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, 2011
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 symbol table, implemented as a hash table. */
158 const offset_type *symbol_table;
159 /* Size in slots, each slot is 2 offset_types. */
160 offset_type symbol_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 or we are faking it for OBJF_READNOW's sake. */
209 unsigned char using_index;
211 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
212 struct mapped_index *index_table;
214 /* When using index_table, this keeps track of all quick_file_names entries.
215 TUs can share line table entries with CUs or other TUs, and there can be
216 a lot more TUs than unique line tables, so we maintain a separate table
217 of all line table entries to support the sharing. */
218 htab_t quick_file_names_table;
220 /* Set during partial symbol reading, to prevent queueing of full
222 int reading_partial_symbols;
224 /* Table mapping type .debug_info DIE offsets to types.
225 This is NULL if not allocated yet.
226 It (currently) makes sense to allocate debug_types_type_hash lazily.
227 To keep things simple we allocate both lazily. */
228 htab_t debug_info_type_hash;
230 /* Table mapping type .debug_types DIE offsets to types.
231 This is NULL if not allocated yet. */
232 htab_t debug_types_type_hash;
235 static struct dwarf2_per_objfile *dwarf2_per_objfile;
237 /* names of the debugging sections */
239 /* Note that if the debugging section has been compressed, it might
240 have a name like .zdebug_info. */
242 #define INFO_SECTION "debug_info"
243 #define ABBREV_SECTION "debug_abbrev"
244 #define LINE_SECTION "debug_line"
245 #define LOC_SECTION "debug_loc"
246 #define MACINFO_SECTION "debug_macinfo"
247 #define STR_SECTION "debug_str"
248 #define RANGES_SECTION "debug_ranges"
249 #define TYPES_SECTION "debug_types"
250 #define FRAME_SECTION "debug_frame"
251 #define EH_FRAME_SECTION "eh_frame"
252 #define GDB_INDEX_SECTION "gdb_index"
254 /* local data types */
256 /* We hold several abbreviation tables in memory at the same time. */
257 #ifndef ABBREV_HASH_SIZE
258 #define ABBREV_HASH_SIZE 121
261 /* The data in a compilation unit header, after target2host
262 translation, looks like this. */
263 struct comp_unit_head
267 unsigned char addr_size;
268 unsigned char signed_addr_p;
269 unsigned int abbrev_offset;
271 /* Size of file offsets; either 4 or 8. */
272 unsigned int offset_size;
274 /* Size of the length field; either 4 or 12. */
275 unsigned int initial_length_size;
277 /* Offset to the first byte of this compilation unit header in the
278 .debug_info section, for resolving relative reference dies. */
281 /* Offset to first die in this cu from the start of the cu.
282 This will be the first byte following the compilation unit header. */
283 unsigned int first_die_offset;
286 /* Type used for delaying computation of method physnames.
287 See comments for compute_delayed_physnames. */
288 struct delayed_method_info
290 /* The type to which the method is attached, i.e., its parent class. */
293 /* The index of the method in the type's function fieldlists. */
296 /* The index of the method in the fieldlist. */
299 /* The name of the DIE. */
302 /* The DIE associated with this method. */
303 struct die_info *die;
306 typedef struct delayed_method_info delayed_method_info;
307 DEF_VEC_O (delayed_method_info);
309 /* Internal state when decoding a particular compilation unit. */
312 /* The objfile containing this compilation unit. */
313 struct objfile *objfile;
315 /* The header of the compilation unit. */
316 struct comp_unit_head header;
318 /* Base address of this compilation unit. */
319 CORE_ADDR base_address;
321 /* Non-zero if base_address has been set. */
324 struct function_range *first_fn, *last_fn, *cached_fn;
326 /* The language we are debugging. */
327 enum language language;
328 const struct language_defn *language_defn;
330 const char *producer;
332 /* The generic symbol table building routines have separate lists for
333 file scope symbols and all all other scopes (local scopes). So
334 we need to select the right one to pass to add_symbol_to_list().
335 We do it by keeping a pointer to the correct list in list_in_scope.
337 FIXME: The original dwarf code just treated the file scope as the
338 first local scope, and all other local scopes as nested local
339 scopes, and worked fine. Check to see if we really need to
340 distinguish these in buildsym.c. */
341 struct pending **list_in_scope;
343 /* DWARF abbreviation table associated with this compilation unit. */
344 struct abbrev_info **dwarf2_abbrevs;
346 /* Storage for the abbrev table. */
347 struct obstack abbrev_obstack;
349 /* Hash table holding all the loaded partial DIEs. */
352 /* Storage for things with the same lifetime as this read-in compilation
353 unit, including partial DIEs. */
354 struct obstack comp_unit_obstack;
356 /* When multiple dwarf2_cu structures are living in memory, this field
357 chains them all together, so that they can be released efficiently.
358 We will probably also want a generation counter so that most-recently-used
359 compilation units are cached... */
360 struct dwarf2_per_cu_data *read_in_chain;
362 /* Backchain to our per_cu entry if the tree has been built. */
363 struct dwarf2_per_cu_data *per_cu;
365 /* How many compilation units ago was this CU last referenced? */
368 /* A hash table of die offsets for following references. */
371 /* Full DIEs if read in. */
372 struct die_info *dies;
374 /* A set of pointers to dwarf2_per_cu_data objects for compilation
375 units referenced by this one. Only set during full symbol processing;
376 partial symbol tables do not have dependencies. */
379 /* Header data from the line table, during full symbol processing. */
380 struct line_header *line_header;
382 /* A list of methods which need to have physnames computed
383 after all type information has been read. */
384 VEC (delayed_method_info) *method_list;
386 /* Mark used when releasing cached dies. */
387 unsigned int mark : 1;
389 /* This flag will be set if this compilation unit might include
390 inter-compilation-unit references. */
391 unsigned int has_form_ref_addr : 1;
393 /* This flag will be set if this compilation unit includes any
394 DW_TAG_namespace DIEs. If we know that there are explicit
395 DIEs for namespaces, we don't need to try to infer them
396 from mangled names. */
397 unsigned int has_namespace_info : 1;
400 /* Persistent data held for a compilation unit, even when not
401 processing it. We put a pointer to this structure in the
402 read_symtab_private field of the psymtab. If we encounter
403 inter-compilation-unit references, we also maintain a sorted
404 list of all compilation units. */
406 struct dwarf2_per_cu_data
408 /* The start offset and length of this compilation unit. 2**29-1
409 bytes should suffice to store the length of any compilation unit
410 - if it doesn't, GDB will fall over anyway.
411 NOTE: Unlike comp_unit_head.length, this length includes
412 initial_length_size. */
414 unsigned int length : 29;
416 /* Flag indicating this compilation unit will be read in before
417 any of the current compilation units are processed. */
418 unsigned int queued : 1;
420 /* This flag will be set if we need to load absolutely all DIEs
421 for this compilation unit, instead of just the ones we think
422 are interesting. It gets set if we look for a DIE in the
423 hash table and don't find it. */
424 unsigned int load_all_dies : 1;
426 /* Non-zero if this CU is from .debug_types.
427 Otherwise it's from .debug_info. */
428 unsigned int from_debug_types : 1;
430 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
431 of the CU cache it gets reset to NULL again. */
432 struct dwarf2_cu *cu;
434 /* The corresponding objfile. */
435 struct objfile *objfile;
437 /* When using partial symbol tables, the 'psymtab' field is active.
438 Otherwise the 'quick' field is active. */
441 /* The partial symbol table associated with this compilation unit,
442 or NULL for partial units (which do not have an associated
444 struct partial_symtab *psymtab;
446 /* Data needed by the "quick" functions. */
447 struct dwarf2_per_cu_quick_data *quick;
451 /* Entry in the signatured_types hash table. */
453 struct signatured_type
457 /* Offset in .debug_types of the TU (type_unit) for this type. */
460 /* Offset in .debug_types of the type defined by this TU. */
461 unsigned int type_offset;
463 /* The CU(/TU) of this type. */
464 struct dwarf2_per_cu_data per_cu;
467 /* Struct used to pass misc. parameters to read_die_and_children, et
468 al. which are used for both .debug_info and .debug_types dies.
469 All parameters here are unchanging for the life of the call. This
470 struct exists to abstract away the constant parameters of die
473 struct die_reader_specs
475 /* The bfd of this objfile. */
478 /* The CU of the DIE we are parsing. */
479 struct dwarf2_cu *cu;
481 /* Pointer to start of section buffer.
482 This is either the start of .debug_info or .debug_types. */
483 const gdb_byte *buffer;
486 /* The line number information for a compilation unit (found in the
487 .debug_line section) begins with a "statement program header",
488 which contains the following information. */
491 unsigned int total_length;
492 unsigned short version;
493 unsigned int header_length;
494 unsigned char minimum_instruction_length;
495 unsigned char maximum_ops_per_instruction;
496 unsigned char default_is_stmt;
498 unsigned char line_range;
499 unsigned char opcode_base;
501 /* standard_opcode_lengths[i] is the number of operands for the
502 standard opcode whose value is i. This means that
503 standard_opcode_lengths[0] is unused, and the last meaningful
504 element is standard_opcode_lengths[opcode_base - 1]. */
505 unsigned char *standard_opcode_lengths;
507 /* The include_directories table. NOTE! These strings are not
508 allocated with xmalloc; instead, they are pointers into
509 debug_line_buffer. If you try to free them, `free' will get
511 unsigned int num_include_dirs, include_dirs_size;
514 /* The file_names table. NOTE! These strings are not allocated
515 with xmalloc; instead, they are pointers into debug_line_buffer.
516 Don't try to free them directly. */
517 unsigned int num_file_names, file_names_size;
521 unsigned int dir_index;
522 unsigned int mod_time;
524 int included_p; /* Non-zero if referenced by the Line Number Program. */
525 struct symtab *symtab; /* The associated symbol table, if any. */
528 /* The start and end of the statement program following this
529 header. These point into dwarf2_per_objfile->line_buffer. */
530 gdb_byte *statement_program_start, *statement_program_end;
533 /* When we construct a partial symbol table entry we only
534 need this much information. */
535 struct partial_die_info
537 /* Offset of this DIE. */
540 /* DWARF-2 tag for this DIE. */
541 ENUM_BITFIELD(dwarf_tag) tag : 16;
543 /* Assorted flags describing the data found in this DIE. */
544 unsigned int has_children : 1;
545 unsigned int is_external : 1;
546 unsigned int is_declaration : 1;
547 unsigned int has_type : 1;
548 unsigned int has_specification : 1;
549 unsigned int has_pc_info : 1;
551 /* Flag set if the SCOPE field of this structure has been
553 unsigned int scope_set : 1;
555 /* Flag set if the DIE has a byte_size attribute. */
556 unsigned int has_byte_size : 1;
558 /* Flag set if any of the DIE's children are template arguments. */
559 unsigned int has_template_arguments : 1;
561 /* Flag set if fixup_partial_die has been called on this die. */
562 unsigned int fixup_called : 1;
564 /* The name of this DIE. Normally the value of DW_AT_name, but
565 sometimes a default name for unnamed DIEs. */
568 /* The linkage name, if present. */
569 const char *linkage_name;
571 /* The scope to prepend to our children. This is generally
572 allocated on the comp_unit_obstack, so will disappear
573 when this compilation unit leaves the cache. */
576 /* The location description associated with this DIE, if any. */
577 struct dwarf_block *locdesc;
579 /* If HAS_PC_INFO, the PC range associated with this DIE. */
583 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
584 DW_AT_sibling, if any. */
585 /* NOTE: This member isn't strictly necessary, read_partial_die could
586 return DW_AT_sibling values to its caller load_partial_dies. */
589 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
590 DW_AT_specification (or DW_AT_abstract_origin or
592 unsigned int spec_offset;
594 /* Pointers to this DIE's parent, first child, and next sibling,
596 struct partial_die_info *die_parent, *die_child, *die_sibling;
599 /* This data structure holds the information of an abbrev. */
602 unsigned int number; /* number identifying abbrev */
603 enum dwarf_tag tag; /* dwarf tag */
604 unsigned short has_children; /* boolean */
605 unsigned short num_attrs; /* number of attributes */
606 struct attr_abbrev *attrs; /* an array of attribute descriptions */
607 struct abbrev_info *next; /* next in chain */
612 ENUM_BITFIELD(dwarf_attribute) name : 16;
613 ENUM_BITFIELD(dwarf_form) form : 16;
616 /* Attributes have a name and a value. */
619 ENUM_BITFIELD(dwarf_attribute) name : 16;
620 ENUM_BITFIELD(dwarf_form) form : 15;
622 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
623 field should be in u.str (existing only for DW_STRING) but it is kept
624 here for better struct attribute alignment. */
625 unsigned int string_is_canonical : 1;
630 struct dwarf_block *blk;
634 struct signatured_type *signatured_type;
639 /* This data structure holds a complete die structure. */
642 /* DWARF-2 tag for this DIE. */
643 ENUM_BITFIELD(dwarf_tag) tag : 16;
645 /* Number of attributes */
646 unsigned char num_attrs;
648 /* True if we're presently building the full type name for the
649 type derived from this DIE. */
650 unsigned char building_fullname : 1;
655 /* Offset in .debug_info or .debug_types section. */
658 /* The dies in a compilation unit form an n-ary tree. PARENT
659 points to this die's parent; CHILD points to the first child of
660 this node; and all the children of a given node are chained
661 together via their SIBLING fields. */
662 struct die_info *child; /* Its first child, if any. */
663 struct die_info *sibling; /* Its next sibling, if any. */
664 struct die_info *parent; /* Its parent, if any. */
666 /* An array of attributes, with NUM_ATTRS elements. There may be
667 zero, but it's not common and zero-sized arrays are not
668 sufficiently portable C. */
669 struct attribute attrs[1];
672 struct function_range
675 CORE_ADDR lowpc, highpc;
677 struct function_range *next;
680 /* Get at parts of an attribute structure. */
682 #define DW_STRING(attr) ((attr)->u.str)
683 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
684 #define DW_UNSND(attr) ((attr)->u.unsnd)
685 #define DW_BLOCK(attr) ((attr)->u.blk)
686 #define DW_SND(attr) ((attr)->u.snd)
687 #define DW_ADDR(attr) ((attr)->u.addr)
688 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
690 /* Blocks are a bunch of untyped bytes. */
697 #ifndef ATTR_ALLOC_CHUNK
698 #define ATTR_ALLOC_CHUNK 4
701 /* Allocate fields for structs, unions and enums in this size. */
702 #ifndef DW_FIELD_ALLOC_CHUNK
703 #define DW_FIELD_ALLOC_CHUNK 4
706 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
707 but this would require a corresponding change in unpack_field_as_long
709 static int bits_per_byte = 8;
711 /* The routines that read and process dies for a C struct or C++ class
712 pass lists of data member fields and lists of member function fields
713 in an instance of a field_info structure, as defined below. */
716 /* List of data member and baseclasses fields. */
719 struct nextfield *next;
724 *fields, *baseclasses;
726 /* Number of fields (including baseclasses). */
729 /* Number of baseclasses. */
732 /* Set if the accesibility of one of the fields is not public. */
733 int non_public_fields;
735 /* Member function fields array, entries are allocated in the order they
736 are encountered in the object file. */
739 struct nextfnfield *next;
740 struct fn_field fnfield;
744 /* Member function fieldlist array, contains name of possibly overloaded
745 member function, number of overloaded member functions and a pointer
746 to the head of the member function field chain. */
751 struct nextfnfield *head;
755 /* Number of entries in the fnfieldlists array. */
758 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
759 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
760 struct typedef_field_list
762 struct typedef_field field;
763 struct typedef_field_list *next;
766 unsigned typedef_field_list_count;
769 /* One item on the queue of compilation units to read in full symbols
771 struct dwarf2_queue_item
773 struct dwarf2_per_cu_data *per_cu;
774 struct dwarf2_queue_item *next;
777 /* The current queue. */
778 static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail;
780 /* Loaded secondary compilation units are kept in memory until they
781 have not been referenced for the processing of this many
782 compilation units. Set this to zero to disable caching. Cache
783 sizes of up to at least twenty will improve startup time for
784 typical inter-CU-reference binaries, at an obvious memory cost. */
785 static int dwarf2_max_cache_age = 5;
787 show_dwarf2_max_cache_age (struct ui_file *file, int from_tty,
788 struct cmd_list_element *c, const char *value)
790 fprintf_filtered (file, _("The upper bound on the age of cached "
791 "dwarf2 compilation units is %s.\n"),
796 /* Various complaints about symbol reading that don't abort the process. */
799 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
801 complaint (&symfile_complaints,
802 _("statement list doesn't fit in .debug_line section"));
806 dwarf2_debug_line_missing_file_complaint (void)
808 complaint (&symfile_complaints,
809 _(".debug_line section has line data without a file"));
813 dwarf2_debug_line_missing_end_sequence_complaint (void)
815 complaint (&symfile_complaints,
816 _(".debug_line section has line "
817 "program sequence without an end"));
821 dwarf2_complex_location_expr_complaint (void)
823 complaint (&symfile_complaints, _("location expression too complex"));
827 dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
830 complaint (&symfile_complaints,
831 _("const value length mismatch for '%s', got %d, expected %d"),
836 dwarf2_macros_too_long_complaint (void)
838 complaint (&symfile_complaints,
839 _("macro info runs off end of `.debug_macinfo' section"));
843 dwarf2_macro_malformed_definition_complaint (const char *arg1)
845 complaint (&symfile_complaints,
846 _("macro debug info contains a "
847 "malformed macro definition:\n`%s'"),
852 dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
854 complaint (&symfile_complaints,
855 _("invalid attribute class or form for '%s' in '%s'"),
859 /* local function prototypes */
861 static void dwarf2_locate_sections (bfd *, asection *, void *);
863 static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
866 static void dwarf2_build_psymtabs_hard (struct objfile *);
868 static void scan_partial_symbols (struct partial_die_info *,
869 CORE_ADDR *, CORE_ADDR *,
870 int, struct dwarf2_cu *);
872 static void add_partial_symbol (struct partial_die_info *,
875 static void add_partial_namespace (struct partial_die_info *pdi,
876 CORE_ADDR *lowpc, CORE_ADDR *highpc,
877 int need_pc, struct dwarf2_cu *cu);
879 static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
880 CORE_ADDR *highpc, int need_pc,
881 struct dwarf2_cu *cu);
883 static void add_partial_enumeration (struct partial_die_info *enum_pdi,
884 struct dwarf2_cu *cu);
886 static void add_partial_subprogram (struct partial_die_info *pdi,
887 CORE_ADDR *lowpc, CORE_ADDR *highpc,
888 int need_pc, struct dwarf2_cu *cu);
890 static gdb_byte *locate_pdi_sibling (struct partial_die_info *orig_pdi,
891 gdb_byte *buffer, gdb_byte *info_ptr,
892 bfd *abfd, struct dwarf2_cu *cu);
894 static void dwarf2_psymtab_to_symtab (struct partial_symtab *);
896 static void psymtab_to_symtab_1 (struct partial_symtab *);
898 static void dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu);
900 static void dwarf2_free_abbrev_table (void *);
902 static struct abbrev_info *peek_die_abbrev (gdb_byte *, unsigned int *,
905 static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int,
908 static struct partial_die_info *load_partial_dies (bfd *,
909 gdb_byte *, gdb_byte *,
910 int, struct dwarf2_cu *);
912 static gdb_byte *read_partial_die (struct partial_die_info *,
913 struct abbrev_info *abbrev,
915 gdb_byte *, gdb_byte *,
918 static struct partial_die_info *find_partial_die (unsigned int,
921 static void fixup_partial_die (struct partial_die_info *,
924 static gdb_byte *read_attribute (struct attribute *, struct attr_abbrev *,
925 bfd *, gdb_byte *, struct dwarf2_cu *);
927 static gdb_byte *read_attribute_value (struct attribute *, unsigned,
928 bfd *, gdb_byte *, struct dwarf2_cu *);
930 static unsigned int read_1_byte (bfd *, gdb_byte *);
932 static int read_1_signed_byte (bfd *, gdb_byte *);
934 static unsigned int read_2_bytes (bfd *, gdb_byte *);
936 static unsigned int read_4_bytes (bfd *, gdb_byte *);
938 static ULONGEST read_8_bytes (bfd *, gdb_byte *);
940 static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *,
943 static LONGEST read_initial_length (bfd *, gdb_byte *, unsigned int *);
945 static LONGEST read_checked_initial_length_and_offset
946 (bfd *, gdb_byte *, const struct comp_unit_head *,
947 unsigned int *, unsigned int *);
949 static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *,
952 static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int);
954 static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int);
956 static char *read_direct_string (bfd *, gdb_byte *, unsigned int *);
958 static char *read_indirect_string (bfd *, gdb_byte *,
959 const struct comp_unit_head *,
962 static unsigned long read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *);
964 static long read_signed_leb128 (bfd *, gdb_byte *, unsigned int *);
966 static gdb_byte *skip_leb128 (bfd *, gdb_byte *);
968 static void set_cu_language (unsigned int, struct dwarf2_cu *);
970 static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
973 static struct attribute *dwarf2_attr_no_follow (struct die_info *,
977 static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
978 struct dwarf2_cu *cu);
980 static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
982 static struct die_info *die_specification (struct die_info *die,
983 struct dwarf2_cu **);
985 static void free_line_header (struct line_header *lh);
987 static void add_file_name (struct line_header *, char *, unsigned int,
988 unsigned int, unsigned int);
990 static struct line_header *(dwarf_decode_line_header
991 (unsigned int offset,
992 bfd *abfd, struct dwarf2_cu *cu));
994 static void dwarf_decode_lines (struct line_header *, const char *, bfd *,
995 struct dwarf2_cu *, struct partial_symtab *);
997 static void dwarf2_start_subfile (char *, const char *, const char *);
999 static struct symbol *new_symbol (struct die_info *, struct type *,
1000 struct dwarf2_cu *);
1002 static struct symbol *new_symbol_full (struct die_info *, struct type *,
1003 struct dwarf2_cu *, struct symbol *);
1005 static void dwarf2_const_value (struct attribute *, struct symbol *,
1006 struct dwarf2_cu *);
1008 static void dwarf2_const_value_attr (struct attribute *attr,
1011 struct obstack *obstack,
1012 struct dwarf2_cu *cu, long *value,
1014 struct dwarf2_locexpr_baton **baton);
1016 static struct type *die_type (struct die_info *, struct dwarf2_cu *);
1018 static int need_gnat_info (struct dwarf2_cu *);
1020 static struct type *die_descriptive_type (struct die_info *,
1021 struct dwarf2_cu *);
1023 static void set_descriptive_type (struct type *, struct die_info *,
1024 struct dwarf2_cu *);
1026 static struct type *die_containing_type (struct die_info *,
1027 struct dwarf2_cu *);
1029 static struct type *lookup_die_type (struct die_info *, struct attribute *,
1030 struct dwarf2_cu *);
1032 static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
1034 static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *);
1036 static char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
1038 static char *typename_concat (struct obstack *obs, const char *prefix,
1039 const char *suffix, int physname,
1040 struct dwarf2_cu *cu);
1042 static void read_file_scope (struct die_info *, struct dwarf2_cu *);
1044 static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *);
1046 static void read_func_scope (struct die_info *, struct dwarf2_cu *);
1048 static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
1050 static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *,
1051 struct dwarf2_cu *, struct partial_symtab *);
1053 static int dwarf2_get_pc_bounds (struct die_info *,
1054 CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *,
1055 struct partial_symtab *);
1057 static void get_scope_pc_bounds (struct die_info *,
1058 CORE_ADDR *, CORE_ADDR *,
1059 struct dwarf2_cu *);
1061 static void dwarf2_record_block_ranges (struct die_info *, struct block *,
1062 CORE_ADDR, struct dwarf2_cu *);
1064 static void dwarf2_add_field (struct field_info *, struct die_info *,
1065 struct dwarf2_cu *);
1067 static void dwarf2_attach_fields_to_type (struct field_info *,
1068 struct type *, struct dwarf2_cu *);
1070 static void dwarf2_add_member_fn (struct field_info *,
1071 struct die_info *, struct type *,
1072 struct dwarf2_cu *);
1074 static void dwarf2_attach_fn_fields_to_type (struct field_info *,
1076 struct dwarf2_cu *);
1078 static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
1080 static void read_common_block (struct die_info *, struct dwarf2_cu *);
1082 static void read_namespace (struct die_info *die, struct dwarf2_cu *);
1084 static void read_module (struct die_info *die, struct dwarf2_cu *cu);
1086 static void read_import_statement (struct die_info *die, struct dwarf2_cu *);
1088 static struct type *read_module_type (struct die_info *die,
1089 struct dwarf2_cu *cu);
1091 static const char *namespace_name (struct die_info *die,
1092 int *is_anonymous, struct dwarf2_cu *);
1094 static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
1096 static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
1098 static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
1099 struct dwarf2_cu *);
1101 static struct die_info *read_comp_unit (gdb_byte *, struct dwarf2_cu *);
1103 static struct die_info *read_die_and_children_1 (const struct die_reader_specs *reader,
1105 gdb_byte **new_info_ptr,
1106 struct die_info *parent);
1108 static struct die_info *read_die_and_children (const struct die_reader_specs *reader,
1110 gdb_byte **new_info_ptr,
1111 struct die_info *parent);
1113 static struct die_info *read_die_and_siblings (const struct die_reader_specs *reader,
1115 gdb_byte **new_info_ptr,
1116 struct die_info *parent);
1118 static gdb_byte *read_full_die (const struct die_reader_specs *reader,
1119 struct die_info **, gdb_byte *,
1122 static void process_die (struct die_info *, struct dwarf2_cu *);
1124 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu *,
1127 static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
1129 static const char *dwarf2_full_name (char *name,
1130 struct die_info *die,
1131 struct dwarf2_cu *cu);
1133 static struct die_info *dwarf2_extension (struct die_info *die,
1134 struct dwarf2_cu **);
1136 static char *dwarf_tag_name (unsigned int);
1138 static char *dwarf_attr_name (unsigned int);
1140 static char *dwarf_form_name (unsigned int);
1142 static char *dwarf_bool_name (unsigned int);
1144 static char *dwarf_type_encoding_name (unsigned int);
1147 static char *dwarf_cfi_name (unsigned int);
1150 static struct die_info *sibling_die (struct die_info *);
1152 static void dump_die_shallow (struct ui_file *, int indent, struct die_info *);
1154 static void dump_die_for_error (struct die_info *);
1156 static void dump_die_1 (struct ui_file *, int level, int max_level,
1159 /*static*/ void dump_die (struct die_info *, int max_level);
1161 static void store_in_ref_table (struct die_info *,
1162 struct dwarf2_cu *);
1164 static int is_ref_attr (struct attribute *);
1166 static unsigned int dwarf2_get_ref_die_offset (struct attribute *);
1168 static LONGEST dwarf2_get_attr_constant_value (struct attribute *, int);
1170 static struct die_info *follow_die_ref_or_sig (struct die_info *,
1172 struct dwarf2_cu **);
1174 static struct die_info *follow_die_ref (struct die_info *,
1176 struct dwarf2_cu **);
1178 static struct die_info *follow_die_sig (struct die_info *,
1180 struct dwarf2_cu **);
1182 static void read_signatured_type_at_offset (struct objfile *objfile,
1183 unsigned int offset);
1185 static void read_signatured_type (struct objfile *,
1186 struct signatured_type *type_sig);
1188 /* memory allocation interface */
1190 static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
1192 static struct abbrev_info *dwarf_alloc_abbrev (struct dwarf2_cu *);
1194 static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int);
1196 static void initialize_cu_func_list (struct dwarf2_cu *);
1198 static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR,
1199 struct dwarf2_cu *);
1201 static void dwarf_decode_macros (struct line_header *, unsigned int,
1202 char *, bfd *, struct dwarf2_cu *);
1204 static int attr_form_is_block (struct attribute *);
1206 static int attr_form_is_section_offset (struct attribute *);
1208 static int attr_form_is_constant (struct attribute *);
1210 static void fill_in_loclist_baton (struct dwarf2_cu *cu,
1211 struct dwarf2_loclist_baton *baton,
1212 struct attribute *attr);
1214 static void dwarf2_symbol_mark_computed (struct attribute *attr,
1216 struct dwarf2_cu *cu);
1218 static gdb_byte *skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
1219 struct abbrev_info *abbrev,
1220 struct dwarf2_cu *cu);
1222 static void free_stack_comp_unit (void *);
1224 static hashval_t partial_die_hash (const void *item);
1226 static int partial_die_eq (const void *item_lhs, const void *item_rhs);
1228 static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
1229 (unsigned int offset, struct objfile *objfile);
1231 static struct dwarf2_per_cu_data *dwarf2_find_comp_unit
1232 (unsigned int offset, struct objfile *objfile);
1234 static void init_one_comp_unit (struct dwarf2_cu *cu,
1235 struct objfile *objfile);
1237 static void prepare_one_comp_unit (struct dwarf2_cu *cu,
1238 struct die_info *comp_unit_die);
1240 static void free_one_comp_unit (void *);
1242 static void free_cached_comp_units (void *);
1244 static void age_cached_comp_units (void);
1246 static void free_one_cached_comp_unit (void *);
1248 static struct type *set_die_type (struct die_info *, struct type *,
1249 struct dwarf2_cu *);
1251 static void create_all_comp_units (struct objfile *);
1253 static int create_debug_types_hash_table (struct objfile *objfile);
1255 static void load_full_comp_unit (struct dwarf2_per_cu_data *,
1258 static void process_full_comp_unit (struct dwarf2_per_cu_data *);
1260 static void dwarf2_add_dependence (struct dwarf2_cu *,
1261 struct dwarf2_per_cu_data *);
1263 static void dwarf2_mark (struct dwarf2_cu *);
1265 static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
1267 static struct type *get_die_type_at_offset (unsigned int,
1268 struct dwarf2_per_cu_data *per_cu);
1270 static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu);
1272 static void dwarf2_release_queue (void *dummy);
1274 static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu,
1275 struct objfile *objfile);
1277 static void process_queue (struct objfile *objfile);
1279 static void find_file_and_directory (struct die_info *die,
1280 struct dwarf2_cu *cu,
1281 char **name, char **comp_dir);
1283 static char *file_full_name (int file, struct line_header *lh,
1284 const char *comp_dir);
1286 static gdb_byte *partial_read_comp_unit_head (struct comp_unit_head *header,
1289 unsigned int buffer_size,
1292 static void init_cu_die_reader (struct die_reader_specs *reader,
1293 struct dwarf2_cu *cu);
1295 static htab_t allocate_signatured_type_table (struct objfile *objfile);
1299 /* Convert VALUE between big- and little-endian. */
1301 byte_swap (offset_type value)
1305 result = (value & 0xff) << 24;
1306 result |= (value & 0xff00) << 8;
1307 result |= (value & 0xff0000) >> 8;
1308 result |= (value & 0xff000000) >> 24;
1312 #define MAYBE_SWAP(V) byte_swap (V)
1315 #define MAYBE_SWAP(V) (V)
1316 #endif /* WORDS_BIGENDIAN */
1318 /* The suffix for an index file. */
1319 #define INDEX_SUFFIX ".gdb-index"
1321 static const char *dwarf2_physname (char *name, struct die_info *die,
1322 struct dwarf2_cu *cu);
1324 /* Try to locate the sections we need for DWARF 2 debugging
1325 information and return true if we have enough to do something. */
1328 dwarf2_has_info (struct objfile *objfile)
1330 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
1331 if (!dwarf2_per_objfile)
1333 /* Initialize per-objfile state. */
1334 struct dwarf2_per_objfile *data
1335 = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
1337 memset (data, 0, sizeof (*data));
1338 set_objfile_data (objfile, dwarf2_objfile_data_key, data);
1339 dwarf2_per_objfile = data;
1341 bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL);
1342 dwarf2_per_objfile->objfile = objfile;
1344 return (dwarf2_per_objfile->info.asection != NULL
1345 && dwarf2_per_objfile->abbrev.asection != NULL);
1348 /* When loading sections, we can either look for ".<name>", or for
1349 * ".z<name>", which indicates a compressed section. */
1352 section_is_p (const char *section_name, const char *name)
1354 return (section_name[0] == '.'
1355 && (strcmp (section_name + 1, name) == 0
1356 || (section_name[1] == 'z'
1357 && strcmp (section_name + 2, name) == 0)));
1360 /* This function is mapped across the sections and remembers the
1361 offset and size of each of the debugging sections we are interested
1365 dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr)
1367 if (section_is_p (sectp->name, INFO_SECTION))
1369 dwarf2_per_objfile->info.asection = sectp;
1370 dwarf2_per_objfile->info.size = bfd_get_section_size (sectp);
1372 else if (section_is_p (sectp->name, ABBREV_SECTION))
1374 dwarf2_per_objfile->abbrev.asection = sectp;
1375 dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp);
1377 else if (section_is_p (sectp->name, LINE_SECTION))
1379 dwarf2_per_objfile->line.asection = sectp;
1380 dwarf2_per_objfile->line.size = bfd_get_section_size (sectp);
1382 else if (section_is_p (sectp->name, LOC_SECTION))
1384 dwarf2_per_objfile->loc.asection = sectp;
1385 dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp);
1387 else if (section_is_p (sectp->name, MACINFO_SECTION))
1389 dwarf2_per_objfile->macinfo.asection = sectp;
1390 dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp);
1392 else if (section_is_p (sectp->name, STR_SECTION))
1394 dwarf2_per_objfile->str.asection = sectp;
1395 dwarf2_per_objfile->str.size = bfd_get_section_size (sectp);
1397 else if (section_is_p (sectp->name, FRAME_SECTION))
1399 dwarf2_per_objfile->frame.asection = sectp;
1400 dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp);
1402 else if (section_is_p (sectp->name, EH_FRAME_SECTION))
1404 flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
1406 if (aflag & SEC_HAS_CONTENTS)
1408 dwarf2_per_objfile->eh_frame.asection = sectp;
1409 dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp);
1412 else if (section_is_p (sectp->name, RANGES_SECTION))
1414 dwarf2_per_objfile->ranges.asection = sectp;
1415 dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp);
1417 else if (section_is_p (sectp->name, TYPES_SECTION))
1419 dwarf2_per_objfile->types.asection = sectp;
1420 dwarf2_per_objfile->types.size = bfd_get_section_size (sectp);
1422 else if (section_is_p (sectp->name, GDB_INDEX_SECTION))
1424 dwarf2_per_objfile->gdb_index.asection = sectp;
1425 dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp);
1428 if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
1429 && bfd_section_vma (abfd, sectp) == 0)
1430 dwarf2_per_objfile->has_section_at_zero = 1;
1433 /* Decompress a section that was compressed using zlib. Store the
1434 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1437 zlib_decompress_section (struct objfile *objfile, asection *sectp,
1438 gdb_byte **outbuf, bfd_size_type *outsize)
1440 bfd *abfd = objfile->obfd;
1442 error (_("Support for zlib-compressed DWARF data (from '%s') "
1443 "is disabled in this copy of GDB"),
1444 bfd_get_filename (abfd));
1446 bfd_size_type compressed_size = bfd_get_section_size (sectp);
1447 gdb_byte *compressed_buffer = xmalloc (compressed_size);
1448 struct cleanup *cleanup = make_cleanup (xfree, compressed_buffer);
1449 bfd_size_type uncompressed_size;
1450 gdb_byte *uncompressed_buffer;
1453 int header_size = 12;
1455 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1456 || bfd_bread (compressed_buffer,
1457 compressed_size, abfd) != compressed_size)
1458 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1459 bfd_get_filename (abfd));
1461 /* Read the zlib header. In this case, it should be "ZLIB" followed
1462 by the uncompressed section size, 8 bytes in big-endian order. */
1463 if (compressed_size < header_size
1464 || strncmp (compressed_buffer, "ZLIB", 4) != 0)
1465 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1466 bfd_get_filename (abfd));
1467 uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8;
1468 uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8;
1469 uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8;
1470 uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8;
1471 uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8;
1472 uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8;
1473 uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8;
1474 uncompressed_size += compressed_buffer[11];
1476 /* It is possible the section consists of several compressed
1477 buffers concatenated together, so we uncompress in a loop. */
1481 strm.avail_in = compressed_size - header_size;
1482 strm.next_in = (Bytef*) compressed_buffer + header_size;
1483 strm.avail_out = uncompressed_size;
1484 uncompressed_buffer = obstack_alloc (&objfile->objfile_obstack,
1486 rc = inflateInit (&strm);
1487 while (strm.avail_in > 0)
1490 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1491 bfd_get_filename (abfd), rc);
1492 strm.next_out = ((Bytef*) uncompressed_buffer
1493 + (uncompressed_size - strm.avail_out));
1494 rc = inflate (&strm, Z_FINISH);
1495 if (rc != Z_STREAM_END)
1496 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1497 bfd_get_filename (abfd), rc);
1498 rc = inflateReset (&strm);
1500 rc = inflateEnd (&strm);
1502 || strm.avail_out != 0)
1503 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1504 bfd_get_filename (abfd), rc);
1506 do_cleanups (cleanup);
1507 *outbuf = uncompressed_buffer;
1508 *outsize = uncompressed_size;
1512 /* A helper function that decides whether a section is empty. */
1515 dwarf2_section_empty_p (struct dwarf2_section_info *info)
1517 return info->asection == NULL || info->size == 0;
1520 /* Read the contents of the section SECTP from object file specified by
1521 OBJFILE, store info about the section into INFO.
1522 If the section is compressed, uncompress it before returning. */
1525 dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info)
1527 bfd *abfd = objfile->obfd;
1528 asection *sectp = info->asection;
1529 gdb_byte *buf, *retbuf;
1530 unsigned char header[4];
1534 info->buffer = NULL;
1535 info->was_mmapped = 0;
1538 if (dwarf2_section_empty_p (info))
1541 /* Check if the file has a 4-byte header indicating compression. */
1542 if (info->size > sizeof (header)
1543 && bfd_seek (abfd, sectp->filepos, SEEK_SET) == 0
1544 && bfd_bread (header, sizeof (header), abfd) == sizeof (header))
1546 /* Upon decompression, update the buffer and its size. */
1547 if (strncmp (header, "ZLIB", sizeof (header)) == 0)
1549 zlib_decompress_section (objfile, sectp, &info->buffer,
1557 pagesize = getpagesize ();
1559 /* Only try to mmap sections which are large enough: we don't want to
1560 waste space due to fragmentation. Also, only try mmap for sections
1561 without relocations. */
1563 if (info->size > 4 * pagesize && (sectp->flags & SEC_RELOC) == 0)
1565 off_t pg_offset = sectp->filepos & ~(pagesize - 1);
1566 size_t map_length = info->size + sectp->filepos - pg_offset;
1567 caddr_t retbuf = bfd_mmap (abfd, 0, map_length, PROT_READ,
1568 MAP_PRIVATE, pg_offset);
1570 if (retbuf != MAP_FAILED)
1572 info->was_mmapped = 1;
1573 info->buffer = retbuf + (sectp->filepos & (pagesize - 1)) ;
1574 #if HAVE_POSIX_MADVISE
1575 posix_madvise (retbuf, map_length, POSIX_MADV_WILLNEED);
1582 /* If we get here, we are a normal, not-compressed section. */
1584 = obstack_alloc (&objfile->objfile_obstack, info->size);
1586 /* When debugging .o files, we may need to apply relocations; see
1587 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1588 We never compress sections in .o files, so we only need to
1589 try this when the section is not compressed. */
1590 retbuf = symfile_relocate_debug_section (objfile, sectp, buf);
1593 info->buffer = retbuf;
1597 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1598 || bfd_bread (buf, info->size, abfd) != info->size)
1599 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1600 bfd_get_filename (abfd));
1603 /* A helper function that returns the size of a section in a safe way.
1604 If you are positive that the section has been read before using the
1605 size, then it is safe to refer to the dwarf2_section_info object's
1606 "size" field directly. In other cases, you must call this
1607 function, because for compressed sections the size field is not set
1608 correctly until the section has been read. */
1610 static bfd_size_type
1611 dwarf2_section_size (struct objfile *objfile,
1612 struct dwarf2_section_info *info)
1615 dwarf2_read_section (objfile, info);
1619 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1623 dwarf2_get_section_info (struct objfile *objfile, const char *section_name,
1624 asection **sectp, gdb_byte **bufp,
1625 bfd_size_type *sizep)
1627 struct dwarf2_per_objfile *data
1628 = objfile_data (objfile, dwarf2_objfile_data_key);
1629 struct dwarf2_section_info *info;
1631 /* We may see an objfile without any DWARF, in which case we just
1640 if (section_is_p (section_name, EH_FRAME_SECTION))
1641 info = &data->eh_frame;
1642 else if (section_is_p (section_name, FRAME_SECTION))
1643 info = &data->frame;
1645 gdb_assert_not_reached ("unexpected section");
1647 dwarf2_read_section (objfile, info);
1649 *sectp = info->asection;
1650 *bufp = info->buffer;
1651 *sizep = info->size;
1655 /* DWARF quick_symbols_functions support. */
1657 /* TUs can share .debug_line entries, and there can be a lot more TUs than
1658 unique line tables, so we maintain a separate table of all .debug_line
1659 derived entries to support the sharing.
1660 All the quick functions need is the list of file names. We discard the
1661 line_header when we're done and don't need to record it here. */
1662 struct quick_file_names
1664 /* The offset in .debug_line of the line table. We hash on this. */
1665 unsigned int offset;
1667 /* The number of entries in file_names, real_names. */
1668 unsigned int num_file_names;
1670 /* The file names from the line table, after being run through
1672 const char **file_names;
1674 /* The file names from the line table after being run through
1675 gdb_realpath. These are computed lazily. */
1676 const char **real_names;
1679 /* When using the index (and thus not using psymtabs), each CU has an
1680 object of this type. This is used to hold information needed by
1681 the various "quick" methods. */
1682 struct dwarf2_per_cu_quick_data
1684 /* The file table. This can be NULL if there was no file table
1685 or it's currently not read in.
1686 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
1687 struct quick_file_names *file_names;
1689 /* The corresponding symbol table. This is NULL if symbols for this
1690 CU have not yet been read. */
1691 struct symtab *symtab;
1693 /* A temporary mark bit used when iterating over all CUs in
1694 expand_symtabs_matching. */
1695 unsigned int mark : 1;
1697 /* True if we've tried to read the file table and found there isn't one.
1698 There will be no point in trying to read it again next time. */
1699 unsigned int no_file_data : 1;
1702 /* Hash function for a quick_file_names. */
1705 hash_file_name_entry (const void *e)
1707 const struct quick_file_names *file_data = e;
1709 return file_data->offset;
1712 /* Equality function for a quick_file_names. */
1715 eq_file_name_entry (const void *a, const void *b)
1717 const struct quick_file_names *ea = a;
1718 const struct quick_file_names *eb = b;
1720 return ea->offset == eb->offset;
1723 /* Delete function for a quick_file_names. */
1726 delete_file_name_entry (void *e)
1728 struct quick_file_names *file_data = e;
1731 for (i = 0; i < file_data->num_file_names; ++i)
1733 xfree ((void*) file_data->file_names[i]);
1734 if (file_data->real_names)
1735 xfree ((void*) file_data->real_names[i]);
1738 /* The space for the struct itself lives on objfile_obstack,
1739 so we don't free it here. */
1742 /* Create a quick_file_names hash table. */
1745 create_quick_file_names_table (unsigned int nr_initial_entries)
1747 return htab_create_alloc (nr_initial_entries,
1748 hash_file_name_entry, eq_file_name_entry,
1749 delete_file_name_entry, xcalloc, xfree);
1752 /* Read in the symbols for PER_CU. OBJFILE is the objfile from which
1756 dw2_do_instantiate_symtab (struct objfile *objfile,
1757 struct dwarf2_per_cu_data *per_cu)
1759 struct cleanup *back_to;
1761 back_to = make_cleanup (dwarf2_release_queue, NULL);
1763 queue_comp_unit (per_cu, objfile);
1765 if (per_cu->from_debug_types)
1766 read_signatured_type_at_offset (objfile, per_cu->offset);
1768 load_full_comp_unit (per_cu, objfile);
1770 process_queue (objfile);
1772 /* Age the cache, releasing compilation units that have not
1773 been used recently. */
1774 age_cached_comp_units ();
1776 do_cleanups (back_to);
1779 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
1780 the objfile from which this CU came. Returns the resulting symbol
1783 static struct symtab *
1784 dw2_instantiate_symtab (struct objfile *objfile,
1785 struct dwarf2_per_cu_data *per_cu)
1787 if (!per_cu->v.quick->symtab)
1789 struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL);
1790 increment_reading_symtab ();
1791 dw2_do_instantiate_symtab (objfile, per_cu);
1792 do_cleanups (back_to);
1794 return per_cu->v.quick->symtab;
1797 /* Return the CU given its index. */
1799 static struct dwarf2_per_cu_data *
1800 dw2_get_cu (int index)
1802 if (index >= dwarf2_per_objfile->n_comp_units)
1804 index -= dwarf2_per_objfile->n_comp_units;
1805 return dwarf2_per_objfile->type_comp_units[index];
1807 return dwarf2_per_objfile->all_comp_units[index];
1810 /* A helper function that knows how to read a 64-bit value in a way
1811 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
1815 extract_cu_value (const char *bytes, ULONGEST *result)
1817 if (sizeof (ULONGEST) < 8)
1821 /* Ignore the upper 4 bytes if they are all zero. */
1822 for (i = 0; i < 4; ++i)
1823 if (bytes[i + 4] != 0)
1826 *result = extract_unsigned_integer (bytes, 4, BFD_ENDIAN_LITTLE);
1829 *result = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE);
1833 /* Read the CU list from the mapped index, and use it to create all
1834 the CU objects for this objfile. Return 0 if something went wrong,
1835 1 if everything went ok. */
1838 create_cus_from_index (struct objfile *objfile, const gdb_byte *cu_list,
1839 offset_type cu_list_elements)
1843 dwarf2_per_objfile->n_comp_units = cu_list_elements / 2;
1844 dwarf2_per_objfile->all_comp_units
1845 = obstack_alloc (&objfile->objfile_obstack,
1846 dwarf2_per_objfile->n_comp_units
1847 * sizeof (struct dwarf2_per_cu_data *));
1849 for (i = 0; i < cu_list_elements; i += 2)
1851 struct dwarf2_per_cu_data *the_cu;
1852 ULONGEST offset, length;
1854 if (!extract_cu_value (cu_list, &offset)
1855 || !extract_cu_value (cu_list + 8, &length))
1859 the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack,
1860 struct dwarf2_per_cu_data);
1861 the_cu->offset = offset;
1862 the_cu->length = length;
1863 the_cu->objfile = objfile;
1864 the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
1865 struct dwarf2_per_cu_quick_data);
1866 dwarf2_per_objfile->all_comp_units[i / 2] = the_cu;
1872 /* Create the signatured type hash table from the index. */
1875 create_signatured_type_table_from_index (struct objfile *objfile,
1876 const gdb_byte *bytes,
1877 offset_type elements)
1880 htab_t sig_types_hash;
1882 dwarf2_per_objfile->n_type_comp_units = elements / 3;
1883 dwarf2_per_objfile->type_comp_units
1884 = obstack_alloc (&objfile->objfile_obstack,
1885 dwarf2_per_objfile->n_type_comp_units
1886 * sizeof (struct dwarf2_per_cu_data *));
1888 sig_types_hash = allocate_signatured_type_table (objfile);
1890 for (i = 0; i < elements; i += 3)
1892 struct signatured_type *type_sig;
1893 ULONGEST offset, type_offset, signature;
1896 if (!extract_cu_value (bytes, &offset)
1897 || !extract_cu_value (bytes + 8, &type_offset))
1899 signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE);
1902 type_sig = OBSTACK_ZALLOC (&objfile->objfile_obstack,
1903 struct signatured_type);
1904 type_sig->signature = signature;
1905 type_sig->offset = offset;
1906 type_sig->type_offset = type_offset;
1907 type_sig->per_cu.from_debug_types = 1;
1908 type_sig->per_cu.offset = offset;
1909 type_sig->per_cu.objfile = objfile;
1910 type_sig->per_cu.v.quick
1911 = OBSTACK_ZALLOC (&objfile->objfile_obstack,
1912 struct dwarf2_per_cu_quick_data);
1914 slot = htab_find_slot (sig_types_hash, type_sig, INSERT);
1917 dwarf2_per_objfile->type_comp_units[i / 3] = &type_sig->per_cu;
1920 dwarf2_per_objfile->signatured_types = sig_types_hash;
1925 /* Read the address map data from the mapped index, and use it to
1926 populate the objfile's psymtabs_addrmap. */
1929 create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index)
1931 const gdb_byte *iter, *end;
1932 struct obstack temp_obstack;
1933 struct addrmap *mutable_map;
1934 struct cleanup *cleanup;
1937 obstack_init (&temp_obstack);
1938 cleanup = make_cleanup_obstack_free (&temp_obstack);
1939 mutable_map = addrmap_create_mutable (&temp_obstack);
1941 iter = index->address_table;
1942 end = iter + index->address_table_size;
1944 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1948 ULONGEST hi, lo, cu_index;
1949 lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
1951 hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
1953 cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE);
1956 addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1,
1957 dw2_get_cu (cu_index));
1960 objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map,
1961 &objfile->objfile_obstack);
1962 do_cleanups (cleanup);
1965 /* The hash function for strings in the mapped index. This is the
1966 same as the hashtab.c hash function, but we keep a separate copy to
1967 maintain control over the implementation. This is necessary
1968 because the hash function is tied to the format of the mapped index
1972 mapped_index_string_hash (const void *p)
1974 const unsigned char *str = (const unsigned char *) p;
1978 while ((c = *str++) != 0)
1979 r = r * 67 + c - 113;
1984 /* Find a slot in the mapped index INDEX for the object named NAME.
1985 If NAME is found, set *VEC_OUT to point to the CU vector in the
1986 constant pool and return 1. If NAME cannot be found, return 0. */
1989 find_slot_in_mapped_hash (struct mapped_index *index, const char *name,
1990 offset_type **vec_out)
1992 offset_type hash = mapped_index_string_hash (name);
1993 offset_type slot, step;
1995 slot = hash & (index->symbol_table_slots - 1);
1996 step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1;
2000 /* Convert a slot number to an offset into the table. */
2001 offset_type i = 2 * slot;
2003 if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0)
2006 str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]);
2007 if (!strcmp (name, str))
2009 *vec_out = (offset_type *) (index->constant_pool
2010 + MAYBE_SWAP (index->symbol_table[i + 1]));
2014 slot = (slot + step) & (index->symbol_table_slots - 1);
2018 /* Read the index file. If everything went ok, initialize the "quick"
2019 elements of all the CUs and return 1. Otherwise, return 0. */
2022 dwarf2_read_index (struct objfile *objfile)
2025 struct mapped_index *map;
2026 offset_type *metadata;
2027 const gdb_byte *cu_list;
2028 const gdb_byte *types_list = NULL;
2029 offset_type version, cu_list_elements;
2030 offset_type types_list_elements = 0;
2033 if (dwarf2_section_empty_p (&dwarf2_per_objfile->gdb_index))
2036 /* Older elfutils strip versions could keep the section in the main
2037 executable while splitting it for the separate debug info file. */
2038 if ((bfd_get_file_flags (dwarf2_per_objfile->gdb_index.asection)
2039 & SEC_HAS_CONTENTS) == 0)
2042 dwarf2_read_section (objfile, &dwarf2_per_objfile->gdb_index);
2044 addr = dwarf2_per_objfile->gdb_index.buffer;
2045 /* Version check. */
2046 version = MAYBE_SWAP (*(offset_type *) addr);
2047 /* Versions earlier than 3 emitted every copy of a psymbol. This
2048 causes the index to behave very poorly for certain requests. Version 4
2049 contained incomplete addrmap. So, it seems better to just ignore such
2053 /* Indexes with higher version than the one supported by GDB may be no
2054 longer backward compatible. */
2058 map = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct mapped_index);
2059 map->total_size = dwarf2_per_objfile->gdb_index.size;
2061 metadata = (offset_type *) (addr + sizeof (offset_type));
2064 cu_list = addr + MAYBE_SWAP (metadata[i]);
2065 cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i]))
2069 types_list = addr + MAYBE_SWAP (metadata[i]);
2070 types_list_elements = ((MAYBE_SWAP (metadata[i + 1])
2071 - MAYBE_SWAP (metadata[i]))
2075 map->address_table = addr + MAYBE_SWAP (metadata[i]);
2076 map->address_table_size = (MAYBE_SWAP (metadata[i + 1])
2077 - MAYBE_SWAP (metadata[i]));
2080 map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i]));
2081 map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1])
2082 - MAYBE_SWAP (metadata[i]))
2083 / (2 * sizeof (offset_type)));
2086 map->constant_pool = addr + MAYBE_SWAP (metadata[i]);
2088 if (!create_cus_from_index (objfile, cu_list, cu_list_elements))
2091 if (types_list_elements
2092 && !create_signatured_type_table_from_index (objfile, types_list,
2093 types_list_elements))
2096 create_addrmap_from_index (objfile, map);
2098 dwarf2_per_objfile->index_table = map;
2099 dwarf2_per_objfile->using_index = 1;
2100 dwarf2_per_objfile->quick_file_names_table =
2101 create_quick_file_names_table (dwarf2_per_objfile->n_comp_units);
2106 /* A helper for the "quick" functions which sets the global
2107 dwarf2_per_objfile according to OBJFILE. */
2110 dw2_setup (struct objfile *objfile)
2112 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
2113 gdb_assert (dwarf2_per_objfile);
2116 /* A helper for the "quick" functions which attempts to read the line
2117 table for THIS_CU. */
2119 static struct quick_file_names *
2120 dw2_get_file_names (struct objfile *objfile,
2121 struct dwarf2_per_cu_data *this_cu)
2123 bfd *abfd = objfile->obfd;
2124 struct line_header *lh;
2125 struct attribute *attr;
2126 struct cleanup *cleanups;
2127 struct die_info *comp_unit_die;
2128 struct dwarf2_section_info* sec;
2129 gdb_byte *beg_of_comp_unit, *info_ptr, *buffer;
2130 int has_children, i;
2131 struct dwarf2_cu cu;
2132 unsigned int bytes_read, buffer_size;
2133 struct die_reader_specs reader_specs;
2134 char *name, *comp_dir;
2136 struct quick_file_names *qfn;
2137 unsigned int line_offset;
2139 if (this_cu->v.quick->file_names != NULL)
2140 return this_cu->v.quick->file_names;
2141 /* If we know there is no line data, no point in looking again. */
2142 if (this_cu->v.quick->no_file_data)
2145 init_one_comp_unit (&cu, objfile);
2146 cleanups = make_cleanup (free_stack_comp_unit, &cu);
2148 if (this_cu->from_debug_types)
2149 sec = &dwarf2_per_objfile->types;
2151 sec = &dwarf2_per_objfile->info;
2152 dwarf2_read_section (objfile, sec);
2153 buffer_size = sec->size;
2154 buffer = sec->buffer;
2155 info_ptr = buffer + this_cu->offset;
2156 beg_of_comp_unit = info_ptr;
2158 info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
2159 buffer, buffer_size,
2162 /* Complete the cu_header. */
2163 cu.header.offset = beg_of_comp_unit - buffer;
2164 cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
2167 cu.per_cu = this_cu;
2169 dwarf2_read_abbrevs (abfd, &cu);
2170 make_cleanup (dwarf2_free_abbrev_table, &cu);
2172 if (this_cu->from_debug_types)
2173 info_ptr += 8 /*signature*/ + cu.header.offset_size;
2174 init_cu_die_reader (&reader_specs, &cu);
2175 read_full_die (&reader_specs, &comp_unit_die, info_ptr,
2181 attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, &cu);
2184 struct quick_file_names find_entry;
2186 line_offset = DW_UNSND (attr);
2188 /* We may have already read in this line header (TU line header sharing).
