1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2012 Free Software Foundation, Inc.
5 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
6 Inc. with support from Florida State University (under contract
7 with the Ada Joint Program Office), and Silicon Graphics, Inc.
8 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
9 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
12 This file is part of GDB.
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 3 of the License, or
17 (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 /* FIXME: Various die-reading functions need to be more careful with
28 reading off the end of the section.
29 E.g., load_partial_dies, read_partial_die. */
39 #include "gdb-demangle.h"
40 #include "expression.h"
41 #include "filenames.h" /* for DOSish file names */
44 #include "complaints.h"
46 #include "dwarf2expr.h"
47 #include "dwarf2loc.h"
48 #include "cp-support.h"
54 #include "typeprint.h"
57 #include "exceptions.h"
59 #include "completer.h"
66 #include "gdb_string.h"
67 #include "gdb_assert.h"
68 #include <sys/types.h>
75 #define MAP_FAILED ((void *) -1)
79 typedef struct symbol
*symbolp
;
82 /* When non-zero, dump DIEs after they are read in. */
83 static int dwarf2_die_debug
= 0;
85 /* When non-zero, cross-check physname against demangler. */
86 static int check_physname
= 0;
88 /* When non-zero, do not reject deprecated .gdb_index sections. */
89 int use_deprecated_index_sections
= 0;
93 /* When set, the file that we're processing is known to have debugging
94 info for C++ namespaces. GCC 3.3.x did not produce this information,
95 but later versions do. */
97 static int processing_has_namespace_info
;
99 static const struct objfile_data
*dwarf2_objfile_data_key
;
101 struct dwarf2_section_info
106 /* Not NULL if the section was actually mmapped. */
108 /* Page aligned size of mmapped area. */
109 bfd_size_type map_len
;
110 /* True if we have tried to read this section. */
114 typedef struct dwarf2_section_info dwarf2_section_info_def
;
115 DEF_VEC_O (dwarf2_section_info_def
);
117 /* All offsets in the index are of this type. It must be
118 architecture-independent. */
119 typedef uint32_t offset_type
;
121 DEF_VEC_I (offset_type
);
123 /* A description of the mapped index. The file format is described in
124 a comment by the code that writes the index. */
127 /* Index data format version. */
130 /* The total length of the buffer. */
133 /* A pointer to the address table data. */
134 const gdb_byte
*address_table
;
136 /* Size of the address table data in bytes. */
137 offset_type address_table_size
;
139 /* The symbol table, implemented as a hash table. */
140 const offset_type
*symbol_table
;
142 /* Size in slots, each slot is 2 offset_types. */
143 offset_type symbol_table_slots
;
145 /* A pointer to the constant pool. */
146 const char *constant_pool
;
149 /* Collection of data recorded per objfile.
150 This hangs off of dwarf2_objfile_data_key. */
152 struct dwarf2_per_objfile
154 struct dwarf2_section_info info
;
155 struct dwarf2_section_info abbrev
;
156 struct dwarf2_section_info line
;
157 struct dwarf2_section_info loc
;
158 struct dwarf2_section_info macinfo
;
159 struct dwarf2_section_info macro
;
160 struct dwarf2_section_info str
;
161 struct dwarf2_section_info ranges
;
162 struct dwarf2_section_info frame
;
163 struct dwarf2_section_info eh_frame
;
164 struct dwarf2_section_info gdb_index
;
166 VEC (dwarf2_section_info_def
) *types
;
169 struct objfile
*objfile
;
171 /* Table of all the compilation units. This is used to locate
172 the target compilation unit of a particular reference. */
173 struct dwarf2_per_cu_data
**all_comp_units
;
175 /* The number of compilation units in ALL_COMP_UNITS. */
178 /* The number of .debug_types-related CUs. */
181 /* The .debug_types-related CUs (TUs). */
182 struct dwarf2_per_cu_data
**all_type_units
;
184 /* A chain of compilation units that are currently read in, so that
185 they can be freed later. */
186 struct dwarf2_per_cu_data
*read_in_chain
;
188 /* A table mapping .debug_types signatures to its signatured_type entry.
189 This is NULL if the .debug_types section hasn't been read in yet. */
190 htab_t signatured_types
;
192 /* A flag indicating wether this objfile has a section loaded at a
194 int has_section_at_zero
;
196 /* True if we are using the mapped index,
197 or we are faking it for OBJF_READNOW's sake. */
198 unsigned char using_index
;
200 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
201 struct mapped_index
*index_table
;
203 /* When using index_table, this keeps track of all quick_file_names entries.
