ? 4 : 8;
9375 /* Read an offset from the data stream. The size of the offset is
9376 given by cu_header->offset_size. */
9379 read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
9380 unsigned int *bytes_read)
9382 LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size);
9384 *bytes_read = cu_header->offset_size;
9388 /* Read an offset from the data stream. */
9391 read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size)
9395 switch (offset_size)
9398 retval = bfd_get_32 (abfd, buf);
9401 retval = bfd_get_64 (abfd, buf);
9404 internal_error (__FILE__, __LINE__,
9405 _("read_offset_1: bad switch [in module %s]"),
9406 bfd_get_filename (abfd));
9413 read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
9415 /* If the size of a host char is 8 bits, we can return a pointer
9416 to the buffer, otherwise we have to copy the data to a buffer
9417 allocated on the temporary obstack. */
9418 gdb_assert (HOST_CHAR_BIT == 8);
9423 read_direct_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
9425 /* If the size of a host char is 8 bits, we can return a pointer
9426 to the string, otherwise we have to copy the string to a buffer
9427 allocated on the temporary obstack. */
9428 gdb_assert (HOST_CHAR_BIT == 8);
9431 *bytes_read_ptr = 1;
9434 *bytes_read_ptr = strlen ((char *) buf) + 1;
9435 return (char *) buf;
9439 read_indirect_string (bfd *abfd, gdb_byte *buf,
9440 const struct comp_unit_head *cu_header,
9441 unsigned int *bytes_read_ptr)
9443 LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr);
9445 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str);
9446 if (dwarf2_per_objfile->str.buffer == NULL)
9448 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
9449 bfd_get_filename (abfd));
9452 if (str_offset >= dwarf2_per_objfile->str.size)
9454 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
9455 bfd_get_filename (abfd));
9458 gdb_assert (HOST_CHAR_BIT == 8);
9459 if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
9461 return (char *) (dwarf2_per_objfile->str.buffer + str_offset);
9464 static unsigned long
9465 read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
9467 unsigned long result;
9468 unsigned int num_read;
9478 byte = bfd_get_8 (abfd, buf);
9481 result |= ((unsigned long)(byte & 127) << shift);
9482 if ((byte & 128) == 0)
9488 *bytes_read_ptr = num_read;
9493 read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
9496 int i, shift, num_read;
9505 byte = bfd_get_8 (abfd, buf);
9508 result |= ((long)(byte & 127) << shift);
9510 if ((byte & 128) == 0)
9515 if ((shift < 8 * sizeof (result)) && (byte & 0x40))
9516 result |= -(((long)1) << shift);
9517 *bytes_read_ptr = num_read;
9521 /* Return a pointer to just past the end of an LEB128 number in BUF. */
9524 skip_leb128 (bfd *abfd, gdb_byte *buf)
9530 byte = bfd_get_8 (abfd, buf);
9532 if ((byte & 128) == 0)
9538 set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
9545 cu->language = language_c;
9547 case DW_LANG_C_plus_plus:
9548 cu->language = language_cplus;
9551 cu->language = language_d;
9553 case DW_LANG_Fortran77:
9554 case DW_LANG_Fortran90:
9555 case DW_LANG_Fortran95:
9556 cu->language = language_fortran;
9558 case DW_LANG_Mips_Assembler:
9559 cu->language = language_asm;
9562 cu->language = language_java;
9566 cu->language = language_ada;
9568 case DW_LANG_Modula2:
9569 cu->language = language_m2;
9571 case DW_LANG_Pascal83:
9572 cu->language = language_pascal;
9575 cu->language = language_objc;
9577 case DW_LANG_Cobol74:
9578 case DW_LANG_Cobol85:
9580 cu->language = language_minimal;
9583 cu->language_defn = language_def (cu->language);
9586 /* Return the named attribute or NULL if not there. */
9588 static struct attribute *
9589 dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
9592 struct attribute *spec = NULL;
9594 for (i = 0; i < die->num_attrs; ++i)
9596 if (die->attrs[i].name == name)
9597 return &die->attrs[i];
9598 if (die->attrs[i].name == DW_AT_specification
9599 || die->attrs[i].name == DW_AT_abstract_origin)
9600 spec = &die->attrs[i];
9605 die = follow_die_ref (die, spec, &cu);
9606 return dwarf2_attr (die, name, cu);
9612 /* Return the named attribute or NULL if not there,
9613 but do not follow DW_AT_specification, etc.
9614 This is for use in contexts where we're reading .debug_types dies.
9615 Following DW_AT_specification, DW_AT_abstract_origin will take us
9616 back up the chain, and we want to go down. */
9618 static struct attribute *
9619 dwarf2_attr_no_follow (struct die_info *die, unsigned int name,
9620 struct dwarf2_cu *cu)
9624 for (i = 0; i < die->num_attrs; ++i)
9625 if (die->attrs[i].name == name)
9626 return &die->attrs[i];
9631 /* Return non-zero iff the attribute NAME is defined for the given DIE,
9632 and holds a non-zero value. This function should only be used for
9633 DW_FORM_flag or DW_FORM_flag_present attributes. */
9636 dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
9638 struct attribute *attr = dwarf2_attr (die, name, cu);
9640 return (attr && DW_UNSND (attr));
9644 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
9646 /* A DIE is a declaration if it has a DW_AT_declaration attribute
9647 which value is non-zero. However, we have to be careful with
9648 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
9649 (via dwarf2_flag_true_p) follows this attribute. So we may
9650 end up accidently finding a declaration attribute that belongs
9651 to a different DIE referenced by the specification attribute,
9652 even though the given DIE does not have a declaration attribute. */
9653 return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
9654 && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
9657 /* Return the die giving the specification for DIE, if there is
9658 one. *SPEC_CU is the CU containing DIE on input, and the CU
9659 containing the return value on output. If there is no
9660 specification, but there is an abstract origin, that is
9663 static struct die_info *
9664 die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
9666 struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
9669 if (spec_attr == NULL)
9670 spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu);
9672 if (spec_attr == NULL)
9675 return follow_die_ref (die, spec_attr, spec_cu);
9678 /* Free the line_header structure *LH, and any arrays and strings it
9681 free_line_header (struct line_header *lh)
9683 if (lh->standard_opcode_lengths)
9684 xfree (lh->standard_opcode_lengths);
9686 /* Remember that all the lh->file_names[i].name pointers are
9687 pointers into debug_line_buffer, and don't need to be freed. */
9689 xfree (lh->file_names);
9691 /* Similarly for the include directory names. */
9692 if (lh->include_dirs)
9693 xfree (lh->include_dirs);
9699 /* Add an entry to LH's include directory table. */
9701 add_include_dir (struct line_header *lh, char *include_dir)
9703 /* Grow the array if necessary. */
9704 if (lh->include_dirs_size == 0)
9706 lh->include_dirs_size = 1; /* for testing */
9707 lh->include_dirs = xmalloc (lh->include_dirs_size
9708 * sizeof (*lh->include_dirs));
9710 else if (lh->num_include_dirs >= lh->include_dirs_size)
9712 lh->include_dirs_size *= 2;
9713 lh->include_dirs = xrealloc (lh->include_dirs,
9714 (lh->include_dirs_size
9715 * sizeof (*lh->include_dirs)));
9718 lh->include_dirs[lh->num_include_dirs++] = include_dir;
9722 /* Add an entry to LH's file name table. */
9724 add_file_name (struct line_header *lh,
9726 unsigned int dir_index,
9727 unsigned int mod_time,
9728 unsigned int length)
9730 struct file_entry *fe;
9732 /* Grow the array if necessary. */
9733 if (lh->file_names_size == 0)
9735 lh->file_names_size = 1; /* for testing */
9736 lh->file_names = xmalloc (lh->file_names_size
9737 * sizeof (*lh->file_names));
9739 else if (lh->num_file_names >= lh->file_names_size)
9741 lh->file_names_size *= 2;
9742 lh->file_names = xrealloc (lh->file_names,
9743 (lh->file_names_size
9744 * sizeof (*lh->file_names)));
9747 fe = &lh->file_names[lh->num_file_names++];
9749 fe->dir_index = dir_index;
9750 fe->mod_time = mod_time;
9751 fe->length = length;
9757 /* Read the statement program header starting at OFFSET in
9758 .debug_line, according to the endianness of ABFD. Return a pointer
9759 to a struct line_header, allocated using xmalloc.
9761 NOTE: the strings in the include directory and file name tables of
9762 the returned object point into debug_line_buffer, and must not be
9764 static struct line_header *
9765 dwarf_decode_line_header (unsigned int offset, bfd *abfd,
9766 struct dwarf2_cu *cu)
9768 struct cleanup *back_to;
9769 struct line_header *lh;
9771 unsigned int bytes_read, offset_size;
9773 char *cur_dir, *cur_file;
9775 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->line);
9776 if (dwarf2_per_objfile->line.buffer == NULL)
9778 complaint (&symfile_complaints, _("missing .debug_line section"));
9782 /* Make sure that at least there's room for the total_length field.
9783 That could be 12 bytes long, but we're just going to fudge that. */
9784 if (offset + 4 >= dwarf2_per_objfile->line.size)
9786 dwarf2_statement_list_fits_in_line_number_section_complaint ();
9790 lh = xmalloc (sizeof (*lh));
9791 memset (lh, 0, sizeof (*lh));
9792 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
9795 line_ptr = dwarf2_per_objfile->line.buffer + offset;
9797 /* Read in the header. */
9799 read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header,
9800 &bytes_read, &offset_size);
9801 line_ptr += bytes_read;
9802 if (line_ptr + lh->total_length > (dwarf2_per_objfile->line.buffer
9803 + dwarf2_per_objfile->line.size))
9805 dwarf2_statement_list_fits_in_line_number_section_complaint ();
9808 lh->statement_program_end = line_ptr + lh->total_length;
9809 lh->version = read_2_bytes (abfd, line_ptr);
9811 lh->header_length = read_offset_1 (abfd, line_ptr, offset_size);
9812 line_ptr += offset_size;
9813 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
9815 if (lh->version >= 4)
9817 lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr);
9821 lh->maximum_ops_per_instruction = 1;
9823 if (lh->maximum_ops_per_instruction == 0)
9825 lh->maximum_ops_per_instruction = 1;
9826 complaint (&symfile_complaints,
9827 _("invalid maximum_ops_per_instruction in `.debug_line' section"));
9830 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
9832 lh->line_base = read_1_signed_byte (abfd, line_ptr);
9834 lh->line_range = read_1_byte (abfd, line_ptr);
9836 lh->opcode_base = read_1_byte (abfd, line_ptr);
9838 lh->standard_opcode_lengths
9839 = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
9841 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
9842 for (i = 1; i < lh->opcode_base; ++i)
9844 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
9848 /* Read directory table. */
9849 while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL)
9851 line_ptr += bytes_read;
9852 add_include_dir (lh, cur_dir);
9854 line_ptr += bytes_read;
9856 /* Read file name table. */
9857 while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL)
9859 unsigned int dir_index, mod_time, length;
9861 line_ptr += bytes_read;
9862 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
9863 line_ptr += bytes_read;
9864 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
9865 line_ptr += bytes_read;
9866 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
9867 line_ptr += bytes_read;
9869 add_file_name (lh, cur_file, dir_index, mod_time, length);
9871 line_ptr += bytes_read;
9872 lh->statement_program_start = line_ptr;
9874 if (line_ptr > (dwarf2_per_objfile->line.buffer
9875 + dwarf2_per_objfile->line.size))
9876 complaint (&symfile_complaints,
9877 _("line number info header doesn't fit in `.debug_line' section"));
9879 discard_cleanups (back_to);
9883 /* This function exists to work around a bug in certain compilers
9884 (particularly GCC 2.95), in which the first line number marker of a
9885 function does not show up until after the prologue, right before
9886 the second line number marker. This function shifts ADDRESS down
9887 to the beginning of the function if necessary, and is called on
9888 addresses passed to record_line. */
9891 check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu)
9893 struct function_range *fn;
9895 /* Find the function_range containing address. */
9900 cu->cached_fn = cu->first_fn;
9904 if (fn->lowpc <= address && fn->highpc > address)
9910 while (fn && fn != cu->cached_fn)
9911 if (fn->lowpc <= address && fn->highpc > address)
9921 if (address != fn->lowpc)
9922 complaint (&symfile_complaints,
9923 _("misplaced first line number at 0x%lx for '%s'"),
9924 (unsigned long) address, fn->name);
9929 /* Subroutine of dwarf_decode_lines to simplify it.
9930 Return the file name of the psymtab for included file FILE_INDEX
9931 in line header LH of PST.
9932 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
9933 If space for the result is malloc'd, it will be freed by a cleanup.
9934 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
9937 psymtab_include_file_name (const struct line_header *lh, int file_index,
9938 const struct partial_symtab *pst,
9939 const char *comp_dir)
9941 const struct file_entry fe = lh->file_names [file_index];
9942 char *include_name = fe.name;
9943 char *include_name_to_compare = include_name;
9944 char *dir_name = NULL;
9949 dir_name = lh->include_dirs[fe.dir_index - 1];
9951 if (!IS_ABSOLUTE_PATH (include_name)
9952 && (dir_name != NULL || comp_dir != NULL))
9954 /* Avoid creating a duplicate psymtab for PST.
9955 We do this by comparing INCLUDE_NAME and PST_FILENAME.
9956 Before we do the comparison, however, we need to account
9957 for DIR_NAME and COMP_DIR.
9958 First prepend dir_name (if non-NULL). If we still don't
9959 have an absolute path prepend comp_dir (if non-NULL).
9960 However, the directory we record in the include-file's
9961 psymtab does not contain COMP_DIR (to match the
9962 corresponding symtab(s)).
9967 bash$ gcc -g ./hello.c
9968 include_name = "hello.c"
9970 DW_AT_comp_dir = comp_dir = "/tmp"
9971 DW_AT_name = "./hello.c" */
9973 if (dir_name != NULL)
9975 include_name = concat (dir_name, SLASH_STRING,
9976 include_name, (char *)NULL);
9977 include_name_to_compare = include_name;
9978 make_cleanup (xfree, include_name);
9980 if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL)
9982 include_name_to_compare = concat (comp_dir, SLASH_STRING,
9983 include_name, (char *)NULL);
9987 pst_filename = pst->filename;
9988 if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
9990 pst_filename = concat (pst->dirname, SLASH_STRING,
9991 pst_filename, (char *)NULL);
9994 file_is_pst = strcmp (include_name_to_compare, pst_filename) == 0;
9996 if (include_name_to_compare != include_name)
9997 xfree (include_name_to_compare);
9998 if (pst_filename != pst->filename)
9999 xfree (pst_filename);
10003 return include_name;
10006 /* Decode the Line Number Program (LNP) for the given line_header
10007 structure and CU. The actual information extracted and the type
10008 of structures created from the LNP depends on the value of PST.
10010 1. If PST is NULL, then this procedure uses the data from the program
10011 to create all necessary symbol tables, and their linetables.
10013 2. If PST is not NULL, this procedure reads the program to determine
10014 the list of files included by the unit represented by PST, and
10015 builds all the associated partial symbol tables.
10017 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
10018 It is used for relative paths in the line table.
10019 NOTE: When processing partial symtabs (pst != NULL),
10020 comp_dir == pst->dirname.
10022 NOTE: It is important that psymtabs have the same file name (via strcmp)
10023 as the corresponding symtab. Since COMP_DIR is not used in the name of the
10024 symtab we don't use it in the name of the psymtabs we create.
10025 E.g. expand_line_sal requires this when finding psymtabs to expand.
10026 A good testcase for this is mb-inline.exp. */
10029 dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd,
10030 struct dwarf2_cu *cu, struct partial_symtab *pst)
10032 gdb_byte *line_ptr, *extended_end;
10033 gdb_byte *line_end;
10034 unsigned int bytes_read, extended_len;
10035 unsigned char op_code, extended_op, adj_opcode;
10036 CORE_ADDR baseaddr;
10037 struct objfile *objfile = cu->objfile;
10038 struct gdbarch *gdbarch = get_objfile_arch (objfile);
10039 const int decode_for_pst_p = (pst != NULL);
10040 struct subfile *last_subfile = NULL, *first_subfile = current_subfile;
10042 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
10044 line_ptr = lh->statement_program_start;
10045 line_end = lh->statement_program_end;
10047 /* Read the statement sequences until there's nothing left. */
10048 while (line_ptr < line_end)
10050 /* state machine registers */
10051 CORE_ADDR address = 0;
10052 unsigned int file = 1;
10053 unsigned int line = 1;
10054 unsigned int column = 0;
10055 int is_stmt = lh->default_is_stmt;
10056 int basic_block = 0;
10057 int end_sequence = 0;
10059 unsigned char op_index = 0;
10061 if (!decode_for_pst_p && lh->num_file_names >= file)
10063 /* Start a subfile for the current file of the state machine. */
10064 /* lh->include_dirs and lh->file_names are 0-based, but the
10065 directory and file name numbers in the statement program
10067 struct file_entry *fe = &lh->file_names[file - 1];
10071 dir = lh->include_dirs[fe->dir_index - 1];
10073 dwarf2_start_subfile (fe->name, dir, comp_dir);
10076 /* Decode the table. */
10077 while (!end_sequence)
10079 op_code = read_1_byte (abfd, line_ptr);
10081 if (line_ptr > line_end)
10083 dwarf2_debug_line_missing_end_sequence_complaint ();
10087 if (op_code >= lh->opcode_base)
10089 /* Special operand. */
10090 adj_opcode = op_code - lh->opcode_base;
10091 address += (((op_index + (adj_opcode / lh->line_range))
10092 / lh->maximum_ops_per_instruction)
10093 * lh->minimum_instruction_length);
10094 op_index = ((op_index + (adj_opcode / lh->line_range))
10095 % lh->maximum_ops_per_instruction);
10096 line += lh->line_base + (adj_opcode % lh->line_range);
10097 if (lh->num_file_names < file || file == 0)
10098 dwarf2_debug_line_missing_file_complaint ();
10099 /* For now we ignore lines not starting on an
10100 instruction boundary. */
10101 else if (op_index == 0)
10103 lh->file_names[file - 1].included_p = 1;
10104 if (!decode_for_pst_p && is_stmt)
10106 if (last_subfile != current_subfile)
10108 addr = gdbarch_addr_bits_remove (gdbarch, address);
10110 record_line (last_subfile, 0, addr);
10111 last_subfile = current_subfile;
10113 /* Append row to matrix using current values. */
10114 addr = check_cu_functions (address, cu);
10115 addr = gdbarch_addr_bits_remove (gdbarch, addr);
10116 record_line (current_subfile, line, addr);
10121 else switch (op_code)
10123 case DW_LNS_extended_op:
10124 extended_len = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10125 line_ptr += bytes_read;
10126 extended_end = line_ptr + extended_len;
10127 extended_op = read_1_byte (abfd, line_ptr);
10129 switch (extended_op)
10131 case DW_LNE_end_sequence:
10134 case DW_LNE_set_address:
10135 address = read_address (abfd, line_ptr, cu, &bytes_read);
10137 line_ptr += bytes_read;
10138 address += baseaddr;
10140 case DW_LNE_define_file:
10143 unsigned int dir_index, mod_time, length;
10145 cur_file = read_direct_string (abfd, line_ptr, &bytes_read);
10146 line_ptr += bytes_read;
10148 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10149 line_ptr += bytes_read;
10151 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10152 line_ptr += bytes_read;
10154 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10155 line_ptr += bytes_read;
10156 add_file_name (lh, cur_file, dir_index, mod_time, length);
10159 case DW_LNE_set_discriminator:
10160 /* The discriminator is not interesting to the debugger;
10162 line_ptr = extended_end;
10165 complaint (&symfile_complaints,
10166 _("mangled .debug_line section"));
10169 /* Make sure that we parsed the extended op correctly. If e.g.
