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. */
673 struct die_info *child; /* Its first child, if any. */
674 struct die_info *sibling; /* Its next sibling, if any. */
675 struct die_info *parent; /* Its parent, if any. */
677 /* An array of attributes, with NUM_ATTRS elements. There may be
678 zero, but it's not common and zero-sized arrays are not
679 sufficiently portable C. */
680 struct attribute attrs[1];
683 struct function_range
686 CORE_ADDR lowpc, highpc;
688 struct function_range *next;
691 /* Get at parts of an attribute structure */
693 #define DW_STRING(attr) ((attr)->u.str)
694 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
695 #define DW_UNSND(attr) ((attr)->u.unsnd)
696 #define DW_BLOCK(attr) ((attr)->u.blk)
697 #define DW_SND(attr) ((attr)->u.snd)
698 #define DW_ADDR(attr) ((attr)->u.addr)
699 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
701 /* Blocks are a bunch of untyped bytes. */
708 #ifndef ATTR_ALLOC_CHUNK
709 #define ATTR_ALLOC_CHUNK 4
712 /* Allocate fields for structs, unions and enums in this size. */
713 #ifndef DW_FIELD_ALLOC_CHUNK
714 #define DW_FIELD_ALLOC_CHUNK 4
717 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
718 but this would require a corresponding change in unpack_field_as_long
720 static int bits_per_byte = 8;
722 /* The routines that read and process dies for a C struct or C++ class
723 pass lists of data member fields and lists of member function fields
724 in an instance of a field_info structure, as defined below. */
727 /* List of data member and baseclasses fields. */
730 struct nextfield *next;
735 *fields, *baseclasses;
737 /* Number of fields (including baseclasses). */
740 /* Number of baseclasses. */
743 /* Set if the accesibility of one of the fields is not public. */
744 int non_public_fields;
746 /* Member function fields array, entries are allocated in the order they
747 are encountered in the object file. */
750 struct nextfnfield *next;
751 struct fn_field fnfield;
755 /* Member function fieldlist array, contains name of possibly overloaded
756 member function, number of overloaded member functions and a pointer
757 to the head of the member function field chain. */
762 struct nextfnfield *head;
766 /* Number of entries in the fnfieldlists array. */
769 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
770 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
771 struct typedef_field_list
773 struct typedef_field field;
774 struct typedef_field_list *next;
777 unsigned typedef_field_list_count;
780 /* One item on the queue of compilation units to read in full symbols
782 struct dwarf2_queue_item
784 struct dwarf2_per_cu_data *per_cu;
785 struct dwarf2_queue_item *next;
788 /* The current queue. */
789 static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail;
791 /* Loaded secondary compilation units are kept in memory until they
792 have not been referenced for the processing of this many
793 compilation units. Set this to zero to disable caching. Cache
794 sizes of up to at least twenty will improve startup time for
795 typical inter-CU-reference binaries, at an obvious memory cost. */
796 static int dwarf2_max_cache_age = 5;
798 show_dwarf2_max_cache_age (struct ui_file *file, int from_tty,
799 struct cmd_list_element *c, const char *value)
801 fprintf_filtered (file, _("\
802 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
807 /* Various complaints about symbol reading that don't abort the process */
810 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
812 complaint (&symfile_complaints,
813 _("statement list doesn't fit in .debug_line section"));
817 dwarf2_debug_line_missing_file_complaint (void)
819 complaint (&symfile_complaints,
820 _(".debug_line section has line data without a file"));
824 dwarf2_debug_line_missing_end_sequence_complaint (void)
826 complaint (&symfile_complaints,
827 _(".debug_line section has line program sequence without an end"));
831 dwarf2_complex_location_expr_complaint (void)
833 complaint (&symfile_complaints, _("location expression too complex"));
837 dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
840 complaint (&symfile_complaints,
841 _("const value length mismatch for '%s', got %d, expected %d"), arg1,
846 dwarf2_macros_too_long_complaint (void)
848 complaint (&symfile_complaints,
849 _("macro info runs off end of `.debug_macinfo' section"));
853 dwarf2_macro_malformed_definition_complaint (const char *arg1)
855 complaint (&symfile_complaints,
856 _("macro debug info contains a malformed macro definition:\n`%s'"),
861 dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
863 complaint (&symfile_complaints,
864 _("invalid attribute class or form for '%s' in '%s'"), arg1, arg2);
867 /* local function prototypes */
869 static void dwarf2_locate_sections (bfd *, asection *, void *);
871 static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
874 static void dwarf2_build_psymtabs_hard (struct objfile *);
876 static void scan_partial_symbols (struct partial_die_info *,
877 CORE_ADDR *, CORE_ADDR *,
878 int, struct dwarf2_cu *);
880 static void add_partial_symbol (struct partial_die_info *,
883 static void add_partial_namespace (struct partial_die_info *pdi,
884 CORE_ADDR *lowpc, CORE_ADDR *highpc,
885 int need_pc, struct dwarf2_cu *cu);
887 static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
888 CORE_ADDR *highpc, int need_pc,
889 struct dwarf2_cu *cu);
891 static void add_partial_enumeration (struct partial_die_info *enum_pdi,
892 struct dwarf2_cu *cu);
894 static void add_partial_subprogram (struct partial_die_info *pdi,
895 CORE_ADDR *lowpc, CORE_ADDR *highpc,
896 int need_pc, struct dwarf2_cu *cu);
898 static gdb_byte *locate_pdi_sibling (struct partial_die_info *orig_pdi,
899 gdb_byte *buffer, gdb_byte *info_ptr,
900 bfd *abfd, struct dwarf2_cu *cu);
902 static void dwarf2_psymtab_to_symtab (struct partial_symtab *);
904 static void psymtab_to_symtab_1 (struct partial_symtab *);
906 static void dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu);
908 static void dwarf2_free_abbrev_table (void *);
910 static struct abbrev_info *peek_die_abbrev (gdb_byte *, unsigned int *,
913 static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int,
916 static struct partial_die_info *load_partial_dies (bfd *,
917 gdb_byte *, gdb_byte *,
918 int, struct dwarf2_cu *);
920 static gdb_byte *read_partial_die (struct partial_die_info *,
921 struct abbrev_info *abbrev,
923 gdb_byte *, gdb_byte *,
926 static struct partial_die_info *find_partial_die (unsigned int,
929 static void fixup_partial_die (struct partial_die_info *,
932 static gdb_byte *read_attribute (struct attribute *, struct attr_abbrev *,
933 bfd *, gdb_byte *, struct dwarf2_cu *);
935 static gdb_byte *read_attribute_value (struct attribute *, unsigned,
936 bfd *, gdb_byte *, struct dwarf2_cu *);
938 static unsigned int read_1_byte (bfd *, gdb_byte *);
940 static int read_1_signed_byte (bfd *, gdb_byte *);
942 static unsigned int read_2_bytes (bfd *, gdb_byte *);
944 static unsigned int read_4_bytes (bfd *, gdb_byte *);
946 static ULONGEST read_8_bytes (bfd *, gdb_byte *);
948 static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *,
951 static LONGEST read_initial_length (bfd *, gdb_byte *, unsigned int *);
953 static LONGEST read_checked_initial_length_and_offset
954 (bfd *, gdb_byte *, const struct comp_unit_head *,
955 unsigned int *, unsigned int *);
957 static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *,
960 static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int);
962 static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int);
964 static char *read_direct_string (bfd *, gdb_byte *, unsigned int *);
966 static char *read_indirect_string (bfd *, gdb_byte *,
967 const struct comp_unit_head *,
970 static unsigned long read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *);
972 static long read_signed_leb128 (bfd *, gdb_byte *, unsigned int *);
974 static gdb_byte *skip_leb128 (bfd *, gdb_byte *);
976 static void set_cu_language (unsigned int, struct dwarf2_cu *);
978 static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
981 static struct attribute *dwarf2_attr_no_follow (struct die_info *,
985 static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
986 struct dwarf2_cu *cu);
988 static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
990 static struct die_info *die_specification (struct die_info *die,
991 struct dwarf2_cu **);
993 static void free_line_header (struct line_header *lh);
995 static void add_file_name (struct line_header *, char *, unsigned int,
996 unsigned int, unsigned int);
998 static struct line_header *(dwarf_decode_line_header
999 (unsigned int offset,
1000 bfd *abfd, struct dwarf2_cu *cu));
1002 static void dwarf_decode_lines (struct line_header *, char *, bfd *,
1003 struct dwarf2_cu *, struct partial_symtab *);
1005 static void dwarf2_start_subfile (char *, char *, char *);
1007 static struct symbol *new_symbol (struct die_info *, struct type *,
1008 struct dwarf2_cu *);
1010 static struct symbol *new_symbol_full (struct die_info *, struct type *,
1011 struct dwarf2_cu *, struct symbol *);
1013 static void dwarf2_const_value (struct attribute *, struct symbol *,
1014 struct dwarf2_cu *);
1016 static void dwarf2_const_value_attr (struct attribute *attr,
1019 struct obstack *obstack,
1020 struct dwarf2_cu *cu, long *value,
1022 struct dwarf2_locexpr_baton **baton);
1024 static struct type *die_type (struct die_info *, struct dwarf2_cu *);
1026 static int need_gnat_info (struct dwarf2_cu *);
1028 static struct type *die_descriptive_type (struct die_info *, struct dwarf2_cu *);
1030 static void set_descriptive_type (struct type *, struct die_info *,
1031 struct dwarf2_cu *);
1033 static struct type *die_containing_type (struct die_info *,
1034 struct dwarf2_cu *);
1036 static struct type *lookup_die_type (struct die_info *, struct attribute *,
1037 struct dwarf2_cu *);
1039 static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
1041 static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *);
1043 static char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
1045 static char *typename_concat (struct obstack *obs, const char *prefix,
1046 const char *suffix, int physname,
1047 struct dwarf2_cu *cu);
1049 static void read_file_scope (struct die_info *, struct dwarf2_cu *);
1051 static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *);
1053 static void read_func_scope (struct die_info *, struct dwarf2_cu *);
1055 static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
1057 static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *,
1058 struct dwarf2_cu *, struct partial_symtab *);
1060 static int dwarf2_get_pc_bounds (struct die_info *,
1061 CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *,
1062 struct partial_symtab *);
1064 static void get_scope_pc_bounds (struct die_info *,
1065 CORE_ADDR *, CORE_ADDR *,
1066 struct dwarf2_cu *);
1068 static void dwarf2_record_block_ranges (struct die_info *, struct block *,
1069 CORE_ADDR, struct dwarf2_cu *);
1071 static void dwarf2_add_field (struct field_info *, struct die_info *,
1072 struct dwarf2_cu *);
1074 static void dwarf2_attach_fields_to_type (struct field_info *,
1075 struct type *, struct dwarf2_cu *);
1077 static void dwarf2_add_member_fn (struct field_info *,
1078 struct die_info *, struct type *,
1079 struct dwarf2_cu *);
1081 static void dwarf2_attach_fn_fields_to_type (struct field_info *,
1082 struct type *, struct dwarf2_cu *);
1084 static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
1086 static void read_common_block (struct die_info *, struct dwarf2_cu *);
1088 static void read_namespace (struct die_info *die, struct dwarf2_cu *);
1090 static void read_module (struct die_info *die, struct dwarf2_cu *cu);
1092 static void read_import_statement (struct die_info *die, struct dwarf2_cu *);
1094 static struct type *read_module_type (struct die_info *die,
1095 struct dwarf2_cu *cu);
1097 static const char *namespace_name (struct die_info *die,
1098 int *is_anonymous, struct dwarf2_cu *);
1100 static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
1102 static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
1104 static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
1105 struct dwarf2_cu *);
1107 static struct die_info *read_comp_unit (gdb_byte *, struct dwarf2_cu *);
1109 static struct die_info *read_die_and_children_1 (const struct die_reader_specs *reader,
1111 gdb_byte **new_info_ptr,
1112 struct die_info *parent);
1114 static struct die_info *read_die_and_children (const struct die_reader_specs *reader,
1116 gdb_byte **new_info_ptr,
1117 struct die_info *parent);
1119 static struct die_info *read_die_and_siblings (const struct die_reader_specs *reader,
1121 gdb_byte **new_info_ptr,
1122 struct die_info *parent);
1124 static gdb_byte *read_full_die (const struct die_reader_specs *reader,
1125 struct die_info **, gdb_byte *,
1128 static void process_die (struct die_info *, struct dwarf2_cu *);
1130 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu *,
1133 static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
1135 static const char *dwarf2_full_name (char *name,
1136 struct die_info *die,
1137 struct dwarf2_cu *cu);
1139 static struct die_info *dwarf2_extension (struct die_info *die,
1140 struct dwarf2_cu **);
1142 static char *dwarf_tag_name (unsigned int);
1144 static char *dwarf_attr_name (unsigned int);
1146 static char *dwarf_form_name (unsigned int);
1148 static char *dwarf_bool_name (unsigned int);
1150 static char *dwarf_type_encoding_name (unsigned int);
1153 static char *dwarf_cfi_name (unsigned int);
1156 static struct die_info *sibling_die (struct die_info *);
1158 static void dump_die_shallow (struct ui_file *, int indent, struct die_info *);
1160 static void dump_die_for_error (struct die_info *);
1162 static void dump_die_1 (struct ui_file *, int level, int max_level,
1165 /*static*/ void dump_die (struct die_info *, int max_level);
1167 static void store_in_ref_table (struct die_info *,
1168 struct dwarf2_cu *);
1170 static int is_ref_attr (struct attribute *);
1172 static unsigned int dwarf2_get_ref_die_offset (struct attribute *);
1174 static LONGEST dwarf2_get_attr_constant_value (struct attribute *, int);
1176 static struct die_info *follow_die_ref_or_sig (struct die_info *,
1178 struct dwarf2_cu **);
1180 static struct die_info *follow_die_ref (struct die_info *,
1182 struct dwarf2_cu **);
1184 static struct die_info *follow_die_sig (struct die_info *,
1186 struct dwarf2_cu **);
1188 static void read_signatured_type_at_offset (struct objfile *objfile,
1189 unsigned int offset);
1191 static void read_signatured_type (struct objfile *,
1192 struct signatured_type *type_sig);
1194 /* memory allocation interface */
1196 static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
1198 static struct abbrev_info *dwarf_alloc_abbrev (struct dwarf2_cu *);
1200 static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int);
1202 static void initialize_cu_func_list (struct dwarf2_cu *);
1204 static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR,
1205 struct dwarf2_cu *);
1207 static void dwarf_decode_macros (struct line_header *, unsigned int,
1208 char *, bfd *, struct dwarf2_cu *);
1210 static int attr_form_is_block (struct attribute *);
1212 static int attr_form_is_section_offset (struct attribute *);
1214 static int attr_form_is_constant (struct attribute *);
1216 static void dwarf2_symbol_mark_computed (struct attribute *attr,
1218 struct dwarf2_cu *cu);
1220 static gdb_byte *skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
1221 struct abbrev_info *abbrev,
1222 struct dwarf2_cu *cu);
1224 static void free_stack_comp_unit (void *);
1226 static hashval_t partial_die_hash (const void *item);
1228 static int partial_die_eq (const void *item_lhs, const void *item_rhs);
1230 static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
1231 (unsigned int offset, struct objfile *objfile);
1233 static struct dwarf2_per_cu_data *dwarf2_find_comp_unit
1234 (unsigned int offset, struct objfile *objfile);
1236 static struct dwarf2_cu *alloc_one_comp_unit (struct objfile *objfile);
1238 static void free_one_comp_unit (void *);
1240 static void free_cached_comp_units (void *);
1242 static void age_cached_comp_units (void);
1244 static void free_one_cached_comp_unit (void *);
1246 static struct type *set_die_type (struct die_info *, struct type *,
1247 struct dwarf2_cu *);
1249 static void create_all_comp_units (struct objfile *);
1251 static int create_debug_types_hash_table (struct objfile *objfile);
1253 static void load_full_comp_unit (struct dwarf2_per_cu_data *,
1256 static void process_full_comp_unit (struct dwarf2_per_cu_data *);
1258 static void dwarf2_add_dependence (struct dwarf2_cu *,
1259 struct dwarf2_per_cu_data *);
1261 static void dwarf2_mark (struct dwarf2_cu *);
1263 static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
1265 static struct type *get_die_type_at_offset (unsigned int,
1266 struct dwarf2_per_cu_data *per_cu);
1268 static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu);
1270 static void dwarf2_release_queue (void *dummy);
1272 static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu,
1273 struct objfile *objfile);
1275 static void process_queue (struct objfile *objfile);
1277 static void find_file_and_directory (struct die_info *die,
1278 struct dwarf2_cu *cu,
1279 char **name, char **comp_dir);
1281 static char *file_full_name (int file, struct line_header *lh,
1282 const char *comp_dir);
1284 static gdb_byte *partial_read_comp_unit_head (struct comp_unit_head *header,
1287 unsigned int buffer_size,
1290 static void init_cu_die_reader (struct die_reader_specs *reader,
1291 struct dwarf2_cu *cu);
1293 static htab_t allocate_signatured_type_table (struct objfile *objfile);
1297 /* Convert VALUE between big- and little-endian. */
1299 byte_swap (offset_type value)
1303 result = (value & 0xff) << 24;
1304 result |= (value & 0xff00) << 8;
1305 result |= (value & 0xff0000) >> 8;
1306 result |= (value & 0xff000000) >> 24;
1310 #define MAYBE_SWAP(V) byte_swap (V)
1313 #define MAYBE_SWAP(V) (V)
1314 #endif /* WORDS_BIGENDIAN */
1316 /* The suffix for an index file. */
1317 #define INDEX_SUFFIX ".gdb-index"
1319 static const char *dwarf2_physname (char *name, struct die_info *die,
1320 struct dwarf2_cu *cu);
1322 /* Try to locate the sections we need for DWARF 2 debugging
1323 information and return true if we have enough to do something. */
1326 dwarf2_has_info (struct objfile *objfile)
1328 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
1329 if (!dwarf2_per_objfile)
1331 /* Initialize per-objfile state. */
1332 struct dwarf2_per_objfile *data
1333 = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
1335 memset (data, 0, sizeof (*data));
1336 set_objfile_data (objfile, dwarf2_objfile_data_key, data);
1337 dwarf2_per_objfile = data;
1339 bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL);
1340 dwarf2_per_objfile->objfile = objfile;
1342 return (dwarf2_per_objfile->info.asection != NULL
1343 && dwarf2_per_objfile->abbrev.asection != NULL);
1346 /* When loading sections, we can either look for ".<name>", or for
1347 * ".z<name>", which indicates a compressed section. */
1350 section_is_p (const char *section_name, const char *name)
1352 return (section_name[0] == '.'
1353 && (strcmp (section_name + 1, name) == 0
1354 || (section_name[1] == 'z'
1355 && strcmp (section_name + 2, name) == 0)));
1358 /* This function is mapped across the sections and remembers the
1359 offset and size of each of the debugging sections we are interested
1363 dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr)
1365 if (section_is_p (sectp->name, INFO_SECTION))
1367 dwarf2_per_objfile->info.asection = sectp;
1368 dwarf2_per_objfile->info.size = bfd_get_section_size (sectp);
1370 else if (section_is_p (sectp->name, ABBREV_SECTION))
1372 dwarf2_per_objfile->abbrev.asection = sectp;
1373 dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp);
1375 else if (section_is_p (sectp->name, LINE_SECTION))
1377 dwarf2_per_objfile->line.asection = sectp;
1378 dwarf2_per_objfile->line.size = bfd_get_section_size (sectp);
1380 else if (section_is_p (sectp->name, LOC_SECTION))
1382 dwarf2_per_objfile->loc.asection = sectp;
1383 dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp);
1385 else if (section_is_p (sectp->name, MACINFO_SECTION))
1387 dwarf2_per_objfile->macinfo.asection = sectp;
1388 dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp);
1390 else if (section_is_p (sectp->name, STR_SECTION))
1392 dwarf2_per_objfile->str.asection = sectp;
1393 dwarf2_per_objfile->str.size = bfd_get_section_size (sectp);
1395 else if (section_is_p (sectp->name, FRAME_SECTION))
1397 dwarf2_per_objfile->frame.asection = sectp;
1398 dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp);
1400 else if (section_is_p (sectp->name, EH_FRAME_SECTION))
1402 flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
1404 if (aflag & SEC_HAS_CONTENTS)
1406 dwarf2_per_objfile->eh_frame.asection = sectp;
1407 dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp);
1410 else if (section_is_p (sectp->name, RANGES_SECTION))
1412 dwarf2_per_objfile->ranges.asection = sectp;
1413 dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp);
1415 else if (section_is_p (sectp->name, TYPES_SECTION))
1417 dwarf2_per_objfile->types.asection = sectp;
1418 dwarf2_per_objfile->types.size = bfd_get_section_size (sectp);
1420 else if (section_is_p (sectp->name, GDB_INDEX_SECTION))
1422 dwarf2_per_objfile->gdb_index.asection = sectp;
1423 dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp);
1426 if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
1427 && bfd_section_vma (abfd, sectp) == 0)
1428 dwarf2_per_objfile->has_section_at_zero = 1;
1431 /* Decompress a section that was compressed using zlib. Store the
1432 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1435 zlib_decompress_section (struct objfile *objfile, asection *sectp,
1436 gdb_byte **outbuf, bfd_size_type *outsize)
1438 bfd *abfd = objfile->obfd;
1440 error (_("Support for zlib-compressed DWARF data (from '%s') "
1441 "is disabled in this copy of GDB"),
1442 bfd_get_filename (abfd));
1444 bfd_size_type compressed_size = bfd_get_section_size (sectp);
1445 gdb_byte *compressed_buffer = xmalloc (compressed_size);
1446 struct cleanup *cleanup = make_cleanup (xfree, compressed_buffer);
1447 bfd_size_type uncompressed_size;
1448 gdb_byte *uncompressed_buffer;
1451 int header_size = 12;
1453 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1454 || bfd_bread (compressed_buffer, compressed_size, abfd) != compressed_size)
1455 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1456 bfd_get_filename (abfd));
1458 /* Read the zlib header. In this case, it should be "ZLIB" followed
1459 by the uncompressed section size, 8 bytes in big-endian order. */
1460 if (compressed_size < header_size
1461 || strncmp (compressed_buffer, "ZLIB", 4) != 0)
1462 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1463 bfd_get_filename (abfd));
1464 uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8;
1465 uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8;
1466 uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8;
1467 uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8;
1468 uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8;
1469 uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8;
1470 uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8;
1471 uncompressed_size += compressed_buffer[11];
1473 /* It is possible the section consists of several compressed
1474 buffers concatenated together, so we uncompress in a loop. */
1478 strm.avail_in = compressed_size - header_size;
1479 strm.next_in = (Bytef*) compressed_buffer + header_size;
1480 strm.avail_out = uncompressed_size;
1481 uncompressed_buffer = obstack_alloc (&objfile->objfile_obstack,
1483 rc = inflateInit (&strm);
1484 while (strm.avail_in > 0)
1487 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1488 bfd_get_filename (abfd), rc);
1489 strm.next_out = ((Bytef*) uncompressed_buffer
1490 + (uncompressed_size - strm.avail_out));
1491 rc = inflate (&strm, Z_FINISH);
1492 if (rc != Z_STREAM_END)
1493 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1494 bfd_get_filename (abfd), rc);
1495 rc = inflateReset (&strm);
1497 rc = inflateEnd (&strm);
1499 || strm.avail_out != 0)
1500 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1501 bfd_get_filename (abfd), rc);
1503 do_cleanups (cleanup);
1504 *outbuf = uncompressed_buffer;
1505 *outsize = uncompressed_size;
1509 /* Read the contents of the section SECTP from object file specified by
1510 OBJFILE, store info about the section into INFO.
1511 If the section is compressed, uncompress it before returning. */
1514 dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info)
1516 bfd *abfd = objfile->obfd;
1517 asection *sectp = info->asection;
1518 gdb_byte *buf, *retbuf;
1519 unsigned char header[4];
1523 info->buffer = NULL;
1524 info->was_mmapped = 0;
1527 if (info->asection == NULL || info->size == 0)
1530 /* Check if the file has a 4-byte header indicating compression. */
1531 if (info->size > sizeof (header)
1532 && bfd_seek (abfd, sectp->filepos, SEEK_SET) == 0
1533 && bfd_bread (header, sizeof (header), abfd) == sizeof (header))
1535 /* Upon decompression, update the buffer and its size. */
1536 if (strncmp (header, "ZLIB", sizeof (header)) == 0)
1538 zlib_decompress_section (objfile, sectp, &info->buffer,
1546 pagesize = getpagesize ();
1548 /* Only try to mmap sections which are large enough: we don't want to
1549 waste space due to fragmentation. Also, only try mmap for sections
1550 without relocations. */
1552 if (info->size > 4 * pagesize && (sectp->flags & SEC_RELOC) == 0)
1554 off_t pg_offset = sectp->filepos & ~(pagesize - 1);
1555 size_t map_length = info->size + sectp->filepos - pg_offset;
1556 caddr_t retbuf = bfd_mmap (abfd, 0, map_length, PROT_READ,
1557 MAP_PRIVATE, pg_offset);
1559 if (retbuf != MAP_FAILED)
1561 info->was_mmapped = 1;
1562 info->buffer = retbuf + (sectp->filepos & (pagesize - 1)) ;
1563 #if HAVE_POSIX_MADVISE
1564 posix_madvise (retbuf, map_length, POSIX_MADV_WILLNEED);
1571 /* If we get here, we are a normal, not-compressed section. */
1573 = obstack_alloc (&objfile->objfile_obstack, info->size);
1575 /* When debugging .o files, we may need to apply relocations; see
1576 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1577 We never compress sections in .o files, so we only need to
1578 try this when the section is not compressed. */
1579 retbuf = symfile_relocate_debug_section (objfile, sectp, buf);
1582 info->buffer = retbuf;
1586 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1587 || bfd_bread (buf, info->size, abfd) != info->size)
1588 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1589 bfd_get_filename (abfd));
1592 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1596 dwarf2_get_section_info (struct objfile *objfile, const char *section_name,
1597 asection **sectp, gdb_byte **bufp,
1598 bfd_size_type *sizep)
1600 struct dwarf2_per_objfile *data
1601 = objfile_data (objfile, dwarf2_objfile_data_key);
1602 struct dwarf2_section_info *info;
1604 /* We may see an objfile without any DWARF, in which case we just
1613 if (section_is_p (section_name, EH_FRAME_SECTION))
1614 info = &data->eh_frame;
1615 else if (section_is_p (section_name, FRAME_SECTION))
1616 info = &data->frame;
1618 gdb_assert_not_reached ("unexpected section");
1620 if (info->asection != NULL && info->size != 0 && info->buffer == NULL)
1621 /* We haven't read this section in yet. Do it now. */
1622 dwarf2_read_section (objfile, info);
1624 *sectp = info->asection;
1625 *bufp = info->buffer;
1626 *sizep = info->size;
1631 /* Read in the symbols for PER_CU. OBJFILE is the objfile from which
1634 dw2_do_instantiate_symtab (struct objfile *objfile,
1635 struct dwarf2_per_cu_data *per_cu)
1637 struct cleanup *back_to;
1639 back_to = make_cleanup (dwarf2_release_queue, NULL);
1641 queue_comp_unit (per_cu, objfile);
1643 if (per_cu->from_debug_types)
1644 read_signatured_type_at_offset (objfile, per_cu->offset);
1646 load_full_comp_unit (per_cu, objfile);
1648 process_queue (objfile);
1650 /* Age the cache, releasing compilation units that have not
1651 been used recently. */
1652 age_cached_comp_units ();
1654 do_cleanups (back_to);
1657 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
1658 the objfile from which this CU came. Returns the resulting symbol
1660 static struct symtab *
1661 dw2_instantiate_symtab (struct objfile *objfile,
1662 struct dwarf2_per_cu_data *per_cu)
1664 if (!per_cu->v.quick->symtab)
1666 struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL);
1667 increment_reading_symtab ();
1668 dw2_do_instantiate_symtab (objfile, per_cu);
1669 do_cleanups (back_to);
1671 return per_cu->v.quick->symtab;
1674 /* Return the CU given its index. */
1675 static struct dwarf2_per_cu_data *
1676 dw2_get_cu (int index)
1678 if (index >= dwarf2_per_objfile->n_comp_units)
1680 index -= dwarf2_per_objfile->n_comp_units;
1681 return dwarf2_per_objfile->type_comp_units[index];
1683 return dwarf2_per_objfile->all_comp_units[index];
1686 /* A helper function that knows how to read a 64-bit value in a way
1687 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
1690 extract_cu_value (const char *bytes, ULONGEST *result)
1692 if (sizeof (ULONGEST) < 8)
1696 /* Ignore the upper 4 bytes if they are all zero. */
1697 for (i = 0; i < 4; ++i)
1698 if (bytes[i + 4] != 0)
1701 *result = extract_unsigned_integer (bytes, 4, BFD_ENDIAN_LITTLE);
1704 *result = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE);
1708 /* Read the CU list from the mapped index, and use it to create all
1709 the CU objects for this objfile. Return 0 if something went wrong,
1710 1 if everything went ok. */
1712 create_cus_from_index (struct objfile *objfile, const gdb_byte *cu_list,
1713 offset_type cu_list_elements)
1717 dwarf2_per_objfile->n_comp_units = cu_list_elements / 2;
1718 dwarf2_per_objfile->all_comp_units
1719 = obstack_alloc (&objfile->objfile_obstack,
1720 dwarf2_per_objfile->n_comp_units
1721 * sizeof (struct dwarf2_per_cu_data *));
1723 for (i = 0; i < cu_list_elements; i += 2)
1725 struct dwarf2_per_cu_data *the_cu;
1726 ULONGEST offset, length;
1728 if (!extract_cu_value (cu_list, &offset)
1729 || !extract_cu_value (cu_list + 8, &length))
1733 the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack,
1734 struct dwarf2_per_cu_data);
1735 the_cu->offset = offset;
1736 the_cu->length = length;
1737 the_cu->objfile = objfile;
1738 the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
1739 struct dwarf2_per_cu_quick_data);
1740 dwarf2_per_objfile->all_comp_units[i / 2] = the_cu;
1746 /* Create the signatured type hash table from the index. */
1749 create_signatured_type_table_from_index (struct objfile *objfile,
1750 const gdb_byte *bytes,
1751 offset_type elements)
1754 htab_t sig_types_hash;
1756 dwarf2_per_objfile->n_type_comp_units = elements / 3;
1757 dwarf2_per_objfile->type_comp_units
1758 = obstack_alloc (&objfile->objfile_obstack,
1759 dwarf2_per_objfile->n_type_comp_units
1760 * sizeof (struct dwarf2_per_cu_data *));
1762 sig_types_hash = allocate_signatured_type_table (objfile);
1764 for (i = 0; i < elements; i += 3)
1766 struct signatured_type *type_sig;
1767 ULONGEST offset, type_offset, signature;
1770 if (!extract_cu_value (bytes, &offset)
1771 || !extract_cu_value (bytes + 8, &type_offset))
1773 signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE);
1776 type_sig = OBSTACK_ZALLOC (&objfile->objfile_obstack,
1777 struct signatured_type);
1778 type_sig->signature = signature;
1779 type_sig->offset = offset;
1780 type_sig->type_offset = type_offset;
1781 type_sig->per_cu.from_debug_types = 1;
1782 type_sig->per_cu.offset = offset;
1783 type_sig->per_cu.objfile = objfile;
1784 type_sig->per_cu.v.quick
1785 = OBSTACK_ZALLOC (&objfile->objfile_obstack,
1786 struct dwarf2_per_cu_quick_data);
1788 slot = htab_find_slot (sig_types_hash, type_sig, INSERT);
1791 dwarf2_per_objfile->type_comp_units[i / 3] = &type_sig->per_cu;
1794 dwarf2_per_objfile->signatured_types = sig_types_hash;
1799 /* Read the address map data from the mapped index, and use it to
1800 populate the objfile's psymtabs_addrmap. */
1802 create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index)
1804 const gdb_byte *iter, *end;
1805 struct obstack temp_obstack;
1806 struct addrmap *mutable_map;
1807 struct cleanup *cleanup;
1810 obstack_init (&temp_obstack);
1811 cleanup = make_cleanup_obstack_free (&temp_obstack);
1812 mutable_map = addrmap_create_mutable (&temp_obstack);
1814 iter = index->address_table;
1815 end = iter + index->address_table_size;
1817 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1821 ULONGEST hi, lo, cu_index;
1822 lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
1824 hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
1826 cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE);
1829 addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1,
1830 dw2_get_cu (cu_index));
1833 objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map,
1834 &objfile->objfile_obstack);
1835 do_cleanups (cleanup);
1838 /* The hash function for strings in the mapped index. This is the
1839 same as the hashtab.c hash function, but we keep a separate copy to
1840 maintain control over the implementation. This is necessary
1841 because the hash function is tied to the format of the mapped index
1844 mapped_index_string_hash (const void *p)
1846 const unsigned char *str = (const unsigned char *) p;
1850 while ((c = *str++) != 0)
1851 r = r * 67 + c - 113;
1856 /* Find a slot in the mapped index INDEX for the object named NAME.
1857 If NAME is found, set *VEC_OUT to point to the CU vector in the
1858 constant pool and return 1. If NAME cannot be found, return 0. */
1860 find_slot_in_mapped_hash (struct mapped_index *index, const char *name,
1861 offset_type **vec_out)
1863 offset_type hash = mapped_index_string_hash (name);
1864 offset_type slot, step;
1866 slot = hash & (index->index_table_slots - 1);
1867 step = ((hash * 17) & (index->index_table_slots - 1)) | 1;
1871 /* Convert a slot number to an offset into the table. */
1872 offset_type i = 2 * slot;
1874 if (index->index_table[i] == 0 && index->index_table[i + 1] == 0)
1877 str = index->constant_pool + MAYBE_SWAP (index->index_table[i]);
1878 if (!strcmp (name, str))
1880 *vec_out = (offset_type *) (index->constant_pool
1881 + MAYBE_SWAP (index->index_table[i + 1]));
1885 slot = (slot + step) & (index->index_table_slots - 1);
1889 /* Read the index file. If everything went ok, initialize the "quick"
1890 elements of all the CUs and return 1. Otherwise, return 0. */
1892 dwarf2_read_index (struct objfile *objfile)
1895 struct mapped_index *map;
1896 offset_type *metadata;
1897 const gdb_byte *cu_list;
1898 const gdb_byte *types_list = NULL;
1899 offset_type version, cu_list_elements;
1900 offset_type types_list_elements = 0;
1903 if (dwarf2_per_objfile->gdb_index.asection == NULL
1904 || dwarf2_per_objfile->gdb_index.size == 0)
1907 /* Older elfutils strip versions could keep the section in the main
1908 executable while splitting it for the separate debug info file. */
1909 if ((bfd_get_file_flags (dwarf2_per_objfile->gdb_index.asection)
1910 & SEC_HAS_CONTENTS) == 0)
1913 dwarf2_read_section (objfile, &dwarf2_per_objfile->gdb_index);
1915 addr = dwarf2_per_objfile->gdb_index.buffer;
1916 /* Version check. */
1917 version = MAYBE_SWAP (*(offset_type *) addr);
1920 /* Index version 1 neglected to account for .debug_types. So,
1921 if we see .debug_types, we cannot use this index. */
1922 if (dwarf2_per_objfile->types.asection != NULL
1923 && dwarf2_per_objfile->types.size != 0)
1926 else if (version != 2)
1929 map = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct mapped_index);
1930 map->total_size = dwarf2_per_objfile->gdb_index.size;
1932 metadata = (offset_type *) (addr + sizeof (offset_type));
1935 cu_list = addr + MAYBE_SWAP (metadata[i]);
1936 cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i]))
1942 types_list = addr + MAYBE_SWAP (metadata[i]);
1943 types_list_elements = ((MAYBE_SWAP (metadata[i + 1])
1944 - MAYBE_SWAP (metadata[i]))
1949 map->address_table = addr + MAYBE_SWAP (metadata[i]);
1950 map->address_table_size = (MAYBE_SWAP (metadata[i + 1])
1951 - MAYBE_SWAP (metadata[i]));
1954 map->index_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i]));
1955 map->index_table_slots = ((MAYBE_SWAP (metadata[i + 1])
1956 - MAYBE_SWAP (metadata[i]))
1957 / (2 * sizeof (offset_type)));
1960 map->constant_pool = addr + MAYBE_SWAP (metadata[i]);
1962 if (!create_cus_from_index (objfile, cu_list, cu_list_elements))
1966 && types_list_elements
1967 && !create_signatured_type_table_from_index (objfile, types_list,
1968 types_list_elements))
1971 create_addrmap_from_index (objfile, map);
1973 dwarf2_per_objfile->index_table = map;
1974 dwarf2_per_objfile->using_index = 1;
1979 /* A helper for the "quick" functions which sets the global
1980 dwarf2_per_objfile according to OBJFILE. */
1982 dw2_setup (struct objfile *objfile)
1984 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
1985 gdb_assert (dwarf2_per_objfile);
1988 /* A helper for the "quick" functions which attempts to read the line
1989 table for THIS_CU. */
1991 dw2_require_line_header (struct objfile *objfile,
1992 struct dwarf2_per_cu_data *this_cu)
1994 bfd *abfd = objfile->obfd;
1995 struct line_header *lh = NULL;
1996 struct attribute *attr;
1997 struct cleanup *cleanups;
1998 struct die_info *comp_unit_die;
1999 struct dwarf2_section_info* sec;
2000 gdb_byte *beg_of_comp_unit, *info_ptr, *buffer;
2001 int has_children, i;
2002 struct dwarf2_cu cu;
2003 unsigned int bytes_read, buffer_size;
2004 struct die_reader_specs reader_specs;
2005 char *name, *comp_dir;
2007 if (this_cu->v.quick->read_lines)
2009 this_cu->v.quick->read_lines = 1;
2011 memset (&cu, 0, sizeof (cu));
2012 cu.objfile = objfile;
2013 obstack_init (&cu.comp_unit_obstack);
2015 cleanups = make_cleanup (free_stack_comp_unit, &cu);
2017 if (this_cu->from_debug_types)
2018 sec = &dwarf2_per_objfile->types;
2020 sec = &dwarf2_per_objfile->info;
2021 dwarf2_read_section (objfile, sec);
2022 buffer_size = sec->size;
2023 buffer = sec->buffer;
2024 info_ptr = buffer + this_cu->offset;
2025 beg_of_comp_unit = info_ptr;
2027 info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
2028 buffer, buffer_size,
2031 /* Complete the cu_header. */
2032 cu.header.offset = beg_of_comp_unit - buffer;
2033 cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
2036 cu.per_cu = this_cu;
2038 dwarf2_read_abbrevs (abfd, &cu);
2039 make_cleanup (dwarf2_free_abbrev_table, &cu);
2041 if (this_cu->from_debug_types)
2042 info_ptr += 8 /*signature*/ + cu.header.offset_size;
2043 init_cu_die_reader (&reader_specs, &cu);
2044 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
2047 attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, &cu);
2050 unsigned int line_offset = DW_UNSND (attr);
2051 lh = dwarf_decode_line_header (line_offset, abfd, &cu);
2055 do_cleanups (cleanups);
2059 find_file_and_directory (comp_unit_die, &cu, &name, &comp_dir);
2061 this_cu->v.quick->lines = lh;
2063 this_cu->v.quick->file_names
2064 = obstack_alloc (&objfile->objfile_obstack,
2065 lh->num_file_names * sizeof (char *));
2066 for (i = 0; i < lh->num_file_names; ++i)
2067 this_cu->v.quick->file_names[i] = file_full_name (i + 1, lh, comp_dir);
2069 do_cleanups (cleanups);
2072 /* A helper for the "quick" functions which computes and caches the
2073 real path for a given file name from the line table.
2074 dw2_require_line_header must have been called before this is
2077 dw2_require_full_path (struct objfile *objfile,
2078 struct dwarf2_per_cu_data *per_cu,
2081 if (!per_cu->v.quick->full_names)
2082 per_cu->v.quick->full_names
2083 = OBSTACK_CALLOC (&objfile->objfile_obstack,
2084 per_cu->v.quick->lines->num_file_names,
2087 if (!per_cu->v.quick->full_names[index])
2088 per_cu->v.quick->full_names[index]
2089 = gdb_realpath (per_cu->v.quick->file_names[index]);
2091 return per_cu->v.quick->full_names[index];
2094 static struct symtab *
2095 dw2_find_last_source_symtab (struct objfile *objfile)
2098 dw2_setup (objfile);
2099 index = dwarf2_per_objfile->n_comp_units - 1;
2100 return dw2_instantiate_symtab (objfile, dw2_get_cu (index));
2104 dw2_forget_cached_source_info (struct objfile *objfile)
2108 dw2_setup (objfile);
2109 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2110 + dwarf2_per_objfile->n_type_comp_units); ++i)
2112 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2114 if (per_cu->v.quick->full_names)
2118 for (j = 0; j < per_cu->v.quick->lines->num_file_names; ++j)
2119 xfree ((void *) per_cu->v.quick->full_names[j]);
2125 dw2_lookup_symtab (struct objfile *objfile, const char *name,
2126 const char *full_path, const char *real_path,
2127 struct symtab **result)
2130 int check_basename = lbasename (name) == name;
2131 struct dwarf2_per_cu_data *base_cu = NULL;
2133 dw2_setup (objfile);
2134 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2135 + dwarf2_per_objfile->n_type_comp_units); ++i)
2138 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2140 if (per_cu->v.quick->symtab)
2143 dw2_require_line_header (objfile, per_cu);
2144 if (!per_cu->v.quick->lines)
2147 for (j = 0; j < per_cu->v.quick->lines->num_file_names; ++j)
2149 const char *this_name = per_cu->v.quick->file_names[j];
2151 if (FILENAME_CMP (name, this_name) == 0)
2153 *result = dw2_instantiate_symtab (objfile, per_cu);
2157 if (check_basename && ! base_cu
2158 && FILENAME_CMP (lbasename (this_name), name) == 0)
2161 if (full_path != NULL)
2163 const char *this_full_name = dw2_require_full_path (objfile,
2167 && FILENAME_CMP (full_path, this_full_name) == 0)
2169 *result = dw2_instantiate_symtab (objfile, per_cu);
2174 if (real_path != NULL)
2176 const char *this_full_name = dw2_require_full_path (objfile,
2179 if (this_full_name != NULL)
2181 char *rp = gdb_realpath (this_full_name);
2182 if (rp != NULL && FILENAME_CMP (real_path, rp) == 0)
2185 *result = dw2_instantiate_symtab (objfile, per_cu);
2196 *result = dw2_instantiate_symtab (objfile, base_cu);
2203 static struct symtab *
2204 dw2_lookup_symbol (struct objfile *objfile, int block_index,
2205 const char *name, domain_enum domain)
2207 /* We do all the work in the pre_expand_symtabs_matching hook
2212 /* A helper function that expands all symtabs that hold an object
2215 dw2_do_expand_symtabs_matching (struct objfile *objfile, const char *name)
2217 dw2_setup (objfile);
2219 if (dwarf2_per_objfile->index_table)
2223 if (find_slot_in_mapped_hash (dwarf2_per_objfile->index_table,
2226 offset_type i, len = MAYBE_SWAP (*vec);
2227 for (i = 0; i < len; ++i)
2229 offset_type cu_index = MAYBE_SWAP (vec[i + 1]);
2230 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (cu_index);
2232 dw2_instantiate_symtab (objfile, per_cu);
2239 dw2_pre_expand_symtabs_matching (struct objfile *objfile,
2240 int kind, const char *name,
2243 dw2_do_expand_symtabs_matching (objfile, name);
2247 dw2_print_stats (struct objfile *objfile)
2251 dw2_setup (objfile);
2253 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2254 + dwarf2_per_objfile->n_type_comp_units); ++i)
2256 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2258 if (!per_cu->v.quick->symtab)
2261 printf_filtered (_(" Number of unread CUs: %d\n"), count);
2265 dw2_dump (struct objfile *objfile)
2267 /* Nothing worth printing. */
2271 dw2_relocate (struct objfile *objfile, struct section_offsets *new_offsets,
2272 struct section_offsets *delta)
2274 /* There's nothing to relocate here. */
2278 dw2_expand_symtabs_for_function (struct objfile *objfile,
2279 const char *func_name)
2281 dw2_do_expand_symtabs_matching (objfile, func_name);
2285 dw2_expand_all_symtabs (struct objfile *objfile)
2289 dw2_setup (objfile);
2291 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2292 + dwarf2_per_objfile->n_type_comp_units); ++i)
2294 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2296 dw2_instantiate_symtab (objfile, per_cu);
2301 dw2_expand_symtabs_with_filename (struct objfile *objfile,
2302 const char *filename)
2306 dw2_setup (objfile);
2307 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2308 + dwarf2_per_objfile->n_type_comp_units); ++i)
2311 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2313 if (per_cu->v.quick->symtab)
2316 dw2_require_line_header (objfile, per_cu);
2317 if (!per_cu->v.quick->lines)
2320 for (j = 0; j < per_cu->v.quick->lines->num_file_names; ++j)
2322 const char *this_name = per_cu->v.quick->file_names[j];
2323 if (strcmp (this_name, filename) == 0)
2325 dw2_instantiate_symtab (objfile, per_cu);
2333 dw2_find_symbol_file (struct objfile *objfile, const char *name)
2335 struct dwarf2_per_cu_data *per_cu;
2338 dw2_setup (objfile);
2340 if (!dwarf2_per_objfile->index_table)
2343 if (!find_slot_in_mapped_hash (dwarf2_per_objfile->index_table,
2347 /* Note that this just looks at the very first one named NAME -- but
2348 actually we are looking for a function. find_main_filename
2349 should be rewritten so that it doesn't require a custom hook. It
2350 could just use the ordinary symbol tables. */
2351 /* vec[0] is the length, which must always be >0. */
2352 per_cu = dw2_get_cu (MAYBE_SWAP (vec[1]));
2354 dw2_require_line_header (objfile, per_cu);
2355 if (!per_cu->v.quick->lines)
2358 return per_cu->v.quick->file_names[per_cu->v.quick->lines->num_file_names - 1];
2362 dw2_map_ada_symtabs (struct objfile *objfile,
2363 int (*wild_match) (const char *, int, const char *),
2364 int (*is_name_suffix) (const char *),
2365 void (*callback) (struct objfile *,
2366 struct symtab *, void *),
2367 const char *name, int global,
2368 domain_enum namespace, int wild,
2371 /* For now, we don't support Ada. Still the function can be called if the
2372 current language is Ada for a non-Ada objfile using GNU index. As Ada
2373 does not look for non-Ada symbols this function should just return. */
2377 dw2_expand_symtabs_matching (struct objfile *objfile,
2378 int (*file_matcher) (const char *, void *),
2379 int (*name_matcher) (const char *, void *),
2386 dw2_setup (objfile);
2387 if (!dwarf2_per_objfile->index_table)
2390 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2391 + dwarf2_per_objfile->n_type_comp_units); ++i)
2394 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2396 per_cu->v.quick->mark = 0;
2397 if (per_cu->v.quick->symtab)
2400 dw2_require_line_header (objfile, per_cu);
2401 if (!per_cu->v.quick->lines)
2404 for (j = 0; j < per_cu->v.quick->lines->num_file_names; ++j)
2406 if (file_matcher (per_cu->v.quick->file_names[j], data))
2408 per_cu->v.quick->mark = 1;
2415 iter < dwarf2_per_objfile->index_table->index_table_slots;
2418 offset_type idx = 2 * iter;
2420 offset_type *vec, vec_len, vec_idx;
2422 if (dwarf2_per_objfile->index_table->index_table[idx] == 0
2423 && dwarf2_per_objfile->index_table->index_table[idx + 1] == 0)
2426 name = (dwarf2_per_objfile->index_table->constant_pool
2427 + dwarf2_per_objfile->index_table->index_table[idx]);
2429 if (! (*name_matcher) (name, data))
2432 /* The name was matched, now expand corresponding CUs that were
2434 vec = (offset_type *) (dwarf2_per_objfile->index_table->constant_pool
2435 + dwarf2_per_objfile->index_table->index_table[idx + 1]);
2436 vec_len = MAYBE_SWAP (vec[0]);
2437 for (vec_idx = 0; vec_idx < vec_len; ++vec_idx)
2439 struct dwarf2_per_cu_data *per_cu;
2441 per_cu = dw2_get_cu (MAYBE_SWAP (vec[vec_idx + 1]));
2442 if (per_cu->v.quick->mark)
2443 dw2_instantiate_symtab (objfile, per_cu);
2448 static struct symtab *
2449 dw2_find_pc_sect_symtab (struct objfile *objfile,
2450 struct minimal_symbol *msymbol,
2452 struct obj_section *section,
2455 struct dwarf2_per_cu_data *data;
2457 dw2_setup (objfile);
2459 if (!objfile->psymtabs_addrmap)
2462 data = addrmap_find (objfile->psymtabs_addrmap, pc);
2466 if (warn_if_readin && data->v.quick->symtab)
2467 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
2468 paddress (get_objfile_arch (objfile), pc));
2470 return dw2_instantiate_symtab (objfile, data);
2474 dw2_map_symbol_names (struct objfile *objfile,
2475 void (*fun) (const char *, void *),
2479 dw2_setup (objfile);
2481 if (!dwarf2_per_objfile->index_table)
2485 iter < dwarf2_per_objfile->index_table->index_table_slots;
2488 offset_type idx = 2 * iter;
2490 offset_type *vec, vec_len, vec_idx;
2492 if (dwarf2_per_objfile->index_table->index_table[idx] == 0
2493 && dwarf2_per_objfile->index_table->index_table[idx + 1] == 0)
2496 name = (dwarf2_per_objfile->index_table->constant_pool
2497 + dwarf2_per_objfile->index_table->index_table[idx]);
2499 (*fun) (name, data);
2504 dw2_map_symbol_filenames (struct objfile *objfile,
2505 void (*fun) (const char *, const char *, void *),
2510 dw2_setup (objfile);
2511 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2512 + dwarf2_per_objfile->n_type_comp_units); ++i)
2515 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2517 if (per_cu->v.quick->symtab)
2520 dw2_require_line_header (objfile, per_cu);
2521 if (!per_cu->v.quick->lines)
2524 for (j = 0; j < per_cu->v.quick->lines->num_file_names; ++j)
2526 const char *this_full_name = dw2_require_full_path (objfile, per_cu,
2528 (*fun) (per_cu->v.quick->file_names[j], this_full_name, data);
2534 dw2_has_symbols (struct objfile *objfile)
2539 const struct quick_symbol_functions dwarf2_gdb_index_functions =
2542 dw2_find_last_source_symtab,
2543 dw2_forget_cached_source_info,
2546 dw2_pre_expand_symtabs_matching,
2550 dw2_expand_symtabs_for_function,
2551 dw2_expand_all_symtabs,
2552 dw2_expand_symtabs_with_filename,
2553 dw2_find_symbol_file,
2554 dw2_map_ada_symtabs,
2555 dw2_expand_symtabs_matching,
2556 dw2_find_pc_sect_symtab,
2557 dw2_map_symbol_names,
2558 dw2_map_symbol_filenames
2561 /* Initialize for reading DWARF for this objfile. Return 0 if this
2562 file will use psymtabs, or 1 if using the GNU index. */
2565 dwarf2_initialize_objfile (struct objfile *objfile)
2567 /* If we're about to read full symbols, don't bother with the
2568 indices. In this case we also don't care if some other debug
2569 format is making psymtabs, because they are all about to be
2571 if ((objfile->flags & OBJF_READNOW))
2575 dwarf2_per_objfile->using_index = 1;
2576 create_all_comp_units (objfile);
2577 create_debug_types_hash_table (objfile);
2579 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2580 + dwarf2_per_objfile->n_type_comp_units); ++i)
2582 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2584 per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2585 struct dwarf2_per_cu_quick_data);
2588 /* Return 1 so that gdb sees the "quick" functions. However,
2589 these functions will be no-ops because we will have expanded
2594 if (dwarf2_read_index (objfile))
2597 dwarf2_build_psymtabs (objfile);
2603 /* Build a partial symbol table. */
2606 dwarf2_build_psymtabs (struct objfile *objfile)
2608 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
2610 init_psymbol_list (objfile, 1024);
2613 dwarf2_build_psymtabs_hard (objfile);
2616 /* Return TRUE if OFFSET is within CU_HEADER. */
2619 offset_in_cu_p (const struct comp_unit_head *cu_header, unsigned int offset)
2621 unsigned int bottom = cu_header->offset;
2622 unsigned int top = (cu_header->offset
2624 + cu_header->initial_length_size);
2626 return (offset >= bottom && offset < top);
2629 /* Read in the comp unit header information from the debug_info at info_ptr.