204 TUs can share line table entries with CUs or other TUs, and there can be
205 a lot more TUs than unique line tables, so we maintain a separate table
206 of all line table entries to support the sharing. */
207 htab_t quick_file_names_table
;
209 /* Set during partial symbol reading, to prevent queueing of full
211 int reading_partial_symbols
;
213 /* Table mapping type .debug_info DIE offsets to types.
214 This is NULL if not allocated yet.
215 It (currently) makes sense to allocate debug_types_type_hash lazily.
216 To keep things simple we allocate both lazily. */
217 htab_t debug_info_type_hash
;
219 /* Table mapping type .debug_types DIE sect_offset to types.
220 This is NULL if not allocated yet. */
221 htab_t debug_types_type_hash
;
224 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
226 /* Default names of the debugging sections. */
228 /* Note that if the debugging section has been compressed, it might
229 have a name like .zdebug_info. */
231 static const struct dwarf2_debug_sections dwarf2_elf_names
=
233 { ".debug_info", ".zdebug_info" },
234 { ".debug_abbrev", ".zdebug_abbrev" },
235 { ".debug_line", ".zdebug_line" },
236 { ".debug_loc", ".zdebug_loc" },
237 { ".debug_macinfo", ".zdebug_macinfo" },
238 { ".debug_macro", ".zdebug_macro" },
239 { ".debug_str", ".zdebug_str" },
240 { ".debug_ranges", ".zdebug_ranges" },
241 { ".debug_types", ".zdebug_types" },
242 { ".debug_frame", ".zdebug_frame" },
243 { ".eh_frame", NULL
},
244 { ".gdb_index", ".zgdb_index" },
248 /* local data types */
250 /* We hold several abbreviation tables in memory at the same time. */
251 #ifndef ABBREV_HASH_SIZE
252 #define ABBREV_HASH_SIZE 121
255 /* The data in a compilation unit header, after target2host
256 translation, looks like this. */
257 struct comp_unit_head
261 unsigned char addr_size
;
262 unsigned char signed_addr_p
;
263 sect_offset abbrev_offset
;
265 /* Size of file offsets; either 4 or 8. */
266 unsigned int offset_size
;
268 /* Size of the length field; either 4 or 12. */
269 unsigned int initial_length_size
;
271 /* Offset to the first byte of this compilation unit header in the
272 .debug_info section, for resolving relative reference dies. */
275 /* Offset to first die in this cu from the start of the cu.
276 This will be the first byte following the compilation unit header. */
277 cu_offset first_die_offset
;
280 /* Type used for delaying computation of method physnames.
281 See comments for compute_delayed_physnames. */
282 struct delayed_method_info
284 /* The type to which the method is attached, i.e., its parent class. */
287 /* The index of the method in the type's function fieldlists. */
290 /* The index of the method in the fieldlist. */
293 /* The name of the DIE. */
296 /* The DIE associated with this method. */
297 struct die_info
*die
;
300 typedef struct delayed_method_info delayed_method_info
;
301 DEF_VEC_O (delayed_method_info
);
303 /* Internal state when decoding a particular compilation unit. */
306 /* The objfile containing this compilation unit. */
307 struct objfile
*objfile
;
309 /* The header of the compilation unit. */
310 struct comp_unit_head header
;
312 /* Base address of this compilation unit. */
313 CORE_ADDR base_address
;
315 /* Non-zero if base_address has been set. */
318 /* The language we are debugging. */
319 enum language language
;
320 const struct language_defn
*language_defn
;
322 const char *producer
;
324 /* The generic symbol table building routines have separate lists for
325 file scope symbols and all all other scopes (local scopes). So
326 we need to select the right one to pass to add_symbol_to_list().
