1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
8 Inc. with support from Florida State University (under contract
9 with the Ada Joint Program Office), and Silicon Graphics, Inc.
10 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
11 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
14 This file is part of GDB.
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 3 of the License, or
19 (at your option) any later version.
21 This program is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public License
27 along with this program. If not, see <http://www.gnu.org/licenses/>. */
37 #include "expression.h"
38 #include "filenames.h" /* for DOSish file names */
41 #include "complaints.h"
43 #include "dwarf2expr.h"
44 #include "dwarf2loc.h"
45 #include "cp-support.h"
51 #include "typeprint.h"
54 #include "exceptions.h"
56 #include "completer.h"
62 #include "gdb_string.h"
63 #include "gdb_assert.h"
64 #include <sys/types.h>
71 #define MAP_FAILED ((void *) -1)
75 typedef struct symbol *symbolp;
79 /* .debug_info header for a compilation unit
80 Because of alignment constraints, this structure has padding and cannot
81 be mapped directly onto the beginning of the .debug_info section. */
82 typedef struct comp_unit_header
84 unsigned int length; /* length of the .debug_info
86 unsigned short version; /* version number -- 2 for DWARF
88 unsigned int abbrev_offset; /* offset into .debug_abbrev section */
89 unsigned char addr_size; /* byte size of an address -- 4 */
92 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
95 /* .debug_line statement program prologue
96 Because of alignment constraints, this structure has padding and cannot
97 be mapped directly onto the beginning of the .debug_info section. */
98 typedef struct statement_prologue
100 unsigned int total_length; /* byte length of the statement
102 unsigned short version; /* version number -- 2 for DWARF
104 unsigned int prologue_length; /* # bytes between prologue &
106 unsigned char minimum_instruction_length; /* byte size of
108 unsigned char default_is_stmt; /* initial value of is_stmt
111 unsigned char line_range;
112 unsigned char opcode_base; /* number assigned to first special
114 unsigned char *standard_opcode_lengths;
118 /* When non-zero, dump DIEs after they are read in. */
119 static int dwarf2_die_debug = 0;
123 /* When set, the file that we're processing is known to have debugging
124 info for C++ namespaces. GCC 3.3.x did not produce this information,
125 but later versions do. */
127 static int processing_has_namespace_info;
129 static const struct objfile_data *dwarf2_objfile_data_key;
131 struct dwarf2_section_info
137 /* True if we have tried to read this section. */
141 /* All offsets in the index are of this type. It must be
142 architecture-independent. */
143 typedef uint32_t offset_type;
145 DEF_VEC_I (offset_type);
147 /* A description of the mapped index. The file format is described in
148 a comment by the code that writes the index. */
151 /* The total length of the buffer. */
153 /* A pointer to the address table data. */
154 const gdb_byte *address_table;
155 /* Size of the address table data in bytes. */
156 offset_type address_table_size;
157 /* The hash table. */
158 const offset_type *index_table;
159 /* Size in slots, each slot is 2 offset_types. */
160 offset_type index_table_slots;
161 /* A pointer to the constant pool. */
162 const char *constant_pool;
165 struct dwarf2_per_objfile
167 struct dwarf2_section_info info;
168 struct dwarf2_section_info abbrev;
169 struct dwarf2_section_info line;
170 struct dwarf2_section_info loc;
171 struct dwarf2_section_info macinfo;
172 struct dwarf2_section_info str;
173 struct dwarf2_section_info ranges;
174 struct dwarf2_section_info types;
175 struct dwarf2_section_info frame;
176 struct dwarf2_section_info eh_frame;
177 struct dwarf2_section_info gdb_index;
180 struct objfile *objfile;
182 /* A list of all the compilation units. This is used to locate
183 the target compilation unit of a particular reference. */
184 struct dwarf2_per_cu_data **all_comp_units;
186 /* The number of compilation units in ALL_COMP_UNITS. */
189 /* The number of .debug_types-related CUs. */
190 int n_type_comp_units;
192 /* The .debug_types-related CUs. */
193 struct dwarf2_per_cu_data **type_comp_units;
195 /* A chain of compilation units that are currently read in, so that
196 they can be freed later. */
197 struct dwarf2_per_cu_data *read_in_chain;
199 /* A table mapping .debug_types signatures to its signatured_type entry.
200 This is NULL if the .debug_types section hasn't been read in yet. */
201 htab_t signatured_types;
203 /* A flag indicating wether this objfile has a section loaded at a
205 int has_section_at_zero;
207 /* True if we are using the mapped index. */
208 unsigned char using_index;
210 /* The mapped index. */
211 struct mapped_index *index_table;
213 /* Set during partial symbol reading, to prevent queueing of full
215 int reading_partial_symbols;
217 /* Table mapping type .debug_info DIE offsets to types.
218 This is NULL if not allocated yet.
219 It (currently) makes sense to allocate debug_types_type_hash lazily.
220 To keep things simple we allocate both lazily. */
221 htab_t debug_info_type_hash;
223 /* Table mapping type .debug_types DIE offsets to types.
224 This is NULL if not allocated yet. */
225 htab_t debug_types_type_hash;
228 static struct dwarf2_per_objfile *dwarf2_per_objfile;
230 /* names of the debugging sections */
232 /* Note that if the debugging section has been compressed, it might
233 have a name like .zdebug_info. */
235 #define INFO_SECTION "debug_info"
236 #define ABBREV_SECTION "debug_abbrev"
237 #define LINE_SECTION "debug_line"
238 #define LOC_SECTION "debug_loc"
239 #define MACINFO_SECTION "debug_macinfo"
240 #define STR_SECTION "debug_str"
241 #define RANGES_SECTION "debug_ranges"
242 #define TYPES_SECTION "debug_types"
243 #define FRAME_SECTION "debug_frame"
244 #define EH_FRAME_SECTION "eh_frame"
245 #define GDB_INDEX_SECTION "gdb_index"
247 /* local data types */
249 /* We hold several abbreviation tables in memory at the same time. */
250 #ifndef ABBREV_HASH_SIZE
251 #define ABBREV_HASH_SIZE 121
254 /* The data in a compilation unit header, after target2host
255 translation, looks like this. */
256 struct comp_unit_head
260 unsigned char addr_size;
261 unsigned char signed_addr_p;
262 unsigned int abbrev_offset;
264 /* Size of file offsets; either 4 or 8. */
265 unsigned int offset_size;
267 /* Size of the length field; either 4 or 12. */
268 unsigned int initial_length_size;
270 /* Offset to the first byte of this compilation unit header in the
271 .debug_info section, for resolving relative reference dies. */
274 /* Offset to first die in this cu from the start of the cu.
275 This will be the first byte following the compilation unit header. */
276 unsigned int first_die_offset;
279 /* Type used for delaying computation of method physnames.
280 See comments for compute_delayed_physnames. */
281 struct delayed_method_info
283 /* The type to which the method is attached, i.e., its parent class. */
286 /* The index of the method in the type's function fieldlists. */
289 /* The index of the method in the fieldlist. */
292 /* The name of the DIE. */
295 /* The DIE associated with this method. */
296 struct die_info *die;
299 typedef struct delayed_method_info delayed_method_info;
300 DEF_VEC_O (delayed_method_info);
302 /* Internal state when decoding a particular compilation unit. */
305 /* The objfile containing this compilation unit. */
306 struct objfile *objfile;
308 /* The header of the compilation unit. */
309 struct comp_unit_head header;
311 /* Base address of this compilation unit. */
312 CORE_ADDR base_address;
314 /* Non-zero if base_address has been set. */
317 struct function_range *first_fn, *last_fn, *cached_fn;
319 /* The language we are debugging. */
320 enum language language;
321 const struct language_defn *language_defn;
323 const char *producer;
325 /* The generic symbol table building routines have separate lists for
326 file scope symbols and all all other scopes (local scopes). So
327 we need to select the right one to pass to add_symbol_to_list().
328 We do it by keeping a pointer to the correct list in list_in_scope.
330 FIXME: The original dwarf code just treated the file scope as the
331 first local scope, and all other local scopes as nested local
332 scopes, and worked fine. Check to see if we really need to
333 distinguish these in buildsym.c. */
334 struct pending **list_in_scope;
336 /* DWARF abbreviation table associated with this compilation unit. */
337 struct abbrev_info **dwarf2_abbrevs;
339 /* Storage for the abbrev table. */
340 struct obstack abbrev_obstack;
342 /* Hash table holding all the loaded partial DIEs. */
345 /* Storage for things with the same lifetime as this read-in compilation
346 unit, including partial DIEs. */
347 struct obstack comp_unit_obstack;
349 /* When multiple dwarf2_cu structures are living in memory, this field
350 chains them all together, so that they can be released efficiently.
351 We will probably also want a generation counter so that most-recently-used
352 compilation units are cached... */
353 struct dwarf2_per_cu_data *read_in_chain;
355 /* Backchain to our per_cu entry if the tree has been built. */
356 struct dwarf2_per_cu_data *per_cu;
358 /* How many compilation units ago was this CU last referenced? */
361 /* A hash table of die offsets for following references. */
364 /* Full DIEs if read in. */
365 struct die_info *dies;
367 /* A set of pointers to dwarf2_per_cu_data objects for compilation
368 units referenced by this one. Only set during full symbol processing;
369 partial symbol tables do not have dependencies. */
372 /* Header data from the line table, during full symbol processing. */
373 struct line_header *line_header;
375 /* A list of methods which need to have physnames computed
376 after all type information has been read. */
377 VEC (delayed_method_info) *method_list;
379 /* Mark used when releasing cached dies. */
380 unsigned int mark : 1;
382 /* This flag will be set if this compilation unit might include
383 inter-compilation-unit references. */
384 unsigned int has_form_ref_addr : 1;
386 /* This flag will be set if this compilation unit includes any
387 DW_TAG_namespace DIEs. If we know that there are explicit
388 DIEs for namespaces, we don't need to try to infer them
389 from mangled names. */
390 unsigned int has_namespace_info : 1;
393 /* When using the index (and thus not using psymtabs), each CU has an
394 object of this type. This is used to hold information needed by
395 the various "quick" methods. */
396 struct dwarf2_per_cu_quick_data
398 /* The line table. This can be NULL if there was no line table. */
399 struct line_header *lines;
401 /* The file names from the line table. */
402 const char **file_names;
403 /* The file names from the line table after being run through
405 const char **full_names;
407 /* The corresponding symbol table. This is NULL if symbols for this
408 CU have not yet been read. */
409 struct symtab *symtab;
411 /* A temporary mark bit used when iterating over all CUs in
412 expand_symtabs_matching. */
413 unsigned int mark : 1;
415 /* True if we've tried to read the line table. */
416 unsigned int read_lines : 1;
419 /* Persistent data held for a compilation unit, even when not
420 processing it. We put a pointer to this structure in the
421 read_symtab_private field of the psymtab. If we encounter
422 inter-compilation-unit references, we also maintain a sorted
423 list of all compilation units. */
425 struct dwarf2_per_cu_data
427 /* The start offset and length of this compilation unit. 2**29-1
428 bytes should suffice to store the length of any compilation unit
429 - if it doesn't, GDB will fall over anyway.
430 NOTE: Unlike comp_unit_head.length, this length includes
431 initial_length_size. */
433 unsigned int length : 29;
435 /* Flag indicating this compilation unit will be read in before
436 any of the current compilation units are processed. */
437 unsigned int queued : 1;
439 /* This flag will be set if we need to load absolutely all DIEs
440 for this compilation unit, instead of just the ones we think
441 are interesting. It gets set if we look for a DIE in the
442 hash table and don't find it. */
443 unsigned int load_all_dies : 1;
445 /* Non-zero if this CU is from .debug_types.
446 Otherwise it's from .debug_info. */
447 unsigned int from_debug_types : 1;
449 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
450 of the CU cache it gets reset to NULL again. */
451 struct dwarf2_cu *cu;
453 /* The corresponding objfile. */
454 struct objfile *objfile;
456 /* When using partial symbol tables, the 'psymtab' field is active.
457 Otherwise the 'quick' field is active. */
460 /* The partial symbol table associated with this compilation unit,
461 or NULL for partial units (which do not have an associated
463 struct partial_symtab *psymtab;
465 /* Data needed by the "quick" functions. */
466 struct dwarf2_per_cu_quick_data *quick;
470 /* Entry in the signatured_types hash table. */
472 struct signatured_type
476 /* Offset in .debug_types of the TU (type_unit) for this type. */
479 /* Offset in .debug_types of the type defined by this TU. */
480 unsigned int type_offset;
482 /* The CU(/TU) of this type. */
483 struct dwarf2_per_cu_data per_cu;
486 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
487 which are used for both .debug_info and .debug_types dies.
488 All parameters here are unchanging for the life of the call.
489 This struct exists to abstract away the constant parameters of
492 struct die_reader_specs
494 /* The bfd of this objfile. */
497 /* The CU of the DIE we are parsing. */
498 struct dwarf2_cu *cu;
500 /* Pointer to start of section buffer.
501 This is either the start of .debug_info or .debug_types. */
502 const gdb_byte *buffer;
505 /* The line number information for a compilation unit (found in the
506 .debug_line section) begins with a "statement program header",
507 which contains the following information. */
510 unsigned int total_length;
511 unsigned short version;
512 unsigned int header_length;
513 unsigned char minimum_instruction_length;
514 unsigned char maximum_ops_per_instruction;
515 unsigned char default_is_stmt;
517 unsigned char line_range;
518 unsigned char opcode_base;
520 /* standard_opcode_lengths[i] is the number of operands for the
521 standard opcode whose value is i. This means that
522 standard_opcode_lengths[0] is unused, and the last meaningful
523 element is standard_opcode_lengths[opcode_base - 1]. */
524 unsigned char *standard_opcode_lengths;
526 /* The include_directories table. NOTE! These strings are not
527 allocated with xmalloc; instead, they are pointers into
528 debug_line_buffer. If you try to free them, `free' will get
530 unsigned int num_include_dirs, include_dirs_size;
533 /* The file_names table. NOTE! These strings are not allocated
534 with xmalloc; instead, they are pointers into debug_line_buffer.
535 Don't try to free them directly. */
536 unsigned int num_file_names, file_names_size;
540 unsigned int dir_index;
541 unsigned int mod_time;
543 int included_p; /* Non-zero if referenced by the Line Number Program. */
544 struct symtab *symtab; /* The associated symbol table, if any. */
547 /* The start and end of the statement program following this
548 header. These point into dwarf2_per_objfile->line_buffer. */
549 gdb_byte *statement_program_start, *statement_program_end;
552 /* When we construct a partial symbol table entry we only
553 need this much information. */
554 struct partial_die_info
556 /* Offset of this DIE. */
559 /* DWARF-2 tag for this DIE. */
560 ENUM_BITFIELD(dwarf_tag) tag : 16;
562 /* Assorted flags describing the data found in this DIE. */
563 unsigned int has_children : 1;
564 unsigned int is_external : 1;
565 unsigned int is_declaration : 1;
566 unsigned int has_type : 1;
567 unsigned int has_specification : 1;
568 unsigned int has_pc_info : 1;
570 /* Flag set if the SCOPE field of this structure has been
572 unsigned int scope_set : 1;
574 /* Flag set if the DIE has a byte_size attribute. */
575 unsigned int has_byte_size : 1;
577 /* Flag set if any of the DIE's children are template arguments. */
578 unsigned int has_template_arguments : 1;
580 /* The name of this DIE. Normally the value of DW_AT_name, but
581 sometimes a default name for unnamed DIEs. */
584 /* The scope to prepend to our children. This is generally
585 allocated on the comp_unit_obstack, so will disappear
586 when this compilation unit leaves the cache. */
589 /* The location description associated with this DIE, if any. */
590 struct dwarf_block *locdesc;
592 /* If HAS_PC_INFO, the PC range associated with this DIE. */
596 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
597 DW_AT_sibling, if any. */
600 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
601 DW_AT_specification (or DW_AT_abstract_origin or
603 unsigned int spec_offset;
605 /* Pointers to this DIE's parent, first child, and next sibling,
607 struct partial_die_info *die_parent, *die_child, *die_sibling;
610 /* This data structure holds the information of an abbrev. */
613 unsigned int number; /* number identifying abbrev */
614 enum dwarf_tag tag; /* dwarf tag */
615 unsigned short has_children; /* boolean */
616 unsigned short num_attrs; /* number of attributes */
617 struct attr_abbrev *attrs; /* an array of attribute descriptions */
618 struct abbrev_info *next; /* next in chain */
623 ENUM_BITFIELD(dwarf_attribute) name : 16;
624 ENUM_BITFIELD(dwarf_form) form : 16;
627 /* Attributes have a name and a value */
630 ENUM_BITFIELD(dwarf_attribute) name : 16;
631 ENUM_BITFIELD(dwarf_form) form : 15;
633 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
634 field should be in u.str (existing only for DW_STRING) but it is kept
635 here for better struct attribute alignment. */
636 unsigned int string_is_canonical : 1;
641 struct dwarf_block *blk;
645 struct signatured_type *signatured_type;
650 /* This data structure holds a complete die structure. */
653 /* DWARF-2 tag for this DIE. */
654 ENUM_BITFIELD(dwarf_tag) tag : 16;
656 /* Number of attributes */
657 unsigned char num_attrs;
659 /* True if we're presently building the full type name for the
660 type derived from this DIE. */
661 unsigned char building_fullname : 1;
666 /* Offset in .debug_info or .debug_types section. */
669 /* The dies in a compilation unit form an n-ary tree. PARENT
670 points to this die's parent; CHILD points to the first child of
671 this node; and all the children of a given node are chained
672 together via their SIBLING fields, terminated by a die whose
674 struct die_info *child; /* Its first child, if any. */
675 struct die_info *sibling; /* Its next sibling, if any. */
676 struct die_info *parent; /* Its parent, if any. */
678 /* An array of attributes, with NUM_ATTRS elements. There may be
679 zero, but it's not common and zero-sized arrays are not
680 sufficiently portable C. */
681 struct attribute attrs[1];
684 struct function_range
687 CORE_ADDR lowpc, highpc;
689 struct function_range *next;
692 /* Get at parts of an attribute structure */
694 #define DW_STRING(attr) ((attr)->u.str)
695 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
696 #define DW_UNSND(attr) ((attr)->u.unsnd)
697 #define DW_BLOCK(attr) ((attr)->u.blk)
698 #define DW_SND(attr) ((attr)->u.snd)
699 #define DW_ADDR(attr) ((attr)->u.addr)
700 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
702 /* Blocks are a bunch of untyped bytes. */
709 #ifndef ATTR_ALLOC_CHUNK
710 #define ATTR_ALLOC_CHUNK 4
713 /* Allocate fields for structs, unions and enums in this size. */
714 #ifndef DW_FIELD_ALLOC_CHUNK
715 #define DW_FIELD_ALLOC_CHUNK 4
718 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
719 but this would require a corresponding change in unpack_field_as_long
721 static int bits_per_byte = 8;
723 /* The routines that read and process dies for a C struct or C++ class
724 pass lists of data member fields and lists of member function fields
725 in an instance of a field_info structure, as defined below. */
728 /* List of data member and baseclasses fields. */
731 struct nextfield *next;
736 *fields, *baseclasses;
738 /* Number of fields (including baseclasses). */
741 /* Number of baseclasses. */
744 /* Set if the accesibility of one of the fields is not public. */
745 int non_public_fields;
747 /* Member function fields array, entries are allocated in the order they
748 are encountered in the object file. */
751 struct nextfnfield *next;
752 struct fn_field fnfield;
756 /* Member function fieldlist array, contains name of possibly overloaded
757 member function, number of overloaded member functions and a pointer
758 to the head of the member function field chain. */
763 struct nextfnfield *head;
767 /* Number of entries in the fnfieldlists array. */
770 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
771 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
772 struct typedef_field_list
774 struct typedef_field field;
775 struct typedef_field_list *next;
778 unsigned typedef_field_list_count;
781 /* One item on the queue of compilation units to read in full symbols
783 struct dwarf2_queue_item
785 struct dwarf2_per_cu_data *per_cu;
786 struct dwarf2_queue_item *next;
789 /* The current queue. */
790 static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail;
792 /* Loaded secondary compilation units are kept in memory until they
793 have not been referenced for the processing of this many
794 compilation units. Set this to zero to disable caching. Cache
795 sizes of up to at least twenty will improve startup time for
796 typical inter-CU-reference binaries, at an obvious memory cost. */
797 static int dwarf2_max_cache_age = 5;
799 show_dwarf2_max_cache_age (struct ui_file *file, int from_tty,
800 struct cmd_list_element *c, const char *value)
802 fprintf_filtered (file, _("\
803 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
808 /* Various complaints about symbol reading that don't abort the process */
811 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
813 complaint (&symfile_complaints,
814 _("statement list doesn't fit in .debug_line section"));
818 dwarf2_debug_line_missing_file_complaint (void)
820 complaint (&symfile_complaints,
821 _(".debug_line section has line data without a file"));
825 dwarf2_debug_line_missing_end_sequence_complaint (void)
827 complaint (&symfile_complaints,
828 _(".debug_line section has line program sequence without an end"));
832 dwarf2_complex_location_expr_complaint (void)
834 complaint (&symfile_complaints, _("location expression too complex"));
838 dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
841 complaint (&symfile_complaints,
842 _("const value length mismatch for '%s', got %d, expected %d"), arg1,
847 dwarf2_macros_too_long_complaint (void)
849 complaint (&symfile_complaints,
850 _("macro info runs off end of `.debug_macinfo' section"));
854 dwarf2_macro_malformed_definition_complaint (const char *arg1)
856 complaint (&symfile_complaints,
857 _("macro debug info contains a malformed macro definition:\n`%s'"),
862 dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
864 complaint (&symfile_complaints,
865 _("invalid attribute class or form for '%s' in '%s'"), arg1, arg2);
868 /* local function prototypes */
870 static void dwarf2_locate_sections (bfd *, asection *, void *);
872 static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
875 static void dwarf2_build_psymtabs_hard (struct objfile *);
877 static void scan_partial_symbols (struct partial_die_info *,
878 CORE_ADDR *, CORE_ADDR *,
879 int, struct dwarf2_cu *);
881 static void add_partial_symbol (struct partial_die_info *,
884 static void add_partial_namespace (struct partial_die_info *pdi,
885 CORE_ADDR *lowpc, CORE_ADDR *highpc,
886 int need_pc, struct dwarf2_cu *cu);
888 static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
889 CORE_ADDR *highpc, int need_pc,
890 struct dwarf2_cu *cu);
892 static void add_partial_enumeration (struct partial_die_info *enum_pdi,
893 struct dwarf2_cu *cu);
895 static void add_partial_subprogram (struct partial_die_info *pdi,
896 CORE_ADDR *lowpc, CORE_ADDR *highpc,
897 int need_pc, struct dwarf2_cu *cu);
899 static gdb_byte *locate_pdi_sibling (struct partial_die_info *orig_pdi,
900 gdb_byte *buffer, gdb_byte *info_ptr,
901 bfd *abfd, struct dwarf2_cu *cu);
903 static void dwarf2_psymtab_to_symtab (struct partial_symtab *);
905 static void psymtab_to_symtab_1 (struct partial_symtab *);
907 static void dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu);
909 static void dwarf2_free_abbrev_table (void *);
911 static struct abbrev_info *peek_die_abbrev (gdb_byte *, unsigned int *,
914 static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int,
917 static struct partial_die_info *load_partial_dies (bfd *,
918 gdb_byte *, gdb_byte *,
919 int, struct dwarf2_cu *);
921 static gdb_byte *read_partial_die (struct partial_die_info *,
922 struct abbrev_info *abbrev,
924 gdb_byte *, gdb_byte *,
927 static struct partial_die_info *find_partial_die (unsigned int,
930 static void fixup_partial_die (struct partial_die_info *,
933 static gdb_byte *read_attribute (struct attribute *, struct attr_abbrev *,
934 bfd *, gdb_byte *, struct dwarf2_cu *);
936 static gdb_byte *read_attribute_value (struct attribute *, unsigned,
937 bfd *, gdb_byte *, struct dwarf2_cu *);
939 static unsigned int read_1_byte (bfd *, gdb_byte *);
941 static int read_1_signed_byte (bfd *, gdb_byte *);
943 static unsigned int read_2_bytes (bfd *, gdb_byte *);
945 static unsigned int read_4_bytes (bfd *, gdb_byte *);
947 static ULONGEST read_8_bytes (bfd *, gdb_byte *);
949 static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *,
952 static LONGEST read_initial_length (bfd *, gdb_byte *, unsigned int *);
954 static LONGEST read_checked_initial_length_and_offset
955 (bfd *, gdb_byte *, const struct comp_unit_head *,
956 unsigned int *, unsigned int *);
958 static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *,
961 static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int);
963 static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int);
965 static char *read_direct_string (bfd *, gdb_byte *, unsigned int *);
967 static char *read_indirect_string (bfd *, gdb_byte *,
968 const struct comp_unit_head *,
971 static unsigned long read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *);
973 static long read_signed_leb128 (bfd *, gdb_byte *, unsigned int *);
975 static gdb_byte *skip_leb128 (bfd *, gdb_byte *);
977 static void set_cu_language (unsigned int, struct dwarf2_cu *);
979 static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
982 static struct attribute *dwarf2_attr_no_follow (struct die_info *,
986 static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
987 struct dwarf2_cu *cu);
989 static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
991 static struct die_info *die_specification (struct die_info *die,
992 struct dwarf2_cu **);
994 static void free_line_header (struct line_header *lh);
996 static void add_file_name (struct line_header *, char *, unsigned int,
997 unsigned int, unsigned int);
999 static struct line_header *(dwarf_decode_line_header
1000 (unsigned int offset,
1001 bfd *abfd, struct dwarf2_cu *cu));
1003 static void dwarf_decode_lines (struct line_header *, char *, bfd *,
1004 struct dwarf2_cu *, struct partial_symtab *);
1006 static void dwarf2_start_subfile (char *, char *, char *);
1008 static struct symbol *new_symbol (struct die_info *, struct type *,
1009 struct dwarf2_cu *);
1011 static struct symbol *new_symbol_full (struct die_info *, struct type *,
1012 struct dwarf2_cu *, struct symbol *);
1014 static void dwarf2_const_value (struct attribute *, struct symbol *,
1015 struct dwarf2_cu *);
1017 static void dwarf2_const_value_attr (struct attribute *attr,
1020 struct obstack *obstack,
1021 struct dwarf2_cu *cu, long *value,
1023 struct dwarf2_locexpr_baton **baton);
1025 static struct type *die_type (struct die_info *, struct dwarf2_cu *);
1027 static int need_gnat_info (struct dwarf2_cu *);
1029 static struct type *die_descriptive_type (struct die_info *, struct dwarf2_cu *);
1031 static void set_descriptive_type (struct type *, struct die_info *,
1032 struct dwarf2_cu *);
1034 static struct type *die_containing_type (struct die_info *,
1035 struct dwarf2_cu *);
1037 static struct type *lookup_die_type (struct die_info *, struct attribute *,
1038 struct dwarf2_cu *);
1040 static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
1042 static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *);
1044 static char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
1046 static char *typename_concat (struct obstack *obs, const char *prefix,
1047 const char *suffix, int physname,
1048 struct dwarf2_cu *cu);
1050 static void read_file_scope (struct die_info *, struct dwarf2_cu *);
1052 static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *);
1054 static void read_func_scope (struct die_info *, struct dwarf2_cu *);
1056 static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
1058 static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *,
1059 struct dwarf2_cu *, struct partial_symtab *);
1061 static int dwarf2_get_pc_bounds (struct die_info *,
1062 CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *,
1063 struct partial_symtab *);
1065 static void get_scope_pc_bounds (struct die_info *,
1066 CORE_ADDR *, CORE_ADDR *,
1067 struct dwarf2_cu *);
1069 static void dwarf2_record_block_ranges (struct die_info *, struct block *,
1070 CORE_ADDR, struct dwarf2_cu *);
1072 static void dwarf2_add_field (struct field_info *, struct die_info *,
1073 struct dwarf2_cu *);
1075 static void dwarf2_attach_fields_to_type (struct field_info *,
1076 struct type *, struct dwarf2_cu *);
1078 static void dwarf2_add_member_fn (struct field_info *,
1079 struct die_info *, struct type *,
1080 struct dwarf2_cu *);
1082 static void dwarf2_attach_fn_fields_to_type (struct field_info *,
1083 struct type *, struct dwarf2_cu *);
1085 static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
1087 static void read_common_block (struct die_info *, struct dwarf2_cu *);
1089 static void read_namespace (struct die_info *die, struct dwarf2_cu *);
1091 static void read_module (struct die_info *die, struct dwarf2_cu *cu);
1093 static void read_import_statement (struct die_info *die, struct dwarf2_cu *);
1095 static struct type *read_module_type (struct die_info *die,
1096 struct dwarf2_cu *cu);
1098 static const char *namespace_name (struct die_info *die,
1099 int *is_anonymous, struct dwarf2_cu *);
1101 static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
1103 static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
1105 static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
1106 struct dwarf2_cu *);
1108 static struct die_info *read_comp_unit (gdb_byte *, struct dwarf2_cu *);
1110 static struct die_info *read_die_and_children_1 (const struct die_reader_specs *reader,
1112 gdb_byte **new_info_ptr,
1113 struct die_info *parent);
1115 static struct die_info *read_die_and_children (const struct die_reader_specs *reader,
1117 gdb_byte **new_info_ptr,
1118 struct die_info *parent);
1120 static struct die_info *read_die_and_siblings (const struct die_reader_specs *reader,
1122 gdb_byte **new_info_ptr,
1123 struct die_info *parent);
1125 static gdb_byte *read_full_die (const struct die_reader_specs *reader,
1126 struct die_info **, gdb_byte *,
1129 static void process_die (struct die_info *, struct dwarf2_cu *);
1131 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu *,
1134 static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
1136 static const char *dwarf2_full_name (char *name,
1137 struct die_info *die,
1138 struct dwarf2_cu *cu);
1140 static struct die_info *dwarf2_extension (struct die_info *die,
1141 struct dwarf2_cu **);
1143 static char *dwarf_tag_name (unsigned int);
1145 static char *dwarf_attr_name (unsigned int);
1147 static char *dwarf_form_name (unsigned int);
1149 static char *dwarf_bool_name (unsigned int);
1151 static char *dwarf_type_encoding_name (unsigned int);
1154 static char *dwarf_cfi_name (unsigned int);
1157 static struct die_info *sibling_die (struct die_info *);
1159 static void dump_die_shallow (struct ui_file *, int indent, struct die_info *);
1161 static void dump_die_for_error (struct die_info *);
1163 static void dump_die_1 (struct ui_file *, int level, int max_level,
1166 /*static*/ void dump_die (struct die_info *, int max_level);
1168 static void store_in_ref_table (struct die_info *,
1169 struct dwarf2_cu *);
1171 static int is_ref_attr (struct attribute *);
1173 static unsigned int dwarf2_get_ref_die_offset (struct attribute *);
1175 static LONGEST dwarf2_get_attr_constant_value (struct attribute *, int);
1177 static struct die_info *follow_die_ref_or_sig (struct die_info *,
1179 struct dwarf2_cu **);
1181 static struct die_info *follow_die_ref (struct die_info *,
1183 struct dwarf2_cu **);
1185 static struct die_info *follow_die_sig (struct die_info *,
1187 struct dwarf2_cu **);
1189 static void read_signatured_type_at_offset (struct objfile *objfile,
1190 unsigned int offset);
1192 static void read_signatured_type (struct objfile *,
1193 struct signatured_type *type_sig);
1195 /* memory allocation interface */
1197 static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
1199 static struct abbrev_info *dwarf_alloc_abbrev (struct dwarf2_cu *);
1201 static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int);
1203 static void initialize_cu_func_list (struct dwarf2_cu *);
1205 static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR,
1206 struct dwarf2_cu *);
1208 static void dwarf_decode_macros (struct line_header *, unsigned int,
1209 char *, bfd *, struct dwarf2_cu *);
1211 static int attr_form_is_block (struct attribute *);
1213 static int attr_form_is_section_offset (struct attribute *);
1215 static int attr_form_is_constant (struct attribute *);
1217 static void dwarf2_symbol_mark_computed (struct attribute *attr,
1219 struct dwarf2_cu *cu);
1221 static gdb_byte *skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
1222 struct abbrev_info *abbrev,
1223 struct dwarf2_cu *cu);
1225 static void free_stack_comp_unit (void *);
1227 static hashval_t partial_die_hash (const void *item);
1229 static int partial_die_eq (const void *item_lhs, const void *item_rhs);
1231 static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
1232 (unsigned int offset, struct objfile *objfile);
1234 static struct dwarf2_per_cu_data *dwarf2_find_comp_unit
1235 (unsigned int offset, struct objfile *objfile);
1237 static struct dwarf2_cu *alloc_one_comp_unit (struct objfile *objfile);
1239 static void free_one_comp_unit (void *);
1241 static void free_cached_comp_units (void *);
1243 static void age_cached_comp_units (void);
1245 static void free_one_cached_comp_unit (void *);
1247 static struct type *set_die_type (struct die_info *, struct type *,
1248 struct dwarf2_cu *);
1250 static void create_all_comp_units (struct objfile *);
1252 static int create_debug_types_hash_table (struct objfile *objfile);
1254 static void load_full_comp_unit (struct dwarf2_per_cu_data *,
1257 static void process_full_comp_unit (struct dwarf2_per_cu_data *);
1259 static void dwarf2_add_dependence (struct dwarf2_cu *,
1260 struct dwarf2_per_cu_data *);
1262 static void dwarf2_mark (struct dwarf2_cu *);
1264 static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
1266 static struct type *get_die_type_at_offset (unsigned int,
1267 struct dwarf2_per_cu_data *per_cu);
1269 static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu);
1271 static void dwarf2_release_queue (void *dummy);
1273 static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu,
1274 struct objfile *objfile);
1276 static void process_queue (struct objfile *objfile);
1278 static void find_file_and_directory (struct die_info *die,
1279 struct dwarf2_cu *cu,
1280 char **name, char **comp_dir);
1282 static char *file_full_name (int file, struct line_header *lh,
1283 const char *comp_dir);
1285 static gdb_byte *partial_read_comp_unit_head (struct comp_unit_head *header,
1288 unsigned int buffer_size,
1291 static void init_cu_die_reader (struct die_reader_specs *reader,
1292 struct dwarf2_cu *cu);
1294 static htab_t allocate_signatured_type_table (struct objfile *objfile);
1298 /* Convert VALUE between big- and little-endian. */
1300 byte_swap (offset_type value)
1304 result = (value & 0xff) << 24;
1305 result |= (value & 0xff00) << 8;
1306 result |= (value & 0xff0000) >> 8;
1307 result |= (value & 0xff000000) >> 24;
1311 #define MAYBE_SWAP(V) byte_swap (V)
1314 #define MAYBE_SWAP(V) (V)
1315 #endif /* WORDS_BIGENDIAN */
1317 /* The suffix for an index file. */
1318 #define INDEX_SUFFIX ".gdb-index"
1320 static const char *dwarf2_physname (char *name, struct die_info *die,
1321 struct dwarf2_cu *cu);
1323 /* Try to locate the sections we need for DWARF 2 debugging
1324 information and return true if we have enough to do something. */
1327 dwarf2_has_info (struct objfile *objfile)
1329 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
1330 if (!dwarf2_per_objfile)
1332 /* Initialize per-objfile state. */
1333 struct dwarf2_per_objfile *data
1334 = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
1336 memset (data, 0, sizeof (*data));
1337 set_objfile_data (objfile, dwarf2_objfile_data_key, data);
1338 dwarf2_per_objfile = data;
1340 bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL);
1341 dwarf2_per_objfile->objfile = objfile;
1343 return (dwarf2_per_objfile->info.asection != NULL
1344 && dwarf2_per_objfile->abbrev.asection != NULL);
1347 /* When loading sections, we can either look for ".<name>", or for
1348 * ".z<name>", which indicates a compressed section. */
1351 section_is_p (const char *section_name, const char *name)
1353 return (section_name[0] == '.'
1354 && (strcmp (section_name + 1, name) == 0
1355 || (section_name[1] == 'z'
1356 && strcmp (section_name + 2, name) == 0)));
1359 /* This function is mapped across the sections and remembers the
1360 offset and size of each of the debugging sections we are interested
1364 dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr)
1366 if (section_is_p (sectp->name, INFO_SECTION))
1368 dwarf2_per_objfile->info.asection = sectp;
1369 dwarf2_per_objfile->info.size = bfd_get_section_size (sectp);
1371 else if (section_is_p (sectp->name, ABBREV_SECTION))
1373 dwarf2_per_objfile->abbrev.asection = sectp;
1374 dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp);
1376 else if (section_is_p (sectp->name, LINE_SECTION))
1378 dwarf2_per_objfile->line.asection = sectp;
1379 dwarf2_per_objfile->line.size = bfd_get_section_size (sectp);
1381 else if (section_is_p (sectp->name, LOC_SECTION))
1383 dwarf2_per_objfile->loc.asection = sectp;
1384 dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp);
1386 else if (section_is_p (sectp->name, MACINFO_SECTION))
1388 dwarf2_per_objfile->macinfo.asection = sectp;
1389 dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp);
1391 else if (section_is_p (sectp->name, STR_SECTION))
1393 dwarf2_per_objfile->str.asection = sectp;
1394 dwarf2_per_objfile->str.size = bfd_get_section_size (sectp);
1396 else if (section_is_p (sectp->name, FRAME_SECTION))
1398 dwarf2_per_objfile->frame.asection = sectp;
1399 dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp);
1401 else if (section_is_p (sectp->name, EH_FRAME_SECTION))
1403 flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
1405 if (aflag & SEC_HAS_CONTENTS)
1407 dwarf2_per_objfile->eh_frame.asection = sectp;
1408 dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp);
1411 else if (section_is_p (sectp->name, RANGES_SECTION))
1413 dwarf2_per_objfile->ranges.asection = sectp;
1414 dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp);
1416 else if (section_is_p (sectp->name, TYPES_SECTION))
1418 dwarf2_per_objfile->types.asection = sectp;
1419 dwarf2_per_objfile->types.size = bfd_get_section_size (sectp);
1421 else if (section_is_p (sectp->name, GDB_INDEX_SECTION))
1423 dwarf2_per_objfile->gdb_index.asection = sectp;
1424 dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp);
1427 if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
1428 && bfd_section_vma (abfd, sectp) == 0)
1429 dwarf2_per_objfile->has_section_at_zero = 1;
1432 /* Decompress a section that was compressed using zlib. Store the
1433 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1436 zlib_decompress_section (struct objfile *objfile, asection *sectp,
1437 gdb_byte **outbuf, bfd_size_type *outsize)
1439 bfd *abfd = objfile->obfd;
1441 error (_("Support for zlib-compressed DWARF data (from '%s') "
1442 "is disabled in this copy of GDB"),
1443 bfd_get_filename (abfd));
1445 bfd_size_type compressed_size = bfd_get_section_size (sectp);
1446 gdb_byte *compressed_buffer = xmalloc (compressed_size);
1447 struct cleanup *cleanup = make_cleanup (xfree, compressed_buffer);
1448 bfd_size_type uncompressed_size;
1449 gdb_byte *uncompressed_buffer;
1452 int header_size = 12;
1454 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1455 || bfd_bread (compressed_buffer, compressed_size, abfd) != compressed_size)
1456 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1457 bfd_get_filename (abfd));
1459 /* Read the zlib header. In this case, it should be "ZLIB" followed
1460 by the uncompressed section size, 8 bytes in big-endian order. */
1461 if (compressed_size < header_size
1462 || strncmp (compressed_buffer, "ZLIB", 4) != 0)
1463 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1464 bfd_get_filename (abfd));
1465 uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8;
1466 uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8;
1467 uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8;
1468 uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8;
1469 uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8;
1470 uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8;
1471 uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8;
1472 uncompressed_size += compressed_buffer[11];
1474 /* It is possible the section consists of several compressed
1475 buffers concatenated together, so we uncompress in a loop. */
1479 strm.avail_in = compressed_size - header_size;
1480 strm.next_in = (Bytef*) compressed_buffer + header_size;
1481 strm.avail_out = uncompressed_size;
1482 uncompressed_buffer = obstack_alloc (&objfile->objfile_obstack,
1484 rc = inflateInit (&strm);
1485 while (strm.avail_in > 0)
1488 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1489 bfd_get_filename (abfd), rc);
1490 strm.next_out = ((Bytef*) uncompressed_buffer
1491 + (uncompressed_size - strm.avail_out));
1492 rc = inflate (&strm, Z_FINISH);
1493 if (rc != Z_STREAM_END)
1494 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1495 bfd_get_filename (abfd), rc);
1496 rc = inflateReset (&strm);
1498 rc = inflateEnd (&strm);
1500 || strm.avail_out != 0)
1501 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1502 bfd_get_filename (abfd), rc);
1504 do_cleanups (cleanup);
1505 *outbuf = uncompressed_buffer;
1506 *outsize = uncompressed_size;
1510 /* Read the contents of the section SECTP from object file specified by
1511 OBJFILE, store info about the section into INFO.
1512 If the section is compressed, uncompress it before returning. */
1515 dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info)
1517 bfd *abfd = objfile->obfd;
1518 asection *sectp = info->asection;
1519 gdb_byte *buf, *retbuf;
1520 unsigned char header[4];
1524 info->buffer = NULL;
1525 info->was_mmapped = 0;
1528 if (info->asection == NULL || info->size == 0)
1531 /* Check if the file has a 4-byte header indicating compression. */
1532 if (info->size > sizeof (header)
1533 && bfd_seek (abfd, sectp->filepos, SEEK_SET) == 0
1534 && bfd_bread (header, sizeof (header), abfd) == sizeof (header))
1536 /* Upon decompression, update the buffer and its size. */
1537 if (strncmp (header, "ZLIB", sizeof (header)) == 0)
1539 zlib_decompress_section (objfile, sectp, &info->buffer,
1547 pagesize = getpagesize ();
1549 /* Only try to mmap sections which are large enough: we don't want to
1550 waste space due to fragmentation. Also, only try mmap for sections
1551 without relocations. */
1553 if (info->size > 4 * pagesize && (sectp->flags & SEC_RELOC) == 0)
1555 off_t pg_offset = sectp->filepos & ~(pagesize - 1);
1556 size_t map_length = info->size + sectp->filepos - pg_offset;
1557 caddr_t retbuf = bfd_mmap (abfd, 0, map_length, PROT_READ,
1558 MAP_PRIVATE, pg_offset);
1560 if (retbuf != MAP_FAILED)
1562 info->was_mmapped = 1;
1563 info->buffer = retbuf + (sectp->filepos & (pagesize - 1)) ;
1564 #if HAVE_POSIX_MADVISE
1565 posix_madvise (retbuf, map_length, POSIX_MADV_WILLNEED);
1572 /* If we get here, we are a normal, not-compressed section. */
1574 = obstack_alloc (&objfile->objfile_obstack, info->size);
1576 /* When debugging .o files, we may need to apply relocations; see
1577 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1578 We never compress sections in .o files, so we only need to
1579 try this when the section is not compressed. */
1580 retbuf = symfile_relocate_debug_section (objfile, sectp, buf);
1583 info->buffer = retbuf;
1587 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1588 || bfd_bread (buf, info->size, abfd) != info->size)
1589 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1590 bfd_get_filename (abfd));
1593 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1597 dwarf2_get_section_info (struct objfile *objfile, const char *section_name,
1598 asection **sectp, gdb_byte **bufp,
1599 bfd_size_type *sizep)
1601 struct dwarf2_per_objfile *data
1602 = objfile_data (objfile, dwarf2_objfile_data_key);
1603 struct dwarf2_section_info *info;
1605 /* We may see an objfile without any DWARF, in which case we just
1614 if (section_is_p (section_name, EH_FRAME_SECTION))
1615 info = &data->eh_frame;
1616 else if (section_is_p (section_name, FRAME_SECTION))
1617 info = &data->frame;
1619 gdb_assert_not_reached ("unexpected section");
1621 if (info->asection != NULL && info->size != 0 && info->buffer == NULL)
1622 /* We haven't read this section in yet. Do it now. */
1623 dwarf2_read_section (objfile, info);
1625 *sectp = info->asection;
1626 *bufp = info->buffer;
1627 *sizep = info->size;
1632 /* Read in the symbols for PER_CU. OBJFILE is the objfile from which
1635 dw2_do_instantiate_symtab (struct objfile *objfile,
1636 struct dwarf2_per_cu_data *per_cu)
1638 struct cleanup *back_to;
1640 back_to = make_cleanup (dwarf2_release_queue, NULL);
1642 queue_comp_unit (per_cu, objfile);
1644 if (per_cu->from_debug_types)
1645 read_signatured_type_at_offset (objfile, per_cu->offset);
1647 load_full_comp_unit (per_cu, objfile);
1649 process_queue (objfile);
1651 /* Age the cache, releasing compilation units that have not
1652 been used recently. */
1653 age_cached_comp_units ();
1655 do_cleanups (back_to);
1658 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
1659 the objfile from which this CU came. Returns the resulting symbol
1661 static struct symtab *
1662 dw2_instantiate_symtab (struct objfile *objfile,
1663 struct dwarf2_per_cu_data *per_cu)
1665 if (!per_cu->v.quick->symtab)
1667 struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL);
1668 increment_reading_symtab ();
1669 dw2_do_instantiate_symtab (objfile, per_cu);
1670 do_cleanups (back_to);
1672 return per_cu->v.quick->symtab;
1675 /* Return the CU given its index. */
1676 static struct dwarf2_per_cu_data *
1677 dw2_get_cu (int index)
1679 if (index >= dwarf2_per_objfile->n_comp_units)
1681 index -= dwarf2_per_objfile->n_comp_units;
1682 return dwarf2_per_objfile->type_comp_units[index];
1684 return dwarf2_per_objfile->all_comp_units[index];
1687 /* A helper function that knows how to read a 64-bit value in a way
1688 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
1691 extract_cu_value (const char *bytes, ULONGEST *result)
1693 if (sizeof (ULONGEST) < 8)
1697 /* Ignore the upper 4 bytes if they are all zero. */
1698 for (i = 0; i < 4; ++i)
1699 if (bytes[i + 4] != 0)
1702 *result = extract_unsigned_integer (bytes, 4, BFD_ENDIAN_LITTLE);
1705 *result = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE);
1709 /* Read the CU list from the mapped index, and use it to create all
1710 the CU objects for this objfile. Return 0 if something went wrong,
1711 1 if everything went ok. */
1713 create_cus_from_index (struct objfile *objfile, const gdb_byte *cu_list,
1714 offset_type cu_list_elements)
1718 dwarf2_per_objfile->n_comp_units = cu_list_elements / 2;
1719 dwarf2_per_objfile->all_comp_units
1720 = obstack_alloc (&objfile->objfile_obstack,
1721 dwarf2_per_objfile->n_comp_units
1722 * sizeof (struct dwarf2_per_cu_data *));
1724 for (i = 0; i < cu_list_elements; i += 2)
1726 struct dwarf2_per_cu_data *the_cu;
1727 ULONGEST offset, length;
1729 if (!extract_cu_value (cu_list, &offset)
1730 || !extract_cu_value (cu_list + 8, &length))
1734 the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack,
1735 struct dwarf2_per_cu_data);
1736 the_cu->offset = offset;
1737 the_cu->length = length;
1738 the_cu->objfile = objfile;
1739 the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
1740 struct dwarf2_per_cu_quick_data);
1741 dwarf2_per_objfile->all_comp_units[i / 2] = the_cu;
1747 /* Create the signatured type hash table from the index. */
1750 create_signatured_type_table_from_index (struct objfile *objfile,
1751 const gdb_byte *bytes,
1752 offset_type elements)
1755 htab_t sig_types_hash;
1757 dwarf2_per_objfile->n_type_comp_units = elements / 3;
1758 dwarf2_per_objfile->type_comp_units
1759 = obstack_alloc (&objfile->objfile_obstack,
1760 dwarf2_per_objfile->n_type_comp_units
1761 * sizeof (struct dwarf2_per_cu_data *));
1763 sig_types_hash = allocate_signatured_type_table (objfile);
1765 for (i = 0; i < elements; i += 3)
1767 struct signatured_type *type_sig;
1768 ULONGEST offset, type_offset, signature;
1771 if (!extract_cu_value (bytes, &offset)
1772 || !extract_cu_value (bytes + 8, &type_offset))
1774 signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE);
1777 type_sig = OBSTACK_ZALLOC (&objfile->objfile_obstack,
1778 struct signatured_type);
1779 type_sig->signature = signature;
1780 type_sig->offset = offset;
1781 type_sig->type_offset = type_offset;
1782 type_sig->per_cu.from_debug_types = 1;
1783 type_sig->per_cu.offset = offset;
1784 type_sig->per_cu.objfile = objfile;
1785 type_sig->per_cu.v.quick
1786 = OBSTACK_ZALLOC (&objfile->objfile_obstack,
1787 struct dwarf2_per_cu_quick_data);
1789 slot = htab_find_slot (sig_types_hash, type_sig, INSERT);
1792 dwarf2_per_objfile->type_comp_units[i / 3] = &type_sig->per_cu;
1795 dwarf2_per_objfile->signatured_types = sig_types_hash;
1800 /* Read the address map data from the mapped index, and use it to
1801 populate the objfile's psymtabs_addrmap. */
1803 create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index)
1805 const gdb_byte *iter, *end;
1806 struct obstack temp_obstack;
1807 struct addrmap *mutable_map;
1808 struct cleanup *cleanup;
1811 obstack_init (&temp_obstack);
1812 cleanup = make_cleanup_obstack_free (&temp_obstack);
1813 mutable_map = addrmap_create_mutable (&temp_obstack);
1815 iter = index->address_table;
1816 end = iter + index->address_table_size;
1818 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1822 ULONGEST hi, lo, cu_index;
1823 lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
1825 hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
1827 cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE);
1830 addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1,
1831 dw2_get_cu (cu_index));
1834 objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map,
1835 &objfile->objfile_obstack);
1836 do_cleanups (cleanup);
1839 /* The hash function for strings in the mapped index. This is the
1840 same as the hashtab.c hash function, but we keep a separate copy to
1841 maintain control over the implementation. This is necessary
1842 because the hash function is tied to the format of the mapped index
1845 mapped_index_string_hash (const void *p)
1847 const unsigned char *str = (const unsigned char *) p;
1851 while ((c = *str++) != 0)
1852 r = r * 67 + c - 113;
1857 /* Find a slot in the mapped index INDEX for the object named NAME.