2630 NOTE: This leaves members offset, first_die_offset to be filled in
2634 read_comp_unit_head (struct comp_unit_head *cu_header,
2635 gdb_byte *info_ptr, bfd *abfd)
2638 unsigned int bytes_read;
2640 cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read);
2641 cu_header->initial_length_size = bytes_read;
2642 cu_header->offset_size = (bytes_read == 4) ? 4 : 8;
2643 info_ptr += bytes_read;
2644 cu_header->version = read_2_bytes (abfd, info_ptr);
2646 cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
2648 info_ptr += bytes_read;
2649 cu_header->addr_size = read_1_byte (abfd, info_ptr);
2651 signed_addr = bfd_get_sign_extend_vma (abfd);
2652 if (signed_addr < 0)
2653 internal_error (__FILE__, __LINE__,
2654 _("read_comp_unit_head: dwarf from non elf file"));
2655 cu_header->signed_addr_p = signed_addr;
2661 partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
2662 gdb_byte *buffer, unsigned int buffer_size,
2665 gdb_byte *beg_of_comp_unit = info_ptr;
2667 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
2669 if (header->version != 2 && header->version != 3 && header->version != 4)
2670 error (_("Dwarf Error: wrong version in compilation unit header "
2671 "(is %d, should be 2, 3, or 4) [in module %s]"), header->version,
2672 bfd_get_filename (abfd));
2674 if (header->abbrev_offset >= dwarf2_per_objfile->abbrev.size)
2675 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
2676 "(offset 0x%lx + 6) [in module %s]"),
2677 (long) header->abbrev_offset,
2678 (long) (beg_of_comp_unit - buffer),
2679 bfd_get_filename (abfd));
2681 if (beg_of_comp_unit + header->length + header->initial_length_size
2682 > buffer + buffer_size)
2683 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
2684 "(offset 0x%lx + 0) [in module %s]"),
2685 (long) header->length,
2686 (long) (beg_of_comp_unit - buffer),
2687 bfd_get_filename (abfd));
2692 /* Read in the types comp unit header information from .debug_types entry at
2693 types_ptr. The result is a pointer to one past the end of the header. */
2696 read_type_comp_unit_head (struct comp_unit_head *cu_header,
2697 ULONGEST *signature,
2698 gdb_byte *types_ptr, bfd *abfd)
2700 gdb_byte *initial_types_ptr = types_ptr;
2702 dwarf2_read_section (dwarf2_per_objfile->objfile,
2703 &dwarf2_per_objfile->types);
2704 cu_header->offset = types_ptr - dwarf2_per_objfile->types.buffer;
2706 types_ptr = read_comp_unit_head (cu_header, types_ptr, abfd);
2708 *signature = read_8_bytes (abfd, types_ptr);
2710 types_ptr += cu_header->offset_size;
2711 cu_header->first_die_offset = types_ptr - initial_types_ptr;
2716 /* Allocate a new partial symtab for file named NAME and mark this new
2717 partial symtab as being an include of PST. */
2720 dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
2721 struct objfile *objfile)
2723 struct partial_symtab *subpst = allocate_psymtab (name, objfile);
2725 subpst->section_offsets = pst->section_offsets;
2726 subpst->textlow = 0;
2727 subpst->texthigh = 0;
2729 subpst->dependencies = (struct partial_symtab **)
2730 obstack_alloc (&objfile->objfile_obstack,
2731 sizeof (struct partial_symtab *));
2732 subpst->dependencies[0] = pst;
2733 subpst->number_of_dependencies = 1;
2735 subpst->globals_offset = 0;
2736 subpst->n_global_syms = 0;
2737 subpst->statics_offset = 0;
2738 subpst->n_static_syms = 0;
2739 subpst->symtab = NULL;
2740 subpst->read_symtab = pst->read_symtab;
2743 /* No private part is necessary for include psymtabs. This property
2744 can be used to differentiate between such include psymtabs and
2745 the regular ones. */
2746 subpst->read_symtab_private = NULL;
2749 /* Read the Line Number Program data and extract the list of files
2750 included by the source file represented by PST. Build an include
2751 partial symtab for each of these included files. */
2754 dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
2755 struct die_info *die,
2756 struct partial_symtab *pst)
2758 struct objfile *objfile = cu->objfile;
2759 bfd *abfd = objfile->obfd;
2760 struct line_header *lh = NULL;
2761 struct attribute *attr;
2763 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
2766 unsigned int line_offset = DW_UNSND (attr);
2768 lh = dwarf_decode_line_header (line_offset, abfd, cu);
2771 return; /* No linetable, so no includes. */
2773 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
2774 dwarf_decode_lines (lh, pst->dirname, abfd, cu, pst);
2776 free_line_header (lh);
2780 hash_type_signature (const void *item)
2782 const struct signatured_type *type_sig = item;
2784 /* This drops the top 32 bits of the signature, but is ok for a hash. */
2785 return type_sig->signature;
2789 eq_type_signature (const void *item_lhs, const void *item_rhs)
2791 const struct signatured_type *lhs = item_lhs;
2792 const struct signatured_type *rhs = item_rhs;
2794 return lhs->signature == rhs->signature;
2797 /* Allocate a hash table for signatured types. */
2800 allocate_signatured_type_table (struct objfile *objfile)
2802 return htab_create_alloc_ex (41,
2803 hash_type_signature,
2806 &objfile->objfile_obstack,
2807 hashtab_obstack_allocate,
2808 dummy_obstack_deallocate);
2811 /* A helper function to add a signatured type CU to a list. */
2814 add_signatured_type_cu_to_list (void **slot, void *datum)
2816 struct signatured_type *sigt = *slot;
2817 struct dwarf2_per_cu_data ***datap = datum;
2819 **datap = &sigt->per_cu;
2825 /* Create the hash table of all entries in the .debug_types section.
2826 The result is zero if there is an error (e.g. missing .debug_types section),
2827 otherwise non-zero. */
2830 create_debug_types_hash_table (struct objfile *objfile)
2834 struct dwarf2_per_cu_data **iter;
2836 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
2837 info_ptr = dwarf2_per_objfile->types.buffer;
2839 if (info_ptr == NULL)
2841 dwarf2_per_objfile->signatured_types = NULL;
2845 types_htab = allocate_signatured_type_table (objfile);
2847 if (dwarf2_die_debug)
2848 fprintf_unfiltered (gdb_stdlog, "Signatured types:\n");
2850 while (info_ptr < dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
2852 unsigned int offset;
2853 unsigned int offset_size;
2854 unsigned int type_offset;
2855 unsigned int length, initial_length_size;
2856 unsigned short version;
2858 struct signatured_type *type_sig;
2860 gdb_byte *ptr = info_ptr;
2862 offset = ptr - dwarf2_per_objfile->types.buffer;
2864 /* We need to read the type's signature in order to build the hash
2865 table, but we don't need to read anything else just yet. */
2867 /* Sanity check to ensure entire cu is present. */
2868 length = read_initial_length (objfile->obfd, ptr, &initial_length_size);
2869 if (ptr + length + initial_length_size
2870 > dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
2872 complaint (&symfile_complaints,
2873 _("debug type entry runs off end of `.debug_types' section, ignored"));
2877 offset_size = initial_length_size == 4 ? 4 : 8;
2878 ptr += initial_length_size;
2879 version = bfd_get_16 (objfile->obfd, ptr);
2881 ptr += offset_size; /* abbrev offset */
2882 ptr += 1; /* address size */
2883 signature = bfd_get_64 (objfile->obfd, ptr);
2885 type_offset = read_offset_1 (objfile->obfd, ptr, offset_size);
2887 type_sig = obstack_alloc (&objfile->objfile_obstack, sizeof (*type_sig));
2888 memset (type_sig, 0, sizeof (*type_sig));
2889 type_sig->signature = signature;
2890 type_sig->offset = offset;
2891 type_sig->type_offset = type_offset;
2892 type_sig->per_cu.objfile = objfile;
2893 type_sig->per_cu.from_debug_types = 1;
2895 slot = htab_find_slot (types_htab, type_sig, INSERT);
2896 gdb_assert (slot != NULL);
2899 if (dwarf2_die_debug)
2900 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n",
2901 offset, phex (signature, sizeof (signature)));
2903 info_ptr = info_ptr + initial_length_size + length;
2906 dwarf2_per_objfile->signatured_types = types_htab;
2908 dwarf2_per_objfile->n_type_comp_units = htab_elements (types_htab);
2909 dwarf2_per_objfile->type_comp_units
2910 = obstack_alloc (&objfile->objfile_obstack,
2911 dwarf2_per_objfile->n_type_comp_units
2912 * sizeof (struct dwarf2_per_cu_data *));
2913 iter = &dwarf2_per_objfile->type_comp_units[0];
2914 htab_traverse_noresize (types_htab, add_signatured_type_cu_to_list, &iter);
2915 gdb_assert (iter - &dwarf2_per_objfile->type_comp_units[0]
2916 == dwarf2_per_objfile->n_type_comp_units);
2921 /* Lookup a signature based type.
2922 Returns NULL if SIG is not present in the table. */
2924 static struct signatured_type *
2925 lookup_signatured_type (struct objfile *objfile, ULONGEST sig)
2927 struct signatured_type find_entry, *entry;
2929 if (dwarf2_per_objfile->signatured_types == NULL)
2931 complaint (&symfile_complaints,
2932 _("missing `.debug_types' section for DW_FORM_sig8 die"));
2936 find_entry.signature = sig;
2937 entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
2941 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
2944 init_cu_die_reader (struct die_reader_specs *reader,
2945 struct dwarf2_cu *cu)
2947 reader->abfd = cu->objfile->obfd;
2949 if (cu->per_cu->from_debug_types)
2951 gdb_assert (dwarf2_per_objfile->types.readin);
2952 reader->buffer = dwarf2_per_objfile->types.buffer;
2956 gdb_assert (dwarf2_per_objfile->info.readin);
2957 reader->buffer = dwarf2_per_objfile->info.buffer;
2961 /* Find the base address of the compilation unit for range lists and
2962 location lists. It will normally be specified by DW_AT_low_pc.
2963 In DWARF-3 draft 4, the base address could be overridden by
2964 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2965 compilation units with discontinuous ranges. */
2968 dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu)
2970 struct attribute *attr;
2973 cu->base_address = 0;
2975 attr = dwarf2_attr (die, DW_AT_entry_pc, cu);
2978 cu->base_address = DW_ADDR (attr);
2983 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
2986 cu->base_address = DW_ADDR (attr);
2992 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
2993 to combine the common parts.
2994 Process a compilation unit for a psymtab.
2995 BUFFER is a pointer to the beginning of the dwarf section buffer,
2996 either .debug_info or debug_types.
2997 INFO_PTR is a pointer to the start of the CU.
2998 Returns a pointer to the next CU. */
3001 process_psymtab_comp_unit (struct objfile *objfile,
3002 struct dwarf2_per_cu_data *this_cu,
3003 gdb_byte *buffer, gdb_byte *info_ptr,
3004 unsigned int buffer_size)
3006 bfd *abfd = objfile->obfd;
3007 gdb_byte *beg_of_comp_unit = info_ptr;
3008 struct die_info *comp_unit_die;
3009 struct partial_symtab *pst;
3011 struct cleanup *back_to_inner;
3012 struct dwarf2_cu cu;
3013 int has_children, has_pc_info;
3014 struct attribute *attr;
3015 CORE_ADDR best_lowpc = 0, best_highpc = 0;
3016 struct die_reader_specs reader_specs;
3018 memset (&cu, 0, sizeof (cu));
3019 cu.objfile = objfile;
3020 obstack_init (&cu.comp_unit_obstack);
3022 back_to_inner = make_cleanup (free_stack_comp_unit, &cu);
3024 info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
3025 buffer, buffer_size,
3028 /* Complete the cu_header. */
3029 cu.header.offset = beg_of_comp_unit - buffer;
3030 cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
3032 cu.list_in_scope = &file_symbols;
3034 /* If this compilation unit was already read in, free the
3035 cached copy in order to read it in again. This is
3036 necessary because we skipped some symbols when we first
3037 read in the compilation unit (see load_partial_dies).
3038 This problem could be avoided, but the benefit is
3040 if (this_cu->cu != NULL)
3041 free_one_cached_comp_unit (this_cu->cu);
3043 /* Note that this is a pointer to our stack frame, being
3044 added to a global data structure. It will be cleaned up
3045 in free_stack_comp_unit when we finish with this
3046 compilation unit. */
3048 cu.per_cu = this_cu;
3050 /* Read the abbrevs for this compilation unit into a table. */
3051 dwarf2_read_abbrevs (abfd, &cu);
3052 make_cleanup (dwarf2_free_abbrev_table, &cu);
3054 /* Read the compilation unit die. */
3055 if (this_cu->from_debug_types)
3056 info_ptr += 8 /*signature*/ + cu.header.offset_size;
3057 init_cu_die_reader (&reader_specs, &cu);
3058 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
3061 if (this_cu->from_debug_types)
3063 /* offset,length haven't been set yet for type units. */
3064 this_cu->offset = cu.header.offset;
3065 this_cu->length = cu.header.length + cu.header.initial_length_size;
3067 else if (comp_unit_die->tag == DW_TAG_partial_unit)
3069 info_ptr = (beg_of_comp_unit + cu.header.length
3070 + cu.header.initial_length_size);
3071 do_cleanups (back_to_inner);
3075 /* Set the language we're debugging. */
3076 attr = dwarf2_attr (comp_unit_die, DW_AT_language, &cu);
3078 set_cu_language (DW_UNSND (attr), &cu);
3080 set_cu_language (language_minimal, &cu);
3082 /* Allocate a new partial symbol table structure. */
3083 attr = dwarf2_attr (comp_unit_die, DW_AT_name, &cu);
3084 pst = start_psymtab_common (objfile, objfile->section_offsets,
3085 (attr != NULL) ? DW_STRING (attr) : "",
3086 /* TEXTLOW and TEXTHIGH are set below. */
3088 objfile->global_psymbols.next,
3089 objfile->static_psymbols.next);
3091 attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, &cu);
3093 pst->dirname = DW_STRING (attr);
3095 pst->read_symtab_private = this_cu;
3097 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3099 /* Store the function that reads in the rest of the symbol table */
3100 pst->read_symtab = dwarf2_psymtab_to_symtab;
3102 this_cu->v.psymtab = pst;
3104 dwarf2_find_base_address (comp_unit_die, &cu);
3106 /* Possibly set the default values of LOWPC and HIGHPC from
3108 has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc,
3109 &best_highpc, &cu, pst);
3110 if (has_pc_info == 1 && best_lowpc < best_highpc)
3111 /* Store the contiguous range if it is not empty; it can be empty for
3112 CUs with no code. */
3113 addrmap_set_empty (objfile->psymtabs_addrmap,
3114 best_lowpc + baseaddr,
3115 best_highpc + baseaddr - 1, pst);
3117 /* Check if comp unit has_children.
3118 If so, read the rest of the partial symbols from this comp unit.
3119 If not, there's no more debug_info for this comp unit. */
3122 struct partial_die_info *first_die;
3123 CORE_ADDR lowpc, highpc;
3125 lowpc = ((CORE_ADDR) -1);
3126 highpc = ((CORE_ADDR) 0);
3128 first_die = load_partial_dies (abfd, buffer, info_ptr, 1, &cu);
3130 scan_partial_symbols (first_die, &lowpc, &highpc,
3131 ! has_pc_info, &cu);
3133 /* If we didn't find a lowpc, set it to highpc to avoid
3134 complaints from `maint check'. */
3135 if (lowpc == ((CORE_ADDR) -1))
3138 /* If the compilation unit didn't have an explicit address range,
3139 then use the information extracted from its child dies. */
3143 best_highpc = highpc;
3146 pst->textlow = best_lowpc + baseaddr;
3147 pst->texthigh = best_highpc + baseaddr;
3149 pst->n_global_syms = objfile->global_psymbols.next -
3150 (objfile->global_psymbols.list + pst->globals_offset);
3151 pst->n_static_syms = objfile->static_psymbols.next -
3152 (objfile->static_psymbols.list + pst->statics_offset);
3153 sort_pst_symbols (pst);
3155 info_ptr = (beg_of_comp_unit + cu.header.length
3156 + cu.header.initial_length_size);
3158 if (this_cu->from_debug_types)
3160 /* It's not clear we want to do anything with stmt lists here.
3161 Waiting to see what gcc ultimately does. */
3165 /* Get the list of files included in the current compilation unit,
3166 and build a psymtab for each of them. */
3167 dwarf2_build_include_psymtabs (&cu, comp_unit_die, pst);
3170 do_cleanups (back_to_inner);
3175 /* Traversal function for htab_traverse_noresize.
3176 Process one .debug_types comp-unit. */
3179 process_type_comp_unit (void **slot, void *info)
3181 struct signatured_type *entry = (struct signatured_type *) *slot;
3182 struct objfile *objfile = (struct objfile *) info;
3183 struct dwarf2_per_cu_data *this_cu;
3185 this_cu = &entry->per_cu;
3187 gdb_assert (dwarf2_per_objfile->types.readin);
3188 process_psymtab_comp_unit (objfile, this_cu,
3189 dwarf2_per_objfile->types.buffer,
3190 dwarf2_per_objfile->types.buffer + entry->offset,
3191 dwarf2_per_objfile->types.size);
3196 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
3197 Build partial symbol tables for the .debug_types comp-units. */
3200 build_type_psymtabs (struct objfile *objfile)
3202 if (! create_debug_types_hash_table (objfile))
3205 htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
3206 process_type_comp_unit, objfile);
3209 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
3212 psymtabs_addrmap_cleanup (void *o)
3214 struct objfile *objfile = o;
3216 objfile->psymtabs_addrmap = NULL;
3219 /* Build the partial symbol table by doing a quick pass through the
3220 .debug_info and .debug_abbrev sections. */
3223 dwarf2_build_psymtabs_hard (struct objfile *objfile)
3226 struct cleanup *back_to, *addrmap_cleanup;
3227 struct obstack temp_obstack;
3229 dwarf2_per_objfile->reading_partial_symbols = 1;
3231 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
3232 info_ptr = dwarf2_per_objfile->info.buffer;
3234 /* Any cached compilation units will be linked by the per-objfile
3235 read_in_chain. Make sure to free them when we're done. */
3236 back_to = make_cleanup (free_cached_comp_units, NULL);
3238 build_type_psymtabs (objfile);
3240 create_all_comp_units (objfile);
3242 /* Create a temporary address map on a temporary obstack. We later
3243 copy this to the final obstack. */
3244 obstack_init (&temp_obstack);
3245 make_cleanup_obstack_free (&temp_obstack);
3246 objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack);
3247 addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile);
3249 /* Since the objects we're extracting from .debug_info vary in
3250 length, only the individual functions to extract them (like
3251 read_comp_unit_head and load_partial_die) can really know whether
3252 the buffer is large enough to hold another complete object.
3254 At the moment, they don't actually check that. If .debug_info
3255 holds just one extra byte after the last compilation unit's dies,
3256 then read_comp_unit_head will happily read off the end of the
3257 buffer. read_partial_die is similarly casual. Those functions
3260 For this loop condition, simply checking whether there's any data
3261 left at all should be sufficient. */
3263 while (info_ptr < (dwarf2_per_objfile->info.buffer
3264 + dwarf2_per_objfile->info.size))
3266 struct dwarf2_per_cu_data *this_cu;
3268 this_cu = dwarf2_find_comp_unit (info_ptr - dwarf2_per_objfile->info.buffer,
3271 info_ptr = process_psymtab_comp_unit (objfile, this_cu,
3272 dwarf2_per_objfile->info.buffer,
3274 dwarf2_per_objfile->info.size);
3277 objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
3278 &objfile->objfile_obstack);
3279 discard_cleanups (addrmap_cleanup);
3281 do_cleanups (back_to);
3284 /* Load the partial DIEs for a secondary CU into memory. */
3287 load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu,
3288 struct objfile *objfile)
3290 bfd *abfd = objfile->obfd;
3291 gdb_byte *info_ptr, *beg_of_comp_unit;
3292 struct die_info *comp_unit_die;
3293 struct dwarf2_cu *cu;
3294 struct cleanup *free_abbrevs_cleanup, *free_cu_cleanup = NULL;
3295 struct attribute *attr;
3297 struct die_reader_specs reader_specs;
3300 gdb_assert (! this_cu->from_debug_types);
3302 gdb_assert (dwarf2_per_objfile->info.readin);
3303 info_ptr = dwarf2_per_objfile->info.buffer + this_cu->offset;
3304 beg_of_comp_unit = info_ptr;
3306 if (this_cu->cu == NULL)
3308 cu = alloc_one_comp_unit (objfile);
3312 /* If an error occurs while loading, release our storage. */
3313 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
3315 info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr,
3316 dwarf2_per_objfile->info.buffer,
3317 dwarf2_per_objfile->info.size,
3320 /* Complete the cu_header. */
3321 cu->header.offset = this_cu->offset;
3322 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
3324 /* Link this compilation unit into the compilation unit tree. */
3326 cu->per_cu = this_cu;
3328 /* Link this CU into read_in_chain. */
3329 this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
3330 dwarf2_per_objfile->read_in_chain = this_cu;
3335 info_ptr += cu->header.first_die_offset;
3338 /* Read the abbrevs for this compilation unit into a table. */
3339 gdb_assert (cu->dwarf2_abbrevs == NULL);
3340 dwarf2_read_abbrevs (abfd, cu);
3341 free_abbrevs_cleanup = make_cleanup (dwarf2_free_abbrev_table, cu);
3343 /* Read the compilation unit die. */
3344 init_cu_die_reader (&reader_specs, cu);
3345 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
3348 /* Set the language we're debugging. */
3349 attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu);
3351 set_cu_language (DW_UNSND (attr), cu);
3353 set_cu_language (language_minimal, cu);
3355 /* Check if comp unit has_children.
3356 If so, read the rest of the partial symbols from this comp unit.
3357 If not, there's no more debug_info for this comp unit. */
3359 load_partial_dies (abfd, dwarf2_per_objfile->info.buffer, info_ptr, 0, cu);
3361 do_cleanups (free_abbrevs_cleanup);
3365 /* We've successfully allocated this compilation unit. Let our
3366 caller clean it up when finished with it. */
3367 discard_cleanups (free_cu_cleanup);
3371 /* Create a list of all compilation units in OBJFILE. We do this only
3372 if an inter-comp-unit reference is found; presumably if there is one,
3373 there will be many, and one will occur early in the .debug_info section.
3374 So there's no point in building this list incrementally. */
3377 create_all_comp_units (struct objfile *objfile)
3381 struct dwarf2_per_cu_data **all_comp_units;
3384 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
3385 info_ptr = dwarf2_per_objfile->info.buffer;
3389 all_comp_units = xmalloc (n_allocated
3390 * sizeof (struct dwarf2_per_cu_data *));
3392 while (info_ptr < dwarf2_per_objfile->info.buffer + dwarf2_per_objfile->info.size)
3394 unsigned int length, initial_length_size;
3395 struct dwarf2_per_cu_data *this_cu;
3396 unsigned int offset;
3398 offset = info_ptr - dwarf2_per_objfile->info.buffer;
3400 /* Read just enough information to find out where the next
3401 compilation unit is. */
3402 length = read_initial_length (objfile->obfd, info_ptr,
3403 &initial_length_size);
3405 /* Save the compilation unit for later lookup. */
3406 this_cu = obstack_alloc (&objfile->objfile_obstack,
3407 sizeof (struct dwarf2_per_cu_data));
3408 memset (this_cu, 0, sizeof (*this_cu));
3409 this_cu->offset = offset;
3410 this_cu->length = length + initial_length_size;
3411 this_cu->objfile = objfile;
3413 if (n_comp_units == n_allocated)
3416 all_comp_units = xrealloc (all_comp_units,
3418 * sizeof (struct dwarf2_per_cu_data *));
3420 all_comp_units[n_comp_units++] = this_cu;
3422 info_ptr = info_ptr + this_cu->length;
3425 dwarf2_per_objfile->all_comp_units
3426 = obstack_alloc (&objfile->objfile_obstack,
3427 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
3428 memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
3429 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
3430 xfree (all_comp_units);
3431 dwarf2_per_objfile->n_comp_units = n_comp_units;
3434 /* Process all loaded DIEs for compilation unit CU, starting at
3435 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
3436 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
3437 DW_AT_ranges). If NEED_PC is set, then this function will set
3438 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
3439 and record the covered ranges in the addrmap. */
3442 scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
3443 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
3445 struct partial_die_info *pdi;
3447 /* Now, march along the PDI's, descending into ones which have
3448 interesting children but skipping the children of the other ones,
3449 until we reach the end of the compilation unit. */
3455 fixup_partial_die (pdi, cu);
3457 /* Anonymous namespaces or modules have no name but have interesting
3458 children, so we need to look at them. Ditto for anonymous
3461 if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
3462 || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type)
3466 case DW_TAG_subprogram:
3467 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
3469 case DW_TAG_constant:
3470 case DW_TAG_variable:
3471 case DW_TAG_typedef:
3472 case DW_TAG_union_type:
3473 if (!pdi->is_declaration)
3475 add_partial_symbol (pdi, cu);
3478 case DW_TAG_class_type:
3479 case DW_TAG_interface_type:
3480 case DW_TAG_structure_type:
3481 if (!pdi->is_declaration)
3483 add_partial_symbol (pdi, cu);
3486 case DW_TAG_enumeration_type:
3487 if (!pdi->is_declaration)
3488 add_partial_enumeration (pdi, cu);
3490 case DW_TAG_base_type:
3491 case DW_TAG_subrange_type:
3492 /* File scope base type definitions are added to the partial
3494 add_partial_symbol (pdi, cu);
3496 case DW_TAG_namespace:
3497 add_partial_namespace (pdi, lowpc, highpc, need_pc, cu);
3500 add_partial_module (pdi, lowpc, highpc, need_pc, cu);
3507 /* If the die has a sibling, skip to the sibling. */
3509 pdi = pdi->die_sibling;
3513 /* Functions used to compute the fully scoped name of a partial DIE.
3515 Normally, this is simple. For C++, the parent DIE's fully scoped
3516 name is concatenated with "::" and the partial DIE's name. For
3517 Java, the same thing occurs except that "." is used instead of "::".
3518 Enumerators are an exception; they use the scope of their parent
3519 enumeration type, i.e. the name of the enumeration type is not
3520 prepended to the enumerator.
3522 There are two complexities. One is DW_AT_specification; in this
3523 case "parent" means the parent of the target of the specification,
3524 instead of the direct parent of the DIE. The other is compilers
3525 which do not emit DW_TAG_namespace; in this case we try to guess
3526 the fully qualified name of structure types from their members'
3527 linkage names. This must be done using the DIE's children rather
3528 than the children of any DW_AT_specification target. We only need
3529 to do this for structures at the top level, i.e. if the target of
3530 any DW_AT_specification (if any; otherwise the DIE itself) does not
3533 /* Compute the scope prefix associated with PDI's parent, in
3534 compilation unit CU. The result will be allocated on CU's
3535 comp_unit_obstack, or a copy of the already allocated PDI->NAME
3536 field. NULL is returned if no prefix is necessary. */
3538 partial_die_parent_scope (struct partial_die_info *pdi,
3539 struct dwarf2_cu *cu)
3541 char *grandparent_scope;
3542 struct partial_die_info *parent, *real_pdi;
3544 /* We need to look at our parent DIE; if we have a DW_AT_specification,
3545 then this means the parent of the specification DIE. */
3548 while (real_pdi->has_specification)
3549 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
3551 parent = real_pdi->die_parent;
3555 if (parent->scope_set)
3556 return parent->scope;
3558 fixup_partial_die (parent, cu);
3560 grandparent_scope = partial_die_parent_scope (parent, cu);
3562 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
3563 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
3564 Work around this problem here. */
3565 if (cu->language == language_cplus
3566 && parent->tag == DW_TAG_namespace
3567 && strcmp (parent->name, "::") == 0
3568 && grandparent_scope == NULL)
3570 parent->scope = NULL;
3571 parent->scope_set = 1;
3575 if (parent->tag == DW_TAG_namespace
3576 || parent->tag == DW_TAG_module
3577 || parent->tag == DW_TAG_structure_type
3578 || parent->tag == DW_TAG_class_type
3579 || parent->tag == DW_TAG_interface_type
3580 || parent->tag == DW_TAG_union_type
3581 || parent->tag == DW_TAG_enumeration_type)
3583 if (grandparent_scope == NULL)
3584 parent->scope = parent->name;
3586 parent->scope = typename_concat (&cu->comp_unit_obstack, grandparent_scope,
3587 parent->name, 0, cu);
3589 else if (parent->tag == DW_TAG_enumerator)
3590 /* Enumerators should not get the name of the enumeration as a prefix. */
3591 parent->scope = grandparent_scope;
3594 /* FIXME drow/2004-04-01: What should we be doing with
3595 function-local names? For partial symbols, we should probably be
3597 complaint (&symfile_complaints,
3598 _("unhandled containing DIE tag %d for DIE at %d"),
3599 parent->tag, pdi->offset);
3600 parent->scope = grandparent_scope;
3603 parent->scope_set = 1;
3604 return parent->scope;
3607 /* Return the fully scoped name associated with PDI, from compilation unit
3608 CU. The result will be allocated with malloc. */
3610 partial_die_full_name (struct partial_die_info *pdi,
3611 struct dwarf2_cu *cu)
3615 /* If this is a template instantiation, we can not work out the
3616 template arguments from partial DIEs. So, unfortunately, we have
3617 to go through the full DIEs. At least any work we do building
3618 types here will be reused if full symbols are loaded later. */
3619 if (pdi->has_template_arguments)
3621 fixup_partial_die (pdi, cu);
3623 if (pdi->name != NULL && strchr (pdi->name, '<') == NULL)
3625 struct die_info *die;
3626 struct attribute attr;
3627 struct dwarf2_cu *ref_cu = cu;
3630 attr.form = DW_FORM_ref_addr;
3631 attr.u.addr = pdi->offset;
3632 die = follow_die_ref (NULL, &attr, &ref_cu);
3634 return xstrdup (dwarf2_full_name (NULL, die, ref_cu));
3638 parent_scope = partial_die_parent_scope (pdi, cu);
3639 if (parent_scope == NULL)
3642 return typename_concat (NULL, parent_scope, pdi->name, 0, cu);
3646 add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
3648 struct objfile *objfile = cu->objfile;
3650 char *actual_name = NULL;
3651 const struct partial_symbol *psym = NULL;
3653 int built_actual_name = 0;
3655 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3657 actual_name = partial_die_full_name (pdi, cu);
3659 built_actual_name = 1;
3661 if (actual_name == NULL)
3662 actual_name = pdi->name;
3666 case DW_TAG_subprogram:
3667 if (pdi->is_external || cu->language == language_ada)
3669 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
3670 of the global scope. But in Ada, we want to be able to access
3671 nested procedures globally. So all Ada subprograms are stored
3672 in the global scope. */
3673 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3674 mst_text, objfile); */
3675 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
3677 VAR_DOMAIN, LOC_BLOCK,
3678 &objfile->global_psymbols,
3679 0, pdi->lowpc + baseaddr,
3680 cu->language, objfile);
3684 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3685 mst_file_text, objfile); */
3686 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
3688 VAR_DOMAIN, LOC_BLOCK,
3689 &objfile->static_psymbols,
3690 0, pdi->lowpc + baseaddr,
3691 cu->language, objfile);
3694 case DW_TAG_constant:
3696 struct psymbol_allocation_list *list;
3698 if (pdi->is_external)
3699 list = &objfile->global_psymbols;
3701 list = &objfile->static_psymbols;
3702 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
3703 built_actual_name, VAR_DOMAIN, LOC_STATIC,
3704 list, 0, 0, cu->language, objfile);
3708 case DW_TAG_variable:
3710 addr = decode_locdesc (pdi->locdesc, cu);
3714 && !dwarf2_per_objfile->has_section_at_zero)
3716 /* A global or static variable may also have been stripped
3717 out by the linker if unused, in which case its address
3718 will be nullified; do not add such variables into partial
3719 symbol table then. */
3721 else if (pdi->is_external)
3724 Don't enter into the minimal symbol tables as there is
3725 a minimal symbol table entry from the ELF symbols already.
3726 Enter into partial symbol table if it has a location
3727 descriptor or a type.
3728 If the location descriptor is missing, new_symbol will create
3729 a LOC_UNRESOLVED symbol, the address of the variable will then
3730 be determined from the minimal symbol table whenever the variable
3732 The address for the partial symbol table entry is not
3733 used by GDB, but it comes in handy for debugging partial symbol
3736 if (pdi->locdesc || pdi->has_type)
3737 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
3739 VAR_DOMAIN, LOC_STATIC,
3740 &objfile->global_psymbols,
3742 cu->language, objfile);
3746 /* Static Variable. Skip symbols without location descriptors. */
3747 if (pdi->locdesc == NULL)
3749 if (built_actual_name)
3750 xfree (actual_name);
3753 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
3754 mst_file_data, objfile); */
3755 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
3757 VAR_DOMAIN, LOC_STATIC,
3758 &objfile->static_psymbols,
3760 cu->language, objfile);
3763 case DW_TAG_typedef:
3764 case DW_TAG_base_type:
3765 case DW_TAG_subrange_type:
3766 add_psymbol_to_list (actual_name, strlen (actual_name),
3768 VAR_DOMAIN, LOC_TYPEDEF,
3769 &objfile->static_psymbols,
3770 0, (CORE_ADDR) 0, cu->language, objfile);
3772 case DW_TAG_namespace:
3773 add_psymbol_to_list (actual_name, strlen (actual_name),
3775 VAR_DOMAIN, LOC_TYPEDEF,
3776 &objfile->global_psymbols,
3777 0, (CORE_ADDR) 0, cu->language, objfile);
3779 case DW_TAG_class_type:
3780 case DW_TAG_interface_type:
3781 case DW_TAG_structure_type:
3782 case DW_TAG_union_type:
3783 case DW_TAG_enumeration_type:
3784 /* Skip external references. The DWARF standard says in the section
3785 about "Structure, Union, and Class Type Entries": "An incomplete
3786 structure, union or class type is represented by a structure,
3787 union or class entry that does not have a byte size attribute
3788 and that has a DW_AT_declaration attribute." */
3789 if (!pdi->has_byte_size && pdi->is_declaration)
3791 if (built_actual_name)
3792 xfree (actual_name);
3796 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
3797 static vs. global. */
3798 add_psymbol_to_list (actual_name, strlen (actual_name),
3800 STRUCT_DOMAIN, LOC_TYPEDEF,
3801 (cu->language == language_cplus
3802 || cu->language == language_java)
3803 ? &objfile->global_psymbols
3804 : &objfile->static_psymbols,
3805 0, (CORE_ADDR) 0, cu->language, objfile);
3808 case DW_TAG_enumerator:
3809 add_psymbol_to_list (actual_name, strlen (actual_name),
3811 VAR_DOMAIN, LOC_CONST,
3812 (cu->language == language_cplus
3813 || cu->language == language_java)
3814 ? &objfile->global_psymbols
3815 : &objfile->static_psymbols,
3816 0, (CORE_ADDR) 0, cu->language, objfile);
3822 if (built_actual_name)
3823 xfree (actual_name);
3826 /* Read a partial die corresponding to a namespace; also, add a symbol
3827 corresponding to that namespace to the symbol table. NAMESPACE is
3828 the name of the enclosing namespace. */
3831 add_partial_namespace (struct partial_die_info *pdi,
3832 CORE_ADDR *lowpc, CORE_ADDR *highpc,
3833 int need_pc, struct dwarf2_cu *cu)
3835 /* Add a symbol for the namespace. */
3837 add_partial_symbol (pdi, cu);
3839 /* Now scan partial symbols in that namespace. */
3841 if (pdi->has_children)
3842 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
3845 /* Read a partial die corresponding to a Fortran module. */
3848 add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
3849 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
3851 /* Now scan partial symbols in that module. */
3853 if (pdi->has_children)
3854 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
3857 /* Read a partial die corresponding to a subprogram and create a partial
3858 symbol for that subprogram. When the CU language allows it, this
3859 routine also defines a partial symbol for each nested subprogram
3860 that this subprogram contains.
3862 DIE my also be a lexical block, in which case we simply search
3863 recursively for suprograms defined inside that lexical block.
3864 Again, this is only performed when the CU language allows this
3865 type of definitions. */
3868 add_partial_subprogram (struct partial_die_info *pdi,
3869 CORE_ADDR *lowpc, CORE_ADDR *highpc,
3870 int need_pc, struct dwarf2_cu *cu)
3872 if (pdi->tag == DW_TAG_subprogram)
3874 if (pdi->has_pc_info)
3876 if (pdi->lowpc < *lowpc)
3877 *lowpc = pdi->lowpc;
3878 if (pdi->highpc > *highpc)
3879 *highpc = pdi->highpc;
3883 struct objfile *objfile = cu->objfile;
3885 baseaddr = ANOFFSET (objfile->section_offsets,
3886 SECT_OFF_TEXT (objfile));
3887 addrmap_set_empty (objfile->psymtabs_addrmap,
3888 pdi->lowpc + baseaddr,
3889 pdi->highpc - 1 + baseaddr,
3890 cu->per_cu->v.psymtab);
3892 if (!pdi->is_declaration)
3893 /* Ignore subprogram DIEs that do not have a name, they are
3894 illegal. Do not emit a complaint at this point, we will
3895 do so when we convert this psymtab into a symtab. */
3897 add_partial_symbol (pdi, cu);
3901 if (! pdi->has_children)
3904 if (cu->language == language_ada)
3906 pdi = pdi->die_child;
3909 fixup_partial_die (pdi, cu);
3910 if (pdi->tag == DW_TAG_subprogram
3911 || pdi->tag == DW_TAG_lexical_block)
3912 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
3913 pdi = pdi->die_sibling;
3918 /* See if we can figure out if the class lives in a namespace. We do
3919 this by looking for a member function; its demangled name will
3920 contain namespace info, if there is any. */
3923 guess_structure_name (struct partial_die_info *struct_pdi,
3924 struct dwarf2_cu *cu)
3926 if ((cu->language == language_cplus
3927 || cu->language == language_java)
3928 && cu->has_namespace_info == 0
3929 && struct_pdi->has_children)
3931 /* NOTE: carlton/2003-10-07: Getting the info this way changes
3932 what template types look like, because the demangler
3933 frequently doesn't give the same name as the debug info. We
3934 could fix this by only using the demangled name to get the
3935 prefix (but see comment in read_structure_type). */
3937 struct partial_die_info *real_pdi;
3939 /* If this DIE (this DIE's specification, if any) has a parent, then
3940 we should not do this. We'll prepend the parent's fully qualified
3941 name when we create the partial symbol. */
3943 real_pdi = struct_pdi;
3944 while (real_pdi->has_specification)
3945 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
3947 if (real_pdi->die_parent != NULL)
3952 /* Read a partial die corresponding to an enumeration type. */
3955 add_partial_enumeration (struct partial_die_info *enum_pdi,
3956 struct dwarf2_cu *cu)
3958 struct partial_die_info *pdi;
3960 if (enum_pdi->name != NULL)
3961 add_partial_symbol (enum_pdi, cu);
3963 pdi = enum_pdi->die_child;
3966 if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
3967 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
3969 add_partial_symbol (pdi, cu);
3970 pdi = pdi->die_sibling;
3974 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
3975 Return the corresponding abbrev, or NULL if the number is zero (indicating
3976 an empty DIE). In either case *BYTES_READ will be set to the length of
3977 the initial number. */
3979 static struct abbrev_info *
3980 peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
3981 struct dwarf2_cu *cu)
3983 bfd *abfd = cu->objfile->obfd;
3984 unsigned int abbrev_number;
3985 struct abbrev_info *abbrev;
3987 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
3989 if (abbrev_number == 0)
3992 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
3995 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number,
3996 bfd_get_filename (abfd));
4002 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4003 Returns a pointer to the end of a series of DIEs, terminated by an empty
4004 DIE. Any children of the skipped DIEs will also be skipped. */
4007 skip_children (gdb_byte *buffer, gdb_byte *info_ptr, struct dwarf2_cu *cu)
4009 struct abbrev_info *abbrev;
4010 unsigned int bytes_read;
4014 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
4016 return info_ptr + bytes_read;
4018 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
4022 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4023 INFO_PTR should point just after the initial uleb128 of a DIE, and the
4024 abbrev corresponding to that skipped uleb128 should be passed in
4025 ABBREV. Returns a pointer to this DIE's sibling, skipping any
4029 skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
4030 struct abbrev_info *abbrev, struct dwarf2_cu *cu)
4032 unsigned int bytes_read;
4033 struct attribute attr;
4034 bfd *abfd = cu->objfile->obfd;
4035 unsigned int form, i;
4037 for (i = 0; i < abbrev->num_attrs; i++)
4039 /* The only abbrev we care about is DW_AT_sibling. */
4040 if (abbrev->attrs[i].name == DW_AT_sibling)
4042 read_attribute (&attr, &abbrev->attrs[i],
4043 abfd, info_ptr, cu);
4044 if (attr.form == DW_FORM_ref_addr)
4045 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
4047 return buffer + dwarf2_get_ref_die_offset (&attr);
4050 /* If it isn't DW_AT_sibling, skip this attribute. */
4051 form = abbrev->attrs[i].form;
4055 case DW_FORM_ref_addr:
4056 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
4057 and later it is offset sized. */
4058 if (cu->header.version == 2)
4059 info_ptr += cu->header.addr_size;
4061 info_ptr += cu->header.offset_size;
4064 info_ptr += cu->header.addr_size;
4071 case DW_FORM_flag_present:
4086 case DW_FORM_string:
4087 read_direct_string (abfd, info_ptr, &bytes_read);
4088 info_ptr += bytes_read;
4090 case DW_FORM_sec_offset:
4092 info_ptr += cu->header.offset_size;
4094 case DW_FORM_exprloc:
4096 info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
4097 info_ptr += bytes_read;
4099 case DW_FORM_block1:
4100 info_ptr += 1 + read_1_byte (abfd, info_ptr);
4102 case DW_FORM_block2:
4103 info_ptr += 2 + read_2_bytes (abfd, info_ptr);
4105 case DW_FORM_block4:
4106 info_ptr += 4 + read_4_bytes (abfd, info_ptr);
4110 case DW_FORM_ref_udata:
4111 info_ptr = skip_leb128 (abfd, info_ptr);
4113 case DW_FORM_indirect:
4114 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
4115 info_ptr += bytes_read;
4116 /* We need to continue parsing from here, so just go back to
4118 goto skip_attribute;
4121 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
4122 dwarf_form_name (form),
4123 bfd_get_filename (abfd));
4127 if (abbrev->has_children)
4128 return skip_children (buffer, info_ptr, cu);
4133 /* Locate ORIG_PDI's sibling.
4134 INFO_PTR should point to the start of the next DIE after ORIG_PDI
4138 locate_pdi_sibling (struct partial_die_info *orig_pdi,
4139 gdb_byte *buffer, gdb_byte *info_ptr,
4140 bfd *abfd, struct dwarf2_cu *cu)
4142 /* Do we know the sibling already? */
4144 if (orig_pdi->sibling)
4145 return orig_pdi->sibling;
4147 /* Are there any children to deal with? */
4149 if (!orig_pdi->has_children)
4152 /* Skip the children the long way. */
4154 return skip_children (buffer, info_ptr, cu);
4157 /* Expand this partial symbol table into a full symbol table. */
4160 dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
4166 warning (_("bug: psymtab for %s is already read in."), pst->filename);
4172 printf_filtered (_("Reading in symbols for %s..."), pst->filename);
4173 gdb_flush (gdb_stdout);
4176 /* Restore our global data. */
4177 dwarf2_per_objfile = objfile_data (pst->objfile,
4178 dwarf2_objfile_data_key);
4180 /* If this psymtab is constructed from a debug-only objfile, the
4181 has_section_at_zero flag will not necessarily be correct. We
4182 can get the correct value for this flag by looking at the data
4183 associated with the (presumably stripped) associated objfile. */
4184 if (pst->objfile->separate_debug_objfile_backlink)
4186 struct dwarf2_per_objfile *dpo_backlink
4187 = objfile_data (pst->objfile->separate_debug_objfile_backlink,
4188 dwarf2_objfile_data_key);
4190 dwarf2_per_objfile->has_section_at_zero
4191 = dpo_backlink->has_section_at_zero;
4194 dwarf2_per_objfile->reading_partial_symbols = 0;
4196 psymtab_to_symtab_1 (pst);
4198 /* Finish up the debug error message. */
4200 printf_filtered (_("done.\n"));
4205 /* Add PER_CU to the queue. */
4208 queue_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
4210 struct dwarf2_queue_item *item;
4213 item = xmalloc (sizeof (*item));
4214 item->per_cu = per_cu;
4217 if (dwarf2_queue == NULL)
4218 dwarf2_queue = item;
4220 dwarf2_queue_tail->next = item;
4222 dwarf2_queue_tail = item;
4225 /* Process the queue. */
4228 process_queue (struct objfile *objfile)
4230 struct dwarf2_queue_item *item, *next_item;
4232 /* The queue starts out with one item, but following a DIE reference
4233 may load a new CU, adding it to the end of the queue. */
4234 for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
4236 if (dwarf2_per_objfile->using_index
4237 ? !item->per_cu->v.quick->symtab
4238 : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin))
4239 process_full_comp_unit (item->per_cu);
4241 item->per_cu->queued = 0;
4242 next_item = item->next;
4246 dwarf2_queue_tail = NULL;
4249 /* Free all allocated queue entries. This function only releases anything if
4250 an error was thrown; if the queue was processed then it would have been
4251 freed as we went along. */
4254 dwarf2_release_queue (void *dummy)
4256 struct dwarf2_queue_item *item, *last;
4258 item = dwarf2_queue;
4261 /* Anything still marked queued is likely to be in an
4262 inconsistent state, so discard it. */
4263 if (item->per_cu->queued)
4265 if (item->per_cu->cu != NULL)
4266 free_one_cached_comp_unit (item->per_cu->cu);
4267 item->per_cu->queued = 0;
4275 dwarf2_queue = dwarf2_queue_tail = NULL;
4278 /* Read in full symbols for PST, and anything it depends on. */
4281 psymtab_to_symtab_1 (struct partial_symtab *pst)
4283 struct dwarf2_per_cu_data *per_cu;
4284 struct cleanup *back_to;
4287 for (i = 0; i < pst->number_of_dependencies; i++)
4288 if (!pst->dependencies[i]->readin)
4290 /* Inform about additional files that need to be read in. */
4293 /* FIXME: i18n: Need to make this a single string. */
4294 fputs_filtered (" ", gdb_stdout);
4296 fputs_filtered ("and ", gdb_stdout);
4298 printf_filtered ("%s...", pst->dependencies[i]->filename);
4299 wrap_here (""); /* Flush output */
4300 gdb_flush (gdb_stdout);
4302 psymtab_to_symtab_1 (pst->dependencies[i]);
4305 per_cu = pst->read_symtab_private;
4309 /* It's an include file, no symbols to read for it.