2189 If we have we're done. */
2190 find_entry.offset = line_offset;
2191 slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table,
2192 &find_entry, INSERT);
2195 do_cleanups (cleanups);
2196 this_cu->v.quick->file_names = *slot;
2200 lh = dwarf_decode_line_header (line_offset, abfd, &cu);
2204 do_cleanups (cleanups);
2205 this_cu->v.quick->no_file_data = 1;
2209 qfn = obstack_alloc (&objfile->objfile_obstack, sizeof (*qfn));
2210 qfn->offset = line_offset;
2211 gdb_assert (slot != NULL);
2214 find_file_and_directory (comp_unit_die, &cu, &name, &comp_dir);
2216 qfn->num_file_names = lh->num_file_names;
2217 qfn->file_names = obstack_alloc (&objfile->objfile_obstack,
2218 lh->num_file_names * sizeof (char *));
2219 for (i = 0; i < lh->num_file_names; ++i)
2220 qfn->file_names[i] = file_full_name (i + 1, lh, comp_dir);
2221 qfn->real_names = NULL;
2223 free_line_header (lh);
2224 do_cleanups (cleanups);
2226 this_cu->v.quick->file_names = qfn;
2230 /* A helper for the "quick" functions which computes and caches the
2231 real path for a given file name from the line table. */
2234 dw2_get_real_path (struct objfile *objfile,
2235 struct quick_file_names *qfn, int index)
2237 if (qfn->real_names == NULL)
2238 qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack,
2239 qfn->num_file_names, sizeof (char *));
2241 if (qfn->real_names[index] == NULL)
2242 qfn->real_names[index] = gdb_realpath (qfn->file_names[index]);
2244 return qfn->real_names[index];
2247 static struct symtab *
2248 dw2_find_last_source_symtab (struct objfile *objfile)
2252 dw2_setup (objfile);
2253 index = dwarf2_per_objfile->n_comp_units - 1;
2254 return dw2_instantiate_symtab (objfile, dw2_get_cu (index));
2257 /* Traversal function for dw2_forget_cached_source_info. */
2260 dw2_free_cached_file_names (void **slot, void *info)
2262 struct quick_file_names *file_data = (struct quick_file_names *) *slot;
2264 if (file_data->real_names)
2268 for (i = 0; i < file_data->num_file_names; ++i)
2270 xfree ((void*) file_data->real_names[i]);
2271 file_data->real_names[i] = NULL;
2279 dw2_forget_cached_source_info (struct objfile *objfile)
2281 dw2_setup (objfile);
2283 htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table,
2284 dw2_free_cached_file_names, NULL);
2288 dw2_lookup_symtab (struct objfile *objfile, const char *name,
2289 const char *full_path, const char *real_path,
2290 struct symtab **result)
2293 int check_basename = lbasename (name) == name;
2294 struct dwarf2_per_cu_data *base_cu = NULL;
2296 dw2_setup (objfile);
2298 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2299 + dwarf2_per_objfile->n_type_comp_units); ++i)
2302 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2303 struct quick_file_names *file_data;
2305 if (per_cu->v.quick->symtab)
2308 file_data = dw2_get_file_names (objfile, per_cu);
2309 if (file_data == NULL)
2312 for (j = 0; j < file_data->num_file_names; ++j)
2314 const char *this_name = file_data->file_names[j];
2316 if (FILENAME_CMP (name, this_name) == 0)
2318 *result = dw2_instantiate_symtab (objfile, per_cu);
2322 if (check_basename && ! base_cu
2323 && FILENAME_CMP (lbasename (this_name), name) == 0)
2326 if (full_path != NULL)
2328 const char *this_real_name = dw2_get_real_path (objfile,
2331 if (this_real_name != NULL
2332 && FILENAME_CMP (full_path, this_real_name) == 0)
2334 *result = dw2_instantiate_symtab (objfile, per_cu);
2339 if (real_path != NULL)
2341 const char *this_real_name = dw2_get_real_path (objfile,
2344 if (this_real_name != NULL
2345 && FILENAME_CMP (real_path, this_real_name) == 0)
2347 *result = dw2_instantiate_symtab (objfile, per_cu);
2356 *result = dw2_instantiate_symtab (objfile, base_cu);
2363 static struct symtab *
2364 dw2_lookup_symbol (struct objfile *objfile, int block_index,
2365 const char *name, domain_enum domain)
2367 /* We do all the work in the pre_expand_symtabs_matching hook
2372 /* A helper function that expands all symtabs that hold an object
2376 dw2_do_expand_symtabs_matching (struct objfile *objfile, const char *name)
2378 dw2_setup (objfile);
2380 /* index_table is NULL if OBJF_READNOW. */
2381 if (dwarf2_per_objfile->index_table)
2385 if (find_slot_in_mapped_hash (dwarf2_per_objfile->index_table,
2388 offset_type i, len = MAYBE_SWAP (*vec);
2389 for (i = 0; i < len; ++i)
2391 offset_type cu_index = MAYBE_SWAP (vec[i + 1]);
2392 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (cu_index);
2394 dw2_instantiate_symtab (objfile, per_cu);
2401 dw2_pre_expand_symtabs_matching (struct objfile *objfile,
2402 int kind, const char *name,
2405 dw2_do_expand_symtabs_matching (objfile, name);
2409 dw2_print_stats (struct objfile *objfile)
2413 dw2_setup (objfile);
2415 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2416 + dwarf2_per_objfile->n_type_comp_units); ++i)
2418 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2420 if (!per_cu->v.quick->symtab)
2423 printf_filtered (_(" Number of unread CUs: %d\n"), count);
2427 dw2_dump (struct objfile *objfile)
2429 /* Nothing worth printing. */
2433 dw2_relocate (struct objfile *objfile, struct section_offsets *new_offsets,
2434 struct section_offsets *delta)
2436 /* There's nothing to relocate here. */
2440 dw2_expand_symtabs_for_function (struct objfile *objfile,
2441 const char *func_name)
2443 dw2_do_expand_symtabs_matching (objfile, func_name);
2447 dw2_expand_all_symtabs (struct objfile *objfile)
2451 dw2_setup (objfile);
2453 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2454 + dwarf2_per_objfile->n_type_comp_units); ++i)
2456 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2458 dw2_instantiate_symtab (objfile, per_cu);
2463 dw2_expand_symtabs_with_filename (struct objfile *objfile,
2464 const char *filename)
2468 dw2_setup (objfile);
2470 /* We don't need to consider type units here.
2471 This is only called for examining code, e.g. expand_line_sal.
2472 There can be an order of magnitude (or more) more type units
2473 than comp units, and we avoid them if we can. */
2475 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
2478 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2479 struct quick_file_names *file_data;
2481 if (per_cu->v.quick->symtab)
2484 file_data = dw2_get_file_names (objfile, per_cu);
2485 if (file_data == NULL)
2488 for (j = 0; j < file_data->num_file_names; ++j)
2490 const char *this_name = file_data->file_names[j];
2491 if (FILENAME_CMP (this_name, filename) == 0)
2493 dw2_instantiate_symtab (objfile, per_cu);
2501 dw2_find_symbol_file (struct objfile *objfile, const char *name)
2503 struct dwarf2_per_cu_data *per_cu;
2505 struct quick_file_names *file_data;
2507 dw2_setup (objfile);
2509 /* index_table is NULL if OBJF_READNOW. */
2510 if (!dwarf2_per_objfile->index_table)
2513 if (!find_slot_in_mapped_hash (dwarf2_per_objfile->index_table,
2517 /* Note that this just looks at the very first one named NAME -- but
2518 actually we are looking for a function. find_main_filename
2519 should be rewritten so that it doesn't require a custom hook. It
2520 could just use the ordinary symbol tables. */
2521 /* vec[0] is the length, which must always be >0. */
2522 per_cu = dw2_get_cu (MAYBE_SWAP (vec[1]));
2524 file_data = dw2_get_file_names (objfile, per_cu);
2525 if (file_data == NULL)
2528 return file_data->file_names[file_data->num_file_names - 1];
2532 dw2_map_matching_symbols (const char * name, domain_enum namespace,
2533 struct objfile *objfile, int global,
2534 int (*callback) (struct block *,
2535 struct symbol *, void *),
2536 void *data, symbol_compare_ftype *match,
2537 symbol_compare_ftype *ordered_compare)
2539 /* Currently unimplemented; used for Ada. The function can be called if the
2540 current language is Ada for a non-Ada objfile using GNU index. As Ada
2541 does not look for non-Ada symbols this function should just return. */
2545 dw2_expand_symtabs_matching (struct objfile *objfile,
2546 int (*file_matcher) (const char *, void *),
2547 int (*name_matcher) (const char *, void *),
2553 struct mapped_index *index;
2555 dw2_setup (objfile);
2557 /* index_table is NULL if OBJF_READNOW. */
2558 if (!dwarf2_per_objfile->index_table)
2560 index = dwarf2_per_objfile->index_table;
2562 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2563 + dwarf2_per_objfile->n_type_comp_units); ++i)
2566 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2567 struct quick_file_names *file_data;
2569 per_cu->v.quick->mark = 0;
2570 if (per_cu->v.quick->symtab)
2573 file_data = dw2_get_file_names (objfile, per_cu);
2574 if (file_data == NULL)
2577 for (j = 0; j < file_data->num_file_names; ++j)
2579 if (file_matcher (file_data->file_names[j], data))
2581 per_cu->v.quick->mark = 1;
2587 for (iter = 0; iter < index->symbol_table_slots; ++iter)
2589 offset_type idx = 2 * iter;
2591 offset_type *vec, vec_len, vec_idx;
2593 if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0)
2596 name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]);
2598 if (! (*name_matcher) (name, data))
2601 /* The name was matched, now expand corresponding CUs that were
2603 vec = (offset_type *) (index->constant_pool
2604 + MAYBE_SWAP (index->symbol_table[idx + 1]));
2605 vec_len = MAYBE_SWAP (vec[0]);
2606 for (vec_idx = 0; vec_idx < vec_len; ++vec_idx)
2608 struct dwarf2_per_cu_data *per_cu;
2610 per_cu = dw2_get_cu (MAYBE_SWAP (vec[vec_idx + 1]));
2611 if (per_cu->v.quick->mark)
2612 dw2_instantiate_symtab (objfile, per_cu);
2617 static struct symtab *
2618 dw2_find_pc_sect_symtab (struct objfile *objfile,
2619 struct minimal_symbol *msymbol,
2621 struct obj_section *section,
2624 struct dwarf2_per_cu_data *data;
2626 dw2_setup (objfile);
2628 if (!objfile->psymtabs_addrmap)
2631 data = addrmap_find (objfile->psymtabs_addrmap, pc);
2635 if (warn_if_readin && data->v.quick->symtab)
2636 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
2637 paddress (get_objfile_arch (objfile), pc));
2639 return dw2_instantiate_symtab (objfile, data);
2643 dw2_map_symbol_names (struct objfile *objfile,
2644 void (*fun) (const char *, void *),
2648 struct mapped_index *index;
2650 dw2_setup (objfile);
2652 /* index_table is NULL if OBJF_READNOW. */
2653 if (!dwarf2_per_objfile->index_table)
2655 index = dwarf2_per_objfile->index_table;
2657 for (iter = 0; iter < index->symbol_table_slots; ++iter)
2659 offset_type idx = 2 * iter;
2661 offset_type *vec, vec_len, vec_idx;
2663 if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0)
2666 name = (index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]));
2668 (*fun) (name, data);
2673 dw2_map_symbol_filenames (struct objfile *objfile,
2674 void (*fun) (const char *, const char *, void *),
2679 dw2_setup (objfile);
2681 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2682 + dwarf2_per_objfile->n_type_comp_units); ++i)
2685 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2686 struct quick_file_names *file_data;
2688 if (per_cu->v.quick->symtab)
2691 file_data = dw2_get_file_names (objfile, per_cu);
2692 if (file_data == NULL)
2695 for (j = 0; j < file_data->num_file_names; ++j)
2697 const char *this_real_name = dw2_get_real_path (objfile, file_data,
2699 (*fun) (file_data->file_names[j], this_real_name, data);
2705 dw2_has_symbols (struct objfile *objfile)
2710 const struct quick_symbol_functions dwarf2_gdb_index_functions =
2713 dw2_find_last_source_symtab,
2714 dw2_forget_cached_source_info,
2717 dw2_pre_expand_symtabs_matching,
2721 dw2_expand_symtabs_for_function,
2722 dw2_expand_all_symtabs,
2723 dw2_expand_symtabs_with_filename,
2724 dw2_find_symbol_file,
2725 dw2_map_matching_symbols,
2726 dw2_expand_symtabs_matching,
2727 dw2_find_pc_sect_symtab,
2728 dw2_map_symbol_names,
2729 dw2_map_symbol_filenames
2732 /* Initialize for reading DWARF for this objfile. Return 0 if this
2733 file will use psymtabs, or 1 if using the GNU index. */
2736 dwarf2_initialize_objfile (struct objfile *objfile)
2738 /* If we're about to read full symbols, don't bother with the
2739 indices. In this case we also don't care if some other debug
2740 format is making psymtabs, because they are all about to be
2742 if ((objfile->flags & OBJF_READNOW))
2746 dwarf2_per_objfile->using_index = 1;
2747 create_all_comp_units (objfile);
2748 create_debug_types_hash_table (objfile);
2749 dwarf2_per_objfile->quick_file_names_table =
2750 create_quick_file_names_table (dwarf2_per_objfile->n_comp_units);
2752 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2753 + dwarf2_per_objfile->n_type_comp_units); ++i)
2755 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2757 per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2758 struct dwarf2_per_cu_quick_data);
2761 /* Return 1 so that gdb sees the "quick" functions. However,
2762 these functions will be no-ops because we will have expanded
2767 if (dwarf2_read_index (objfile))
2775 /* Build a partial symbol table. */
2778 dwarf2_build_psymtabs (struct objfile *objfile)
2780 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
2782 init_psymbol_list (objfile, 1024);
2785 dwarf2_build_psymtabs_hard (objfile);
2788 /* Return TRUE if OFFSET is within CU_HEADER. */
2791 offset_in_cu_p (const struct comp_unit_head *cu_header, unsigned int offset)
2793 unsigned int bottom = cu_header->offset;
2794 unsigned int top = (cu_header->offset
2796 + cu_header->initial_length_size);
2798 return (offset >= bottom && offset < top);
2801 /* Read in the comp unit header information from the debug_info at info_ptr.
2802 NOTE: This leaves members offset, first_die_offset to be filled in
2806 read_comp_unit_head (struct comp_unit_head *cu_header,
2807 gdb_byte *info_ptr, bfd *abfd)
2810 unsigned int bytes_read;
2812 cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read);
2813 cu_header->initial_length_size = bytes_read;
2814 cu_header->offset_size = (bytes_read == 4) ? 4 : 8;
2815 info_ptr += bytes_read;
2816 cu_header->version = read_2_bytes (abfd, info_ptr);
2818 cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
2820 info_ptr += bytes_read;
2821 cu_header->addr_size = read_1_byte (abfd, info_ptr);
2823 signed_addr = bfd_get_sign_extend_vma (abfd);
2824 if (signed_addr < 0)
2825 internal_error (__FILE__, __LINE__,
2826 _("read_comp_unit_head: dwarf from non elf file"));
2827 cu_header->signed_addr_p = signed_addr;
2833 partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
2834 gdb_byte *buffer, unsigned int buffer_size,
2837 gdb_byte *beg_of_comp_unit = info_ptr;
2839 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
2841 if (header->version != 2 && header->version != 3 && header->version != 4)
2842 error (_("Dwarf Error: wrong version in compilation unit header "
2843 "(is %d, should be 2, 3, or 4) [in module %s]"), header->version,
2844 bfd_get_filename (abfd));
2846 if (header->abbrev_offset
2847 >= dwarf2_section_size (dwarf2_per_objfile->objfile,
2848 &dwarf2_per_objfile->abbrev))
2849 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
2850 "(offset 0x%lx + 6) [in module %s]"),
2851 (long) header->abbrev_offset,
2852 (long) (beg_of_comp_unit - buffer),
2853 bfd_get_filename (abfd));
2855 if (beg_of_comp_unit + header->length + header->initial_length_size
2856 > buffer + buffer_size)
2857 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
2858 "(offset 0x%lx + 0) [in module %s]"),
2859 (long) header->length,
2860 (long) (beg_of_comp_unit - buffer),
2861 bfd_get_filename (abfd));
2866 /* Read in the types comp unit header information from .debug_types entry at
2867 types_ptr. The result is a pointer to one past the end of the header. */
2870 read_type_comp_unit_head (struct comp_unit_head *cu_header,
2871 ULONGEST *signature,
2872 gdb_byte *types_ptr, bfd *abfd)
2874 gdb_byte *initial_types_ptr = types_ptr;
2876 dwarf2_read_section (dwarf2_per_objfile->objfile,
2877 &dwarf2_per_objfile->types);
2878 cu_header->offset = types_ptr - dwarf2_per_objfile->types.buffer;
2880 types_ptr = read_comp_unit_head (cu_header, types_ptr, abfd);
2882 *signature = read_8_bytes (abfd, types_ptr);
2884 types_ptr += cu_header->offset_size;
2885 cu_header->first_die_offset = types_ptr - initial_types_ptr;
2890 /* Allocate a new partial symtab for file named NAME and mark this new
2891 partial symtab as being an include of PST. */
2894 dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
2895 struct objfile *objfile)
2897 struct partial_symtab *subpst = allocate_psymtab (name, objfile);
2899 subpst->section_offsets = pst->section_offsets;
2900 subpst->textlow = 0;
2901 subpst->texthigh = 0;
2903 subpst->dependencies = (struct partial_symtab **)
2904 obstack_alloc (&objfile->objfile_obstack,
2905 sizeof (struct partial_symtab *));
2906 subpst->dependencies[0] = pst;
2907 subpst->number_of_dependencies = 1;
2909 subpst->globals_offset = 0;
2910 subpst->n_global_syms = 0;
2911 subpst->statics_offset = 0;
2912 subpst->n_static_syms = 0;
2913 subpst->symtab = NULL;
2914 subpst->read_symtab = pst->read_symtab;
2917 /* No private part is necessary for include psymtabs. This property
2918 can be used to differentiate between such include psymtabs and
2919 the regular ones. */
2920 subpst->read_symtab_private = NULL;
2923 /* Read the Line Number Program data and extract the list of files
2924 included by the source file represented by PST. Build an include
2925 partial symtab for each of these included files. */
2928 dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
2929 struct die_info *die,
2930 struct partial_symtab *pst)
2932 struct objfile *objfile = cu->objfile;
2933 bfd *abfd = objfile->obfd;
2934 struct line_header *lh = NULL;
2935 struct attribute *attr;
2937 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
2940 unsigned int line_offset = DW_UNSND (attr);
2942 lh = dwarf_decode_line_header (line_offset, abfd, cu);
2945 return; /* No linetable, so no includes. */
2947 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
2948 dwarf_decode_lines (lh, pst->dirname, abfd, cu, pst);
2950 free_line_header (lh);
2954 hash_type_signature (const void *item)
2956 const struct signatured_type *type_sig = item;
2958 /* This drops the top 32 bits of the signature, but is ok for a hash. */
2959 return type_sig->signature;
2963 eq_type_signature (const void *item_lhs, const void *item_rhs)
2965 const struct signatured_type *lhs = item_lhs;
2966 const struct signatured_type *rhs = item_rhs;
2968 return lhs->signature == rhs->signature;
2971 /* Allocate a hash table for signatured types. */
2974 allocate_signatured_type_table (struct objfile *objfile)
2976 return htab_create_alloc_ex (41,
2977 hash_type_signature,
2980 &objfile->objfile_obstack,
2981 hashtab_obstack_allocate,
2982 dummy_obstack_deallocate);
2985 /* A helper function to add a signatured type CU to a list. */
2988 add_signatured_type_cu_to_list (void **slot, void *datum)
2990 struct signatured_type *sigt = *slot;
2991 struct dwarf2_per_cu_data ***datap = datum;
2993 **datap = &sigt->per_cu;
2999 /* Create the hash table of all entries in the .debug_types section.
3000 The result is zero if there is an error (e.g. missing .debug_types section),
3001 otherwise non-zero. */
3004 create_debug_types_hash_table (struct objfile *objfile)
3008 struct dwarf2_per_cu_data **iter;
3010 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
3011 info_ptr = dwarf2_per_objfile->types.buffer;
3013 if (info_ptr == NULL)
3015 dwarf2_per_objfile->signatured_types = NULL;
3019 types_htab = allocate_signatured_type_table (objfile);
3021 if (dwarf2_die_debug)
3022 fprintf_unfiltered (gdb_stdlog, "Signatured types:\n");
3024 while (info_ptr < dwarf2_per_objfile->types.buffer
3025 + dwarf2_per_objfile->types.size)
3027 unsigned int offset;
3028 unsigned int offset_size;
3029 unsigned int type_offset;
3030 unsigned int length, initial_length_size;
3031 unsigned short version;
3033 struct signatured_type *type_sig;
3035 gdb_byte *ptr = info_ptr;
3037 offset = ptr - dwarf2_per_objfile->types.buffer;
3039 /* We need to read the type's signature in order to build the hash
3040 table, but we don't need to read anything else just yet. */
3042 /* Sanity check to ensure entire cu is present. */
3043 length = read_initial_length (objfile->obfd, ptr, &initial_length_size);
3044 if (ptr + length + initial_length_size
3045 > dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
3047 complaint (&symfile_complaints,
3048 _("debug type entry runs off end "
3049 "of `.debug_types' section, ignored"));
3053 offset_size = initial_length_size == 4 ? 4 : 8;
3054 ptr += initial_length_size;
3055 version = bfd_get_16 (objfile->obfd, ptr);
3057 ptr += offset_size; /* abbrev offset */
3058 ptr += 1; /* address size */
3059 signature = bfd_get_64 (objfile->obfd, ptr);
3061 type_offset = read_offset_1 (objfile->obfd, ptr, offset_size);
3063 type_sig = obstack_alloc (&objfile->objfile_obstack, sizeof (*type_sig));
3064 memset (type_sig, 0, sizeof (*type_sig));
3065 type_sig->signature = signature;
3066 type_sig->offset = offset;
3067 type_sig->type_offset = type_offset;
3068 type_sig->per_cu.objfile = objfile;
3069 type_sig->per_cu.from_debug_types = 1;
3071 slot = htab_find_slot (types_htab, type_sig, INSERT);
3072 gdb_assert (slot != NULL);
3075 if (dwarf2_die_debug)
3076 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n",
3077 offset, phex (signature, sizeof (signature)));
3079 info_ptr = info_ptr + initial_length_size + length;
3082 dwarf2_per_objfile->signatured_types = types_htab;
3084 dwarf2_per_objfile->n_type_comp_units = htab_elements (types_htab);
3085 dwarf2_per_objfile->type_comp_units
3086 = obstack_alloc (&objfile->objfile_obstack,
3087 dwarf2_per_objfile->n_type_comp_units
3088 * sizeof (struct dwarf2_per_cu_data *));
3089 iter = &dwarf2_per_objfile->type_comp_units[0];
3090 htab_traverse_noresize (types_htab, add_signatured_type_cu_to_list, &iter);
3091 gdb_assert (iter - &dwarf2_per_objfile->type_comp_units[0]
3092 == dwarf2_per_objfile->n_type_comp_units);
3097 /* Lookup a signature based type.
3098 Returns NULL if SIG is not present in the table. */
3100 static struct signatured_type *
3101 lookup_signatured_type (struct objfile *objfile, ULONGEST sig)
3103 struct signatured_type find_entry, *entry;
3105 if (dwarf2_per_objfile->signatured_types == NULL)
3107 complaint (&symfile_complaints,
3108 _("missing `.debug_types' section for DW_FORM_sig8 die"));
3112 find_entry.signature = sig;
3113 entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
3117 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
3120 init_cu_die_reader (struct die_reader_specs *reader,
3121 struct dwarf2_cu *cu)
3123 reader->abfd = cu->objfile->obfd;
3125 if (cu->per_cu->from_debug_types)
3127 gdb_assert (dwarf2_per_objfile->types.readin);
3128 reader->buffer = dwarf2_per_objfile->types.buffer;
3132 gdb_assert (dwarf2_per_objfile->info.readin);
3133 reader->buffer = dwarf2_per_objfile->info.buffer;
3137 /* Find the base address of the compilation unit for range lists and
3138 location lists. It will normally be specified by DW_AT_low_pc.
3139 In DWARF-3 draft 4, the base address could be overridden by
3140 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3141 compilation units with discontinuous ranges. */
3144 dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu)
3146 struct attribute *attr;
3149 cu->base_address = 0;
3151 attr = dwarf2_attr (die, DW_AT_entry_pc, cu);
3154 cu->base_address = DW_ADDR (attr);
3159 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
3162 cu->base_address = DW_ADDR (attr);
3168 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
3169 to combine the common parts.
3170 Process a compilation unit for a psymtab.
3171 BUFFER is a pointer to the beginning of the dwarf section buffer,
3172 either .debug_info or debug_types.
3173 INFO_PTR is a pointer to the start of the CU.
3174 Returns a pointer to the next CU. */
3177 process_psymtab_comp_unit (struct objfile *objfile,
3178 struct dwarf2_per_cu_data *this_cu,
3179 gdb_byte *buffer, gdb_byte *info_ptr,
3180 unsigned int buffer_size)
3182 bfd *abfd = objfile->obfd;
3183 gdb_byte *beg_of_comp_unit = info_ptr;
3184 struct die_info *comp_unit_die;
3185 struct partial_symtab *pst;
3187 struct cleanup *back_to_inner;
3188 struct dwarf2_cu cu;
3189 int has_children, has_pc_info;
3190 struct attribute *attr;
3191 CORE_ADDR best_lowpc = 0, best_highpc = 0;
3192 struct die_reader_specs reader_specs;
3193 const char *filename;
3195 init_one_comp_unit (&cu, objfile);
3196 back_to_inner = make_cleanup (free_stack_comp_unit, &cu);
3198 info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
3199 buffer, buffer_size,
3202 /* Complete the cu_header. */
3203 cu.header.offset = beg_of_comp_unit - buffer;
3204 cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
3206 cu.list_in_scope = &file_symbols;
3208 /* If this compilation unit was already read in, free the
3209 cached copy in order to read it in again. This is
3210 necessary because we skipped some symbols when we first
3211 read in the compilation unit (see load_partial_dies).
3212 This problem could be avoided, but the benefit is
3214 if (this_cu->cu != NULL)
3215 free_one_cached_comp_unit (this_cu->cu);
3217 /* Note that this is a pointer to our stack frame, being
3218 added to a global data structure. It will be cleaned up
3219 in free_stack_comp_unit when we finish with this
3220 compilation unit. */
3222 cu.per_cu = this_cu;
3224 /* Read the abbrevs for this compilation unit into a table. */
3225 dwarf2_read_abbrevs (abfd, &cu);
3226 make_cleanup (dwarf2_free_abbrev_table, &cu);
3228 /* Read the compilation unit die. */
3229 if (this_cu->from_debug_types)
3230 info_ptr += 8 /*signature*/ + cu.header.offset_size;
3231 init_cu_die_reader (&reader_specs, &cu);
3232 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
3235 if (this_cu->from_debug_types)
3237 /* offset,length haven't been set yet for type units. */
3238 this_cu->offset = cu.header.offset;
3239 this_cu->length = cu.header.length + cu.header.initial_length_size;
3241 else if (comp_unit_die->tag == DW_TAG_partial_unit)
3243 info_ptr = (beg_of_comp_unit + cu.header.length
3244 + cu.header.initial_length_size);
3245 do_cleanups (back_to_inner);
3249 prepare_one_comp_unit (&cu, comp_unit_die);
3251 /* Allocate a new partial symbol table structure. */
3252 attr = dwarf2_attr (comp_unit_die, DW_AT_name, &cu);
3253 if (attr == NULL || !DW_STRING (attr))
3256 filename = DW_STRING (attr);
3257 pst = start_psymtab_common (objfile, objfile->section_offsets,
3259 /* TEXTLOW and TEXTHIGH are set below. */
3261 objfile->global_psymbols.next,
3262 objfile->static_psymbols.next);
3264 attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, &cu);
3266 pst->dirname = DW_STRING (attr);
3268 pst->read_symtab_private = this_cu;
3270 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3272 /* Store the function that reads in the rest of the symbol table. */
3273 pst->read_symtab = dwarf2_psymtab_to_symtab;
3275 this_cu->v.psymtab = pst;
3277 dwarf2_find_base_address (comp_unit_die, &cu);
3279 /* Possibly set the default values of LOWPC and HIGHPC from
3281 has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc,
3282 &best_highpc, &cu, pst);
3283 if (has_pc_info == 1 && best_lowpc < best_highpc)
3284 /* Store the contiguous range if it is not empty; it can be empty for
3285 CUs with no code. */
3286 addrmap_set_empty (objfile->psymtabs_addrmap,
3287 best_lowpc + baseaddr,
3288 best_highpc + baseaddr - 1, pst);
3290 /* Check if comp unit has_children.
3291 If so, read the rest of the partial symbols from this comp unit.
3292 If not, there's no more debug_info for this comp unit. */
3295 struct partial_die_info *first_die;
3296 CORE_ADDR lowpc, highpc;
3298 lowpc = ((CORE_ADDR) -1);
3299 highpc = ((CORE_ADDR) 0);
3301 first_die = load_partial_dies (abfd, buffer, info_ptr, 1, &cu);
3303 scan_partial_symbols (first_die, &lowpc, &highpc,
3304 ! has_pc_info, &cu);
3306 /* If we didn't find a lowpc, set it to highpc to avoid
3307 complaints from `maint check'. */
3308 if (lowpc == ((CORE_ADDR) -1))
3311 /* If the compilation unit didn't have an explicit address range,
3312 then use the information extracted from its child dies. */
3316 best_highpc = highpc;
3319 pst->textlow = best_lowpc + baseaddr;
3320 pst->texthigh = best_highpc + baseaddr;
3322 pst->n_global_syms = objfile->global_psymbols.next -
3323 (objfile->global_psymbols.list + pst->globals_offset);
3324 pst->n_static_syms = objfile->static_psymbols.next -
3325 (objfile->static_psymbols.list + pst->statics_offset);
3326 sort_pst_symbols (pst);
3328 info_ptr = (beg_of_comp_unit + cu.header.length
3329 + cu.header.initial_length_size);
3331 if (this_cu->from_debug_types)
3333 /* It's not clear we want to do anything with stmt lists here.
3334 Waiting to see what gcc ultimately does. */
3338 /* Get the list of files included in the current compilation unit,
3339 and build a psymtab for each of them. */
3340 dwarf2_build_include_psymtabs (&cu, comp_unit_die, pst);
3343 do_cleanups (back_to_inner);
3348 /* Traversal function for htab_traverse_noresize.
3349 Process one .debug_types comp-unit. */
3352 process_type_comp_unit (void **slot, void *info)
3354 struct signatured_type *entry = (struct signatured_type *) *slot;
3355 struct objfile *objfile = (struct objfile *) info;
3356 struct dwarf2_per_cu_data *this_cu;
3358 this_cu = &entry->per_cu;
3360 gdb_assert (dwarf2_per_objfile->types.readin);
3361 process_psymtab_comp_unit (objfile, this_cu,
3362 dwarf2_per_objfile->types.buffer,
3363 dwarf2_per_objfile->types.buffer + entry->offset,
3364 dwarf2_per_objfile->types.size);
3369 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
3370 Build partial symbol tables for the .debug_types comp-units. */
3373 build_type_psymtabs (struct objfile *objfile)
3375 if (! create_debug_types_hash_table (objfile))
3378 htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
3379 process_type_comp_unit, objfile);
3382 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
3385 psymtabs_addrmap_cleanup (void *o)
3387 struct objfile *objfile = o;
3389 objfile->psymtabs_addrmap = NULL;
3392 /* Build the partial symbol table by doing a quick pass through the
3393 .debug_info and .debug_abbrev sections. */
3396 dwarf2_build_psymtabs_hard (struct objfile *objfile)
3399 struct cleanup *back_to, *addrmap_cleanup;
3400 struct obstack temp_obstack;
3402 dwarf2_per_objfile->reading_partial_symbols = 1;
3404 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
3405 info_ptr = dwarf2_per_objfile->info.buffer;
3407 /* Any cached compilation units will be linked by the per-objfile
3408 read_in_chain. Make sure to free them when we're done. */
3409 back_to = make_cleanup (free_cached_comp_units, NULL);
3411 build_type_psymtabs (objfile);
3413 create_all_comp_units (objfile);
3415 /* Create a temporary address map on a temporary obstack. We later
3416 copy this to the final obstack. */
3417 obstack_init (&temp_obstack);
3418 make_cleanup_obstack_free (&temp_obstack);
3419 objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack);
3420 addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile);
3422 /* Since the objects we're extracting from .debug_info vary in
3423 length, only the individual functions to extract them (like
3424 read_comp_unit_head and load_partial_die) can really know whether
3425 the buffer is large enough to hold another complete object.
3427 At the moment, they don't actually check that. If .debug_info
3428 holds just one extra byte after the last compilation unit's dies,
3429 then read_comp_unit_head will happily read off the end of the
3430 buffer. read_partial_die is similarly casual. Those functions
3433 For this loop condition, simply checking whether there's any data
3434 left at all should be sufficient. */
3436 while (info_ptr < (dwarf2_per_objfile->info.buffer
3437 + dwarf2_per_objfile->info.size))
3439 struct dwarf2_per_cu_data *this_cu;
3441 this_cu = dwarf2_find_comp_unit (info_ptr
3442 - dwarf2_per_objfile->info.buffer,
3445 info_ptr = process_psymtab_comp_unit (objfile, this_cu,
3446 dwarf2_per_objfile->info.buffer,
3448 dwarf2_per_objfile->info.size);
3451 objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
3452 &objfile->objfile_obstack);
3453 discard_cleanups (addrmap_cleanup);
3455 do_cleanups (back_to);
3458 /* Load the partial DIEs for a secondary CU into memory. */
3461 load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu,
3462 struct objfile *objfile)
3464 bfd *abfd = objfile->obfd;
3465 gdb_byte *info_ptr, *beg_of_comp_unit;
3466 struct die_info *comp_unit_die;
3467 struct dwarf2_cu *cu;
3468 struct cleanup *free_abbrevs_cleanup, *free_cu_cleanup = NULL;
3470 struct die_reader_specs reader_specs;
3473 gdb_assert (! this_cu->from_debug_types);
3475 gdb_assert (dwarf2_per_objfile->info.readin);
3476 info_ptr = dwarf2_per_objfile->info.buffer + this_cu->offset;
3477 beg_of_comp_unit = info_ptr;
3479 if (this_cu->cu == NULL)
3481 cu = xmalloc (sizeof (*cu));
3482 init_one_comp_unit (cu, objfile);
3486 /* If an error occurs while loading, release our storage. */
3487 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
3489 info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr,
3490 dwarf2_per_objfile->info.buffer,
3491 dwarf2_per_objfile->info.size,
3494 /* Complete the cu_header. */
3495 cu->header.offset = this_cu->offset;
3496 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
3498 /* Link this compilation unit into the compilation unit tree. */
3500 cu->per_cu = this_cu;
3502 /* Link this CU into read_in_chain. */
3503 this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
3504 dwarf2_per_objfile->read_in_chain = this_cu;
3509 info_ptr += cu->header.first_die_offset;
3512 /* Read the abbrevs for this compilation unit into a table. */
3513 gdb_assert (cu->dwarf2_abbrevs == NULL);
3514 dwarf2_read_abbrevs (abfd, cu);
3515 free_abbrevs_cleanup = make_cleanup (dwarf2_free_abbrev_table, cu);
3517 /* Read the compilation unit die. */
3518 init_cu_die_reader (&reader_specs, cu);
3519 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
3522 prepare_one_comp_unit (cu, comp_unit_die);
3524 /* Check if comp unit has_children.
3525 If so, read the rest of the partial symbols from this comp unit.
3526 If not, there's no more debug_info for this comp unit. */
3528 load_partial_dies (abfd, dwarf2_per_objfile->info.buffer, info_ptr, 0, cu);
3530 do_cleanups (free_abbrevs_cleanup);
3534 /* We've successfully allocated this compilation unit. Let our
3535 caller clean it up when finished with it. */
3536 discard_cleanups (free_cu_cleanup);
3540 /* Create a list of all compilation units in OBJFILE. We do this only
3541 if an inter-comp-unit reference is found; presumably if there is one,
3542 there will be many, and one will occur early in the .debug_info section.
3543 So there's no point in building this list incrementally. */
3546 create_all_comp_units (struct objfile *objfile)
3550 struct dwarf2_per_cu_data **all_comp_units;
3553 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
3554 info_ptr = dwarf2_per_objfile->info.buffer;
3558 all_comp_units = xmalloc (n_allocated
3559 * sizeof (struct dwarf2_per_cu_data *));
3561 while (info_ptr < dwarf2_per_objfile->info.buffer
3562 + dwarf2_per_objfile->info.size)
3564 unsigned int length, initial_length_size;
3565 struct dwarf2_per_cu_data *this_cu;
3566 unsigned int offset;
3568 offset = info_ptr - dwarf2_per_objfile->info.buffer;
3570 /* Read just enough information to find out where the next
3571 compilation unit is. */
3572 length = read_initial_length (objfile->obfd, info_ptr,
3573 &initial_length_size);
3575 /* Save the compilation unit for later lookup. */
3576 this_cu = obstack_alloc (&objfile->objfile_obstack,
3577 sizeof (struct dwarf2_per_cu_data));
3578 memset (this_cu, 0, sizeof (*this_cu));
3579 this_cu->offset = offset;
3580 this_cu->length = length + initial_length_size;
3581 this_cu->objfile = objfile;
3583 if (n_comp_units == n_allocated)
3586 all_comp_units = xrealloc (all_comp_units,
3588 * sizeof (struct dwarf2_per_cu_data *));
3590 all_comp_units[n_comp_units++] = this_cu;
3592 info_ptr = info_ptr + this_cu->length;
3595 dwarf2_per_objfile->all_comp_units
3596 = obstack_alloc (&objfile->objfile_obstack,
3597 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
3598 memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
3599 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
3600 xfree (all_comp_units);
3601 dwarf2_per_objfile->n_comp_units = n_comp_units;
3604 /* Process all loaded DIEs for compilation unit CU, starting at
3605 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
3606 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
3607 DW_AT_ranges). If NEED_PC is set, then this function will set
3608 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
3609 and record the covered ranges in the addrmap. */
3612 scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
3613 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
3615 struct partial_die_info *pdi;
3617 /* Now, march along the PDI's, descending into ones which have
3618 interesting children but skipping the children of the other ones,
3619 until we reach the end of the compilation unit. */
3625 fixup_partial_die (pdi, cu);
3627 /* Anonymous namespaces or modules have no name but have interesting
3628 children, so we need to look at them. Ditto for anonymous
3631 if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
3632 || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type)
3636 case DW_TAG_subprogram:
3637 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
3639 case DW_TAG_constant:
3640 case DW_TAG_variable:
3641 case DW_TAG_typedef:
3642 case DW_TAG_union_type:
3643 if (!pdi->is_declaration)
3645 add_partial_symbol (pdi, cu);
3648 case DW_TAG_class_type:
3649 case DW_TAG_interface_type:
3650 case DW_TAG_structure_type:
3651 if (!pdi->is_declaration)
3653 add_partial_symbol (pdi, cu);
3656 case DW_TAG_enumeration_type:
3657 if (!pdi->is_declaration)
3658 add_partial_enumeration (pdi, cu);
3660 case DW_TAG_base_type:
3661 case DW_TAG_subrange_type:
3662 /* File scope base type definitions are added to the partial
3664 add_partial_symbol (pdi, cu);
3666 case DW_TAG_namespace:
3667 add_partial_namespace (pdi, lowpc, highpc, need_pc, cu);
3670 add_partial_module (pdi, lowpc, highpc, need_pc, cu);
3677 /* If the die has a sibling, skip to the sibling. */
3679 pdi = pdi->die_sibling;
3683 /* Functions used to compute the fully scoped name of a partial DIE.
3685 Normally, this is simple. For C++, the parent DIE's fully scoped
3686 name is concatenated with "::" and the partial DIE's name. For
3687 Java, the same thing occurs except that "." is used instead of "::".
3688 Enumerators are an exception; they use the scope of their parent
3689 enumeration type, i.e. the name of the enumeration type is not
3690 prepended to the enumerator.
3692 There are two complexities. One is DW_AT_specification; in this
3693 case "parent" means the parent of the target of the specification,
3694 instead of the direct parent of the DIE. The other is compilers
3695 which do not emit DW_TAG_namespace; in this case we try to guess
3696 the fully qualified name of structure types from their members'
3697 linkage names. This must be done using the DIE's children rather
3698 than the children of any DW_AT_specification target. We only need
3699 to do this for structures at the top level, i.e. if the target of
3700 any DW_AT_specification (if any; otherwise the DIE itself) does not
3703 /* Compute the scope prefix associated with PDI's parent, in
3704 compilation unit CU. The result will be allocated on CU's
3705 comp_unit_obstack, or a copy of the already allocated PDI->NAME
3706 field. NULL is returned if no prefix is necessary. */
3708 partial_die_parent_scope (struct partial_die_info *pdi,
3709 struct dwarf2_cu *cu)
3711 char *grandparent_scope;
3712 struct partial_die_info *parent, *real_pdi;
3714 /* We need to look at our parent DIE; if we have a DW_AT_specification,
3715 then this means the parent of the specification DIE. */
3718 while (real_pdi->has_specification)
3719 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
3721 parent = real_pdi->die_parent;
3725 if (parent->scope_set)
3726 return parent->scope;
3728 fixup_partial_die (parent, cu);
3730 grandparent_scope = partial_die_parent_scope (parent, cu);
3732 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
3733 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
3734 Work around this problem here. */
3735 if (cu->language == language_cplus
3736 && parent->tag == DW_TAG_namespace
3737 && strcmp (parent->name, "::") == 0
3738 && grandparent_scope == NULL)
3740 parent->scope = NULL;
3741 parent->scope_set = 1;
3745 if (parent->tag == DW_TAG_namespace
3746 || parent->tag == DW_TAG_module
3747 || parent->tag == DW_TAG_structure_type
3748 || parent->tag == DW_TAG_class_type
3749 || parent->tag == DW_TAG_interface_type
3750 || parent->tag == DW_TAG_union_type
3751 || parent->tag == DW_TAG_enumeration_type)
3753 if (grandparent_scope == NULL)
3754 parent->scope = parent->name;
3756 parent->scope = typename_concat (&cu->comp_unit_obstack,
3758 parent->name, 0, cu);
3760 else if (parent->tag == DW_TAG_enumerator)
3761 /* Enumerators should not get the name of the enumeration as a prefix. */
3762 parent->scope = grandparent_scope;
3765 /* FIXME drow/2004-04-01: What should we be doing with
3766 function-local names? For partial symbols, we should probably be
3768 complaint (&symfile_complaints,
3769 _("unhandled containing DIE tag %d for DIE at %d"),
3770 parent->tag, pdi->offset);
3771 parent->scope = grandparent_scope;
3774 parent->scope_set = 1;
3775 return parent->scope;
3778 /* Return the fully scoped name associated with PDI, from compilation unit
3779 CU. The result will be allocated with malloc. */
3781 partial_die_full_name (struct partial_die_info *pdi,
3782 struct dwarf2_cu *cu)
3786 /* If this is a template instantiation, we can not work out the
3787 template arguments from partial DIEs. So, unfortunately, we have
3788 to go through the full DIEs. At least any work we do building
3789 types here will be reused if full symbols are loaded later. */
3790 if (pdi->has_template_arguments)
3792 fixup_partial_die (pdi, cu);
3794 if (pdi->name != NULL && strchr (pdi->name, '<') == NULL)
3796 struct die_info *die;
3797 struct attribute attr;
3798 struct dwarf2_cu *ref_cu = cu;
3801 attr.form = DW_FORM_ref_addr;
3802 attr.u.addr = pdi->offset;
3803 die = follow_die_ref (NULL, &attr, &ref_cu);
3805 return xstrdup (dwarf2_full_name (NULL, die, ref_cu));
3809 parent_scope = partial_die_parent_scope (pdi, cu);
3810 if (parent_scope == NULL)
3813 return typename_concat (NULL, parent_scope, pdi->name, 0, cu);
3817 add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
3819 struct objfile *objfile = cu->objfile;
3821 char *actual_name = NULL;
3822 const struct partial_symbol *psym = NULL;
3824 int built_actual_name = 0;
3826 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3828 actual_name = partial_die_full_name (pdi, cu);
3830 built_actual_name = 1;
3832 if (actual_name == NULL)
3833 actual_name = pdi->name;
3837 case DW_TAG_subprogram:
3838 if (pdi->is_external || cu->language == language_ada)
3840 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
3841 of the global scope. But in Ada, we want to be able to access
3842 nested procedures globally. So all Ada subprograms are stored
3843 in the global scope. */
3844 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3845 mst_text, objfile); */
3846 add_psymbol_to_list (actual_name, strlen (actual_name),
3848 VAR_DOMAIN, LOC_BLOCK,
3849 &objfile->global_psymbols,
3850 0, pdi->lowpc + baseaddr,
3851 cu->language, objfile);
3855 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3856 mst_file_text, objfile); */
3857 add_psymbol_to_list (actual_name, strlen (actual_name),
3859 VAR_DOMAIN, LOC_BLOCK,
3860 &objfile->static_psymbols,
3861 0, pdi->lowpc + baseaddr,
3862 cu->language, objfile);
3865 case DW_TAG_constant:
3867 struct psymbol_allocation_list *list;
3869 if (pdi->is_external)
3870 list = &objfile->global_psymbols;
3872 list = &objfile->static_psymbols;
3873 add_psymbol_to_list (actual_name, strlen (actual_name),
3874 built_actual_name, VAR_DOMAIN, LOC_STATIC,
3875 list, 0, 0, cu->language, objfile);
3878 case DW_TAG_variable:
3880 addr = decode_locdesc (pdi->locdesc, cu);
3884 && !dwarf2_per_objfile->has_section_at_zero)
3886 /* A global or static variable may also have been stripped
3887 out by the linker if unused, in which case its address
3888 will be nullified; do not add such variables into partial
3889 symbol table then. */
3891 else if (pdi->is_external)
3894 Don't enter into the minimal symbol tables as there is
3895 a minimal symbol table entry from the ELF symbols already.
3896 Enter into partial symbol table if it has a location
3897 descriptor or a type.
3898 If the location descriptor is missing, new_symbol will create
3899 a LOC_UNRESOLVED symbol, the address of the variable will then
3900 be determined from the minimal symbol table whenever the variable
3902 The address for the partial symbol table entry is not
3903 used by GDB, but it comes in handy for debugging partial symbol
3906 if (pdi->locdesc || pdi->has_type)
3907 add_psymbol_to_list (actual_name, strlen (actual_name),
3909 VAR_DOMAIN, LOC_STATIC,
3910 &objfile->global_psymbols,
3912 cu->language, objfile);
3916 /* Static Variable. Skip symbols without location descriptors. */
3917 if (pdi->locdesc == NULL)
3919 if (built_actual_name)
3920 xfree (actual_name);
3923 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
3924 mst_file_data, objfile); */
3925 add_psymbol_to_list (actual_name, strlen (actual_name),
3927 VAR_DOMAIN, LOC_STATIC,
3928 &objfile->static_psymbols,
3930 cu->language, objfile);
3933 case DW_TAG_typedef:
3934 case DW_TAG_base_type:
3935 case DW_TAG_subrange_type:
3936 add_psymbol_to_list (actual_name, strlen (actual_name),
3938 VAR_DOMAIN, LOC_TYPEDEF,
3939 &objfile->static_psymbols,
3940 0, (CORE_ADDR) 0, cu->language, objfile);
3942 case DW_TAG_namespace:
3943 add_psymbol_to_list (actual_name, strlen (actual_name),
3945 VAR_DOMAIN, LOC_TYPEDEF,
3946 &objfile->global_psymbols,
3947 0, (CORE_ADDR) 0, cu->language, objfile);
3949 case DW_TAG_class_type:
3950 case DW_TAG_interface_type:
3951 case DW_TAG_structure_type:
3952 case DW_TAG_union_type:
3953 case DW_TAG_enumeration_type:
3954 /* Skip external references. The DWARF standard says in the section
3955 about "Structure, Union, and Class Type Entries": "An incomplete
3956 structure, union or class type is represented by a structure,
3957 union or class entry that does not have a byte size attribute
3958 and that has a DW_AT_declaration attribute." */
3959 if (!pdi->has_byte_size && pdi->is_declaration)
3961 if (built_actual_name)
3962 xfree (actual_name);
3966 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
3967 static vs. global. */
3968 add_psymbol_to_list (actual_name, strlen (actual_name),
3970 STRUCT_DOMAIN, LOC_TYPEDEF,
3971 (cu->language == language_cplus
3972 || cu->language == language_java)
3973 ? &objfile->global_psymbols
3974 : &objfile->static_psymbols,
3975 0, (CORE_ADDR) 0, cu->language, objfile);
3978 case DW_TAG_enumerator:
3979 add_psymbol_to_list (actual_name, strlen (actual_name),
3981 VAR_DOMAIN, LOC_CONST,
3982 (cu->language == language_cplus
3983 || cu->language == language_java)
3984 ? &objfile->global_psymbols
3985 : &objfile->static_psymbols,
3986 0, (CORE_ADDR) 0, cu->language, objfile);
3992 if (built_actual_name)
3993 xfree (actual_name);
3996 /* Read a partial die corresponding to a namespace; also, add a symbol
3997 corresponding to that namespace to the symbol table. NAMESPACE is
3998 the name of the enclosing namespace. */
4001 add_partial_namespace (struct partial_die_info *pdi,
4002 CORE_ADDR *lowpc, CORE_ADDR *highpc,
4003 int need_pc, struct dwarf2_cu *cu)
4005 /* Add a symbol for the namespace. */
4007 add_partial_symbol (pdi, cu);
4009 /* Now scan partial symbols in that namespace. */
4011 if (pdi->has_children)
4012 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
4015 /* Read a partial die corresponding to a Fortran module. */
4018 add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
4019 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
4021 /* Now scan partial symbols in that module. */
4023 if (pdi->has_children)
4024 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
4027 /* Read a partial die corresponding to a subprogram and create a partial
4028 symbol for that subprogram. When the CU language allows it, this
4029 routine also defines a partial symbol for each nested subprogram
4030 that this subprogram contains.
4032 DIE my also be a lexical block, in which case we simply search
4033 recursively for suprograms defined inside that lexical block.