10170 we expected a different address size than the producer used,
10171 we may have read the wrong number of bytes. */
10172 if (line_ptr != extended_end)
10174 complaint (&symfile_complaints,
10175 _("mangled .debug_line section"));
10180 if (lh->num_file_names < file || file == 0)
10181 dwarf2_debug_line_missing_file_complaint ();
10184 lh->file_names[file - 1].included_p = 1;
10185 if (!decode_for_pst_p && is_stmt)
10187 if (last_subfile != current_subfile)
10189 addr = gdbarch_addr_bits_remove (gdbarch, address);
10191 record_line (last_subfile, 0, addr);
10192 last_subfile = current_subfile;
10194 addr = check_cu_functions (address, cu);
10195 addr = gdbarch_addr_bits_remove (gdbarch, addr);
10196 record_line (current_subfile, line, addr);
10201 case DW_LNS_advance_pc:
10204 = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10206 address += (((op_index + adjust)
10207 / lh->maximum_ops_per_instruction)
10208 * lh->minimum_instruction_length);
10209 op_index = ((op_index + adjust)
10210 % lh->maximum_ops_per_instruction);
10211 line_ptr += bytes_read;
10214 case DW_LNS_advance_line:
10215 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
10216 line_ptr += bytes_read;
10218 case DW_LNS_set_file:
10220 /* The arrays lh->include_dirs and lh->file_names are
10221 0-based, but the directory and file name numbers in
10222 the statement program are 1-based. */
10223 struct file_entry *fe;
10226 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10227 line_ptr += bytes_read;
10228 if (lh->num_file_names < file || file == 0)
10229 dwarf2_debug_line_missing_file_complaint ();
10232 fe = &lh->file_names[file - 1];
10234 dir = lh->include_dirs[fe->dir_index - 1];
10235 if (!decode_for_pst_p)
10237 last_subfile = current_subfile;
10238 dwarf2_start_subfile (fe->name, dir, comp_dir);
10243 case DW_LNS_set_column:
10244 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10245 line_ptr += bytes_read;
10247 case DW_LNS_negate_stmt:
10248 is_stmt = (!is_stmt);
10250 case DW_LNS_set_basic_block:
10253 /* Add to the address register of the state machine the
10254 address increment value corresponding to special opcode
10255 255. I.e., this value is scaled by the minimum
10256 instruction length since special opcode 255 would have
10257 scaled the the increment. */
10258 case DW_LNS_const_add_pc:
10260 CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range;
10262 address += (((op_index + adjust)
10263 / lh->maximum_ops_per_instruction)
10264 * lh->minimum_instruction_length);
10265 op_index = ((op_index + adjust)
10266 % lh->maximum_ops_per_instruction);
10269 case DW_LNS_fixed_advance_pc:
10270 address += read_2_bytes (abfd, line_ptr);
10276 /* Unknown standard opcode, ignore it. */
10279 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
10281 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10282 line_ptr += bytes_read;
10287 if (lh->num_file_names < file || file == 0)
10288 dwarf2_debug_line_missing_file_complaint ();
10291 lh->file_names[file - 1].included_p = 1;
10292 if (!decode_for_pst_p)
10294 addr = gdbarch_addr_bits_remove (gdbarch, address);
10295 record_line (current_subfile, 0, addr);
10300 if (decode_for_pst_p)
10304 /* Now that we're done scanning the Line Header Program, we can
10305 create the psymtab of each included file. */
10306 for (file_index = 0; file_index < lh->num_file_names; file_index++)
10307 if (lh->file_names[file_index].included_p == 1)
10309 char *include_name =
10310 psymtab_include_file_name (lh, file_index, pst, comp_dir);
10311 if (include_name != NULL)
10312 dwarf2_create_include_psymtab (include_name, pst, objfile);
10317 /* Make sure a symtab is created for every file, even files
10318 which contain only variables (i.e. no code with associated
10322 struct file_entry *fe;
10324 for (i = 0; i < lh->num_file_names; i++)
10328 fe = &lh->file_names[i];
10330 dir = lh->include_dirs[fe->dir_index - 1];
10331 dwarf2_start_subfile (fe->name, dir, comp_dir);
10333 /* Skip the main file; we don't need it, and it must be
10334 allocated last, so that it will show up before the
10335 non-primary symtabs in the objfile's symtab list. */
10336 if (current_subfile == first_subfile)
10339 if (current_subfile->symtab == NULL)
10340 current_subfile->symtab = allocate_symtab (current_subfile->name,
10342 fe->symtab = current_subfile->symtab;
10347 /* Start a subfile for DWARF. FILENAME is the name of the file and
10348 DIRNAME the name of the source directory which contains FILENAME
10349 or NULL if not known. COMP_DIR is the compilation directory for the
10350 linetable's compilation unit or NULL if not known.
10351 This routine tries to keep line numbers from identical absolute and
10352 relative file names in a common subfile.
10354 Using the `list' example from the GDB testsuite, which resides in
10355 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
10356 of /srcdir/list0.c yields the following debugging information for list0.c:
10358 DW_AT_name: /srcdir/list0.c
10359 DW_AT_comp_dir: /compdir
10360 files.files[0].name: list0.h
10361 files.files[0].dir: /srcdir
10362 files.files[1].name: list0.c
10363 files.files[1].dir: /srcdir
10365 The line number information for list0.c has to end up in a single
10366 subfile, so that `break /srcdir/list0.c:1' works as expected.
10367 start_subfile will ensure that this happens provided that we pass the
10368 concatenation of files.files[1].dir and files.files[1].name as the
10372 dwarf2_start_subfile (char *filename, char *dirname, char *comp_dir)
10376 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
10377 `start_symtab' will always pass the contents of DW_AT_comp_dir as
10378 second argument to start_subfile. To be consistent, we do the
10379 same here. In order not to lose the line information directory,
10380 we concatenate it to the filename when it makes sense.
10381 Note that the Dwarf3 standard says (speaking of filenames in line
10382 information): ``The directory index is ignored for file names
10383 that represent full path names''. Thus ignoring dirname in the
10384 `else' branch below isn't an issue. */
10386 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
10387 fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
10389 fullname = filename;
10391 start_subfile (fullname, comp_dir);
10393 if (fullname != filename)
10398 var_decode_location (struct attribute *attr, struct symbol *sym,
10399 struct dwarf2_cu *cu)
10401 struct objfile *objfile = cu->objfile;
10402 struct comp_unit_head *cu_header = &cu->header;
10404 /* NOTE drow/2003-01-30: There used to be a comment and some special
10405 code here to turn a symbol with DW_AT_external and a
10406 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
10407 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
10408 with some versions of binutils) where shared libraries could have
10409 relocations against symbols in their debug information - the
10410 minimal symbol would have the right address, but the debug info
10411 would not. It's no longer necessary, because we will explicitly
10412 apply relocations when we read in the debug information now. */
10414 /* A DW_AT_location attribute with no contents indicates that a
10415 variable has been optimized away. */
10416 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
10418 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
10422 /* Handle one degenerate form of location expression specially, to
10423 preserve GDB's previous behavior when section offsets are
10424 specified. If this is just a DW_OP_addr then mark this symbol
10427 if (attr_form_is_block (attr)
10428 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
10429 && DW_BLOCK (attr)->data[0] == DW_OP_addr)
10431 unsigned int dummy;
10433 SYMBOL_VALUE_ADDRESS (sym) =
10434 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
10435 SYMBOL_CLASS (sym) = LOC_STATIC;
10436 fixup_symbol_section (sym, objfile);
10437 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
10438 SYMBOL_SECTION (sym));
10442 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
10443 expression evaluator, and use LOC_COMPUTED only when necessary
10444 (i.e. when the value of a register or memory location is
10445 referenced, or a thread-local block, etc.). Then again, it might
10446 not be worthwhile. I'm assuming that it isn't unless performance
10447 or memory numbers show me otherwise. */
10449 dwarf2_symbol_mark_computed (attr, sym, cu);
10450 SYMBOL_CLASS (sym) = LOC_COMPUTED;
10453 /* Given a pointer to a DWARF information entry, figure out if we need
10454 to make a symbol table entry for it, and if so, create a new entry
10455 and return a pointer to it.
10456 If TYPE is NULL, determine symbol type from the die, otherwise
10457 used the passed type.
10458 If SPACE is not NULL, use it to hold the new symbol. If it is
10459 NULL, allocate a new symbol on the objfile's obstack. */
10461 static struct symbol *
10462 new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu,
10463 struct symbol *space)
10465 struct objfile *objfile = cu->objfile;
10466 struct symbol *sym = NULL;
10468 struct attribute *attr = NULL;
10469 struct attribute *attr2 = NULL;
10470 CORE_ADDR baseaddr;
10471 struct pending **list_to_add = NULL;
10473 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
10475 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
10477 name = dwarf2_name (die, cu);
10480 const char *linkagename;
10481 int suppress_add = 0;
10486 sym = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol);
10487 OBJSTAT (objfile, n_syms++);
10489 /* Cache this symbol's name and the name's demangled form (if any). */
10490 SYMBOL_SET_LANGUAGE (sym, cu->language);
10491 linkagename = dwarf2_physname (name, die, cu);
10492 SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile);
10494 /* Fortran does not have mangling standard and the mangling does differ
10495 between gfortran, iFort etc. */
10496 if (cu->language == language_fortran
10497 && symbol_get_demangled_name (&(sym->ginfo)) == NULL)
10498 symbol_set_demangled_name (&(sym->ginfo),
10499 (char *) dwarf2_full_name (name, die, cu),
10502 /* Default assumptions.
10503 Use the passed type or decode it from the die. */
10504 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
10505 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
10507 SYMBOL_TYPE (sym) = type;
10509 SYMBOL_TYPE (sym) = die_type (die, cu);
10510 attr = dwarf2_attr (die,
10511 inlined_func ? DW_AT_call_line : DW_AT_decl_line,
10515 SYMBOL_LINE (sym) = DW_UNSND (attr);
10518 attr = dwarf2_attr (die,
10519 inlined_func ? DW_AT_call_file : DW_AT_decl_file,
10523 int file_index = DW_UNSND (attr);
10525 if (cu->line_header == NULL
10526 || file_index > cu->line_header->num_file_names)
10527 complaint (&symfile_complaints,
10528 _("file index out of range"));
10529 else if (file_index > 0)
10531 struct file_entry *fe;
10533 fe = &cu->line_header->file_names[file_index - 1];
10534 SYMBOL_SYMTAB (sym) = fe->symtab;
10541 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
10544 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
10546 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr;
10547 SYMBOL_DOMAIN (sym) = LABEL_DOMAIN;
10548 SYMBOL_CLASS (sym) = LOC_LABEL;
10549 add_symbol_to_list (sym, cu->list_in_scope);
10551 case DW_TAG_subprogram:
10552 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10554 SYMBOL_CLASS (sym) = LOC_BLOCK;
10555 attr2 = dwarf2_attr (die, DW_AT_external, cu);
10556 if ((attr2 && (DW_UNSND (attr2) != 0))
10557 || cu->language == language_ada)
10559 /* Subprograms marked external are stored as a global symbol.
10560 Ada subprograms, whether marked external or not, are always
10561 stored as a global symbol, because we want to be able to
10562 access them globally. For instance, we want to be able
10563 to break on a nested subprogram without having to
10564 specify the context. */
10565 list_to_add = &global_symbols;
10569 list_to_add = cu->list_in_scope;
10572 case DW_TAG_inlined_subroutine:
10573 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10575 SYMBOL_CLASS (sym) = LOC_BLOCK;
10576 SYMBOL_INLINED (sym) = 1;
10577 /* Do not add the symbol to any lists. It will be found via
10578 BLOCK_FUNCTION from the blockvector. */
10580 case DW_TAG_template_value_param:
10582 /* Fall through. */
10583 case DW_TAG_variable:
10584 case DW_TAG_member:
10585 /* Compilation with minimal debug info may result in variables
10586 with missing type entries. Change the misleading `void' type
10587 to something sensible. */
10588 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
10590 = objfile_type (objfile)->nodebug_data_symbol;
10592 attr = dwarf2_attr (die, DW_AT_const_value, cu);
10593 /* In the case of DW_TAG_member, we should only be called for
10594 static const members. */
10595 if (die->tag == DW_TAG_member)
10597 /* dwarf2_add_field uses die_is_declaration,
10598 so we do the same. */
10599 gdb_assert (die_is_declaration (die, cu));
10604 dwarf2_const_value (attr, sym, cu);
10605 attr2 = dwarf2_attr (die, DW_AT_external, cu);
10608 if (attr2 && (DW_UNSND (attr2) != 0))
10609 list_to_add = &global_symbols;
10611 list_to_add = cu->list_in_scope;
10615 attr = dwarf2_attr (die, DW_AT_location, cu);
10618 var_decode_location (attr, sym, cu);
10619 attr2 = dwarf2_attr (die, DW_AT_external, cu);
10620 if (SYMBOL_CLASS (sym) == LOC_STATIC
10621 && SYMBOL_VALUE_ADDRESS (sym) == 0
10622 && !dwarf2_per_objfile->has_section_at_zero)
10624 /* When a static variable is eliminated by the linker,
10625 the corresponding debug information is not stripped
10626 out, but the variable address is set to null;
10627 do not add such variables into symbol table. */
10629 else if (attr2 && (DW_UNSND (attr2) != 0))
10631 /* Workaround gfortran PR debug/40040 - it uses
10632 DW_AT_location for variables in -fPIC libraries which may
10633 get overriden by other libraries/executable and get
10634 a different address. Resolve it by the minimal symbol
10635 which may come from inferior's executable using copy
10636 relocation. Make this workaround only for gfortran as for
10637 other compilers GDB cannot guess the minimal symbol
10638 Fortran mangling kind. */
10639 if (cu->language == language_fortran && die->parent
10640 && die->parent->tag == DW_TAG_module
10642 && strncmp (cu->producer, "GNU Fortran ", 12) == 0)
10643 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
10645 /* A variable with DW_AT_external is never static,
10646 but it may be block-scoped. */
10647 list_to_add = (cu->list_in_scope == &file_symbols
10648 ? &global_symbols : cu->list_in_scope);
10651 list_to_add = cu->list_in_scope;
10655 /* We do not know the address of this symbol.
10656 If it is an external symbol and we have type information
10657 for it, enter the symbol as a LOC_UNRESOLVED symbol.
10658 The address of the variable will then be determined from
10659 the minimal symbol table whenever the variable is
10661 attr2 = dwarf2_attr (die, DW_AT_external, cu);
10662 if (attr2 && (DW_UNSND (attr2) != 0)
10663 && dwarf2_attr (die, DW_AT_type, cu) != NULL)
10665 /* A variable with DW_AT_external is never static, but it
10666 may be block-scoped. */
10667 list_to_add = (cu->list_in_scope == &file_symbols
10668 ? &global_symbols : cu->list_in_scope);
10670 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
10672 else if (!die_is_declaration (die, cu))
10674 /* Use the default LOC_OPTIMIZED_OUT class. */
10675 gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT);
10677 list_to_add = cu->list_in_scope;
10681 case DW_TAG_formal_parameter:
10682 /* If we are inside a function, mark this as an argument. If
10683 not, we might be looking at an argument to an inlined function
10684 when we do not have enough information to show inlined frames;
10685 pretend it's a local variable in that case so that the user can
10687 if (context_stack_depth > 0
10688 && context_stack[context_stack_depth - 1].name != NULL)
10689 SYMBOL_IS_ARGUMENT (sym) = 1;
10690 attr = dwarf2_attr (die, DW_AT_location, cu);
10693 var_decode_location (attr, sym, cu);
10695 attr = dwarf2_attr (die, DW_AT_const_value, cu);
10698 dwarf2_const_value (attr, sym, cu);
10700 attr = dwarf2_attr (die, DW_AT_variable_parameter, cu);
10701 if (attr && DW_UNSND (attr))
10703 struct type *ref_type;
10705 ref_type = lookup_reference_type (SYMBOL_TYPE (sym));
10706 SYMBOL_TYPE (sym) = ref_type;
10709 list_to_add = cu->list_in_scope;
10711 case DW_TAG_unspecified_parameters:
10712 /* From varargs functions; gdb doesn't seem to have any
10713 interest in this information, so just ignore it for now.
10716 case DW_TAG_template_type_param:
10718 /* Fall through. */
10719 case DW_TAG_class_type:
10720 case DW_TAG_interface_type:
10721 case DW_TAG_structure_type:
10722 case DW_TAG_union_type:
10723 case DW_TAG_set_type:
10724 case DW_TAG_enumeration_type:
10725 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
10726 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
10729 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
10730 really ever be static objects: otherwise, if you try
10731 to, say, break of a class's method and you're in a file
10732 which doesn't mention that class, it won't work unless
10733 the check for all static symbols in lookup_symbol_aux
10734 saves you. See the OtherFileClass tests in
10735 gdb.c++/namespace.exp. */
10739 list_to_add = (cu->list_in_scope == &file_symbols
10740 && (cu->language == language_cplus
10741 || cu->language == language_java)
10742 ? &global_symbols : cu->list_in_scope);
10744 /* The semantics of C++ state that "struct foo {
10745 ... }" also defines a typedef for "foo". A Java
10746 class declaration also defines a typedef for the
10748 if (cu->language == language_cplus
10749 || cu->language == language_java
10750 || cu->language == language_ada)
10752 /* The symbol's name is already allocated along
10753 with this objfile, so we don't need to
10754 duplicate it for the type. */
10755 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
10756 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
10761 case DW_TAG_typedef:
10762 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
10763 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
10764 list_to_add = cu->list_in_scope;
10766 case DW_TAG_base_type:
10767 case DW_TAG_subrange_type:
10768 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
10769 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
10770 list_to_add = cu->list_in_scope;
10772 case DW_TAG_enumerator:
10773 attr = dwarf2_attr (die, DW_AT_const_value, cu);
10776 dwarf2_const_value (attr, sym, cu);
10779 /* NOTE: carlton/2003-11-10: See comment above in the
10780 DW_TAG_class_type, etc. block. */
10782 list_to_add = (cu->list_in_scope == &file_symbols
10783 && (cu->language == language_cplus
10784 || cu->language == language_java)
10785 ? &global_symbols : cu->list_in_scope);
10788 case DW_TAG_namespace:
10789 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
10790 list_to_add = &global_symbols;
10793 /* Not a tag we recognize. Hopefully we aren't processing
10794 trash data, but since we must specifically ignore things
10795 we don't recognize, there is nothing else we should do at
10797 complaint (&symfile_complaints, _("unsupported tag: '%s'"),
10798 dwarf_tag_name (die->tag));
10804 sym->hash_next = objfile->template_symbols;
10805 objfile->template_symbols = sym;
10806 list_to_add = NULL;
10809 if (list_to_add != NULL)
10810 add_symbol_to_list (sym, list_to_add);
10812 /* For the benefit of old versions of GCC, check for anonymous
10813 namespaces based on the demangled name. */
10814 if (!processing_has_namespace_info
10815 && cu->language == language_cplus)
10816 cp_scan_for_anonymous_namespaces (sym);
10821 /* A wrapper for new_symbol_full that always allocates a new symbol. */
10823 static struct symbol *
10824 new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
10826 return new_symbol_full (die, type, cu, NULL);
10829 /* Given an attr with a DW_FORM_dataN value in host byte order,
10830 zero-extend it as appropriate for the symbol's type. The DWARF
10831 standard (v4) is not entirely clear about the meaning of using
10832 DW_FORM_dataN for a constant with a signed type, where the type is
10833 wider than the data. The conclusion of a discussion on the DWARF
10834 list was that this is unspecified. We choose to always zero-extend
10835 because that is the interpretation long in use by GCC. */
10838 dwarf2_const_value_data (struct attribute *attr, struct type *type,
10839 const char *name, struct obstack *obstack,
10840 struct dwarf2_cu *cu, long *value, int bits)
10842 struct objfile *objfile = cu->objfile;
10843 enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ?
10844 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
10845 LONGEST l = DW_UNSND (attr);
10847 if (bits < sizeof (*value) * 8)
10849 l &= ((LONGEST) 1 << bits) - 1;
10852 else if (bits == sizeof (*value) * 8)
10856 gdb_byte *bytes = obstack_alloc (obstack, bits / 8);
10857 store_unsigned_integer (bytes, bits / 8, byte_order, l);
10864 /* Read a constant value from an attribute. Either set *VALUE, or if
10865 the value does not fit in *VALUE, set *BYTES - either already
10866 allocated on the objfile obstack, or newly allocated on OBSTACK,
10867 or, set *BATON, if we translated the constant to a location
10871 dwarf2_const_value_attr (struct attribute *attr, struct type *type,
10872 const char *name, struct obstack *obstack,
10873 struct dwarf2_cu *cu,
10874 long *value, gdb_byte **bytes,
10875 struct dwarf2_locexpr_baton **baton)
10877 struct objfile *objfile = cu->objfile;
10878 struct comp_unit_head *cu_header = &cu->header;
10879 struct dwarf_block *blk;
10880 enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ?