4310 Everything is in the parent symtab. */
4315 dw2_do_instantiate_symtab (pst->objfile, per_cu);
4318 /* Load the DIEs associated with PER_CU into memory. */
4321 load_full_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
4323 bfd *abfd = objfile->obfd;
4324 struct dwarf2_cu *cu;
4325 unsigned int offset;
4326 gdb_byte *info_ptr, *beg_of_comp_unit;
4327 struct cleanup *free_abbrevs_cleanup = NULL, *free_cu_cleanup = NULL;
4328 struct attribute *attr;
4331 gdb_assert (! per_cu->from_debug_types);
4333 /* Set local variables from the partial symbol table info. */
4334 offset = per_cu->offset;
4336 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
4337 info_ptr = dwarf2_per_objfile->info.buffer + offset;
4338 beg_of_comp_unit = info_ptr;
4340 if (per_cu->cu == NULL)
4342 cu = alloc_one_comp_unit (objfile);
4346 /* If an error occurs while loading, release our storage. */
4347 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
4349 /* Read in the comp_unit header. */
4350 info_ptr = read_comp_unit_head (&cu->header, info_ptr, abfd);
4352 /* Complete the cu_header. */
4353 cu->header.offset = offset;
4354 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
4356 /* Read the abbrevs for this compilation unit. */
4357 dwarf2_read_abbrevs (abfd, cu);
4358 free_abbrevs_cleanup = make_cleanup (dwarf2_free_abbrev_table, cu);
4360 /* Link this compilation unit into the compilation unit tree. */
4362 cu->per_cu = per_cu;
4364 /* Link this CU into read_in_chain. */
4365 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
4366 dwarf2_per_objfile->read_in_chain = per_cu;
4371 info_ptr += cu->header.first_die_offset;
4374 cu->dies = read_comp_unit (info_ptr, cu);
4376 /* We try not to read any attributes in this function, because not
4377 all objfiles needed for references have been loaded yet, and symbol
4378 table processing isn't initialized. But we have to set the CU language,
4379 or we won't be able to build types correctly. */
4380 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
4382 set_cu_language (DW_UNSND (attr), cu);
4384 set_cu_language (language_minimal, cu);
4386 /* Similarly, if we do not read the producer, we can not apply
4387 producer-specific interpretation. */
4388 attr = dwarf2_attr (cu->dies, DW_AT_producer, cu);
4390 cu->producer = DW_STRING (attr);
4394 do_cleanups (free_abbrevs_cleanup);
4396 /* We've successfully allocated this compilation unit. Let our
4397 caller clean it up when finished with it. */
4398 discard_cleanups (free_cu_cleanup);
4402 /* Add a DIE to the delayed physname list. */
4405 add_to_method_list (struct type *type, int fnfield_index, int index,
4406 const char *name, struct die_info *die,
4407 struct dwarf2_cu *cu)
4409 struct delayed_method_info mi;
4411 mi.fnfield_index = fnfield_index;
4415 VEC_safe_push (delayed_method_info, cu->method_list, &mi);
4418 /* A cleanup for freeing the delayed method list. */
4421 free_delayed_list (void *ptr)
4423 struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr;
4424 if (cu->method_list != NULL)
4426 VEC_free (delayed_method_info, cu->method_list);
4427 cu->method_list = NULL;
4431 /* Compute the physnames of any methods on the CU's method list.
4433 The computation of method physnames is delayed in order to avoid the
4434 (bad) condition that one of the method's formal parameters is of an as yet
4438 compute_delayed_physnames (struct dwarf2_cu *cu)
4441 struct delayed_method_info *mi;
4442 for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i)
4445 struct fn_fieldlist *fn_flp
4446 = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index);
4447 physname = (char *) dwarf2_physname ((char *) mi->name, mi->die, cu);
4448 fn_flp->fn_fields[mi->index].physname = physname ? physname : "";
4452 /* Generate full symbol information for PST and CU, whose DIEs have
4453 already been loaded into memory. */
4456 process_full_comp_unit (struct dwarf2_per_cu_data *per_cu)
4458 struct dwarf2_cu *cu = per_cu->cu;
4459 struct objfile *objfile = per_cu->objfile;
4460 CORE_ADDR lowpc, highpc;
4461 struct symtab *symtab;
4462 struct cleanup *back_to, *delayed_list_cleanup;
4465 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
4468 back_to = make_cleanup (really_free_pendings, NULL);
4469 delayed_list_cleanup = make_cleanup (free_delayed_list, cu);
4471 cu->list_in_scope = &file_symbols;
4473 dwarf2_find_base_address (cu->dies, cu);
4475 /* Do line number decoding in read_file_scope () */
4476 process_die (cu->dies, cu);
4478 /* Now that we have processed all the DIEs in the CU, all the types
4479 should be complete, and it should now be safe to compute all of the
4481 compute_delayed_physnames (cu);
4482 do_cleanups (delayed_list_cleanup);
4484 /* Some compilers don't define a DW_AT_high_pc attribute for the
4485 compilation unit. If the DW_AT_high_pc is missing, synthesize
4486 it, by scanning the DIE's below the compilation unit. */
4487 get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
4489 symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
4491 /* Set symtab language to language from DW_AT_language.
4492 If the compilation is from a C file generated by language preprocessors,
4493 do not set the language if it was already deduced by start_subfile. */
4495 && !(cu->language == language_c && symtab->language != language_c))
4497 symtab->language = cu->language;
4500 if (dwarf2_per_objfile->using_index)
4501 per_cu->v.quick->symtab = symtab;
4504 struct partial_symtab *pst = per_cu->v.psymtab;
4505 pst->symtab = symtab;
4509 do_cleanups (back_to);
4512 /* Process a die and its children. */
4515 process_die (struct die_info *die, struct dwarf2_cu *cu)
4519 case DW_TAG_padding:
4521 case DW_TAG_compile_unit:
4522 read_file_scope (die, cu);
4524 case DW_TAG_type_unit:
4525 read_type_unit_scope (die, cu);
4527 case DW_TAG_subprogram:
4528 case DW_TAG_inlined_subroutine:
4529 read_func_scope (die, cu);
4531 case DW_TAG_lexical_block:
4532 case DW_TAG_try_block:
4533 case DW_TAG_catch_block:
4534 read_lexical_block_scope (die, cu);
4536 case DW_TAG_class_type:
4537 case DW_TAG_interface_type:
4538 case DW_TAG_structure_type:
4539 case DW_TAG_union_type:
4540 process_structure_scope (die, cu);
4542 case DW_TAG_enumeration_type:
4543 process_enumeration_scope (die, cu);
4546 /* These dies have a type, but processing them does not create
4547 a symbol or recurse to process the children. Therefore we can
4548 read them on-demand through read_type_die. */
4549 case DW_TAG_subroutine_type:
4550 case DW_TAG_set_type:
4551 case DW_TAG_array_type:
4552 case DW_TAG_pointer_type:
4553 case DW_TAG_ptr_to_member_type:
4554 case DW_TAG_reference_type:
4555 case DW_TAG_string_type:
4558 case DW_TAG_base_type:
4559 case DW_TAG_subrange_type:
4560 case DW_TAG_typedef:
4561 /* Add a typedef symbol for the type definition, if it has a
4563 new_symbol (die, read_type_die (die, cu), cu);
4565 case DW_TAG_common_block:
4566 read_common_block (die, cu);
4568 case DW_TAG_common_inclusion:
4570 case DW_TAG_namespace:
4571 processing_has_namespace_info = 1;
4572 read_namespace (die, cu);
4575 processing_has_namespace_info = 1;
4576 read_module (die, cu);
4578 case DW_TAG_imported_declaration:
4579 case DW_TAG_imported_module:
4580 processing_has_namespace_info = 1;
4581 if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
4582 || cu->language != language_fortran))
4583 complaint (&symfile_complaints, _("Tag '%s' has unexpected children"),
4584 dwarf_tag_name (die->tag));
4585 read_import_statement (die, cu);
4588 new_symbol (die, NULL, cu);
4593 /* A helper function for dwarf2_compute_name which determines whether DIE
4594 needs to have the name of the scope prepended to the name listed in the
4598 die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu)
4600 struct attribute *attr;
4604 case DW_TAG_namespace:
4605 case DW_TAG_typedef:
4606 case DW_TAG_class_type:
4607 case DW_TAG_interface_type:
4608 case DW_TAG_structure_type:
4609 case DW_TAG_union_type:
4610 case DW_TAG_enumeration_type:
4611 case DW_TAG_enumerator:
4612 case DW_TAG_subprogram:
4616 case DW_TAG_variable:
4617 /* We only need to prefix "globally" visible variables. These include
4618 any variable marked with DW_AT_external or any variable that
4619 lives in a namespace. [Variables in anonymous namespaces
4620 require prefixing, but they are not DW_AT_external.] */
4622 if (dwarf2_attr (die, DW_AT_specification, cu))
4624 struct dwarf2_cu *spec_cu = cu;
4626 return die_needs_namespace (die_specification (die, &spec_cu),
4630 attr = dwarf2_attr (die, DW_AT_external, cu);
4631 if (attr == NULL && die->parent->tag != DW_TAG_namespace
4632 && die->parent->tag != DW_TAG_module)
4634 /* A variable in a lexical block of some kind does not need a
4635 namespace, even though in C++ such variables may be external
4636 and have a mangled name. */
4637 if (die->parent->tag == DW_TAG_lexical_block
4638 || die->parent->tag == DW_TAG_try_block
4639 || die->parent->tag == DW_TAG_catch_block
4640 || die->parent->tag == DW_TAG_subprogram)
4649 /* Retrieve the last character from a mem_file. */
4652 do_ui_file_peek_last (void *object, const char *buffer, long length)
4654 char *last_char_p = (char *) object;
4657 *last_char_p = buffer[length - 1];
4660 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
4661 compute the physname for the object, which include a method's
4662 formal parameters (C++/Java) and return type (Java).
4664 For Ada, return the DIE's linkage name rather than the fully qualified
4665 name. PHYSNAME is ignored..
4667 The result is allocated on the objfile_obstack and canonicalized. */
4670 dwarf2_compute_name (char *name, struct die_info *die, struct dwarf2_cu *cu,
4674 name = dwarf2_name (die, cu);
4676 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
4677 compute it by typename_concat inside GDB. */
4678 if (cu->language == language_ada
4679 || (cu->language == language_fortran && physname))
4681 /* For Ada unit, we prefer the linkage name over the name, as
4682 the former contains the exported name, which the user expects
4683 to be able to reference. Ideally, we want the user to be able
4684 to reference this entity using either natural or linkage name,
4685 but we haven't started looking at this enhancement yet. */
4686 struct attribute *attr;
4688 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
4690 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
4691 if (attr && DW_STRING (attr))
4692 return DW_STRING (attr);
4695 /* These are the only languages we know how to qualify names in. */
4697 && (cu->language == language_cplus || cu->language == language_java
4698 || cu->language == language_fortran))
4700 if (die_needs_namespace (die, cu))
4704 struct ui_file *buf;
4706 prefix = determine_prefix (die, cu);
4707 buf = mem_fileopen ();
4708 if (*prefix != '\0')
4710 char *prefixed_name = typename_concat (NULL, prefix, name,
4713 fputs_unfiltered (prefixed_name, buf);
4714 xfree (prefixed_name);
4717 fputs_unfiltered (name ? name : "", buf);
4719 /* Template parameters may be specified in the DIE's DW_AT_name, or
4720 as children with DW_TAG_template_type_param or
4721 DW_TAG_value_type_param. If the latter, add them to the name
4722 here. If the name already has template parameters, then
4723 skip this step; some versions of GCC emit both, and
4724 it is more efficient to use the pre-computed name.
4726 Something to keep in mind about this process: it is very
4727 unlikely, or in some cases downright impossible, to produce
4728 something that will match the mangled name of a function.
4729 If the definition of the function has the same debug info,
4730 we should be able to match up with it anyway. But fallbacks
4731 using the minimal symbol, for instance to find a method
4732 implemented in a stripped copy of libstdc++, will not work.
4733 If we do not have debug info for the definition, we will have to
4734 match them up some other way.
4736 When we do name matching there is a related problem with function
4737 templates; two instantiated function templates are allowed to
4738 differ only by their return types, which we do not add here. */
4740 if (cu->language == language_cplus && strchr (name, '<') == NULL)
4742 struct attribute *attr;
4743 struct die_info *child;
4746 die->building_fullname = 1;
4748 for (child = die->child; child != NULL; child = child->sibling)
4753 struct dwarf2_locexpr_baton *baton;
4756 if (child->tag != DW_TAG_template_type_param
4757 && child->tag != DW_TAG_template_value_param)
4762 fputs_unfiltered ("<", buf);
4766 fputs_unfiltered (", ", buf);
4768 attr = dwarf2_attr (child, DW_AT_type, cu);
4771 complaint (&symfile_complaints,
4772 _("template parameter missing DW_AT_type"));
4773 fputs_unfiltered ("UNKNOWN_TYPE", buf);
4776 type = die_type (child, cu);
4778 if (child->tag == DW_TAG_template_type_param)
4780 c_print_type (type, "", buf, -1, 0);
4784 attr = dwarf2_attr (child, DW_AT_const_value, cu);
4787 complaint (&symfile_complaints,
4788 _("template parameter missing DW_AT_const_value"));
4789 fputs_unfiltered ("UNKNOWN_VALUE", buf);
4793 dwarf2_const_value_attr (attr, type, name,
4794 &cu->comp_unit_obstack, cu,
4795 &value, &bytes, &baton);
4797 if (TYPE_NOSIGN (type))
4798 /* GDB prints characters as NUMBER 'CHAR'. If that's
4799 changed, this can use value_print instead. */
4800 c_printchar (value, type, buf);
4803 struct value_print_options opts;
4806 v = dwarf2_evaluate_loc_desc (type, NULL,
4810 else if (bytes != NULL)
4812 v = allocate_value (type);
4813 memcpy (value_contents_writeable (v), bytes,
4814 TYPE_LENGTH (type));
4817 v = value_from_longest (type, value);
4819 /* Specify decimal so that we do not depend on the radix. */
4820 get_formatted_print_options (&opts, 'd');
4822 value_print (v, buf, &opts);
4828 die->building_fullname = 0;
4832 /* Close the argument list, with a space if necessary
4833 (nested templates). */
4834 char last_char = '\0';
4835 ui_file_put (buf, do_ui_file_peek_last, &last_char);
4836 if (last_char == '>')
4837 fputs_unfiltered (" >", buf);
4839 fputs_unfiltered (">", buf);
4843 /* For Java and C++ methods, append formal parameter type
4844 information, if PHYSNAME. */
4846 if (physname && die->tag == DW_TAG_subprogram
4847 && (cu->language == language_cplus
4848 || cu->language == language_java))
4850 struct type *type = read_type_die (die, cu);
4852 c_type_print_args (type, buf, 0, cu->language);
4854 if (cu->language == language_java)
4856 /* For java, we must append the return type to method
4858 if (die->tag == DW_TAG_subprogram)
4859 java_print_type (TYPE_TARGET_TYPE (type), "", buf,
4862 else if (cu->language == language_cplus)
4864 /* Assume that an artificial first parameter is
4865 "this", but do not crash if it is not. RealView
4866 marks unnamed (and thus unused) parameters as
4867 artificial; there is no way to differentiate
4869 if (TYPE_NFIELDS (type) > 0
4870 && TYPE_FIELD_ARTIFICIAL (type, 0)
4871 && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR
4872 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 0))))
4873 fputs_unfiltered (" const", buf);
4877 name = ui_file_obsavestring (buf, &cu->objfile->objfile_obstack,
4879 ui_file_delete (buf);
4881 if (cu->language == language_cplus)
4884 = dwarf2_canonicalize_name (name, cu,
4885 &cu->objfile->objfile_obstack);
4896 /* Return the fully qualified name of DIE, based on its DW_AT_name.
4897 If scope qualifiers are appropriate they will be added. The result
4898 will be allocated on the objfile_obstack, or NULL if the DIE does
4899 not have a name. NAME may either be from a previous call to
4900 dwarf2_name or NULL.
4902 The output string will be canonicalized (if C++/Java). */
4905 dwarf2_full_name (char *name, struct die_info *die, struct dwarf2_cu *cu)
4907 return dwarf2_compute_name (name, die, cu, 0);
4910 /* Construct a physname for the given DIE in CU. NAME may either be
4911 from a previous call to dwarf2_name or NULL. The result will be
4912 allocated on the objfile_objstack or NULL if the DIE does not have a
4915 The output string will be canonicalized (if C++/Java). */
4918 dwarf2_physname (char *name, struct die_info *die, struct dwarf2_cu *cu)
4920 return dwarf2_compute_name (name, die, cu, 1);
4923 /* Read the import statement specified by the given die and record it. */
4926 read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
4928 struct attribute *import_attr;
4929 struct die_info *imported_die;
4930 struct dwarf2_cu *imported_cu;
4931 const char *imported_name;
4932 const char *imported_name_prefix;
4933 const char *canonical_name;
4934 const char *import_alias;
4935 const char *imported_declaration = NULL;
4936 const char *import_prefix;
4940 import_attr = dwarf2_attr (die, DW_AT_import, cu);
4941 if (import_attr == NULL)
4943 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
4944 dwarf_tag_name (die->tag));
4949 imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu);
4950 imported_name = dwarf2_name (imported_die, imported_cu);
4951 if (imported_name == NULL)
4953 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
4955 The import in the following code:
4969 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
4970 <52> DW_AT_decl_file : 1
4971 <53> DW_AT_decl_line : 6
4972 <54> DW_AT_import : <0x75>
4973 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
4975 <5b> DW_AT_decl_file : 1
4976 <5c> DW_AT_decl_line : 2
4977 <5d> DW_AT_type : <0x6e>
4979 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
4980 <76> DW_AT_byte_size : 4
4981 <77> DW_AT_encoding : 5 (signed)
4983 imports the wrong die ( 0x75 instead of 0x58 ).
4984 This case will be ignored until the gcc bug is fixed. */
4988 /* Figure out the local name after import. */
4989 import_alias = dwarf2_name (die, cu);
4991 /* Figure out where the statement is being imported to. */
4992 import_prefix = determine_prefix (die, cu);
4994 /* Figure out what the scope of the imported die is and prepend it
4995 to the name of the imported die. */
4996 imported_name_prefix = determine_prefix (imported_die, imported_cu);
4998 if (imported_die->tag != DW_TAG_namespace
4999 && imported_die->tag != DW_TAG_module)
5001 imported_declaration = imported_name;
5002 canonical_name = imported_name_prefix;
5004 else if (strlen (imported_name_prefix) > 0)
5006 temp = alloca (strlen (imported_name_prefix)
5007 + 2 + strlen (imported_name) + 1);
5008 strcpy (temp, imported_name_prefix);
5009 strcat (temp, "::");
5010 strcat (temp, imported_name);
5011 canonical_name = temp;
5014 canonical_name = imported_name;
5016 cp_add_using_directive (import_prefix,
5019 imported_declaration,
5020 &cu->objfile->objfile_obstack);
5024 initialize_cu_func_list (struct dwarf2_cu *cu)
5026 cu->first_fn = cu->last_fn = cu->cached_fn = NULL;
5030 free_cu_line_header (void *arg)
5032 struct dwarf2_cu *cu = arg;
5034 free_line_header (cu->line_header);
5035 cu->line_header = NULL;
5039 find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu,
5040 char **name, char **comp_dir)
5042 struct attribute *attr;
5047 /* Find the filename. Do not use dwarf2_name here, since the filename
5048 is not a source language identifier. */
5049 attr = dwarf2_attr (die, DW_AT_name, cu);
5052 *name = DW_STRING (attr);
5055 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
5057 *comp_dir = DW_STRING (attr);
5058 else if (*name != NULL && IS_ABSOLUTE_PATH (*name))
5060 *comp_dir = ldirname (*name);
5061 if (*comp_dir != NULL)
5062 make_cleanup (xfree, *comp_dir);
5064 if (*comp_dir != NULL)
5066 /* Irix 6.2 native cc prepends <machine>.: to the compilation
5067 directory, get rid of it. */
5068 char *cp = strchr (*comp_dir, ':');
5070 if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/')
5075 *name = "<unknown>";
5079 read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
5081 struct objfile *objfile = cu->objfile;
5082 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
5083 CORE_ADDR lowpc = ((CORE_ADDR) -1);
5084 CORE_ADDR highpc = ((CORE_ADDR) 0);
5085 struct attribute *attr;
5087 char *comp_dir = NULL;
5088 struct die_info *child_die;
5089 bfd *abfd = objfile->obfd;
5090 struct line_header *line_header = 0;
5093 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5095 get_scope_pc_bounds (die, &lowpc, &highpc, cu);
5097 /* If we didn't find a lowpc, set it to highpc to avoid complaints
5098 from finish_block. */
5099 if (lowpc == ((CORE_ADDR) -1))
5104 find_file_and_directory (die, cu, &name, &comp_dir);
5106 attr = dwarf2_attr (die, DW_AT_language, cu);
5109 set_cu_language (DW_UNSND (attr), cu);
5112 attr = dwarf2_attr (die, DW_AT_producer, cu);
5114 cu->producer = DW_STRING (attr);
5116 /* We assume that we're processing GCC output. */
5117 processing_gcc_compilation = 2;
5119 processing_has_namespace_info = 0;
5121 start_symtab (name, comp_dir, lowpc);
5122 record_debugformat ("DWARF 2");
5123 record_producer (cu->producer);
5125 initialize_cu_func_list (cu);
5127 /* Decode line number information if present. We do this before
5128 processing child DIEs, so that the line header table is available
5129 for DW_AT_decl_file. */
5130 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
5133 unsigned int line_offset = DW_UNSND (attr);
5134 line_header = dwarf_decode_line_header (line_offset, abfd, cu);
5137 cu->line_header = line_header;
5138 make_cleanup (free_cu_line_header, cu);
5139 dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL);
5143 /* Process all dies in compilation unit. */
5144 if (die->child != NULL)
5146 child_die = die->child;
5147 while (child_die && child_die->tag)
5149 process_die (child_die, cu);
5150 child_die = sibling_die (child_die);
5154 /* Decode macro information, if present. Dwarf 2 macro information
5155 refers to information in the line number info statement program
5156 header, so we can only read it if we've read the header
5158 attr = dwarf2_attr (die, DW_AT_macro_info, cu);
5159 if (attr && line_header)
5161 unsigned int macro_offset = DW_UNSND (attr);
5163 dwarf_decode_macros (line_header, macro_offset,
5164 comp_dir, abfd, cu);
5166 do_cleanups (back_to);
5169 /* For TUs we want to skip the first top level sibling if it's not the
5170 actual type being defined by this TU. In this case the first top
5171 level sibling is there to provide context only. */
5174 read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
5176 struct objfile *objfile = cu->objfile;
5177 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
5179 struct attribute *attr;
5181 char *comp_dir = NULL;
5182 struct die_info *child_die;
5183 bfd *abfd = objfile->obfd;
5185 /* start_symtab needs a low pc, but we don't really have one.
5186 Do what read_file_scope would do in the absence of such info. */
5187 lowpc = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5189 /* Find the filename. Do not use dwarf2_name here, since the filename
5190 is not a source language identifier. */
5191 attr = dwarf2_attr (die, DW_AT_name, cu);
5193 name = DW_STRING (attr);
5195 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
5197 comp_dir = DW_STRING (attr);
5198 else if (name != NULL && IS_ABSOLUTE_PATH (name))
5200 comp_dir = ldirname (name);
5201 if (comp_dir != NULL)
5202 make_cleanup (xfree, comp_dir);
5208 attr = dwarf2_attr (die, DW_AT_language, cu);
5210 set_cu_language (DW_UNSND (attr), cu);
5212 /* This isn't technically needed today. It is done for symmetry
5213 with read_file_scope. */
5214 attr = dwarf2_attr (die, DW_AT_producer, cu);
5216 cu->producer = DW_STRING (attr);
5218 /* We assume that we're processing GCC output. */
5219 processing_gcc_compilation = 2;
5221 processing_has_namespace_info = 0;
5223 start_symtab (name, comp_dir, lowpc);
5224 record_debugformat ("DWARF 2");
5225 record_producer (cu->producer);
5227 /* Process the dies in the type unit. */
5228 if (die->child == NULL)
5230 dump_die_for_error (die);
5231 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
5232 bfd_get_filename (abfd));
5235 child_die = die->child;
5237 while (child_die && child_die->tag)
5239 process_die (child_die, cu);
5241 child_die = sibling_die (child_die);
5244 do_cleanups (back_to);
5248 add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc,
5249 struct dwarf2_cu *cu)
5251 struct function_range *thisfn;
5253 thisfn = (struct function_range *)
5254 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range));
5255 thisfn->name = name;
5256 thisfn->lowpc = lowpc;
5257 thisfn->highpc = highpc;
5258 thisfn->seen_line = 0;
5259 thisfn->next = NULL;
5261 if (cu->last_fn == NULL)
5262 cu->first_fn = thisfn;
5264 cu->last_fn->next = thisfn;
5266 cu->last_fn = thisfn;
5269 /* qsort helper for inherit_abstract_dies. */
5272 unsigned_int_compar (const void *ap, const void *bp)
5274 unsigned int a = *(unsigned int *) ap;
5275 unsigned int b = *(unsigned int *) bp;
5277 return (a > b) - (b > a);
5280 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
5281 Inherit only the children of the DW_AT_abstract_origin DIE not being already
5282 referenced by DW_AT_abstract_origin from the children of the current DIE. */
5285 inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
5287 struct die_info *child_die;
5288 unsigned die_children_count;
5289 /* CU offsets which were referenced by children of the current DIE. */
5291 unsigned *offsets_end, *offsetp;
5292 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
5293 struct die_info *origin_die;
5294 /* Iterator of the ORIGIN_DIE children. */
5295 struct die_info *origin_child_die;
5296 struct cleanup *cleanups;
5297 struct attribute *attr;
5298 struct dwarf2_cu *origin_cu;
5299 struct pending **origin_previous_list_in_scope;
5301 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
5305 /* Note that following die references may follow to a die in a
5309 origin_die = follow_die_ref (die, attr, &origin_cu);
5311 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
5313 origin_previous_list_in_scope = origin_cu->list_in_scope;
5314 origin_cu->list_in_scope = cu->list_in_scope;
5316 if (die->tag != origin_die->tag
5317 && !(die->tag == DW_TAG_inlined_subroutine
5318 && origin_die->tag == DW_TAG_subprogram))
5319 complaint (&symfile_complaints,
5320 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
5321 die->offset, origin_die->offset);
5323 child_die = die->child;
5324 die_children_count = 0;
5325 while (child_die && child_die->tag)
5327 child_die = sibling_die (child_die);
5328 die_children_count++;
5330 offsets = xmalloc (sizeof (*offsets) * die_children_count);
5331 cleanups = make_cleanup (xfree, offsets);
5333 offsets_end = offsets;
5334 child_die = die->child;
5335 while (child_die && child_die->tag)
5337 /* For each CHILD_DIE, find the corresponding child of
5338 ORIGIN_DIE. If there is more than one layer of
5339 DW_AT_abstract_origin, follow them all; there shouldn't be,
5340 but GCC versions at least through 4.4 generate this (GCC PR
5342 struct die_info *child_origin_die = child_die;
5343 struct dwarf2_cu *child_origin_cu = cu;
5347 attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin,
5351 child_origin_die = follow_die_ref (child_origin_die, attr,
5355 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
5356 counterpart may exist. */
5357 if (child_origin_die != child_die)
5359 if (child_die->tag != child_origin_die->tag
5360 && !(child_die->tag == DW_TAG_inlined_subroutine
5361 && child_origin_die->tag == DW_TAG_subprogram))
5362 complaint (&symfile_complaints,
5363 _("Child DIE 0x%x and its abstract origin 0x%x have "
5364 "different tags"), child_die->offset,
5365 child_origin_die->offset);
5366 if (child_origin_die->parent != origin_die)
5367 complaint (&symfile_complaints,
5368 _("Child DIE 0x%x and its abstract origin 0x%x have "
5369 "different parents"), child_die->offset,
5370 child_origin_die->offset);
5372 *offsets_end++ = child_origin_die->offset;
5374 child_die = sibling_die (child_die);
5376 qsort (offsets, offsets_end - offsets, sizeof (*offsets),
5377 unsigned_int_compar);
5378 for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++)
5379 if (offsetp[-1] == *offsetp)
5380 complaint (&symfile_complaints, _("Multiple children of DIE 0x%x refer "
5381 "to DIE 0x%x as their abstract origin"),
5382 die->offset, *offsetp);
5385 origin_child_die = origin_die->child;
5386 while (origin_child_die && origin_child_die->tag)
5388 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
5389 while (offsetp < offsets_end && *offsetp < origin_child_die->offset)
5391 if (offsetp >= offsets_end || *offsetp > origin_child_die->offset)
5393 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
5394 process_die (origin_child_die, origin_cu);
5396 origin_child_die = sibling_die (origin_child_die);
5398 origin_cu->list_in_scope = origin_previous_list_in_scope;
5400 do_cleanups (cleanups);
5404 read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
5406 struct objfile *objfile = cu->objfile;
5407 struct context_stack *new;
5410 struct die_info *child_die;
5411 struct attribute *attr, *call_line, *call_file;
5414 struct block *block;
5415 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
5416 VEC (symbolp) *template_args = NULL;
5417 struct template_symbol *templ_func = NULL;
5421 /* If we do not have call site information, we can't show the
5422 caller of this inlined function. That's too confusing, so
5423 only use the scope for local variables. */
5424 call_line = dwarf2_attr (die, DW_AT_call_line, cu);
5425 call_file = dwarf2_attr (die, DW_AT_call_file, cu);
5426 if (call_line == NULL || call_file == NULL)
5428 read_lexical_block_scope (die, cu);
5433 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5435 name = dwarf2_name (die, cu);
5437 /* Ignore functions with missing or empty names. These are actually
5438 illegal according to the DWARF standard. */
5441 complaint (&symfile_complaints,
5442 _("missing name for subprogram DIE at %d"), die->offset);
5446 /* Ignore functions with missing or invalid low and high pc attributes. */
5447 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
5449 attr = dwarf2_attr (die, DW_AT_external, cu);
5450 if (!attr || !DW_UNSND (attr))
5451 complaint (&symfile_complaints,
5452 _("cannot get low and high bounds for subprogram DIE at %d"),
5460 /* Record the function range for dwarf_decode_lines. */
5461 add_to_cu_func_list (name, lowpc, highpc, cu);
5463 /* If we have any template arguments, then we must allocate a
5464 different sort of symbol. */
5465 for (child_die = die->child; child_die; child_die = sibling_die (child_die))
5467 if (child_die->tag == DW_TAG_template_type_param
5468 || child_die->tag == DW_TAG_template_value_param)
5470 templ_func = OBSTACK_ZALLOC (&objfile->objfile_obstack,
5471 struct template_symbol);
5472 templ_func->base.is_cplus_template_function = 1;
5477 new = push_context (0, lowpc);
5478 new->name = new_symbol_full (die, read_type_die (die, cu), cu,
5479 (struct symbol *) templ_func);
5481 /* If there is a location expression for DW_AT_frame_base, record
5483 attr = dwarf2_attr (die, DW_AT_frame_base, cu);
5485 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
5486 expression is being recorded directly in the function's symbol
5487 and not in a separate frame-base object. I guess this hack is
5488 to avoid adding some sort of frame-base adjunct/annex to the
5489 function's symbol :-(. The problem with doing this is that it
5490 results in a function symbol with a location expression that
5491 has nothing to do with the location of the function, ouch! The
5492 relationship should be: a function's symbol has-a frame base; a
5493 frame-base has-a location expression. */
5494 dwarf2_symbol_mark_computed (attr, new->name, cu);
5496 cu->list_in_scope = &local_symbols;
5498 if (die->child != NULL)
5500 child_die = die->child;
5501 while (child_die && child_die->tag)
5503 if (child_die->tag == DW_TAG_template_type_param
5504 || child_die->tag == DW_TAG_template_value_param)
5506 struct symbol *arg = new_symbol (child_die, NULL, cu);
5509 VEC_safe_push (symbolp, template_args, arg);
5512 process_die (child_die, cu);
5513 child_die = sibling_die (child_die);
5517 inherit_abstract_dies (die, cu);
5519 /* If we have a DW_AT_specification, we might need to import using
5520 directives from the context of the specification DIE. See the
5521 comment in determine_prefix. */
5522 if (cu->language == language_cplus
5523 && dwarf2_attr (die, DW_AT_specification, cu))
5525 struct dwarf2_cu *spec_cu = cu;
5526 struct die_info *spec_die = die_specification (die, &spec_cu);
5530 child_die = spec_die->child;
5531 while (child_die && child_die->tag)
5533 if (child_die->tag == DW_TAG_imported_module)
5534 process_die (child_die, spec_cu);
5535 child_die = sibling_die (child_die);
5538 /* In some cases, GCC generates specification DIEs that
5539 themselves contain DW_AT_specification attributes. */
5540 spec_die = die_specification (spec_die, &spec_cu);
5544 new = pop_context ();
5545 /* Make a block for the local symbols within. */
5546 block = finish_block (new->name, &local_symbols, new->old_blocks,
5547 lowpc, highpc, objfile);
5549 /* For C++, set the block's scope. */
5550 if (cu->language == language_cplus || cu->language == language_fortran)
5551 cp_set_block_scope (new->name, block, &objfile->objfile_obstack,
5552 determine_prefix (die, cu),
5553 processing_has_namespace_info);
5555 /* If we have address ranges, record them. */
5556 dwarf2_record_block_ranges (die, block, baseaddr, cu);
5558 /* Attach template arguments to function. */
5559 if (! VEC_empty (symbolp, template_args))
5561 gdb_assert (templ_func != NULL);
5563 templ_func->n_template_arguments = VEC_length (symbolp, template_args);
5564 templ_func->template_arguments
5565 = obstack_alloc (&objfile->objfile_obstack,
5566 (templ_func->n_template_arguments
5567 * sizeof (struct symbol *)));
5568 memcpy (templ_func->template_arguments,
5569 VEC_address (symbolp, template_args),
5570 (templ_func->n_template_arguments * sizeof (struct symbol *)));
5571 VEC_free (symbolp, template_args);
5574 /* In C++, we can have functions nested inside functions (e.g., when
5575 a function declares a class that has methods). This means that
5576 when we finish processing a function scope, we may need to go
5577 back to building a containing block's symbol lists. */
5578 local_symbols = new->locals;
5579 param_symbols = new->params;
5580 using_directives = new->using_directives;
5582 /* If we've finished processing a top-level function, subsequent
5583 symbols go in the file symbol list. */
5584 if (outermost_context_p ())
5585 cu->list_in_scope = &file_symbols;
5588 /* Process all the DIES contained within a lexical block scope. Start
5589 a new scope, process the dies, and then close the scope. */
5592 read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
5594 struct objfile *objfile = cu->objfile;
5595 struct context_stack *new;
5596 CORE_ADDR lowpc, highpc;
5597 struct die_info *child_die;
5600 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5602 /* Ignore blocks with missing or invalid low and high pc attributes. */
5603 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
5604 as multiple lexical blocks? Handling children in a sane way would
5605 be nasty. Might be easier to properly extend generic blocks to
5607 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
5612 push_context (0, lowpc);
5613 if (die->child != NULL)
5615 child_die = die->child;
5616 while (child_die && child_die->tag)
5618 process_die (child_die, cu);
5619 child_die = sibling_die (child_die);
5622 new = pop_context ();
5624 if (local_symbols != NULL || using_directives != NULL)
5627 = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
5630 /* Note that recording ranges after traversing children, as we
5631 do here, means that recording a parent's ranges entails
5632 walking across all its children's ranges as they appear in
5633 the address map, which is quadratic behavior.
5635 It would be nicer to record the parent's ranges before
5636 traversing its children, simply overriding whatever you find
5637 there. But since we don't even decide whether to create a
5638 block until after we've traversed its children, that's hard
5640 dwarf2_record_block_ranges (die, block, baseaddr, cu);
5642 local_symbols = new->locals;
5643 using_directives = new->using_directives;
5646 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
5647 Return 1 if the attributes are present and valid, otherwise, return 0.
5648 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
5651 dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
5652 CORE_ADDR *high_return, struct dwarf2_cu *cu,
5653 struct partial_symtab *ranges_pst)
5655 struct objfile *objfile = cu->objfile;
5656 struct comp_unit_head *cu_header = &cu->header;
5657 bfd *obfd = objfile->obfd;
5658 unsigned int addr_size = cu_header->addr_size;
5659 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
5660 /* Base address selection entry. */
5671 found_base = cu->base_known;
5672 base = cu->base_address;
5674 dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
5675 if (offset >= dwarf2_per_objfile->ranges.size)
5677 complaint (&symfile_complaints,
5678 _("Offset %d out of bounds for DW_AT_ranges attribute"),
5682 buffer = dwarf2_per_objfile->ranges.buffer + offset;
5684 /* Read in the largest possible address. */
5685 marker = read_address (obfd, buffer, cu, &dummy);
5686 if ((marker & mask) == mask)
5688 /* If we found the largest possible address, then
5689 read the base address. */
5690 base = read_address (obfd, buffer + addr_size, cu, &dummy);
5691 buffer += 2 * addr_size;
5692 offset += 2 * addr_size;
5698 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5702 CORE_ADDR range_beginning, range_end;
5704 range_beginning = read_address (obfd, buffer, cu, &dummy);
5705 buffer += addr_size;
5706 range_end = read_address (obfd, buffer, cu, &dummy);
5707 buffer += addr_size;
5708 offset += 2 * addr_size;
5710 /* An end of list marker is a pair of zero addresses. */
5711 if (range_beginning == 0 && range_end == 0)
5712 /* Found the end of list entry. */
5715 /* Each base address selection entry is a pair of 2 values.
5716 The first is the largest possible address, the second is
5717 the base address. Check for a base address here. */
5718 if ((range_beginning & mask) == mask)
5720 /* If we found the largest possible address, then
5721 read the base address. */
5722 base = read_address (obfd, buffer + addr_size, cu, &dummy);
5729 /* We have no valid base address for the ranges
5731 complaint (&symfile_complaints,
5732 _("Invalid .debug_ranges data (no base address)"));
5736 range_beginning += base;
5739 if (ranges_pst != NULL && range_beginning < range_end)
5740 addrmap_set_empty (objfile->psymtabs_addrmap,
5741 range_beginning + baseaddr, range_end - 1 + baseaddr,
5744 /* FIXME: This is recording everything as a low-high
5745 segment of consecutive addresses. We should have a
5746 data structure for discontiguous block ranges
5750 low = range_beginning;
5756 if (range_beginning < low)
5757 low = range_beginning;
5758 if (range_end > high)
5764 /* If the first entry is an end-of-list marker, the range
5765 describes an empty scope, i.e. no instructions. */
5771 *high_return = high;
5775 /* Get low and high pc attributes from a die. Return 1 if the attributes
5776 are present and valid, otherwise, return 0. Return -1 if the range is
5777 discontinuous, i.e. derived from DW_AT_ranges information. */
5779 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
5780 CORE_ADDR *highpc, struct dwarf2_cu *cu,
5781 struct partial_symtab *pst)
5783 struct attribute *attr;
5788 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
5791 high = DW_ADDR (attr);
5792 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
5794 low = DW_ADDR (attr);
5796 /* Found high w/o low attribute. */
5799 /* Found consecutive range of addresses. */
5804 attr = dwarf2_attr (die, DW_AT_ranges, cu);
5807 /* Value of the DW_AT_ranges attribute is the offset in the
5808 .debug_ranges section. */
5809 if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu, pst))
5811 /* Found discontinuous range of addresses. */
5819 /* When using the GNU linker, .gnu.linkonce. sections are used to
5820 eliminate duplicate copies of functions and vtables and such.
5821 The linker will arbitrarily choose one and discard the others.
5822 The AT_*_pc values for such functions refer to local labels in
5823 these sections. If the section from that file was discarded, the
5824 labels are not in the output, so the relocs get a value of 0.
5825 If this is a discarded function, mark the pc bounds as invalid,
5826 so that GDB will ignore it. */
5827 if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
5835 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
5836 its low and high PC addresses. Do nothing if these addresses could not
5837 be determined. Otherwise, set LOWPC to the low address if it is smaller,
5838 and HIGHPC to the high address if greater than HIGHPC. */
5841 dwarf2_get_subprogram_pc_bounds (struct die_info *die,
5842 CORE_ADDR *lowpc, CORE_ADDR *highpc,
5843 struct dwarf2_cu *cu)
5845 CORE_ADDR low, high;
5846 struct die_info *child = die->child;
5848 if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL))
5850 *lowpc = min (*lowpc, low);
5851 *highpc = max (*highpc, high);
5854 /* If the language does not allow nested subprograms (either inside
5855 subprograms or lexical blocks), we're done. */
5856 if (cu->language != language_ada)
5859 /* Check all the children of the given DIE. If it contains nested
5860 subprograms, then check their pc bounds. Likewise, we need to
5861 check lexical blocks as well, as they may also contain subprogram
5863 while (child && child->tag)
5865 if (child->tag == DW_TAG_subprogram
5866 || child->tag == DW_TAG_lexical_block)
5867 dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu);
5868 child = sibling_die (child);
5872 /* Get the low and high pc's represented by the scope DIE, and store
5873 them in *LOWPC and *HIGHPC. If the correct values can't be
5874 determined, set *LOWPC to -1 and *HIGHPC to 0. */
5877 get_scope_pc_bounds (struct die_info *die,
5878 CORE_ADDR *lowpc, CORE_ADDR *highpc,
5879 struct dwarf2_cu *cu)
5881 CORE_ADDR best_low = (CORE_ADDR) -1;
5882 CORE_ADDR best_high = (CORE_ADDR) 0;
5883 CORE_ADDR current_low, current_high;
5885 if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL))
5887 best_low = current_low;
5888 best_high = current_high;
5892 struct die_info *child = die->child;
5894 while (child && child->tag)
5896 switch (child->tag) {
5897 case DW_TAG_subprogram:
5898 dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu);
5900 case DW_TAG_namespace:
5902 /* FIXME: carlton/2004-01-16: Should we do this for
5903 DW_TAG_class_type/DW_TAG_structure_type, too? I think
5904 that current GCC's always emit the DIEs corresponding
5905 to definitions of methods of classes as children of a
5906 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
5907 the DIEs giving the declarations, which could be
5908 anywhere). But I don't see any reason why the
5909 standards says that they have to be there. */
5910 get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
5912 if (current_low != ((CORE_ADDR) -1))
5914 best_low = min (best_low, current_low);
5915 best_high = max (best_high, current_high);
5923 child = sibling_die (child);
5928 *highpc = best_high;
5931 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
5934 dwarf2_record_block_ranges (struct die_info *die, struct block *block,
5935 CORE_ADDR baseaddr, struct dwarf2_cu *cu)
5937 struct attribute *attr;
5939 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
5942 CORE_ADDR high = DW_ADDR (attr);
5944 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
5947 CORE_ADDR low = DW_ADDR (attr);
5949 record_block_range (block, baseaddr + low, baseaddr + high - 1);
5953 attr = dwarf2_attr (die, DW_AT_ranges, cu);
5956 bfd *obfd = cu->objfile->obfd;
5958 /* The value of the DW_AT_ranges attribute is the offset of the
5959 address range list in the .debug_ranges section. */
5960 unsigned long offset = DW_UNSND (attr);
5961 gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset;
5963 /* For some target architectures, but not others, the
5964 read_address function sign-extends the addresses it returns.
5965 To recognize base address selection entries, we need a
5967 unsigned int addr_size = cu->header.addr_size;
5968 CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
5970 /* The base address, to which the next pair is relative. Note
5971 that this 'base' is a DWARF concept: most entries in a range
5972 list are relative, to reduce the number of relocs against the
5973 debugging information. This is separate from this function's
5974 'baseaddr' argument, which GDB uses to relocate debugging
5975 information from a shared library based on the address at
5976 which the library was loaded. */
5977 CORE_ADDR base = cu->base_address;
5978 int base_known = cu->base_known;
5980 gdb_assert (dwarf2_per_objfile->ranges.readin);
5981 if (offset >= dwarf2_per_objfile->ranges.size)
5983 complaint (&symfile_complaints,
5984 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
5991 unsigned int bytes_read;
5992 CORE_ADDR start, end;
5994 start = read_address (obfd, buffer, cu, &bytes_read);
5995 buffer += bytes_read;
5996 end = read_address (obfd, buffer, cu, &bytes_read);
5997 buffer += bytes_read;
5999 /* Did we find the end of the range list? */
6000 if (start == 0 && end == 0)
6003 /* Did we find a base address selection entry? */
6004 else if ((start & base_select_mask) == base_select_mask)
6010 /* We found an ordinary address range. */
6015 complaint (&symfile_complaints,
6016 _("Invalid .debug_ranges data (no base address)"));
6020 record_block_range (block,
6021 baseaddr + base + start,
6022 baseaddr + base + end - 1);
6028 /* Add an aggregate field to the field list. */
6031 dwarf2_add_field (struct field_info *fip, struct die_info *die,
6032 struct dwarf2_cu *cu)
6034 struct objfile *objfile = cu->objfile;
6035 struct gdbarch *gdbarch = get_objfile_arch (objfile);
6036 struct nextfield *new_field;
6037 struct attribute *attr;
6039 char *fieldname = "";
6041 /* Allocate a new field list entry and link it in. */
6042 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
6043 make_cleanup (xfree, new_field);
6044 memset (new_field, 0, sizeof (struct nextfield));
6046 if (die->tag == DW_TAG_inheritance)
6048 new_field->next = fip->baseclasses;
6049 fip->baseclasses = new_field;
6053 new_field->next = fip->fields;
6054 fip->fields = new_field;
6058 /* Handle accessibility and virtuality of field.
6059 The default accessibility for members is public, the default
6060 accessibility for inheritance is private. */
6061 if (die->tag != DW_TAG_inheritance)
6062 new_field->accessibility = DW_ACCESS_public;
6064 new_field->accessibility = DW_ACCESS_private;
6065 new_field->virtuality = DW_VIRTUALITY_none;
6067 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
6069 new_field->accessibility = DW_UNSND (attr);
6070 if (new_field->accessibility != DW_ACCESS_public)
6071 fip->non_public_fields = 1;
6072 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
6074 new_field->virtuality = DW_UNSND (attr);
6076 fp = &new_field->field;
6078 if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
6080 /* Data member other than a C++ static data member. */
6082 /* Get type of field. */
6083 fp->type = die_type (die, cu);
6085 SET_FIELD_BITPOS (*fp, 0);
6087 /* Get bit size of field (zero if none). */
6088 attr = dwarf2_attr (die, DW_AT_bit_size, cu);
6091 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
6095 FIELD_BITSIZE (*fp) = 0;
6098 /* Get bit offset of field. */
6099 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
6102 int byte_offset = 0;
6104 if (attr_form_is_section_offset (attr))
6105 dwarf2_complex_location_expr_complaint ();
6106 else if (attr_form_is_constant (attr))
6107 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
6108 else if (attr_form_is_block (attr))
6109 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
6111 dwarf2_complex_location_expr_complaint ();
6113 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
6115 attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
6118 if (gdbarch_bits_big_endian (gdbarch))
6120 /* For big endian bits, the DW_AT_bit_offset gives the
6121 additional bit offset from the MSB of the containing
6122 anonymous object to the MSB of the field. We don't
6123 have to do anything special since we don't need to
6124 know the size of the anonymous object. */
6125 FIELD_BITPOS (*fp) += DW_UNSND (attr);
6129 /* For little endian bits, compute the bit offset to the
6130 MSB of the anonymous object, subtract off the number of
6131 bits from the MSB of the field to the MSB of the
6132 object, and then subtract off the number of bits of
6133 the field itself. The result is the bit offset of
6134 the LSB of the field. */
6136 int bit_offset = DW_UNSND (attr);
6138 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6141 /* The size of the anonymous object containing
6142 the bit field is explicit, so use the
6143 indicated size (in bytes). */
6144 anonymous_size = DW_UNSND (attr);
6148 /* The size of the anonymous object containing
6149 the bit field must be inferred from the type
6150 attribute of the data member containing the
6152 anonymous_size = TYPE_LENGTH (fp->type);
6154 FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
6155 - bit_offset - FIELD_BITSIZE (*fp);
6159 /* Get name of field. */
6160 fieldname = dwarf2_name (die, cu);
6161 if (fieldname == NULL)
6164 /* The name is already allocated along with this objfile, so we don't
6165 need to duplicate it for the type. */
6166 fp->name = fieldname;
6168 /* Change accessibility for artificial fields (e.g. virtual table
6169 pointer or virtual base class pointer) to private. */
6170 if (dwarf2_attr (die, DW_AT_artificial, cu))
6172 FIELD_ARTIFICIAL (*fp) = 1;
6173 new_field->accessibility = DW_ACCESS_private;
6174 fip->non_public_fields = 1;
6177 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
6179 /* C++ static member. */
6181 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
6182 is a declaration, but all versions of G++ as of this writing
6183 (so through at least 3.2.1) incorrectly generate
6184 DW_TAG_variable tags. */
6188 /* Get name of field. */
6189 fieldname = dwarf2_name (die, cu);
6190 if (fieldname == NULL)
6193 attr = dwarf2_attr (die, DW_AT_const_value, cu);
6195 /* Only create a symbol if this is an external value.