4034 Again, this is only performed when the CU language allows this
4035 type of definitions. */
4038 add_partial_subprogram (struct partial_die_info *pdi,
4039 CORE_ADDR *lowpc, CORE_ADDR *highpc,
4040 int need_pc, struct dwarf2_cu *cu)
4042 if (pdi->tag == DW_TAG_subprogram)
4044 if (pdi->has_pc_info)
4046 if (pdi->lowpc < *lowpc)
4047 *lowpc = pdi->lowpc;
4048 if (pdi->highpc > *highpc)
4049 *highpc = pdi->highpc;
4053 struct objfile *objfile = cu->objfile;
4055 baseaddr = ANOFFSET (objfile->section_offsets,
4056 SECT_OFF_TEXT (objfile));
4057 addrmap_set_empty (objfile->psymtabs_addrmap,
4058 pdi->lowpc + baseaddr,
4059 pdi->highpc - 1 + baseaddr,
4060 cu->per_cu->v.psymtab);
4062 if (!pdi->is_declaration)
4063 /* Ignore subprogram DIEs that do not have a name, they are
4064 illegal. Do not emit a complaint at this point, we will
4065 do so when we convert this psymtab into a symtab. */
4067 add_partial_symbol (pdi, cu);
4071 if (! pdi->has_children)
4074 if (cu->language == language_ada)
4076 pdi = pdi->die_child;
4079 fixup_partial_die (pdi, cu);
4080 if (pdi->tag == DW_TAG_subprogram
4081 || pdi->tag == DW_TAG_lexical_block)
4082 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
4083 pdi = pdi->die_sibling;
4088 /* Read a partial die corresponding to an enumeration type. */
4091 add_partial_enumeration (struct partial_die_info *enum_pdi,
4092 struct dwarf2_cu *cu)
4094 struct partial_die_info *pdi;
4096 if (enum_pdi->name != NULL)
4097 add_partial_symbol (enum_pdi, cu);
4099 pdi = enum_pdi->die_child;
4102 if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
4103 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
4105 add_partial_symbol (pdi, cu);
4106 pdi = pdi->die_sibling;
4110 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
4111 Return the corresponding abbrev, or NULL if the number is zero (indicating
4112 an empty DIE). In either case *BYTES_READ will be set to the length of
4113 the initial number. */
4115 static struct abbrev_info *
4116 peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
4117 struct dwarf2_cu *cu)
4119 bfd *abfd = cu->objfile->obfd;
4120 unsigned int abbrev_number;
4121 struct abbrev_info *abbrev;
4123 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
4125 if (abbrev_number == 0)
4128 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
4131 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
4132 abbrev_number, bfd_get_filename (abfd));
4138 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4139 Returns a pointer to the end of a series of DIEs, terminated by an empty
4140 DIE. Any children of the skipped DIEs will also be skipped. */
4143 skip_children (gdb_byte *buffer, gdb_byte *info_ptr, struct dwarf2_cu *cu)
4145 struct abbrev_info *abbrev;
4146 unsigned int bytes_read;
4150 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
4152 return info_ptr + bytes_read;
4154 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
4158 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4159 INFO_PTR should point just after the initial uleb128 of a DIE, and the
4160 abbrev corresponding to that skipped uleb128 should be passed in
4161 ABBREV. Returns a pointer to this DIE's sibling, skipping any
4165 skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
4166 struct abbrev_info *abbrev, struct dwarf2_cu *cu)
4168 unsigned int bytes_read;
4169 struct attribute attr;
4170 bfd *abfd = cu->objfile->obfd;
4171 unsigned int form, i;
4173 for (i = 0; i < abbrev->num_attrs; i++)
4175 /* The only abbrev we care about is DW_AT_sibling. */
4176 if (abbrev->attrs[i].name == DW_AT_sibling)
4178 read_attribute (&attr, &abbrev->attrs[i],
4179 abfd, info_ptr, cu);
4180 if (attr.form == DW_FORM_ref_addr)
4181 complaint (&symfile_complaints,
4182 _("ignoring absolute DW_AT_sibling"));
4184 return buffer + dwarf2_get_ref_die_offset (&attr);
4187 /* If it isn't DW_AT_sibling, skip this attribute. */
4188 form = abbrev->attrs[i].form;
4192 case DW_FORM_ref_addr:
4193 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
4194 and later it is offset sized. */
4195 if (cu->header.version == 2)
4196 info_ptr += cu->header.addr_size;
4198 info_ptr += cu->header.offset_size;
4201 info_ptr += cu->header.addr_size;
4208 case DW_FORM_flag_present:
4223 case DW_FORM_string:
4224 read_direct_string (abfd, info_ptr, &bytes_read);
4225 info_ptr += bytes_read;
4227 case DW_FORM_sec_offset:
4229 info_ptr += cu->header.offset_size;
4231 case DW_FORM_exprloc:
4233 info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
4234 info_ptr += bytes_read;
4236 case DW_FORM_block1:
4237 info_ptr += 1 + read_1_byte (abfd, info_ptr);
4239 case DW_FORM_block2:
4240 info_ptr += 2 + read_2_bytes (abfd, info_ptr);
4242 case DW_FORM_block4:
4243 info_ptr += 4 + read_4_bytes (abfd, info_ptr);
4247 case DW_FORM_ref_udata:
4248 info_ptr = skip_leb128 (abfd, info_ptr);
4250 case DW_FORM_indirect:
4251 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
4252 info_ptr += bytes_read;
4253 /* We need to continue parsing from here, so just go back to
4255 goto skip_attribute;
4258 error (_("Dwarf Error: Cannot handle %s "
4259 "in DWARF reader [in module %s]"),
4260 dwarf_form_name (form),
4261 bfd_get_filename (abfd));
4265 if (abbrev->has_children)
4266 return skip_children (buffer, info_ptr, cu);
4271 /* Locate ORIG_PDI's sibling.
4272 INFO_PTR should point to the start of the next DIE after ORIG_PDI
4276 locate_pdi_sibling (struct partial_die_info *orig_pdi,
4277 gdb_byte *buffer, gdb_byte *info_ptr,
4278 bfd *abfd, struct dwarf2_cu *cu)
4280 /* Do we know the sibling already? */
4282 if (orig_pdi->sibling)
4283 return orig_pdi->sibling;
4285 /* Are there any children to deal with? */
4287 if (!orig_pdi->has_children)
4290 /* Skip the children the long way. */
4292 return skip_children (buffer, info_ptr, cu);
4295 /* Expand this partial symbol table into a full symbol table. */
4298 dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
4304 warning (_("bug: psymtab for %s is already read in."),
4311 printf_filtered (_("Reading in symbols for %s..."),
4313 gdb_flush (gdb_stdout);
4316 /* Restore our global data. */
4317 dwarf2_per_objfile = objfile_data (pst->objfile,
4318 dwarf2_objfile_data_key);
4320 /* If this psymtab is constructed from a debug-only objfile, the
4321 has_section_at_zero flag will not necessarily be correct. We
4322 can get the correct value for this flag by looking at the data
4323 associated with the (presumably stripped) associated objfile. */
4324 if (pst->objfile->separate_debug_objfile_backlink)
4326 struct dwarf2_per_objfile *dpo_backlink
4327 = objfile_data (pst->objfile->separate_debug_objfile_backlink,
4328 dwarf2_objfile_data_key);
4330 dwarf2_per_objfile->has_section_at_zero
4331 = dpo_backlink->has_section_at_zero;
4334 dwarf2_per_objfile->reading_partial_symbols = 0;
4336 psymtab_to_symtab_1 (pst);
4338 /* Finish up the debug error message. */
4340 printf_filtered (_("done.\n"));
4345 /* Add PER_CU to the queue. */
4348 queue_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
4350 struct dwarf2_queue_item *item;
4353 item = xmalloc (sizeof (*item));
4354 item->per_cu = per_cu;
4357 if (dwarf2_queue == NULL)
4358 dwarf2_queue = item;
4360 dwarf2_queue_tail->next = item;
4362 dwarf2_queue_tail = item;
4365 /* Process the queue. */
4368 process_queue (struct objfile *objfile)
4370 struct dwarf2_queue_item *item, *next_item;
4372 /* The queue starts out with one item, but following a DIE reference
4373 may load a new CU, adding it to the end of the queue. */
4374 for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
4376 if (dwarf2_per_objfile->using_index
4377 ? !item->per_cu->v.quick->symtab
4378 : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin))
4379 process_full_comp_unit (item->per_cu);
4381 item->per_cu->queued = 0;
4382 next_item = item->next;
4386 dwarf2_queue_tail = NULL;
4389 /* Free all allocated queue entries. This function only releases anything if
4390 an error was thrown; if the queue was processed then it would have been
4391 freed as we went along. */
4394 dwarf2_release_queue (void *dummy)
4396 struct dwarf2_queue_item *item, *last;
4398 item = dwarf2_queue;
4401 /* Anything still marked queued is likely to be in an
4402 inconsistent state, so discard it. */
4403 if (item->per_cu->queued)
4405 if (item->per_cu->cu != NULL)
4406 free_one_cached_comp_unit (item->per_cu->cu);
4407 item->per_cu->queued = 0;
4415 dwarf2_queue = dwarf2_queue_tail = NULL;
4418 /* Read in full symbols for PST, and anything it depends on. */
4421 psymtab_to_symtab_1 (struct partial_symtab *pst)
4423 struct dwarf2_per_cu_data *per_cu;
4424 struct cleanup *back_to;
4427 for (i = 0; i < pst->number_of_dependencies; i++)
4428 if (!pst->dependencies[i]->readin)
4430 /* Inform about additional files that need to be read in. */
4433 /* FIXME: i18n: Need to make this a single string. */
4434 fputs_filtered (" ", gdb_stdout);
4436 fputs_filtered ("and ", gdb_stdout);
4438 printf_filtered ("%s...", pst->dependencies[i]->filename);
4439 wrap_here (""); /* Flush output. */
4440 gdb_flush (gdb_stdout);
4442 psymtab_to_symtab_1 (pst->dependencies[i]);
4445 per_cu = pst->read_symtab_private;
4449 /* It's an include file, no symbols to read for it.
4450 Everything is in the parent symtab. */
4455 dw2_do_instantiate_symtab (pst->objfile, per_cu);
4458 /* Load the DIEs associated with PER_CU into memory. */
4461 load_full_comp_unit (struct dwarf2_per_cu_data *per_cu,
4462 struct objfile *objfile)
4464 bfd *abfd = objfile->obfd;
4465 struct dwarf2_cu *cu;
4466 unsigned int offset;
4467 gdb_byte *info_ptr, *beg_of_comp_unit;
4468 struct cleanup *free_abbrevs_cleanup = NULL, *free_cu_cleanup = NULL;
4469 struct attribute *attr;
4472 gdb_assert (! per_cu->from_debug_types);
4474 /* Set local variables from the partial symbol table info. */
4475 offset = per_cu->offset;
4477 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
4478 info_ptr = dwarf2_per_objfile->info.buffer + offset;
4479 beg_of_comp_unit = info_ptr;
4481 if (per_cu->cu == NULL)
4483 cu = xmalloc (sizeof (*cu));
4484 init_one_comp_unit (cu, objfile);
4488 /* If an error occurs while loading, release our storage. */
4489 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
4491 /* Read in the comp_unit header. */
4492 info_ptr = read_comp_unit_head (&cu->header, info_ptr, abfd);
4494 /* Complete the cu_header. */
4495 cu->header.offset = offset;
4496 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
4498 /* Read the abbrevs for this compilation unit. */
4499 dwarf2_read_abbrevs (abfd, cu);
4500 free_abbrevs_cleanup = make_cleanup (dwarf2_free_abbrev_table, cu);
4502 /* Link this compilation unit into the compilation unit tree. */
4504 cu->per_cu = per_cu;
4506 /* Link this CU into read_in_chain. */
4507 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
4508 dwarf2_per_objfile->read_in_chain = per_cu;
4513 info_ptr += cu->header.first_die_offset;
4516 cu->dies = read_comp_unit (info_ptr, cu);
4518 /* We try not to read any attributes in this function, because not
4519 all objfiles needed for references have been loaded yet, and symbol
4520 table processing isn't initialized. But we have to set the CU language,
4521 or we won't be able to build types correctly. */
4522 prepare_one_comp_unit (cu, cu->dies);
4524 /* Similarly, if we do not read the producer, we can not apply
4525 producer-specific interpretation. */
4526 attr = dwarf2_attr (cu->dies, DW_AT_producer, cu);
4528 cu->producer = DW_STRING (attr);
4532 do_cleanups (free_abbrevs_cleanup);
4534 /* We've successfully allocated this compilation unit. Let our
4535 caller clean it up when finished with it. */
4536 discard_cleanups (free_cu_cleanup);
4540 /* Add a DIE to the delayed physname list. */
4543 add_to_method_list (struct type *type, int fnfield_index, int index,
4544 const char *name, struct die_info *die,
4545 struct dwarf2_cu *cu)
4547 struct delayed_method_info mi;
4549 mi.fnfield_index = fnfield_index;
4553 VEC_safe_push (delayed_method_info, cu->method_list, &mi);
4556 /* A cleanup for freeing the delayed method list. */
4559 free_delayed_list (void *ptr)
4561 struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr;
4562 if (cu->method_list != NULL)
4564 VEC_free (delayed_method_info, cu->method_list);
4565 cu->method_list = NULL;
4569 /* Compute the physnames of any methods on the CU's method list.
4571 The computation of method physnames is delayed in order to avoid the
4572 (bad) condition that one of the method's formal parameters is of an as yet
4576 compute_delayed_physnames (struct dwarf2_cu *cu)
4579 struct delayed_method_info *mi;
4580 for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i)
4583 struct fn_fieldlist *fn_flp
4584 = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index);
4585 physname = (char *) dwarf2_physname ((char *) mi->name, mi->die, cu);
4586 fn_flp->fn_fields[mi->index].physname = physname ? physname : "";
4590 /* Generate full symbol information for PST and CU, whose DIEs have
4591 already been loaded into memory. */
4594 process_full_comp_unit (struct dwarf2_per_cu_data *per_cu)
4596 struct dwarf2_cu *cu = per_cu->cu;
4597 struct objfile *objfile = per_cu->objfile;
4598 CORE_ADDR lowpc, highpc;
4599 struct symtab *symtab;
4600 struct cleanup *back_to, *delayed_list_cleanup;
4603 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
4606 back_to = make_cleanup (really_free_pendings, NULL);
4607 delayed_list_cleanup = make_cleanup (free_delayed_list, cu);
4609 cu->list_in_scope = &file_symbols;
4611 dwarf2_find_base_address (cu->dies, cu);
4613 /* Do line number decoding in read_file_scope () */
4614 process_die (cu->dies, cu);
4616 /* Now that we have processed all the DIEs in the CU, all the types
4617 should be complete, and it should now be safe to compute all of the
4619 compute_delayed_physnames (cu);
4620 do_cleanups (delayed_list_cleanup);
4622 /* Some compilers don't define a DW_AT_high_pc attribute for the
4623 compilation unit. If the DW_AT_high_pc is missing, synthesize
4624 it, by scanning the DIE's below the compilation unit. */
4625 get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
4627 symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
4629 /* Set symtab language to language from DW_AT_language.
4630 If the compilation is from a C file generated by language preprocessors,
4631 do not set the language if it was already deduced by start_subfile. */
4633 && !(cu->language == language_c && symtab->language != language_c))
4635 symtab->language = cu->language;
4638 if (dwarf2_per_objfile->using_index)
4639 per_cu->v.quick->symtab = symtab;
4642 struct partial_symtab *pst = per_cu->v.psymtab;
4643 pst->symtab = symtab;
4647 do_cleanups (back_to);
4650 /* Process a die and its children. */
4653 process_die (struct die_info *die, struct dwarf2_cu *cu)
4657 case DW_TAG_padding:
4659 case DW_TAG_compile_unit:
4660 read_file_scope (die, cu);
4662 case DW_TAG_type_unit:
4663 read_type_unit_scope (die, cu);
4665 case DW_TAG_subprogram:
4666 case DW_TAG_inlined_subroutine:
4667 read_func_scope (die, cu);
4669 case DW_TAG_lexical_block:
4670 case DW_TAG_try_block:
4671 case DW_TAG_catch_block:
4672 read_lexical_block_scope (die, cu);
4674 case DW_TAG_class_type:
4675 case DW_TAG_interface_type:
4676 case DW_TAG_structure_type:
4677 case DW_TAG_union_type:
4678 process_structure_scope (die, cu);
4680 case DW_TAG_enumeration_type:
4681 process_enumeration_scope (die, cu);
4684 /* These dies have a type, but processing them does not create
4685 a symbol or recurse to process the children. Therefore we can
4686 read them on-demand through read_type_die. */
4687 case DW_TAG_subroutine_type:
4688 case DW_TAG_set_type:
4689 case DW_TAG_array_type:
4690 case DW_TAG_pointer_type:
4691 case DW_TAG_ptr_to_member_type:
4692 case DW_TAG_reference_type:
4693 case DW_TAG_string_type:
4696 case DW_TAG_base_type:
4697 case DW_TAG_subrange_type:
4698 case DW_TAG_typedef:
4699 /* Add a typedef symbol for the type definition, if it has a
4701 new_symbol (die, read_type_die (die, cu), cu);
4703 case DW_TAG_common_block:
4704 read_common_block (die, cu);
4706 case DW_TAG_common_inclusion:
4708 case DW_TAG_namespace:
4709 processing_has_namespace_info = 1;
4710 read_namespace (die, cu);
4713 processing_has_namespace_info = 1;
4714 read_module (die, cu);
4716 case DW_TAG_imported_declaration:
4717 case DW_TAG_imported_module:
4718 processing_has_namespace_info = 1;
4719 if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
4720 || cu->language != language_fortran))
4721 complaint (&symfile_complaints, _("Tag '%s' has unexpected children"),
4722 dwarf_tag_name (die->tag));
4723 read_import_statement (die, cu);
4726 new_symbol (die, NULL, cu);
4731 /* A helper function for dwarf2_compute_name which determines whether DIE
4732 needs to have the name of the scope prepended to the name listed in the
4736 die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu)
4738 struct attribute *attr;
4742 case DW_TAG_namespace:
4743 case DW_TAG_typedef:
4744 case DW_TAG_class_type:
4745 case DW_TAG_interface_type:
4746 case DW_TAG_structure_type:
4747 case DW_TAG_union_type:
4748 case DW_TAG_enumeration_type:
4749 case DW_TAG_enumerator:
4750 case DW_TAG_subprogram:
4754 case DW_TAG_variable:
4755 case DW_TAG_constant:
4756 /* We only need to prefix "globally" visible variables. These include
4757 any variable marked with DW_AT_external or any variable that
4758 lives in a namespace. [Variables in anonymous namespaces
4759 require prefixing, but they are not DW_AT_external.] */
4761 if (dwarf2_attr (die, DW_AT_specification, cu))
4763 struct dwarf2_cu *spec_cu = cu;
4765 return die_needs_namespace (die_specification (die, &spec_cu),
4769 attr = dwarf2_attr (die, DW_AT_external, cu);
4770 if (attr == NULL && die->parent->tag != DW_TAG_namespace
4771 && die->parent->tag != DW_TAG_module)
4773 /* A variable in a lexical block of some kind does not need a
4774 namespace, even though in C++ such variables may be external
4775 and have a mangled name. */
4776 if (die->parent->tag == DW_TAG_lexical_block
4777 || die->parent->tag == DW_TAG_try_block
4778 || die->parent->tag == DW_TAG_catch_block
4779 || die->parent->tag == DW_TAG_subprogram)
4788 /* Retrieve the last character from a mem_file. */
4791 do_ui_file_peek_last (void *object, const char *buffer, long length)
4793 char *last_char_p = (char *) object;
4796 *last_char_p = buffer[length - 1];
4799 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
4800 compute the physname for the object, which include a method's
4801 formal parameters (C++/Java) and return type (Java).
4803 For Ada, return the DIE's linkage name rather than the fully qualified
4804 name. PHYSNAME is ignored..
4806 The result is allocated on the objfile_obstack and canonicalized. */
4809 dwarf2_compute_name (char *name, struct die_info *die, struct dwarf2_cu *cu,
4813 name = dwarf2_name (die, cu);
4815 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
4816 compute it by typename_concat inside GDB. */
4817 if (cu->language == language_ada
4818 || (cu->language == language_fortran && physname))
4820 /* For Ada unit, we prefer the linkage name over the name, as
4821 the former contains the exported name, which the user expects
4822 to be able to reference. Ideally, we want the user to be able
4823 to reference this entity using either natural or linkage name,
4824 but we haven't started looking at this enhancement yet. */
4825 struct attribute *attr;
4827 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
4829 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
4830 if (attr && DW_STRING (attr))
4831 return DW_STRING (attr);
4834 /* These are the only languages we know how to qualify names in. */
4836 && (cu->language == language_cplus || cu->language == language_java
4837 || cu->language == language_fortran))
4839 if (die_needs_namespace (die, cu))
4843 struct ui_file *buf;
4845 prefix = determine_prefix (die, cu);
4846 buf = mem_fileopen ();
4847 if (*prefix != '\0')
4849 char *prefixed_name = typename_concat (NULL, prefix, name,
4852 fputs_unfiltered (prefixed_name, buf);
4853 xfree (prefixed_name);
4856 fputs_unfiltered (name, buf);
4858 /* Template parameters may be specified in the DIE's DW_AT_name, or
4859 as children with DW_TAG_template_type_param or
4860 DW_TAG_value_type_param. If the latter, add them to the name
4861 here. If the name already has template parameters, then
4862 skip this step; some versions of GCC emit both, and
4863 it is more efficient to use the pre-computed name.
4865 Something to keep in mind about this process: it is very
4866 unlikely, or in some cases downright impossible, to produce
4867 something that will match the mangled name of a function.
4868 If the definition of the function has the same debug info,
4869 we should be able to match up with it anyway. But fallbacks
4870 using the minimal symbol, for instance to find a method
4871 implemented in a stripped copy of libstdc++, will not work.
4872 If we do not have debug info for the definition, we will have to
4873 match them up some other way.
4875 When we do name matching there is a related problem with function
4876 templates; two instantiated function templates are allowed to
4877 differ only by their return types, which we do not add here. */
4879 if (cu->language == language_cplus && strchr (name, '<') == NULL)
4881 struct attribute *attr;
4882 struct die_info *child;
4885 die->building_fullname = 1;
4887 for (child = die->child; child != NULL; child = child->sibling)
4892 struct dwarf2_locexpr_baton *baton;
4895 if (child->tag != DW_TAG_template_type_param
4896 && child->tag != DW_TAG_template_value_param)
4901 fputs_unfiltered ("<", buf);
4905 fputs_unfiltered (", ", buf);
4907 attr = dwarf2_attr (child, DW_AT_type, cu);
4910 complaint (&symfile_complaints,
4911 _("template parameter missing DW_AT_type"));
4912 fputs_unfiltered ("UNKNOWN_TYPE", buf);
4915 type = die_type (child, cu);
4917 if (child->tag == DW_TAG_template_type_param)
4919 c_print_type (type, "", buf, -1, 0);
4923 attr = dwarf2_attr (child, DW_AT_const_value, cu);
4926 complaint (&symfile_complaints,
4927 _("template parameter missing "
4928 "DW_AT_const_value"));
4929 fputs_unfiltered ("UNKNOWN_VALUE", buf);
4933 dwarf2_const_value_attr (attr, type, name,
4934 &cu->comp_unit_obstack, cu,
4935 &value, &bytes, &baton);
4937 if (TYPE_NOSIGN (type))
4938 /* GDB prints characters as NUMBER 'CHAR'. If that's
4939 changed, this can use value_print instead. */
4940 c_printchar (value, type, buf);
4943 struct value_print_options opts;
4946 v = dwarf2_evaluate_loc_desc (type, NULL,
4950 else if (bytes != NULL)
4952 v = allocate_value (type);
4953 memcpy (value_contents_writeable (v), bytes,
4954 TYPE_LENGTH (type));
4957 v = value_from_longest (type, value);
4959 /* Specify decimal so that we do not depend on
4961 get_formatted_print_options (&opts, 'd');
4963 value_print (v, buf, &opts);
4969 die->building_fullname = 0;
4973 /* Close the argument list, with a space if necessary
4974 (nested templates). */
4975 char last_char = '\0';
4976 ui_file_put (buf, do_ui_file_peek_last, &last_char);
4977 if (last_char == '>')
4978 fputs_unfiltered (" >", buf);
4980 fputs_unfiltered (">", buf);
4984 /* For Java and C++ methods, append formal parameter type
4985 information, if PHYSNAME. */
4987 if (physname && die->tag == DW_TAG_subprogram
4988 && (cu->language == language_cplus
4989 || cu->language == language_java))
4991 struct type *type = read_type_die (die, cu);
4993 c_type_print_args (type, buf, 1, cu->language);
4995 if (cu->language == language_java)
4997 /* For java, we must append the return type to method
4999 if (die->tag == DW_TAG_subprogram)
5000 java_print_type (TYPE_TARGET_TYPE (type), "", buf,
5003 else if (cu->language == language_cplus)
5005 /* Assume that an artificial first parameter is
5006 "this", but do not crash if it is not. RealView
5007 marks unnamed (and thus unused) parameters as
5008 artificial; there is no way to differentiate
5010 if (TYPE_NFIELDS (type) > 0
5011 && TYPE_FIELD_ARTIFICIAL (type, 0)
5012 && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR
5013 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type,
5015 fputs_unfiltered (" const", buf);
5019 name = ui_file_obsavestring (buf, &cu->objfile->objfile_obstack,
5021 ui_file_delete (buf);
5023 if (cu->language == language_cplus)
5026 = dwarf2_canonicalize_name (name, cu,
5027 &cu->objfile->objfile_obstack);
5038 /* Return the fully qualified name of DIE, based on its DW_AT_name.
5039 If scope qualifiers are appropriate they will be added. The result
5040 will be allocated on the objfile_obstack, or NULL if the DIE does
5041 not have a name. NAME may either be from a previous call to
5042 dwarf2_name or NULL.
5044 The output string will be canonicalized (if C++/Java). */
5047 dwarf2_full_name (char *name, struct die_info *die, struct dwarf2_cu *cu)
5049 return dwarf2_compute_name (name, die, cu, 0);
5052 /* Construct a physname for the given DIE in CU. NAME may either be
5053 from a previous call to dwarf2_name or NULL. The result will be
5054 allocated on the objfile_objstack or NULL if the DIE does not have a
5057 The output string will be canonicalized (if C++/Java). */
5060 dwarf2_physname (char *name, struct die_info *die, struct dwarf2_cu *cu)
5062 return dwarf2_compute_name (name, die, cu, 1);
5065 /* Read the import statement specified by the given die and record it. */
5068 read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
5070 struct attribute *import_attr;
5071 struct die_info *imported_die;
5072 struct dwarf2_cu *imported_cu;
5073 const char *imported_name;
5074 const char *imported_name_prefix;
5075 const char *canonical_name;
5076 const char *import_alias;
5077 const char *imported_declaration = NULL;
5078 const char *import_prefix;
5082 import_attr = dwarf2_attr (die, DW_AT_import, cu);
5083 if (import_attr == NULL)
5085 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
5086 dwarf_tag_name (die->tag));
5091 imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu);
5092 imported_name = dwarf2_name (imported_die, imported_cu);
5093 if (imported_name == NULL)
5095 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
5097 The import in the following code:
5111 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
5112 <52> DW_AT_decl_file : 1
5113 <53> DW_AT_decl_line : 6
5114 <54> DW_AT_import : <0x75>
5115 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
5117 <5b> DW_AT_decl_file : 1
5118 <5c> DW_AT_decl_line : 2
5119 <5d> DW_AT_type : <0x6e>
5121 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
5122 <76> DW_AT_byte_size : 4
5123 <77> DW_AT_encoding : 5 (signed)
5125 imports the wrong die ( 0x75 instead of 0x58 ).
5126 This case will be ignored until the gcc bug is fixed. */
5130 /* Figure out the local name after import. */
5131 import_alias = dwarf2_name (die, cu);
5133 /* Figure out where the statement is being imported to. */
5134 import_prefix = determine_prefix (die, cu);
5136 /* Figure out what the scope of the imported die is and prepend it
5137 to the name of the imported die. */
5138 imported_name_prefix = determine_prefix (imported_die, imported_cu);
5140 if (imported_die->tag != DW_TAG_namespace
5141 && imported_die->tag != DW_TAG_module)
5143 imported_declaration = imported_name;
5144 canonical_name = imported_name_prefix;
5146 else if (strlen (imported_name_prefix) > 0)
5148 temp = alloca (strlen (imported_name_prefix)
5149 + 2 + strlen (imported_name) + 1);
5150 strcpy (temp, imported_name_prefix);
5151 strcat (temp, "::");
5152 strcat (temp, imported_name);
5153 canonical_name = temp;
5156 canonical_name = imported_name;
5158 cp_add_using_directive (import_prefix,
5161 imported_declaration,
5162 &cu->objfile->objfile_obstack);
5166 initialize_cu_func_list (struct dwarf2_cu *cu)
5168 cu->first_fn = cu->last_fn = cu->cached_fn = NULL;
5171 /* Cleanup function for read_file_scope. */
5174 free_cu_line_header (void *arg)
5176 struct dwarf2_cu *cu = arg;
5178 free_line_header (cu->line_header);
5179 cu->line_header = NULL;
5183 find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu,
5184 char **name, char **comp_dir)
5186 struct attribute *attr;
5191 /* Find the filename. Do not use dwarf2_name here, since the filename
5192 is not a source language identifier. */
5193 attr = dwarf2_attr (die, DW_AT_name, cu);
5196 *name = DW_STRING (attr);
5199 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
5201 *comp_dir = DW_STRING (attr);
5202 else if (*name != NULL && IS_ABSOLUTE_PATH (*name))
5204 *comp_dir = ldirname (*name);
5205 if (*comp_dir != NULL)
5206 make_cleanup (xfree, *comp_dir);
5208 if (*comp_dir != NULL)
5210 /* Irix 6.2 native cc prepends <machine>.: to the compilation
5211 directory, get rid of it. */
5212 char *cp = strchr (*comp_dir, ':');
5214 if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/')
5219 *name = "<unknown>";
5222 /* Process DW_TAG_compile_unit. */
5225 read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
5227 struct objfile *objfile = cu->objfile;
5228 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
5229 CORE_ADDR lowpc = ((CORE_ADDR) -1);
5230 CORE_ADDR highpc = ((CORE_ADDR) 0);
5231 struct attribute *attr;
5233 char *comp_dir = NULL;
5234 struct die_info *child_die;
5235 bfd *abfd = objfile->obfd;
5236 struct line_header *line_header = 0;
5239 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5241 get_scope_pc_bounds (die, &lowpc, &highpc, cu);
5243 /* If we didn't find a lowpc, set it to highpc to avoid complaints
5244 from finish_block. */
5245 if (lowpc == ((CORE_ADDR) -1))
5250 find_file_and_directory (die, cu, &name, &comp_dir);
5252 attr = dwarf2_attr (die, DW_AT_language, cu);
5255 set_cu_language (DW_UNSND (attr), cu);
5258 attr = dwarf2_attr (die, DW_AT_producer, cu);
5260 cu->producer = DW_STRING (attr);
5262 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
5263 standardised yet. As a workaround for the language detection we fall
5264 back to the DW_AT_producer string. */
5265 if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL)
5266 cu->language = language_opencl;
5268 /* We assume that we're processing GCC output. */
5269 processing_gcc_compilation = 2;
5271 processing_has_namespace_info = 0;
5273 start_symtab (name, comp_dir, lowpc);
5274 record_debugformat ("DWARF 2");
5275 record_producer (cu->producer);
5277 initialize_cu_func_list (cu);
5279 /* Decode line number information if present. We do this before
5280 processing child DIEs, so that the line header table is available
5281 for DW_AT_decl_file. */
5282 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
5285 unsigned int line_offset = DW_UNSND (attr);
5286 line_header = dwarf_decode_line_header (line_offset, abfd, cu);
5289 cu->line_header = line_header;
5290 make_cleanup (free_cu_line_header, cu);
5291 dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL);
5295 /* Process all dies in compilation unit. */
5296 if (die->child != NULL)
5298 child_die = die->child;
5299 while (child_die && child_die->tag)
5301 process_die (child_die, cu);
5302 child_die = sibling_die (child_die);
5306 /* Decode macro information, if present. Dwarf 2 macro information
5307 refers to information in the line number info statement program
5308 header, so we can only read it if we've read the header
5310 attr = dwarf2_attr (die, DW_AT_macro_info, cu);
5311 if (attr && line_header)
5313 unsigned int macro_offset = DW_UNSND (attr);
5315 dwarf_decode_macros (line_header, macro_offset,
5316 comp_dir, abfd, cu);
5318 do_cleanups (back_to);
5321 /* Process DW_TAG_type_unit.
5322 For TUs we want to skip the first top level sibling if it's not the
5323 actual type being defined by this TU. In this case the first top
5324 level sibling is there to provide context only. */
5327 read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
5329 struct objfile *objfile = cu->objfile;
5330 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
5332 struct attribute *attr;
5334 char *comp_dir = NULL;
5335 struct die_info *child_die;
5336 bfd *abfd = objfile->obfd;
5338 /* start_symtab needs a low pc, but we don't really have one.
5339 Do what read_file_scope would do in the absence of such info. */
5340 lowpc = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5342 /* Find the filename. Do not use dwarf2_name here, since the filename
5343 is not a source language identifier. */
5344 attr = dwarf2_attr (die, DW_AT_name, cu);
5346 name = DW_STRING (attr);
5348 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
5350 comp_dir = DW_STRING (attr);
5351 else if (name != NULL && IS_ABSOLUTE_PATH (name))
5353 comp_dir = ldirname (name);
5354 if (comp_dir != NULL)
5355 make_cleanup (xfree, comp_dir);
5361 attr = dwarf2_attr (die, DW_AT_language, cu);
5363 set_cu_language (DW_UNSND (attr), cu);
5365 /* This isn't technically needed today. It is done for symmetry
5366 with read_file_scope. */
5367 attr = dwarf2_attr (die, DW_AT_producer, cu);
5369 cu->producer = DW_STRING (attr);
5371 /* We assume that we're processing GCC output. */
5372 processing_gcc_compilation = 2;
5374 processing_has_namespace_info = 0;
5376 start_symtab (name, comp_dir, lowpc);
5377 record_debugformat ("DWARF 2");
5378 record_producer (cu->producer);
5380 /* Process the dies in the type unit. */
5381 if (die->child == NULL)
5383 dump_die_for_error (die);
5384 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
5385 bfd_get_filename (abfd));
5388 child_die = die->child;
5390 while (child_die && child_die->tag)
5392 process_die (child_die, cu);
5394 child_die = sibling_die (child_die);
5397 do_cleanups (back_to);
5401 add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc,
5402 struct dwarf2_cu *cu)
5404 struct function_range *thisfn;
5406 thisfn = (struct function_range *)
5407 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range));
5408 thisfn->name = name;
5409 thisfn->lowpc = lowpc;
5410 thisfn->highpc = highpc;
5411 thisfn->seen_line = 0;
5412 thisfn->next = NULL;
5414 if (cu->last_fn == NULL)
5415 cu->first_fn = thisfn;
5417 cu->last_fn->next = thisfn;
5419 cu->last_fn = thisfn;
5422 /* qsort helper for inherit_abstract_dies. */
5425 unsigned_int_compar (const void *ap, const void *bp)
5427 unsigned int a = *(unsigned int *) ap;
5428 unsigned int b = *(unsigned int *) bp;
5430 return (a > b) - (b > a);
5433 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
5434 Inherit only the children of the DW_AT_abstract_origin DIE not being
5435 already referenced by DW_AT_abstract_origin from the children of the
5439 inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
5441 struct die_info *child_die;
5442 unsigned die_children_count;
5443 /* CU offsets which were referenced by children of the current DIE. */
5445 unsigned *offsets_end, *offsetp;
5446 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
5447 struct die_info *origin_die;
5448 /* Iterator of the ORIGIN_DIE children. */
5449 struct die_info *origin_child_die;
5450 struct cleanup *cleanups;
5451 struct attribute *attr;
5452 struct dwarf2_cu *origin_cu;
5453 struct pending **origin_previous_list_in_scope;
5455 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
5459 /* Note that following die references may follow to a die in a
5463 origin_die = follow_die_ref (die, attr, &origin_cu);
5465 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
5467 origin_previous_list_in_scope = origin_cu->list_in_scope;
5468 origin_cu->list_in_scope = cu->list_in_scope;
5470 if (die->tag != origin_die->tag
5471 && !(die->tag == DW_TAG_inlined_subroutine
5472 && origin_die->tag == DW_TAG_subprogram))
5473 complaint (&symfile_complaints,
5474 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
5475 die->offset, origin_die->offset);
5477 child_die = die->child;
5478 die_children_count = 0;
5479 while (child_die && child_die->tag)
5481 child_die = sibling_die (child_die);
5482 die_children_count++;
5484 offsets = xmalloc (sizeof (*offsets) * die_children_count);
5485 cleanups = make_cleanup (xfree, offsets);
5487 offsets_end = offsets;
5488 child_die = die->child;
5489 while (child_die && child_die->tag)
5491 /* For each CHILD_DIE, find the corresponding child of
5492 ORIGIN_DIE. If there is more than one layer of
5493 DW_AT_abstract_origin, follow them all; there shouldn't be,
5494 but GCC versions at least through 4.4 generate this (GCC PR
5496 struct die_info *child_origin_die = child_die;
5497 struct dwarf2_cu *child_origin_cu = cu;
5501 attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin,
5505 child_origin_die = follow_die_ref (child_origin_die, attr,
5509 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
5510 counterpart may exist. */
5511 if (child_origin_die != child_die)
5513 if (child_die->tag != child_origin_die->tag
5514 && !(child_die->tag == DW_TAG_inlined_subroutine
5515 && child_origin_die->tag == DW_TAG_subprogram))
5516 complaint (&symfile_complaints,
5517 _("Child DIE 0x%x and its abstract origin 0x%x have "
5518 "different tags"), child_die->offset,
5519 child_origin_die->offset);
5520 if (child_origin_die->parent != origin_die)
5521 complaint (&symfile_complaints,
5522 _("Child DIE 0x%x and its abstract origin 0x%x have "
5523 "different parents"), child_die->offset,
5524 child_origin_die->offset);
5526 *offsets_end++ = child_origin_die->offset;
5528 child_die = sibling_die (child_die);
5530 qsort (offsets, offsets_end - offsets, sizeof (*offsets),
5531 unsigned_int_compar);
5532 for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++)
5533 if (offsetp[-1] == *offsetp)
5534 complaint (&symfile_complaints,
5535 _("Multiple children of DIE 0x%x refer "
5536 "to DIE 0x%x as their abstract origin"),
5537 die->offset, *offsetp);
5540 origin_child_die = origin_die->child;
5541 while (origin_child_die && origin_child_die->tag)
5543 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
5544 while (offsetp < offsets_end && *offsetp < origin_child_die->offset)
5546 if (offsetp >= offsets_end || *offsetp > origin_child_die->offset)
5548 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
5549 process_die (origin_child_die, origin_cu);
5551 origin_child_die = sibling_die (origin_child_die);
5553 origin_cu->list_in_scope = origin_previous_list_in_scope;
5555 do_cleanups (cleanups);
5559 read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
5561 struct objfile *objfile = cu->objfile;
5562 struct context_stack *new;
5565 struct die_info *child_die;
5566 struct attribute *attr, *call_line, *call_file;
5569 struct block *block;
5570 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
5571 VEC (symbolp) *template_args = NULL;
5572 struct template_symbol *templ_func = NULL;
5576 /* If we do not have call site information, we can't show the
5577 caller of this inlined function. That's too confusing, so
5578 only use the scope for local variables. */
5579 call_line = dwarf2_attr (die, DW_AT_call_line, cu);
5580 call_file = dwarf2_attr (die, DW_AT_call_file, cu);
5581 if (call_line == NULL || call_file == NULL)
5583 read_lexical_block_scope (die, cu);
5588 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5590 name = dwarf2_name (die, cu);
5592 /* Ignore functions with missing or empty names. These are actually
5593 illegal according to the DWARF standard. */
5596 complaint (&symfile_complaints,
5597 _("missing name for subprogram DIE at %d"), die->offset);
5601 /* Ignore functions with missing or invalid low and high pc attributes. */
5602 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
5604 attr = dwarf2_attr (die, DW_AT_external, cu);
5605 if (!attr || !DW_UNSND (attr))
5606 complaint (&symfile_complaints,
5607 _("cannot get low and high bounds "
5608 "for subprogram DIE at %d"),
5616 /* Record the function range for dwarf_decode_lines. */
5617 add_to_cu_func_list (name, lowpc, highpc, cu);
5619 /* If we have any template arguments, then we must allocate a
5620 different sort of symbol. */
5621 for (child_die = die->child; child_die; child_die = sibling_die (child_die))
5623 if (child_die->tag == DW_TAG_template_type_param
5624 || child_die->tag == DW_TAG_template_value_param)
5626 templ_func = OBSTACK_ZALLOC (&objfile->objfile_obstack,
5627 struct template_symbol);
5628 templ_func->base.is_cplus_template_function = 1;
5633 new = push_context (0, lowpc);
5634 new->name = new_symbol_full (die, read_type_die (die, cu), cu,
5635 (struct symbol *) templ_func);
5637 /* If there is a location expression for DW_AT_frame_base, record
5639 attr = dwarf2_attr (die, DW_AT_frame_base, cu);
5641 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
5642 expression is being recorded directly in the function's symbol
5643 and not in a separate frame-base object. I guess this hack is
5644 to avoid adding some sort of frame-base adjunct/annex to the
5645 function's symbol :-(. The problem with doing this is that it
5646 results in a function symbol with a location expression that
5647 has nothing to do with the location of the function, ouch! The
5648 relationship should be: a function's symbol has-a frame base; a
5649 frame-base has-a location expression. */
5650 dwarf2_symbol_mark_computed (attr, new->name, cu);
5652 cu->list_in_scope = &local_symbols;
5654 if (die->child != NULL)
5656 child_die = die->child;
5657 while (child_die && child_die->tag)
5659 if (child_die->tag == DW_TAG_template_type_param
5660 || child_die->tag == DW_TAG_template_value_param)
5662 struct symbol *arg = new_symbol (child_die, NULL, cu);
5665 VEC_safe_push (symbolp, template_args, arg);
5668 process_die (child_die, cu);
5669 child_die = sibling_die (child_die);
5673 inherit_abstract_dies (die, cu);
5675 /* If we have a DW_AT_specification, we might need to import using
5676 directives from the context of the specification DIE. See the
5677 comment in determine_prefix. */
5678 if (cu->language == language_cplus
5679 && dwarf2_attr (die, DW_AT_specification, cu))
5681 struct dwarf2_cu *spec_cu = cu;
5682 struct die_info *spec_die = die_specification (die, &spec_cu);
5686 child_die = spec_die->child;
5687 while (child_die && child_die->tag)
5689 if (child_die->tag == DW_TAG_imported_module)
5690 process_die (child_die, spec_cu);
5691 child_die = sibling_die (child_die);
5694 /* In some cases, GCC generates specification DIEs that
5695 themselves contain DW_AT_specification attributes. */
5696 spec_die = die_specification (spec_die, &spec_cu);
5700 new = pop_context ();
5701 /* Make a block for the local symbols within. */
5702 block = finish_block (new->name, &local_symbols, new->old_blocks,
5703 lowpc, highpc, objfile);
5705 /* For C++, set the block's scope. */
5706 if (cu->language == language_cplus || cu->language == language_fortran)
5707 cp_set_block_scope (new->name, block, &objfile->objfile_obstack,
5708 determine_prefix (die, cu),
5709 processing_has_namespace_info);
5711 /* If we have address ranges, record them. */
5712 dwarf2_record_block_ranges (die, block, baseaddr, cu);
5714 /* Attach template arguments to function. */
5715 if (! VEC_empty (symbolp, template_args))
5717 gdb_assert (templ_func != NULL);
5719 templ_func->n_template_arguments = VEC_length (symbolp, template_args);
5720 templ_func->template_arguments
5721 = obstack_alloc (&objfile->objfile_obstack,
5722 (templ_func->n_template_arguments
5723 * sizeof (struct symbol *)));
5724 memcpy (templ_func->template_arguments,
5725 VEC_address (symbolp, template_args),
5726 (templ_func->n_template_arguments * sizeof (struct symbol *)));
5727 VEC_free (symbolp, template_args);
5730 /* In C++, we can have functions nested inside functions (e.g., when
5731 a function declares a class that has methods). This means that
5732 when we finish processing a function scope, we may need to go
5733 back to building a containing block's symbol lists. */
5734 local_symbols = new->locals;
5735 param_symbols = new->params;
5736 using_directives = new->using_directives;
5738 /* If we've finished processing a top-level function, subsequent
5739 symbols go in the file symbol list. */
5740 if (outermost_context_p ())
5741 cu->list_in_scope = &file_symbols;
5744 /* Process all the DIES contained within a lexical block scope. Start
5745 a new scope, process the dies, and then close the scope. */
5748 read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
5750 struct objfile *objfile = cu->objfile;
5751 struct context_stack *new;
5752 CORE_ADDR lowpc, highpc;
5753 struct die_info *child_die;
5756 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5758 /* Ignore blocks with missing or invalid low and high pc attributes. */
5759 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
5760 as multiple lexical blocks? Handling children in a sane way would
5761 be nasty. Might be easier to properly extend generic blocks to
5763 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
5768 push_context (0, lowpc);
5769 if (die->child != NULL)
5771 child_die = die->child;
5772 while (child_die && child_die->tag)
5774 process_die (child_die, cu);
5775 child_die = sibling_die (child_die);
5778 new = pop_context ();
5780 if (local_symbols != NULL || using_directives != NULL)
5783 = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
5786 /* Note that recording ranges after traversing children, as we
5787 do here, means that recording a parent's ranges entails
5788 walking across all its children's ranges as they appear in
5789 the address map, which is quadratic behavior.
5791 It would be nicer to record the parent's ranges before
5792 traversing its children, simply overriding whatever you find
5793 there. But since we don't even decide whether to create a
5794 block until after we've traversed its children, that's hard
5796 dwarf2_record_block_ranges (die, block, baseaddr, cu);
5798 local_symbols = new->locals;
5799 using_directives = new->using_directives;
5802 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
5803 Return 1 if the attributes are present and valid, otherwise, return 0.
5804 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
5807 dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
5808 CORE_ADDR *high_return, struct dwarf2_cu *cu,
5809 struct partial_symtab *ranges_pst)
5811 struct objfile *objfile = cu->objfile;
5812 struct comp_unit_head *cu_header = &cu->header;
5813 bfd *obfd = objfile->obfd;
5814 unsigned int addr_size = cu_header->addr_size;
5815 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
5816 /* Base address selection entry. */
5827 found_base = cu->base_known;
5828 base = cu->base_address;
5830 dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
5831 if (offset >= dwarf2_per_objfile->ranges.size)
5833 complaint (&symfile_complaints,
5834 _("Offset %d out of bounds for DW_AT_ranges attribute"),
5838 buffer = dwarf2_per_objfile->ranges.buffer + offset;
5840 /* Read in the largest possible address. */
5841 marker = read_address (obfd, buffer, cu, &dummy);
5842 if ((marker & mask) == mask)
5844 /* If we found the largest possible address, then
5845 read the base address. */
5846 base = read_address (obfd, buffer + addr_size, cu, &dummy);
5847 buffer += 2 * addr_size;
5848 offset += 2 * addr_size;
5854 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5858 CORE_ADDR range_beginning, range_end;
5860 range_beginning = read_address (obfd, buffer, cu, &dummy);
5861 buffer += addr_size;
5862 range_end = read_address (obfd, buffer, cu, &dummy);
5863 buffer += addr_size;
5864 offset += 2 * addr_size;
5866 /* An end of list marker is a pair of zero addresses. */
5867 if (range_beginning == 0 && range_end == 0)
5868 /* Found the end of list entry. */
5871 /* Each base address selection entry is a pair of 2 values.
5872 The first is the largest possible address, the second is
5873 the base address. Check for a base address here. */
5874 if ((range_beginning & mask) == mask)
5876 /* If we found the largest possible address, then
5877 read the base address. */
5878 base = read_address (obfd, buffer + addr_size, cu, &dummy);
5885 /* We have no valid base address for the ranges
5887 complaint (&symfile_complaints,
5888 _("Invalid .debug_ranges data (no base address)"));
5892 if (range_beginning > range_end)
5894 /* Inverted range entries are invalid. */
5895 complaint (&symfile_complaints,
5896 _("Invalid .debug_ranges data (inverted range)"));
5900 /* Empty range entries have no effect. */
5901 if (range_beginning == range_end)
5904 range_beginning += base;
5907 if (ranges_pst != NULL)
5908 addrmap_set_empty (objfile->psymtabs_addrmap,
5909 range_beginning + baseaddr,
5910 range_end - 1 + baseaddr,
5913 /* FIXME: This is recording everything as a low-high
5914 segment of consecutive addresses. We should have a
5915 data structure for discontiguous block ranges
5919 low = range_beginning;
5925 if (range_beginning < low)
5926 low = range_beginning;
5927 if (range_end > high)
5933 /* If the first entry is an end-of-list marker, the range
5934 describes an empty scope, i.e. no instructions. */
5940 *high_return = high;
5944 /* Get low and high pc attributes from a die. Return 1 if the attributes
5945 are present and valid, otherwise, return 0. Return -1 if the range is
5946 discontinuous, i.e. derived from DW_AT_ranges information. */
5948 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
5949 CORE_ADDR *highpc, struct dwarf2_cu *cu,
5950 struct partial_symtab *pst)
5952 struct attribute *attr;
5957 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
5960 high = DW_ADDR (attr);
5961 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
5963 low = DW_ADDR (attr);
5965 /* Found high w/o low attribute. */
5968 /* Found consecutive range of addresses. */
5973 attr = dwarf2_attr (die, DW_AT_ranges, cu);
5976 /* Value of the DW_AT_ranges attribute is the offset in the
5977 .debug_ranges section. */
5978 if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu, pst))
5980 /* Found discontinuous range of addresses. */
5985 /* read_partial_die has also the strict LOW < HIGH requirement. */
5989 /* When using the GNU linker, .gnu.linkonce. sections are used to
5990 eliminate duplicate copies of functions and vtables and such.
5991 The linker will arbitrarily choose one and discard the others.
5992 The AT_*_pc values for such functions refer to local labels in
5993 these sections. If the section from that file was discarded, the
5994 labels are not in the output, so the relocs get a value of 0.
5995 If this is a discarded function, mark the pc bounds as invalid,
5996 so that GDB will ignore it. */
5997 if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
6005 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
6006 its low and high PC addresses. Do nothing if these addresses could not
6007 be determined. Otherwise, set LOWPC to the low address if it is smaller,
6008 and HIGHPC to the high address if greater than HIGHPC. */
6011 dwarf2_get_subprogram_pc_bounds (struct die_info *die,
6012 CORE_ADDR *lowpc, CORE_ADDR *highpc,
6013 struct dwarf2_cu *cu)
6015 CORE_ADDR low, high;
6016 struct die_info *child = die->child;
6018 if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL))
6020 *lowpc = min (*lowpc, low);
6021 *highpc = max (*highpc, high);
6024 /* If the language does not allow nested subprograms (either inside
6025 subprograms or lexical blocks), we're done. */
6026 if (cu->language != language_ada)
6029 /* Check all the children of the given DIE. If it contains nested
6030 subprograms, then check their pc bounds. Likewise, we need to
6031 check lexical blocks as well, as they may also contain subprogram
6033 while (child && child->tag)
6035 if (child->tag == DW_TAG_subprogram
6036 || child->tag == DW_TAG_lexical_block)
6037 dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu);
6038 child = sibling_die (child);
6042 /* Get the low and high pc's represented by the scope DIE, and store
6043 them in *LOWPC and *HIGHPC. If the correct values can't be
6044 determined, set *LOWPC to -1 and *HIGHPC to 0. */
6047 get_scope_pc_bounds (struct die_info *die,
6048 CORE_ADDR *lowpc, CORE_ADDR *highpc,
6049 struct dwarf2_cu *cu)
6051 CORE_ADDR best_low = (CORE_ADDR) -1;
6052 CORE_ADDR best_high = (CORE_ADDR) 0;
6053 CORE_ADDR current_low, current_high;
6055 if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL))
6057 best_low = current_low;
6058 best_high = current_high;
6062 struct die_info *child = die->child;
6064 while (child && child->tag)
6066 switch (child->tag) {
6067 case DW_TAG_subprogram:
6068 dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu);
6070 case DW_TAG_namespace:
6072 /* FIXME: carlton/2004-01-16: Should we do this for
6073 DW_TAG_class_type/DW_TAG_structure_type, too? I think
6074 that current GCC's always emit the DIEs corresponding
6075 to definitions of methods of classes as children of a
6076 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
6077 the DIEs giving the declarations, which could be
6078 anywhere). But I don't see any reason why the
6079 standards says that they have to be there. */
6080 get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
6082 if (current_low != ((CORE_ADDR) -1))
6084 best_low = min (best_low, current_low);
6085 best_high = max (best_high, current_high);
6093 child = sibling_die (child);
6098 *highpc = best_high;
6101 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
6104 dwarf2_record_block_ranges (struct die_info *die, struct block *block,
6105 CORE_ADDR baseaddr, struct dwarf2_cu *cu)
6107 struct attribute *attr;
6109 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
6112 CORE_ADDR high = DW_ADDR (attr);
6114 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
6117 CORE_ADDR low = DW_ADDR (attr);
6119 record_block_range (block, baseaddr + low, baseaddr + high - 1);
6123 attr = dwarf2_attr (die, DW_AT_ranges, cu);
6126 bfd *obfd = cu->objfile->obfd;
6128 /* The value of the DW_AT_ranges attribute is the offset of the
6129 address range list in the .debug_ranges section. */
6130 unsigned long offset = DW_UNSND (attr);
6131 gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset;
6133 /* For some target architectures, but not others, the
6134 read_address function sign-extends the addresses it returns.