10881 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE);
10887 switch (attr->form)
10893 if (TYPE_LENGTH (type) != cu_header->addr_size)
10894 dwarf2_const_value_length_mismatch_complaint (name,
10895 cu_header->addr_size,
10896 TYPE_LENGTH (type));
10897 /* Symbols of this form are reasonably rare, so we just
10898 piggyback on the existing location code rather than writing
10899 a new implementation of symbol_computed_ops. */
10900 *baton = obstack_alloc (&objfile->objfile_obstack,
10901 sizeof (struct dwarf2_locexpr_baton));
10902 (*baton)->per_cu = cu->per_cu;
10903 gdb_assert ((*baton)->per_cu);
10905 (*baton)->size = 2 + cu_header->addr_size;
10906 data = obstack_alloc (&objfile->objfile_obstack, (*baton)->size);
10907 (*baton)->data = data;
10909 data[0] = DW_OP_addr;
10910 store_unsigned_integer (&data[1], cu_header->addr_size,
10911 byte_order, DW_ADDR (attr));
10912 data[cu_header->addr_size + 1] = DW_OP_stack_value;
10915 case DW_FORM_string:
10917 /* DW_STRING is already allocated on the objfile obstack, point
10919 *bytes = (gdb_byte *) DW_STRING (attr);
10921 case DW_FORM_block1:
10922 case DW_FORM_block2:
10923 case DW_FORM_block4:
10924 case DW_FORM_block:
10925 case DW_FORM_exprloc:
10926 blk = DW_BLOCK (attr);
10927 if (TYPE_LENGTH (type) != blk->size)
10928 dwarf2_const_value_length_mismatch_complaint (name, blk->size,
10929 TYPE_LENGTH (type));
10930 *bytes = blk->data;
10933 /* The DW_AT_const_value attributes are supposed to carry the
10934 symbol's value "represented as it would be on the target
10935 architecture." By the time we get here, it's already been
10936 converted to host endianness, so we just need to sign- or
10937 zero-extend it as appropriate. */
10938 case DW_FORM_data1:
10939 *bytes = dwarf2_const_value_data (attr, type, name, obstack, cu, value, 8);
10941 case DW_FORM_data2:
10942 *bytes = dwarf2_const_value_data (attr, type, name, obstack, cu, value, 16);
10944 case DW_FORM_data4:
10945 *bytes = dwarf2_const_value_data (attr, type, name, obstack, cu, value, 32);
10947 case DW_FORM_data8:
10948 *bytes = dwarf2_const_value_data (attr, type, name, obstack, cu, value, 64);
10951 case DW_FORM_sdata:
10952 *value = DW_SND (attr);
10955 case DW_FORM_udata:
10956 *value = DW_UNSND (attr);
10960 complaint (&symfile_complaints,
10961 _("unsupported const value attribute form: '%s'"),
10962 dwarf_form_name (attr->form));
10969 /* Copy constant value from an attribute to a symbol. */
10972 dwarf2_const_value (struct attribute *attr, struct symbol *sym,
10973 struct dwarf2_cu *cu)
10975 struct objfile *objfile = cu->objfile;
10976 struct comp_unit_head *cu_header = &cu->header;
10979 struct dwarf2_locexpr_baton *baton;
10981 dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym),
10982 SYMBOL_PRINT_NAME (sym),
10983 &objfile->objfile_obstack, cu,
10984 &value, &bytes, &baton);
10988 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
10989 SYMBOL_LOCATION_BATON (sym) = baton;
10990 SYMBOL_CLASS (sym) = LOC_COMPUTED;
10992 else if (bytes != NULL)
10994 SYMBOL_VALUE_BYTES (sym) = bytes;
10995 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
10999 SYMBOL_VALUE (sym) = value;
11000 SYMBOL_CLASS (sym) = LOC_CONST;
11004 /* Return the type of the die in question using its DW_AT_type attribute. */
11006 static struct type *
11007 die_type (struct die_info *die, struct dwarf2_cu *cu)
11009 struct attribute *type_attr;
11011 type_attr = dwarf2_attr (die, DW_AT_type, cu);
11014 /* A missing DW_AT_type represents a void type. */
11015 return objfile_type (cu->objfile)->builtin_void;
11018 return lookup_die_type (die, type_attr, cu);
11021 /* True iff CU's producer generates GNAT Ada auxiliary information
11022 that allows to find parallel types through that information instead
11023 of having to do expensive parallel lookups by type name. */
11026 need_gnat_info (struct dwarf2_cu *cu)
11028 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
11029 of GNAT produces this auxiliary information, without any indication
11030 that it is produced. Part of enhancing the FSF version of GNAT
11031 to produce that information will be to put in place an indicator
11032 that we can use in order to determine whether the descriptive type
11033 info is available or not. One suggestion that has been made is
11034 to use a new attribute, attached to the CU die. For now, assume
11035 that the descriptive type info is not available. */
11039 /* Return the auxiliary type of the die in question using its
11040 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
11041 attribute is not present. */
11043 static struct type *
11044 die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu)
11046 struct attribute *type_attr;
11048 type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu);
11052 return lookup_die_type (die, type_attr, cu);
11055 /* If DIE has a descriptive_type attribute, then set the TYPE's
11056 descriptive type accordingly. */
11059 set_descriptive_type (struct type *type, struct die_info *die,
11060 struct dwarf2_cu *cu)
11062 struct type *descriptive_type = die_descriptive_type (die, cu);
11064 if (descriptive_type)
11066 ALLOCATE_GNAT_AUX_TYPE (type);
11067 TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type;
11071 /* Return the containing type of the die in question using its
11072 DW_AT_containing_type attribute. */
11074 static struct type *
11075 die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
11077 struct attribute *type_attr;
11079 type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
11081 error (_("Dwarf Error: Problem turning containing type into gdb type "
11082 "[in module %s]"), cu->objfile->name);
11084 return lookup_die_type (die, type_attr, cu);
11087 /* Look up the type of DIE in CU using its type attribute ATTR.
11088 If there is no type substitute an error marker. */
11090 static struct type *
11091 lookup_die_type (struct die_info *die, struct attribute *attr,
11092 struct dwarf2_cu *cu)
11094 struct type *this_type;
11096 /* First see if we have it cached. */
11098 if (is_ref_attr (attr))
11100 unsigned int offset = dwarf2_get_ref_die_offset (attr);
11102 this_type = get_die_type_at_offset (offset, cu->per_cu);
11104 else if (attr->form == DW_FORM_sig8)
11106 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
11107 struct dwarf2_cu *sig_cu;
11108 unsigned int offset;
11110 /* sig_type will be NULL if the signatured type is missing from
11112 if (sig_type == NULL)
11113 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
11114 "at 0x%x [in module %s]"),
11115 die->offset, cu->objfile->name);
11117 gdb_assert (sig_type->per_cu.from_debug_types);
11118 offset = sig_type->offset + sig_type->type_offset;
11119 this_type = get_die_type_at_offset (offset, &sig_type->per_cu);
11123 dump_die_for_error (die);
11124 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
11125 dwarf_attr_name (attr->name), cu->objfile->name);
11128 /* If not cached we need to read it in. */
11130 if (this_type == NULL)
11132 struct die_info *type_die;
11133 struct dwarf2_cu *type_cu = cu;
11135 type_die = follow_die_ref_or_sig (die, attr, &type_cu);
11136 /* If the type is cached, we should have found it above. */
11137 gdb_assert (get_die_type (type_die, type_cu) == NULL);
11138 this_type = read_type_die_1 (type_die, type_cu);
11141 /* If we still don't have a type use an error marker. */
11143 if (this_type == NULL)
11145 char *message, *saved;
11147 /* read_type_die already issued a complaint. */
11148 message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
11152 saved = obstack_copy0 (&cu->objfile->objfile_obstack,
11153 message, strlen (message));
11156 this_type = init_type (TYPE_CODE_ERROR, 0, 0, saved, cu->objfile);
11162 /* Return the type in DIE, CU.
11163 Returns NULL for invalid types.
11165 This first does a lookup in the appropriate type_hash table,
11166 and only reads the die in if necessary.
11168 NOTE: This can be called when reading in partial or full symbols. */
11170 static struct type *
11171 read_type_die (struct die_info *die, struct dwarf2_cu *cu)
11173 struct type *this_type;
11175 this_type = get_die_type (die, cu);
11179 return read_type_die_1 (die, cu);
11182 /* Read the type in DIE, CU.
11183 Returns NULL for invalid types. */
11185 static struct type *
11186 read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu)
11188 struct type *this_type = NULL;
11192 case DW_TAG_class_type:
11193 case DW_TAG_interface_type:
11194 case DW_TAG_structure_type:
11195 case DW_TAG_union_type:
11196 this_type = read_structure_type (die, cu);
11198 case DW_TAG_enumeration_type:
11199 this_type = read_enumeration_type (die, cu);
11201 case DW_TAG_subprogram:
11202 case DW_TAG_subroutine_type:
11203 case DW_TAG_inlined_subroutine:
11204 this_type = read_subroutine_type (die, cu);
11206 case DW_TAG_array_type:
11207 this_type = read_array_type (die, cu);
11209 case DW_TAG_set_type:
11210 this_type = read_set_type (die, cu);
11212 case DW_TAG_pointer_type:
11213 this_type = read_tag_pointer_type (die, cu);
11215 case DW_TAG_ptr_to_member_type:
11216 this_type = read_tag_ptr_to_member_type (die, cu);
11218 case DW_TAG_reference_type:
11219 this_type = read_tag_reference_type (die, cu);
11221 case DW_TAG_const_type:
11222 this_type = read_tag_const_type (die, cu);
11224 case DW_TAG_volatile_type:
11225 this_type = read_tag_volatile_type (die, cu);
11227 case DW_TAG_string_type:
11228 this_type = read_tag_string_type (die, cu);
11230 case DW_TAG_typedef:
11231 this_type = read_typedef (die, cu);
11233 case DW_TAG_subrange_type:
11234 this_type = read_subrange_type (die, cu);
11236 case DW_TAG_base_type:
11237 this_type = read_base_type (die, cu);
11239 case DW_TAG_unspecified_type:
11240 this_type = read_unspecified_type (die, cu);
11242 case DW_TAG_namespace:
11243 this_type = read_namespace_type (die, cu);
11245 case DW_TAG_module:
11246 this_type = read_module_type (die, cu);
11249 complaint (&symfile_complaints, _("unexpected tag in read_type_die: '%s'"),
11250 dwarf_tag_name (die->tag));
11257 /* Return the name of the namespace/class that DIE is defined within,
11258 or "" if we can't tell. The caller should not xfree the result.
11260 For example, if we're within the method foo() in the following
11270 then determine_prefix on foo's die will return "N::C". */
11273 determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
11275 struct die_info *parent, *spec_die;
11276 struct dwarf2_cu *spec_cu;
11277 struct type *parent_type;
11279 if (cu->language != language_cplus && cu->language != language_java
11280 && cu->language != language_fortran)
11283 /* We have to be careful in the presence of DW_AT_specification.
11284 For example, with GCC 3.4, given the code
11288 // Definition of N::foo.
11292 then we'll have a tree of DIEs like this:
11294 1: DW_TAG_compile_unit
11295 2: DW_TAG_namespace // N
11296 3: DW_TAG_subprogram // declaration of N::foo
11297 4: DW_TAG_subprogram // definition of N::foo
11298 DW_AT_specification // refers to die #3
11300 Thus, when processing die #4, we have to pretend that we're in
11301 the context of its DW_AT_specification, namely the contex of die
11304 spec_die = die_specification (die, &spec_cu);
11305 if (spec_die == NULL)
11306 parent = die->parent;
11309 parent = spec_die->parent;
11313 if (parent == NULL)
11315 else if (parent->building_fullname)
11318 const char *parent_name;
11320 /* It has been seen on RealView 2.2 built binaries,
11321 DW_TAG_template_type_param types actually _defined_ as
11322 children of the parent class:
11325 template class <class Enum> Class{};
11326 Class<enum E> class_e;
11328 1: DW_TAG_class_type (Class)
11329 2: DW_TAG_enumeration_type (E)
11330 3: DW_TAG_enumerator (enum1:0)
11331 3: DW_TAG_enumerator (enum2:1)
11333 2: DW_TAG_template_type_param
11334 DW_AT_type DW_FORM_ref_udata (E)
11336 Besides being broken debug info, it can put GDB into an
11337 infinite loop. Consider:
11339 When we're building the full name for Class<E>, we'll start
11340 at Class, and go look over its template type parameters,
11341 finding E. We'll then try to build the full name of E, and
11342 reach here. We're now trying to build the full name of E,
11343 and look over the parent DIE for containing scope. In the
11344 broken case, if we followed the parent DIE of E, we'd again
11345 find Class, and once again go look at its template type
11346 arguments, etc., etc. Simply don't consider such parent die
11347 as source-level parent of this die (it can't be, the language
11348 doesn't allow it), and break the loop here. */
11349 name = dwarf2_name (die, cu);
11350 parent_name = dwarf2_name (parent, cu);
11351 complaint (&symfile_complaints,
11352 _("template param type '%s' defined within parent '%s'"),
11353 name ? name : "<unknown>",
11354 parent_name ? parent_name : "<unknown>");
11358 switch (parent->tag)
11360 case DW_TAG_namespace:
11361 parent_type = read_type_die (parent, cu);
11362 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
11363 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
11364 Work around this problem here. */
11365 if (cu->language == language_cplus
11366 && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0)
11368 /* We give a name to even anonymous namespaces. */
11369 return TYPE_TAG_NAME (parent_type);
11370 case DW_TAG_class_type:
11371 case DW_TAG_interface_type:
11372 case DW_TAG_structure_type:
11373 case DW_TAG_union_type:
11374 case DW_TAG_module:
11375 parent_type = read_type_die (parent, cu);
11376 if (TYPE_TAG_NAME (parent_type) != NULL)
11377 return TYPE_TAG_NAME (parent_type);
11379 /* An anonymous structure is only allowed non-static data
11380 members; no typedefs, no member functions, et cetera.
11381 So it does not need a prefix. */
11384 return determine_prefix (parent, cu);
11388 /* Return a newly-allocated string formed by concatenating PREFIX and
11389 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
11390 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
11391 perform an obconcat, otherwise allocate storage for the result. The CU argument
11392 is used to determine the language and hence, the appropriate separator. */
11394 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
11397 typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
11398 int physname, struct dwarf2_cu *cu)
11400 const char *lead = "";
11403 if (suffix == NULL || suffix[0] == '\0' || prefix == NULL || prefix[0] == '\0')
11405 else if (cu->language == language_java)
11407 else if (cu->language == language_fortran && physname)
11409 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
11410 DW_AT_MIPS_linkage_name is preferred and used instead. */
11418 if (prefix == NULL)
11420 if (suffix == NULL)
11425 char *retval = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
11427 strcpy (retval, lead);
11428 strcat (retval, prefix);
11429 strcat (retval, sep);
11430 strcat (retval, suffix);
11435 /* We have an obstack. */
11436 return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL);
11440 /* Return sibling of die, NULL if no sibling. */
11442 static struct die_info *
11443 sibling_die (struct die_info *die)
11445 return die->sibling;
11448 /* Get name of a die, return NULL if not found. */
11451 dwarf2_canonicalize_name (char *name, struct dwarf2_cu *cu,
11452 struct obstack *obstack)
11454 if (name && cu->language == language_cplus)
11456 char *canon_name = cp_canonicalize_string (name);
11458 if (canon_name != NULL)
11460 if (strcmp (canon_name, name) != 0)
11461 name = obsavestring (canon_name, strlen (canon_name),
11463 xfree (canon_name);
11470 /* Get name of a die, return NULL if not found. */
11473 dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
11475 struct attribute *attr;
11477 attr = dwarf2_attr (die, DW_AT_name, cu);
11478 if (!attr || !DW_STRING (attr))
11483 case DW_TAG_compile_unit:
11484 /* Compilation units have a DW_AT_name that is a filename, not
11485 a source language identifier. */
11486 case DW_TAG_enumeration_type:
11487 case DW_TAG_enumerator:
11488 /* These tags always have simple identifiers already; no need
11489 to canonicalize them. */
11490 return DW_STRING (attr);
11492 case DW_TAG_subprogram:
11493 /* Java constructors will all be named "<init>", so return
11494 the class name when we see this special case. */
11495 if (cu->language == language_java
11496 && DW_STRING (attr) != NULL
11497 && strcmp (DW_STRING (attr), "<init>") == 0)
11499 struct dwarf2_cu *spec_cu = cu;
11500 struct die_info *spec_die;
11502 /* GCJ will output '<init>' for Java constructor names.
11503 For this special case, return the name of the parent class. */
11505 /* GCJ may output suprogram DIEs with AT_specification set.