6196 new_symbol checks this and puts the value in the global symbol
6197 table, which we want. If it is not external, new_symbol
6198 will try to put the value in cu->list_in_scope which is wrong. */
6199 && dwarf2_flag_true_p (die, DW_AT_external, cu))
6201 /* A static const member, not much different than an enum as far as
6202 we're concerned, except that we can support more types. */
6203 new_symbol (die, NULL, cu);
6206 /* Get physical name. */
6207 physname = (char *) dwarf2_physname (fieldname, die, cu);
6209 /* The name is already allocated along with this objfile, so we don't
6210 need to duplicate it for the type. */
6211 SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
6212 FIELD_TYPE (*fp) = die_type (die, cu);
6213 FIELD_NAME (*fp) = fieldname;
6215 else if (die->tag == DW_TAG_inheritance)
6217 /* C++ base class field. */
6218 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
6221 int byte_offset = 0;
6223 if (attr_form_is_section_offset (attr))
6224 dwarf2_complex_location_expr_complaint ();
6225 else if (attr_form_is_constant (attr))
6226 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
6227 else if (attr_form_is_block (attr))
6228 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
6230 dwarf2_complex_location_expr_complaint ();
6232 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
6234 FIELD_BITSIZE (*fp) = 0;
6235 FIELD_TYPE (*fp) = die_type (die, cu);
6236 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
6237 fip->nbaseclasses++;
6241 /* Add a typedef defined in the scope of the FIP's class. */
6244 dwarf2_add_typedef (struct field_info *fip, struct die_info *die,
6245 struct dwarf2_cu *cu)
6247 struct objfile *objfile = cu->objfile;
6248 struct gdbarch *gdbarch = get_objfile_arch (objfile);
6249 struct typedef_field_list *new_field;
6250 struct attribute *attr;
6251 struct typedef_field *fp;
6252 char *fieldname = "";
6254 /* Allocate a new field list entry and link it in. */
6255 new_field = xzalloc (sizeof (*new_field));
6256 make_cleanup (xfree, new_field);
6258 gdb_assert (die->tag == DW_TAG_typedef);
6260 fp = &new_field->field;
6262 /* Get name of field. */
6263 fp->name = dwarf2_name (die, cu);
6264 if (fp->name == NULL)
6267 fp->type = read_type_die (die, cu);
6269 new_field->next = fip->typedef_field_list;
6270 fip->typedef_field_list = new_field;
6271 fip->typedef_field_list_count++;
6274 /* Create the vector of fields, and attach it to the type. */
6277 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
6278 struct dwarf2_cu *cu)
6280 int nfields = fip->nfields;
6282 /* Record the field count, allocate space for the array of fields,
6283 and create blank accessibility bitfields if necessary. */
6284 TYPE_NFIELDS (type) = nfields;
6285 TYPE_FIELDS (type) = (struct field *)
6286 TYPE_ALLOC (type, sizeof (struct field) * nfields);
6287 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
6289 if (fip->non_public_fields && cu->language != language_ada)
6291 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6293 TYPE_FIELD_PRIVATE_BITS (type) =
6294 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
6295 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
6297 TYPE_FIELD_PROTECTED_BITS (type) =
6298 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
6299 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
6301 TYPE_FIELD_IGNORE_BITS (type) =
6302 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
6303 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
6306 /* If the type has baseclasses, allocate and clear a bit vector for
6307 TYPE_FIELD_VIRTUAL_BITS. */
6308 if (fip->nbaseclasses && cu->language != language_ada)
6310 int num_bytes = B_BYTES (fip->nbaseclasses);
6311 unsigned char *pointer;
6313 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6314 pointer = TYPE_ALLOC (type, num_bytes);
6315 TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
6316 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
6317 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
6320 /* Copy the saved-up fields into the field vector. Start from the head
6321 of the list, adding to the tail of the field array, so that they end
6322 up in the same order in the array in which they were added to the list. */
6323 while (nfields-- > 0)
6325 struct nextfield *fieldp;
6329 fieldp = fip->fields;
6330 fip->fields = fieldp->next;
6334 fieldp = fip->baseclasses;
6335 fip->baseclasses = fieldp->next;
6338 TYPE_FIELD (type, nfields) = fieldp->field;
6339 switch (fieldp->accessibility)
6341 case DW_ACCESS_private:
6342 if (cu->language != language_ada)
6343 SET_TYPE_FIELD_PRIVATE (type, nfields);
6346 case DW_ACCESS_protected:
6347 if (cu->language != language_ada)
6348 SET_TYPE_FIELD_PROTECTED (type, nfields);
6351 case DW_ACCESS_public:
6355 /* Unknown accessibility. Complain and treat it as public. */
6357 complaint (&symfile_complaints, _("unsupported accessibility %d"),
6358 fieldp->accessibility);
6362 if (nfields < fip->nbaseclasses)
6364 switch (fieldp->virtuality)
6366 case DW_VIRTUALITY_virtual:
6367 case DW_VIRTUALITY_pure_virtual:
6368 if (cu->language == language_ada)
6369 error ("unexpected virtuality in component of Ada type");
6370 SET_TYPE_FIELD_VIRTUAL (type, nfields);
6377 /* Add a member function to the proper fieldlist. */
6380 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
6381 struct type *type, struct dwarf2_cu *cu)
6383 struct objfile *objfile = cu->objfile;
6384 struct attribute *attr;
6385 struct fnfieldlist *flp;
6387 struct fn_field *fnp;
6389 struct nextfnfield *new_fnfield;
6390 struct type *this_type;
6392 if (cu->language == language_ada)
6393 error ("unexpected member function in Ada type");
6395 /* Get name of member function. */
6396 fieldname = dwarf2_name (die, cu);
6397 if (fieldname == NULL)
6400 /* Look up member function name in fieldlist. */
6401 for (i = 0; i < fip->nfnfields; i++)
6403 if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
6407 /* Create new list element if necessary. */
6408 if (i < fip->nfnfields)
6409 flp = &fip->fnfieldlists[i];
6412 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
6414 fip->fnfieldlists = (struct fnfieldlist *)
6415 xrealloc (fip->fnfieldlists,
6416 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
6417 * sizeof (struct fnfieldlist));
6418 if (fip->nfnfields == 0)
6419 make_cleanup (free_current_contents, &fip->fnfieldlists);
6421 flp = &fip->fnfieldlists[fip->nfnfields];
6422 flp->name = fieldname;
6425 i = fip->nfnfields++;
6428 /* Create a new member function field and chain it to the field list
6430 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
6431 make_cleanup (xfree, new_fnfield);
6432 memset (new_fnfield, 0, sizeof (struct nextfnfield));
6433 new_fnfield->next = flp->head;
6434 flp->head = new_fnfield;
6437 /* Fill in the member function field info. */
6438 fnp = &new_fnfield->fnfield;
6440 /* Delay processing of the physname until later. */
6441 if (cu->language == language_cplus || cu->language == language_java)
6443 add_to_method_list (type, i, flp->length - 1, fieldname,
6448 char *physname = (char *) dwarf2_physname (fieldname, die, cu);
6449 fnp->physname = physname ? physname : "";
6452 fnp->type = alloc_type (objfile);
6453 this_type = read_type_die (die, cu);
6454 if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC)
6456 int nparams = TYPE_NFIELDS (this_type);
6458 /* TYPE is the domain of this method, and THIS_TYPE is the type
6459 of the method itself (TYPE_CODE_METHOD). */
6460 smash_to_method_type (fnp->type, type,
6461 TYPE_TARGET_TYPE (this_type),
6462 TYPE_FIELDS (this_type),
6463 TYPE_NFIELDS (this_type),
6464 TYPE_VARARGS (this_type));
6466 /* Handle static member functions.
6467 Dwarf2 has no clean way to discern C++ static and non-static
6468 member functions. G++ helps GDB by marking the first
6469 parameter for non-static member functions (which is the
6470 this pointer) as artificial. We obtain this information
6471 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
6472 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0)
6473 fnp->voffset = VOFFSET_STATIC;
6476 complaint (&symfile_complaints, _("member function type missing for '%s'"),
6477 dwarf2_full_name (fieldname, die, cu));
6479 /* Get fcontext from DW_AT_containing_type if present. */
6480 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
6481 fnp->fcontext = die_containing_type (die, cu);
6483 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
6484 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
6486 /* Get accessibility. */
6487 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
6490 switch (DW_UNSND (attr))
6492 case DW_ACCESS_private:
6493 fnp->is_private = 1;
6495 case DW_ACCESS_protected:
6496 fnp->is_protected = 1;
6501 /* Check for artificial methods. */
6502 attr = dwarf2_attr (die, DW_AT_artificial, cu);
6503 if (attr && DW_UNSND (attr) != 0)
6504 fnp->is_artificial = 1;
6506 /* Get index in virtual function table if it is a virtual member
6507 function. For older versions of GCC, this is an offset in the
6508 appropriate virtual table, as specified by DW_AT_containing_type.
6509 For everyone else, it is an expression to be evaluated relative
6510 to the object address. */
6512 attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
6515 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0)
6517 if (DW_BLOCK (attr)->data[0] == DW_OP_constu)
6519 /* Old-style GCC. */
6520 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
6522 else if (DW_BLOCK (attr)->data[0] == DW_OP_deref
6523 || (DW_BLOCK (attr)->size > 1
6524 && DW_BLOCK (attr)->data[0] == DW_OP_deref_size
6525 && DW_BLOCK (attr)->data[1] == cu->header.addr_size))
6527 struct dwarf_block blk;
6530 offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref
6532 blk.size = DW_BLOCK (attr)->size - offset;
6533 blk.data = DW_BLOCK (attr)->data + offset;
6534 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu);
6535 if ((fnp->voffset % cu->header.addr_size) != 0)
6536 dwarf2_complex_location_expr_complaint ();
6538 fnp->voffset /= cu->header.addr_size;
6542 dwarf2_complex_location_expr_complaint ();
6545 fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0));
6547 else if (attr_form_is_section_offset (attr))
6549 dwarf2_complex_location_expr_complaint ();
6553 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
6559 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
6560 if (attr && DW_UNSND (attr))
6562 /* GCC does this, as of 2008-08-25; PR debug/37237. */
6563 complaint (&symfile_complaints,
6564 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
6565 fieldname, die->offset);
6566 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6567 TYPE_CPLUS_DYNAMIC (type) = 1;
6572 /* Create the vector of member function fields, and attach it to the type. */
6575 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
6576 struct dwarf2_cu *cu)
6578 struct fnfieldlist *flp;
6579 int total_length = 0;
6582 if (cu->language == language_ada)
6583 error ("unexpected member functions in Ada type");
6585 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6586 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
6587 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
6589 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
6591 struct nextfnfield *nfp = flp->head;
6592 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
6595 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
6596 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
6597 fn_flp->fn_fields = (struct fn_field *)
6598 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
6599 for (k = flp->length; (k--, nfp); nfp = nfp->next)
6600 fn_flp->fn_fields[k] = nfp->fnfield;
6602 total_length += flp->length;
6605 TYPE_NFN_FIELDS (type) = fip->nfnfields;
6606 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
6609 /* Returns non-zero if NAME is the name of a vtable member in CU's
6610 language, zero otherwise. */
6612 is_vtable_name (const char *name, struct dwarf2_cu *cu)
6614 static const char vptr[] = "_vptr";
6615 static const char vtable[] = "vtable";
6617 /* Look for the C++ and Java forms of the vtable. */
6618 if ((cu->language == language_java
6619 && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
6620 || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
6621 && is_cplus_marker (name[sizeof (vptr) - 1])))
6627 /* GCC outputs unnamed structures that are really pointers to member
6628 functions, with the ABI-specified layout. If TYPE describes
6629 such a structure, smash it into a member function type.
6631 GCC shouldn't do this; it should just output pointer to member DIEs.
6632 This is GCC PR debug/28767. */
6635 quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile)
6637 struct type *pfn_type, *domain_type, *new_type;
6639 /* Check for a structure with no name and two children. */
6640 if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2)
6643 /* Check for __pfn and __delta members. */
6644 if (TYPE_FIELD_NAME (type, 0) == NULL
6645 || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0
6646 || TYPE_FIELD_NAME (type, 1) == NULL
6647 || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0)
6650 /* Find the type of the method. */
6651 pfn_type = TYPE_FIELD_TYPE (type, 0);
6652 if (pfn_type == NULL
6653 || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
6654 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
6657 /* Look for the "this" argument. */
6658 pfn_type = TYPE_TARGET_TYPE (pfn_type);
6659 if (TYPE_NFIELDS (pfn_type) == 0
6660 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
6661 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
6664 domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
6665 new_type = alloc_type (objfile);
6666 smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type),
6667 TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
6668 TYPE_VARARGS (pfn_type));
6669 smash_to_methodptr_type (type, new_type);
6672 /* Called when we find the DIE that starts a structure or union scope
6673 (definition) to create a type for the structure or union. Fill in
6674 the type's name and general properties; the members will not be
6675 processed until process_structure_type.
6677 NOTE: we need to call these functions regardless of whether or not the
6678 DIE has a DW_AT_name attribute, since it might be an anonymous
6679 structure or union. This gets the type entered into our set of
6682 However, if the structure is incomplete (an opaque struct/union)
6683 then suppress creating a symbol table entry for it since gdb only
6684 wants to find the one with the complete definition. Note that if
6685 it is complete, we just call new_symbol, which does it's own
6686 checking about whether the struct/union is anonymous or not (and
6687 suppresses creating a symbol table entry itself). */
6689 static struct type *
6690 read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
6692 struct objfile *objfile = cu->objfile;
6694 struct attribute *attr;
6697 /* If the definition of this type lives in .debug_types, read that type.
6698 Don't follow DW_AT_specification though, that will take us back up
6699 the chain and we want to go down. */
6700 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
6703 struct dwarf2_cu *type_cu = cu;
6704 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
6706 /* We could just recurse on read_structure_type, but we need to call
6707 get_die_type to ensure only one type for this DIE is created.
6708 This is important, for example, because for c++ classes we need
6709 TYPE_NAME set which is only done by new_symbol. Blech. */
6710 type = read_type_die (type_die, type_cu);
6712 /* TYPE_CU may not be the same as CU.
6713 Ensure TYPE is recorded in CU's type_hash table. */
6714 return set_die_type (die, type, cu);
6717 type = alloc_type (objfile);
6718 INIT_CPLUS_SPECIFIC (type);
6720 name = dwarf2_name (die, cu);
6723 if (cu->language == language_cplus
6724 || cu->language == language_java)
6726 char *full_name = (char *) dwarf2_full_name (name, die, cu);
6728 /* dwarf2_full_name might have already finished building the DIE's
6729 type. If so, there is no need to continue. */
6730 if (get_die_type (die, cu) != NULL)
6731 return get_die_type (die, cu);
6733 TYPE_TAG_NAME (type) = full_name;
6734 if (die->tag == DW_TAG_structure_type
6735 || die->tag == DW_TAG_class_type)
6736 TYPE_NAME (type) = TYPE_TAG_NAME (type);
6740 /* The name is already allocated along with this objfile, so
6741 we don't need to duplicate it for the type. */
6742 TYPE_TAG_NAME (type) = (char *) name;
6743 if (die->tag == DW_TAG_class_type)
6744 TYPE_NAME (type) = TYPE_TAG_NAME (type);
6748 if (die->tag == DW_TAG_structure_type)
6750 TYPE_CODE (type) = TYPE_CODE_STRUCT;
6752 else if (die->tag == DW_TAG_union_type)
6754 TYPE_CODE (type) = TYPE_CODE_UNION;
6758 TYPE_CODE (type) = TYPE_CODE_CLASS;
6761 if (cu->language == language_cplus && die->tag == DW_TAG_class_type)
6762 TYPE_DECLARED_CLASS (type) = 1;
6764 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6767 TYPE_LENGTH (type) = DW_UNSND (attr);
6771 TYPE_LENGTH (type) = 0;
6774 TYPE_STUB_SUPPORTED (type) = 1;
6775 if (die_is_declaration (die, cu))
6776 TYPE_STUB (type) = 1;
6777 else if (attr == NULL && die->child == NULL
6778 && producer_is_realview (cu->producer))
6779 /* RealView does not output the required DW_AT_declaration
6780 on incomplete types. */
6781 TYPE_STUB (type) = 1;
6783 /* We need to add the type field to the die immediately so we don't
6784 infinitely recurse when dealing with pointers to the structure
6785 type within the structure itself. */
6786 set_die_type (die, type, cu);
6788 /* set_die_type should be already done. */
6789 set_descriptive_type (type, die, cu);
6794 /* Finish creating a structure or union type, including filling in
6795 its members and creating a symbol for it. */
6798 process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
6800 struct objfile *objfile = cu->objfile;
6801 struct die_info *child_die = die->child;
6804 type = get_die_type (die, cu);
6806 type = read_structure_type (die, cu);
6808 if (die->child != NULL && ! die_is_declaration (die, cu))
6810 struct field_info fi;
6811 struct die_info *child_die;
6812 VEC (symbolp) *template_args = NULL;
6813 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
6815 memset (&fi, 0, sizeof (struct field_info));
6817 child_die = die->child;
6819 while (child_die && child_die->tag)
6821 if (child_die->tag == DW_TAG_member
6822 || child_die->tag == DW_TAG_variable)
6824 /* NOTE: carlton/2002-11-05: A C++ static data member
6825 should be a DW_TAG_member that is a declaration, but
6826 all versions of G++ as of this writing (so through at
6827 least 3.2.1) incorrectly generate DW_TAG_variable
6828 tags for them instead. */
6829 dwarf2_add_field (&fi, child_die, cu);
6831 else if (child_die->tag == DW_TAG_subprogram)
6833 /* C++ member function. */
6834 dwarf2_add_member_fn (&fi, child_die, type, cu);
6836 else if (child_die->tag == DW_TAG_inheritance)
6838 /* C++ base class field. */
6839 dwarf2_add_field (&fi, child_die, cu);
6841 else if (child_die->tag == DW_TAG_typedef)
6842 dwarf2_add_typedef (&fi, child_die, cu);
6843 else if (child_die->tag == DW_TAG_template_type_param
6844 || child_die->tag == DW_TAG_template_value_param)
6846 struct symbol *arg = new_symbol (child_die, NULL, cu);
6849 VEC_safe_push (symbolp, template_args, arg);
6852 child_die = sibling_die (child_die);
6855 /* Attach template arguments to type. */
6856 if (! VEC_empty (symbolp, template_args))
6858 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6859 TYPE_N_TEMPLATE_ARGUMENTS (type)
6860 = VEC_length (symbolp, template_args);
6861 TYPE_TEMPLATE_ARGUMENTS (type)
6862 = obstack_alloc (&objfile->objfile_obstack,
6863 (TYPE_N_TEMPLATE_ARGUMENTS (type)
6864 * sizeof (struct symbol *)));
6865 memcpy (TYPE_TEMPLATE_ARGUMENTS (type),
6866 VEC_address (symbolp, template_args),
6867 (TYPE_N_TEMPLATE_ARGUMENTS (type)
6868 * sizeof (struct symbol *)));
6869 VEC_free (symbolp, template_args);
6872 /* Attach fields and member functions to the type. */
6874 dwarf2_attach_fields_to_type (&fi, type, cu);
6877 dwarf2_attach_fn_fields_to_type (&fi, type, cu);
6879 /* Get the type which refers to the base class (possibly this
6880 class itself) which contains the vtable pointer for the current
6881 class from the DW_AT_containing_type attribute. This use of
6882 DW_AT_containing_type is a GNU extension. */
6884 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
6886 struct type *t = die_containing_type (die, cu);
6888 TYPE_VPTR_BASETYPE (type) = t;
6893 /* Our own class provides vtbl ptr. */
6894 for (i = TYPE_NFIELDS (t) - 1;
6895 i >= TYPE_N_BASECLASSES (t);
6898 char *fieldname = TYPE_FIELD_NAME (t, i);
6900 if (is_vtable_name (fieldname, cu))
6902 TYPE_VPTR_FIELDNO (type) = i;
6907 /* Complain if virtual function table field not found. */
6908 if (i < TYPE_N_BASECLASSES (t))
6909 complaint (&symfile_complaints,
6910 _("virtual function table pointer not found when defining class '%s'"),
6911 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
6916 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
6919 else if (cu->producer
6920 && strncmp (cu->producer,
6921 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
6923 /* The IBM XLC compiler does not provide direct indication
6924 of the containing type, but the vtable pointer is
6925 always named __vfp. */
6929 for (i = TYPE_NFIELDS (type) - 1;
6930 i >= TYPE_N_BASECLASSES (type);
6933 if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
6935 TYPE_VPTR_FIELDNO (type) = i;
6936 TYPE_VPTR_BASETYPE (type) = type;
6943 /* Copy fi.typedef_field_list linked list elements content into the
6944 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
6945 if (fi.typedef_field_list)
6947 int i = fi.typedef_field_list_count;
6949 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6950 TYPE_TYPEDEF_FIELD_ARRAY (type)
6951 = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i);
6952 TYPE_TYPEDEF_FIELD_COUNT (type) = i;
6954 /* Reverse the list order to keep the debug info elements order. */
6957 struct typedef_field *dest, *src;
6959 dest = &TYPE_TYPEDEF_FIELD (type, i);
6960 src = &fi.typedef_field_list->field;
6961 fi.typedef_field_list = fi.typedef_field_list->next;
6966 do_cleanups (back_to);
6969 quirk_gcc_member_function_pointer (type, cu->objfile);
6971 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
6972 snapshots) has been known to create a die giving a declaration
6973 for a class that has, as a child, a die giving a definition for a
6974 nested class. So we have to process our children even if the
6975 current die is a declaration. Normally, of course, a declaration
6976 won't have any children at all. */
6978 while (child_die != NULL && child_die->tag)
6980 if (child_die->tag == DW_TAG_member
6981 || child_die->tag == DW_TAG_variable
6982 || child_die->tag == DW_TAG_inheritance
6983 || child_die->tag == DW_TAG_template_value_param
6984 || child_die->tag == DW_TAG_template_type_param)
6989 process_die (child_die, cu);
6991 child_die = sibling_die (child_die);
6994 /* Do not consider external references. According to the DWARF standard,
6995 these DIEs are identified by the fact that they have no byte_size
6996 attribute, and a declaration attribute. */
6997 if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
6998 || !die_is_declaration (die, cu))
6999 new_symbol (die, type, cu);
7002 /* Given a DW_AT_enumeration_type die, set its type. We do not
7003 complete the type's fields yet, or create any symbols. */
7005 static struct type *
7006 read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
7008 struct objfile *objfile = cu->objfile;
7010 struct attribute *attr;
7013 /* If the definition of this type lives in .debug_types, read that type.
7014 Don't follow DW_AT_specification though, that will take us back up
7015 the chain and we want to go down. */
7016 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
7019 struct dwarf2_cu *type_cu = cu;
7020 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
7022 type = read_type_die (type_die, type_cu);
7024 /* TYPE_CU may not be the same as CU.
7025 Ensure TYPE is recorded in CU's type_hash table. */
7026 return set_die_type (die, type, cu);
7029 type = alloc_type (objfile);
7031 TYPE_CODE (type) = TYPE_CODE_ENUM;
7032 name = dwarf2_full_name (NULL, die, cu);
7034 TYPE_TAG_NAME (type) = (char *) name;
7036 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7039 TYPE_LENGTH (type) = DW_UNSND (attr);
7043 TYPE_LENGTH (type) = 0;
7046 /* The enumeration DIE can be incomplete. In Ada, any type can be
7047 declared as private in the package spec, and then defined only
7048 inside the package body. Such types are known as Taft Amendment
7049 Types. When another package uses such a type, an incomplete DIE
7050 may be generated by the compiler. */
7051 if (die_is_declaration (die, cu))
7052 TYPE_STUB (type) = 1;
7054 return set_die_type (die, type, cu);
7057 /* Given a pointer to a die which begins an enumeration, process all
7058 the dies that define the members of the enumeration, and create the
7059 symbol for the enumeration type.
7061 NOTE: We reverse the order of the element list. */
7064 process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
7066 struct type *this_type;
7068 this_type = get_die_type (die, cu);
7069 if (this_type == NULL)
7070 this_type = read_enumeration_type (die, cu);
7072 if (die->child != NULL)
7074 struct die_info *child_die;
7076 struct field *fields = NULL;
7078 int unsigned_enum = 1;
7081 child_die = die->child;
7082 while (child_die && child_die->tag)
7084 if (child_die->tag != DW_TAG_enumerator)
7086 process_die (child_die, cu);
7090 name = dwarf2_name (child_die, cu);
7093 sym = new_symbol (child_die, this_type, cu);
7094 if (SYMBOL_VALUE (sym) < 0)
7097 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
7099 fields = (struct field *)
7101 (num_fields + DW_FIELD_ALLOC_CHUNK)
7102 * sizeof (struct field));
7105 FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym);
7106 FIELD_TYPE (fields[num_fields]) = NULL;
7107 SET_FIELD_BITPOS (fields[num_fields], SYMBOL_VALUE (sym));
7108 FIELD_BITSIZE (fields[num_fields]) = 0;
7114 child_die = sibling_die (child_die);
7119 TYPE_NFIELDS (this_type) = num_fields;
7120 TYPE_FIELDS (this_type) = (struct field *)
7121 TYPE_ALLOC (this_type, sizeof (struct field) * num_fields);
7122 memcpy (TYPE_FIELDS (this_type), fields,
7123 sizeof (struct field) * num_fields);
7127 TYPE_UNSIGNED (this_type) = 1;
7130 new_symbol (die, this_type, cu);
7133 /* Extract all information from a DW_TAG_array_type DIE and put it in
7134 the DIE's type field. For now, this only handles one dimensional
7137 static struct type *
7138 read_array_type (struct die_info *die, struct dwarf2_cu *cu)
7140 struct objfile *objfile = cu->objfile;
7141 struct die_info *child_die;
7143 struct type *element_type, *range_type, *index_type;
7144 struct type **range_types = NULL;
7145 struct attribute *attr;
7147 struct cleanup *back_to;
7150 element_type = die_type (die, cu);
7152 /* The die_type call above may have already set the type for this DIE. */
7153 type = get_die_type (die, cu);
7157 /* Irix 6.2 native cc creates array types without children for
7158 arrays with unspecified length. */
7159 if (die->child == NULL)
7161 index_type = objfile_type (objfile)->builtin_int;
7162 range_type = create_range_type (NULL, index_type, 0, -1);
7163 type = create_array_type (NULL, element_type, range_type);
7164 return set_die_type (die, type, cu);
7167 back_to = make_cleanup (null_cleanup, NULL);
7168 child_die = die->child;
7169 while (child_die && child_die->tag)
7171 if (child_die->tag == DW_TAG_subrange_type)
7173 struct type *child_type = read_type_die (child_die, cu);
7175 if (child_type != NULL)
7177 /* The range type was succesfully read. Save it for
7178 the array type creation. */
7179 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
7181 range_types = (struct type **)
7182 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
7183 * sizeof (struct type *));
7185 make_cleanup (free_current_contents, &range_types);
7187 range_types[ndim++] = child_type;
7190 child_die = sibling_die (child_die);
7193 /* Dwarf2 dimensions are output from left to right, create the
7194 necessary array types in backwards order. */
7196 type = element_type;
7198 if (read_array_order (die, cu) == DW_ORD_col_major)
7203 type = create_array_type (NULL, type, range_types[i++]);
7208 type = create_array_type (NULL, type, range_types[ndim]);
7211 /* Understand Dwarf2 support for vector types (like they occur on
7212 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
7213 array type. This is not part of the Dwarf2/3 standard yet, but a
7214 custom vendor extension. The main difference between a regular
7215 array and the vector variant is that vectors are passed by value
7217 attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
7219 make_vector_type (type);
7221 name = dwarf2_name (die, cu);
7223 TYPE_NAME (type) = name;
7225 /* Install the type in the die. */
7226 set_die_type (die, type, cu);
7228 /* set_die_type should be already done. */
7229 set_descriptive_type (type, die, cu);
7231 do_cleanups (back_to);
7236 static enum dwarf_array_dim_ordering
7237 read_array_order (struct die_info *die, struct dwarf2_cu *cu)
7239 struct attribute *attr;
7241 attr = dwarf2_attr (die, DW_AT_ordering, cu);
7243 if (attr) return DW_SND (attr);
7246 GNU F77 is a special case, as at 08/2004 array type info is the
7247 opposite order to the dwarf2 specification, but data is still
7248 laid out as per normal fortran.
7250 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
7254 if (cu->language == language_fortran
7255 && cu->producer && strstr (cu->producer, "GNU F77"))
7257 return DW_ORD_row_major;
7260 switch (cu->language_defn->la_array_ordering)
7262 case array_column_major:
7263 return DW_ORD_col_major;
7264 case array_row_major:
7266 return DW_ORD_row_major;
7270 /* Extract all information from a DW_TAG_set_type DIE and put it in
7271 the DIE's type field. */
7273 static struct type *
7274 read_set_type (struct die_info *die, struct dwarf2_cu *cu)
7276 struct type *domain_type, *set_type;
7277 struct attribute *attr;
7279 domain_type = die_type (die, cu);
7281 /* The die_type call above may have already set the type for this DIE. */
7282 set_type = get_die_type (die, cu);
7286 set_type = create_set_type (NULL, domain_type);
7288 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7290 TYPE_LENGTH (set_type) = DW_UNSND (attr);
7292 return set_die_type (die, set_type, cu);
7295 /* First cut: install each common block member as a global variable. */
7298 read_common_block (struct die_info *die, struct dwarf2_cu *cu)
7300 struct die_info *child_die;
7301 struct attribute *attr;
7303 CORE_ADDR base = (CORE_ADDR) 0;
7305 attr = dwarf2_attr (die, DW_AT_location, cu);
7308 /* Support the .debug_loc offsets */
7309 if (attr_form_is_block (attr))
7311 base = decode_locdesc (DW_BLOCK (attr), cu);
7313 else if (attr_form_is_section_offset (attr))
7315 dwarf2_complex_location_expr_complaint ();
7319 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
7320 "common block member");
7323 if (die->child != NULL)
7325 child_die = die->child;
7326 while (child_die && child_die->tag)
7328 sym = new_symbol (child_die, NULL, cu);
7329 attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu);
7330 if (sym != NULL && attr != NULL)
7332 CORE_ADDR byte_offset = 0;
7334 if (attr_form_is_section_offset (attr))
7335 dwarf2_complex_location_expr_complaint ();
7336 else if (attr_form_is_constant (attr))
7337 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
7338 else if (attr_form_is_block (attr))
7339 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
7341 dwarf2_complex_location_expr_complaint ();
7343 SYMBOL_VALUE_ADDRESS (sym) = base + byte_offset;
7344 add_symbol_to_list (sym, &global_symbols);
7346 child_die = sibling_die (child_die);
7351 /* Create a type for a C++ namespace. */
7353 static struct type *
7354 read_namespace_type (struct die_info *die, struct dwarf2_cu *cu)
7356 struct objfile *objfile = cu->objfile;
7357 const char *previous_prefix, *name;
7361 /* For extensions, reuse the type of the original namespace. */
7362 if (dwarf2_attr (die, DW_AT_extension, cu) != NULL)
7364 struct die_info *ext_die;
7365 struct dwarf2_cu *ext_cu = cu;
7367 ext_die = dwarf2_extension (die, &ext_cu);
7368 type = read_type_die (ext_die, ext_cu);
7370 /* EXT_CU may not be the same as CU.
7371 Ensure TYPE is recorded in CU's type_hash table. */
7372 return set_die_type (die, type, cu);
7375 name = namespace_name (die, &is_anonymous, cu);
7377 /* Now build the name of the current namespace. */
7379 previous_prefix = determine_prefix (die, cu);
7380 if (previous_prefix[0] != '\0')
7381 name = typename_concat (&objfile->objfile_obstack,
7382 previous_prefix, name, 0, cu);
7384 /* Create the type. */
7385 type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL,
7387 TYPE_NAME (type) = (char *) name;
7388 TYPE_TAG_NAME (type) = TYPE_NAME (type);
7390 return set_die_type (die, type, cu);
7393 /* Read a C++ namespace. */
7396 read_namespace (struct die_info *die, struct dwarf2_cu *cu)
7398 struct objfile *objfile = cu->objfile;
7402 /* Add a symbol associated to this if we haven't seen the namespace
7403 before. Also, add a using directive if it's an anonymous
7406 if (dwarf2_attr (die, DW_AT_extension, cu) == NULL)
7410 type = read_type_die (die, cu);
7411 new_symbol (die, type, cu);
7413 name = namespace_name (die, &is_anonymous, cu);
7416 const char *previous_prefix = determine_prefix (die, cu);
7418 cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL,
7419 NULL, &objfile->objfile_obstack);
7423 if (die->child != NULL)
7425 struct die_info *child_die = die->child;
7427 while (child_die && child_die->tag)
7429 process_die (child_die, cu);
7430 child_die = sibling_die (child_die);
7435 /* Read a Fortran module as type. This DIE can be only a declaration used for
7436 imported module. Still we need that type as local Fortran "use ... only"
7437 declaration imports depend on the created type in determine_prefix. */
7439 static struct type *
7440 read_module_type (struct die_info *die, struct dwarf2_cu *cu)
7442 struct objfile *objfile = cu->objfile;
7446 module_name = dwarf2_name (die, cu);
7448 complaint (&symfile_complaints, _("DW_TAG_module has no name, offset 0x%x"),
7450 type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile);
7452 /* determine_prefix uses TYPE_TAG_NAME. */
7453 TYPE_TAG_NAME (type) = TYPE_NAME (type);
7455 return set_die_type (die, type, cu);
7458 /* Read a Fortran module. */
7461 read_module (struct die_info *die, struct dwarf2_cu *cu)
7463 struct die_info *child_die = die->child;
7465 while (child_die && child_die->tag)
7467 process_die (child_die, cu);
7468 child_die = sibling_die (child_die);
7472 /* Return the name of the namespace represented by DIE. Set
7473 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
7477 namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
7479 struct die_info *current_die;
7480 const char *name = NULL;
7482 /* Loop through the extensions until we find a name. */
7484 for (current_die = die;
7485 current_die != NULL;
7486 current_die = dwarf2_extension (die, &cu))
7488 name = dwarf2_name (current_die, cu);
7493 /* Is it an anonymous namespace? */
7495 *is_anonymous = (name == NULL);
7497 name = "(anonymous namespace)";
7502 /* Extract all information from a DW_TAG_pointer_type DIE and add to
7503 the user defined type vector. */
7505 static struct type *
7506 read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
7508 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
7509 struct comp_unit_head *cu_header = &cu->header;
7511 struct attribute *attr_byte_size;
7512 struct attribute *attr_address_class;
7513 int byte_size, addr_class;
7514 struct type *target_type;
7516 target_type = die_type (die, cu);
7518 /* The die_type call above may have already set the type for this DIE. */
7519 type = get_die_type (die, cu);
7523 type = lookup_pointer_type (target_type);
7525 attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
7527 byte_size = DW_UNSND (attr_byte_size);
7529 byte_size = cu_header->addr_size;
7531 attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
7532 if (attr_address_class)
7533 addr_class = DW_UNSND (attr_address_class);
7535 addr_class = DW_ADDR_none;
7537 /* If the pointer size or address class is different than the
7538 default, create a type variant marked as such and set the
7539 length accordingly. */
7540 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
7542 if (gdbarch_address_class_type_flags_p (gdbarch))
7546 type_flags = gdbarch_address_class_type_flags
7547 (gdbarch, byte_size, addr_class);
7548 gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
7550 type = make_type_with_address_space (type, type_flags);
7552 else if (TYPE_LENGTH (type) != byte_size)
7554 complaint (&symfile_complaints, _("invalid pointer size %d"), byte_size);
7558 /* Should we also complain about unhandled address classes? */
7562 TYPE_LENGTH (type) = byte_size;
7563 return set_die_type (die, type, cu);
7566 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
7567 the user defined type vector. */
7569 static struct type *
7570 read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
7573 struct type *to_type;
7574 struct type *domain;
7576 to_type = die_type (die, cu);
7577 domain = die_containing_type (die, cu);
7579 /* The calls above may have already set the type for this DIE. */
7580 type = get_die_type (die, cu);
7584 if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
7585 type = lookup_methodptr_type (to_type);
7587 type = lookup_memberptr_type (to_type, domain);
7589 return set_die_type (die, type, cu);
7592 /* Extract all information from a DW_TAG_reference_type DIE and add to
7593 the user defined type vector. */
7595 static struct type *
7596 read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
7598 struct comp_unit_head *cu_header = &cu->header;
7599 struct type *type, *target_type;
7600 struct attribute *attr;
7602 target_type = die_type (die, cu);
7604 /* The die_type call above may have already set the type for this DIE. */
7605 type = get_die_type (die, cu);
7609 type = lookup_reference_type (target_type);
7610 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7613 TYPE_LENGTH (type) = DW_UNSND (attr);
7617 TYPE_LENGTH (type) = cu_header->addr_size;
7619 return set_die_type (die, type, cu);
7622 static struct type *
7623 read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
7625 struct type *base_type, *cv_type;
7627 base_type = die_type (die, cu);
7629 /* The die_type call above may have already set the type for this DIE. */
7630 cv_type = get_die_type (die, cu);
7634 cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
7635 return set_die_type (die, cv_type, cu);
7638 static struct type *
7639 read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
7641 struct type *base_type, *cv_type;
7643 base_type = die_type (die, cu);
7645 /* The die_type call above may have already set the type for this DIE. */
7646 cv_type = get_die_type (die, cu);
7650 cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
7651 return set_die_type (die, cv_type, cu);
7654 /* Extract all information from a DW_TAG_string_type DIE and add to
7655 the user defined type vector. It isn't really a user defined type,
7656 but it behaves like one, with other DIE's using an AT_user_def_type
7657 attribute to reference it. */
7659 static struct type *
7660 read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
7662 struct objfile *objfile = cu->objfile;
7663 struct gdbarch *gdbarch = get_objfile_arch (objfile);
7664 struct type *type, *range_type, *index_type, *char_type;
7665 struct attribute *attr;
7666 unsigned int length;
7668 attr = dwarf2_attr (die, DW_AT_string_length, cu);
7671 length = DW_UNSND (attr);
7675 /* check for the DW_AT_byte_size attribute */
7676 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7679 length = DW_UNSND (attr);
7687 index_type = objfile_type (objfile)->builtin_int;
7688 range_type = create_range_type (NULL, index_type, 1, length);
7689 char_type = language_string_char_type (cu->language_defn, gdbarch);
7690 type = create_string_type (NULL, char_type, range_type);
7692 return set_die_type (die, type, cu);
7695 /* Handle DIES due to C code like:
7699 int (*funcp)(int a, long l);
7703 ('funcp' generates a DW_TAG_subroutine_type DIE)
7706 static struct type *
7707 read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
7709 struct type *type; /* Type that this function returns */
7710 struct type *ftype; /* Function that returns above type */
7711 struct attribute *attr;
7713 type = die_type (die, cu);
7715 /* The die_type call above may have already set the type for this DIE. */
7716 ftype = get_die_type (die, cu);
7720 ftype = lookup_function_type (type);
7722 /* All functions in C++, Pascal and Java have prototypes. */
7723 attr = dwarf2_attr (die, DW_AT_prototyped, cu);
7724 if ((attr && (DW_UNSND (attr) != 0))
7725 || cu->language == language_cplus
7726 || cu->language == language_java
7727 || cu->language == language_pascal)
7728 TYPE_PROTOTYPED (ftype) = 1;
7729 else if (producer_is_realview (cu->producer))
7730 /* RealView does not emit DW_AT_prototyped. We can not
7731 distinguish prototyped and unprototyped functions; default to
7732 prototyped, since that is more common in modern code (and
7733 RealView warns about unprototyped functions). */
7734 TYPE_PROTOTYPED (ftype) = 1;
7736 /* Store the calling convention in the type if it's available in
7737 the subroutine die. Otherwise set the calling convention to
7738 the default value DW_CC_normal. */
7739 attr = dwarf2_attr (die, DW_AT_calling_convention, cu);
7740 TYPE_CALLING_CONVENTION (ftype) = attr ? DW_UNSND (attr) : DW_CC_normal;
7742 /* We need to add the subroutine type to the die immediately so
7743 we don't infinitely recurse when dealing with parameters
7744 declared as the same subroutine type. */
7745 set_die_type (die, ftype, cu);
7747 if (die->child != NULL)
7749 struct type *void_type = objfile_type (cu->objfile)->builtin_void;
7750 struct die_info *child_die;
7751 int nparams, iparams;
7753 /* Count the number of parameters.
7754 FIXME: GDB currently ignores vararg functions, but knows about
7755 vararg member functions. */
7757 child_die = die->child;
7758 while (child_die && child_die->tag)
7760 if (child_die->tag == DW_TAG_formal_parameter)
7762 else if (child_die->tag == DW_TAG_unspecified_parameters)
7763 TYPE_VARARGS (ftype) = 1;
7764 child_die = sibling_die (child_die);
7767 /* Allocate storage for parameters and fill them in. */
7768 TYPE_NFIELDS (ftype) = nparams;
7769 TYPE_FIELDS (ftype) = (struct field *)
7770 TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
7772 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
7773 even if we error out during the parameters reading below. */
7774 for (iparams = 0; iparams < nparams; iparams++)
7775 TYPE_FIELD_TYPE (ftype, iparams) = void_type;
7778 child_die = die->child;
7779 while (child_die && child_die->tag)
7781 if (child_die->tag == DW_TAG_formal_parameter)
7783 struct type *arg_type;
7785 /* DWARF version 2 has no clean way to discern C++
7786 static and non-static member functions. G++ helps
7787 GDB by marking the first parameter for non-static
7788 member functions (which is the this pointer) as
7789 artificial. We pass this information to
7790 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
7792 DWARF version 3 added DW_AT_object_pointer, which GCC
7793 4.5 does not yet generate. */
7794 attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
7796 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
7799 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
7801 /* GCC/43521: In java, the formal parameter
7802 "this" is sometimes not marked with DW_AT_artificial. */
7803 if (cu->language == language_java)
7805 const char *name = dwarf2_name (child_die, cu);
7807 if (name && !strcmp (name, "this"))
7808 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1;
7811 arg_type = die_type (child_die, cu);
7813 /* RealView does not mark THIS as const, which the testsuite
7814 expects. GCC marks THIS as const in method definitions,
7815 but not in the class specifications (GCC PR 43053). */
7816 if (cu->language == language_cplus && !TYPE_CONST (arg_type)
7817 && TYPE_FIELD_ARTIFICIAL (ftype, iparams))
7820 struct dwarf2_cu *arg_cu = cu;
7821 const char *name = dwarf2_name (child_die, cu);
7823 attr = dwarf2_attr (die, DW_AT_object_pointer, cu);
7826 /* If the compiler emits this, use it. */
7827 if (follow_die_ref (die, attr, &arg_cu) == child_die)
7830 else if (name && strcmp (name, "this") == 0)
7831 /* Function definitions will have the argument names. */
7833 else if (name == NULL && iparams == 0)
7834 /* Declarations may not have the names, so like
7835 elsewhere in GDB, assume an artificial first
7836 argument is "this". */
7840 arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type),
7844 TYPE_FIELD_TYPE (ftype, iparams) = arg_type;
7847 child_die = sibling_die (child_die);
7854 static struct type *
7855 read_typedef (struct die_info *die, struct dwarf2_cu *cu)
7857 struct objfile *objfile = cu->objfile;
7858 const char *name = NULL;
7859 struct type *this_type;
7861 name = dwarf2_full_name (NULL, die, cu);
7862 this_type = init_type (TYPE_CODE_TYPEDEF, 0,
7863 TYPE_FLAG_TARGET_STUB, NULL, objfile);
7864 TYPE_NAME (this_type) = (char *) name;
7865 set_die_type (die, this_type, cu);
7866 TYPE_TARGET_TYPE (this_type) = die_type (die, cu);
7870 /* Find a representation of a given base type and install
7871 it in the TYPE field of the die. */
7873 static struct type *
7874 read_base_type (struct die_info *die, struct dwarf2_cu *cu)
7876 struct objfile *objfile = cu->objfile;
7878 struct attribute *attr;
7879 int encoding = 0, size = 0;
7881 enum type_code code = TYPE_CODE_INT;
7883 struct type *target_type = NULL;
7885 attr = dwarf2_attr (die, DW_AT_encoding, cu);
7888 encoding = DW_UNSND (attr);
7890 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7893 size = DW_UNSND (attr);
7895 name = dwarf2_name (die, cu);
7898 complaint (&symfile_complaints,
7899 _("DW_AT_name missing from DW_TAG_base_type"));
7904 case DW_ATE_address:
7905 /* Turn DW_ATE_address into a void * pointer. */
7906 code = TYPE_CODE_PTR;
7907 type_flags |= TYPE_FLAG_UNSIGNED;
7908 target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
7910 case DW_ATE_boolean:
7911 code = TYPE_CODE_BOOL;
7912 type_flags |= TYPE_FLAG_UNSIGNED;
7914 case DW_ATE_complex_float:
7915 code = TYPE_CODE_COMPLEX;
7916 target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
7918 case DW_ATE_decimal_float:
7919 code = TYPE_CODE_DECFLOAT;
7922 code = TYPE_CODE_FLT;
7926 case DW_ATE_unsigned:
7927 type_flags |= TYPE_FLAG_UNSIGNED;
7929 case DW_ATE_signed_char:
7930 if (cu->language == language_ada || cu->language == language_m2
7931 || cu->language == language_pascal)
7932 code = TYPE_CODE_CHAR;
7934 case DW_ATE_unsigned_char:
7935 if (cu->language == language_ada || cu->language == language_m2
7936 || cu->language == language_pascal)
7937 code = TYPE_CODE_CHAR;
7938 type_flags |= TYPE_FLAG_UNSIGNED;
7941 /* We just treat this as an integer and then recognize the
7942 type by name elsewhere. */
7946 complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
7947 dwarf_type_encoding_name (encoding));
7951 type = init_type (code, size, type_flags, NULL, objfile);
7952 TYPE_NAME (type) = name;
7953 TYPE_TARGET_TYPE (type) = target_type;
7955 if (name && strcmp (name, "char") == 0)
7956 TYPE_NOSIGN (type) = 1;
7958 return set_die_type (die, type, cu);
7961 /* Read the given DW_AT_subrange DIE. */
7963 static struct type *
7964 read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
7966 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
7967 struct type *base_type;
7968 struct type *range_type;
7969 struct attribute *attr;
7973 LONGEST negative_mask;
7975 base_type = die_type (die, cu);
7976 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
7977 check_typedef (base_type);
7979 /* The die_type call above may have already set the type for this DIE. */
7980 range_type = get_die_type (die, cu);
7984 if (cu->language == language_fortran)
7986 /* FORTRAN implies a lower bound of 1, if not given. */
7990 /* FIXME: For variable sized arrays either of these could be
7991 a variable rather than a constant value. We'll allow it,
7992 but we don't know how to handle it. */
7993 attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
7995 low = dwarf2_get_attr_constant_value (attr, 0);
7997 attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
8000 if (attr->form == DW_FORM_block1 || is_ref_attr (attr))
8002 /* GCC encodes arrays with unspecified or dynamic length
8003 with a DW_FORM_block1 attribute or a reference attribute.
8004 FIXME: GDB does not yet know how to handle dynamic
8005 arrays properly, treat them as arrays with unspecified
8008 FIXME: jimb/2003-09-22: GDB does not really know
8009 how to handle arrays of unspecified length
8010 either; we just represent them as zero-length
8011 arrays. Choose an appropriate upper bound given
8012 the lower bound we've computed above. */
8016 high = dwarf2_get_attr_constant_value (attr, 1);
8020 attr = dwarf2_attr (die, DW_AT_count, cu);
8023 int count = dwarf2_get_attr_constant_value (attr, 1);
8024 high = low + count - 1;
8028 /* Dwarf-2 specifications explicitly allows to create subrange types
8029 without specifying a base type.
8030 In that case, the base type must be set to the type of
8031 the lower bound, upper bound or count, in that order, if any of these
8032 three attributes references an object that has a type.
8033 If no base type is found, the Dwarf-2 specifications say that
8034 a signed integer type of size equal to the size of an address should
8036 For the following C code: `extern char gdb_int [];'
8037 GCC produces an empty range DIE.
8038 FIXME: muller/2010-05-28: Possible references to object for low bound,
8039 high bound or count are not yet handled by this code.