1858 If NAME is found, set *VEC_OUT to point to the CU vector in the
1859 constant pool and return 1. If NAME cannot be found, return 0. */
1861 find_slot_in_mapped_hash (struct mapped_index *index, const char *name,
1862 offset_type **vec_out)
1864 offset_type hash = mapped_index_string_hash (name);
1865 offset_type slot, step;
1867 slot = hash & (index->index_table_slots - 1);
1868 step = ((hash * 17) & (index->index_table_slots - 1)) | 1;
1872 /* Convert a slot number to an offset into the table. */
1873 offset_type i = 2 * slot;
1875 if (index->index_table[i] == 0 && index->index_table[i + 1] == 0)
1878 str = index->constant_pool + MAYBE_SWAP (index->index_table[i]);
1879 if (!strcmp (name, str))
1881 *vec_out = (offset_type *) (index->constant_pool
1882 + MAYBE_SWAP (index->index_table[i + 1]));
1886 slot = (slot + step) & (index->index_table_slots - 1);
1890 /* Read the index file. If everything went ok, initialize the "quick"
1891 elements of all the CUs and return 1. Otherwise, return 0. */
1893 dwarf2_read_index (struct objfile *objfile)
1896 struct mapped_index *map;
1897 offset_type *metadata;
1898 const gdb_byte *cu_list;
1899 const gdb_byte *types_list = NULL;
1900 offset_type version, cu_list_elements;
1901 offset_type types_list_elements = 0;
1904 if (dwarf2_per_objfile->gdb_index.asection == NULL
1905 || dwarf2_per_objfile->gdb_index.size == 0)
1907 dwarf2_read_section (objfile, &dwarf2_per_objfile->gdb_index);
1909 addr = dwarf2_per_objfile->gdb_index.buffer;
1910 /* Version check. */
1911 version = MAYBE_SWAP (*(offset_type *) addr);
1914 /* Index version 1 neglected to account for .debug_types. So,
1915 if we see .debug_types, we cannot use this index. */
1916 if (dwarf2_per_objfile->types.asection != NULL
1917 && dwarf2_per_objfile->types.size != 0)
1920 else if (version != 2)
1923 map = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct mapped_index);
1924 map->total_size = dwarf2_per_objfile->gdb_index.size;
1926 metadata = (offset_type *) (addr + sizeof (offset_type));
1929 cu_list = addr + MAYBE_SWAP (metadata[i]);
1930 cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i]))
1936 types_list = addr + MAYBE_SWAP (metadata[i]);
1937 types_list_elements = ((MAYBE_SWAP (metadata[i + 1])
1938 - MAYBE_SWAP (metadata[i]))
1943 map->address_table = addr + MAYBE_SWAP (metadata[i]);
1944 map->address_table_size = (MAYBE_SWAP (metadata[i + 1])
1945 - MAYBE_SWAP (metadata[i]));
1948 map->index_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i]));
1949 map->index_table_slots = ((MAYBE_SWAP (metadata[i + 1])
1950 - MAYBE_SWAP (metadata[i]))
1951 / (2 * sizeof (offset_type)));
1954 map->constant_pool = addr + MAYBE_SWAP (metadata[i]);
1956 if (!create_cus_from_index (objfile, cu_list, cu_list_elements))
1960 && types_list_elements
1961 && !create_signatured_type_table_from_index (objfile, types_list,
1962 types_list_elements))
1965 create_addrmap_from_index (objfile, map);
1967 dwarf2_per_objfile->index_table = map;
1968 dwarf2_per_objfile->using_index = 1;
1973 /* A helper for the "quick" functions which sets the global
1974 dwarf2_per_objfile according to OBJFILE. */
1976 dw2_setup (struct objfile *objfile)
1978 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
1979 gdb_assert (dwarf2_per_objfile);
1982 /* A helper for the "quick" functions which attempts to read the line
1983 table for THIS_CU. */
1985 dw2_require_line_header (struct objfile *objfile,
1986 struct dwarf2_per_cu_data *this_cu)
1988 bfd *abfd = objfile->obfd;
1989 struct line_header *lh = NULL;
1990 struct attribute *attr;
1991 struct cleanup *cleanups;
1992 struct die_info *comp_unit_die;
1993 struct dwarf2_section_info* sec;
1994 gdb_byte *beg_of_comp_unit, *info_ptr, *buffer;
1995 int has_children, i;
1996 struct dwarf2_cu cu;
1997 unsigned int bytes_read, buffer_size;
1998 struct die_reader_specs reader_specs;
1999 char *name, *comp_dir;
2001 if (this_cu->v.quick->read_lines)
2003 this_cu->v.quick->read_lines = 1;
2005 memset (&cu, 0, sizeof (cu));
2006 cu.objfile = objfile;
2007 obstack_init (&cu.comp_unit_obstack);
2009 cleanups = make_cleanup (free_stack_comp_unit, &cu);
2011 if (this_cu->from_debug_types)
2012 sec = &dwarf2_per_objfile->types;
2014 sec = &dwarf2_per_objfile->info;
2015 dwarf2_read_section (objfile, sec);
2016 buffer_size = sec->size;
2017 buffer = sec->buffer;
2018 info_ptr = buffer + this_cu->offset;
2019 beg_of_comp_unit = info_ptr;
2021 info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
2022 buffer, buffer_size,
2025 /* Complete the cu_header. */
2026 cu.header.offset = beg_of_comp_unit - buffer;
2027 cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
2030 cu.per_cu = this_cu;
2032 dwarf2_read_abbrevs (abfd, &cu);
2033 make_cleanup (dwarf2_free_abbrev_table, &cu);
2035 if (this_cu->from_debug_types)
2036 info_ptr += 8 /*signature*/ + cu.header.offset_size;
2037 init_cu_die_reader (&reader_specs, &cu);
2038 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
2041 attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, &cu);
2044 unsigned int line_offset = DW_UNSND (attr);
2045 lh = dwarf_decode_line_header (line_offset, abfd, &cu);
2049 do_cleanups (cleanups);
2053 find_file_and_directory (comp_unit_die, &cu, &name, &comp_dir);
2055 this_cu->v.quick->lines = lh;
2057 this_cu->v.quick->file_names
2058 = obstack_alloc (&objfile->objfile_obstack,
2059 lh->num_file_names * sizeof (char *));
2060 for (i = 0; i < lh->num_file_names; ++i)
2061 this_cu->v.quick->file_names[i] = file_full_name (i + 1, lh, comp_dir);
2063 do_cleanups (cleanups);
2066 /* A helper for the "quick" functions which computes and caches the
2067 real path for a given file name from the line table.
2068 dw2_require_line_header must have been called before this is
2071 dw2_require_full_path (struct objfile *objfile,
2072 struct dwarf2_per_cu_data *per_cu,
2075 if (!per_cu->v.quick->full_names)
2076 per_cu->v.quick->full_names
2077 = OBSTACK_CALLOC (&objfile->objfile_obstack,
2078 per_cu->v.quick->lines->num_file_names,
2081 if (!per_cu->v.quick->full_names[index])
2082 per_cu->v.quick->full_names[index]
2083 = gdb_realpath (per_cu->v.quick->file_names[index]);
2085 return per_cu->v.quick->full_names[index];
2088 static struct symtab *
2089 dw2_find_last_source_symtab (struct objfile *objfile)
2092 dw2_setup (objfile);
2093 index = dwarf2_per_objfile->n_comp_units - 1;
2094 return dw2_instantiate_symtab (objfile, dw2_get_cu (index));
2098 dw2_forget_cached_source_info (struct objfile *objfile)
2102 dw2_setup (objfile);
2103 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2104 + dwarf2_per_objfile->n_type_comp_units); ++i)
2106 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2108 if (per_cu->v.quick->full_names)
2112 for (j = 0; j < per_cu->v.quick->lines->num_file_names; ++j)
2113 xfree ((void *) per_cu->v.quick->full_names[j]);
2119 dw2_lookup_symtab (struct objfile *objfile, const char *name,
2120 const char *full_path, const char *real_path,
2121 struct symtab **result)
2124 int check_basename = lbasename (name) == name;
2125 struct dwarf2_per_cu_data *base_cu = NULL;
2127 dw2_setup (objfile);
2128 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2129 + dwarf2_per_objfile->n_type_comp_units); ++i)
2132 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2134 if (per_cu->v.quick->symtab)
2137 dw2_require_line_header (objfile, per_cu);
2138 if (!per_cu->v.quick->lines)
2141 for (j = 0; j < per_cu->v.quick->lines->num_file_names; ++j)
2143 const char *this_name = per_cu->v.quick->file_names[j];
2145 if (FILENAME_CMP (name, this_name) == 0)
2147 *result = dw2_instantiate_symtab (objfile, per_cu);
2151 if (check_basename && ! base_cu
2152 && FILENAME_CMP (lbasename (this_name), name) == 0)
2155 if (full_path != NULL)
2157 const char *this_full_name = dw2_require_full_path (objfile,
2161 && FILENAME_CMP (full_path, this_full_name) == 0)
2163 *result = dw2_instantiate_symtab (objfile, per_cu);
2168 if (real_path != NULL)
2170 const char *this_full_name = dw2_require_full_path (objfile,
2173 if (this_full_name != NULL)
2175 char *rp = gdb_realpath (this_full_name);
2176 if (rp != NULL && FILENAME_CMP (real_path, rp) == 0)
2179 *result = dw2_instantiate_symtab (objfile, per_cu);
2190 *result = dw2_instantiate_symtab (objfile, base_cu);
2197 static struct symtab *
2198 dw2_lookup_symbol (struct objfile *objfile, int block_index,
2199 const char *name, domain_enum domain)
2201 /* We do all the work in the pre_expand_symtabs_matching hook
2206 /* A helper function that expands all symtabs that hold an object
2209 dw2_do_expand_symtabs_matching (struct objfile *objfile, const char *name)
2211 dw2_setup (objfile);
2213 if (dwarf2_per_objfile->index_table)
2217 if (find_slot_in_mapped_hash (dwarf2_per_objfile->index_table,
2220 offset_type i, len = MAYBE_SWAP (*vec);
2221 for (i = 0; i < len; ++i)
2223 offset_type cu_index = MAYBE_SWAP (vec[i + 1]);
2224 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (cu_index);
2226 dw2_instantiate_symtab (objfile, per_cu);
2233 dw2_pre_expand_symtabs_matching (struct objfile *objfile,
2234 int kind, const char *name,
2237 dw2_do_expand_symtabs_matching (objfile, name);
2241 dw2_print_stats (struct objfile *objfile)
2245 dw2_setup (objfile);
2247 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2248 + dwarf2_per_objfile->n_type_comp_units); ++i)
2250 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2252 if (!per_cu->v.quick->symtab)
2255 printf_filtered (_(" Number of unread CUs: %d\n"), count);
2259 dw2_dump (struct objfile *objfile)
2261 /* Nothing worth printing. */
2265 dw2_relocate (struct objfile *objfile, struct section_offsets *new_offsets,
2266 struct section_offsets *delta)
2268 /* There's nothing to relocate here. */
2272 dw2_expand_symtabs_for_function (struct objfile *objfile,
2273 const char *func_name)
2275 dw2_do_expand_symtabs_matching (objfile, func_name);
2279 dw2_expand_all_symtabs (struct objfile *objfile)
2283 dw2_setup (objfile);
2285 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2286 + dwarf2_per_objfile->n_type_comp_units); ++i)
2288 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2290 dw2_instantiate_symtab (objfile, per_cu);
2295 dw2_expand_symtabs_with_filename (struct objfile *objfile,
2296 const char *filename)
2300 dw2_setup (objfile);
2301 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2302 + dwarf2_per_objfile->n_type_comp_units); ++i)
2305 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2307 if (per_cu->v.quick->symtab)
2310 dw2_require_line_header (objfile, per_cu);
2311 if (!per_cu->v.quick->lines)
2314 for (j = 0; j < per_cu->v.quick->lines->num_file_names; ++j)
2316 const char *this_name = per_cu->v.quick->file_names[j];
2317 if (strcmp (this_name, filename) == 0)
2319 dw2_instantiate_symtab (objfile, per_cu);
2327 dw2_find_symbol_file (struct objfile *objfile, const char *name)
2329 struct dwarf2_per_cu_data *per_cu;
2332 dw2_setup (objfile);
2334 if (!dwarf2_per_objfile->index_table)
2337 if (!find_slot_in_mapped_hash (dwarf2_per_objfile->index_table,
2341 /* Note that this just looks at the very first one named NAME -- but
2342 actually we are looking for a function. find_main_filename
2343 should be rewritten so that it doesn't require a custom hook. It
2344 could just use the ordinary symbol tables. */
2345 /* vec[0] is the length, which must always be >0. */
2346 per_cu = dw2_get_cu (MAYBE_SWAP (vec[1]));
2348 dw2_require_line_header (objfile, per_cu);
2349 if (!per_cu->v.quick->lines)
2352 return per_cu->v.quick->file_names[per_cu->v.quick->lines->num_file_names - 1];
2356 dw2_map_ada_symtabs (struct objfile *objfile,
2357 int (*wild_match) (const char *, int, const char *),
2358 int (*is_name_suffix) (const char *),
2359 void (*callback) (struct objfile *,
2360 struct symtab *, void *),
2361 const char *name, int global,
2362 domain_enum namespace, int wild,
2365 /* For now, we don't support Ada, so this function can't be
2367 internal_error (__FILE__, __LINE__,
2368 _("map_ada_symtabs called via index method"));
2372 dw2_expand_symtabs_matching (struct objfile *objfile,
2373 int (*file_matcher) (const char *, void *),
2374 int (*name_matcher) (const char *, void *),
2381 dw2_setup (objfile);
2382 if (!dwarf2_per_objfile->index_table)
2385 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2386 + dwarf2_per_objfile->n_type_comp_units); ++i)
2389 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2391 per_cu->v.quick->mark = 0;
2392 if (per_cu->v.quick->symtab)
2395 dw2_require_line_header (objfile, per_cu);
2396 if (!per_cu->v.quick->lines)
2399 for (j = 0; j < per_cu->v.quick->lines->num_file_names; ++j)
2401 if (file_matcher (per_cu->v.quick->file_names[j], data))
2403 per_cu->v.quick->mark = 1;
2410 iter < dwarf2_per_objfile->index_table->index_table_slots;
2413 offset_type idx = 2 * iter;
2415 offset_type *vec, vec_len, vec_idx;
2417 if (dwarf2_per_objfile->index_table->index_table[idx] == 0
2418 && dwarf2_per_objfile->index_table->index_table[idx + 1] == 0)
2421 name = (dwarf2_per_objfile->index_table->constant_pool
2422 + dwarf2_per_objfile->index_table->index_table[idx]);
2424 if (! (*name_matcher) (name, data))
2427 /* The name was matched, now expand corresponding CUs that were
2429 vec = (offset_type *) (dwarf2_per_objfile->index_table->constant_pool
2430 + dwarf2_per_objfile->index_table->index_table[idx + 1]);
2431 vec_len = MAYBE_SWAP (vec[0]);
2432 for (vec_idx = 0; vec_idx < vec_len; ++vec_idx)
2434 struct dwarf2_per_cu_data *per_cu;
2436 per_cu = dw2_get_cu (MAYBE_SWAP (vec[vec_idx + 1]));
2437 if (per_cu->v.quick->mark)
2438 dw2_instantiate_symtab (objfile, per_cu);
2443 static struct symtab *
2444 dw2_find_pc_sect_symtab (struct objfile *objfile,
2445 struct minimal_symbol *msymbol,
2447 struct obj_section *section,
2450 struct dwarf2_per_cu_data *data;
2452 dw2_setup (objfile);
2454 if (!objfile->psymtabs_addrmap)
2457 data = addrmap_find (objfile->psymtabs_addrmap, pc);
2461 if (warn_if_readin && data->v.quick->symtab)
2462 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
2463 paddress (get_objfile_arch (objfile), pc));
2465 return dw2_instantiate_symtab (objfile, data);
2469 dw2_map_symbol_names (struct objfile *objfile,
2470 void (*fun) (const char *, void *),
2474 dw2_setup (objfile);
2476 if (!dwarf2_per_objfile->index_table)
2480 iter < dwarf2_per_objfile->index_table->index_table_slots;
2483 offset_type idx = 2 * iter;
2485 offset_type *vec, vec_len, vec_idx;
2487 if (dwarf2_per_objfile->index_table->index_table[idx] == 0
2488 && dwarf2_per_objfile->index_table->index_table[idx + 1] == 0)
2491 name = (dwarf2_per_objfile->index_table->constant_pool
2492 + dwarf2_per_objfile->index_table->index_table[idx]);
2494 (*fun) (name, data);
2499 dw2_map_symbol_filenames (struct objfile *objfile,
2500 void (*fun) (const char *, const char *, void *),
2505 dw2_setup (objfile);
2506 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2507 + dwarf2_per_objfile->n_type_comp_units); ++i)
2510 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2512 if (per_cu->v.quick->symtab)
2515 dw2_require_line_header (objfile, per_cu);
2516 if (!per_cu->v.quick->lines)
2519 for (j = 0; j < per_cu->v.quick->lines->num_file_names; ++j)
2521 const char *this_full_name = dw2_require_full_path (objfile, per_cu,
2523 (*fun) (per_cu->v.quick->file_names[j], this_full_name, data);
2529 dw2_has_symbols (struct objfile *objfile)
2534 const struct quick_symbol_functions dwarf2_gdb_index_functions =
2537 dw2_find_last_source_symtab,
2538 dw2_forget_cached_source_info,
2541 dw2_pre_expand_symtabs_matching,
2545 dw2_expand_symtabs_for_function,
2546 dw2_expand_all_symtabs,
2547 dw2_expand_symtabs_with_filename,
2548 dw2_find_symbol_file,
2549 dw2_map_ada_symtabs,
2550 dw2_expand_symtabs_matching,
2551 dw2_find_pc_sect_symtab,
2552 dw2_map_symbol_names,
2553 dw2_map_symbol_filenames
2556 /* Initialize for reading DWARF for this objfile. Return 0 if this
2557 file will use psymtabs, or 1 if using the GNU index. */
2560 dwarf2_initialize_objfile (struct objfile *objfile)
2562 /* If we're about to read full symbols, don't bother with the
2563 indices. In this case we also don't care if some other debug
2564 format is making psymtabs, because they are all about to be
2566 if ((objfile->flags & OBJF_READNOW))
2570 dwarf2_per_objfile->using_index = 1;
2571 create_all_comp_units (objfile);
2572 create_debug_types_hash_table (objfile);
2574 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2575 + dwarf2_per_objfile->n_type_comp_units); ++i)
2577 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2579 per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2580 struct dwarf2_per_cu_quick_data);
2583 /* Return 1 so that gdb sees the "quick" functions. However,
2584 these functions will be no-ops because we will have expanded
2589 if (dwarf2_read_index (objfile))
2592 dwarf2_build_psymtabs (objfile);
2598 /* Build a partial symbol table. */
2601 dwarf2_build_psymtabs (struct objfile *objfile)
2603 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
2605 init_psymbol_list (objfile, 1024);
2608 dwarf2_build_psymtabs_hard (objfile);
2611 /* Return TRUE if OFFSET is within CU_HEADER. */
2614 offset_in_cu_p (const struct comp_unit_head *cu_header, unsigned int offset)
2616 unsigned int bottom = cu_header->offset;
2617 unsigned int top = (cu_header->offset
2619 + cu_header->initial_length_size);
2621 return (offset >= bottom && offset < top);
2624 /* Read in the comp unit header information from the debug_info at info_ptr.
2625 NOTE: This leaves members offset, first_die_offset to be filled in
2629 read_comp_unit_head (struct comp_unit_head *cu_header,
2630 gdb_byte *info_ptr, bfd *abfd)
2633 unsigned int bytes_read;
2635 cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read);
2636 cu_header->initial_length_size = bytes_read;
2637 cu_header->offset_size = (bytes_read == 4) ? 4 : 8;
2638 info_ptr += bytes_read;
2639 cu_header->version = read_2_bytes (abfd, info_ptr);
2641 cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
2643 info_ptr += bytes_read;
2644 cu_header->addr_size = read_1_byte (abfd, info_ptr);
2646 signed_addr = bfd_get_sign_extend_vma (abfd);
2647 if (signed_addr < 0)
2648 internal_error (__FILE__, __LINE__,
2649 _("read_comp_unit_head: dwarf from non elf file"));
2650 cu_header->signed_addr_p = signed_addr;
2656 partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
2657 gdb_byte *buffer, unsigned int buffer_size,
2660 gdb_byte *beg_of_comp_unit = info_ptr;
2662 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
2664 if (header->version != 2 && header->version != 3 && header->version != 4)
2665 error (_("Dwarf Error: wrong version in compilation unit header "
2666 "(is %d, should be 2, 3, or 4) [in module %s]"), header->version,
2667 bfd_get_filename (abfd));
2669 if (header->abbrev_offset >= dwarf2_per_objfile->abbrev.size)
2670 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
2671 "(offset 0x%lx + 6) [in module %s]"),
2672 (long) header->abbrev_offset,
2673 (long) (beg_of_comp_unit - buffer),
2674 bfd_get_filename (abfd));
2676 if (beg_of_comp_unit + header->length + header->initial_length_size
2677 > buffer + buffer_size)
2678 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
2679 "(offset 0x%lx + 0) [in module %s]"),
2680 (long) header->length,
2681 (long) (beg_of_comp_unit - buffer),
2682 bfd_get_filename (abfd));
2687 /* Read in the types comp unit header information from .debug_types entry at
2688 types_ptr. The result is a pointer to one past the end of the header. */
2691 read_type_comp_unit_head (struct comp_unit_head *cu_header,
2692 ULONGEST *signature,
2693 gdb_byte *types_ptr, bfd *abfd)
2695 gdb_byte *initial_types_ptr = types_ptr;
2697 dwarf2_read_section (dwarf2_per_objfile->objfile,
2698 &dwarf2_per_objfile->types);
2699 cu_header->offset = types_ptr - dwarf2_per_objfile->types.buffer;
2701 types_ptr = read_comp_unit_head (cu_header, types_ptr, abfd);
2703 *signature = read_8_bytes (abfd, types_ptr);
2705 types_ptr += cu_header->offset_size;
2706 cu_header->first_die_offset = types_ptr - initial_types_ptr;
2711 /* Allocate a new partial symtab for file named NAME and mark this new
2712 partial symtab as being an include of PST. */
2715 dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
2716 struct objfile *objfile)
2718 struct partial_symtab *subpst = allocate_psymtab (name, objfile);
2720 subpst->section_offsets = pst->section_offsets;
2721 subpst->textlow = 0;
2722 subpst->texthigh = 0;
2724 subpst->dependencies = (struct partial_symtab **)
2725 obstack_alloc (&objfile->objfile_obstack,
2726 sizeof (struct partial_symtab *));
2727 subpst->dependencies[0] = pst;
2728 subpst->number_of_dependencies = 1;
2730 subpst->globals_offset = 0;
2731 subpst->n_global_syms = 0;
2732 subpst->statics_offset = 0;
2733 subpst->n_static_syms = 0;
2734 subpst->symtab = NULL;
2735 subpst->read_symtab = pst->read_symtab;
2738 /* No private part is necessary for include psymtabs. This property
2739 can be used to differentiate between such include psymtabs and
2740 the regular ones. */
2741 subpst->read_symtab_private = NULL;
2744 /* Read the Line Number Program data and extract the list of files
2745 included by the source file represented by PST. Build an include
2746 partial symtab for each of these included files. */
2749 dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
2750 struct die_info *die,
2751 struct partial_symtab *pst)
2753 struct objfile *objfile = cu->objfile;
2754 bfd *abfd = objfile->obfd;
2755 struct line_header *lh = NULL;
2756 struct attribute *attr;
2758 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
2761 unsigned int line_offset = DW_UNSND (attr);
2763 lh = dwarf_decode_line_header (line_offset, abfd, cu);
2766 return; /* No linetable, so no includes. */
2768 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
2769 dwarf_decode_lines (lh, pst->dirname, abfd, cu, pst);
2771 free_line_header (lh);
2775 hash_type_signature (const void *item)
2777 const struct signatured_type *type_sig = item;
2779 /* This drops the top 32 bits of the signature, but is ok for a hash. */
2780 return type_sig->signature;
2784 eq_type_signature (const void *item_lhs, const void *item_rhs)
2786 const struct signatured_type *lhs = item_lhs;
2787 const struct signatured_type *rhs = item_rhs;
2789 return lhs->signature == rhs->signature;
2792 /* Allocate a hash table for signatured types. */
2795 allocate_signatured_type_table (struct objfile *objfile)
2797 return htab_create_alloc_ex (41,
2798 hash_type_signature,
2801 &objfile->objfile_obstack,
2802 hashtab_obstack_allocate,
2803 dummy_obstack_deallocate);
2806 /* A helper function to add a signatured type CU to a list. */
2809 add_signatured_type_cu_to_list (void **slot, void *datum)
2811 struct signatured_type *sigt = *slot;
2812 struct dwarf2_per_cu_data ***datap = datum;
2814 **datap = &sigt->per_cu;
2820 /* Create the hash table of all entries in the .debug_types section.
2821 The result is zero if there is an error (e.g. missing .debug_types section),
2822 otherwise non-zero. */
2825 create_debug_types_hash_table (struct objfile *objfile)
2829 struct dwarf2_per_cu_data **iter;
2831 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
2832 info_ptr = dwarf2_per_objfile->types.buffer;
2834 if (info_ptr == NULL)
2836 dwarf2_per_objfile->signatured_types = NULL;
2840 types_htab = allocate_signatured_type_table (objfile);
2842 if (dwarf2_die_debug)
2843 fprintf_unfiltered (gdb_stdlog, "Signatured types:\n");
2845 while (info_ptr < dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
2847 unsigned int offset;
2848 unsigned int offset_size;
2849 unsigned int type_offset;
2850 unsigned int length, initial_length_size;
2851 unsigned short version;
2853 struct signatured_type *type_sig;
2855 gdb_byte *ptr = info_ptr;
2857 offset = ptr - dwarf2_per_objfile->types.buffer;
2859 /* We need to read the type's signature in order to build the hash
2860 table, but we don't need to read anything else just yet. */
2862 /* Sanity check to ensure entire cu is present. */
2863 length = read_initial_length (objfile->obfd, ptr, &initial_length_size);
2864 if (ptr + length + initial_length_size
2865 > dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
2867 complaint (&symfile_complaints,
2868 _("debug type entry runs off end of `.debug_types' section, ignored"));
2872 offset_size = initial_length_size == 4 ? 4 : 8;
2873 ptr += initial_length_size;
2874 version = bfd_get_16 (objfile->obfd, ptr);
2876 ptr += offset_size; /* abbrev offset */
2877 ptr += 1; /* address size */
2878 signature = bfd_get_64 (objfile->obfd, ptr);
2880 type_offset = read_offset_1 (objfile->obfd, ptr, offset_size);
2882 type_sig = obstack_alloc (&objfile->objfile_obstack, sizeof (*type_sig));
2883 memset (type_sig, 0, sizeof (*type_sig));
2884 type_sig->signature = signature;
2885 type_sig->offset = offset;
2886 type_sig->type_offset = type_offset;
2887 type_sig->per_cu.objfile = objfile;
2888 type_sig->per_cu.from_debug_types = 1;
2890 slot = htab_find_slot (types_htab, type_sig, INSERT);
2891 gdb_assert (slot != NULL);
2894 if (dwarf2_die_debug)
2895 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n",
2896 offset, phex (signature, sizeof (signature)));
2898 info_ptr = info_ptr + initial_length_size + length;
2901 dwarf2_per_objfile->signatured_types = types_htab;
2903 dwarf2_per_objfile->n_type_comp_units = htab_elements (types_htab);
2904 dwarf2_per_objfile->type_comp_units
2905 = obstack_alloc (&objfile->objfile_obstack,
2906 dwarf2_per_objfile->n_type_comp_units
2907 * sizeof (struct dwarf2_per_cu_data *));
2908 iter = &dwarf2_per_objfile->type_comp_units[0];
2909 htab_traverse_noresize (types_htab, add_signatured_type_cu_to_list, &iter);
2910 gdb_assert (iter - &dwarf2_per_objfile->type_comp_units[0]
2911 == dwarf2_per_objfile->n_type_comp_units);
2916 /* Lookup a signature based type.
2917 Returns NULL if SIG is not present in the table. */
2919 static struct signatured_type *
2920 lookup_signatured_type (struct objfile *objfile, ULONGEST sig)
2922 struct signatured_type find_entry, *entry;
2924 if (dwarf2_per_objfile->signatured_types == NULL)
2926 complaint (&symfile_complaints,
2927 _("missing `.debug_types' section for DW_FORM_sig8 die"));
2931 find_entry.signature = sig;
2932 entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
2936 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
2939 init_cu_die_reader (struct die_reader_specs *reader,
2940 struct dwarf2_cu *cu)
2942 reader->abfd = cu->objfile->obfd;
2944 if (cu->per_cu->from_debug_types)
2946 gdb_assert (dwarf2_per_objfile->types.readin);
2947 reader->buffer = dwarf2_per_objfile->types.buffer;
2951 gdb_assert (dwarf2_per_objfile->info.readin);
2952 reader->buffer = dwarf2_per_objfile->info.buffer;
2956 /* Find the base address of the compilation unit for range lists and
2957 location lists. It will normally be specified by DW_AT_low_pc.
2958 In DWARF-3 draft 4, the base address could be overridden by
2959 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2960 compilation units with discontinuous ranges. */
2963 dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu)
2965 struct attribute *attr;
2968 cu->base_address = 0;
2970 attr = dwarf2_attr (die, DW_AT_entry_pc, cu);
2973 cu->base_address = DW_ADDR (attr);
2978 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
2981 cu->base_address = DW_ADDR (attr);
2987 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
2988 to combine the common parts.
2989 Process a compilation unit for a psymtab.
2990 BUFFER is a pointer to the beginning of the dwarf section buffer,
2991 either .debug_info or debug_types.
2992 INFO_PTR is a pointer to the start of the CU.
2993 Returns a pointer to the next CU. */
2996 process_psymtab_comp_unit (struct objfile *objfile,
2997 struct dwarf2_per_cu_data *this_cu,
2998 gdb_byte *buffer, gdb_byte *info_ptr,
2999 unsigned int buffer_size)
3001 bfd *abfd = objfile->obfd;
3002 gdb_byte *beg_of_comp_unit = info_ptr;
3003 struct die_info *comp_unit_die;
3004 struct partial_symtab *pst;
3006 struct cleanup *back_to_inner;
3007 struct dwarf2_cu cu;
3008 int has_children, has_pc_info;
3009 struct attribute *attr;
3010 CORE_ADDR best_lowpc = 0, best_highpc = 0;
3011 struct die_reader_specs reader_specs;
3013 memset (&cu, 0, sizeof (cu));
3014 cu.objfile = objfile;
3015 obstack_init (&cu.comp_unit_obstack);
3017 back_to_inner = make_cleanup (free_stack_comp_unit, &cu);
3019 info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
3020 buffer, buffer_size,
3023 /* Complete the cu_header. */
3024 cu.header.offset = beg_of_comp_unit - buffer;
3025 cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
3027 cu.list_in_scope = &file_symbols;
3029 /* If this compilation unit was already read in, free the
3030 cached copy in order to read it in again. This is
3031 necessary because we skipped some symbols when we first
3032 read in the compilation unit (see load_partial_dies).
3033 This problem could be avoided, but the benefit is
3035 if (this_cu->cu != NULL)
3036 free_one_cached_comp_unit (this_cu->cu);
3038 /* Note that this is a pointer to our stack frame, being
3039 added to a global data structure. It will be cleaned up
3040 in free_stack_comp_unit when we finish with this
3041 compilation unit. */
3043 cu.per_cu = this_cu;
3045 /* Read the abbrevs for this compilation unit into a table. */
3046 dwarf2_read_abbrevs (abfd, &cu);
3047 make_cleanup (dwarf2_free_abbrev_table, &cu);
3049 /* Read the compilation unit die. */
3050 if (this_cu->from_debug_types)
3051 info_ptr += 8 /*signature*/ + cu.header.offset_size;
3052 init_cu_die_reader (&reader_specs, &cu);
3053 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
3056 if (this_cu->from_debug_types)
3058 /* offset,length haven't been set yet for type units. */
3059 this_cu->offset = cu.header.offset;
3060 this_cu->length = cu.header.length + cu.header.initial_length_size;
3062 else if (comp_unit_die->tag == DW_TAG_partial_unit)
3064 info_ptr = (beg_of_comp_unit + cu.header.length
3065 + cu.header.initial_length_size);
3066 do_cleanups (back_to_inner);
3070 /* Set the language we're debugging. */
3071 attr = dwarf2_attr (comp_unit_die, DW_AT_language, &cu);
3073 set_cu_language (DW_UNSND (attr), &cu);
3075 set_cu_language (language_minimal, &cu);
3077 /* Allocate a new partial symbol table structure. */
3078 attr = dwarf2_attr (comp_unit_die, DW_AT_name, &cu);
3079 pst = start_psymtab_common (objfile, objfile->section_offsets,
3080 (attr != NULL) ? DW_STRING (attr) : "",
3081 /* TEXTLOW and TEXTHIGH are set below. */
3083 objfile->global_psymbols.next,
3084 objfile->static_psymbols.next);
3086 attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, &cu);
3088 pst->dirname = DW_STRING (attr);
3090 pst->read_symtab_private = this_cu;
3092 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3094 /* Store the function that reads in the rest of the symbol table */
3095 pst->read_symtab = dwarf2_psymtab_to_symtab;
3097 this_cu->v.psymtab = pst;
3099 dwarf2_find_base_address (comp_unit_die, &cu);
3101 /* Possibly set the default values of LOWPC and HIGHPC from
3103 has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc,
3104 &best_highpc, &cu, pst);
3105 if (has_pc_info == 1 && best_lowpc < best_highpc)
3106 /* Store the contiguous range if it is not empty; it can be empty for
3107 CUs with no code. */
3108 addrmap_set_empty (objfile->psymtabs_addrmap,
3109 best_lowpc + baseaddr,
3110 best_highpc + baseaddr - 1, pst);
3112 /* Check if comp unit has_children.
3113 If so, read the rest of the partial symbols from this comp unit.
3114 If not, there's no more debug_info for this comp unit. */
3117 struct partial_die_info *first_die;
3118 CORE_ADDR lowpc, highpc;
3120 lowpc = ((CORE_ADDR) -1);
3121 highpc = ((CORE_ADDR) 0);
3123 first_die = load_partial_dies (abfd, buffer, info_ptr, 1, &cu);
3125 scan_partial_symbols (first_die, &lowpc, &highpc,
3126 ! has_pc_info, &cu);
3128 /* If we didn't find a lowpc, set it to highpc to avoid
3129 complaints from `maint check'. */
3130 if (lowpc == ((CORE_ADDR) -1))
3133 /* If the compilation unit didn't have an explicit address range,
3134 then use the information extracted from its child dies. */
3138 best_highpc = highpc;
3141 pst->textlow = best_lowpc + baseaddr;
3142 pst->texthigh = best_highpc + baseaddr;
3144 pst->n_global_syms = objfile->global_psymbols.next -
3145 (objfile->global_psymbols.list + pst->globals_offset);
3146 pst->n_static_syms = objfile->static_psymbols.next -
3147 (objfile->static_psymbols.list + pst->statics_offset);
3148 sort_pst_symbols (pst);
3150 info_ptr = (beg_of_comp_unit + cu.header.length
3151 + cu.header.initial_length_size);
3153 if (this_cu->from_debug_types)
3155 /* It's not clear we want to do anything with stmt lists here.
3156 Waiting to see what gcc ultimately does. */
3160 /* Get the list of files included in the current compilation unit,
3161 and build a psymtab for each of them. */
3162 dwarf2_build_include_psymtabs (&cu, comp_unit_die, pst);
3165 do_cleanups (back_to_inner);
3170 /* Traversal function for htab_traverse_noresize.
3171 Process one .debug_types comp-unit. */
3174 process_type_comp_unit (void **slot, void *info)
3176 struct signatured_type *entry = (struct signatured_type *) *slot;
3177 struct objfile *objfile = (struct objfile *) info;
3178 struct dwarf2_per_cu_data *this_cu;
3180 this_cu = &entry->per_cu;
3182 gdb_assert (dwarf2_per_objfile->types.readin);
3183 process_psymtab_comp_unit (objfile, this_cu,
3184 dwarf2_per_objfile->types.buffer,
3185 dwarf2_per_objfile->types.buffer + entry->offset,
3186 dwarf2_per_objfile->types.size);
3191 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
3192 Build partial symbol tables for the .debug_types comp-units. */
3195 build_type_psymtabs (struct objfile *objfile)
3197 if (! create_debug_types_hash_table (objfile))
3200 htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
3201 process_type_comp_unit, objfile);
3204 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
3207 psymtabs_addrmap_cleanup (void *o)
3209 struct objfile *objfile = o;
3211 objfile->psymtabs_addrmap = NULL;
3214 /* Build the partial symbol table by doing a quick pass through the
3215 .debug_info and .debug_abbrev sections. */
3218 dwarf2_build_psymtabs_hard (struct objfile *objfile)
3221 struct cleanup *back_to, *addrmap_cleanup;
3222 struct obstack temp_obstack;
3224 dwarf2_per_objfile->reading_partial_symbols = 1;
3226 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
3227 info_ptr = dwarf2_per_objfile->info.buffer;
3229 /* Any cached compilation units will be linked by the per-objfile
3230 read_in_chain. Make sure to free them when we're done. */
3231 back_to = make_cleanup (free_cached_comp_units, NULL);
3233 build_type_psymtabs (objfile);
3235 create_all_comp_units (objfile);
3237 /* Create a temporary address map on a temporary obstack. We later
3238 copy this to the final obstack. */
3239 obstack_init (&temp_obstack);
3240 make_cleanup_obstack_free (&temp_obstack);
3241 objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack);
3242 addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile);
3244 /* Since the objects we're extracting from .debug_info vary in
3245 length, only the individual functions to extract them (like
3246 read_comp_unit_head and load_partial_die) can really know whether
3247 the buffer is large enough to hold another complete object.
3249 At the moment, they don't actually check that. If .debug_info
3250 holds just one extra byte after the last compilation unit's dies,
3251 then read_comp_unit_head will happily read off the end of the
3252 buffer. read_partial_die is similarly casual. Those functions
3255 For this loop condition, simply checking whether there's any data
3256 left at all should be sufficient. */
3258 while (info_ptr < (dwarf2_per_objfile->info.buffer
3259 + dwarf2_per_objfile->info.size))
3261 struct dwarf2_per_cu_data *this_cu;
3263 this_cu = dwarf2_find_comp_unit (info_ptr - dwarf2_per_objfile->info.buffer,
3266 info_ptr = process_psymtab_comp_unit (objfile, this_cu,
3267 dwarf2_per_objfile->info.buffer,
3269 dwarf2_per_objfile->info.size);
3272 objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
3273 &objfile->objfile_obstack);
3274 discard_cleanups (addrmap_cleanup);
3276 do_cleanups (back_to);
3279 /* Load the partial DIEs for a secondary CU into memory. */
3282 load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu,
3283 struct objfile *objfile)
3285 bfd *abfd = objfile->obfd;
3286 gdb_byte *info_ptr, *beg_of_comp_unit;
3287 struct die_info *comp_unit_die;
3288 struct dwarf2_cu *cu;
3289 struct cleanup *free_abbrevs_cleanup, *free_cu_cleanup = NULL;
3290 struct attribute *attr;
3292 struct die_reader_specs reader_specs;
3295 gdb_assert (! this_cu->from_debug_types);
3297 gdb_assert (dwarf2_per_objfile->info.readin);
3298 info_ptr = dwarf2_per_objfile->info.buffer + this_cu->offset;
3299 beg_of_comp_unit = info_ptr;
3301 if (this_cu->cu == NULL)
3303 cu = alloc_one_comp_unit (objfile);
3307 /* If an error occurs while loading, release our storage. */
3308 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
3310 info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr,
3311 dwarf2_per_objfile->info.buffer,
3312 dwarf2_per_objfile->info.size,
3315 /* Complete the cu_header. */
3316 cu->header.offset = this_cu->offset;
3317 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
3319 /* Link this compilation unit into the compilation unit tree. */
3321 cu->per_cu = this_cu;
3323 /* Link this CU into read_in_chain. */
3324 this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
3325 dwarf2_per_objfile->read_in_chain = this_cu;
3330 info_ptr += cu->header.first_die_offset;
3333 /* Read the abbrevs for this compilation unit into a table. */
3334 gdb_assert (cu->dwarf2_abbrevs == NULL);
3335 dwarf2_read_abbrevs (abfd, cu);
3336 free_abbrevs_cleanup = make_cleanup (dwarf2_free_abbrev_table, cu);
3338 /* Read the compilation unit die. */
3339 init_cu_die_reader (&reader_specs, cu);
3340 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
3343 /* Set the language we're debugging. */
3344 attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu);
3346 set_cu_language (DW_UNSND (attr), cu);
3348 set_cu_language (language_minimal, cu);
3350 /* Check if comp unit has_children.
3351 If so, read the rest of the partial symbols from this comp unit.
3352 If not, there's no more debug_info for this comp unit. */
3354 load_partial_dies (abfd, dwarf2_per_objfile->info.buffer, info_ptr, 0, cu);
3356 do_cleanups (free_abbrevs_cleanup);
3360 /* We've successfully allocated this compilation unit. Let our
3361 caller clean it up when finished with it. */
3362 discard_cleanups (free_cu_cleanup);
3366 /* Create a list of all compilation units in OBJFILE. We do this only
3367 if an inter-comp-unit reference is found; presumably if there is one,
3368 there will be many, and one will occur early in the .debug_info section.
3369 So there's no point in building this list incrementally. */
3372 create_all_comp_units (struct objfile *objfile)
3376 struct dwarf2_per_cu_data **all_comp_units;
3379 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
3380 info_ptr = dwarf2_per_objfile->info.buffer;
3384 all_comp_units = xmalloc (n_allocated
3385 * sizeof (struct dwarf2_per_cu_data *));
3387 while (info_ptr < dwarf2_per_objfile->info.buffer + dwarf2_per_objfile->info.size)
3389 unsigned int length, initial_length_size;
3390 struct dwarf2_per_cu_data *this_cu;
3391 unsigned int offset;
3393 offset = info_ptr - dwarf2_per_objfile->info.buffer;
3395 /* Read just enough information to find out where the next
3396 compilation unit is. */
3397 length = read_initial_length (objfile->obfd, info_ptr,
3398 &initial_length_size);
3400 /* Save the compilation unit for later lookup. */
3401 this_cu = obstack_alloc (&objfile->objfile_obstack,
3402 sizeof (struct dwarf2_per_cu_data));
3403 memset (this_cu, 0, sizeof (*this_cu));
3404 this_cu->offset = offset;
3405 this_cu->length = length + initial_length_size;
3406 this_cu->objfile = objfile;
3408 if (n_comp_units == n_allocated)
3411 all_comp_units = xrealloc (all_comp_units,
3413 * sizeof (struct dwarf2_per_cu_data *));
3415 all_comp_units[n_comp_units++] = this_cu;
3417 info_ptr = info_ptr + this_cu->length;
3420 dwarf2_per_objfile->all_comp_units
3421 = obstack_alloc (&objfile->objfile_obstack,
3422 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
3423 memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
3424 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
3425 xfree (all_comp_units);
3426 dwarf2_per_objfile->n_comp_units = n_comp_units;
3429 /* Process all loaded DIEs for compilation unit CU, starting at
3430 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
3431 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
3432 DW_AT_ranges). If NEED_PC is set, then this function will set
3433 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
3434 and record the covered ranges in the addrmap. */
3437 scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
3438 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
3440 struct partial_die_info *pdi;
3442 /* Now, march along the PDI's, descending into ones which have
3443 interesting children but skipping the children of the other ones,
3444 until we reach the end of the compilation unit. */
3450 fixup_partial_die (pdi, cu);
3452 /* Anonymous namespaces or modules have no name but have interesting
3453 children, so we need to look at them. Ditto for anonymous
3456 if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
3457 || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type)
3461 case DW_TAG_subprogram:
3462 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
3464 case DW_TAG_variable:
3465 case DW_TAG_typedef:
3466 case DW_TAG_union_type:
3467 if (!pdi->is_declaration)
3469 add_partial_symbol (pdi, cu);
3472 case DW_TAG_class_type:
3473 case DW_TAG_interface_type:
3474 case DW_TAG_structure_type:
3475 if (!pdi->is_declaration)
3477 add_partial_symbol (pdi, cu);
3480 case DW_TAG_enumeration_type:
3481 if (!pdi->is_declaration)
3482 add_partial_enumeration (pdi, cu);
3484 case DW_TAG_base_type:
3485 case DW_TAG_subrange_type:
3486 /* File scope base type definitions are added to the partial
3488 add_partial_symbol (pdi, cu);
3490 case DW_TAG_namespace:
3491 add_partial_namespace (pdi, lowpc, highpc, need_pc, cu);
3494 add_partial_module (pdi, lowpc, highpc, need_pc, cu);
3501 /* If the die has a sibling, skip to the sibling. */
3503 pdi = pdi->die_sibling;
3507 /* Functions used to compute the fully scoped name of a partial DIE.
3509 Normally, this is simple. For C++, the parent DIE's fully scoped
3510 name is concatenated with "::" and the partial DIE's name. For
3511 Java, the same thing occurs except that "." is used instead of "::".
3512 Enumerators are an exception; they use the scope of their parent
3513 enumeration type, i.e. the name of the enumeration type is not
3514 prepended to the enumerator.
3516 There are two complexities. One is DW_AT_specification; in this
3517 case "parent" means the parent of the target of the specification,
3518 instead of the direct parent of the DIE. The other is compilers
3519 which do not emit DW_TAG_namespace; in this case we try to guess
3520 the fully qualified name of structure types from their members'
3521 linkage names. This must be done using the DIE's children rather
3522 than the children of any DW_AT_specification target. We only need
3523 to do this for structures at the top level, i.e. if the target of
3524 any DW_AT_specification (if any; otherwise the DIE itself) does not
3527 /* Compute the scope prefix associated with PDI's parent, in
3528 compilation unit CU. The result will be allocated on CU's
3529 comp_unit_obstack, or a copy of the already allocated PDI->NAME
3530 field. NULL is returned if no prefix is necessary. */
3532 partial_die_parent_scope (struct partial_die_info *pdi,
3533 struct dwarf2_cu *cu)
3535 char *grandparent_scope;
3536 struct partial_die_info *parent, *real_pdi;
3538 /* We need to look at our parent DIE; if we have a DW_AT_specification,
3539 then this means the parent of the specification DIE. */
3542 while (real_pdi->has_specification)
3543 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
3545 parent = real_pdi->die_parent;
3549 if (parent->scope_set)
3550 return parent->scope;
3552 fixup_partial_die (parent, cu);
3554 grandparent_scope = partial_die_parent_scope (parent, cu);
3556 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
3557 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
3558 Work around this problem here. */
3559 if (cu->language == language_cplus
3560 && parent->tag == DW_TAG_namespace
3561 && strcmp (parent->name, "::") == 0
3562 && grandparent_scope == NULL)
3564 parent->scope = NULL;
3565 parent->scope_set = 1;
3569 if (parent->tag == DW_TAG_namespace
3570 || parent->tag == DW_TAG_module
3571 || parent->tag == DW_TAG_structure_type
3572 || parent->tag == DW_TAG_class_type
3573 || parent->tag == DW_TAG_interface_type
3574 || parent->tag == DW_TAG_union_type
3575 || parent->tag == DW_TAG_enumeration_type)
3577 if (grandparent_scope == NULL)
3578 parent->scope = parent->name;
3580 parent->scope = typename_concat (&cu->comp_unit_obstack, grandparent_scope,
3581 parent->name, 0, cu);
3583 else if (parent->tag == DW_TAG_enumerator)
3584 /* Enumerators should not get the name of the enumeration as a prefix. */
3585 parent->scope = grandparent_scope;
3588 /* FIXME drow/2004-04-01: What should we be doing with
3589 function-local names? For partial symbols, we should probably be
3591 complaint (&symfile_complaints,
3592 _("unhandled containing DIE tag %d for DIE at %d"),
3593 parent->tag, pdi->offset);
3594 parent->scope = grandparent_scope;
3597 parent->scope_set = 1;
3598 return parent->scope;
3601 /* Return the fully scoped name associated with PDI, from compilation unit
3602 CU. The result will be allocated with malloc. */
3604 partial_die_full_name (struct partial_die_info *pdi,
3605 struct dwarf2_cu *cu)
3609 /* If this is a template instantiation, we can not work out the
3610 template arguments from partial DIEs. So, unfortunately, we have
3611 to go through the full DIEs. At least any work we do building
3612 types here will be reused if full symbols are loaded later. */
3613 if (pdi->has_template_arguments)
3615 fixup_partial_die (pdi, cu);
3617 if (pdi->name != NULL && strchr (pdi->name, '<') == NULL)
3619 struct die_info *die;
3620 struct attribute attr;
3621 struct dwarf2_cu *ref_cu = cu;
3624 attr.form = DW_FORM_ref_addr;
3625 attr.u.addr = pdi->offset;
3626 die = follow_die_ref (NULL, &attr, &ref_cu);
3628 return xstrdup (dwarf2_full_name (NULL, die, ref_cu));
3632 parent_scope = partial_die_parent_scope (pdi, cu);
3633 if (parent_scope == NULL)
3636 return typename_concat (NULL, parent_scope, pdi->name, 0, cu);
3640 add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
3642 struct objfile *objfile = cu->objfile;
3644 char *actual_name = NULL;
3645 const struct partial_symbol *psym = NULL;
3647 int built_actual_name = 0;
3649 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3651 actual_name = partial_die_full_name (pdi, cu);
3653 built_actual_name = 1;
3655 if (actual_name == NULL)
3656 actual_name = pdi->name;
3660 case DW_TAG_subprogram:
3661 if (pdi->is_external || cu->language == language_ada)
3663 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
3664 of the global scope. But in Ada, we want to be able to access
3665 nested procedures globally. So all Ada subprograms are stored
3666 in the global scope. */
3667 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3668 mst_text, objfile); */
3669 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
3671 VAR_DOMAIN, LOC_BLOCK,
3672 &objfile->global_psymbols,
3673 0, pdi->lowpc + baseaddr,
3674 cu->language, objfile);
3678 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3679 mst_file_text, objfile); */
3680 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
3682 VAR_DOMAIN, LOC_BLOCK,
3683 &objfile->static_psymbols,
3684 0, pdi->lowpc + baseaddr,
3685 cu->language, objfile);
3688 case DW_TAG_variable:
3690 addr = decode_locdesc (pdi->locdesc, cu);
3694 && !dwarf2_per_objfile->has_section_at_zero)
3696 /* A global or static variable may also have been stripped
3697 out by the linker if unused, in which case its address
3698 will be nullified; do not add such variables into partial
3699 symbol table then. */
3701 else if (pdi->is_external)
3704 Don't enter into the minimal symbol tables as there is
3705 a minimal symbol table entry from the ELF symbols already.
3706 Enter into partial symbol table if it has a location
3707 descriptor or a type.