11506 If so, use the name of the specified DIE. */
11507 spec_die = die_specification (die, &spec_cu);
11508 if (spec_die != NULL)
11509 return dwarf2_name (spec_die, spec_cu);
11514 if (die->tag == DW_TAG_class_type)
11515 return dwarf2_name (die, cu);
11517 while (die->tag != DW_TAG_compile_unit);
11521 case DW_TAG_class_type:
11522 case DW_TAG_interface_type:
11523 case DW_TAG_structure_type:
11524 case DW_TAG_union_type:
11525 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
11526 structures or unions. These were of the form "._%d" in GCC 4.1,
11527 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
11528 and GCC 4.4. We work around this problem by ignoring these. */
11529 if (strncmp (DW_STRING (attr), "._", 2) == 0
11530 || strncmp (DW_STRING (attr), "<anonymous", 10) == 0)
11538 if (!DW_STRING_IS_CANONICAL (attr))
11541 = dwarf2_canonicalize_name (DW_STRING (attr), cu,
11542 &cu->objfile->objfile_obstack);
11543 DW_STRING_IS_CANONICAL (attr) = 1;
11545 return DW_STRING (attr);
11548 /* Return the die that this die in an extension of, or NULL if there
11549 is none. *EXT_CU is the CU containing DIE on input, and the CU
11550 containing the return value on output. */
11552 static struct die_info *
11553 dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu)
11555 struct attribute *attr;
11557 attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
11561 return follow_die_ref (die, attr, ext_cu);
11564 /* Convert a DIE tag into its string name. */
11567 dwarf_tag_name (unsigned tag)
11571 case DW_TAG_padding:
11572 return "DW_TAG_padding";
11573 case DW_TAG_array_type:
11574 return "DW_TAG_array_type";
11575 case DW_TAG_class_type:
11576 return "DW_TAG_class_type";
11577 case DW_TAG_entry_point:
11578 return "DW_TAG_entry_point";
11579 case DW_TAG_enumeration_type:
11580 return "DW_TAG_enumeration_type";
11581 case DW_TAG_formal_parameter:
11582 return "DW_TAG_formal_parameter";
11583 case DW_TAG_imported_declaration:
11584 return "DW_TAG_imported_declaration";
11586 return "DW_TAG_label";
11587 case DW_TAG_lexical_block:
11588 return "DW_TAG_lexical_block";
11589 case DW_TAG_member:
11590 return "DW_TAG_member";
11591 case DW_TAG_pointer_type:
11592 return "DW_TAG_pointer_type";
11593 case DW_TAG_reference_type:
11594 return "DW_TAG_reference_type";
11595 case DW_TAG_compile_unit:
11596 return "DW_TAG_compile_unit";
11597 case DW_TAG_string_type:
11598 return "DW_TAG_string_type";
11599 case DW_TAG_structure_type:
11600 return "DW_TAG_structure_type";
11601 case DW_TAG_subroutine_type:
11602 return "DW_TAG_subroutine_type";
11603 case DW_TAG_typedef:
11604 return "DW_TAG_typedef";
11605 case DW_TAG_union_type:
11606 return "DW_TAG_union_type";
11607 case DW_TAG_unspecified_parameters:
11608 return "DW_TAG_unspecified_parameters";
11609 case DW_TAG_variant:
11610 return "DW_TAG_variant";
11611 case DW_TAG_common_block:
11612 return "DW_TAG_common_block";
11613 case DW_TAG_common_inclusion:
11614 return "DW_TAG_common_inclusion";
11615 case DW_TAG_inheritance:
11616 return "DW_TAG_inheritance";
11617 case DW_TAG_inlined_subroutine:
11618 return "DW_TAG_inlined_subroutine";
11619 case DW_TAG_module:
11620 return "DW_TAG_module";
11621 case DW_TAG_ptr_to_member_type:
11622 return "DW_TAG_ptr_to_member_type";
11623 case DW_TAG_set_type:
11624 return "DW_TAG_set_type";
11625 case DW_TAG_subrange_type:
11626 return "DW_TAG_subrange_type";
11627 case DW_TAG_with_stmt:
11628 return "DW_TAG_with_stmt";
11629 case DW_TAG_access_declaration:
11630 return "DW_TAG_access_declaration";
11631 case DW_TAG_base_type:
11632 return "DW_TAG_base_type";
11633 case DW_TAG_catch_block:
11634 return "DW_TAG_catch_block";
11635 case DW_TAG_const_type:
11636 return "DW_TAG_const_type";
11637 case DW_TAG_constant:
11638 return "DW_TAG_constant";
11639 case DW_TAG_enumerator:
11640 return "DW_TAG_enumerator";
11641 case DW_TAG_file_type:
11642 return "DW_TAG_file_type";
11643 case DW_TAG_friend:
11644 return "DW_TAG_friend";
11645 case DW_TAG_namelist:
11646 return "DW_TAG_namelist";
11647 case DW_TAG_namelist_item:
11648 return "DW_TAG_namelist_item";
11649 case DW_TAG_packed_type:
11650 return "DW_TAG_packed_type";
11651 case DW_TAG_subprogram:
11652 return "DW_TAG_subprogram";
11653 case DW_TAG_template_type_param:
11654 return "DW_TAG_template_type_param";
11655 case DW_TAG_template_value_param:
11656 return "DW_TAG_template_value_param";
11657 case DW_TAG_thrown_type:
11658 return "DW_TAG_thrown_type";
11659 case DW_TAG_try_block:
11660 return "DW_TAG_try_block";
11661 case DW_TAG_variant_part:
11662 return "DW_TAG_variant_part";
11663 case DW_TAG_variable:
11664 return "DW_TAG_variable";
11665 case DW_TAG_volatile_type:
11666 return "DW_TAG_volatile_type";
11667 case DW_TAG_dwarf_procedure:
11668 return "DW_TAG_dwarf_procedure";
11669 case DW_TAG_restrict_type:
11670 return "DW_TAG_restrict_type";
11671 case DW_TAG_interface_type:
11672 return "DW_TAG_interface_type";
11673 case DW_TAG_namespace:
11674 return "DW_TAG_namespace";
11675 case DW_TAG_imported_module:
11676 return "DW_TAG_imported_module";
11677 case DW_TAG_unspecified_type:
11678 return "DW_TAG_unspecified_type";
11679 case DW_TAG_partial_unit:
11680 return "DW_TAG_partial_unit";
11681 case DW_TAG_imported_unit:
11682 return "DW_TAG_imported_unit";
11683 case DW_TAG_condition:
11684 return "DW_TAG_condition";
11685 case DW_TAG_shared_type:
11686 return "DW_TAG_shared_type";
11687 case DW_TAG_type_unit:
11688 return "DW_TAG_type_unit";
11689 case DW_TAG_MIPS_loop:
11690 return "DW_TAG_MIPS_loop";
11691 case DW_TAG_HP_array_descriptor:
11692 return "DW_TAG_HP_array_descriptor";
11693 case DW_TAG_format_label:
11694 return "DW_TAG_format_label";
11695 case DW_TAG_function_template:
11696 return "DW_TAG_function_template";
11697 case DW_TAG_class_template:
11698 return "DW_TAG_class_template";
11699 case DW_TAG_GNU_BINCL:
11700 return "DW_TAG_GNU_BINCL";
11701 case DW_TAG_GNU_EINCL:
11702 return "DW_TAG_GNU_EINCL";
11703 case DW_TAG_upc_shared_type:
11704 return "DW_TAG_upc_shared_type";
11705 case DW_TAG_upc_strict_type:
11706 return "DW_TAG_upc_strict_type";
11707 case DW_TAG_upc_relaxed_type:
11708 return "DW_TAG_upc_relaxed_type";
11709 case DW_TAG_PGI_kanji_type:
11710 return "DW_TAG_PGI_kanji_type";
11711 case DW_TAG_PGI_interface_block:
11712 return "DW_TAG_PGI_interface_block";
11714 return "DW_TAG_<unknown>";
11718 /* Convert a DWARF attribute code into its string name. */
11721 dwarf_attr_name (unsigned attr)
11725 case DW_AT_sibling:
11726 return "DW_AT_sibling";
11727 case DW_AT_location:
11728 return "DW_AT_location";
11730 return "DW_AT_name";
11731 case DW_AT_ordering:
11732 return "DW_AT_ordering";
11733 case DW_AT_subscr_data:
11734 return "DW_AT_subscr_data";
11735 case DW_AT_byte_size:
11736 return "DW_AT_byte_size";
11737 case DW_AT_bit_offset:
11738 return "DW_AT_bit_offset";
11739 case DW_AT_bit_size:
11740 return "DW_AT_bit_size";
11741 case DW_AT_element_list:
11742 return "DW_AT_element_list";
11743 case DW_AT_stmt_list:
11744 return "DW_AT_stmt_list";
11746 return "DW_AT_low_pc";
11747 case DW_AT_high_pc:
11748 return "DW_AT_high_pc";
11749 case DW_AT_language:
11750 return "DW_AT_language";
11752 return "DW_AT_member";
11754 return "DW_AT_discr";
11755 case DW_AT_discr_value:
11756 return "DW_AT_discr_value";
11757 case DW_AT_visibility:
11758 return "DW_AT_visibility";
11760 return "DW_AT_import";
11761 case DW_AT_string_length:
11762 return "DW_AT_string_length";
11763 case DW_AT_common_reference:
11764 return "DW_AT_common_reference";
11765 case DW_AT_comp_dir:
11766 return "DW_AT_comp_dir";
11767 case DW_AT_const_value:
11768 return "DW_AT_const_value";
11769 case DW_AT_containing_type:
11770 return "DW_AT_containing_type";
11771 case DW_AT_default_value:
11772 return "DW_AT_default_value";
11774 return "DW_AT_inline";
11775 case DW_AT_is_optional:
11776 return "DW_AT_is_optional";
11777 case DW_AT_lower_bound:
11778 return "DW_AT_lower_bound";
11779 case DW_AT_producer:
11780 return "DW_AT_producer";
11781 case DW_AT_prototyped:
11782 return "DW_AT_prototyped";
11783 case DW_AT_return_addr:
11784 return "DW_AT_return_addr";
11785 case DW_AT_start_scope:
11786 return "DW_AT_start_scope";
11787 case DW_AT_bit_stride:
11788 return "DW_AT_bit_stride";
11789 case DW_AT_upper_bound:
11790 return "DW_AT_upper_bound";
11791 case DW_AT_abstract_origin:
11792 return "DW_AT_abstract_origin";
11793 case DW_AT_accessibility:
11794 return "DW_AT_accessibility";
11795 case DW_AT_address_class:
11796 return "DW_AT_address_class";
11797 case DW_AT_artificial:
11798 return "DW_AT_artificial";
11799 case DW_AT_base_types:
11800 return "DW_AT_base_types";
11801 case DW_AT_calling_convention:
11802 return "DW_AT_calling_convention";
11804 return "DW_AT_count";
11805 case DW_AT_data_member_location:
11806 return "DW_AT_data_member_location";
11807 case DW_AT_decl_column:
11808 return "DW_AT_decl_column";
11809 case DW_AT_decl_file:
11810 return "DW_AT_decl_file";
11811 case DW_AT_decl_line:
11812 return "DW_AT_decl_line";
11813 case DW_AT_declaration:
11814 return "DW_AT_declaration";
11815 case DW_AT_discr_list:
11816 return "DW_AT_discr_list";
11817 case DW_AT_encoding:
11818 return "DW_AT_encoding";
11819 case DW_AT_external:
11820 return "DW_AT_external";
11821 case DW_AT_frame_base:
11822 return "DW_AT_frame_base";
11824 return "DW_AT_friend";
11825 case DW_AT_identifier_case:
11826 return "DW_AT_identifier_case";
11827 case DW_AT_macro_info:
11828 return "DW_AT_macro_info";
11829 case DW_AT_namelist_items:
11830 return "DW_AT_namelist_items";
11831 case DW_AT_priority:
11832 return "DW_AT_priority";
11833 case DW_AT_segment:
11834 return "DW_AT_segment";
11835 case DW_AT_specification:
11836 return "DW_AT_specification";
11837 case DW_AT_static_link:
11838 return "DW_AT_static_link";
11840 return "DW_AT_type";
11841 case DW_AT_use_location:
11842 return "DW_AT_use_location";
11843 case DW_AT_variable_parameter:
11844 return "DW_AT_variable_parameter";
11845 case DW_AT_virtuality:
11846 return "DW_AT_virtuality";
11847 case DW_AT_vtable_elem_location:
11848 return "DW_AT_vtable_elem_location";
11849 /* DWARF 3 values. */
11850 case DW_AT_allocated:
11851 return "DW_AT_allocated";
11852 case DW_AT_associated:
11853 return "DW_AT_associated";
11854 case DW_AT_data_location:
11855 return "DW_AT_data_location";
11856 case DW_AT_byte_stride:
11857 return "DW_AT_byte_stride";
11858 case DW_AT_entry_pc:
11859 return "DW_AT_entry_pc";
11860 case DW_AT_use_UTF8:
11861 return "DW_AT_use_UTF8";
11862 case DW_AT_extension:
11863 return "DW_AT_extension";
11865 return "DW_AT_ranges";
11866 case DW_AT_trampoline:
11867 return "DW_AT_trampoline";
11868 case DW_AT_call_column:
11869 return "DW_AT_call_column";
11870 case DW_AT_call_file:
11871 return "DW_AT_call_file";
11872 case DW_AT_call_line:
11873 return "DW_AT_call_line";
11874 case DW_AT_description:
11875 return "DW_AT_description";
11876 case DW_AT_binary_scale:
11877 return "DW_AT_binary_scale";
11878 case DW_AT_decimal_scale:
11879 return "DW_AT_decimal_scale";
11881 return "DW_AT_small";
11882 case DW_AT_decimal_sign:
11883 return "DW_AT_decimal_sign";
11884 case DW_AT_digit_count:
11885 return "DW_AT_digit_count";
11886 case DW_AT_picture_string:
11887 return "DW_AT_picture_string";
11888 case DW_AT_mutable:
11889 return "DW_AT_mutable";
11890 case DW_AT_threads_scaled:
11891 return "DW_AT_threads_scaled";
11892 case DW_AT_explicit:
11893 return "DW_AT_explicit";
11894 case DW_AT_object_pointer:
11895 return "DW_AT_object_pointer";
11896 case DW_AT_endianity:
11897 return "DW_AT_endianity";
11898 case DW_AT_elemental:
11899 return "DW_AT_elemental";
11901 return "DW_AT_pure";
11902 case DW_AT_recursive:
11903 return "DW_AT_recursive";
11904 /* DWARF 4 values. */
11905 case DW_AT_signature:
11906 return "DW_AT_signature";
11907 case DW_AT_linkage_name:
11908 return "DW_AT_linkage_name";
11909 /* SGI/MIPS extensions. */
11910 #ifdef MIPS /* collides with DW_AT_HP_block_index */
11911 case DW_AT_MIPS_fde:
11912 return "DW_AT_MIPS_fde";
11914 case DW_AT_MIPS_loop_begin:
11915 return "DW_AT_MIPS_loop_begin";
11916 case DW_AT_MIPS_tail_loop_begin:
11917 return "DW_AT_MIPS_tail_loop_begin";
11918 case DW_AT_MIPS_epilog_begin:
11919 return "DW_AT_MIPS_epilog_begin";
11920 case DW_AT_MIPS_loop_unroll_factor:
11921 return "DW_AT_MIPS_loop_unroll_factor";
11922 case DW_AT_MIPS_software_pipeline_depth:
11923 return "DW_AT_MIPS_software_pipeline_depth";
11924 case DW_AT_MIPS_linkage_name:
11925 return "DW_AT_MIPS_linkage_name";
11926 case DW_AT_MIPS_stride:
11927 return "DW_AT_MIPS_stride";
11928 case DW_AT_MIPS_abstract_name:
11929 return "DW_AT_MIPS_abstract_name";
11930 case DW_AT_MIPS_clone_origin:
11931 return "DW_AT_MIPS_clone_origin";
11932 case DW_AT_MIPS_has_inlines:
11933 return "DW_AT_MIPS_has_inlines";
11934 /* HP extensions. */
11935 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
11936 case DW_AT_HP_block_index:
11937 return "DW_AT_HP_block_index";
11939 case DW_AT_HP_unmodifiable:
11940 return "DW_AT_HP_unmodifiable";
11941 case DW_AT_HP_actuals_stmt_list:
11942 return "DW_AT_HP_actuals_stmt_list";
11943 case DW_AT_HP_proc_per_section:
11944 return "DW_AT_HP_proc_per_section";
11945 case DW_AT_HP_raw_data_ptr:
11946 return "DW_AT_HP_raw_data_ptr";
11947 case DW_AT_HP_pass_by_reference:
11948 return "DW_AT_HP_pass_by_reference";
11949 case DW_AT_HP_opt_level:
11950 return "DW_AT_HP_opt_level";
11951 case DW_AT_HP_prof_version_id:
11952 return "DW_AT_HP_prof_version_id";
11953 case DW_AT_HP_opt_flags:
11954 return "DW_AT_HP_opt_flags";
11955 case DW_AT_HP_cold_region_low_pc:
11956 return "DW_AT_HP_cold_region_low_pc";
11957 case DW_AT_HP_cold_region_high_pc:
11958 return "DW_AT_HP_cold_region_high_pc";
11959 case DW_AT_HP_all_variables_modifiable:
11960 return "DW_AT_HP_all_variables_modifiable";
11961 case DW_AT_HP_linkage_name:
11962 return "DW_AT_HP_linkage_name";
11963 case DW_AT_HP_prof_flags:
11964 return "DW_AT_HP_prof_flags";
11965 /* GNU extensions. */
11966 case DW_AT_sf_names:
11967 return "DW_AT_sf_names";
11968 case DW_AT_src_info:
11969 return "DW_AT_src_info";
11970 case DW_AT_mac_info:
11971 return "DW_AT_mac_info";
11972 case DW_AT_src_coords:
11973 return "DW_AT_src_coords";
11974 case DW_AT_body_begin:
11975 return "DW_AT_body_begin";
11976 case DW_AT_body_end:
11977 return "DW_AT_body_end";
11978 case DW_AT_GNU_vector:
11979 return "DW_AT_GNU_vector";
11980 case DW_AT_GNU_odr_signature:
11981 return "DW_AT_GNU_odr_signature";
11982 /* VMS extensions. */
11983 case DW_AT_VMS_rtnbeg_pd_address:
11984 return "DW_AT_VMS_rtnbeg_pd_address";
11985 /* UPC extension. */
11986 case DW_AT_upc_threads_scaled:
11987 return "DW_AT_upc_threads_scaled";
11988 /* PGI (STMicroelectronics) extensions. */
11989 case DW_AT_PGI_lbase:
11990 return "DW_AT_PGI_lbase";
11991 case DW_AT_PGI_soffset:
11992 return "DW_AT_PGI_soffset";
11993 case DW_AT_PGI_lstride:
11994 return "DW_AT_PGI_lstride";
11996 return "DW_AT_<unknown>";
12000 /* Convert a DWARF value form code into its string name. */
12003 dwarf_form_name (unsigned form)
12008 return "DW_FORM_addr";
12009 case DW_FORM_block2:
12010 return "DW_FORM_block2";
12011 case DW_FORM_block4:
12012 return "DW_FORM_block4";
12013 case DW_FORM_data2:
12014 return "DW_FORM_data2";
12015 case DW_FORM_data4:
12016 return "DW_FORM_data4";
12017 case DW_FORM_data8:
12018 return "DW_FORM_data8";
12019 case DW_FORM_string:
12020 return "DW_FORM_string";
12021 case DW_FORM_block:
12022 return "DW_FORM_block";
12023 case DW_FORM_block1:
12024 return "DW_FORM_block1";
12025 case DW_FORM_data1:
12026 return "DW_FORM_data1";
12028 return "DW_FORM_flag";
12029 case DW_FORM_sdata:
12030 return "DW_FORM_sdata";
12032 return "DW_FORM_strp";
12033 case DW_FORM_udata:
12034 return "DW_FORM_udata";
12035 case DW_FORM_ref_addr:
12036 return "DW_FORM_ref_addr";
12038 return "DW_FORM_ref1";
12040 return "DW_FORM_ref2";
12042 return "DW_FORM_ref4";
12044 return "DW_FORM_ref8";
12045 case DW_FORM_ref_udata:
12046 return "DW_FORM_ref_udata";
12047 case DW_FORM_indirect:
12048 return "DW_FORM_indirect";
12049 case DW_FORM_sec_offset:
12050 return "DW_FORM_sec_offset";
12051 case DW_FORM_exprloc:
12052 return "DW_FORM_exprloc";
12053 case DW_FORM_flag_present:
12054 return "DW_FORM_flag_present";
12056 return "DW_FORM_sig8";
12058 return "DW_FORM_<unknown>";
12062 /* Convert a DWARF stack opcode into its string name. */
12065 dwarf_stack_op_name (unsigned op, int def)
12070 return "DW_OP_addr";
12072 return "DW_OP_deref";
12073 case DW_OP_const1u:
12074 return "DW_OP_const1u";
12075 case DW_OP_const1s:
12076 return "DW_OP_const1s";
12077 case DW_OP_const2u:
12078 return "DW_OP_const2u";
12079 case DW_OP_const2s:
12080 return "DW_OP_const2s";
12081 case DW_OP_const4u:
12082 return "DW_OP_const4u";
12083 case DW_OP_const4s:
12084 return "DW_OP_const4s";
12085 case DW_OP_const8u:
12086 return "DW_OP_const8u";
12087 case DW_OP_const8s:
12088 return "DW_OP_const8s";
12090 return "DW_OP_constu";
12092 return "DW_OP_consts";
12094 return "DW_OP_dup";
12096 return "DW_OP_drop";
12098 return "DW_OP_over";
12100 return "DW_OP_pick";
12102 return "DW_OP_swap";
12104 return "DW_OP_rot";
12106 return "DW_OP_xderef";
12108 return "DW_OP_abs";
12110 return "DW_OP_and";
12112 return "DW_OP_div";
12114 return "DW_OP_minus";
12116 return "DW_OP_mod";
12118 return "DW_OP_mul";
12120 return "DW_OP_neg";
12122 return "DW_OP_not";
12126 return "DW_OP_plus";
12127 case DW_OP_plus_uconst:
12128 return "DW_OP_plus_uconst";
12130 return "DW_OP_shl";
12132 return "DW_OP_shr";
12134 return "DW_OP_shra";
12136 return "DW_OP_xor";
12138 return "DW_OP_bra";
12152 return "DW_OP_skip";
12154 return "DW_OP_lit0";
12156 return "DW_OP_lit1";
12158 return "DW_OP_lit2";
12160 return "DW_OP_lit3";
12162 return "DW_OP_lit4";
12164 return "DW_OP_lit5";
12166 return "DW_OP_lit6";
12168 return "DW_OP_lit7";
12170 return "DW_OP_lit8";
12172 return "DW_OP_lit9";
12174 return "DW_OP_lit10";
12176 return "DW_OP_lit11";
12178 return "DW_OP_lit12";
12180 return "DW_OP_lit13";
12182 return "DW_OP_lit14";
12184 return "DW_OP_lit15";
12186 return "DW_OP_lit16";
12188 return "DW_OP_lit17";
12190 return "DW_OP_lit18";
12192 return "DW_OP_lit19";
12194 return "DW_OP_lit20";
12196 return "DW_OP_lit21";
12198 return "DW_OP_lit22";
12200 return "DW_OP_lit23";
12202 return "DW_OP_lit24";
12204 return "DW_OP_lit25";
12206 return "DW_OP_lit26";
12208 return "DW_OP_lit27";
12210 return "DW_OP_lit28";
12212 return "DW_OP_lit29";