6135 To recognize base address selection entries, we need a
6137 unsigned int addr_size = cu->header.addr_size;
6138 CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
6140 /* The base address, to which the next pair is relative. Note
6141 that this 'base' is a DWARF concept: most entries in a range
6142 list are relative, to reduce the number of relocs against the
6143 debugging information. This is separate from this function's
6144 'baseaddr' argument, which GDB uses to relocate debugging
6145 information from a shared library based on the address at
6146 which the library was loaded. */
6147 CORE_ADDR base = cu->base_address;
6148 int base_known = cu->base_known;
6150 gdb_assert (dwarf2_per_objfile->ranges.readin);
6151 if (offset >= dwarf2_per_objfile->ranges.size)
6153 complaint (&symfile_complaints,
6154 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
6161 unsigned int bytes_read;
6162 CORE_ADDR start, end;
6164 start = read_address (obfd, buffer, cu, &bytes_read);
6165 buffer += bytes_read;
6166 end = read_address (obfd, buffer, cu, &bytes_read);
6167 buffer += bytes_read;
6169 /* Did we find the end of the range list? */
6170 if (start == 0 && end == 0)
6173 /* Did we find a base address selection entry? */
6174 else if ((start & base_select_mask) == base_select_mask)
6180 /* We found an ordinary address range. */
6185 complaint (&symfile_complaints,
6186 _("Invalid .debug_ranges data "
6187 "(no base address)"));
6193 /* Inverted range entries are invalid. */
6194 complaint (&symfile_complaints,
6195 _("Invalid .debug_ranges data "
6196 "(inverted range)"));
6200 /* Empty range entries have no effect. */
6204 record_block_range (block,
6205 baseaddr + base + start,
6206 baseaddr + base + end - 1);
6212 /* Add an aggregate field to the field list. */
6215 dwarf2_add_field (struct field_info *fip, struct die_info *die,
6216 struct dwarf2_cu *cu)
6218 struct objfile *objfile = cu->objfile;
6219 struct gdbarch *gdbarch = get_objfile_arch (objfile);
6220 struct nextfield *new_field;
6221 struct attribute *attr;
6223 char *fieldname = "";
6225 /* Allocate a new field list entry and link it in. */
6226 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
6227 make_cleanup (xfree, new_field);
6228 memset (new_field, 0, sizeof (struct nextfield));
6230 if (die->tag == DW_TAG_inheritance)
6232 new_field->next = fip->baseclasses;
6233 fip->baseclasses = new_field;
6237 new_field->next = fip->fields;
6238 fip->fields = new_field;
6242 /* Handle accessibility and virtuality of field.
6243 The default accessibility for members is public, the default
6244 accessibility for inheritance is private. */
6245 if (die->tag != DW_TAG_inheritance)
6246 new_field->accessibility = DW_ACCESS_public;
6248 new_field->accessibility = DW_ACCESS_private;
6249 new_field->virtuality = DW_VIRTUALITY_none;
6251 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
6253 new_field->accessibility = DW_UNSND (attr);
6254 if (new_field->accessibility != DW_ACCESS_public)
6255 fip->non_public_fields = 1;
6256 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
6258 new_field->virtuality = DW_UNSND (attr);
6260 fp = &new_field->field;
6262 if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
6264 /* Data member other than a C++ static data member. */
6266 /* Get type of field. */
6267 fp->type = die_type (die, cu);
6269 SET_FIELD_BITPOS (*fp, 0);
6271 /* Get bit size of field (zero if none). */
6272 attr = dwarf2_attr (die, DW_AT_bit_size, cu);
6275 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
6279 FIELD_BITSIZE (*fp) = 0;
6282 /* Get bit offset of field. */
6283 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
6286 int byte_offset = 0;
6288 if (attr_form_is_section_offset (attr))
6289 dwarf2_complex_location_expr_complaint ();
6290 else if (attr_form_is_constant (attr))
6291 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
6292 else if (attr_form_is_block (attr))
6293 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
6295 dwarf2_complex_location_expr_complaint ();
6297 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
6299 attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
6302 if (gdbarch_bits_big_endian (gdbarch))
6304 /* For big endian bits, the DW_AT_bit_offset gives the
6305 additional bit offset from the MSB of the containing
6306 anonymous object to the MSB of the field. We don't
6307 have to do anything special since we don't need to
6308 know the size of the anonymous object. */
6309 FIELD_BITPOS (*fp) += DW_UNSND (attr);
6313 /* For little endian bits, compute the bit offset to the
6314 MSB of the anonymous object, subtract off the number of
6315 bits from the MSB of the field to the MSB of the
6316 object, and then subtract off the number of bits of
6317 the field itself. The result is the bit offset of
6318 the LSB of the field. */
6320 int bit_offset = DW_UNSND (attr);
6322 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6325 /* The size of the anonymous object containing
6326 the bit field is explicit, so use the
6327 indicated size (in bytes). */
6328 anonymous_size = DW_UNSND (attr);
6332 /* The size of the anonymous object containing
6333 the bit field must be inferred from the type
6334 attribute of the data member containing the
6336 anonymous_size = TYPE_LENGTH (fp->type);
6338 FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
6339 - bit_offset - FIELD_BITSIZE (*fp);
6343 /* Get name of field. */
6344 fieldname = dwarf2_name (die, cu);
6345 if (fieldname == NULL)
6348 /* The name is already allocated along with this objfile, so we don't
6349 need to duplicate it for the type. */
6350 fp->name = fieldname;
6352 /* Change accessibility for artificial fields (e.g. virtual table
6353 pointer or virtual base class pointer) to private. */
6354 if (dwarf2_attr (die, DW_AT_artificial, cu))
6356 FIELD_ARTIFICIAL (*fp) = 1;
6357 new_field->accessibility = DW_ACCESS_private;
6358 fip->non_public_fields = 1;
6361 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
6363 /* C++ static member. */
6365 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
6366 is a declaration, but all versions of G++ as of this writing
6367 (so through at least 3.2.1) incorrectly generate
6368 DW_TAG_variable tags. */
6372 /* Get name of field. */
6373 fieldname = dwarf2_name (die, cu);
6374 if (fieldname == NULL)
6377 attr = dwarf2_attr (die, DW_AT_const_value, cu);
6379 /* Only create a symbol if this is an external value.
6380 new_symbol checks this and puts the value in the global symbol
6381 table, which we want. If it is not external, new_symbol
6382 will try to put the value in cu->list_in_scope which is wrong. */
6383 && dwarf2_flag_true_p (die, DW_AT_external, cu))
6385 /* A static const member, not much different than an enum as far as
6386 we're concerned, except that we can support more types. */
6387 new_symbol (die, NULL, cu);
6390 /* Get physical name. */
6391 physname = (char *) dwarf2_physname (fieldname, die, cu);
6393 /* The name is already allocated along with this objfile, so we don't
6394 need to duplicate it for the type. */
6395 SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
6396 FIELD_TYPE (*fp) = die_type (die, cu);
6397 FIELD_NAME (*fp) = fieldname;
6399 else if (die->tag == DW_TAG_inheritance)
6401 /* C++ base class field. */
6402 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
6405 int byte_offset = 0;
6407 if (attr_form_is_section_offset (attr))
6408 dwarf2_complex_location_expr_complaint ();
6409 else if (attr_form_is_constant (attr))
6410 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
6411 else if (attr_form_is_block (attr))
6412 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
6414 dwarf2_complex_location_expr_complaint ();
6416 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
6418 FIELD_BITSIZE (*fp) = 0;
6419 FIELD_TYPE (*fp) = die_type (die, cu);
6420 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
6421 fip->nbaseclasses++;
6425 /* Add a typedef defined in the scope of the FIP's class. */
6428 dwarf2_add_typedef (struct field_info *fip, struct die_info *die,
6429 struct dwarf2_cu *cu)
6431 struct objfile *objfile = cu->objfile;
6432 struct typedef_field_list *new_field;
6433 struct attribute *attr;
6434 struct typedef_field *fp;
6435 char *fieldname = "";
6437 /* Allocate a new field list entry and link it in. */
6438 new_field = xzalloc (sizeof (*new_field));
6439 make_cleanup (xfree, new_field);
6441 gdb_assert (die->tag == DW_TAG_typedef);
6443 fp = &new_field->field;
6445 /* Get name of field. */
6446 fp->name = dwarf2_name (die, cu);
6447 if (fp->name == NULL)
6450 fp->type = read_type_die (die, cu);
6452 new_field->next = fip->typedef_field_list;
6453 fip->typedef_field_list = new_field;
6454 fip->typedef_field_list_count++;
6457 /* Create the vector of fields, and attach it to the type. */
6460 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
6461 struct dwarf2_cu *cu)
6463 int nfields = fip->nfields;
6465 /* Record the field count, allocate space for the array of fields,
6466 and create blank accessibility bitfields if necessary. */
6467 TYPE_NFIELDS (type) = nfields;
6468 TYPE_FIELDS (type) = (struct field *)
6469 TYPE_ALLOC (type, sizeof (struct field) * nfields);
6470 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
6472 if (fip->non_public_fields && cu->language != language_ada)
6474 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6476 TYPE_FIELD_PRIVATE_BITS (type) =
6477 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
6478 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
6480 TYPE_FIELD_PROTECTED_BITS (type) =
6481 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
6482 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
6484 TYPE_FIELD_IGNORE_BITS (type) =
6485 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
6486 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
6489 /* If the type has baseclasses, allocate and clear a bit vector for
6490 TYPE_FIELD_VIRTUAL_BITS. */
6491 if (fip->nbaseclasses && cu->language != language_ada)
6493 int num_bytes = B_BYTES (fip->nbaseclasses);
6494 unsigned char *pointer;
6496 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6497 pointer = TYPE_ALLOC (type, num_bytes);
6498 TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
6499 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
6500 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
6503 /* Copy the saved-up fields into the field vector. Start from the head of
6504 the list, adding to the tail of the field array, so that they end up in
6505 the same order in the array in which they were added to the list. */
6506 while (nfields-- > 0)
6508 struct nextfield *fieldp;
6512 fieldp = fip->fields;
6513 fip->fields = fieldp->next;
6517 fieldp = fip->baseclasses;
6518 fip->baseclasses = fieldp->next;
6521 TYPE_FIELD (type, nfields) = fieldp->field;
6522 switch (fieldp->accessibility)
6524 case DW_ACCESS_private:
6525 if (cu->language != language_ada)
6526 SET_TYPE_FIELD_PRIVATE (type, nfields);
6529 case DW_ACCESS_protected:
6530 if (cu->language != language_ada)
6531 SET_TYPE_FIELD_PROTECTED (type, nfields);
6534 case DW_ACCESS_public:
6538 /* Unknown accessibility. Complain and treat it as public. */
6540 complaint (&symfile_complaints, _("unsupported accessibility %d"),
6541 fieldp->accessibility);
6545 if (nfields < fip->nbaseclasses)
6547 switch (fieldp->virtuality)
6549 case DW_VIRTUALITY_virtual:
6550 case DW_VIRTUALITY_pure_virtual:
6551 if (cu->language == language_ada)
6552 error (_("unexpected virtuality in component of Ada type"));
6553 SET_TYPE_FIELD_VIRTUAL (type, nfields);
6560 /* Add a member function to the proper fieldlist. */
6563 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
6564 struct type *type, struct dwarf2_cu *cu)
6566 struct objfile *objfile = cu->objfile;
6567 struct attribute *attr;
6568 struct fnfieldlist *flp;
6570 struct fn_field *fnp;
6572 struct nextfnfield *new_fnfield;
6573 struct type *this_type;
6575 if (cu->language == language_ada)
6576 error (_("unexpected member function in Ada type"));
6578 /* Get name of member function. */
6579 fieldname = dwarf2_name (die, cu);
6580 if (fieldname == NULL)
6583 /* Look up member function name in fieldlist. */
6584 for (i = 0; i < fip->nfnfields; i++)
6586 if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
6590 /* Create new list element if necessary. */
6591 if (i < fip->nfnfields)
6592 flp = &fip->fnfieldlists[i];
6595 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
6597 fip->fnfieldlists = (struct fnfieldlist *)
6598 xrealloc (fip->fnfieldlists,
6599 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
6600 * sizeof (struct fnfieldlist));
6601 if (fip->nfnfields == 0)
6602 make_cleanup (free_current_contents, &fip->fnfieldlists);
6604 flp = &fip->fnfieldlists[fip->nfnfields];
6605 flp->name = fieldname;
6608 i = fip->nfnfields++;
6611 /* Create a new member function field and chain it to the field list
6613 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
6614 make_cleanup (xfree, new_fnfield);
6615 memset (new_fnfield, 0, sizeof (struct nextfnfield));
6616 new_fnfield->next = flp->head;
6617 flp->head = new_fnfield;
6620 /* Fill in the member function field info. */
6621 fnp = &new_fnfield->fnfield;
6623 /* Delay processing of the physname until later. */
6624 if (cu->language == language_cplus || cu->language == language_java)
6626 add_to_method_list (type, i, flp->length - 1, fieldname,
6631 char *physname = (char *) dwarf2_physname (fieldname, die, cu);
6632 fnp->physname = physname ? physname : "";
6635 fnp->type = alloc_type (objfile);
6636 this_type = read_type_die (die, cu);
6637 if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC)
6639 int nparams = TYPE_NFIELDS (this_type);
6641 /* TYPE is the domain of this method, and THIS_TYPE is the type
6642 of the method itself (TYPE_CODE_METHOD). */
6643 smash_to_method_type (fnp->type, type,
6644 TYPE_TARGET_TYPE (this_type),
6645 TYPE_FIELDS (this_type),
6646 TYPE_NFIELDS (this_type),
6647 TYPE_VARARGS (this_type));
6649 /* Handle static member functions.
6650 Dwarf2 has no clean way to discern C++ static and non-static
6651 member functions. G++ helps GDB by marking the first
6652 parameter for non-static member functions (which is the this
6653 pointer) as artificial. We obtain this information from
6654 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
6655 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0)
6656 fnp->voffset = VOFFSET_STATIC;
6659 complaint (&symfile_complaints, _("member function type missing for '%s'"),
6660 dwarf2_full_name (fieldname, die, cu));
6662 /* Get fcontext from DW_AT_containing_type if present. */
6663 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
6664 fnp->fcontext = die_containing_type (die, cu);
6666 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
6667 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
6669 /* Get accessibility. */
6670 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
6673 switch (DW_UNSND (attr))
6675 case DW_ACCESS_private:
6676 fnp->is_private = 1;
6678 case DW_ACCESS_protected:
6679 fnp->is_protected = 1;
6684 /* Check for artificial methods. */
6685 attr = dwarf2_attr (die, DW_AT_artificial, cu);
6686 if (attr && DW_UNSND (attr) != 0)
6687 fnp->is_artificial = 1;
6689 /* Get index in virtual function table if it is a virtual member
6690 function. For older versions of GCC, this is an offset in the
6691 appropriate virtual table, as specified by DW_AT_containing_type.
6692 For everyone else, it is an expression to be evaluated relative
6693 to the object address. */
6695 attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
6698 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0)
6700 if (DW_BLOCK (attr)->data[0] == DW_OP_constu)
6702 /* Old-style GCC. */
6703 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
6705 else if (DW_BLOCK (attr)->data[0] == DW_OP_deref
6706 || (DW_BLOCK (attr)->size > 1
6707 && DW_BLOCK (attr)->data[0] == DW_OP_deref_size
6708 && DW_BLOCK (attr)->data[1] == cu->header.addr_size))
6710 struct dwarf_block blk;
6713 offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref
6715 blk.size = DW_BLOCK (attr)->size - offset;
6716 blk.data = DW_BLOCK (attr)->data + offset;
6717 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu);
6718 if ((fnp->voffset % cu->header.addr_size) != 0)
6719 dwarf2_complex_location_expr_complaint ();
6721 fnp->voffset /= cu->header.addr_size;
6725 dwarf2_complex_location_expr_complaint ();
6728 fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0));
6730 else if (attr_form_is_section_offset (attr))
6732 dwarf2_complex_location_expr_complaint ();
6736 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
6742 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
6743 if (attr && DW_UNSND (attr))
6745 /* GCC does this, as of 2008-08-25; PR debug/37237. */
6746 complaint (&symfile_complaints,
6747 _("Member function \"%s\" (offset %d) is virtual "
6748 "but the vtable offset is not specified"),
6749 fieldname, die->offset);
6750 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6751 TYPE_CPLUS_DYNAMIC (type) = 1;
6756 /* Create the vector of member function fields, and attach it to the type. */
6759 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
6760 struct dwarf2_cu *cu)
6762 struct fnfieldlist *flp;
6763 int total_length = 0;
6766 if (cu->language == language_ada)
6767 error (_("unexpected member functions in Ada type"));
6769 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6770 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
6771 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
6773 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
6775 struct nextfnfield *nfp = flp->head;
6776 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
6779 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
6780 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
6781 fn_flp->fn_fields = (struct fn_field *)
6782 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
6783 for (k = flp->length; (k--, nfp); nfp = nfp->next)
6784 fn_flp->fn_fields[k] = nfp->fnfield;
6786 total_length += flp->length;
6789 TYPE_NFN_FIELDS (type) = fip->nfnfields;
6790 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
6793 /* Returns non-zero if NAME is the name of a vtable member in CU's
6794 language, zero otherwise. */
6796 is_vtable_name (const char *name, struct dwarf2_cu *cu)
6798 static const char vptr[] = "_vptr";
6799 static const char vtable[] = "vtable";
6801 /* Look for the C++ and Java forms of the vtable. */
6802 if ((cu->language == language_java
6803 && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
6804 || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
6805 && is_cplus_marker (name[sizeof (vptr) - 1])))
6811 /* GCC outputs unnamed structures that are really pointers to member
6812 functions, with the ABI-specified layout. If TYPE describes
6813 such a structure, smash it into a member function type.
6815 GCC shouldn't do this; it should just output pointer to member DIEs.
6816 This is GCC PR debug/28767. */
6819 quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile)
6821 struct type *pfn_type, *domain_type, *new_type;
6823 /* Check for a structure with no name and two children. */
6824 if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2)
6827 /* Check for __pfn and __delta members. */
6828 if (TYPE_FIELD_NAME (type, 0) == NULL
6829 || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0
6830 || TYPE_FIELD_NAME (type, 1) == NULL
6831 || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0)
6834 /* Find the type of the method. */
6835 pfn_type = TYPE_FIELD_TYPE (type, 0);
6836 if (pfn_type == NULL
6837 || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
6838 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
6841 /* Look for the "this" argument. */
6842 pfn_type = TYPE_TARGET_TYPE (pfn_type);
6843 if (TYPE_NFIELDS (pfn_type) == 0
6844 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
6845 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
6848 domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
6849 new_type = alloc_type (objfile);
6850 smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type),
6851 TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
6852 TYPE_VARARGS (pfn_type));
6853 smash_to_methodptr_type (type, new_type);
6856 /* Called when we find the DIE that starts a structure or union scope
6857 (definition) to create a type for the structure or union. Fill in
6858 the type's name and general properties; the members will not be
6859 processed until process_structure_type.
6861 NOTE: we need to call these functions regardless of whether or not the
6862 DIE has a DW_AT_name attribute, since it might be an anonymous
6863 structure or union. This gets the type entered into our set of
6866 However, if the structure is incomplete (an opaque struct/union)
6867 then suppress creating a symbol table entry for it since gdb only
6868 wants to find the one with the complete definition. Note that if
6869 it is complete, we just call new_symbol, which does it's own
6870 checking about whether the struct/union is anonymous or not (and
6871 suppresses creating a symbol table entry itself). */
6873 static struct type *
6874 read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
6876 struct objfile *objfile = cu->objfile;
6878 struct attribute *attr;
6881 /* If the definition of this type lives in .debug_types, read that type.
6882 Don't follow DW_AT_specification though, that will take us back up
6883 the chain and we want to go down. */
6884 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
6887 struct dwarf2_cu *type_cu = cu;
6888 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
6890 /* We could just recurse on read_structure_type, but we need to call
6891 get_die_type to ensure only one type for this DIE is created.
6892 This is important, for example, because for c++ classes we need
6893 TYPE_NAME set which is only done by new_symbol. Blech. */
6894 type = read_type_die (type_die, type_cu);
6896 /* TYPE_CU may not be the same as CU.
6897 Ensure TYPE is recorded in CU's type_hash table. */
6898 return set_die_type (die, type, cu);
6901 type = alloc_type (objfile);
6902 INIT_CPLUS_SPECIFIC (type);
6904 name = dwarf2_name (die, cu);
6907 if (cu->language == language_cplus
6908 || cu->language == language_java)
6910 char *full_name = (char *) dwarf2_full_name (name, die, cu);
6912 /* dwarf2_full_name might have already finished building the DIE's
6913 type. If so, there is no need to continue. */
6914 if (get_die_type (die, cu) != NULL)
6915 return get_die_type (die, cu);
6917 TYPE_TAG_NAME (type) = full_name;
6918 if (die->tag == DW_TAG_structure_type
6919 || die->tag == DW_TAG_class_type)
6920 TYPE_NAME (type) = TYPE_TAG_NAME (type);
6924 /* The name is already allocated along with this objfile, so
6925 we don't need to duplicate it for the type. */
6926 TYPE_TAG_NAME (type) = (char *) name;
6927 if (die->tag == DW_TAG_class_type)
6928 TYPE_NAME (type) = TYPE_TAG_NAME (type);
6932 if (die->tag == DW_TAG_structure_type)
6934 TYPE_CODE (type) = TYPE_CODE_STRUCT;
6936 else if (die->tag == DW_TAG_union_type)
6938 TYPE_CODE (type) = TYPE_CODE_UNION;
6942 TYPE_CODE (type) = TYPE_CODE_CLASS;
6945 if (cu->language == language_cplus && die->tag == DW_TAG_class_type)
6946 TYPE_DECLARED_CLASS (type) = 1;
6948 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6951 TYPE_LENGTH (type) = DW_UNSND (attr);
6955 TYPE_LENGTH (type) = 0;
6958 TYPE_STUB_SUPPORTED (type) = 1;
6959 if (die_is_declaration (die, cu))
6960 TYPE_STUB (type) = 1;
6961 else if (attr == NULL && die->child == NULL
6962 && producer_is_realview (cu->producer))
6963 /* RealView does not output the required DW_AT_declaration
6964 on incomplete types. */
6965 TYPE_STUB (type) = 1;
6967 /* We need to add the type field to the die immediately so we don't
6968 infinitely recurse when dealing with pointers to the structure
6969 type within the structure itself. */
6970 set_die_type (die, type, cu);
6972 /* set_die_type should be already done. */
6973 set_descriptive_type (type, die, cu);
6978 /* Finish creating a structure or union type, including filling in
6979 its members and creating a symbol for it. */
6982 process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
6984 struct objfile *objfile = cu->objfile;
6985 struct die_info *child_die = die->child;
6988 type = get_die_type (die, cu);
6990 type = read_structure_type (die, cu);
6992 if (die->child != NULL && ! die_is_declaration (die, cu))
6994 struct field_info fi;
6995 struct die_info *child_die;
6996 VEC (symbolp) *template_args = NULL;
6997 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
6999 memset (&fi, 0, sizeof (struct field_info));
7001 child_die = die->child;
7003 while (child_die && child_die->tag)
7005 if (child_die->tag == DW_TAG_member
7006 || child_die->tag == DW_TAG_variable)
7008 /* NOTE: carlton/2002-11-05: A C++ static data member
7009 should be a DW_TAG_member that is a declaration, but
7010 all versions of G++ as of this writing (so through at
7011 least 3.2.1) incorrectly generate DW_TAG_variable
7012 tags for them instead. */
7013 dwarf2_add_field (&fi, child_die, cu);
7015 else if (child_die->tag == DW_TAG_subprogram)
7017 /* C++ member function. */
7018 dwarf2_add_member_fn (&fi, child_die, type, cu);
7020 else if (child_die->tag == DW_TAG_inheritance)
7022 /* C++ base class field. */
7023 dwarf2_add_field (&fi, child_die, cu);
7025 else if (child_die->tag == DW_TAG_typedef)
7026 dwarf2_add_typedef (&fi, child_die, cu);
7027 else if (child_die->tag == DW_TAG_template_type_param
7028 || child_die->tag == DW_TAG_template_value_param)
7030 struct symbol *arg = new_symbol (child_die, NULL, cu);
7033 VEC_safe_push (symbolp, template_args, arg);
7036 child_die = sibling_die (child_die);
7039 /* Attach template arguments to type. */
7040 if (! VEC_empty (symbolp, template_args))
7042 ALLOCATE_CPLUS_STRUCT_TYPE (type);
7043 TYPE_N_TEMPLATE_ARGUMENTS (type)
7044 = VEC_length (symbolp, template_args);
7045 TYPE_TEMPLATE_ARGUMENTS (type)
7046 = obstack_alloc (&objfile->objfile_obstack,
7047 (TYPE_N_TEMPLATE_ARGUMENTS (type)
7048 * sizeof (struct symbol *)));
7049 memcpy (TYPE_TEMPLATE_ARGUMENTS (type),
7050 VEC_address (symbolp, template_args),
7051 (TYPE_N_TEMPLATE_ARGUMENTS (type)
7052 * sizeof (struct symbol *)));
7053 VEC_free (symbolp, template_args);
7056 /* Attach fields and member functions to the type. */
7058 dwarf2_attach_fields_to_type (&fi, type, cu);
7061 dwarf2_attach_fn_fields_to_type (&fi, type, cu);
7063 /* Get the type which refers to the base class (possibly this
7064 class itself) which contains the vtable pointer for the current
7065 class from the DW_AT_containing_type attribute. This use of
7066 DW_AT_containing_type is a GNU extension. */
7068 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
7070 struct type *t = die_containing_type (die, cu);
7072 TYPE_VPTR_BASETYPE (type) = t;
7077 /* Our own class provides vtbl ptr. */
7078 for (i = TYPE_NFIELDS (t) - 1;
7079 i >= TYPE_N_BASECLASSES (t);
7082 char *fieldname = TYPE_FIELD_NAME (t, i);
7084 if (is_vtable_name (fieldname, cu))
7086 TYPE_VPTR_FIELDNO (type) = i;
7091 /* Complain if virtual function table field not found. */
7092 if (i < TYPE_N_BASECLASSES (t))
7093 complaint (&symfile_complaints,
7094 _("virtual function table pointer "
7095 "not found when defining class '%s'"),
7096 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
7101 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
7104 else if (cu->producer
7105 && strncmp (cu->producer,
7106 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
7108 /* The IBM XLC compiler does not provide direct indication
7109 of the containing type, but the vtable pointer is
7110 always named __vfp. */
7114 for (i = TYPE_NFIELDS (type) - 1;
7115 i >= TYPE_N_BASECLASSES (type);
7118 if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
7120 TYPE_VPTR_FIELDNO (type) = i;
7121 TYPE_VPTR_BASETYPE (type) = type;
7128 /* Copy fi.typedef_field_list linked list elements content into the
7129 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
7130 if (fi.typedef_field_list)
7132 int i = fi.typedef_field_list_count;
7134 ALLOCATE_CPLUS_STRUCT_TYPE (type);
7135 TYPE_TYPEDEF_FIELD_ARRAY (type)
7136 = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i);
7137 TYPE_TYPEDEF_FIELD_COUNT (type) = i;
7139 /* Reverse the list order to keep the debug info elements order. */
7142 struct typedef_field *dest, *src;
7144 dest = &TYPE_TYPEDEF_FIELD (type, i);
7145 src = &fi.typedef_field_list->field;
7146 fi.typedef_field_list = fi.typedef_field_list->next;
7151 do_cleanups (back_to);
7154 quirk_gcc_member_function_pointer (type, cu->objfile);
7156 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
7157 snapshots) has been known to create a die giving a declaration
7158 for a class that has, as a child, a die giving a definition for a
7159 nested class. So we have to process our children even if the
7160 current die is a declaration. Normally, of course, a declaration
7161 won't have any children at all. */
7163 while (child_die != NULL && child_die->tag)
7165 if (child_die->tag == DW_TAG_member
7166 || child_die->tag == DW_TAG_variable
7167 || child_die->tag == DW_TAG_inheritance
7168 || child_die->tag == DW_TAG_template_value_param
7169 || child_die->tag == DW_TAG_template_type_param)
7174 process_die (child_die, cu);
7176 child_die = sibling_die (child_die);
7179 /* Do not consider external references. According to the DWARF standard,
7180 these DIEs are identified by the fact that they have no byte_size
7181 attribute, and a declaration attribute. */
7182 if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
7183 || !die_is_declaration (die, cu))
7184 new_symbol (die, type, cu);
7187 /* Given a DW_AT_enumeration_type die, set its type. We do not
7188 complete the type's fields yet, or create any symbols. */
7190 static struct type *
7191 read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
7193 struct objfile *objfile = cu->objfile;
7195 struct attribute *attr;
7198 /* If the definition of this type lives in .debug_types, read that type.
7199 Don't follow DW_AT_specification though, that will take us back up
7200 the chain and we want to go down. */
7201 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
7204 struct dwarf2_cu *type_cu = cu;
7205 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
7207 type = read_type_die (type_die, type_cu);
7209 /* TYPE_CU may not be the same as CU.
7210 Ensure TYPE is recorded in CU's type_hash table. */
7211 return set_die_type (die, type, cu);
7214 type = alloc_type (objfile);
7216 TYPE_CODE (type) = TYPE_CODE_ENUM;
7217 name = dwarf2_full_name (NULL, die, cu);
7219 TYPE_TAG_NAME (type) = (char *) name;
7221 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7224 TYPE_LENGTH (type) = DW_UNSND (attr);
7228 TYPE_LENGTH (type) = 0;
7231 /* The enumeration DIE can be incomplete. In Ada, any type can be
7232 declared as private in the package spec, and then defined only
7233 inside the package body. Such types are known as Taft Amendment
7234 Types. When another package uses such a type, an incomplete DIE
7235 may be generated by the compiler. */
7236 if (die_is_declaration (die, cu))
7237 TYPE_STUB (type) = 1;
7239 return set_die_type (die, type, cu);
7242 /* Given a pointer to a die which begins an enumeration, process all
7243 the dies that define the members of the enumeration, and create the
7244 symbol for the enumeration type.
7246 NOTE: We reverse the order of the element list. */
7249 process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
7251 struct type *this_type;
7253 this_type = get_die_type (die, cu);
7254 if (this_type == NULL)
7255 this_type = read_enumeration_type (die, cu);
7257 if (die->child != NULL)
7259 struct die_info *child_die;
7261 struct field *fields = NULL;
7263 int unsigned_enum = 1;
7266 child_die = die->child;
7267 while (child_die && child_die->tag)
7269 if (child_die->tag != DW_TAG_enumerator)
7271 process_die (child_die, cu);
7275 name = dwarf2_name (child_die, cu);
7278 sym = new_symbol (child_die, this_type, cu);
7279 if (SYMBOL_VALUE (sym) < 0)
7282 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
7284 fields = (struct field *)
7286 (num_fields + DW_FIELD_ALLOC_CHUNK)
7287 * sizeof (struct field));
7290 FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym);
7291 FIELD_TYPE (fields[num_fields]) = NULL;
7292 SET_FIELD_BITPOS (fields[num_fields], SYMBOL_VALUE (sym));
7293 FIELD_BITSIZE (fields[num_fields]) = 0;
7299 child_die = sibling_die (child_die);
7304 TYPE_NFIELDS (this_type) = num_fields;
7305 TYPE_FIELDS (this_type) = (struct field *)
7306 TYPE_ALLOC (this_type, sizeof (struct field) * num_fields);
7307 memcpy (TYPE_FIELDS (this_type), fields,
7308 sizeof (struct field) * num_fields);
7312 TYPE_UNSIGNED (this_type) = 1;
7315 new_symbol (die, this_type, cu);
7318 /* Extract all information from a DW_TAG_array_type DIE and put it in
7319 the DIE's type field. For now, this only handles one dimensional
7322 static struct type *
7323 read_array_type (struct die_info *die, struct dwarf2_cu *cu)
7325 struct objfile *objfile = cu->objfile;
7326 struct die_info *child_die;
7328 struct type *element_type, *range_type, *index_type;
7329 struct type **range_types = NULL;
7330 struct attribute *attr;
7332 struct cleanup *back_to;
7335 element_type = die_type (die, cu);
7337 /* The die_type call above may have already set the type for this DIE. */
7338 type = get_die_type (die, cu);
7342 /* Irix 6.2 native cc creates array types without children for
7343 arrays with unspecified length. */
7344 if (die->child == NULL)
7346 index_type = objfile_type (objfile)->builtin_int;
7347 range_type = create_range_type (NULL, index_type, 0, -1);
7348 type = create_array_type (NULL, element_type, range_type);
7349 return set_die_type (die, type, cu);
7352 back_to = make_cleanup (null_cleanup, NULL);
7353 child_die = die->child;
7354 while (child_die && child_die->tag)
7356 if (child_die->tag == DW_TAG_subrange_type)
7358 struct type *child_type = read_type_die (child_die, cu);
7360 if (child_type != NULL)
7362 /* The range type was succesfully read. Save it for the
7363 array type creation. */
7364 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
7366 range_types = (struct type **)
7367 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
7368 * sizeof (struct type *));
7370 make_cleanup (free_current_contents, &range_types);
7372 range_types[ndim++] = child_type;
7375 child_die = sibling_die (child_die);
7378 /* Dwarf2 dimensions are output from left to right, create the
7379 necessary array types in backwards order. */
7381 type = element_type;
7383 if (read_array_order (die, cu) == DW_ORD_col_major)
7388 type = create_array_type (NULL, type, range_types[i++]);
7393 type = create_array_type (NULL, type, range_types[ndim]);
7396 /* Understand Dwarf2 support for vector types (like they occur on
7397 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
7398 array type. This is not part of the Dwarf2/3 standard yet, but a
7399 custom vendor extension. The main difference between a regular
7400 array and the vector variant is that vectors are passed by value
7402 attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
7404 make_vector_type (type);
7406 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
7407 implementation may choose to implement triple vectors using this
7409 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7412 if (DW_UNSND (attr) >= TYPE_LENGTH (type))
7413 TYPE_LENGTH (type) = DW_UNSND (attr);
7415 complaint (&symfile_complaints,
7416 _("DW_AT_byte_size for array type smaller "
7417 "than the total size of elements"));
7420 name = dwarf2_name (die, cu);
7422 TYPE_NAME (type) = name;
7424 /* Install the type in the die. */
7425 set_die_type (die, type, cu);
7427 /* set_die_type should be already done. */
7428 set_descriptive_type (type, die, cu);
7430 do_cleanups (back_to);
7435 static enum dwarf_array_dim_ordering
7436 read_array_order (struct die_info *die, struct dwarf2_cu *cu)
7438 struct attribute *attr;
7440 attr = dwarf2_attr (die, DW_AT_ordering, cu);
7442 if (attr) return DW_SND (attr);
7444 /* GNU F77 is a special case, as at 08/2004 array type info is the
7445 opposite order to the dwarf2 specification, but data is still
7446 laid out as per normal fortran.
7448 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
7449 version checking. */
7451 if (cu->language == language_fortran
7452 && cu->producer && strstr (cu->producer, "GNU F77"))
7454 return DW_ORD_row_major;
7457 switch (cu->language_defn->la_array_ordering)
7459 case array_column_major:
7460 return DW_ORD_col_major;
7461 case array_row_major:
7463 return DW_ORD_row_major;
7467 /* Extract all information from a DW_TAG_set_type DIE and put it in
7468 the DIE's type field. */
7470 static struct type *
7471 read_set_type (struct die_info *die, struct dwarf2_cu *cu)
7473 struct type *domain_type, *set_type;
7474 struct attribute *attr;
7476 domain_type = die_type (die, cu);
7478 /* The die_type call above may have already set the type for this DIE. */
7479 set_type = get_die_type (die, cu);
7483 set_type = create_set_type (NULL, domain_type);
7485 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7487 TYPE_LENGTH (set_type) = DW_UNSND (attr);
7489 return set_die_type (die, set_type, cu);
7492 /* First cut: install each common block member as a global variable. */
7495 read_common_block (struct die_info *die, struct dwarf2_cu *cu)
7497 struct die_info *child_die;
7498 struct attribute *attr;
7500 CORE_ADDR base = (CORE_ADDR) 0;
7502 attr = dwarf2_attr (die, DW_AT_location, cu);
7505 /* Support the .debug_loc offsets. */
7506 if (attr_form_is_block (attr))
7508 base = decode_locdesc (DW_BLOCK (attr), cu);
7510 else if (attr_form_is_section_offset (attr))
7512 dwarf2_complex_location_expr_complaint ();
7516 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
7517 "common block member");
7520 if (die->child != NULL)
7522 child_die = die->child;
7523 while (child_die && child_die->tag)
7525 sym = new_symbol (child_die, NULL, cu);
7526 attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu);
7527 if (sym != NULL && attr != NULL)
7529 CORE_ADDR byte_offset = 0;
7531 if (attr_form_is_section_offset (attr))
7532 dwarf2_complex_location_expr_complaint ();
7533 else if (attr_form_is_constant (attr))
7534 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
7535 else if (attr_form_is_block (attr))
7536 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
7538 dwarf2_complex_location_expr_complaint ();
7540 SYMBOL_VALUE_ADDRESS (sym) = base + byte_offset;
7541 add_symbol_to_list (sym, &global_symbols);
7543 child_die = sibling_die (child_die);
7548 /* Create a type for a C++ namespace. */
7550 static struct type *
7551 read_namespace_type (struct die_info *die, struct dwarf2_cu *cu)
7553 struct objfile *objfile = cu->objfile;
7554 const char *previous_prefix, *name;
7558 /* For extensions, reuse the type of the original namespace. */
7559 if (dwarf2_attr (die, DW_AT_extension, cu) != NULL)
7561 struct die_info *ext_die;
7562 struct dwarf2_cu *ext_cu = cu;
7564 ext_die = dwarf2_extension (die, &ext_cu);
7565 type = read_type_die (ext_die, ext_cu);
7567 /* EXT_CU may not be the same as CU.
7568 Ensure TYPE is recorded in CU's type_hash table. */
7569 return set_die_type (die, type, cu);
7572 name = namespace_name (die, &is_anonymous, cu);
7574 /* Now build the name of the current namespace. */
7576 previous_prefix = determine_prefix (die, cu);
7577 if (previous_prefix[0] != '\0')
7578 name = typename_concat (&objfile->objfile_obstack,
7579 previous_prefix, name, 0, cu);
7581 /* Create the type. */
7582 type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL,
7584 TYPE_NAME (type) = (char *) name;
7585 TYPE_TAG_NAME (type) = TYPE_NAME (type);
7587 return set_die_type (die, type, cu);
7590 /* Read a C++ namespace. */
7593 read_namespace (struct die_info *die, struct dwarf2_cu *cu)
7595 struct objfile *objfile = cu->objfile;
7598 /* Add a symbol associated to this if we haven't seen the namespace
7599 before. Also, add a using directive if it's an anonymous
7602 if (dwarf2_attr (die, DW_AT_extension, cu) == NULL)
7606 type = read_type_die (die, cu);
7607 new_symbol (die, type, cu);
7609 namespace_name (die, &is_anonymous, cu);
7612 const char *previous_prefix = determine_prefix (die, cu);
7614 cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL,
7615 NULL, &objfile->objfile_obstack);
7619 if (die->child != NULL)
7621 struct die_info *child_die = die->child;
7623 while (child_die && child_die->tag)
7625 process_die (child_die, cu);
7626 child_die = sibling_die (child_die);
7631 /* Read a Fortran module as type. This DIE can be only a declaration used for
7632 imported module. Still we need that type as local Fortran "use ... only"
7633 declaration imports depend on the created type in determine_prefix. */
7635 static struct type *
7636 read_module_type (struct die_info *die, struct dwarf2_cu *cu)
7638 struct objfile *objfile = cu->objfile;
7642 module_name = dwarf2_name (die, cu);
7644 complaint (&symfile_complaints,
7645 _("DW_TAG_module has no name, offset 0x%x"),
7647 type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile);
7649 /* determine_prefix uses TYPE_TAG_NAME. */
7650 TYPE_TAG_NAME (type) = TYPE_NAME (type);
7652 return set_die_type (die, type, cu);
7655 /* Read a Fortran module. */
7658 read_module (struct die_info *die, struct dwarf2_cu *cu)
7660 struct die_info *child_die = die->child;
7662 while (child_die && child_die->tag)
7664 process_die (child_die, cu);
7665 child_die = sibling_die (child_die);
7669 /* Return the name of the namespace represented by DIE. Set
7670 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
7674 namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
7676 struct die_info *current_die;
7677 const char *name = NULL;
7679 /* Loop through the extensions until we find a name. */
7681 for (current_die = die;
7682 current_die != NULL;
7683 current_die = dwarf2_extension (die, &cu))
7685 name = dwarf2_name (current_die, cu);
7690 /* Is it an anonymous namespace? */
7692 *is_anonymous = (name == NULL);
7694 name = "(anonymous namespace)";
7699 /* Extract all information from a DW_TAG_pointer_type DIE and add to
7700 the user defined type vector. */
7702 static struct type *
7703 read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
7705 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
7706 struct comp_unit_head *cu_header = &cu->header;
7708 struct attribute *attr_byte_size;
7709 struct attribute *attr_address_class;
7710 int byte_size, addr_class;
7711 struct type *target_type;
7713 target_type = die_type (die, cu);
7715 /* The die_type call above may have already set the type for this DIE. */
7716 type = get_die_type (die, cu);
7720 type = lookup_pointer_type (target_type);
7722 attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
7724 byte_size = DW_UNSND (attr_byte_size);
7726 byte_size = cu_header->addr_size;
7728 attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
7729 if (attr_address_class)
7730 addr_class = DW_UNSND (attr_address_class);
7732 addr_class = DW_ADDR_none;
7734 /* If the pointer size or address class is different than the
7735 default, create a type variant marked as such and set the
7736 length accordingly. */
7737 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
7739 if (gdbarch_address_class_type_flags_p (gdbarch))
7743 type_flags = gdbarch_address_class_type_flags
7744 (gdbarch, byte_size, addr_class);
7745 gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
7747 type = make_type_with_address_space (type, type_flags);
7749 else if (TYPE_LENGTH (type) != byte_size)
7751 complaint (&symfile_complaints,
7752 _("invalid pointer size %d"), byte_size);
7756 /* Should we also complain about unhandled address classes? */
7760 TYPE_LENGTH (type) = byte_size;
7761 return set_die_type (die, type, cu);
7764 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
7765 the user defined type vector. */
7767 static struct type *
7768 read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
7771 struct type *to_type;
7772 struct type *domain;
7774 to_type = die_type (die, cu);
7775 domain = die_containing_type (die, cu);
7777 /* The calls above may have already set the type for this DIE. */
7778 type = get_die_type (die, cu);
7782 if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
7783 type = lookup_methodptr_type (to_type);
7785 type = lookup_memberptr_type (to_type, domain);
7787 return set_die_type (die, type, cu);
7790 /* Extract all information from a DW_TAG_reference_type DIE and add to
7791 the user defined type vector. */
7793 static struct type *
7794 read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
7796 struct comp_unit_head *cu_header = &cu->header;
7797 struct type *type, *target_type;
7798 struct attribute *attr;
7800 target_type = die_type (die, cu);
7802 /* The die_type call above may have already set the type for this DIE. */
7803 type = get_die_type (die, cu);
7807 type = lookup_reference_type (target_type);
7808 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7811 TYPE_LENGTH (type) = DW_UNSND (attr);
7815 TYPE_LENGTH (type) = cu_header->addr_size;
7817 return set_die_type (die, type, cu);
7820 static struct type *
7821 read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
7823 struct type *base_type, *cv_type;
7825 base_type = die_type (die, cu);
7827 /* The die_type call above may have already set the type for this DIE. */
7828 cv_type = get_die_type (die, cu);
7832 /* In case the const qualifier is applied to an array type, the element type
7833 is so qualified, not the array type (section 6.7.3 of C99). */
7834 if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY)
7836 struct type *el_type, *inner_array;
7838 base_type = copy_type (base_type);
7839 inner_array = base_type;
7841 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY)
7843 TYPE_TARGET_TYPE (inner_array) =
7844 copy_type (TYPE_TARGET_TYPE (inner_array));
7845 inner_array = TYPE_TARGET_TYPE (inner_array);
7848 el_type = TYPE_TARGET_TYPE (inner_array);
7849 TYPE_TARGET_TYPE (inner_array) =
7850 make_cv_type (1, TYPE_VOLATILE (el_type), el_type, NULL);
7852 return set_die_type (die, base_type, cu);
7855 cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
7856 return set_die_type (die, cv_type, cu);
7859 static struct type *
7860 read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
7862 struct type *base_type, *cv_type;
7864 base_type = die_type (die, cu);
7866 /* The die_type call above may have already set the type for this DIE. */
7867 cv_type = get_die_type (die, cu);
7871 cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
7872 return set_die_type (die, cv_type, cu);
7875 /* Extract all information from a DW_TAG_string_type DIE and add to
7876 the user defined type vector. It isn't really a user defined type,
7877 but it behaves like one, with other DIE's using an AT_user_def_type
7878 attribute to reference it. */
7880 static struct type *
7881 read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
7883 struct objfile *objfile = cu->objfile;
7884 struct gdbarch *gdbarch = get_objfile_arch (objfile);
7885 struct type *type, *range_type, *index_type, *char_type;
7886 struct attribute *attr;
7887 unsigned int length;
7889 attr = dwarf2_attr (die, DW_AT_string_length, cu);
7892 length = DW_UNSND (attr);
7896 /* Check for the DW_AT_byte_size attribute. */
7897 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7900 length = DW_UNSND (attr);
7908 index_type = objfile_type (objfile)->builtin_int;
7909 range_type = create_range_type (NULL, index_type, 1, length);
7910 char_type = language_string_char_type (cu->language_defn, gdbarch);
7911 type = create_string_type (NULL, char_type, range_type);
7913 return set_die_type (die, type, cu);
7916 /* Handle DIES due to C code like:
7920 int (*funcp)(int a, long l);
7924 ('funcp' generates a DW_TAG_subroutine_type DIE). */
7926 static struct type *
7927 read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
7929 struct type *type; /* Type that this function returns. */
7930 struct type *ftype; /* Function that returns above type. */
7931 struct attribute *attr;
7933 type = die_type (die, cu);
7935 /* The die_type call above may have already set the type for this DIE. */
7936 ftype = get_die_type (die, cu);
7940 ftype = lookup_function_type (type);
7942 /* All functions in C++, Pascal and Java have prototypes. */
7943 attr = dwarf2_attr (die, DW_AT_prototyped, cu);
7944 if ((attr && (DW_UNSND (attr) != 0))
7945 || cu->language == language_cplus
7946 || cu->language == language_java
7947 || cu->language == language_pascal)
7948 TYPE_PROTOTYPED (ftype) = 1;
7949 else if (producer_is_realview (cu->producer))
7950 /* RealView does not emit DW_AT_prototyped. We can not
7951 distinguish prototyped and unprototyped functions; default to
7952 prototyped, since that is more common in modern code (and
7953 RealView warns about unprototyped functions). */
7954 TYPE_PROTOTYPED (ftype) = 1;
7956 /* Store the calling convention in the type if it's available in
7957 the subroutine die. Otherwise set the calling convention to
7958 the default value DW_CC_normal. */
7959 attr = dwarf2_attr (die, DW_AT_calling_convention, cu);
7961 TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr);
7962 else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL"))
7963 TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL;
7965 TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal;
7967 /* We need to add the subroutine type to the die immediately so
7968 we don't infinitely recurse when dealing with parameters
7969 declared as the same subroutine type. */
7970 set_die_type (die, ftype, cu);
7972 if (die->child != NULL)
7974 struct type *void_type = objfile_type (cu->objfile)->builtin_void;
7975 struct die_info *child_die;
7976 int nparams, iparams;
7978 /* Count the number of parameters.
7979 FIXME: GDB currently ignores vararg functions, but knows about
7980 vararg member functions. */
7982 child_die = die->child;
7983 while (child_die && child_die->tag)
7985 if (child_die->tag == DW_TAG_formal_parameter)
7987 else if (child_die->tag == DW_TAG_unspecified_parameters)
7988 TYPE_VARARGS (ftype) = 1;
7989 child_die = sibling_die (child_die);
7992 /* Allocate storage for parameters and fill them in. */
7993 TYPE_NFIELDS (ftype) = nparams;
7994 TYPE_FIELDS (ftype) = (struct field *)
7995 TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
7997 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
7998 even if we error out during the parameters reading below. */
7999 for (iparams = 0; iparams < nparams; iparams++)
8000 TYPE_FIELD_TYPE (ftype, iparams) = void_type;
8003 child_die = die->child;
8004 while (child_die && child_die->tag)
8006 if (child_die->tag == DW_TAG_formal_parameter)
8008 struct type *arg_type;
8010 /* DWARF version 2 has no clean way to discern C++
8011 static and non-static member functions. G++ helps
8012 GDB by marking the first parameter for non-static
8013 member functions (which is the this pointer) as
8014 artificial. We pass this information to
8015 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
8017 DWARF version 3 added DW_AT_object_pointer, which GCC
8018 4.5 does not yet generate. */
8019 attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
8021 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
8024 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
8026 /* GCC/43521: In java, the formal parameter
8027 "this" is sometimes not marked with DW_AT_artificial. */
8028 if (cu->language == language_java)
8030 const char *name = dwarf2_name (child_die, cu);
8032 if (name && !strcmp (name, "this"))
8033 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1;
8036 arg_type = die_type (child_die, cu);
8038 /* RealView does not mark THIS as const, which the testsuite
8039 expects. GCC marks THIS as const in method definitions,
8040 but not in the class specifications (GCC PR 43053). */
8041 if (cu->language == language_cplus && !TYPE_CONST (arg_type)
8042 && TYPE_FIELD_ARTIFICIAL (ftype, iparams))
8045 struct dwarf2_cu *arg_cu = cu;
8046 const char *name = dwarf2_name (child_die, cu);
8048 attr = dwarf2_attr (die, DW_AT_object_pointer, cu);
8051 /* If the compiler emits this, use it. */
8052 if (follow_die_ref (die, attr, &arg_cu) == child_die)
8055 else if (name && strcmp (name, "this") == 0)
8056 /* Function definitions will have the argument names. */
8058 else if (name == NULL && iparams == 0)
8059 /* Declarations may not have the names, so like
8060 elsewhere in GDB, assume an artificial first
8061 argument is "this". */
8065 arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type),
8069 TYPE_FIELD_TYPE (ftype, iparams) = arg_type;
8072 child_die = sibling_die (child_die);
8079 static struct type *
8080 read_typedef (struct die_info *die, struct dwarf2_cu *cu)
8082 struct objfile *objfile = cu->objfile;
8083 const char *name = NULL;
8084 struct type *this_type;
8086 name = dwarf2_full_name (NULL, die, cu);
8087 this_type = init_type (TYPE_CODE_TYPEDEF, 0,
8088 TYPE_FLAG_TARGET_STUB, NULL, objfile);
8089 TYPE_NAME (this_type) = (char *) name;
8090 set_die_type (die, this_type, cu);
8091 TYPE_TARGET_TYPE (this_type) = die_type (die, cu);
8095 /* Find a representation of a given base type and install
8096 it in the TYPE field of the die. */
8098 static struct type *
8099 read_base_type (struct die_info *die, struct dwarf2_cu *cu)
8101 struct objfile *objfile = cu->objfile;
8103 struct attribute *attr;
8104 int encoding = 0, size = 0;
8106 enum type_code code = TYPE_CODE_INT;
8108 struct type *target_type = NULL;
8110 attr = dwarf2_attr (die, DW_AT_encoding, cu);
8113 encoding = DW_UNSND (attr);
8115 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
8118 size = DW_UNSND (attr);
8120 name = dwarf2_name (die, cu);
8123 complaint (&symfile_complaints,
8124 _("DW_AT_name missing from DW_TAG_base_type"));
8129 case DW_ATE_address:
8130 /* Turn DW_ATE_address into a void * pointer. */
8131 code = TYPE_CODE_PTR;
8132 type_flags |= TYPE_FLAG_UNSIGNED;
8133 target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
8135 case DW_ATE_boolean:
8136 code = TYPE_CODE_BOOL;
8137 type_flags |= TYPE_FLAG_UNSIGNED;
8139 case DW_ATE_complex_float:
8140 code = TYPE_CODE_COMPLEX;
8141 target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
8143 case DW_ATE_decimal_float:
8144 code = TYPE_CODE_DECFLOAT;
8147 code = TYPE_CODE_FLT;
8151 case DW_ATE_unsigned:
8152 type_flags |= TYPE_FLAG_UNSIGNED;
8154 case DW_ATE_signed_char:
8155 if (cu->language == language_ada || cu->language == language_m2
8156 || cu->language == language_pascal)
8157 code = TYPE_CODE_CHAR;
8159 case DW_ATE_unsigned_char:
8160 if (cu->language == language_ada || cu->language == language_m2
8161 || cu->language == language_pascal)
8162 code = TYPE_CODE_CHAR;
8163 type_flags |= TYPE_FLAG_UNSIGNED;
8166 /* We just treat this as an integer and then recognize the
8167 type by name elsewhere. */
8171 complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
8172 dwarf_type_encoding_name (encoding));
8176 type = init_type (code, size, type_flags, NULL, objfile);
8177 TYPE_NAME (type) = name;
8178 TYPE_TARGET_TYPE (type) = target_type;
8180 if (name && strcmp (name, "char") == 0)
8181 TYPE_NOSIGN (type) = 1;
8183 return set_die_type (die, type, cu);
8186 /* Read the given DW_AT_subrange DIE. */
8188 static struct type *
8189 read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
8191 struct type *base_type;
8192 struct type *range_type;
8193 struct attribute *attr;
8197 LONGEST negative_mask;
8199 base_type = die_type (die, cu);
8200 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
8201 check_typedef (base_type);
8203 /* The die_type call above may have already set the type for this DIE. */
8204 range_type = get_die_type (die, cu);
8208 if (cu->language == language_fortran)
8210 /* FORTRAN implies a lower bound of 1, if not given. */
8214 /* FIXME: For variable sized arrays either of these could be
8215 a variable rather than a constant value. We'll allow it,
8216 but we don't know how to handle it. */
8217 attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
8219 low = dwarf2_get_attr_constant_value (attr, 0);
8221 attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
8224 if (attr->form == DW_FORM_block1 || is_ref_attr (attr))
8226 /* GCC encodes arrays with unspecified or dynamic length
8227 with a DW_FORM_block1 attribute or a reference attribute.