3708 If the location descriptor is missing, new_symbol will create
3709 a LOC_UNRESOLVED symbol, the address of the variable will then
3710 be determined from the minimal symbol table whenever the variable
3712 The address for the partial symbol table entry is not
3713 used by GDB, but it comes in handy for debugging partial symbol
3716 if (pdi->locdesc || pdi->has_type)
3717 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
3719 VAR_DOMAIN, LOC_STATIC,
3720 &objfile->global_psymbols,
3722 cu->language, objfile);
3726 /* Static Variable. Skip symbols without location descriptors. */
3727 if (pdi->locdesc == NULL)
3729 if (built_actual_name)
3730 xfree (actual_name);
3733 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
3734 mst_file_data, objfile); */
3735 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
3737 VAR_DOMAIN, LOC_STATIC,
3738 &objfile->static_psymbols,
3740 cu->language, objfile);
3743 case DW_TAG_typedef:
3744 case DW_TAG_base_type:
3745 case DW_TAG_subrange_type:
3746 add_psymbol_to_list (actual_name, strlen (actual_name),
3748 VAR_DOMAIN, LOC_TYPEDEF,
3749 &objfile->static_psymbols,
3750 0, (CORE_ADDR) 0, cu->language, objfile);
3752 case DW_TAG_namespace:
3753 add_psymbol_to_list (actual_name, strlen (actual_name),
3755 VAR_DOMAIN, LOC_TYPEDEF,
3756 &objfile->global_psymbols,
3757 0, (CORE_ADDR) 0, cu->language, objfile);
3759 case DW_TAG_class_type:
3760 case DW_TAG_interface_type:
3761 case DW_TAG_structure_type:
3762 case DW_TAG_union_type:
3763 case DW_TAG_enumeration_type:
3764 /* Skip external references. The DWARF standard says in the section
3765 about "Structure, Union, and Class Type Entries": "An incomplete
3766 structure, union or class type is represented by a structure,
3767 union or class entry that does not have a byte size attribute
3768 and that has a DW_AT_declaration attribute." */
3769 if (!pdi->has_byte_size && pdi->is_declaration)
3771 if (built_actual_name)
3772 xfree (actual_name);
3776 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
3777 static vs. global. */
3778 add_psymbol_to_list (actual_name, strlen (actual_name),
3780 STRUCT_DOMAIN, LOC_TYPEDEF,
3781 (cu->language == language_cplus
3782 || cu->language == language_java)
3783 ? &objfile->global_psymbols
3784 : &objfile->static_psymbols,
3785 0, (CORE_ADDR) 0, cu->language, objfile);
3788 case DW_TAG_enumerator:
3789 add_psymbol_to_list (actual_name, strlen (actual_name),
3791 VAR_DOMAIN, LOC_CONST,
3792 (cu->language == language_cplus
3793 || cu->language == language_java)
3794 ? &objfile->global_psymbols
3795 : &objfile->static_psymbols,
3796 0, (CORE_ADDR) 0, cu->language, objfile);
3802 if (built_actual_name)
3803 xfree (actual_name);
3806 /* Read a partial die corresponding to a namespace; also, add a symbol
3807 corresponding to that namespace to the symbol table. NAMESPACE is
3808 the name of the enclosing namespace. */
3811 add_partial_namespace (struct partial_die_info *pdi,
3812 CORE_ADDR *lowpc, CORE_ADDR *highpc,
3813 int need_pc, struct dwarf2_cu *cu)
3815 /* Add a symbol for the namespace. */
3817 add_partial_symbol (pdi, cu);
3819 /* Now scan partial symbols in that namespace. */
3821 if (pdi->has_children)
3822 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
3825 /* Read a partial die corresponding to a Fortran module. */
3828 add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
3829 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
3831 /* Now scan partial symbols in that module. */
3833 if (pdi->has_children)
3834 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
3837 /* Read a partial die corresponding to a subprogram and create a partial
3838 symbol for that subprogram. When the CU language allows it, this
3839 routine also defines a partial symbol for each nested subprogram
3840 that this subprogram contains.
3842 DIE my also be a lexical block, in which case we simply search
3843 recursively for suprograms defined inside that lexical block.
3844 Again, this is only performed when the CU language allows this
3845 type of definitions. */
3848 add_partial_subprogram (struct partial_die_info *pdi,
3849 CORE_ADDR *lowpc, CORE_ADDR *highpc,
3850 int need_pc, struct dwarf2_cu *cu)
3852 if (pdi->tag == DW_TAG_subprogram)
3854 if (pdi->has_pc_info)
3856 if (pdi->lowpc < *lowpc)
3857 *lowpc = pdi->lowpc;
3858 if (pdi->highpc > *highpc)
3859 *highpc = pdi->highpc;
3863 struct objfile *objfile = cu->objfile;
3865 baseaddr = ANOFFSET (objfile->section_offsets,
3866 SECT_OFF_TEXT (objfile));
3867 addrmap_set_empty (objfile->psymtabs_addrmap,
3868 pdi->lowpc + baseaddr,
3869 pdi->highpc - 1 + baseaddr,
3870 cu->per_cu->v.psymtab);
3872 if (!pdi->is_declaration)
3873 /* Ignore subprogram DIEs that do not have a name, they are
3874 illegal. Do not emit a complaint at this point, we will
3875 do so when we convert this psymtab into a symtab. */
3877 add_partial_symbol (pdi, cu);
3881 if (! pdi->has_children)
3884 if (cu->language == language_ada)
3886 pdi = pdi->die_child;
3889 fixup_partial_die (pdi, cu);
3890 if (pdi->tag == DW_TAG_subprogram
3891 || pdi->tag == DW_TAG_lexical_block)
3892 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
3893 pdi = pdi->die_sibling;
3898 /* See if we can figure out if the class lives in a namespace. We do
3899 this by looking for a member function; its demangled name will
3900 contain namespace info, if there is any. */
3903 guess_structure_name (struct partial_die_info *struct_pdi,
3904 struct dwarf2_cu *cu)
3906 if ((cu->language == language_cplus
3907 || cu->language == language_java)
3908 && cu->has_namespace_info == 0
3909 && struct_pdi->has_children)
3911 /* NOTE: carlton/2003-10-07: Getting the info this way changes
3912 what template types look like, because the demangler
3913 frequently doesn't give the same name as the debug info. We
3914 could fix this by only using the demangled name to get the
3915 prefix (but see comment in read_structure_type). */
3917 struct partial_die_info *real_pdi;
3919 /* If this DIE (this DIE's specification, if any) has a parent, then
3920 we should not do this. We'll prepend the parent's fully qualified
3921 name when we create the partial symbol. */
3923 real_pdi = struct_pdi;
3924 while (real_pdi->has_specification)
3925 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
3927 if (real_pdi->die_parent != NULL)
3932 /* Read a partial die corresponding to an enumeration type. */
3935 add_partial_enumeration (struct partial_die_info *enum_pdi,
3936 struct dwarf2_cu *cu)
3938 struct partial_die_info *pdi;
3940 if (enum_pdi->name != NULL)
3941 add_partial_symbol (enum_pdi, cu);
3943 pdi = enum_pdi->die_child;
3946 if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
3947 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
3949 add_partial_symbol (pdi, cu);
3950 pdi = pdi->die_sibling;
3954 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
3955 Return the corresponding abbrev, or NULL if the number is zero (indicating
3956 an empty DIE). In either case *BYTES_READ will be set to the length of
3957 the initial number. */
3959 static struct abbrev_info *
3960 peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
3961 struct dwarf2_cu *cu)
3963 bfd *abfd = cu->objfile->obfd;
3964 unsigned int abbrev_number;
3965 struct abbrev_info *abbrev;
3967 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
3969 if (abbrev_number == 0)
3972 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
3975 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number,
3976 bfd_get_filename (abfd));
3982 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
3983 Returns a pointer to the end of a series of DIEs, terminated by an empty
3984 DIE. Any children of the skipped DIEs will also be skipped. */
3987 skip_children (gdb_byte *buffer, gdb_byte *info_ptr, struct dwarf2_cu *cu)
3989 struct abbrev_info *abbrev;
3990 unsigned int bytes_read;
3994 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
3996 return info_ptr + bytes_read;
3998 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
4002 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4003 INFO_PTR should point just after the initial uleb128 of a DIE, and the
4004 abbrev corresponding to that skipped uleb128 should be passed in
4005 ABBREV. Returns a pointer to this DIE's sibling, skipping any
4009 skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
4010 struct abbrev_info *abbrev, struct dwarf2_cu *cu)
4012 unsigned int bytes_read;
4013 struct attribute attr;
4014 bfd *abfd = cu->objfile->obfd;
4015 unsigned int form, i;
4017 for (i = 0; i < abbrev->num_attrs; i++)
4019 /* The only abbrev we care about is DW_AT_sibling. */
4020 if (abbrev->attrs[i].name == DW_AT_sibling)
4022 read_attribute (&attr, &abbrev->attrs[i],
4023 abfd, info_ptr, cu);
4024 if (attr.form == DW_FORM_ref_addr)
4025 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
4027 return buffer + dwarf2_get_ref_die_offset (&attr);
4030 /* If it isn't DW_AT_sibling, skip this attribute. */
4031 form = abbrev->attrs[i].form;
4035 case DW_FORM_ref_addr:
4036 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
4037 and later it is offset sized. */
4038 if (cu->header.version == 2)
4039 info_ptr += cu->header.addr_size;
4041 info_ptr += cu->header.offset_size;
4044 info_ptr += cu->header.addr_size;
4051 case DW_FORM_flag_present:
4066 case DW_FORM_string:
4067 read_direct_string (abfd, info_ptr, &bytes_read);
4068 info_ptr += bytes_read;
4070 case DW_FORM_sec_offset:
4072 info_ptr += cu->header.offset_size;
4074 case DW_FORM_exprloc:
4076 info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
4077 info_ptr += bytes_read;
4079 case DW_FORM_block1:
4080 info_ptr += 1 + read_1_byte (abfd, info_ptr);
4082 case DW_FORM_block2:
4083 info_ptr += 2 + read_2_bytes (abfd, info_ptr);
4085 case DW_FORM_block4:
4086 info_ptr += 4 + read_4_bytes (abfd, info_ptr);
4090 case DW_FORM_ref_udata:
4091 info_ptr = skip_leb128 (abfd, info_ptr);
4093 case DW_FORM_indirect:
4094 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
4095 info_ptr += bytes_read;
4096 /* We need to continue parsing from here, so just go back to
4098 goto skip_attribute;
4101 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
4102 dwarf_form_name (form),
4103 bfd_get_filename (abfd));
4107 if (abbrev->has_children)
4108 return skip_children (buffer, info_ptr, cu);
4113 /* Locate ORIG_PDI's sibling.
4114 INFO_PTR should point to the start of the next DIE after ORIG_PDI
4118 locate_pdi_sibling (struct partial_die_info *orig_pdi,
4119 gdb_byte *buffer, gdb_byte *info_ptr,
4120 bfd *abfd, struct dwarf2_cu *cu)
4122 /* Do we know the sibling already? */
4124 if (orig_pdi->sibling)
4125 return orig_pdi->sibling;
4127 /* Are there any children to deal with? */
4129 if (!orig_pdi->has_children)
4132 /* Skip the children the long way. */
4134 return skip_children (buffer, info_ptr, cu);
4137 /* Expand this partial symbol table into a full symbol table. */
4140 dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
4146 warning (_("bug: psymtab for %s is already read in."), pst->filename);
4152 printf_filtered (_("Reading in symbols for %s..."), pst->filename);
4153 gdb_flush (gdb_stdout);
4156 /* Restore our global data. */
4157 dwarf2_per_objfile = objfile_data (pst->objfile,
4158 dwarf2_objfile_data_key);
4160 /* If this psymtab is constructed from a debug-only objfile, the
4161 has_section_at_zero flag will not necessarily be correct. We
4162 can get the correct value for this flag by looking at the data
4163 associated with the (presumably stripped) associated objfile. */
4164 if (pst->objfile->separate_debug_objfile_backlink)
4166 struct dwarf2_per_objfile *dpo_backlink
4167 = objfile_data (pst->objfile->separate_debug_objfile_backlink,
4168 dwarf2_objfile_data_key);
4170 dwarf2_per_objfile->has_section_at_zero
4171 = dpo_backlink->has_section_at_zero;
4174 dwarf2_per_objfile->reading_partial_symbols = 0;
4176 psymtab_to_symtab_1 (pst);
4178 /* Finish up the debug error message. */
4180 printf_filtered (_("done.\n"));
4185 /* Add PER_CU to the queue. */
4188 queue_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
4190 struct dwarf2_queue_item *item;
4193 item = xmalloc (sizeof (*item));
4194 item->per_cu = per_cu;
4197 if (dwarf2_queue == NULL)
4198 dwarf2_queue = item;
4200 dwarf2_queue_tail->next = item;
4202 dwarf2_queue_tail = item;
4205 /* Process the queue. */
4208 process_queue (struct objfile *objfile)
4210 struct dwarf2_queue_item *item, *next_item;
4212 /* The queue starts out with one item, but following a DIE reference
4213 may load a new CU, adding it to the end of the queue. */
4214 for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
4216 if (dwarf2_per_objfile->using_index
4217 ? !item->per_cu->v.quick->symtab
4218 : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin))
4219 process_full_comp_unit (item->per_cu);
4221 item->per_cu->queued = 0;
4222 next_item = item->next;
4226 dwarf2_queue_tail = NULL;
4229 /* Free all allocated queue entries. This function only releases anything if
4230 an error was thrown; if the queue was processed then it would have been
4231 freed as we went along. */
4234 dwarf2_release_queue (void *dummy)
4236 struct dwarf2_queue_item *item, *last;
4238 item = dwarf2_queue;
4241 /* Anything still marked queued is likely to be in an
4242 inconsistent state, so discard it. */
4243 if (item->per_cu->queued)
4245 if (item->per_cu->cu != NULL)
4246 free_one_cached_comp_unit (item->per_cu->cu);
4247 item->per_cu->queued = 0;
4255 dwarf2_queue = dwarf2_queue_tail = NULL;
4258 /* Read in full symbols for PST, and anything it depends on. */
4261 psymtab_to_symtab_1 (struct partial_symtab *pst)
4263 struct dwarf2_per_cu_data *per_cu;
4264 struct cleanup *back_to;
4267 for (i = 0; i < pst->number_of_dependencies; i++)
4268 if (!pst->dependencies[i]->readin)
4270 /* Inform about additional files that need to be read in. */
4273 /* FIXME: i18n: Need to make this a single string. */
4274 fputs_filtered (" ", gdb_stdout);
4276 fputs_filtered ("and ", gdb_stdout);
4278 printf_filtered ("%s...", pst->dependencies[i]->filename);
4279 wrap_here (""); /* Flush output */
4280 gdb_flush (gdb_stdout);
4282 psymtab_to_symtab_1 (pst->dependencies[i]);
4285 per_cu = pst->read_symtab_private;
4289 /* It's an include file, no symbols to read for it.
4290 Everything is in the parent symtab. */
4295 dw2_do_instantiate_symtab (pst->objfile, per_cu);
4298 /* Load the DIEs associated with PER_CU into memory. */
4301 load_full_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
4303 bfd *abfd = objfile->obfd;
4304 struct dwarf2_cu *cu;
4305 unsigned int offset;
4306 gdb_byte *info_ptr, *beg_of_comp_unit;
4307 struct cleanup *free_abbrevs_cleanup = NULL, *free_cu_cleanup = NULL;
4308 struct attribute *attr;
4311 gdb_assert (! per_cu->from_debug_types);
4313 /* Set local variables from the partial symbol table info. */
4314 offset = per_cu->offset;
4316 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
4317 info_ptr = dwarf2_per_objfile->info.buffer + offset;
4318 beg_of_comp_unit = info_ptr;
4320 if (per_cu->cu == NULL)
4322 cu = alloc_one_comp_unit (objfile);
4326 /* If an error occurs while loading, release our storage. */
4327 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
4329 /* Read in the comp_unit header. */
4330 info_ptr = read_comp_unit_head (&cu->header, info_ptr, abfd);
4332 /* Complete the cu_header. */
4333 cu->header.offset = offset;
4334 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
4336 /* Read the abbrevs for this compilation unit. */
4337 dwarf2_read_abbrevs (abfd, cu);
4338 free_abbrevs_cleanup = make_cleanup (dwarf2_free_abbrev_table, cu);
4340 /* Link this compilation unit into the compilation unit tree. */
4342 cu->per_cu = per_cu;
4344 /* Link this CU into read_in_chain. */
4345 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
4346 dwarf2_per_objfile->read_in_chain = per_cu;
4351 info_ptr += cu->header.first_die_offset;
4354 cu->dies = read_comp_unit (info_ptr, cu);
4356 /* We try not to read any attributes in this function, because not
4357 all objfiles needed for references have been loaded yet, and symbol
4358 table processing isn't initialized. But we have to set the CU language,
4359 or we won't be able to build types correctly. */
4360 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
4362 set_cu_language (DW_UNSND (attr), cu);
4364 set_cu_language (language_minimal, cu);
4366 /* Similarly, if we do not read the producer, we can not apply
4367 producer-specific interpretation. */
4368 attr = dwarf2_attr (cu->dies, DW_AT_producer, cu);
4370 cu->producer = DW_STRING (attr);
4374 do_cleanups (free_abbrevs_cleanup);
4376 /* We've successfully allocated this compilation unit. Let our
4377 caller clean it up when finished with it. */
4378 discard_cleanups (free_cu_cleanup);
4382 /* Add a DIE to the delayed physname list. */
4385 add_to_method_list (struct type *type, int fnfield_index, int index,
4386 const char *name, struct die_info *die,
4387 struct dwarf2_cu *cu)
4389 struct delayed_method_info mi;
4391 mi.fnfield_index = fnfield_index;
4395 VEC_safe_push (delayed_method_info, cu->method_list, &mi);
4398 /* A cleanup for freeing the delayed method list. */
4401 free_delayed_list (void *ptr)
4403 struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr;
4404 if (cu->method_list != NULL)
4406 VEC_free (delayed_method_info, cu->method_list);
4407 cu->method_list = NULL;
4411 /* Compute the physnames of any methods on the CU's method list.
4413 The computation of method physnames is delayed in order to avoid the
4414 (bad) condition that one of the method's formal parameters is of an as yet
4418 compute_delayed_physnames (struct dwarf2_cu *cu)
4421 struct delayed_method_info *mi;
4422 for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i)
4425 struct fn_fieldlist *fn_flp
4426 = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index);
4427 physname = (char *) dwarf2_physname ((char *) mi->name, mi->die, cu);
4428 fn_flp->fn_fields[mi->index].physname = physname ? physname : "";
4432 /* Generate full symbol information for PST and CU, whose DIEs have
4433 already been loaded into memory. */
4436 process_full_comp_unit (struct dwarf2_per_cu_data *per_cu)
4438 struct dwarf2_cu *cu = per_cu->cu;
4439 struct objfile *objfile = per_cu->objfile;
4440 CORE_ADDR lowpc, highpc;
4441 struct symtab *symtab;
4442 struct cleanup *back_to, *delayed_list_cleanup;
4445 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
4448 back_to = make_cleanup (really_free_pendings, NULL);
4449 delayed_list_cleanup = make_cleanup (free_delayed_list, cu);
4451 cu->list_in_scope = &file_symbols;
4453 dwarf2_find_base_address (cu->dies, cu);
4455 /* Do line number decoding in read_file_scope () */
4456 process_die (cu->dies, cu);
4458 /* Now that we have processed all the DIEs in the CU, all the types
4459 should be complete, and it should now be safe to compute all of the
4461 compute_delayed_physnames (cu);
4462 do_cleanups (delayed_list_cleanup);
4464 /* Some compilers don't define a DW_AT_high_pc attribute for the
4465 compilation unit. If the DW_AT_high_pc is missing, synthesize
4466 it, by scanning the DIE's below the compilation unit. */
4467 get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
4469 symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
4471 /* Set symtab language to language from DW_AT_language.
4472 If the compilation is from a C file generated by language preprocessors,
4473 do not set the language if it was already deduced by start_subfile. */
4475 && !(cu->language == language_c && symtab->language != language_c))
4477 symtab->language = cu->language;
4480 if (dwarf2_per_objfile->using_index)
4481 per_cu->v.quick->symtab = symtab;
4484 struct partial_symtab *pst = per_cu->v.psymtab;
4485 pst->symtab = symtab;
4489 do_cleanups (back_to);
4492 /* Process a die and its children. */
4495 process_die (struct die_info *die, struct dwarf2_cu *cu)
4499 case DW_TAG_padding:
4501 case DW_TAG_compile_unit:
4502 read_file_scope (die, cu);
4504 case DW_TAG_type_unit:
4505 read_type_unit_scope (die, cu);
4507 case DW_TAG_subprogram:
4508 case DW_TAG_inlined_subroutine:
4509 read_func_scope (die, cu);
4511 case DW_TAG_lexical_block:
4512 case DW_TAG_try_block:
4513 case DW_TAG_catch_block:
4514 read_lexical_block_scope (die, cu);
4516 case DW_TAG_class_type:
4517 case DW_TAG_interface_type:
4518 case DW_TAG_structure_type:
4519 case DW_TAG_union_type:
4520 process_structure_scope (die, cu);
4522 case DW_TAG_enumeration_type:
4523 process_enumeration_scope (die, cu);
4526 /* These dies have a type, but processing them does not create
4527 a symbol or recurse to process the children. Therefore we can
4528 read them on-demand through read_type_die. */
4529 case DW_TAG_subroutine_type:
4530 case DW_TAG_set_type:
4531 case DW_TAG_array_type:
4532 case DW_TAG_pointer_type:
4533 case DW_TAG_ptr_to_member_type:
4534 case DW_TAG_reference_type:
4535 case DW_TAG_string_type:
4538 case DW_TAG_base_type:
4539 case DW_TAG_subrange_type:
4540 case DW_TAG_typedef:
4541 /* Add a typedef symbol for the type definition, if it has a
4543 new_symbol (die, read_type_die (die, cu), cu);
4545 case DW_TAG_common_block:
4546 read_common_block (die, cu);
4548 case DW_TAG_common_inclusion:
4550 case DW_TAG_namespace:
4551 processing_has_namespace_info = 1;
4552 read_namespace (die, cu);
4555 processing_has_namespace_info = 1;
4556 read_module (die, cu);
4558 case DW_TAG_imported_declaration:
4559 case DW_TAG_imported_module:
4560 processing_has_namespace_info = 1;
4561 if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
4562 || cu->language != language_fortran))
4563 complaint (&symfile_complaints, _("Tag '%s' has unexpected children"),
4564 dwarf_tag_name (die->tag));
4565 read_import_statement (die, cu);
4568 new_symbol (die, NULL, cu);
4573 /* A helper function for dwarf2_compute_name which determines whether DIE
4574 needs to have the name of the scope prepended to the name listed in the
4578 die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu)
4580 struct attribute *attr;
4584 case DW_TAG_namespace:
4585 case DW_TAG_typedef:
4586 case DW_TAG_class_type:
4587 case DW_TAG_interface_type:
4588 case DW_TAG_structure_type:
4589 case DW_TAG_union_type:
4590 case DW_TAG_enumeration_type:
4591 case DW_TAG_enumerator:
4592 case DW_TAG_subprogram:
4596 case DW_TAG_variable:
4597 /* We only need to prefix "globally" visible variables. These include
4598 any variable marked with DW_AT_external or any variable that
4599 lives in a namespace. [Variables in anonymous namespaces
4600 require prefixing, but they are not DW_AT_external.] */
4602 if (dwarf2_attr (die, DW_AT_specification, cu))
4604 struct dwarf2_cu *spec_cu = cu;
4606 return die_needs_namespace (die_specification (die, &spec_cu),
4610 attr = dwarf2_attr (die, DW_AT_external, cu);
4611 if (attr == NULL && die->parent->tag != DW_TAG_namespace
4612 && die->parent->tag != DW_TAG_module)
4614 /* A variable in a lexical block of some kind does not need a
4615 namespace, even though in C++ such variables may be external
4616 and have a mangled name. */
4617 if (die->parent->tag == DW_TAG_lexical_block
4618 || die->parent->tag == DW_TAG_try_block
4619 || die->parent->tag == DW_TAG_catch_block
4620 || die->parent->tag == DW_TAG_subprogram)
4629 /* Retrieve the last character from a mem_file. */
4632 do_ui_file_peek_last (void *object, const char *buffer, long length)
4634 char *last_char_p = (char *) object;
4637 *last_char_p = buffer[length - 1];
4640 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
4641 compute the physname for the object, which include a method's
4642 formal parameters (C++/Java) and return type (Java).
4644 For Ada, return the DIE's linkage name rather than the fully qualified
4645 name. PHYSNAME is ignored..
4647 The result is allocated on the objfile_obstack and canonicalized. */
4650 dwarf2_compute_name (char *name, struct die_info *die, struct dwarf2_cu *cu,
4654 name = dwarf2_name (die, cu);
4656 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
4657 compute it by typename_concat inside GDB. */
4658 if (cu->language == language_ada
4659 || (cu->language == language_fortran && physname))
4661 /* For Ada unit, we prefer the linkage name over the name, as
4662 the former contains the exported name, which the user expects
4663 to be able to reference. Ideally, we want the user to be able
4664 to reference this entity using either natural or linkage name,
4665 but we haven't started looking at this enhancement yet. */
4666 struct attribute *attr;
4668 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
4670 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
4671 if (attr && DW_STRING (attr))
4672 return DW_STRING (attr);
4675 /* These are the only languages we know how to qualify names in. */
4677 && (cu->language == language_cplus || cu->language == language_java
4678 || cu->language == language_fortran))
4680 if (die_needs_namespace (die, cu))
4684 struct ui_file *buf;
4686 prefix = determine_prefix (die, cu);
4687 buf = mem_fileopen ();
4688 if (*prefix != '\0')
4690 char *prefixed_name = typename_concat (NULL, prefix, name,
4693 fputs_unfiltered (prefixed_name, buf);
4694 xfree (prefixed_name);
4697 fputs_unfiltered (name ? name : "", buf);
4699 /* Template parameters may be specified in the DIE's DW_AT_name, or
4700 as children with DW_TAG_template_type_param or
4701 DW_TAG_value_type_param. If the latter, add them to the name
4702 here. If the name already has template parameters, then
4703 skip this step; some versions of GCC emit both, and
4704 it is more efficient to use the pre-computed name.
4706 Something to keep in mind about this process: it is very
4707 unlikely, or in some cases downright impossible, to produce
4708 something that will match the mangled name of a function.
4709 If the definition of the function has the same debug info,
4710 we should be able to match up with it anyway. But fallbacks
4711 using the minimal symbol, for instance to find a method
4712 implemented in a stripped copy of libstdc++, will not work.
4713 If we do not have debug info for the definition, we will have to
4714 match them up some other way.
4716 When we do name matching there is a related problem with function
4717 templates; two instantiated function templates are allowed to
4718 differ only by their return types, which we do not add here. */
4720 if (cu->language == language_cplus && strchr (name, '<') == NULL)
4722 struct attribute *attr;
4723 struct die_info *child;
4726 die->building_fullname = 1;
4728 for (child = die->child; child != NULL; child = child->sibling)
4733 struct dwarf2_locexpr_baton *baton;
4736 if (child->tag != DW_TAG_template_type_param
4737 && child->tag != DW_TAG_template_value_param)
4742 fputs_unfiltered ("<", buf);
4746 fputs_unfiltered (", ", buf);
4748 attr = dwarf2_attr (child, DW_AT_type, cu);
4751 complaint (&symfile_complaints,
4752 _("template parameter missing DW_AT_type"));
4753 fputs_unfiltered ("UNKNOWN_TYPE", buf);
4756 type = die_type (child, cu);
4758 if (child->tag == DW_TAG_template_type_param)
4760 c_print_type (type, "", buf, -1, 0);
4764 attr = dwarf2_attr (child, DW_AT_const_value, cu);
4767 complaint (&symfile_complaints,
4768 _("template parameter missing DW_AT_const_value"));
4769 fputs_unfiltered ("UNKNOWN_VALUE", buf);
4773 dwarf2_const_value_attr (attr, type, name,
4774 &cu->comp_unit_obstack, cu,
4775 &value, &bytes, &baton);
4777 if (TYPE_NOSIGN (type))
4778 /* GDB prints characters as NUMBER 'CHAR'. If that's
4779 changed, this can use value_print instead. */
4780 c_printchar (value, type, buf);
4783 struct value_print_options opts;
4786 v = dwarf2_evaluate_loc_desc (type, NULL,
4790 else if (bytes != NULL)
4792 v = allocate_value (type);
4793 memcpy (value_contents_writeable (v), bytes,
4794 TYPE_LENGTH (type));
4797 v = value_from_longest (type, value);
4799 /* Specify decimal so that we do not depend on the radix. */
4800 get_formatted_print_options (&opts, 'd');
4802 value_print (v, buf, &opts);
4808 die->building_fullname = 0;
4812 /* Close the argument list, with a space if necessary
4813 (nested templates). */
4814 char last_char = '\0';
4815 ui_file_put (buf, do_ui_file_peek_last, &last_char);
4816 if (last_char == '>')
4817 fputs_unfiltered (" >", buf);
4819 fputs_unfiltered (">", buf);
4823 /* For Java and C++ methods, append formal parameter type
4824 information, if PHYSNAME. */
4826 if (physname && die->tag == DW_TAG_subprogram
4827 && (cu->language == language_cplus
4828 || cu->language == language_java))
4830 struct type *type = read_type_die (die, cu);
4832 c_type_print_args (type, buf, 0, cu->language);
4834 if (cu->language == language_java)
4836 /* For java, we must append the return type to method
4838 if (die->tag == DW_TAG_subprogram)
4839 java_print_type (TYPE_TARGET_TYPE (type), "", buf,
4842 else if (cu->language == language_cplus)
4844 if (TYPE_NFIELDS (type) > 0
4845 && TYPE_FIELD_ARTIFICIAL (type, 0)
4846 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 0))))
4847 fputs_unfiltered (" const", buf);
4851 name = ui_file_obsavestring (buf, &cu->objfile->objfile_obstack,
4853 ui_file_delete (buf);
4855 if (cu->language == language_cplus)
4858 = dwarf2_canonicalize_name (name, cu,
4859 &cu->objfile->objfile_obstack);
4870 /* Return the fully qualified name of DIE, based on its DW_AT_name.
4871 If scope qualifiers are appropriate they will be added. The result
4872 will be allocated on the objfile_obstack, or NULL if the DIE does
4873 not have a name. NAME may either be from a previous call to
4874 dwarf2_name or NULL.
4876 The output string will be canonicalized (if C++/Java). */
4879 dwarf2_full_name (char *name, struct die_info *die, struct dwarf2_cu *cu)
4881 return dwarf2_compute_name (name, die, cu, 0);
4884 /* Construct a physname for the given DIE in CU. NAME may either be
4885 from a previous call to dwarf2_name or NULL. The result will be
4886 allocated on the objfile_objstack or NULL if the DIE does not have a
4889 The output string will be canonicalized (if C++/Java). */
4892 dwarf2_physname (char *name, struct die_info *die, struct dwarf2_cu *cu)
4894 return dwarf2_compute_name (name, die, cu, 1);
4897 /* Read the import statement specified by the given die and record it. */
4900 read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
4902 struct attribute *import_attr;
4903 struct die_info *imported_die;
4904 struct dwarf2_cu *imported_cu;
4905 const char *imported_name;
4906 const char *imported_name_prefix;
4907 const char *canonical_name;
4908 const char *import_alias;
4909 const char *imported_declaration = NULL;
4910 const char *import_prefix;
4914 import_attr = dwarf2_attr (die, DW_AT_import, cu);
4915 if (import_attr == NULL)
4917 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
4918 dwarf_tag_name (die->tag));
4923 imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu);
4924 imported_name = dwarf2_name (imported_die, imported_cu);
4925 if (imported_name == NULL)
4927 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
4929 The import in the following code:
4943 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
4944 <52> DW_AT_decl_file : 1
4945 <53> DW_AT_decl_line : 6
4946 <54> DW_AT_import : <0x75>
4947 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
4949 <5b> DW_AT_decl_file : 1
4950 <5c> DW_AT_decl_line : 2
4951 <5d> DW_AT_type : <0x6e>
4953 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
4954 <76> DW_AT_byte_size : 4
4955 <77> DW_AT_encoding : 5 (signed)
4957 imports the wrong die ( 0x75 instead of 0x58 ).
4958 This case will be ignored until the gcc bug is fixed. */
4962 /* Figure out the local name after import. */
4963 import_alias = dwarf2_name (die, cu);
4965 /* Figure out where the statement is being imported to. */
4966 import_prefix = determine_prefix (die, cu);
4968 /* Figure out what the scope of the imported die is and prepend it
4969 to the name of the imported die. */
4970 imported_name_prefix = determine_prefix (imported_die, imported_cu);
4972 if (imported_die->tag != DW_TAG_namespace
4973 && imported_die->tag != DW_TAG_module)
4975 imported_declaration = imported_name;
4976 canonical_name = imported_name_prefix;
4978 else if (strlen (imported_name_prefix) > 0)
4980 temp = alloca (strlen (imported_name_prefix)
4981 + 2 + strlen (imported_name) + 1);
4982 strcpy (temp, imported_name_prefix);
4983 strcat (temp, "::");
4984 strcat (temp, imported_name);
4985 canonical_name = temp;
4988 canonical_name = imported_name;
4990 cp_add_using_directive (import_prefix,
4993 imported_declaration,
4994 &cu->objfile->objfile_obstack);
4998 initialize_cu_func_list (struct dwarf2_cu *cu)
5000 cu->first_fn = cu->last_fn = cu->cached_fn = NULL;
5004 free_cu_line_header (void *arg)
5006 struct dwarf2_cu *cu = arg;
5008 free_line_header (cu->line_header);
5009 cu->line_header = NULL;
5013 find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu,
5014 char **name, char **comp_dir)
5016 struct attribute *attr;
5021 /* Find the filename. Do not use dwarf2_name here, since the filename
5022 is not a source language identifier. */
5023 attr = dwarf2_attr (die, DW_AT_name, cu);
5026 *name = DW_STRING (attr);
5029 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
5031 *comp_dir = DW_STRING (attr);
5032 else if (*name != NULL && IS_ABSOLUTE_PATH (*name))
5034 *comp_dir = ldirname (*name);
5035 if (*comp_dir != NULL)
5036 make_cleanup (xfree, *comp_dir);
5038 if (*comp_dir != NULL)
5040 /* Irix 6.2 native cc prepends <machine>.: to the compilation
5041 directory, get rid of it. */
5042 char *cp = strchr (*comp_dir, ':');
5044 if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/')
5049 *name = "<unknown>";
5053 read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
5055 struct objfile *objfile = cu->objfile;
5056 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
5057 CORE_ADDR lowpc = ((CORE_ADDR) -1);
5058 CORE_ADDR highpc = ((CORE_ADDR) 0);
5059 struct attribute *attr;
5061 char *comp_dir = NULL;
5062 struct die_info *child_die;
5063 bfd *abfd = objfile->obfd;
5064 struct line_header *line_header = 0;
5067 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5069 get_scope_pc_bounds (die, &lowpc, &highpc, cu);
5071 /* If we didn't find a lowpc, set it to highpc to avoid complaints
5072 from finish_block. */
5073 if (lowpc == ((CORE_ADDR) -1))
5078 find_file_and_directory (die, cu, &name, &comp_dir);
5080 attr = dwarf2_attr (die, DW_AT_language, cu);
5083 set_cu_language (DW_UNSND (attr), cu);
5086 attr = dwarf2_attr (die, DW_AT_producer, cu);
5088 cu->producer = DW_STRING (attr);
5090 /* We assume that we're processing GCC output. */
5091 processing_gcc_compilation = 2;
5093 processing_has_namespace_info = 0;
5095 start_symtab (name, comp_dir, lowpc);
5096 record_debugformat ("DWARF 2");
5097 record_producer (cu->producer);
5099 initialize_cu_func_list (cu);
5101 /* Decode line number information if present. We do this before
5102 processing child DIEs, so that the line header table is available
5103 for DW_AT_decl_file. */
5104 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
5107 unsigned int line_offset = DW_UNSND (attr);
5108 line_header = dwarf_decode_line_header (line_offset, abfd, cu);
5111 cu->line_header = line_header;
5112 make_cleanup (free_cu_line_header, cu);
5113 dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL);
5117 /* Process all dies in compilation unit. */
5118 if (die->child != NULL)
5120 child_die = die->child;
5121 while (child_die && child_die->tag)
5123 process_die (child_die, cu);
5124 child_die = sibling_die (child_die);
5128 /* Decode macro information, if present. Dwarf 2 macro information
5129 refers to information in the line number info statement program
5130 header, so we can only read it if we've read the header
5132 attr = dwarf2_attr (die, DW_AT_macro_info, cu);
5133 if (attr && line_header)
5135 unsigned int macro_offset = DW_UNSND (attr);
5137 dwarf_decode_macros (line_header, macro_offset,
5138 comp_dir, abfd, cu);
5140 do_cleanups (back_to);
5143 /* For TUs we want to skip the first top level sibling if it's not the
5144 actual type being defined by this TU. In this case the first top
5145 level sibling is there to provide context only. */
5148 read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
5150 struct objfile *objfile = cu->objfile;
5151 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
5153 struct attribute *attr;
5155 char *comp_dir = NULL;
5156 struct die_info *child_die;
5157 bfd *abfd = objfile->obfd;
5159 /* start_symtab needs a low pc, but we don't really have one.
5160 Do what read_file_scope would do in the absence of such info. */
5161 lowpc = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5163 /* Find the filename. Do not use dwarf2_name here, since the filename
5164 is not a source language identifier. */
5165 attr = dwarf2_attr (die, DW_AT_name, cu);
5167 name = DW_STRING (attr);
5169 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
5171 comp_dir = DW_STRING (attr);
5172 else if (name != NULL && IS_ABSOLUTE_PATH (name))
5174 comp_dir = ldirname (name);
5175 if (comp_dir != NULL)
5176 make_cleanup (xfree, comp_dir);
5182 attr = dwarf2_attr (die, DW_AT_language, cu);
5184 set_cu_language (DW_UNSND (attr), cu);
5186 /* This isn't technically needed today. It is done for symmetry
5187 with read_file_scope. */
5188 attr = dwarf2_attr (die, DW_AT_producer, cu);
5190 cu->producer = DW_STRING (attr);
5192 /* We assume that we're processing GCC output. */
5193 processing_gcc_compilation = 2;
5195 processing_has_namespace_info = 0;
5197 start_symtab (name, comp_dir, lowpc);
5198 record_debugformat ("DWARF 2");
5199 record_producer (cu->producer);
5201 /* Process the dies in the type unit. */
5202 if (die->child == NULL)
5204 dump_die_for_error (die);
5205 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
5206 bfd_get_filename (abfd));
5209 child_die = die->child;
5211 while (child_die && child_die->tag)
5213 process_die (child_die, cu);
5215 child_die = sibling_die (child_die);
5218 do_cleanups (back_to);
5222 add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc,
5223 struct dwarf2_cu *cu)
5225 struct function_range *thisfn;
5227 thisfn = (struct function_range *)
5228 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range));
5229 thisfn->name = name;
5230 thisfn->lowpc = lowpc;
5231 thisfn->highpc = highpc;
5232 thisfn->seen_line = 0;
5233 thisfn->next = NULL;
5235 if (cu->last_fn == NULL)
5236 cu->first_fn = thisfn;
5238 cu->last_fn->next = thisfn;
5240 cu->last_fn = thisfn;
5243 /* qsort helper for inherit_abstract_dies. */
5246 unsigned_int_compar (const void *ap, const void *bp)
5248 unsigned int a = *(unsigned int *) ap;
5249 unsigned int b = *(unsigned int *) bp;
5251 return (a > b) - (b > a);
5254 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
5255 Inherit only the children of the DW_AT_abstract_origin DIE not being already
5256 referenced by DW_AT_abstract_origin from the children of the current DIE. */
5259 inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
5261 struct die_info *child_die;
5262 unsigned die_children_count;
5263 /* CU offsets which were referenced by children of the current DIE. */
5265 unsigned *offsets_end, *offsetp;
5266 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
5267 struct die_info *origin_die;
5268 /* Iterator of the ORIGIN_DIE children. */
5269 struct die_info *origin_child_die;
5270 struct cleanup *cleanups;
5271 struct attribute *attr;
5272 struct dwarf2_cu *origin_cu;
5273 struct pending **origin_previous_list_in_scope;
5275 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
5279 /* Note that following die references may follow to a die in a
5283 origin_die = follow_die_ref (die, attr, &origin_cu);
5285 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
5287 origin_previous_list_in_scope = origin_cu->list_in_scope;
5288 origin_cu->list_in_scope = cu->list_in_scope;
5290 if (die->tag != origin_die->tag
5291 && !(die->tag == DW_TAG_inlined_subroutine
5292 && origin_die->tag == DW_TAG_subprogram))
5293 complaint (&symfile_complaints,
5294 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
5295 die->offset, origin_die->offset);
5297 child_die = die->child;
5298 die_children_count = 0;
5299 while (child_die && child_die->tag)
5301 child_die = sibling_die (child_die);
5302 die_children_count++;
5304 offsets = xmalloc (sizeof (*offsets) * die_children_count);
5305 cleanups = make_cleanup (xfree, offsets);
5307 offsets_end = offsets;
5308 child_die = die->child;
5309 while (child_die && child_die->tag)
5311 /* For each CHILD_DIE, find the corresponding child of
5312 ORIGIN_DIE. If there is more than one layer of
5313 DW_AT_abstract_origin, follow them all; there shouldn't be,
5314 but GCC versions at least through 4.4 generate this (GCC PR
5316 struct die_info *child_origin_die = child_die;
5317 struct dwarf2_cu *child_origin_cu = cu;
5321 attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin,
5325 child_origin_die = follow_die_ref (child_origin_die, attr,
5329 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
5330 counterpart may exist. */
5331 if (child_origin_die != child_die)
5333 if (child_die->tag != child_origin_die->tag
5334 && !(child_die->tag == DW_TAG_inlined_subroutine
5335 && child_origin_die->tag == DW_TAG_subprogram))
5336 complaint (&symfile_complaints,
5337 _("Child DIE 0x%x and its abstract origin 0x%x have "
5338 "different tags"), child_die->offset,
5339 child_origin_die->offset);
5340 if (child_origin_die->parent != origin_die)
5341 complaint (&symfile_complaints,
5342 _("Child DIE 0x%x and its abstract origin 0x%x have "
5343 "different parents"), child_die->offset,
5344 child_origin_die->offset);
5346 *offsets_end++ = child_origin_die->offset;
5348 child_die = sibling_die (child_die);
5350 qsort (offsets, offsets_end - offsets, sizeof (*offsets),
5351 unsigned_int_compar);
5352 for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++)
5353 if (offsetp[-1] == *offsetp)
5354 complaint (&symfile_complaints, _("Multiple children of DIE 0x%x refer "
5355 "to DIE 0x%x as their abstract origin"),
5356 die->offset, *offsetp);
5359 origin_child_die = origin_die->child;
5360 while (origin_child_die && origin_child_die->tag)
5362 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
5363 while (offsetp < offsets_end && *offsetp < origin_child_die->offset)
5365 if (offsetp >= offsets_end || *offsetp > origin_child_die->offset)
5367 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
5368 process_die (origin_child_die, origin_cu);
5370 origin_child_die = sibling_die (origin_child_die);
5372 origin_cu->list_in_scope = origin_previous_list_in_scope;
5374 do_cleanups (cleanups);
5378 read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
5380 struct objfile *objfile = cu->objfile;
5381 struct context_stack *new;
5384 struct die_info *child_die;
5385 struct attribute *attr, *call_line, *call_file;
5388 struct block *block;
5389 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
5390 VEC (symbolp) *template_args = NULL;
5391 struct template_symbol *templ_func = NULL;
5395 /* If we do not have call site information, we can't show the
5396 caller of this inlined function. That's too confusing, so
5397 only use the scope for local variables. */
5398 call_line = dwarf2_attr (die, DW_AT_call_line, cu);
5399 call_file = dwarf2_attr (die, DW_AT_call_file, cu);
5400 if (call_line == NULL || call_file == NULL)
5402 read_lexical_block_scope (die, cu);
5407 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5409 name = dwarf2_name (die, cu);
5411 /* Ignore functions with missing or empty names. These are actually
5412 illegal according to the DWARF standard. */
5415 complaint (&symfile_complaints,
5416 _("missing name for subprogram DIE at %d"), die->offset);
5420 /* Ignore functions with missing or invalid low and high pc attributes. */
5421 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
5423 attr = dwarf2_attr (die, DW_AT_external, cu);
5424 if (!attr || !DW_UNSND (attr))
5425 complaint (&symfile_complaints,
5426 _("cannot get low and high bounds for subprogram DIE at %d"),
5434 /* Record the function range for dwarf_decode_lines. */
5435 add_to_cu_func_list (name, lowpc, highpc, cu);
5437 /* If we have any template arguments, then we must allocate a
5438 different sort of symbol. */
5439 for (child_die = die->child; child_die; child_die = sibling_die (child_die))
5441 if (child_die->tag == DW_TAG_template_type_param
5442 || child_die->tag == DW_TAG_template_value_param)
5444 templ_func = OBSTACK_ZALLOC (&objfile->objfile_obstack,
5445 struct template_symbol);
5446 templ_func->base.is_cplus_template_function = 1;
5451 new = push_context (0, lowpc);
5452 new->name = new_symbol_full (die, read_type_die (die, cu), cu,
5453 (struct symbol *) templ_func);
5455 /* If there is a location expression for DW_AT_frame_base, record
5457 attr = dwarf2_attr (die, DW_AT_frame_base, cu);
5459 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
5460 expression is being recorded directly in the function's symbol
5461 and not in a separate frame-base object. I guess this hack is
5462 to avoid adding some sort of frame-base adjunct/annex to the
5463 function's symbol :-(. The problem with doing this is that it
5464 results in a function symbol with a location expression that
5465 has nothing to do with the location of the function, ouch! The
5466 relationship should be: a function's symbol has-a frame base; a
5467 frame-base has-a location expression. */
5468 dwarf2_symbol_mark_computed (attr, new->name, cu);
5470 cu->list_in_scope = &local_symbols;
5472 if (die->child != NULL)
5474 child_die = die->child;
5475 while (child_die && child_die->tag)
5477 if (child_die->tag == DW_TAG_template_type_param
5478 || child_die->tag == DW_TAG_template_value_param)
5480 struct symbol *arg = new_symbol (child_die, NULL, cu);
5482 VEC_safe_push (symbolp, template_args, arg);
5485 process_die (child_die, cu);
5486 child_die = sibling_die (child_die);
5490 inherit_abstract_dies (die, cu);
5492 /* If we have a DW_AT_specification, we might need to import using
5493 directives from the context of the specification DIE. See the
5494 comment in determine_prefix. */
5495 if (cu->language == language_cplus
5496 && dwarf2_attr (die, DW_AT_specification, cu))
5498 struct dwarf2_cu *spec_cu = cu;
5499 struct die_info *spec_die = die_specification (die, &spec_cu);
5503 child_die = spec_die->child;
5504 while (child_die && child_die->tag)
5506 if (child_die->tag == DW_TAG_imported_module)
5507 process_die (child_die, spec_cu);
5508 child_die = sibling_die (child_die);
5511 /* In some cases, GCC generates specification DIEs that
5512 themselves contain DW_AT_specification attributes. */
5513 spec_die = die_specification (spec_die, &spec_cu);
5517 new = pop_context ();
5518 /* Make a block for the local symbols within. */
5519 block = finish_block (new->name, &local_symbols, new->old_blocks,
5520 lowpc, highpc, objfile);
5522 /* For C++, set the block's scope. */
5523 if (cu->language == language_cplus || cu->language == language_fortran)
5524 cp_set_block_scope (new->name, block, &objfile->objfile_obstack,
5525 determine_prefix (die, cu),
5526 processing_has_namespace_info);
5528 /* If we have address ranges, record them. */
5529 dwarf2_record_block_ranges (die, block, baseaddr, cu);
5531 /* Attach template arguments to function. */
5532 if (! VEC_empty (symbolp, template_args))
5534 gdb_assert (templ_func != NULL);
5536 templ_func->n_template_arguments = VEC_length (symbolp, template_args);
5537 templ_func->template_arguments
5538 = obstack_alloc (&objfile->objfile_obstack,
5539 (templ_func->n_template_arguments
5540 * sizeof (struct symbol *)));
5541 memcpy (templ_func->template_arguments,
5542 VEC_address (symbolp, template_args),
5543 (templ_func->n_template_arguments * sizeof (struct symbol *)));
5544 VEC_free (symbolp, template_args);
5547 /* In C++, we can have functions nested inside functions (e.g., when
5548 a function declares a class that has methods). This means that
5549 when we finish processing a function scope, we may need to go
5550 back to building a containing block's symbol lists. */
5551 local_symbols = new->locals;
5552 param_symbols = new->params;
5553 using_directives = new->using_directives;
5555 /* If we've finished processing a top-level function, subsequent
5556 symbols go in the file symbol list. */
5557 if (outermost_context_p ())
5558 cu->list_in_scope = &file_symbols;
5561 /* Process all the DIES contained within a lexical block scope. Start
5562 a new scope, process the dies, and then close the scope. */
5565 read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
5567 struct objfile *objfile = cu->objfile;
5568 struct context_stack *new;
5569 CORE_ADDR lowpc, highpc;
5570 struct die_info *child_die;
5573 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5575 /* Ignore blocks with missing or invalid low and high pc attributes. */
5576 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
5577 as multiple lexical blocks? Handling children in a sane way would
5578 be nasty. Might be easier to properly extend generic blocks to
5580 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
5585 push_context (0, lowpc);
5586 if (die->child != NULL)
5588 child_die = die->child;
5589 while (child_die && child_die->tag)
5591 process_die (child_die, cu);
5592 child_die = sibling_die (child_die);
5595 new = pop_context ();
5597 if (local_symbols != NULL || using_directives != NULL)
5600 = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
5603 /* Note that recording ranges after traversing children, as we
5604 do here, means that recording a parent's ranges entails
5605 walking across all its children's ranges as they appear in
5606 the address map, which is quadratic behavior.
5608 It would be nicer to record the parent's ranges before
5609 traversing its children, simply overriding whatever you find
5610 there. But since we don't even decide whether to create a
5611 block until after we've traversed its children, that's hard
5613 dwarf2_record_block_ranges (die, block, baseaddr, cu);
5615 local_symbols = new->locals;
5616 using_directives = new->using_directives;
5619 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
5620 Return 1 if the attributes are present and valid, otherwise, return 0.
5621 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
5624 dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
5625 CORE_ADDR *high_return, struct dwarf2_cu *cu,
5626 struct partial_symtab *ranges_pst)
5628 struct objfile *objfile = cu->objfile;
5629 struct comp_unit_head *cu_header = &cu->header;
5630 bfd *obfd = objfile->obfd;
5631 unsigned int addr_size = cu_header->addr_size;
5632 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
5633 /* Base address selection entry. */
5644 found_base = cu->base_known;
5645 base = cu->base_address;
5647 dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
5648 if (offset >= dwarf2_per_objfile->ranges.size)
5650 complaint (&symfile_complaints,
5651 _("Offset %d out of bounds for DW_AT_ranges attribute"),
5655 buffer = dwarf2_per_objfile->ranges.buffer + offset;
5657 /* Read in the largest possible address. */
5658 marker = read_address (obfd, buffer, cu, &dummy);
5659 if ((marker & mask) == mask)
5661 /* If we found the largest possible address, then
5662 read the base address. */
5663 base = read_address (obfd, buffer + addr_size, cu, &dummy);
5664 buffer += 2 * addr_size;
5665 offset += 2 * addr_size;
5671 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5675 CORE_ADDR range_beginning, range_end;
5677 range_beginning = read_address (obfd, buffer, cu, &dummy);
5678 buffer += addr_size;
5679 range_end = read_address (obfd, buffer, cu, &dummy);
5680 buffer += addr_size;
5681 offset += 2 * addr_size;
5683 /* An end of list marker is a pair of zero addresses. */
5684 if (range_beginning == 0 && range_end == 0)
5685 /* Found the end of list entry. */
5688 /* Each base address selection entry is a pair of 2 values.