12214 return "DW_OP_lit30";
12216 return "DW_OP_lit31";
12218 return "DW_OP_reg0";
12220 return "DW_OP_reg1";
12222 return "DW_OP_reg2";
12224 return "DW_OP_reg3";
12226 return "DW_OP_reg4";
12228 return "DW_OP_reg5";
12230 return "DW_OP_reg6";
12232 return "DW_OP_reg7";
12234 return "DW_OP_reg8";
12236 return "DW_OP_reg9";
12238 return "DW_OP_reg10";
12240 return "DW_OP_reg11";
12242 return "DW_OP_reg12";
12244 return "DW_OP_reg13";
12246 return "DW_OP_reg14";
12248 return "DW_OP_reg15";
12250 return "DW_OP_reg16";
12252 return "DW_OP_reg17";
12254 return "DW_OP_reg18";
12256 return "DW_OP_reg19";
12258 return "DW_OP_reg20";
12260 return "DW_OP_reg21";
12262 return "DW_OP_reg22";
12264 return "DW_OP_reg23";
12266 return "DW_OP_reg24";
12268 return "DW_OP_reg25";
12270 return "DW_OP_reg26";
12272 return "DW_OP_reg27";
12274 return "DW_OP_reg28";
12276 return "DW_OP_reg29";
12278 return "DW_OP_reg30";
12280 return "DW_OP_reg31";
12282 return "DW_OP_breg0";
12284 return "DW_OP_breg1";
12286 return "DW_OP_breg2";
12288 return "DW_OP_breg3";
12290 return "DW_OP_breg4";
12292 return "DW_OP_breg5";
12294 return "DW_OP_breg6";
12296 return "DW_OP_breg7";
12298 return "DW_OP_breg8";
12300 return "DW_OP_breg9";
12302 return "DW_OP_breg10";
12304 return "DW_OP_breg11";
12306 return "DW_OP_breg12";
12308 return "DW_OP_breg13";
12310 return "DW_OP_breg14";
12312 return "DW_OP_breg15";
12314 return "DW_OP_breg16";
12316 return "DW_OP_breg17";
12318 return "DW_OP_breg18";
12320 return "DW_OP_breg19";
12322 return "DW_OP_breg20";
12324 return "DW_OP_breg21";
12326 return "DW_OP_breg22";
12328 return "DW_OP_breg23";
12330 return "DW_OP_breg24";
12332 return "DW_OP_breg25";
12334 return "DW_OP_breg26";
12336 return "DW_OP_breg27";
12338 return "DW_OP_breg28";
12340 return "DW_OP_breg29";
12342 return "DW_OP_breg30";
12344 return "DW_OP_breg31";
12346 return "DW_OP_regx";
12348 return "DW_OP_fbreg";
12350 return "DW_OP_bregx";
12352 return "DW_OP_piece";
12353 case DW_OP_deref_size:
12354 return "DW_OP_deref_size";
12355 case DW_OP_xderef_size:
12356 return "DW_OP_xderef_size";
12358 return "DW_OP_nop";
12359 /* DWARF 3 extensions. */
12360 case DW_OP_push_object_address:
12361 return "DW_OP_push_object_address";
12363 return "DW_OP_call2";
12365 return "DW_OP_call4";
12366 case DW_OP_call_ref:
12367 return "DW_OP_call_ref";
12368 case DW_OP_form_tls_address:
12369 return "DW_OP_form_tls_address";
12370 case DW_OP_call_frame_cfa:
12371 return "DW_OP_call_frame_cfa";
12372 case DW_OP_bit_piece:
12373 return "DW_OP_bit_piece";
12374 /* DWARF 4 extensions. */
12375 case DW_OP_implicit_value:
12376 return "DW_OP_implicit_value";
12377 case DW_OP_stack_value:
12378 return "DW_OP_stack_value";
12379 /* GNU extensions. */
12380 case DW_OP_GNU_push_tls_address:
12381 return "DW_OP_GNU_push_tls_address";
12382 case DW_OP_GNU_uninit:
12383 return "DW_OP_GNU_uninit";
12385 return def ? "OP_<unknown>" : NULL;
12390 dwarf_bool_name (unsigned mybool)
12398 /* Convert a DWARF type code into its string name. */
12401 dwarf_type_encoding_name (unsigned enc)
12406 return "DW_ATE_void";
12407 case DW_ATE_address:
12408 return "DW_ATE_address";
12409 case DW_ATE_boolean:
12410 return "DW_ATE_boolean";
12411 case DW_ATE_complex_float:
12412 return "DW_ATE_complex_float";
12414 return "DW_ATE_float";
12415 case DW_ATE_signed:
12416 return "DW_ATE_signed";
12417 case DW_ATE_signed_char:
12418 return "DW_ATE_signed_char";
12419 case DW_ATE_unsigned:
12420 return "DW_ATE_unsigned";
12421 case DW_ATE_unsigned_char:
12422 return "DW_ATE_unsigned_char";
12424 case DW_ATE_imaginary_float:
12425 return "DW_ATE_imaginary_float";
12426 case DW_ATE_packed_decimal:
12427 return "DW_ATE_packed_decimal";
12428 case DW_ATE_numeric_string:
12429 return "DW_ATE_numeric_string";
12430 case DW_ATE_edited:
12431 return "DW_ATE_edited";
12432 case DW_ATE_signed_fixed:
12433 return "DW_ATE_signed_fixed";
12434 case DW_ATE_unsigned_fixed:
12435 return "DW_ATE_unsigned_fixed";
12436 case DW_ATE_decimal_float:
12437 return "DW_ATE_decimal_float";
12440 return "DW_ATE_UTF";
12441 /* HP extensions. */
12442 case DW_ATE_HP_float80:
12443 return "DW_ATE_HP_float80";
12444 case DW_ATE_HP_complex_float80:
12445 return "DW_ATE_HP_complex_float80";
12446 case DW_ATE_HP_float128:
12447 return "DW_ATE_HP_float128";
12448 case DW_ATE_HP_complex_float128:
12449 return "DW_ATE_HP_complex_float128";
12450 case DW_ATE_HP_floathpintel:
12451 return "DW_ATE_HP_floathpintel";
12452 case DW_ATE_HP_imaginary_float80:
12453 return "DW_ATE_HP_imaginary_float80";
12454 case DW_ATE_HP_imaginary_float128:
12455 return "DW_ATE_HP_imaginary_float128";
12457 return "DW_ATE_<unknown>";
12461 /* Convert a DWARF call frame info operation to its string name. */
12465 dwarf_cfi_name (unsigned cfi_opc)
12469 case DW_CFA_advance_loc:
12470 return "DW_CFA_advance_loc";
12471 case DW_CFA_offset:
12472 return "DW_CFA_offset";
12473 case DW_CFA_restore:
12474 return "DW_CFA_restore";
12476 return "DW_CFA_nop";
12477 case DW_CFA_set_loc:
12478 return "DW_CFA_set_loc";
12479 case DW_CFA_advance_loc1:
12480 return "DW_CFA_advance_loc1";
12481 case DW_CFA_advance_loc2:
12482 return "DW_CFA_advance_loc2";
12483 case DW_CFA_advance_loc4:
12484 return "DW_CFA_advance_loc4";
12485 case DW_CFA_offset_extended:
12486 return "DW_CFA_offset_extended";
12487 case DW_CFA_restore_extended:
12488 return "DW_CFA_restore_extended";
12489 case DW_CFA_undefined:
12490 return "DW_CFA_undefined";
12491 case DW_CFA_same_value:
12492 return "DW_CFA_same_value";
12493 case DW_CFA_register:
12494 return "DW_CFA_register";
12495 case DW_CFA_remember_state:
12496 return "DW_CFA_remember_state";
12497 case DW_CFA_restore_state:
12498 return "DW_CFA_restore_state";
12499 case DW_CFA_def_cfa:
12500 return "DW_CFA_def_cfa";
12501 case DW_CFA_def_cfa_register:
12502 return "DW_CFA_def_cfa_register";
12503 case DW_CFA_def_cfa_offset:
12504 return "DW_CFA_def_cfa_offset";
12506 case DW_CFA_def_cfa_expression:
12507 return "DW_CFA_def_cfa_expression";
12508 case DW_CFA_expression:
12509 return "DW_CFA_expression";
12510 case DW_CFA_offset_extended_sf:
12511 return "DW_CFA_offset_extended_sf";
12512 case DW_CFA_def_cfa_sf:
12513 return "DW_CFA_def_cfa_sf";
12514 case DW_CFA_def_cfa_offset_sf:
12515 return "DW_CFA_def_cfa_offset_sf";
12516 case DW_CFA_val_offset:
12517 return "DW_CFA_val_offset";
12518 case DW_CFA_val_offset_sf:
12519 return "DW_CFA_val_offset_sf";
12520 case DW_CFA_val_expression:
12521 return "DW_CFA_val_expression";
12522 /* SGI/MIPS specific. */
12523 case DW_CFA_MIPS_advance_loc8:
12524 return "DW_CFA_MIPS_advance_loc8";
12525 /* GNU extensions. */
12526 case DW_CFA_GNU_window_save:
12527 return "DW_CFA_GNU_window_save";
12528 case DW_CFA_GNU_args_size:
12529 return "DW_CFA_GNU_args_size";
12530 case DW_CFA_GNU_negative_offset_extended:
12531 return "DW_CFA_GNU_negative_offset_extended";
12533 return "DW_CFA_<unknown>";
12539 dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
12543 print_spaces (indent, f);
12544 fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n",
12545 dwarf_tag_name (die->tag), die->abbrev, die->offset);
12547 if (die->parent != NULL)
12549 print_spaces (indent, f);
12550 fprintf_unfiltered (f, " parent at offset: 0x%x\n",
12551 die->parent->offset);
12554 print_spaces (indent, f);
12555 fprintf_unfiltered (f, " has children: %s\n",
12556 dwarf_bool_name (die->child != NULL));
12558 print_spaces (indent, f);
12559 fprintf_unfiltered (f, " attributes:\n");
12561 for (i = 0; i < die->num_attrs; ++i)
12563 print_spaces (indent, f);
12564 fprintf_unfiltered (f, " %s (%s) ",
12565 dwarf_attr_name (die->attrs[i].name),
12566 dwarf_form_name (die->attrs[i].form));
12568 switch (die->attrs[i].form)
12570 case DW_FORM_ref_addr:
12572 fprintf_unfiltered (f, "address: ");
12573 fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f);
12575 case DW_FORM_block2:
12576 case DW_FORM_block4:
12577 case DW_FORM_block:
12578 case DW_FORM_block1:
12579 fprintf_unfiltered (f, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
12581 case DW_FORM_exprloc:
12582 fprintf_unfiltered (f, "expression: size %u",
12583 DW_BLOCK (&die->attrs[i])->size);
12588 fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)",
12589 (long) (DW_ADDR (&die->attrs[i])));
12591 case DW_FORM_data1:
12592 case DW_FORM_data2:
12593 case DW_FORM_data4:
12594 case DW_FORM_data8:
12595 case DW_FORM_udata:
12596 case DW_FORM_sdata:
12597 fprintf_unfiltered (f, "constant: %s",
12598 pulongest (DW_UNSND (&die->attrs[i])));
12600 case DW_FORM_sec_offset:
12601 fprintf_unfiltered (f, "section offset: %s",
12602 pulongest (DW_UNSND (&die->attrs[i])));
12605 if (DW_SIGNATURED_TYPE (&die->attrs[i]) != NULL)
12606 fprintf_unfiltered (f, "signatured type, offset: 0x%x",
12607 DW_SIGNATURED_TYPE (&die->attrs[i])->offset);
12609 fprintf_unfiltered (f, "signatured type, offset: unknown");
12611 case DW_FORM_string:
12613 fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)",
12614 DW_STRING (&die->attrs[i])
12615 ? DW_STRING (&die->attrs[i]) : "",
12616 DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not");
12619 if (DW_UNSND (&die->attrs[i]))
12620 fprintf_unfiltered (f, "flag: TRUE");
12622 fprintf_unfiltered (f, "flag: FALSE");
12624 case DW_FORM_flag_present:
12625 fprintf_unfiltered (f, "flag: TRUE");
12627 case DW_FORM_indirect:
12628 /* the reader will have reduced the indirect form to
12629 the "base form" so this form should not occur */
12630 fprintf_unfiltered (f, "unexpected attribute form: DW_FORM_indirect");
12633 fprintf_unfiltered (f, "unsupported attribute form: %d.",
12634 die->attrs[i].form);
12637 fprintf_unfiltered (f, "\n");
12642 dump_die_for_error (struct die_info *die)
12644 dump_die_shallow (gdb_stderr, 0, die);
12648 dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die)
12650 int indent = level * 4;
12652 gdb_assert (die != NULL);
12654 if (level >= max_level)
12657 dump_die_shallow (f, indent, die);
12659 if (die->child != NULL)
12661 print_spaces (indent, f);
12662 fprintf_unfiltered (f, " Children:");
12663 if (level + 1 < max_level)
12665 fprintf_unfiltered (f, "\n");
12666 dump_die_1 (f, level + 1, max_level, die->child);
12670 fprintf_unfiltered (f, " [not printed, max nesting level reached]\n");
12674 if (die->sibling != NULL && level > 0)
12676 dump_die_1 (f, level, max_level, die->sibling);
12680 /* This is called from the pdie macro in gdbinit.in.
12681 It's not static so gcc will keep a copy callable from gdb. */
12684 dump_die (struct die_info *die, int max_level)
12686 dump_die_1 (gdb_stdlog, 0, max_level, die);
12690 store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu)
12694 slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset, INSERT);
12700 is_ref_attr (struct attribute *attr)
12702 switch (attr->form)
12704 case DW_FORM_ref_addr:
12709 case DW_FORM_ref_udata:
12716 static unsigned int
12717 dwarf2_get_ref_die_offset (struct attribute *attr)
12719 if (is_ref_attr (attr))
12720 return DW_ADDR (attr);
12722 complaint (&symfile_complaints,
12723 _("unsupported die ref attribute form: '%s'"),
12724 dwarf_form_name (attr->form));
12728 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
12729 * the value held by the attribute is not constant. */
12732 dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
12734 if (attr->form == DW_FORM_sdata)
12735 return DW_SND (attr);
12736 else if (attr->form == DW_FORM_udata
12737 || attr->form == DW_FORM_data1
12738 || attr->form == DW_FORM_data2
12739 || attr->form == DW_FORM_data4
12740 || attr->form == DW_FORM_data8)
12741 return DW_UNSND (attr);
12744 complaint (&symfile_complaints, _("Attribute value is not a constant (%s)"),
12745 dwarf_form_name (attr->form));
12746 return default_value;
12750 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
12751 unit and add it to our queue.
12752 The result is non-zero if PER_CU was queued, otherwise the result is zero
12753 meaning either PER_CU is already queued or it is already loaded. */
12756 maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
12757 struct dwarf2_per_cu_data *per_cu)
12759 /* We may arrive here during partial symbol reading, if we need full
12760 DIEs to process an unusual case (e.g. template arguments). Do
12761 not queue PER_CU, just tell our caller to load its DIEs. */
12762 if (dwarf2_per_objfile->reading_partial_symbols)
12764 if (per_cu->cu == NULL || per_cu->cu->dies == NULL)
12769 /* Mark the dependence relation so that we don't flush PER_CU
12771 dwarf2_add_dependence (this_cu, per_cu);
12773 /* If it's already on the queue, we have nothing to do. */
12774 if (per_cu->queued)
12777 /* If the compilation unit is already loaded, just mark it as
12779 if (per_cu->cu != NULL)
12781 per_cu->cu->last_used = 0;
12785 /* Add it to the queue. */
12786 queue_comp_unit (per_cu, this_cu->objfile);
12791 /* Follow reference or signature attribute ATTR of SRC_DIE.
12792 On entry *REF_CU is the CU of SRC_DIE.
12793 On exit *REF_CU is the CU of the result. */
12795 static struct die_info *
12796 follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr,
12797 struct dwarf2_cu **ref_cu)
12799 struct die_info *die;
12801 if (is_ref_attr (attr))
12802 die = follow_die_ref (src_die, attr, ref_cu);
12803 else if (attr->form == DW_FORM_sig8)
12804 die = follow_die_sig (src_die, attr, ref_cu);
12807 dump_die_for_error (src_die);
12808 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
12809 (*ref_cu)->objfile->name);
12815 /* Follow reference OFFSET.
12816 On entry *REF_CU is the CU of the source die referencing OFFSET.
12817 On exit *REF_CU is the CU of the result.
12818 Returns NULL if OFFSET is invalid. */
12820 static struct die_info *
12821 follow_die_offset (unsigned int offset, struct dwarf2_cu **ref_cu)
12823 struct die_info temp_die;
12824 struct dwarf2_cu *target_cu, *cu = *ref_cu;
12826 gdb_assert (cu->per_cu != NULL);
12830 if (cu->per_cu->from_debug_types)
12832 /* .debug_types CUs cannot reference anything outside their CU.
12833 If they need to, they have to reference a signatured type via
12835 if (! offset_in_cu_p (&cu->header, offset))
12838 else if (! offset_in_cu_p (&cu->header, offset))
12840 struct dwarf2_per_cu_data *per_cu;
12842 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
12844 /* If necessary, add it to the queue and load its DIEs. */
12845 if (maybe_queue_comp_unit (cu, per_cu))
12846 load_full_comp_unit (per_cu, cu->objfile);
12848 target_cu = per_cu->cu;
12850 else if (cu->dies == NULL)
12852 /* We're loading full DIEs during partial symbol reading. */
12853 gdb_assert (dwarf2_per_objfile->reading_partial_symbols);
12854 load_full_comp_unit (cu->per_cu, cu->objfile);
12857 *ref_cu = target_cu;
12858 temp_die.offset = offset;
12859 return htab_find_with_hash (target_cu->die_hash, &temp_die, offset);
12862 /* Follow reference attribute ATTR of SRC_DIE.
12863 On entry *REF_CU is the CU of SRC_DIE.
12864 On exit *REF_CU is the CU of the result. */
12866 static struct die_info *
12867 follow_die_ref (struct die_info *src_die, struct attribute *attr,
12868 struct dwarf2_cu **ref_cu)
12870 unsigned int offset = dwarf2_get_ref_die_offset (attr);
12871 struct dwarf2_cu *cu = *ref_cu;
12872 struct die_info *die;
12874 die = follow_die_offset (offset, ref_cu);
12876 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
12877 "at 0x%x [in module %s]"),
12878 offset, src_die->offset, cu->objfile->name);
12883 /* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
12884 value is intended for DW_OP_call*. */
12886 struct dwarf2_locexpr_baton
12887 dwarf2_fetch_die_location_block (unsigned int offset,
12888 struct dwarf2_per_cu_data *per_cu)
12890 struct dwarf2_cu *cu = per_cu->cu;
12891 struct die_info *die;
12892 struct attribute *attr;
12893 struct dwarf2_locexpr_baton retval;
12895 die = follow_die_offset (offset, &cu);
12897 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
12898 offset, per_cu->cu->objfile->name);
12900 attr = dwarf2_attr (die, DW_AT_location, cu);
12903 /* DWARF: "If there is no such attribute, then there is no effect.". */
12905 retval.data = NULL;
12910 if (!attr_form_is_block (attr))
12911 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
12912 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
12913 offset, per_cu->cu->objfile->name);
12915 retval.data = DW_BLOCK (attr)->data;
12916 retval.size = DW_BLOCK (attr)->size;
12918 retval.per_cu = cu->per_cu;
12922 /* Follow the signature attribute ATTR in SRC_DIE.
12923 On entry *REF_CU is the CU of SRC_DIE.
12924 On exit *REF_CU is the CU of the result. */
12926 static struct die_info *
12927 follow_die_sig (struct die_info *src_die, struct attribute *attr,
12928 struct dwarf2_cu **ref_cu)
12930 struct objfile *objfile = (*ref_cu)->objfile;
12931 struct die_info temp_die;
12932 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
12933 struct dwarf2_cu *sig_cu;
12934 struct die_info *die;
12936 /* sig_type will be NULL if the signatured type is missing from
12938 if (sig_type == NULL)
12939 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
12940 "at 0x%x [in module %s]"),
12941 src_die->offset, objfile->name);
12943 /* If necessary, add it to the queue and load its DIEs. */
12945 if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu))
12946 read_signatured_type (objfile, sig_type);
12948 gdb_assert (sig_type->per_cu.cu != NULL);
12950 sig_cu = sig_type->per_cu.cu;
12951 temp_die.offset = sig_cu->header.offset + sig_type->type_offset;
12952 die = htab_find_with_hash (sig_cu->die_hash, &temp_die, temp_die.offset);
12959 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
12960 "at 0x%x [in module %s]"),
12961 sig_type->type_offset, src_die->offset, objfile->name);
12964 /* Given an offset of a signatured type, return its signatured_type. */
12966 static struct signatured_type *
12967 lookup_signatured_type_at_offset (struct objfile *objfile, unsigned int offset)
12969 gdb_byte *info_ptr = dwarf2_per_objfile->types.buffer + offset;
12970 unsigned int length, initial_length_size;
12971 unsigned int sig_offset;
12972 struct signatured_type find_entry, *type_sig;
12974 length = read_initial_length (objfile->obfd, info_ptr, &initial_length_size);
12975 sig_offset = (initial_length_size
12977 + (initial_length_size == 4 ? 4 : 8) /*debug_abbrev_offset*/
12978 + 1 /*address_size*/);
12979 find_entry.signature = bfd_get_64 (objfile->obfd, info_ptr + sig_offset);
12980 type_sig = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
12982 /* This is only used to lookup previously recorded types.