327 We do it by keeping a pointer to the correct list in list_in_scope.
329 FIXME: The original dwarf code just treated the file scope as the
330 first local scope, and all other local scopes as nested local
331 scopes, and worked fine. Check to see if we really need to
332 distinguish these in buildsym.c. */
333 struct pending
**list_in_scope
;
335 /* DWARF abbreviation table associated with this compilation unit. */
336 struct abbrev_info
**dwarf2_abbrevs
;
338 /* Storage for the abbrev table. */
339 struct obstack abbrev_obstack
;
341 /* Hash table holding all the loaded partial DIEs
342 with partial_die->offset.SECT_OFF as hash. */
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 cu_offset for following references with
362 die_info->offset.sect_off as hash. */
365 /* Full DIEs if read in. */
366 struct die_info
*dies
;
368 /* A set of pointers to dwarf2_per_cu_data objects for compilation
369 units referenced by this one. Only set during full symbol processing;
370 partial symbol tables do not have dependencies. */
373 /* Header data from the line table, during full symbol processing. */
374 struct line_header
*line_header
;
376 /* A list of methods which need to have physnames computed
377 after all type information has been read. */
378 VEC (delayed_method_info
) *method_list
;
380 /* To be copied to symtab->call_site_htab. */
381 htab_t call_site_htab
;
383 /* Mark used when releasing cached dies. */
384 unsigned int mark
: 1;
386 /* This CU references .debug_loc. See the symtab->locations_valid field.
387 This test is imperfect as there may exist optimized debug code not using
388 any location list and still facing inlining issues if handled as
389 unoptimized code. For a future better test see GCC PR other/32998. */
390 unsigned int has_loclist
: 1;
392 /* These cache the results of producer_is_gxx_lt_4_6.
393 CHECKED_PRODUCER is set if PRODUCER_IS_GXX_LT_4_6 is valid. This
394 information is cached because profiling CU expansion showed
395 excessive time spent in producer_is_gxx_lt_4_6. */
396 unsigned int checked_producer
: 1;
397 unsigned int producer_is_gxx_lt_4_6
: 1;
400 /* Persistent data held for a compilation unit, even when not
401 processing it. We put a pointer to this structure in the
402 read_symtab_private field of the psymtab. */
404 struct dwarf2_per_cu_data
406 /* The start offset and length of this compilation unit. 2**29-1
407 bytes should suffice to store the length of any compilation unit
408 - if it doesn't, GDB will fall over anyway.
409 NOTE: Unlike comp_unit_head.length, this length includes
410 initial_length_size. */
412 unsigned int length
: 29;
414 /* Flag indicating this compilation unit will be read in before
415 any of the current compilation units are processed. */
416 unsigned int queued
: 1;
418 /* This flag will be set when reading partial DIEs if we need to load
419 absolutely all DIEs for this compilation unit, instead of just the ones
420 we think are interesting. It gets set if we look for a DIE in the
421 hash table and don't find it. */
422 unsigned int load_all_dies
: 1;
424 /* Non-null if this CU is from .debug_types; in which case it points
425 to the section. Otherwise it's from .debug_info. */
426 struct dwarf2_section_info
*debug_types_section
;
428 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
429 of the CU cache it gets reset to NULL again. */
430 struct dwarf2_cu
*cu
;
432 /* The corresponding objfile.
433 Normally we can get the objfile from dwarf2_per_objfile.
434 However we can enter this file with just a "per_cu" handle. */
435 struct objfile
*objfile
;
437 /* When using partial symbol tables, the 'psymtab' field is active.
438 Otherwise the 'quick' field is active. */
441 /* The partial symbol table associated with this compilation unit,
442 or NULL for partial units (which do not have an associated
444 struct partial_symtab
*psymtab
;
446 /* Data needed by the "quick" functions. */
447 struct dwarf2_per_cu_quick_data
*quick
;
451 /* Entry in the signatured_types hash table. */
453 struct signatured_type
457 /* Offset in this TU of the type defined by this TU. */
458 cu_offset type_offset
;
460 /* The CU(/TU) of this type. */
461 struct dwarf2_per_cu_data per_cu
;
464 /* Struct used to pass misc. parameters to read_die_and_children, et
465 al. which are used for both .debug_info and .debug_types dies.
466 All parameters here are unchanging for the life of the call. This
467 struct exists to abstract away the constant parameters of die
470 struct die_reader_specs
472 /* The bfd of this objfile. */
475 /* The CU of the DIE we are parsing. */
476 struct dwarf2_cu
*cu
;
478 /* Pointer to start of section buffer.