8228 FIXME: GDB does not yet know how to handle dynamic
8229 arrays properly, treat them as arrays with unspecified
8232 FIXME: jimb/2003-09-22: GDB does not really know
8233 how to handle arrays of unspecified length
8234 either; we just represent them as zero-length
8235 arrays. Choose an appropriate upper bound given
8236 the lower bound we've computed above. */
8240 high = dwarf2_get_attr_constant_value (attr, 1);
8244 attr = dwarf2_attr (die, DW_AT_count, cu);
8247 int count = dwarf2_get_attr_constant_value (attr, 1);
8248 high = low + count - 1;
8252 /* Unspecified array length. */
8257 /* Dwarf-2 specifications explicitly allows to create subrange types
8258 without specifying a base type.
8259 In that case, the base type must be set to the type of
8260 the lower bound, upper bound or count, in that order, if any of these
8261 three attributes references an object that has a type.
8262 If no base type is found, the Dwarf-2 specifications say that
8263 a signed integer type of size equal to the size of an address should
8265 For the following C code: `extern char gdb_int [];'
8266 GCC produces an empty range DIE.
8267 FIXME: muller/2010-05-28: Possible references to object for low bound,
8268 high bound or count are not yet handled by this code. */
8269 if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
8271 struct objfile *objfile = cu->objfile;
8272 struct gdbarch *gdbarch = get_objfile_arch (objfile);
8273 int addr_size = gdbarch_addr_bit (gdbarch) /8;
8274 struct type *int_type = objfile_type (objfile)->builtin_int;
8276 /* Test "int", "long int", and "long long int" objfile types,
8277 and select the first one having a size above or equal to the
8278 architecture address size. */
8279 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
8280 base_type = int_type;
8283 int_type = objfile_type (objfile)->builtin_long;
8284 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
8285 base_type = int_type;
8288 int_type = objfile_type (objfile)->builtin_long_long;
8289 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
8290 base_type = int_type;
8296 (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1);
8297 if (!TYPE_UNSIGNED (base_type) && (low & negative_mask))
8298 low |= negative_mask;
8299 if (!TYPE_UNSIGNED (base_type) && (high & negative_mask))
8300 high |= negative_mask;
8302 range_type = create_range_type (NULL, base_type, low, high);
8304 /* Mark arrays with dynamic length at least as an array of unspecified
8305 length. GDB could check the boundary but before it gets implemented at
8306 least allow accessing the array elements. */
8307 if (attr && attr->form == DW_FORM_block1)
8308 TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1;
8310 /* Ada expects an empty array on no boundary attributes. */
8311 if (attr == NULL && cu->language != language_ada)
8312 TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1;
8314 name = dwarf2_name (die, cu);
8316 TYPE_NAME (range_type) = name;
8318 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
8320 TYPE_LENGTH (range_type) = DW_UNSND (attr);
8322 set_die_type (die, range_type, cu);
8324 /* set_die_type should be already done. */
8325 set_descriptive_type (range_type, die, cu);
8330 static struct type *
8331 read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
8335 /* For now, we only support the C meaning of an unspecified type: void. */
8337 type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile);
8338 TYPE_NAME (type) = dwarf2_name (die, cu);
8340 return set_die_type (die, type, cu);
8343 /* Trivial hash function for die_info: the hash value of a DIE
8344 is its offset in .debug_info for this objfile. */
8347 die_hash (const void *item)
8349 const struct die_info *die = item;
8354 /* Trivial comparison function for die_info structures: two DIEs
8355 are equal if they have the same offset. */
8358 die_eq (const void *item_lhs, const void *item_rhs)
8360 const struct die_info *die_lhs = item_lhs;
8361 const struct die_info *die_rhs = item_rhs;
8363 return die_lhs->offset == die_rhs->offset;
8366 /* Read a whole compilation unit into a linked list of dies. */
8368 static struct die_info *
8369 read_comp_unit (gdb_byte *info_ptr, struct dwarf2_cu *cu)
8371 struct die_reader_specs reader_specs;
8372 int read_abbrevs = 0;
8373 struct cleanup *back_to = NULL;
8374 struct die_info *die;
8376 if (cu->dwarf2_abbrevs == NULL)
8378 dwarf2_read_abbrevs (cu->objfile->obfd, cu);
8379 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
8383 gdb_assert (cu->die_hash == NULL);
8385 = htab_create_alloc_ex (cu->header.length / 12,
8389 &cu->comp_unit_obstack,
8390 hashtab_obstack_allocate,
8391 dummy_obstack_deallocate);
8393 init_cu_die_reader (&reader_specs, cu);
8395 die = read_die_and_children (&reader_specs, info_ptr, &info_ptr, NULL);
8398 do_cleanups (back_to);
8403 /* Main entry point for reading a DIE and all children.
8404 Read the DIE and dump it if requested. */
8406 static struct die_info *
8407 read_die_and_children (const struct die_reader_specs *reader,
8409 gdb_byte **new_info_ptr,
8410 struct die_info *parent)
8412 struct die_info *result = read_die_and_children_1 (reader, info_ptr,
8413 new_info_ptr, parent);
8415 if (dwarf2_die_debug)
8417 fprintf_unfiltered (gdb_stdlog,
8418 "\nRead die from %s of %s:\n",
8419 reader->buffer == dwarf2_per_objfile->info.buffer
8421 : reader->buffer == dwarf2_per_objfile->types.buffer
8423 : "unknown section",
8424 reader->abfd->filename);
8425 dump_die (result, dwarf2_die_debug);
8431 /* Read a single die and all its descendents. Set the die's sibling
8432 field to NULL; set other fields in the die correctly, and set all
8433 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
8434 location of the info_ptr after reading all of those dies. PARENT
8435 is the parent of the die in question. */
8437 static struct die_info *
8438 read_die_and_children_1 (const struct die_reader_specs *reader,
8440 gdb_byte **new_info_ptr,
8441 struct die_info *parent)
8443 struct die_info *die;
8447 cur_ptr = read_full_die (reader, &die, info_ptr, &has_children);
8450 *new_info_ptr = cur_ptr;
8453 store_in_ref_table (die, reader->cu);
8456 die->child = read_die_and_siblings (reader, cur_ptr, new_info_ptr, die);
8460 *new_info_ptr = cur_ptr;
8463 die->sibling = NULL;
8464 die->parent = parent;
8468 /* Read a die, all of its descendents, and all of its siblings; set
8469 all of the fields of all of the dies correctly. Arguments are as
8470 in read_die_and_children. */
8472 static struct die_info *
8473 read_die_and_siblings (const struct die_reader_specs *reader,
8475 gdb_byte **new_info_ptr,
8476 struct die_info *parent)
8478 struct die_info *first_die, *last_sibling;
8482 first_die = last_sibling = NULL;
8486 struct die_info *die
8487 = read_die_and_children_1 (reader, cur_ptr, &cur_ptr, parent);
8491 *new_info_ptr = cur_ptr;
8498 last_sibling->sibling = die;
8504 /* Read the die from the .debug_info section buffer. Set DIEP to
8505 point to a newly allocated die with its information, except for its
8506 child, sibling, and parent fields. Set HAS_CHILDREN to tell
8507 whether the die has children or not. */
8510 read_full_die (const struct die_reader_specs *reader,
8511 struct die_info **diep, gdb_byte *info_ptr,
8514 unsigned int abbrev_number, bytes_read, i, offset;
8515 struct abbrev_info *abbrev;
8516 struct die_info *die;
8517 struct dwarf2_cu *cu = reader->cu;
8518 bfd *abfd = reader->abfd;
8520 offset = info_ptr - reader->buffer;
8521 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
8522 info_ptr += bytes_read;
8530 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
8532 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
8534 bfd_get_filename (abfd));
8536 die = dwarf_alloc_die (cu, abbrev->num_attrs);
8537 die->offset = offset;
8538 die->tag = abbrev->tag;
8539 die->abbrev = abbrev_number;
8541 die->num_attrs = abbrev->num_attrs;
8543 for (i = 0; i < abbrev->num_attrs; ++i)
8544 info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
8545 abfd, info_ptr, cu);
8548 *has_children = abbrev->has_children;
8552 /* In DWARF version 2, the description of the debugging information is
8553 stored in a separate .debug_abbrev section. Before we read any
8554 dies from a section we read in all abbreviations and install them
8555 in a hash table. This function also sets flags in CU describing
8556 the data found in the abbrev table. */
8559 dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu)
8561 struct comp_unit_head *cu_header = &cu->header;
8562 gdb_byte *abbrev_ptr;
8563 struct abbrev_info *cur_abbrev;
8564 unsigned int abbrev_number, bytes_read, abbrev_name;
8565 unsigned int abbrev_form, hash_number;
8566 struct attr_abbrev *cur_attrs;
8567 unsigned int allocated_attrs;
8569 /* Initialize dwarf2 abbrevs. */
8570 obstack_init (&cu->abbrev_obstack);
8571 cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack,
8573 * sizeof (struct abbrev_info *)));
8574 memset (cu->dwarf2_abbrevs, 0,
8575 ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
8577 dwarf2_read_section (dwarf2_per_objfile->objfile,
8578 &dwarf2_per_objfile->abbrev);
8579 abbrev_ptr = dwarf2_per_objfile->abbrev.buffer + cu_header->abbrev_offset;
8580 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8581 abbrev_ptr += bytes_read;
8583 allocated_attrs = ATTR_ALLOC_CHUNK;
8584 cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
8586 /* Loop until we reach an abbrev number of 0. */
8587 while (abbrev_number)
8589 cur_abbrev = dwarf_alloc_abbrev (cu);
8591 /* read in abbrev header */
8592 cur_abbrev->number = abbrev_number;
8593 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8594 abbrev_ptr += bytes_read;
8595 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
8598 if (cur_abbrev->tag == DW_TAG_namespace)
8599 cu->has_namespace_info = 1;
8601 /* now read in declarations */
8602 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8603 abbrev_ptr += bytes_read;
8604 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8605 abbrev_ptr += bytes_read;
8608 if (cur_abbrev->num_attrs == allocated_attrs)
8610 allocated_attrs += ATTR_ALLOC_CHUNK;
8612 = xrealloc (cur_attrs, (allocated_attrs
8613 * sizeof (struct attr_abbrev)));
8616 /* Record whether this compilation unit might have
8617 inter-compilation-unit references. If we don't know what form
8618 this attribute will have, then it might potentially be a
8619 DW_FORM_ref_addr, so we conservatively expect inter-CU
8622 if (abbrev_form == DW_FORM_ref_addr
8623 || abbrev_form == DW_FORM_indirect)
8624 cu->has_form_ref_addr = 1;
8626 cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
8627 cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
8628 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8629 abbrev_ptr += bytes_read;
8630 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8631 abbrev_ptr += bytes_read;
8634 cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack,
8635 (cur_abbrev->num_attrs
8636 * sizeof (struct attr_abbrev)));
8637 memcpy (cur_abbrev->attrs, cur_attrs,
8638 cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
8640 hash_number = abbrev_number % ABBREV_HASH_SIZE;
8641 cur_abbrev->next = cu->dwarf2_abbrevs[hash_number];
8642 cu->dwarf2_abbrevs[hash_number] = cur_abbrev;
8644 /* Get next abbreviation.
8645 Under Irix6 the abbreviations for a compilation unit are not
8646 always properly terminated with an abbrev number of 0.
8647 Exit loop if we encounter an abbreviation which we have
8648 already read (which means we are about to read the abbreviations
8649 for the next compile unit) or if the end of the abbreviation
8650 table is reached. */
8651 if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev.buffer)
8652 >= dwarf2_per_objfile->abbrev.size)
8654 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8655 abbrev_ptr += bytes_read;
8656 if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL)
8663 /* Release the memory used by the abbrev table for a compilation unit. */
8666 dwarf2_free_abbrev_table (void *ptr_to_cu)
8668 struct dwarf2_cu *cu = ptr_to_cu;
8670 obstack_free (&cu->abbrev_obstack, NULL);
8671 cu->dwarf2_abbrevs = NULL;
8674 /* Lookup an abbrev_info structure in the abbrev hash table. */
8676 static struct abbrev_info *
8677 dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu)
8679 unsigned int hash_number;
8680 struct abbrev_info *abbrev;
8682 hash_number = number % ABBREV_HASH_SIZE;
8683 abbrev = cu->dwarf2_abbrevs[hash_number];
8687 if (abbrev->number == number)
8690 abbrev = abbrev->next;
8695 /* Returns nonzero if TAG represents a type that we might generate a partial
8699 is_type_tag_for_partial (int tag)
8704 /* Some types that would be reasonable to generate partial symbols for,
8705 that we don't at present. */
8706 case DW_TAG_array_type:
8707 case DW_TAG_file_type:
8708 case DW_TAG_ptr_to_member_type:
8709 case DW_TAG_set_type:
8710 case DW_TAG_string_type:
8711 case DW_TAG_subroutine_type:
8713 case DW_TAG_base_type:
8714 case DW_TAG_class_type:
8715 case DW_TAG_interface_type:
8716 case DW_TAG_enumeration_type:
8717 case DW_TAG_structure_type:
8718 case DW_TAG_subrange_type:
8719 case DW_TAG_typedef:
8720 case DW_TAG_union_type:
8727 /* Load all DIEs that are interesting for partial symbols into memory. */
8729 static struct partial_die_info *
8730 load_partial_dies (bfd *abfd, gdb_byte *buffer, gdb_byte *info_ptr,
8731 int building_psymtab, struct dwarf2_cu *cu)
8733 struct partial_die_info *part_die;
8734 struct partial_die_info *parent_die, *last_die, *first_die = NULL;
8735 struct abbrev_info *abbrev;
8736 unsigned int bytes_read;
8737 unsigned int load_all = 0;
8739 int nesting_level = 1;
8744 if (cu->per_cu && cu->per_cu->load_all_dies)
8748 = htab_create_alloc_ex (cu->header.length / 12,
8752 &cu->comp_unit_obstack,
8753 hashtab_obstack_allocate,
8754 dummy_obstack_deallocate);
8756 part_die = obstack_alloc (&cu->comp_unit_obstack,
8757 sizeof (struct partial_die_info));
8761 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
8763 /* A NULL abbrev means the end of a series of children. */
8766 if (--nesting_level == 0)
8768 /* PART_DIE was probably the last thing allocated on the
8769 comp_unit_obstack, so we could call obstack_free
8770 here. We don't do that because the waste is small,
8771 and will be cleaned up when we're done with this
8772 compilation unit. This way, we're also more robust
8773 against other users of the comp_unit_obstack. */
8776 info_ptr += bytes_read;
8777 last_die = parent_die;
8778 parent_die = parent_die->die_parent;
8782 /* Check for template arguments. We never save these; if
8783 they're seen, we just mark the parent, and go on our way. */
8784 if (parent_die != NULL
8785 && cu->language == language_cplus
8786 && (abbrev->tag == DW_TAG_template_type_param
8787 || abbrev->tag == DW_TAG_template_value_param))
8789 parent_die->has_template_arguments = 1;
8793 /* We don't need a partial DIE for the template argument. */
8794 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev,
8800 /* We only recurse into subprograms looking for template arguments.
8801 Skip their other children. */
8803 && cu->language == language_cplus
8804 && parent_die != NULL
8805 && parent_die->tag == DW_TAG_subprogram)
8807 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
8811 /* Check whether this DIE is interesting enough to save. Normally
8812 we would not be interested in members here, but there may be
8813 later variables referencing them via DW_AT_specification (for
8816 && !is_type_tag_for_partial (abbrev->tag)
8817 && abbrev->tag != DW_TAG_constant
8818 && abbrev->tag != DW_TAG_enumerator
8819 && abbrev->tag != DW_TAG_subprogram
8820 && abbrev->tag != DW_TAG_lexical_block
8821 && abbrev->tag != DW_TAG_variable
8822 && abbrev->tag != DW_TAG_namespace
8823 && abbrev->tag != DW_TAG_module
8824 && abbrev->tag != DW_TAG_member)
8826 /* Otherwise we skip to the next sibling, if any. */
8827 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
8831 info_ptr = read_partial_die (part_die, abbrev, bytes_read, abfd,
8832 buffer, info_ptr, cu);
8834 /* This two-pass algorithm for processing partial symbols has a
8835 high cost in cache pressure. Thus, handle some simple cases
8836 here which cover the majority of C partial symbols. DIEs
8837 which neither have specification tags in them, nor could have
8838 specification tags elsewhere pointing at them, can simply be
8839 processed and discarded.
8841 This segment is also optional; scan_partial_symbols and
8842 add_partial_symbol will handle these DIEs if we chain
8843 them in normally. When compilers which do not emit large
8844 quantities of duplicate debug information are more common,
8845 this code can probably be removed. */
8847 /* Any complete simple types at the top level (pretty much all
8848 of them, for a language without namespaces), can be processed
8850 if (parent_die == NULL
8851 && part_die->has_specification == 0
8852 && part_die->is_declaration == 0
8853 && (part_die->tag == DW_TAG_typedef
8854 || part_die->tag == DW_TAG_base_type
8855 || part_die->tag == DW_TAG_subrange_type))
8857 if (building_psymtab && part_die->name != NULL)
8858 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
8859 VAR_DOMAIN, LOC_TYPEDEF,
8860 &cu->objfile->static_psymbols,
8861 0, (CORE_ADDR) 0, cu->language, cu->objfile);
8862 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
8866 /* If we're at the second level, and we're an enumerator, and
8867 our parent has no specification (meaning possibly lives in a
8868 namespace elsewhere), then we can add the partial symbol now
8869 instead of queueing it. */
8870 if (part_die->tag == DW_TAG_enumerator
8871 && parent_die != NULL
8872 && parent_die->die_parent == NULL
8873 && parent_die->tag == DW_TAG_enumeration_type
8874 && parent_die->has_specification == 0)
8876 if (part_die->name == NULL)
8877 complaint (&symfile_complaints,
8878 _("malformed enumerator DIE ignored"));
8879 else if (building_psymtab)
8880 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
8881 VAR_DOMAIN, LOC_CONST,
8882 (cu->language == language_cplus
8883 || cu->language == language_java)
8884 ? &cu->objfile->global_psymbols
8885 : &cu->objfile->static_psymbols,
8886 0, (CORE_ADDR) 0, cu->language, cu->objfile);
8888 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
8892 /* We'll save this DIE so link it in. */
8893 part_die->die_parent = parent_die;
8894 part_die->die_sibling = NULL;
8895 part_die->die_child = NULL;
8897 if (last_die && last_die == parent_die)
8898 last_die->die_child = part_die;
8900 last_die->die_sibling = part_die;
8902 last_die = part_die;
8904 if (first_die == NULL)
8905 first_die = part_die;
8907 /* Maybe add the DIE to the hash table. Not all DIEs that we
8908 find interesting need to be in the hash table, because we
8909 also have the parent/sibling/child chains; only those that we
8910 might refer to by offset later during partial symbol reading.
8912 For now this means things that might have be the target of a
8913 DW_AT_specification, DW_AT_abstract_origin, or
8914 DW_AT_extension. DW_AT_extension will refer only to
8915 namespaces; DW_AT_abstract_origin refers to functions (and
8916 many things under the function DIE, but we do not recurse
8917 into function DIEs during partial symbol reading) and
8918 possibly variables as well; DW_AT_specification refers to
8919 declarations. Declarations ought to have the DW_AT_declaration
8920 flag. It happens that GCC forgets to put it in sometimes, but
8921 only for functions, not for types.
8923 Adding more things than necessary to the hash table is harmless
8924 except for the performance cost. Adding too few will result in
8925 wasted time in find_partial_die, when we reread the compilation
8926 unit with load_all_dies set. */
8929 || abbrev->tag == DW_TAG_constant
8930 || abbrev->tag == DW_TAG_subprogram
8931 || abbrev->tag == DW_TAG_variable
8932 || abbrev->tag == DW_TAG_namespace
8933 || part_die->is_declaration)
8937 slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
8938 part_die->offset, INSERT);
8942 part_die = obstack_alloc (&cu->comp_unit_obstack,
8943 sizeof (struct partial_die_info));
8945 /* For some DIEs we want to follow their children (if any). For C
8946 we have no reason to follow the children of structures; for other
8947 languages we have to, so that we can get at method physnames
8948 to infer fully qualified class names, for DW_AT_specification,
8949 and for C++ template arguments. For C++, we also look one level
8950 inside functions to find template arguments (if the name of the
8951 function does not already contain the template arguments).
8953 For Ada, we need to scan the children of subprograms and lexical
8954 blocks as well because Ada allows the definition of nested
8955 entities that could be interesting for the debugger, such as
8956 nested subprograms for instance. */
8957 if (last_die->has_children
8959 || last_die->tag == DW_TAG_namespace
8960 || last_die->tag == DW_TAG_module
8961 || last_die->tag == DW_TAG_enumeration_type
8962 || (cu->language == language_cplus
8963 && last_die->tag == DW_TAG_subprogram
8964 && (last_die->name == NULL
8965 || strchr (last_die->name, '<') == NULL))
8966 || (cu->language != language_c
8967 && (last_die->tag == DW_TAG_class_type
8968 || last_die->tag == DW_TAG_interface_type
8969 || last_die->tag == DW_TAG_structure_type
8970 || last_die->tag == DW_TAG_union_type))
8971 || (cu->language == language_ada
8972 && (last_die->tag == DW_TAG_subprogram
8973 || last_die->tag == DW_TAG_lexical_block))))
8976 parent_die = last_die;
8980 /* Otherwise we skip to the next sibling, if any. */
8981 info_ptr = locate_pdi_sibling (last_die, buffer, info_ptr, abfd, cu);
8983 /* Back to the top, do it again. */
8987 /* Read a minimal amount of information into the minimal die structure. */
8990 read_partial_die (struct partial_die_info *part_die,
8991 struct abbrev_info *abbrev,
8992 unsigned int abbrev_len, bfd *abfd,
8993 gdb_byte *buffer, gdb_byte *info_ptr,
8994 struct dwarf2_cu *cu)
8997 struct attribute attr;
8998 int has_low_pc_attr = 0;
8999 int has_high_pc_attr = 0;
9001 memset (part_die, 0, sizeof (struct partial_die_info));
9003 part_die->offset = info_ptr - buffer;
9005 info_ptr += abbrev_len;
9010 part_die->tag = abbrev->tag;
9011 part_die->has_children = abbrev->has_children;
9013 for (i = 0; i < abbrev->num_attrs; ++i)
9015 info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu);
9017 /* Store the data if it is of an attribute we want to keep in a
9018 partial symbol table. */
9022 switch (part_die->tag)
9024 case DW_TAG_compile_unit:
9025 case DW_TAG_type_unit:
9026 /* Compilation units have a DW_AT_name that is a filename, not
9027 a source language identifier. */
9028 case DW_TAG_enumeration_type:
9029 case DW_TAG_enumerator:
9030 /* These tags always have simple identifiers already; no need
9031 to canonicalize them. */
9032 part_die->name = DW_STRING (&attr);
9036 = dwarf2_canonicalize_name (DW_STRING (&attr), cu,
9037 &cu->objfile->objfile_obstack);
9041 case DW_AT_linkage_name:
9042 case DW_AT_MIPS_linkage_name:
9043 /* Note that both forms of linkage name might appear. We
9044 assume they will be the same, and we only store the last
9046 if (cu->language == language_ada)
9047 part_die->name = DW_STRING (&attr);
9048 part_die->linkage_name = DW_STRING (&attr);
9051 has_low_pc_attr = 1;
9052 part_die->lowpc = DW_ADDR (&attr);
9055 has_high_pc_attr = 1;
9056 part_die->highpc = DW_ADDR (&attr);
9058 case DW_AT_location:
9059 /* Support the .debug_loc offsets. */
9060 if (attr_form_is_block (&attr))
9062 part_die->locdesc = DW_BLOCK (&attr);
9064 else if (attr_form_is_section_offset (&attr))
9066 dwarf2_complex_location_expr_complaint ();
9070 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
9071 "partial symbol information");
9074 case DW_AT_external:
9075 part_die->is_external = DW_UNSND (&attr);
9077 case DW_AT_declaration:
9078 part_die->is_declaration = DW_UNSND (&attr);
9081 part_die->has_type = 1;
9083 case DW_AT_abstract_origin:
9084 case DW_AT_specification:
9085 case DW_AT_extension:
9086 part_die->has_specification = 1;
9087 part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
9090 /* Ignore absolute siblings, they might point outside of
9091 the current compile unit. */
9092 if (attr.form == DW_FORM_ref_addr)
9093 complaint (&symfile_complaints,
9094 _("ignoring absolute DW_AT_sibling"));
9096 part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr);
9098 case DW_AT_byte_size:
9099 part_die->has_byte_size = 1;
9101 case DW_AT_calling_convention:
9102 /* DWARF doesn't provide a way to identify a program's source-level
9103 entry point. DW_AT_calling_convention attributes are only meant
9104 to describe functions' calling conventions.
9106 However, because it's a necessary piece of information in
9107 Fortran, and because DW_CC_program is the only piece of debugging
9108 information whose definition refers to a 'main program' at all,
9109 several compilers have begun marking Fortran main programs with
9110 DW_CC_program --- even when those functions use the standard
9111 calling conventions.
9113 So until DWARF specifies a way to provide this information and
9114 compilers pick up the new representation, we'll support this
9116 if (DW_UNSND (&attr) == DW_CC_program
9117 && cu->language == language_fortran)
9119 set_main_name (part_die->name);
9121 /* As this DIE has a static linkage the name would be difficult
9122 to look up later. */
9123 language_of_main = language_fortran;
9131 if (has_low_pc_attr && has_high_pc_attr)
9133 /* When using the GNU linker, .gnu.linkonce. sections are used to
9134 eliminate duplicate copies of functions and vtables and such.
9135 The linker will arbitrarily choose one and discard the others.
9136 The AT_*_pc values for such functions refer to local labels in
9137 these sections. If the section from that file was discarded, the
9138 labels are not in the output, so the relocs get a value of 0.
9139 If this is a discarded function, mark the pc bounds as invalid,
9140 so that GDB will ignore it. */
9141 if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero)
9143 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
9145 complaint (&symfile_complaints,
9146 _("DW_AT_low_pc %s is zero "
9147 "for DIE at 0x%x [in module %s]"),
9148 paddress (gdbarch, part_die->lowpc),
9149 part_die->offset, cu->objfile->name);
9151 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
9152 else if (part_die->lowpc >= part_die->highpc)
9154 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
9156 complaint (&symfile_complaints,
9157 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
9158 "for DIE at 0x%x [in module %s]"),
9159 paddress (gdbarch, part_die->lowpc),
9160 paddress (gdbarch, part_die->highpc),
9161 part_die->offset, cu->objfile->name);
9164 part_die->has_pc_info = 1;
9170 /* Find a cached partial DIE at OFFSET in CU. */
9172 static struct partial_die_info *
9173 find_partial_die_in_comp_unit (unsigned int offset, struct dwarf2_cu *cu)
9175 struct partial_die_info *lookup_die = NULL;
9176 struct partial_die_info part_die;
9178 part_die.offset = offset;
9179 lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset);
9184 /* Find a partial DIE at OFFSET, which may or may not be in CU,
9185 except in the case of .debug_types DIEs which do not reference
9186 outside their CU (they do however referencing other types via
9189 static struct partial_die_info *
9190 find_partial_die (unsigned int offset, struct dwarf2_cu *cu)
9192 struct dwarf2_per_cu_data *per_cu = NULL;
9193 struct partial_die_info *pd = NULL;
9195 if (cu->per_cu->from_debug_types)
9197 pd = find_partial_die_in_comp_unit (offset, cu);
9203 if (offset_in_cu_p (&cu->header, offset))
9205 pd = find_partial_die_in_comp_unit (offset, cu);
9210 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
9212 if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL)
9213 load_partial_comp_unit (per_cu, cu->objfile);
9215 per_cu->cu->last_used = 0;
9216 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
9218 if (pd == NULL && per_cu->load_all_dies == 0)
9220 struct cleanup *back_to;
9221 struct partial_die_info comp_unit_die;
9222 struct abbrev_info *abbrev;
9223 unsigned int bytes_read;
9226 per_cu->load_all_dies = 1;
9228 /* Re-read the DIEs. */
9229 back_to = make_cleanup (null_cleanup, 0);
9230 if (per_cu->cu->dwarf2_abbrevs == NULL)
9232 dwarf2_read_abbrevs (per_cu->cu->objfile->obfd, per_cu->cu);
9233 make_cleanup (dwarf2_free_abbrev_table, per_cu->cu);
9235 info_ptr = (dwarf2_per_objfile->info.buffer
9236 + per_cu->cu->header.offset
9237 + per_cu->cu->header.first_die_offset);
9238 abbrev = peek_die_abbrev (info_ptr, &bytes_read, per_cu->cu);
9239 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
9240 per_cu->cu->objfile->obfd,
9241 dwarf2_per_objfile->info.buffer, info_ptr,
9243 if (comp_unit_die.has_children)
9244 load_partial_dies (per_cu->cu->objfile->obfd,
9245 dwarf2_per_objfile->info.buffer, info_ptr,
9247 do_cleanups (back_to);
9249 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
9255 internal_error (__FILE__, __LINE__,
9256 _("could not find partial DIE 0x%x "
9257 "in cache [from module %s]\n"),
9258 offset, bfd_get_filename (cu->objfile->obfd));
9262 /* See if we can figure out if the class lives in a namespace. We do
9263 this by looking for a member function; its demangled name will
9264 contain namespace info, if there is any. */
9267 guess_partial_die_structure_name (struct partial_die_info *struct_pdi,
9268 struct dwarf2_cu *cu)
9270 /* NOTE: carlton/2003-10-07: Getting the info this way changes
9271 what template types look like, because the demangler
9272 frequently doesn't give the same name as the debug info. We
9273 could fix this by only using the demangled name to get the
9274 prefix (but see comment in read_structure_type). */
9276 struct partial_die_info *real_pdi;
9277 struct partial_die_info *child_pdi;
9279 /* If this DIE (this DIE's specification, if any) has a parent, then
9280 we should not do this. We'll prepend the parent's fully qualified
9281 name when we create the partial symbol. */
9283 real_pdi = struct_pdi;
9284 while (real_pdi->has_specification)
9285 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
9287 if (real_pdi->die_parent != NULL)
9290 for (child_pdi = struct_pdi->die_child;
9292 child_pdi = child_pdi->die_sibling)
9294 if (child_pdi->tag == DW_TAG_subprogram
9295 && child_pdi->linkage_name != NULL)
9297 char *actual_class_name
9298 = language_class_name_from_physname (cu->language_defn,
9299 child_pdi->linkage_name);
9300 if (actual_class_name != NULL)
9303 = obsavestring (actual_class_name,
9304 strlen (actual_class_name),
9305 &cu->objfile->objfile_obstack);
9306 xfree (actual_class_name);
9313 /* Adjust PART_DIE before generating a symbol for it. This function
9314 may set the is_external flag or change the DIE's name. */
9317 fixup_partial_die (struct partial_die_info *part_die,
9318 struct dwarf2_cu *cu)
9320 /* Once we've fixed up a die, there's no point in doing so again.
9321 This also avoids a memory leak if we were to call
9322 guess_partial_die_structure_name multiple times. */
9323 if (part_die->fixup_called)
9326 /* If we found a reference attribute and the DIE has no name, try
9327 to find a name in the referred to DIE. */
9329 if (part_die->name == NULL && part_die->has_specification)
9331 struct partial_die_info *spec_die;
9333 spec_die = find_partial_die (part_die->spec_offset, cu);
9335 fixup_partial_die (spec_die, cu);
9339 part_die->name = spec_die->name;
9341 /* Copy DW_AT_external attribute if it is set. */
9342 if (spec_die->is_external)
9343 part_die->is_external = spec_die->is_external;
9347 /* Set default names for some unnamed DIEs. */
9349 if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
9350 part_die->name = "(anonymous namespace)";
9352 /* If there is no parent die to provide a namespace, and there are
9353 children, see if we can determine the namespace from their linkage
9355 NOTE: We need to do this even if cu->has_namespace_info != 0.
9356 gcc-4.5 -gdwarf-4 can drop the enclosing namespace. */
9357 if (cu->language == language_cplus
9358 && dwarf2_per_objfile->types.asection != NULL
9359 && part_die->die_parent == NULL
9360 && part_die->has_children
9361 && (part_die->tag == DW_TAG_class_type
9362 || part_die->tag == DW_TAG_structure_type
9363 || part_die->tag == DW_TAG_union_type))
9364 guess_partial_die_structure_name (part_die, cu);
9366 part_die->fixup_called = 1;
9369 /* Read an attribute value described by an attribute form. */
9372 read_attribute_value (struct attribute *attr, unsigned form,
9373 bfd *abfd, gdb_byte *info_ptr,
9374 struct dwarf2_cu *cu)
9376 struct comp_unit_head *cu_header = &cu->header;
9377 unsigned int bytes_read;
9378 struct dwarf_block *blk;
9383 case DW_FORM_ref_addr:
9384 if (cu->header.version == 2)
9385 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
9387 DW_ADDR (attr) = read_offset (abfd, info_ptr,
9388 &cu->header, &bytes_read);
9389 info_ptr += bytes_read;
9392 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
9393 info_ptr += bytes_read;
9395 case DW_FORM_block2:
9396 blk = dwarf_alloc_block (cu);
9397 blk->size = read_2_bytes (abfd, info_ptr);
9399 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
9400 info_ptr += blk->size;
9401 DW_BLOCK (attr) = blk;
9403 case DW_FORM_block4:
9404 blk = dwarf_alloc_block (cu);
9405 blk->size = read_4_bytes (abfd, info_ptr);
9407 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
9408 info_ptr += blk->size;
9409 DW_BLOCK (attr) = blk;
9412 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
9416 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
9420 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
9423 case DW_FORM_sec_offset:
9424 DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
9425 info_ptr += bytes_read;
9427 case DW_FORM_string:
9428 DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read);
9429 DW_STRING_IS_CANONICAL (attr) = 0;
9430 info_ptr += bytes_read;
9433 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
9435 DW_STRING_IS_CANONICAL (attr) = 0;
9436 info_ptr += bytes_read;
9438 case DW_FORM_exprloc:
9440 blk = dwarf_alloc_block (cu);
9441 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
9442 info_ptr += bytes_read;
9443 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
9444 info_ptr += blk->size;
9445 DW_BLOCK (attr) = blk;
9447 case DW_FORM_block1:
9448 blk = dwarf_alloc_block (cu);
9449 blk->size = read_1_byte (abfd, info_ptr);
9451 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
9452 info_ptr += blk->size;
9453 DW_BLOCK (attr) = blk;
9456 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
9460 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
9463 case DW_FORM_flag_present:
9464 DW_UNSND (attr) = 1;
9467 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
9468 info_ptr += bytes_read;
9471 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
9472 info_ptr += bytes_read;
9475 DW_ADDR (attr) = cu->header.offset + read_1_byte (abfd, info_ptr);
9479 DW_ADDR (attr) = cu->header.offset + read_2_bytes (abfd, info_ptr);
9483 DW_ADDR (attr) = cu->header.offset + read_4_bytes (abfd, info_ptr);
9487 DW_ADDR (attr) = cu->header.offset + read_8_bytes (abfd, info_ptr);
9491 /* Convert the signature to something we can record in DW_UNSND
9493 NOTE: This is NULL if the type wasn't found. */
9494 DW_SIGNATURED_TYPE (attr) =
9495 lookup_signatured_type (cu->objfile, read_8_bytes (abfd, info_ptr));
9498 case DW_FORM_ref_udata:
9499 DW_ADDR (attr) = (cu->header.offset
9500 + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
9501 info_ptr += bytes_read;
9503 case DW_FORM_indirect:
9504 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
9505 info_ptr += bytes_read;
9506 info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu);
9509 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
9510 dwarf_form_name (form),
9511 bfd_get_filename (abfd));
9514 /* We have seen instances where the compiler tried to emit a byte
9515 size attribute of -1 which ended up being encoded as an unsigned
9516 0xffffffff. Although 0xffffffff is technically a valid size value,
9517 an object of this size seems pretty unlikely so we can relatively
9518 safely treat these cases as if the size attribute was invalid and
9519 treat them as zero by default. */
9520 if (attr->name == DW_AT_byte_size
9521 && form == DW_FORM_data4
9522 && DW_UNSND (attr) >= 0xffffffff)
9525 (&symfile_complaints,
9526 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
9527 hex_string (DW_UNSND (attr)));
9528 DW_UNSND (attr) = 0;
9534 /* Read an attribute described by an abbreviated attribute. */
9537 read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
9538 bfd *abfd, gdb_byte *info_ptr, struct dwarf2_cu *cu)
9540 attr->name = abbrev->name;
9541 return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu);
9544 /* Read dwarf information from a buffer. */
9547 read_1_byte (bfd *abfd, gdb_byte *buf)
9549 return bfd_get_8 (abfd, buf);
9553 read_1_signed_byte (bfd *abfd, gdb_byte *buf)
9555 return bfd_get_signed_8 (abfd, buf);
9559 read_2_bytes (bfd *abfd, gdb_byte *buf)
9561 return bfd_get_16 (abfd, buf);
9565 read_2_signed_bytes (bfd *abfd, gdb_byte *buf)
9567 return bfd_get_signed_16 (abfd, buf);
9571 read_4_bytes (bfd *abfd, gdb_byte *buf)
9573 return bfd_get_32 (abfd, buf);
9577 read_4_signed_bytes (bfd *abfd, gdb_byte *buf)
9579 return bfd_get_signed_32 (abfd, buf);
9583 read_8_bytes (bfd *abfd, gdb_byte *buf)
9585 return bfd_get_64 (abfd, buf);
9589 read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
9590 unsigned int *bytes_read)
9592 struct comp_unit_head *cu_header = &cu->header;
9593 CORE_ADDR retval = 0;
9595 if (cu_header->signed_addr_p)
9597 switch (cu_header->addr_size)
9600 retval = bfd_get_signed_16 (abfd, buf);
9603 retval = bfd_get_signed_32 (abfd, buf);
9606 retval = bfd_get_signed_64 (abfd, buf);
9609 internal_error (__FILE__, __LINE__,
9610 _("read_address: bad switch, signed [in module %s]"),
9611 bfd_get_filename (abfd));
9616 switch (cu_header->addr_size)
9619 retval = bfd_get_16 (abfd, buf);
9622 retval = bfd_get_32 (abfd, buf);
9625 retval = bfd_get_64 (abfd, buf);
9628 internal_error (__FILE__, __LINE__,
9629 _("read_address: bad switch, "
9630 "unsigned [in module %s]"),
9631 bfd_get_filename (abfd));
9635 *bytes_read = cu_header->addr_size;
9639 /* Read the initial length from a section. The (draft) DWARF 3
9640 specification allows the initial length to take up either 4 bytes
9641 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
9642 bytes describe the length and all offsets will be 8 bytes in length
9645 An older, non-standard 64-bit format is also handled by this
9646 function. The older format in question stores the initial length
9647 as an 8-byte quantity without an escape value. Lengths greater
9648 than 2^32 aren't very common which means that the initial 4 bytes
9649 is almost always zero. Since a length value of zero doesn't make
9650 sense for the 32-bit format, this initial zero can be considered to
9651 be an escape value which indicates the presence of the older 64-bit
9652 format. As written, the code can't detect (old format) lengths
9653 greater than 4GB. If it becomes necessary to handle lengths
9654 somewhat larger than 4GB, we could allow other small values (such
9655 as the non-sensical values of 1, 2, and 3) to also be used as
9656 escape values indicating the presence of the old format.
9658 The value returned via bytes_read should be used to increment the
9659 relevant pointer after calling read_initial_length().
9661 [ Note: read_initial_length() and read_offset() are based on the
9662 document entitled "DWARF Debugging Information Format", revision
9663 3, draft 8, dated November 19, 2001. This document was obtained
9666 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
9668 This document is only a draft and is subject to change. (So beware.)
9670 Details regarding the older, non-standard 64-bit format were
9671 determined empirically by examining 64-bit ELF files produced by
9672 the SGI toolchain on an IRIX 6.5 machine.
9674 - Kevin, July 16, 2002
9678 read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read)
9680 LONGEST length = bfd_get_32 (abfd, buf);
9682 if (length == 0xffffffff)
9684 length = bfd_get_64 (abfd, buf + 4);
9687 else if (length == 0)
9689 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
9690 length = bfd_get_64 (abfd, buf);
9701 /* Cover function for read_initial_length.
9702 Returns the length of the object at BUF, and stores the size of the
9703 initial length in *BYTES_READ and stores the size that offsets will be in
9705 If the initial length size is not equivalent to that specified in
9706 CU_HEADER then issue a complaint.
9707 This is useful when reading non-comp-unit headers. */
9710 read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf,
9711 const struct comp_unit_head *cu_header,
9712 unsigned int *bytes_read,
9713 unsigned int *offset_size)
9715 LONGEST length = read_initial_length (abfd, buf, bytes_read);
9717 gdb_assert (cu_header->initial_length_size == 4
9718 || cu_header->initial_length_size == 8
9719 || cu_header->initial_length_size == 12);
9721 if (cu_header->initial_length_size != *bytes_read)
9722 complaint (&symfile_complaints,
9723 _("intermixed 32-bit and 64-bit DWARF sections"));
9725 *offset_size = (*bytes_read == 4) ? 4 : 8;
9729 /* Read an offset from the data stream. The size of the offset is
9730 given by cu_header->offset_size. */
9733 read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
9734 unsigned int *bytes_read)
9736 LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size);
9738 *bytes_read = cu_header->offset_size;
9742 /* Read an offset from the data stream. */
9745 read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size)
9749 switch (offset_size)
9752 retval = bfd_get_32 (abfd, buf);
9755 retval = bfd_get_64 (abfd, buf);
9758 internal_error (__FILE__, __LINE__,
9759 _("read_offset_1: bad switch [in module %s]"),
9760 bfd_get_filename (abfd));
9767 read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
9769 /* If the size of a host char is 8 bits, we can return a pointer
9770 to the buffer, otherwise we have to copy the data to a buffer
9771 allocated on the temporary obstack. */
9772 gdb_assert (HOST_CHAR_BIT == 8);
9777 read_direct_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
9779 /* If the size of a host char is 8 bits, we can return a pointer
9780 to the string, otherwise we have to copy the string to a buffer
9781 allocated on the temporary obstack. */
9782 gdb_assert (HOST_CHAR_BIT == 8);
9785 *bytes_read_ptr = 1;
9788 *bytes_read_ptr = strlen ((char *) buf) + 1;
9789 return (char *) buf;
9793 read_indirect_string (bfd *abfd, gdb_byte *buf,
9794 const struct comp_unit_head *cu_header,
9795 unsigned int *bytes_read_ptr)
9797 LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr);
9799 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str);
9800 if (dwarf2_per_objfile->str.buffer == NULL)
9802 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
9803 bfd_get_filename (abfd));
9806 if (str_offset >= dwarf2_per_objfile->str.size)
9808 error (_("DW_FORM_strp pointing outside of "
9809 ".debug_str section [in module %s]"),
9810 bfd_get_filename (abfd));
9813 gdb_assert (HOST_CHAR_BIT == 8);
9814 if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
9816 return (char *) (dwarf2_per_objfile->str.buffer + str_offset);
9819 static unsigned long
9820 read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
9822 unsigned long result;
9823 unsigned int num_read;
9833 byte = bfd_get_8 (abfd, buf);
9836 result |= ((unsigned long)(byte & 127) << shift);
9837 if ((byte & 128) == 0)
9843 *bytes_read_ptr = num_read;
9848 read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
9851 int i, shift, num_read;
9860 byte = bfd_get_8 (abfd, buf);
9863 result |= ((long)(byte & 127) << shift);
9865 if ((byte & 128) == 0)
9870 if ((shift < 8 * sizeof (result)) && (byte & 0x40))
9871 result |= -(((long)1) << shift);
9872 *bytes_read_ptr = num_read;
9876 /* Return a pointer to just past the end of an LEB128 number in BUF. */
9879 skip_leb128 (bfd *abfd, gdb_byte *buf)
9885 byte = bfd_get_8 (abfd, buf);
9887 if ((byte & 128) == 0)
9893 set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
9900 cu->language = language_c;
9902 case DW_LANG_C_plus_plus:
9903 cu->language = language_cplus;
9906 cu->language = language_d;
9908 case DW_LANG_Fortran77:
9909 case DW_LANG_Fortran90:
9910 case DW_LANG_Fortran95:
9911 cu->language = language_fortran;
9913 case DW_LANG_Mips_Assembler:
9914 cu->language = language_asm;
9917 cu->language = language_java;
9921 cu->language = language_ada;
9923 case DW_LANG_Modula2:
9924 cu->language = language_m2;
9926 case DW_LANG_Pascal83:
9927 cu->language = language_pascal;
9930 cu->language = language_objc;
9932 case DW_LANG_Cobol74:
9933 case DW_LANG_Cobol85:
9935 cu->language = language_minimal;
9938 cu->language_defn = language_def (cu->language);
9941 /* Return the named attribute or NULL if not there. */
9943 static struct attribute *
9944 dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
9947 struct attribute *spec = NULL;
9949 for (i = 0; i < die->num_attrs; ++i)
9951 if (die->attrs[i].name == name)
9952 return &die->attrs[i];
9953 if (die->attrs[i].name == DW_AT_specification
9954 || die->attrs[i].name == DW_AT_abstract_origin)
9955 spec = &die->attrs[i];
9960 die = follow_die_ref (die, spec, &cu);
9961 return dwarf2_attr (die, name, cu);
9967 /* Return the named attribute or NULL if not there,
9968 but do not follow DW_AT_specification, etc.
9969 This is for use in contexts where we're reading .debug_types dies.
9970 Following DW_AT_specification, DW_AT_abstract_origin will take us
9971 back up the chain, and we want to go down. */
9973 static struct attribute *
9974 dwarf2_attr_no_follow (struct die_info *die, unsigned int name,
9975 struct dwarf2_cu *cu)
9979 for (i = 0; i < die->num_attrs; ++i)
9980 if (die->attrs[i].name == name)
9981 return &die->attrs[i];
9986 /* Return non-zero iff the attribute NAME is defined for the given DIE,
9987 and holds a non-zero value. This function should only be used for
9988 DW_FORM_flag or DW_FORM_flag_present attributes. */
9991 dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
9993 struct attribute *attr = dwarf2_attr (die, name, cu);
9995 return (attr && DW_UNSND (attr));
9999 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
10001 /* A DIE is a declaration if it has a DW_AT_declaration attribute
10002 which value is non-zero. However, we have to be careful with
10003 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
10004 (via dwarf2_flag_true_p) follows this attribute. So we may
10005 end up accidently finding a declaration attribute that belongs
10006 to a different DIE referenced by the specification attribute,
10007 even though the given DIE does not have a declaration attribute. */
10008 return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
10009 && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
10012 /* Return the die giving the specification for DIE, if there is
10013 one. *SPEC_CU is the CU containing DIE on input, and the CU
10014 containing the return value on output. If there is no
10015 specification, but there is an abstract origin, that is
10018 static struct die_info *
10019 die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
10021 struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
10024 if (spec_attr == NULL)
10025 spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu);
10027 if (spec_attr == NULL)
10030 return follow_die_ref (die, spec_attr, spec_cu);
10033 /* Free the line_header structure *LH, and any arrays and strings it
10035 NOTE: This is also used as a "cleanup" function. */
10038 free_line_header (struct line_header *lh)
10040 if (lh->standard_opcode_lengths)
10041 xfree (lh->standard_opcode_lengths);
10043 /* Remember that all the lh->file_names[i].name pointers are
10044 pointers into debug_line_buffer, and don't need to be freed. */
10045 if (lh->file_names)
10046 xfree (lh->file_names);
10048 /* Similarly for the include directory names. */
10049 if (lh->include_dirs)
10050 xfree (lh->include_dirs);
10055 /* Add an entry to LH's include directory table. */
10058 add_include_dir (struct line_header *lh, char *include_dir)
10060 /* Grow the array if necessary. */
10061 if (lh->include_dirs_size == 0)
10063 lh->include_dirs_size = 1; /* for testing */
10064 lh->include_dirs = xmalloc (lh->include_dirs_size
10065 * sizeof (*lh->include_dirs));
10067 else if (lh->num_include_dirs >= lh->include_dirs_size)
10069 lh->include_dirs_size *= 2;
10070 lh->include_dirs = xrealloc (lh->include_dirs,
10071 (lh->include_dirs_size
10072 * sizeof (*lh->include_dirs)));
10075 lh->include_dirs[lh->num_include_dirs++] = include_dir;
10078 /* Add an entry to LH's file name table. */
10081 add_file_name (struct line_header *lh,
10083 unsigned int dir_index,
10084 unsigned int mod_time,
10085 unsigned int length)
10087 struct file_entry *fe;
10089 /* Grow the array if necessary. */
10090 if (lh->file_names_size == 0)
10092 lh->file_names_size = 1; /* for testing */
10093 lh->file_names = xmalloc (lh->file_names_size
10094 * sizeof (*lh->file_names));
10096 else if (lh->num_file_names >= lh->file_names_size)
10098 lh->file_names_size *= 2;
10099 lh->file_names = xrealloc (lh->file_names,
10100 (lh->file_names_size
10101 * sizeof (*lh->file_names)));
10104 fe = &lh->file_names[lh->num_file_names++];
10106 fe->dir_index = dir_index;
10107 fe->mod_time = mod_time;
10108 fe->length = length;
10109 fe->included_p = 0;
10113 /* Read the statement program header starting at OFFSET in
10114 .debug_line, according to the endianness of ABFD. Return a pointer
10115 to a struct line_header, allocated using xmalloc.
10117 NOTE: the strings in the include directory and file name tables of
10118 the returned object point into debug_line_buffer, and must not be
10121 static struct line_header *
10122 dwarf_decode_line_header (unsigned int offset, bfd *abfd,
10123 struct dwarf2_cu *cu)
10125 struct cleanup *back_to;
10126 struct line_header *lh;
10127 gdb_byte *line_ptr;
10128 unsigned int bytes_read, offset_size;
10130 char *cur_dir, *cur_file;
10132 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->line);
10133 if (dwarf2_per_objfile->line.buffer == NULL)
10135 complaint (&symfile_complaints, _("missing .debug_line section"));
10139 /* Make sure that at least there's room for the total_length field.
10140 That could be 12 bytes long, but we're just going to fudge that. */
10141 if (offset + 4 >= dwarf2_per_objfile->line.size)
10143 dwarf2_statement_list_fits_in_line_number_section_complaint ();
10147 lh = xmalloc (sizeof (*lh));
10148 memset (lh, 0, sizeof (*lh));
10149 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
10152 line_ptr = dwarf2_per_objfile->line.buffer + offset;
10154 /* Read in the header. */
10156 read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header,
10157 &bytes_read, &offset_size);
10158 line_ptr += bytes_read;
10159 if (line_ptr + lh->total_length > (dwarf2_per_objfile->line.buffer
10160 + dwarf2_per_objfile->line.size))
10162 dwarf2_statement_list_fits_in_line_number_section_complaint ();
10165 lh->statement_program_end = line_ptr + lh->total_length;
10166 lh->version = read_2_bytes (abfd, line_ptr);
10168 lh->header_length = read_offset_1 (abfd, line_ptr, offset_size);
10169 line_ptr += offset_size;
10170 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
10172 if (lh->version >= 4)
10174 lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr);
10178 lh->maximum_ops_per_instruction = 1;
10180 if (lh->maximum_ops_per_instruction == 0)
10182 lh->maximum_ops_per_instruction = 1;
10183 complaint (&symfile_complaints,
10184 _("invalid maximum_ops_per_instruction "
10185 "in `.debug_line' section"));
10188 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
10190 lh->line_base = read_1_signed_byte (abfd, line_ptr);
10192 lh->line_range = read_1_byte (abfd, line_ptr);
10194 lh->opcode_base = read_1_byte (abfd, line_ptr);
10196 lh->standard_opcode_lengths
10197 = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
10199 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
10200 for (i = 1; i < lh->opcode_base; ++i)
10202 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
10206 /* Read directory table. */
10207 while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL)
10209 line_ptr += bytes_read;
10210 add_include_dir (lh, cur_dir);
10212 line_ptr += bytes_read;
10214 /* Read file name table. */
10215 while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL)
10217 unsigned int dir_index, mod_time, length;
10219 line_ptr += bytes_read;
10220 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10221 line_ptr += bytes_read;
10222 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10223 line_ptr += bytes_read;
10224 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10225 line_ptr += bytes_read;
10227 add_file_name (lh, cur_file, dir_index, mod_time, length);
10229 line_ptr += bytes_read;
10230 lh->statement_program_start = line_ptr;
10232 if (line_ptr > (dwarf2_per_objfile->line.buffer
10233 + dwarf2_per_objfile->line.size))
10234 complaint (&symfile_complaints,
10235 _("line number info header doesn't "
10236 "fit in `.debug_line' section"));
10238 discard_cleanups (back_to);
10242 /* This function exists to work around a bug in certain compilers
10243 (particularly GCC 2.95), in which the first line number marker of a
10244 function does not show up until after the prologue, right before
10245 the second line number marker. This function shifts ADDRESS down
10246 to the beginning of the function if necessary, and is called on
10247 addresses passed to record_line. */
10250 check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu)
10252 struct function_range *fn;
10254 /* Find the function_range containing address. */
10258 if (!cu->cached_fn)
10259 cu->cached_fn = cu->first_fn;
10261 fn = cu->cached_fn;
10263 if (fn->lowpc <= address && fn->highpc > address)
10269 while (fn && fn != cu->cached_fn)
10270 if (fn->lowpc <= address && fn->highpc > address)
10280 if (address != fn->lowpc)
10281 complaint (&symfile_complaints,
10282 _("misplaced first line number at 0x%lx for '%s'"),
10283 (unsigned long) address, fn->name);
10288 /* Subroutine of dwarf_decode_lines to simplify it.