8041 if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
8043 struct objfile *objfile = cu->objfile;
8044 struct gdbarch *gdbarch = get_objfile_arch (objfile);
8045 int addr_size = gdbarch_addr_bit (gdbarch) /8;
8046 struct type *int_type = objfile_type (objfile)->builtin_int;
8048 /* Test "int", "long int", and "long long int" objfile types,
8049 and select the first one having a size above or equal to the
8050 architecture address size. */
8051 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
8052 base_type = int_type;
8055 int_type = objfile_type (objfile)->builtin_long;
8056 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
8057 base_type = int_type;
8060 int_type = objfile_type (objfile)->builtin_long_long;
8061 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
8062 base_type = int_type;
8068 (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1);
8069 if (!TYPE_UNSIGNED (base_type) && (low & negative_mask))
8070 low |= negative_mask;
8071 if (!TYPE_UNSIGNED (base_type) && (high & negative_mask))
8072 high |= negative_mask;
8074 range_type = create_range_type (NULL, base_type, low, high);
8076 /* Mark arrays with dynamic length at least as an array of unspecified
8077 length. GDB could check the boundary but before it gets implemented at
8078 least allow accessing the array elements. */
8079 if (attr && attr->form == DW_FORM_block1)
8080 TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1;
8082 name = dwarf2_name (die, cu);
8084 TYPE_NAME (range_type) = name;
8086 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
8088 TYPE_LENGTH (range_type) = DW_UNSND (attr);
8090 set_die_type (die, range_type, cu);
8092 /* set_die_type should be already done. */
8093 set_descriptive_type (range_type, die, cu);
8098 static struct type *
8099 read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
8103 /* For now, we only support the C meaning of an unspecified type: void. */
8105 type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile);
8106 TYPE_NAME (type) = dwarf2_name (die, cu);
8108 return set_die_type (die, type, cu);
8111 /* Trivial hash function for die_info: the hash value of a DIE
8112 is its offset in .debug_info for this objfile. */
8115 die_hash (const void *item)
8117 const struct die_info *die = item;
8122 /* Trivial comparison function for die_info structures: two DIEs
8123 are equal if they have the same offset. */
8126 die_eq (const void *item_lhs, const void *item_rhs)
8128 const struct die_info *die_lhs = item_lhs;
8129 const struct die_info *die_rhs = item_rhs;
8131 return die_lhs->offset == die_rhs->offset;
8134 /* Read a whole compilation unit into a linked list of dies. */
8136 static struct die_info *
8137 read_comp_unit (gdb_byte *info_ptr, struct dwarf2_cu *cu)
8139 struct die_reader_specs reader_specs;
8140 int read_abbrevs = 0;
8141 struct cleanup *back_to = NULL;
8142 struct die_info *die;
8144 if (cu->dwarf2_abbrevs == NULL)
8146 dwarf2_read_abbrevs (cu->objfile->obfd, cu);
8147 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
8151 gdb_assert (cu->die_hash == NULL);
8153 = htab_create_alloc_ex (cu->header.length / 12,
8157 &cu->comp_unit_obstack,
8158 hashtab_obstack_allocate,
8159 dummy_obstack_deallocate);
8161 init_cu_die_reader (&reader_specs, cu);
8163 die = read_die_and_children (&reader_specs, info_ptr, &info_ptr, NULL);
8166 do_cleanups (back_to);
8171 /* Main entry point for reading a DIE and all children.
8172 Read the DIE and dump it if requested. */
8174 static struct die_info *
8175 read_die_and_children (const struct die_reader_specs *reader,
8177 gdb_byte **new_info_ptr,
8178 struct die_info *parent)
8180 struct die_info *result = read_die_and_children_1 (reader, info_ptr,
8181 new_info_ptr, parent);
8183 if (dwarf2_die_debug)
8185 fprintf_unfiltered (gdb_stdlog,
8186 "\nRead die from %s of %s:\n",
8187 reader->buffer == dwarf2_per_objfile->info.buffer
8189 : reader->buffer == dwarf2_per_objfile->types.buffer
8191 : "unknown section",
8192 reader->abfd->filename);
8193 dump_die (result, dwarf2_die_debug);
8199 /* Read a single die and all its descendents. Set the die's sibling
8200 field to NULL; set other fields in the die correctly, and set all
8201 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
8202 location of the info_ptr after reading all of those dies. PARENT
8203 is the parent of the die in question. */
8205 static struct die_info *
8206 read_die_and_children_1 (const struct die_reader_specs *reader,
8208 gdb_byte **new_info_ptr,
8209 struct die_info *parent)
8211 struct die_info *die;
8215 cur_ptr = read_full_die (reader, &die, info_ptr, &has_children);
8218 *new_info_ptr = cur_ptr;
8221 store_in_ref_table (die, reader->cu);
8224 die->child = read_die_and_siblings (reader, cur_ptr, new_info_ptr, die);
8228 *new_info_ptr = cur_ptr;
8231 die->sibling = NULL;
8232 die->parent = parent;
8236 /* Read a die, all of its descendents, and all of its siblings; set
8237 all of the fields of all of the dies correctly. Arguments are as
8238 in read_die_and_children. */
8240 static struct die_info *
8241 read_die_and_siblings (const struct die_reader_specs *reader,
8243 gdb_byte **new_info_ptr,
8244 struct die_info *parent)
8246 struct die_info *first_die, *last_sibling;
8250 first_die = last_sibling = NULL;
8254 struct die_info *die
8255 = read_die_and_children_1 (reader, cur_ptr, &cur_ptr, parent);
8259 *new_info_ptr = cur_ptr;
8266 last_sibling->sibling = die;
8272 /* Read the die from the .debug_info section buffer. Set DIEP to
8273 point to a newly allocated die with its information, except for its
8274 child, sibling, and parent fields. Set HAS_CHILDREN to tell
8275 whether the die has children or not. */
8278 read_full_die (const struct die_reader_specs *reader,
8279 struct die_info **diep, gdb_byte *info_ptr,
8282 unsigned int abbrev_number, bytes_read, i, offset;
8283 struct abbrev_info *abbrev;
8284 struct die_info *die;
8285 struct dwarf2_cu *cu = reader->cu;
8286 bfd *abfd = reader->abfd;
8288 offset = info_ptr - reader->buffer;
8289 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
8290 info_ptr += bytes_read;
8298 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
8300 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
8302 bfd_get_filename (abfd));
8304 die = dwarf_alloc_die (cu, abbrev->num_attrs);
8305 die->offset = offset;
8306 die->tag = abbrev->tag;
8307 die->abbrev = abbrev_number;
8309 die->num_attrs = abbrev->num_attrs;
8311 for (i = 0; i < abbrev->num_attrs; ++i)
8312 info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
8313 abfd, info_ptr, cu);
8316 *has_children = abbrev->has_children;
8320 /* In DWARF version 2, the description of the debugging information is
8321 stored in a separate .debug_abbrev section. Before we read any
8322 dies from a section we read in all abbreviations and install them
8323 in a hash table. This function also sets flags in CU describing
8324 the data found in the abbrev table. */
8327 dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu)
8329 struct comp_unit_head *cu_header = &cu->header;
8330 gdb_byte *abbrev_ptr;
8331 struct abbrev_info *cur_abbrev;
8332 unsigned int abbrev_number, bytes_read, abbrev_name;
8333 unsigned int abbrev_form, hash_number;
8334 struct attr_abbrev *cur_attrs;
8335 unsigned int allocated_attrs;
8337 /* Initialize dwarf2 abbrevs */
8338 obstack_init (&cu->abbrev_obstack);
8339 cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack,
8341 * sizeof (struct abbrev_info *)));
8342 memset (cu->dwarf2_abbrevs, 0,
8343 ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
8345 dwarf2_read_section (dwarf2_per_objfile->objfile,
8346 &dwarf2_per_objfile->abbrev);
8347 abbrev_ptr = dwarf2_per_objfile->abbrev.buffer + cu_header->abbrev_offset;
8348 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8349 abbrev_ptr += bytes_read;
8351 allocated_attrs = ATTR_ALLOC_CHUNK;
8352 cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
8354 /* loop until we reach an abbrev number of 0 */
8355 while (abbrev_number)
8357 cur_abbrev = dwarf_alloc_abbrev (cu);
8359 /* read in abbrev header */
8360 cur_abbrev->number = abbrev_number;
8361 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8362 abbrev_ptr += bytes_read;
8363 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
8366 if (cur_abbrev->tag == DW_TAG_namespace)
8367 cu->has_namespace_info = 1;
8369 /* now read in declarations */
8370 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8371 abbrev_ptr += bytes_read;
8372 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8373 abbrev_ptr += bytes_read;
8376 if (cur_abbrev->num_attrs == allocated_attrs)
8378 allocated_attrs += ATTR_ALLOC_CHUNK;
8380 = xrealloc (cur_attrs, (allocated_attrs
8381 * sizeof (struct attr_abbrev)));
8384 /* Record whether this compilation unit might have
8385 inter-compilation-unit references. If we don't know what form
8386 this attribute will have, then it might potentially be a
8387 DW_FORM_ref_addr, so we conservatively expect inter-CU
8390 if (abbrev_form == DW_FORM_ref_addr
8391 || abbrev_form == DW_FORM_indirect)
8392 cu->has_form_ref_addr = 1;
8394 cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
8395 cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
8396 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8397 abbrev_ptr += bytes_read;
8398 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8399 abbrev_ptr += bytes_read;
8402 cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack,
8403 (cur_abbrev->num_attrs
8404 * sizeof (struct attr_abbrev)));
8405 memcpy (cur_abbrev->attrs, cur_attrs,
8406 cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
8408 hash_number = abbrev_number % ABBREV_HASH_SIZE;
8409 cur_abbrev->next = cu->dwarf2_abbrevs[hash_number];
8410 cu->dwarf2_abbrevs[hash_number] = cur_abbrev;
8412 /* Get next abbreviation.
8413 Under Irix6 the abbreviations for a compilation unit are not
8414 always properly terminated with an abbrev number of 0.
8415 Exit loop if we encounter an abbreviation which we have
8416 already read (which means we are about to read the abbreviations
8417 for the next compile unit) or if the end of the abbreviation
8418 table is reached. */
8419 if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev.buffer)
8420 >= dwarf2_per_objfile->abbrev.size)
8422 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8423 abbrev_ptr += bytes_read;
8424 if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL)
8431 /* Release the memory used by the abbrev table for a compilation unit. */
8434 dwarf2_free_abbrev_table (void *ptr_to_cu)
8436 struct dwarf2_cu *cu = ptr_to_cu;
8438 obstack_free (&cu->abbrev_obstack, NULL);
8439 cu->dwarf2_abbrevs = NULL;
8442 /* Lookup an abbrev_info structure in the abbrev hash table. */
8444 static struct abbrev_info *
8445 dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu)
8447 unsigned int hash_number;
8448 struct abbrev_info *abbrev;
8450 hash_number = number % ABBREV_HASH_SIZE;
8451 abbrev = cu->dwarf2_abbrevs[hash_number];
8455 if (abbrev->number == number)
8458 abbrev = abbrev->next;
8463 /* Returns nonzero if TAG represents a type that we might generate a partial
8467 is_type_tag_for_partial (int tag)
8472 /* Some types that would be reasonable to generate partial symbols for,
8473 that we don't at present. */
8474 case DW_TAG_array_type:
8475 case DW_TAG_file_type:
8476 case DW_TAG_ptr_to_member_type:
8477 case DW_TAG_set_type:
8478 case DW_TAG_string_type:
8479 case DW_TAG_subroutine_type:
8481 case DW_TAG_base_type:
8482 case DW_TAG_class_type:
8483 case DW_TAG_interface_type:
8484 case DW_TAG_enumeration_type:
8485 case DW_TAG_structure_type:
8486 case DW_TAG_subrange_type:
8487 case DW_TAG_typedef:
8488 case DW_TAG_union_type:
8495 /* Load all DIEs that are interesting for partial symbols into memory. */
8497 static struct partial_die_info *
8498 load_partial_dies (bfd *abfd, gdb_byte *buffer, gdb_byte *info_ptr,
8499 int building_psymtab, struct dwarf2_cu *cu)
8501 struct partial_die_info *part_die;
8502 struct partial_die_info *parent_die, *last_die, *first_die = NULL;
8503 struct abbrev_info *abbrev;
8504 unsigned int bytes_read;
8505 unsigned int load_all = 0;
8507 int nesting_level = 1;
8512 if (cu->per_cu && cu->per_cu->load_all_dies)
8516 = htab_create_alloc_ex (cu->header.length / 12,
8520 &cu->comp_unit_obstack,
8521 hashtab_obstack_allocate,
8522 dummy_obstack_deallocate);
8524 part_die = obstack_alloc (&cu->comp_unit_obstack,
8525 sizeof (struct partial_die_info));
8529 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
8531 /* A NULL abbrev means the end of a series of children. */
8534 if (--nesting_level == 0)
8536 /* PART_DIE was probably the last thing allocated on the
8537 comp_unit_obstack, so we could call obstack_free
8538 here. We don't do that because the waste is small,
8539 and will be cleaned up when we're done with this
8540 compilation unit. This way, we're also more robust
8541 against other users of the comp_unit_obstack. */
8544 info_ptr += bytes_read;
8545 last_die = parent_die;
8546 parent_die = parent_die->die_parent;
8550 /* Check for template arguments. We never save these; if
8551 they're seen, we just mark the parent, and go on our way. */
8552 if (parent_die != NULL
8553 && cu->language == language_cplus
8554 && (abbrev->tag == DW_TAG_template_type_param
8555 || abbrev->tag == DW_TAG_template_value_param))
8557 parent_die->has_template_arguments = 1;
8561 /* We don't need a partial DIE for the template argument. */
8562 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev,
8568 /* We only recurse into subprograms looking for template arguments.
8569 Skip their other children. */
8571 && cu->language == language_cplus
8572 && parent_die != NULL
8573 && parent_die->tag == DW_TAG_subprogram)
8575 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
8579 /* Check whether this DIE is interesting enough to save. Normally
8580 we would not be interested in members here, but there may be
8581 later variables referencing them via DW_AT_specification (for
8584 && !is_type_tag_for_partial (abbrev->tag)
8585 && abbrev->tag != DW_TAG_constant
8586 && abbrev->tag != DW_TAG_enumerator
8587 && abbrev->tag != DW_TAG_subprogram
8588 && abbrev->tag != DW_TAG_lexical_block
8589 && abbrev->tag != DW_TAG_variable
8590 && abbrev->tag != DW_TAG_namespace
8591 && abbrev->tag != DW_TAG_module
8592 && abbrev->tag != DW_TAG_member)
8594 /* Otherwise we skip to the next sibling, if any. */
8595 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
8599 info_ptr = read_partial_die (part_die, abbrev, bytes_read, abfd,
8600 buffer, info_ptr, cu);
8602 /* This two-pass algorithm for processing partial symbols has a
8603 high cost in cache pressure. Thus, handle some simple cases
8604 here which cover the majority of C partial symbols. DIEs
8605 which neither have specification tags in them, nor could have
8606 specification tags elsewhere pointing at them, can simply be
8607 processed and discarded.
8609 This segment is also optional; scan_partial_symbols and
8610 add_partial_symbol will handle these DIEs if we chain
8611 them in normally. When compilers which do not emit large
8612 quantities of duplicate debug information are more common,
8613 this code can probably be removed. */
8615 /* Any complete simple types at the top level (pretty much all
8616 of them, for a language without namespaces), can be processed
8618 if (parent_die == NULL
8619 && part_die->has_specification == 0
8620 && part_die->is_declaration == 0
8621 && (part_die->tag == DW_TAG_typedef
8622 || part_die->tag == DW_TAG_base_type
8623 || part_die->tag == DW_TAG_subrange_type))
8625 if (building_psymtab && part_die->name != NULL)
8626 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
8627 VAR_DOMAIN, LOC_TYPEDEF,
8628 &cu->objfile->static_psymbols,
8629 0, (CORE_ADDR) 0, cu->language, cu->objfile);
8630 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
8634 /* If we're at the second level, and we're an enumerator, and
8635 our parent has no specification (meaning possibly lives in a
8636 namespace elsewhere), then we can add the partial symbol now
8637 instead of queueing it. */
8638 if (part_die->tag == DW_TAG_enumerator
8639 && parent_die != NULL
8640 && parent_die->die_parent == NULL
8641 && parent_die->tag == DW_TAG_enumeration_type
8642 && parent_die->has_specification == 0)
8644 if (part_die->name == NULL)
8645 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
8646 else if (building_psymtab)
8647 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
8648 VAR_DOMAIN, LOC_CONST,
8649 (cu->language == language_cplus
8650 || cu->language == language_java)
8651 ? &cu->objfile->global_psymbols
8652 : &cu->objfile->static_psymbols,
8653 0, (CORE_ADDR) 0, cu->language, cu->objfile);
8655 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
8659 /* We'll save this DIE so link it in. */
8660 part_die->die_parent = parent_die;
8661 part_die->die_sibling = NULL;
8662 part_die->die_child = NULL;
8664 if (last_die && last_die == parent_die)
8665 last_die->die_child = part_die;
8667 last_die->die_sibling = part_die;
8669 last_die = part_die;
8671 if (first_die == NULL)
8672 first_die = part_die;
8674 /* Maybe add the DIE to the hash table. Not all DIEs that we
8675 find interesting need to be in the hash table, because we
8676 also have the parent/sibling/child chains; only those that we
8677 might refer to by offset later during partial symbol reading.
8679 For now this means things that might have be the target of a
8680 DW_AT_specification, DW_AT_abstract_origin, or
8681 DW_AT_extension. DW_AT_extension will refer only to
8682 namespaces; DW_AT_abstract_origin refers to functions (and
8683 many things under the function DIE, but we do not recurse
8684 into function DIEs during partial symbol reading) and
8685 possibly variables as well; DW_AT_specification refers to
8686 declarations. Declarations ought to have the DW_AT_declaration
8687 flag. It happens that GCC forgets to put it in sometimes, but
8688 only for functions, not for types.
8690 Adding more things than necessary to the hash table is harmless
8691 except for the performance cost. Adding too few will result in
8692 wasted time in find_partial_die, when we reread the compilation
8693 unit with load_all_dies set. */
8696 || abbrev->tag == DW_TAG_constant
8697 || abbrev->tag == DW_TAG_subprogram
8698 || abbrev->tag == DW_TAG_variable
8699 || abbrev->tag == DW_TAG_namespace
8700 || part_die->is_declaration)
8704 slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
8705 part_die->offset, INSERT);
8709 part_die = obstack_alloc (&cu->comp_unit_obstack,
8710 sizeof (struct partial_die_info));
8712 /* For some DIEs we want to follow their children (if any). For C
8713 we have no reason to follow the children of structures; for other
8714 languages we have to, so that we can get at method physnames
8715 to infer fully qualified class names, for DW_AT_specification,
8716 and for C++ template arguments. For C++, we also look one level
8717 inside functions to find template arguments (if the name of the
8718 function does not already contain the template arguments).
8720 For Ada, we need to scan the children of subprograms and lexical
8721 blocks as well because Ada allows the definition of nested
8722 entities that could be interesting for the debugger, such as
8723 nested subprograms for instance. */
8724 if (last_die->has_children
8726 || last_die->tag == DW_TAG_namespace
8727 || last_die->tag == DW_TAG_module
8728 || last_die->tag == DW_TAG_enumeration_type
8729 || (cu->language == language_cplus
8730 && last_die->tag == DW_TAG_subprogram
8731 && (last_die->name == NULL
8732 || strchr (last_die->name, '<') == NULL))
8733 || (cu->language != language_c
8734 && (last_die->tag == DW_TAG_class_type
8735 || last_die->tag == DW_TAG_interface_type
8736 || last_die->tag == DW_TAG_structure_type
8737 || last_die->tag == DW_TAG_union_type))
8738 || (cu->language == language_ada
8739 && (last_die->tag == DW_TAG_subprogram
8740 || last_die->tag == DW_TAG_lexical_block))))
8743 parent_die = last_die;
8747 /* Otherwise we skip to the next sibling, if any. */
8748 info_ptr = locate_pdi_sibling (last_die, buffer, info_ptr, abfd, cu);
8750 /* Back to the top, do it again. */
8754 /* Read a minimal amount of information into the minimal die structure. */
8757 read_partial_die (struct partial_die_info *part_die,
8758 struct abbrev_info *abbrev,
8759 unsigned int abbrev_len, bfd *abfd,
8760 gdb_byte *buffer, gdb_byte *info_ptr,
8761 struct dwarf2_cu *cu)
8764 struct attribute attr;
8765 int has_low_pc_attr = 0;
8766 int has_high_pc_attr = 0;
8768 memset (part_die, 0, sizeof (struct partial_die_info));
8770 part_die->offset = info_ptr - buffer;
8772 info_ptr += abbrev_len;
8777 part_die->tag = abbrev->tag;
8778 part_die->has_children = abbrev->has_children;
8780 for (i = 0; i < abbrev->num_attrs; ++i)
8782 info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu);
8784 /* Store the data if it is of an attribute we want to keep in a
8785 partial symbol table. */
8789 switch (part_die->tag)
8791 case DW_TAG_compile_unit:
8792 case DW_TAG_type_unit:
8793 /* Compilation units have a DW_AT_name that is a filename, not
8794 a source language identifier. */
8795 case DW_TAG_enumeration_type:
8796 case DW_TAG_enumerator:
8797 /* These tags always have simple identifiers already; no need
8798 to canonicalize them. */
8799 part_die->name = DW_STRING (&attr);
8803 = dwarf2_canonicalize_name (DW_STRING (&attr), cu,
8804 &cu->objfile->objfile_obstack);
8808 case DW_AT_linkage_name:
8809 case DW_AT_MIPS_linkage_name:
8810 /* Note that both forms of linkage name might appear. We
8811 assume they will be the same, and we only store the last
8813 if (cu->language == language_ada)
8814 part_die->name = DW_STRING (&attr);
8817 has_low_pc_attr = 1;
8818 part_die->lowpc = DW_ADDR (&attr);
8821 has_high_pc_attr = 1;
8822 part_die->highpc = DW_ADDR (&attr);
8824 case DW_AT_location:
8825 /* Support the .debug_loc offsets */
8826 if (attr_form_is_block (&attr))
8828 part_die->locdesc = DW_BLOCK (&attr);
8830 else if (attr_form_is_section_offset (&attr))
8832 dwarf2_complex_location_expr_complaint ();
8836 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
8837 "partial symbol information");
8840 case DW_AT_external:
8841 part_die->is_external = DW_UNSND (&attr);
8843 case DW_AT_declaration:
8844 part_die->is_declaration = DW_UNSND (&attr);
8847 part_die->has_type = 1;
8849 case DW_AT_abstract_origin:
8850 case DW_AT_specification:
8851 case DW_AT_extension:
8852 part_die->has_specification = 1;
8853 part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
8856 /* Ignore absolute siblings, they might point outside of
8857 the current compile unit. */
8858 if (attr.form == DW_FORM_ref_addr)
8859 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
8861 part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr);
8863 case DW_AT_byte_size:
8864 part_die->has_byte_size = 1;
8866 case DW_AT_calling_convention:
8867 /* DWARF doesn't provide a way to identify a program's source-level
8868 entry point. DW_AT_calling_convention attributes are only meant
8869 to describe functions' calling conventions.
8871 However, because it's a necessary piece of information in
8872 Fortran, and because DW_CC_program is the only piece of debugging
8873 information whose definition refers to a 'main program' at all,
8874 several compilers have begun marking Fortran main programs with
8875 DW_CC_program --- even when those functions use the standard
8876 calling conventions.
8878 So until DWARF specifies a way to provide this information and
8879 compilers pick up the new representation, we'll support this
8881 if (DW_UNSND (&attr) == DW_CC_program
8882 && cu->language == language_fortran)
8883 set_main_name (part_die->name);
8890 /* When using the GNU linker, .gnu.linkonce. sections are used to
8891 eliminate duplicate copies of functions and vtables and such.
8892 The linker will arbitrarily choose one and discard the others.
8893 The AT_*_pc values for such functions refer to local labels in
8894 these sections. If the section from that file was discarded, the
8895 labels are not in the output, so the relocs get a value of 0.
8896 If this is a discarded function, mark the pc bounds as invalid,
8897 so that GDB will ignore it. */
8898 if (has_low_pc_attr && has_high_pc_attr
8899 && part_die->lowpc < part_die->highpc
8900 && (part_die->lowpc != 0
8901 || dwarf2_per_objfile->has_section_at_zero))
8902 part_die->has_pc_info = 1;
8907 /* Find a cached partial DIE at OFFSET in CU. */
8909 static struct partial_die_info *
8910 find_partial_die_in_comp_unit (unsigned int offset, struct dwarf2_cu *cu)
8912 struct partial_die_info *lookup_die = NULL;
8913 struct partial_die_info part_die;
8915 part_die.offset = offset;
8916 lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset);
8921 /* Find a partial DIE at OFFSET, which may or may not be in CU,
8922 except in the case of .debug_types DIEs which do not reference
8923 outside their CU (they do however referencing other types via
8926 static struct partial_die_info *
8927 find_partial_die (unsigned int offset, struct dwarf2_cu *cu)
8929 struct dwarf2_per_cu_data *per_cu = NULL;
8930 struct partial_die_info *pd = NULL;
8932 if (cu->per_cu->from_debug_types)
8934 pd = find_partial_die_in_comp_unit (offset, cu);
8940 if (offset_in_cu_p (&cu->header, offset))
8942 pd = find_partial_die_in_comp_unit (offset, cu);
8947 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
8949 if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL)
8950 load_partial_comp_unit (per_cu, cu->objfile);
8952 per_cu->cu->last_used = 0;
8953 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
8955 if (pd == NULL && per_cu->load_all_dies == 0)
8957 struct cleanup *back_to;
8958 struct partial_die_info comp_unit_die;
8959 struct abbrev_info *abbrev;
8960 unsigned int bytes_read;
8963 per_cu->load_all_dies = 1;
8965 /* Re-read the DIEs. */
8966 back_to = make_cleanup (null_cleanup, 0);
8967 if (per_cu->cu->dwarf2_abbrevs == NULL)
8969 dwarf2_read_abbrevs (per_cu->cu->objfile->obfd, per_cu->cu);
8970 make_cleanup (dwarf2_free_abbrev_table, per_cu->cu);
8972 info_ptr = (dwarf2_per_objfile->info.buffer
8973 + per_cu->cu->header.offset
8974 + per_cu->cu->header.first_die_offset);
8975 abbrev = peek_die_abbrev (info_ptr, &bytes_read, per_cu->cu);
8976 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
8977 per_cu->cu->objfile->obfd,
8978 dwarf2_per_objfile->info.buffer, info_ptr,
8980 if (comp_unit_die.has_children)
8981 load_partial_dies (per_cu->cu->objfile->obfd,
8982 dwarf2_per_objfile->info.buffer, info_ptr,
8984 do_cleanups (back_to);
8986 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
8992 internal_error (__FILE__, __LINE__,
8993 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
8994 offset, bfd_get_filename (cu->objfile->obfd));
8998 /* Adjust PART_DIE before generating a symbol for it. This function
8999 may set the is_external flag or change the DIE's name. */
9002 fixup_partial_die (struct partial_die_info *part_die,
9003 struct dwarf2_cu *cu)
9005 /* If we found a reference attribute and the DIE has no name, try
9006 to find a name in the referred to DIE. */
9008 if (part_die->name == NULL && part_die->has_specification)
9010 struct partial_die_info *spec_die;
9012 spec_die = find_partial_die (part_die->spec_offset, cu);
9014 fixup_partial_die (spec_die, cu);
9018 part_die->name = spec_die->name;
9020 /* Copy DW_AT_external attribute if it is set. */
9021 if (spec_die->is_external)
9022 part_die->is_external = spec_die->is_external;
9026 /* Set default names for some unnamed DIEs. */
9028 if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
9029 part_die->name = "(anonymous namespace)";
9031 if (part_die->tag == DW_TAG_structure_type
9032 || part_die->tag == DW_TAG_class_type
9033 || part_die->tag == DW_TAG_union_type)
9034 guess_structure_name (part_die, cu);
9037 /* Read an attribute value described by an attribute form. */
9040 read_attribute_value (struct attribute *attr, unsigned form,
9041 bfd *abfd, gdb_byte *info_ptr,
9042 struct dwarf2_cu *cu)
9044 struct comp_unit_head *cu_header = &cu->header;
9045 unsigned int bytes_read;
9046 struct dwarf_block *blk;
9051 case DW_FORM_ref_addr:
9052 if (cu->header.version == 2)
9053 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
9055 DW_ADDR (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
9056 info_ptr += bytes_read;
9059 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
9060 info_ptr += bytes_read;
9062 case DW_FORM_block2:
9063 blk = dwarf_alloc_block (cu);
9064 blk->size = read_2_bytes (abfd, info_ptr);
9066 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
9067 info_ptr += blk->size;
9068 DW_BLOCK (attr) = blk;
9070 case DW_FORM_block4:
9071 blk = dwarf_alloc_block (cu);
9072 blk->size = read_4_bytes (abfd, info_ptr);
9074 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
9075 info_ptr += blk->size;
9076 DW_BLOCK (attr) = blk;
9079 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
9083 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
9087 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
9090 case DW_FORM_sec_offset:
9091 DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
9092 info_ptr += bytes_read;
9094 case DW_FORM_string:
9095 DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read);
9096 DW_STRING_IS_CANONICAL (attr) = 0;
9097 info_ptr += bytes_read;
9100 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
9102 DW_STRING_IS_CANONICAL (attr) = 0;
9103 info_ptr += bytes_read;
9105 case DW_FORM_exprloc:
9107 blk = dwarf_alloc_block (cu);
9108 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
9109 info_ptr += bytes_read;
9110 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
9111 info_ptr += blk->size;
9112 DW_BLOCK (attr) = blk;
9114 case DW_FORM_block1:
9115 blk = dwarf_alloc_block (cu);
9116 blk->size = read_1_byte (abfd, info_ptr);
9118 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
9119 info_ptr += blk->size;
9120 DW_BLOCK (attr) = blk;
9123 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
9127 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
9130 case DW_FORM_flag_present:
9131 DW_UNSND (attr) = 1;
9134 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
9135 info_ptr += bytes_read;
9138 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
9139 info_ptr += bytes_read;
9142 DW_ADDR (attr) = cu->header.offset + read_1_byte (abfd, info_ptr);
9146 DW_ADDR (attr) = cu->header.offset + read_2_bytes (abfd, info_ptr);
9150 DW_ADDR (attr) = cu->header.offset + read_4_bytes (abfd, info_ptr);
9154 DW_ADDR (attr) = cu->header.offset + read_8_bytes (abfd, info_ptr);
9158 /* Convert the signature to something we can record in DW_UNSND
9160 NOTE: This is NULL if the type wasn't found. */
9161 DW_SIGNATURED_TYPE (attr) =
9162 lookup_signatured_type (cu->objfile, read_8_bytes (abfd, info_ptr));
9165 case DW_FORM_ref_udata:
9166 DW_ADDR (attr) = (cu->header.offset
9167 + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
9168 info_ptr += bytes_read;
9170 case DW_FORM_indirect:
9171 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
9172 info_ptr += bytes_read;
9173 info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu);
9176 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
9177 dwarf_form_name (form),
9178 bfd_get_filename (abfd));
9181 /* We have seen instances where the compiler tried to emit a byte
9182 size attribute of -1 which ended up being encoded as an unsigned
9183 0xffffffff. Although 0xffffffff is technically a valid size value,
9184 an object of this size seems pretty unlikely so we can relatively
9185 safely treat these cases as if the size attribute was invalid and
9186 treat them as zero by default. */
9187 if (attr->name == DW_AT_byte_size
9188 && form == DW_FORM_data4
9189 && DW_UNSND (attr) >= 0xffffffff)
9192 (&symfile_complaints,
9193 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
9194 hex_string (DW_UNSND (attr)));
9195 DW_UNSND (attr) = 0;
9201 /* Read an attribute described by an abbreviated attribute. */
9204 read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
9205 bfd *abfd, gdb_byte *info_ptr, struct dwarf2_cu *cu)
9207 attr->name = abbrev->name;
9208 return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu);
9211 /* read dwarf information from a buffer */
9214 read_1_byte (bfd *abfd, gdb_byte *buf)
9216 return bfd_get_8 (abfd, buf);
9220 read_1_signed_byte (bfd *abfd, gdb_byte *buf)
9222 return bfd_get_signed_8 (abfd, buf);
9226 read_2_bytes (bfd *abfd, gdb_byte *buf)
9228 return bfd_get_16 (abfd, buf);
9232 read_2_signed_bytes (bfd *abfd, gdb_byte *buf)
9234 return bfd_get_signed_16 (abfd, buf);
9238 read_4_bytes (bfd *abfd, gdb_byte *buf)
9240 return bfd_get_32 (abfd, buf);
9244 read_4_signed_bytes (bfd *abfd, gdb_byte *buf)
9246 return bfd_get_signed_32 (abfd, buf);
9250 read_8_bytes (bfd *abfd, gdb_byte *buf)
9252 return bfd_get_64 (abfd, buf);
9256 read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
9257 unsigned int *bytes_read)
9259 struct comp_unit_head *cu_header = &cu->header;
9260 CORE_ADDR retval = 0;
9262 if (cu_header->signed_addr_p)
9264 switch (cu_header->addr_size)
9267 retval = bfd_get_signed_16 (abfd, buf);
9270 retval = bfd_get_signed_32 (abfd, buf);
9273 retval = bfd_get_signed_64 (abfd, buf);
9276 internal_error (__FILE__, __LINE__,
9277 _("read_address: bad switch, signed [in module %s]"),
9278 bfd_get_filename (abfd));
9283 switch (cu_header->addr_size)
9286 retval = bfd_get_16 (abfd, buf);
9289 retval = bfd_get_32 (abfd, buf);
9292 retval = bfd_get_64 (abfd, buf);
9295 internal_error (__FILE__, __LINE__,
9296 _("read_address: bad switch, unsigned [in module %s]"),
9297 bfd_get_filename (abfd));
9301 *bytes_read = cu_header->addr_size;
9305 /* Read the initial length from a section. The (draft) DWARF 3
9306 specification allows the initial length to take up either 4 bytes
9307 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
9308 bytes describe the length and all offsets will be 8 bytes in length
9311 An older, non-standard 64-bit format is also handled by this
9312 function. The older format in question stores the initial length
9313 as an 8-byte quantity without an escape value. Lengths greater
9314 than 2^32 aren't very common which means that the initial 4 bytes
9315 is almost always zero. Since a length value of zero doesn't make
9316 sense for the 32-bit format, this initial zero can be considered to
9317 be an escape value which indicates the presence of the older 64-bit
9318 format. As written, the code can't detect (old format) lengths
9319 greater than 4GB. If it becomes necessary to handle lengths
9320 somewhat larger than 4GB, we could allow other small values (such
9321 as the non-sensical values of 1, 2, and 3) to also be used as
9322 escape values indicating the presence of the old format.
9324 The value returned via bytes_read should be used to increment the
9325 relevant pointer after calling read_initial_length().
9327 [ Note: read_initial_length() and read_offset() are based on the
9328 document entitled "DWARF Debugging Information Format", revision
9329 3, draft 8, dated November 19, 2001. This document was obtained
9332 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
9334 This document is only a draft and is subject to change. (So beware.)
9336 Details regarding the older, non-standard 64-bit format were
9337 determined empirically by examining 64-bit ELF files produced by
9338 the SGI toolchain on an IRIX 6.5 machine.
9340 - Kevin, July 16, 2002
9344 read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read)
9346 LONGEST length = bfd_get_32 (abfd, buf);
9348 if (length == 0xffffffff)
9350 length = bfd_get_64 (abfd, buf + 4);
9353 else if (length == 0)
9355 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
9356 length = bfd_get_64 (abfd, buf);
9367 /* Cover function for read_initial_length.
9368 Returns the length of the object at BUF, and stores the size of the
9369 initial length in *BYTES_READ and stores the size that offsets will be in
9371 If the initial length size is not equivalent to that specified in
9372 CU_HEADER then issue a complaint.
9373 This is useful when reading non-comp-unit headers. */
9376 read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf,
9377 const struct comp_unit_head *cu_header,
9378 unsigned int *bytes_read,
9379 unsigned int *offset_size)
9381 LONGEST length = read_initial_length (abfd, buf, bytes_read);
9383 gdb_assert (cu_header->initial_length_size == 4
9384 || cu_header->initial_length_size == 8
9385 || cu_header->initial_length_size == 12);
9387 if (cu_header->initial_length_size != *bytes_read)
9388 complaint (&symfile_complaints,
9389 _("intermixed 32-bit and 64-bit DWARF sections"));
9391 *offset_size = (*bytes_read == 4) ? 4 : 8;
9395 /* Read an offset from the data stream. The size of the offset is
9396 given by cu_header->offset_size. */
9399 read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
9400 unsigned int *bytes_read)
9402 LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size);
9404 *bytes_read = cu_header->offset_size;
9408 /* Read an offset from the data stream. */
9411 read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size)
9415 switch (offset_size)
9418 retval = bfd_get_32 (abfd, buf);
9421 retval = bfd_get_64 (abfd, buf);
9424 internal_error (__FILE__, __LINE__,
9425 _("read_offset_1: bad switch [in module %s]"),
9426 bfd_get_filename (abfd));
9433 read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
9435 /* If the size of a host char is 8 bits, we can return a pointer
9436 to the buffer, otherwise we have to copy the data to a buffer
9437 allocated on the temporary obstack. */
9438 gdb_assert (HOST_CHAR_BIT == 8);
9443 read_direct_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
9445 /* If the size of a host char is 8 bits, we can return a pointer
9446 to the string, otherwise we have to copy the string to a buffer
9447 allocated on the temporary obstack. */
9448 gdb_assert (HOST_CHAR_BIT == 8);
9451 *bytes_read_ptr = 1;
9454 *bytes_read_ptr = strlen ((char *) buf) + 1;
9455 return (char *) buf;
9459 read_indirect_string (bfd *abfd, gdb_byte *buf,
9460 const struct comp_unit_head *cu_header,
9461 unsigned int *bytes_read_ptr)
9463 LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr);
9465 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str);
9466 if (dwarf2_per_objfile->str.buffer == NULL)
9468 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
9469 bfd_get_filename (abfd));
9472 if (str_offset >= dwarf2_per_objfile->str.size)
9474 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
9475 bfd_get_filename (abfd));
9478 gdb_assert (HOST_CHAR_BIT == 8);
9479 if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
9481 return (char *) (dwarf2_per_objfile->str.buffer + str_offset);
9484 static unsigned long
9485 read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
9487 unsigned long result;
9488 unsigned int num_read;
9498 byte = bfd_get_8 (abfd, buf);
9501 result |= ((unsigned long)(byte & 127) << shift);
9502 if ((byte & 128) == 0)
9508 *bytes_read_ptr = num_read;
9513 read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
9516 int i, shift, num_read;
9525 byte = bfd_get_8 (abfd, buf);
9528 result |= ((long)(byte & 127) << shift);
9530 if ((byte & 128) == 0)
9535 if ((shift < 8 * sizeof (result)) && (byte & 0x40))
9536 result |= -(((long)1) << shift);
9537 *bytes_read_ptr = num_read;
9541 /* Return a pointer to just past the end of an LEB128 number in BUF. */
9544 skip_leb128 (bfd *abfd, gdb_byte *buf)
9550 byte = bfd_get_8 (abfd, buf);
9552 if ((byte & 128) == 0)
9558 set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
9565 cu->language = language_c;
9567 case DW_LANG_C_plus_plus:
9568 cu->language = language_cplus;
9571 cu->language = language_d;
9573 case DW_LANG_Fortran77:
9574 case DW_LANG_Fortran90:
9575 case DW_LANG_Fortran95:
9576 cu->language = language_fortran;
9578 case DW_LANG_Mips_Assembler:
9579 cu->language = language_asm;
9582 cu->language = language_java;
9586 cu->language = language_ada;
9588 case DW_LANG_Modula2:
9589 cu->language = language_m2;
9591 case DW_LANG_Pascal83:
9592 cu->language = language_pascal;
9595 cu->language = language_objc;
9597 case DW_LANG_Cobol74:
9598 case DW_LANG_Cobol85:
9600 cu->language = language_minimal;
9603 cu->language_defn = language_def (cu->language);
9606 /* Return the named attribute or NULL if not there. */
9608 static struct attribute *
9609 dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
9612 struct attribute *spec = NULL;
9614 for (i = 0; i < die->num_attrs; ++i)
9616 if (die->attrs[i].name == name)
9617 return &die->attrs[i];
9618 if (die->attrs[i].name == DW_AT_specification
9619 || die->attrs[i].name == DW_AT_abstract_origin)
9620 spec = &die->attrs[i];
9625 die = follow_die_ref (die, spec, &cu);
9626 return dwarf2_attr (die, name, cu);
9632 /* Return the named attribute or NULL if not there,
9633 but do not follow DW_AT_specification, etc.
9634 This is for use in contexts where we're reading .debug_types dies.
9635 Following DW_AT_specification, DW_AT_abstract_origin will take us
9636 back up the chain, and we want to go down. */
9638 static struct attribute *
9639 dwarf2_attr_no_follow (struct die_info *die, unsigned int name,
9640 struct dwarf2_cu *cu)
9644 for (i = 0; i < die->num_attrs; ++i)
9645 if (die->attrs[i].name == name)
9646 return &die->attrs[i];
9651 /* Return non-zero iff the attribute NAME is defined for the given DIE,
9652 and holds a non-zero value. This function should only be used for
9653 DW_FORM_flag or DW_FORM_flag_present attributes. */
9656 dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
9658 struct attribute *attr = dwarf2_attr (die, name, cu);
9660 return (attr && DW_UNSND (attr));
9664 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
9666 /* A DIE is a declaration if it has a DW_AT_declaration attribute
9667 which value is non-zero. However, we have to be careful with
9668 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
9669 (via dwarf2_flag_true_p) follows this attribute. So we may
9670 end up accidently finding a declaration attribute that belongs
9671 to a different DIE referenced by the specification attribute,
9672 even though the given DIE does not have a declaration attribute. */
9673 return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
9674 && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
9677 /* Return the die giving the specification for DIE, if there is
9678 one. *SPEC_CU is the CU containing DIE on input, and the CU
9679 containing the return value on output. If there is no
9680 specification, but there is an abstract origin, that is
9683 static struct die_info *
9684 die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
9686 struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
9689 if (spec_attr == NULL)
9690 spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu);
9692 if (spec_attr == NULL)
9695 return follow_die_ref (die, spec_attr, spec_cu);
9698 /* Free the line_header structure *LH, and any arrays and strings it
9701 free_line_header (struct line_header *lh)
9703 if (lh->standard_opcode_lengths)
9704 xfree (lh->standard_opcode_lengths);
9706 /* Remember that all the lh->file_names[i].name pointers are
9707 pointers into debug_line_buffer, and don't need to be freed. */
9709 xfree (lh->file_names);
9711 /* Similarly for the include directory names. */
9712 if (lh->include_dirs)
9713 xfree (lh->include_dirs);
9719 /* Add an entry to LH's include directory table. */
9721 add_include_dir (struct line_header *lh, char *include_dir)
9723 /* Grow the array if necessary. */
9724 if (lh->include_dirs_size == 0)
9726 lh->include_dirs_size = 1; /* for testing */
9727 lh->include_dirs = xmalloc (lh->include_dirs_size
9728 * sizeof (*lh->include_dirs));
9730 else if (lh->num_include_dirs >= lh->include_dirs_size)
9732 lh->include_dirs_size *= 2;
9733 lh->include_dirs = xrealloc (lh->include_dirs,
9734 (lh->include_dirs_size
9735 * sizeof (*lh->include_dirs)));
9738 lh->include_dirs[lh->num_include_dirs++] = include_dir;
9742 /* Add an entry to LH's file name table. */
9744 add_file_name (struct line_header *lh,
9746 unsigned int dir_index,
9747 unsigned int mod_time,
9748 unsigned int length)
9750 struct file_entry *fe;
9752 /* Grow the array if necessary. */
9753 if (lh->file_names_size == 0)
9755 lh->file_names_size = 1; /* for testing */
9756 lh->file_names = xmalloc (lh->file_names_size
9757 * sizeof (*lh->file_names));
9759 else if (lh->num_file_names >= lh->file_names_size)
9761 lh->file_names_size *= 2;
9762 lh->file_names = xrealloc (lh->file_names,
9763 (lh->file_names_size
9764 * sizeof (*lh->file_names)));
9767 fe = &lh->file_names[lh->num_file_names++];
9769 fe->dir_index = dir_index;
9770 fe->mod_time = mod_time;
9771 fe->length = length;
9777 /* Read the statement program header starting at OFFSET in
9778 .debug_line, according to the endianness of ABFD. Return a pointer
9779 to a struct line_header, allocated using xmalloc.
9781 NOTE: the strings in the include directory and file name tables of
9782 the returned object point into debug_line_buffer, and must not be
9784 static struct line_header *
9785 dwarf_decode_line_header (unsigned int offset, bfd *abfd,
9786 struct dwarf2_cu *cu)
9788 struct cleanup *back_to;
9789 struct line_header *lh;
9791 unsigned int bytes_read, offset_size;
9793 char *cur_dir, *cur_file;
9795 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->line);
9796 if (dwarf2_per_objfile->line.buffer == NULL)
9798 complaint (&symfile_complaints, _("missing .debug_line section"));
9802 /* Make sure that at least there's room for the total_length field.
9803 That could be 12 bytes long, but we're just going to fudge that. */
9804 if (offset + 4 >= dwarf2_per_objfile->line.size)
9806 dwarf2_statement_list_fits_in_line_number_section_complaint ();
9810 lh = xmalloc (sizeof (*lh));
9811 memset (lh, 0, sizeof (*lh));
9812 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
9815 line_ptr = dwarf2_per_objfile->line.buffer + offset;
9817 /* Read in the header. */
9819 read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header,
9820 &bytes_read, &offset_size);
9821 line_ptr += bytes_read;
9822 if (line_ptr + lh->total_length > (dwarf2_per_objfile->line.buffer
9823 + dwarf2_per_objfile->line.size))
9825 dwarf2_statement_list_fits_in_line_number_section_complaint ();
9828 lh->statement_program_end = line_ptr + lh->total_length;
9829 lh->version = read_2_bytes (abfd, line_ptr);
9831 lh->header_length = read_offset_1 (abfd, line_ptr, offset_size);
9832 line_ptr += offset_size;
9833 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
9835 if (lh->version >= 4)
9837 lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr);
9841 lh->maximum_ops_per_instruction = 1;
9843 if (lh->maximum_ops_per_instruction == 0)
9845 lh->maximum_ops_per_instruction = 1;
9846 complaint (&symfile_complaints,
9847 _("invalid maximum_ops_per_instruction in `.debug_line' section"));
9850 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
9852 lh->line_base = read_1_signed_byte (abfd, line_ptr);
9854 lh->line_range = read_1_byte (abfd, line_ptr);
9856 lh->opcode_base = read_1_byte (abfd, line_ptr);
9858 lh->standard_opcode_lengths
9859 = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
9861 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
9862 for (i = 1; i < lh->opcode_base; ++i)
9864 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
9868 /* Read directory table. */
9869 while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL)
9871 line_ptr += bytes_read;
9872 add_include_dir (lh, cur_dir);
9874 line_ptr += bytes_read;
9876 /* Read file name table. */
9877 while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL)
9879 unsigned int dir_index, mod_time, length;
9881 line_ptr += bytes_read;
9882 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
9883 line_ptr += bytes_read;
9884 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
9885 line_ptr += bytes_read;
9886 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
9887 line_ptr += bytes_read;
9889 add_file_name (lh, cur_file, dir_index, mod_time, length);
9891 line_ptr += bytes_read;
9892 lh->statement_program_start = line_ptr;
9894 if (line_ptr > (dwarf2_per_objfile->line.buffer
9895 + dwarf2_per_objfile->line.size))
9896 complaint (&symfile_complaints,
9897 _("line number info header doesn't fit in `.debug_line' section"));
9899 discard_cleanups (back_to);
9903 /* This function exists to work around a bug in certain compilers
9904 (particularly GCC 2.95), in which the first line number marker of a
9905 function does not show up until after the prologue, right before
9906 the second line number marker. This function shifts ADDRESS down
9907 to the beginning of the function if necessary, and is called on
9908 addresses passed to record_line. */
9911 check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu)
9913 struct function_range *fn;
9915 /* Find the function_range containing address. */
9920 cu->cached_fn = cu->first_fn;
9924 if (fn->lowpc <= address && fn->highpc > address)
9930 while (fn && fn != cu->cached_fn)
9931 if (fn->lowpc <= address && fn->highpc > address)
9941 if (address != fn->lowpc)
9942 complaint (&symfile_complaints,
9943 _("misplaced first line number at 0x%lx for '%s'"),
9944 (unsigned long) address, fn->name);
9949 /* Subroutine of dwarf_decode_lines to simplify it.
9950 Return the file name of the psymtab for included file FILE_INDEX
9951 in line header LH of PST.
9952 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
9953 If space for the result is malloc'd, it will be freed by a cleanup.
9954 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
9957 psymtab_include_file_name (const struct line_header *lh, int file_index,
9958 const struct partial_symtab *pst,
9959 const char *comp_dir)
9961 const struct file_entry fe = lh->file_names [file_index];
9962 char *include_name = fe.name;
9963 char *include_name_to_compare = include_name;
9964 char *dir_name = NULL;
9969 dir_name = lh->include_dirs[fe.dir_index - 1];
9971 if (!IS_ABSOLUTE_PATH (include_name)
9972 && (dir_name != NULL || comp_dir != NULL))
9974 /* Avoid creating a duplicate psymtab for PST.
9975 We do this by comparing INCLUDE_NAME and PST_FILENAME.
9976 Before we do the comparison, however, we need to account
9977 for DIR_NAME and COMP_DIR.
9978 First prepend dir_name (if non-NULL). If we still don't
9979 have an absolute path prepend comp_dir (if non-NULL).