479 This is either the start of .debug_info or .debug_types. */
480 const gdb_byte
*buffer
;
483 /* The line number information for a compilation unit (found in the
484 .debug_line section) begins with a "statement program header",
485 which contains the following information. */
488 unsigned int total_length
;
489 unsigned short version
;
490 unsigned int header_length
;
491 unsigned char minimum_instruction_length
;
492 unsigned char maximum_ops_per_instruction
;
493 unsigned char default_is_stmt
;
495 unsigned char line_range
;
496 unsigned char opcode_base
;
498 /* standard_opcode_lengths[i] is the number of operands for the
499 standard opcode whose value is i. This means that
500 standard_opcode_lengths[0] is unused, and the last meaningful
501 element is standard_opcode_lengths[opcode_base - 1]. */
502 unsigned char *standard_opcode_lengths
;
504 /* The include_directories table. NOTE! These strings are not
505 allocated with xmalloc; instead, they are pointers into
506 debug_line_buffer. If you try to free them, `free' will get
508 unsigned int num_include_dirs
, include_dirs_size
;
511 /* The file_names table. NOTE! These strings are not allocated
512 with xmalloc; instead, they are pointers into debug_line_buffer.
513 Don't try to free them directly. */
514 unsigned int num_file_names
, file_names_size
;
518 unsigned int dir_index
;
519 unsigned int mod_time
;
521 int included_p
; /* Non-zero if referenced by the Line Number Program. */
522 struct symtab
*symtab
; /* The associated symbol table, if any. */
525 /* The start and end of the statement program following this
526 header. These point into dwarf2_per_objfile->line_buffer. */
527 gdb_byte
*statement_program_start
, *statement_program_end
;
530 /* When we construct a partial symbol table entry we only
531 need this much information. */
532 struct partial_die_info
534 /* Offset of this DIE. */
537 /* DWARF-2 tag for this DIE. */
538 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
540 /* Assorted flags describing the data found in this DIE. */
541 unsigned int has_children
: 1;
542 unsigned int is_external
: 1;
543 unsigned int is_declaration
: 1;
544 unsigned int has_type
: 1;
545 unsigned int has_specification
: 1;
546 unsigned int has_pc_info
: 1;
547 unsigned int may_be_inlined
: 1;
549 /* Flag set if the SCOPE field of this structure has been
551 unsigned int scope_set
: 1;
553 /* Flag set if the DIE has a byte_size attribute. */
554 unsigned int has_byte_size
: 1;
556 /* Flag set if any of the DIE's children are template arguments. */
557 unsigned int has_template_arguments
: 1;
559 /* Flag set if fixup_partial_die has been called on this die. */
560 unsigned int fixup_called
: 1;
562 /* The name of this DIE. Normally the value of DW_AT_name, but
563 sometimes a default name for unnamed DIEs. */
566 /* The linkage name, if present. */
567 const char *linkage_name
;
569 /* The scope to prepend to our children. This is generally
570 allocated on the comp_unit_obstack, so will disappear
571 when this compilation unit leaves the cache. */
574 /* The location description associated with this DIE, if any. */
575 struct dwarf_block
*locdesc
;
577 /* If HAS_PC_INFO, the PC range associated with this DIE. */
581 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
582 DW_AT_sibling, if any. */
583 /* NOTE: This member isn't strictly necessary, read_partial_die could
584 return DW_AT_sibling values to its caller load_partial_dies. */
587 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
588 DW_AT_specification (or DW_AT_abstract_origin or
590 sect_offset spec_offset
;
592 /* Pointers to this DIE's parent, first child, and next sibling,
594 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
597 /* This data structure holds the information of an abbrev. */
600 unsigned int number
; /* number identifying abbrev */
601 enum dwarf_tag tag
; /* dwarf tag */
602 unsigned short has_children
; /* boolean */
603 unsigned short num_attrs
; /* number of attributes */
604 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
605 struct abbrev_info
*next
; /* next in chain */
610 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
611 ENUM_BITFIELD(dwarf_form
) form
: 16;
614 /* Attributes have a name and a value. */
617 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
618 ENUM_BITFIELD(dwarf_form
) form
: 15;
620 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
621 field should be in u.str (existing only for DW_STRING) but it is kept
622 here for better struct attribute alignment. */
623 unsigned int string_is_canonical
: 1;
628 struct dwarf_block
*blk
;
632 struct signatured_type
*signatured_type
;
637 /* This data structure holds a complete die structure. */
640 /* DWARF-2 tag for this DIE. */
641 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
643 /* Number of attributes */
644 unsigned char num_attrs
;
646 /* True if we're presently building the full type name for the
647 type derived from this DIE. */
648 unsigned char building_fullname
: 1;