10289 Return the file name of the psymtab for included file FILE_INDEX
10290 in line header LH of PST.
10291 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
10292 If space for the result is malloc'd, it will be freed by a cleanup.
10293 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
10296 psymtab_include_file_name (const struct line_header *lh, int file_index,
10297 const struct partial_symtab *pst,
10298 const char *comp_dir)
10300 const struct file_entry fe = lh->file_names [file_index];
10301 char *include_name = fe.name;
10302 char *include_name_to_compare = include_name;
10303 char *dir_name = NULL;
10304 const char *pst_filename;
10305 char *copied_name = NULL;
10309 dir_name = lh->include_dirs[fe.dir_index - 1];
10311 if (!IS_ABSOLUTE_PATH (include_name)
10312 && (dir_name != NULL || comp_dir != NULL))
10314 /* Avoid creating a duplicate psymtab for PST.
10315 We do this by comparing INCLUDE_NAME and PST_FILENAME.
10316 Before we do the comparison, however, we need to account
10317 for DIR_NAME and COMP_DIR.
10318 First prepend dir_name (if non-NULL). If we still don't
10319 have an absolute path prepend comp_dir (if non-NULL).
10320 However, the directory we record in the include-file's
10321 psymtab does not contain COMP_DIR (to match the
10322 corresponding symtab(s)).
10327 bash$ gcc -g ./hello.c
10328 include_name = "hello.c"
10330 DW_AT_comp_dir = comp_dir = "/tmp"
10331 DW_AT_name = "./hello.c" */
10333 if (dir_name != NULL)
10335 include_name = concat (dir_name, SLASH_STRING,
10336 include_name, (char *)NULL);
10337 include_name_to_compare = include_name;
10338 make_cleanup (xfree, include_name);
10340 if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL)
10342 include_name_to_compare = concat (comp_dir, SLASH_STRING,
10343 include_name, (char *)NULL);
10347 pst_filename = pst->filename;
10348 if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
10350 copied_name = concat (pst->dirname, SLASH_STRING,
10351 pst_filename, (char *)NULL);
10352 pst_filename = copied_name;
10355 file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0;
10357 if (include_name_to_compare != include_name)
10358 xfree (include_name_to_compare);
10359 if (copied_name != NULL)
10360 xfree (copied_name);
10364 return include_name;
10367 /* Ignore this record_line request. */
10370 noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc)
10375 /* Decode the Line Number Program (LNP) for the given line_header
10376 structure and CU. The actual information extracted and the type
10377 of structures created from the LNP depends on the value of PST.
10379 1. If PST is NULL, then this procedure uses the data from the program
10380 to create all necessary symbol tables, and their linetables.
10382 2. If PST is not NULL, this procedure reads the program to determine
10383 the list of files included by the unit represented by PST, and
10384 builds all the associated partial symbol tables.
10386 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
10387 It is used for relative paths in the line table.
10388 NOTE: When processing partial symtabs (pst != NULL),
10389 comp_dir == pst->dirname.
10391 NOTE: It is important that psymtabs have the same file name (via strcmp)
10392 as the corresponding symtab. Since COMP_DIR is not used in the name of the
10393 symtab we don't use it in the name of the psymtabs we create.
10394 E.g. expand_line_sal requires this when finding psymtabs to expand.
10395 A good testcase for this is mb-inline.exp. */
10398 dwarf_decode_lines (struct line_header *lh, const char *comp_dir, bfd *abfd,
10399 struct dwarf2_cu *cu, struct partial_symtab *pst)
10401 gdb_byte *line_ptr, *extended_end;
10402 gdb_byte *line_end;
10403 unsigned int bytes_read, extended_len;
10404 unsigned char op_code, extended_op, adj_opcode;
10405 CORE_ADDR baseaddr;
10406 struct objfile *objfile = cu->objfile;
10407 struct gdbarch *gdbarch = get_objfile_arch (objfile);
10408 const int decode_for_pst_p = (pst != NULL);
10409 struct subfile *last_subfile = NULL, *first_subfile = current_subfile;
10410 void (*p_record_line) (struct subfile *subfile, int line, CORE_ADDR pc)
10413 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
10415 line_ptr = lh->statement_program_start;
10416 line_end = lh->statement_program_end;
10418 /* Read the statement sequences until there's nothing left. */
10419 while (line_ptr < line_end)
10421 /* state machine registers */
10422 CORE_ADDR address = 0;
10423 unsigned int file = 1;
10424 unsigned int line = 1;
10425 unsigned int column = 0;
10426 int is_stmt = lh->default_is_stmt;
10427 int basic_block = 0;
10428 int end_sequence = 0;
10430 unsigned char op_index = 0;
10432 if (!decode_for_pst_p && lh->num_file_names >= file)
10434 /* Start a subfile for the current file of the state machine. */
10435 /* lh->include_dirs and lh->file_names are 0-based, but the
10436 directory and file name numbers in the statement program
10438 struct file_entry *fe = &lh->file_names[file - 1];
10442 dir = lh->include_dirs[fe->dir_index - 1];
10444 dwarf2_start_subfile (fe->name, dir, comp_dir);
10447 /* Decode the table. */
10448 while (!end_sequence)
10450 op_code = read_1_byte (abfd, line_ptr);
10452 if (line_ptr > line_end)
10454 dwarf2_debug_line_missing_end_sequence_complaint ();
10458 if (op_code >= lh->opcode_base)
10460 /* Special operand. */
10461 adj_opcode = op_code - lh->opcode_base;
10462 address += (((op_index + (adj_opcode / lh->line_range))
10463 / lh->maximum_ops_per_instruction)
10464 * lh->minimum_instruction_length);
10465 op_index = ((op_index + (adj_opcode / lh->line_range))
10466 % lh->maximum_ops_per_instruction);
10467 line += lh->line_base + (adj_opcode % lh->line_range);
10468 if (lh->num_file_names < file || file == 0)
10469 dwarf2_debug_line_missing_file_complaint ();
10470 /* For now we ignore lines not starting on an
10471 instruction boundary. */
10472 else if (op_index == 0)
10474 lh->file_names[file - 1].included_p = 1;
10475 if (!decode_for_pst_p && is_stmt)
10477 if (last_subfile != current_subfile)
10479 addr = gdbarch_addr_bits_remove (gdbarch, address);
10481 (*p_record_line) (last_subfile, 0, addr);
10482 last_subfile = current_subfile;
10484 /* Append row to matrix using current values. */
10485 addr = check_cu_functions (address, cu);
10486 addr = gdbarch_addr_bits_remove (gdbarch, addr);
10487 (*p_record_line) (current_subfile, line, addr);
10492 else switch (op_code)
10494 case DW_LNS_extended_op:
10495 extended_len = read_unsigned_leb128 (abfd, line_ptr,
10497 line_ptr += bytes_read;
10498 extended_end = line_ptr + extended_len;
10499 extended_op = read_1_byte (abfd, line_ptr);
10501 switch (extended_op)
10503 case DW_LNE_end_sequence:
10504 p_record_line = record_line;
10507 case DW_LNE_set_address:
10508 address = read_address (abfd, line_ptr, cu, &bytes_read);
10510 if (address == 0 && !dwarf2_per_objfile->has_section_at_zero)
10512 /* This line table is for a function which has been
10513 GCd by the linker. Ignore it. PR gdb/12528 */
10516 = line_ptr - dwarf2_per_objfile->line.buffer;
10518 complaint (&symfile_complaints,
10519 _(".debug_line address at offset 0x%lx is 0 "
10521 line_offset, cu->objfile->name);
10522 p_record_line = noop_record_line;
10526 line_ptr += bytes_read;
10527 address += baseaddr;
10529 case DW_LNE_define_file:
10532 unsigned int dir_index, mod_time, length;
10534 cur_file = read_direct_string (abfd, line_ptr,
10536 line_ptr += bytes_read;
10538 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10539 line_ptr += bytes_read;
10541 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10542 line_ptr += bytes_read;
10544 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10545 line_ptr += bytes_read;
10546 add_file_name (lh, cur_file, dir_index, mod_time, length);
10549 case DW_LNE_set_discriminator:
10550 /* The discriminator is not interesting to the debugger;
10552 line_ptr = extended_end;
10555 complaint (&symfile_complaints,
10556 _("mangled .debug_line section"));
10559 /* Make sure that we parsed the extended op correctly. If e.g.
10560 we expected a different address size than the producer used,
10561 we may have read the wrong number of bytes. */
10562 if (line_ptr != extended_end)
10564 complaint (&symfile_complaints,
10565 _("mangled .debug_line section"));
10570 if (lh->num_file_names < file || file == 0)
10571 dwarf2_debug_line_missing_file_complaint ();
10574 lh->file_names[file - 1].included_p = 1;
10575 if (!decode_for_pst_p && is_stmt)
10577 if (last_subfile != current_subfile)
10579 addr = gdbarch_addr_bits_remove (gdbarch, address);
10581 (*p_record_line) (last_subfile, 0, addr);
10582 last_subfile = current_subfile;
10584 addr = check_cu_functions (address, cu);
10585 addr = gdbarch_addr_bits_remove (gdbarch, addr);
10586 (*p_record_line) (current_subfile, line, addr);
10591 case DW_LNS_advance_pc:
10594 = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10596 address += (((op_index + adjust)
10597 / lh->maximum_ops_per_instruction)
10598 * lh->minimum_instruction_length);
10599 op_index = ((op_index + adjust)
10600 % lh->maximum_ops_per_instruction);
10601 line_ptr += bytes_read;
10604 case DW_LNS_advance_line:
10605 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
10606 line_ptr += bytes_read;
10608 case DW_LNS_set_file:
10610 /* The arrays lh->include_dirs and lh->file_names are
10611 0-based, but the directory and file name numbers in
10612 the statement program are 1-based. */
10613 struct file_entry *fe;
10616 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10617 line_ptr += bytes_read;
10618 if (lh->num_file_names < file || file == 0)
10619 dwarf2_debug_line_missing_file_complaint ();
10622 fe = &lh->file_names[file - 1];
10624 dir = lh->include_dirs[fe->dir_index - 1];
10625 if (!decode_for_pst_p)
10627 last_subfile = current_subfile;
10628 dwarf2_start_subfile (fe->name, dir, comp_dir);
10633 case DW_LNS_set_column:
10634 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10635 line_ptr += bytes_read;
10637 case DW_LNS_negate_stmt:
10638 is_stmt = (!is_stmt);
10640 case DW_LNS_set_basic_block:
10643 /* Add to the address register of the state machine the
10644 address increment value corresponding to special opcode
10645 255. I.e., this value is scaled by the minimum
10646 instruction length since special opcode 255 would have
10647 scaled the increment. */
10648 case DW_LNS_const_add_pc:
10650 CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range;
10652 address += (((op_index + adjust)
10653 / lh->maximum_ops_per_instruction)
10654 * lh->minimum_instruction_length);
10655 op_index = ((op_index + adjust)
10656 % lh->maximum_ops_per_instruction);
10659 case DW_LNS_fixed_advance_pc:
10660 address += read_2_bytes (abfd, line_ptr);
10666 /* Unknown standard opcode, ignore it. */
10669 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
10671 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10672 line_ptr += bytes_read;
10677 if (lh->num_file_names < file || file == 0)
10678 dwarf2_debug_line_missing_file_complaint ();
10681 lh->file_names[file - 1].included_p = 1;
10682 if (!decode_for_pst_p)
10684 addr = gdbarch_addr_bits_remove (gdbarch, address);
10685 (*p_record_line) (current_subfile, 0, addr);
10690 if (decode_for_pst_p)
10694 /* Now that we're done scanning the Line Header Program, we can
10695 create the psymtab of each included file. */
10696 for (file_index = 0; file_index < lh->num_file_names; file_index++)
10697 if (lh->file_names[file_index].included_p == 1)
10699 char *include_name =
10700 psymtab_include_file_name (lh, file_index, pst, comp_dir);
10701 if (include_name != NULL)
10702 dwarf2_create_include_psymtab (include_name, pst, objfile);
10707 /* Make sure a symtab is created for every file, even files
10708 which contain only variables (i.e. no code with associated
10712 struct file_entry *fe;
10714 for (i = 0; i < lh->num_file_names; i++)
10718 fe = &lh->file_names[i];
10720 dir = lh->include_dirs[fe->dir_index - 1];
10721 dwarf2_start_subfile (fe->name, dir, comp_dir);
10723 /* Skip the main file; we don't need it, and it must be
10724 allocated last, so that it will show up before the
10725 non-primary symtabs in the objfile's symtab list. */
10726 if (current_subfile == first_subfile)
10729 if (current_subfile->symtab == NULL)
10730 current_subfile->symtab = allocate_symtab (current_subfile->name,
10732 fe->symtab = current_subfile->symtab;
10737 /* Start a subfile for DWARF. FILENAME is the name of the file and
10738 DIRNAME the name of the source directory which contains FILENAME
10739 or NULL if not known. COMP_DIR is the compilation directory for the
10740 linetable's compilation unit or NULL if not known.
10741 This routine tries to keep line numbers from identical absolute and
10742 relative file names in a common subfile.
10744 Using the `list' example from the GDB testsuite, which resides in
10745 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
10746 of /srcdir/list0.c yields the following debugging information for list0.c:
10748 DW_AT_name: /srcdir/list0.c
10749 DW_AT_comp_dir: /compdir
10750 files.files[0].name: list0.h
10751 files.files[0].dir: /srcdir
10752 files.files[1].name: list0.c
10753 files.files[1].dir: /srcdir
10755 The line number information for list0.c has to end up in a single
10756 subfile, so that `break /srcdir/list0.c:1' works as expected.
10757 start_subfile will ensure that this happens provided that we pass the
10758 concatenation of files.files[1].dir and files.files[1].name as the
10762 dwarf2_start_subfile (char *filename, const char *dirname,
10763 const char *comp_dir)
10767 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
10768 `start_symtab' will always pass the contents of DW_AT_comp_dir as
10769 second argument to start_subfile. To be consistent, we do the
10770 same here. In order not to lose the line information directory,
10771 we concatenate it to the filename when it makes sense.
10772 Note that the Dwarf3 standard says (speaking of filenames in line
10773 information): ``The directory index is ignored for file names
10774 that represent full path names''. Thus ignoring dirname in the
10775 `else' branch below isn't an issue. */
10777 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
10778 fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
10780 fullname = filename;
10782 start_subfile (fullname, comp_dir);
10784 if (fullname != filename)
10789 var_decode_location (struct attribute *attr, struct symbol *sym,
10790 struct dwarf2_cu *cu)
10792 struct objfile *objfile = cu->objfile;
10793 struct comp_unit_head *cu_header = &cu->header;
10795 /* NOTE drow/2003-01-30: There used to be a comment and some special
10796 code here to turn a symbol with DW_AT_external and a
10797 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
10798 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
10799 with some versions of binutils) where shared libraries could have
10800 relocations against symbols in their debug information - the
10801 minimal symbol would have the right address, but the debug info
10802 would not. It's no longer necessary, because we will explicitly
10803 apply relocations when we read in the debug information now. */
10805 /* A DW_AT_location attribute with no contents indicates that a
10806 variable has been optimized away. */
10807 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
10809 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
10813 /* Handle one degenerate form of location expression specially, to
10814 preserve GDB's previous behavior when section offsets are
10815 specified. If this is just a DW_OP_addr then mark this symbol
10818 if (attr_form_is_block (attr)
10819 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
10820 && DW_BLOCK (attr)->data[0] == DW_OP_addr)
10822 unsigned int dummy;
10824 SYMBOL_VALUE_ADDRESS (sym) =
10825 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
10826 SYMBOL_CLASS (sym) = LOC_STATIC;
10827 fixup_symbol_section (sym, objfile);
10828 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
10829 SYMBOL_SECTION (sym));
10833 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
10834 expression evaluator, and use LOC_COMPUTED only when necessary
10835 (i.e. when the value of a register or memory location is
10836 referenced, or a thread-local block, etc.). Then again, it might
10837 not be worthwhile. I'm assuming that it isn't unless performance
10838 or memory numbers show me otherwise. */
10840 dwarf2_symbol_mark_computed (attr, sym, cu);
10841 SYMBOL_CLASS (sym) = LOC_COMPUTED;
10844 /* Given a pointer to a DWARF information entry, figure out if we need
10845 to make a symbol table entry for it, and if so, create a new entry
10846 and return a pointer to it.
10847 If TYPE is NULL, determine symbol type from the die, otherwise
10848 used the passed type.
10849 If SPACE is not NULL, use it to hold the new symbol. If it is
10850 NULL, allocate a new symbol on the objfile's obstack. */
10852 static struct symbol *
10853 new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu,
10854 struct symbol *space)
10856 struct objfile *objfile = cu->objfile;
10857 struct symbol *sym = NULL;
10859 struct attribute *attr = NULL;
10860 struct attribute *attr2 = NULL;
10861 CORE_ADDR baseaddr;
10862 struct pending **list_to_add = NULL;
10864 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
10866 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
10868 name = dwarf2_name (die, cu);
10871 const char *linkagename;
10872 int suppress_add = 0;
10877 sym = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol);
10878 OBJSTAT (objfile, n_syms++);
10880 /* Cache this symbol's name and the name's demangled form (if any). */
10881 SYMBOL_SET_LANGUAGE (sym, cu->language);
10882 linkagename = dwarf2_physname (name, die, cu);
10883 SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile);
10885 /* Fortran does not have mangling standard and the mangling does differ
10886 between gfortran, iFort etc. */
10887 if (cu->language == language_fortran
10888 && symbol_get_demangled_name (&(sym->ginfo)) == NULL)
10889 symbol_set_demangled_name (&(sym->ginfo),
10890 (char *) dwarf2_full_name (name, die, cu),
10893 /* Default assumptions.
10894 Use the passed type or decode it from the die. */
10895 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
10896 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
10898 SYMBOL_TYPE (sym) = type;
10900 SYMBOL_TYPE (sym) = die_type (die, cu);
10901 attr = dwarf2_attr (die,
10902 inlined_func ? DW_AT_call_line : DW_AT_decl_line,
10906 SYMBOL_LINE (sym) = DW_UNSND (attr);
10909 attr = dwarf2_attr (die,
10910 inlined_func ? DW_AT_call_file : DW_AT_decl_file,
10914 int file_index = DW_UNSND (attr);
10916 if (cu->line_header == NULL
10917 || file_index > cu->line_header->num_file_names)
10918 complaint (&symfile_complaints,
10919 _("file index out of range"));
10920 else if (file_index > 0)
10922 struct file_entry *fe;
10924 fe = &cu->line_header->file_names[file_index - 1];
10925 SYMBOL_SYMTAB (sym) = fe->symtab;
10932 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
10935 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
10937 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr;
10938 SYMBOL_DOMAIN (sym) = LABEL_DOMAIN;
10939 SYMBOL_CLASS (sym) = LOC_LABEL;
10940 add_symbol_to_list (sym, cu->list_in_scope);
10942 case DW_TAG_subprogram:
10943 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10945 SYMBOL_CLASS (sym) = LOC_BLOCK;
10946 attr2 = dwarf2_attr (die, DW_AT_external, cu);
10947 if ((attr2 && (DW_UNSND (attr2) != 0))
10948 || cu->language == language_ada)
10950 /* Subprograms marked external are stored as a global symbol.
10951 Ada subprograms, whether marked external or not, are always
10952 stored as a global symbol, because we want to be able to
10953 access them globally. For instance, we want to be able
10954 to break on a nested subprogram without having to
10955 specify the context. */
10956 list_to_add = &global_symbols;
10960 list_to_add = cu->list_in_scope;
10963 case DW_TAG_inlined_subroutine:
10964 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10966 SYMBOL_CLASS (sym) = LOC_BLOCK;
10967 SYMBOL_INLINED (sym) = 1;
10968 /* Do not add the symbol to any lists. It will be found via
10969 BLOCK_FUNCTION from the blockvector. */
10971 case DW_TAG_template_value_param:
10973 /* Fall through. */
10974 case DW_TAG_constant:
10975 case DW_TAG_variable:
10976 case DW_TAG_member:
10977 /* Compilation with minimal debug info may result in
10978 variables with missing type entries. Change the
10979 misleading `void' type to something sensible. */
10980 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
10982 = objfile_type (objfile)->nodebug_data_symbol;
10984 attr = dwarf2_attr (die, DW_AT_const_value, cu);
10985 /* In the case of DW_TAG_member, we should only be called for
10986 static const members. */
10987 if (die->tag == DW_TAG_member)
10989 /* dwarf2_add_field uses die_is_declaration,
10990 so we do the same. */
10991 gdb_assert (die_is_declaration (die, cu));
10996 dwarf2_const_value (attr, sym, cu);
10997 attr2 = dwarf2_attr (die, DW_AT_external, cu);
11000 if (attr2 && (DW_UNSND (attr2) != 0))
11001 list_to_add = &global_symbols;
11003 list_to_add = cu->list_in_scope;
11007 attr = dwarf2_attr (die, DW_AT_location, cu);
11010 var_decode_location (attr, sym, cu);
11011 attr2 = dwarf2_attr (die, DW_AT_external, cu);
11012 if (SYMBOL_CLASS (sym) == LOC_STATIC
11013 && SYMBOL_VALUE_ADDRESS (sym) == 0
11014 && !dwarf2_per_objfile->has_section_at_zero)
11016 /* When a static variable is eliminated by the linker,
11017 the corresponding debug information is not stripped
11018 out, but the variable address is set to null;
11019 do not add such variables into symbol table. */
11021 else if (attr2 && (DW_UNSND (attr2) != 0))
11023 /* Workaround gfortran PR debug/40040 - it uses
11024 DW_AT_location for variables in -fPIC libraries which may
11025 get overriden by other libraries/executable and get
11026 a different address. Resolve it by the minimal symbol
11027 which may come from inferior's executable using copy
11028 relocation. Make this workaround only for gfortran as for
11029 other compilers GDB cannot guess the minimal symbol
11030 Fortran mangling kind. */
11031 if (cu->language == language_fortran && die->parent
11032 && die->parent->tag == DW_TAG_module
11034 && strncmp (cu->producer, "GNU Fortran ", 12) == 0)
11035 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
11037 /* A variable with DW_AT_external is never static,
11038 but it may be block-scoped. */
11039 list_to_add = (cu->list_in_scope == &file_symbols
11040 ? &global_symbols : cu->list_in_scope);
11043 list_to_add = cu->list_in_scope;
11047 /* We do not know the address of this symbol.
11048 If it is an external symbol and we have type information
11049 for it, enter the symbol as a LOC_UNRESOLVED symbol.
11050 The address of the variable will then be determined from
11051 the minimal symbol table whenever the variable is
11053 attr2 = dwarf2_attr (die, DW_AT_external, cu);
11054 if (attr2 && (DW_UNSND (attr2) != 0)
11055 && dwarf2_attr (die, DW_AT_type, cu) != NULL)
11057 /* A variable with DW_AT_external is never static, but it
11058 may be block-scoped. */
11059 list_to_add = (cu->list_in_scope == &file_symbols
11060 ? &global_symbols : cu->list_in_scope);
11062 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
11064 else if (!die_is_declaration (die, cu))
11066 /* Use the default LOC_OPTIMIZED_OUT class. */
11067 gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT);
11069 list_to_add = cu->list_in_scope;
11073 case DW_TAG_formal_parameter:
11074 /* If we are inside a function, mark this as an argument. If
11075 not, we might be looking at an argument to an inlined function
11076 when we do not have enough information to show inlined frames;
11077 pretend it's a local variable in that case so that the user can
11079 if (context_stack_depth > 0
11080 && context_stack[context_stack_depth - 1].name != NULL)
11081 SYMBOL_IS_ARGUMENT (sym) = 1;
11082 attr = dwarf2_attr (die, DW_AT_location, cu);
11085 var_decode_location (attr, sym, cu);
11087 attr = dwarf2_attr (die, DW_AT_const_value, cu);
11090 dwarf2_const_value (attr, sym, cu);
11092 attr = dwarf2_attr (die, DW_AT_variable_parameter, cu);
11093 if (attr && DW_UNSND (attr))
11095 struct type *ref_type;
11097 ref_type = lookup_reference_type (SYMBOL_TYPE (sym));
11098 SYMBOL_TYPE (sym) = ref_type;
11101 list_to_add = cu->list_in_scope;
11103 case DW_TAG_unspecified_parameters:
11104 /* From varargs functions; gdb doesn't seem to have any
11105 interest in this information, so just ignore it for now.
11108 case DW_TAG_template_type_param:
11110 /* Fall through. */
11111 case DW_TAG_class_type:
11112 case DW_TAG_interface_type:
11113 case DW_TAG_structure_type:
11114 case DW_TAG_union_type:
11115 case DW_TAG_set_type:
11116 case DW_TAG_enumeration_type:
11117 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
11118 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
11121 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
11122 really ever be static objects: otherwise, if you try
11123 to, say, break of a class's method and you're in a file
11124 which doesn't mention that class, it won't work unless
11125 the check for all static symbols in lookup_symbol_aux
11126 saves you. See the OtherFileClass tests in
11127 gdb.c++/namespace.exp. */
11131 list_to_add = (cu->list_in_scope == &file_symbols
11132 && (cu->language == language_cplus
11133 || cu->language == language_java)
11134 ? &global_symbols : cu->list_in_scope);
11136 /* The semantics of C++ state that "struct foo {
11137 ... }" also defines a typedef for "foo". A Java
11138 class declaration also defines a typedef for the
11140 if (cu->language == language_cplus
11141 || cu->language == language_java
11142 || cu->language == language_ada)
11144 /* The symbol's name is already allocated along
11145 with this objfile, so we don't need to
11146 duplicate it for the type. */
11147 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
11148 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
11153 case DW_TAG_typedef:
11154 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
11155 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
11156 list_to_add = cu->list_in_scope;
11158 case DW_TAG_base_type:
11159 case DW_TAG_subrange_type:
11160 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
11161 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
11162 list_to_add = cu->list_in_scope;
11164 case DW_TAG_enumerator:
11165 attr = dwarf2_attr (die, DW_AT_const_value, cu);
11168 dwarf2_const_value (attr, sym, cu);
11171 /* NOTE: carlton/2003-11-10: See comment above in the
11172 DW_TAG_class_type, etc. block. */
11174 list_to_add = (cu->list_in_scope == &file_symbols
11175 && (cu->language == language_cplus
11176 || cu->language == language_java)
11177 ? &global_symbols : cu->list_in_scope);
11180 case DW_TAG_namespace:
11181 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
11182 list_to_add = &global_symbols;
11185 /* Not a tag we recognize. Hopefully we aren't processing
11186 trash data, but since we must specifically ignore things
11187 we don't recognize, there is nothing else we should do at
11189 complaint (&symfile_complaints, _("unsupported tag: '%s'"),
11190 dwarf_tag_name (die->tag));
11196 sym->hash_next = objfile->template_symbols;
11197 objfile->template_symbols = sym;
11198 list_to_add = NULL;
11201 if (list_to_add != NULL)
11202 add_symbol_to_list (sym, list_to_add);
11204 /* For the benefit of old versions of GCC, check for anonymous
11205 namespaces based on the demangled name. */
11206 if (!processing_has_namespace_info
11207 && cu->language == language_cplus)
11208 cp_scan_for_anonymous_namespaces (sym);
11213 /* A wrapper for new_symbol_full that always allocates a new symbol. */
11215 static struct symbol *
11216 new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
11218 return new_symbol_full (die, type, cu, NULL);
11221 /* Given an attr with a DW_FORM_dataN value in host byte order,
11222 zero-extend it as appropriate for the symbol's type. The DWARF
11223 standard (v4) is not entirely clear about the meaning of using
11224 DW_FORM_dataN for a constant with a signed type, where the type is
11225 wider than the data. The conclusion of a discussion on the DWARF
11226 list was that this is unspecified. We choose to always zero-extend
11227 because that is the interpretation long in use by GCC. */
11230 dwarf2_const_value_data (struct attribute *attr, struct type *type,
11231 const char *name, struct obstack *obstack,
11232 struct dwarf2_cu *cu, long *value, int bits)
11234 struct objfile *objfile = cu->objfile;
11235 enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ?
11236 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
11237 LONGEST l = DW_UNSND (attr);
11239 if (bits < sizeof (*value) * 8)
11241 l &= ((LONGEST) 1 << bits) - 1;
11244 else if (bits == sizeof (*value) * 8)
11248 gdb_byte *bytes = obstack_alloc (obstack, bits / 8);
11249 store_unsigned_integer (bytes, bits / 8, byte_order, l);
11256 /* Read a constant value from an attribute. Either set *VALUE, or if
11257 the value does not fit in *VALUE, set *BYTES - either already
11258 allocated on the objfile obstack, or newly allocated on OBSTACK,
11259 or, set *BATON, if we translated the constant to a location
11263 dwarf2_const_value_attr (struct attribute *attr, struct type *type,
11264 const char *name, struct obstack *obstack,
11265 struct dwarf2_cu *cu,
11266 long *value, gdb_byte **bytes,
11267 struct dwarf2_locexpr_baton **baton)
11269 struct objfile *objfile = cu->objfile;
11270 struct comp_unit_head *cu_header = &cu->header;
11271 struct dwarf_block *blk;
11272 enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ?
11273 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE);
11279 switch (attr->form)
11285 if (TYPE_LENGTH (type) != cu_header->addr_size)
11286 dwarf2_const_value_length_mismatch_complaint (name,
11287 cu_header->addr_size,
11288 TYPE_LENGTH (type));
11289 /* Symbols of this form are reasonably rare, so we just
11290 piggyback on the existing location code rather than writing
11291 a new implementation of symbol_computed_ops. */
11292 *baton = obstack_alloc (&objfile->objfile_obstack,
11293 sizeof (struct dwarf2_locexpr_baton));
11294 (*baton)->per_cu = cu->per_cu;
11295 gdb_assert ((*baton)->per_cu);
11297 (*baton)->size = 2 + cu_header->addr_size;
11298 data = obstack_alloc (&objfile->objfile_obstack, (*baton)->size);
11299 (*baton)->data = data;
11301 data[0] = DW_OP_addr;
11302 store_unsigned_integer (&data[1], cu_header->addr_size,
11303 byte_order, DW_ADDR (attr));
11304 data[cu_header->addr_size + 1] = DW_OP_stack_value;
11307 case DW_FORM_string:
11309 /* DW_STRING is already allocated on the objfile obstack, point
11311 *bytes = (gdb_byte *) DW_STRING (attr);
11313 case DW_FORM_block1:
11314 case DW_FORM_block2:
11315 case DW_FORM_block4:
11316 case DW_FORM_block:
11317 case DW_FORM_exprloc:
11318 blk = DW_BLOCK (attr);
11319 if (TYPE_LENGTH (type) != blk->size)
11320 dwarf2_const_value_length_mismatch_complaint (name, blk->size,
11321 TYPE_LENGTH (type));
11322 *bytes = blk->data;
11325 /* The DW_AT_const_value attributes are supposed to carry the
11326 symbol's value "represented as it would be on the target
11327 architecture." By the time we get here, it's already been
11328 converted to host endianness, so we just need to sign- or
11329 zero-extend it as appropriate. */
11330 case DW_FORM_data1:
11331 *bytes = dwarf2_const_value_data (attr, type, name,
11332 obstack, cu, value, 8);
11334 case DW_FORM_data2:
11335 *bytes = dwarf2_const_value_data (attr, type, name,
11336 obstack, cu, value, 16);
11338 case DW_FORM_data4:
11339 *bytes = dwarf2_const_value_data (attr, type, name,
11340 obstack, cu, value, 32);
11342 case DW_FORM_data8:
11343 *bytes = dwarf2_const_value_data (attr, type, name,
11344 obstack, cu, value, 64);
11347 case DW_FORM_sdata:
11348 *value = DW_SND (attr);
11351 case DW_FORM_udata:
11352 *value = DW_UNSND (attr);
11356 complaint (&symfile_complaints,
11357 _("unsupported const value attribute form: '%s'"),
11358 dwarf_form_name (attr->form));
11365 /* Copy constant value from an attribute to a symbol. */
11368 dwarf2_const_value (struct attribute *attr, struct symbol *sym,
11369 struct dwarf2_cu *cu)
11371 struct objfile *objfile = cu->objfile;
11372 struct comp_unit_head *cu_header = &cu->header;
11375 struct dwarf2_locexpr_baton *baton;
11377 dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym),
11378 SYMBOL_PRINT_NAME (sym),
11379 &objfile->objfile_obstack, cu,
11380 &value, &bytes, &baton);
11384 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
11385 SYMBOL_LOCATION_BATON (sym) = baton;
11386 SYMBOL_CLASS (sym) = LOC_COMPUTED;
11388 else if (bytes != NULL)
11390 SYMBOL_VALUE_BYTES (sym) = bytes;
11391 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
11395 SYMBOL_VALUE (sym) = value;
11396 SYMBOL_CLASS (sym) = LOC_CONST;
11400 /* Return the type of the die in question using its DW_AT_type attribute. */
11402 static struct type *
11403 die_type (struct die_info *die, struct dwarf2_cu *cu)
11405 struct attribute *type_attr;
11407 type_attr = dwarf2_attr (die, DW_AT_type, cu);
11410 /* A missing DW_AT_type represents a void type. */
11411 return objfile_type (cu->objfile)->builtin_void;
11414 return lookup_die_type (die, type_attr, cu);
11417 /* True iff CU's producer generates GNAT Ada auxiliary information
11418 that allows to find parallel types through that information instead
11419 of having to do expensive parallel lookups by type name. */
11422 need_gnat_info (struct dwarf2_cu *cu)
11424 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
11425 of GNAT produces this auxiliary information, without any indication
11426 that it is produced. Part of enhancing the FSF version of GNAT
11427 to produce that information will be to put in place an indicator
11428 that we can use in order to determine whether the descriptive type
11429 info is available or not. One suggestion that has been made is
11430 to use a new attribute, attached to the CU die. For now, assume
11431 that the descriptive type info is not available. */
11435 /* Return the auxiliary type of the die in question using its
11436 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
11437 attribute is not present. */
11439 static struct type *
11440 die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu)
11442 struct attribute *type_attr;
11444 type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu);
11448 return lookup_die_type (die, type_attr, cu);
11451 /* If DIE has a descriptive_type attribute, then set the TYPE's
11452 descriptive type accordingly. */
11455 set_descriptive_type (struct type *type, struct die_info *die,
11456 struct dwarf2_cu *cu)
11458 struct type *descriptive_type = die_descriptive_type (die, cu);
11460 if (descriptive_type)
11462 ALLOCATE_GNAT_AUX_TYPE (type);
11463 TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type;
11467 /* Return the containing type of the die in question using its
11468 DW_AT_containing_type attribute. */
11470 static struct type *
11471 die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
11473 struct attribute *type_attr;
11475 type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
11477 error (_("Dwarf Error: Problem turning containing type into gdb type "
11478 "[in module %s]"), cu->objfile->name);
11480 return lookup_die_type (die, type_attr, cu);
11483 /* Look up the type of DIE in CU using its type attribute ATTR.
11484 If there is no type substitute an error marker. */
11486 static struct type *
11487 lookup_die_type (struct die_info *die, struct attribute *attr,
11488 struct dwarf2_cu *cu)
11490 struct type *this_type;
11492 /* First see if we have it cached. */
11494 if (is_ref_attr (attr))
11496 unsigned int offset = dwarf2_get_ref_die_offset (attr);
11498 this_type = get_die_type_at_offset (offset, cu->per_cu);
11500 else if (attr->form == DW_FORM_sig8)
11502 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
11503 struct dwarf2_cu *sig_cu;
11504 unsigned int offset;
11506 /* sig_type will be NULL if the signatured type is missing from
11508 if (sig_type == NULL)
11509 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
11510 "at 0x%x [in module %s]"),
11511 die->offset, cu->objfile->name);
11513 gdb_assert (sig_type->per_cu.from_debug_types);
11514 offset = sig_type->offset + sig_type->type_offset;
11515 this_type = get_die_type_at_offset (offset, &sig_type->per_cu);
11519 dump_die_for_error (die);
11520 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
11521 dwarf_attr_name (attr->name), cu->objfile->name);
11524 /* If not cached we need to read it in. */
11526 if (this_type == NULL)
11528 struct die_info *type_die;
11529 struct dwarf2_cu *type_cu = cu;
11531 type_die = follow_die_ref_or_sig (die, attr, &type_cu);
11532 /* If the type is cached, we should have found it above. */
11533 gdb_assert (get_die_type (type_die, type_cu) == NULL);
11534 this_type = read_type_die_1 (type_die, type_cu);
11537 /* If we still don't have a type use an error marker. */
11539 if (this_type == NULL)
11541 char *message, *saved;
11543 /* read_type_die already issued a complaint. */
11544 message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
11548 saved = obstack_copy0 (&cu->objfile->objfile_obstack,
11549 message, strlen (message));
11552 this_type = init_type (TYPE_CODE_ERROR, 0, 0, saved, cu->objfile);
11558 /* Return the type in DIE, CU.
11559 Returns NULL for invalid types.
11561 This first does a lookup in the appropriate type_hash table,
11562 and only reads the die in if necessary.
11564 NOTE: This can be called when reading in partial or full symbols. */
11566 static struct type *
11567 read_type_die (struct die_info *die, struct dwarf2_cu *cu)
11569 struct type *this_type;
11571 this_type = get_die_type (die, cu);
11575 return read_type_die_1 (die, cu);
11578 /* Read the type in DIE, CU.
11579 Returns NULL for invalid types. */
11581 static struct type *
11582 read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu)
11584 struct type *this_type = NULL;
11588 case DW_TAG_class_type:
11589 case DW_TAG_interface_type:
11590 case DW_TAG_structure_type:
11591 case DW_TAG_union_type:
11592 this_type = read_structure_type (die, cu);
11594 case DW_TAG_enumeration_type:
11595 this_type = read_enumeration_type (die, cu);
11597 case DW_TAG_subprogram:
11598 case DW_TAG_subroutine_type:
11599 case DW_TAG_inlined_subroutine:
11600 this_type = read_subroutine_type (die, cu);
11602 case DW_TAG_array_type:
11603 this_type = read_array_type (die, cu);
11605 case DW_TAG_set_type:
11606 this_type = read_set_type (die, cu);
11608 case DW_TAG_pointer_type:
11609 this_type = read_tag_pointer_type (die, cu);
11611 case DW_TAG_ptr_to_member_type:
11612 this_type = read_tag_ptr_to_member_type (die, cu);
11614 case DW_TAG_reference_type:
11615 this_type = read_tag_reference_type (die, cu);
11617 case DW_TAG_const_type:
11618 this_type = read_tag_const_type (die, cu);
11620 case DW_TAG_volatile_type:
11621 this_type = read_tag_volatile_type (die, cu);
11623 case DW_TAG_string_type:
11624 this_type = read_tag_string_type (die, cu);
11626 case DW_TAG_typedef:
11627 this_type = read_typedef (die, cu);
11629 case DW_TAG_subrange_type:
11630 this_type = read_subrange_type (die, cu);
11632 case DW_TAG_base_type:
11633 this_type = read_base_type (die, cu);
11635 case DW_TAG_unspecified_type:
11636 this_type = read_unspecified_type (die, cu);
11638 case DW_TAG_namespace:
11639 this_type = read_namespace_type (die, cu);
11641 case DW_TAG_module:
11642 this_type = read_module_type (die, cu);
11645 complaint (&symfile_complaints,
11646 _("unexpected tag in read_type_die: '%s'"),
11647 dwarf_tag_name (die->tag));
11654 /* See if we can figure out if the class lives in a namespace. We do
11655 this by looking for a member function; its demangled name will
11656 contain namespace info, if there is any.
11657 Return the computed name or NULL.
11658 Space for the result is allocated on the objfile's obstack.
11659 This is the full-die version of guess_partial_die_structure_name.
11660 In this case we know DIE has no useful parent. */
11663 guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu)
11665 struct die_info *spec_die;
11666 struct dwarf2_cu *spec_cu;
11667 struct die_info *child;
11670 spec_die = die_specification (die, &spec_cu);
11671 if (spec_die != NULL)
11677 for (child = die->child;
11679 child = child->sibling)
11681 if (child->tag == DW_TAG_subprogram)
11683 struct attribute *attr;
11685 attr = dwarf2_attr (child, DW_AT_linkage_name, cu);
11687 attr = dwarf2_attr (child, DW_AT_MIPS_linkage_name, cu);
11691 = language_class_name_from_physname (cu->language_defn,
11695 if (actual_name != NULL)
11697 char *die_name = dwarf2_name (die, cu);
11699 if (die_name != NULL
11700 && strcmp (die_name, actual_name) != 0)
11702 /* Strip off the class name from the full name.
11703 We want the prefix. */
11704 int die_name_len = strlen (die_name);
11705 int actual_name_len = strlen (actual_name);
11707 /* Test for '::' as a sanity check. */
11708 if (actual_name_len > die_name_len + 2
11709 && actual_name[actual_name_len
11710 - die_name_len - 1] == ':')
11712 obsavestring (actual_name,
11713 actual_name_len - die_name_len - 2,
11714 &cu->objfile->objfile_obstack);
11717 xfree (actual_name);
11726 /* Return the name of the namespace/class that DIE is defined within,
11727 or "" if we can't tell. The caller should not xfree the result.
11729 For example, if we're within the method foo() in the following
11739 then determine_prefix on foo's die will return "N::C". */
11742 determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
11744 struct die_info *parent, *spec_die;
11745 struct dwarf2_cu *spec_cu;
11746 struct type *parent_type;
11748 if (cu->language != language_cplus && cu->language != language_java
11749 && cu->language != language_fortran)
11752 /* We have to be careful in the presence of DW_AT_specification.
11753 For example, with GCC 3.4, given the code
11757 // Definition of N::foo.
11761 then we'll have a tree of DIEs like this:
11763 1: DW_TAG_compile_unit
11764 2: DW_TAG_namespace // N
11765 3: DW_TAG_subprogram // declaration of N::foo
11766 4: DW_TAG_subprogram // definition of N::foo
11767 DW_AT_specification // refers to die #3
11769 Thus, when processing die #4, we have to pretend that we're in
11770 the context of its DW_AT_specification, namely the contex of die
11773 spec_die = die_specification (die, &spec_cu);
11774 if (spec_die == NULL)
11775 parent = die->parent;
11778 parent = spec_die->parent;
11782 if (parent == NULL)
11784 else if (parent->building_fullname)
11787 const char *parent_name;
11789 /* It has been seen on RealView 2.2 built binaries,
11790 DW_TAG_template_type_param types actually _defined_ as
11791 children of the parent class:
11794 template class <class Enum> Class{};
11795 Class<enum E> class_e;
11797 1: DW_TAG_class_type (Class)
11798 2: DW_TAG_enumeration_type (E)
11799 3: DW_TAG_enumerator (enum1:0)
11800 3: DW_TAG_enumerator (enum2:1)
11802 2: DW_TAG_template_type_param
11803 DW_AT_type DW_FORM_ref_udata (E)
11805 Besides being broken debug info, it can put GDB into an
11806 infinite loop. Consider:
11808 When we're building the full name for Class<E>, we'll start
11809 at Class, and go look over its template type parameters,
11810 finding E. We'll then try to build the full name of E, and
11811 reach here. We're now trying to build the full name of E,
11812 and look over the parent DIE for containing scope. In the
11813 broken case, if we followed the parent DIE of E, we'd again
11814 find Class, and once again go look at its template type
11815 arguments, etc., etc. Simply don't consider such parent die
11816 as source-level parent of this die (it can't be, the language
11817 doesn't allow it), and break the loop here. */
11818 name = dwarf2_name (die, cu);
11819 parent_name = dwarf2_name (parent, cu);
11820 complaint (&symfile_complaints,
11821 _("template param type '%s' defined within parent '%s'"),
11822 name ? name : "<unknown>",
11823 parent_name ? parent_name : "<unknown>");
11827 switch (parent->tag)
11829 case DW_TAG_namespace:
11830 parent_type = read_type_die (parent, cu);
11831 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
11832 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
11833 Work around this problem here. */
11834 if (cu->language == language_cplus
11835 && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0)
11837 /* We give a name to even anonymous namespaces. */
11838 return TYPE_TAG_NAME (parent_type);
11839 case DW_TAG_class_type:
11840 case DW_TAG_interface_type:
11841 case DW_TAG_structure_type:
11842 case DW_TAG_union_type:
11843 case DW_TAG_module:
11844 parent_type = read_type_die (parent, cu);
11845 if (TYPE_TAG_NAME (parent_type) != NULL)
11846 return TYPE_TAG_NAME (parent_type);
11848 /* An anonymous structure is only allowed non-static data
11849 members; no typedefs, no member functions, et cetera.
11850 So it does not need a prefix. */
11852 case DW_TAG_compile_unit:
11853 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
11854 if (cu->language == language_cplus
11855 && dwarf2_per_objfile->types.asection != NULL
11856 && die->child != NULL
11857 && (die->tag == DW_TAG_class_type
11858 || die->tag == DW_TAG_structure_type
11859 || die->tag == DW_TAG_union_type))
11861 char *name = guess_full_die_structure_name (die, cu);
11867 return determine_prefix (parent, cu);
11871 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
11872 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
11873 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
11874 an obconcat, otherwise allocate storage for the result. The CU argument is
11875 used to determine the language and hence, the appropriate separator. */
11877 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
11880 typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
11881 int physname, struct dwarf2_cu *cu)
11883 const char *lead = "";
11886 if (suffix == NULL || suffix[0] == '\0'
11887 || prefix == NULL || prefix[0] == '\0')
11889 else if (cu->language == language_java)
11891 else if (cu->language == language_fortran && physname)
11893 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
11894 DW_AT_MIPS_linkage_name is preferred and used instead. */
11902 if (prefix == NULL)
11904 if (suffix == NULL)
11910 = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
11912 strcpy (retval, lead);
11913 strcat (retval, prefix);
11914 strcat (retval, sep);
11915 strcat (retval, suffix);
11920 /* We have an obstack. */
11921 return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL);
11925 /* Return sibling of die, NULL if no sibling. */
11927 static struct die_info *
11928 sibling_die (struct die_info *die)
11930 return die->sibling;
11933 /* Get name of a die, return NULL if not found. */
11936 dwarf2_canonicalize_name (char *name, struct dwarf2_cu *cu,
11937 struct obstack *obstack)
11939 if (name && cu->language == language_cplus)
11941 char *canon_name = cp_canonicalize_string (name);
11943 if (canon_name != NULL)
11945 if (strcmp (canon_name, name) != 0)
11946 name = obsavestring (canon_name, strlen (canon_name),
11948 xfree (canon_name);
11955 /* Get name of a die, return NULL if not found. */
11958 dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
11960 struct attribute *attr;
11962 attr = dwarf2_attr (die, DW_AT_name, cu);
11963 if (!attr || !DW_STRING (attr))
11968 case DW_TAG_compile_unit:
11969 /* Compilation units have a DW_AT_name that is a filename, not
11970 a source language identifier. */
11971 case DW_TAG_enumeration_type:
11972 case DW_TAG_enumerator:
11973 /* These tags always have simple identifiers already; no need
11974 to canonicalize them. */
11975 return DW_STRING (attr);
11977 case DW_TAG_subprogram:
11978 /* Java constructors will all be named "<init>", so return
11979 the class name when we see this special case. */
11980 if (cu->language == language_java
11981 && DW_STRING (attr) != NULL
11982 && strcmp (DW_STRING (attr), "<init>") == 0)
11984 struct dwarf2_cu *spec_cu = cu;
11985 struct die_info *spec_die;
11987 /* GCJ will output '<init>' for Java constructor names.
11988 For this special case, return the name of the parent class. */
11990 /* GCJ may output suprogram DIEs with AT_specification set.