12983 If we didn't find it, it's our bug. */
12984 gdb_assert (type_sig != NULL);
12985 gdb_assert (offset == type_sig->offset);
12990 /* Read in signatured type at OFFSET and build its CU and die(s). */
12993 read_signatured_type_at_offset (struct objfile *objfile,
12994 unsigned int offset)
12996 struct signatured_type *type_sig;
12998 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
13000 /* We have the section offset, but we need the signature to do the
13001 hash table lookup. */
13002 type_sig = lookup_signatured_type_at_offset (objfile, offset);
13004 gdb_assert (type_sig->per_cu.cu == NULL);
13006 read_signatured_type (objfile, type_sig);
13008 gdb_assert (type_sig->per_cu.cu != NULL);
13011 /* Read in a signatured type and build its CU and DIEs. */
13014 read_signatured_type (struct objfile *objfile,
13015 struct signatured_type *type_sig)
13017 gdb_byte *types_ptr;
13018 struct die_reader_specs reader_specs;
13019 struct dwarf2_cu *cu;
13020 ULONGEST signature;
13021 struct cleanup *back_to, *free_cu_cleanup;
13022 struct attribute *attr;
13024 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
13025 types_ptr = dwarf2_per_objfile->types.buffer + type_sig->offset;
13027 gdb_assert (type_sig->per_cu.cu == NULL);
13029 cu = xmalloc (sizeof (struct dwarf2_cu));
13030 memset (cu, 0, sizeof (struct dwarf2_cu));
13031 obstack_init (&cu->comp_unit_obstack);
13032 cu->objfile = objfile;
13033 type_sig->per_cu.cu = cu;
13034 cu->per_cu = &type_sig->per_cu;
13036 /* If an error occurs while loading, release our storage. */
13037 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
13039 types_ptr = read_type_comp_unit_head (&cu->header, &signature,
13040 types_ptr, objfile->obfd);
13041 gdb_assert (signature == type_sig->signature);
13044 = htab_create_alloc_ex (cu->header.length / 12,
13048 &cu->comp_unit_obstack,
13049 hashtab_obstack_allocate,
13050 dummy_obstack_deallocate);
13052 dwarf2_read_abbrevs (cu->objfile->obfd, cu);
13053 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
13055 init_cu_die_reader (&reader_specs, cu);
13057 cu->dies = read_die_and_children (&reader_specs, types_ptr, &types_ptr,
13060 /* We try not to read any attributes in this function, because not
13061 all objfiles needed for references have been loaded yet, and symbol
13062 table processing isn't initialized. But we have to set the CU language,
13063 or we won't be able to build types correctly. */
13064 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
13066 set_cu_language (DW_UNSND (attr), cu);
13068 set_cu_language (language_minimal, cu);
13070 do_cleanups (back_to);
13072 /* We've successfully allocated this compilation unit. Let our caller
13073 clean it up when finished with it. */
13074 discard_cleanups (free_cu_cleanup);
13076 type_sig->per_cu.cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
13077 dwarf2_per_objfile->read_in_chain = &type_sig->per_cu;
13080 /* Decode simple location descriptions.
13081 Given a pointer to a dwarf block that defines a location, compute
13082 the location and return the value.
13084 NOTE drow/2003-11-18: This function is called in two situations
13085 now: for the address of static or global variables (partial symbols
13086 only) and for offsets into structures which are expected to be
13087 (more or less) constant. The partial symbol case should go away,
13088 and only the constant case should remain. That will let this
13089 function complain more accurately. A few special modes are allowed
13090 without complaint for global variables (for instance, global
13091 register values and thread-local values).
13093 A location description containing no operations indicates that the
13094 object is optimized out. The return value is 0 for that case.
13095 FIXME drow/2003-11-16: No callers check for this case any more; soon all
13096 callers will only want a very basic result and this can become a
13099 Note that stack[0] is unused except as a default error return.
13100 Note that stack overflow is not yet handled. */
13103 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
13105 struct objfile *objfile = cu->objfile;
13107 int size = blk->size;
13108 gdb_byte *data = blk->data;
13109 CORE_ADDR stack[64];
13111 unsigned int bytes_read, unsnd;
13155 stack[++stacki] = op - DW_OP_lit0;
13190 stack[++stacki] = op - DW_OP_reg0;
13192 dwarf2_complex_location_expr_complaint ();
13196 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
13198 stack[++stacki] = unsnd;
13200 dwarf2_complex_location_expr_complaint ();
13204 stack[++stacki] = read_address (objfile->obfd, &data[i],
13209 case DW_OP_const1u:
13210 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
13214 case DW_OP_const1s:
13215 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
13219 case DW_OP_const2u:
13220 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
13224 case DW_OP_const2s:
13225 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
13229 case DW_OP_const4u:
13230 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
13234 case DW_OP_const4s:
13235 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
13240 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
13246 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
13251 stack[stacki + 1] = stack[stacki];
13256 stack[stacki - 1] += stack[stacki];
13260 case DW_OP_plus_uconst:
13261 stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
13266 stack[stacki - 1] -= stack[stacki];
13271 /* If we're not the last op, then we definitely can't encode
13272 this using GDB's address_class enum. This is valid for partial
13273 global symbols, although the variable's address will be bogus
13276 dwarf2_complex_location_expr_complaint ();
13279 case DW_OP_GNU_push_tls_address:
13280 /* The top of the stack has the offset from the beginning
13281 of the thread control block at which the variable is located. */
13282 /* Nothing should follow this operator, so the top of stack would
13284 /* This is valid for partial global symbols, but the variable's
13285 address will be bogus in the psymtab. */
13287 dwarf2_complex_location_expr_complaint ();
13290 case DW_OP_GNU_uninit:
13294 complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
13295 dwarf_stack_op_name (op, 1));
13296 return (stack[stacki]);
13299 return (stack[stacki]);
13302 /* memory allocation interface */
13304 static struct dwarf_block *
13305 dwarf_alloc_block (struct dwarf2_cu *cu)
13307 struct dwarf_block *blk;
13309 blk = (struct dwarf_block *)
13310 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
13314 static struct abbrev_info *
13315 dwarf_alloc_abbrev (struct dwarf2_cu *cu)
13317 struct abbrev_info *abbrev;
13319 abbrev = (struct abbrev_info *)
13320 obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info));
13321 memset (abbrev, 0, sizeof (struct abbrev_info));
13325 static struct die_info *
13326 dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs)
13328 struct die_info *die;
13329 size_t size = sizeof (struct die_info);
13332 size += (num_attrs - 1) * sizeof (struct attribute);
13334 die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size);
13335 memset (die, 0, sizeof (struct die_info));
13340 /* Macro support. */
13343 /* Return the full name of file number I in *LH's file name table.
13344 Use COMP_DIR as the name of the current directory of the
13345 compilation. The result is allocated using xmalloc; the caller is
13346 responsible for freeing it. */
13348 file_full_name (int file, struct line_header *lh, const char *comp_dir)
13350 /* Is the file number a valid index into the line header's file name
13351 table? Remember that file numbers start with one, not zero. */
13352 if (1 <= file && file <= lh->num_file_names)
13354 struct file_entry *fe = &lh->file_names[file - 1];
13356 if (IS_ABSOLUTE_PATH (fe->name))
13357 return xstrdup (fe->name);
13365 dir = lh->include_dirs[fe->dir_index - 1];
13371 dir_len = strlen (dir);
13372 full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
13373 strcpy (full_name, dir);
13374 full_name[dir_len] = '/';
13375 strcpy (full_name + dir_len + 1, fe->name);
13379 return xstrdup (fe->name);
13384 /* The compiler produced a bogus file number. We can at least
13385 record the macro definitions made in the file, even if we
13386 won't be able to find the file by name. */
13387 char fake_name[80];
13389 sprintf (fake_name, "<bad macro file number %d>", file);
13391 complaint (&symfile_complaints,
13392 _("bad file number in macro information (%d)"),
13395 return xstrdup (fake_name);
13400 static struct macro_source_file *
13401 macro_start_file (int file, int line,
13402 struct macro_source_file *current_file,
13403 const char *comp_dir,
13404 struct line_header *lh, struct objfile *objfile)
13406 /* The full name of this source file. */
13407 char *full_name = file_full_name (file, lh, comp_dir);
13409 /* We don't create a macro table for this compilation unit
13410 at all until we actually get a filename. */
13411 if (! pending_macros)
13412 pending_macros = new_macro_table (&objfile->objfile_obstack,
13413 objfile->macro_cache);
13415 if (! current_file)
13416 /* If we have no current file, then this must be the start_file
13417 directive for the compilation unit's main source file. */
13418 current_file = macro_set_main (pending_macros, full_name);
13420 current_file = macro_include (current_file, line, full_name);
13424 return current_file;
13428 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
13429 followed by a null byte. */
13431 copy_string (const char *buf, int len)
13433 char *s = xmalloc (len + 1);
13435 memcpy (s, buf, len);
13441 static const char *
13442 consume_improper_spaces (const char *p, const char *body)
13446 complaint (&symfile_complaints,
13447 _("macro definition contains spaces in formal argument list:\n`%s'"),
13459 parse_macro_definition (struct macro_source_file *file, int line,
13464 /* The body string takes one of two forms. For object-like macro
13465 definitions, it should be:
13467 <macro name> " " <definition>
13469 For function-like macro definitions, it should be:
13471 <macro name> "() " <definition>
13473 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
13475 Spaces may appear only where explicitly indicated, and in the
13478 The Dwarf 2 spec says that an object-like macro's name is always
13479 followed by a space, but versions of GCC around March 2002 omit
13480 the space when the macro's definition is the empty string.
13482 The Dwarf 2 spec says that there should be no spaces between the
13483 formal arguments in a function-like macro's formal argument list,
13484 but versions of GCC around March 2002 include spaces after the
13488 /* Find the extent of the macro name. The macro name is terminated
13489 by either a space or null character (for an object-like macro) or
13490 an opening paren (for a function-like macro). */
13491 for (p = body; *p; p++)
13492 if (*p == ' ' || *p == '(')
13495 if (*p == ' ' || *p == '\0')
13497 /* It's an object-like macro. */
13498 int name_len = p - body;
13499 char *name = copy_string (body, name_len);
13500 const char *replacement;
13503 replacement = body + name_len + 1;
13506 dwarf2_macro_malformed_definition_complaint (body);
13507 replacement = body + name_len;
13510 macro_define_object (file, line, name, replacement);
13514 else if (*p == '(')
13516 /* It's a function-like macro. */
13517 char *name = copy_string (body, p - body);
13520 char **argv = xmalloc (argv_size * sizeof (*argv));
13524 p = consume_improper_spaces (p, body);
13526 /* Parse the formal argument list. */
13527 while (*p && *p != ')')
13529 /* Find the extent of the current argument name. */
13530 const char *arg_start = p;
13532 while (*p && *p != ',' && *p != ')' && *p != ' ')
13535 if (! *p || p == arg_start)
13536 dwarf2_macro_malformed_definition_complaint (body);
13539 /* Make sure argv has room for the new argument. */
13540 if (argc >= argv_size)
13543 argv = xrealloc (argv, argv_size * sizeof (*argv));
13546 argv[argc++] = copy_string (arg_start, p - arg_start);
13549 p = consume_improper_spaces (p, body);
13551 /* Consume the comma, if present. */
13556 p = consume_improper_spaces (p, body);
13565 /* Perfectly formed definition, no complaints. */
13566 macro_define_function (file, line, name,
13567 argc, (const char **) argv,
13569 else if (*p == '\0')
13571 /* Complain, but do define it. */
13572 dwarf2_macro_malformed_definition_complaint (body);
13573 macro_define_function (file, line, name,
13574 argc, (const char **) argv,
13578 /* Just complain. */
13579 dwarf2_macro_malformed_definition_complaint (body);
13582 /* Just complain. */
13583 dwarf2_macro_malformed_definition_complaint (body);
13589 for (i = 0; i < argc; i++)
13595 dwarf2_macro_malformed_definition_complaint (body);
13600 dwarf_decode_macros (struct line_header *lh, unsigned int offset,
13601 char *comp_dir, bfd *abfd,
13602 struct dwarf2_cu *cu)
13604 gdb_byte *mac_ptr, *mac_end;
13605 struct macro_source_file *current_file = 0;
13606 enum dwarf_macinfo_record_type macinfo_type;
13607 int at_commandline;
13609 dwarf2_read_section (dwarf2_per_objfile->objfile,
13610 &dwarf2_per_objfile->macinfo);
13611 if (dwarf2_per_objfile->macinfo.buffer == NULL)
13613 complaint (&symfile_complaints, _("missing .debug_macinfo section"));
13617 /* First pass: Find the name of the base filename.
13618 This filename is needed in order to process all macros whose definition
13619 (or undefinition) comes from the command line. These macros are defined
13620 before the first DW_MACINFO_start_file entry, and yet still need to be
13621 associated to the base file.
13623 To determine the base file name, we scan the macro definitions until we
13624 reach the first DW_MACINFO_start_file entry. We then initialize
13625 CURRENT_FILE accordingly so that any macro definition found before the
13626 first DW_MACINFO_start_file can still be associated to the base file. */
13628 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
13629 mac_end = dwarf2_per_objfile->macinfo.buffer
13630 + dwarf2_per_objfile->macinfo.size;
13634 /* Do we at least have room for a macinfo type byte? */
13635 if (mac_ptr >= mac_end)
13637 /* Complaint is printed during the second pass as GDB will probably
13638 stop the first pass earlier upon finding DW_MACINFO_start_file. */
13642 macinfo_type = read_1_byte (abfd, mac_ptr);
13645 switch (macinfo_type)
13647 /* A zero macinfo type indicates the end of the macro
13652 case DW_MACINFO_define:
13653 case DW_MACINFO_undef:
13654 /* Only skip the data by MAC_PTR. */
13656 unsigned int bytes_read;
13658 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13659 mac_ptr += bytes_read;
13660 read_direct_string (abfd, mac_ptr, &bytes_read);
13661 mac_ptr += bytes_read;
13665 case DW_MACINFO_start_file:
13667 unsigned int bytes_read;
13670 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13671 mac_ptr += bytes_read;
13672 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13673 mac_ptr += bytes_read;
13675 current_file = macro_start_file (file, line, current_file, comp_dir,
13680 case DW_MACINFO_end_file:
13681 /* No data to skip by MAC_PTR. */
13684 case DW_MACINFO_vendor_ext:
13685 /* Only skip the data by MAC_PTR. */
13687 unsigned int bytes_read;
13689 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13690 mac_ptr += bytes_read;
13691 read_direct_string (abfd, mac_ptr, &bytes_read);
13692 mac_ptr += bytes_read;
13699 } while (macinfo_type != 0 && current_file == NULL);
13701 /* Second pass: Process all entries.
13703 Use the AT_COMMAND_LINE flag to determine whether we are still processing
13704 command-line macro definitions/undefinitions. This flag is unset when we
13705 reach the first DW_MACINFO_start_file entry. */
13707 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
13709 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
13710 GDB is still reading the definitions from command line. First
13711 DW_MACINFO_start_file will need to be ignored as it was already executed
13712 to create CURRENT_FILE for the main source holding also the command line
13713 definitions. On first met DW_MACINFO_start_file this flag is reset to
13714 normally execute all the remaining DW_MACINFO_start_file macinfos. */
13716 at_commandline = 1;
13720 /* Do we at least have room for a macinfo type byte? */
13721 if (mac_ptr >= mac_end)
13723 dwarf2_macros_too_long_complaint ();
13727 macinfo_type = read_1_byte (abfd, mac_ptr);
13730 switch (macinfo_type)
13732 /* A zero macinfo type indicates the end of the macro
13737 case DW_MACINFO_define:
13738 case DW_MACINFO_undef:
13740 unsigned int bytes_read;
13744 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13745 mac_ptr += bytes_read;
13746 body = read_direct_string (abfd, mac_ptr, &bytes_read);
13747 mac_ptr += bytes_read;
13749 if (! current_file)
13751 /* DWARF violation as no main source is present. */
13752 complaint (&symfile_complaints,
13753 _("debug info with no main source gives macro %s "
13755 macinfo_type == DW_MACINFO_define ?
13757 macinfo_type == DW_MACINFO_undef ?
13758 _("undefinition") :
13759 _("something-or-other"), line, body);
13762 if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
13763 complaint (&symfile_complaints,
13764 _("debug info gives %s macro %s with %s line %d: %s"),
13765 at_commandline ? _("command-line") : _("in-file"),
13766 macinfo_type == DW_MACINFO_define ?
13768 macinfo_type == DW_MACINFO_undef ?
13769 _("undefinition") :
13770 _("something-or-other"),
13771 line == 0 ? _("zero") : _("non-zero"), line, body);
13773 if (macinfo_type == DW_MACINFO_define)
13774 parse_macro_definition (current_file, line, body);
13775 else if (macinfo_type == DW_MACINFO_undef)
13776 macro_undef (current_file, line, body);
13780 case DW_MACINFO_start_file:
13782 unsigned int bytes_read;
13785 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13786 mac_ptr += bytes_read;
13787 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13788 mac_ptr += bytes_read;
13790 if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
13791 complaint (&symfile_complaints,
13792 _("debug info gives source %d included "
13793 "from %s at %s line %d"),
13794 file, at_commandline ? _("command-line") : _("file"),
13795 line == 0 ? _("zero") : _("non-zero"), line);
13797 if (at_commandline)
13799 /* This DW_MACINFO_start_file was executed in the pass one. */
13800 at_commandline = 0;
13803 current_file = macro_start_file (file, line,
13804 current_file, comp_dir,
13809 case DW_MACINFO_end_file:
13810 if (! current_file)
13811 complaint (&symfile_complaints,
13812 _("macro debug info has an unmatched `close_file' directive"));
13815 current_file = current_file->included_by;
13816 if (! current_file)
13818 enum dwarf_macinfo_record_type next_type;
13820 /* GCC circa March 2002 doesn't produce the zero
13821 type byte marking the end of the compilation
13822 unit. Complain if it's not there, but exit no
13825 /* Do we at least have room for a macinfo type byte? */
13826 if (mac_ptr >= mac_end)
13828 dwarf2_macros_too_long_complaint ();
13832 /* We don't increment mac_ptr here, so this is just
13834 next_type = read_1_byte (abfd, mac_ptr);
13835 if (next_type != 0)
13836 complaint (&symfile_complaints,
13837 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
13844 case DW_MACINFO_vendor_ext:
13846 unsigned int bytes_read;
13850 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13851 mac_ptr += bytes_read;
13852 string = read_direct_string (abfd, mac_ptr, &bytes_read);
13853 mac_ptr += bytes_read;
13855 /* We don't recognize any vendor extensions. */
13859 } while (macinfo_type != 0);
13862 /* Check if the attribute's form is a DW_FORM_block*
13863 if so return true else false. */
13865 attr_form_is_block (struct attribute *attr)
13867 return (attr == NULL ? 0 :
13868 attr->form == DW_FORM_block1
13869 || attr->form == DW_FORM_block2
13870 || attr->form == DW_FORM_block4
13871 || attr->form == DW_FORM_block
13872 || attr->form == DW_FORM_exprloc);
13875 /* Return non-zero if ATTR's value is a section offset --- classes
13876 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
13877 You may use DW_UNSND (attr) to retrieve such offsets.
13879 Section 7.5.4, "Attribute Encodings", explains that no attribute
13880 may have a value that belongs to more than one of these classes; it
13881 would be ambiguous if we did, because we use the same forms for all
13884 attr_form_is_section_offset (struct attribute *attr)
13886 return (attr->form == DW_FORM_data4
13887 || attr->form == DW_FORM_data8
13888 || attr->form == DW_FORM_sec_offset);
13892 /* Return non-zero if ATTR's value falls in the 'constant' class, or
13893 zero otherwise. When this function returns true, you can apply
13894 dwarf2_get_attr_constant_value to it.