9980 However, the directory we record in the include-file's
9981 psymtab does not contain COMP_DIR (to match the
9982 corresponding symtab(s)).
9987 bash$ gcc -g ./hello.c
9988 include_name = "hello.c"
9990 DW_AT_comp_dir = comp_dir = "/tmp"
9991 DW_AT_name = "./hello.c" */
9993 if (dir_name != NULL)
9995 include_name = concat (dir_name, SLASH_STRING,
9996 include_name, (char *)NULL);
9997 include_name_to_compare = include_name;
9998 make_cleanup (xfree, include_name);
10000 if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL)
10002 include_name_to_compare = concat (comp_dir, SLASH_STRING,
10003 include_name, (char *)NULL);
10007 pst_filename = pst->filename;
10008 if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
10010 pst_filename = concat (pst->dirname, SLASH_STRING,
10011 pst_filename, (char *)NULL);
10014 file_is_pst = strcmp (include_name_to_compare, pst_filename) == 0;
10016 if (include_name_to_compare != include_name)
10017 xfree (include_name_to_compare);
10018 if (pst_filename != pst->filename)
10019 xfree (pst_filename);
10023 return include_name;
10026 /* Decode the Line Number Program (LNP) for the given line_header
10027 structure and CU. The actual information extracted and the type
10028 of structures created from the LNP depends on the value of PST.
10030 1. If PST is NULL, then this procedure uses the data from the program
10031 to create all necessary symbol tables, and their linetables.
10033 2. If PST is not NULL, this procedure reads the program to determine
10034 the list of files included by the unit represented by PST, and
10035 builds all the associated partial symbol tables.
10037 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
10038 It is used for relative paths in the line table.
10039 NOTE: When processing partial symtabs (pst != NULL),
10040 comp_dir == pst->dirname.
10042 NOTE: It is important that psymtabs have the same file name (via strcmp)
10043 as the corresponding symtab. Since COMP_DIR is not used in the name of the
10044 symtab we don't use it in the name of the psymtabs we create.
10045 E.g. expand_line_sal requires this when finding psymtabs to expand.
10046 A good testcase for this is mb-inline.exp. */
10049 dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd,
10050 struct dwarf2_cu *cu, struct partial_symtab *pst)
10052 gdb_byte *line_ptr, *extended_end;
10053 gdb_byte *line_end;
10054 unsigned int bytes_read, extended_len;
10055 unsigned char op_code, extended_op, adj_opcode;
10056 CORE_ADDR baseaddr;
10057 struct objfile *objfile = cu->objfile;
10058 struct gdbarch *gdbarch = get_objfile_arch (objfile);
10059 const int decode_for_pst_p = (pst != NULL);
10060 struct subfile *last_subfile = NULL, *first_subfile = current_subfile;
10062 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
10064 line_ptr = lh->statement_program_start;
10065 line_end = lh->statement_program_end;
10067 /* Read the statement sequences until there's nothing left. */
10068 while (line_ptr < line_end)
10070 /* state machine registers */
10071 CORE_ADDR address = 0;
10072 unsigned int file = 1;
10073 unsigned int line = 1;
10074 unsigned int column = 0;
10075 int is_stmt = lh->default_is_stmt;
10076 int basic_block = 0;
10077 int end_sequence = 0;
10079 unsigned char op_index = 0;
10081 if (!decode_for_pst_p && lh->num_file_names >= file)
10083 /* Start a subfile for the current file of the state machine. */
10084 /* lh->include_dirs and lh->file_names are 0-based, but the
10085 directory and file name numbers in the statement program
10087 struct file_entry *fe = &lh->file_names[file - 1];
10091 dir = lh->include_dirs[fe->dir_index - 1];
10093 dwarf2_start_subfile (fe->name, dir, comp_dir);
10096 /* Decode the table. */
10097 while (!end_sequence)
10099 op_code = read_1_byte (abfd, line_ptr);
10101 if (line_ptr > line_end)
10103 dwarf2_debug_line_missing_end_sequence_complaint ();
10107 if (op_code >= lh->opcode_base)
10109 /* Special operand. */
10110 adj_opcode = op_code - lh->opcode_base;
10111 address += (((op_index + (adj_opcode / lh->line_range))
10112 / lh->maximum_ops_per_instruction)
10113 * lh->minimum_instruction_length);
10114 op_index = ((op_index + (adj_opcode / lh->line_range))
10115 % lh->maximum_ops_per_instruction);
10116 line += lh->line_base + (adj_opcode % lh->line_range);
10117 if (lh->num_file_names < file || file == 0)
10118 dwarf2_debug_line_missing_file_complaint ();
10119 /* For now we ignore lines not starting on an
10120 instruction boundary. */
10121 else if (op_index == 0)
10123 lh->file_names[file - 1].included_p = 1;
10124 if (!decode_for_pst_p && is_stmt)
10126 if (last_subfile != current_subfile)
10128 addr = gdbarch_addr_bits_remove (gdbarch, address);
10130 record_line (last_subfile, 0, addr);
10131 last_subfile = current_subfile;
10133 /* Append row to matrix using current values. */
10134 addr = check_cu_functions (address, cu);
10135 addr = gdbarch_addr_bits_remove (gdbarch, addr);
10136 record_line (current_subfile, line, addr);
10141 else switch (op_code)
10143 case DW_LNS_extended_op:
10144 extended_len = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10145 line_ptr += bytes_read;
10146 extended_end = line_ptr + extended_len;
10147 extended_op = read_1_byte (abfd, line_ptr);
10149 switch (extended_op)
10151 case DW_LNE_end_sequence:
10154 case DW_LNE_set_address:
10155 address = read_address (abfd, line_ptr, cu, &bytes_read);
10157 line_ptr += bytes_read;
10158 address += baseaddr;
10160 case DW_LNE_define_file:
10163 unsigned int dir_index, mod_time, length;
10165 cur_file = read_direct_string (abfd, line_ptr, &bytes_read);
10166 line_ptr += bytes_read;
10168 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10169 line_ptr += bytes_read;
10171 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10172 line_ptr += bytes_read;
10174 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10175 line_ptr += bytes_read;
10176 add_file_name (lh, cur_file, dir_index, mod_time, length);
10179 case DW_LNE_set_discriminator:
10180 /* The discriminator is not interesting to the debugger;
10182 line_ptr = extended_end;
10185 complaint (&symfile_complaints,
10186 _("mangled .debug_line section"));
10189 /* Make sure that we parsed the extended op correctly. If e.g.
10190 we expected a different address size than the producer used,
10191 we may have read the wrong number of bytes. */
10192 if (line_ptr != extended_end)
10194 complaint (&symfile_complaints,
10195 _("mangled .debug_line section"));
10200 if (lh->num_file_names < file || file == 0)
10201 dwarf2_debug_line_missing_file_complaint ();
10204 lh->file_names[file - 1].included_p = 1;
10205 if (!decode_for_pst_p && is_stmt)
10207 if (last_subfile != current_subfile)
10209 addr = gdbarch_addr_bits_remove (gdbarch, address);
10211 record_line (last_subfile, 0, addr);
10212 last_subfile = current_subfile;
10214 addr = check_cu_functions (address, cu);
10215 addr = gdbarch_addr_bits_remove (gdbarch, addr);
10216 record_line (current_subfile, line, addr);
10221 case DW_LNS_advance_pc:
10224 = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10226 address += (((op_index + adjust)
10227 / lh->maximum_ops_per_instruction)
10228 * lh->minimum_instruction_length);
10229 op_index = ((op_index + adjust)
10230 % lh->maximum_ops_per_instruction);
10231 line_ptr += bytes_read;
10234 case DW_LNS_advance_line:
10235 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
10236 line_ptr += bytes_read;
10238 case DW_LNS_set_file:
10240 /* The arrays lh->include_dirs and lh->file_names are
10241 0-based, but the directory and file name numbers in
10242 the statement program are 1-based. */
10243 struct file_entry *fe;
10246 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10247 line_ptr += bytes_read;
10248 if (lh->num_file_names < file || file == 0)
10249 dwarf2_debug_line_missing_file_complaint ();
10252 fe = &lh->file_names[file - 1];
10254 dir = lh->include_dirs[fe->dir_index - 1];
10255 if (!decode_for_pst_p)
10257 last_subfile = current_subfile;
10258 dwarf2_start_subfile (fe->name, dir, comp_dir);
10263 case DW_LNS_set_column:
10264 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10265 line_ptr += bytes_read;
10267 case DW_LNS_negate_stmt:
10268 is_stmt = (!is_stmt);
10270 case DW_LNS_set_basic_block:
10273 /* Add to the address register of the state machine the
10274 address increment value corresponding to special opcode
10275 255. I.e., this value is scaled by the minimum
10276 instruction length since special opcode 255 would have
10277 scaled the the increment. */
10278 case DW_LNS_const_add_pc:
10280 CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range;
10282 address += (((op_index + adjust)
10283 / lh->maximum_ops_per_instruction)
10284 * lh->minimum_instruction_length);
10285 op_index = ((op_index + adjust)
10286 % lh->maximum_ops_per_instruction);
10289 case DW_LNS_fixed_advance_pc:
10290 address += read_2_bytes (abfd, line_ptr);
10296 /* Unknown standard opcode, ignore it. */
10299 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
10301 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10302 line_ptr += bytes_read;
10307 if (lh->num_file_names < file || file == 0)
10308 dwarf2_debug_line_missing_file_complaint ();
10311 lh->file_names[file - 1].included_p = 1;
10312 if (!decode_for_pst_p)
10314 addr = gdbarch_addr_bits_remove (gdbarch, address);
10315 record_line (current_subfile, 0, addr);
10320 if (decode_for_pst_p)
10324 /* Now that we're done scanning the Line Header Program, we can
10325 create the psymtab of each included file. */
10326 for (file_index = 0; file_index < lh->num_file_names; file_index++)
10327 if (lh->file_names[file_index].included_p == 1)
10329 char *include_name =
10330 psymtab_include_file_name (lh, file_index, pst, comp_dir);
10331 if (include_name != NULL)
10332 dwarf2_create_include_psymtab (include_name, pst, objfile);
10337 /* Make sure a symtab is created for every file, even files
10338 which contain only variables (i.e. no code with associated
10342 struct file_entry *fe;
10344 for (i = 0; i < lh->num_file_names; i++)
10348 fe = &lh->file_names[i];
10350 dir = lh->include_dirs[fe->dir_index - 1];
10351 dwarf2_start_subfile (fe->name, dir, comp_dir);
10353 /* Skip the main file; we don't need it, and it must be
10354 allocated last, so that it will show up before the
10355 non-primary symtabs in the objfile's symtab list. */
10356 if (current_subfile == first_subfile)
10359 if (current_subfile->symtab == NULL)
10360 current_subfile->symtab = allocate_symtab (current_subfile->name,
10362 fe->symtab = current_subfile->symtab;
10367 /* Start a subfile for DWARF. FILENAME is the name of the file and
10368 DIRNAME the name of the source directory which contains FILENAME
10369 or NULL if not known. COMP_DIR is the compilation directory for the
10370 linetable's compilation unit or NULL if not known.
10371 This routine tries to keep line numbers from identical absolute and
10372 relative file names in a common subfile.
10374 Using the `list' example from the GDB testsuite, which resides in
10375 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
10376 of /srcdir/list0.c yields the following debugging information for list0.c:
10378 DW_AT_name: /srcdir/list0.c
10379 DW_AT_comp_dir: /compdir
10380 files.files[0].name: list0.h
10381 files.files[0].dir: /srcdir
10382 files.files[1].name: list0.c
10383 files.files[1].dir: /srcdir
10385 The line number information for list0.c has to end up in a single
10386 subfile, so that `break /srcdir/list0.c:1' works as expected.
10387 start_subfile will ensure that this happens provided that we pass the
10388 concatenation of files.files[1].dir and files.files[1].name as the
10392 dwarf2_start_subfile (char *filename, char *dirname, char *comp_dir)
10396 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
10397 `start_symtab' will always pass the contents of DW_AT_comp_dir as
10398 second argument to start_subfile. To be consistent, we do the
10399 same here. In order not to lose the line information directory,
10400 we concatenate it to the filename when it makes sense.
10401 Note that the Dwarf3 standard says (speaking of filenames in line
10402 information): ``The directory index is ignored for file names
10403 that represent full path names''. Thus ignoring dirname in the
10404 `else' branch below isn't an issue. */
10406 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
10407 fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
10409 fullname = filename;
10411 start_subfile (fullname, comp_dir);
10413 if (fullname != filename)
10418 var_decode_location (struct attribute *attr, struct symbol *sym,
10419 struct dwarf2_cu *cu)
10421 struct objfile *objfile = cu->objfile;
10422 struct comp_unit_head *cu_header = &cu->header;
10424 /* NOTE drow/2003-01-30: There used to be a comment and some special
10425 code here to turn a symbol with DW_AT_external and a
10426 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
10427 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
10428 with some versions of binutils) where shared libraries could have
10429 relocations against symbols in their debug information - the
10430 minimal symbol would have the right address, but the debug info
10431 would not. It's no longer necessary, because we will explicitly
10432 apply relocations when we read in the debug information now. */
10434 /* A DW_AT_location attribute with no contents indicates that a
10435 variable has been optimized away. */
10436 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
10438 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
10442 /* Handle one degenerate form of location expression specially, to
10443 preserve GDB's previous behavior when section offsets are
10444 specified. If this is just a DW_OP_addr then mark this symbol
10447 if (attr_form_is_block (attr)
10448 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
10449 && DW_BLOCK (attr)->data[0] == DW_OP_addr)
10451 unsigned int dummy;
10453 SYMBOL_VALUE_ADDRESS (sym) =
10454 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
10455 SYMBOL_CLASS (sym) = LOC_STATIC;
10456 fixup_symbol_section (sym, objfile);
10457 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
10458 SYMBOL_SECTION (sym));
10462 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
10463 expression evaluator, and use LOC_COMPUTED only when necessary
10464 (i.e. when the value of a register or memory location is
10465 referenced, or a thread-local block, etc.). Then again, it might
10466 not be worthwhile. I'm assuming that it isn't unless performance
10467 or memory numbers show me otherwise. */
10469 dwarf2_symbol_mark_computed (attr, sym, cu);
10470 SYMBOL_CLASS (sym) = LOC_COMPUTED;
10473 /* Given a pointer to a DWARF information entry, figure out if we need
10474 to make a symbol table entry for it, and if so, create a new entry
10475 and return a pointer to it.
10476 If TYPE is NULL, determine symbol type from the die, otherwise
10477 used the passed type.
10478 If SPACE is not NULL, use it to hold the new symbol. If it is
10479 NULL, allocate a new symbol on the objfile's obstack. */
10481 static struct symbol *
10482 new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu,
10483 struct symbol *space)
10485 struct objfile *objfile = cu->objfile;
10486 struct symbol *sym = NULL;
10488 struct attribute *attr = NULL;
10489 struct attribute *attr2 = NULL;
10490 CORE_ADDR baseaddr;
10491 struct pending **list_to_add = NULL;
10493 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
10495 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
10497 name = dwarf2_name (die, cu);
10500 const char *linkagename;
10501 int suppress_add = 0;
10506 sym = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol);
10507 OBJSTAT (objfile, n_syms++);
10509 /* Cache this symbol's name and the name's demangled form (if any). */
10510 SYMBOL_SET_LANGUAGE (sym, cu->language);
10511 linkagename = dwarf2_physname (name, die, cu);
10512 SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile);
10514 /* Fortran does not have mangling standard and the mangling does differ
10515 between gfortran, iFort etc. */
10516 if (cu->language == language_fortran
10517 && symbol_get_demangled_name (&(sym->ginfo)) == NULL)
10518 symbol_set_demangled_name (&(sym->ginfo),
10519 (char *) dwarf2_full_name (name, die, cu),
10522 /* Default assumptions.
10523 Use the passed type or decode it from the die. */
10524 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
10525 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
10527 SYMBOL_TYPE (sym) = type;
10529 SYMBOL_TYPE (sym) = die_type (die, cu);
10530 attr = dwarf2_attr (die,
10531 inlined_func ? DW_AT_call_line : DW_AT_decl_line,
10535 SYMBOL_LINE (sym) = DW_UNSND (attr);
10538 attr = dwarf2_attr (die,
10539 inlined_func ? DW_AT_call_file : DW_AT_decl_file,
10543 int file_index = DW_UNSND (attr);
10545 if (cu->line_header == NULL
10546 || file_index > cu->line_header->num_file_names)
10547 complaint (&symfile_complaints,
10548 _("file index out of range"));
10549 else if (file_index > 0)
10551 struct file_entry *fe;
10553 fe = &cu->line_header->file_names[file_index - 1];
10554 SYMBOL_SYMTAB (sym) = fe->symtab;
10561 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
10564 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
10566 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr;
10567 SYMBOL_DOMAIN (sym) = LABEL_DOMAIN;
10568 SYMBOL_CLASS (sym) = LOC_LABEL;
10569 add_symbol_to_list (sym, cu->list_in_scope);
10571 case DW_TAG_subprogram:
10572 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10574 SYMBOL_CLASS (sym) = LOC_BLOCK;
10575 attr2 = dwarf2_attr (die, DW_AT_external, cu);
10576 if ((attr2 && (DW_UNSND (attr2) != 0))
10577 || cu->language == language_ada)
10579 /* Subprograms marked external are stored as a global symbol.
10580 Ada subprograms, whether marked external or not, are always
10581 stored as a global symbol, because we want to be able to
10582 access them globally. For instance, we want to be able
10583 to break on a nested subprogram without having to
10584 specify the context. */
10585 list_to_add = &global_symbols;
10589 list_to_add = cu->list_in_scope;
10592 case DW_TAG_inlined_subroutine:
10593 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10595 SYMBOL_CLASS (sym) = LOC_BLOCK;
10596 SYMBOL_INLINED (sym) = 1;
10597 /* Do not add the symbol to any lists. It will be found via
10598 BLOCK_FUNCTION from the blockvector. */
10600 case DW_TAG_template_value_param:
10602 /* Fall through. */
10603 case DW_TAG_constant:
10604 case DW_TAG_variable:
10605 case DW_TAG_member:
10606 /* Compilation with minimal debug info may result in variables
10607 with missing type entries. Change the misleading `void' type
10608 to something sensible. */
10609 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
10611 = objfile_type (objfile)->nodebug_data_symbol;
10613 attr = dwarf2_attr (die, DW_AT_const_value, cu);
10614 /* In the case of DW_TAG_member, we should only be called for
10615 static const members. */
10616 if (die->tag == DW_TAG_member)
10618 /* dwarf2_add_field uses die_is_declaration,
10619 so we do the same. */
10620 gdb_assert (die_is_declaration (die, cu));
10625 dwarf2_const_value (attr, sym, cu);
10626 attr2 = dwarf2_attr (die, DW_AT_external, cu);
10629 if (attr2 && (DW_UNSND (attr2) != 0))
10630 list_to_add = &global_symbols;
10632 list_to_add = cu->list_in_scope;
10636 attr = dwarf2_attr (die, DW_AT_location, cu);
10639 var_decode_location (attr, sym, cu);
10640 attr2 = dwarf2_attr (die, DW_AT_external, cu);
10641 if (SYMBOL_CLASS (sym) == LOC_STATIC
10642 && SYMBOL_VALUE_ADDRESS (sym) == 0
10643 && !dwarf2_per_objfile->has_section_at_zero)
10645 /* When a static variable is eliminated by the linker,
10646 the corresponding debug information is not stripped
10647 out, but the variable address is set to null;
10648 do not add such variables into symbol table. */
10650 else if (attr2 && (DW_UNSND (attr2) != 0))
10652 /* Workaround gfortran PR debug/40040 - it uses
10653 DW_AT_location for variables in -fPIC libraries which may
10654 get overriden by other libraries/executable and get
10655 a different address. Resolve it by the minimal symbol
10656 which may come from inferior's executable using copy
10657 relocation. Make this workaround only for gfortran as for
10658 other compilers GDB cannot guess the minimal symbol
10659 Fortran mangling kind. */
10660 if (cu->language == language_fortran && die->parent
10661 && die->parent->tag == DW_TAG_module
10663 && strncmp (cu->producer, "GNU Fortran ", 12) == 0)
10664 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
10666 /* A variable with DW_AT_external is never static,
10667 but it may be block-scoped. */
10668 list_to_add = (cu->list_in_scope == &file_symbols
10669 ? &global_symbols : cu->list_in_scope);
10672 list_to_add = cu->list_in_scope;
10676 /* We do not know the address of this symbol.
10677 If it is an external symbol and we have type information
10678 for it, enter the symbol as a LOC_UNRESOLVED symbol.
10679 The address of the variable will then be determined from
10680 the minimal symbol table whenever the variable is
10682 attr2 = dwarf2_attr (die, DW_AT_external, cu);
10683 if (attr2 && (DW_UNSND (attr2) != 0)
10684 && dwarf2_attr (die, DW_AT_type, cu) != NULL)
10686 /* A variable with DW_AT_external is never static, but it
10687 may be block-scoped. */
10688 list_to_add = (cu->list_in_scope == &file_symbols
10689 ? &global_symbols : cu->list_in_scope);
10691 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
10693 else if (!die_is_declaration (die, cu))
10695 /* Use the default LOC_OPTIMIZED_OUT class. */
10696 gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT);
10698 list_to_add = cu->list_in_scope;
10702 case DW_TAG_formal_parameter:
10703 /* If we are inside a function, mark this as an argument. If
10704 not, we might be looking at an argument to an inlined function
10705 when we do not have enough information to show inlined frames;
10706 pretend it's a local variable in that case so that the user can
10708 if (context_stack_depth > 0
10709 && context_stack[context_stack_depth - 1].name != NULL)
10710 SYMBOL_IS_ARGUMENT (sym) = 1;
10711 attr = dwarf2_attr (die, DW_AT_location, cu);
10714 var_decode_location (attr, sym, cu);
10716 attr = dwarf2_attr (die, DW_AT_const_value, cu);
10719 dwarf2_const_value (attr, sym, cu);
10721 attr = dwarf2_attr (die, DW_AT_variable_parameter, cu);
10722 if (attr && DW_UNSND (attr))
10724 struct type *ref_type;
10726 ref_type = lookup_reference_type (SYMBOL_TYPE (sym));
10727 SYMBOL_TYPE (sym) = ref_type;
10730 list_to_add = cu->list_in_scope;
10732 case DW_TAG_unspecified_parameters:
10733 /* From varargs functions; gdb doesn't seem to have any
10734 interest in this information, so just ignore it for now.
10737 case DW_TAG_template_type_param:
10739 /* Fall through. */
10740 case DW_TAG_class_type:
10741 case DW_TAG_interface_type:
10742 case DW_TAG_structure_type:
10743 case DW_TAG_union_type:
10744 case DW_TAG_set_type:
10745 case DW_TAG_enumeration_type:
10746 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
10747 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
10750 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
10751 really ever be static objects: otherwise, if you try
10752 to, say, break of a class's method and you're in a file
10753 which doesn't mention that class, it won't work unless
10754 the check for all static symbols in lookup_symbol_aux
10755 saves you. See the OtherFileClass tests in
10756 gdb.c++/namespace.exp. */
10760 list_to_add = (cu->list_in_scope == &file_symbols
10761 && (cu->language == language_cplus
10762 || cu->language == language_java)
10763 ? &global_symbols : cu->list_in_scope);
10765 /* The semantics of C++ state that "struct foo {
10766 ... }" also defines a typedef for "foo". A Java
10767 class declaration also defines a typedef for the
10769 if (cu->language == language_cplus
10770 || cu->language == language_java
10771 || cu->language == language_ada)
10773 /* The symbol's name is already allocated along
10774 with this objfile, so we don't need to
10775 duplicate it for the type. */
10776 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
10777 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
10782 case DW_TAG_typedef:
10783 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
10784 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
10785 list_to_add = cu->list_in_scope;
10787 case DW_TAG_base_type:
10788 case DW_TAG_subrange_type:
10789 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
10790 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
10791 list_to_add = cu->list_in_scope;
10793 case DW_TAG_enumerator:
10794 attr = dwarf2_attr (die, DW_AT_const_value, cu);
10797 dwarf2_const_value (attr, sym, cu);
10800 /* NOTE: carlton/2003-11-10: See comment above in the
10801 DW_TAG_class_type, etc. block. */
10803 list_to_add = (cu->list_in_scope == &file_symbols
10804 && (cu->language == language_cplus
10805 || cu->language == language_java)
10806 ? &global_symbols : cu->list_in_scope);
10809 case DW_TAG_namespace:
10810 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
10811 list_to_add = &global_symbols;
10814 /* Not a tag we recognize. Hopefully we aren't processing
10815 trash data, but since we must specifically ignore things
10816 we don't recognize, there is nothing else we should do at
10818 complaint (&symfile_complaints, _("unsupported tag: '%s'"),
10819 dwarf_tag_name (die->tag));
10825 sym->hash_next = objfile->template_symbols;
10826 objfile->template_symbols = sym;
10827 list_to_add = NULL;
10830 if (list_to_add != NULL)
10831 add_symbol_to_list (sym, list_to_add);
10833 /* For the benefit of old versions of GCC, check for anonymous
10834 namespaces based on the demangled name. */
10835 if (!processing_has_namespace_info
10836 && cu->language == language_cplus)
10837 cp_scan_for_anonymous_namespaces (sym);
10842 /* A wrapper for new_symbol_full that always allocates a new symbol. */
10844 static struct symbol *
10845 new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
10847 return new_symbol_full (die, type, cu, NULL);
10850 /* Given an attr with a DW_FORM_dataN value in host byte order,
10851 zero-extend it as appropriate for the symbol's type. The DWARF
10852 standard (v4) is not entirely clear about the meaning of using
10853 DW_FORM_dataN for a constant with a signed type, where the type is
10854 wider than the data. The conclusion of a discussion on the DWARF
10855 list was that this is unspecified. We choose to always zero-extend
10856 because that is the interpretation long in use by GCC. */
10859 dwarf2_const_value_data (struct attribute *attr, struct type *type,
10860 const char *name, struct obstack *obstack,
10861 struct dwarf2_cu *cu, long *value, int bits)
10863 struct objfile *objfile = cu->objfile;
10864 enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ?
10865 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
10866 LONGEST l = DW_UNSND (attr);
10868 if (bits < sizeof (*value) * 8)
10870 l &= ((LONGEST) 1 << bits) - 1;
10873 else if (bits == sizeof (*value) * 8)
10877 gdb_byte *bytes = obstack_alloc (obstack, bits / 8);
10878 store_unsigned_integer (bytes, bits / 8, byte_order, l);
10885 /* Read a constant value from an attribute. Either set *VALUE, or if
10886 the value does not fit in *VALUE, set *BYTES - either already
10887 allocated on the objfile obstack, or newly allocated on OBSTACK,
10888 or, set *BATON, if we translated the constant to a location
10892 dwarf2_const_value_attr (struct attribute *attr, struct type *type,
10893 const char *name, struct obstack *obstack,
10894 struct dwarf2_cu *cu,
10895 long *value, gdb_byte **bytes,
10896 struct dwarf2_locexpr_baton **baton)
10898 struct objfile *objfile = cu->objfile;
10899 struct comp_unit_head *cu_header = &cu->header;
10900 struct dwarf_block *blk;
10901 enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ?
10902 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE);
10908 switch (attr->form)
10914 if (TYPE_LENGTH (type) != cu_header->addr_size)
10915 dwarf2_const_value_length_mismatch_complaint (name,
10916 cu_header->addr_size,
10917 TYPE_LENGTH (type));
10918 /* Symbols of this form are reasonably rare, so we just
10919 piggyback on the existing location code rather than writing
10920 a new implementation of symbol_computed_ops. */
10921 *baton = obstack_alloc (&objfile->objfile_obstack,
10922 sizeof (struct dwarf2_locexpr_baton));
10923 (*baton)->per_cu = cu->per_cu;
10924 gdb_assert ((*baton)->per_cu);
10926 (*baton)->size = 2 + cu_header->addr_size;
10927 data = obstack_alloc (&objfile->objfile_obstack, (*baton)->size);
10928 (*baton)->data = data;
10930 data[0] = DW_OP_addr;
10931 store_unsigned_integer (&data[1], cu_header->addr_size,
10932 byte_order, DW_ADDR (attr));
10933 data[cu_header->addr_size + 1] = DW_OP_stack_value;
10936 case DW_FORM_string:
10938 /* DW_STRING is already allocated on the objfile obstack, point
10940 *bytes = (gdb_byte *) DW_STRING (attr);
10942 case DW_FORM_block1:
10943 case DW_FORM_block2:
10944 case DW_FORM_block4:
10945 case DW_FORM_block:
10946 case DW_FORM_exprloc:
10947 blk = DW_BLOCK (attr);
10948 if (TYPE_LENGTH (type) != blk->size)
10949 dwarf2_const_value_length_mismatch_complaint (name, blk->size,
10950 TYPE_LENGTH (type));
10951 *bytes = blk->data;
10954 /* The DW_AT_const_value attributes are supposed to carry the
10955 symbol's value "represented as it would be on the target
10956 architecture." By the time we get here, it's already been
10957 converted to host endianness, so we just need to sign- or
10958 zero-extend it as appropriate. */
10959 case DW_FORM_data1:
10960 *bytes = dwarf2_const_value_data (attr, type, name, obstack, cu, value, 8);
10962 case DW_FORM_data2:
10963 *bytes = dwarf2_const_value_data (attr, type, name, obstack, cu, value, 16);
10965 case DW_FORM_data4:
10966 *bytes = dwarf2_const_value_data (attr, type, name, obstack, cu, value, 32);
10968 case DW_FORM_data8:
10969 *bytes = dwarf2_const_value_data (attr, type, name, obstack, cu, value, 64);
10972 case DW_FORM_sdata:
10973 *value = DW_SND (attr);
10976 case DW_FORM_udata:
10977 *value = DW_UNSND (attr);
10981 complaint (&symfile_complaints,
10982 _("unsupported const value attribute form: '%s'"),
10983 dwarf_form_name (attr->form));
10990 /* Copy constant value from an attribute to a symbol. */
10993 dwarf2_const_value (struct attribute *attr, struct symbol *sym,
10994 struct dwarf2_cu *cu)
10996 struct objfile *objfile = cu->objfile;
10997 struct comp_unit_head *cu_header = &cu->header;
11000 struct dwarf2_locexpr_baton *baton;
11002 dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym),
11003 SYMBOL_PRINT_NAME (sym),
11004 &objfile->objfile_obstack, cu,
11005 &value, &bytes, &baton);
11009 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
11010 SYMBOL_LOCATION_BATON (sym) = baton;
11011 SYMBOL_CLASS (sym) = LOC_COMPUTED;
11013 else if (bytes != NULL)
11015 SYMBOL_VALUE_BYTES (sym) = bytes;
11016 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
11020 SYMBOL_VALUE (sym) = value;
11021 SYMBOL_CLASS (sym) = LOC_CONST;
11025 /* Return the type of the die in question using its DW_AT_type attribute. */
11027 static struct type *
11028 die_type (struct die_info *die, struct dwarf2_cu *cu)
11030 struct attribute *type_attr;
11032 type_attr = dwarf2_attr (die, DW_AT_type, cu);
11035 /* A missing DW_AT_type represents a void type. */
11036 return objfile_type (cu->objfile)->builtin_void;
11039 return lookup_die_type (die, type_attr, cu);
11042 /* True iff CU's producer generates GNAT Ada auxiliary information
11043 that allows to find parallel types through that information instead
11044 of having to do expensive parallel lookups by type name. */
11047 need_gnat_info (struct dwarf2_cu *cu)
11049 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
11050 of GNAT produces this auxiliary information, without any indication
11051 that it is produced. Part of enhancing the FSF version of GNAT
11052 to produce that information will be to put in place an indicator
11053 that we can use in order to determine whether the descriptive type
11054 info is available or not. One suggestion that has been made is
11055 to use a new attribute, attached to the CU die. For now, assume
11056 that the descriptive type info is not available. */
11060 /* Return the auxiliary type of the die in question using its
11061 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
11062 attribute is not present. */
11064 static struct type *
11065 die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu)
11067 struct attribute *type_attr;
11069 type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu);
11073 return lookup_die_type (die, type_attr, cu);
11076 /* If DIE has a descriptive_type attribute, then set the TYPE's
11077 descriptive type accordingly. */
11080 set_descriptive_type (struct type *type, struct die_info *die,
11081 struct dwarf2_cu *cu)
11083 struct type *descriptive_type = die_descriptive_type (die, cu);
11085 if (descriptive_type)
11087 ALLOCATE_GNAT_AUX_TYPE (type);
11088 TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type;
11092 /* Return the containing type of the die in question using its
11093 DW_AT_containing_type attribute. */
11095 static struct type *
11096 die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
11098 struct attribute *type_attr;
11100 type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
11102 error (_("Dwarf Error: Problem turning containing type into gdb type "
11103 "[in module %s]"), cu->objfile->name);
11105 return lookup_die_type (die, type_attr, cu);
11108 /* Look up the type of DIE in CU using its type attribute ATTR.
11109 If there is no type substitute an error marker. */
11111 static struct type *
11112 lookup_die_type (struct die_info *die, struct attribute *attr,
11113 struct dwarf2_cu *cu)
11115 struct type *this_type;
11117 /* First see if we have it cached. */
11119 if (is_ref_attr (attr))
11121 unsigned int offset = dwarf2_get_ref_die_offset (attr);
11123 this_type = get_die_type_at_offset (offset, cu->per_cu);
11125 else if (attr->form == DW_FORM_sig8)
11127 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
11128 struct dwarf2_cu *sig_cu;
11129 unsigned int offset;
11131 /* sig_type will be NULL if the signatured type is missing from
11133 if (sig_type == NULL)
11134 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
11135 "at 0x%x [in module %s]"),
11136 die->offset, cu->objfile->name);
11138 gdb_assert (sig_type->per_cu.from_debug_types);
11139 offset = sig_type->offset + sig_type->type_offset;
11140 this_type = get_die_type_at_offset (offset, &sig_type->per_cu);
11144 dump_die_for_error (die);
11145 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
11146 dwarf_attr_name (attr->name), cu->objfile->name);
11149 /* If not cached we need to read it in. */
11151 if (this_type == NULL)
11153 struct die_info *type_die;
11154 struct dwarf2_cu *type_cu = cu;
11156 type_die = follow_die_ref_or_sig (die, attr, &type_cu);
11157 /* If the type is cached, we should have found it above. */
11158 gdb_assert (get_die_type (type_die, type_cu) == NULL);
11159 this_type = read_type_die_1 (type_die, type_cu);
11162 /* If we still don't have a type use an error marker. */
11164 if (this_type == NULL)
11166 char *message, *saved;
11168 /* read_type_die already issued a complaint. */
11169 message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
11173 saved = obstack_copy0 (&cu->objfile->objfile_obstack,
11174 message, strlen (message));
11177 this_type = init_type (TYPE_CODE_ERROR, 0, 0, saved, cu->objfile);
11183 /* Return the type in DIE, CU.
11184 Returns NULL for invalid types.
11186 This first does a lookup in the appropriate type_hash table,
11187 and only reads the die in if necessary.
11189 NOTE: This can be called when reading in partial or full symbols. */
11191 static struct type *
11192 read_type_die (struct die_info *die, struct dwarf2_cu *cu)
11194 struct type *this_type;
11196 this_type = get_die_type (die, cu);
11200 return read_type_die_1 (die, cu);
11203 /* Read the type in DIE, CU.
11204 Returns NULL for invalid types. */
11206 static struct type *
11207 read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu)
11209 struct type *this_type = NULL;
11213 case DW_TAG_class_type:
11214 case DW_TAG_interface_type:
11215 case DW_TAG_structure_type:
11216 case DW_TAG_union_type:
11217 this_type = read_structure_type (die, cu);
11219 case DW_TAG_enumeration_type:
11220 this_type = read_enumeration_type (die, cu);
11222 case DW_TAG_subprogram:
11223 case DW_TAG_subroutine_type:
11224 case DW_TAG_inlined_subroutine:
11225 this_type = read_subroutine_type (die, cu);
11227 case DW_TAG_array_type:
11228 this_type = read_array_type (die, cu);
11230 case DW_TAG_set_type:
11231 this_type = read_set_type (die, cu);
11233 case DW_TAG_pointer_type:
11234 this_type = read_tag_pointer_type (die, cu);
11236 case DW_TAG_ptr_to_member_type:
11237 this_type = read_tag_ptr_to_member_type (die, cu);
11239 case DW_TAG_reference_type:
11240 this_type = read_tag_reference_type (die, cu);
11242 case DW_TAG_const_type:
11243 this_type = read_tag_const_type (die, cu);
11245 case DW_TAG_volatile_type:
11246 this_type = read_tag_volatile_type (die, cu);
11248 case DW_TAG_string_type:
11249 this_type = read_tag_string_type (die, cu);
11251 case DW_TAG_typedef:
11252 this_type = read_typedef (die, cu);
11254 case DW_TAG_subrange_type:
11255 this_type = read_subrange_type (die, cu);
11257 case DW_TAG_base_type:
11258 this_type = read_base_type (die, cu);
11260 case DW_TAG_unspecified_type:
11261 this_type = read_unspecified_type (die, cu);
11263 case DW_TAG_namespace:
11264 this_type = read_namespace_type (die, cu);
11266 case DW_TAG_module:
11267 this_type = read_module_type (die, cu);
11270 complaint (&symfile_complaints, _("unexpected tag in read_type_die: '%s'"),
11271 dwarf_tag_name (die->tag));
11278 /* Return the name of the namespace/class that DIE is defined within,
11279 or "" if we can't tell. The caller should not xfree the result.
11281 For example, if we're within the method foo() in the following
11291 then determine_prefix on foo's die will return "N::C". */
11294 determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
11296 struct die_info *parent, *spec_die;
11297 struct dwarf2_cu *spec_cu;
11298 struct type *parent_type;
11300 if (cu->language != language_cplus && cu->language != language_java
11301 && cu->language != language_fortran)
11304 /* We have to be careful in the presence of DW_AT_specification.
11305 For example, with GCC 3.4, given the code
11309 // Definition of N::foo.
11313 then we'll have a tree of DIEs like this:
11315 1: DW_TAG_compile_unit
11316 2: DW_TAG_namespace // N
11317 3: DW_TAG_subprogram // declaration of N::foo
11318 4: DW_TAG_subprogram // definition of N::foo
11319 DW_AT_specification // refers to die #3
11321 Thus, when processing die #4, we have to pretend that we're in
11322 the context of its DW_AT_specification, namely the contex of die
11325 spec_die = die_specification (die, &spec_cu);
11326 if (spec_die == NULL)
11327 parent = die->parent;
11330 parent = spec_die->parent;
11334 if (parent == NULL)
11336 else if (parent->building_fullname)
11339 const char *parent_name;
11341 /* It has been seen on RealView 2.2 built binaries,
11342 DW_TAG_template_type_param types actually _defined_ as
11343 children of the parent class:
11346 template class <class Enum> Class{};
11347 Class<enum E> class_e;
11349 1: DW_TAG_class_type (Class)
11350 2: DW_TAG_enumeration_type (E)
11351 3: DW_TAG_enumerator (enum1:0)
11352 3: DW_TAG_enumerator (enum2:1)
11354 2: DW_TAG_template_type_param
11355 DW_AT_type DW_FORM_ref_udata (E)
11357 Besides being broken debug info, it can put GDB into an
11358 infinite loop. Consider:
11360 When we're building the full name for Class<E>, we'll start
11361 at Class, and go look over its template type parameters,
11362 finding E. We'll then try to build the full name of E, and
11363 reach here. We're now trying to build the full name of E,
11364 and look over the parent DIE for containing scope. In the
11365 broken case, if we followed the parent DIE of E, we'd again
11366 find Class, and once again go look at its template type
11367 arguments, etc., etc. Simply don't consider such parent die
11368 as source-level parent of this die (it can't be, the language
11369 doesn't allow it), and break the loop here. */
11370 name = dwarf2_name (die, cu);
11371 parent_name = dwarf2_name (parent, cu);
11372 complaint (&symfile_complaints,
11373 _("template param type '%s' defined within parent '%s'"),
11374 name ? name : "<unknown>",
11375 parent_name ? parent_name : "<unknown>");
11379 switch (parent->tag)
11381 case DW_TAG_namespace:
11382 parent_type = read_type_die (parent, cu);
11383 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
11384 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
11385 Work around this problem here. */
11386 if (cu->language == language_cplus
11387 && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0)
11389 /* We give a name to even anonymous namespaces. */
11390 return TYPE_TAG_NAME (parent_type);
11391 case DW_TAG_class_type:
11392 case DW_TAG_interface_type:
11393 case DW_TAG_structure_type:
11394 case DW_TAG_union_type:
11395 case DW_TAG_module:
11396 parent_type = read_type_die (parent, cu);
11397 if (TYPE_TAG_NAME (parent_type) != NULL)
11398 return TYPE_TAG_NAME (parent_type);
11400 /* An anonymous structure is only allowed non-static data
11401 members; no typedefs, no member functions, et cetera.
11402 So it does not need a prefix. */
11405 return determine_prefix (parent, cu);
11409 /* Return a newly-allocated string formed by concatenating PREFIX and
11410 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
11411 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
11412 perform an obconcat, otherwise allocate storage for the result. The CU argument
11413 is used to determine the language and hence, the appropriate separator. */
11415 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
11418 typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
11419 int physname, struct dwarf2_cu *cu)
11421 const char *lead = "";
11424 if (suffix == NULL || suffix[0] == '\0' || prefix == NULL || prefix[0] == '\0')
11426 else if (cu->language == language_java)
11428 else if (cu->language == language_fortran && physname)
11430 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
11431 DW_AT_MIPS_linkage_name is preferred and used instead. */
11439 if (prefix == NULL)
11441 if (suffix == NULL)
11446 char *retval = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
11448 strcpy (retval, lead);
11449 strcat (retval, prefix);
11450 strcat (retval, sep);
11451 strcat (retval, suffix);
11456 /* We have an obstack. */
11457 return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL);
11461 /* Return sibling of die, NULL if no sibling. */
11463 static struct die_info *
11464 sibling_die (struct die_info *die)
11466 return die->sibling;
11469 /* Get name of a die, return NULL if not found. */
11472 dwarf2_canonicalize_name (char *name, struct dwarf2_cu *cu,
11473 struct obstack *obstack)
11475 if (name && cu->language == language_cplus)
11477 char *canon_name = cp_canonicalize_string (name);
11479 if (canon_name != NULL)
11481 if (strcmp (canon_name, name) != 0)
11482 name = obsavestring (canon_name, strlen (canon_name),
11484 xfree (canon_name);
11491 /* Get name of a die, return NULL if not found. */
11494 dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
11496 struct attribute *attr;
11498 attr = dwarf2_attr (die, DW_AT_name, cu);
11499 if (!attr || !DW_STRING (attr))
11504 case DW_TAG_compile_unit:
11505 /* Compilation units have a DW_AT_name that is a filename, not
11506 a source language identifier. */
11507 case DW_TAG_enumeration_type:
11508 case DW_TAG_enumerator:
11509 /* These tags always have simple identifiers already; no need
11510 to canonicalize them. */
11511 return DW_STRING (attr);
11513 case DW_TAG_subprogram:
11514 /* Java constructors will all be named "<init>", so return
11515 the class name when we see this special case. */
11516 if (cu->language == language_java
11517 && DW_STRING (attr) != NULL
11518 && strcmp (DW_STRING (attr), "<init>") == 0)
11520 struct dwarf2_cu *spec_cu = cu;
11521 struct die_info *spec_die;
11523 /* GCJ will output '<init>' for Java constructor names.
11524 For this special case, return the name of the parent class. */
11526 /* GCJ may output suprogram DIEs with AT_specification set.