11991 If so, use the name of the specified DIE. */
11992 spec_die = die_specification (die, &spec_cu);
11993 if (spec_die != NULL)
11994 return dwarf2_name (spec_die, spec_cu);
11999 if (die->tag == DW_TAG_class_type)
12000 return dwarf2_name (die, cu);
12002 while (die->tag != DW_TAG_compile_unit);
12006 case DW_TAG_class_type:
12007 case DW_TAG_interface_type:
12008 case DW_TAG_structure_type:
12009 case DW_TAG_union_type:
12010 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
12011 structures or unions. These were of the form "._%d" in GCC 4.1,
12012 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
12013 and GCC 4.4. We work around this problem by ignoring these. */
12014 if (strncmp (DW_STRING (attr), "._", 2) == 0
12015 || strncmp (DW_STRING (attr), "<anonymous", 10) == 0)
12023 if (!DW_STRING_IS_CANONICAL (attr))
12026 = dwarf2_canonicalize_name (DW_STRING (attr), cu,
12027 &cu->objfile->objfile_obstack);
12028 DW_STRING_IS_CANONICAL (attr) = 1;
12030 return DW_STRING (attr);
12033 /* Return the die that this die in an extension of, or NULL if there
12034 is none. *EXT_CU is the CU containing DIE on input, and the CU
12035 containing the return value on output. */
12037 static struct die_info *
12038 dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu)
12040 struct attribute *attr;
12042 attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
12046 return follow_die_ref (die, attr, ext_cu);
12049 /* Convert a DIE tag into its string name. */
12052 dwarf_tag_name (unsigned tag)
12056 case DW_TAG_padding:
12057 return "DW_TAG_padding";
12058 case DW_TAG_array_type:
12059 return "DW_TAG_array_type";
12060 case DW_TAG_class_type:
12061 return "DW_TAG_class_type";
12062 case DW_TAG_entry_point:
12063 return "DW_TAG_entry_point";
12064 case DW_TAG_enumeration_type:
12065 return "DW_TAG_enumeration_type";
12066 case DW_TAG_formal_parameter:
12067 return "DW_TAG_formal_parameter";
12068 case DW_TAG_imported_declaration:
12069 return "DW_TAG_imported_declaration";
12071 return "DW_TAG_label";
12072 case DW_TAG_lexical_block:
12073 return "DW_TAG_lexical_block";
12074 case DW_TAG_member:
12075 return "DW_TAG_member";
12076 case DW_TAG_pointer_type:
12077 return "DW_TAG_pointer_type";
12078 case DW_TAG_reference_type:
12079 return "DW_TAG_reference_type";
12080 case DW_TAG_compile_unit:
12081 return "DW_TAG_compile_unit";
12082 case DW_TAG_string_type:
12083 return "DW_TAG_string_type";
12084 case DW_TAG_structure_type:
12085 return "DW_TAG_structure_type";
12086 case DW_TAG_subroutine_type:
12087 return "DW_TAG_subroutine_type";
12088 case DW_TAG_typedef:
12089 return "DW_TAG_typedef";
12090 case DW_TAG_union_type:
12091 return "DW_TAG_union_type";
12092 case DW_TAG_unspecified_parameters:
12093 return "DW_TAG_unspecified_parameters";
12094 case DW_TAG_variant:
12095 return "DW_TAG_variant";
12096 case DW_TAG_common_block:
12097 return "DW_TAG_common_block";
12098 case DW_TAG_common_inclusion:
12099 return "DW_TAG_common_inclusion";
12100 case DW_TAG_inheritance:
12101 return "DW_TAG_inheritance";
12102 case DW_TAG_inlined_subroutine:
12103 return "DW_TAG_inlined_subroutine";
12104 case DW_TAG_module:
12105 return "DW_TAG_module";
12106 case DW_TAG_ptr_to_member_type:
12107 return "DW_TAG_ptr_to_member_type";
12108 case DW_TAG_set_type:
12109 return "DW_TAG_set_type";
12110 case DW_TAG_subrange_type:
12111 return "DW_TAG_subrange_type";
12112 case DW_TAG_with_stmt:
12113 return "DW_TAG_with_stmt";
12114 case DW_TAG_access_declaration:
12115 return "DW_TAG_access_declaration";
12116 case DW_TAG_base_type:
12117 return "DW_TAG_base_type";
12118 case DW_TAG_catch_block:
12119 return "DW_TAG_catch_block";
12120 case DW_TAG_const_type:
12121 return "DW_TAG_const_type";
12122 case DW_TAG_constant:
12123 return "DW_TAG_constant";
12124 case DW_TAG_enumerator:
12125 return "DW_TAG_enumerator";
12126 case DW_TAG_file_type:
12127 return "DW_TAG_file_type";
12128 case DW_TAG_friend:
12129 return "DW_TAG_friend";
12130 case DW_TAG_namelist:
12131 return "DW_TAG_namelist";
12132 case DW_TAG_namelist_item:
12133 return "DW_TAG_namelist_item";
12134 case DW_TAG_packed_type:
12135 return "DW_TAG_packed_type";
12136 case DW_TAG_subprogram:
12137 return "DW_TAG_subprogram";
12138 case DW_TAG_template_type_param:
12139 return "DW_TAG_template_type_param";
12140 case DW_TAG_template_value_param:
12141 return "DW_TAG_template_value_param";
12142 case DW_TAG_thrown_type:
12143 return "DW_TAG_thrown_type";
12144 case DW_TAG_try_block:
12145 return "DW_TAG_try_block";
12146 case DW_TAG_variant_part:
12147 return "DW_TAG_variant_part";
12148 case DW_TAG_variable:
12149 return "DW_TAG_variable";
12150 case DW_TAG_volatile_type:
12151 return "DW_TAG_volatile_type";
12152 case DW_TAG_dwarf_procedure:
12153 return "DW_TAG_dwarf_procedure";
12154 case DW_TAG_restrict_type:
12155 return "DW_TAG_restrict_type";
12156 case DW_TAG_interface_type:
12157 return "DW_TAG_interface_type";
12158 case DW_TAG_namespace:
12159 return "DW_TAG_namespace";
12160 case DW_TAG_imported_module:
12161 return "DW_TAG_imported_module";
12162 case DW_TAG_unspecified_type:
12163 return "DW_TAG_unspecified_type";
12164 case DW_TAG_partial_unit:
12165 return "DW_TAG_partial_unit";
12166 case DW_TAG_imported_unit:
12167 return "DW_TAG_imported_unit";
12168 case DW_TAG_condition:
12169 return "DW_TAG_condition";
12170 case DW_TAG_shared_type:
12171 return "DW_TAG_shared_type";
12172 case DW_TAG_type_unit:
12173 return "DW_TAG_type_unit";
12174 case DW_TAG_MIPS_loop:
12175 return "DW_TAG_MIPS_loop";
12176 case DW_TAG_HP_array_descriptor:
12177 return "DW_TAG_HP_array_descriptor";
12178 case DW_TAG_format_label:
12179 return "DW_TAG_format_label";
12180 case DW_TAG_function_template:
12181 return "DW_TAG_function_template";
12182 case DW_TAG_class_template:
12183 return "DW_TAG_class_template";
12184 case DW_TAG_GNU_BINCL:
12185 return "DW_TAG_GNU_BINCL";
12186 case DW_TAG_GNU_EINCL:
12187 return "DW_TAG_GNU_EINCL";
12188 case DW_TAG_upc_shared_type:
12189 return "DW_TAG_upc_shared_type";
12190 case DW_TAG_upc_strict_type:
12191 return "DW_TAG_upc_strict_type";
12192 case DW_TAG_upc_relaxed_type:
12193 return "DW_TAG_upc_relaxed_type";
12194 case DW_TAG_PGI_kanji_type:
12195 return "DW_TAG_PGI_kanji_type";
12196 case DW_TAG_PGI_interface_block:
12197 return "DW_TAG_PGI_interface_block";
12199 return "DW_TAG_<unknown>";
12203 /* Convert a DWARF attribute code into its string name. */
12206 dwarf_attr_name (unsigned attr)
12210 case DW_AT_sibling:
12211 return "DW_AT_sibling";
12212 case DW_AT_location:
12213 return "DW_AT_location";
12215 return "DW_AT_name";
12216 case DW_AT_ordering:
12217 return "DW_AT_ordering";
12218 case DW_AT_subscr_data:
12219 return "DW_AT_subscr_data";
12220 case DW_AT_byte_size:
12221 return "DW_AT_byte_size";
12222 case DW_AT_bit_offset:
12223 return "DW_AT_bit_offset";
12224 case DW_AT_bit_size:
12225 return "DW_AT_bit_size";
12226 case DW_AT_element_list:
12227 return "DW_AT_element_list";
12228 case DW_AT_stmt_list:
12229 return "DW_AT_stmt_list";
12231 return "DW_AT_low_pc";
12232 case DW_AT_high_pc:
12233 return "DW_AT_high_pc";
12234 case DW_AT_language:
12235 return "DW_AT_language";
12237 return "DW_AT_member";
12239 return "DW_AT_discr";
12240 case DW_AT_discr_value:
12241 return "DW_AT_discr_value";
12242 case DW_AT_visibility:
12243 return "DW_AT_visibility";
12245 return "DW_AT_import";
12246 case DW_AT_string_length:
12247 return "DW_AT_string_length";
12248 case DW_AT_common_reference:
12249 return "DW_AT_common_reference";
12250 case DW_AT_comp_dir:
12251 return "DW_AT_comp_dir";
12252 case DW_AT_const_value:
12253 return "DW_AT_const_value";
12254 case DW_AT_containing_type:
12255 return "DW_AT_containing_type";
12256 case DW_AT_default_value:
12257 return "DW_AT_default_value";
12259 return "DW_AT_inline";
12260 case DW_AT_is_optional:
12261 return "DW_AT_is_optional";
12262 case DW_AT_lower_bound:
12263 return "DW_AT_lower_bound";
12264 case DW_AT_producer:
12265 return "DW_AT_producer";
12266 case DW_AT_prototyped:
12267 return "DW_AT_prototyped";
12268 case DW_AT_return_addr:
12269 return "DW_AT_return_addr";
12270 case DW_AT_start_scope:
12271 return "DW_AT_start_scope";
12272 case DW_AT_bit_stride:
12273 return "DW_AT_bit_stride";
12274 case DW_AT_upper_bound:
12275 return "DW_AT_upper_bound";
12276 case DW_AT_abstract_origin:
12277 return "DW_AT_abstract_origin";
12278 case DW_AT_accessibility:
12279 return "DW_AT_accessibility";
12280 case DW_AT_address_class:
12281 return "DW_AT_address_class";
12282 case DW_AT_artificial:
12283 return "DW_AT_artificial";
12284 case DW_AT_base_types:
12285 return "DW_AT_base_types";
12286 case DW_AT_calling_convention:
12287 return "DW_AT_calling_convention";
12289 return "DW_AT_count";
12290 case DW_AT_data_member_location:
12291 return "DW_AT_data_member_location";
12292 case DW_AT_decl_column:
12293 return "DW_AT_decl_column";
12294 case DW_AT_decl_file:
12295 return "DW_AT_decl_file";
12296 case DW_AT_decl_line:
12297 return "DW_AT_decl_line";
12298 case DW_AT_declaration:
12299 return "DW_AT_declaration";
12300 case DW_AT_discr_list:
12301 return "DW_AT_discr_list";
12302 case DW_AT_encoding:
12303 return "DW_AT_encoding";
12304 case DW_AT_external:
12305 return "DW_AT_external";
12306 case DW_AT_frame_base:
12307 return "DW_AT_frame_base";
12309 return "DW_AT_friend";
12310 case DW_AT_identifier_case:
12311 return "DW_AT_identifier_case";
12312 case DW_AT_macro_info:
12313 return "DW_AT_macro_info";
12314 case DW_AT_namelist_items:
12315 return "DW_AT_namelist_items";
12316 case DW_AT_priority:
12317 return "DW_AT_priority";
12318 case DW_AT_segment:
12319 return "DW_AT_segment";
12320 case DW_AT_specification:
12321 return "DW_AT_specification";
12322 case DW_AT_static_link:
12323 return "DW_AT_static_link";
12325 return "DW_AT_type";
12326 case DW_AT_use_location:
12327 return "DW_AT_use_location";
12328 case DW_AT_variable_parameter:
12329 return "DW_AT_variable_parameter";
12330 case DW_AT_virtuality:
12331 return "DW_AT_virtuality";
12332 case DW_AT_vtable_elem_location:
12333 return "DW_AT_vtable_elem_location";
12334 /* DWARF 3 values. */
12335 case DW_AT_allocated:
12336 return "DW_AT_allocated";
12337 case DW_AT_associated:
12338 return "DW_AT_associated";
12339 case DW_AT_data_location:
12340 return "DW_AT_data_location";
12341 case DW_AT_byte_stride:
12342 return "DW_AT_byte_stride";
12343 case DW_AT_entry_pc:
12344 return "DW_AT_entry_pc";
12345 case DW_AT_use_UTF8:
12346 return "DW_AT_use_UTF8";
12347 case DW_AT_extension:
12348 return "DW_AT_extension";
12350 return "DW_AT_ranges";
12351 case DW_AT_trampoline:
12352 return "DW_AT_trampoline";
12353 case DW_AT_call_column:
12354 return "DW_AT_call_column";
12355 case DW_AT_call_file:
12356 return "DW_AT_call_file";
12357 case DW_AT_call_line:
12358 return "DW_AT_call_line";
12359 case DW_AT_description:
12360 return "DW_AT_description";
12361 case DW_AT_binary_scale:
12362 return "DW_AT_binary_scale";
12363 case DW_AT_decimal_scale:
12364 return "DW_AT_decimal_scale";
12366 return "DW_AT_small";
12367 case DW_AT_decimal_sign:
12368 return "DW_AT_decimal_sign";
12369 case DW_AT_digit_count:
12370 return "DW_AT_digit_count";
12371 case DW_AT_picture_string:
12372 return "DW_AT_picture_string";
12373 case DW_AT_mutable:
12374 return "DW_AT_mutable";
12375 case DW_AT_threads_scaled:
12376 return "DW_AT_threads_scaled";
12377 case DW_AT_explicit:
12378 return "DW_AT_explicit";
12379 case DW_AT_object_pointer:
12380 return "DW_AT_object_pointer";
12381 case DW_AT_endianity:
12382 return "DW_AT_endianity";
12383 case DW_AT_elemental:
12384 return "DW_AT_elemental";
12386 return "DW_AT_pure";
12387 case DW_AT_recursive:
12388 return "DW_AT_recursive";
12389 /* DWARF 4 values. */
12390 case DW_AT_signature:
12391 return "DW_AT_signature";
12392 case DW_AT_linkage_name:
12393 return "DW_AT_linkage_name";
12394 /* SGI/MIPS extensions. */
12395 #ifdef MIPS /* collides with DW_AT_HP_block_index */
12396 case DW_AT_MIPS_fde:
12397 return "DW_AT_MIPS_fde";
12399 case DW_AT_MIPS_loop_begin:
12400 return "DW_AT_MIPS_loop_begin";
12401 case DW_AT_MIPS_tail_loop_begin:
12402 return "DW_AT_MIPS_tail_loop_begin";
12403 case DW_AT_MIPS_epilog_begin:
12404 return "DW_AT_MIPS_epilog_begin";
12405 case DW_AT_MIPS_loop_unroll_factor:
12406 return "DW_AT_MIPS_loop_unroll_factor";
12407 case DW_AT_MIPS_software_pipeline_depth:
12408 return "DW_AT_MIPS_software_pipeline_depth";
12409 case DW_AT_MIPS_linkage_name:
12410 return "DW_AT_MIPS_linkage_name";
12411 case DW_AT_MIPS_stride:
12412 return "DW_AT_MIPS_stride";
12413 case DW_AT_MIPS_abstract_name:
12414 return "DW_AT_MIPS_abstract_name";
12415 case DW_AT_MIPS_clone_origin:
12416 return "DW_AT_MIPS_clone_origin";
12417 case DW_AT_MIPS_has_inlines:
12418 return "DW_AT_MIPS_has_inlines";
12419 /* HP extensions. */
12420 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
12421 case DW_AT_HP_block_index:
12422 return "DW_AT_HP_block_index";
12424 case DW_AT_HP_unmodifiable:
12425 return "DW_AT_HP_unmodifiable";
12426 case DW_AT_HP_actuals_stmt_list:
12427 return "DW_AT_HP_actuals_stmt_list";
12428 case DW_AT_HP_proc_per_section:
12429 return "DW_AT_HP_proc_per_section";
12430 case DW_AT_HP_raw_data_ptr:
12431 return "DW_AT_HP_raw_data_ptr";
12432 case DW_AT_HP_pass_by_reference:
12433 return "DW_AT_HP_pass_by_reference";
12434 case DW_AT_HP_opt_level:
12435 return "DW_AT_HP_opt_level";
12436 case DW_AT_HP_prof_version_id:
12437 return "DW_AT_HP_prof_version_id";
12438 case DW_AT_HP_opt_flags:
12439 return "DW_AT_HP_opt_flags";
12440 case DW_AT_HP_cold_region_low_pc:
12441 return "DW_AT_HP_cold_region_low_pc";
12442 case DW_AT_HP_cold_region_high_pc:
12443 return "DW_AT_HP_cold_region_high_pc";
12444 case DW_AT_HP_all_variables_modifiable:
12445 return "DW_AT_HP_all_variables_modifiable";
12446 case DW_AT_HP_linkage_name:
12447 return "DW_AT_HP_linkage_name";
12448 case DW_AT_HP_prof_flags:
12449 return "DW_AT_HP_prof_flags";
12450 /* GNU extensions. */
12451 case DW_AT_sf_names:
12452 return "DW_AT_sf_names";
12453 case DW_AT_src_info:
12454 return "DW_AT_src_info";
12455 case DW_AT_mac_info:
12456 return "DW_AT_mac_info";
12457 case DW_AT_src_coords:
12458 return "DW_AT_src_coords";
12459 case DW_AT_body_begin:
12460 return "DW_AT_body_begin";
12461 case DW_AT_body_end:
12462 return "DW_AT_body_end";
12463 case DW_AT_GNU_vector:
12464 return "DW_AT_GNU_vector";
12465 case DW_AT_GNU_odr_signature:
12466 return "DW_AT_GNU_odr_signature";
12467 /* VMS extensions. */
12468 case DW_AT_VMS_rtnbeg_pd_address:
12469 return "DW_AT_VMS_rtnbeg_pd_address";
12470 /* UPC extension. */
12471 case DW_AT_upc_threads_scaled:
12472 return "DW_AT_upc_threads_scaled";
12473 /* PGI (STMicroelectronics) extensions. */
12474 case DW_AT_PGI_lbase:
12475 return "DW_AT_PGI_lbase";
12476 case DW_AT_PGI_soffset:
12477 return "DW_AT_PGI_soffset";
12478 case DW_AT_PGI_lstride:
12479 return "DW_AT_PGI_lstride";
12481 return "DW_AT_<unknown>";
12485 /* Convert a DWARF value form code into its string name. */
12488 dwarf_form_name (unsigned form)
12493 return "DW_FORM_addr";
12494 case DW_FORM_block2:
12495 return "DW_FORM_block2";
12496 case DW_FORM_block4:
12497 return "DW_FORM_block4";
12498 case DW_FORM_data2:
12499 return "DW_FORM_data2";
12500 case DW_FORM_data4:
12501 return "DW_FORM_data4";
12502 case DW_FORM_data8:
12503 return "DW_FORM_data8";
12504 case DW_FORM_string:
12505 return "DW_FORM_string";
12506 case DW_FORM_block:
12507 return "DW_FORM_block";
12508 case DW_FORM_block1:
12509 return "DW_FORM_block1";
12510 case DW_FORM_data1:
12511 return "DW_FORM_data1";
12513 return "DW_FORM_flag";
12514 case DW_FORM_sdata:
12515 return "DW_FORM_sdata";
12517 return "DW_FORM_strp";
12518 case DW_FORM_udata:
12519 return "DW_FORM_udata";
12520 case DW_FORM_ref_addr:
12521 return "DW_FORM_ref_addr";
12523 return "DW_FORM_ref1";
12525 return "DW_FORM_ref2";
12527 return "DW_FORM_ref4";
12529 return "DW_FORM_ref8";
12530 case DW_FORM_ref_udata:
12531 return "DW_FORM_ref_udata";
12532 case DW_FORM_indirect:
12533 return "DW_FORM_indirect";
12534 case DW_FORM_sec_offset:
12535 return "DW_FORM_sec_offset";
12536 case DW_FORM_exprloc:
12537 return "DW_FORM_exprloc";
12538 case DW_FORM_flag_present:
12539 return "DW_FORM_flag_present";
12541 return "DW_FORM_sig8";
12543 return "DW_FORM_<unknown>";
12547 /* Convert a DWARF stack opcode into its string name. */
12550 dwarf_stack_op_name (unsigned op)
12555 return "DW_OP_addr";
12557 return "DW_OP_deref";
12558 case DW_OP_const1u:
12559 return "DW_OP_const1u";
12560 case DW_OP_const1s:
12561 return "DW_OP_const1s";
12562 case DW_OP_const2u:
12563 return "DW_OP_const2u";
12564 case DW_OP_const2s:
12565 return "DW_OP_const2s";
12566 case DW_OP_const4u:
12567 return "DW_OP_const4u";
12568 case DW_OP_const4s:
12569 return "DW_OP_const4s";
12570 case DW_OP_const8u:
12571 return "DW_OP_const8u";
12572 case DW_OP_const8s:
12573 return "DW_OP_const8s";
12575 return "DW_OP_constu";
12577 return "DW_OP_consts";
12579 return "DW_OP_dup";
12581 return "DW_OP_drop";
12583 return "DW_OP_over";
12585 return "DW_OP_pick";
12587 return "DW_OP_swap";
12589 return "DW_OP_rot";
12591 return "DW_OP_xderef";
12593 return "DW_OP_abs";
12595 return "DW_OP_and";
12597 return "DW_OP_div";
12599 return "DW_OP_minus";
12601 return "DW_OP_mod";
12603 return "DW_OP_mul";
12605 return "DW_OP_neg";
12607 return "DW_OP_not";
12611 return "DW_OP_plus";
12612 case DW_OP_plus_uconst:
12613 return "DW_OP_plus_uconst";
12615 return "DW_OP_shl";
12617 return "DW_OP_shr";
12619 return "DW_OP_shra";
12621 return "DW_OP_xor";
12623 return "DW_OP_bra";
12637 return "DW_OP_skip";
12639 return "DW_OP_lit0";
12641 return "DW_OP_lit1";
12643 return "DW_OP_lit2";
12645 return "DW_OP_lit3";
12647 return "DW_OP_lit4";
12649 return "DW_OP_lit5";
12651 return "DW_OP_lit6";
12653 return "DW_OP_lit7";
12655 return "DW_OP_lit8";
12657 return "DW_OP_lit9";
12659 return "DW_OP_lit10";
12661 return "DW_OP_lit11";
12663 return "DW_OP_lit12";
12665 return "DW_OP_lit13";
12667 return "DW_OP_lit14";
12669 return "DW_OP_lit15";
12671 return "DW_OP_lit16";
12673 return "DW_OP_lit17";
12675 return "DW_OP_lit18";
12677 return "DW_OP_lit19";
12679 return "DW_OP_lit20";
12681 return "DW_OP_lit21";
12683 return "DW_OP_lit22";
12685 return "DW_OP_lit23";
12687 return "DW_OP_lit24";
12689 return "DW_OP_lit25";
12691 return "DW_OP_lit26";
12693 return "DW_OP_lit27";
12695 return "DW_OP_lit28";
12697 return "DW_OP_lit29";
12699 return "DW_OP_lit30";
12701 return "DW_OP_lit31";
12703 return "DW_OP_reg0";
12705 return "DW_OP_reg1";
12707 return "DW_OP_reg2";
12709 return "DW_OP_reg3";
12711 return "DW_OP_reg4";
12713 return "DW_OP_reg5";
12715 return "DW_OP_reg6";
12717 return "DW_OP_reg7";
12719 return "DW_OP_reg8";
12721 return "DW_OP_reg9";
12723 return "DW_OP_reg10";
12725 return "DW_OP_reg11";
12727 return "DW_OP_reg12";
12729 return "DW_OP_reg13";
12731 return "DW_OP_reg14";
12733 return "DW_OP_reg15";
12735 return "DW_OP_reg16";
12737 return "DW_OP_reg17";
12739 return "DW_OP_reg18";
12741 return "DW_OP_reg19";
12743 return "DW_OP_reg20";
12745 return "DW_OP_reg21";
12747 return "DW_OP_reg22";
12749 return "DW_OP_reg23";
12751 return "DW_OP_reg24";
12753 return "DW_OP_reg25";
12755 return "DW_OP_reg26";
12757 return "DW_OP_reg27";
12759 return "DW_OP_reg28";
12761 return "DW_OP_reg29";
12763 return "DW_OP_reg30";
12765 return "DW_OP_reg31";
12767 return "DW_OP_breg0";
12769 return "DW_OP_breg1";
12771 return "DW_OP_breg2";
12773 return "DW_OP_breg3";
12775 return "DW_OP_breg4";
12777 return "DW_OP_breg5";
12779 return "DW_OP_breg6";
12781 return "DW_OP_breg7";
12783 return "DW_OP_breg8";
12785 return "DW_OP_breg9";
12787 return "DW_OP_breg10";
12789 return "DW_OP_breg11";
12791 return "DW_OP_breg12";
12793 return "DW_OP_breg13";
12795 return "DW_OP_breg14";
12797 return "DW_OP_breg15";
12799 return "DW_OP_breg16";
12801 return "DW_OP_breg17";
12803 return "DW_OP_breg18";
12805 return "DW_OP_breg19";
12807 return "DW_OP_breg20";
12809 return "DW_OP_breg21";
12811 return "DW_OP_breg22";
12813 return "DW_OP_breg23";
12815 return "DW_OP_breg24";
12817 return "DW_OP_breg25";
12819 return "DW_OP_breg26";
12821 return "DW_OP_breg27";
12823 return "DW_OP_breg28";
12825 return "DW_OP_breg29";
12827 return "DW_OP_breg30";
12829 return "DW_OP_breg31";
12831 return "DW_OP_regx";
12833 return "DW_OP_fbreg";
12835 return "DW_OP_bregx";
12837 return "DW_OP_piece";
12838 case DW_OP_deref_size:
12839 return "DW_OP_deref_size";
12840 case DW_OP_xderef_size:
12841 return "DW_OP_xderef_size";
12843 return "DW_OP_nop";
12844 /* DWARF 3 extensions. */
12845 case DW_OP_push_object_address:
12846 return "DW_OP_push_object_address";
12848 return "DW_OP_call2";
12850 return "DW_OP_call4";
12851 case DW_OP_call_ref:
12852 return "DW_OP_call_ref";
12853 case DW_OP_form_tls_address:
12854 return "DW_OP_form_tls_address";
12855 case DW_OP_call_frame_cfa:
12856 return "DW_OP_call_frame_cfa";
12857 case DW_OP_bit_piece:
12858 return "DW_OP_bit_piece";
12859 /* DWARF 4 extensions. */
12860 case DW_OP_implicit_value:
12861 return "DW_OP_implicit_value";
12862 case DW_OP_stack_value:
12863 return "DW_OP_stack_value";
12864 /* GNU extensions. */
12865 case DW_OP_GNU_push_tls_address:
12866 return "DW_OP_GNU_push_tls_address";
12867 case DW_OP_GNU_uninit:
12868 return "DW_OP_GNU_uninit";
12869 case DW_OP_GNU_implicit_pointer:
12870 return "DW_OP_GNU_implicit_pointer";
12877 dwarf_bool_name (unsigned mybool)
12885 /* Convert a DWARF type code into its string name. */
12888 dwarf_type_encoding_name (unsigned enc)
12893 return "DW_ATE_void";
12894 case DW_ATE_address:
12895 return "DW_ATE_address";
12896 case DW_ATE_boolean:
12897 return "DW_ATE_boolean";
12898 case DW_ATE_complex_float:
12899 return "DW_ATE_complex_float";
12901 return "DW_ATE_float";
12902 case DW_ATE_signed:
12903 return "DW_ATE_signed";
12904 case DW_ATE_signed_char:
12905 return "DW_ATE_signed_char";
12906 case DW_ATE_unsigned:
12907 return "DW_ATE_unsigned";
12908 case DW_ATE_unsigned_char:
12909 return "DW_ATE_unsigned_char";
12911 case DW_ATE_imaginary_float:
12912 return "DW_ATE_imaginary_float";
12913 case DW_ATE_packed_decimal:
12914 return "DW_ATE_packed_decimal";
12915 case DW_ATE_numeric_string:
12916 return "DW_ATE_numeric_string";
12917 case DW_ATE_edited:
12918 return "DW_ATE_edited";
12919 case DW_ATE_signed_fixed:
12920 return "DW_ATE_signed_fixed";
12921 case DW_ATE_unsigned_fixed:
12922 return "DW_ATE_unsigned_fixed";
12923 case DW_ATE_decimal_float:
12924 return "DW_ATE_decimal_float";
12927 return "DW_ATE_UTF";
12928 /* HP extensions. */
12929 case DW_ATE_HP_float80:
12930 return "DW_ATE_HP_float80";
12931 case DW_ATE_HP_complex_float80:
12932 return "DW_ATE_HP_complex_float80";
12933 case DW_ATE_HP_float128:
12934 return "DW_ATE_HP_float128";
12935 case DW_ATE_HP_complex_float128:
12936 return "DW_ATE_HP_complex_float128";
12937 case DW_ATE_HP_floathpintel:
12938 return "DW_ATE_HP_floathpintel";
12939 case DW_ATE_HP_imaginary_float80:
12940 return "DW_ATE_HP_imaginary_float80";
12941 case DW_ATE_HP_imaginary_float128:
12942 return "DW_ATE_HP_imaginary_float128";
12944 return "DW_ATE_<unknown>";
12948 /* Convert a DWARF call frame info operation to its string name. */
12952 dwarf_cfi_name (unsigned cfi_opc)
12956 case DW_CFA_advance_loc:
12957 return "DW_CFA_advance_loc";
12958 case DW_CFA_offset:
12959 return "DW_CFA_offset";
12960 case DW_CFA_restore:
12961 return "DW_CFA_restore";
12963 return "DW_CFA_nop";
12964 case DW_CFA_set_loc:
12965 return "DW_CFA_set_loc";
12966 case DW_CFA_advance_loc1:
12967 return "DW_CFA_advance_loc1";
12968 case DW_CFA_advance_loc2:
12969 return "DW_CFA_advance_loc2";
12970 case DW_CFA_advance_loc4:
12971 return "DW_CFA_advance_loc4";
12972 case DW_CFA_offset_extended:
12973 return "DW_CFA_offset_extended";
12974 case DW_CFA_restore_extended:
12975 return "DW_CFA_restore_extended";
12976 case DW_CFA_undefined:
12977 return "DW_CFA_undefined";
12978 case DW_CFA_same_value:
12979 return "DW_CFA_same_value";
12980 case DW_CFA_register:
12981 return "DW_CFA_register";
12982 case DW_CFA_remember_state:
12983 return "DW_CFA_remember_state";
12984 case DW_CFA_restore_state:
12985 return "DW_CFA_restore_state";
12986 case DW_CFA_def_cfa:
12987 return "DW_CFA_def_cfa";
12988 case DW_CFA_def_cfa_register:
12989 return "DW_CFA_def_cfa_register";
12990 case DW_CFA_def_cfa_offset:
12991 return "DW_CFA_def_cfa_offset";
12993 case DW_CFA_def_cfa_expression:
12994 return "DW_CFA_def_cfa_expression";
12995 case DW_CFA_expression:
12996 return "DW_CFA_expression";
12997 case DW_CFA_offset_extended_sf:
12998 return "DW_CFA_offset_extended_sf";
12999 case DW_CFA_def_cfa_sf:
13000 return "DW_CFA_def_cfa_sf";
13001 case DW_CFA_def_cfa_offset_sf:
13002 return "DW_CFA_def_cfa_offset_sf";
13003 case DW_CFA_val_offset:
13004 return "DW_CFA_val_offset";
13005 case DW_CFA_val_offset_sf:
13006 return "DW_CFA_val_offset_sf";
13007 case DW_CFA_val_expression:
13008 return "DW_CFA_val_expression";
13009 /* SGI/MIPS specific. */
13010 case DW_CFA_MIPS_advance_loc8:
13011 return "DW_CFA_MIPS_advance_loc8";
13012 /* GNU extensions. */
13013 case DW_CFA_GNU_window_save:
13014 return "DW_CFA_GNU_window_save";
13015 case DW_CFA_GNU_args_size:
13016 return "DW_CFA_GNU_args_size";
13017 case DW_CFA_GNU_negative_offset_extended:
13018 return "DW_CFA_GNU_negative_offset_extended";
13020 return "DW_CFA_<unknown>";
13026 dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
13030 print_spaces (indent, f);
13031 fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n",
13032 dwarf_tag_name (die->tag), die->abbrev, die->offset);
13034 if (die->parent != NULL)
13036 print_spaces (indent, f);
13037 fprintf_unfiltered (f, " parent at offset: 0x%x\n",
13038 die->parent->offset);
13041 print_spaces (indent, f);
13042 fprintf_unfiltered (f, " has children: %s\n",
13043 dwarf_bool_name (die->child != NULL));
13045 print_spaces (indent, f);
13046 fprintf_unfiltered (f, " attributes:\n");
13048 for (i = 0; i < die->num_attrs; ++i)
13050 print_spaces (indent, f);
13051 fprintf_unfiltered (f, " %s (%s) ",
13052 dwarf_attr_name (die->attrs[i].name),
13053 dwarf_form_name (die->attrs[i].form));
13055 switch (die->attrs[i].form)
13057 case DW_FORM_ref_addr:
13059 fprintf_unfiltered (f, "address: ");
13060 fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f);
13062 case DW_FORM_block2:
13063 case DW_FORM_block4:
13064 case DW_FORM_block:
13065 case DW_FORM_block1:
13066 fprintf_unfiltered (f, "block: size %d",
13067 DW_BLOCK (&die->attrs[i])->size);
13069 case DW_FORM_exprloc:
13070 fprintf_unfiltered (f, "expression: size %u",
13071 DW_BLOCK (&die->attrs[i])->size);
13076 fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)",
13077 (long) (DW_ADDR (&die->attrs[i])));
13079 case DW_FORM_data1:
13080 case DW_FORM_data2:
13081 case DW_FORM_data4:
13082 case DW_FORM_data8:
13083 case DW_FORM_udata:
13084 case DW_FORM_sdata:
13085 fprintf_unfiltered (f, "constant: %s",
13086 pulongest (DW_UNSND (&die->attrs[i])));
13088 case DW_FORM_sec_offset:
13089 fprintf_unfiltered (f, "section offset: %s",
13090 pulongest (DW_UNSND (&die->attrs[i])));
13093 if (DW_SIGNATURED_TYPE (&die->attrs[i]) != NULL)
13094 fprintf_unfiltered (f, "signatured type, offset: 0x%x",
13095 DW_SIGNATURED_TYPE (&die->attrs[i])->offset);
13097 fprintf_unfiltered (f, "signatured type, offset: unknown");
13099 case DW_FORM_string:
13101 fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)",
13102 DW_STRING (&die->attrs[i])
13103 ? DW_STRING (&die->attrs[i]) : "",
13104 DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not");
13107 if (DW_UNSND (&die->attrs[i]))
13108 fprintf_unfiltered (f, "flag: TRUE");
13110 fprintf_unfiltered (f, "flag: FALSE");
13112 case DW_FORM_flag_present:
13113 fprintf_unfiltered (f, "flag: TRUE");
13115 case DW_FORM_indirect:
13116 /* The reader will have reduced the indirect form to
13117 the "base form" so this form should not occur. */
13118 fprintf_unfiltered (f,
13119 "unexpected attribute form: DW_FORM_indirect");
13122 fprintf_unfiltered (f, "unsupported attribute form: %d.",
13123 die->attrs[i].form);
13126 fprintf_unfiltered (f, "\n");
13131 dump_die_for_error (struct die_info *die)
13133 dump_die_shallow (gdb_stderr, 0, die);
13137 dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die)
13139 int indent = level * 4;
13141 gdb_assert (die != NULL);
13143 if (level >= max_level)
13146 dump_die_shallow (f, indent, die);
13148 if (die->child != NULL)
13150 print_spaces (indent, f);
13151 fprintf_unfiltered (f, " Children:");
13152 if (level + 1 < max_level)
13154 fprintf_unfiltered (f, "\n");
13155 dump_die_1 (f, level + 1, max_level, die->child);
13159 fprintf_unfiltered (f,
13160 " [not printed, max nesting level reached]\n");
13164 if (die->sibling != NULL && level > 0)
13166 dump_die_1 (f, level, max_level, die->sibling);
13170 /* This is called from the pdie macro in gdbinit.in.
13171 It's not static so gcc will keep a copy callable from gdb. */
13174 dump_die (struct die_info *die, int max_level)
13176 dump_die_1 (gdb_stdlog, 0, max_level, die);
13180 store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu)
13184 slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset, INSERT);
13190 is_ref_attr (struct attribute *attr)
13192 switch (attr->form)
13194 case DW_FORM_ref_addr:
13199 case DW_FORM_ref_udata:
13206 static unsigned int
13207 dwarf2_get_ref_die_offset (struct attribute *attr)
13209 if (is_ref_attr (attr))
13210 return DW_ADDR (attr);
13212 complaint (&symfile_complaints,
13213 _("unsupported die ref attribute form: '%s'"),
13214 dwarf_form_name (attr->form));
13218 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
13219 * the value held by the attribute is not constant. */
13222 dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
13224 if (attr->form == DW_FORM_sdata)
13225 return DW_SND (attr);
13226 else if (attr->form == DW_FORM_udata
13227 || attr->form == DW_FORM_data1
13228 || attr->form == DW_FORM_data2
13229 || attr->form == DW_FORM_data4
13230 || attr->form == DW_FORM_data8)
13231 return DW_UNSND (attr);
13234 complaint (&symfile_complaints,
13235 _("Attribute value is not a constant (%s)"),
13236 dwarf_form_name (attr->form));
13237 return default_value;
13241 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
13242 unit and add it to our queue.
13243 The result is non-zero if PER_CU was queued, otherwise the result is zero
13244 meaning either PER_CU is already queued or it is already loaded. */
13247 maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
13248 struct dwarf2_per_cu_data *per_cu)
13250 /* We may arrive here during partial symbol reading, if we need full
13251 DIEs to process an unusual case (e.g. template arguments). Do
13252 not queue PER_CU, just tell our caller to load its DIEs. */
13253 if (dwarf2_per_objfile->reading_partial_symbols)
13255 if (per_cu->cu == NULL || per_cu->cu->dies == NULL)
13260 /* Mark the dependence relation so that we don't flush PER_CU
13262 dwarf2_add_dependence (this_cu, per_cu);
13264 /* If it's already on the queue, we have nothing to do. */
13265 if (per_cu->queued)
13268 /* If the compilation unit is already loaded, just mark it as
13270 if (per_cu->cu != NULL)
13272 per_cu->cu->last_used = 0;
13276 /* Add it to the queue. */
13277 queue_comp_unit (per_cu, this_cu->objfile);
13282 /* Follow reference or signature attribute ATTR of SRC_DIE.
13283 On entry *REF_CU is the CU of SRC_DIE.
13284 On exit *REF_CU is the CU of the result. */
13286 static struct die_info *
13287 follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr,
13288 struct dwarf2_cu **ref_cu)
13290 struct die_info *die;
13292 if (is_ref_attr (attr))
13293 die = follow_die_ref (src_die, attr, ref_cu);
13294 else if (attr->form == DW_FORM_sig8)
13295 die = follow_die_sig (src_die, attr, ref_cu);
13298 dump_die_for_error (src_die);
13299 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
13300 (*ref_cu)->objfile->name);
13306 /* Follow reference OFFSET.
13307 On entry *REF_CU is the CU of the source die referencing OFFSET.
13308 On exit *REF_CU is the CU of the result.
13309 Returns NULL if OFFSET is invalid. */
13311 static struct die_info *
13312 follow_die_offset (unsigned int offset, struct dwarf2_cu **ref_cu)
13314 struct die_info temp_die;
13315 struct dwarf2_cu *target_cu, *cu = *ref_cu;
13317 gdb_assert (cu->per_cu != NULL);
13321 if (cu->per_cu->from_debug_types)
13323 /* .debug_types CUs cannot reference anything outside their CU.
13324 If they need to, they have to reference a signatured type via
13326 if (! offset_in_cu_p (&cu->header, offset))
13329 else if (! offset_in_cu_p (&cu->header, offset))
13331 struct dwarf2_per_cu_data *per_cu;
13333 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
13335 /* If necessary, add it to the queue and load its DIEs. */
13336 if (maybe_queue_comp_unit (cu, per_cu))
13337 load_full_comp_unit (per_cu, cu->objfile);
13339 target_cu = per_cu->cu;
13341 else if (cu->dies == NULL)
13343 /* We're loading full DIEs during partial symbol reading. */
13344 gdb_assert (dwarf2_per_objfile->reading_partial_symbols);
13345 load_full_comp_unit (cu->per_cu, cu->objfile);
13348 *ref_cu = target_cu;
13349 temp_die.offset = offset;
13350 return htab_find_with_hash (target_cu->die_hash, &temp_die, offset);
13353 /* Follow reference attribute ATTR of SRC_DIE.
13354 On entry *REF_CU is the CU of SRC_DIE.
13355 On exit *REF_CU is the CU of the result. */
13357 static struct die_info *
13358 follow_die_ref (struct die_info *src_die, struct attribute *attr,
13359 struct dwarf2_cu **ref_cu)
13361 unsigned int offset = dwarf2_get_ref_die_offset (attr);
13362 struct dwarf2_cu *cu = *ref_cu;
13363 struct die_info *die;
13365 die = follow_die_offset (offset, ref_cu);
13367 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
13368 "at 0x%x [in module %s]"),
13369 offset, src_die->offset, cu->objfile->name);
13374 /* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
13375 value is intended for DW_OP_call*. */
13377 struct dwarf2_locexpr_baton
13378 dwarf2_fetch_die_location_block (unsigned int offset,
13379 struct dwarf2_per_cu_data *per_cu,
13380 CORE_ADDR (*get_frame_pc) (void *baton),
13383 struct dwarf2_cu *cu = per_cu->cu;
13384 struct die_info *die;
13385 struct attribute *attr;
13386 struct dwarf2_locexpr_baton retval;
13388 dw2_setup (per_cu->objfile);
13390 die = follow_die_offset (offset, &cu);
13392 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
13393 offset, per_cu->cu->objfile->name);
13395 attr = dwarf2_attr (die, DW_AT_location, cu);
13398 /* DWARF: "If there is no such attribute, then there is no effect.". */
13400 retval.data = NULL;
13403 else if (attr_form_is_section_offset (attr))
13405 struct dwarf2_loclist_baton loclist_baton;
13406 CORE_ADDR pc = (*get_frame_pc) (baton);
13409 fill_in_loclist_baton (cu, &loclist_baton, attr);
13411 retval.data = dwarf2_find_location_expression (&loclist_baton,
13413 retval.size = size;
13417 if (!attr_form_is_block (attr))
13418 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
13419 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
13420 offset, per_cu->cu->objfile->name);
13422 retval.data = DW_BLOCK (attr)->data;
13423 retval.size = DW_BLOCK (attr)->size;
13425 retval.per_cu = cu->per_cu;
13429 /* Follow the signature attribute ATTR in SRC_DIE.
13430 On entry *REF_CU is the CU of SRC_DIE.
13431 On exit *REF_CU is the CU of the result. */
13433 static struct die_info *
13434 follow_die_sig (struct die_info *src_die, struct attribute *attr,
13435 struct dwarf2_cu **ref_cu)
13437 struct objfile *objfile = (*ref_cu)->objfile;
13438 struct die_info temp_die;
13439 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
13440 struct dwarf2_cu *sig_cu;
13441 struct die_info *die;
13443 /* sig_type will be NULL if the signatured type is missing from
13445 if (sig_type == NULL)
13446 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
13447 "at 0x%x [in module %s]"),
13448 src_die->offset, objfile->name);
13450 /* If necessary, add it to the queue and load its DIEs. */
13452 if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu))
13453 read_signatured_type (objfile, sig_type);
13455 gdb_assert (sig_type->per_cu.cu != NULL);
13457 sig_cu = sig_type->per_cu.cu;
13458 temp_die.offset = sig_cu->header.offset + sig_type->type_offset;
13459 die = htab_find_with_hash (sig_cu->die_hash, &temp_die, temp_die.offset);
13466 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
13467 "from DIE at 0x%x [in module %s]"),
13468 sig_type->type_offset, src_die->offset, objfile->name);
13471 /* Given an offset of a signatured type, return its signatured_type. */
13473 static struct signatured_type *
13474 lookup_signatured_type_at_offset (struct objfile *objfile, unsigned int offset)
13476 gdb_byte *info_ptr = dwarf2_per_objfile->types.buffer + offset;
13477 unsigned int length, initial_length_size;
13478 unsigned int sig_offset;
13479 struct signatured_type find_entry, *type_sig;
13481 length = read_initial_length (objfile->obfd, info_ptr, &initial_length_size);
13482 sig_offset = (initial_length_size
13484 + (initial_length_size == 4 ? 4 : 8) /*debug_abbrev_offset*/
13485 + 1 /*address_size*/);
13486 find_entry.signature = bfd_get_64 (objfile->obfd, info_ptr + sig_offset);
13487 type_sig = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
13489 /* This is only used to lookup previously recorded types.
13490 If we didn't find it, it's our bug. */
13491 gdb_assert (type_sig != NULL);
13492 gdb_assert (offset == type_sig->offset);
13497 /* Read in signatured type at OFFSET and build its CU and die(s). */
13500 read_signatured_type_at_offset (struct objfile *objfile,
13501 unsigned int offset)
13503 struct signatured_type *type_sig;
13505 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
13507 /* We have the section offset, but we need the signature to do the
13508 hash table lookup. */
13509 type_sig = lookup_signatured_type_at_offset (objfile, offset);
13511 gdb_assert (type_sig->per_cu.cu == NULL);
13513 read_signatured_type (objfile, type_sig);
13515 gdb_assert (type_sig->per_cu.cu != NULL);
13518 /* Read in a signatured type and build its CU and DIEs. */
13521 read_signatured_type (struct objfile *objfile,
13522 struct signatured_type *type_sig)
13524 gdb_byte *types_ptr;
13525 struct die_reader_specs reader_specs;
13526 struct dwarf2_cu *cu;
13527 ULONGEST signature;
13528 struct cleanup *back_to, *free_cu_cleanup;
13530 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
13531 types_ptr = dwarf2_per_objfile->types.buffer + type_sig->offset;
13533 gdb_assert (type_sig->per_cu.cu == NULL);
13535 cu = xmalloc (sizeof (*cu));
13536 init_one_comp_unit (cu, objfile);
13538 type_sig->per_cu.cu = cu;
13539 cu->per_cu = &type_sig->per_cu;
13541 /* If an error occurs while loading, release our storage. */
13542 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
13544 types_ptr = read_type_comp_unit_head (&cu->header, &signature,
13545 types_ptr, objfile->obfd);
13546 gdb_assert (signature == type_sig->signature);
13549 = htab_create_alloc_ex (cu->header.length / 12,
13553 &cu->comp_unit_obstack,
13554 hashtab_obstack_allocate,
13555 dummy_obstack_deallocate);
13557 dwarf2_read_abbrevs (cu->objfile->obfd, cu);
13558 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
13560 init_cu_die_reader (&reader_specs, cu);
13562 cu->dies = read_die_and_children (&reader_specs, types_ptr, &types_ptr,
13565 /* We try not to read any attributes in this function, because not
13566 all objfiles needed for references have been loaded yet, and symbol
13567 table processing isn't initialized. But we have to set the CU language,
13568 or we won't be able to build types correctly. */
13569 prepare_one_comp_unit (cu, cu->dies);
13571 do_cleanups (back_to);
13573 /* We've successfully allocated this compilation unit. Let our caller
13574 clean it up when finished with it. */
13575 discard_cleanups (free_cu_cleanup);
13577 type_sig->per_cu.cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
13578 dwarf2_per_objfile->read_in_chain = &type_sig->per_cu;
13581 /* Decode simple location descriptions.
13582 Given a pointer to a dwarf block that defines a location, compute
13583 the location and return the value.
13585 NOTE drow/2003-11-18: This function is called in two situations
13586 now: for the address of static or global variables (partial symbols
13587 only) and for offsets into structures which are expected to be
13588 (more or less) constant. The partial symbol case should go away,
13589 and only the constant case should remain. That will let this
13590 function complain more accurately. A few special modes are allowed
13591 without complaint for global variables (for instance, global
13592 register values and thread-local values).
13594 A location description containing no operations indicates that the
13595 object is optimized out. The return value is 0 for that case.
13596 FIXME drow/2003-11-16: No callers check for this case any more; soon all
13597 callers will only want a very basic result and this can become a
13600 Note that stack[0] is unused except as a default error return. */
13603 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
13605 struct objfile *objfile = cu->objfile;
13607 int size = blk->size;
13608 gdb_byte *data = blk->data;
13609 CORE_ADDR stack[64];
13611 unsigned int bytes_read, unsnd;
13617 stack[++stacki] = 0;
13656 stack[++stacki] = op - DW_OP_lit0;
13691 stack[++stacki] = op - DW_OP_reg0;
13693 dwarf2_complex_location_expr_complaint ();
13697 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
13699 stack[++stacki] = unsnd;
13701 dwarf2_complex_location_expr_complaint ();
13705 stack[++stacki] = read_address (objfile->obfd, &data[i],
13710 case DW_OP_const1u:
13711 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
13715 case DW_OP_const1s:
13716 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
13720 case DW_OP_const2u:
13721 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
13725 case DW_OP_const2s:
13726 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
13730 case DW_OP_const4u:
13731 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
13735 case DW_OP_const4s:
13736 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
13741 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
13747 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
13752 stack[stacki + 1] = stack[stacki];
13757 stack[stacki - 1] += stack[stacki];
13761 case DW_OP_plus_uconst:
13762 stack[stacki] += read_unsigned_leb128 (NULL, (data + i),
13768 stack[stacki - 1] -= stack[stacki];
13773 /* If we're not the last op, then we definitely can't encode
13774 this using GDB's address_class enum. This is valid for partial
13775 global symbols, although the variable's address will be bogus
13778 dwarf2_complex_location_expr_complaint ();
13781 case DW_OP_GNU_push_tls_address:
13782 /* The top of the stack has the offset from the beginning
13783 of the thread control block at which the variable is located. */
13784 /* Nothing should follow this operator, so the top of stack would
13786 /* This is valid for partial global symbols, but the variable's
13787 address will be bogus in the psymtab. */
13789 dwarf2_complex_location_expr_complaint ();
13792 case DW_OP_GNU_uninit:
13797 const char *name = dwarf_stack_op_name (op);
13800 complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
13803 complaint (&symfile_complaints, _("unsupported stack op: '%02x'"),
13807 return (stack[stacki]);
13810 /* Enforce maximum stack depth of SIZE-1 to avoid writing
13811 outside of the allocated space. Also enforce minimum>0. */
13812 if (stacki >= ARRAY_SIZE (stack) - 1)
13814 complaint (&symfile_complaints,
13815 _("location description stack overflow"));
13821 complaint (&symfile_complaints,
13822 _("location description stack underflow"));
13826 return (stack[stacki]);
13829 /* memory allocation interface */
13831 static struct dwarf_block *
13832 dwarf_alloc_block (struct dwarf2_cu *cu)
13834 struct dwarf_block *blk;
13836 blk = (struct dwarf_block *)
13837 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
13841 static struct abbrev_info *
13842 dwarf_alloc_abbrev (struct dwarf2_cu *cu)
13844 struct abbrev_info *abbrev;
13846 abbrev = (struct abbrev_info *)
13847 obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info));
13848 memset (abbrev, 0, sizeof (struct abbrev_info));
13852 static struct die_info *
13853 dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs)
13855 struct die_info *die;
13856 size_t size = sizeof (struct die_info);
13859 size += (num_attrs - 1) * sizeof (struct attribute);
13861 die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size);
13862 memset (die, 0, sizeof (struct die_info));
13867 /* Macro support. */
13869 /* Return the full name of file number I in *LH's file name table.
13870 Use COMP_DIR as the name of the current directory of the
13871 compilation. The result is allocated using xmalloc; the caller is
13872 responsible for freeing it. */
13874 file_full_name (int file, struct line_header *lh, const char *comp_dir)
13876 /* Is the file number a valid index into the line header's file name
13877 table? Remember that file numbers start with one, not zero. */
13878 if (1 <= file && file <= lh->num_file_names)
13880 struct file_entry *fe = &lh->file_names[file - 1];
13882 if (IS_ABSOLUTE_PATH (fe->name))
13883 return xstrdup (fe->name);
13891 dir = lh->include_dirs[fe->dir_index - 1];
13897 dir_len = strlen (dir);
13898 full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
13899 strcpy (full_name, dir);
13900 full_name[dir_len] = '/';
13901 strcpy (full_name + dir_len + 1, fe->name);
13905 return xstrdup (fe->name);
13910 /* The compiler produced a bogus file number. We can at least
13911 record the macro definitions made in the file, even if we
13912 won't be able to find the file by name. */
13913 char fake_name[80];
13915 sprintf (fake_name, "<bad macro file number %d>", file);
13917 complaint (&symfile_complaints,
13918 _("bad file number in macro information (%d)"),
13921 return xstrdup (fake_name);
13926 static struct macro_source_file *
13927 macro_start_file (int file, int line,
13928 struct macro_source_file *current_file,
13929 const char *comp_dir,
13930 struct line_header *lh, struct objfile *objfile)
13932 /* The full name of this source file. */
13933 char *full_name = file_full_name (file, lh, comp_dir);
13935 /* We don't create a macro table for this compilation unit
13936 at all until we actually get a filename. */
13937 if (! pending_macros)
13938 pending_macros = new_macro_table (&objfile->objfile_obstack,
13939 objfile->macro_cache);
13941 if (! current_file)
13942 /* If we have no current file, then this must be the start_file
13943 directive for the compilation unit's main source file. */
13944 current_file = macro_set_main (pending_macros, full_name);
13946 current_file = macro_include (current_file, line, full_name);
13950 return current_file;
13954 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
13955 followed by a null byte. */
13957 copy_string (const char *buf, int len)
13959 char *s = xmalloc (len + 1);
13961 memcpy (s, buf, len);
13967 static const char *
13968 consume_improper_spaces (const char *p, const char *body)
13972 complaint (&symfile_complaints,
13973 _("macro definition contains spaces "
13974 "in formal argument list:\n`%s'"),
13986 parse_macro_definition (struct macro_source_file *file, int line,
13991 /* The body string takes one of two forms. For object-like macro
13992 definitions, it should be:
13994 <macro name> " " <definition>
13996 For function-like macro definitions, it should be:
13998 <macro name> "() " <definition>
14000 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
14002 Spaces may appear only where explicitly indicated, and in the
14005 The Dwarf 2 spec says that an object-like macro's name is always
14006 followed by a space, but versions of GCC around March 2002 omit
14007 the space when the macro's definition is the empty string.
14009 The Dwarf 2 spec says that there should be no spaces between the
14010 formal arguments in a function-like macro's formal argument list,
14011 but versions of GCC around March 2002 include spaces after the
14015 /* Find the extent of the macro name. The macro name is terminated
14016 by either a space or null character (for an object-like macro) or
14017 an opening paren (for a function-like macro). */
14018 for (p = body; *p; p++)
14019 if (*p == ' ' || *p == '(')
14022 if (*p == ' ' || *p == '\0')
14024 /* It's an object-like macro. */
14025 int name_len = p - body;
14026 char *name = copy_string (body, name_len);
14027 const char *replacement;
14030 replacement = body + name_len + 1;
14033 dwarf2_macro_malformed_definition_complaint (body);
14034 replacement = body + name_len;
14037 macro_define_object (file, line, name, replacement);
14041 else if (*p == '(')
14043 /* It's a function-like macro. */
14044 char *name = copy_string (body, p - body);
14047 char **argv = xmalloc (argv_size * sizeof (*argv));
14051 p = consume_improper_spaces (p, body);
14053 /* Parse the formal argument list. */
14054 while (*p && *p != ')')
14056 /* Find the extent of the current argument name. */
14057 const char *arg_start = p;
14059 while (*p && *p != ',' && *p != ')' && *p != ' ')
14062 if (! *p || p == arg_start)
14063 dwarf2_macro_malformed_definition_complaint (body);
14066 /* Make sure argv has room for the new argument. */
14067 if (argc >= argv_size)
14070 argv = xrealloc (argv, argv_size * sizeof (*argv));
14073 argv[argc++] = copy_string (arg_start, p - arg_start);
14076 p = consume_improper_spaces (p, body);
14078 /* Consume the comma, if present. */
14083 p = consume_improper_spaces (p, body);
14092 /* Perfectly formed definition, no complaints. */
14093 macro_define_function (file, line, name,
14094 argc, (const char **) argv,
14096 else if (*p == '\0')
14098 /* Complain, but do define it. */
14099 dwarf2_macro_malformed_definition_complaint (body);
14100 macro_define_function (file, line, name,
14101 argc, (const char **) argv,
14105 /* Just complain. */
14106 dwarf2_macro_malformed_definition_complaint (body);
14109 /* Just complain. */
14110 dwarf2_macro_malformed_definition_complaint (body);
14116 for (i = 0; i < argc; i++)
14122 dwarf2_macro_malformed_definition_complaint (body);
14127 dwarf_decode_macros (struct line_header *lh, unsigned int offset,
14128 char *comp_dir, bfd *abfd,
14129 struct dwarf2_cu *cu)
14131 gdb_byte *mac_ptr, *mac_end;
14132 struct macro_source_file *current_file = 0;
14133 enum dwarf_macinfo_record_type macinfo_type;
14134 int at_commandline;
14136 dwarf2_read_section (dwarf2_per_objfile->objfile,
14137 &dwarf2_per_objfile->macinfo);
14138 if (dwarf2_per_objfile->macinfo.buffer == NULL)
14140 complaint (&symfile_complaints, _("missing .debug_macinfo section"));
14144 /* First pass: Find the name of the base filename.