5689 The first is the largest possible address, the second is
5690 the base address. Check for a base address here. */
5691 if ((range_beginning & mask) == mask)
5693 /* If we found the largest possible address, then
5694 read the base address. */
5695 base = read_address (obfd, buffer + addr_size, cu, &dummy);
5702 /* We have no valid base address for the ranges
5704 complaint (&symfile_complaints,
5705 _("Invalid .debug_ranges data (no base address)"));
5709 range_beginning += base;
5712 if (ranges_pst != NULL && range_beginning < range_end)
5713 addrmap_set_empty (objfile->psymtabs_addrmap,
5714 range_beginning + baseaddr, range_end - 1 + baseaddr,
5717 /* FIXME: This is recording everything as a low-high
5718 segment of consecutive addresses. We should have a
5719 data structure for discontiguous block ranges
5723 low = range_beginning;
5729 if (range_beginning < low)
5730 low = range_beginning;
5731 if (range_end > high)
5737 /* If the first entry is an end-of-list marker, the range
5738 describes an empty scope, i.e. no instructions. */
5744 *high_return = high;
5748 /* Get low and high pc attributes from a die. Return 1 if the attributes
5749 are present and valid, otherwise, return 0. Return -1 if the range is
5750 discontinuous, i.e. derived from DW_AT_ranges information. */
5752 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
5753 CORE_ADDR *highpc, struct dwarf2_cu *cu,
5754 struct partial_symtab *pst)
5756 struct attribute *attr;
5761 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
5764 high = DW_ADDR (attr);
5765 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
5767 low = DW_ADDR (attr);
5769 /* Found high w/o low attribute. */
5772 /* Found consecutive range of addresses. */
5777 attr = dwarf2_attr (die, DW_AT_ranges, cu);
5780 /* Value of the DW_AT_ranges attribute is the offset in the
5781 .debug_ranges section. */
5782 if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu, pst))
5784 /* Found discontinuous range of addresses. */
5792 /* When using the GNU linker, .gnu.linkonce. sections are used to
5793 eliminate duplicate copies of functions and vtables and such.
5794 The linker will arbitrarily choose one and discard the others.
5795 The AT_*_pc values for such functions refer to local labels in
5796 these sections. If the section from that file was discarded, the
5797 labels are not in the output, so the relocs get a value of 0.
5798 If this is a discarded function, mark the pc bounds as invalid,
5799 so that GDB will ignore it. */
5800 if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
5808 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
5809 its low and high PC addresses. Do nothing if these addresses could not
5810 be determined. Otherwise, set LOWPC to the low address if it is smaller,
5811 and HIGHPC to the high address if greater than HIGHPC. */
5814 dwarf2_get_subprogram_pc_bounds (struct die_info *die,
5815 CORE_ADDR *lowpc, CORE_ADDR *highpc,
5816 struct dwarf2_cu *cu)
5818 CORE_ADDR low, high;
5819 struct die_info *child = die->child;
5821 if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL))
5823 *lowpc = min (*lowpc, low);
5824 *highpc = max (*highpc, high);
5827 /* If the language does not allow nested subprograms (either inside
5828 subprograms or lexical blocks), we're done. */
5829 if (cu->language != language_ada)
5832 /* Check all the children of the given DIE. If it contains nested
5833 subprograms, then check their pc bounds. Likewise, we need to
5834 check lexical blocks as well, as they may also contain subprogram
5836 while (child && child->tag)
5838 if (child->tag == DW_TAG_subprogram
5839 || child->tag == DW_TAG_lexical_block)
5840 dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu);
5841 child = sibling_die (child);
5845 /* Get the low and high pc's represented by the scope DIE, and store
5846 them in *LOWPC and *HIGHPC. If the correct values can't be
5847 determined, set *LOWPC to -1 and *HIGHPC to 0. */
5850 get_scope_pc_bounds (struct die_info *die,
5851 CORE_ADDR *lowpc, CORE_ADDR *highpc,
5852 struct dwarf2_cu *cu)
5854 CORE_ADDR best_low = (CORE_ADDR) -1;
5855 CORE_ADDR best_high = (CORE_ADDR) 0;
5856 CORE_ADDR current_low, current_high;
5858 if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL))
5860 best_low = current_low;
5861 best_high = current_high;
5865 struct die_info *child = die->child;
5867 while (child && child->tag)
5869 switch (child->tag) {
5870 case DW_TAG_subprogram:
5871 dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu);
5873 case DW_TAG_namespace:
5875 /* FIXME: carlton/2004-01-16: Should we do this for
5876 DW_TAG_class_type/DW_TAG_structure_type, too? I think
5877 that current GCC's always emit the DIEs corresponding
5878 to definitions of methods of classes as children of a
5879 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
5880 the DIEs giving the declarations, which could be
5881 anywhere). But I don't see any reason why the
5882 standards says that they have to be there. */
5883 get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
5885 if (current_low != ((CORE_ADDR) -1))
5887 best_low = min (best_low, current_low);
5888 best_high = max (best_high, current_high);
5896 child = sibling_die (child);
5901 *highpc = best_high;
5904 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
5907 dwarf2_record_block_ranges (struct die_info *die, struct block *block,
5908 CORE_ADDR baseaddr, struct dwarf2_cu *cu)
5910 struct attribute *attr;
5912 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
5915 CORE_ADDR high = DW_ADDR (attr);
5917 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
5920 CORE_ADDR low = DW_ADDR (attr);
5922 record_block_range (block, baseaddr + low, baseaddr + high - 1);
5926 attr = dwarf2_attr (die, DW_AT_ranges, cu);
5929 bfd *obfd = cu->objfile->obfd;
5931 /* The value of the DW_AT_ranges attribute is the offset of the
5932 address range list in the .debug_ranges section. */
5933 unsigned long offset = DW_UNSND (attr);
5934 gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset;
5936 /* For some target architectures, but not others, the
5937 read_address function sign-extends the addresses it returns.
5938 To recognize base address selection entries, we need a
5940 unsigned int addr_size = cu->header.addr_size;
5941 CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
5943 /* The base address, to which the next pair is relative. Note
5944 that this 'base' is a DWARF concept: most entries in a range
5945 list are relative, to reduce the number of relocs against the
5946 debugging information. This is separate from this function's
5947 'baseaddr' argument, which GDB uses to relocate debugging
5948 information from a shared library based on the address at
5949 which the library was loaded. */
5950 CORE_ADDR base = cu->base_address;
5951 int base_known = cu->base_known;
5953 gdb_assert (dwarf2_per_objfile->ranges.readin);
5954 if (offset >= dwarf2_per_objfile->ranges.size)
5956 complaint (&symfile_complaints,
5957 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
5964 unsigned int bytes_read;
5965 CORE_ADDR start, end;
5967 start = read_address (obfd, buffer, cu, &bytes_read);
5968 buffer += bytes_read;
5969 end = read_address (obfd, buffer, cu, &bytes_read);
5970 buffer += bytes_read;
5972 /* Did we find the end of the range list? */
5973 if (start == 0 && end == 0)
5976 /* Did we find a base address selection entry? */
5977 else if ((start & base_select_mask) == base_select_mask)
5983 /* We found an ordinary address range. */
5988 complaint (&symfile_complaints,
5989 _("Invalid .debug_ranges data (no base address)"));
5993 record_block_range (block,
5994 baseaddr + base + start,
5995 baseaddr + base + end - 1);
6001 /* Add an aggregate field to the field list. */
6004 dwarf2_add_field (struct field_info *fip, struct die_info *die,
6005 struct dwarf2_cu *cu)
6007 struct objfile *objfile = cu->objfile;
6008 struct gdbarch *gdbarch = get_objfile_arch (objfile);
6009 struct nextfield *new_field;
6010 struct attribute *attr;
6012 char *fieldname = "";
6014 /* Allocate a new field list entry and link it in. */
6015 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
6016 make_cleanup (xfree, new_field);
6017 memset (new_field, 0, sizeof (struct nextfield));
6019 if (die->tag == DW_TAG_inheritance)
6021 new_field->next = fip->baseclasses;
6022 fip->baseclasses = new_field;
6026 new_field->next = fip->fields;
6027 fip->fields = new_field;
6031 /* Handle accessibility and virtuality of field.
6032 The default accessibility for members is public, the default
6033 accessibility for inheritance is private. */
6034 if (die->tag != DW_TAG_inheritance)
6035 new_field->accessibility = DW_ACCESS_public;
6037 new_field->accessibility = DW_ACCESS_private;
6038 new_field->virtuality = DW_VIRTUALITY_none;
6040 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
6042 new_field->accessibility = DW_UNSND (attr);
6043 if (new_field->accessibility != DW_ACCESS_public)
6044 fip->non_public_fields = 1;
6045 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
6047 new_field->virtuality = DW_UNSND (attr);
6049 fp = &new_field->field;
6051 if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
6053 /* Data member other than a C++ static data member. */
6055 /* Get type of field. */
6056 fp->type = die_type (die, cu);
6058 SET_FIELD_BITPOS (*fp, 0);
6060 /* Get bit size of field (zero if none). */
6061 attr = dwarf2_attr (die, DW_AT_bit_size, cu);
6064 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
6068 FIELD_BITSIZE (*fp) = 0;
6071 /* Get bit offset of field. */
6072 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
6075 int byte_offset = 0;
6077 if (attr_form_is_section_offset (attr))
6078 dwarf2_complex_location_expr_complaint ();
6079 else if (attr_form_is_constant (attr))
6080 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
6081 else if (attr_form_is_block (attr))
6082 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
6084 dwarf2_complex_location_expr_complaint ();
6086 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
6088 attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
6091 if (gdbarch_bits_big_endian (gdbarch))
6093 /* For big endian bits, the DW_AT_bit_offset gives the
6094 additional bit offset from the MSB of the containing
6095 anonymous object to the MSB of the field. We don't
6096 have to do anything special since we don't need to
6097 know the size of the anonymous object. */
6098 FIELD_BITPOS (*fp) += DW_UNSND (attr);
6102 /* For little endian bits, compute the bit offset to the
6103 MSB of the anonymous object, subtract off the number of
6104 bits from the MSB of the field to the MSB of the
6105 object, and then subtract off the number of bits of
6106 the field itself. The result is the bit offset of
6107 the LSB of the field. */
6109 int bit_offset = DW_UNSND (attr);
6111 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6114 /* The size of the anonymous object containing
6115 the bit field is explicit, so use the
6116 indicated size (in bytes). */
6117 anonymous_size = DW_UNSND (attr);
6121 /* The size of the anonymous object containing
6122 the bit field must be inferred from the type
6123 attribute of the data member containing the
6125 anonymous_size = TYPE_LENGTH (fp->type);
6127 FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
6128 - bit_offset - FIELD_BITSIZE (*fp);
6132 /* Get name of field. */
6133 fieldname = dwarf2_name (die, cu);
6134 if (fieldname == NULL)
6137 /* The name is already allocated along with this objfile, so we don't
6138 need to duplicate it for the type. */
6139 fp->name = fieldname;
6141 /* Change accessibility for artificial fields (e.g. virtual table
6142 pointer or virtual base class pointer) to private. */
6143 if (dwarf2_attr (die, DW_AT_artificial, cu))
6145 FIELD_ARTIFICIAL (*fp) = 1;
6146 new_field->accessibility = DW_ACCESS_private;
6147 fip->non_public_fields = 1;
6150 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
6152 /* C++ static member. */
6154 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
6155 is a declaration, but all versions of G++ as of this writing
6156 (so through at least 3.2.1) incorrectly generate
6157 DW_TAG_variable tags. */
6161 /* Get name of field. */
6162 fieldname = dwarf2_name (die, cu);
6163 if (fieldname == NULL)
6166 attr = dwarf2_attr (die, DW_AT_const_value, cu);
6168 /* Only create a symbol if this is an external value.
6169 new_symbol checks this and puts the value in the global symbol
6170 table, which we want. If it is not external, new_symbol
6171 will try to put the value in cu->list_in_scope which is wrong. */
6172 && dwarf2_flag_true_p (die, DW_AT_external, cu))
6174 /* A static const member, not much different than an enum as far as
6175 we're concerned, except that we can support more types. */
6176 new_symbol (die, NULL, cu);
6179 /* Get physical name. */
6180 physname = (char *) dwarf2_physname (fieldname, die, cu);
6182 /* The name is already allocated along with this objfile, so we don't
6183 need to duplicate it for the type. */
6184 SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
6185 FIELD_TYPE (*fp) = die_type (die, cu);
6186 FIELD_NAME (*fp) = fieldname;
6188 else if (die->tag == DW_TAG_inheritance)
6190 /* C++ base class field. */
6191 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
6194 int byte_offset = 0;
6196 if (attr_form_is_section_offset (attr))
6197 dwarf2_complex_location_expr_complaint ();
6198 else if (attr_form_is_constant (attr))
6199 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
6200 else if (attr_form_is_block (attr))
6201 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
6203 dwarf2_complex_location_expr_complaint ();
6205 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
6207 FIELD_BITSIZE (*fp) = 0;
6208 FIELD_TYPE (*fp) = die_type (die, cu);
6209 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
6210 fip->nbaseclasses++;
6214 /* Add a typedef defined in the scope of the FIP's class. */
6217 dwarf2_add_typedef (struct field_info *fip, struct die_info *die,
6218 struct dwarf2_cu *cu)
6220 struct objfile *objfile = cu->objfile;
6221 struct gdbarch *gdbarch = get_objfile_arch (objfile);
6222 struct typedef_field_list *new_field;
6223 struct attribute *attr;
6224 struct typedef_field *fp;
6225 char *fieldname = "";
6227 /* Allocate a new field list entry and link it in. */
6228 new_field = xzalloc (sizeof (*new_field));
6229 make_cleanup (xfree, new_field);
6231 gdb_assert (die->tag == DW_TAG_typedef);
6233 fp = &new_field->field;
6235 /* Get name of field. */
6236 fp->name = dwarf2_name (die, cu);
6237 if (fp->name == NULL)
6240 fp->type = read_type_die (die, cu);
6242 new_field->next = fip->typedef_field_list;
6243 fip->typedef_field_list = new_field;
6244 fip->typedef_field_list_count++;
6247 /* Create the vector of fields, and attach it to the type. */
6250 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
6251 struct dwarf2_cu *cu)
6253 int nfields = fip->nfields;
6255 /* Record the field count, allocate space for the array of fields,
6256 and create blank accessibility bitfields if necessary. */
6257 TYPE_NFIELDS (type) = nfields;
6258 TYPE_FIELDS (type) = (struct field *)
6259 TYPE_ALLOC (type, sizeof (struct field) * nfields);
6260 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
6262 if (fip->non_public_fields && cu->language != language_ada)
6264 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6266 TYPE_FIELD_PRIVATE_BITS (type) =
6267 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
6268 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
6270 TYPE_FIELD_PROTECTED_BITS (type) =
6271 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
6272 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
6274 TYPE_FIELD_IGNORE_BITS (type) =
6275 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
6276 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
6279 /* If the type has baseclasses, allocate and clear a bit vector for
6280 TYPE_FIELD_VIRTUAL_BITS. */
6281 if (fip->nbaseclasses && cu->language != language_ada)
6283 int num_bytes = B_BYTES (fip->nbaseclasses);
6284 unsigned char *pointer;
6286 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6287 pointer = TYPE_ALLOC (type, num_bytes);
6288 TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
6289 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
6290 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
6293 /* Copy the saved-up fields into the field vector. Start from the head
6294 of the list, adding to the tail of the field array, so that they end
6295 up in the same order in the array in which they were added to the list. */
6296 while (nfields-- > 0)
6298 struct nextfield *fieldp;
6302 fieldp = fip->fields;
6303 fip->fields = fieldp->next;
6307 fieldp = fip->baseclasses;
6308 fip->baseclasses = fieldp->next;
6311 TYPE_FIELD (type, nfields) = fieldp->field;
6312 switch (fieldp->accessibility)
6314 case DW_ACCESS_private:
6315 if (cu->language != language_ada)
6316 SET_TYPE_FIELD_PRIVATE (type, nfields);
6319 case DW_ACCESS_protected:
6320 if (cu->language != language_ada)
6321 SET_TYPE_FIELD_PROTECTED (type, nfields);
6324 case DW_ACCESS_public:
6328 /* Unknown accessibility. Complain and treat it as public. */
6330 complaint (&symfile_complaints, _("unsupported accessibility %d"),
6331 fieldp->accessibility);
6335 if (nfields < fip->nbaseclasses)
6337 switch (fieldp->virtuality)
6339 case DW_VIRTUALITY_virtual:
6340 case DW_VIRTUALITY_pure_virtual:
6341 if (cu->language == language_ada)
6342 error ("unexpected virtuality in component of Ada type");
6343 SET_TYPE_FIELD_VIRTUAL (type, nfields);
6350 /* Add a member function to the proper fieldlist. */
6353 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
6354 struct type *type, struct dwarf2_cu *cu)
6356 struct objfile *objfile = cu->objfile;
6357 struct attribute *attr;
6358 struct fnfieldlist *flp;
6360 struct fn_field *fnp;
6362 struct nextfnfield *new_fnfield;
6363 struct type *this_type;
6365 if (cu->language == language_ada)
6366 error ("unexpected member function in Ada type");
6368 /* Get name of member function. */
6369 fieldname = dwarf2_name (die, cu);
6370 if (fieldname == NULL)
6373 /* Look up member function name in fieldlist. */
6374 for (i = 0; i < fip->nfnfields; i++)
6376 if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
6380 /* Create new list element if necessary. */
6381 if (i < fip->nfnfields)
6382 flp = &fip->fnfieldlists[i];
6385 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
6387 fip->fnfieldlists = (struct fnfieldlist *)
6388 xrealloc (fip->fnfieldlists,
6389 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
6390 * sizeof (struct fnfieldlist));
6391 if (fip->nfnfields == 0)
6392 make_cleanup (free_current_contents, &fip->fnfieldlists);
6394 flp = &fip->fnfieldlists[fip->nfnfields];
6395 flp->name = fieldname;
6398 i = fip->nfnfields++;
6401 /* Create a new member function field and chain it to the field list
6403 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
6404 make_cleanup (xfree, new_fnfield);
6405 memset (new_fnfield, 0, sizeof (struct nextfnfield));
6406 new_fnfield->next = flp->head;
6407 flp->head = new_fnfield;
6410 /* Fill in the member function field info. */
6411 fnp = &new_fnfield->fnfield;
6413 /* Delay processing of the physname until later. */
6414 if (cu->language == language_cplus || cu->language == language_java)
6416 add_to_method_list (type, i, flp->length - 1, fieldname,
6421 char *physname = (char *) dwarf2_physname (fieldname, die, cu);
6422 fnp->physname = physname ? physname : "";
6425 fnp->type = alloc_type (objfile);
6426 this_type = read_type_die (die, cu);
6427 if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC)
6429 int nparams = TYPE_NFIELDS (this_type);
6431 /* TYPE is the domain of this method, and THIS_TYPE is the type
6432 of the method itself (TYPE_CODE_METHOD). */
6433 smash_to_method_type (fnp->type, type,
6434 TYPE_TARGET_TYPE (this_type),
6435 TYPE_FIELDS (this_type),
6436 TYPE_NFIELDS (this_type),
6437 TYPE_VARARGS (this_type));
6439 /* Handle static member functions.
6440 Dwarf2 has no clean way to discern C++ static and non-static
6441 member functions. G++ helps GDB by marking the first
6442 parameter for non-static member functions (which is the
6443 this pointer) as artificial. We obtain this information
6444 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
6445 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0)
6446 fnp->voffset = VOFFSET_STATIC;
6449 complaint (&symfile_complaints, _("member function type missing for '%s'"),
6450 dwarf2_full_name (fieldname, die, cu));
6452 /* Get fcontext from DW_AT_containing_type if present. */
6453 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
6454 fnp->fcontext = die_containing_type (die, cu);
6456 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
6457 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
6459 /* Get accessibility. */
6460 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
6463 switch (DW_UNSND (attr))
6465 case DW_ACCESS_private:
6466 fnp->is_private = 1;
6468 case DW_ACCESS_protected:
6469 fnp->is_protected = 1;
6474 /* Check for artificial methods. */
6475 attr = dwarf2_attr (die, DW_AT_artificial, cu);
6476 if (attr && DW_UNSND (attr) != 0)
6477 fnp->is_artificial = 1;
6479 /* Get index in virtual function table if it is a virtual member
6480 function. For older versions of GCC, this is an offset in the
6481 appropriate virtual table, as specified by DW_AT_containing_type.
6482 For everyone else, it is an expression to be evaluated relative
6483 to the object address. */
6485 attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
6488 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0)
6490 if (DW_BLOCK (attr)->data[0] == DW_OP_constu)
6492 /* Old-style GCC. */
6493 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
6495 else if (DW_BLOCK (attr)->data[0] == DW_OP_deref
6496 || (DW_BLOCK (attr)->size > 1
6497 && DW_BLOCK (attr)->data[0] == DW_OP_deref_size
6498 && DW_BLOCK (attr)->data[1] == cu->header.addr_size))
6500 struct dwarf_block blk;
6503 offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref
6505 blk.size = DW_BLOCK (attr)->size - offset;
6506 blk.data = DW_BLOCK (attr)->data + offset;
6507 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu);
6508 if ((fnp->voffset % cu->header.addr_size) != 0)
6509 dwarf2_complex_location_expr_complaint ();
6511 fnp->voffset /= cu->header.addr_size;
6515 dwarf2_complex_location_expr_complaint ();
6518 fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0));
6520 else if (attr_form_is_section_offset (attr))
6522 dwarf2_complex_location_expr_complaint ();
6526 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
6532 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
6533 if (attr && DW_UNSND (attr))
6535 /* GCC does this, as of 2008-08-25; PR debug/37237. */
6536 complaint (&symfile_complaints,
6537 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
6538 fieldname, die->offset);
6539 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6540 TYPE_CPLUS_DYNAMIC (type) = 1;
6545 /* Create the vector of member function fields, and attach it to the type. */
6548 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
6549 struct dwarf2_cu *cu)
6551 struct fnfieldlist *flp;
6552 int total_length = 0;
6555 if (cu->language == language_ada)
6556 error ("unexpected member functions in Ada type");
6558 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6559 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
6560 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
6562 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
6564 struct nextfnfield *nfp = flp->head;
6565 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
6568 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
6569 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
6570 fn_flp->fn_fields = (struct fn_field *)
6571 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
6572 for (k = flp->length; (k--, nfp); nfp = nfp->next)
6573 fn_flp->fn_fields[k] = nfp->fnfield;
6575 total_length += flp->length;
6578 TYPE_NFN_FIELDS (type) = fip->nfnfields;
6579 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
6582 /* Returns non-zero if NAME is the name of a vtable member in CU's
6583 language, zero otherwise. */
6585 is_vtable_name (const char *name, struct dwarf2_cu *cu)
6587 static const char vptr[] = "_vptr";
6588 static const char vtable[] = "vtable";
6590 /* Look for the C++ and Java forms of the vtable. */
6591 if ((cu->language == language_java
6592 && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
6593 || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
6594 && is_cplus_marker (name[sizeof (vptr) - 1])))
6600 /* GCC outputs unnamed structures that are really pointers to member
6601 functions, with the ABI-specified layout. If TYPE describes
6602 such a structure, smash it into a member function type.
6604 GCC shouldn't do this; it should just output pointer to member DIEs.
6605 This is GCC PR debug/28767. */
6608 quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile)
6610 struct type *pfn_type, *domain_type, *new_type;
6612 /* Check for a structure with no name and two children. */
6613 if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2)
6616 /* Check for __pfn and __delta members. */
6617 if (TYPE_FIELD_NAME (type, 0) == NULL
6618 || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0
6619 || TYPE_FIELD_NAME (type, 1) == NULL
6620 || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0)
6623 /* Find the type of the method. */
6624 pfn_type = TYPE_FIELD_TYPE (type, 0);
6625 if (pfn_type == NULL
6626 || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
6627 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
6630 /* Look for the "this" argument. */
6631 pfn_type = TYPE_TARGET_TYPE (pfn_type);
6632 if (TYPE_NFIELDS (pfn_type) == 0
6633 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
6634 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
6637 domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
6638 new_type = alloc_type (objfile);
6639 smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type),
6640 TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
6641 TYPE_VARARGS (pfn_type));
6642 smash_to_methodptr_type (type, new_type);
6645 /* Called when we find the DIE that starts a structure or union scope
6646 (definition) to create a type for the structure or union. Fill in
6647 the type's name and general properties; the members will not be
6648 processed until process_structure_type.
6650 NOTE: we need to call these functions regardless of whether or not the
6651 DIE has a DW_AT_name attribute, since it might be an anonymous
6652 structure or union. This gets the type entered into our set of
6655 However, if the structure is incomplete (an opaque struct/union)
6656 then suppress creating a symbol table entry for it since gdb only
6657 wants to find the one with the complete definition. Note that if
6658 it is complete, we just call new_symbol, which does it's own
6659 checking about whether the struct/union is anonymous or not (and
6660 suppresses creating a symbol table entry itself). */
6662 static struct type *
6663 read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
6665 struct objfile *objfile = cu->objfile;
6667 struct attribute *attr;
6670 /* If the definition of this type lives in .debug_types, read that type.
6671 Don't follow DW_AT_specification though, that will take us back up
6672 the chain and we want to go down. */
6673 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
6676 struct dwarf2_cu *type_cu = cu;
6677 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
6679 /* We could just recurse on read_structure_type, but we need to call
6680 get_die_type to ensure only one type for this DIE is created.
6681 This is important, for example, because for c++ classes we need
6682 TYPE_NAME set which is only done by new_symbol. Blech. */
6683 type = read_type_die (type_die, type_cu);
6685 /* TYPE_CU may not be the same as CU.
6686 Ensure TYPE is recorded in CU's type_hash table. */
6687 return set_die_type (die, type, cu);
6690 type = alloc_type (objfile);
6691 INIT_CPLUS_SPECIFIC (type);
6693 name = dwarf2_name (die, cu);
6696 if (cu->language == language_cplus
6697 || cu->language == language_java)
6699 char *full_name = (char *) dwarf2_full_name (name, die, cu);
6701 /* dwarf2_full_name might have already finished building the DIE's
6702 type. If so, there is no need to continue. */
6703 if (get_die_type (die, cu) != NULL)
6704 return get_die_type (die, cu);
6706 TYPE_TAG_NAME (type) = full_name;
6707 if (die->tag == DW_TAG_structure_type
6708 || die->tag == DW_TAG_class_type)
6709 TYPE_NAME (type) = TYPE_TAG_NAME (type);
6713 /* The name is already allocated along with this objfile, so
6714 we don't need to duplicate it for the type. */
6715 TYPE_TAG_NAME (type) = (char *) name;
6716 if (die->tag == DW_TAG_class_type)
6717 TYPE_NAME (type) = TYPE_TAG_NAME (type);
6721 if (die->tag == DW_TAG_structure_type)
6723 TYPE_CODE (type) = TYPE_CODE_STRUCT;
6725 else if (die->tag == DW_TAG_union_type)
6727 TYPE_CODE (type) = TYPE_CODE_UNION;
6731 TYPE_CODE (type) = TYPE_CODE_CLASS;
6734 if (cu->language == language_cplus && die->tag == DW_TAG_class_type)
6735 TYPE_DECLARED_CLASS (type) = 1;
6737 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6740 TYPE_LENGTH (type) = DW_UNSND (attr);
6744 TYPE_LENGTH (type) = 0;
6747 TYPE_STUB_SUPPORTED (type) = 1;
6748 if (die_is_declaration (die, cu))
6749 TYPE_STUB (type) = 1;
6750 else if (attr == NULL && die->child == NULL
6751 && producer_is_realview (cu->producer))
6752 /* RealView does not output the required DW_AT_declaration
6753 on incomplete types. */
6754 TYPE_STUB (type) = 1;
6756 /* We need to add the type field to the die immediately so we don't
6757 infinitely recurse when dealing with pointers to the structure
6758 type within the structure itself. */
6759 set_die_type (die, type, cu);
6761 /* set_die_type should be already done. */
6762 set_descriptive_type (type, die, cu);
6767 /* Finish creating a structure or union type, including filling in
6768 its members and creating a symbol for it. */
6771 process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
6773 struct objfile *objfile = cu->objfile;
6774 struct die_info *child_die = die->child;
6777 type = get_die_type (die, cu);
6779 type = read_structure_type (die, cu);
6781 if (die->child != NULL && ! die_is_declaration (die, cu))
6783 struct field_info fi;
6784 struct die_info *child_die;
6785 VEC (symbolp) *template_args = NULL;
6786 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
6788 memset (&fi, 0, sizeof (struct field_info));
6790 child_die = die->child;
6792 while (child_die && child_die->tag)
6794 if (child_die->tag == DW_TAG_member
6795 || child_die->tag == DW_TAG_variable)
6797 /* NOTE: carlton/2002-11-05: A C++ static data member
6798 should be a DW_TAG_member that is a declaration, but
6799 all versions of G++ as of this writing (so through at
6800 least 3.2.1) incorrectly generate DW_TAG_variable
6801 tags for them instead. */
6802 dwarf2_add_field (&fi, child_die, cu);
6804 else if (child_die->tag == DW_TAG_subprogram)
6806 /* C++ member function. */
6807 dwarf2_add_member_fn (&fi, child_die, type, cu);
6809 else if (child_die->tag == DW_TAG_inheritance)
6811 /* C++ base class field. */
6812 dwarf2_add_field (&fi, child_die, cu);
6814 else if (child_die->tag == DW_TAG_typedef)
6815 dwarf2_add_typedef (&fi, child_die, cu);
6816 else if (child_die->tag == DW_TAG_template_type_param
6817 || child_die->tag == DW_TAG_template_value_param)
6819 struct symbol *arg = new_symbol (child_die, NULL, cu);
6821 VEC_safe_push (symbolp, template_args, arg);
6824 child_die = sibling_die (child_die);
6827 /* Attach template arguments to type. */
6828 if (! VEC_empty (symbolp, template_args))
6830 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6831 TYPE_N_TEMPLATE_ARGUMENTS (type)
6832 = VEC_length (symbolp, template_args);
6833 TYPE_TEMPLATE_ARGUMENTS (type)
6834 = obstack_alloc (&objfile->objfile_obstack,
6835 (TYPE_N_TEMPLATE_ARGUMENTS (type)
6836 * sizeof (struct symbol *)));
6837 memcpy (TYPE_TEMPLATE_ARGUMENTS (type),
6838 VEC_address (symbolp, template_args),
6839 (TYPE_N_TEMPLATE_ARGUMENTS (type)
6840 * sizeof (struct symbol *)));
6841 VEC_free (symbolp, template_args);
6844 /* Attach fields and member functions to the type. */
6846 dwarf2_attach_fields_to_type (&fi, type, cu);
6849 dwarf2_attach_fn_fields_to_type (&fi, type, cu);
6851 /* Get the type which refers to the base class (possibly this
6852 class itself) which contains the vtable pointer for the current
6853 class from the DW_AT_containing_type attribute. This use of
6854 DW_AT_containing_type is a GNU extension. */
6856 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
6858 struct type *t = die_containing_type (die, cu);
6860 TYPE_VPTR_BASETYPE (type) = t;
6865 /* Our own class provides vtbl ptr. */
6866 for (i = TYPE_NFIELDS (t) - 1;
6867 i >= TYPE_N_BASECLASSES (t);
6870 char *fieldname = TYPE_FIELD_NAME (t, i);
6872 if (is_vtable_name (fieldname, cu))
6874 TYPE_VPTR_FIELDNO (type) = i;
6879 /* Complain if virtual function table field not found. */
6880 if (i < TYPE_N_BASECLASSES (t))
6881 complaint (&symfile_complaints,
6882 _("virtual function table pointer not found when defining class '%s'"),
6883 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
6888 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
6891 else if (cu->producer
6892 && strncmp (cu->producer,
6893 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
6895 /* The IBM XLC compiler does not provide direct indication
6896 of the containing type, but the vtable pointer is
6897 always named __vfp. */
6901 for (i = TYPE_NFIELDS (type) - 1;
6902 i >= TYPE_N_BASECLASSES (type);
6905 if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
6907 TYPE_VPTR_FIELDNO (type) = i;
6908 TYPE_VPTR_BASETYPE (type) = type;
6915 /* Copy fi.typedef_field_list linked list elements content into the
6916 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
6917 if (fi.typedef_field_list)
6919 int i = fi.typedef_field_list_count;
6921 ALLOCATE_CPLUS_STRUCT_TYPE (type);
6922 TYPE_TYPEDEF_FIELD_ARRAY (type)
6923 = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i);
6924 TYPE_TYPEDEF_FIELD_COUNT (type) = i;
6926 /* Reverse the list order to keep the debug info elements order. */
6929 struct typedef_field *dest, *src;
6931 dest = &TYPE_TYPEDEF_FIELD (type, i);
6932 src = &fi.typedef_field_list->field;
6933 fi.typedef_field_list = fi.typedef_field_list->next;
6938 do_cleanups (back_to);
6941 quirk_gcc_member_function_pointer (type, cu->objfile);
6943 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
6944 snapshots) has been known to create a die giving a declaration
6945 for a class that has, as a child, a die giving a definition for a
6946 nested class. So we have to process our children even if the
6947 current die is a declaration. Normally, of course, a declaration
6948 won't have any children at all. */
6950 while (child_die != NULL && child_die->tag)
6952 if (child_die->tag == DW_TAG_member
6953 || child_die->tag == DW_TAG_variable
6954 || child_die->tag == DW_TAG_inheritance
6955 || child_die->tag == DW_TAG_template_value_param
6956 || child_die->tag == DW_TAG_template_type_param)
6961 process_die (child_die, cu);
6963 child_die = sibling_die (child_die);
6966 /* Do not consider external references. According to the DWARF standard,
6967 these DIEs are identified by the fact that they have no byte_size
6968 attribute, and a declaration attribute. */
6969 if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
6970 || !die_is_declaration (die, cu))
6971 new_symbol (die, type, cu);
6974 /* Given a DW_AT_enumeration_type die, set its type. We do not
6975 complete the type's fields yet, or create any symbols. */
6977 static struct type *
6978 read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
6980 struct objfile *objfile = cu->objfile;
6982 struct attribute *attr;
6985 /* If the definition of this type lives in .debug_types, read that type.
6986 Don't follow DW_AT_specification though, that will take us back up
6987 the chain and we want to go down. */
6988 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
6991 struct dwarf2_cu *type_cu = cu;
6992 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
6994 type = read_type_die (type_die, type_cu);
6996 /* TYPE_CU may not be the same as CU.
6997 Ensure TYPE is recorded in CU's type_hash table. */
6998 return set_die_type (die, type, cu);
7001 type = alloc_type (objfile);
7003 TYPE_CODE (type) = TYPE_CODE_ENUM;
7004 name = dwarf2_full_name (NULL, die, cu);
7006 TYPE_TAG_NAME (type) = (char *) name;
7008 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7011 TYPE_LENGTH (type) = DW_UNSND (attr);
7015 TYPE_LENGTH (type) = 0;
7018 /* The enumeration DIE can be incomplete. In Ada, any type can be
7019 declared as private in the package spec, and then defined only
7020 inside the package body. Such types are known as Taft Amendment
7021 Types. When another package uses such a type, an incomplete DIE
7022 may be generated by the compiler. */
7023 if (die_is_declaration (die, cu))
7024 TYPE_STUB (type) = 1;
7026 return set_die_type (die, type, cu);
7029 /* Given a pointer to a die which begins an enumeration, process all
7030 the dies that define the members of the enumeration, and create the
7031 symbol for the enumeration type.
7033 NOTE: We reverse the order of the element list. */
7036 process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
7038 struct type *this_type;
7040 this_type = get_die_type (die, cu);
7041 if (this_type == NULL)
7042 this_type = read_enumeration_type (die, cu);
7044 if (die->child != NULL)
7046 struct die_info *child_die;
7048 struct field *fields = NULL;
7050 int unsigned_enum = 1;
7053 child_die = die->child;
7054 while (child_die && child_die->tag)
7056 if (child_die->tag != DW_TAG_enumerator)
7058 process_die (child_die, cu);
7062 name = dwarf2_name (child_die, cu);
7065 sym = new_symbol (child_die, this_type, cu);
7066 if (SYMBOL_VALUE (sym) < 0)
7069 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
7071 fields = (struct field *)
7073 (num_fields + DW_FIELD_ALLOC_CHUNK)
7074 * sizeof (struct field));
7077 FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym);
7078 FIELD_TYPE (fields[num_fields]) = NULL;
7079 SET_FIELD_BITPOS (fields[num_fields], SYMBOL_VALUE (sym));
7080 FIELD_BITSIZE (fields[num_fields]) = 0;
7086 child_die = sibling_die (child_die);
7091 TYPE_NFIELDS (this_type) = num_fields;
7092 TYPE_FIELDS (this_type) = (struct field *)
7093 TYPE_ALLOC (this_type, sizeof (struct field) * num_fields);
7094 memcpy (TYPE_FIELDS (this_type), fields,
7095 sizeof (struct field) * num_fields);
7099 TYPE_UNSIGNED (this_type) = 1;
7102 new_symbol (die, this_type, cu);
7105 /* Extract all information from a DW_TAG_array_type DIE and put it in
7106 the DIE's type field. For now, this only handles one dimensional
7109 static struct type *
7110 read_array_type (struct die_info *die, struct dwarf2_cu *cu)
7112 struct objfile *objfile = cu->objfile;
7113 struct die_info *child_die;
7115 struct type *element_type, *range_type, *index_type;
7116 struct type **range_types = NULL;
7117 struct attribute *attr;
7119 struct cleanup *back_to;
7122 element_type = die_type (die, cu);
7124 /* The die_type call above may have already set the type for this DIE. */
7125 type = get_die_type (die, cu);
7129 /* Irix 6.2 native cc creates array types without children for
7130 arrays with unspecified length. */
7131 if (die->child == NULL)
7133 index_type = objfile_type (objfile)->builtin_int;
7134 range_type = create_range_type (NULL, index_type, 0, -1);
7135 type = create_array_type (NULL, element_type, range_type);
7136 return set_die_type (die, type, cu);
7139 back_to = make_cleanup (null_cleanup, NULL);
7140 child_die = die->child;
7141 while (child_die && child_die->tag)
7143 if (child_die->tag == DW_TAG_subrange_type)
7145 struct type *child_type = read_type_die (child_die, cu);
7147 if (child_type != NULL)
7149 /* The range type was succesfully read. Save it for
7150 the array type creation. */
7151 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
7153 range_types = (struct type **)
7154 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
7155 * sizeof (struct type *));
7157 make_cleanup (free_current_contents, &range_types);
7159 range_types[ndim++] = child_type;
7162 child_die = sibling_die (child_die);
7165 /* Dwarf2 dimensions are output from left to right, create the
7166 necessary array types in backwards order. */
7168 type = element_type;
7170 if (read_array_order (die, cu) == DW_ORD_col_major)
7175 type = create_array_type (NULL, type, range_types[i++]);
7180 type = create_array_type (NULL, type, range_types[ndim]);
7183 /* Understand Dwarf2 support for vector types (like they occur on
7184 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
7185 array type. This is not part of the Dwarf2/3 standard yet, but a
7186 custom vendor extension. The main difference between a regular
7187 array and the vector variant is that vectors are passed by value
7189 attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
7191 make_vector_type (type);
7193 name = dwarf2_name (die, cu);
7195 TYPE_NAME (type) = name;
7197 /* Install the type in the die. */
7198 set_die_type (die, type, cu);
7200 /* set_die_type should be already done. */
7201 set_descriptive_type (type, die, cu);
7203 do_cleanups (back_to);
7208 static enum dwarf_array_dim_ordering
7209 read_array_order (struct die_info *die, struct dwarf2_cu *cu)
7211 struct attribute *attr;
7213 attr = dwarf2_attr (die, DW_AT_ordering, cu);
7215 if (attr) return DW_SND (attr);
7218 GNU F77 is a special case, as at 08/2004 array type info is the
7219 opposite order to the dwarf2 specification, but data is still
7220 laid out as per normal fortran.
7222 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
7226 if (cu->language == language_fortran
7227 && cu->producer && strstr (cu->producer, "GNU F77"))
7229 return DW_ORD_row_major;
7232 switch (cu->language_defn->la_array_ordering)
7234 case array_column_major:
7235 return DW_ORD_col_major;
7236 case array_row_major:
7238 return DW_ORD_row_major;
7242 /* Extract all information from a DW_TAG_set_type DIE and put it in
7243 the DIE's type field. */
7245 static struct type *
7246 read_set_type (struct die_info *die, struct dwarf2_cu *cu)
7248 struct type *domain_type, *set_type;
7249 struct attribute *attr;
7251 domain_type = die_type (die, cu);
7253 /* The die_type call above may have already set the type for this DIE. */
7254 set_type = get_die_type (die, cu);
7258 set_type = create_set_type (NULL, domain_type);
7260 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7262 TYPE_LENGTH (set_type) = DW_UNSND (attr);
7264 return set_die_type (die, set_type, cu);
7267 /* First cut: install each common block member as a global variable. */
7270 read_common_block (struct die_info *die, struct dwarf2_cu *cu)
7272 struct die_info *child_die;
7273 struct attribute *attr;
7275 CORE_ADDR base = (CORE_ADDR) 0;
7277 attr = dwarf2_attr (die, DW_AT_location, cu);
7280 /* Support the .debug_loc offsets */
7281 if (attr_form_is_block (attr))
7283 base = decode_locdesc (DW_BLOCK (attr), cu);
7285 else if (attr_form_is_section_offset (attr))
7287 dwarf2_complex_location_expr_complaint ();
7291 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
7292 "common block member");
7295 if (die->child != NULL)
7297 child_die = die->child;
7298 while (child_die && child_die->tag)
7300 sym = new_symbol (child_die, NULL, cu);
7301 attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu);
7304 CORE_ADDR byte_offset = 0;
7306 if (attr_form_is_section_offset (attr))
7307 dwarf2_complex_location_expr_complaint ();
7308 else if (attr_form_is_constant (attr))
7309 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
7310 else if (attr_form_is_block (attr))
7311 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
7313 dwarf2_complex_location_expr_complaint ();
7315 SYMBOL_VALUE_ADDRESS (sym) = base + byte_offset;
7316 add_symbol_to_list (sym, &global_symbols);
7318 child_die = sibling_die (child_die);
7323 /* Create a type for a C++ namespace. */
7325 static struct type *
7326 read_namespace_type (struct die_info *die, struct dwarf2_cu *cu)
7328 struct objfile *objfile = cu->objfile;
7329 const char *previous_prefix, *name;
7333 /* For extensions, reuse the type of the original namespace. */
7334 if (dwarf2_attr (die, DW_AT_extension, cu) != NULL)
7336 struct die_info *ext_die;
7337 struct dwarf2_cu *ext_cu = cu;
7339 ext_die = dwarf2_extension (die, &ext_cu);
7340 type = read_type_die (ext_die, ext_cu);
7342 /* EXT_CU may not be the same as CU.
7343 Ensure TYPE is recorded in CU's type_hash table. */
7344 return set_die_type (die, type, cu);
7347 name = namespace_name (die, &is_anonymous, cu);
7349 /* Now build the name of the current namespace. */
7351 previous_prefix = determine_prefix (die, cu);
7352 if (previous_prefix[0] != '\0')
7353 name = typename_concat (&objfile->objfile_obstack,
7354 previous_prefix, name, 0, cu);
7356 /* Create the type. */
7357 type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL,
7359 TYPE_NAME (type) = (char *) name;
7360 TYPE_TAG_NAME (type) = TYPE_NAME (type);
7362 return set_die_type (die, type, cu);
7365 /* Read a C++ namespace. */
7368 read_namespace (struct die_info *die, struct dwarf2_cu *cu)
7370 struct objfile *objfile = cu->objfile;
7374 /* Add a symbol associated to this if we haven't seen the namespace
7375 before. Also, add a using directive if it's an anonymous
7378 if (dwarf2_attr (die, DW_AT_extension, cu) == NULL)
7382 type = read_type_die (die, cu);
7383 new_symbol (die, type, cu);
7385 name = namespace_name (die, &is_anonymous, cu);
7388 const char *previous_prefix = determine_prefix (die, cu);
7390 cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL,
7391 NULL, &objfile->objfile_obstack);
7395 if (die->child != NULL)
7397 struct die_info *child_die = die->child;
7399 while (child_die && child_die->tag)
7401 process_die (child_die, cu);
7402 child_die = sibling_die (child_die);
7407 /* Read a Fortran module as type. This DIE can be only a declaration used for
7408 imported module. Still we need that type as local Fortran "use ... only"
7409 declaration imports depend on the created type in determine_prefix. */
7411 static struct type *
7412 read_module_type (struct die_info *die, struct dwarf2_cu *cu)
7414 struct objfile *objfile = cu->objfile;
7418 module_name = dwarf2_name (die, cu);
7420 complaint (&symfile_complaints, _("DW_TAG_module has no name, offset 0x%x"),
7422 type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile);
7424 /* determine_prefix uses TYPE_TAG_NAME. */
7425 TYPE_TAG_NAME (type) = TYPE_NAME (type);
7427 return set_die_type (die, type, cu);
7430 /* Read a Fortran module. */
7433 read_module (struct die_info *die, struct dwarf2_cu *cu)
7435 struct die_info *child_die = die->child;
7437 while (child_die && child_die->tag)
7439 process_die (child_die, cu);
7440 child_die = sibling_die (child_die);
7444 /* Return the name of the namespace represented by DIE. Set
7445 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
7449 namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
7451 struct die_info *current_die;
7452 const char *name = NULL;
7454 /* Loop through the extensions until we find a name. */
7456 for (current_die = die;
7457 current_die != NULL;
7458 current_die = dwarf2_extension (die, &cu))
7460 name = dwarf2_name (current_die, cu);
7465 /* Is it an anonymous namespace? */
7467 *is_anonymous = (name == NULL);
7469 name = "(anonymous namespace)";
7474 /* Extract all information from a DW_TAG_pointer_type DIE and add to
7475 the user defined type vector. */
7477 static struct type *
7478 read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
7480 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
7481 struct comp_unit_head *cu_header = &cu->header;
7483 struct attribute *attr_byte_size;
7484 struct attribute *attr_address_class;
7485 int byte_size, addr_class;
7486 struct type *target_type;
7488 target_type = die_type (die, cu);
7490 /* The die_type call above may have already set the type for this DIE. */
7491 type = get_die_type (die, cu);
7495 type = lookup_pointer_type (target_type);
7497 attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
7499 byte_size = DW_UNSND (attr_byte_size);
7501 byte_size = cu_header->addr_size;
7503 attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
7504 if (attr_address_class)
7505 addr_class = DW_UNSND (attr_address_class);
7507 addr_class = DW_ADDR_none;
7509 /* If the pointer size or address class is different than the
7510 default, create a type variant marked as such and set the
7511 length accordingly. */
7512 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
7514 if (gdbarch_address_class_type_flags_p (gdbarch))
7518 type_flags = gdbarch_address_class_type_flags
7519 (gdbarch, byte_size, addr_class);
7520 gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
7522 type = make_type_with_address_space (type, type_flags);
7524 else if (TYPE_LENGTH (type) != byte_size)
7526 complaint (&symfile_complaints, _("invalid pointer size %d"), byte_size);
7530 /* Should we also complain about unhandled address classes? */
7534 TYPE_LENGTH (type) = byte_size;
7535 return set_die_type (die, type, cu);
7538 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
7539 the user defined type vector. */
7541 static struct type *
7542 read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
7545 struct type *to_type;
7546 struct type *domain;
7548 to_type = die_type (die, cu);
7549 domain = die_containing_type (die, cu);
7551 /* The calls above may have already set the type for this DIE. */
7552 type = get_die_type (die, cu);
7556 if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
7557 type = lookup_methodptr_type (to_type);
7559 type = lookup_memberptr_type (to_type, domain);
7561 return set_die_type (die, type, cu);
7564 /* Extract all information from a DW_TAG_reference_type DIE and add to
7565 the user defined type vector. */
7567 static struct type *
7568 read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
7570 struct comp_unit_head *cu_header = &cu->header;
7571 struct type *type, *target_type;
7572 struct attribute *attr;
7574 target_type = die_type (die, cu);
7576 /* The die_type call above may have already set the type for this DIE. */
7577 type = get_die_type (die, cu);
7581 type = lookup_reference_type (target_type);
7582 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7585 TYPE_LENGTH (type) = DW_UNSND (attr);
7589 TYPE_LENGTH (type) = cu_header->addr_size;
7591 return set_die_type (die, type, cu);
7594 static struct type *
7595 read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
7597 struct type *base_type, *cv_type;
7599 base_type = die_type (die, cu);
7601 /* The die_type call above may have already set the type for this DIE. */
7602 cv_type = get_die_type (die, cu);
7606 cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
7607 return set_die_type (die, cv_type, cu);
7610 static struct type *
7611 read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
7613 struct type *base_type, *cv_type;
7615 base_type = die_type (die, cu);
7617 /* The die_type call above may have already set the type for this DIE. */
7618 cv_type = get_die_type (die, cu);
7622 cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
7623 return set_die_type (die, cv_type, cu);
7626 /* Extract all information from a DW_TAG_string_type DIE and add to
7627 the user defined type vector. It isn't really a user defined type,
7628 but it behaves like one, with other DIE's using an AT_user_def_type
7629 attribute to reference it. */
7631 static struct type *
7632 read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
7634 struct objfile *objfile = cu->objfile;
7635 struct gdbarch *gdbarch = get_objfile_arch (objfile);
7636 struct type *type, *range_type, *index_type, *char_type;
7637 struct attribute *attr;
7638 unsigned int length;
7640 attr = dwarf2_attr (die, DW_AT_string_length, cu);
7643 length = DW_UNSND (attr);
7647 /* check for the DW_AT_byte_size attribute */
7648 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7651 length = DW_UNSND (attr);
7659 index_type = objfile_type (objfile)->builtin_int;
7660 range_type = create_range_type (NULL, index_type, 1, length);
7661 char_type = language_string_char_type (cu->language_defn, gdbarch);
7662 type = create_string_type (NULL, char_type, range_type);
7664 return set_die_type (die, type, cu);
7667 /* Handle DIES due to C code like:
7671 int (*funcp)(int a, long l);
7675 ('funcp' generates a DW_TAG_subroutine_type DIE)
7678 static struct type *
7679 read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
7681 struct type *type; /* Type that this function returns */
7682 struct type *ftype; /* Function that returns above type */
7683 struct attribute *attr;
7685 type = die_type (die, cu);
7687 /* The die_type call above may have already set the type for this DIE. */
7688 ftype = get_die_type (die, cu);
7692 ftype = lookup_function_type (type);
7694 /* All functions in C++, Pascal and Java have prototypes. */
7695 attr = dwarf2_attr (die, DW_AT_prototyped, cu);
7696 if ((attr && (DW_UNSND (attr) != 0))
7697 || cu->language == language_cplus
7698 || cu->language == language_java
7699 || cu->language == language_pascal)
7700 TYPE_PROTOTYPED (ftype) = 1;
7701 else if (producer_is_realview (cu->producer))
7702 /* RealView does not emit DW_AT_prototyped. We can not
7703 distinguish prototyped and unprototyped functions; default to
7704 prototyped, since that is more common in modern code (and
7705 RealView warns about unprototyped functions). */
7706 TYPE_PROTOTYPED (ftype) = 1;
7708 /* Store the calling convention in the type if it's available in
7709 the subroutine die. Otherwise set the calling convention to
7710 the default value DW_CC_normal. */
7711 attr = dwarf2_attr (die, DW_AT_calling_convention, cu);
7712 TYPE_CALLING_CONVENTION (ftype) = attr ? DW_UNSND (attr) : DW_CC_normal;
7714 /* We need to add the subroutine type to the die immediately so
7715 we don't infinitely recurse when dealing with parameters
7716 declared as the same subroutine type. */
7717 set_die_type (die, ftype, cu);
7719 if (die->child != NULL)
7721 struct type *void_type = objfile_type (cu->objfile)->builtin_void;
7722 struct die_info *child_die;
7723 int nparams, iparams;
7725 /* Count the number of parameters.