653 /* Offset in .debug_info or .debug_types section. */
656 /* The dies in a compilation unit form an n-ary tree. PARENT
657 points to this die's parent; CHILD points to the first child of
658 this node; and all the children of a given node are chained
659 together via their SIBLING fields. */
660 struct die_info
*child
; /* Its first child, if any. */
661 struct die_info
*sibling
; /* Its next sibling, if any. */
662 struct die_info
*parent
; /* Its parent, if any. */
664 /* An array of attributes, with NUM_ATTRS elements. There may be
665 zero, but it's not common and zero-sized arrays are not
666 sufficiently portable C. */
667 struct attribute attrs
[1];
670 /* Get at parts of an attribute structure. */
672 #define DW_STRING(attr) ((attr)->u.str)
673 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
674 #define DW_UNSND(attr) ((attr)->u.unsnd)
675 #define DW_BLOCK(attr) ((attr)->u.blk)
676 #define DW_SND(attr) ((attr)->u.snd)
677 #define DW_ADDR(attr) ((attr)->u.addr)
678 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
680 /* Blocks are a bunch of untyped bytes. */
685 /* Valid only if SIZE is not zero. */
689 #ifndef ATTR_ALLOC_CHUNK
690 #define ATTR_ALLOC_CHUNK 4
693 /* Allocate fields for structs, unions and enums in this size. */
694 #ifndef DW_FIELD_ALLOC_CHUNK
695 #define DW_FIELD_ALLOC_CHUNK 4
698 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
699 but this would require a corresponding change in unpack_field_as_long
701 static int bits_per_byte
= 8;
703 /* The routines that read and process dies for a C struct or C++ class
704 pass lists of data member fields and lists of member function fields
705 in an instance of a field_info structure, as defined below. */
708 /* List of data member and baseclasses fields. */
711 struct nextfield
*next
;
716 *fields
, *baseclasses
;
718 /* Number of fields (including baseclasses). */
721 /* Number of baseclasses. */
724 /* Set if the accesibility of one of the fields is not public. */
725 int non_public_fields
;
727 /* Member function fields array, entries are allocated in the order they
728 are encountered in the object file. */
731 struct nextfnfield
*next
;
732 struct fn_field fnfield
;
736 /* Member function fieldlist array, contains name of possibly overloaded
737 member function, number of overloaded member functions and a pointer
738 to the head of the member function field chain. */
743 struct nextfnfield
*head
;
747 /* Number of entries in the fnfieldlists array. */
750 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
751 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
752 struct typedef_field_list
754 struct typedef_field field
;
755 struct typedef_field_list
*next
;
758 unsigned typedef_field_list_count
;
761 /* One item on the queue of compilation units to read in full symbols
763 struct dwarf2_queue_item
765 struct dwarf2_per_cu_data
*per_cu
;
766 struct dwarf2_queue_item
*next
;
769 /* The current queue. */
770 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
772 /* Loaded secondary compilation units are kept in memory until they
773 have not been referenced for the processing of this many
774 compilation units. Set this to zero to disable caching. Cache
775 sizes of up to at least twenty will improve startup time for
776 typical inter-CU-reference binaries, at an obvious memory cost. */
777 static int dwarf2_max_cache_age
= 5;
779 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
780 struct cmd_list_element
*c
, const char *value
)
782 fprintf_filtered (file
, _("The upper bound on the age of cached "
783 "dwarf2 compilation units is %s.\n"),
788 /* Various complaints about symbol reading that don't abort the process. */
791 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
793 complaint (&symfile_complaints
,
794 _("statement list doesn't fit in .debug_line section"));
798 dwarf2_debug_line_missing_file_complaint (void)
800 complaint (&symfile_complaints
,
801 _(".debug_line section has line data without a file"));
805 dwarf2_debug_line_missing_end_sequence_complaint (void)
807 complaint (&symfile_complaints
,
808 _(".debug_line section has line "
809 "program sequence without an end"));
813 dwarf2_complex_location_expr_complaint (void)
815 complaint (&symfile_complaints
, _("location expression too complex"));
819 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
822 complaint (&symfile_complaints
,
823 _("const value length mismatch for '%s', got %d, expected %d"),
828 dwarf2_macros_too_long_complaint (struct dwarf2_section_info
*section
)
830 complaint (&symfile_complaints
,
831 _("macro info runs off end of `%s' section"),
832 section
->asection
->name
);
836 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
838 complaint (&symfile_complaints
,
839 _("macro debug info contains a "
840 "malformed macro definition:\n`%s'"),
845 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
847 complaint (&symfile_complaints
,
848 _("invalid attribute class or form for '%s' in '%s'"),
852 /* local function prototypes */
854 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