14145 This filename is needed in order to process all macros whose definition
14146 (or undefinition) comes from the command line. These macros are defined
14147 before the first DW_MACINFO_start_file entry, and yet still need to be
14148 associated to the base file.
14150 To determine the base file name, we scan the macro definitions until we
14151 reach the first DW_MACINFO_start_file entry. We then initialize
14152 CURRENT_FILE accordingly so that any macro definition found before the
14153 first DW_MACINFO_start_file can still be associated to the base file. */
14155 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
14156 mac_end = dwarf2_per_objfile->macinfo.buffer
14157 + dwarf2_per_objfile->macinfo.size;
14161 /* Do we at least have room for a macinfo type byte? */
14162 if (mac_ptr >= mac_end)
14164 /* Complaint is printed during the second pass as GDB will probably
14165 stop the first pass earlier upon finding
14166 DW_MACINFO_start_file. */
14170 macinfo_type = read_1_byte (abfd, mac_ptr);
14173 switch (macinfo_type)
14175 /* A zero macinfo type indicates the end of the macro
14180 case DW_MACINFO_define:
14181 case DW_MACINFO_undef:
14182 /* Only skip the data by MAC_PTR. */
14184 unsigned int bytes_read;
14186 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
14187 mac_ptr += bytes_read;
14188 read_direct_string (abfd, mac_ptr, &bytes_read);
14189 mac_ptr += bytes_read;
14193 case DW_MACINFO_start_file:
14195 unsigned int bytes_read;
14198 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
14199 mac_ptr += bytes_read;
14200 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
14201 mac_ptr += bytes_read;
14203 current_file = macro_start_file (file, line, current_file,
14204 comp_dir, lh, cu->objfile);
14208 case DW_MACINFO_end_file:
14209 /* No data to skip by MAC_PTR. */
14212 case DW_MACINFO_vendor_ext:
14213 /* Only skip the data by MAC_PTR. */
14215 unsigned int bytes_read;
14217 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
14218 mac_ptr += bytes_read;
14219 read_direct_string (abfd, mac_ptr, &bytes_read);
14220 mac_ptr += bytes_read;
14227 } while (macinfo_type != 0 && current_file == NULL);
14229 /* Second pass: Process all entries.
14231 Use the AT_COMMAND_LINE flag to determine whether we are still processing
14232 command-line macro definitions/undefinitions. This flag is unset when we
14233 reach the first DW_MACINFO_start_file entry. */
14235 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
14237 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
14238 GDB is still reading the definitions from command line. First
14239 DW_MACINFO_start_file will need to be ignored as it was already executed
14240 to create CURRENT_FILE for the main source holding also the command line
14241 definitions. On first met DW_MACINFO_start_file this flag is reset to
14242 normally execute all the remaining DW_MACINFO_start_file macinfos. */
14244 at_commandline = 1;
14248 /* Do we at least have room for a macinfo type byte? */
14249 if (mac_ptr >= mac_end)
14251 dwarf2_macros_too_long_complaint ();
14255 macinfo_type = read_1_byte (abfd, mac_ptr);
14258 switch (macinfo_type)
14260 /* A zero macinfo type indicates the end of the macro
14265 case DW_MACINFO_define:
14266 case DW_MACINFO_undef:
14268 unsigned int bytes_read;
14272 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
14273 mac_ptr += bytes_read;
14274 body = read_direct_string (abfd, mac_ptr, &bytes_read);
14275 mac_ptr += bytes_read;
14277 if (! current_file)
14279 /* DWARF violation as no main source is present. */
14280 complaint (&symfile_complaints,
14281 _("debug info with no main source gives macro %s "
14283 macinfo_type == DW_MACINFO_define ?
14285 macinfo_type == DW_MACINFO_undef ?
14286 _("undefinition") :
14287 _("something-or-other"), line, body);
14290 if ((line == 0 && !at_commandline)
14291 || (line != 0 && at_commandline))
14292 complaint (&symfile_complaints,
14293 _("debug info gives %s macro %s with %s line %d: %s"),
14294 at_commandline ? _("command-line") : _("in-file"),
14295 macinfo_type == DW_MACINFO_define ?
14297 macinfo_type == DW_MACINFO_undef ?
14298 _("undefinition") :
14299 _("something-or-other"),
14300 line == 0 ? _("zero") : _("non-zero"), line, body);
14302 if (macinfo_type == DW_MACINFO_define)
14303 parse_macro_definition (current_file, line, body);
14304 else if (macinfo_type == DW_MACINFO_undef)
14305 macro_undef (current_file, line, body);
14309 case DW_MACINFO_start_file:
14311 unsigned int bytes_read;
14314 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
14315 mac_ptr += bytes_read;
14316 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
14317 mac_ptr += bytes_read;
14319 if ((line == 0 && !at_commandline)
14320 || (line != 0 && at_commandline))
14321 complaint (&symfile_complaints,
14322 _("debug info gives source %d included "
14323 "from %s at %s line %d"),
14324 file, at_commandline ? _("command-line") : _("file"),
14325 line == 0 ? _("zero") : _("non-zero"), line);
14327 if (at_commandline)
14329 /* This DW_MACINFO_start_file was executed in the pass one. */
14330 at_commandline = 0;
14333 current_file = macro_start_file (file, line,
14334 current_file, comp_dir,
14339 case DW_MACINFO_end_file:
14340 if (! current_file)
14341 complaint (&symfile_complaints,
14342 _("macro debug info has an unmatched "
14343 "`close_file' directive"));
14346 current_file = current_file->included_by;
14347 if (! current_file)
14349 enum dwarf_macinfo_record_type next_type;
14351 /* GCC circa March 2002 doesn't produce the zero
14352 type byte marking the end of the compilation
14353 unit. Complain if it's not there, but exit no
14356 /* Do we at least have room for a macinfo type byte? */
14357 if (mac_ptr >= mac_end)
14359 dwarf2_macros_too_long_complaint ();
14363 /* We don't increment mac_ptr here, so this is just
14365 next_type = read_1_byte (abfd, mac_ptr);
14366 if (next_type != 0)
14367 complaint (&symfile_complaints,
14368 _("no terminating 0-type entry for "
14369 "macros in `.debug_macinfo' section"));
14376 case DW_MACINFO_vendor_ext:
14378 unsigned int bytes_read;
14381 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
14382 mac_ptr += bytes_read;
14383 read_direct_string (abfd, mac_ptr, &bytes_read);
14384 mac_ptr += bytes_read;
14386 /* We don't recognize any vendor extensions. */
14390 } while (macinfo_type != 0);
14393 /* Check if the attribute's form is a DW_FORM_block*
14394 if so return true else false. */
14396 attr_form_is_block (struct attribute *attr)
14398 return (attr == NULL ? 0 :
14399 attr->form == DW_FORM_block1
14400 || attr->form == DW_FORM_block2
14401 || attr->form == DW_FORM_block4
14402 || attr->form == DW_FORM_block
14403 || attr->form == DW_FORM_exprloc);
14406 /* Return non-zero if ATTR's value is a section offset --- classes
14407 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
14408 You may use DW_UNSND (attr) to retrieve such offsets.
14410 Section 7.5.4, "Attribute Encodings", explains that no attribute
14411 may have a value that belongs to more than one of these classes; it
14412 would be ambiguous if we did, because we use the same forms for all
14415 attr_form_is_section_offset (struct attribute *attr)
14417 return (attr->form == DW_FORM_data4
14418 || attr->form == DW_FORM_data8
14419 || attr->form == DW_FORM_sec_offset);
14423 /* Return non-zero if ATTR's value falls in the 'constant' class, or
14424 zero otherwise. When this function returns true, you can apply
14425 dwarf2_get_attr_constant_value to it.
14427 However, note that for some attributes you must check
14428 attr_form_is_section_offset before using this test. DW_FORM_data4
14429 and DW_FORM_data8 are members of both the constant class, and of
14430 the classes that contain offsets into other debug sections
14431 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
14432 that, if an attribute's can be either a constant or one of the
14433 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
14434 taken as section offsets, not constants. */
14436 attr_form_is_constant (struct attribute *attr)
14438 switch (attr->form)
14440 case DW_FORM_sdata:
14441 case DW_FORM_udata:
14442 case DW_FORM_data1:
14443 case DW_FORM_data2:
14444 case DW_FORM_data4:
14445 case DW_FORM_data8:
14452 /* A helper function that fills in a dwarf2_loclist_baton. */
14455 fill_in_loclist_baton (struct dwarf2_cu *cu,
14456 struct dwarf2_loclist_baton *baton,
14457 struct attribute *attr)
14459 dwarf2_read_section (dwarf2_per_objfile->objfile,
14460 &dwarf2_per_objfile->loc);
14462 baton->per_cu = cu->per_cu;
14463 gdb_assert (baton->per_cu);
14464 /* We don't know how long the location list is, but make sure we
14465 don't run off the edge of the section. */
14466 baton->size = dwarf2_per_objfile->loc.size - DW_UNSND (attr);
14467 baton->data = dwarf2_per_objfile->loc.buffer + DW_UNSND (attr);
14468 baton->base_address = cu->base_address;
14472 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
14473 struct dwarf2_cu *cu)
14475 if (attr_form_is_section_offset (attr)
14476 /* ".debug_loc" may not exist at all, or the offset may be outside
14477 the section. If so, fall through to the complaint in the
14479 && DW_UNSND (attr) < dwarf2_section_size (dwarf2_per_objfile->objfile,
14480 &dwarf2_per_objfile->loc))
14482 struct dwarf2_loclist_baton *baton;
14484 baton = obstack_alloc (&cu->objfile->objfile_obstack,
14485 sizeof (struct dwarf2_loclist_baton));
14487 fill_in_loclist_baton (cu, baton, attr);
14489 if (cu->base_known == 0)
14490 complaint (&symfile_complaints,
14491 _("Location list used without "
14492 "specifying the CU base address."));
14494 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_loclist_funcs;
14495 SYMBOL_LOCATION_BATON (sym) = baton;
14499 struct dwarf2_locexpr_baton *baton;
14501 baton = obstack_alloc (&cu->objfile->objfile_obstack,
14502 sizeof (struct dwarf2_locexpr_baton));
14503 baton->per_cu = cu->per_cu;
14504 gdb_assert (baton->per_cu);
14506 if (attr_form_is_block (attr))
14508 /* Note that we're just copying the block's data pointer
14509 here, not the actual data. We're still pointing into the
14510 info_buffer for SYM's objfile; right now we never release
14511 that buffer, but when we do clean up properly this may
14513 baton->size = DW_BLOCK (attr)->size;
14514 baton->data = DW_BLOCK (attr)->data;
14518 dwarf2_invalid_attrib_class_complaint ("location description",
14519 SYMBOL_NATURAL_NAME (sym));
14521 baton->data = NULL;
14524 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
14525 SYMBOL_LOCATION_BATON (sym) = baton;
14529 /* Return the OBJFILE associated with the compilation unit CU. If CU
14530 came from a separate debuginfo file, then the master objfile is
14534 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu)
14536 struct objfile *objfile = per_cu->objfile;
14538 /* Return the master objfile, so that we can report and look up the
14539 correct file containing this variable. */
14540 if (objfile->separate_debug_objfile_backlink)
14541 objfile = objfile->separate_debug_objfile_backlink;
14546 /* Return the address size given in the compilation unit header for CU. */
14549 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu)
14552 return per_cu->cu->header.addr_size;
14555 /* If the CU is not currently read in, we re-read its header. */
14556 struct objfile *objfile = per_cu->objfile;
14557 struct dwarf2_per_objfile *per_objfile
14558 = objfile_data (objfile, dwarf2_objfile_data_key);
14559 gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
14560 struct comp_unit_head cu_header;
14562 memset (&cu_header, 0, sizeof cu_header);
14563 read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
14564 return cu_header.addr_size;
14568 /* Return the offset size given in the compilation unit header for CU. */
14571 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu)
14574 return per_cu->cu->header.offset_size;
14577 /* If the CU is not currently read in, we re-read its header. */
14578 struct objfile *objfile = per_cu->objfile;
14579 struct dwarf2_per_objfile *per_objfile
14580 = objfile_data (objfile, dwarf2_objfile_data_key);
14581 gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
14582 struct comp_unit_head cu_header;
14584 memset (&cu_header, 0, sizeof cu_header);
14585 read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
14586 return cu_header.offset_size;
14590 /* Return the text offset of the CU. The returned offset comes from
14591 this CU's objfile. If this objfile came from a separate debuginfo
14592 file, then the offset may be different from the corresponding
14593 offset in the parent objfile. */
14596 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu)
14598 struct objfile *objfile = per_cu->objfile;
14600 return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
14603 /* Locate the .debug_info compilation unit from CU's objfile which contains
14604 the DIE at OFFSET. Raises an error on failure. */
14606 static struct dwarf2_per_cu_data *
14607 dwarf2_find_containing_comp_unit (unsigned int offset,
14608 struct objfile *objfile)
14610 struct dwarf2_per_cu_data *this_cu;
14614 high = dwarf2_per_objfile->n_comp_units - 1;
14617 int mid = low + (high - low) / 2;
14619 if (dwarf2_per_objfile->all_comp_units[mid]->offset >= offset)
14624 gdb_assert (low == high);
14625 if (dwarf2_per_objfile->all_comp_units[low]->offset > offset)
14628 error (_("Dwarf Error: could not find partial DIE containing "
14629 "offset 0x%lx [in module %s]"),
14630 (long) offset, bfd_get_filename (objfile->obfd));
14632 gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset <= offset);
14633 return dwarf2_per_objfile->all_comp_units[low-1];
14637 this_cu = dwarf2_per_objfile->all_comp_units[low];
14638 if (low == dwarf2_per_objfile->n_comp_units - 1
14639 && offset >= this_cu->offset + this_cu->length)
14640 error (_("invalid dwarf2 offset %u"), offset);
14641 gdb_assert (offset < this_cu->offset + this_cu->length);
14646 /* Locate the compilation unit from OBJFILE which is located at exactly
14647 OFFSET. Raises an error on failure. */
14649 static struct dwarf2_per_cu_data *
14650 dwarf2_find_comp_unit (unsigned int offset, struct objfile *objfile)
14652 struct dwarf2_per_cu_data *this_cu;
14654 this_cu = dwarf2_find_containing_comp_unit (offset, objfile);
14655 if (this_cu->offset != offset)
14656 error (_("no compilation unit with offset %u."), offset);
14660 /* Initialize dwarf2_cu CU for OBJFILE in a pre-allocated space. */
14663 init_one_comp_unit (struct dwarf2_cu *cu, struct objfile *objfile)
14665 memset (cu, 0, sizeof (*cu));
14666 cu->objfile = objfile;
14667 obstack_init (&cu->comp_unit_obstack);
14670 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
14673 prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die)
14675 struct attribute *attr;
14677 /* Set the language we're debugging. */
14678 attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu);
14680 set_cu_language (DW_UNSND (attr), cu);
14682 set_cu_language (language_minimal, cu);
14685 /* Release one cached compilation unit, CU. We unlink it from the tree
14686 of compilation units, but we don't remove it from the read_in_chain;
14687 the caller is responsible for that.
14688 NOTE: DATA is a void * because this function is also used as a
14689 cleanup routine. */
14692 free_one_comp_unit (void *data)
14694 struct dwarf2_cu *cu = data;
14696 if (cu->per_cu != NULL)
14697 cu->per_cu->cu = NULL;
14700 obstack_free (&cu->comp_unit_obstack, NULL);
14705 /* This cleanup function is passed the address of a dwarf2_cu on the stack
14706 when we're finished with it. We can't free the pointer itself, but be
14707 sure to unlink it from the cache. Also release any associated storage
14708 and perform cache maintenance.
14710 Only used during partial symbol parsing. */
14713 free_stack_comp_unit (void *data)
14715 struct dwarf2_cu *cu = data;
14717 obstack_free (&cu->comp_unit_obstack, NULL);
14718 cu->partial_dies = NULL;
14720 if (cu->per_cu != NULL)
14722 /* This compilation unit is on the stack in our caller, so we
14723 should not xfree it. Just unlink it. */
14724 cu->per_cu->cu = NULL;
14727 /* If we had a per-cu pointer, then we may have other compilation
14728 units loaded, so age them now. */
14729 age_cached_comp_units ();
14733 /* Free all cached compilation units. */
14736 free_cached_comp_units (void *data)
14738 struct dwarf2_per_cu_data *per_cu, **last_chain;
14740 per_cu = dwarf2_per_objfile->read_in_chain;
14741 last_chain = &dwarf2_per_objfile->read_in_chain;
14742 while (per_cu != NULL)
14744 struct dwarf2_per_cu_data *next_cu;
14746 next_cu = per_cu->cu->read_in_chain;
14748 free_one_comp_unit (per_cu->cu);
14749 *last_chain = next_cu;
14755 /* Increase the age counter on each cached compilation unit, and free
14756 any that are too old. */
14759 age_cached_comp_units (void)
14761 struct dwarf2_per_cu_data *per_cu, **last_chain;
14763 dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
14764 per_cu = dwarf2_per_objfile->read_in_chain;
14765 while (per_cu != NULL)
14767 per_cu->cu->last_used ++;
14768 if (per_cu->cu->last_used <= dwarf2_max_cache_age)
14769 dwarf2_mark (per_cu->cu);
14770 per_cu = per_cu->cu->read_in_chain;
14773 per_cu = dwarf2_per_objfile->read_in_chain;
14774 last_chain = &dwarf2_per_objfile->read_in_chain;
14775 while (per_cu != NULL)
14777 struct dwarf2_per_cu_data *next_cu;
14779 next_cu = per_cu->cu->read_in_chain;
14781 if (!per_cu->cu->mark)
14783 free_one_comp_unit (per_cu->cu);
14784 *last_chain = next_cu;
14787 last_chain = &per_cu->cu->read_in_chain;
14793 /* Remove a single compilation unit from the cache. */
14796 free_one_cached_comp_unit (void *target_cu)
14798 struct dwarf2_per_cu_data *per_cu, **last_chain;
14800 per_cu = dwarf2_per_objfile->read_in_chain;
14801 last_chain = &dwarf2_per_objfile->read_in_chain;
14802 while (per_cu != NULL)
14804 struct dwarf2_per_cu_data *next_cu;
14806 next_cu = per_cu->cu->read_in_chain;
14808 if (per_cu->cu == target_cu)
14810 free_one_comp_unit (per_cu->cu);
14811 *last_chain = next_cu;
14815 last_chain = &per_cu->cu->read_in_chain;
14821 /* Release all extra memory associated with OBJFILE. */
14824 dwarf2_free_objfile (struct objfile *objfile)
14826 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
14828 if (dwarf2_per_objfile == NULL)
14831 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
14832 free_cached_comp_units (NULL);
14834 if (dwarf2_per_objfile->quick_file_names_table)
14835 htab_delete (dwarf2_per_objfile->quick_file_names_table);
14837 /* Everything else should be on the objfile obstack. */
14840 /* A pair of DIE offset and GDB type pointer. We store these
14841 in a hash table separate from the DIEs, and preserve them
14842 when the DIEs are flushed out of cache. */
14844 struct dwarf2_offset_and_type
14846 unsigned int offset;
14850 /* Hash function for a dwarf2_offset_and_type. */
14853 offset_and_type_hash (const void *item)
14855 const struct dwarf2_offset_and_type *ofs = item;
14857 return ofs->offset;
14860 /* Equality function for a dwarf2_offset_and_type. */
14863 offset_and_type_eq (const void *item_lhs, const void *item_rhs)
14865 const struct dwarf2_offset_and_type *ofs_lhs = item_lhs;
14866 const struct dwarf2_offset_and_type *ofs_rhs = item_rhs;
14868 return ofs_lhs->offset == ofs_rhs->offset;
14871 /* Set the type associated with DIE to TYPE. Save it in CU's hash
14872 table if necessary. For convenience, return TYPE.
14874 The DIEs reading must have careful ordering to:
14875 * Not cause infite loops trying to read in DIEs as a prerequisite for
14876 reading current DIE.
14877 * Not trying to dereference contents of still incompletely read in types
14878 while reading in other DIEs.
14879 * Enable referencing still incompletely read in types just by a pointer to
14880 the type without accessing its fields.
14882 Therefore caller should follow these rules:
14883 * Try to fetch any prerequisite types we may need to build this DIE type
14884 before building the type and calling set_die_type.
14885 * After building type call set_die_type for current DIE as soon as
14886 possible before fetching more types to complete the current type.
14887 * Make the type as complete as possible before fetching more types. */
14889 static struct type *
14890 set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
14892 struct dwarf2_offset_and_type **slot, ofs;
14893 struct objfile *objfile = cu->objfile;
14894 htab_t *type_hash_ptr;
14896 /* For Ada types, make sure that the gnat-specific data is always
14897 initialized (if not already set). There are a few types where
14898 we should not be doing so, because the type-specific area is
14899 already used to hold some other piece of info (eg: TYPE_CODE_FLT
14900 where the type-specific area is used to store the floatformat).
14901 But this is not a problem, because the gnat-specific information
14902 is actually not needed for these types. */
14903 if (need_gnat_info (cu)
14904 && TYPE_CODE (type) != TYPE_CODE_FUNC
14905 && TYPE_CODE (type) != TYPE_CODE_FLT
14906 && !HAVE_GNAT_AUX_INFO (type))
14907 INIT_GNAT_SPECIFIC (type);
14909 if (cu->per_cu->from_debug_types)
14910 type_hash_ptr = &dwarf2_per_objfile->debug_types_type_hash;
14912 type_hash_ptr = &dwarf2_per_objfile->debug_info_type_hash;
14914 if (*type_hash_ptr == NULL)
14917 = htab_create_alloc_ex (127,
14918 offset_and_type_hash,
14919 offset_and_type_eq,
14921 &objfile->objfile_obstack,
14922 hashtab_obstack_allocate,
14923 dummy_obstack_deallocate);
14926 ofs.offset = die->offset;
14928 slot = (struct dwarf2_offset_and_type **)
14929 htab_find_slot_with_hash (*type_hash_ptr, &ofs, ofs.offset, INSERT);
14931 complaint (&symfile_complaints,
14932 _("A problem internal to GDB: DIE 0x%x has type already set"),
14934 *slot = obstack_alloc (&objfile->objfile_obstack, sizeof (**slot));
14939 /* Look up the type for the die at DIE_OFFSET in the appropriate type_hash
14940 table, or return NULL if the die does not have a saved type. */
14942 static struct type *
14943 get_die_type_at_offset (unsigned int offset,
14944 struct dwarf2_per_cu_data *per_cu)
14946 struct dwarf2_offset_and_type *slot, ofs;
14949 if (per_cu->from_debug_types)
14950 type_hash = dwarf2_per_objfile->debug_types_type_hash;
14952 type_hash = dwarf2_per_objfile->debug_info_type_hash;
14953 if (type_hash == NULL)
14956 ofs.offset = offset;
14957 slot = htab_find_with_hash (type_hash, &ofs, ofs.offset);
14964 /* Look up the type for DIE in the appropriate type_hash table,
14965 or return NULL if DIE does not have a saved type. */
14967 static struct type *
14968 get_die_type (struct die_info *die, struct dwarf2_cu *cu)
14970 return get_die_type_at_offset (die->offset, cu->per_cu);
14973 /* Add a dependence relationship from CU to REF_PER_CU. */
14976 dwarf2_add_dependence (struct dwarf2_cu *cu,
14977 struct dwarf2_per_cu_data *ref_per_cu)
14981 if (cu->dependencies == NULL)
14983 = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
14984 NULL, &cu->comp_unit_obstack,
14985 hashtab_obstack_allocate,
14986 dummy_obstack_deallocate);
14988 slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
14990 *slot = ref_per_cu;
14993 /* Subroutine of dwarf2_mark to pass to htab_traverse.
14994 Set the mark field in every compilation unit in the
14995 cache that we must keep because we are keeping CU. */
14998 dwarf2_mark_helper (void **slot, void *data)
15000 struct dwarf2_per_cu_data *per_cu;
15002 per_cu = (struct dwarf2_per_cu_data *) *slot;
15003 if (per_cu->cu->mark)
15005 per_cu->cu->mark = 1;
15007 if (per_cu->cu->dependencies != NULL)
15008 htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
15013 /* Set the mark field in CU and in every other compilation unit in the
15014 cache that we must keep because we are keeping CU. */
15017 dwarf2_mark (struct dwarf2_cu *cu)
15022 if (cu->dependencies != NULL)
15023 htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
15027 dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
15031 per_cu->cu->mark = 0;
15032 per_cu = per_cu->cu->read_in_chain;
15036 /* Trivial hash function for partial_die_info: the hash value of a DIE
15037 is its offset in .debug_info for this objfile. */
15040 partial_die_hash (const void *item)
15042 const struct partial_die_info *part_die = item;
15044 return part_die->offset;
15047 /* Trivial comparison function for partial_die_info structures: two DIEs
15048 are equal if they have the same offset. */
15051 partial_die_eq (const void *item_lhs, const void *item_rhs)
15053 const struct partial_die_info *part_die_lhs = item_lhs;
15054 const struct partial_die_info *part_die_rhs = item_rhs;
15056 return part_die_lhs->offset == part_die_rhs->offset;
15059 static struct cmd_list_element *set_dwarf2_cmdlist;
15060 static struct cmd_list_element *show_dwarf2_cmdlist;
15063 set_dwarf2_cmd (char *args, int from_tty)
15065 help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
15069 show_dwarf2_cmd (char *args, int from_tty)
15071 cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
15074 /* If section described by INFO was mmapped, munmap it now. */
15077 munmap_section_buffer (struct dwarf2_section_info *info)
15079 if (info->was_mmapped)
15082 intptr_t begin = (intptr_t) info->buffer;
15083 intptr_t map_begin = begin & ~(pagesize - 1);
15084 size_t map_length = info->size + begin - map_begin;
15086 gdb_assert (munmap ((void *) map_begin, map_length) == 0);
15088 /* Without HAVE_MMAP, we should never be here to begin with. */
15089 gdb_assert_not_reached ("no mmap support");
15094 /* munmap debug sections for OBJFILE, if necessary. */
15097 dwarf2_per_objfile_free (struct objfile *objfile, void *d)
15099 struct dwarf2_per_objfile *data = d;
15101 /* This is sorted according to the order they're defined in to make it easier
15102 to keep in sync. */
15103 munmap_section_buffer (&data->info);
15104 munmap_section_buffer (&data->abbrev);
15105 munmap_section_buffer (&data->line);
15106 munmap_section_buffer (&data->loc);
15107 munmap_section_buffer (&data->macinfo);
15108 munmap_section_buffer (&data->str);
15109 munmap_section_buffer (&data->ranges);
15110 munmap_section_buffer (&data->types);
15111 munmap_section_buffer (&data->frame);
15112 munmap_section_buffer (&data->eh_frame);
15113 munmap_section_buffer (&data->gdb_index);
15117 /* The "save gdb-index" command. */
15119 /* The contents of the hash table we create when building the string
15121 struct strtab_entry
15123 offset_type offset;
15127 /* Hash function for a strtab_entry. */
15130 hash_strtab_entry (const void *e)
15132 const struct strtab_entry *entry = e;
15133 return mapped_index_string_hash (entry->str);
15136 /* Equality function for a strtab_entry. */
15139 eq_strtab_entry (const void *a, const void *b)
15141 const struct strtab_entry *ea = a;
15142 const struct strtab_entry *eb = b;
15143 return !strcmp (ea->str, eb->str);
15146 /* Create a strtab_entry hash table. */
15149 create_strtab (void)
15151 return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry,
15152 xfree, xcalloc, xfree);
15155 /* Add a string to the constant pool. Return the string's offset in
15159 add_string (htab_t table, struct obstack *cpool, const char *str)
15162 struct strtab_entry entry;
15163 struct strtab_entry *result;
15166 slot = htab_find_slot (table, &entry, INSERT);
15171 result = XNEW (struct strtab_entry);
15172 result->offset = obstack_object_size (cpool);
15174 obstack_grow_str0 (cpool, str);
15177 return result->offset;
15180 /* An entry in the symbol table. */
15181 struct symtab_index_entry
15183 /* The name of the symbol. */
15185 /* The offset of the name in the constant pool. */
15186 offset_type index_offset;
15187 /* A sorted vector of the indices of all the CUs that hold an object
15189 VEC (offset_type) *cu_indices;
15192 /* The symbol table. This is a power-of-2-sized hash table. */
15193 struct mapped_symtab
15195 offset_type n_elements;
15197 struct symtab_index_entry **data;
15200 /* Hash function for a symtab_index_entry. */
15203 hash_symtab_entry (const void *e)
15205 const struct symtab_index_entry *entry = e;
15206 return iterative_hash (VEC_address (offset_type, entry->cu_indices),
15207 sizeof (offset_type) * VEC_length (offset_type,
15208 entry->cu_indices),
15212 /* Equality function for a symtab_index_entry. */
15215 eq_symtab_entry (const void *a, const void *b)
15217 const struct symtab_index_entry *ea = a;
15218 const struct symtab_index_entry *eb = b;
15219 int len = VEC_length (offset_type, ea->cu_indices);
15220 if (len != VEC_length (offset_type, eb->cu_indices))
15222 return !memcmp (VEC_address (offset_type, ea->cu_indices),
15223 VEC_address (offset_type, eb->cu_indices),
15224 sizeof (offset_type) * len);
15227 /* Destroy a symtab_index_entry. */
15230 delete_symtab_entry (void *p)
15232 struct symtab_index_entry *entry = p;
15233 VEC_free (offset_type, entry->cu_indices);
15237 /* Create a hash table holding symtab_index_entry objects. */
15240 create_symbol_hash_table (void)
15242 return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry,
15243 delete_symtab_entry, xcalloc, xfree);
15246 /* Create a new mapped symtab object. */
15248 static struct mapped_symtab *
15249 create_mapped_symtab (void)
15251 struct mapped_symtab *symtab = XNEW (struct mapped_symtab);
15252 symtab->n_elements = 0;
15253 symtab->size = 1024;
15254 symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
15258 /* Destroy a mapped_symtab. */
15261 cleanup_mapped_symtab (void *p)
15263 struct mapped_symtab *symtab = p;
15264 /* The contents of the array are freed when the other hash table is
15266 xfree (symtab->data);
15270 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
15273 static struct symtab_index_entry **
15274 find_slot (struct mapped_symtab *symtab, const char *name)
15276 offset_type index, step, hash = mapped_index_string_hash (name);
15278 index = hash & (symtab->size - 1);
15279 step = ((hash * 17) & (symtab->size - 1)) | 1;
15283 if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name))
15284 return &symtab->data[index];
15285 index = (index + step) & (symtab->size - 1);
15289 /* Expand SYMTAB's hash table. */
15292 hash_expand (struct mapped_symtab *symtab)
15294 offset_type old_size = symtab->size;
15296 struct symtab_index_entry **old_entries = symtab->data;
15299 symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
15301 for (i = 0; i < old_size; ++i)
15303 if (old_entries[i])
15305 struct symtab_index_entry **slot = find_slot (symtab,
15306 old_entries[i]->name);
15307 *slot = old_entries[i];
15311 xfree (old_entries);
15314 /* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
15315 is the index of the CU in which the symbol appears. */
15318 add_index_entry (struct mapped_symtab *symtab, const char *name,
15319 offset_type cu_index)
15321 struct symtab_index_entry **slot;
15323 ++symtab->n_elements;
15324 if (4 * symtab->n_elements / 3 >= symtab->size)
15325 hash_expand (symtab);
15327 slot = find_slot (symtab, name);
15330 *slot = XNEW (struct symtab_index_entry);
15331 (*slot)->name = name;
15332 (*slot)->cu_indices = NULL;
15334 /* Don't push an index twice. Due to how we add entries we only
15335 have to check the last one. */
15336 if (VEC_empty (offset_type, (*slot)->cu_indices)
15337 || VEC_length (offset_type, (*slot)->cu_indices) != cu_index)
15338 VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index);
15341 /* Add a vector of indices to the constant pool. */
15344 add_indices_to_cpool (htab_t symbol_hash_table, struct obstack *cpool,
15345 struct symtab_index_entry *entry)
15349 slot = htab_find_slot (symbol_hash_table, entry, INSERT);
15352 offset_type len = VEC_length (offset_type, entry->cu_indices);
15353 offset_type val = MAYBE_SWAP (len);
15358 entry->index_offset = obstack_object_size (cpool);
15360 obstack_grow (cpool, &val, sizeof (val));
15362 VEC_iterate (offset_type, entry->cu_indices, i, iter);
15365 val = MAYBE_SWAP (iter);
15366 obstack_grow (cpool, &val, sizeof (val));
15371 struct symtab_index_entry *old_entry = *slot;
15372 entry->index_offset = old_entry->index_offset;
15375 return entry->index_offset;
15378 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
15379 constant pool entries going into the obstack CPOOL. */
15382 write_hash_table (struct mapped_symtab *symtab,
15383 struct obstack *output, struct obstack *cpool)
15386 htab_t symbol_hash_table;
15389 symbol_hash_table = create_symbol_hash_table ();
15390 str_table = create_strtab ();
15392 /* We add all the index vectors to the constant pool first, to
15393 ensure alignment is ok. */
15394 for (i = 0; i < symtab->size; ++i)
15396 if (symtab->data[i])
15397 add_indices_to_cpool (symbol_hash_table, cpool, symtab->data[i]);
15400 /* Now write out the hash table. */
15401 for (i = 0; i < symtab->size; ++i)
15403 offset_type str_off, vec_off;
15405 if (symtab->data[i])
15407 str_off = add_string (str_table, cpool, symtab->data[i]->name);
15408 vec_off = symtab->data[i]->index_offset;
15412 /* While 0 is a valid constant pool index, it is not valid
15413 to have 0 for both offsets. */
15418 str_off = MAYBE_SWAP (str_off);
15419 vec_off = MAYBE_SWAP (vec_off);
15421 obstack_grow (output, &str_off, sizeof (str_off));
15422 obstack_grow (output, &vec_off, sizeof (vec_off));
15425 htab_delete (str_table);
15426 htab_delete (symbol_hash_table);
15429 /* Struct to map psymtab to CU index in the index file. */
15430 struct psymtab_cu_index_map
15432 struct partial_symtab *psymtab;
15433 unsigned int cu_index;
15437 hash_psymtab_cu_index (const void *item)
15439 const struct psymtab_cu_index_map *map = item;
15441 return htab_hash_pointer (map->psymtab);
15445 eq_psymtab_cu_index (const void *item_lhs, const void *item_rhs)
15447 const struct psymtab_cu_index_map *lhs = item_lhs;
15448 const struct psymtab_cu_index_map *rhs = item_rhs;
15450 return lhs->psymtab == rhs->psymtab;
15453 /* Helper struct for building the address table. */
15454 struct addrmap_index_data
15456 struct objfile *objfile;
15457 struct obstack *addr_obstack;
15458 htab_t cu_index_htab;
15460 /* Non-zero if the previous_* fields are valid.
15461 We can't write an entry until we see the next entry (since it is only then
15462 that we know the end of the entry). */
15463 int previous_valid;
15464 /* Index of the CU in the table of all CUs in the index file. */
15465 unsigned int previous_cu_index;
15466 /* Start address of the CU. */
15467 CORE_ADDR previous_cu_start;
15470 /* Write an address entry to OBSTACK. */
15473 add_address_entry (struct objfile *objfile, struct obstack *obstack,
15474 CORE_ADDR start, CORE_ADDR end, unsigned int cu_index)
15476 offset_type cu_index_to_write;
15478 CORE_ADDR baseaddr;
15480 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
15482 store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, start - baseaddr);
15483 obstack_grow (obstack, addr, 8);
15484 store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, end - baseaddr);
15485 obstack_grow (obstack, addr, 8);
15486 cu_index_to_write = MAYBE_SWAP (cu_index);
15487 obstack_grow (obstack, &cu_index_to_write, sizeof (offset_type));
15490 /* Worker function for traversing an addrmap to build the address table. */
15493 add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj)
15495 struct addrmap_index_data *data = datap;
15496 struct partial_symtab *pst = obj;
15497 offset_type cu_index;
15500 if (data->previous_valid)
15501 add_address_entry (data->objfile, data->addr_obstack,
15502 data->previous_cu_start, start_addr,
15503 data->previous_cu_index);
15505 data->previous_cu_start = start_addr;
15508 struct psymtab_cu_index_map find_map, *map;
15509 find_map.psymtab = pst;
15510 map = htab_find (data->cu_index_htab, &find_map);
15511 gdb_assert (map != NULL);
15512 data->previous_cu_index = map->cu_index;
15513 data->previous_valid = 1;
15516 data->previous_valid = 0;
15521 /* Write OBJFILE's address map to OBSTACK.
15522 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
15523 in the index file. */
15526 write_address_map (struct objfile *objfile, struct obstack *obstack,
15527 htab_t cu_index_htab)
15529 struct addrmap_index_data addrmap_index_data;
15531 /* When writing the address table, we have to cope with the fact that
15532 the addrmap iterator only provides the start of a region; we have to
15533 wait until the next invocation to get the start of the next region. */
15535 addrmap_index_data.objfile = objfile;
15536 addrmap_index_data.addr_obstack = obstack;
15537 addrmap_index_data.cu_index_htab = cu_index_htab;
15538 addrmap_index_data.previous_valid = 0;
15540 addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker,
15541 &addrmap_index_data);
15543 /* It's highly unlikely the last entry (end address = 0xff...ff)
15544 is valid, but we should still handle it.
15545 The end address is recorded as the start of the next region, but that
15546 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
15548 if (addrmap_index_data.previous_valid)
15549 add_address_entry (objfile, obstack,
15550 addrmap_index_data.previous_cu_start, (CORE_ADDR) -1,
15551 addrmap_index_data.previous_cu_index);
15554 /* Add a list of partial symbols to SYMTAB. */
15557 write_psymbols (struct mapped_symtab *symtab,
15559 struct partial_symbol **psymp,
15561 offset_type cu_index,
15564 for (; count-- > 0; ++psymp)
15566 void **slot, *lookup;
15568 if (SYMBOL_LANGUAGE (*psymp) == language_ada)
15569 error (_("Ada is not currently supported by the index"));
15571 /* We only want to add a given psymbol once. However, we also
15572 want to account for whether it is global or static. So, we
15573 may add it twice, using slightly different values. */
15576 uintptr_t val = 1 | (uintptr_t) *psymp;
15578 lookup = (void *) val;
15583 /* Only add a given psymbol once. */
15584 slot = htab_find_slot (psyms_seen, lookup, INSERT);
15588 add_index_entry (symtab, SYMBOL_NATURAL_NAME (*psymp), cu_index);
15593 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
15594 exception if there is an error. */
15597 write_obstack (FILE *file, struct obstack *obstack)
15599 if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack),
15601 != obstack_object_size (obstack))
15602 error (_("couldn't data write to file"));
15605 /* Unlink a file if the argument is not NULL. */
15608 unlink_if_set (void *p)
15610 char **filename = p;
15612 unlink (*filename);
15615 /* A helper struct used when iterating over debug_types. */
15616 struct signatured_type_index_data
15618 struct objfile *objfile;
15619 struct mapped_symtab *symtab;
15620 struct obstack *types_list;
15625 /* A helper function that writes a single signatured_type to an
15629 write_one_signatured_type (void **slot, void *d)
15631 struct signatured_type_index_data *info = d;
15632 struct signatured_type *entry = (struct signatured_type *) *slot;
15633 struct dwarf2_per_cu_data *per_cu = &entry->per_cu;
15634 struct partial_symtab *psymtab = per_cu->v.psymtab;
15637 write_psymbols (info->symtab,
15639 info->objfile->global_psymbols.list
15640 + psymtab->globals_offset,
15641 psymtab->n_global_syms, info->cu_index,
15643 write_psymbols (info->symtab,
15645 info->objfile->static_psymbols.list
15646 + psymtab->statics_offset,
15647 psymtab->n_static_syms, info->cu_index,
15650 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->offset);
15651 obstack_grow (info->types_list, val, 8);
15652 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->type_offset);
15653 obstack_grow (info->types_list, val, 8);
15654 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature);
15655 obstack_grow (info->types_list, val, 8);
15662 /* A cleanup function for an htab_t. */
15665 cleanup_htab (void *arg)
15670 /* Create an index file for OBJFILE in the directory DIR. */
15673 write_psymtabs_to_index (struct objfile *objfile, const char *dir)
15675 struct cleanup *cleanup;
15676 char *filename, *cleanup_filename;
15677 struct obstack contents, addr_obstack, constant_pool, symtab_obstack;
15678 struct obstack cu_list, types_cu_list;
15681 struct mapped_symtab *symtab;
15682 offset_type val, size_of_contents, total_len;
15686 htab_t cu_index_htab;
15687 struct psymtab_cu_index_map *psymtab_cu_index_map;
15689 if (!objfile->psymtabs)
15691 if (dwarf2_per_objfile->using_index)
15692 error (_("Cannot use an index to create the index"));
15694 if (stat (objfile->name, &st) < 0)
15695 perror_with_name (objfile->name);
15697 filename = concat (dir, SLASH_STRING, lbasename (objfile->name),
15698 INDEX_SUFFIX, (char *) NULL);
15699 cleanup = make_cleanup (xfree, filename);
15701 out_file = fopen (filename, "wb");
15703 error (_("Can't open `%s' for writing"), filename);
15705 cleanup_filename = filename;
15706 make_cleanup (unlink_if_set, &cleanup_filename);
15708 symtab = create_mapped_symtab ();
15709 make_cleanup (cleanup_mapped_symtab, symtab);
15711 obstack_init (&addr_obstack);
15712 make_cleanup_obstack_free (&addr_obstack);
15714 obstack_init (&cu_list);
15715 make_cleanup_obstack_free (&cu_list);
15717 obstack_init (&types_cu_list);
15718 make_cleanup_obstack_free (&types_cu_list);
15720 psyms_seen = htab_create_alloc (100, htab_hash_pointer, htab_eq_pointer,
15721 NULL, xcalloc, xfree);
15722 make_cleanup (cleanup_htab, psyms_seen);
15724 /* While we're scanning CU's create a table that maps a psymtab pointer
15725 (which is what addrmap records) to its index (which is what is recorded
15726 in the index file). This will later be needed to write the address
15728 cu_index_htab = htab_create_alloc (100,
15729 hash_psymtab_cu_index,
15730 eq_psymtab_cu_index,
15731 NULL, xcalloc, xfree);
15732 make_cleanup (cleanup_htab, cu_index_htab);
15733 psymtab_cu_index_map = (struct psymtab_cu_index_map *)
15734 xmalloc (sizeof (struct psymtab_cu_index_map)
15735 * dwarf2_per_objfile->n_comp_units);
15736 make_cleanup (xfree, psymtab_cu_index_map);
15738 /* The CU list is already sorted, so we don't need to do additional
15739 work here. Also, the debug_types entries do not appear in
15740 all_comp_units, but only in their own hash table. */
15741 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
15743 struct dwarf2_per_cu_data *per_cu
15744 = dwarf2_per_objfile->all_comp_units[i];
15745 struct partial_symtab *psymtab = per_cu->v.psymtab;
15747 struct psymtab_cu_index_map *map;
15750 write_psymbols (symtab,
15752 objfile->global_psymbols.list + psymtab->globals_offset,
15753 psymtab->n_global_syms, i,
15755 write_psymbols (symtab,
15757 objfile->static_psymbols.list + psymtab->statics_offset,
15758 psymtab->n_static_syms, i,
15761 map = &psymtab_cu_index_map[i];
15762 map->psymtab = psymtab;
15764 slot = htab_find_slot (cu_index_htab, map, INSERT);
15765 gdb_assert (slot != NULL);
15766 gdb_assert (*slot == NULL);
15769 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->offset);
15770 obstack_grow (&cu_list, val, 8);
15771 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length);
15772 obstack_grow (&cu_list, val, 8);
15775 /* Dump the address map. */
15776 write_address_map (objfile, &addr_obstack, cu_index_htab);
15778 /* Write out the .debug_type entries, if any. */
15779 if (dwarf2_per_objfile->signatured_types)
15781 struct signatured_type_index_data sig_data;
15783 sig_data.objfile = objfile;
15784 sig_data.symtab = symtab;
15785 sig_data.types_list = &types_cu_list;
15786 sig_data.psyms_seen = psyms_seen;
15787 sig_data.cu_index = dwarf2_per_objfile->n_comp_units;
15788 htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
15789 write_one_signatured_type, &sig_data);
15792 obstack_init (&constant_pool);
15793 make_cleanup_obstack_free (&constant_pool);
15794 obstack_init (&symtab_obstack);
15795 make_cleanup_obstack_free (&symtab_obstack);
15796 write_hash_table (symtab, &symtab_obstack, &constant_pool);
15798 obstack_init (&contents);
15799 make_cleanup_obstack_free (&contents);
15800 size_of_contents = 6 * sizeof (offset_type);
15801 total_len = size_of_contents;
15803 /* The version number. */
15804 val = MAYBE_SWAP (4);
15805 obstack_grow (&contents, &val, sizeof (val));
15807 /* The offset of the CU list from the start of the file. */
15808 val = MAYBE_SWAP (total_len);
15809 obstack_grow (&contents, &val, sizeof (val));
15810 total_len += obstack_object_size (&cu_list);
15812 /* The offset of the types CU list from the start of the file. */
15813 val = MAYBE_SWAP (total_len);
15814 obstack_grow (&contents, &val, sizeof (val));
15815 total_len += obstack_object_size (&types_cu_list);
15817 /* The offset of the address table from the start of the file. */
15818 val = MAYBE_SWAP (total_len);
15819 obstack_grow (&contents, &val, sizeof (val));
15820 total_len += obstack_object_size (&addr_obstack);
15822 /* The offset of the symbol table from the start of the file. */
15823 val = MAYBE_SWAP (total_len);
15824 obstack_grow (&contents, &val, sizeof (val));
15825 total_len += obstack_object_size (&symtab_obstack);
15827 /* The offset of the constant pool from the start of the file. */
15828 val = MAYBE_SWAP (total_len);
15829 obstack_grow (&contents, &val, sizeof (val));
15830 total_len += obstack_object_size (&constant_pool);
15832 gdb_assert (obstack_object_size (&contents) == size_of_contents);
15834 write_obstack (out_file, &contents);
15835 write_obstack (out_file, &cu_list);
15836 write_obstack (out_file, &types_cu_list);
15837 write_obstack (out_file, &addr_obstack);
15838 write_obstack (out_file, &symtab_obstack);
15839 write_obstack (out_file, &constant_pool);
15843 /* We want to keep the file, so we set cleanup_filename to NULL
15844 here. See unlink_if_set. */
15845 cleanup_filename = NULL;
15847 do_cleanups (cleanup);
15850 /* The mapped index file format is designed to be directly mmap()able
15851 on any architecture. In most cases, a datum is represented using a
15852 little-endian 32-bit integer value, called an offset_type. Big
15853 endian machines must byte-swap the values before using them.
15854 Exceptions to this rule are noted. The data is laid out such that
15855 alignment is always respected.
15857 A mapped index consists of several sections.
15859 1. The file header. This is a sequence of values, of offset_type
15860 unless otherwise noted:
15862 [0] The version number, currently 4. Versions 1, 2 and 3 are
15864 [1] The offset, from the start of the file, of the CU list.
15865 [2] The offset, from the start of the file, of the types CU list.
15866 Note that this section can be empty, in which case this offset will
15867 be equal to the next offset.
15868 [3] The offset, from the start of the file, of the address section.
15869 [4] The offset, from the start of the file, of the symbol table.
15870 [5] The offset, from the start of the file, of the constant pool.
15872 2. The CU list. This is a sequence of pairs of 64-bit
15873 little-endian values, sorted by the CU offset. The first element
15874 in each pair is the offset of a CU in the .debug_info section. The
15875 second element in each pair is the length of that CU. References
15876 to a CU elsewhere in the map are done using a CU index, which is
15877 just the 0-based index into this table. Note that if there are
15878 type CUs, then conceptually CUs and type CUs form a single list for
15879 the purposes of CU indices.
15881 3. The types CU list. This is a sequence of triplets of 64-bit
15882 little-endian values. In a triplet, the first value is the CU
15883 offset, the second value is the type offset in the CU, and the
15884 third value is the type signature. The types CU list is not
15887 4. The address section. The address section consists of a sequence
15888 of address entries. Each address entry has three elements.
15889 [0] The low address. This is a 64-bit little-endian value.
15890 [1] The high address. This is a 64-bit little-endian value.
15891 Like DW_AT_high_pc, the value is one byte beyond the end.
15892 [2] The CU index. This is an offset_type value.
15894 5. The symbol table. This is a hash table. The size of the hash
15895 table is always a power of 2. The initial hash and the step are
15896 currently defined by the `find_slot' function.
15898 Each slot in the hash table consists of a pair of offset_type
15899 values. The first value is the offset of the symbol's name in the
15900 constant pool. The second value is the offset of the CU vector in
15903 If both values are 0, then this slot in the hash table is empty.
15904 This is ok because while 0 is a valid constant pool index, it
15905 cannot be a valid index for both a string and a CU vector.
15907 A string in the constant pool is stored as a \0-terminated string,
15910 A CU vector in the constant pool is a sequence of offset_type
15911 values. The first value is the number of CU indices in the vector.
15912 Each subsequent value is the index of a CU in the CU list. This
15913 element in the hash table is used to indicate which CUs define the
15916 6. The constant pool. This is simply a bunch of bytes. It is
15917 organized so that alignment is correct: CU vectors are stored
15918 first, followed by strings. */
15921 save_gdb_index_command (char *arg, int from_tty)
15923 struct objfile *objfile;
15926 error (_("usage: save gdb-index DIRECTORY"));
15928 ALL_OBJFILES (objfile)
15932 /* If the objfile does not correspond to an actual file, skip it. */
15933 if (stat (objfile->name, &st) < 0)
15936 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
15937 if (dwarf2_per_objfile)
15939 volatile struct gdb_exception except;
15941 TRY_CATCH (except, RETURN_MASK_ERROR)
15943 write_psymtabs_to_index (objfile, arg);
15945 if (except.reason < 0)
15946 exception_fprintf (gdb_stderr, except,
15947 _("Error while writing index for `%s': "),
15955 int dwarf2_always_disassemble;
15958 show_dwarf2_always_disassemble (struct ui_file *file, int from_tty,
15959 struct cmd_list_element *c, const char *value)
15961 fprintf_filtered (file,
15962 _("Whether to always disassemble "
15963 "DWARF expressions is %s.\n"),
15967 void _initialize_dwarf2_read (void);
15970 _initialize_dwarf2_read (void)
15972 struct cmd_list_element *c;
15974 dwarf2_objfile_data_key
15975 = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free);
15977 add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
15978 Set DWARF 2 specific variables.\n\
15979 Configure DWARF 2 variables such as the cache size"),
15980 &set_dwarf2_cmdlist, "maintenance set dwarf2 ",
15981 0/*allow-unknown*/, &maintenance_set_cmdlist);
15983 add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\
15984 Show DWARF 2 specific variables\n\
15985 Show DWARF 2 variables such as the cache size"),
15986 &show_dwarf2_cmdlist, "maintenance show dwarf2 ",
15987 0/*allow-unknown*/, &maintenance_show_cmdlist);
15989 add_setshow_zinteger_cmd ("max-cache-age", class_obscure,
15990 &dwarf2_max_cache_age, _("\
15991 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
15992 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
15993 A higher limit means that cached compilation units will be stored\n\
15994 in memory longer, and more total memory will be used. Zero disables\n\
15995 caching, which can slow down startup."),
15997 show_dwarf2_max_cache_age,
15998 &set_dwarf2_cmdlist,
15999 &show_dwarf2_cmdlist);
16001 add_setshow_boolean_cmd ("always-disassemble", class_obscure,
16002 &dwarf2_always_disassemble, _("\
16003 Set whether `info address' always disassembles DWARF expressions."), _("\
16004 Show whether `info address' always disassembles DWARF expressions."), _("\
16005 When enabled, DWARF expressions are always printed in an assembly-like\n\
16006 syntax. When disabled, expressions will be printed in a more\n\
16007 conversational style, when possible."),
16009 show_dwarf2_always_disassemble,
16010 &set_dwarf2_cmdlist,
16011 &show_dwarf2_cmdlist);
16013 add_setshow_zinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\
16014 Set debugging of the dwarf2 DIE reader."), _("\
16015 Show debugging of the dwarf2 DIE reader."), _("\
16016 When enabled (non-zero), DIEs are dumped after they are read in.\n\
16017 The value is the maximum depth to print."),
16020 &setdebuglist, &showdebuglist);
16022 c = add_cmd ("gdb-index", class_files, save_gdb_index_command,
16024 Save a gdb-index file.\n\
16025 Usage: save gdb-index DIRECTORY"),
16027 set_cmd_completer (c, filename_completer);