7726 FIXME: GDB currently ignores vararg functions, but knows about
7727 vararg member functions. */
7729 child_die = die->child;
7730 while (child_die && child_die->tag)
7732 if (child_die->tag == DW_TAG_formal_parameter)
7734 else if (child_die->tag == DW_TAG_unspecified_parameters)
7735 TYPE_VARARGS (ftype) = 1;
7736 child_die = sibling_die (child_die);
7739 /* Allocate storage for parameters and fill them in. */
7740 TYPE_NFIELDS (ftype) = nparams;
7741 TYPE_FIELDS (ftype) = (struct field *)
7742 TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
7744 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
7745 even if we error out during the parameters reading below. */
7746 for (iparams = 0; iparams < nparams; iparams++)
7747 TYPE_FIELD_TYPE (ftype, iparams) = void_type;
7750 child_die = die->child;
7751 while (child_die && child_die->tag)
7753 if (child_die->tag == DW_TAG_formal_parameter)
7755 struct type *arg_type;
7757 /* DWARF version 2 has no clean way to discern C++
7758 static and non-static member functions. G++ helps
7759 GDB by marking the first parameter for non-static
7760 member functions (which is the this pointer) as
7761 artificial. We pass this information to
7762 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
7764 DWARF version 3 added DW_AT_object_pointer, which GCC
7765 4.5 does not yet generate. */
7766 attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
7768 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
7771 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
7773 /* GCC/43521: In java, the formal parameter
7774 "this" is sometimes not marked with DW_AT_artificial. */
7775 if (cu->language == language_java)
7777 const char *name = dwarf2_name (child_die, cu);
7779 if (name && !strcmp (name, "this"))
7780 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1;
7783 arg_type = die_type (child_die, cu);
7785 /* RealView does not mark THIS as const, which the testsuite
7786 expects. GCC marks THIS as const in method definitions,
7787 but not in the class specifications (GCC PR 43053). */
7788 if (cu->language == language_cplus && !TYPE_CONST (arg_type)
7789 && TYPE_FIELD_ARTIFICIAL (ftype, iparams))
7792 struct dwarf2_cu *arg_cu = cu;
7793 const char *name = dwarf2_name (child_die, cu);
7795 attr = dwarf2_attr (die, DW_AT_object_pointer, cu);
7798 /* If the compiler emits this, use it. */
7799 if (follow_die_ref (die, attr, &arg_cu) == child_die)
7802 else if (name && strcmp (name, "this") == 0)
7803 /* Function definitions will have the argument names. */
7805 else if (name == NULL && iparams == 0)
7806 /* Declarations may not have the names, so like
7807 elsewhere in GDB, assume an artificial first
7808 argument is "this". */
7812 arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type),
7816 TYPE_FIELD_TYPE (ftype, iparams) = arg_type;
7819 child_die = sibling_die (child_die);
7826 static struct type *
7827 read_typedef (struct die_info *die, struct dwarf2_cu *cu)
7829 struct objfile *objfile = cu->objfile;
7830 const char *name = NULL;
7831 struct type *this_type;
7833 name = dwarf2_full_name (NULL, die, cu);
7834 this_type = init_type (TYPE_CODE_TYPEDEF, 0,
7835 TYPE_FLAG_TARGET_STUB, NULL, objfile);
7836 TYPE_NAME (this_type) = (char *) name;
7837 set_die_type (die, this_type, cu);
7838 TYPE_TARGET_TYPE (this_type) = die_type (die, cu);
7842 /* Find a representation of a given base type and install
7843 it in the TYPE field of the die. */
7845 static struct type *
7846 read_base_type (struct die_info *die, struct dwarf2_cu *cu)
7848 struct objfile *objfile = cu->objfile;
7850 struct attribute *attr;
7851 int encoding = 0, size = 0;
7853 enum type_code code = TYPE_CODE_INT;
7855 struct type *target_type = NULL;
7857 attr = dwarf2_attr (die, DW_AT_encoding, cu);
7860 encoding = DW_UNSND (attr);
7862 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
7865 size = DW_UNSND (attr);
7867 name = dwarf2_name (die, cu);
7870 complaint (&symfile_complaints,
7871 _("DW_AT_name missing from DW_TAG_base_type"));
7876 case DW_ATE_address:
7877 /* Turn DW_ATE_address into a void * pointer. */
7878 code = TYPE_CODE_PTR;
7879 type_flags |= TYPE_FLAG_UNSIGNED;
7880 target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
7882 case DW_ATE_boolean:
7883 code = TYPE_CODE_BOOL;
7884 type_flags |= TYPE_FLAG_UNSIGNED;
7886 case DW_ATE_complex_float:
7887 code = TYPE_CODE_COMPLEX;
7888 target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
7890 case DW_ATE_decimal_float:
7891 code = TYPE_CODE_DECFLOAT;
7894 code = TYPE_CODE_FLT;
7898 case DW_ATE_unsigned:
7899 type_flags |= TYPE_FLAG_UNSIGNED;
7901 case DW_ATE_signed_char:
7902 if (cu->language == language_ada || cu->language == language_m2
7903 || cu->language == language_pascal)
7904 code = TYPE_CODE_CHAR;
7906 case DW_ATE_unsigned_char:
7907 if (cu->language == language_ada || cu->language == language_m2
7908 || cu->language == language_pascal)
7909 code = TYPE_CODE_CHAR;
7910 type_flags |= TYPE_FLAG_UNSIGNED;
7913 /* We just treat this as an integer and then recognize the
7914 type by name elsewhere. */
7918 complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
7919 dwarf_type_encoding_name (encoding));
7923 type = init_type (code, size, type_flags, NULL, objfile);
7924 TYPE_NAME (type) = name;
7925 TYPE_TARGET_TYPE (type) = target_type;
7927 if (name && strcmp (name, "char") == 0)
7928 TYPE_NOSIGN (type) = 1;
7930 return set_die_type (die, type, cu);
7933 /* Read the given DW_AT_subrange DIE. */
7935 static struct type *
7936 read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
7938 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
7939 struct type *base_type;
7940 struct type *range_type;
7941 struct attribute *attr;
7945 LONGEST negative_mask;
7947 base_type = die_type (die, cu);
7948 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
7949 check_typedef (base_type);
7951 /* The die_type call above may have already set the type for this DIE. */
7952 range_type = get_die_type (die, cu);
7956 if (cu->language == language_fortran)
7958 /* FORTRAN implies a lower bound of 1, if not given. */
7962 /* FIXME: For variable sized arrays either of these could be
7963 a variable rather than a constant value. We'll allow it,
7964 but we don't know how to handle it. */
7965 attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
7967 low = dwarf2_get_attr_constant_value (attr, 0);
7969 attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
7972 if (attr->form == DW_FORM_block1 || is_ref_attr (attr))
7974 /* GCC encodes arrays with unspecified or dynamic length
7975 with a DW_FORM_block1 attribute or a reference attribute.
7976 FIXME: GDB does not yet know how to handle dynamic
7977 arrays properly, treat them as arrays with unspecified
7980 FIXME: jimb/2003-09-22: GDB does not really know
7981 how to handle arrays of unspecified length
7982 either; we just represent them as zero-length
7983 arrays. Choose an appropriate upper bound given
7984 the lower bound we've computed above. */
7988 high = dwarf2_get_attr_constant_value (attr, 1);
7992 attr = dwarf2_attr (die, DW_AT_count, cu);
7995 int count = dwarf2_get_attr_constant_value (attr, 1);
7996 high = low + count - 1;
8000 /* Dwarf-2 specifications explicitly allows to create subrange types
8001 without specifying a base type.
8002 In that case, the base type must be set to the type of
8003 the lower bound, upper bound or count, in that order, if any of these
8004 three attributes references an object that has a type.
8005 If no base type is found, the Dwarf-2 specifications say that
8006 a signed integer type of size equal to the size of an address should
8008 For the following C code: `extern char gdb_int [];'
8009 GCC produces an empty range DIE.
8010 FIXME: muller/2010-05-28: Possible references to object for low bound,
8011 high bound or count are not yet handled by this code.
8013 if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
8015 struct objfile *objfile = cu->objfile;
8016 struct gdbarch *gdbarch = get_objfile_arch (objfile);
8017 int addr_size = gdbarch_addr_bit (gdbarch) /8;
8018 struct type *int_type = objfile_type (objfile)->builtin_int;
8020 /* Test "int", "long int", and "long long int" objfile types,
8021 and select the first one having a size above or equal to the
8022 architecture address size. */
8023 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
8024 base_type = int_type;
8027 int_type = objfile_type (objfile)->builtin_long;
8028 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
8029 base_type = int_type;
8032 int_type = objfile_type (objfile)->builtin_long_long;
8033 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
8034 base_type = int_type;
8040 (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1);
8041 if (!TYPE_UNSIGNED (base_type) && (low & negative_mask))
8042 low |= negative_mask;
8043 if (!TYPE_UNSIGNED (base_type) && (high & negative_mask))
8044 high |= negative_mask;
8046 range_type = create_range_type (NULL, base_type, low, high);
8048 /* Mark arrays with dynamic length at least as an array of unspecified
8049 length. GDB could check the boundary but before it gets implemented at
8050 least allow accessing the array elements. */
8051 if (attr && attr->form == DW_FORM_block1)
8052 TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1;
8054 name = dwarf2_name (die, cu);
8056 TYPE_NAME (range_type) = name;
8058 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
8060 TYPE_LENGTH (range_type) = DW_UNSND (attr);
8062 set_die_type (die, range_type, cu);
8064 /* set_die_type should be already done. */
8065 set_descriptive_type (range_type, die, cu);
8070 static struct type *
8071 read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
8075 /* For now, we only support the C meaning of an unspecified type: void. */
8077 type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile);
8078 TYPE_NAME (type) = dwarf2_name (die, cu);
8080 return set_die_type (die, type, cu);
8083 /* Trivial hash function for die_info: the hash value of a DIE
8084 is its offset in .debug_info for this objfile. */
8087 die_hash (const void *item)
8089 const struct die_info *die = item;
8094 /* Trivial comparison function for die_info structures: two DIEs
8095 are equal if they have the same offset. */
8098 die_eq (const void *item_lhs, const void *item_rhs)
8100 const struct die_info *die_lhs = item_lhs;
8101 const struct die_info *die_rhs = item_rhs;
8103 return die_lhs->offset == die_rhs->offset;
8106 /* Read a whole compilation unit into a linked list of dies. */
8108 static struct die_info *
8109 read_comp_unit (gdb_byte *info_ptr, struct dwarf2_cu *cu)
8111 struct die_reader_specs reader_specs;
8112 int read_abbrevs = 0;
8113 struct cleanup *back_to = NULL;
8114 struct die_info *die;
8116 if (cu->dwarf2_abbrevs == NULL)
8118 dwarf2_read_abbrevs (cu->objfile->obfd, cu);
8119 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
8123 gdb_assert (cu->die_hash == NULL);
8125 = htab_create_alloc_ex (cu->header.length / 12,
8129 &cu->comp_unit_obstack,
8130 hashtab_obstack_allocate,
8131 dummy_obstack_deallocate);
8133 init_cu_die_reader (&reader_specs, cu);
8135 die = read_die_and_children (&reader_specs, info_ptr, &info_ptr, NULL);
8138 do_cleanups (back_to);
8143 /* Main entry point for reading a DIE and all children.
8144 Read the DIE and dump it if requested. */
8146 static struct die_info *
8147 read_die_and_children (const struct die_reader_specs *reader,
8149 gdb_byte **new_info_ptr,
8150 struct die_info *parent)
8152 struct die_info *result = read_die_and_children_1 (reader, info_ptr,
8153 new_info_ptr, parent);
8155 if (dwarf2_die_debug)
8157 fprintf_unfiltered (gdb_stdlog,
8158 "\nRead die from %s of %s:\n",
8159 reader->buffer == dwarf2_per_objfile->info.buffer
8161 : reader->buffer == dwarf2_per_objfile->types.buffer
8163 : "unknown section",
8164 reader->abfd->filename);
8165 dump_die (result, dwarf2_die_debug);
8171 /* Read a single die and all its descendents. Set the die's sibling
8172 field to NULL; set other fields in the die correctly, and set all
8173 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
8174 location of the info_ptr after reading all of those dies. PARENT
8175 is the parent of the die in question. */
8177 static struct die_info *
8178 read_die_and_children_1 (const struct die_reader_specs *reader,
8180 gdb_byte **new_info_ptr,
8181 struct die_info *parent)
8183 struct die_info *die;
8187 cur_ptr = read_full_die (reader, &die, info_ptr, &has_children);
8190 *new_info_ptr = cur_ptr;
8193 store_in_ref_table (die, reader->cu);
8196 die->child = read_die_and_siblings (reader, cur_ptr, new_info_ptr, die);
8200 *new_info_ptr = cur_ptr;
8203 die->sibling = NULL;
8204 die->parent = parent;
8208 /* Read a die, all of its descendents, and all of its siblings; set
8209 all of the fields of all of the dies correctly. Arguments are as
8210 in read_die_and_children. */
8212 static struct die_info *
8213 read_die_and_siblings (const struct die_reader_specs *reader,
8215 gdb_byte **new_info_ptr,
8216 struct die_info *parent)
8218 struct die_info *first_die, *last_sibling;
8222 first_die = last_sibling = NULL;
8226 struct die_info *die
8227 = read_die_and_children_1 (reader, cur_ptr, &cur_ptr, parent);
8231 *new_info_ptr = cur_ptr;
8238 last_sibling->sibling = die;
8244 /* Read the die from the .debug_info section buffer. Set DIEP to
8245 point to a newly allocated die with its information, except for its
8246 child, sibling, and parent fields. Set HAS_CHILDREN to tell
8247 whether the die has children or not. */
8250 read_full_die (const struct die_reader_specs *reader,
8251 struct die_info **diep, gdb_byte *info_ptr,
8254 unsigned int abbrev_number, bytes_read, i, offset;
8255 struct abbrev_info *abbrev;
8256 struct die_info *die;
8257 struct dwarf2_cu *cu = reader->cu;
8258 bfd *abfd = reader->abfd;
8260 offset = info_ptr - reader->buffer;
8261 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
8262 info_ptr += bytes_read;
8270 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
8272 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
8274 bfd_get_filename (abfd));
8276 die = dwarf_alloc_die (cu, abbrev->num_attrs);
8277 die->offset = offset;
8278 die->tag = abbrev->tag;
8279 die->abbrev = abbrev_number;
8281 die->num_attrs = abbrev->num_attrs;
8283 for (i = 0; i < abbrev->num_attrs; ++i)
8284 info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
8285 abfd, info_ptr, cu);
8288 *has_children = abbrev->has_children;
8292 /* In DWARF version 2, the description of the debugging information is
8293 stored in a separate .debug_abbrev section. Before we read any
8294 dies from a section we read in all abbreviations and install them
8295 in a hash table. This function also sets flags in CU describing
8296 the data found in the abbrev table. */
8299 dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu)
8301 struct comp_unit_head *cu_header = &cu->header;
8302 gdb_byte *abbrev_ptr;
8303 struct abbrev_info *cur_abbrev;
8304 unsigned int abbrev_number, bytes_read, abbrev_name;
8305 unsigned int abbrev_form, hash_number;
8306 struct attr_abbrev *cur_attrs;
8307 unsigned int allocated_attrs;
8309 /* Initialize dwarf2 abbrevs */
8310 obstack_init (&cu->abbrev_obstack);
8311 cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack,
8313 * sizeof (struct abbrev_info *)));
8314 memset (cu->dwarf2_abbrevs, 0,
8315 ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
8317 dwarf2_read_section (dwarf2_per_objfile->objfile,
8318 &dwarf2_per_objfile->abbrev);
8319 abbrev_ptr = dwarf2_per_objfile->abbrev.buffer + cu_header->abbrev_offset;
8320 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8321 abbrev_ptr += bytes_read;
8323 allocated_attrs = ATTR_ALLOC_CHUNK;
8324 cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
8326 /* loop until we reach an abbrev number of 0 */
8327 while (abbrev_number)
8329 cur_abbrev = dwarf_alloc_abbrev (cu);
8331 /* read in abbrev header */
8332 cur_abbrev->number = abbrev_number;
8333 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8334 abbrev_ptr += bytes_read;
8335 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
8338 if (cur_abbrev->tag == DW_TAG_namespace)
8339 cu->has_namespace_info = 1;
8341 /* now read in declarations */
8342 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8343 abbrev_ptr += bytes_read;
8344 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8345 abbrev_ptr += bytes_read;
8348 if (cur_abbrev->num_attrs == allocated_attrs)
8350 allocated_attrs += ATTR_ALLOC_CHUNK;
8352 = xrealloc (cur_attrs, (allocated_attrs
8353 * sizeof (struct attr_abbrev)));
8356 /* Record whether this compilation unit might have
8357 inter-compilation-unit references. If we don't know what form
8358 this attribute will have, then it might potentially be a
8359 DW_FORM_ref_addr, so we conservatively expect inter-CU
8362 if (abbrev_form == DW_FORM_ref_addr
8363 || abbrev_form == DW_FORM_indirect)
8364 cu->has_form_ref_addr = 1;
8366 cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
8367 cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
8368 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8369 abbrev_ptr += bytes_read;
8370 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8371 abbrev_ptr += bytes_read;
8374 cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack,
8375 (cur_abbrev->num_attrs
8376 * sizeof (struct attr_abbrev)));
8377 memcpy (cur_abbrev->attrs, cur_attrs,
8378 cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
8380 hash_number = abbrev_number % ABBREV_HASH_SIZE;
8381 cur_abbrev->next = cu->dwarf2_abbrevs[hash_number];
8382 cu->dwarf2_abbrevs[hash_number] = cur_abbrev;
8384 /* Get next abbreviation.
8385 Under Irix6 the abbreviations for a compilation unit are not
8386 always properly terminated with an abbrev number of 0.
8387 Exit loop if we encounter an abbreviation which we have
8388 already read (which means we are about to read the abbreviations
8389 for the next compile unit) or if the end of the abbreviation
8390 table is reached. */
8391 if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev.buffer)
8392 >= dwarf2_per_objfile->abbrev.size)
8394 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
8395 abbrev_ptr += bytes_read;
8396 if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL)
8403 /* Release the memory used by the abbrev table for a compilation unit. */
8406 dwarf2_free_abbrev_table (void *ptr_to_cu)
8408 struct dwarf2_cu *cu = ptr_to_cu;
8410 obstack_free (&cu->abbrev_obstack, NULL);
8411 cu->dwarf2_abbrevs = NULL;
8414 /* Lookup an abbrev_info structure in the abbrev hash table. */
8416 static struct abbrev_info *
8417 dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu)
8419 unsigned int hash_number;
8420 struct abbrev_info *abbrev;
8422 hash_number = number % ABBREV_HASH_SIZE;
8423 abbrev = cu->dwarf2_abbrevs[hash_number];
8427 if (abbrev->number == number)
8430 abbrev = abbrev->next;
8435 /* Returns nonzero if TAG represents a type that we might generate a partial
8439 is_type_tag_for_partial (int tag)
8444 /* Some types that would be reasonable to generate partial symbols for,
8445 that we don't at present. */
8446 case DW_TAG_array_type:
8447 case DW_TAG_file_type:
8448 case DW_TAG_ptr_to_member_type:
8449 case DW_TAG_set_type:
8450 case DW_TAG_string_type:
8451 case DW_TAG_subroutine_type:
8453 case DW_TAG_base_type:
8454 case DW_TAG_class_type:
8455 case DW_TAG_interface_type:
8456 case DW_TAG_enumeration_type:
8457 case DW_TAG_structure_type:
8458 case DW_TAG_subrange_type:
8459 case DW_TAG_typedef:
8460 case DW_TAG_union_type:
8467 /* Load all DIEs that are interesting for partial symbols into memory. */
8469 static struct partial_die_info *
8470 load_partial_dies (bfd *abfd, gdb_byte *buffer, gdb_byte *info_ptr,
8471 int building_psymtab, struct dwarf2_cu *cu)
8473 struct partial_die_info *part_die;
8474 struct partial_die_info *parent_die, *last_die, *first_die = NULL;
8475 struct abbrev_info *abbrev;
8476 unsigned int bytes_read;
8477 unsigned int load_all = 0;
8479 int nesting_level = 1;
8484 if (cu->per_cu && cu->per_cu->load_all_dies)
8488 = htab_create_alloc_ex (cu->header.length / 12,
8492 &cu->comp_unit_obstack,
8493 hashtab_obstack_allocate,
8494 dummy_obstack_deallocate);
8496 part_die = obstack_alloc (&cu->comp_unit_obstack,
8497 sizeof (struct partial_die_info));
8501 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
8503 /* A NULL abbrev means the end of a series of children. */
8506 if (--nesting_level == 0)
8508 /* PART_DIE was probably the last thing allocated on the
8509 comp_unit_obstack, so we could call obstack_free
8510 here. We don't do that because the waste is small,
8511 and will be cleaned up when we're done with this
8512 compilation unit. This way, we're also more robust
8513 against other users of the comp_unit_obstack. */
8516 info_ptr += bytes_read;
8517 last_die = parent_die;
8518 parent_die = parent_die->die_parent;
8522 /* Check for template arguments. We never save these; if
8523 they're seen, we just mark the parent, and go on our way. */
8524 if (parent_die != NULL
8525 && cu->language == language_cplus
8526 && (abbrev->tag == DW_TAG_template_type_param
8527 || abbrev->tag == DW_TAG_template_value_param))
8529 parent_die->has_template_arguments = 1;
8533 /* We don't need a partial DIE for the template argument. */
8534 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev,
8540 /* We only recurse into subprograms looking for template arguments.
8541 Skip their other children. */
8543 && cu->language == language_cplus
8544 && parent_die != NULL
8545 && parent_die->tag == DW_TAG_subprogram)
8547 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
8551 /* Check whether this DIE is interesting enough to save. Normally
8552 we would not be interested in members here, but there may be
8553 later variables referencing them via DW_AT_specification (for
8556 && !is_type_tag_for_partial (abbrev->tag)
8557 && abbrev->tag != DW_TAG_enumerator
8558 && abbrev->tag != DW_TAG_subprogram
8559 && abbrev->tag != DW_TAG_lexical_block
8560 && abbrev->tag != DW_TAG_variable
8561 && abbrev->tag != DW_TAG_namespace
8562 && abbrev->tag != DW_TAG_module
8563 && abbrev->tag != DW_TAG_member)
8565 /* Otherwise we skip to the next sibling, if any. */
8566 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
8570 info_ptr = read_partial_die (part_die, abbrev, bytes_read, abfd,
8571 buffer, info_ptr, cu);
8573 /* This two-pass algorithm for processing partial symbols has a
8574 high cost in cache pressure. Thus, handle some simple cases
8575 here which cover the majority of C partial symbols. DIEs
8576 which neither have specification tags in them, nor could have
8577 specification tags elsewhere pointing at them, can simply be
8578 processed and discarded.
8580 This segment is also optional; scan_partial_symbols and
8581 add_partial_symbol will handle these DIEs if we chain
8582 them in normally. When compilers which do not emit large
8583 quantities of duplicate debug information are more common,
8584 this code can probably be removed. */
8586 /* Any complete simple types at the top level (pretty much all
8587 of them, for a language without namespaces), can be processed
8589 if (parent_die == NULL
8590 && part_die->has_specification == 0
8591 && part_die->is_declaration == 0
8592 && (part_die->tag == DW_TAG_typedef
8593 || part_die->tag == DW_TAG_base_type
8594 || part_die->tag == DW_TAG_subrange_type))
8596 if (building_psymtab && part_die->name != NULL)
8597 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
8598 VAR_DOMAIN, LOC_TYPEDEF,
8599 &cu->objfile->static_psymbols,
8600 0, (CORE_ADDR) 0, cu->language, cu->objfile);
8601 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
8605 /* If we're at the second level, and we're an enumerator, and
8606 our parent has no specification (meaning possibly lives in a
8607 namespace elsewhere), then we can add the partial symbol now
8608 instead of queueing it. */
8609 if (part_die->tag == DW_TAG_enumerator
8610 && parent_die != NULL
8611 && parent_die->die_parent == NULL
8612 && parent_die->tag == DW_TAG_enumeration_type
8613 && parent_die->has_specification == 0)
8615 if (part_die->name == NULL)
8616 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
8617 else if (building_psymtab)
8618 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
8619 VAR_DOMAIN, LOC_CONST,
8620 (cu->language == language_cplus
8621 || cu->language == language_java)
8622 ? &cu->objfile->global_psymbols
8623 : &cu->objfile->static_psymbols,
8624 0, (CORE_ADDR) 0, cu->language, cu->objfile);
8626 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
8630 /* We'll save this DIE so link it in. */
8631 part_die->die_parent = parent_die;
8632 part_die->die_sibling = NULL;
8633 part_die->die_child = NULL;
8635 if (last_die && last_die == parent_die)
8636 last_die->die_child = part_die;
8638 last_die->die_sibling = part_die;
8640 last_die = part_die;
8642 if (first_die == NULL)
8643 first_die = part_die;
8645 /* Maybe add the DIE to the hash table. Not all DIEs that we
8646 find interesting need to be in the hash table, because we
8647 also have the parent/sibling/child chains; only those that we
8648 might refer to by offset later during partial symbol reading.
8650 For now this means things that might have be the target of a
8651 DW_AT_specification, DW_AT_abstract_origin, or
8652 DW_AT_extension. DW_AT_extension will refer only to
8653 namespaces; DW_AT_abstract_origin refers to functions (and
8654 many things under the function DIE, but we do not recurse
8655 into function DIEs during partial symbol reading) and
8656 possibly variables as well; DW_AT_specification refers to
8657 declarations. Declarations ought to have the DW_AT_declaration
8658 flag. It happens that GCC forgets to put it in sometimes, but
8659 only for functions, not for types.
8661 Adding more things than necessary to the hash table is harmless
8662 except for the performance cost. Adding too few will result in
8663 wasted time in find_partial_die, when we reread the compilation
8664 unit with load_all_dies set. */
8667 || abbrev->tag == DW_TAG_subprogram
8668 || abbrev->tag == DW_TAG_variable
8669 || abbrev->tag == DW_TAG_namespace
8670 || part_die->is_declaration)
8674 slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
8675 part_die->offset, INSERT);
8679 part_die = obstack_alloc (&cu->comp_unit_obstack,
8680 sizeof (struct partial_die_info));
8682 /* For some DIEs we want to follow their children (if any). For C
8683 we have no reason to follow the children of structures; for other
8684 languages we have to, so that we can get at method physnames
8685 to infer fully qualified class names, for DW_AT_specification,
8686 and for C++ template arguments. For C++, we also look one level
8687 inside functions to find template arguments (if the name of the
8688 function does not already contain the template arguments).
8690 For Ada, we need to scan the children of subprograms and lexical
8691 blocks as well because Ada allows the definition of nested
8692 entities that could be interesting for the debugger, such as
8693 nested subprograms for instance. */
8694 if (last_die->has_children
8696 || last_die->tag == DW_TAG_namespace
8697 || last_die->tag == DW_TAG_module
8698 || last_die->tag == DW_TAG_enumeration_type
8699 || (cu->language == language_cplus
8700 && last_die->tag == DW_TAG_subprogram
8701 && (last_die->name == NULL
8702 || strchr (last_die->name, '<') == NULL))
8703 || (cu->language != language_c
8704 && (last_die->tag == DW_TAG_class_type
8705 || last_die->tag == DW_TAG_interface_type
8706 || last_die->tag == DW_TAG_structure_type
8707 || last_die->tag == DW_TAG_union_type))
8708 || (cu->language == language_ada
8709 && (last_die->tag == DW_TAG_subprogram
8710 || last_die->tag == DW_TAG_lexical_block))))
8713 parent_die = last_die;
8717 /* Otherwise we skip to the next sibling, if any. */
8718 info_ptr = locate_pdi_sibling (last_die, buffer, info_ptr, abfd, cu);
8720 /* Back to the top, do it again. */
8724 /* Read a minimal amount of information into the minimal die structure. */
8727 read_partial_die (struct partial_die_info *part_die,
8728 struct abbrev_info *abbrev,
8729 unsigned int abbrev_len, bfd *abfd,
8730 gdb_byte *buffer, gdb_byte *info_ptr,
8731 struct dwarf2_cu *cu)
8734 struct attribute attr;
8735 int has_low_pc_attr = 0;
8736 int has_high_pc_attr = 0;
8738 memset (part_die, 0, sizeof (struct partial_die_info));
8740 part_die->offset = info_ptr - buffer;
8742 info_ptr += abbrev_len;
8747 part_die->tag = abbrev->tag;
8748 part_die->has_children = abbrev->has_children;
8750 for (i = 0; i < abbrev->num_attrs; ++i)
8752 info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu);
8754 /* Store the data if it is of an attribute we want to keep in a
8755 partial symbol table. */
8759 switch (part_die->tag)
8761 case DW_TAG_compile_unit:
8762 case DW_TAG_type_unit:
8763 /* Compilation units have a DW_AT_name that is a filename, not
8764 a source language identifier. */
8765 case DW_TAG_enumeration_type:
8766 case DW_TAG_enumerator:
8767 /* These tags always have simple identifiers already; no need
8768 to canonicalize them. */
8769 part_die->name = DW_STRING (&attr);
8773 = dwarf2_canonicalize_name (DW_STRING (&attr), cu,
8774 &cu->objfile->objfile_obstack);
8778 case DW_AT_linkage_name:
8779 case DW_AT_MIPS_linkage_name:
8780 /* Note that both forms of linkage name might appear. We
8781 assume they will be the same, and we only store the last
8783 if (cu->language == language_ada)
8784 part_die->name = DW_STRING (&attr);
8787 has_low_pc_attr = 1;
8788 part_die->lowpc = DW_ADDR (&attr);
8791 has_high_pc_attr = 1;
8792 part_die->highpc = DW_ADDR (&attr);
8794 case DW_AT_location:
8795 /* Support the .debug_loc offsets */
8796 if (attr_form_is_block (&attr))
8798 part_die->locdesc = DW_BLOCK (&attr);
8800 else if (attr_form_is_section_offset (&attr))
8802 dwarf2_complex_location_expr_complaint ();
8806 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
8807 "partial symbol information");
8810 case DW_AT_external:
8811 part_die->is_external = DW_UNSND (&attr);
8813 case DW_AT_declaration:
8814 part_die->is_declaration = DW_UNSND (&attr);
8817 part_die->has_type = 1;
8819 case DW_AT_abstract_origin:
8820 case DW_AT_specification:
8821 case DW_AT_extension:
8822 part_die->has_specification = 1;
8823 part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
8826 /* Ignore absolute siblings, they might point outside of
8827 the current compile unit. */
8828 if (attr.form == DW_FORM_ref_addr)
8829 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
8831 part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr);
8833 case DW_AT_byte_size:
8834 part_die->has_byte_size = 1;
8836 case DW_AT_calling_convention:
8837 /* DWARF doesn't provide a way to identify a program's source-level
8838 entry point. DW_AT_calling_convention attributes are only meant
8839 to describe functions' calling conventions.
8841 However, because it's a necessary piece of information in
8842 Fortran, and because DW_CC_program is the only piece of debugging
8843 information whose definition refers to a 'main program' at all,
8844 several compilers have begun marking Fortran main programs with
8845 DW_CC_program --- even when those functions use the standard
8846 calling conventions.
8848 So until DWARF specifies a way to provide this information and
8849 compilers pick up the new representation, we'll support this
8851 if (DW_UNSND (&attr) == DW_CC_program
8852 && cu->language == language_fortran)
8853 set_main_name (part_die->name);
8860 /* When using the GNU linker, .gnu.linkonce. sections are used to
8861 eliminate duplicate copies of functions and vtables and such.
8862 The linker will arbitrarily choose one and discard the others.
8863 The AT_*_pc values for such functions refer to local labels in
8864 these sections. If the section from that file was discarded, the
8865 labels are not in the output, so the relocs get a value of 0.
8866 If this is a discarded function, mark the pc bounds as invalid,
8867 so that GDB will ignore it. */
8868 if (has_low_pc_attr && has_high_pc_attr
8869 && part_die->lowpc < part_die->highpc
8870 && (part_die->lowpc != 0
8871 || dwarf2_per_objfile->has_section_at_zero))
8872 part_die->has_pc_info = 1;
8877 /* Find a cached partial DIE at OFFSET in CU. */
8879 static struct partial_die_info *
8880 find_partial_die_in_comp_unit (unsigned int offset, struct dwarf2_cu *cu)
8882 struct partial_die_info *lookup_die = NULL;
8883 struct partial_die_info part_die;
8885 part_die.offset = offset;
8886 lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset);
8891 /* Find a partial DIE at OFFSET, which may or may not be in CU,
8892 except in the case of .debug_types DIEs which do not reference
8893 outside their CU (they do however referencing other types via
8896 static struct partial_die_info *
8897 find_partial_die (unsigned int offset, struct dwarf2_cu *cu)
8899 struct dwarf2_per_cu_data *per_cu = NULL;
8900 struct partial_die_info *pd = NULL;
8902 if (cu->per_cu->from_debug_types)
8904 pd = find_partial_die_in_comp_unit (offset, cu);
8910 if (offset_in_cu_p (&cu->header, offset))
8912 pd = find_partial_die_in_comp_unit (offset, cu);
8917 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
8919 if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL)
8920 load_partial_comp_unit (per_cu, cu->objfile);
8922 per_cu->cu->last_used = 0;
8923 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
8925 if (pd == NULL && per_cu->load_all_dies == 0)
8927 struct cleanup *back_to;
8928 struct partial_die_info comp_unit_die;
8929 struct abbrev_info *abbrev;
8930 unsigned int bytes_read;
8933 per_cu->load_all_dies = 1;
8935 /* Re-read the DIEs. */
8936 back_to = make_cleanup (null_cleanup, 0);
8937 if (per_cu->cu->dwarf2_abbrevs == NULL)
8939 dwarf2_read_abbrevs (per_cu->cu->objfile->obfd, per_cu->cu);
8940 make_cleanup (dwarf2_free_abbrev_table, per_cu->cu);
8942 info_ptr = (dwarf2_per_objfile->info.buffer
8943 + per_cu->cu->header.offset
8944 + per_cu->cu->header.first_die_offset);
8945 abbrev = peek_die_abbrev (info_ptr, &bytes_read, per_cu->cu);
8946 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
8947 per_cu->cu->objfile->obfd,
8948 dwarf2_per_objfile->info.buffer, info_ptr,
8950 if (comp_unit_die.has_children)
8951 load_partial_dies (per_cu->cu->objfile->obfd,
8952 dwarf2_per_objfile->info.buffer, info_ptr,
8954 do_cleanups (back_to);
8956 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
8962 internal_error (__FILE__, __LINE__,
8963 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
8964 offset, bfd_get_filename (cu->objfile->obfd));
8968 /* Adjust PART_DIE before generating a symbol for it. This function
8969 may set the is_external flag or change the DIE's name. */
8972 fixup_partial_die (struct partial_die_info *part_die,
8973 struct dwarf2_cu *cu)
8975 /* If we found a reference attribute and the DIE has no name, try
8976 to find a name in the referred to DIE. */
8978 if (part_die->name == NULL && part_die->has_specification)
8980 struct partial_die_info *spec_die;
8982 spec_die = find_partial_die (part_die->spec_offset, cu);
8984 fixup_partial_die (spec_die, cu);
8988 part_die->name = spec_die->name;
8990 /* Copy DW_AT_external attribute if it is set. */
8991 if (spec_die->is_external)
8992 part_die->is_external = spec_die->is_external;
8996 /* Set default names for some unnamed DIEs. */
8997 if (part_die->name == NULL && (part_die->tag == DW_TAG_structure_type
8998 || part_die->tag == DW_TAG_class_type))
8999 part_die->name = "(anonymous class)";
9001 if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
9002 part_die->name = "(anonymous namespace)";
9004 if (part_die->tag == DW_TAG_structure_type
9005 || part_die->tag == DW_TAG_class_type
9006 || part_die->tag == DW_TAG_union_type)
9007 guess_structure_name (part_die, cu);
9010 /* Read an attribute value described by an attribute form. */
9013 read_attribute_value (struct attribute *attr, unsigned form,
9014 bfd *abfd, gdb_byte *info_ptr,
9015 struct dwarf2_cu *cu)
9017 struct comp_unit_head *cu_header = &cu->header;
9018 unsigned int bytes_read;
9019 struct dwarf_block *blk;
9024 case DW_FORM_ref_addr:
9025 if (cu->header.version == 2)
9026 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
9028 DW_ADDR (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
9029 info_ptr += bytes_read;
9032 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
9033 info_ptr += bytes_read;
9035 case DW_FORM_block2:
9036 blk = dwarf_alloc_block (cu);
9037 blk->size = read_2_bytes (abfd, info_ptr);
9039 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
9040 info_ptr += blk->size;
9041 DW_BLOCK (attr) = blk;
9043 case DW_FORM_block4:
9044 blk = dwarf_alloc_block (cu);
9045 blk->size = read_4_bytes (abfd, info_ptr);
9047 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
9048 info_ptr += blk->size;
9049 DW_BLOCK (attr) = blk;
9052 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
9056 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
9060 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
9063 case DW_FORM_sec_offset:
9064 DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
9065 info_ptr += bytes_read;
9067 case DW_FORM_string:
9068 DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read);
9069 DW_STRING_IS_CANONICAL (attr) = 0;
9070 info_ptr += bytes_read;
9073 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
9075 DW_STRING_IS_CANONICAL (attr) = 0;
9076 info_ptr += bytes_read;
9078 case DW_FORM_exprloc:
9080 blk = dwarf_alloc_block (cu);
9081 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
9082 info_ptr += bytes_read;
9083 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
9084 info_ptr += blk->size;
9085 DW_BLOCK (attr) = blk;
9087 case DW_FORM_block1:
9088 blk = dwarf_alloc_block (cu);
9089 blk->size = read_1_byte (abfd, info_ptr);
9091 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
9092 info_ptr += blk->size;
9093 DW_BLOCK (attr) = blk;
9096 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
9100 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
9103 case DW_FORM_flag_present:
9104 DW_UNSND (attr) = 1;
9107 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
9108 info_ptr += bytes_read;
9111 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
9112 info_ptr += bytes_read;
9115 DW_ADDR (attr) = cu->header.offset + read_1_byte (abfd, info_ptr);
9119 DW_ADDR (attr) = cu->header.offset + read_2_bytes (abfd, info_ptr);
9123 DW_ADDR (attr) = cu->header.offset + read_4_bytes (abfd, info_ptr);
9127 DW_ADDR (attr) = cu->header.offset + read_8_bytes (abfd, info_ptr);
9131 /* Convert the signature to something we can record in DW_UNSND
9133 NOTE: This is NULL if the type wasn't found. */
9134 DW_SIGNATURED_TYPE (attr) =
9135 lookup_signatured_type (cu->objfile, read_8_bytes (abfd, info_ptr));
9138 case DW_FORM_ref_udata:
9139 DW_ADDR (attr) = (cu->header.offset
9140 + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
9141 info_ptr += bytes_read;
9143 case DW_FORM_indirect:
9144 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
9145 info_ptr += bytes_read;
9146 info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu);
9149 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
9150 dwarf_form_name (form),
9151 bfd_get_filename (abfd));
9154 /* We have seen instances where the compiler tried to emit a byte
9155 size attribute of -1 which ended up being encoded as an unsigned
9156 0xffffffff. Although 0xffffffff is technically a valid size value,
9157 an object of this size seems pretty unlikely so we can relatively
9158 safely treat these cases as if the size attribute was invalid and
9159 treat them as zero by default. */
9160 if (attr->name == DW_AT_byte_size
9161 && form == DW_FORM_data4
9162 && DW_UNSND (attr) >= 0xffffffff)
9165 (&symfile_complaints,
9166 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
9167 hex_string (DW_UNSND (attr)));
9168 DW_UNSND (attr) = 0;
9174 /* Read an attribute described by an abbreviated attribute. */
9177 read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
9178 bfd *abfd, gdb_byte *info_ptr, struct dwarf2_cu *cu)
9180 attr->name = abbrev->name;
9181 return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu);
9184 /* read dwarf information from a buffer */
9187 read_1_byte (bfd *abfd, gdb_byte *buf)
9189 return bfd_get_8 (abfd, buf);
9193 read_1_signed_byte (bfd *abfd, gdb_byte *buf)
9195 return bfd_get_signed_8 (abfd, buf);
9199 read_2_bytes (bfd *abfd, gdb_byte *buf)
9201 return bfd_get_16 (abfd, buf);
9205 read_2_signed_bytes (bfd *abfd, gdb_byte *buf)
9207 return bfd_get_signed_16 (abfd, buf);
9211 read_4_bytes (bfd *abfd, gdb_byte *buf)
9213 return bfd_get_32 (abfd, buf);
9217 read_4_signed_bytes (bfd *abfd, gdb_byte *buf)
9219 return bfd_get_signed_32 (abfd, buf);
9223 read_8_bytes (bfd *abfd, gdb_byte *buf)
9225 return bfd_get_64 (abfd, buf);
9229 read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
9230 unsigned int *bytes_read)
9232 struct comp_unit_head *cu_header = &cu->header;
9233 CORE_ADDR retval = 0;
9235 if (cu_header->signed_addr_p)
9237 switch (cu_header->addr_size)
9240 retval = bfd_get_signed_16 (abfd, buf);
9243 retval = bfd_get_signed_32 (abfd, buf);
9246 retval = bfd_get_signed_64 (abfd, buf);
9249 internal_error (__FILE__, __LINE__,
9250 _("read_address: bad switch, signed [in module %s]"),
9251 bfd_get_filename (abfd));
9256 switch (cu_header->addr_size)
9259 retval = bfd_get_16 (abfd, buf);
9262 retval = bfd_get_32 (abfd, buf);
9265 retval = bfd_get_64 (abfd, buf);
9268 internal_error (__FILE__, __LINE__,
9269 _("read_address: bad switch, unsigned [in module %s]"),
9270 bfd_get_filename (abfd));
9274 *bytes_read = cu_header->addr_size;
9278 /* Read the initial length from a section. The (draft) DWARF 3
9279 specification allows the initial length to take up either 4 bytes
9280 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
9281 bytes describe the length and all offsets will be 8 bytes in length
9284 An older, non-standard 64-bit format is also handled by this
9285 function. The older format in question stores the initial length
9286 as an 8-byte quantity without an escape value. Lengths greater
9287 than 2^32 aren't very common which means that the initial 4 bytes
9288 is almost always zero. Since a length value of zero doesn't make
9289 sense for the 32-bit format, this initial zero can be considered to
9290 be an escape value which indicates the presence of the older 64-bit
9291 format. As written, the code can't detect (old format) lengths
9292 greater than 4GB. If it becomes necessary to handle lengths
9293 somewhat larger than 4GB, we could allow other small values (such
9294 as the non-sensical values of 1, 2, and 3) to also be used as
9295 escape values indicating the presence of the old format.
9297 The value returned via bytes_read should be used to increment the
9298 relevant pointer after calling read_initial_length().
9300 [ Note: read_initial_length() and read_offset() are based on the
9301 document entitled "DWARF Debugging Information Format", revision
9302 3, draft 8, dated November 19, 2001. This document was obtained
9305 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
9307 This document is only a draft and is subject to change. (So beware.)
9309 Details regarding the older, non-standard 64-bit format were
9310 determined empirically by examining 64-bit ELF files produced by
9311 the SGI toolchain on an IRIX 6.5 machine.
9313 - Kevin, July 16, 2002
9317 read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read)
9319 LONGEST length = bfd_get_32 (abfd, buf);
9321 if (length == 0xffffffff)
9323 length = bfd_get_64 (abfd, buf + 4);
9326 else if (length == 0)
9328 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
9329 length = bfd_get_64 (abfd, buf);
9340 /* Cover function for read_initial_length.
9341 Returns the length of the object at BUF, and stores the size of the
9342 initial length in *BYTES_READ and stores the size that offsets will be in
9344 If the initial length size is not equivalent to that specified in
9345 CU_HEADER then issue a complaint.
9346 This is useful when reading non-comp-unit headers. */
9349 read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf,
9350 const struct comp_unit_head *cu_header,
9351 unsigned int *bytes_read,
9352 unsigned int *offset_size)
9354 LONGEST length = read_initial_length (abfd, buf, bytes_read);
9356 gdb_assert (cu_header->initial_length_size == 4
9357 || cu_header->initial_length_size == 8
9358 || cu_header->initial_length_size == 12);
9360 if (cu_header->initial_length_size != *bytes_read)
9361 complaint (&symfile_complaints,
9362 _("intermixed 32-bit and 64-bit DWARF sections"));
9364 *offset_size = (*bytes_read == 4) ? 4 : 8;
9368 /* Read an offset from the data stream. The size of the offset is
9369 given by cu_header->offset_size. */
9372 read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
9373 unsigned int *bytes_read)
9375 LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size);
9377 *bytes_read = cu_header->offset_size;
9381 /* Read an offset from the data stream. */
9384 read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size)
9388 switch (offset_size)
9391 retval = bfd_get_32 (abfd, buf);
9394 retval = bfd_get_64 (abfd, buf);
9397 internal_error (__FILE__, __LINE__,
9398 _("read_offset_1: bad switch [in module %s]"),
9399 bfd_get_filename (abfd));
9406 read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
9408 /* If the size of a host char is 8 bits, we can return a pointer
9409 to the buffer, otherwise we have to copy the data to a buffer
9410 allocated on the temporary obstack. */
9411 gdb_assert (HOST_CHAR_BIT == 8);
9416 read_direct_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
9418 /* If the size of a host char is 8 bits, we can return a pointer
9419 to the string, otherwise we have to copy the string to a buffer
9420 allocated on the temporary obstack. */
9421 gdb_assert (HOST_CHAR_BIT == 8);
9424 *bytes_read_ptr = 1;
9427 *bytes_read_ptr = strlen ((char *) buf) + 1;
9428 return (char *) buf;
9432 read_indirect_string (bfd *abfd, gdb_byte *buf,
9433 const struct comp_unit_head *cu_header,
9434 unsigned int *bytes_read_ptr)
9436 LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr);
9438 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str);
9439 if (dwarf2_per_objfile->str.buffer == NULL)
9441 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
9442 bfd_get_filename (abfd));
9445 if (str_offset >= dwarf2_per_objfile->str.size)
9447 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
9448 bfd_get_filename (abfd));
9451 gdb_assert (HOST_CHAR_BIT == 8);
9452 if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
9454 return (char *) (dwarf2_per_objfile->str.buffer + str_offset);
9457 static unsigned long
9458 read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
9460 unsigned long result;
9461 unsigned int num_read;
9471 byte = bfd_get_8 (abfd, buf);
9474 result |= ((unsigned long)(byte & 127) << shift);
9475 if ((byte & 128) == 0)
9481 *bytes_read_ptr = num_read;
9486 read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
9489 int i, shift, num_read;
9498 byte = bfd_get_8 (abfd, buf);
9501 result |= ((long)(byte & 127) << shift);
9503 if ((byte & 128) == 0)
9508 if ((shift < 8 * sizeof (result)) && (byte & 0x40))
9509 result |= -(((long)1) << shift);
9510 *bytes_read_ptr = num_read;
9514 /* Return a pointer to just past the end of an LEB128 number in BUF. */
9517 skip_leb128 (bfd *abfd, gdb_byte *buf)
9523 byte = bfd_get_8 (abfd, buf);
9525 if ((byte & 128) == 0)
9531 set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
9538 cu->language = language_c;
9540 case DW_LANG_C_plus_plus:
9541 cu->language = language_cplus;
9544 cu->language = language_d;
9546 case DW_LANG_Fortran77:
9547 case DW_LANG_Fortran90:
9548 case DW_LANG_Fortran95:
9549 cu->language = language_fortran;
9551 case DW_LANG_Mips_Assembler:
9552 cu->language = language_asm;
9555 cu->language = language_java;
9559 cu->language = language_ada;
9561 case DW_LANG_Modula2:
9562 cu->language = language_m2;
9564 case DW_LANG_Pascal83:
9565 cu->language = language_pascal;
9568 cu->language = language_objc;
9570 case DW_LANG_Cobol74:
9571 case DW_LANG_Cobol85:
9573 cu->language = language_minimal;
9576 cu->language_defn = language_def (cu->language);
9579 /* Return the named attribute or NULL if not there. */
9581 static struct attribute *
9582 dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
9585 struct attribute *spec = NULL;
9587 for (i = 0; i < die->num_attrs; ++i)
9589 if (die->attrs[i].name == name)
9590 return &die->attrs[i];
9591 if (die->attrs[i].name == DW_AT_specification
9592 || die->attrs[i].name == DW_AT_abstract_origin)
9593 spec = &die->attrs[i];
9598 die = follow_die_ref (die, spec, &cu);
9599 return dwarf2_attr (die, name, cu);
9605 /* Return the named attribute or NULL if not there,
9606 but do not follow DW_AT_specification, etc.
9607 This is for use in contexts where we're reading .debug_types dies.
9608 Following DW_AT_specification, DW_AT_abstract_origin will take us
9609 back up the chain, and we want to go down. */
9611 static struct attribute *
9612 dwarf2_attr_no_follow (struct die_info *die, unsigned int name,
9613 struct dwarf2_cu *cu)
9617 for (i = 0; i < die->num_attrs; ++i)
9618 if (die->attrs[i].name == name)
9619 return &die->attrs[i];
9624 /* Return non-zero iff the attribute NAME is defined for the given DIE,
9625 and holds a non-zero value. This function should only be used for
9626 DW_FORM_flag or DW_FORM_flag_present attributes. */
9629 dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
9631 struct attribute *attr = dwarf2_attr (die, name, cu);
9633 return (attr && DW_UNSND (attr));
9637 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
9639 /* A DIE is a declaration if it has a DW_AT_declaration attribute
9640 which value is non-zero. However, we have to be careful with
9641 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
9642 (via dwarf2_flag_true_p) follows this attribute. So we may
9643 end up accidently finding a declaration attribute that belongs
9644 to a different DIE referenced by the specification attribute,
9645 even though the given DIE does not have a declaration attribute. */
9646 return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
9647 && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
9650 /* Return the die giving the specification for DIE, if there is
9651 one. *SPEC_CU is the CU containing DIE on input, and the CU
9652 containing the return value on output. If there is no
9653 specification, but there is an abstract origin, that is
9656 static struct die_info *
9657 die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
9659 struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
9662 if (spec_attr == NULL)
9663 spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu);
9665 if (spec_attr == NULL)
9668 return follow_die_ref (die, spec_attr, spec_cu);
9671 /* Free the line_header structure *LH, and any arrays and strings it
9674 free_line_header (struct line_header *lh)
9676 if (lh->standard_opcode_lengths)
9677 xfree (lh->standard_opcode_lengths);
9679 /* Remember that all the lh->file_names[i].name pointers are
9680 pointers into debug_line_buffer, and don't need to be freed. */
9682 xfree (lh->file_names);
9684 /* Similarly for the include directory names. */
9685 if (lh->include_dirs)
9686 xfree (lh->include_dirs);
9692 /* Add an entry to LH's include directory table. */
9694 add_include_dir (struct line_header *lh, char *include_dir)
9696 /* Grow the array if necessary. */
9697 if (lh->include_dirs_size == 0)
9699 lh->include_dirs_size = 1; /* for testing */
9700 lh->include_dirs = xmalloc (lh->include_dirs_size
9701 * sizeof (*lh->include_dirs));
9703 else if (lh->num_include_dirs >= lh->include_dirs_size)
9705 lh->include_dirs_size *= 2;
9706 lh->include_dirs = xrealloc (lh->include_dirs,
9707 (lh->include_dirs_size
9708 * sizeof (*lh->include_dirs)));
9711 lh->include_dirs[lh->num_include_dirs++] = include_dir;
9715 /* Add an entry to LH's file name table. */
9717 add_file_name (struct line_header *lh,
9719 unsigned int dir_index,
9720 unsigned int mod_time,
9721 unsigned int length)
9723 struct file_entry *fe;
9725 /* Grow the array if necessary. */
9726 if (lh->file_names_size == 0)
9728 lh->file_names_size = 1; /* for testing */
9729 lh->file_names = xmalloc (lh->file_names_size
9730 * sizeof (*lh->file_names));
9732 else if (lh->num_file_names >= lh->file_names_size)
9734 lh->file_names_size *= 2;
9735 lh->file_names = xrealloc (lh->file_names,
9736 (lh->file_names_size
9737 * sizeof (*lh->file_names)));
9740 fe = &lh->file_names[lh->num_file_names++];
9742 fe->dir_index = dir_index;
9743 fe->mod_time = mod_time;
9744 fe->length = length;
9750 /* Read the statement program header starting at OFFSET in
9751 .debug_line, according to the endianness of ABFD. Return a pointer
9752 to a struct line_header, allocated using xmalloc.