13896 However, note that for some attributes you must check
13897 attr_form_is_section_offset before using this test. DW_FORM_data4
13898 and DW_FORM_data8 are members of both the constant class, and of
13899 the classes that contain offsets into other debug sections
13900 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
13901 that, if an attribute's can be either a constant or one of the
13902 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
13903 taken as section offsets, not constants. */
13905 attr_form_is_constant (struct attribute *attr)
13907 switch (attr->form)
13909 case DW_FORM_sdata:
13910 case DW_FORM_udata:
13911 case DW_FORM_data1:
13912 case DW_FORM_data2:
13913 case DW_FORM_data4:
13914 case DW_FORM_data8:
13922 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
13923 struct dwarf2_cu *cu)
13925 if (attr_form_is_section_offset (attr)
13926 /* ".debug_loc" may not exist at all, or the offset may be outside
13927 the section. If so, fall through to the complaint in the
13929 && DW_UNSND (attr) < dwarf2_per_objfile->loc.size)
13931 struct dwarf2_loclist_baton *baton;
13933 baton = obstack_alloc (&cu->objfile->objfile_obstack,
13934 sizeof (struct dwarf2_loclist_baton));
13935 baton->per_cu = cu->per_cu;
13936 gdb_assert (baton->per_cu);
13938 dwarf2_read_section (dwarf2_per_objfile->objfile,
13939 &dwarf2_per_objfile->loc);
13941 /* We don't know how long the location list is, but make sure we
13942 don't run off the edge of the section. */
13943 baton->size = dwarf2_per_objfile->loc.size - DW_UNSND (attr);
13944 baton->data = dwarf2_per_objfile->loc.buffer + DW_UNSND (attr);
13945 baton->base_address = cu->base_address;
13946 if (cu->base_known == 0)
13947 complaint (&symfile_complaints,
13948 _("Location list used without specifying the CU base address."));
13950 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_loclist_funcs;
13951 SYMBOL_LOCATION_BATON (sym) = baton;
13955 struct dwarf2_locexpr_baton *baton;
13957 baton = obstack_alloc (&cu->objfile->objfile_obstack,
13958 sizeof (struct dwarf2_locexpr_baton));
13959 baton->per_cu = cu->per_cu;
13960 gdb_assert (baton->per_cu);
13962 if (attr_form_is_block (attr))
13964 /* Note that we're just copying the block's data pointer
13965 here, not the actual data. We're still pointing into the
13966 info_buffer for SYM's objfile; right now we never release
13967 that buffer, but when we do clean up properly this may
13969 baton->size = DW_BLOCK (attr)->size;
13970 baton->data = DW_BLOCK (attr)->data;
13974 dwarf2_invalid_attrib_class_complaint ("location description",
13975 SYMBOL_NATURAL_NAME (sym));
13977 baton->data = NULL;
13980 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
13981 SYMBOL_LOCATION_BATON (sym) = baton;
13985 /* Return the OBJFILE associated with the compilation unit CU. If CU
13986 came from a separate debuginfo file, then the master objfile is
13990 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu)
13992 struct objfile *objfile = per_cu->objfile;
13994 /* Return the master objfile, so that we can report and look up the
13995 correct file containing this variable. */
13996 if (objfile->separate_debug_objfile_backlink)
13997 objfile = objfile->separate_debug_objfile_backlink;
14002 /* Return the address size given in the compilation unit header for CU. */
14005 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu)
14008 return per_cu->cu->header.addr_size;
14011 /* If the CU is not currently read in, we re-read its header. */
14012 struct objfile *objfile = per_cu->objfile;
14013 struct dwarf2_per_objfile *per_objfile
14014 = objfile_data (objfile, dwarf2_objfile_data_key);
14015 gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
14016 struct comp_unit_head cu_header;
14018 memset (&cu_header, 0, sizeof cu_header);
14019 read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
14020 return cu_header.addr_size;
14024 /* Return the offset size given in the compilation unit header for CU. */
14027 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu)
14030 return per_cu->cu->header.offset_size;
14033 /* If the CU is not currently read in, we re-read its header. */
14034 struct objfile *objfile = per_cu->objfile;
14035 struct dwarf2_per_objfile *per_objfile
14036 = objfile_data (objfile, dwarf2_objfile_data_key);
14037 gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
14038 struct comp_unit_head cu_header;
14040 memset (&cu_header, 0, sizeof cu_header);
14041 read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
14042 return cu_header.offset_size;
14046 /* Return the text offset of the CU. The returned offset comes from
14047 this CU's objfile. If this objfile came from a separate debuginfo
14048 file, then the offset may be different from the corresponding
14049 offset in the parent objfile. */
14052 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu)
14054 struct objfile *objfile = per_cu->objfile;
14056 return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
14059 /* Locate the .debug_info compilation unit from CU's objfile which contains
14060 the DIE at OFFSET. Raises an error on failure. */
14062 static struct dwarf2_per_cu_data *
14063 dwarf2_find_containing_comp_unit (unsigned int offset,
14064 struct objfile *objfile)
14066 struct dwarf2_per_cu_data *this_cu;
14070 high = dwarf2_per_objfile->n_comp_units - 1;
14073 int mid = low + (high - low) / 2;
14075 if (dwarf2_per_objfile->all_comp_units[mid]->offset >= offset)
14080 gdb_assert (low == high);
14081 if (dwarf2_per_objfile->all_comp_units[low]->offset > offset)
14084 error (_("Dwarf Error: could not find partial DIE containing "
14085 "offset 0x%lx [in module %s]"),
14086 (long) offset, bfd_get_filename (objfile->obfd));
14088 gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset <= offset);
14089 return dwarf2_per_objfile->all_comp_units[low-1];
14093 this_cu = dwarf2_per_objfile->all_comp_units[low];
14094 if (low == dwarf2_per_objfile->n_comp_units - 1
14095 && offset >= this_cu->offset + this_cu->length)
14096 error (_("invalid dwarf2 offset %u"), offset);
14097 gdb_assert (offset < this_cu->offset + this_cu->length);
14102 /* Locate the compilation unit from OBJFILE which is located at exactly
14103 OFFSET. Raises an error on failure. */
14105 static struct dwarf2_per_cu_data *
14106 dwarf2_find_comp_unit (unsigned int offset, struct objfile *objfile)
14108 struct dwarf2_per_cu_data *this_cu;
14110 this_cu = dwarf2_find_containing_comp_unit (offset, objfile);
14111 if (this_cu->offset != offset)
14112 error (_("no compilation unit with offset %u."), offset);
14116 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
14118 static struct dwarf2_cu *
14119 alloc_one_comp_unit (struct objfile *objfile)
14121 struct dwarf2_cu *cu = xcalloc (1, sizeof (struct dwarf2_cu));
14122 cu->objfile = objfile;
14123 obstack_init (&cu->comp_unit_obstack);
14127 /* Release one cached compilation unit, CU. We unlink it from the tree
14128 of compilation units, but we don't remove it from the read_in_chain;
14129 the caller is responsible for that.
14130 NOTE: DATA is a void * because this function is also used as a
14131 cleanup routine. */
14134 free_one_comp_unit (void *data)
14136 struct dwarf2_cu *cu = data;
14138 if (cu->per_cu != NULL)
14139 cu->per_cu->cu = NULL;
14142 obstack_free (&cu->comp_unit_obstack, NULL);
14147 /* This cleanup function is passed the address of a dwarf2_cu on the stack
14148 when we're finished with it. We can't free the pointer itself, but be
14149 sure to unlink it from the cache. Also release any associated storage
14150 and perform cache maintenance.
14152 Only used during partial symbol parsing. */
14155 free_stack_comp_unit (void *data)
14157 struct dwarf2_cu *cu = data;
14159 obstack_free (&cu->comp_unit_obstack, NULL);
14160 cu->partial_dies = NULL;
14162 if (cu->per_cu != NULL)
14164 /* This compilation unit is on the stack in our caller, so we
14165 should not xfree it. Just unlink it. */
14166 cu->per_cu->cu = NULL;
14169 /* If we had a per-cu pointer, then we may have other compilation
14170 units loaded, so age them now. */
14171 age_cached_comp_units ();
14175 /* Free all cached compilation units. */
14178 free_cached_comp_units (void *data)
14180 struct dwarf2_per_cu_data *per_cu, **last_chain;
14182 per_cu = dwarf2_per_objfile->read_in_chain;
14183 last_chain = &dwarf2_per_objfile->read_in_chain;
14184 while (per_cu != NULL)
14186 struct dwarf2_per_cu_data *next_cu;
14188 next_cu = per_cu->cu->read_in_chain;
14190 free_one_comp_unit (per_cu->cu);
14191 *last_chain = next_cu;
14197 /* Increase the age counter on each cached compilation unit, and free
14198 any that are too old. */
14201 age_cached_comp_units (void)
14203 struct dwarf2_per_cu_data *per_cu, **last_chain;
14205 dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
14206 per_cu = dwarf2_per_objfile->read_in_chain;
14207 while (per_cu != NULL)
14209 per_cu->cu->last_used ++;
14210 if (per_cu->cu->last_used <= dwarf2_max_cache_age)
14211 dwarf2_mark (per_cu->cu);
14212 per_cu = per_cu->cu->read_in_chain;
14215 per_cu = dwarf2_per_objfile->read_in_chain;
14216 last_chain = &dwarf2_per_objfile->read_in_chain;
14217 while (per_cu != NULL)
14219 struct dwarf2_per_cu_data *next_cu;
14221 next_cu = per_cu->cu->read_in_chain;
14223 if (!per_cu->cu->mark)
14225 free_one_comp_unit (per_cu->cu);
14226 *last_chain = next_cu;
14229 last_chain = &per_cu->cu->read_in_chain;
14235 /* Remove a single compilation unit from the cache. */
14238 free_one_cached_comp_unit (void *target_cu)
14240 struct dwarf2_per_cu_data *per_cu, **last_chain;
14242 per_cu = dwarf2_per_objfile->read_in_chain;
14243 last_chain = &dwarf2_per_objfile->read_in_chain;
14244 while (per_cu != NULL)
14246 struct dwarf2_per_cu_data *next_cu;
14248 next_cu = per_cu->cu->read_in_chain;
14250 if (per_cu->cu == target_cu)
14252 free_one_comp_unit (per_cu->cu);
14253 *last_chain = next_cu;
14257 last_chain = &per_cu->cu->read_in_chain;
14263 /* Release all extra memory associated with OBJFILE. */
14266 dwarf2_free_objfile (struct objfile *objfile)
14268 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
14270 if (dwarf2_per_objfile == NULL)
14273 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
14274 free_cached_comp_units (NULL);
14276 if (dwarf2_per_objfile->using_index)
14280 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
14283 struct dwarf2_per_cu_data *per_cu =
14284 dwarf2_per_objfile->all_comp_units[i];
14286 if (!per_cu->v.quick->lines)
14289 for (j = 0; j < per_cu->v.quick->lines->num_file_names; ++j)
14291 if (per_cu->v.quick->file_names)
14292 xfree ((void *) per_cu->v.quick->file_names[j]);
14293 if (per_cu->v.quick->full_names)
14294 xfree ((void *) per_cu->v.quick->full_names[j]);
14297 free_line_header (per_cu->v.quick->lines);
14301 /* Everything else should be on the objfile obstack. */
14304 /* A pair of DIE offset and GDB type pointer. We store these
14305 in a hash table separate from the DIEs, and preserve them
14306 when the DIEs are flushed out of cache. */
14308 struct dwarf2_offset_and_type
14310 unsigned int offset;
14314 /* Hash function for a dwarf2_offset_and_type. */
14317 offset_and_type_hash (const void *item)
14319 const struct dwarf2_offset_and_type *ofs = item;
14321 return ofs->offset;
14324 /* Equality function for a dwarf2_offset_and_type. */
14327 offset_and_type_eq (const void *item_lhs, const void *item_rhs)
14329 const struct dwarf2_offset_and_type *ofs_lhs = item_lhs;
14330 const struct dwarf2_offset_and_type *ofs_rhs = item_rhs;
14332 return ofs_lhs->offset == ofs_rhs->offset;
14335 /* Set the type associated with DIE to TYPE. Save it in CU's hash
14336 table if necessary. For convenience, return TYPE.
14338 The DIEs reading must have careful ordering to:
14339 * Not cause infite loops trying to read in DIEs as a prerequisite for
14340 reading current DIE.
14341 * Not trying to dereference contents of still incompletely read in types
14342 while reading in other DIEs.
14343 * Enable referencing still incompletely read in types just by a pointer to
14344 the type without accessing its fields.
14346 Therefore caller should follow these rules:
14347 * Try to fetch any prerequisite types we may need to build this DIE type
14348 before building the type and calling set_die_type.
14349 * After building type call set_die_type for current DIE as soon as
14350 possible before fetching more types to complete the current type.
14351 * Make the type as complete as possible before fetching more types. */
14353 static struct type *
14354 set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
14356 struct dwarf2_offset_and_type **slot, ofs;
14357 struct objfile *objfile = cu->objfile;
14358 htab_t *type_hash_ptr;
14360 /* For Ada types, make sure that the gnat-specific data is always
14361 initialized (if not already set). There are a few types where
14362 we should not be doing so, because the type-specific area is
14363 already used to hold some other piece of info (eg: TYPE_CODE_FLT
14364 where the type-specific area is used to store the floatformat).
14365 But this is not a problem, because the gnat-specific information
14366 is actually not needed for these types. */
14367 if (need_gnat_info (cu)
14368 && TYPE_CODE (type) != TYPE_CODE_FUNC
14369 && TYPE_CODE (type) != TYPE_CODE_FLT
14370 && !HAVE_GNAT_AUX_INFO (type))
14371 INIT_GNAT_SPECIFIC (type);
14373 if (cu->per_cu->from_debug_types)
14374 type_hash_ptr = &dwarf2_per_objfile->debug_types_type_hash;
14376 type_hash_ptr = &dwarf2_per_objfile->debug_info_type_hash;
14378 if (*type_hash_ptr == NULL)
14381 = htab_create_alloc_ex (127,
14382 offset_and_type_hash,
14383 offset_and_type_eq,
14385 &objfile->objfile_obstack,
14386 hashtab_obstack_allocate,
14387 dummy_obstack_deallocate);
14390 ofs.offset = die->offset;
14392 slot = (struct dwarf2_offset_and_type **)
14393 htab_find_slot_with_hash (*type_hash_ptr, &ofs, ofs.offset, INSERT);
14395 complaint (&symfile_complaints,
14396 _("A problem internal to GDB: DIE 0x%x has type already set"),
14398 *slot = obstack_alloc (&objfile->objfile_obstack, sizeof (**slot));
14403 /* Look up the type for the die at DIE_OFFSET in the appropriate type_hash
14404 table, or return NULL if the die does not have a saved type. */
14406 static struct type *
14407 get_die_type_at_offset (unsigned int offset,
14408 struct dwarf2_per_cu_data *per_cu)
14410 struct dwarf2_offset_and_type *slot, ofs;
14413 if (per_cu->from_debug_types)
14414 type_hash = dwarf2_per_objfile->debug_types_type_hash;
14416 type_hash = dwarf2_per_objfile->debug_info_type_hash;
14417 if (type_hash == NULL)
14420 ofs.offset = offset;
14421 slot = htab_find_with_hash (type_hash, &ofs, ofs.offset);
14428 /* Look up the type for DIE in the appropriate type_hash table,
14429 or return NULL if DIE does not have a saved type. */
14431 static struct type *
14432 get_die_type (struct die_info *die, struct dwarf2_cu *cu)
14434 return get_die_type_at_offset (die->offset, cu->per_cu);
14437 /* Add a dependence relationship from CU to REF_PER_CU. */
14440 dwarf2_add_dependence (struct dwarf2_cu *cu,
14441 struct dwarf2_per_cu_data *ref_per_cu)
14445 if (cu->dependencies == NULL)
14447 = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
14448 NULL, &cu->comp_unit_obstack,
14449 hashtab_obstack_allocate,
14450 dummy_obstack_deallocate);
14452 slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
14454 *slot = ref_per_cu;
14457 /* Subroutine of dwarf2_mark to pass to htab_traverse.