11527 If so, use the name of the specified DIE. */
11528 spec_die = die_specification (die, &spec_cu);
11529 if (spec_die != NULL)
11530 return dwarf2_name (spec_die, spec_cu);
11535 if (die->tag == DW_TAG_class_type)
11536 return dwarf2_name (die, cu);
11538 while (die->tag != DW_TAG_compile_unit);
11542 case DW_TAG_class_type:
11543 case DW_TAG_interface_type:
11544 case DW_TAG_structure_type:
11545 case DW_TAG_union_type:
11546 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
11547 structures or unions. These were of the form "._%d" in GCC 4.1,
11548 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
11549 and GCC 4.4. We work around this problem by ignoring these. */
11550 if (strncmp (DW_STRING (attr), "._", 2) == 0
11551 || strncmp (DW_STRING (attr), "<anonymous", 10) == 0)
11559 if (!DW_STRING_IS_CANONICAL (attr))
11562 = dwarf2_canonicalize_name (DW_STRING (attr), cu,
11563 &cu->objfile->objfile_obstack);
11564 DW_STRING_IS_CANONICAL (attr) = 1;
11566 return DW_STRING (attr);
11569 /* Return the die that this die in an extension of, or NULL if there
11570 is none. *EXT_CU is the CU containing DIE on input, and the CU
11571 containing the return value on output. */
11573 static struct die_info *
11574 dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu)
11576 struct attribute *attr;
11578 attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
11582 return follow_die_ref (die, attr, ext_cu);
11585 /* Convert a DIE tag into its string name. */
11588 dwarf_tag_name (unsigned tag)
11592 case DW_TAG_padding:
11593 return "DW_TAG_padding";
11594 case DW_TAG_array_type:
11595 return "DW_TAG_array_type";
11596 case DW_TAG_class_type:
11597 return "DW_TAG_class_type";
11598 case DW_TAG_entry_point:
11599 return "DW_TAG_entry_point";
11600 case DW_TAG_enumeration_type:
11601 return "DW_TAG_enumeration_type";
11602 case DW_TAG_formal_parameter:
11603 return "DW_TAG_formal_parameter";
11604 case DW_TAG_imported_declaration:
11605 return "DW_TAG_imported_declaration";
11607 return "DW_TAG_label";
11608 case DW_TAG_lexical_block:
11609 return "DW_TAG_lexical_block";
11610 case DW_TAG_member:
11611 return "DW_TAG_member";
11612 case DW_TAG_pointer_type:
11613 return "DW_TAG_pointer_type";
11614 case DW_TAG_reference_type:
11615 return "DW_TAG_reference_type";
11616 case DW_TAG_compile_unit:
11617 return "DW_TAG_compile_unit";
11618 case DW_TAG_string_type:
11619 return "DW_TAG_string_type";
11620 case DW_TAG_structure_type:
11621 return "DW_TAG_structure_type";
11622 case DW_TAG_subroutine_type:
11623 return "DW_TAG_subroutine_type";
11624 case DW_TAG_typedef:
11625 return "DW_TAG_typedef";
11626 case DW_TAG_union_type:
11627 return "DW_TAG_union_type";
11628 case DW_TAG_unspecified_parameters:
11629 return "DW_TAG_unspecified_parameters";
11630 case DW_TAG_variant:
11631 return "DW_TAG_variant";
11632 case DW_TAG_common_block:
11633 return "DW_TAG_common_block";
11634 case DW_TAG_common_inclusion:
11635 return "DW_TAG_common_inclusion";
11636 case DW_TAG_inheritance:
11637 return "DW_TAG_inheritance";
11638 case DW_TAG_inlined_subroutine:
11639 return "DW_TAG_inlined_subroutine";
11640 case DW_TAG_module:
11641 return "DW_TAG_module";
11642 case DW_TAG_ptr_to_member_type:
11643 return "DW_TAG_ptr_to_member_type";
11644 case DW_TAG_set_type:
11645 return "DW_TAG_set_type";
11646 case DW_TAG_subrange_type:
11647 return "DW_TAG_subrange_type";
11648 case DW_TAG_with_stmt:
11649 return "DW_TAG_with_stmt";
11650 case DW_TAG_access_declaration:
11651 return "DW_TAG_access_declaration";
11652 case DW_TAG_base_type:
11653 return "DW_TAG_base_type";
11654 case DW_TAG_catch_block:
11655 return "DW_TAG_catch_block";
11656 case DW_TAG_const_type:
11657 return "DW_TAG_const_type";
11658 case DW_TAG_constant:
11659 return "DW_TAG_constant";
11660 case DW_TAG_enumerator:
11661 return "DW_TAG_enumerator";
11662 case DW_TAG_file_type:
11663 return "DW_TAG_file_type";
11664 case DW_TAG_friend:
11665 return "DW_TAG_friend";
11666 case DW_TAG_namelist:
11667 return "DW_TAG_namelist";
11668 case DW_TAG_namelist_item:
11669 return "DW_TAG_namelist_item";
11670 case DW_TAG_packed_type:
11671 return "DW_TAG_packed_type";
11672 case DW_TAG_subprogram:
11673 return "DW_TAG_subprogram";
11674 case DW_TAG_template_type_param:
11675 return "DW_TAG_template_type_param";
11676 case DW_TAG_template_value_param:
11677 return "DW_TAG_template_value_param";
11678 case DW_TAG_thrown_type:
11679 return "DW_TAG_thrown_type";
11680 case DW_TAG_try_block:
11681 return "DW_TAG_try_block";
11682 case DW_TAG_variant_part:
11683 return "DW_TAG_variant_part";
11684 case DW_TAG_variable:
11685 return "DW_TAG_variable";
11686 case DW_TAG_volatile_type:
11687 return "DW_TAG_volatile_type";
11688 case DW_TAG_dwarf_procedure:
11689 return "DW_TAG_dwarf_procedure";
11690 case DW_TAG_restrict_type:
11691 return "DW_TAG_restrict_type";
11692 case DW_TAG_interface_type:
11693 return "DW_TAG_interface_type";
11694 case DW_TAG_namespace:
11695 return "DW_TAG_namespace";
11696 case DW_TAG_imported_module:
11697 return "DW_TAG_imported_module";
11698 case DW_TAG_unspecified_type:
11699 return "DW_TAG_unspecified_type";
11700 case DW_TAG_partial_unit:
11701 return "DW_TAG_partial_unit";
11702 case DW_TAG_imported_unit:
11703 return "DW_TAG_imported_unit";
11704 case DW_TAG_condition:
11705 return "DW_TAG_condition";
11706 case DW_TAG_shared_type:
11707 return "DW_TAG_shared_type";
11708 case DW_TAG_type_unit:
11709 return "DW_TAG_type_unit";
11710 case DW_TAG_MIPS_loop:
11711 return "DW_TAG_MIPS_loop";
11712 case DW_TAG_HP_array_descriptor:
11713 return "DW_TAG_HP_array_descriptor";
11714 case DW_TAG_format_label:
11715 return "DW_TAG_format_label";
11716 case DW_TAG_function_template:
11717 return "DW_TAG_function_template";
11718 case DW_TAG_class_template:
11719 return "DW_TAG_class_template";
11720 case DW_TAG_GNU_BINCL:
11721 return "DW_TAG_GNU_BINCL";
11722 case DW_TAG_GNU_EINCL:
11723 return "DW_TAG_GNU_EINCL";
11724 case DW_TAG_upc_shared_type:
11725 return "DW_TAG_upc_shared_type";
11726 case DW_TAG_upc_strict_type:
11727 return "DW_TAG_upc_strict_type";
11728 case DW_TAG_upc_relaxed_type:
11729 return "DW_TAG_upc_relaxed_type";
11730 case DW_TAG_PGI_kanji_type:
11731 return "DW_TAG_PGI_kanji_type";
11732 case DW_TAG_PGI_interface_block:
11733 return "DW_TAG_PGI_interface_block";
11735 return "DW_TAG_<unknown>";
11739 /* Convert a DWARF attribute code into its string name. */
11742 dwarf_attr_name (unsigned attr)
11746 case DW_AT_sibling:
11747 return "DW_AT_sibling";
11748 case DW_AT_location:
11749 return "DW_AT_location";
11751 return "DW_AT_name";
11752 case DW_AT_ordering:
11753 return "DW_AT_ordering";
11754 case DW_AT_subscr_data:
11755 return "DW_AT_subscr_data";
11756 case DW_AT_byte_size:
11757 return "DW_AT_byte_size";
11758 case DW_AT_bit_offset:
11759 return "DW_AT_bit_offset";
11760 case DW_AT_bit_size:
11761 return "DW_AT_bit_size";
11762 case DW_AT_element_list:
11763 return "DW_AT_element_list";
11764 case DW_AT_stmt_list:
11765 return "DW_AT_stmt_list";
11767 return "DW_AT_low_pc";
11768 case DW_AT_high_pc:
11769 return "DW_AT_high_pc";
11770 case DW_AT_language:
11771 return "DW_AT_language";
11773 return "DW_AT_member";
11775 return "DW_AT_discr";
11776 case DW_AT_discr_value:
11777 return "DW_AT_discr_value";
11778 case DW_AT_visibility:
11779 return "DW_AT_visibility";
11781 return "DW_AT_import";
11782 case DW_AT_string_length:
11783 return "DW_AT_string_length";
11784 case DW_AT_common_reference:
11785 return "DW_AT_common_reference";
11786 case DW_AT_comp_dir:
11787 return "DW_AT_comp_dir";
11788 case DW_AT_const_value:
11789 return "DW_AT_const_value";
11790 case DW_AT_containing_type:
11791 return "DW_AT_containing_type";
11792 case DW_AT_default_value:
11793 return "DW_AT_default_value";
11795 return "DW_AT_inline";
11796 case DW_AT_is_optional:
11797 return "DW_AT_is_optional";
11798 case DW_AT_lower_bound:
11799 return "DW_AT_lower_bound";
11800 case DW_AT_producer:
11801 return "DW_AT_producer";
11802 case DW_AT_prototyped:
11803 return "DW_AT_prototyped";
11804 case DW_AT_return_addr:
11805 return "DW_AT_return_addr";
11806 case DW_AT_start_scope:
11807 return "DW_AT_start_scope";
11808 case DW_AT_bit_stride:
11809 return "DW_AT_bit_stride";
11810 case DW_AT_upper_bound:
11811 return "DW_AT_upper_bound";
11812 case DW_AT_abstract_origin:
11813 return "DW_AT_abstract_origin";
11814 case DW_AT_accessibility:
11815 return "DW_AT_accessibility";
11816 case DW_AT_address_class:
11817 return "DW_AT_address_class";
11818 case DW_AT_artificial:
11819 return "DW_AT_artificial";
11820 case DW_AT_base_types:
11821 return "DW_AT_base_types";
11822 case DW_AT_calling_convention:
11823 return "DW_AT_calling_convention";
11825 return "DW_AT_count";
11826 case DW_AT_data_member_location:
11827 return "DW_AT_data_member_location";
11828 case DW_AT_decl_column:
11829 return "DW_AT_decl_column";
11830 case DW_AT_decl_file:
11831 return "DW_AT_decl_file";
11832 case DW_AT_decl_line:
11833 return "DW_AT_decl_line";
11834 case DW_AT_declaration:
11835 return "DW_AT_declaration";
11836 case DW_AT_discr_list:
11837 return "DW_AT_discr_list";
11838 case DW_AT_encoding:
11839 return "DW_AT_encoding";
11840 case DW_AT_external:
11841 return "DW_AT_external";
11842 case DW_AT_frame_base:
11843 return "DW_AT_frame_base";
11845 return "DW_AT_friend";
11846 case DW_AT_identifier_case:
11847 return "DW_AT_identifier_case";
11848 case DW_AT_macro_info:
11849 return "DW_AT_macro_info";
11850 case DW_AT_namelist_items:
11851 return "DW_AT_namelist_items";
11852 case DW_AT_priority:
11853 return "DW_AT_priority";
11854 case DW_AT_segment:
11855 return "DW_AT_segment";
11856 case DW_AT_specification:
11857 return "DW_AT_specification";
11858 case DW_AT_static_link:
11859 return "DW_AT_static_link";
11861 return "DW_AT_type";
11862 case DW_AT_use_location:
11863 return "DW_AT_use_location";
11864 case DW_AT_variable_parameter:
11865 return "DW_AT_variable_parameter";
11866 case DW_AT_virtuality:
11867 return "DW_AT_virtuality";
11868 case DW_AT_vtable_elem_location:
11869 return "DW_AT_vtable_elem_location";
11870 /* DWARF 3 values. */
11871 case DW_AT_allocated:
11872 return "DW_AT_allocated";
11873 case DW_AT_associated:
11874 return "DW_AT_associated";
11875 case DW_AT_data_location:
11876 return "DW_AT_data_location";
11877 case DW_AT_byte_stride:
11878 return "DW_AT_byte_stride";
11879 case DW_AT_entry_pc:
11880 return "DW_AT_entry_pc";
11881 case DW_AT_use_UTF8:
11882 return "DW_AT_use_UTF8";
11883 case DW_AT_extension:
11884 return "DW_AT_extension";
11886 return "DW_AT_ranges";
11887 case DW_AT_trampoline:
11888 return "DW_AT_trampoline";
11889 case DW_AT_call_column:
11890 return "DW_AT_call_column";
11891 case DW_AT_call_file:
11892 return "DW_AT_call_file";
11893 case DW_AT_call_line:
11894 return "DW_AT_call_line";
11895 case DW_AT_description:
11896 return "DW_AT_description";
11897 case DW_AT_binary_scale:
11898 return "DW_AT_binary_scale";
11899 case DW_AT_decimal_scale:
11900 return "DW_AT_decimal_scale";
11902 return "DW_AT_small";
11903 case DW_AT_decimal_sign:
11904 return "DW_AT_decimal_sign";
11905 case DW_AT_digit_count:
11906 return "DW_AT_digit_count";
11907 case DW_AT_picture_string:
11908 return "DW_AT_picture_string";
11909 case DW_AT_mutable:
11910 return "DW_AT_mutable";
11911 case DW_AT_threads_scaled:
11912 return "DW_AT_threads_scaled";
11913 case DW_AT_explicit:
11914 return "DW_AT_explicit";
11915 case DW_AT_object_pointer:
11916 return "DW_AT_object_pointer";
11917 case DW_AT_endianity:
11918 return "DW_AT_endianity";
11919 case DW_AT_elemental:
11920 return "DW_AT_elemental";
11922 return "DW_AT_pure";
11923 case DW_AT_recursive:
11924 return "DW_AT_recursive";
11925 /* DWARF 4 values. */
11926 case DW_AT_signature:
11927 return "DW_AT_signature";
11928 case DW_AT_linkage_name:
11929 return "DW_AT_linkage_name";
11930 /* SGI/MIPS extensions. */
11931 #ifdef MIPS /* collides with DW_AT_HP_block_index */
11932 case DW_AT_MIPS_fde:
11933 return "DW_AT_MIPS_fde";
11935 case DW_AT_MIPS_loop_begin:
11936 return "DW_AT_MIPS_loop_begin";
11937 case DW_AT_MIPS_tail_loop_begin:
11938 return "DW_AT_MIPS_tail_loop_begin";
11939 case DW_AT_MIPS_epilog_begin:
11940 return "DW_AT_MIPS_epilog_begin";
11941 case DW_AT_MIPS_loop_unroll_factor:
11942 return "DW_AT_MIPS_loop_unroll_factor";
11943 case DW_AT_MIPS_software_pipeline_depth:
11944 return "DW_AT_MIPS_software_pipeline_depth";
11945 case DW_AT_MIPS_linkage_name:
11946 return "DW_AT_MIPS_linkage_name";
11947 case DW_AT_MIPS_stride:
11948 return "DW_AT_MIPS_stride";
11949 case DW_AT_MIPS_abstract_name:
11950 return "DW_AT_MIPS_abstract_name";
11951 case DW_AT_MIPS_clone_origin:
11952 return "DW_AT_MIPS_clone_origin";
11953 case DW_AT_MIPS_has_inlines:
11954 return "DW_AT_MIPS_has_inlines";
11955 /* HP extensions. */
11956 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
11957 case DW_AT_HP_block_index:
11958 return "DW_AT_HP_block_index";
11960 case DW_AT_HP_unmodifiable:
11961 return "DW_AT_HP_unmodifiable";
11962 case DW_AT_HP_actuals_stmt_list:
11963 return "DW_AT_HP_actuals_stmt_list";
11964 case DW_AT_HP_proc_per_section:
11965 return "DW_AT_HP_proc_per_section";
11966 case DW_AT_HP_raw_data_ptr:
11967 return "DW_AT_HP_raw_data_ptr";
11968 case DW_AT_HP_pass_by_reference:
11969 return "DW_AT_HP_pass_by_reference";
11970 case DW_AT_HP_opt_level:
11971 return "DW_AT_HP_opt_level";
11972 case DW_AT_HP_prof_version_id:
11973 return "DW_AT_HP_prof_version_id";
11974 case DW_AT_HP_opt_flags:
11975 return "DW_AT_HP_opt_flags";
11976 case DW_AT_HP_cold_region_low_pc:
11977 return "DW_AT_HP_cold_region_low_pc";
11978 case DW_AT_HP_cold_region_high_pc:
11979 return "DW_AT_HP_cold_region_high_pc";
11980 case DW_AT_HP_all_variables_modifiable:
11981 return "DW_AT_HP_all_variables_modifiable";
11982 case DW_AT_HP_linkage_name:
11983 return "DW_AT_HP_linkage_name";
11984 case DW_AT_HP_prof_flags:
11985 return "DW_AT_HP_prof_flags";
11986 /* GNU extensions. */
11987 case DW_AT_sf_names:
11988 return "DW_AT_sf_names";
11989 case DW_AT_src_info:
11990 return "DW_AT_src_info";
11991 case DW_AT_mac_info:
11992 return "DW_AT_mac_info";
11993 case DW_AT_src_coords:
11994 return "DW_AT_src_coords";
11995 case DW_AT_body_begin:
11996 return "DW_AT_body_begin";
11997 case DW_AT_body_end:
11998 return "DW_AT_body_end";
11999 case DW_AT_GNU_vector:
12000 return "DW_AT_GNU_vector";
12001 case DW_AT_GNU_odr_signature:
12002 return "DW_AT_GNU_odr_signature";
12003 /* VMS extensions. */
12004 case DW_AT_VMS_rtnbeg_pd_address:
12005 return "DW_AT_VMS_rtnbeg_pd_address";
12006 /* UPC extension. */
12007 case DW_AT_upc_threads_scaled:
12008 return "DW_AT_upc_threads_scaled";
12009 /* PGI (STMicroelectronics) extensions. */
12010 case DW_AT_PGI_lbase:
12011 return "DW_AT_PGI_lbase";
12012 case DW_AT_PGI_soffset:
12013 return "DW_AT_PGI_soffset";
12014 case DW_AT_PGI_lstride:
12015 return "DW_AT_PGI_lstride";
12017 return "DW_AT_<unknown>";
12021 /* Convert a DWARF value form code into its string name. */
12024 dwarf_form_name (unsigned form)
12029 return "DW_FORM_addr";
12030 case DW_FORM_block2:
12031 return "DW_FORM_block2";
12032 case DW_FORM_block4:
12033 return "DW_FORM_block4";
12034 case DW_FORM_data2:
12035 return "DW_FORM_data2";
12036 case DW_FORM_data4:
12037 return "DW_FORM_data4";
12038 case DW_FORM_data8:
12039 return "DW_FORM_data8";
12040 case DW_FORM_string:
12041 return "DW_FORM_string";
12042 case DW_FORM_block:
12043 return "DW_FORM_block";
12044 case DW_FORM_block1:
12045 return "DW_FORM_block1";
12046 case DW_FORM_data1:
12047 return "DW_FORM_data1";
12049 return "DW_FORM_flag";
12050 case DW_FORM_sdata:
12051 return "DW_FORM_sdata";
12053 return "DW_FORM_strp";
12054 case DW_FORM_udata:
12055 return "DW_FORM_udata";
12056 case DW_FORM_ref_addr:
12057 return "DW_FORM_ref_addr";
12059 return "DW_FORM_ref1";
12061 return "DW_FORM_ref2";
12063 return "DW_FORM_ref4";
12065 return "DW_FORM_ref8";
12066 case DW_FORM_ref_udata:
12067 return "DW_FORM_ref_udata";
12068 case DW_FORM_indirect:
12069 return "DW_FORM_indirect";
12070 case DW_FORM_sec_offset:
12071 return "DW_FORM_sec_offset";
12072 case DW_FORM_exprloc:
12073 return "DW_FORM_exprloc";
12074 case DW_FORM_flag_present:
12075 return "DW_FORM_flag_present";
12077 return "DW_FORM_sig8";
12079 return "DW_FORM_<unknown>";
12083 /* Convert a DWARF stack opcode into its string name. */
12086 dwarf_stack_op_name (unsigned op, int def)
12091 return "DW_OP_addr";
12093 return "DW_OP_deref";
12094 case DW_OP_const1u:
12095 return "DW_OP_const1u";
12096 case DW_OP_const1s:
12097 return "DW_OP_const1s";
12098 case DW_OP_const2u:
12099 return "DW_OP_const2u";
12100 case DW_OP_const2s:
12101 return "DW_OP_const2s";
12102 case DW_OP_const4u:
12103 return "DW_OP_const4u";
12104 case DW_OP_const4s:
12105 return "DW_OP_const4s";
12106 case DW_OP_const8u:
12107 return "DW_OP_const8u";
12108 case DW_OP_const8s:
12109 return "DW_OP_const8s";
12111 return "DW_OP_constu";
12113 return "DW_OP_consts";
12115 return "DW_OP_dup";
12117 return "DW_OP_drop";
12119 return "DW_OP_over";
12121 return "DW_OP_pick";
12123 return "DW_OP_swap";
12125 return "DW_OP_rot";
12127 return "DW_OP_xderef";
12129 return "DW_OP_abs";
12131 return "DW_OP_and";
12133 return "DW_OP_div";
12135 return "DW_OP_minus";
12137 return "DW_OP_mod";
12139 return "DW_OP_mul";
12141 return "DW_OP_neg";
12143 return "DW_OP_not";
12147 return "DW_OP_plus";
12148 case DW_OP_plus_uconst:
12149 return "DW_OP_plus_uconst";
12151 return "DW_OP_shl";
12153 return "DW_OP_shr";
12155 return "DW_OP_shra";
12157 return "DW_OP_xor";
12159 return "DW_OP_bra";
12173 return "DW_OP_skip";
12175 return "DW_OP_lit0";
12177 return "DW_OP_lit1";
12179 return "DW_OP_lit2";
12181 return "DW_OP_lit3";
12183 return "DW_OP_lit4";
12185 return "DW_OP_lit5";
12187 return "DW_OP_lit6";
12189 return "DW_OP_lit7";
12191 return "DW_OP_lit8";
12193 return "DW_OP_lit9";
12195 return "DW_OP_lit10";
12197 return "DW_OP_lit11";
12199 return "DW_OP_lit12";
12201 return "DW_OP_lit13";
12203 return "DW_OP_lit14";
12205 return "DW_OP_lit15";
12207 return "DW_OP_lit16";
12209 return "DW_OP_lit17";
12211 return "DW_OP_lit18";
12213 return "DW_OP_lit19";
12215 return "DW_OP_lit20";
12217 return "DW_OP_lit21";
12219 return "DW_OP_lit22";
12221 return "DW_OP_lit23";
12223 return "DW_OP_lit24";
12225 return "DW_OP_lit25";
12227 return "DW_OP_lit26";
12229 return "DW_OP_lit27";
12231 return "DW_OP_lit28";
12233 return "DW_OP_lit29";
12235 return "DW_OP_lit30";
12237 return "DW_OP_lit31";
12239 return "DW_OP_reg0";
12241 return "DW_OP_reg1";
12243 return "DW_OP_reg2";
12245 return "DW_OP_reg3";
12247 return "DW_OP_reg4";
12249 return "DW_OP_reg5";
12251 return "DW_OP_reg6";
12253 return "DW_OP_reg7";
12255 return "DW_OP_reg8";
12257 return "DW_OP_reg9";
12259 return "DW_OP_reg10";
12261 return "DW_OP_reg11";
12263 return "DW_OP_reg12";
12265 return "DW_OP_reg13";
12267 return "DW_OP_reg14";
12269 return "DW_OP_reg15";
12271 return "DW_OP_reg16";
12273 return "DW_OP_reg17";
12275 return "DW_OP_reg18";
12277 return "DW_OP_reg19";
12279 return "DW_OP_reg20";
12281 return "DW_OP_reg21";
12283 return "DW_OP_reg22";
12285 return "DW_OP_reg23";
12287 return "DW_OP_reg24";
12289 return "DW_OP_reg25";
12291 return "DW_OP_reg26";
12293 return "DW_OP_reg27";
12295 return "DW_OP_reg28";
12297 return "DW_OP_reg29";
12299 return "DW_OP_reg30";
12301 return "DW_OP_reg31";
12303 return "DW_OP_breg0";
12305 return "DW_OP_breg1";
12307 return "DW_OP_breg2";
12309 return "DW_OP_breg3";
12311 return "DW_OP_breg4";
12313 return "DW_OP_breg5";
12315 return "DW_OP_breg6";
12317 return "DW_OP_breg7";
12319 return "DW_OP_breg8";
12321 return "DW_OP_breg9";
12323 return "DW_OP_breg10";
12325 return "DW_OP_breg11";
12327 return "DW_OP_breg12";
12329 return "DW_OP_breg13";
12331 return "DW_OP_breg14";
12333 return "DW_OP_breg15";
12335 return "DW_OP_breg16";
12337 return "DW_OP_breg17";
12339 return "DW_OP_breg18";
12341 return "DW_OP_breg19";
12343 return "DW_OP_breg20";
12345 return "DW_OP_breg21";
12347 return "DW_OP_breg22";
12349 return "DW_OP_breg23";
12351 return "DW_OP_breg24";
12353 return "DW_OP_breg25";
12355 return "DW_OP_breg26";
12357 return "DW_OP_breg27";
12359 return "DW_OP_breg28";
12361 return "DW_OP_breg29";
12363 return "DW_OP_breg30";
12365 return "DW_OP_breg31";
12367 return "DW_OP_regx";
12369 return "DW_OP_fbreg";
12371 return "DW_OP_bregx";
12373 return "DW_OP_piece";
12374 case DW_OP_deref_size:
12375 return "DW_OP_deref_size";
12376 case DW_OP_xderef_size:
12377 return "DW_OP_xderef_size";
12379 return "DW_OP_nop";
12380 /* DWARF 3 extensions. */
12381 case DW_OP_push_object_address:
12382 return "DW_OP_push_object_address";
12384 return "DW_OP_call2";
12386 return "DW_OP_call4";
12387 case DW_OP_call_ref:
12388 return "DW_OP_call_ref";
12389 case DW_OP_form_tls_address:
12390 return "DW_OP_form_tls_address";
12391 case DW_OP_call_frame_cfa:
12392 return "DW_OP_call_frame_cfa";
12393 case DW_OP_bit_piece:
12394 return "DW_OP_bit_piece";
12395 /* DWARF 4 extensions. */
12396 case DW_OP_implicit_value:
12397 return "DW_OP_implicit_value";
12398 case DW_OP_stack_value:
12399 return "DW_OP_stack_value";
12400 /* GNU extensions. */
12401 case DW_OP_GNU_push_tls_address:
12402 return "DW_OP_GNU_push_tls_address";
12403 case DW_OP_GNU_uninit:
12404 return "DW_OP_GNU_uninit";
12406 return def ? "OP_<unknown>" : NULL;
12411 dwarf_bool_name (unsigned mybool)
12419 /* Convert a DWARF type code into its string name. */
12422 dwarf_type_encoding_name (unsigned enc)
12427 return "DW_ATE_void";
12428 case DW_ATE_address:
12429 return "DW_ATE_address";
12430 case DW_ATE_boolean:
12431 return "DW_ATE_boolean";
12432 case DW_ATE_complex_float:
12433 return "DW_ATE_complex_float";
12435 return "DW_ATE_float";
12436 case DW_ATE_signed:
12437 return "DW_ATE_signed";
12438 case DW_ATE_signed_char:
12439 return "DW_ATE_signed_char";
12440 case DW_ATE_unsigned:
12441 return "DW_ATE_unsigned";
12442 case DW_ATE_unsigned_char:
12443 return "DW_ATE_unsigned_char";
12445 case DW_ATE_imaginary_float:
12446 return "DW_ATE_imaginary_float";
12447 case DW_ATE_packed_decimal:
12448 return "DW_ATE_packed_decimal";
12449 case DW_ATE_numeric_string:
12450 return "DW_ATE_numeric_string";
12451 case DW_ATE_edited:
12452 return "DW_ATE_edited";
12453 case DW_ATE_signed_fixed:
12454 return "DW_ATE_signed_fixed";
12455 case DW_ATE_unsigned_fixed:
12456 return "DW_ATE_unsigned_fixed";
12457 case DW_ATE_decimal_float:
12458 return "DW_ATE_decimal_float";
12461 return "DW_ATE_UTF";
12462 /* HP extensions. */
12463 case DW_ATE_HP_float80:
12464 return "DW_ATE_HP_float80";
12465 case DW_ATE_HP_complex_float80:
12466 return "DW_ATE_HP_complex_float80";
12467 case DW_ATE_HP_float128:
12468 return "DW_ATE_HP_float128";
12469 case DW_ATE_HP_complex_float128:
12470 return "DW_ATE_HP_complex_float128";
12471 case DW_ATE_HP_floathpintel:
12472 return "DW_ATE_HP_floathpintel";
12473 case DW_ATE_HP_imaginary_float80:
12474 return "DW_ATE_HP_imaginary_float80";
12475 case DW_ATE_HP_imaginary_float128:
12476 return "DW_ATE_HP_imaginary_float128";
12478 return "DW_ATE_<unknown>";
12482 /* Convert a DWARF call frame info operation to its string name. */
12486 dwarf_cfi_name (unsigned cfi_opc)
12490 case DW_CFA_advance_loc:
12491 return "DW_CFA_advance_loc";
12492 case DW_CFA_offset:
12493 return "DW_CFA_offset";
12494 case DW_CFA_restore:
12495 return "DW_CFA_restore";
12497 return "DW_CFA_nop";
12498 case DW_CFA_set_loc:
12499 return "DW_CFA_set_loc";
12500 case DW_CFA_advance_loc1:
12501 return "DW_CFA_advance_loc1";
12502 case DW_CFA_advance_loc2:
12503 return "DW_CFA_advance_loc2";
12504 case DW_CFA_advance_loc4:
12505 return "DW_CFA_advance_loc4";
12506 case DW_CFA_offset_extended:
12507 return "DW_CFA_offset_extended";
12508 case DW_CFA_restore_extended:
12509 return "DW_CFA_restore_extended";
12510 case DW_CFA_undefined:
12511 return "DW_CFA_undefined";
12512 case DW_CFA_same_value:
12513 return "DW_CFA_same_value";
12514 case DW_CFA_register:
12515 return "DW_CFA_register";
12516 case DW_CFA_remember_state:
12517 return "DW_CFA_remember_state";
12518 case DW_CFA_restore_state:
12519 return "DW_CFA_restore_state";
12520 case DW_CFA_def_cfa:
12521 return "DW_CFA_def_cfa";
12522 case DW_CFA_def_cfa_register:
12523 return "DW_CFA_def_cfa_register";
12524 case DW_CFA_def_cfa_offset:
12525 return "DW_CFA_def_cfa_offset";
12527 case DW_CFA_def_cfa_expression:
12528 return "DW_CFA_def_cfa_expression";
12529 case DW_CFA_expression:
12530 return "DW_CFA_expression";
12531 case DW_CFA_offset_extended_sf:
12532 return "DW_CFA_offset_extended_sf";
12533 case DW_CFA_def_cfa_sf:
12534 return "DW_CFA_def_cfa_sf";
12535 case DW_CFA_def_cfa_offset_sf:
12536 return "DW_CFA_def_cfa_offset_sf";
12537 case DW_CFA_val_offset:
12538 return "DW_CFA_val_offset";
12539 case DW_CFA_val_offset_sf:
12540 return "DW_CFA_val_offset_sf";
12541 case DW_CFA_val_expression:
12542 return "DW_CFA_val_expression";
12543 /* SGI/MIPS specific. */
12544 case DW_CFA_MIPS_advance_loc8:
12545 return "DW_CFA_MIPS_advance_loc8";
12546 /* GNU extensions. */
12547 case DW_CFA_GNU_window_save:
12548 return "DW_CFA_GNU_window_save";
12549 case DW_CFA_GNU_args_size:
12550 return "DW_CFA_GNU_args_size";
12551 case DW_CFA_GNU_negative_offset_extended:
12552 return "DW_CFA_GNU_negative_offset_extended";
12554 return "DW_CFA_<unknown>";
12560 dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
12564 print_spaces (indent, f);
12565 fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n",
12566 dwarf_tag_name (die->tag), die->abbrev, die->offset);
12568 if (die->parent != NULL)
12570 print_spaces (indent, f);
12571 fprintf_unfiltered (f, " parent at offset: 0x%x\n",
12572 die->parent->offset);
12575 print_spaces (indent, f);
12576 fprintf_unfiltered (f, " has children: %s\n",
12577 dwarf_bool_name (die->child != NULL));
12579 print_spaces (indent, f);
12580 fprintf_unfiltered (f, " attributes:\n");
12582 for (i = 0; i < die->num_attrs; ++i)
12584 print_spaces (indent, f);
12585 fprintf_unfiltered (f, " %s (%s) ",
12586 dwarf_attr_name (die->attrs[i].name),
12587 dwarf_form_name (die->attrs[i].form));
12589 switch (die->attrs[i].form)
12591 case DW_FORM_ref_addr:
12593 fprintf_unfiltered (f, "address: ");
12594 fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f);
12596 case DW_FORM_block2:
12597 case DW_FORM_block4:
12598 case DW_FORM_block:
12599 case DW_FORM_block1:
12600 fprintf_unfiltered (f, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
12602 case DW_FORM_exprloc:
12603 fprintf_unfiltered (f, "expression: size %u",
12604 DW_BLOCK (&die->attrs[i])->size);
12609 fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)",
12610 (long) (DW_ADDR (&die->attrs[i])));
12612 case DW_FORM_data1:
12613 case DW_FORM_data2:
12614 case DW_FORM_data4:
12615 case DW_FORM_data8:
12616 case DW_FORM_udata:
12617 case DW_FORM_sdata:
12618 fprintf_unfiltered (f, "constant: %s",
12619 pulongest (DW_UNSND (&die->attrs[i])));
12621 case DW_FORM_sec_offset:
12622 fprintf_unfiltered (f, "section offset: %s",
12623 pulongest (DW_UNSND (&die->attrs[i])));
12626 if (DW_SIGNATURED_TYPE (&die->attrs[i]) != NULL)
12627 fprintf_unfiltered (f, "signatured type, offset: 0x%x",
12628 DW_SIGNATURED_TYPE (&die->attrs[i])->offset);
12630 fprintf_unfiltered (f, "signatured type, offset: unknown");
12632 case DW_FORM_string:
12634 fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)",
12635 DW_STRING (&die->attrs[i])
12636 ? DW_STRING (&die->attrs[i]) : "",
12637 DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not");
12640 if (DW_UNSND (&die->attrs[i]))
12641 fprintf_unfiltered (f, "flag: TRUE");
12643 fprintf_unfiltered (f, "flag: FALSE");
12645 case DW_FORM_flag_present:
12646 fprintf_unfiltered (f, "flag: TRUE");
12648 case DW_FORM_indirect:
12649 /* the reader will have reduced the indirect form to
12650 the "base form" so this form should not occur */
12651 fprintf_unfiltered (f, "unexpected attribute form: DW_FORM_indirect");
12654 fprintf_unfiltered (f, "unsupported attribute form: %d.",
12655 die->attrs[i].form);
12658 fprintf_unfiltered (f, "\n");
12663 dump_die_for_error (struct die_info *die)
12665 dump_die_shallow (gdb_stderr, 0, die);
12669 dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die)
12671 int indent = level * 4;
12673 gdb_assert (die != NULL);
12675 if (level >= max_level)
12678 dump_die_shallow (f, indent, die);
12680 if (die->child != NULL)
12682 print_spaces (indent, f);
12683 fprintf_unfiltered (f, " Children:");
12684 if (level + 1 < max_level)
12686 fprintf_unfiltered (f, "\n");
12687 dump_die_1 (f, level + 1, max_level, die->child);
12691 fprintf_unfiltered (f, " [not printed, max nesting level reached]\n");
12695 if (die->sibling != NULL && level > 0)
12697 dump_die_1 (f, level, max_level, die->sibling);
12701 /* This is called from the pdie macro in gdbinit.in.
12702 It's not static so gcc will keep a copy callable from gdb. */
12705 dump_die (struct die_info *die, int max_level)
12707 dump_die_1 (gdb_stdlog, 0, max_level, die);
12711 store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu)
12715 slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset, INSERT);
12721 is_ref_attr (struct attribute *attr)
12723 switch (attr->form)
12725 case DW_FORM_ref_addr:
12730 case DW_FORM_ref_udata:
12737 static unsigned int
12738 dwarf2_get_ref_die_offset (struct attribute *attr)
12740 if (is_ref_attr (attr))
12741 return DW_ADDR (attr);
12743 complaint (&symfile_complaints,
12744 _("unsupported die ref attribute form: '%s'"),
12745 dwarf_form_name (attr->form));
12749 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
12750 * the value held by the attribute is not constant. */
12753 dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
12755 if (attr->form == DW_FORM_sdata)
12756 return DW_SND (attr);
12757 else if (attr->form == DW_FORM_udata
12758 || attr->form == DW_FORM_data1
12759 || attr->form == DW_FORM_data2
12760 || attr->form == DW_FORM_data4
12761 || attr->form == DW_FORM_data8)
12762 return DW_UNSND (attr);
12765 complaint (&symfile_complaints, _("Attribute value is not a constant (%s)"),
12766 dwarf_form_name (attr->form));
12767 return default_value;
12771 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
12772 unit and add it to our queue.
12773 The result is non-zero if PER_CU was queued, otherwise the result is zero
12774 meaning either PER_CU is already queued or it is already loaded. */
12777 maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
12778 struct dwarf2_per_cu_data *per_cu)
12780 /* We may arrive here during partial symbol reading, if we need full
12781 DIEs to process an unusual case (e.g. template arguments). Do
12782 not queue PER_CU, just tell our caller to load its DIEs. */
12783 if (dwarf2_per_objfile->reading_partial_symbols)
12785 if (per_cu->cu == NULL || per_cu->cu->dies == NULL)
12790 /* Mark the dependence relation so that we don't flush PER_CU
12792 dwarf2_add_dependence (this_cu, per_cu);
12794 /* If it's already on the queue, we have nothing to do. */
12795 if (per_cu->queued)
12798 /* If the compilation unit is already loaded, just mark it as
12800 if (per_cu->cu != NULL)
12802 per_cu->cu->last_used = 0;
12806 /* Add it to the queue. */
12807 queue_comp_unit (per_cu, this_cu->objfile);
12812 /* Follow reference or signature attribute ATTR of SRC_DIE.
12813 On entry *REF_CU is the CU of SRC_DIE.
12814 On exit *REF_CU is the CU of the result. */
12816 static struct die_info *
12817 follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr,
12818 struct dwarf2_cu **ref_cu)
12820 struct die_info *die;
12822 if (is_ref_attr (attr))
12823 die = follow_die_ref (src_die, attr, ref_cu);
12824 else if (attr->form == DW_FORM_sig8)
12825 die = follow_die_sig (src_die, attr, ref_cu);
12828 dump_die_for_error (src_die);
12829 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
12830 (*ref_cu)->objfile->name);
12836 /* Follow reference OFFSET.
12837 On entry *REF_CU is the CU of the source die referencing OFFSET.
12838 On exit *REF_CU is the CU of the result.
12839 Returns NULL if OFFSET is invalid. */
12841 static struct die_info *
12842 follow_die_offset (unsigned int offset, struct dwarf2_cu **ref_cu)
12844 struct die_info temp_die;
12845 struct dwarf2_cu *target_cu, *cu = *ref_cu;
12847 gdb_assert (cu->per_cu != NULL);
12851 if (cu->per_cu->from_debug_types)
12853 /* .debug_types CUs cannot reference anything outside their CU.
12854 If they need to, they have to reference a signatured type via
12856 if (! offset_in_cu_p (&cu->header, offset))
12859 else if (! offset_in_cu_p (&cu->header, offset))
12861 struct dwarf2_per_cu_data *per_cu;
12863 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
12865 /* If necessary, add it to the queue and load its DIEs. */
12866 if (maybe_queue_comp_unit (cu, per_cu))
12867 load_full_comp_unit (per_cu, cu->objfile);
12869 target_cu = per_cu->cu;
12871 else if (cu->dies == NULL)
12873 /* We're loading full DIEs during partial symbol reading. */
12874 gdb_assert (dwarf2_per_objfile->reading_partial_symbols);
12875 load_full_comp_unit (cu->per_cu, cu->objfile);
12878 *ref_cu = target_cu;
12879 temp_die.offset = offset;
12880 return htab_find_with_hash (target_cu->die_hash, &temp_die, offset);
12883 /* Follow reference attribute ATTR of SRC_DIE.
12884 On entry *REF_CU is the CU of SRC_DIE.
12885 On exit *REF_CU is the CU of the result. */
12887 static struct die_info *
12888 follow_die_ref (struct die_info *src_die, struct attribute *attr,
12889 struct dwarf2_cu **ref_cu)
12891 unsigned int offset = dwarf2_get_ref_die_offset (attr);
12892 struct dwarf2_cu *cu = *ref_cu;
12893 struct die_info *die;
12895 die = follow_die_offset (offset, ref_cu);
12897 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
12898 "at 0x%x [in module %s]"),
12899 offset, src_die->offset, cu->objfile->name);
12904 /* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
12905 value is intended for DW_OP_call*. */
12907 struct dwarf2_locexpr_baton
12908 dwarf2_fetch_die_location_block (unsigned int offset,
12909 struct dwarf2_per_cu_data *per_cu)
12911 struct dwarf2_cu *cu = per_cu->cu;
12912 struct die_info *die;
12913 struct attribute *attr;
12914 struct dwarf2_locexpr_baton retval;
12916 die = follow_die_offset (offset, &cu);
12918 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
12919 offset, per_cu->cu->objfile->name);
12921 attr = dwarf2_attr (die, DW_AT_location, cu);
12924 /* DWARF: "If there is no such attribute, then there is no effect.". */
12926 retval.data = NULL;
12931 if (!attr_form_is_block (attr))
12932 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
12933 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
12934 offset, per_cu->cu->objfile->name);
12936 retval.data = DW_BLOCK (attr)->data;
12937 retval.size = DW_BLOCK (attr)->size;
12939 retval.per_cu = cu->per_cu;
12943 /* Follow the signature attribute ATTR in SRC_DIE.
12944 On entry *REF_CU is the CU of SRC_DIE.
12945 On exit *REF_CU is the CU of the result. */
12947 static struct die_info *
12948 follow_die_sig (struct die_info *src_die, struct attribute *attr,
12949 struct dwarf2_cu **ref_cu)
12951 struct objfile *objfile = (*ref_cu)->objfile;
12952 struct die_info temp_die;
12953 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
12954 struct dwarf2_cu *sig_cu;
12955 struct die_info *die;
12957 /* sig_type will be NULL if the signatured type is missing from
12959 if (sig_type == NULL)
12960 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
12961 "at 0x%x [in module %s]"),
12962 src_die->offset, objfile->name);
12964 /* If necessary, add it to the queue and load its DIEs. */
12966 if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu))
12967 read_signatured_type (objfile, sig_type);
12969 gdb_assert (sig_type->per_cu.cu != NULL);
12971 sig_cu = sig_type->per_cu.cu;
12972 temp_die.offset = sig_cu->header.offset + sig_type->type_offset;
12973 die = htab_find_with_hash (sig_cu->die_hash, &temp_die, temp_die.offset);
12980 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
12981 "at 0x%x [in module %s]"),
12982 sig_type->type_offset, src_die->offset, objfile->name);
12985 /* Given an offset of a signatured type, return its signatured_type. */
12987 static struct signatured_type *
12988 lookup_signatured_type_at_offset (struct objfile *objfile, unsigned int offset)
12990 gdb_byte *info_ptr = dwarf2_per_objfile->types.buffer + offset;
12991 unsigned int length, initial_length_size;
12992 unsigned int sig_offset;
12993 struct signatured_type find_entry, *type_sig;
12995 length = read_initial_length (objfile->obfd, info_ptr, &initial_length_size);
12996 sig_offset = (initial_length_size
12998 + (initial_length_size == 4 ? 4 : 8) /*debug_abbrev_offset*/
12999 + 1 /*address_size*/);
13000 find_entry.signature = bfd_get_64 (objfile->obfd, info_ptr + sig_offset);
13001 type_sig = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
13003 /* This is only used to lookup previously recorded types.
13004 If we didn't find it, it's our bug. */
13005 gdb_assert (type_sig != NULL);
13006 gdb_assert (offset == type_sig->offset);
13011 /* Read in signatured type at OFFSET and build its CU and die(s). */
13014 read_signatured_type_at_offset (struct objfile *objfile,
13015 unsigned int offset)
13017 struct signatured_type *type_sig;
13019 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
13021 /* We have the section offset, but we need the signature to do the
13022 hash table lookup. */
13023 type_sig = lookup_signatured_type_at_offset (objfile, offset);
13025 gdb_assert (type_sig->per_cu.cu == NULL);
13027 read_signatured_type (objfile, type_sig);
13029 gdb_assert (type_sig->per_cu.cu != NULL);
13032 /* Read in a signatured type and build its CU and DIEs. */
13035 read_signatured_type (struct objfile *objfile,
13036 struct signatured_type *type_sig)
13038 gdb_byte *types_ptr;
13039 struct die_reader_specs reader_specs;
13040 struct dwarf2_cu *cu;
13041 ULONGEST signature;
13042 struct cleanup *back_to, *free_cu_cleanup;
13043 struct attribute *attr;
13045 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
13046 types_ptr = dwarf2_per_objfile->types.buffer + type_sig->offset;
13048 gdb_assert (type_sig->per_cu.cu == NULL);
13050 cu = xmalloc (sizeof (struct dwarf2_cu));
13051 memset (cu, 0, sizeof (struct dwarf2_cu));
13052 obstack_init (&cu->comp_unit_obstack);
13053 cu->objfile = objfile;
13054 type_sig->per_cu.cu = cu;
13055 cu->per_cu = &type_sig->per_cu;
13057 /* If an error occurs while loading, release our storage. */
13058 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
13060 types_ptr = read_type_comp_unit_head (&cu->header, &signature,
13061 types_ptr, objfile->obfd);
13062 gdb_assert (signature == type_sig->signature);
13065 = htab_create_alloc_ex (cu->header.length / 12,
13069 &cu->comp_unit_obstack,
13070 hashtab_obstack_allocate,
13071 dummy_obstack_deallocate);
13073 dwarf2_read_abbrevs (cu->objfile->obfd, cu);
13074 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
13076 init_cu_die_reader (&reader_specs, cu);
13078 cu->dies = read_die_and_children (&reader_specs, types_ptr, &types_ptr,
13081 /* We try not to read any attributes in this function, because not
13082 all objfiles needed for references have been loaded yet, and symbol
13083 table processing isn't initialized. But we have to set the CU language,
13084 or we won't be able to build types correctly. */
13085 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
13087 set_cu_language (DW_UNSND (attr), cu);
13089 set_cu_language (language_minimal, cu);
13091 do_cleanups (back_to);
13093 /* We've successfully allocated this compilation unit. Let our caller
13094 clean it up when finished with it. */
13095 discard_cleanups (free_cu_cleanup);
13097 type_sig->per_cu.cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
13098 dwarf2_per_objfile->read_in_chain = &type_sig->per_cu;
13101 /* Decode simple location descriptions.
13102 Given a pointer to a dwarf block that defines a location, compute
13103 the location and return the value.
13105 NOTE drow/2003-11-18: This function is called in two situations
13106 now: for the address of static or global variables (partial symbols
13107 only) and for offsets into structures which are expected to be
13108 (more or less) constant. The partial symbol case should go away,
13109 and only the constant case should remain. That will let this
13110 function complain more accurately. A few special modes are allowed
13111 without complaint for global variables (for instance, global
13112 register values and thread-local values).
13114 A location description containing no operations indicates that the
13115 object is optimized out. The return value is 0 for that case.
13116 FIXME drow/2003-11-16: No callers check for this case any more; soon all
13117 callers will only want a very basic result and this can become a
13120 Note that stack[0] is unused except as a default error return.
13121 Note that stack overflow is not yet handled. */
13124 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
13126 struct objfile *objfile = cu->objfile;
13128 int size = blk->size;
13129 gdb_byte *data = blk->data;
13130 CORE_ADDR stack[64];
13132 unsigned int bytes_read, unsnd;
13176 stack[++stacki] = op - DW_OP_lit0;
13211 stack[++stacki] = op - DW_OP_reg0;
13213 dwarf2_complex_location_expr_complaint ();
13217 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
13219 stack[++stacki] = unsnd;
13221 dwarf2_complex_location_expr_complaint ();
13225 stack[++stacki] = read_address (objfile->obfd, &data[i],
13230 case DW_OP_const1u:
13231 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
13235 case DW_OP_const1s:
13236 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
13240 case DW_OP_const2u:
13241 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
13245 case DW_OP_const2s:
13246 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
13250 case DW_OP_const4u:
13251 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
13255 case DW_OP_const4s:
13256 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
13261 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
13267 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
13272 stack[stacki + 1] = stack[stacki];
13277 stack[stacki - 1] += stack[stacki];
13281 case DW_OP_plus_uconst:
13282 stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
13287 stack[stacki - 1] -= stack[stacki];
13292 /* If we're not the last op, then we definitely can't encode
13293 this using GDB's address_class enum. This is valid for partial
13294 global symbols, although the variable's address will be bogus
13297 dwarf2_complex_location_expr_complaint ();
13300 case DW_OP_GNU_push_tls_address:
13301 /* The top of the stack has the offset from the beginning
13302 of the thread control block at which the variable is located. */
13303 /* Nothing should follow this operator, so the top of stack would
13305 /* This is valid for partial global symbols, but the variable's
13306 address will be bogus in the psymtab. */
13308 dwarf2_complex_location_expr_complaint ();
13311 case DW_OP_GNU_uninit:
13315 complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
13316 dwarf_stack_op_name (op, 1));
13317 return (stack[stacki]);
13320 return (stack[stacki]);
13323 /* memory allocation interface */
13325 static struct dwarf_block *
13326 dwarf_alloc_block (struct dwarf2_cu *cu)
13328 struct dwarf_block *blk;
13330 blk = (struct dwarf_block *)
13331 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
13335 static struct abbrev_info *
13336 dwarf_alloc_abbrev (struct dwarf2_cu *cu)
13338 struct abbrev_info *abbrev;
13340 abbrev = (struct abbrev_info *)
13341 obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info));
13342 memset (abbrev, 0, sizeof (struct abbrev_info));
13346 static struct die_info *
13347 dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs)
13349 struct die_info *die;
13350 size_t size = sizeof (struct die_info);
13353 size += (num_attrs - 1) * sizeof (struct attribute);
13355 die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size);
13356 memset (die, 0, sizeof (struct die_info));
13361 /* Macro support. */
13364 /* Return the full name of file number I in *LH's file name table.
13365 Use COMP_DIR as the name of the current directory of the
13366 compilation. The result is allocated using xmalloc; the caller is
13367 responsible for freeing it. */
13369 file_full_name (int file, struct line_header *lh, const char *comp_dir)
13371 /* Is the file number a valid index into the line header's file name
13372 table? Remember that file numbers start with one, not zero. */
13373 if (1 <= file && file <= lh->num_file_names)
13375 struct file_entry *fe = &lh->file_names[file - 1];
13377 if (IS_ABSOLUTE_PATH (fe->name))
13378 return xstrdup (fe->name);
13386 dir = lh->include_dirs[fe->dir_index - 1];
13392 dir_len = strlen (dir);
13393 full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
13394 strcpy (full_name, dir);
13395 full_name[dir_len] = '/';
13396 strcpy (full_name + dir_len + 1, fe->name);
13400 return xstrdup (fe->name);
13405 /* The compiler produced a bogus file number. We can at least
13406 record the macro definitions made in the file, even if we
13407 won't be able to find the file by name. */
13408 char fake_name[80];
13410 sprintf (fake_name, "<bad macro file number %d>", file);
13412 complaint (&symfile_complaints,
13413 _("bad file number in macro information (%d)"),
13416 return xstrdup (fake_name);
13421 static struct macro_source_file *
13422 macro_start_file (int file, int line,
13423 struct macro_source_file *current_file,
13424 const char *comp_dir,
13425 struct line_header *lh, struct objfile *objfile)
13427 /* The full name of this source file. */
13428 char *full_name = file_full_name (file, lh, comp_dir);
13430 /* We don't create a macro table for this compilation unit
13431 at all until we actually get a filename. */
13432 if (! pending_macros)
13433 pending_macros = new_macro_table (&objfile->objfile_obstack,
13434 objfile->macro_cache);
13436 if (! current_file)
13437 /* If we have no current file, then this must be the start_file
13438 directive for the compilation unit's main source file. */
13439 current_file = macro_set_main (pending_macros, full_name);
13441 current_file = macro_include (current_file, line, full_name);
13445 return current_file;
13449 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
13450 followed by a null byte. */
13452 copy_string (const char *buf, int len)
13454 char *s = xmalloc (len + 1);
13456 memcpy (s, buf, len);
13462 static const char *
13463 consume_improper_spaces (const char *p, const char *body)
13467 complaint (&symfile_complaints,
13468 _("macro definition contains spaces in formal argument list:\n`%s'"),
13480 parse_macro_definition (struct macro_source_file *file, int line,
13485 /* The body string takes one of two forms. For object-like macro
13486 definitions, it should be:
13488 <macro name> " " <definition>
13490 For function-like macro definitions, it should be:
13492 <macro name> "() " <definition>
13494 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
13496 Spaces may appear only where explicitly indicated, and in the
13499 The Dwarf 2 spec says that an object-like macro's name is always
13500 followed by a space, but versions of GCC around March 2002 omit
13501 the space when the macro's definition is the empty string.