9754 NOTE: the strings in the include directory and file name tables of
9755 the returned object point into debug_line_buffer, and must not be
9757 static struct line_header *
9758 dwarf_decode_line_header (unsigned int offset, bfd *abfd,
9759 struct dwarf2_cu *cu)
9761 struct cleanup *back_to;
9762 struct line_header *lh;
9764 unsigned int bytes_read, offset_size;
9766 char *cur_dir, *cur_file;
9768 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->line);
9769 if (dwarf2_per_objfile->line.buffer == NULL)
9771 complaint (&symfile_complaints, _("missing .debug_line section"));
9775 /* Make sure that at least there's room for the total_length field.
9776 That could be 12 bytes long, but we're just going to fudge that. */
9777 if (offset + 4 >= dwarf2_per_objfile->line.size)
9779 dwarf2_statement_list_fits_in_line_number_section_complaint ();
9783 lh = xmalloc (sizeof (*lh));
9784 memset (lh, 0, sizeof (*lh));
9785 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
9788 line_ptr = dwarf2_per_objfile->line.buffer + offset;
9790 /* Read in the header. */
9792 read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header,
9793 &bytes_read, &offset_size);
9794 line_ptr += bytes_read;
9795 if (line_ptr + lh->total_length > (dwarf2_per_objfile->line.buffer
9796 + dwarf2_per_objfile->line.size))
9798 dwarf2_statement_list_fits_in_line_number_section_complaint ();
9801 lh->statement_program_end = line_ptr + lh->total_length;
9802 lh->version = read_2_bytes (abfd, line_ptr);
9804 lh->header_length = read_offset_1 (abfd, line_ptr, offset_size);
9805 line_ptr += offset_size;
9806 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
9808 if (lh->version >= 4)
9810 lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr);
9814 lh->maximum_ops_per_instruction = 1;
9816 if (lh->maximum_ops_per_instruction == 0)
9818 lh->maximum_ops_per_instruction = 1;
9819 complaint (&symfile_complaints,
9820 _("invalid maximum_ops_per_instruction in `.debug_line' section"));
9823 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
9825 lh->line_base = read_1_signed_byte (abfd, line_ptr);
9827 lh->line_range = read_1_byte (abfd, line_ptr);
9829 lh->opcode_base = read_1_byte (abfd, line_ptr);
9831 lh->standard_opcode_lengths
9832 = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
9834 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
9835 for (i = 1; i < lh->opcode_base; ++i)
9837 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
9841 /* Read directory table. */
9842 while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL)
9844 line_ptr += bytes_read;
9845 add_include_dir (lh, cur_dir);
9847 line_ptr += bytes_read;
9849 /* Read file name table. */
9850 while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL)
9852 unsigned int dir_index, mod_time, length;
9854 line_ptr += bytes_read;
9855 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
9856 line_ptr += bytes_read;
9857 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
9858 line_ptr += bytes_read;
9859 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
9860 line_ptr += bytes_read;
9862 add_file_name (lh, cur_file, dir_index, mod_time, length);
9864 line_ptr += bytes_read;
9865 lh->statement_program_start = line_ptr;
9867 if (line_ptr > (dwarf2_per_objfile->line.buffer
9868 + dwarf2_per_objfile->line.size))
9869 complaint (&symfile_complaints,
9870 _("line number info header doesn't fit in `.debug_line' section"));
9872 discard_cleanups (back_to);
9876 /* This function exists to work around a bug in certain compilers
9877 (particularly GCC 2.95), in which the first line number marker of a
9878 function does not show up until after the prologue, right before
9879 the second line number marker. This function shifts ADDRESS down
9880 to the beginning of the function if necessary, and is called on
9881 addresses passed to record_line. */
9884 check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu)
9886 struct function_range *fn;
9888 /* Find the function_range containing address. */
9893 cu->cached_fn = cu->first_fn;
9897 if (fn->lowpc <= address && fn->highpc > address)
9903 while (fn && fn != cu->cached_fn)
9904 if (fn->lowpc <= address && fn->highpc > address)
9914 if (address != fn->lowpc)
9915 complaint (&symfile_complaints,
9916 _("misplaced first line number at 0x%lx for '%s'"),
9917 (unsigned long) address, fn->name);
9922 /* Subroutine of dwarf_decode_lines to simplify it.
9923 Return the file name of the psymtab for included file FILE_INDEX
9924 in line header LH of PST.
9925 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
9926 If space for the result is malloc'd, it will be freed by a cleanup.
9927 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
9930 psymtab_include_file_name (const struct line_header *lh, int file_index,
9931 const struct partial_symtab *pst,
9932 const char *comp_dir)
9934 const struct file_entry fe = lh->file_names [file_index];
9935 char *include_name = fe.name;
9936 char *include_name_to_compare = include_name;
9937 char *dir_name = NULL;
9942 dir_name = lh->include_dirs[fe.dir_index - 1];
9944 if (!IS_ABSOLUTE_PATH (include_name)
9945 && (dir_name != NULL || comp_dir != NULL))
9947 /* Avoid creating a duplicate psymtab for PST.
9948 We do this by comparing INCLUDE_NAME and PST_FILENAME.
9949 Before we do the comparison, however, we need to account
9950 for DIR_NAME and COMP_DIR.
9951 First prepend dir_name (if non-NULL). If we still don't
9952 have an absolute path prepend comp_dir (if non-NULL).
9953 However, the directory we record in the include-file's
9954 psymtab does not contain COMP_DIR (to match the
9955 corresponding symtab(s)).
9960 bash$ gcc -g ./hello.c
9961 include_name = "hello.c"
9963 DW_AT_comp_dir = comp_dir = "/tmp"
9964 DW_AT_name = "./hello.c" */
9966 if (dir_name != NULL)
9968 include_name = concat (dir_name, SLASH_STRING,
9969 include_name, (char *)NULL);
9970 include_name_to_compare = include_name;
9971 make_cleanup (xfree, include_name);
9973 if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL)
9975 include_name_to_compare = concat (comp_dir, SLASH_STRING,
9976 include_name, (char *)NULL);
9980 pst_filename = pst->filename;
9981 if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
9983 pst_filename = concat (pst->dirname, SLASH_STRING,
9984 pst_filename, (char *)NULL);
9987 file_is_pst = strcmp (include_name_to_compare, pst_filename) == 0;
9989 if (include_name_to_compare != include_name)
9990 xfree (include_name_to_compare);
9991 if (pst_filename != pst->filename)
9992 xfree (pst_filename);
9996 return include_name;
9999 /* Decode the Line Number Program (LNP) for the given line_header
10000 structure and CU. The actual information extracted and the type
10001 of structures created from the LNP depends on the value of PST.
10003 1. If PST is NULL, then this procedure uses the data from the program
10004 to create all necessary symbol tables, and their linetables.
10006 2. If PST is not NULL, this procedure reads the program to determine
10007 the list of files included by the unit represented by PST, and
10008 builds all the associated partial symbol tables.
10010 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
10011 It is used for relative paths in the line table.
10012 NOTE: When processing partial symtabs (pst != NULL),
10013 comp_dir == pst->dirname.
10015 NOTE: It is important that psymtabs have the same file name (via strcmp)
10016 as the corresponding symtab. Since COMP_DIR is not used in the name of the
10017 symtab we don't use it in the name of the psymtabs we create.
10018 E.g. expand_line_sal requires this when finding psymtabs to expand.
10019 A good testcase for this is mb-inline.exp. */
10022 dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd,
10023 struct dwarf2_cu *cu, struct partial_symtab *pst)
10025 gdb_byte *line_ptr, *extended_end;
10026 gdb_byte *line_end;
10027 unsigned int bytes_read, extended_len;
10028 unsigned char op_code, extended_op, adj_opcode;
10029 CORE_ADDR baseaddr;
10030 struct objfile *objfile = cu->objfile;
10031 struct gdbarch *gdbarch = get_objfile_arch (objfile);
10032 const int decode_for_pst_p = (pst != NULL);
10033 struct subfile *last_subfile = NULL, *first_subfile = current_subfile;
10035 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
10037 line_ptr = lh->statement_program_start;
10038 line_end = lh->statement_program_end;
10040 /* Read the statement sequences until there's nothing left. */
10041 while (line_ptr < line_end)
10043 /* state machine registers */
10044 CORE_ADDR address = 0;
10045 unsigned int file = 1;
10046 unsigned int line = 1;
10047 unsigned int column = 0;
10048 int is_stmt = lh->default_is_stmt;
10049 int basic_block = 0;
10050 int end_sequence = 0;
10052 unsigned char op_index = 0;
10054 if (!decode_for_pst_p && lh->num_file_names >= file)
10056 /* Start a subfile for the current file of the state machine. */
10057 /* lh->include_dirs and lh->file_names are 0-based, but the
10058 directory and file name numbers in the statement program
10060 struct file_entry *fe = &lh->file_names[file - 1];
10064 dir = lh->include_dirs[fe->dir_index - 1];
10066 dwarf2_start_subfile (fe->name, dir, comp_dir);
10069 /* Decode the table. */
10070 while (!end_sequence)
10072 op_code = read_1_byte (abfd, line_ptr);
10074 if (line_ptr > line_end)
10076 dwarf2_debug_line_missing_end_sequence_complaint ();
10080 if (op_code >= lh->opcode_base)
10082 /* Special operand. */
10083 adj_opcode = op_code - lh->opcode_base;
10084 address += (((op_index + (adj_opcode / lh->line_range))
10085 / lh->maximum_ops_per_instruction)
10086 * lh->minimum_instruction_length);
10087 op_index = ((op_index + (adj_opcode / lh->line_range))
10088 % lh->maximum_ops_per_instruction);
10089 line += lh->line_base + (adj_opcode % lh->line_range);
10090 if (lh->num_file_names < file || file == 0)
10091 dwarf2_debug_line_missing_file_complaint ();
10092 /* For now we ignore lines not starting on an
10093 instruction boundary. */
10094 else if (op_index == 0)
10096 lh->file_names[file - 1].included_p = 1;
10097 if (!decode_for_pst_p && is_stmt)
10099 if (last_subfile != current_subfile)
10101 addr = gdbarch_addr_bits_remove (gdbarch, address);
10103 record_line (last_subfile, 0, addr);
10104 last_subfile = current_subfile;
10106 /* Append row to matrix using current values. */
10107 addr = check_cu_functions (address, cu);
10108 addr = gdbarch_addr_bits_remove (gdbarch, addr);
10109 record_line (current_subfile, line, addr);
10114 else switch (op_code)
10116 case DW_LNS_extended_op:
10117 extended_len = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10118 line_ptr += bytes_read;
10119 extended_end = line_ptr + extended_len;
10120 extended_op = read_1_byte (abfd, line_ptr);
10122 switch (extended_op)
10124 case DW_LNE_end_sequence:
10127 case DW_LNE_set_address:
10128 address = read_address (abfd, line_ptr, cu, &bytes_read);
10130 line_ptr += bytes_read;
10131 address += baseaddr;
10133 case DW_LNE_define_file:
10136 unsigned int dir_index, mod_time, length;
10138 cur_file = read_direct_string (abfd, line_ptr, &bytes_read);
10139 line_ptr += bytes_read;
10141 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10142 line_ptr += bytes_read;
10144 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10145 line_ptr += bytes_read;
10147 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10148 line_ptr += bytes_read;
10149 add_file_name (lh, cur_file, dir_index, mod_time, length);
10152 case DW_LNE_set_discriminator:
10153 /* The discriminator is not interesting to the debugger;
10155 line_ptr = extended_end;
10158 complaint (&symfile_complaints,
10159 _("mangled .debug_line section"));
10162 /* Make sure that we parsed the extended op correctly. If e.g.
10163 we expected a different address size than the producer used,
10164 we may have read the wrong number of bytes. */
10165 if (line_ptr != extended_end)
10167 complaint (&symfile_complaints,
10168 _("mangled .debug_line section"));
10173 if (lh->num_file_names < file || file == 0)
10174 dwarf2_debug_line_missing_file_complaint ();
10177 lh->file_names[file - 1].included_p = 1;
10178 if (!decode_for_pst_p && is_stmt)
10180 if (last_subfile != current_subfile)
10182 addr = gdbarch_addr_bits_remove (gdbarch, address);
10184 record_line (last_subfile, 0, addr);
10185 last_subfile = current_subfile;
10187 addr = check_cu_functions (address, cu);
10188 addr = gdbarch_addr_bits_remove (gdbarch, addr);
10189 record_line (current_subfile, line, addr);
10194 case DW_LNS_advance_pc:
10197 = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10199 address += (((op_index + adjust)
10200 / lh->maximum_ops_per_instruction)
10201 * lh->minimum_instruction_length);
10202 op_index = ((op_index + adjust)
10203 % lh->maximum_ops_per_instruction);
10204 line_ptr += bytes_read;
10207 case DW_LNS_advance_line:
10208 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
10209 line_ptr += bytes_read;
10211 case DW_LNS_set_file:
10213 /* The arrays lh->include_dirs and lh->file_names are
10214 0-based, but the directory and file name numbers in
10215 the statement program are 1-based. */
10216 struct file_entry *fe;
10219 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10220 line_ptr += bytes_read;
10221 if (lh->num_file_names < file || file == 0)
10222 dwarf2_debug_line_missing_file_complaint ();
10225 fe = &lh->file_names[file - 1];
10227 dir = lh->include_dirs[fe->dir_index - 1];
10228 if (!decode_for_pst_p)
10230 last_subfile = current_subfile;
10231 dwarf2_start_subfile (fe->name, dir, comp_dir);
10236 case DW_LNS_set_column:
10237 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10238 line_ptr += bytes_read;
10240 case DW_LNS_negate_stmt:
10241 is_stmt = (!is_stmt);
10243 case DW_LNS_set_basic_block:
10246 /* Add to the address register of the state machine the
10247 address increment value corresponding to special opcode
10248 255. I.e., this value is scaled by the minimum
10249 instruction length since special opcode 255 would have
10250 scaled the the increment. */
10251 case DW_LNS_const_add_pc:
10253 CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range;
10255 address += (((op_index + adjust)
10256 / lh->maximum_ops_per_instruction)
10257 * lh->minimum_instruction_length);
10258 op_index = ((op_index + adjust)
10259 % lh->maximum_ops_per_instruction);
10262 case DW_LNS_fixed_advance_pc:
10263 address += read_2_bytes (abfd, line_ptr);
10269 /* Unknown standard opcode, ignore it. */
10272 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
10274 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
10275 line_ptr += bytes_read;
10280 if (lh->num_file_names < file || file == 0)
10281 dwarf2_debug_line_missing_file_complaint ();
10284 lh->file_names[file - 1].included_p = 1;
10285 if (!decode_for_pst_p)
10287 addr = gdbarch_addr_bits_remove (gdbarch, address);
10288 record_line (current_subfile, 0, addr);
10293 if (decode_for_pst_p)
10297 /* Now that we're done scanning the Line Header Program, we can
10298 create the psymtab of each included file. */
10299 for (file_index = 0; file_index < lh->num_file_names; file_index++)
10300 if (lh->file_names[file_index].included_p == 1)
10302 char *include_name =
10303 psymtab_include_file_name (lh, file_index, pst, comp_dir);
10304 if (include_name != NULL)
10305 dwarf2_create_include_psymtab (include_name, pst, objfile);
10310 /* Make sure a symtab is created for every file, even files
10311 which contain only variables (i.e. no code with associated
10315 struct file_entry *fe;
10317 for (i = 0; i < lh->num_file_names; i++)
10321 fe = &lh->file_names[i];
10323 dir = lh->include_dirs[fe->dir_index - 1];
10324 dwarf2_start_subfile (fe->name, dir, comp_dir);
10326 /* Skip the main file; we don't need it, and it must be
10327 allocated last, so that it will show up before the
10328 non-primary symtabs in the objfile's symtab list. */
10329 if (current_subfile == first_subfile)
10332 if (current_subfile->symtab == NULL)
10333 current_subfile->symtab = allocate_symtab (current_subfile->name,
10335 fe->symtab = current_subfile->symtab;
10340 /* Start a subfile for DWARF. FILENAME is the name of the file and
10341 DIRNAME the name of the source directory which contains FILENAME
10342 or NULL if not known. COMP_DIR is the compilation directory for the
10343 linetable's compilation unit or NULL if not known.
10344 This routine tries to keep line numbers from identical absolute and
10345 relative file names in a common subfile.
10347 Using the `list' example from the GDB testsuite, which resides in
10348 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
10349 of /srcdir/list0.c yields the following debugging information for list0.c:
10351 DW_AT_name: /srcdir/list0.c
10352 DW_AT_comp_dir: /compdir
10353 files.files[0].name: list0.h
10354 files.files[0].dir: /srcdir
10355 files.files[1].name: list0.c
10356 files.files[1].dir: /srcdir
10358 The line number information for list0.c has to end up in a single
10359 subfile, so that `break /srcdir/list0.c:1' works as expected.
10360 start_subfile will ensure that this happens provided that we pass the
10361 concatenation of files.files[1].dir and files.files[1].name as the
10365 dwarf2_start_subfile (char *filename, char *dirname, char *comp_dir)
10369 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
10370 `start_symtab' will always pass the contents of DW_AT_comp_dir as
10371 second argument to start_subfile. To be consistent, we do the
10372 same here. In order not to lose the line information directory,
10373 we concatenate it to the filename when it makes sense.
10374 Note that the Dwarf3 standard says (speaking of filenames in line
10375 information): ``The directory index is ignored for file names
10376 that represent full path names''. Thus ignoring dirname in the
10377 `else' branch below isn't an issue. */
10379 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
10380 fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
10382 fullname = filename;
10384 start_subfile (fullname, comp_dir);
10386 if (fullname != filename)
10391 var_decode_location (struct attribute *attr, struct symbol *sym,
10392 struct dwarf2_cu *cu)
10394 struct objfile *objfile = cu->objfile;
10395 struct comp_unit_head *cu_header = &cu->header;
10397 /* NOTE drow/2003-01-30: There used to be a comment and some special
10398 code here to turn a symbol with DW_AT_external and a
10399 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
10400 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
10401 with some versions of binutils) where shared libraries could have
10402 relocations against symbols in their debug information - the
10403 minimal symbol would have the right address, but the debug info
10404 would not. It's no longer necessary, because we will explicitly
10405 apply relocations when we read in the debug information now. */
10407 /* A DW_AT_location attribute with no contents indicates that a
10408 variable has been optimized away. */
10409 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
10411 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
10415 /* Handle one degenerate form of location expression specially, to
10416 preserve GDB's previous behavior when section offsets are
10417 specified. If this is just a DW_OP_addr then mark this symbol
10420 if (attr_form_is_block (attr)
10421 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
10422 && DW_BLOCK (attr)->data[0] == DW_OP_addr)
10424 unsigned int dummy;
10426 SYMBOL_VALUE_ADDRESS (sym) =
10427 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
10428 SYMBOL_CLASS (sym) = LOC_STATIC;
10429 fixup_symbol_section (sym, objfile);
10430 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
10431 SYMBOL_SECTION (sym));
10435 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
10436 expression evaluator, and use LOC_COMPUTED only when necessary
10437 (i.e. when the value of a register or memory location is
10438 referenced, or a thread-local block, etc.). Then again, it might
10439 not be worthwhile. I'm assuming that it isn't unless performance
10440 or memory numbers show me otherwise. */
10442 dwarf2_symbol_mark_computed (attr, sym, cu);
10443 SYMBOL_CLASS (sym) = LOC_COMPUTED;
10446 /* Given a pointer to a DWARF information entry, figure out if we need
10447 to make a symbol table entry for it, and if so, create a new entry
10448 and return a pointer to it.
10449 If TYPE is NULL, determine symbol type from the die, otherwise
10450 used the passed type.
10451 If SPACE is not NULL, use it to hold the new symbol. If it is
10452 NULL, allocate a new symbol on the objfile's obstack. */
10454 static struct symbol *
10455 new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu,
10456 struct symbol *space)
10458 struct objfile *objfile = cu->objfile;
10459 struct symbol *sym = NULL;
10461 struct attribute *attr = NULL;
10462 struct attribute *attr2 = NULL;
10463 CORE_ADDR baseaddr;
10464 struct pending **list_to_add = NULL;
10466 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
10468 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
10470 name = dwarf2_name (die, cu);
10473 const char *linkagename;
10474 int suppress_add = 0;
10479 sym = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol);
10480 OBJSTAT (objfile, n_syms++);
10482 /* Cache this symbol's name and the name's demangled form (if any). */
10483 SYMBOL_SET_LANGUAGE (sym, cu->language);
10484 linkagename = dwarf2_physname (name, die, cu);
10485 SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile);
10487 /* Fortran does not have mangling standard and the mangling does differ
10488 between gfortran, iFort etc. */
10489 if (cu->language == language_fortran
10490 && symbol_get_demangled_name (&(sym->ginfo)) == NULL)
10491 symbol_set_demangled_name (&(sym->ginfo),
10492 (char *) dwarf2_full_name (name, die, cu),
10495 /* Default assumptions.
10496 Use the passed type or decode it from the die. */
10497 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
10498 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
10500 SYMBOL_TYPE (sym) = type;
10502 SYMBOL_TYPE (sym) = die_type (die, cu);
10503 attr = dwarf2_attr (die,
10504 inlined_func ? DW_AT_call_line : DW_AT_decl_line,
10508 SYMBOL_LINE (sym) = DW_UNSND (attr);
10511 attr = dwarf2_attr (die,
10512 inlined_func ? DW_AT_call_file : DW_AT_decl_file,
10516 int file_index = DW_UNSND (attr);
10518 if (cu->line_header == NULL
10519 || file_index > cu->line_header->num_file_names)
10520 complaint (&symfile_complaints,
10521 _("file index out of range"));
10522 else if (file_index > 0)
10524 struct file_entry *fe;
10526 fe = &cu->line_header->file_names[file_index - 1];
10527 SYMBOL_SYMTAB (sym) = fe->symtab;
10534 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
10537 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
10539 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr;
10540 SYMBOL_DOMAIN (sym) = LABEL_DOMAIN;
10541 SYMBOL_CLASS (sym) = LOC_LABEL;
10542 add_symbol_to_list (sym, cu->list_in_scope);
10544 case DW_TAG_subprogram:
10545 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10547 SYMBOL_CLASS (sym) = LOC_BLOCK;
10548 attr2 = dwarf2_attr (die, DW_AT_external, cu);
10549 if ((attr2 && (DW_UNSND (attr2) != 0))
10550 || cu->language == language_ada)
10552 /* Subprograms marked external are stored as a global symbol.
10553 Ada subprograms, whether marked external or not, are always
10554 stored as a global symbol, because we want to be able to
10555 access them globally. For instance, we want to be able
10556 to break on a nested subprogram without having to
10557 specify the context. */
10558 list_to_add = &global_symbols;
10562 list_to_add = cu->list_in_scope;
10565 case DW_TAG_inlined_subroutine:
10566 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10568 SYMBOL_CLASS (sym) = LOC_BLOCK;
10569 SYMBOL_INLINED (sym) = 1;
10570 /* Do not add the symbol to any lists. It will be found via
10571 BLOCK_FUNCTION from the blockvector. */
10573 case DW_TAG_template_value_param:
10575 /* Fall through. */
10576 case DW_TAG_variable:
10577 case DW_TAG_member:
10578 /* Compilation with minimal debug info may result in variables
10579 with missing type entries. Change the misleading `void' type
10580 to something sensible. */
10581 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
10583 = objfile_type (objfile)->nodebug_data_symbol;
10585 attr = dwarf2_attr (die, DW_AT_const_value, cu);
10586 /* In the case of DW_TAG_member, we should only be called for
10587 static const members. */
10588 if (die->tag == DW_TAG_member)
10590 /* dwarf2_add_field uses die_is_declaration,
10591 so we do the same. */
10592 gdb_assert (die_is_declaration (die, cu));
10597 dwarf2_const_value (attr, sym, cu);
10598 attr2 = dwarf2_attr (die, DW_AT_external, cu);
10601 if (attr2 && (DW_UNSND (attr2) != 0))
10602 list_to_add = &global_symbols;
10604 list_to_add = cu->list_in_scope;
10608 attr = dwarf2_attr (die, DW_AT_location, cu);
10611 var_decode_location (attr, sym, cu);
10612 attr2 = dwarf2_attr (die, DW_AT_external, cu);
10613 if (SYMBOL_CLASS (sym) == LOC_STATIC
10614 && SYMBOL_VALUE_ADDRESS (sym) == 0
10615 && !dwarf2_per_objfile->has_section_at_zero)
10617 /* When a static variable is eliminated by the linker,
10618 the corresponding debug information is not stripped
10619 out, but the variable address is set to null;
10620 do not add such variables into symbol table. */
10622 else if (attr2 && (DW_UNSND (attr2) != 0))
10624 /* Workaround gfortran PR debug/40040 - it uses
10625 DW_AT_location for variables in -fPIC libraries which may
10626 get overriden by other libraries/executable and get
10627 a different address. Resolve it by the minimal symbol
10628 which may come from inferior's executable using copy
10629 relocation. Make this workaround only for gfortran as for
10630 other compilers GDB cannot guess the minimal symbol
10631 Fortran mangling kind. */
10632 if (cu->language == language_fortran && die->parent
10633 && die->parent->tag == DW_TAG_module
10635 && strncmp (cu->producer, "GNU Fortran ", 12) == 0)
10636 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
10638 /* A variable with DW_AT_external is never static,
10639 but it may be block-scoped. */
10640 list_to_add = (cu->list_in_scope == &file_symbols
10641 ? &global_symbols : cu->list_in_scope);
10644 list_to_add = cu->list_in_scope;
10648 /* We do not know the address of this symbol.
10649 If it is an external symbol and we have type information
10650 for it, enter the symbol as a LOC_UNRESOLVED symbol.
10651 The address of the variable will then be determined from
10652 the minimal symbol table whenever the variable is
10654 attr2 = dwarf2_attr (die, DW_AT_external, cu);
10655 if (attr2 && (DW_UNSND (attr2) != 0)
10656 && dwarf2_attr (die, DW_AT_type, cu) != NULL)
10658 /* A variable with DW_AT_external is never static, but it
10659 may be block-scoped. */
10660 list_to_add = (cu->list_in_scope == &file_symbols
10661 ? &global_symbols : cu->list_in_scope);
10663 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
10665 else if (!die_is_declaration (die, cu))
10667 /* Use the default LOC_OPTIMIZED_OUT class. */
10668 gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT);
10670 list_to_add = cu->list_in_scope;
10674 case DW_TAG_formal_parameter:
10675 /* If we are inside a function, mark this as an argument. If
10676 not, we might be looking at an argument to an inlined function
10677 when we do not have enough information to show inlined frames;
10678 pretend it's a local variable in that case so that the user can
10680 if (context_stack_depth > 0
10681 && context_stack[context_stack_depth - 1].name != NULL)
10682 SYMBOL_IS_ARGUMENT (sym) = 1;
10683 attr = dwarf2_attr (die, DW_AT_location, cu);
10686 var_decode_location (attr, sym, cu);
10688 attr = dwarf2_attr (die, DW_AT_const_value, cu);
10691 dwarf2_const_value (attr, sym, cu);
10693 attr = dwarf2_attr (die, DW_AT_variable_parameter, cu);
10694 if (attr && DW_UNSND (attr))
10696 struct type *ref_type;
10698 ref_type = lookup_reference_type (SYMBOL_TYPE (sym));
10699 SYMBOL_TYPE (sym) = ref_type;
10702 list_to_add = cu->list_in_scope;
10704 case DW_TAG_unspecified_parameters:
10705 /* From varargs functions; gdb doesn't seem to have any
10706 interest in this information, so just ignore it for now.
10709 case DW_TAG_template_type_param:
10711 /* Fall through. */
10712 case DW_TAG_class_type:
10713 case DW_TAG_interface_type:
10714 case DW_TAG_structure_type:
10715 case DW_TAG_union_type:
10716 case DW_TAG_set_type:
10717 case DW_TAG_enumeration_type:
10718 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
10719 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
10722 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
10723 really ever be static objects: otherwise, if you try
10724 to, say, break of a class's method and you're in a file
10725 which doesn't mention that class, it won't work unless
10726 the check for all static symbols in lookup_symbol_aux
10727 saves you. See the OtherFileClass tests in
10728 gdb.c++/namespace.exp. */
10732 list_to_add = (cu->list_in_scope == &file_symbols
10733 && (cu->language == language_cplus
10734 || cu->language == language_java)
10735 ? &global_symbols : cu->list_in_scope);
10737 /* The semantics of C++ state that "struct foo {
10738 ... }" also defines a typedef for "foo". A Java
10739 class declaration also defines a typedef for the
10741 if (cu->language == language_cplus
10742 || cu->language == language_java
10743 || cu->language == language_ada)
10745 /* The symbol's name is already allocated along
10746 with this objfile, so we don't need to
10747 duplicate it for the type. */
10748 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
10749 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
10754 case DW_TAG_typedef:
10755 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
10756 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
10757 list_to_add = cu->list_in_scope;
10759 case DW_TAG_base_type:
10760 case DW_TAG_subrange_type:
10761 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
10762 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
10763 list_to_add = cu->list_in_scope;
10765 case DW_TAG_enumerator:
10766 attr = dwarf2_attr (die, DW_AT_const_value, cu);
10769 dwarf2_const_value (attr, sym, cu);
10772 /* NOTE: carlton/2003-11-10: See comment above in the
10773 DW_TAG_class_type, etc. block. */
10775 list_to_add = (cu->list_in_scope == &file_symbols
10776 && (cu->language == language_cplus
10777 || cu->language == language_java)
10778 ? &global_symbols : cu->list_in_scope);
10781 case DW_TAG_namespace:
10782 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
10783 list_to_add = &global_symbols;
10786 /* Not a tag we recognize. Hopefully we aren't processing
10787 trash data, but since we must specifically ignore things
10788 we don't recognize, there is nothing else we should do at
10790 complaint (&symfile_complaints, _("unsupported tag: '%s'"),
10791 dwarf_tag_name (die->tag));
10797 sym->hash_next = objfile->template_symbols;
10798 objfile->template_symbols = sym;
10799 list_to_add = NULL;
10802 if (list_to_add != NULL)
10803 add_symbol_to_list (sym, list_to_add);
10805 /* For the benefit of old versions of GCC, check for anonymous
10806 namespaces based on the demangled name. */
10807 if (!processing_has_namespace_info
10808 && cu->language == language_cplus)
10809 cp_scan_for_anonymous_namespaces (sym);
10814 /* A wrapper for new_symbol_full that always allocates a new symbol. */
10816 static struct symbol *
10817 new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
10819 return new_symbol_full (die, type, cu, NULL);
10822 /* Given an attr with a DW_FORM_dataN value in host byte order,
10823 zero-extend it as appropriate for the symbol's type. The DWARF
10824 standard (v4) is not entirely clear about the meaning of using
10825 DW_FORM_dataN for a constant with a signed type, where the type is
10826 wider than the data. The conclusion of a discussion on the DWARF
10827 list was that this is unspecified. We choose to always zero-extend
10828 because that is the interpretation long in use by GCC. */
10831 dwarf2_const_value_data (struct attribute *attr, struct type *type,
10832 const char *name, struct obstack *obstack,
10833 struct dwarf2_cu *cu, long *value, int bits)
10835 struct objfile *objfile = cu->objfile;
10836 enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ?
10837 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
10838 LONGEST l = DW_UNSND (attr);
10840 if (bits < sizeof (*value) * 8)
10842 l &= ((LONGEST) 1 << bits) - 1;
10845 else if (bits == sizeof (*value) * 8)
10849 gdb_byte *bytes = obstack_alloc (obstack, bits / 8);
10850 store_unsigned_integer (bytes, bits / 8, byte_order, l);
10857 /* Read a constant value from an attribute. Either set *VALUE, or if
10858 the value does not fit in *VALUE, set *BYTES - either already
10859 allocated on the objfile obstack, or newly allocated on OBSTACK,
10860 or, set *BATON, if we translated the constant to a location
10864 dwarf2_const_value_attr (struct attribute *attr, struct type *type,
10865 const char *name, struct obstack *obstack,
10866 struct dwarf2_cu *cu,
10867 long *value, gdb_byte **bytes,
10868 struct dwarf2_locexpr_baton **baton)
10870 struct objfile *objfile = cu->objfile;
10871 struct comp_unit_head *cu_header = &cu->header;
10872 struct dwarf_block *blk;
10873 enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ?
10874 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE);
10880 switch (attr->form)
10886 if (TYPE_LENGTH (type) != cu_header->addr_size)
10887 dwarf2_const_value_length_mismatch_complaint (name,
10888 cu_header->addr_size,
10889 TYPE_LENGTH (type));
10890 /* Symbols of this form are reasonably rare, so we just
10891 piggyback on the existing location code rather than writing
10892 a new implementation of symbol_computed_ops. */
10893 *baton = obstack_alloc (&objfile->objfile_obstack,
10894 sizeof (struct dwarf2_locexpr_baton));
10895 (*baton)->per_cu = cu->per_cu;
10896 gdb_assert ((*baton)->per_cu);
10898 (*baton)->size = 2 + cu_header->addr_size;
10899 data = obstack_alloc (&objfile->objfile_obstack, (*baton)->size);
10900 (*baton)->data = data;
10902 data[0] = DW_OP_addr;
10903 store_unsigned_integer (&data[1], cu_header->addr_size,
10904 byte_order, DW_ADDR (attr));
10905 data[cu_header->addr_size + 1] = DW_OP_stack_value;
10908 case DW_FORM_string:
10910 /* DW_STRING is already allocated on the objfile obstack, point
10912 *bytes = (gdb_byte *) DW_STRING (attr);
10914 case DW_FORM_block1:
10915 case DW_FORM_block2:
10916 case DW_FORM_block4:
10917 case DW_FORM_block:
10918 case DW_FORM_exprloc:
10919 blk = DW_BLOCK (attr);
10920 if (TYPE_LENGTH (type) != blk->size)
10921 dwarf2_const_value_length_mismatch_complaint (name, blk->size,
10922 TYPE_LENGTH (type));
10923 *bytes = blk->data;
10926 /* The DW_AT_const_value attributes are supposed to carry the
10927 symbol's value "represented as it would be on the target
10928 architecture." By the time we get here, it's already been
10929 converted to host endianness, so we just need to sign- or
10930 zero-extend it as appropriate. */
10931 case DW_FORM_data1:
10932 *bytes = dwarf2_const_value_data (attr, type, name, obstack, cu, value, 8);
10934 case DW_FORM_data2:
10935 *bytes = dwarf2_const_value_data (attr, type, name, obstack, cu, value, 16);
10937 case DW_FORM_data4:
10938 *bytes = dwarf2_const_value_data (attr, type, name, obstack, cu, value, 32);
10940 case DW_FORM_data8:
10941 *bytes = dwarf2_const_value_data (attr, type, name, obstack, cu, value, 64);
10944 case DW_FORM_sdata:
10945 *value = DW_SND (attr);
10948 case DW_FORM_udata:
10949 *value = DW_UNSND (attr);
10953 complaint (&symfile_complaints,
10954 _("unsupported const value attribute form: '%s'"),
10955 dwarf_form_name (attr->form));
10962 /* Copy constant value from an attribute to a symbol. */
10965 dwarf2_const_value (struct attribute *attr, struct symbol *sym,
10966 struct dwarf2_cu *cu)
10968 struct objfile *objfile = cu->objfile;
10969 struct comp_unit_head *cu_header = &cu->header;
10972 struct dwarf2_locexpr_baton *baton;
10974 dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym),
10975 SYMBOL_PRINT_NAME (sym),
10976 &objfile->objfile_obstack, cu,
10977 &value, &bytes, &baton);
10981 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
10982 SYMBOL_LOCATION_BATON (sym) = baton;
10983 SYMBOL_CLASS (sym) = LOC_COMPUTED;
10985 else if (bytes != NULL)
10987 SYMBOL_VALUE_BYTES (sym) = bytes;
10988 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
10992 SYMBOL_VALUE (sym) = value;
10993 SYMBOL_CLASS (sym) = LOC_CONST;
10997 /* Return the type of the die in question using its DW_AT_type attribute. */
10999 static struct type *
11000 die_type (struct die_info *die, struct dwarf2_cu *cu)
11002 struct attribute *type_attr;
11004 type_attr = dwarf2_attr (die, DW_AT_type, cu);
11007 /* A missing DW_AT_type represents a void type. */
11008 return objfile_type (cu->objfile)->builtin_void;
11011 return lookup_die_type (die, type_attr, cu);
11014 /* True iff CU's producer generates GNAT Ada auxiliary information
11015 that allows to find parallel types through that information instead
11016 of having to do expensive parallel lookups by type name. */
11019 need_gnat_info (struct dwarf2_cu *cu)
11021 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
11022 of GNAT produces this auxiliary information, without any indication
11023 that it is produced. Part of enhancing the FSF version of GNAT
11024 to produce that information will be to put in place an indicator
11025 that we can use in order to determine whether the descriptive type
11026 info is available or not. One suggestion that has been made is
11027 to use a new attribute, attached to the CU die. For now, assume
11028 that the descriptive type info is not available. */
11032 /* Return the auxiliary type of the die in question using its
11033 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
11034 attribute is not present. */
11036 static struct type *
11037 die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu)
11039 struct attribute *type_attr;
11041 type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu);
11045 return lookup_die_type (die, type_attr, cu);
11048 /* If DIE has a descriptive_type attribute, then set the TYPE's
11049 descriptive type accordingly. */
11052 set_descriptive_type (struct type *type, struct die_info *die,
11053 struct dwarf2_cu *cu)
11055 struct type *descriptive_type = die_descriptive_type (die, cu);
11057 if (descriptive_type)
11059 ALLOCATE_GNAT_AUX_TYPE (type);
11060 TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type;
11064 /* Return the containing type of the die in question using its
11065 DW_AT_containing_type attribute. */
11067 static struct type *
11068 die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
11070 struct attribute *type_attr;
11072 type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
11074 error (_("Dwarf Error: Problem turning containing type into gdb type "
11075 "[in module %s]"), cu->objfile->name);
11077 return lookup_die_type (die, type_attr, cu);
11080 /* Look up the type of DIE in CU using its type attribute ATTR.
11081 If there is no type substitute an error marker. */
11083 static struct type *
11084 lookup_die_type (struct die_info *die, struct attribute *attr,
11085 struct dwarf2_cu *cu)
11087 struct type *this_type;
11089 /* First see if we have it cached. */
11091 if (is_ref_attr (attr))
11093 unsigned int offset = dwarf2_get_ref_die_offset (attr);
11095 this_type = get_die_type_at_offset (offset, cu->per_cu);
11097 else if (attr->form == DW_FORM_sig8)
11099 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
11100 struct dwarf2_cu *sig_cu;
11101 unsigned int offset;
11103 /* sig_type will be NULL if the signatured type is missing from
11105 if (sig_type == NULL)
11106 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
11107 "at 0x%x [in module %s]"),
11108 die->offset, cu->objfile->name);
11110 gdb_assert (sig_type->per_cu.from_debug_types);
11111 offset = sig_type->offset + sig_type->type_offset;
11112 this_type = get_die_type_at_offset (offset, &sig_type->per_cu);
11116 dump_die_for_error (die);
11117 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
11118 dwarf_attr_name (attr->name), cu->objfile->name);
11121 /* If not cached we need to read it in. */
11123 if (this_type == NULL)
11125 struct die_info *type_die;
11126 struct dwarf2_cu *type_cu = cu;
11128 type_die = follow_die_ref_or_sig (die, attr, &type_cu);
11129 /* If the type is cached, we should have found it above. */
11130 gdb_assert (get_die_type (type_die, type_cu) == NULL);
11131 this_type = read_type_die_1 (type_die, type_cu);
11134 /* If we still don't have a type use an error marker. */
11136 if (this_type == NULL)
11138 char *message, *saved;
11140 /* read_type_die already issued a complaint. */
11141 message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
11145 saved = obstack_copy0 (&cu->objfile->objfile_obstack,
11146 message, strlen (message));
11149 this_type = init_type (TYPE_CODE_ERROR, 0, 0, saved, cu->objfile);
11155 /* Return the type in DIE, CU.
11156 Returns NULL for invalid types.
11158 This first does a lookup in the appropriate type_hash table,
11159 and only reads the die in if necessary.
11161 NOTE: This can be called when reading in partial or full symbols. */
11163 static struct type *
11164 read_type_die (struct die_info *die, struct dwarf2_cu *cu)
11166 struct type *this_type;
11168 this_type = get_die_type (die, cu);
11172 return read_type_die_1 (die, cu);
11175 /* Read the type in DIE, CU.
11176 Returns NULL for invalid types. */
11178 static struct type *
11179 read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu)
11181 struct type *this_type = NULL;
11185 case DW_TAG_class_type:
11186 case DW_TAG_interface_type:
11187 case DW_TAG_structure_type:
11188 case DW_TAG_union_type:
11189 this_type = read_structure_type (die, cu);
11191 case DW_TAG_enumeration_type:
11192 this_type = read_enumeration_type (die, cu);
11194 case DW_TAG_subprogram:
11195 case DW_TAG_subroutine_type:
11196 case DW_TAG_inlined_subroutine:
11197 this_type = read_subroutine_type (die, cu);
11199 case DW_TAG_array_type:
11200 this_type = read_array_type (die, cu);
11202 case DW_TAG_set_type:
11203 this_type = read_set_type (die, cu);
11205 case DW_TAG_pointer_type:
11206 this_type = read_tag_pointer_type (die, cu);
11208 case DW_TAG_ptr_to_member_type:
11209 this_type = read_tag_ptr_to_member_type (die, cu);
11211 case DW_TAG_reference_type:
11212 this_type = read_tag_reference_type (die, cu);
11214 case DW_TAG_const_type:
11215 this_type = read_tag_const_type (die, cu);
11217 case DW_TAG_volatile_type:
11218 this_type = read_tag_volatile_type (die, cu);
11220 case DW_TAG_string_type:
11221 this_type = read_tag_string_type (die, cu);
11223 case DW_TAG_typedef:
11224 this_type = read_typedef (die, cu);
11226 case DW_TAG_subrange_type:
11227 this_type = read_subrange_type (die, cu);
11229 case DW_TAG_base_type:
11230 this_type = read_base_type (die, cu);
11232 case DW_TAG_unspecified_type:
11233 this_type = read_unspecified_type (die, cu);
11235 case DW_TAG_namespace:
11236 this_type = read_namespace_type (die, cu);
11238 case DW_TAG_module:
11239 this_type = read_module_type (die, cu);
11242 complaint (&symfile_complaints, _("unexpected tag in read_type_die: '%s'"),
11243 dwarf_tag_name (die->tag));
11250 /* Return the name of the namespace/class that DIE is defined within,
11251 or "" if we can't tell. The caller should not xfree the result.
11253 For example, if we're within the method foo() in the following
11263 then determine_prefix on foo's die will return "N::C". */
11266 determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
11268 struct die_info *parent, *spec_die;
11269 struct dwarf2_cu *spec_cu;
11270 struct type *parent_type;
11272 if (cu->language != language_cplus && cu->language != language_java
11273 && cu->language != language_fortran)
11276 /* We have to be careful in the presence of DW_AT_specification.
11277 For example, with GCC 3.4, given the code
11281 // Definition of N::foo.
11285 then we'll have a tree of DIEs like this:
11287 1: DW_TAG_compile_unit
11288 2: DW_TAG_namespace // N
11289 3: DW_TAG_subprogram // declaration of N::foo
11290 4: DW_TAG_subprogram // definition of N::foo
11291 DW_AT_specification // refers to die #3
11293 Thus, when processing die #4, we have to pretend that we're in
11294 the context of its DW_AT_specification, namely the contex of die
11297 spec_die = die_specification (die, &spec_cu);
11298 if (spec_die == NULL)
11299 parent = die->parent;
11302 parent = spec_die->parent;
11306 if (parent == NULL)
11308 else if (parent->building_fullname)
11311 const char *parent_name;
11313 /* It has been seen on RealView 2.2 built binaries,
11314 DW_TAG_template_type_param types actually _defined_ as
11315 children of the parent class:
11318 template class <class Enum> Class{};
11319 Class<enum E> class_e;
11321 1: DW_TAG_class_type (Class)
11322 2: DW_TAG_enumeration_type (E)
11323 3: DW_TAG_enumerator (enum1:0)
11324 3: DW_TAG_enumerator (enum2:1)
11326 2: DW_TAG_template_type_param
11327 DW_AT_type DW_FORM_ref_udata (E)
11329 Besides being broken debug info, it can put GDB into an
11330 infinite loop. Consider:
11332 When we're building the full name for Class<E>, we'll start
11333 at Class, and go look over its template type parameters,
11334 finding E. We'll then try to build the full name of E, and
11335 reach here. We're now trying to build the full name of E,
11336 and look over the parent DIE for containing scope. In the
11337 broken case, if we followed the parent DIE of E, we'd again
11338 find Class, and once again go look at its template type
11339 arguments, etc., etc. Simply don't consider such parent die
11340 as source-level parent of this die (it can't be, the language
11341 doesn't allow it), and break the loop here. */
11342 name = dwarf2_name (die, cu);
11343 parent_name = dwarf2_name (parent, cu);
11344 complaint (&symfile_complaints,
11345 _("template param type '%s' defined within parent '%s'"),
11346 name ? name : "<unknown>",
11347 parent_name ? parent_name : "<unknown>");
11351 switch (parent->tag)
11353 case DW_TAG_namespace:
11354 parent_type = read_type_die (parent, cu);
11355 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
11356 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
11357 Work around this problem here. */
11358 if (cu->language == language_cplus
11359 && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0)
11361 /* We give a name to even anonymous namespaces. */
11362 return TYPE_TAG_NAME (parent_type);
11363 case DW_TAG_class_type:
11364 case DW_TAG_interface_type:
11365 case DW_TAG_structure_type:
11366 case DW_TAG_union_type:
11367 case DW_TAG_module:
11368 parent_type = read_type_die (parent, cu);
11369 if (TYPE_TAG_NAME (parent_type) != NULL)
11370 return TYPE_TAG_NAME (parent_type);
11372 /* An anonymous structure is only allowed non-static data
11373 members; no typedefs, no member functions, et cetera.
11374 So it does not need a prefix. */
11377 return determine_prefix (parent, cu);
11381 /* Return a newly-allocated string formed by concatenating PREFIX and
11382 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
11383 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
11384 perform an obconcat, otherwise allocate storage for the result. The CU argument
11385 is used to determine the language and hence, the appropriate separator. */
11387 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
11390 typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
11391 int physname, struct dwarf2_cu *cu)
11393 const char *lead = "";
11396 if (suffix == NULL || suffix[0] == '\0' || prefix == NULL || prefix[0] == '\0')
11398 else if (cu->language == language_java)
11400 else if (cu->language == language_fortran && physname)
11402 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
11403 DW_AT_MIPS_linkage_name is preferred and used instead. */
11411 if (prefix == NULL)
11413 if (suffix == NULL)
11418 char *retval = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
11420 strcpy (retval, lead);
11421 strcat (retval, prefix);
11422 strcat (retval, sep);
11423 strcat (retval, suffix);
11428 /* We have an obstack. */
11429 return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL);
11433 /* Return sibling of die, NULL if no sibling. */
11435 static struct die_info *
11436 sibling_die (struct die_info *die)
11438 return die->sibling;
11441 /* Get name of a die, return NULL if not found. */
11444 dwarf2_canonicalize_name (char *name, struct dwarf2_cu *cu,
11445 struct obstack *obstack)
11447 if (name && cu->language == language_cplus)
11449 char *canon_name = cp_canonicalize_string (name);
11451 if (canon_name != NULL)
11453 if (strcmp (canon_name, name) != 0)
11454 name = obsavestring (canon_name, strlen (canon_name),
11456 xfree (canon_name);
11463 /* Get name of a die, return NULL if not found. */
11466 dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
11468 struct attribute *attr;
11470 attr = dwarf2_attr (die, DW_AT_name, cu);
11471 if (!attr || !DW_STRING (attr))
11476 case DW_TAG_compile_unit:
11477 /* Compilation units have a DW_AT_name that is a filename, not
11478 a source language identifier. */
11479 case DW_TAG_enumeration_type:
11480 case DW_TAG_enumerator:
11481 /* These tags always have simple identifiers already; no need
11482 to canonicalize them. */
11483 return DW_STRING (attr);
11485 case DW_TAG_subprogram:
11486 /* Java constructors will all be named "<init>", so return
11487 the class name when we see this special case. */
11488 if (cu->language == language_java
11489 && DW_STRING (attr) != NULL
11490 && strcmp (DW_STRING (attr), "<init>") == 0)
11492 struct dwarf2_cu *spec_cu = cu;
11493 struct die_info *spec_die;
11495 /* GCJ will output '<init>' for Java constructor names.
11496 For this special case, return the name of the parent class. */
11498 /* GCJ may output suprogram DIEs with AT_specification set.