856 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
859 static void dwarf2_find_base_address (struct die_info
*die
,
860 struct dwarf2_cu
*cu
);
862 static void dwarf2_build_psymtabs_hard (struct objfile
*);
864 static void scan_partial_symbols (struct partial_die_info
*,
865 CORE_ADDR
*, CORE_ADDR
*,
866 int, struct dwarf2_cu
*);
868 static void add_partial_symbol (struct partial_die_info
*,
871 static void add_partial_namespace (struct partial_die_info
*pdi
,
872 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
873 int need_pc
, struct dwarf2_cu
*cu
);
875 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
876 CORE_ADDR
*highpc
, int need_pc
,
877 struct dwarf2_cu
*cu
);
879 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
880 struct dwarf2_cu
*cu
);
882 static void add_partial_subprogram (struct partial_die_info
*pdi
,
883 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
884 int need_pc
, struct dwarf2_cu
*cu
);
886 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
887 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
888 bfd
*abfd
, struct dwarf2_cu
*cu
);
890 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
892 static void psymtab_to_symtab_1 (struct partial_symtab
*);
894 static void dwarf2_read_abbrevs (struct dwarf2_cu
*cu
);
896 static void dwarf2_free_abbrev_table (void *);
898 static unsigned int peek_abbrev_code (bfd
*, gdb_byte
*);
900 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
903 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
906 static struct partial_die_info
*load_partial_dies (bfd
*,
907 gdb_byte
*, gdb_byte
*,
908 int, struct dwarf2_cu
*);
910 static gdb_byte
*read_partial_die (struct partial_die_info
*,
911 struct abbrev_info
*abbrev
,
913 gdb_byte
*, gdb_byte
*,
916 static struct partial_die_info
*find_partial_die (sect_offset
,
919 static void fixup_partial_die (struct partial_die_info
*,
922 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
923 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
925 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
926 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
928 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
930 static int read_1_signed_byte (bfd
*, gdb_byte
*);
932 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
934 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
936 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
938 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
941 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
943 static LONGEST read_checked_initial_length_and_offset
944 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
945 unsigned int *, unsigned int *);
947 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
950 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
952 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
954 static char *read_direct_string (bfd
*, gdb_byte
*, unsigned int *);
956 static char *read_indirect_string (bfd
*, gdb_byte
*,
957 const struct comp_unit_head
*,
960 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
962 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
964 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
966 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
968 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
971 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
975 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
976 struct dwarf2_cu
*cu
);
978 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
980 static struct die_info
*die_specification (struct die_info
*die
,
981 struct dwarf2_cu
**);
983 static void free_line_header (struct line_header
*lh
);
985 static void add_file_name (struct line_header
*, char *, unsigned int,
986 unsigned int, unsigned int);
988 static struct line_header
*(dwarf_decode_line_header
989 (unsigned int offset
,
990 bfd
*abfd
, struct dwarf2_cu
*cu
));
992 static void dwarf_decode_lines (struct line_header
*, const char *,
993 struct dwarf2_cu
*, struct partial_symtab
*,
996 static void dwarf2_start_subfile (char *, const char *, const char *);
998 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1001 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1002 struct dwarf2_cu
*, struct symbol
*);
1004 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
1005 struct dwarf2_cu
*);
1007 static void dwarf2_const_value_attr (struct attribute
*attr
,
1010 struct obstack
*obstack
,
1011 struct dwarf2_cu
*cu
, long *value
,
1013 struct dwarf2_locexpr_baton
**baton
);
1015 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1017 static int need_gnat_info (struct dwarf2_cu
*);
1019 static struct type
*die_descriptive_type (struct die_info
*,
1020 struct dwarf2_cu
*);
1022 static void set_descriptive_type (struct type
*, struct die_info
*,
1023 struct dwarf2_cu
*);
1025 static struct type
*die_containing_type (struct die_info
*,
1026 struct dwarf2_cu
*);
1028 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1029 struct dwarf2_cu
*);