13503 The Dwarf 2 spec says that there should be no spaces between the
13504 formal arguments in a function-like macro's formal argument list,
13505 but versions of GCC around March 2002 include spaces after the
13509 /* Find the extent of the macro name. The macro name is terminated
13510 by either a space or null character (for an object-like macro) or
13511 an opening paren (for a function-like macro). */
13512 for (p = body; *p; p++)
13513 if (*p == ' ' || *p == '(')
13516 if (*p == ' ' || *p == '\0')
13518 /* It's an object-like macro. */
13519 int name_len = p - body;
13520 char *name = copy_string (body, name_len);
13521 const char *replacement;
13524 replacement = body + name_len + 1;
13527 dwarf2_macro_malformed_definition_complaint (body);
13528 replacement = body + name_len;
13531 macro_define_object (file, line, name, replacement);
13535 else if (*p == '(')
13537 /* It's a function-like macro. */
13538 char *name = copy_string (body, p - body);
13541 char **argv = xmalloc (argv_size * sizeof (*argv));
13545 p = consume_improper_spaces (p, body);
13547 /* Parse the formal argument list. */
13548 while (*p && *p != ')')
13550 /* Find the extent of the current argument name. */
13551 const char *arg_start = p;
13553 while (*p && *p != ',' && *p != ')' && *p != ' ')
13556 if (! *p || p == arg_start)
13557 dwarf2_macro_malformed_definition_complaint (body);
13560 /* Make sure argv has room for the new argument. */
13561 if (argc >= argv_size)
13564 argv = xrealloc (argv, argv_size * sizeof (*argv));
13567 argv[argc++] = copy_string (arg_start, p - arg_start);
13570 p = consume_improper_spaces (p, body);
13572 /* Consume the comma, if present. */
13577 p = consume_improper_spaces (p, body);
13586 /* Perfectly formed definition, no complaints. */
13587 macro_define_function (file, line, name,
13588 argc, (const char **) argv,
13590 else if (*p == '\0')
13592 /* Complain, but do define it. */
13593 dwarf2_macro_malformed_definition_complaint (body);
13594 macro_define_function (file, line, name,
13595 argc, (const char **) argv,
13599 /* Just complain. */
13600 dwarf2_macro_malformed_definition_complaint (body);
13603 /* Just complain. */
13604 dwarf2_macro_malformed_definition_complaint (body);
13610 for (i = 0; i < argc; i++)
13616 dwarf2_macro_malformed_definition_complaint (body);
13621 dwarf_decode_macros (struct line_header *lh, unsigned int offset,
13622 char *comp_dir, bfd *abfd,
13623 struct dwarf2_cu *cu)
13625 gdb_byte *mac_ptr, *mac_end;
13626 struct macro_source_file *current_file = 0;
13627 enum dwarf_macinfo_record_type macinfo_type;
13628 int at_commandline;
13630 dwarf2_read_section (dwarf2_per_objfile->objfile,
13631 &dwarf2_per_objfile->macinfo);
13632 if (dwarf2_per_objfile->macinfo.buffer == NULL)
13634 complaint (&symfile_complaints, _("missing .debug_macinfo section"));
13638 /* First pass: Find the name of the base filename.
13639 This filename is needed in order to process all macros whose definition
13640 (or undefinition) comes from the command line. These macros are defined
13641 before the first DW_MACINFO_start_file entry, and yet still need to be
13642 associated to the base file.
13644 To determine the base file name, we scan the macro definitions until we
13645 reach the first DW_MACINFO_start_file entry. We then initialize
13646 CURRENT_FILE accordingly so that any macro definition found before the
13647 first DW_MACINFO_start_file can still be associated to the base file. */
13649 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
13650 mac_end = dwarf2_per_objfile->macinfo.buffer
13651 + dwarf2_per_objfile->macinfo.size;
13655 /* Do we at least have room for a macinfo type byte? */
13656 if (mac_ptr >= mac_end)
13658 /* Complaint is printed during the second pass as GDB will probably
13659 stop the first pass earlier upon finding DW_MACINFO_start_file. */
13663 macinfo_type = read_1_byte (abfd, mac_ptr);
13666 switch (macinfo_type)
13668 /* A zero macinfo type indicates the end of the macro
13673 case DW_MACINFO_define:
13674 case DW_MACINFO_undef:
13675 /* Only skip the data by MAC_PTR. */
13677 unsigned int bytes_read;
13679 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13680 mac_ptr += bytes_read;
13681 read_direct_string (abfd, mac_ptr, &bytes_read);
13682 mac_ptr += bytes_read;
13686 case DW_MACINFO_start_file:
13688 unsigned int bytes_read;
13691 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13692 mac_ptr += bytes_read;
13693 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13694 mac_ptr += bytes_read;
13696 current_file = macro_start_file (file, line, current_file, comp_dir,
13701 case DW_MACINFO_end_file:
13702 /* No data to skip by MAC_PTR. */
13705 case DW_MACINFO_vendor_ext:
13706 /* Only skip the data by MAC_PTR. */
13708 unsigned int bytes_read;
13710 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13711 mac_ptr += bytes_read;
13712 read_direct_string (abfd, mac_ptr, &bytes_read);
13713 mac_ptr += bytes_read;
13720 } while (macinfo_type != 0 && current_file == NULL);
13722 /* Second pass: Process all entries.
13724 Use the AT_COMMAND_LINE flag to determine whether we are still processing
13725 command-line macro definitions/undefinitions. This flag is unset when we
13726 reach the first DW_MACINFO_start_file entry. */
13728 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
13730 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
13731 GDB is still reading the definitions from command line. First
13732 DW_MACINFO_start_file will need to be ignored as it was already executed
13733 to create CURRENT_FILE for the main source holding also the command line
13734 definitions. On first met DW_MACINFO_start_file this flag is reset to
13735 normally execute all the remaining DW_MACINFO_start_file macinfos. */
13737 at_commandline = 1;
13741 /* Do we at least have room for a macinfo type byte? */
13742 if (mac_ptr >= mac_end)
13744 dwarf2_macros_too_long_complaint ();
13748 macinfo_type = read_1_byte (abfd, mac_ptr);
13751 switch (macinfo_type)
13753 /* A zero macinfo type indicates the end of the macro
13758 case DW_MACINFO_define:
13759 case DW_MACINFO_undef:
13761 unsigned int bytes_read;
13765 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13766 mac_ptr += bytes_read;
13767 body = read_direct_string (abfd, mac_ptr, &bytes_read);
13768 mac_ptr += bytes_read;
13770 if (! current_file)
13772 /* DWARF violation as no main source is present. */
13773 complaint (&symfile_complaints,
13774 _("debug info with no main source gives macro %s "
13776 macinfo_type == DW_MACINFO_define ?
13778 macinfo_type == DW_MACINFO_undef ?
13779 _("undefinition") :
13780 _("something-or-other"), line, body);
13783 if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
13784 complaint (&symfile_complaints,
13785 _("debug info gives %s macro %s with %s line %d: %s"),
13786 at_commandline ? _("command-line") : _("in-file"),
13787 macinfo_type == DW_MACINFO_define ?
13789 macinfo_type == DW_MACINFO_undef ?
13790 _("undefinition") :
13791 _("something-or-other"),
13792 line == 0 ? _("zero") : _("non-zero"), line, body);
13794 if (macinfo_type == DW_MACINFO_define)
13795 parse_macro_definition (current_file, line, body);
13796 else if (macinfo_type == DW_MACINFO_undef)
13797 macro_undef (current_file, line, body);
13801 case DW_MACINFO_start_file:
13803 unsigned int bytes_read;
13806 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13807 mac_ptr += bytes_read;
13808 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13809 mac_ptr += bytes_read;
13811 if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
13812 complaint (&symfile_complaints,
13813 _("debug info gives source %d included "
13814 "from %s at %s line %d"),
13815 file, at_commandline ? _("command-line") : _("file"),
13816 line == 0 ? _("zero") : _("non-zero"), line);
13818 if (at_commandline)
13820 /* This DW_MACINFO_start_file was executed in the pass one. */
13821 at_commandline = 0;
13824 current_file = macro_start_file (file, line,
13825 current_file, comp_dir,
13830 case DW_MACINFO_end_file:
13831 if (! current_file)
13832 complaint (&symfile_complaints,
13833 _("macro debug info has an unmatched `close_file' directive"));
13836 current_file = current_file->included_by;
13837 if (! current_file)
13839 enum dwarf_macinfo_record_type next_type;
13841 /* GCC circa March 2002 doesn't produce the zero
13842 type byte marking the end of the compilation
13843 unit. Complain if it's not there, but exit no
13846 /* Do we at least have room for a macinfo type byte? */
13847 if (mac_ptr >= mac_end)
13849 dwarf2_macros_too_long_complaint ();
13853 /* We don't increment mac_ptr here, so this is just
13855 next_type = read_1_byte (abfd, mac_ptr);
13856 if (next_type != 0)
13857 complaint (&symfile_complaints,
13858 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
13865 case DW_MACINFO_vendor_ext:
13867 unsigned int bytes_read;
13871 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13872 mac_ptr += bytes_read;
13873 string = read_direct_string (abfd, mac_ptr, &bytes_read);
13874 mac_ptr += bytes_read;
13876 /* We don't recognize any vendor extensions. */
13880 } while (macinfo_type != 0);
13883 /* Check if the attribute's form is a DW_FORM_block*
13884 if so return true else false. */
13886 attr_form_is_block (struct attribute *attr)
13888 return (attr == NULL ? 0 :
13889 attr->form == DW_FORM_block1
13890 || attr->form == DW_FORM_block2
13891 || attr->form == DW_FORM_block4
13892 || attr->form == DW_FORM_block
13893 || attr->form == DW_FORM_exprloc);
13896 /* Return non-zero if ATTR's value is a section offset --- classes
13897 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
13898 You may use DW_UNSND (attr) to retrieve such offsets.
13900 Section 7.5.4, "Attribute Encodings", explains that no attribute
13901 may have a value that belongs to more than one of these classes; it
13902 would be ambiguous if we did, because we use the same forms for all
13905 attr_form_is_section_offset (struct attribute *attr)
13907 return (attr->form == DW_FORM_data4
13908 || attr->form == DW_FORM_data8
13909 || attr->form == DW_FORM_sec_offset);
13913 /* Return non-zero if ATTR's value falls in the 'constant' class, or
13914 zero otherwise. When this function returns true, you can apply
13915 dwarf2_get_attr_constant_value to it.
13917 However, note that for some attributes you must check
13918 attr_form_is_section_offset before using this test. DW_FORM_data4
13919 and DW_FORM_data8 are members of both the constant class, and of
13920 the classes that contain offsets into other debug sections
13921 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
13922 that, if an attribute's can be either a constant or one of the
13923 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
13924 taken as section offsets, not constants. */
13926 attr_form_is_constant (struct attribute *attr)
13928 switch (attr->form)
13930 case DW_FORM_sdata:
13931 case DW_FORM_udata:
13932 case DW_FORM_data1:
13933 case DW_FORM_data2:
13934 case DW_FORM_data4:
13935 case DW_FORM_data8:
13943 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
13944 struct dwarf2_cu *cu)
13946 if (attr_form_is_section_offset (attr)
13947 /* ".debug_loc" may not exist at all, or the offset may be outside
13948 the section. If so, fall through to the complaint in the
13950 && DW_UNSND (attr) < dwarf2_per_objfile->loc.size)
13952 struct dwarf2_loclist_baton *baton;
13954 baton = obstack_alloc (&cu->objfile->objfile_obstack,
13955 sizeof (struct dwarf2_loclist_baton));
13956 baton->per_cu = cu->per_cu;
13957 gdb_assert (baton->per_cu);
13959 dwarf2_read_section (dwarf2_per_objfile->objfile,
13960 &dwarf2_per_objfile->loc);
13962 /* We don't know how long the location list is, but make sure we
13963 don't run off the edge of the section. */
13964 baton->size = dwarf2_per_objfile->loc.size - DW_UNSND (attr);
13965 baton->data = dwarf2_per_objfile->loc.buffer + DW_UNSND (attr);
13966 baton->base_address = cu->base_address;
13967 if (cu->base_known == 0)
13968 complaint (&symfile_complaints,
13969 _("Location list used without specifying the CU base address."));
13971 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_loclist_funcs;
13972 SYMBOL_LOCATION_BATON (sym) = baton;
13976 struct dwarf2_locexpr_baton *baton;
13978 baton = obstack_alloc (&cu->objfile->objfile_obstack,
13979 sizeof (struct dwarf2_locexpr_baton));
13980 baton->per_cu = cu->per_cu;
13981 gdb_assert (baton->per_cu);
13983 if (attr_form_is_block (attr))
13985 /* Note that we're just copying the block's data pointer
13986 here, not the actual data. We're still pointing into the
13987 info_buffer for SYM's objfile; right now we never release
13988 that buffer, but when we do clean up properly this may
13990 baton->size = DW_BLOCK (attr)->size;
13991 baton->data = DW_BLOCK (attr)->data;
13995 dwarf2_invalid_attrib_class_complaint ("location description",
13996 SYMBOL_NATURAL_NAME (sym));
13998 baton->data = NULL;
14001 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
14002 SYMBOL_LOCATION_BATON (sym) = baton;
14006 /* Return the OBJFILE associated with the compilation unit CU. If CU
14007 came from a separate debuginfo file, then the master objfile is
14011 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu)
14013 struct objfile *objfile = per_cu->objfile;
14015 /* Return the master objfile, so that we can report and look up the
14016 correct file containing this variable. */
14017 if (objfile->separate_debug_objfile_backlink)
14018 objfile = objfile->separate_debug_objfile_backlink;
14023 /* Return the address size given in the compilation unit header for CU. */
14026 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu)
14029 return per_cu->cu->header.addr_size;
14032 /* If the CU is not currently read in, we re-read its header. */
14033 struct objfile *objfile = per_cu->objfile;
14034 struct dwarf2_per_objfile *per_objfile
14035 = objfile_data (objfile, dwarf2_objfile_data_key);
14036 gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
14037 struct comp_unit_head cu_header;
14039 memset (&cu_header, 0, sizeof cu_header);
14040 read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
14041 return cu_header.addr_size;
14045 /* Return the offset size given in the compilation unit header for CU. */
14048 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu)
14051 return per_cu->cu->header.offset_size;
14054 /* If the CU is not currently read in, we re-read its header. */
14055 struct objfile *objfile = per_cu->objfile;
14056 struct dwarf2_per_objfile *per_objfile
14057 = objfile_data (objfile, dwarf2_objfile_data_key);
14058 gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
14059 struct comp_unit_head cu_header;
14061 memset (&cu_header, 0, sizeof cu_header);
14062 read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
14063 return cu_header.offset_size;
14067 /* Return the text offset of the CU. The returned offset comes from
14068 this CU's objfile. If this objfile came from a separate debuginfo
14069 file, then the offset may be different from the corresponding
14070 offset in the parent objfile. */
14073 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu)
14075 struct objfile *objfile = per_cu->objfile;
14077 return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
14080 /* Locate the .debug_info compilation unit from CU's objfile which contains
14081 the DIE at OFFSET. Raises an error on failure. */
14083 static struct dwarf2_per_cu_data *
14084 dwarf2_find_containing_comp_unit (unsigned int offset,
14085 struct objfile *objfile)
14087 struct dwarf2_per_cu_data *this_cu;
14091 high = dwarf2_per_objfile->n_comp_units - 1;
14094 int mid = low + (high - low) / 2;
14096 if (dwarf2_per_objfile->all_comp_units[mid]->offset >= offset)
14101 gdb_assert (low == high);
14102 if (dwarf2_per_objfile->all_comp_units[low]->offset > offset)
14105 error (_("Dwarf Error: could not find partial DIE containing "
14106 "offset 0x%lx [in module %s]"),
14107 (long) offset, bfd_get_filename (objfile->obfd));
14109 gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset <= offset);
14110 return dwarf2_per_objfile->all_comp_units[low-1];
14114 this_cu = dwarf2_per_objfile->all_comp_units[low];
14115 if (low == dwarf2_per_objfile->n_comp_units - 1
14116 && offset >= this_cu->offset + this_cu->length)
14117 error (_("invalid dwarf2 offset %u"), offset);
14118 gdb_assert (offset < this_cu->offset + this_cu->length);
14123 /* Locate the compilation unit from OBJFILE which is located at exactly
14124 OFFSET. Raises an error on failure. */
14126 static struct dwarf2_per_cu_data *
14127 dwarf2_find_comp_unit (unsigned int offset, struct objfile *objfile)
14129 struct dwarf2_per_cu_data *this_cu;
14131 this_cu = dwarf2_find_containing_comp_unit (offset, objfile);
14132 if (this_cu->offset != offset)
14133 error (_("no compilation unit with offset %u."), offset);
14137 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
14139 static struct dwarf2_cu *
14140 alloc_one_comp_unit (struct objfile *objfile)
14142 struct dwarf2_cu *cu = xcalloc (1, sizeof (struct dwarf2_cu));
14143 cu->objfile = objfile;
14144 obstack_init (&cu->comp_unit_obstack);
14148 /* Release one cached compilation unit, CU. We unlink it from the tree
14149 of compilation units, but we don't remove it from the read_in_chain;
14150 the caller is responsible for that.
14151 NOTE: DATA is a void * because this function is also used as a
14152 cleanup routine. */
14155 free_one_comp_unit (void *data)
14157 struct dwarf2_cu *cu = data;
14159 if (cu->per_cu != NULL)
14160 cu->per_cu->cu = NULL;
14163 obstack_free (&cu->comp_unit_obstack, NULL);
14168 /* This cleanup function is passed the address of a dwarf2_cu on the stack
14169 when we're finished with it. We can't free the pointer itself, but be
14170 sure to unlink it from the cache. Also release any associated storage
14171 and perform cache maintenance.
14173 Only used during partial symbol parsing. */
14176 free_stack_comp_unit (void *data)
14178 struct dwarf2_cu *cu = data;
14180 obstack_free (&cu->comp_unit_obstack, NULL);
14181 cu->partial_dies = NULL;
14183 if (cu->per_cu != NULL)
14185 /* This compilation unit is on the stack in our caller, so we
14186 should not xfree it. Just unlink it. */
14187 cu->per_cu->cu = NULL;
14190 /* If we had a per-cu pointer, then we may have other compilation
14191 units loaded, so age them now. */
14192 age_cached_comp_units ();
14196 /* Free all cached compilation units. */
14199 free_cached_comp_units (void *data)
14201 struct dwarf2_per_cu_data *per_cu, **last_chain;
14203 per_cu = dwarf2_per_objfile->read_in_chain;
14204 last_chain = &dwarf2_per_objfile->read_in_chain;
14205 while (per_cu != NULL)
14207 struct dwarf2_per_cu_data *next_cu;
14209 next_cu = per_cu->cu->read_in_chain;
14211 free_one_comp_unit (per_cu->cu);
14212 *last_chain = next_cu;
14218 /* Increase the age counter on each cached compilation unit, and free
14219 any that are too old. */
14222 age_cached_comp_units (void)
14224 struct dwarf2_per_cu_data *per_cu, **last_chain;
14226 dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
14227 per_cu = dwarf2_per_objfile->read_in_chain;
14228 while (per_cu != NULL)
14230 per_cu->cu->last_used ++;
14231 if (per_cu->cu->last_used <= dwarf2_max_cache_age)
14232 dwarf2_mark (per_cu->cu);
14233 per_cu = per_cu->cu->read_in_chain;
14236 per_cu = dwarf2_per_objfile->read_in_chain;
14237 last_chain = &dwarf2_per_objfile->read_in_chain;
14238 while (per_cu != NULL)
14240 struct dwarf2_per_cu_data *next_cu;
14242 next_cu = per_cu->cu->read_in_chain;
14244 if (!per_cu->cu->mark)
14246 free_one_comp_unit (per_cu->cu);
14247 *last_chain = next_cu;
14250 last_chain = &per_cu->cu->read_in_chain;
14256 /* Remove a single compilation unit from the cache. */
14259 free_one_cached_comp_unit (void *target_cu)
14261 struct dwarf2_per_cu_data *per_cu, **last_chain;
14263 per_cu = dwarf2_per_objfile->read_in_chain;
14264 last_chain = &dwarf2_per_objfile->read_in_chain;
14265 while (per_cu != NULL)
14267 struct dwarf2_per_cu_data *next_cu;
14269 next_cu = per_cu->cu->read_in_chain;
14271 if (per_cu->cu == target_cu)
14273 free_one_comp_unit (per_cu->cu);
14274 *last_chain = next_cu;
14278 last_chain = &per_cu->cu->read_in_chain;
14284 /* Release all extra memory associated with OBJFILE. */
14287 dwarf2_free_objfile (struct objfile *objfile)
14289 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
14291 if (dwarf2_per_objfile == NULL)
14294 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
14295 free_cached_comp_units (NULL);
14297 if (dwarf2_per_objfile->using_index)
14301 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
14304 struct dwarf2_per_cu_data *per_cu =
14305 dwarf2_per_objfile->all_comp_units[i];
14307 if (!per_cu->v.quick->lines)
14310 for (j = 0; j < per_cu->v.quick->lines->num_file_names; ++j)
14312 if (per_cu->v.quick->file_names)
14313 xfree ((void *) per_cu->v.quick->file_names[j]);
14314 if (per_cu->v.quick->full_names)
14315 xfree ((void *) per_cu->v.quick->full_names[j]);
14318 free_line_header (per_cu->v.quick->lines);
14322 /* Everything else should be on the objfile obstack. */
14325 /* A pair of DIE offset and GDB type pointer. We store these
14326 in a hash table separate from the DIEs, and preserve them
14327 when the DIEs are flushed out of cache. */
14329 struct dwarf2_offset_and_type
14331 unsigned int offset;
14335 /* Hash function for a dwarf2_offset_and_type. */
14338 offset_and_type_hash (const void *item)
14340 const struct dwarf2_offset_and_type *ofs = item;
14342 return ofs->offset;
14345 /* Equality function for a dwarf2_offset_and_type. */
14348 offset_and_type_eq (const void *item_lhs, const void *item_rhs)
14350 const struct dwarf2_offset_and_type *ofs_lhs = item_lhs;
14351 const struct dwarf2_offset_and_type *ofs_rhs = item_rhs;
14353 return ofs_lhs->offset == ofs_rhs->offset;
14356 /* Set the type associated with DIE to TYPE. Save it in CU's hash
14357 table if necessary. For convenience, return TYPE.
14359 The DIEs reading must have careful ordering to:
14360 * Not cause infite loops trying to read in DIEs as a prerequisite for
14361 reading current DIE.
14362 * Not trying to dereference contents of still incompletely read in types
14363 while reading in other DIEs.
14364 * Enable referencing still incompletely read in types just by a pointer to
14365 the type without accessing its fields.
14367 Therefore caller should follow these rules:
14368 * Try to fetch any prerequisite types we may need to build this DIE type
14369 before building the type and calling set_die_type.
14370 * After building type call set_die_type for current DIE as soon as
14371 possible before fetching more types to complete the current type.
14372 * Make the type as complete as possible before fetching more types. */
14374 static struct type *
14375 set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
14377 struct dwarf2_offset_and_type **slot, ofs;
14378 struct objfile *objfile = cu->objfile;
14379 htab_t *type_hash_ptr;
14381 /* For Ada types, make sure that the gnat-specific data is always
14382 initialized (if not already set). There are a few types where
14383 we should not be doing so, because the type-specific area is
14384 already used to hold some other piece of info (eg: TYPE_CODE_FLT
14385 where the type-specific area is used to store the floatformat).
14386 But this is not a problem, because the gnat-specific information
14387 is actually not needed for these types. */
14388 if (need_gnat_info (cu)
14389 && TYPE_CODE (type) != TYPE_CODE_FUNC
14390 && TYPE_CODE (type) != TYPE_CODE_FLT
14391 && !HAVE_GNAT_AUX_INFO (type))
14392 INIT_GNAT_SPECIFIC (type);
14394 if (cu->per_cu->from_debug_types)
14395 type_hash_ptr = &dwarf2_per_objfile->debug_types_type_hash;
14397 type_hash_ptr = &dwarf2_per_objfile->debug_info_type_hash;
14399 if (*type_hash_ptr == NULL)
14402 = htab_create_alloc_ex (127,
14403 offset_and_type_hash,
14404 offset_and_type_eq,
14406 &objfile->objfile_obstack,
14407 hashtab_obstack_allocate,
14408 dummy_obstack_deallocate);
14411 ofs.offset = die->offset;
14413 slot = (struct dwarf2_offset_and_type **)
14414 htab_find_slot_with_hash (*type_hash_ptr, &ofs, ofs.offset, INSERT);
14416 complaint (&symfile_complaints,
14417 _("A problem internal to GDB: DIE 0x%x has type already set"),
14419 *slot = obstack_alloc (&objfile->objfile_obstack, sizeof (**slot));
14424 /* Look up the type for the die at DIE_OFFSET in the appropriate type_hash
14425 table, or return NULL if the die does not have a saved type. */
14427 static struct type *
14428 get_die_type_at_offset (unsigned int offset,
14429 struct dwarf2_per_cu_data *per_cu)
14431 struct dwarf2_offset_and_type *slot, ofs;
14434 if (per_cu->from_debug_types)
14435 type_hash = dwarf2_per_objfile->debug_types_type_hash;
14437 type_hash = dwarf2_per_objfile->debug_info_type_hash;
14438 if (type_hash == NULL)
14441 ofs.offset = offset;
14442 slot = htab_find_with_hash (type_hash, &ofs, ofs.offset);
14449 /* Look up the type for DIE in the appropriate type_hash table,
14450 or return NULL if DIE does not have a saved type. */
14452 static struct type *
14453 get_die_type (struct die_info *die, struct dwarf2_cu *cu)
14455 return get_die_type_at_offset (die->offset, cu->per_cu);
14458 /* Add a dependence relationship from CU to REF_PER_CU. */
14461 dwarf2_add_dependence (struct dwarf2_cu *cu,
14462 struct dwarf2_per_cu_data *ref_per_cu)
14466 if (cu->dependencies == NULL)
14468 = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
14469 NULL, &cu->comp_unit_obstack,
14470 hashtab_obstack_allocate,
14471 dummy_obstack_deallocate);
14473 slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
14475 *slot = ref_per_cu;
14478 /* Subroutine of dwarf2_mark to pass to htab_traverse.
14479 Set the mark field in every compilation unit in the
14480 cache that we must keep because we are keeping CU. */
14483 dwarf2_mark_helper (void **slot, void *data)
14485 struct dwarf2_per_cu_data *per_cu;
14487 per_cu = (struct dwarf2_per_cu_data *) *slot;
14488 if (per_cu->cu->mark)
14490 per_cu->cu->mark = 1;
14492 if (per_cu->cu->dependencies != NULL)
14493 htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
14498 /* Set the mark field in CU and in every other compilation unit in the
14499 cache that we must keep because we are keeping CU. */
14502 dwarf2_mark (struct dwarf2_cu *cu)
14507 if (cu->dependencies != NULL)
14508 htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
14512 dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
14516 per_cu->cu->mark = 0;
14517 per_cu = per_cu->cu->read_in_chain;
14521 /* Trivial hash function for partial_die_info: the hash value of a DIE
14522 is its offset in .debug_info for this objfile. */
14525 partial_die_hash (const void *item)
14527 const struct partial_die_info *part_die = item;
14529 return part_die->offset;
14532 /* Trivial comparison function for partial_die_info structures: two DIEs
14533 are equal if they have the same offset. */
14536 partial_die_eq (const void *item_lhs, const void *item_rhs)
14538 const struct partial_die_info *part_die_lhs = item_lhs;
14539 const struct partial_die_info *part_die_rhs = item_rhs;
14541 return part_die_lhs->offset == part_die_rhs->offset;
14544 static struct cmd_list_element *set_dwarf2_cmdlist;
14545 static struct cmd_list_element *show_dwarf2_cmdlist;
14548 set_dwarf2_cmd (char *args, int from_tty)
14550 help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
14554 show_dwarf2_cmd (char *args, int from_tty)
14556 cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
14559 /* If section described by INFO was mmapped, munmap it now. */
14562 munmap_section_buffer (struct dwarf2_section_info *info)
14564 if (info->was_mmapped)
14567 intptr_t begin = (intptr_t) info->buffer;
14568 intptr_t map_begin = begin & ~(pagesize - 1);
14569 size_t map_length = info->size + begin - map_begin;
14571 gdb_assert (munmap ((void *) map_begin, map_length) == 0);
14573 /* Without HAVE_MMAP, we should never be here to begin with. */
14574 gdb_assert_not_reached ("no mmap support");
14579 /* munmap debug sections for OBJFILE, if necessary. */
14582 dwarf2_per_objfile_free (struct objfile *objfile, void *d)
14584 struct dwarf2_per_objfile *data = d;
14586 /* This is sorted according to the order they're defined in to make it easier
14587 to keep in sync. */
14588 munmap_section_buffer (&data->info);
14589 munmap_section_buffer (&data->abbrev);
14590 munmap_section_buffer (&data->line);
14591 munmap_section_buffer (&data->loc);
14592 munmap_section_buffer (&data->macinfo);
14593 munmap_section_buffer (&data->str);
14594 munmap_section_buffer (&data->ranges);
14595 munmap_section_buffer (&data->types);
14596 munmap_section_buffer (&data->frame);
14597 munmap_section_buffer (&data->eh_frame);
14598 munmap_section_buffer (&data->gdb_index);
14603 /* The contents of the hash table we create when building the string
14605 struct strtab_entry
14607 offset_type offset;
14611 /* Hash function for a strtab_entry. */
14613 hash_strtab_entry (const void *e)
14615 const struct strtab_entry *entry = e;
14616 return mapped_index_string_hash (entry->str);
14619 /* Equality function for a strtab_entry. */
14621 eq_strtab_entry (const void *a, const void *b)
14623 const struct strtab_entry *ea = a;
14624 const struct strtab_entry *eb = b;
14625 return !strcmp (ea->str, eb->str);
14628 /* Create a strtab_entry hash table. */
14630 create_strtab (void)
14632 return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry,
14633 xfree, xcalloc, xfree);
14636 /* Add a string to the constant pool. Return the string's offset in
14639 add_string (htab_t table, struct obstack *cpool, const char *str)
14642 struct strtab_entry entry;
14643 struct strtab_entry *result;
14646 slot = htab_find_slot (table, &entry, INSERT);
14651 result = XNEW (struct strtab_entry);
14652 result->offset = obstack_object_size (cpool);
14654 obstack_grow_str0 (cpool, str);
14657 return result->offset;
14660 /* An entry in the symbol table. */
14661 struct symtab_index_entry
14663 /* The name of the symbol. */
14665 /* The offset of the name in the constant pool. */
14666 offset_type index_offset;
14667 /* A sorted vector of the indices of all the CUs that hold an object
14669 VEC (offset_type) *cu_indices;
14672 /* The symbol table. This is a power-of-2-sized hash table. */
14673 struct mapped_symtab
14675 offset_type n_elements;
14677 struct symtab_index_entry **data;
14680 /* Hash function for a symtab_index_entry. */
14682 hash_symtab_entry (const void *e)
14684 const struct symtab_index_entry *entry = e;
14685 return iterative_hash (VEC_address (offset_type, entry->cu_indices),
14686 sizeof (offset_type) * VEC_length (offset_type,
14687 entry->cu_indices),
14691 /* Equality function for a symtab_index_entry. */
14693 eq_symtab_entry (const void *a, const void *b)
14695 const struct symtab_index_entry *ea = a;
14696 const struct symtab_index_entry *eb = b;
14697 int len = VEC_length (offset_type, ea->cu_indices);
14698 if (len != VEC_length (offset_type, eb->cu_indices))
14700 return !memcmp (VEC_address (offset_type, ea->cu_indices),
14701 VEC_address (offset_type, eb->cu_indices),
14702 sizeof (offset_type) * len);
14705 /* Destroy a symtab_index_entry. */
14707 delete_symtab_entry (void *p)
14709 struct symtab_index_entry *entry = p;
14710 VEC_free (offset_type, entry->cu_indices);
14714 /* Create a hash table holding symtab_index_entry objects. */
14716 create_index_table (void)
14718 return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry,
14719 delete_symtab_entry, xcalloc, xfree);
14722 /* Create a new mapped symtab object. */
14723 static struct mapped_symtab *
14724 create_mapped_symtab (void)
14726 struct mapped_symtab *symtab = XNEW (struct mapped_symtab);
14727 symtab->n_elements = 0;
14728 symtab->size = 1024;
14729 symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
14733 /* Destroy a mapped_symtab. */
14735 cleanup_mapped_symtab (void *p)
14737 struct mapped_symtab *symtab = p;
14738 /* The contents of the array are freed when the other hash table is
14740 xfree (symtab->data);
14744 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
14746 static struct symtab_index_entry **
14747 find_slot (struct mapped_symtab *symtab, const char *name)
14749 offset_type index, step, hash = mapped_index_string_hash (name);
14751 index = hash & (symtab->size - 1);
14752 step = ((hash * 17) & (symtab->size - 1)) | 1;
14756 if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name))
14757 return &symtab->data[index];
14758 index = (index + step) & (symtab->size - 1);
14762 /* Expand SYMTAB's hash table. */
14764 hash_expand (struct mapped_symtab *symtab)
14766 offset_type old_size = symtab->size;
14768 struct symtab_index_entry **old_entries = symtab->data;
14771 symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
14773 for (i = 0; i < old_size; ++i)
14775 if (old_entries[i])
14777 struct symtab_index_entry **slot = find_slot (symtab,
14778 old_entries[i]->name);
14779 *slot = old_entries[i];
14783 xfree (old_entries);
14786 /* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
14787 is the index of the CU in which the symbol appears. */
14789 add_index_entry (struct mapped_symtab *symtab, const char *name,
14790 offset_type cu_index)
14792 struct symtab_index_entry **slot;
14794 ++symtab->n_elements;
14795 if (4 * symtab->n_elements / 3 >= symtab->size)
14796 hash_expand (symtab);
14798 slot = find_slot (symtab, name);
14801 *slot = XNEW (struct symtab_index_entry);
14802 (*slot)->name = name;
14803 (*slot)->cu_indices = NULL;
14805 /* Don't push an index twice. Due to how we add entries we only
14806 have to check the last one. */
14807 if (VEC_empty (offset_type, (*slot)->cu_indices)
14808 || VEC_length (offset_type, (*slot)->cu_indices) != cu_index)
14809 VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index);
14812 /* Add a vector of indices to the constant pool. */
14814 add_indices_to_cpool (htab_t index_table, struct obstack *cpool,
14815 struct symtab_index_entry *entry)
14819 slot = htab_find_slot (index_table, entry, INSERT);
14822 offset_type len = VEC_length (offset_type, entry->cu_indices);
14823 offset_type val = MAYBE_SWAP (len);
14828 entry->index_offset = obstack_object_size (cpool);
14830 obstack_grow (cpool, &val, sizeof (val));
14832 VEC_iterate (offset_type, entry->cu_indices, i, iter);
14835 val = MAYBE_SWAP (iter);
14836 obstack_grow (cpool, &val, sizeof (val));
14841 struct symtab_index_entry *old_entry = *slot;
14842 entry->index_offset = old_entry->index_offset;
14845 return entry->index_offset;
14848 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
14849 constant pool entries going into the obstack CPOOL. */
14851 write_hash_table (struct mapped_symtab *symtab,
14852 struct obstack *output, struct obstack *cpool)
14855 htab_t index_table;
14858 index_table = create_index_table ();
14859 str_table = create_strtab ();
14860 /* We add all the index vectors to the constant pool first, to
14861 ensure alignment is ok. */
14862 for (i = 0; i < symtab->size; ++i)
14864 if (symtab->data[i])
14865 add_indices_to_cpool (index_table, cpool, symtab->data[i]);
14868 /* Now write out the hash table. */
14869 for (i = 0; i < symtab->size; ++i)
14871 offset_type str_off, vec_off;
14873 if (symtab->data[i])
14875 str_off = add_string (str_table, cpool, symtab->data[i]->name);
14876 vec_off = symtab->data[i]->index_offset;
14880 /* While 0 is a valid constant pool index, it is not valid
14881 to have 0 for both offsets. */
14886 str_off = MAYBE_SWAP (str_off);
14887 vec_off = MAYBE_SWAP (vec_off);
14889 obstack_grow (output, &str_off, sizeof (str_off));
14890 obstack_grow (output, &vec_off, sizeof (vec_off));
14893 htab_delete (str_table);
14894 htab_delete (index_table);
14897 /* Write an address entry to ADDR_OBSTACK. The addresses are taken
14898 from PST; CU_INDEX is the index of the CU in the vector of all
14901 add_address_entry (struct objfile *objfile,
14902 struct obstack *addr_obstack, struct partial_symtab *pst,
14903 unsigned int cu_index)
14905 offset_type offset;
14907 CORE_ADDR baseaddr;
14909 /* Don't bother recording empty ranges. */
14910 if (pst->textlow == pst->texthigh)
14913 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
14915 store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, pst->textlow - baseaddr);
14916 obstack_grow (addr_obstack, addr, 8);
14917 store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, pst->texthigh - baseaddr);
14918 obstack_grow (addr_obstack, addr, 8);
14919 offset = MAYBE_SWAP (cu_index);
14920 obstack_grow (addr_obstack, &offset, sizeof (offset_type));
14923 /* Add a list of partial symbols to SYMTAB. */
14925 write_psymbols (struct mapped_symtab *symtab,
14926 struct partial_symbol **psymp,
14928 offset_type cu_index)
14930 for (; count-- > 0; ++psymp)
14932 if (SYMBOL_LANGUAGE (*psymp) == language_ada)
14933 error (_("Ada is not currently supported by the index"));
14934 add_index_entry (symtab, SYMBOL_NATURAL_NAME (*psymp), cu_index);
14938 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
14939 exception if there is an error. */
14941 write_obstack (FILE *file, struct obstack *obstack)
14943 if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack),
14945 != obstack_object_size (obstack))
14946 error (_("couldn't data write to file"));
14949 /* Unlink a file if the argument is not NULL. */
14951 unlink_if_set (void *p)
14953 char **filename = p;
14955 unlink (*filename);
14958 /* A helper struct used when iterating over debug_types. */
14959 struct signatured_type_index_data
14961 struct objfile *objfile;
14962 struct mapped_symtab *symtab;
14963 struct obstack *types_list;
14967 /* A helper function that writes a single signatured_type to an
14970 write_one_signatured_type (void **slot, void *d)
14972 struct signatured_type_index_data *info = d;
14973 struct signatured_type *entry = (struct signatured_type *) *slot;
14974 struct dwarf2_per_cu_data *per_cu = &entry->per_cu;
14975 struct partial_symtab *psymtab = per_cu->v.psymtab;
14978 write_psymbols (info->symtab,
14979 info->objfile->global_psymbols.list + psymtab->globals_offset,
14980 psymtab->n_global_syms, info->cu_index);
14981 write_psymbols (info->symtab,
14982 info->objfile->static_psymbols.list + psymtab->statics_offset,
14983 psymtab->n_static_syms, info->cu_index);
14985 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->offset);
14986 obstack_grow (info->types_list, val, 8);
14987 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->type_offset);
14988 obstack_grow (info->types_list, val, 8);
14989 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature);
14990 obstack_grow (info->types_list, val, 8);
14997 /* Create an index file for OBJFILE in the directory DIR. */
14999 write_psymtabs_to_index (struct objfile *objfile, const char *dir)
15001 struct cleanup *cleanup;
15002 char *filename, *cleanup_filename;
15003 struct obstack contents, addr_obstack, constant_pool, symtab_obstack;
15004 struct obstack cu_list, types_cu_list;
15007 struct mapped_symtab *symtab;
15008 offset_type val, size_of_contents, total_len;
15012 if (!objfile->psymtabs)
15014 if (dwarf2_per_objfile->using_index)
15015 error (_("Cannot use an index to create the index"));
15017 if (stat (objfile->name, &st) < 0)
15018 perror_with_name (_("Could not stat"));
15020 filename = concat (dir, SLASH_STRING, lbasename (objfile->name),
15021 INDEX_SUFFIX, (char *) NULL);
15022 cleanup = make_cleanup (xfree, filename);
15024 out_file = fopen (filename, "wb");
15026 error (_("Can't open `%s' for writing"), filename);
15028 cleanup_filename = filename;
15029 make_cleanup (unlink_if_set, &cleanup_filename);
15031 symtab = create_mapped_symtab ();
15032 make_cleanup (cleanup_mapped_symtab, symtab);
15034 obstack_init (&addr_obstack);
15035 make_cleanup_obstack_free (&addr_obstack);
15037 obstack_init (&cu_list);
15038 make_cleanup_obstack_free (&cu_list);
15040 obstack_init (&types_cu_list);
15041 make_cleanup_obstack_free (&types_cu_list);
15043 /* The list is already sorted, so we don't need to do additional
15044 work here. Also, the debug_types entries do not appear in
15045 all_comp_units, but only in their own hash table. */
15046 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
15048 struct dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->all_comp_units[i];
15049 struct partial_symtab *psymtab = per_cu->v.psymtab;
15052 write_psymbols (symtab,
15053 objfile->global_psymbols.list + psymtab->globals_offset,
15054 psymtab->n_global_syms, i);
15055 write_psymbols (symtab,
15056 objfile->static_psymbols.list + psymtab->statics_offset,
15057 psymtab->n_static_syms, i);
15059 add_address_entry (objfile, &addr_obstack, psymtab, i);
15061 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->offset);
15062 obstack_grow (&cu_list, val, 8);
15063 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length);
15064 obstack_grow (&cu_list, val, 8);
15067 /* Write out the .debug_type entries, if any. */
15068 if (dwarf2_per_objfile->signatured_types)
15070 struct signatured_type_index_data sig_data;
15072 sig_data.objfile = objfile;
15073 sig_data.symtab = symtab;
15074 sig_data.types_list = &types_cu_list;
15075 sig_data.cu_index = dwarf2_per_objfile->n_comp_units;
15076 htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
15077 write_one_signatured_type, &sig_data);
15080 obstack_init (&constant_pool);
15081 make_cleanup_obstack_free (&constant_pool);
15082 obstack_init (&symtab_obstack);
15083 make_cleanup_obstack_free (&symtab_obstack);
15084 write_hash_table (symtab, &symtab_obstack, &constant_pool);
15086 obstack_init (&contents);
15087 make_cleanup_obstack_free (&contents);
15088 size_of_contents = 6 * sizeof (offset_type);
15089 total_len = size_of_contents;
15091 /* The version number. */
15092 val = MAYBE_SWAP (2);
15093 obstack_grow (&contents, &val, sizeof (val));
15095 /* The offset of the CU list from the start of the file. */
15096 val = MAYBE_SWAP (total_len);
15097 obstack_grow (&contents, &val, sizeof (val));
15098 total_len += obstack_object_size (&cu_list);
15100 /* The offset of the types CU list from the start of the file. */
15101 val = MAYBE_SWAP (total_len);
15102 obstack_grow (&contents, &val, sizeof (val));
15103 total_len += obstack_object_size (&types_cu_list);
15105 /* The offset of the address table from the start of the file. */
15106 val = MAYBE_SWAP (total_len);
15107 obstack_grow (&contents, &val, sizeof (val));
15108 total_len += obstack_object_size (&addr_obstack);
15110 /* The offset of the symbol table from the start of the file. */
15111 val = MAYBE_SWAP (total_len);
15112 obstack_grow (&contents, &val, sizeof (val));
15113 total_len += obstack_object_size (&symtab_obstack);
15115 /* The offset of the constant pool from the start of the file. */
15116 val = MAYBE_SWAP (total_len);
15117 obstack_grow (&contents, &val, sizeof (val));
15118 total_len += obstack_object_size (&constant_pool);
15120 gdb_assert (obstack_object_size (&contents) == size_of_contents);
15122 write_obstack (out_file, &contents);
15123 write_obstack (out_file, &cu_list);
15124 write_obstack (out_file, &types_cu_list);
15125 write_obstack (out_file, &addr_obstack);
15126 write_obstack (out_file, &symtab_obstack);
15127 write_obstack (out_file, &constant_pool);
15131 /* We want to keep the file, so we set cleanup_filename to NULL
15132 here. See unlink_if_set. */
15133 cleanup_filename = NULL;
15135 do_cleanups (cleanup);
15138 /* The mapped index file format is designed to be directly mmap()able
15139 on any architecture. In most cases, a datum is represented using a
15140 little-endian 32-bit integer value, called an offset_type. Big
15141 endian machines must byte-swap the values before using them.
15142 Exceptions to this rule are noted. The data is laid out such that
15143 alignment is always respected.
15145 A mapped index consists of several sections.
15147 1. The file header. This is a sequence of values, of offset_type
15148 unless otherwise noted:
15149 [0] The version number. Currently 1 or 2. The differences are
15150 noted below. Version 1 did not account for .debug_types sections;
15151 the presence of a .debug_types section invalidates any version 1
15152 index that may exist.
15153 [1] The offset, from the start of the file, of the CU list.
15154 [1.5] In version 2, the offset, from the start of the file, of the
15155 types CU list. This offset does not appear in version 1. Note
15156 that this can be empty, in which case this offset will be equal to
15158 [2] The offset, from the start of the file, of the address section.
15159 [3] The offset, from the start of the file, of the symbol table.
15160 [4] The offset, from the start of the file, of the constant pool.
15162 2. The CU list. This is a sequence of pairs of 64-bit
15163 little-endian values, sorted by the CU offset. The first element
15164 in each pair is the offset of a CU in the .debug_info section. The
15165 second element in each pair is the length of that CU. References
15166 to a CU elsewhere in the map are done using a CU index, which is
15167 just the 0-based index into this table. Note that if there are
15168 type CUs, then conceptually CUs and type CUs form a single list for
15169 the purposes of CU indices.
15171 2.5 The types CU list. This does not appear in a version 1 index.
15172 This is a sequence of triplets of 64-bit little-endian values. In
15173 a triplet, the first value is the CU offset, the second value is
15174 the type offset in the CU, and the third value is the type
15175 signature. The types CU list is not sorted.
15177 3. The address section. The address section consists of a sequence
15178 of address entries. Each address entry has three elements.
15179 [0] The low address. This is a 64-bit little-endian value.
15180 [1] The high address. This is a 64-bit little-endian value.
15181 [2] The CU index. This is an offset_type value.
15183 4. The symbol table. This is a hash table. The size of the hash
15184 table is always a power of 2. The initial hash and the step are
15185 currently defined by the `find_slot' function.
15187 Each slot in the hash table consists of a pair of offset_type
15188 values. The first value is the offset of the symbol's name in the
15189 constant pool. The second value is the offset of the CU vector in
15192 If both values are 0, then this slot in the hash table is empty.
15193 This is ok because while 0 is a valid constant pool index, it
15194 cannot be a valid index for both a string and a CU vector.
15196 A string in the constant pool is stored as a \0-terminated string,
15199 A CU vector in the constant pool is a sequence of offset_type
15200 values. The first value is the number of CU indices in the vector.
15201 Each subsequent value is the index of a CU in the CU list. This
15202 element in the hash table is used to indicate which CUs define the
15205 5. The constant pool. This is simply a bunch of bytes. It is
15206 organized so that alignment is correct: CU vectors are stored
15207 first, followed by strings. */
15209 save_gdb_index_command (char *arg, int from_tty)
15211 struct objfile *objfile;
15214 error (_("usage: save gdb-index DIRECTORY"));
15216 ALL_OBJFILES (objfile)
15220 /* If the objfile does not correspond to an actual file, skip it. */
15221 if (stat (objfile->name, &st) < 0)
15224 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
15225 if (dwarf2_per_objfile)
15227 volatile struct gdb_exception except;
15229 TRY_CATCH (except, RETURN_MASK_ERROR)
15231 write_psymtabs_to_index (objfile, arg);
15233 if (except.reason < 0)
15234 exception_fprintf (gdb_stderr, except,
15235 _("Error while writing index for `%s': "),
15243 int dwarf2_always_disassemble;
15246 show_dwarf2_always_disassemble (struct ui_file *file, int from_tty,
15247 struct cmd_list_element *c, const char *value)
15249 fprintf_filtered (file, _("\
15250 Whether to always disassemble DWARF expressions is %s.\n"),
15254 void _initialize_dwarf2_read (void);
15257 _initialize_dwarf2_read (void)
15259 struct cmd_list_element *c;
15261 dwarf2_objfile_data_key
15262 = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free);
15264 add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
15265 Set DWARF 2 specific variables.\n\
15266 Configure DWARF 2 variables such as the cache size"),
15267 &set_dwarf2_cmdlist, "maintenance set dwarf2 ",
15268 0/*allow-unknown*/, &maintenance_set_cmdlist);
15270 add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\
15271 Show DWARF 2 specific variables\n\
15272 Show DWARF 2 variables such as the cache size"),
15273 &show_dwarf2_cmdlist, "maintenance show dwarf2 ",
15274 0/*allow-unknown*/, &maintenance_show_cmdlist);
15276 add_setshow_zinteger_cmd ("max-cache-age", class_obscure,
15277 &dwarf2_max_cache_age, _("\
15278 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
15279 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
15280 A higher limit means that cached compilation units will be stored\n\
15281 in memory longer, and more total memory will be used. Zero disables\n\
15282 caching, which can slow down startup."),
15284 show_dwarf2_max_cache_age,
15285 &set_dwarf2_cmdlist,
15286 &show_dwarf2_cmdlist);
15288 add_setshow_boolean_cmd ("always-disassemble", class_obscure,
15289 &dwarf2_always_disassemble, _("\
15290 Set whether `info address' always disassembles DWARF expressions."), _("\
15291 Show whether `info address' always disassembles DWARF expressions."), _("\
15292 When enabled, DWARF expressions are always printed in an assembly-like\n\
15293 syntax. When disabled, expressions will be printed in a more\n\
15294 conversational style, when possible."),
15296 show_dwarf2_always_disassemble,
15297 &set_dwarf2_cmdlist,
15298 &show_dwarf2_cmdlist);
15300 add_setshow_zinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\
15301 Set debugging of the dwarf2 DIE reader."), _("\
15302 Show debugging of the dwarf2 DIE reader."), _("\
15303 When enabled (non-zero), DIEs are dumped after they are read in.\n\
15304 The value is the maximum depth to print."),
15307 &setdebuglist, &showdebuglist);
15309 c = add_cmd ("gdb-index", class_files, save_gdb_index_command,
15310 _("Save a .gdb-index file"),
15312 set_cmd_completer (c, filename_completer);