11499 If so, use the name of the specified DIE. */
11500 spec_die = die_specification (die, &spec_cu);
11501 if (spec_die != NULL)
11502 return dwarf2_name (spec_die, spec_cu);
11507 if (die->tag == DW_TAG_class_type)
11508 return dwarf2_name (die, cu);
11510 while (die->tag != DW_TAG_compile_unit);
11514 case DW_TAG_class_type:
11515 case DW_TAG_interface_type:
11516 case DW_TAG_structure_type:
11517 case DW_TAG_union_type:
11518 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
11519 structures or unions. These were of the form "._%d" in GCC 4.1,
11520 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
11521 and GCC 4.4. We work around this problem by ignoring these. */
11522 if (strncmp (DW_STRING (attr), "._", 2) == 0
11523 || strncmp (DW_STRING (attr), "<anonymous", 10) == 0)
11531 if (!DW_STRING_IS_CANONICAL (attr))
11534 = dwarf2_canonicalize_name (DW_STRING (attr), cu,
11535 &cu->objfile->objfile_obstack);
11536 DW_STRING_IS_CANONICAL (attr) = 1;
11538 return DW_STRING (attr);
11541 /* Return the die that this die in an extension of, or NULL if there
11542 is none. *EXT_CU is the CU containing DIE on input, and the CU
11543 containing the return value on output. */
11545 static struct die_info *
11546 dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu)
11548 struct attribute *attr;
11550 attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
11554 return follow_die_ref (die, attr, ext_cu);
11557 /* Convert a DIE tag into its string name. */
11560 dwarf_tag_name (unsigned tag)
11564 case DW_TAG_padding:
11565 return "DW_TAG_padding";
11566 case DW_TAG_array_type:
11567 return "DW_TAG_array_type";
11568 case DW_TAG_class_type:
11569 return "DW_TAG_class_type";
11570 case DW_TAG_entry_point:
11571 return "DW_TAG_entry_point";
11572 case DW_TAG_enumeration_type:
11573 return "DW_TAG_enumeration_type";
11574 case DW_TAG_formal_parameter:
11575 return "DW_TAG_formal_parameter";
11576 case DW_TAG_imported_declaration:
11577 return "DW_TAG_imported_declaration";
11579 return "DW_TAG_label";
11580 case DW_TAG_lexical_block:
11581 return "DW_TAG_lexical_block";
11582 case DW_TAG_member:
11583 return "DW_TAG_member";
11584 case DW_TAG_pointer_type:
11585 return "DW_TAG_pointer_type";
11586 case DW_TAG_reference_type:
11587 return "DW_TAG_reference_type";
11588 case DW_TAG_compile_unit:
11589 return "DW_TAG_compile_unit";
11590 case DW_TAG_string_type:
11591 return "DW_TAG_string_type";
11592 case DW_TAG_structure_type:
11593 return "DW_TAG_structure_type";
11594 case DW_TAG_subroutine_type:
11595 return "DW_TAG_subroutine_type";
11596 case DW_TAG_typedef:
11597 return "DW_TAG_typedef";
11598 case DW_TAG_union_type:
11599 return "DW_TAG_union_type";
11600 case DW_TAG_unspecified_parameters:
11601 return "DW_TAG_unspecified_parameters";
11602 case DW_TAG_variant:
11603 return "DW_TAG_variant";
11604 case DW_TAG_common_block:
11605 return "DW_TAG_common_block";
11606 case DW_TAG_common_inclusion:
11607 return "DW_TAG_common_inclusion";
11608 case DW_TAG_inheritance:
11609 return "DW_TAG_inheritance";
11610 case DW_TAG_inlined_subroutine:
11611 return "DW_TAG_inlined_subroutine";
11612 case DW_TAG_module:
11613 return "DW_TAG_module";
11614 case DW_TAG_ptr_to_member_type:
11615 return "DW_TAG_ptr_to_member_type";
11616 case DW_TAG_set_type:
11617 return "DW_TAG_set_type";
11618 case DW_TAG_subrange_type:
11619 return "DW_TAG_subrange_type";
11620 case DW_TAG_with_stmt:
11621 return "DW_TAG_with_stmt";
11622 case DW_TAG_access_declaration:
11623 return "DW_TAG_access_declaration";
11624 case DW_TAG_base_type:
11625 return "DW_TAG_base_type";
11626 case DW_TAG_catch_block:
11627 return "DW_TAG_catch_block";
11628 case DW_TAG_const_type:
11629 return "DW_TAG_const_type";
11630 case DW_TAG_constant:
11631 return "DW_TAG_constant";
11632 case DW_TAG_enumerator:
11633 return "DW_TAG_enumerator";
11634 case DW_TAG_file_type:
11635 return "DW_TAG_file_type";
11636 case DW_TAG_friend:
11637 return "DW_TAG_friend";
11638 case DW_TAG_namelist:
11639 return "DW_TAG_namelist";
11640 case DW_TAG_namelist_item:
11641 return "DW_TAG_namelist_item";
11642 case DW_TAG_packed_type:
11643 return "DW_TAG_packed_type";
11644 case DW_TAG_subprogram:
11645 return "DW_TAG_subprogram";
11646 case DW_TAG_template_type_param:
11647 return "DW_TAG_template_type_param";
11648 case DW_TAG_template_value_param:
11649 return "DW_TAG_template_value_param";
11650 case DW_TAG_thrown_type:
11651 return "DW_TAG_thrown_type";
11652 case DW_TAG_try_block:
11653 return "DW_TAG_try_block";
11654 case DW_TAG_variant_part:
11655 return "DW_TAG_variant_part";
11656 case DW_TAG_variable:
11657 return "DW_TAG_variable";
11658 case DW_TAG_volatile_type:
11659 return "DW_TAG_volatile_type";
11660 case DW_TAG_dwarf_procedure:
11661 return "DW_TAG_dwarf_procedure";
11662 case DW_TAG_restrict_type:
11663 return "DW_TAG_restrict_type";
11664 case DW_TAG_interface_type:
11665 return "DW_TAG_interface_type";
11666 case DW_TAG_namespace:
11667 return "DW_TAG_namespace";
11668 case DW_TAG_imported_module:
11669 return "DW_TAG_imported_module";
11670 case DW_TAG_unspecified_type:
11671 return "DW_TAG_unspecified_type";
11672 case DW_TAG_partial_unit:
11673 return "DW_TAG_partial_unit";
11674 case DW_TAG_imported_unit:
11675 return "DW_TAG_imported_unit";
11676 case DW_TAG_condition:
11677 return "DW_TAG_condition";
11678 case DW_TAG_shared_type:
11679 return "DW_TAG_shared_type";
11680 case DW_TAG_type_unit:
11681 return "DW_TAG_type_unit";
11682 case DW_TAG_MIPS_loop:
11683 return "DW_TAG_MIPS_loop";
11684 case DW_TAG_HP_array_descriptor:
11685 return "DW_TAG_HP_array_descriptor";
11686 case DW_TAG_format_label:
11687 return "DW_TAG_format_label";
11688 case DW_TAG_function_template:
11689 return "DW_TAG_function_template";
11690 case DW_TAG_class_template:
11691 return "DW_TAG_class_template";
11692 case DW_TAG_GNU_BINCL:
11693 return "DW_TAG_GNU_BINCL";
11694 case DW_TAG_GNU_EINCL:
11695 return "DW_TAG_GNU_EINCL";
11696 case DW_TAG_upc_shared_type:
11697 return "DW_TAG_upc_shared_type";
11698 case DW_TAG_upc_strict_type:
11699 return "DW_TAG_upc_strict_type";
11700 case DW_TAG_upc_relaxed_type:
11701 return "DW_TAG_upc_relaxed_type";
11702 case DW_TAG_PGI_kanji_type:
11703 return "DW_TAG_PGI_kanji_type";
11704 case DW_TAG_PGI_interface_block:
11705 return "DW_TAG_PGI_interface_block";
11707 return "DW_TAG_<unknown>";
11711 /* Convert a DWARF attribute code into its string name. */
11714 dwarf_attr_name (unsigned attr)
11718 case DW_AT_sibling:
11719 return "DW_AT_sibling";
11720 case DW_AT_location:
11721 return "DW_AT_location";
11723 return "DW_AT_name";
11724 case DW_AT_ordering:
11725 return "DW_AT_ordering";
11726 case DW_AT_subscr_data:
11727 return "DW_AT_subscr_data";
11728 case DW_AT_byte_size:
11729 return "DW_AT_byte_size";
11730 case DW_AT_bit_offset:
11731 return "DW_AT_bit_offset";
11732 case DW_AT_bit_size:
11733 return "DW_AT_bit_size";
11734 case DW_AT_element_list:
11735 return "DW_AT_element_list";
11736 case DW_AT_stmt_list:
11737 return "DW_AT_stmt_list";
11739 return "DW_AT_low_pc";
11740 case DW_AT_high_pc:
11741 return "DW_AT_high_pc";
11742 case DW_AT_language:
11743 return "DW_AT_language";
11745 return "DW_AT_member";
11747 return "DW_AT_discr";
11748 case DW_AT_discr_value:
11749 return "DW_AT_discr_value";
11750 case DW_AT_visibility:
11751 return "DW_AT_visibility";
11753 return "DW_AT_import";
11754 case DW_AT_string_length:
11755 return "DW_AT_string_length";
11756 case DW_AT_common_reference:
11757 return "DW_AT_common_reference";
11758 case DW_AT_comp_dir:
11759 return "DW_AT_comp_dir";
11760 case DW_AT_const_value:
11761 return "DW_AT_const_value";
11762 case DW_AT_containing_type:
11763 return "DW_AT_containing_type";
11764 case DW_AT_default_value:
11765 return "DW_AT_default_value";
11767 return "DW_AT_inline";
11768 case DW_AT_is_optional:
11769 return "DW_AT_is_optional";
11770 case DW_AT_lower_bound:
11771 return "DW_AT_lower_bound";
11772 case DW_AT_producer:
11773 return "DW_AT_producer";
11774 case DW_AT_prototyped:
11775 return "DW_AT_prototyped";
11776 case DW_AT_return_addr:
11777 return "DW_AT_return_addr";
11778 case DW_AT_start_scope:
11779 return "DW_AT_start_scope";
11780 case DW_AT_bit_stride:
11781 return "DW_AT_bit_stride";
11782 case DW_AT_upper_bound:
11783 return "DW_AT_upper_bound";
11784 case DW_AT_abstract_origin:
11785 return "DW_AT_abstract_origin";
11786 case DW_AT_accessibility:
11787 return "DW_AT_accessibility";
11788 case DW_AT_address_class:
11789 return "DW_AT_address_class";
11790 case DW_AT_artificial:
11791 return "DW_AT_artificial";
11792 case DW_AT_base_types:
11793 return "DW_AT_base_types";
11794 case DW_AT_calling_convention:
11795 return "DW_AT_calling_convention";
11797 return "DW_AT_count";
11798 case DW_AT_data_member_location:
11799 return "DW_AT_data_member_location";
11800 case DW_AT_decl_column:
11801 return "DW_AT_decl_column";
11802 case DW_AT_decl_file:
11803 return "DW_AT_decl_file";
11804 case DW_AT_decl_line:
11805 return "DW_AT_decl_line";
11806 case DW_AT_declaration:
11807 return "DW_AT_declaration";
11808 case DW_AT_discr_list:
11809 return "DW_AT_discr_list";
11810 case DW_AT_encoding:
11811 return "DW_AT_encoding";
11812 case DW_AT_external:
11813 return "DW_AT_external";
11814 case DW_AT_frame_base:
11815 return "DW_AT_frame_base";
11817 return "DW_AT_friend";
11818 case DW_AT_identifier_case:
11819 return "DW_AT_identifier_case";
11820 case DW_AT_macro_info:
11821 return "DW_AT_macro_info";
11822 case DW_AT_namelist_items:
11823 return "DW_AT_namelist_items";
11824 case DW_AT_priority:
11825 return "DW_AT_priority";
11826 case DW_AT_segment:
11827 return "DW_AT_segment";
11828 case DW_AT_specification:
11829 return "DW_AT_specification";
11830 case DW_AT_static_link:
11831 return "DW_AT_static_link";
11833 return "DW_AT_type";
11834 case DW_AT_use_location:
11835 return "DW_AT_use_location";
11836 case DW_AT_variable_parameter:
11837 return "DW_AT_variable_parameter";
11838 case DW_AT_virtuality:
11839 return "DW_AT_virtuality";
11840 case DW_AT_vtable_elem_location:
11841 return "DW_AT_vtable_elem_location";
11842 /* DWARF 3 values. */
11843 case DW_AT_allocated:
11844 return "DW_AT_allocated";
11845 case DW_AT_associated:
11846 return "DW_AT_associated";
11847 case DW_AT_data_location:
11848 return "DW_AT_data_location";
11849 case DW_AT_byte_stride:
11850 return "DW_AT_byte_stride";
11851 case DW_AT_entry_pc:
11852 return "DW_AT_entry_pc";
11853 case DW_AT_use_UTF8:
11854 return "DW_AT_use_UTF8";
11855 case DW_AT_extension:
11856 return "DW_AT_extension";
11858 return "DW_AT_ranges";
11859 case DW_AT_trampoline:
11860 return "DW_AT_trampoline";
11861 case DW_AT_call_column:
11862 return "DW_AT_call_column";
11863 case DW_AT_call_file:
11864 return "DW_AT_call_file";
11865 case DW_AT_call_line:
11866 return "DW_AT_call_line";
11867 case DW_AT_description:
11868 return "DW_AT_description";
11869 case DW_AT_binary_scale:
11870 return "DW_AT_binary_scale";
11871 case DW_AT_decimal_scale:
11872 return "DW_AT_decimal_scale";
11874 return "DW_AT_small";
11875 case DW_AT_decimal_sign:
11876 return "DW_AT_decimal_sign";
11877 case DW_AT_digit_count:
11878 return "DW_AT_digit_count";
11879 case DW_AT_picture_string:
11880 return "DW_AT_picture_string";
11881 case DW_AT_mutable:
11882 return "DW_AT_mutable";
11883 case DW_AT_threads_scaled:
11884 return "DW_AT_threads_scaled";
11885 case DW_AT_explicit:
11886 return "DW_AT_explicit";
11887 case DW_AT_object_pointer:
11888 return "DW_AT_object_pointer";
11889 case DW_AT_endianity:
11890 return "DW_AT_endianity";
11891 case DW_AT_elemental:
11892 return "DW_AT_elemental";
11894 return "DW_AT_pure";
11895 case DW_AT_recursive:
11896 return "DW_AT_recursive";
11897 /* DWARF 4 values. */
11898 case DW_AT_signature:
11899 return "DW_AT_signature";
11900 case DW_AT_linkage_name:
11901 return "DW_AT_linkage_name";
11902 /* SGI/MIPS extensions. */
11903 #ifdef MIPS /* collides with DW_AT_HP_block_index */
11904 case DW_AT_MIPS_fde:
11905 return "DW_AT_MIPS_fde";
11907 case DW_AT_MIPS_loop_begin:
11908 return "DW_AT_MIPS_loop_begin";
11909 case DW_AT_MIPS_tail_loop_begin:
11910 return "DW_AT_MIPS_tail_loop_begin";
11911 case DW_AT_MIPS_epilog_begin:
11912 return "DW_AT_MIPS_epilog_begin";
11913 case DW_AT_MIPS_loop_unroll_factor:
11914 return "DW_AT_MIPS_loop_unroll_factor";
11915 case DW_AT_MIPS_software_pipeline_depth:
11916 return "DW_AT_MIPS_software_pipeline_depth";
11917 case DW_AT_MIPS_linkage_name:
11918 return "DW_AT_MIPS_linkage_name";
11919 case DW_AT_MIPS_stride:
11920 return "DW_AT_MIPS_stride";
11921 case DW_AT_MIPS_abstract_name:
11922 return "DW_AT_MIPS_abstract_name";
11923 case DW_AT_MIPS_clone_origin:
11924 return "DW_AT_MIPS_clone_origin";
11925 case DW_AT_MIPS_has_inlines:
11926 return "DW_AT_MIPS_has_inlines";
11927 /* HP extensions. */
11928 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
11929 case DW_AT_HP_block_index:
11930 return "DW_AT_HP_block_index";
11932 case DW_AT_HP_unmodifiable:
11933 return "DW_AT_HP_unmodifiable";
11934 case DW_AT_HP_actuals_stmt_list:
11935 return "DW_AT_HP_actuals_stmt_list";
11936 case DW_AT_HP_proc_per_section:
11937 return "DW_AT_HP_proc_per_section";
11938 case DW_AT_HP_raw_data_ptr:
11939 return "DW_AT_HP_raw_data_ptr";
11940 case DW_AT_HP_pass_by_reference:
11941 return "DW_AT_HP_pass_by_reference";
11942 case DW_AT_HP_opt_level:
11943 return "DW_AT_HP_opt_level";
11944 case DW_AT_HP_prof_version_id:
11945 return "DW_AT_HP_prof_version_id";
11946 case DW_AT_HP_opt_flags:
11947 return "DW_AT_HP_opt_flags";
11948 case DW_AT_HP_cold_region_low_pc:
11949 return "DW_AT_HP_cold_region_low_pc";
11950 case DW_AT_HP_cold_region_high_pc:
11951 return "DW_AT_HP_cold_region_high_pc";
11952 case DW_AT_HP_all_variables_modifiable:
11953 return "DW_AT_HP_all_variables_modifiable";
11954 case DW_AT_HP_linkage_name:
11955 return "DW_AT_HP_linkage_name";
11956 case DW_AT_HP_prof_flags:
11957 return "DW_AT_HP_prof_flags";
11958 /* GNU extensions. */
11959 case DW_AT_sf_names:
11960 return "DW_AT_sf_names";
11961 case DW_AT_src_info:
11962 return "DW_AT_src_info";
11963 case DW_AT_mac_info:
11964 return "DW_AT_mac_info";
11965 case DW_AT_src_coords:
11966 return "DW_AT_src_coords";
11967 case DW_AT_body_begin:
11968 return "DW_AT_body_begin";
11969 case DW_AT_body_end:
11970 return "DW_AT_body_end";
11971 case DW_AT_GNU_vector:
11972 return "DW_AT_GNU_vector";
11973 case DW_AT_GNU_odr_signature:
11974 return "DW_AT_GNU_odr_signature";
11975 /* VMS extensions. */
11976 case DW_AT_VMS_rtnbeg_pd_address:
11977 return "DW_AT_VMS_rtnbeg_pd_address";
11978 /* UPC extension. */
11979 case DW_AT_upc_threads_scaled:
11980 return "DW_AT_upc_threads_scaled";
11981 /* PGI (STMicroelectronics) extensions. */
11982 case DW_AT_PGI_lbase:
11983 return "DW_AT_PGI_lbase";
11984 case DW_AT_PGI_soffset:
11985 return "DW_AT_PGI_soffset";
11986 case DW_AT_PGI_lstride:
11987 return "DW_AT_PGI_lstride";
11989 return "DW_AT_<unknown>";
11993 /* Convert a DWARF value form code into its string name. */
11996 dwarf_form_name (unsigned form)
12001 return "DW_FORM_addr";
12002 case DW_FORM_block2:
12003 return "DW_FORM_block2";
12004 case DW_FORM_block4:
12005 return "DW_FORM_block4";
12006 case DW_FORM_data2:
12007 return "DW_FORM_data2";
12008 case DW_FORM_data4:
12009 return "DW_FORM_data4";
12010 case DW_FORM_data8:
12011 return "DW_FORM_data8";
12012 case DW_FORM_string:
12013 return "DW_FORM_string";
12014 case DW_FORM_block:
12015 return "DW_FORM_block";
12016 case DW_FORM_block1:
12017 return "DW_FORM_block1";
12018 case DW_FORM_data1:
12019 return "DW_FORM_data1";
12021 return "DW_FORM_flag";
12022 case DW_FORM_sdata:
12023 return "DW_FORM_sdata";
12025 return "DW_FORM_strp";
12026 case DW_FORM_udata:
12027 return "DW_FORM_udata";
12028 case DW_FORM_ref_addr:
12029 return "DW_FORM_ref_addr";
12031 return "DW_FORM_ref1";
12033 return "DW_FORM_ref2";
12035 return "DW_FORM_ref4";
12037 return "DW_FORM_ref8";
12038 case DW_FORM_ref_udata:
12039 return "DW_FORM_ref_udata";
12040 case DW_FORM_indirect:
12041 return "DW_FORM_indirect";
12042 case DW_FORM_sec_offset:
12043 return "DW_FORM_sec_offset";
12044 case DW_FORM_exprloc:
12045 return "DW_FORM_exprloc";
12046 case DW_FORM_flag_present:
12047 return "DW_FORM_flag_present";
12049 return "DW_FORM_sig8";
12051 return "DW_FORM_<unknown>";
12055 /* Convert a DWARF stack opcode into its string name. */
12058 dwarf_stack_op_name (unsigned op, int def)
12063 return "DW_OP_addr";
12065 return "DW_OP_deref";
12066 case DW_OP_const1u:
12067 return "DW_OP_const1u";
12068 case DW_OP_const1s:
12069 return "DW_OP_const1s";
12070 case DW_OP_const2u:
12071 return "DW_OP_const2u";
12072 case DW_OP_const2s:
12073 return "DW_OP_const2s";
12074 case DW_OP_const4u:
12075 return "DW_OP_const4u";
12076 case DW_OP_const4s:
12077 return "DW_OP_const4s";
12078 case DW_OP_const8u:
12079 return "DW_OP_const8u";
12080 case DW_OP_const8s:
12081 return "DW_OP_const8s";
12083 return "DW_OP_constu";
12085 return "DW_OP_consts";
12087 return "DW_OP_dup";
12089 return "DW_OP_drop";
12091 return "DW_OP_over";
12093 return "DW_OP_pick";
12095 return "DW_OP_swap";
12097 return "DW_OP_rot";
12099 return "DW_OP_xderef";
12101 return "DW_OP_abs";
12103 return "DW_OP_and";
12105 return "DW_OP_div";
12107 return "DW_OP_minus";
12109 return "DW_OP_mod";
12111 return "DW_OP_mul";
12113 return "DW_OP_neg";
12115 return "DW_OP_not";
12119 return "DW_OP_plus";
12120 case DW_OP_plus_uconst:
12121 return "DW_OP_plus_uconst";
12123 return "DW_OP_shl";
12125 return "DW_OP_shr";
12127 return "DW_OP_shra";
12129 return "DW_OP_xor";
12131 return "DW_OP_bra";
12145 return "DW_OP_skip";
12147 return "DW_OP_lit0";
12149 return "DW_OP_lit1";
12151 return "DW_OP_lit2";
12153 return "DW_OP_lit3";
12155 return "DW_OP_lit4";
12157 return "DW_OP_lit5";
12159 return "DW_OP_lit6";
12161 return "DW_OP_lit7";
12163 return "DW_OP_lit8";
12165 return "DW_OP_lit9";
12167 return "DW_OP_lit10";
12169 return "DW_OP_lit11";
12171 return "DW_OP_lit12";
12173 return "DW_OP_lit13";
12175 return "DW_OP_lit14";
12177 return "DW_OP_lit15";
12179 return "DW_OP_lit16";
12181 return "DW_OP_lit17";
12183 return "DW_OP_lit18";
12185 return "DW_OP_lit19";
12187 return "DW_OP_lit20";
12189 return "DW_OP_lit21";
12191 return "DW_OP_lit22";
12193 return "DW_OP_lit23";
12195 return "DW_OP_lit24";
12197 return "DW_OP_lit25";
12199 return "DW_OP_lit26";
12201 return "DW_OP_lit27";
12203 return "DW_OP_lit28";
12205 return "DW_OP_lit29";
12207 return "DW_OP_lit30";
12209 return "DW_OP_lit31";
12211 return "DW_OP_reg0";
12213 return "DW_OP_reg1";
12215 return "DW_OP_reg2";
12217 return "DW_OP_reg3";
12219 return "DW_OP_reg4";
12221 return "DW_OP_reg5";
12223 return "DW_OP_reg6";
12225 return "DW_OP_reg7";
12227 return "DW_OP_reg8";
12229 return "DW_OP_reg9";
12231 return "DW_OP_reg10";
12233 return "DW_OP_reg11";
12235 return "DW_OP_reg12";
12237 return "DW_OP_reg13";
12239 return "DW_OP_reg14";
12241 return "DW_OP_reg15";
12243 return "DW_OP_reg16";
12245 return "DW_OP_reg17";
12247 return "DW_OP_reg18";
12249 return "DW_OP_reg19";
12251 return "DW_OP_reg20";
12253 return "DW_OP_reg21";
12255 return "DW_OP_reg22";
12257 return "DW_OP_reg23";
12259 return "DW_OP_reg24";
12261 return "DW_OP_reg25";
12263 return "DW_OP_reg26";
12265 return "DW_OP_reg27";
12267 return "DW_OP_reg28";
12269 return "DW_OP_reg29";
12271 return "DW_OP_reg30";
12273 return "DW_OP_reg31";
12275 return "DW_OP_breg0";
12277 return "DW_OP_breg1";
12279 return "DW_OP_breg2";
12281 return "DW_OP_breg3";
12283 return "DW_OP_breg4";
12285 return "DW_OP_breg5";
12287 return "DW_OP_breg6";
12289 return "DW_OP_breg7";
12291 return "DW_OP_breg8";
12293 return "DW_OP_breg9";
12295 return "DW_OP_breg10";
12297 return "DW_OP_breg11";
12299 return "DW_OP_breg12";
12301 return "DW_OP_breg13";
12303 return "DW_OP_breg14";
12305 return "DW_OP_breg15";
12307 return "DW_OP_breg16";
12309 return "DW_OP_breg17";
12311 return "DW_OP_breg18";
12313 return "DW_OP_breg19";
12315 return "DW_OP_breg20";
12317 return "DW_OP_breg21";
12319 return "DW_OP_breg22";
12321 return "DW_OP_breg23";
12323 return "DW_OP_breg24";
12325 return "DW_OP_breg25";
12327 return "DW_OP_breg26";
12329 return "DW_OP_breg27";
12331 return "DW_OP_breg28";
12333 return "DW_OP_breg29";
12335 return "DW_OP_breg30";
12337 return "DW_OP_breg31";
12339 return "DW_OP_regx";
12341 return "DW_OP_fbreg";
12343 return "DW_OP_bregx";
12345 return "DW_OP_piece";
12346 case DW_OP_deref_size:
12347 return "DW_OP_deref_size";
12348 case DW_OP_xderef_size:
12349 return "DW_OP_xderef_size";
12351 return "DW_OP_nop";
12352 /* DWARF 3 extensions. */
12353 case DW_OP_push_object_address:
12354 return "DW_OP_push_object_address";
12356 return "DW_OP_call2";
12358 return "DW_OP_call4";
12359 case DW_OP_call_ref:
12360 return "DW_OP_call_ref";
12361 case DW_OP_form_tls_address:
12362 return "DW_OP_form_tls_address";
12363 case DW_OP_call_frame_cfa:
12364 return "DW_OP_call_frame_cfa";
12365 case DW_OP_bit_piece:
12366 return "DW_OP_bit_piece";
12367 /* DWARF 4 extensions. */
12368 case DW_OP_implicit_value:
12369 return "DW_OP_implicit_value";
12370 case DW_OP_stack_value:
12371 return "DW_OP_stack_value";
12372 /* GNU extensions. */
12373 case DW_OP_GNU_push_tls_address:
12374 return "DW_OP_GNU_push_tls_address";
12375 case DW_OP_GNU_uninit:
12376 return "DW_OP_GNU_uninit";
12378 return def ? "OP_<unknown>" : NULL;
12383 dwarf_bool_name (unsigned mybool)
12391 /* Convert a DWARF type code into its string name. */
12394 dwarf_type_encoding_name (unsigned enc)
12399 return "DW_ATE_void";
12400 case DW_ATE_address:
12401 return "DW_ATE_address";
12402 case DW_ATE_boolean:
12403 return "DW_ATE_boolean";
12404 case DW_ATE_complex_float:
12405 return "DW_ATE_complex_float";
12407 return "DW_ATE_float";
12408 case DW_ATE_signed:
12409 return "DW_ATE_signed";
12410 case DW_ATE_signed_char:
12411 return "DW_ATE_signed_char";
12412 case DW_ATE_unsigned:
12413 return "DW_ATE_unsigned";
12414 case DW_ATE_unsigned_char:
12415 return "DW_ATE_unsigned_char";
12417 case DW_ATE_imaginary_float:
12418 return "DW_ATE_imaginary_float";
12419 case DW_ATE_packed_decimal:
12420 return "DW_ATE_packed_decimal";
12421 case DW_ATE_numeric_string:
12422 return "DW_ATE_numeric_string";
12423 case DW_ATE_edited:
12424 return "DW_ATE_edited";
12425 case DW_ATE_signed_fixed:
12426 return "DW_ATE_signed_fixed";
12427 case DW_ATE_unsigned_fixed:
12428 return "DW_ATE_unsigned_fixed";
12429 case DW_ATE_decimal_float:
12430 return "DW_ATE_decimal_float";
12433 return "DW_ATE_UTF";
12434 /* HP extensions. */
12435 case DW_ATE_HP_float80:
12436 return "DW_ATE_HP_float80";
12437 case DW_ATE_HP_complex_float80:
12438 return "DW_ATE_HP_complex_float80";
12439 case DW_ATE_HP_float128:
12440 return "DW_ATE_HP_float128";
12441 case DW_ATE_HP_complex_float128:
12442 return "DW_ATE_HP_complex_float128";
12443 case DW_ATE_HP_floathpintel:
12444 return "DW_ATE_HP_floathpintel";
12445 case DW_ATE_HP_imaginary_float80:
12446 return "DW_ATE_HP_imaginary_float80";
12447 case DW_ATE_HP_imaginary_float128:
12448 return "DW_ATE_HP_imaginary_float128";
12450 return "DW_ATE_<unknown>";
12454 /* Convert a DWARF call frame info operation to its string name. */
12458 dwarf_cfi_name (unsigned cfi_opc)
12462 case DW_CFA_advance_loc:
12463 return "DW_CFA_advance_loc";
12464 case DW_CFA_offset:
12465 return "DW_CFA_offset";
12466 case DW_CFA_restore:
12467 return "DW_CFA_restore";
12469 return "DW_CFA_nop";
12470 case DW_CFA_set_loc:
12471 return "DW_CFA_set_loc";
12472 case DW_CFA_advance_loc1:
12473 return "DW_CFA_advance_loc1";
12474 case DW_CFA_advance_loc2:
12475 return "DW_CFA_advance_loc2";
12476 case DW_CFA_advance_loc4:
12477 return "DW_CFA_advance_loc4";
12478 case DW_CFA_offset_extended:
12479 return "DW_CFA_offset_extended";
12480 case DW_CFA_restore_extended:
12481 return "DW_CFA_restore_extended";
12482 case DW_CFA_undefined:
12483 return "DW_CFA_undefined";
12484 case DW_CFA_same_value:
12485 return "DW_CFA_same_value";
12486 case DW_CFA_register:
12487 return "DW_CFA_register";
12488 case DW_CFA_remember_state:
12489 return "DW_CFA_remember_state";
12490 case DW_CFA_restore_state:
12491 return "DW_CFA_restore_state";
12492 case DW_CFA_def_cfa:
12493 return "DW_CFA_def_cfa";
12494 case DW_CFA_def_cfa_register:
12495 return "DW_CFA_def_cfa_register";
12496 case DW_CFA_def_cfa_offset:
12497 return "DW_CFA_def_cfa_offset";
12499 case DW_CFA_def_cfa_expression:
12500 return "DW_CFA_def_cfa_expression";
12501 case DW_CFA_expression:
12502 return "DW_CFA_expression";
12503 case DW_CFA_offset_extended_sf:
12504 return "DW_CFA_offset_extended_sf";
12505 case DW_CFA_def_cfa_sf:
12506 return "DW_CFA_def_cfa_sf";
12507 case DW_CFA_def_cfa_offset_sf:
12508 return "DW_CFA_def_cfa_offset_sf";
12509 case DW_CFA_val_offset:
12510 return "DW_CFA_val_offset";
12511 case DW_CFA_val_offset_sf:
12512 return "DW_CFA_val_offset_sf";
12513 case DW_CFA_val_expression:
12514 return "DW_CFA_val_expression";
12515 /* SGI/MIPS specific. */
12516 case DW_CFA_MIPS_advance_loc8:
12517 return "DW_CFA_MIPS_advance_loc8";
12518 /* GNU extensions. */
12519 case DW_CFA_GNU_window_save:
12520 return "DW_CFA_GNU_window_save";
12521 case DW_CFA_GNU_args_size:
12522 return "DW_CFA_GNU_args_size";
12523 case DW_CFA_GNU_negative_offset_extended:
12524 return "DW_CFA_GNU_negative_offset_extended";
12526 return "DW_CFA_<unknown>";
12532 dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
12536 print_spaces (indent, f);
12537 fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n",
12538 dwarf_tag_name (die->tag), die->abbrev, die->offset);
12540 if (die->parent != NULL)
12542 print_spaces (indent, f);
12543 fprintf_unfiltered (f, " parent at offset: 0x%x\n",
12544 die->parent->offset);
12547 print_spaces (indent, f);
12548 fprintf_unfiltered (f, " has children: %s\n",
12549 dwarf_bool_name (die->child != NULL));
12551 print_spaces (indent, f);
12552 fprintf_unfiltered (f, " attributes:\n");
12554 for (i = 0; i < die->num_attrs; ++i)
12556 print_spaces (indent, f);
12557 fprintf_unfiltered (f, " %s (%s) ",
12558 dwarf_attr_name (die->attrs[i].name),
12559 dwarf_form_name (die->attrs[i].form));
12561 switch (die->attrs[i].form)
12563 case DW_FORM_ref_addr:
12565 fprintf_unfiltered (f, "address: ");
12566 fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f);
12568 case DW_FORM_block2:
12569 case DW_FORM_block4:
12570 case DW_FORM_block:
12571 case DW_FORM_block1:
12572 fprintf_unfiltered (f, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
12574 case DW_FORM_exprloc:
12575 fprintf_unfiltered (f, "expression: size %u",
12576 DW_BLOCK (&die->attrs[i])->size);
12581 fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)",
12582 (long) (DW_ADDR (&die->attrs[i])));
12584 case DW_FORM_data1:
12585 case DW_FORM_data2:
12586 case DW_FORM_data4:
12587 case DW_FORM_data8:
12588 case DW_FORM_udata:
12589 case DW_FORM_sdata:
12590 fprintf_unfiltered (f, "constant: %s",
12591 pulongest (DW_UNSND (&die->attrs[i])));
12593 case DW_FORM_sec_offset:
12594 fprintf_unfiltered (f, "section offset: %s",
12595 pulongest (DW_UNSND (&die->attrs[i])));
12598 if (DW_SIGNATURED_TYPE (&die->attrs[i]) != NULL)
12599 fprintf_unfiltered (f, "signatured type, offset: 0x%x",
12600 DW_SIGNATURED_TYPE (&die->attrs[i])->offset);
12602 fprintf_unfiltered (f, "signatured type, offset: unknown");
12604 case DW_FORM_string:
12606 fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)",
12607 DW_STRING (&die->attrs[i])
12608 ? DW_STRING (&die->attrs[i]) : "",
12609 DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not");
12612 if (DW_UNSND (&die->attrs[i]))
12613 fprintf_unfiltered (f, "flag: TRUE");
12615 fprintf_unfiltered (f, "flag: FALSE");
12617 case DW_FORM_flag_present:
12618 fprintf_unfiltered (f, "flag: TRUE");
12620 case DW_FORM_indirect:
12621 /* the reader will have reduced the indirect form to
12622 the "base form" so this form should not occur */
12623 fprintf_unfiltered (f, "unexpected attribute form: DW_FORM_indirect");
12626 fprintf_unfiltered (f, "unsupported attribute form: %d.",
12627 die->attrs[i].form);
12630 fprintf_unfiltered (f, "\n");
12635 dump_die_for_error (struct die_info *die)
12637 dump_die_shallow (gdb_stderr, 0, die);
12641 dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die)
12643 int indent = level * 4;
12645 gdb_assert (die != NULL);
12647 if (level >= max_level)
12650 dump_die_shallow (f, indent, die);
12652 if (die->child != NULL)
12654 print_spaces (indent, f);
12655 fprintf_unfiltered (f, " Children:");
12656 if (level + 1 < max_level)
12658 fprintf_unfiltered (f, "\n");
12659 dump_die_1 (f, level + 1, max_level, die->child);
12663 fprintf_unfiltered (f, " [not printed, max nesting level reached]\n");
12667 if (die->sibling != NULL && level > 0)
12669 dump_die_1 (f, level, max_level, die->sibling);
12673 /* This is called from the pdie macro in gdbinit.in.
12674 It's not static so gcc will keep a copy callable from gdb. */
12677 dump_die (struct die_info *die, int max_level)
12679 dump_die_1 (gdb_stdlog, 0, max_level, die);
12683 store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu)
12687 slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset, INSERT);
12693 is_ref_attr (struct attribute *attr)
12695 switch (attr->form)
12697 case DW_FORM_ref_addr:
12702 case DW_FORM_ref_udata:
12709 static unsigned int
12710 dwarf2_get_ref_die_offset (struct attribute *attr)
12712 if (is_ref_attr (attr))
12713 return DW_ADDR (attr);
12715 complaint (&symfile_complaints,
12716 _("unsupported die ref attribute form: '%s'"),
12717 dwarf_form_name (attr->form));
12721 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
12722 * the value held by the attribute is not constant. */
12725 dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
12727 if (attr->form == DW_FORM_sdata)
12728 return DW_SND (attr);
12729 else if (attr->form == DW_FORM_udata
12730 || attr->form == DW_FORM_data1
12731 || attr->form == DW_FORM_data2
12732 || attr->form == DW_FORM_data4
12733 || attr->form == DW_FORM_data8)
12734 return DW_UNSND (attr);
12737 complaint (&symfile_complaints, _("Attribute value is not a constant (%s)"),
12738 dwarf_form_name (attr->form));
12739 return default_value;
12743 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
12744 unit and add it to our queue.
12745 The result is non-zero if PER_CU was queued, otherwise the result is zero
12746 meaning either PER_CU is already queued or it is already loaded. */
12749 maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
12750 struct dwarf2_per_cu_data *per_cu)
12752 /* We may arrive here during partial symbol reading, if we need full
12753 DIEs to process an unusual case (e.g. template arguments). Do
12754 not queue PER_CU, just tell our caller to load its DIEs. */
12755 if (dwarf2_per_objfile->reading_partial_symbols)
12757 if (per_cu->cu == NULL || per_cu->cu->dies == NULL)
12762 /* Mark the dependence relation so that we don't flush PER_CU
12764 dwarf2_add_dependence (this_cu, per_cu);
12766 /* If it's already on the queue, we have nothing to do. */
12767 if (per_cu->queued)
12770 /* If the compilation unit is already loaded, just mark it as
12772 if (per_cu->cu != NULL)
12774 per_cu->cu->last_used = 0;
12778 /* Add it to the queue. */
12779 queue_comp_unit (per_cu, this_cu->objfile);
12784 /* Follow reference or signature attribute ATTR of SRC_DIE.
12785 On entry *REF_CU is the CU of SRC_DIE.
12786 On exit *REF_CU is the CU of the result. */
12788 static struct die_info *
12789 follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr,
12790 struct dwarf2_cu **ref_cu)
12792 struct die_info *die;
12794 if (is_ref_attr (attr))
12795 die = follow_die_ref (src_die, attr, ref_cu);
12796 else if (attr->form == DW_FORM_sig8)
12797 die = follow_die_sig (src_die, attr, ref_cu);
12800 dump_die_for_error (src_die);
12801 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
12802 (*ref_cu)->objfile->name);
12808 /* Follow reference OFFSET.
12809 On entry *REF_CU is the CU of the source die referencing OFFSET.
12810 On exit *REF_CU is the CU of the result.
12811 Returns NULL if OFFSET is invalid. */
12813 static struct die_info *
12814 follow_die_offset (unsigned int offset, struct dwarf2_cu **ref_cu)
12816 struct die_info temp_die;
12817 struct dwarf2_cu *target_cu, *cu = *ref_cu;
12819 gdb_assert (cu->per_cu != NULL);
12823 if (cu->per_cu->from_debug_types)
12825 /* .debug_types CUs cannot reference anything outside their CU.
12826 If they need to, they have to reference a signatured type via
12828 if (! offset_in_cu_p (&cu->header, offset))
12831 else if (! offset_in_cu_p (&cu->header, offset))
12833 struct dwarf2_per_cu_data *per_cu;
12835 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
12837 /* If necessary, add it to the queue and load its DIEs. */
12838 if (maybe_queue_comp_unit (cu, per_cu))
12839 load_full_comp_unit (per_cu, cu->objfile);
12841 target_cu = per_cu->cu;
12843 else if (cu->dies == NULL)
12845 /* We're loading full DIEs during partial symbol reading. */
12846 gdb_assert (dwarf2_per_objfile->reading_partial_symbols);
12847 load_full_comp_unit (cu->per_cu, cu->objfile);
12850 *ref_cu = target_cu;
12851 temp_die.offset = offset;
12852 return htab_find_with_hash (target_cu->die_hash, &temp_die, offset);
12855 /* Follow reference attribute ATTR of SRC_DIE.
12856 On entry *REF_CU is the CU of SRC_DIE.
12857 On exit *REF_CU is the CU of the result. */
12859 static struct die_info *
12860 follow_die_ref (struct die_info *src_die, struct attribute *attr,
12861 struct dwarf2_cu **ref_cu)
12863 unsigned int offset = dwarf2_get_ref_die_offset (attr);
12864 struct dwarf2_cu *cu = *ref_cu;
12865 struct die_info *die;
12867 die = follow_die_offset (offset, ref_cu);
12869 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
12870 "at 0x%x [in module %s]"),
12871 offset, src_die->offset, cu->objfile->name);
12876 /* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
12877 value is intended for DW_OP_call*. */
12879 struct dwarf2_locexpr_baton
12880 dwarf2_fetch_die_location_block (unsigned int offset,
12881 struct dwarf2_per_cu_data *per_cu)
12883 struct dwarf2_cu *cu = per_cu->cu;
12884 struct die_info *die;
12885 struct attribute *attr;
12886 struct dwarf2_locexpr_baton retval;
12888 die = follow_die_offset (offset, &cu);
12890 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
12891 offset, per_cu->cu->objfile->name);
12893 attr = dwarf2_attr (die, DW_AT_location, cu);
12896 /* DWARF: "If there is no such attribute, then there is no effect.". */
12898 retval.data = NULL;
12903 if (!attr_form_is_block (attr))
12904 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
12905 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
12906 offset, per_cu->cu->objfile->name);
12908 retval.data = DW_BLOCK (attr)->data;
12909 retval.size = DW_BLOCK (attr)->size;
12911 retval.per_cu = cu->per_cu;
12915 /* Follow the signature attribute ATTR in SRC_DIE.
12916 On entry *REF_CU is the CU of SRC_DIE.
12917 On exit *REF_CU is the CU of the result. */
12919 static struct die_info *
12920 follow_die_sig (struct die_info *src_die, struct attribute *attr,
12921 struct dwarf2_cu **ref_cu)
12923 struct objfile *objfile = (*ref_cu)->objfile;
12924 struct die_info temp_die;
12925 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
12926 struct dwarf2_cu *sig_cu;
12927 struct die_info *die;
12929 /* sig_type will be NULL if the signatured type is missing from
12931 if (sig_type == NULL)
12932 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
12933 "at 0x%x [in module %s]"),
12934 src_die->offset, objfile->name);
12936 /* If necessary, add it to the queue and load its DIEs. */
12938 if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu))
12939 read_signatured_type (objfile, sig_type);
12941 gdb_assert (sig_type->per_cu.cu != NULL);
12943 sig_cu = sig_type->per_cu.cu;
12944 temp_die.offset = sig_cu->header.offset + sig_type->type_offset;
12945 die = htab_find_with_hash (sig_cu->die_hash, &temp_die, temp_die.offset);
12952 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
12953 "at 0x%x [in module %s]"),
12954 sig_type->type_offset, src_die->offset, objfile->name);
12957 /* Given an offset of a signatured type, return its signatured_type. */
12959 static struct signatured_type *
12960 lookup_signatured_type_at_offset (struct objfile *objfile, unsigned int offset)
12962 gdb_byte *info_ptr = dwarf2_per_objfile->types.buffer + offset;
12963 unsigned int length, initial_length_size;
12964 unsigned int sig_offset;
12965 struct signatured_type find_entry, *type_sig;
12967 length = read_initial_length (objfile->obfd, info_ptr, &initial_length_size);
12968 sig_offset = (initial_length_size
12970 + (initial_length_size == 4 ? 4 : 8) /*debug_abbrev_offset*/
12971 + 1 /*address_size*/);
12972 find_entry.signature = bfd_get_64 (objfile->obfd, info_ptr + sig_offset);
12973 type_sig = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
12975 /* This is only used to lookup previously recorded types.
12976 If we didn't find it, it's our bug. */
12977 gdb_assert (type_sig != NULL);
12978 gdb_assert (offset == type_sig->offset);
12983 /* Read in signatured type at OFFSET and build its CU and die(s). */
12986 read_signatured_type_at_offset (struct objfile *objfile,
12987 unsigned int offset)
12989 struct signatured_type *type_sig;
12991 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
12993 /* We have the section offset, but we need the signature to do the
12994 hash table lookup. */
12995 type_sig = lookup_signatured_type_at_offset (objfile, offset);
12997 gdb_assert (type_sig->per_cu.cu == NULL);
12999 read_signatured_type (objfile, type_sig);
13001 gdb_assert (type_sig->per_cu.cu != NULL);
13004 /* Read in a signatured type and build its CU and DIEs. */
13007 read_signatured_type (struct objfile *objfile,
13008 struct signatured_type *type_sig)
13010 gdb_byte *types_ptr;
13011 struct die_reader_specs reader_specs;
13012 struct dwarf2_cu *cu;
13013 ULONGEST signature;
13014 struct cleanup *back_to, *free_cu_cleanup;
13015 struct attribute *attr;
13017 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
13018 types_ptr = dwarf2_per_objfile->types.buffer + type_sig->offset;
13020 gdb_assert (type_sig->per_cu.cu == NULL);
13022 cu = xmalloc (sizeof (struct dwarf2_cu));
13023 memset (cu, 0, sizeof (struct dwarf2_cu));
13024 obstack_init (&cu->comp_unit_obstack);
13025 cu->objfile = objfile;
13026 type_sig->per_cu.cu = cu;
13027 cu->per_cu = &type_sig->per_cu;
13029 /* If an error occurs while loading, release our storage. */
13030 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
13032 types_ptr = read_type_comp_unit_head (&cu->header, &signature,
13033 types_ptr, objfile->obfd);
13034 gdb_assert (signature == type_sig->signature);
13037 = htab_create_alloc_ex (cu->header.length / 12,
13041 &cu->comp_unit_obstack,
13042 hashtab_obstack_allocate,
13043 dummy_obstack_deallocate);
13045 dwarf2_read_abbrevs (cu->objfile->obfd, cu);
13046 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
13048 init_cu_die_reader (&reader_specs, cu);
13050 cu->dies = read_die_and_children (&reader_specs, types_ptr, &types_ptr,
13053 /* We try not to read any attributes in this function, because not
13054 all objfiles needed for references have been loaded yet, and symbol
13055 table processing isn't initialized. But we have to set the CU language,
13056 or we won't be able to build types correctly. */
13057 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
13059 set_cu_language (DW_UNSND (attr), cu);
13061 set_cu_language (language_minimal, cu);
13063 do_cleanups (back_to);
13065 /* We've successfully allocated this compilation unit. Let our caller
13066 clean it up when finished with it. */
13067 discard_cleanups (free_cu_cleanup);
13069 type_sig->per_cu.cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
13070 dwarf2_per_objfile->read_in_chain = &type_sig->per_cu;
13073 /* Decode simple location descriptions.
13074 Given a pointer to a dwarf block that defines a location, compute
13075 the location and return the value.
13077 NOTE drow/2003-11-18: This function is called in two situations
13078 now: for the address of static or global variables (partial symbols
13079 only) and for offsets into structures which are expected to be
13080 (more or less) constant. The partial symbol case should go away,
13081 and only the constant case should remain. That will let this
13082 function complain more accurately. A few special modes are allowed
13083 without complaint for global variables (for instance, global
13084 register values and thread-local values).
13086 A location description containing no operations indicates that the
13087 object is optimized out. The return value is 0 for that case.
13088 FIXME drow/2003-11-16: No callers check for this case any more; soon all
13089 callers will only want a very basic result and this can become a
13092 Note that stack[0] is unused except as a default error return.
13093 Note that stack overflow is not yet handled. */
13096 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
13098 struct objfile *objfile = cu->objfile;
13100 int size = blk->size;
13101 gdb_byte *data = blk->data;
13102 CORE_ADDR stack[64];
13104 unsigned int bytes_read, unsnd;
13148 stack[++stacki] = op - DW_OP_lit0;
13183 stack[++stacki] = op - DW_OP_reg0;
13185 dwarf2_complex_location_expr_complaint ();
13189 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
13191 stack[++stacki] = unsnd;
13193 dwarf2_complex_location_expr_complaint ();
13197 stack[++stacki] = read_address (objfile->obfd, &data[i],
13202 case DW_OP_const1u:
13203 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
13207 case DW_OP_const1s:
13208 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
13212 case DW_OP_const2u:
13213 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
13217 case DW_OP_const2s:
13218 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
13222 case DW_OP_const4u:
13223 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
13227 case DW_OP_const4s:
13228 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
13233 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
13239 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
13244 stack[stacki + 1] = stack[stacki];
13249 stack[stacki - 1] += stack[stacki];
13253 case DW_OP_plus_uconst:
13254 stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
13259 stack[stacki - 1] -= stack[stacki];
13264 /* If we're not the last op, then we definitely can't encode
13265 this using GDB's address_class enum. This is valid for partial
13266 global symbols, although the variable's address will be bogus
13269 dwarf2_complex_location_expr_complaint ();
13272 case DW_OP_GNU_push_tls_address:
13273 /* The top of the stack has the offset from the beginning
13274 of the thread control block at which the variable is located. */
13275 /* Nothing should follow this operator, so the top of stack would
13277 /* This is valid for partial global symbols, but the variable's
13278 address will be bogus in the psymtab. */
13280 dwarf2_complex_location_expr_complaint ();
13283 case DW_OP_GNU_uninit:
13287 complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
13288 dwarf_stack_op_name (op, 1));
13289 return (stack[stacki]);
13292 return (stack[stacki]);
13295 /* memory allocation interface */
13297 static struct dwarf_block *
13298 dwarf_alloc_block (struct dwarf2_cu *cu)
13300 struct dwarf_block *blk;
13302 blk = (struct dwarf_block *)
13303 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
13307 static struct abbrev_info *
13308 dwarf_alloc_abbrev (struct dwarf2_cu *cu)
13310 struct abbrev_info *abbrev;
13312 abbrev = (struct abbrev_info *)
13313 obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info));
13314 memset (abbrev, 0, sizeof (struct abbrev_info));
13318 static struct die_info *
13319 dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs)
13321 struct die_info *die;
13322 size_t size = sizeof (struct die_info);
13325 size += (num_attrs - 1) * sizeof (struct attribute);
13327 die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size);
13328 memset (die, 0, sizeof (struct die_info));
13333 /* Macro support. */
13336 /* Return the full name of file number I in *LH's file name table.
13337 Use COMP_DIR as the name of the current directory of the
13338 compilation. The result is allocated using xmalloc; the caller is
13339 responsible for freeing it. */
13341 file_full_name (int file, struct line_header *lh, const char *comp_dir)
13343 /* Is the file number a valid index into the line header's file name
13344 table? Remember that file numbers start with one, not zero. */
13345 if (1 <= file && file <= lh->num_file_names)
13347 struct file_entry *fe = &lh->file_names[file - 1];
13349 if (IS_ABSOLUTE_PATH (fe->name))
13350 return xstrdup (fe->name);
13358 dir = lh->include_dirs[fe->dir_index - 1];
13364 dir_len = strlen (dir);
13365 full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
13366 strcpy (full_name, dir);
13367 full_name[dir_len] = '/';
13368 strcpy (full_name + dir_len + 1, fe->name);
13372 return xstrdup (fe->name);
13377 /* The compiler produced a bogus file number. We can at least
13378 record the macro definitions made in the file, even if we
13379 won't be able to find the file by name. */
13380 char fake_name[80];
13382 sprintf (fake_name, "<bad macro file number %d>", file);
13384 complaint (&symfile_complaints,
13385 _("bad file number in macro information (%d)"),
13388 return xstrdup (fake_name);
13393 static struct macro_source_file *
13394 macro_start_file (int file, int line,
13395 struct macro_source_file *current_file,
13396 const char *comp_dir,
13397 struct line_header *lh, struct objfile *objfile)
13399 /* The full name of this source file. */
13400 char *full_name = file_full_name (file, lh, comp_dir);
13402 /* We don't create a macro table for this compilation unit
13403 at all until we actually get a filename. */
13404 if (! pending_macros)
13405 pending_macros = new_macro_table (&objfile->objfile_obstack,
13406 objfile->macro_cache);
13408 if (! current_file)
13409 /* If we have no current file, then this must be the start_file
13410 directive for the compilation unit's main source file. */
13411 current_file = macro_set_main (pending_macros, full_name);
13413 current_file = macro_include (current_file, line, full_name);
13417 return current_file;
13421 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
13422 followed by a null byte. */
13424 copy_string (const char *buf, int len)
13426 char *s = xmalloc (len + 1);
13428 memcpy (s, buf, len);
13434 static const char *
13435 consume_improper_spaces (const char *p, const char *body)
13439 complaint (&symfile_complaints,
13440 _("macro definition contains spaces in formal argument list:\n`%s'"),
13452 parse_macro_definition (struct macro_source_file *file, int line,
13457 /* The body string takes one of two forms. For object-like macro
13458 definitions, it should be:
13460 <macro name> " " <definition>
13462 For function-like macro definitions, it should be:
13464 <macro name> "() " <definition>
13466 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
13468 Spaces may appear only where explicitly indicated, and in the
13471 The Dwarf 2 spec says that an object-like macro's name is always
13472 followed by a space, but versions of GCC around March 2002 omit
13473 the space when the macro's definition is the empty string.