1031 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1033 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1035 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1037 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1038 const char *suffix
, int physname
,
1039 struct dwarf2_cu
*cu
);
1041 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1043 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1045 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1047 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1049 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1051 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1052 struct dwarf2_cu
*, struct partial_symtab
*);
1054 static int dwarf2_get_pc_bounds (struct die_info
*,
1055 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1056 struct partial_symtab
*);
1058 static void get_scope_pc_bounds (struct die_info
*,
1059 CORE_ADDR
*, CORE_ADDR
*,
1060 struct dwarf2_cu
*);
1062 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1063 CORE_ADDR
, struct dwarf2_cu
*);
1065 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1066 struct dwarf2_cu
*);
1068 static void dwarf2_attach_fields_to_type (struct field_info
*,
1069 struct type
*, struct dwarf2_cu
*);
1071 static void dwarf2_add_member_fn (struct field_info
*,
1072 struct die_info
*, struct type
*,
1073 struct dwarf2_cu
*);
1075 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1077 struct dwarf2_cu
*);
1079 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1081 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1083 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1085 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1087 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1089 static struct type
*read_module_type (struct die_info
*die
,
1090 struct dwarf2_cu
*cu
);
1092 static const char *namespace_name (struct die_info
*die
,
1093 int *is_anonymous
, struct dwarf2_cu
*);
1095 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1097 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1099 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1100 struct dwarf2_cu
*);
1102 static struct die_info
*read_comp_unit (gdb_byte
*, struct dwarf2_cu
*);
1104 static struct die_info
*read_die_and_children_1 (const struct die_reader_specs
*reader
,
1106 gdb_byte
**new_info_ptr
,
1107 struct die_info
*parent
);
1109 static struct die_info
*read_die_and_children (const struct die_reader_specs
*reader
,
1111 gdb_byte
**new_info_ptr
,
1112 struct die_info
*parent
);
1114 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*reader
,
1116 gdb_byte
**new_info_ptr
,
1117 struct die_info
*parent
);
1119 static gdb_byte
*read_full_die (const struct die_reader_specs
*reader
,
1120 struct die_info
**, gdb_byte
*,
1123 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1125 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1128 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1130 static const char *dwarf2_full_name (char *name
,
1131 struct die_info
*die
,
1132 struct dwarf2_cu
*cu
);
1134 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1135 struct dwarf2_cu
**);
1137 static char *dwarf_tag_name (unsigned int);
1139 static char *dwarf_attr_name (unsigned int);
1141 static char *dwarf_form_name (unsigned int);
1143 static char *dwarf_bool_name (unsigned int);
1145 static char *dwarf_type_encoding_name (unsigned int);
1148 static char *dwarf_cfi_name (unsigned int);
1151 static struct die_info
*sibling_die (struct die_info
*);
1153 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1155 static void dump_die_for_error (struct die_info
*);
1157 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1160 /*static*/ void dump_die (struct die_info
*, int max_level
);
1162 static void store_in_ref_table (struct die_info
*,
1163 struct dwarf2_cu
*);
1165 static int is_ref_attr (struct attribute
*);
1167 static sect_offset
dwarf2_get_ref_die_offset (struct attribute
*);
1169 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1171 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1173 struct dwarf2_cu
**);
1175 static struct die_info
*follow_die_ref (struct die_info
*,
1177 struct dwarf2_cu
**);
1179 static struct die_info
*follow_die_sig (struct die_info
*,
1181 struct dwarf2_cu
**);
1183 static struct signatured_type
*lookup_signatured_type_at_offset
1184 (struct objfile
*objfile
,
1185 struct dwarf2_section_info
*section
, sect_offset offset
);
1187 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1189 static void read_signatured_type (struct signatured_type
*);
1191 /* memory allocation interface */
1193 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1195 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1197 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1199 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1200 char *, bfd
*, struct dwarf2_cu
*,
1201 struct dwarf2_section_info
*,
1204 static int attr_form_is_block (struct attribute
*);
1206 static int attr_form_is_section_offset (struct attribute
*);
1208 static int attr_form_is_constant (struct attribute