14458 Set the mark field in every compilation unit in the
14459 cache that we must keep because we are keeping CU. */
14462 dwarf2_mark_helper (void **slot, void *data)
14464 struct dwarf2_per_cu_data *per_cu;
14466 per_cu = (struct dwarf2_per_cu_data *) *slot;
14467 if (per_cu->cu->mark)
14469 per_cu->cu->mark = 1;
14471 if (per_cu->cu->dependencies != NULL)
14472 htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
14477 /* Set the mark field in CU and in every other compilation unit in the
14478 cache that we must keep because we are keeping CU. */
14481 dwarf2_mark (struct dwarf2_cu *cu)
14486 if (cu->dependencies != NULL)
14487 htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
14491 dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
14495 per_cu->cu->mark = 0;
14496 per_cu = per_cu->cu->read_in_chain;
14500 /* Trivial hash function for partial_die_info: the hash value of a DIE
14501 is its offset in .debug_info for this objfile. */
14504 partial_die_hash (const void *item)
14506 const struct partial_die_info *part_die = item;
14508 return part_die->offset;
14511 /* Trivial comparison function for partial_die_info structures: two DIEs
14512 are equal if they have the same offset. */
14515 partial_die_eq (const void *item_lhs, const void *item_rhs)
14517 const struct partial_die_info *part_die_lhs = item_lhs;
14518 const struct partial_die_info *part_die_rhs = item_rhs;
14520 return part_die_lhs->offset == part_die_rhs->offset;
14523 static struct cmd_list_element *set_dwarf2_cmdlist;
14524 static struct cmd_list_element *show_dwarf2_cmdlist;
14527 set_dwarf2_cmd (char *args, int from_tty)
14529 help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
14533 show_dwarf2_cmd (char *args, int from_tty)
14535 cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
14538 /* If section described by INFO was mmapped, munmap it now. */
14541 munmap_section_buffer (struct dwarf2_section_info *info)
14543 if (info->was_mmapped)
14546 intptr_t begin = (intptr_t) info->buffer;
14547 intptr_t map_begin = begin & ~(pagesize - 1);
14548 size_t map_length = info->size + begin - map_begin;
14550 gdb_assert (munmap ((void *) map_begin, map_length) == 0);
14552 /* Without HAVE_MMAP, we should never be here to begin with. */
14553 gdb_assert_not_reached ("no mmap support");
14558 /* munmap debug sections for OBJFILE, if necessary. */
14561 dwarf2_per_objfile_free (struct objfile *objfile, void *d)
14563 struct dwarf2_per_objfile *data = d;
14565 /* This is sorted according to the order they're defined in to make it easier
14566 to keep in sync. */
14567 munmap_section_buffer (&data->info);
14568 munmap_section_buffer (&data->abbrev);
14569 munmap_section_buffer (&data->line);
14570 munmap_section_buffer (&data->loc);
14571 munmap_section_buffer (&data->macinfo);
14572 munmap_section_buffer (&data->str);
14573 munmap_section_buffer (&data->ranges);
14574 munmap_section_buffer (&data->types);
14575 munmap_section_buffer (&data->frame);
14576 munmap_section_buffer (&data->eh_frame);
14577 munmap_section_buffer (&data->gdb_index);
14582 /* The contents of the hash table we create when building the string
14584 struct strtab_entry
14586 offset_type offset;
14590 /* Hash function for a strtab_entry. */
14592 hash_strtab_entry (const void *e)
14594 const struct strtab_entry *entry = e;
14595 return mapped_index_string_hash (entry->str);
14598 /* Equality function for a strtab_entry. */
14600 eq_strtab_entry (const void *a, const void *b)
14602 const struct strtab_entry *ea = a;
14603 const struct strtab_entry *eb = b;
14604 return !strcmp (ea->str, eb->str);
14607 /* Create a strtab_entry hash table. */
14609 create_strtab (void)
14611 return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry,
14612 xfree, xcalloc, xfree);
14615 /* Add a string to the constant pool. Return the string's offset in
14618 add_string (htab_t table, struct obstack *cpool, const char *str)
14621 struct strtab_entry entry;
14622 struct strtab_entry *result;
14625 slot = htab_find_slot (table, &entry, INSERT);
14630 result = XNEW (struct strtab_entry);
14631 result->offset = obstack_object_size (cpool);
14633 obstack_grow_str0 (cpool, str);
14636 return result->offset;
14639 /* An entry in the symbol table. */
14640 struct symtab_index_entry
14642 /* The name of the symbol. */
14644 /* The offset of the name in the constant pool. */
14645 offset_type index_offset;
14646 /* A sorted vector of the indices of all the CUs that hold an object
14648 VEC (offset_type) *cu_indices;
14651 /* The symbol table. This is a power-of-2-sized hash table. */
14652 struct mapped_symtab
14654 offset_type n_elements;
14656 struct symtab_index_entry **data;
14659 /* Hash function for a symtab_index_entry. */
14661 hash_symtab_entry (const void *e)
14663 const struct symtab_index_entry *entry = e;
14664 return iterative_hash (VEC_address (offset_type, entry->cu_indices),
14665 sizeof (offset_type) * VEC_length (offset_type,
14666 entry->cu_indices),
14670 /* Equality function for a symtab_index_entry. */
14672 eq_symtab_entry (const void *a, const void *b)
14674 const struct symtab_index_entry *ea = a;
14675 const struct symtab_index_entry *eb = b;
14676 int len = VEC_length (offset_type, ea->cu_indices);
14677 if (len != VEC_length (offset_type, eb->cu_indices))
14679 return !memcmp (VEC_address (offset_type, ea->cu_indices),
14680 VEC_address (offset_type, eb->cu_indices),
14681 sizeof (offset_type) * len);
14684 /* Destroy a symtab_index_entry. */
14686 delete_symtab_entry (void *p)
14688 struct symtab_index_entry *entry = p;
14689 VEC_free (offset_type, entry->cu_indices);
14693 /* Create a hash table holding symtab_index_entry objects. */
14695 create_index_table (void)
14697 return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry,
14698 delete_symtab_entry, xcalloc, xfree);
14701 /* Create a new mapped symtab object. */
14702 static struct mapped_symtab *
14703 create_mapped_symtab (void)
14705 struct mapped_symtab *symtab = XNEW (struct mapped_symtab);
14706 symtab->n_elements = 0;
14707 symtab->size = 1024;
14708 symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
14712 /* Destroy a mapped_symtab. */
14714 cleanup_mapped_symtab (void *p)
14716 struct mapped_symtab *symtab = p;
14717 /* The contents of the array are freed when the other hash table is
14719 xfree (symtab->data);
14723 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
14725 static struct symtab_index_entry **
14726 find_slot (struct mapped_symtab *symtab, const char *name)
14728 offset_type index, step, hash = mapped_index_string_hash (name);
14730 index = hash & (symtab->size - 1);
14731 step = ((hash * 17) & (symtab->size - 1)) | 1;
14735 if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name))
14736 return &symtab->data[index];
14737 index = (index + step) & (symtab->size - 1);
14741 /* Expand SYMTAB's hash table. */
14743 hash_expand (struct mapped_symtab *symtab)
14745 offset_type old_size = symtab->size;
14747 struct symtab_index_entry **old_entries = symtab->data;
14750 symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
14752 for (i = 0; i < old_size; ++i)
14754 if (old_entries[i])
14756 struct symtab_index_entry **slot = find_slot (symtab,
14757 old_entries[i]->name);
14758 *slot = old_entries[i];
14762 xfree (old_entries);
14765 /* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
14766 is the index of the CU in which the symbol appears. */
14768 add_index_entry (struct mapped_symtab *symtab, const char *name,
14769 offset_type cu_index)
14771 struct symtab_index_entry **slot;
14773 ++symtab->n_elements;
14774 if (4 * symtab->n_elements / 3 >= symtab->size)
14775 hash_expand (symtab);
14777 slot = find_slot (symtab, name);
14780 *slot = XNEW (struct symtab_index_entry);
14781 (*slot)->name = name;
14782 (*slot)->cu_indices = NULL;
14784 /* Don't push an index twice. Due to how we add entries we only
14785 have to check the last one. */
14786 if (VEC_empty (offset_type, (*slot)->cu_indices)
14787 || VEC_length (offset_type, (*slot)->cu_indices) != cu_index)
14788 VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index);
14791 /* Add a vector of indices to the constant pool. */
14793 add_indices_to_cpool (htab_t index_table, struct obstack *cpool,
14794 struct symtab_index_entry *entry)
14798 slot = htab_find_slot (index_table, entry, INSERT);
14801 offset_type len = VEC_length (offset_type, entry->cu_indices);
14802 offset_type val = MAYBE_SWAP (len);
14807 entry->index_offset = obstack_object_size (cpool);
14809 obstack_grow (cpool, &val, sizeof (val));
14811 VEC_iterate (offset_type, entry->cu_indices, i, iter);
14814 val = MAYBE_SWAP (iter);
14815 obstack_grow (cpool, &val, sizeof (val));
14820 struct symtab_index_entry *old_entry = *slot;
14821 entry->index_offset = old_entry->index_offset;
14824 return entry->index_offset;
14827 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
14828 constant pool entries going into the obstack CPOOL. */
14830 write_hash_table (struct mapped_symtab *symtab,
14831 struct obstack *output, struct obstack *cpool)
14834 htab_t index_table;
14837 index_table = create_index_table ();
14838 str_table = create_strtab ();
14839 /* We add all the index vectors to the constant pool first, to
14840 ensure alignment is ok. */
14841 for (i = 0; i < symtab->size; ++i)
14843 if (symtab->data[i])
14844 add_indices_to_cpool (index_table, cpool, symtab->data[i]);
14847 /* Now write out the hash table. */
14848 for (i = 0; i < symtab->size; ++i)
14850 offset_type str_off, vec_off;
14852 if (symtab->data[i])
14854 str_off = add_string (str_table, cpool, symtab->data[i]->name);
14855 vec_off = symtab->data[i]->index_offset;
14859 /* While 0 is a valid constant pool index, it is not valid
14860 to have 0 for both offsets. */
14865 str_off = MAYBE_SWAP (str_off);
14866 vec_off = MAYBE_SWAP (vec_off);
14868 obstack_grow (output, &str_off, sizeof (str_off));
14869 obstack_grow (output, &vec_off, sizeof (vec_off));
14872 htab_delete (str_table);
14873 htab_delete (index_table);
14876 /* Write an address entry to ADDR_OBSTACK. The addresses are taken
14877 from PST; CU_INDEX is the index of the CU in the vector of all
14880 add_address_entry (struct objfile *objfile,
14881 struct obstack *addr_obstack, struct partial_symtab *pst,
14882 unsigned int cu_index)
14884 offset_type offset;
14886 CORE_ADDR baseaddr;
14888 /* Don't bother recording empty ranges. */
14889 if (pst->textlow == pst->texthigh)
14892 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
14894 store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, pst->textlow - baseaddr);
14895 obstack_grow (addr_obstack, addr, 8);
14896 store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, pst->texthigh - baseaddr);
14897 obstack_grow (addr_obstack, addr, 8);
14898 offset = MAYBE_SWAP (cu_index);
14899 obstack_grow (addr_obstack, &offset, sizeof (offset_type));
14902 /* Add a list of partial symbols to SYMTAB. */
14904 write_psymbols (struct mapped_symtab *symtab,
14905 struct partial_symbol **psymp,
14907 offset_type cu_index)
14909 for (; count-- > 0; ++psymp)
14911 if (SYMBOL_LANGUAGE (*psymp) == language_ada)
14912 error (_("Ada is not currently supported by the index"));
14913 add_index_entry (symtab, SYMBOL_NATURAL_NAME (*psymp), cu_index);
14917 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
14918 exception if there is an error. */
14920 write_obstack (FILE *file, struct obstack *obstack)
14922 if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack),
14924 != obstack_object_size (obstack))
14925 error (_("couldn't data write to file"));
14928 /* Unlink a file if the argument is not NULL. */
14930 unlink_if_set (void *p)
14932 char **filename = p;
14934 unlink (*filename);
14937 /* A helper struct used when iterating over debug_types. */
14938 struct signatured_type_index_data
14940 struct objfile *objfile;
14941 struct mapped_symtab *symtab;
14942 struct obstack *types_list;
14946 /* A helper function that writes a single signatured_type to an
14949 write_one_signatured_type (void **slot, void *d)
14951 struct signatured_type_index_data *info = d;
14952 struct signatured_type *entry = (struct signatured_type *) *slot;
14953 struct dwarf2_per_cu_data *per_cu = &entry->per_cu;
14954 struct partial_symtab *psymtab = per_cu->v.psymtab;
14957 write_psymbols (info->symtab,
14958 info->objfile->global_psymbols.list + psymtab->globals_offset,
14959 psymtab->n_global_syms, info->cu_index);
14960 write_psymbols (info->symtab,
14961 info->objfile->static_psymbols.list + psymtab->statics_offset,
14962 psymtab->n_static_syms, info->cu_index);
14964 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->offset);
14965 obstack_grow (info->types_list, val, 8);
14966 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->type_offset);
14967 obstack_grow (info->types_list, val, 8);
14968 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature);
14969 obstack_grow (info->types_list, val, 8);
14976 /* Create an index file for OBJFILE in the directory DIR. */
14978 write_psymtabs_to_index (struct objfile *objfile, const char *dir)
14980 struct cleanup *cleanup;
14981 char *filename, *cleanup_filename;
14982 struct obstack contents, addr_obstack, constant_pool, symtab_obstack;
14983 struct obstack cu_list, types_cu_list;
14986 struct mapped_symtab *symtab;
14987 offset_type val, size_of_contents, total_len;
14991 if (!objfile->psymtabs)
14993 if (dwarf2_per_objfile->using_index)
14994 error (_("Cannot use an index to create the index"));
14996 if (stat (objfile->name, &st) < 0)
14997 perror_with_name (_("Could not stat"));
14999 filename = concat (dir, SLASH_STRING, lbasename (objfile->name),
15000 INDEX_SUFFIX, (char *) NULL);
15001 cleanup = make_cleanup (xfree, filename);
15003 out_file = fopen (filename, "wb");
15005 error (_("Can't open `%s' for writing"), filename);
15007 cleanup_filename = filename;
15008 make_cleanup (unlink_if_set, &cleanup_filename);
15010 symtab = create_mapped_symtab ();
15011 make_cleanup (cleanup_mapped_symtab, symtab);
15013 obstack_init (&addr_obstack);
15014 make_cleanup_obstack_free (&addr_obstack);
15016 obstack_init (&cu_list);
15017 make_cleanup_obstack_free (&cu_list);
15019 obstack_init (&types_cu_list);
15020 make_cleanup_obstack_free (&types_cu_list);
15022 /* The list is already sorted, so we don't need to do additional
15023 work here. Also, the debug_types entries do not appear in
15024 all_comp_units, but only in their own hash table. */
15025 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
15027 struct dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->all_comp_units[i];
15028 struct partial_symtab *psymtab = per_cu->v.psymtab;
15031 write_psymbols (symtab,
15032 objfile->global_psymbols.list + psymtab->globals_offset,
15033 psymtab->n_global_syms, i);
15034 write_psymbols (symtab,
15035 objfile->static_psymbols.list + psymtab->statics_offset,
15036 psymtab->n_static_syms, i);
15038 add_address_entry (objfile, &addr_obstack, psymtab, i);
15040 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->offset);
15041 obstack_grow (&cu_list, val, 8);
15042 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length);
15043 obstack_grow (&cu_list, val, 8);
15046 /* Write out the .debug_type entries, if any. */
15047 if (dwarf2_per_objfile->signatured_types)
15049 struct signatured_type_index_data sig_data;
15051 sig_data.objfile = objfile;
15052 sig_data.symtab = symtab;
15053 sig_data.types_list = &types_cu_list;
15054 sig_data.cu_index = dwarf2_per_objfile->n_comp_units;
15055 htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
15056 write_one_signatured_type, &sig_data);
15059 obstack_init (&constant_pool);
15060 make_cleanup_obstack_free (&constant_pool);
15061 obstack_init (&symtab_obstack);
15062 make_cleanup_obstack_free (&symtab_obstack);
15063 write_hash_table (symtab, &symtab_obstack, &constant_pool);
15065 obstack_init (&contents);
15066 make_cleanup_obstack_free (&contents);
15067 size_of_contents = 6 * sizeof (offset_type);
15068 total_len = size_of_contents;
15070 /* The version number. */
15071 val = MAYBE_SWAP (2);
15072 obstack_grow (&contents, &val, sizeof (val));
15074 /* The offset of the CU list from the start of the file. */
15075 val = MAYBE_SWAP (total_len);
15076 obstack_grow (&contents, &val, sizeof (val));
15077 total_len += obstack_object_size (&cu_list);
15079 /* The offset of the types CU list from the start of the file. */
15080 val = MAYBE_SWAP (total_len);
15081 obstack_grow (&contents, &val, sizeof (val));
15082 total_len += obstack_object_size (&types_cu_list);
15084 /* The offset of the address table from the start of the file. */
15085 val = MAYBE_SWAP (total_len);
15086 obstack_grow (&contents, &val, sizeof (val));
15087 total_len += obstack_object_size (&addr_obstack);
15089 /* The offset of the symbol table from the start of the file. */
15090 val = MAYBE_SWAP (total_len);
15091 obstack_grow (&contents, &val, sizeof (val));
15092 total_len += obstack_object_size (&symtab_obstack);
15094 /* The offset of the constant pool from the start of the file. */
15095 val = MAYBE_SWAP (total_len);
15096 obstack_grow (&contents, &val, sizeof (val));
15097 total_len += obstack_object_size (&constant_pool);
15099 gdb_assert (obstack_object_size (&contents) == size_of_contents);
15101 write_obstack (out_file, &contents);
15102 write_obstack (out_file, &cu_list);
15103 write_obstack (out_file, &types_cu_list);
15104 write_obstack (out_file, &addr_obstack);
15105 write_obstack (out_file, &symtab_obstack);
15106 write_obstack (out_file, &constant_pool);
15110 /* We want to keep the file, so we set cleanup_filename to NULL
15111 here. See unlink_if_set. */
15112 cleanup_filename = NULL;
15114 do_cleanups (cleanup);
15117 /* The mapped index file format is designed to be directly mmap()able
15118 on any architecture. In most cases, a datum is represented using a
15119 little-endian 32-bit integer value, called an offset_type. Big
15120 endian machines must byte-swap the values before using them.
15121 Exceptions to this rule are noted. The data is laid out such that
15122 alignment is always respected.
15124 A mapped index consists of several sections.
15126 1. The file header. This is a sequence of values, of offset_type
15127 unless otherwise noted:
15128 [0] The version number. Currently 1 or 2. The differences are
15129 noted below. Version 1 did not account for .debug_types sections;
15130 the presence of a .debug_types section invalidates any version 1
15131 index that may exist.
15132 [1] The offset, from the start of the file, of the CU list.
15133 [1.5] In version 2, the offset, from the start of the file, of the
15134 types CU list. This offset does not appear in version 1. Note
15135 that this can be empty, in which case this offset will be equal to
15137 [2] The offset, from the start of the file, of the address section.
15138 [3] The offset, from the start of the file, of the symbol table.
15139 [4] The offset, from the start of the file, of the constant pool.
15141 2. The CU list. This is a sequence of pairs of 64-bit
15142 little-endian values, sorted by the CU offset. The first element
15143 in each pair is the offset of a CU in the .debug_info section. The
15144 second element in each pair is the length of that CU. References
15145 to a CU elsewhere in the map are done using a CU index, which is
15146 just the 0-based index into this table. Note that if there are
15147 type CUs, then conceptually CUs and type CUs form a single list for
15148 the purposes of CU indices.
15150 2.5 The types CU list. This does not appear in a version 1 index.
15151 This is a sequence of triplets of 64-bit little-endian values. In
15152 a triplet, the first value is the CU offset, the second value is
15153 the type offset in the CU, and the third value is the type
15154 signature. The types CU list is not sorted.
15156 3. The address section. The address section consists of a sequence
15157 of address entries. Each address entry has three elements.
15158 [0] The low address. This is a 64-bit little-endian value.
15159 [1] The high address. This is a 64-bit little-endian value.
15160 [2] The CU index. This is an offset_type value.
15162 4. The symbol table. This is a hash table. The size of the hash
15163 table is always a power of 2. The initial hash and the step are
15164 currently defined by the `find_slot' function.
15166 Each slot in the hash table consists of a pair of offset_type
15167 values. The first value is the offset of the symbol's name in the
15168 constant pool. The second value is the offset of the CU vector in
15171 If both values are 0, then this slot in the hash table is empty.
15172 This is ok because while 0 is a valid constant pool index, it
15173 cannot be a valid index for both a string and a CU vector.
15175 A string in the constant pool is stored as a \0-terminated string,
15178 A CU vector in the constant pool is a sequence of offset_type
15179 values. The first value is the number of CU indices in the vector.
15180 Each subsequent value is the index of a CU in the CU list. This
15181 element in the hash table is used to indicate which CUs define the
15184 5. The constant pool. This is simply a bunch of bytes. It is
15185 organized so that alignment is correct: CU vectors are stored
15186 first, followed by strings. */
15188 save_gdb_index_command (char *arg, int from_tty)
15190 struct objfile *objfile;
15193 error (_("usage: save gdb-index DIRECTORY"));
15195 ALL_OBJFILES (objfile)
15199 /* If the objfile does not correspond to an actual file, skip it. */
15200 if (stat (objfile->name, &st) < 0)
15203 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
15204 if (dwarf2_per_objfile)
15206 volatile struct gdb_exception except;
15208 TRY_CATCH (except, RETURN_MASK_ERROR)
15210 write_psymtabs_to_index (objfile, arg);
15212 if (except.reason < 0)
15213 exception_fprintf (gdb_stderr, except,
15214 _("Error while writing index for `%s': "),
15222 int dwarf2_always_disassemble;
15225 show_dwarf2_always_disassemble (struct ui_file *file, int from_tty,
15226 struct cmd_list_element *c, const char *value)
15228 fprintf_filtered (file, _("\
15229 Whether to always disassemble DWARF expressions is %s.\n"),
15233 void _initialize_dwarf2_read (void);
15236 _initialize_dwarf2_read (void)
15238 struct cmd_list_element *c;
15240 dwarf2_objfile_data_key
15241 = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free);
15243 add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
15244 Set DWARF 2 specific variables.\n\
15245 Configure DWARF 2 variables such as the cache size"),
15246 &set_dwarf2_cmdlist, "maintenance set dwarf2 ",
15247 0/*allow-unknown*/, &maintenance_set_cmdlist);
15249 add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\
15250 Show DWARF 2 specific variables\n\
15251 Show DWARF 2 variables such as the cache size"),
15252 &show_dwarf2_cmdlist, "maintenance show dwarf2 ",
15253 0/*allow-unknown*/, &maintenance_show_cmdlist);
15255 add_setshow_zinteger_cmd ("max-cache-age", class_obscure,
15256 &dwarf2_max_cache_age, _("\
15257 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
15258 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
15259 A higher limit means that cached compilation units will be stored\n\
15260 in memory longer, and more total memory will be used. Zero disables\n\
15261 caching, which can slow down startup."),
15263 show_dwarf2_max_cache_age,
15264 &set_dwarf2_cmdlist,
15265 &show_dwarf2_cmdlist);
15267 add_setshow_boolean_cmd ("always-disassemble", class_obscure,
15268 &dwarf2_always_disassemble, _("\
15269 Set whether `info address' always disassembles DWARF expressions."), _("\
15270 Show whether `info address' always disassembles DWARF expressions."), _("\
15271 When enabled, DWARF expressions are always printed in an assembly-like\n\
15272 syntax. When disabled, expressions will be printed in a more\n\
15273 conversational style, when possible."),
15275 show_dwarf2_always_disassemble,
15276 &set_dwarf2_cmdlist,
15277 &show_dwarf2_cmdlist);
15279 add_setshow_zinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\
15280 Set debugging of the dwarf2 DIE reader."), _("\
15281 Show debugging of the dwarf2 DIE reader."), _("\
15282 When enabled (non-zero), DIEs are dumped after they are read in.\n\
15283 The value is the maximum depth to print."),
15286 &setdebuglist, &showdebuglist);
15288 c = add_cmd ("gdb-index", class_files, save_gdb_index_command,
15289 _("Save a .gdb-index file"),
15291 set_cmd_completer (c, filename_completer);