13475 The Dwarf 2 spec says that there should be no spaces between the
13476 formal arguments in a function-like macro's formal argument list,
13477 but versions of GCC around March 2002 include spaces after the
13481 /* Find the extent of the macro name. The macro name is terminated
13482 by either a space or null character (for an object-like macro) or
13483 an opening paren (for a function-like macro). */
13484 for (p = body; *p; p++)
13485 if (*p == ' ' || *p == '(')
13488 if (*p == ' ' || *p == '\0')
13490 /* It's an object-like macro. */
13491 int name_len = p - body;
13492 char *name = copy_string (body, name_len);
13493 const char *replacement;
13496 replacement = body + name_len + 1;
13499 dwarf2_macro_malformed_definition_complaint (body);
13500 replacement = body + name_len;
13503 macro_define_object (file, line, name, replacement);
13507 else if (*p == '(')
13509 /* It's a function-like macro. */
13510 char *name = copy_string (body, p - body);
13513 char **argv = xmalloc (argv_size * sizeof (*argv));
13517 p = consume_improper_spaces (p, body);
13519 /* Parse the formal argument list. */
13520 while (*p && *p != ')')
13522 /* Find the extent of the current argument name. */
13523 const char *arg_start = p;
13525 while (*p && *p != ',' && *p != ')' && *p != ' ')
13528 if (! *p || p == arg_start)
13529 dwarf2_macro_malformed_definition_complaint (body);
13532 /* Make sure argv has room for the new argument. */
13533 if (argc >= argv_size)
13536 argv = xrealloc (argv, argv_size * sizeof (*argv));
13539 argv[argc++] = copy_string (arg_start, p - arg_start);
13542 p = consume_improper_spaces (p, body);
13544 /* Consume the comma, if present. */
13549 p = consume_improper_spaces (p, body);
13558 /* Perfectly formed definition, no complaints. */
13559 macro_define_function (file, line, name,
13560 argc, (const char **) argv,
13562 else if (*p == '\0')
13564 /* Complain, but do define it. */
13565 dwarf2_macro_malformed_definition_complaint (body);
13566 macro_define_function (file, line, name,
13567 argc, (const char **) argv,
13571 /* Just complain. */
13572 dwarf2_macro_malformed_definition_complaint (body);
13575 /* Just complain. */
13576 dwarf2_macro_malformed_definition_complaint (body);
13582 for (i = 0; i < argc; i++)
13588 dwarf2_macro_malformed_definition_complaint (body);
13593 dwarf_decode_macros (struct line_header *lh, unsigned int offset,
13594 char *comp_dir, bfd *abfd,
13595 struct dwarf2_cu *cu)
13597 gdb_byte *mac_ptr, *mac_end;
13598 struct macro_source_file *current_file = 0;
13599 enum dwarf_macinfo_record_type macinfo_type;
13600 int at_commandline;
13602 dwarf2_read_section (dwarf2_per_objfile->objfile,
13603 &dwarf2_per_objfile->macinfo);
13604 if (dwarf2_per_objfile->macinfo.buffer == NULL)
13606 complaint (&symfile_complaints, _("missing .debug_macinfo section"));
13610 /* First pass: Find the name of the base filename.
13611 This filename is needed in order to process all macros whose definition
13612 (or undefinition) comes from the command line. These macros are defined
13613 before the first DW_MACINFO_start_file entry, and yet still need to be
13614 associated to the base file.
13616 To determine the base file name, we scan the macro definitions until we
13617 reach the first DW_MACINFO_start_file entry. We then initialize
13618 CURRENT_FILE accordingly so that any macro definition found before the
13619 first DW_MACINFO_start_file can still be associated to the base file. */
13621 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
13622 mac_end = dwarf2_per_objfile->macinfo.buffer
13623 + dwarf2_per_objfile->macinfo.size;
13627 /* Do we at least have room for a macinfo type byte? */
13628 if (mac_ptr >= mac_end)
13630 /* Complaint is printed during the second pass as GDB will probably
13631 stop the first pass earlier upon finding DW_MACINFO_start_file. */
13635 macinfo_type = read_1_byte (abfd, mac_ptr);
13638 switch (macinfo_type)
13640 /* A zero macinfo type indicates the end of the macro
13645 case DW_MACINFO_define:
13646 case DW_MACINFO_undef:
13647 /* Only skip the data by MAC_PTR. */
13649 unsigned int bytes_read;
13651 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13652 mac_ptr += bytes_read;
13653 read_direct_string (abfd, mac_ptr, &bytes_read);
13654 mac_ptr += bytes_read;
13658 case DW_MACINFO_start_file:
13660 unsigned int bytes_read;
13663 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13664 mac_ptr += bytes_read;
13665 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13666 mac_ptr += bytes_read;
13668 current_file = macro_start_file (file, line, current_file, comp_dir,
13673 case DW_MACINFO_end_file:
13674 /* No data to skip by MAC_PTR. */
13677 case DW_MACINFO_vendor_ext:
13678 /* Only skip the data by MAC_PTR. */
13680 unsigned int bytes_read;
13682 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13683 mac_ptr += bytes_read;
13684 read_direct_string (abfd, mac_ptr, &bytes_read);
13685 mac_ptr += bytes_read;
13692 } while (macinfo_type != 0 && current_file == NULL);
13694 /* Second pass: Process all entries.
13696 Use the AT_COMMAND_LINE flag to determine whether we are still processing
13697 command-line macro definitions/undefinitions. This flag is unset when we
13698 reach the first DW_MACINFO_start_file entry. */
13700 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
13702 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
13703 GDB is still reading the definitions from command line. First
13704 DW_MACINFO_start_file will need to be ignored as it was already executed
13705 to create CURRENT_FILE for the main source holding also the command line
13706 definitions. On first met DW_MACINFO_start_file this flag is reset to
13707 normally execute all the remaining DW_MACINFO_start_file macinfos. */
13709 at_commandline = 1;
13713 /* Do we at least have room for a macinfo type byte? */
13714 if (mac_ptr >= mac_end)
13716 dwarf2_macros_too_long_complaint ();
13720 macinfo_type = read_1_byte (abfd, mac_ptr);
13723 switch (macinfo_type)
13725 /* A zero macinfo type indicates the end of the macro
13730 case DW_MACINFO_define:
13731 case DW_MACINFO_undef:
13733 unsigned int bytes_read;
13737 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13738 mac_ptr += bytes_read;
13739 body = read_direct_string (abfd, mac_ptr, &bytes_read);
13740 mac_ptr += bytes_read;
13742 if (! current_file)
13744 /* DWARF violation as no main source is present. */
13745 complaint (&symfile_complaints,
13746 _("debug info with no main source gives macro %s "
13748 macinfo_type == DW_MACINFO_define ?
13750 macinfo_type == DW_MACINFO_undef ?
13751 _("undefinition") :
13752 _("something-or-other"), line, body);
13755 if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
13756 complaint (&symfile_complaints,
13757 _("debug info gives %s macro %s with %s line %d: %s"),
13758 at_commandline ? _("command-line") : _("in-file"),
13759 macinfo_type == DW_MACINFO_define ?
13761 macinfo_type == DW_MACINFO_undef ?
13762 _("undefinition") :
13763 _("something-or-other"),
13764 line == 0 ? _("zero") : _("non-zero"), line, body);
13766 if (macinfo_type == DW_MACINFO_define)
13767 parse_macro_definition (current_file, line, body);
13768 else if (macinfo_type == DW_MACINFO_undef)
13769 macro_undef (current_file, line, body);
13773 case DW_MACINFO_start_file:
13775 unsigned int bytes_read;
13778 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13779 mac_ptr += bytes_read;
13780 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13781 mac_ptr += bytes_read;
13783 if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
13784 complaint (&symfile_complaints,
13785 _("debug info gives source %d included "
13786 "from %s at %s line %d"),
13787 file, at_commandline ? _("command-line") : _("file"),
13788 line == 0 ? _("zero") : _("non-zero"), line);
13790 if (at_commandline)
13792 /* This DW_MACINFO_start_file was executed in the pass one. */
13793 at_commandline = 0;
13796 current_file = macro_start_file (file, line,
13797 current_file, comp_dir,
13802 case DW_MACINFO_end_file:
13803 if (! current_file)
13804 complaint (&symfile_complaints,
13805 _("macro debug info has an unmatched `close_file' directive"));
13808 current_file = current_file->included_by;
13809 if (! current_file)
13811 enum dwarf_macinfo_record_type next_type;
13813 /* GCC circa March 2002 doesn't produce the zero
13814 type byte marking the end of the compilation
13815 unit. Complain if it's not there, but exit no
13818 /* Do we at least have room for a macinfo type byte? */
13819 if (mac_ptr >= mac_end)
13821 dwarf2_macros_too_long_complaint ();
13825 /* We don't increment mac_ptr here, so this is just
13827 next_type = read_1_byte (abfd, mac_ptr);
13828 if (next_type != 0)
13829 complaint (&symfile_complaints,
13830 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
13837 case DW_MACINFO_vendor_ext:
13839 unsigned int bytes_read;
13843 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
13844 mac_ptr += bytes_read;
13845 string = read_direct_string (abfd, mac_ptr, &bytes_read);
13846 mac_ptr += bytes_read;
13848 /* We don't recognize any vendor extensions. */
13852 } while (macinfo_type != 0);
13855 /* Check if the attribute's form is a DW_FORM_block*
13856 if so return true else false. */
13858 attr_form_is_block (struct attribute *attr)
13860 return (attr == NULL ? 0 :
13861 attr->form == DW_FORM_block1
13862 || attr->form == DW_FORM_block2
13863 || attr->form == DW_FORM_block4
13864 || attr->form == DW_FORM_block
13865 || attr->form == DW_FORM_exprloc);
13868 /* Return non-zero if ATTR's value is a section offset --- classes
13869 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
13870 You may use DW_UNSND (attr) to retrieve such offsets.
13872 Section 7.5.4, "Attribute Encodings", explains that no attribute
13873 may have a value that belongs to more than one of these classes; it
13874 would be ambiguous if we did, because we use the same forms for all
13877 attr_form_is_section_offset (struct attribute *attr)
13879 return (attr->form == DW_FORM_data4
13880 || attr->form == DW_FORM_data8
13881 || attr->form == DW_FORM_sec_offset);
13885 /* Return non-zero if ATTR's value falls in the 'constant' class, or
13886 zero otherwise. When this function returns true, you can apply
13887 dwarf2_get_attr_constant_value to it.
13889 However, note that for some attributes you must check
13890 attr_form_is_section_offset before using this test. DW_FORM_data4
13891 and DW_FORM_data8 are members of both the constant class, and of
13892 the classes that contain offsets into other debug sections
13893 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
13894 that, if an attribute's can be either a constant or one of the
13895 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
13896 taken as section offsets, not constants. */
13898 attr_form_is_constant (struct attribute *attr)
13900 switch (attr->form)
13902 case DW_FORM_sdata:
13903 case DW_FORM_udata:
13904 case DW_FORM_data1:
13905 case DW_FORM_data2:
13906 case DW_FORM_data4:
13907 case DW_FORM_data8:
13915 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
13916 struct dwarf2_cu *cu)
13918 if (attr_form_is_section_offset (attr)
13919 /* ".debug_loc" may not exist at all, or the offset may be outside
13920 the section. If so, fall through to the complaint in the
13922 && DW_UNSND (attr) < dwarf2_per_objfile->loc.size)
13924 struct dwarf2_loclist_baton *baton;
13926 baton = obstack_alloc (&cu->objfile->objfile_obstack,
13927 sizeof (struct dwarf2_loclist_baton));
13928 baton->per_cu = cu->per_cu;
13929 gdb_assert (baton->per_cu);
13931 dwarf2_read_section (dwarf2_per_objfile->objfile,
13932 &dwarf2_per_objfile->loc);
13934 /* We don't know how long the location list is, but make sure we
13935 don't run off the edge of the section. */
13936 baton->size = dwarf2_per_objfile->loc.size - DW_UNSND (attr);
13937 baton->data = dwarf2_per_objfile->loc.buffer + DW_UNSND (attr);
13938 baton->base_address = cu->base_address;
13939 if (cu->base_known == 0)
13940 complaint (&symfile_complaints,
13941 _("Location list used without specifying the CU base address."));
13943 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_loclist_funcs;
13944 SYMBOL_LOCATION_BATON (sym) = baton;
13948 struct dwarf2_locexpr_baton *baton;
13950 baton = obstack_alloc (&cu->objfile->objfile_obstack,
13951 sizeof (struct dwarf2_locexpr_baton));
13952 baton->per_cu = cu->per_cu;
13953 gdb_assert (baton->per_cu);
13955 if (attr_form_is_block (attr))
13957 /* Note that we're just copying the block's data pointer
13958 here, not the actual data. We're still pointing into the
13959 info_buffer for SYM's objfile; right now we never release
13960 that buffer, but when we do clean up properly this may
13962 baton->size = DW_BLOCK (attr)->size;
13963 baton->data = DW_BLOCK (attr)->data;
13967 dwarf2_invalid_attrib_class_complaint ("location description",
13968 SYMBOL_NATURAL_NAME (sym));
13970 baton->data = NULL;
13973 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
13974 SYMBOL_LOCATION_BATON (sym) = baton;
13978 /* Return the OBJFILE associated with the compilation unit CU. If CU
13979 came from a separate debuginfo file, then the master objfile is
13983 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu)
13985 struct objfile *objfile = per_cu->objfile;
13987 /* Return the master objfile, so that we can report and look up the
13988 correct file containing this variable. */
13989 if (objfile->separate_debug_objfile_backlink)
13990 objfile = objfile->separate_debug_objfile_backlink;
13995 /* Return the address size given in the compilation unit header for CU. */
13998 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu)
14001 return per_cu->cu->header.addr_size;
14004 /* If the CU is not currently read in, we re-read its header. */
14005 struct objfile *objfile = per_cu->objfile;
14006 struct dwarf2_per_objfile *per_objfile
14007 = objfile_data (objfile, dwarf2_objfile_data_key);
14008 gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
14009 struct comp_unit_head cu_header;
14011 memset (&cu_header, 0, sizeof cu_header);
14012 read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
14013 return cu_header.addr_size;
14017 /* Return the offset size given in the compilation unit header for CU. */
14020 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu)
14023 return per_cu->cu->header.offset_size;
14026 /* If the CU is not currently read in, we re-read its header. */
14027 struct objfile *objfile = per_cu->objfile;
14028 struct dwarf2_per_objfile *per_objfile
14029 = objfile_data (objfile, dwarf2_objfile_data_key);
14030 gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
14031 struct comp_unit_head cu_header;
14033 memset (&cu_header, 0, sizeof cu_header);
14034 read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
14035 return cu_header.offset_size;
14039 /* Return the text offset of the CU. The returned offset comes from
14040 this CU's objfile. If this objfile came from a separate debuginfo
14041 file, then the offset may be different from the corresponding
14042 offset in the parent objfile. */
14045 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu)
14047 struct objfile *objfile = per_cu->objfile;
14049 return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
14052 /* Locate the .debug_info compilation unit from CU's objfile which contains
14053 the DIE at OFFSET. Raises an error on failure. */
14055 static struct dwarf2_per_cu_data *
14056 dwarf2_find_containing_comp_unit (unsigned int offset,
14057 struct objfile *objfile)
14059 struct dwarf2_per_cu_data *this_cu;
14063 high = dwarf2_per_objfile->n_comp_units - 1;
14066 int mid = low + (high - low) / 2;
14068 if (dwarf2_per_objfile->all_comp_units[mid]->offset >= offset)
14073 gdb_assert (low == high);
14074 if (dwarf2_per_objfile->all_comp_units[low]->offset > offset)
14077 error (_("Dwarf Error: could not find partial DIE containing "
14078 "offset 0x%lx [in module %s]"),
14079 (long) offset, bfd_get_filename (objfile->obfd));
14081 gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset <= offset);
14082 return dwarf2_per_objfile->all_comp_units[low-1];
14086 this_cu = dwarf2_per_objfile->all_comp_units[low];
14087 if (low == dwarf2_per_objfile->n_comp_units - 1
14088 && offset >= this_cu->offset + this_cu->length)
14089 error (_("invalid dwarf2 offset %u"), offset);
14090 gdb_assert (offset < this_cu->offset + this_cu->length);
14095 /* Locate the compilation unit from OBJFILE which is located at exactly
14096 OFFSET. Raises an error on failure. */
14098 static struct dwarf2_per_cu_data *
14099 dwarf2_find_comp_unit (unsigned int offset, struct objfile *objfile)
14101 struct dwarf2_per_cu_data *this_cu;
14103 this_cu = dwarf2_find_containing_comp_unit (offset, objfile);
14104 if (this_cu->offset != offset)
14105 error (_("no compilation unit with offset %u."), offset);
14109 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
14111 static struct dwarf2_cu *
14112 alloc_one_comp_unit (struct objfile *objfile)
14114 struct dwarf2_cu *cu = xcalloc (1, sizeof (struct dwarf2_cu));
14115 cu->objfile = objfile;
14116 obstack_init (&cu->comp_unit_obstack);
14120 /* Release one cached compilation unit, CU. We unlink it from the tree
14121 of compilation units, but we don't remove it from the read_in_chain;
14122 the caller is responsible for that.
14123 NOTE: DATA is a void * because this function is also used as a
14124 cleanup routine. */
14127 free_one_comp_unit (void *data)
14129 struct dwarf2_cu *cu = data;
14131 if (cu->per_cu != NULL)
14132 cu->per_cu->cu = NULL;
14135 obstack_free (&cu->comp_unit_obstack, NULL);
14140 /* This cleanup function is passed the address of a dwarf2_cu on the stack
14141 when we're finished with it. We can't free the pointer itself, but be
14142 sure to unlink it from the cache. Also release any associated storage
14143 and perform cache maintenance.
14145 Only used during partial symbol parsing. */
14148 free_stack_comp_unit (void *data)
14150 struct dwarf2_cu *cu = data;
14152 obstack_free (&cu->comp_unit_obstack, NULL);
14153 cu->partial_dies = NULL;
14155 if (cu->per_cu != NULL)
14157 /* This compilation unit is on the stack in our caller, so we
14158 should not xfree it. Just unlink it. */
14159 cu->per_cu->cu = NULL;
14162 /* If we had a per-cu pointer, then we may have other compilation
14163 units loaded, so age them now. */
14164 age_cached_comp_units ();
14168 /* Free all cached compilation units. */
14171 free_cached_comp_units (void *data)
14173 struct dwarf2_per_cu_data *per_cu, **last_chain;
14175 per_cu = dwarf2_per_objfile->read_in_chain;
14176 last_chain = &dwarf2_per_objfile->read_in_chain;
14177 while (per_cu != NULL)
14179 struct dwarf2_per_cu_data *next_cu;
14181 next_cu = per_cu->cu->read_in_chain;
14183 free_one_comp_unit (per_cu->cu);
14184 *last_chain = next_cu;
14190 /* Increase the age counter on each cached compilation unit, and free
14191 any that are too old. */
14194 age_cached_comp_units (void)
14196 struct dwarf2_per_cu_data *per_cu, **last_chain;
14198 dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
14199 per_cu = dwarf2_per_objfile->read_in_chain;
14200 while (per_cu != NULL)
14202 per_cu->cu->last_used ++;
14203 if (per_cu->cu->last_used <= dwarf2_max_cache_age)
14204 dwarf2_mark (per_cu->cu);
14205 per_cu = per_cu->cu->read_in_chain;
14208 per_cu = dwarf2_per_objfile->read_in_chain;
14209 last_chain = &dwarf2_per_objfile->read_in_chain;
14210 while (per_cu != NULL)
14212 struct dwarf2_per_cu_data *next_cu;
14214 next_cu = per_cu->cu->read_in_chain;
14216 if (!per_cu->cu->mark)
14218 free_one_comp_unit (per_cu->cu);
14219 *last_chain = next_cu;
14222 last_chain = &per_cu->cu->read_in_chain;
14228 /* Remove a single compilation unit from the cache. */
14231 free_one_cached_comp_unit (void *target_cu)
14233 struct dwarf2_per_cu_data *per_cu, **last_chain;
14235 per_cu = dwarf2_per_objfile->read_in_chain;
14236 last_chain = &dwarf2_per_objfile->read_in_chain;
14237 while (per_cu != NULL)
14239 struct dwarf2_per_cu_data *next_cu;
14241 next_cu = per_cu->cu->read_in_chain;
14243 if (per_cu->cu == target_cu)
14245 free_one_comp_unit (per_cu->cu);
14246 *last_chain = next_cu;
14250 last_chain = &per_cu->cu->read_in_chain;
14256 /* Release all extra memory associated with OBJFILE. */
14259 dwarf2_free_objfile (struct objfile *objfile)
14261 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
14263 if (dwarf2_per_objfile == NULL)
14266 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
14267 free_cached_comp_units (NULL);
14269 if (dwarf2_per_objfile->using_index)
14273 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
14276 struct dwarf2_per_cu_data *per_cu =
14277 dwarf2_per_objfile->all_comp_units[i];
14279 if (!per_cu->v.quick->lines)
14282 for (j = 0; j < per_cu->v.quick->lines->num_file_names; ++j)
14284 if (per_cu->v.quick->file_names)
14285 xfree ((void *) per_cu->v.quick->file_names[j]);
14286 if (per_cu->v.quick->full_names)
14287 xfree ((void *) per_cu->v.quick->full_names[j]);
14290 free_line_header (per_cu->v.quick->lines);
14294 /* Everything else should be on the objfile obstack. */
14297 /* A pair of DIE offset and GDB type pointer. We store these
14298 in a hash table separate from the DIEs, and preserve them
14299 when the DIEs are flushed out of cache. */
14301 struct dwarf2_offset_and_type
14303 unsigned int offset;
14307 /* Hash function for a dwarf2_offset_and_type. */
14310 offset_and_type_hash (const void *item)
14312 const struct dwarf2_offset_and_type *ofs = item;
14314 return ofs->offset;
14317 /* Equality function for a dwarf2_offset_and_type. */
14320 offset_and_type_eq (const void *item_lhs, const void *item_rhs)
14322 const struct dwarf2_offset_and_type *ofs_lhs = item_lhs;
14323 const struct dwarf2_offset_and_type *ofs_rhs = item_rhs;
14325 return ofs_lhs->offset == ofs_rhs->offset;
14328 /* Set the type associated with DIE to TYPE. Save it in CU's hash
14329 table if necessary. For convenience, return TYPE.
14331 The DIEs reading must have careful ordering to:
14332 * Not cause infite loops trying to read in DIEs as a prerequisite for
14333 reading current DIE.
14334 * Not trying to dereference contents of still incompletely read in types
14335 while reading in other DIEs.
14336 * Enable referencing still incompletely read in types just by a pointer to
14337 the type without accessing its fields.
14339 Therefore caller should follow these rules:
14340 * Try to fetch any prerequisite types we may need to build this DIE type
14341 before building the type and calling set_die_type.
14342 * After building type call set_die_type for current DIE as soon as
14343 possible before fetching more types to complete the current type.
14344 * Make the type as complete as possible before fetching more types. */
14346 static struct type *
14347 set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
14349 struct dwarf2_offset_and_type **slot, ofs;
14350 struct objfile *objfile = cu->objfile;
14351 htab_t *type_hash_ptr;
14353 /* For Ada types, make sure that the gnat-specific data is always
14354 initialized (if not already set). There are a few types where
14355 we should not be doing so, because the type-specific area is
14356 already used to hold some other piece of info (eg: TYPE_CODE_FLT
14357 where the type-specific area is used to store the floatformat).
14358 But this is not a problem, because the gnat-specific information
14359 is actually not needed for these types. */
14360 if (need_gnat_info (cu)
14361 && TYPE_CODE (type) != TYPE_CODE_FUNC
14362 && TYPE_CODE (type) != TYPE_CODE_FLT
14363 && !HAVE_GNAT_AUX_INFO (type))
14364 INIT_GNAT_SPECIFIC (type);
14366 if (cu->per_cu->from_debug_types)
14367 type_hash_ptr = &dwarf2_per_objfile->debug_types_type_hash;
14369 type_hash_ptr = &dwarf2_per_objfile->debug_info_type_hash;
14371 if (*type_hash_ptr == NULL)
14374 = htab_create_alloc_ex (127,
14375 offset_and_type_hash,
14376 offset_and_type_eq,
14378 &objfile->objfile_obstack,
14379 hashtab_obstack_allocate,
14380 dummy_obstack_deallocate);
14383 ofs.offset = die->offset;
14385 slot = (struct dwarf2_offset_and_type **)
14386 htab_find_slot_with_hash (*type_hash_ptr, &ofs, ofs.offset, INSERT);
14388 complaint (&symfile_complaints,
14389 _("A problem internal to GDB: DIE 0x%x has type already set"),
14391 *slot = obstack_alloc (&objfile->objfile_obstack, sizeof (**slot));
14396 /* Look up the type for the die at DIE_OFFSET in the appropriate type_hash
14397 table, or return NULL if the die does not have a saved type. */
14399 static struct type *
14400 get_die_type_at_offset (unsigned int offset,
14401 struct dwarf2_per_cu_data *per_cu)
14403 struct dwarf2_offset_and_type *slot, ofs;
14406 if (per_cu->from_debug_types)
14407 type_hash = dwarf2_per_objfile->debug_types_type_hash;
14409 type_hash = dwarf2_per_objfile->debug_info_type_hash;
14410 if (type_hash == NULL)
14413 ofs.offset = offset;
14414 slot = htab_find_with_hash (type_hash, &ofs, ofs.offset);
14421 /* Look up the type for DIE in the appropriate type_hash table,
14422 or return NULL if DIE does not have a saved type. */
14424 static struct type *
14425 get_die_type (struct die_info *die, struct dwarf2_cu *cu)
14427 return get_die_type_at_offset (die->offset, cu->per_cu);
14430 /* Add a dependence relationship from CU to REF_PER_CU. */
14433 dwarf2_add_dependence (struct dwarf2_cu *cu,
14434 struct dwarf2_per_cu_data *ref_per_cu)
14438 if (cu->dependencies == NULL)
14440 = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
14441 NULL, &cu->comp_unit_obstack,
14442 hashtab_obstack_allocate,
14443 dummy_obstack_deallocate);
14445 slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
14447 *slot = ref_per_cu;
14450 /* Subroutine of dwarf2_mark to pass to htab_traverse.
14451 Set the mark field in every compilation unit in the
14452 cache that we must keep because we are keeping CU. */
14455 dwarf2_mark_helper (void **slot, void *data)
14457 struct dwarf2_per_cu_data *per_cu;
14459 per_cu = (struct dwarf2_per_cu_data *) *slot;
14460 if (per_cu->cu->mark)
14462 per_cu->cu->mark = 1;
14464 if (per_cu->cu->dependencies != NULL)
14465 htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
14470 /* Set the mark field in CU and in every other compilation unit in the
14471 cache that we must keep because we are keeping CU. */
14474 dwarf2_mark (struct dwarf2_cu *cu)
14479 if (cu->dependencies != NULL)
14480 htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
14484 dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
14488 per_cu->cu->mark = 0;
14489 per_cu = per_cu->cu->read_in_chain;
14493 /* Trivial hash function for partial_die_info: the hash value of a DIE
14494 is its offset in .debug_info for this objfile. */
14497 partial_die_hash (const void *item)
14499 const struct partial_die_info *part_die = item;
14501 return part_die->offset;
14504 /* Trivial comparison function for partial_die_info structures: two DIEs
14505 are equal if they have the same offset. */
14508 partial_die_eq (const void *item_lhs, const void *item_rhs)
14510 const struct partial_die_info *part_die_lhs = item_lhs;
14511 const struct partial_die_info *part_die_rhs = item_rhs;
14513 return part_die_lhs->offset == part_die_rhs->offset;
14516 static struct cmd_list_element *set_dwarf2_cmdlist;
14517 static struct cmd_list_element *show_dwarf2_cmdlist;
14520 set_dwarf2_cmd (char *args, int from_tty)
14522 help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
14526 show_dwarf2_cmd (char *args, int from_tty)
14528 cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
14531 /* If section described by INFO was mmapped, munmap it now. */
14534 munmap_section_buffer (struct dwarf2_section_info *info)
14536 if (info->was_mmapped)
14539 intptr_t begin = (intptr_t) info->buffer;
14540 intptr_t map_begin = begin & ~(pagesize - 1);
14541 size_t map_length = info->size + begin - map_begin;
14543 gdb_assert (munmap ((void *) map_begin, map_length) == 0);
14545 /* Without HAVE_MMAP, we should never be here to begin with. */
14546 gdb_assert_not_reached ("no mmap support");
14551 /* munmap debug sections for OBJFILE, if necessary. */
14554 dwarf2_per_objfile_free (struct objfile *objfile, void *d)
14556 struct dwarf2_per_objfile *data = d;
14558 /* This is sorted according to the order they're defined in to make it easier
14559 to keep in sync. */
14560 munmap_section_buffer (&data->info);
14561 munmap_section_buffer (&data->abbrev);
14562 munmap_section_buffer (&data->line);
14563 munmap_section_buffer (&data->loc);
14564 munmap_section_buffer (&data->macinfo);
14565 munmap_section_buffer (&data->str);
14566 munmap_section_buffer (&data->ranges);
14567 munmap_section_buffer (&data->types);
14568 munmap_section_buffer (&data->frame);
14569 munmap_section_buffer (&data->eh_frame);
14570 munmap_section_buffer (&data->gdb_index);
14575 /* The contents of the hash table we create when building the string
14577 struct strtab_entry
14579 offset_type offset;
14583 /* Hash function for a strtab_entry. */
14585 hash_strtab_entry (const void *e)
14587 const struct strtab_entry *entry = e;
14588 return mapped_index_string_hash (entry->str);
14591 /* Equality function for a strtab_entry. */
14593 eq_strtab_entry (const void *a, const void *b)
14595 const struct strtab_entry *ea = a;
14596 const struct strtab_entry *eb = b;
14597 return !strcmp (ea->str, eb->str);
14600 /* Create a strtab_entry hash table. */
14602 create_strtab (void)
14604 return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry,
14605 xfree, xcalloc, xfree);
14608 /* Add a string to the constant pool. Return the string's offset in
14611 add_string (htab_t table, struct obstack *cpool, const char *str)
14614 struct strtab_entry entry;
14615 struct strtab_entry *result;
14618 slot = htab_find_slot (table, &entry, INSERT);
14623 result = XNEW (struct strtab_entry);
14624 result->offset = obstack_object_size (cpool);
14626 obstack_grow_str0 (cpool, str);
14629 return result->offset;
14632 /* An entry in the symbol table. */
14633 struct symtab_index_entry
14635 /* The name of the symbol. */
14637 /* The offset of the name in the constant pool. */
14638 offset_type index_offset;
14639 /* A sorted vector of the indices of all the CUs that hold an object
14641 VEC (offset_type) *cu_indices;
14644 /* The symbol table. This is a power-of-2-sized hash table. */
14645 struct mapped_symtab
14647 offset_type n_elements;
14649 struct symtab_index_entry **data;
14652 /* Hash function for a symtab_index_entry. */
14654 hash_symtab_entry (const void *e)
14656 const struct symtab_index_entry *entry = e;
14657 return iterative_hash (VEC_address (offset_type, entry->cu_indices),
14658 sizeof (offset_type) * VEC_length (offset_type,
14659 entry->cu_indices),
14663 /* Equality function for a symtab_index_entry. */
14665 eq_symtab_entry (const void *a, const void *b)
14667 const struct symtab_index_entry *ea = a;
14668 const struct symtab_index_entry *eb = b;
14669 int len = VEC_length (offset_type, ea->cu_indices);
14670 if (len != VEC_length (offset_type, eb->cu_indices))
14672 return !memcmp (VEC_address (offset_type, ea->cu_indices),
14673 VEC_address (offset_type, eb->cu_indices),
14674 sizeof (offset_type) * len);
14677 /* Destroy a symtab_index_entry. */
14679 delete_symtab_entry (void *p)
14681 struct symtab_index_entry *entry = p;
14682 VEC_free (offset_type, entry->cu_indices);
14686 /* Create a hash table holding symtab_index_entry objects. */
14688 create_index_table (void)
14690 return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry,
14691 delete_symtab_entry, xcalloc, xfree);
14694 /* Create a new mapped symtab object. */
14695 static struct mapped_symtab *
14696 create_mapped_symtab (void)
14698 struct mapped_symtab *symtab = XNEW (struct mapped_symtab);
14699 symtab->n_elements = 0;
14700 symtab->size = 1024;
14701 symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
14705 /* Destroy a mapped_symtab. */
14707 cleanup_mapped_symtab (void *p)
14709 struct mapped_symtab *symtab = p;
14710 /* The contents of the array are freed when the other hash table is
14712 xfree (symtab->data);
14716 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
14718 static struct symtab_index_entry **
14719 find_slot (struct mapped_symtab *symtab, const char *name)
14721 offset_type index, step, hash = mapped_index_string_hash (name);
14723 index = hash & (symtab->size - 1);
14724 step = ((hash * 17) & (symtab->size - 1)) | 1;
14728 if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name))
14729 return &symtab->data[index];
14730 index = (index + step) & (symtab->size - 1);
14734 /* Expand SYMTAB's hash table. */
14736 hash_expand (struct mapped_symtab *symtab)
14738 offset_type old_size = symtab->size;
14740 struct symtab_index_entry **old_entries = symtab->data;
14743 symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
14745 for (i = 0; i < old_size; ++i)
14747 if (old_entries[i])
14749 struct symtab_index_entry **slot = find_slot (symtab,
14750 old_entries[i]->name);
14751 *slot = old_entries[i];
14755 xfree (old_entries);
14758 /* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
14759 is the index of the CU in which the symbol appears. */
14761 add_index_entry (struct mapped_symtab *symtab, const char *name,
14762 offset_type cu_index)
14764 struct symtab_index_entry **slot;
14766 ++symtab->n_elements;
14767 if (4 * symtab->n_elements / 3 >= symtab->size)
14768 hash_expand (symtab);
14770 slot = find_slot (symtab, name);
14773 *slot = XNEW (struct symtab_index_entry);
14774 (*slot)->name = name;
14775 (*slot)->cu_indices = NULL;
14777 /* Don't push an index twice. Due to how we add entries we only
14778 have to check the last one. */
14779 if (VEC_empty (offset_type, (*slot)->cu_indices)
14780 || VEC_length (offset_type, (*slot)->cu_indices) != cu_index)
14781 VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index);
14784 /* Add a vector of indices to the constant pool. */
14786 add_indices_to_cpool (htab_t index_table, struct obstack *cpool,
14787 struct symtab_index_entry *entry)
14791 slot = htab_find_slot (index_table, entry, INSERT);
14794 offset_type len = VEC_length (offset_type, entry->cu_indices);
14795 offset_type val = MAYBE_SWAP (len);
14800 entry->index_offset = obstack_object_size (cpool);
14802 obstack_grow (cpool, &val, sizeof (val));
14804 VEC_iterate (offset_type, entry->cu_indices, i, iter);
14807 val = MAYBE_SWAP (iter);
14808 obstack_grow (cpool, &val, sizeof (val));
14813 struct symtab_index_entry *old_entry = *slot;
14814 entry->index_offset = old_entry->index_offset;
14817 return entry->index_offset;
14820 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
14821 constant pool entries going into the obstack CPOOL. */
14823 write_hash_table (struct mapped_symtab *symtab,
14824 struct obstack *output, struct obstack *cpool)
14827 htab_t index_table;
14830 index_table = create_index_table ();
14831 str_table = create_strtab ();
14832 /* We add all the index vectors to the constant pool first, to
14833 ensure alignment is ok. */
14834 for (i = 0; i < symtab->size; ++i)
14836 if (symtab->data[i])
14837 add_indices_to_cpool (index_table, cpool, symtab->data[i]);
14840 /* Now write out the hash table. */
14841 for (i = 0; i < symtab->size; ++i)
14843 offset_type str_off, vec_off;
14845 if (symtab->data[i])
14847 str_off = add_string (str_table, cpool, symtab->data[i]->name);
14848 vec_off = symtab->data[i]->index_offset;
14852 /* While 0 is a valid constant pool index, it is not valid
14853 to have 0 for both offsets. */
14858 str_off = MAYBE_SWAP (str_off);
14859 vec_off = MAYBE_SWAP (vec_off);
14861 obstack_grow (output, &str_off, sizeof (str_off));
14862 obstack_grow (output, &vec_off, sizeof (vec_off));
14865 htab_delete (str_table);
14866 htab_delete (index_table);
14869 /* Write an address entry to ADDR_OBSTACK. The addresses are taken
14870 from PST; CU_INDEX is the index of the CU in the vector of all
14873 add_address_entry (struct objfile *objfile,
14874 struct obstack *addr_obstack, struct partial_symtab *pst,
14875 unsigned int cu_index)
14877 offset_type offset;
14879 CORE_ADDR baseaddr;
14881 /* Don't bother recording empty ranges. */
14882 if (pst->textlow == pst->texthigh)
14885 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
14887 store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, pst->textlow - baseaddr);
14888 obstack_grow (addr_obstack, addr, 8);
14889 store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, pst->texthigh - baseaddr);
14890 obstack_grow (addr_obstack, addr, 8);
14891 offset = MAYBE_SWAP (cu_index);
14892 obstack_grow (addr_obstack, &offset, sizeof (offset_type));
14895 /* Add a list of partial symbols to SYMTAB. */
14897 write_psymbols (struct mapped_symtab *symtab,
14898 struct partial_symbol **psymp,
14900 offset_type cu_index)
14902 for (; count-- > 0; ++psymp)
14904 if (SYMBOL_LANGUAGE (*psymp) == language_ada)
14905 error (_("Ada is not currently supported by the index"));
14906 add_index_entry (symtab, SYMBOL_NATURAL_NAME (*psymp), cu_index);
14910 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
14911 exception if there is an error. */
14913 write_obstack (FILE *file, struct obstack *obstack)
14915 if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack),
14917 != obstack_object_size (obstack))
14918 error (_("couldn't data write to file"));
14921 /* Unlink a file if the argument is not NULL. */
14923 unlink_if_set (void *p)
14925 char **filename = p;
14927 unlink (*filename);
14930 /* A helper struct used when iterating over debug_types. */
14931 struct signatured_type_index_data
14933 struct objfile *objfile;
14934 struct mapped_symtab *symtab;
14935 struct obstack *types_list;
14939 /* A helper function that writes a single signatured_type to an
14942 write_one_signatured_type (void **slot, void *d)
14944 struct signatured_type_index_data *info = d;
14945 struct signatured_type *entry = (struct signatured_type *) *slot;
14946 struct dwarf2_per_cu_data *per_cu = &entry->per_cu;
14947 struct partial_symtab *psymtab = per_cu->v.psymtab;
14950 write_psymbols (info->symtab,
14951 info->objfile->global_psymbols.list + psymtab->globals_offset,
14952 psymtab->n_global_syms, info->cu_index);
14953 write_psymbols (info->symtab,
14954 info->objfile->static_psymbols.list + psymtab->statics_offset,
14955 psymtab->n_static_syms, info->cu_index);
14957 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->offset);
14958 obstack_grow (info->types_list, val, 8);
14959 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->type_offset);
14960 obstack_grow (info->types_list, val, 8);
14961 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature);
14962 obstack_grow (info->types_list, val, 8);
14969 /* Create an index file for OBJFILE in the directory DIR. */
14971 write_psymtabs_to_index (struct objfile *objfile, const char *dir)
14973 struct cleanup *cleanup;
14974 char *filename, *cleanup_filename;
14975 struct obstack contents, addr_obstack, constant_pool, symtab_obstack;
14976 struct obstack cu_list, types_cu_list;
14979 struct mapped_symtab *symtab;
14980 offset_type val, size_of_contents, total_len;
14984 if (!objfile->psymtabs)
14986 if (dwarf2_per_objfile->using_index)
14987 error (_("Cannot use an index to create the index"));
14989 if (stat (objfile->name, &st) < 0)
14990 perror_with_name (_("Could not stat"));
14992 filename = concat (dir, SLASH_STRING, lbasename (objfile->name),
14993 INDEX_SUFFIX, (char *) NULL);
14994 cleanup = make_cleanup (xfree, filename);
14996 out_file = fopen (filename, "wb");
14998 error (_("Can't open `%s' for writing"), filename);
15000 cleanup_filename = filename;
15001 make_cleanup (unlink_if_set, &cleanup_filename);
15003 symtab = create_mapped_symtab ();
15004 make_cleanup (cleanup_mapped_symtab, symtab);
15006 obstack_init (&addr_obstack);
15007 make_cleanup_obstack_free (&addr_obstack);
15009 obstack_init (&cu_list);
15010 make_cleanup_obstack_free (&cu_list);
15012 obstack_init (&types_cu_list);
15013 make_cleanup_obstack_free (&types_cu_list);
15015 /* The list is already sorted, so we don't need to do additional
15016 work here. Also, the debug_types entries do not appear in
15017 all_comp_units, but only in their own hash table. */
15018 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
15020 struct dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->all_comp_units[i];
15021 struct partial_symtab *psymtab = per_cu->v.psymtab;
15024 write_psymbols (symtab,
15025 objfile->global_psymbols.list + psymtab->globals_offset,
15026 psymtab->n_global_syms, i);
15027 write_psymbols (symtab,
15028 objfile->static_psymbols.list + psymtab->statics_offset,
15029 psymtab->n_static_syms, i);
15031 add_address_entry (objfile, &addr_obstack, psymtab, i);
15033 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->offset);
15034 obstack_grow (&cu_list, val, 8);
15035 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length);
15036 obstack_grow (&cu_list, val, 8);
15039 /* Write out the .debug_type entries, if any. */
15040 if (dwarf2_per_objfile->signatured_types)
15042 struct signatured_type_index_data sig_data;
15044 sig_data.objfile = objfile;
15045 sig_data.symtab = symtab;
15046 sig_data.types_list = &types_cu_list;
15047 sig_data.cu_index = dwarf2_per_objfile->n_comp_units;
15048 htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
15049 write_one_signatured_type, &sig_data);
15052 obstack_init (&constant_pool);
15053 make_cleanup_obstack_free (&constant_pool);
15054 obstack_init (&symtab_obstack);
15055 make_cleanup_obstack_free (&symtab_obstack);
15056 write_hash_table (symtab, &symtab_obstack, &constant_pool);
15058 obstack_init (&contents);
15059 make_cleanup_obstack_free (&contents);
15060 size_of_contents = 6 * sizeof (offset_type);
15061 total_len = size_of_contents;
15063 /* The version number. */
15064 val = MAYBE_SWAP (2);
15065 obstack_grow (&contents, &val, sizeof (val));
15067 /* The offset of the CU list from the start of the file. */
15068 val = MAYBE_SWAP (total_len);
15069 obstack_grow (&contents, &val, sizeof (val));
15070 total_len += obstack_object_size (&cu_list);
15072 /* The offset of the types CU list from the start of the file. */
15073 val = MAYBE_SWAP (total_len);
15074 obstack_grow (&contents, &val, sizeof (val));
15075 total_len += obstack_object_size (&types_cu_list);
15077 /* The offset of the address table from the start of the file. */
15078 val = MAYBE_SWAP (total_len);
15079 obstack_grow (&contents, &val, sizeof (val));
15080 total_len += obstack_object_size (&addr_obstack);
15082 /* The offset of the symbol table from the start of the file. */
15083 val = MAYBE_SWAP (total_len);
15084 obstack_grow (&contents, &val, sizeof (val));
15085 total_len += obstack_object_size (&symtab_obstack);
15087 /* The offset of the constant pool from the start of the file. */
15088 val = MAYBE_SWAP (total_len);
15089 obstack_grow (&contents, &val, sizeof (val));
15090 total_len += obstack_object_size (&constant_pool);
15092 gdb_assert (obstack_object_size (&contents) == size_of_contents);
15094 write_obstack (out_file, &contents);
15095 write_obstack (out_file, &cu_list);
15096 write_obstack (out_file, &types_cu_list);
15097 write_obstack (out_file, &addr_obstack);
15098 write_obstack (out_file, &symtab_obstack);
15099 write_obstack (out_file, &constant_pool);
15103 /* We want to keep the file, so we set cleanup_filename to NULL
15104 here. See unlink_if_set. */
15105 cleanup_filename = NULL;
15107 do_cleanups (cleanup);
15110 /* The mapped index file format is designed to be directly mmap()able
15111 on any architecture. In most cases, a datum is represented using a
15112 little-endian 32-bit integer value, called an offset_type. Big
15113 endian machines must byte-swap the values before using them.
15114 Exceptions to this rule are noted. The data is laid out such that
15115 alignment is always respected.
15117 A mapped index consists of several sections.
15119 1. The file header. This is a sequence of values, of offset_type
15120 unless otherwise noted:
15121 [0] The version number. Currently 1 or 2. The differences are
15122 noted below. Version 1 did not account for .debug_types sections;
15123 the presence of a .debug_types section invalidates any version 1
15124 index that may exist.
15125 [1] The offset, from the start of the file, of the CU list.
15126 [1.5] In version 2, the offset, from the start of the file, of the
15127 types CU list. This offset does not appear in version 1. Note
15128 that this can be empty, in which case this offset will be equal to
15130 [2] The offset, from the start of the file, of the address section.
15131 [3] The offset, from the start of the file, of the symbol table.
15132 [4] The offset, from the start of the file, of the constant pool.
15134 2. The CU list. This is a sequence of pairs of 64-bit
15135 little-endian values, sorted by the CU offset. The first element
15136 in each pair is the offset of a CU in the .debug_info section. The
15137 second element in each pair is the length of that CU. References
15138 to a CU elsewhere in the map are done using a CU index, which is
15139 just the 0-based index into this table. Note that if there are
15140 type CUs, then conceptually CUs and type CUs form a single list for
15141 the purposes of CU indices.
15143 2.5 The types CU list. This does not appear in a version 1 index.
15144 This is a sequence of triplets of 64-bit little-endian values. In
15145 a triplet, the first value is the CU offset, the second value is
15146 the type offset in the CU, and the third value is the type
15147 signature. The types CU list is not sorted.
15149 3. The address section. The address section consists of a sequence
15150 of address entries. Each address entry has three elements.
15151 [0] The low address. This is a 64-bit little-endian value.
15152 [1] The high address. This is a 64-bit little-endian value.
15153 [2] The CU index. This is an offset_type value.
15155 4. The symbol table. This is a hash table. The size of the hash
15156 table is always a power of 2. The initial hash and the step are
15157 currently defined by the `find_slot' function.
15159 Each slot in the hash table consists of a pair of offset_type
15160 values. The first value is the offset of the symbol's name in the
15161 constant pool. The second value is the offset of the CU vector in
15164 If both values are 0, then this slot in the hash table is empty.
15165 This is ok because while 0 is a valid constant pool index, it
15166 cannot be a valid index for both a string and a CU vector.
15168 A string in the constant pool is stored as a \0-terminated string,
15171 A CU vector in the constant pool is a sequence of offset_type
15172 values. The first value is the number of CU indices in the vector.
15173 Each subsequent value is the index of a CU in the CU list. This
15174 element in the hash table is used to indicate which CUs define the
15177 5. The constant pool. This is simply a bunch of bytes. It is
15178 organized so that alignment is correct: CU vectors are stored
15179 first, followed by strings. */
15181 save_gdb_index_command (char *arg, int from_tty)
15183 struct objfile *objfile;
15186 error (_("usage: save gdb-index DIRECTORY"));
15188 ALL_OBJFILES (objfile)
15192 /* If the objfile does not correspond to an actual file, skip it. */
15193 if (stat (objfile->name, &st) < 0)
15196 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
15197 if (dwarf2_per_objfile)
15199 volatile struct gdb_exception except;
15201 TRY_CATCH (except, RETURN_MASK_ERROR)
15203 write_psymtabs_to_index (objfile, arg);
15205 if (except.reason < 0)
15206 exception_fprintf (gdb_stderr, except,
15207 _("Error while writing index for `%s': "),
15215 int dwarf2_always_disassemble;
15218 show_dwarf2_always_disassemble (struct ui_file *file, int from_tty,
15219 struct cmd_list_element *c, const char *value)
15221 fprintf_filtered (file, _("\
15222 Whether to always disassemble DWARF expressions is %s.\n"),
15226 void _initialize_dwarf2_read (void);
15229 _initialize_dwarf2_read (void)
15231 struct cmd_list_element *c;
15233 dwarf2_objfile_data_key
15234 = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free);
15236 add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
15237 Set DWARF 2 specific variables.\n\
15238 Configure DWARF 2 variables such as the cache size"),
15239 &set_dwarf2_cmdlist, "maintenance set dwarf2 ",
15240 0/*allow-unknown*/, &maintenance_set_cmdlist);
15242 add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\
15243 Show DWARF 2 specific variables\n\
15244 Show DWARF 2 variables such as the cache size"),
15245 &show_dwarf2_cmdlist, "maintenance show dwarf2 ",
15246 0/*allow-unknown*/, &maintenance_show_cmdlist);
15248 add_setshow_zinteger_cmd ("max-cache-age", class_obscure,
15249 &dwarf2_max_cache_age, _("\
15250 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
15251 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
15252 A higher limit means that cached compilation units will be stored\n\
15253 in memory longer, and more total memory will be used. Zero disables\n\
15254 caching, which can slow down startup."),
15256 show_dwarf2_max_cache_age,
15257 &set_dwarf2_cmdlist,
15258 &show_dwarf2_cmdlist);
15260 add_setshow_boolean_cmd ("always-disassemble", class_obscure,
15261 &dwarf2_always_disassemble, _("\
15262 Set whether `info address' always disassembles DWARF expressions."), _("\
15263 Show whether `info address' always disassembles DWARF expressions."), _("\
15264 When enabled, DWARF expressions are always printed in an assembly-like\n\
15265 syntax. When disabled, expressions will be printed in a more\n\
15266 conversational style, when possible."),
15268 show_dwarf2_always_disassemble,
15269 &set_dwarf2_cmdlist,
15270 &show_dwarf2_cmdlist);
15272 add_setshow_zinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\
15273 Set debugging of the dwarf2 DIE reader."), _("\
15274 Show debugging of the dwarf2 DIE reader."), _("\
15275 When enabled (non-zero), DIEs are dumped after they are read in.\n\
15276 The value is the maximum depth to print."),
15279 &setdebuglist, &showdebuglist);
15281 c = add_cmd ("gdb-index", class_files, save_gdb_index_command,
15282 _("Save a .gdb-index file"),
15284 set_cmd_completer (c, filename_completer);