*);
1210 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1211 struct dwarf2_loclist_baton
*baton
,
1212 struct attribute
*attr
);
1214 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1216 struct dwarf2_cu
*cu
);
1218 static gdb_byte
*skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1219 struct abbrev_info
*abbrev
,
1220 struct dwarf2_cu
*cu
);
1222 static void free_stack_comp_unit (void *);
1224 static hashval_t
partial_die_hash (const void *item
);
1226 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1228 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1229 (sect_offset offset
, struct objfile
*objfile
);
1231 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1232 struct dwarf2_per_cu_data
*per_cu
);
1234 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1235 struct die_info
*comp_unit_die
);
1237 static void free_heap_comp_unit (void *);
1239 static void free_cached_comp_units (void *);
1241 static void age_cached_comp_units (void);
1243 static void free_one_cached_comp_unit (void *);
1245 static struct type
*set_die_type (struct die_info
*, struct type
*,
1246 struct dwarf2_cu
*);
1248 static void create_all_comp_units (struct objfile
*);
1250 static int create_all_type_units (struct objfile
*);
1252 static void load_full_comp_unit (struct dwarf2_per_cu_data
*);
1254 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1256 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1257 struct dwarf2_per_cu_data
*);
1259 static void dwarf2_mark (struct dwarf2_cu
*);
1261 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1263 static struct type
*get_die_type_at_offset (sect_offset
,
1264 struct dwarf2_per_cu_data
*per_cu
);
1266 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1268 static void dwarf2_release_queue (void *dummy
);
1270 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
);
1272 static void process_queue (void);
1274 static void find_file_and_directory (struct die_info
*die
,
1275 struct dwarf2_cu
*cu
,
1276 char **name
, char **comp_dir
);
1278 static char *file_full_name (int file
, struct line_header
*lh
,
1279 const char *comp_dir
);
1281 static gdb_byte
*read_and_check_comp_unit_head
1282 (struct comp_unit_head
*header
,
1283 struct dwarf2_section_info
*section
, gdb_byte
*info_ptr
,
1284 int is_debug_types_section
);
1286 static void init_cu_die_reader (struct die_reader_specs
*reader
,
1287 struct dwarf2_cu
*cu
);
1289 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1293 /* Convert VALUE between big- and little-endian. */
1295 byte_swap (offset_type value
)
1299 result
= (value
& 0xff) << 24;
1300 result
|= (value
& 0xff00) << 8;
1301 result
|= (value
& 0xff0000) >> 8;
1302 result
|= (value
& 0xff000000) >> 24;
1306 #define MAYBE_SWAP(V) byte_swap (V)
1309 #define MAYBE_SWAP(V) (V)
1310 #endif /* WORDS_BIGENDIAN */
1312 /* The suffix for an index file. */
1313 #define INDEX_SUFFIX ".gdb-index"
1315 static const char *dwarf2_physname (char *name
, struct die_info
*die
,
1316 struct dwarf2_cu
*cu
);
1318 /* Try to locate the sections we need for DWARF 2 debugging
1319 information and return true if we have enough to do something.
1320 NAMES points to the dwarf2 section names, or is NULL if the standard
1321 ELF names are used. */
1324 dwarf2_has_info (struct objfile
*objfile
,
1325 const struct dwarf2_debug_sections
*names
)
1327 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1328 if (!dwarf2_per_objfile
)
1330 /* Initialize per-objfile state. */
1331 struct dwarf2_per_objfile
*data
1332 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1334 memset (data
, 0, sizeof (*data
));
1335 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1336 dwarf2_per_objfile
= data
;
1338 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
1340 dwarf2_per_objfile
->objfile
= objfile
;
1342 return (dwarf2_per_objfile
->info
.asection
!= NULL
1343 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1346 /* When loading sections, we look either for uncompressed section or for
1347 compressed section names. */
1350 section_is_p (const char *section_name
,
1351 const struct dwarf2_section_names
*names
)
1353 if (names
->normal
!= NULL
1354 && strcmp (section_name
, names
->normal
) == 0)
1356 if (names
->compressed
!= NULL
1357 && strcmp (section_name
, names
->compressed
) == 0)
1362 /* This function is mapped across the sections and remembers the
1363 offset and size of each of the debugging sections we are interested
1367 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
1369 const struct dwarf2_debug_sections
*names
;
1372 names
= &dwarf2_elf_names
;
1374 names
= (const struct dwarf2_debug_sections
*) vnames
;
1376 if (section_is_p (sectp
->name
, &names
->info
))
1378 dwarf2_per_objfile
->info
.asection
= sectp
;
1379 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1381 else if (section_is_p (sectp
->name
, &names
->abbrev
))
1383 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1384 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1386 else if (section_is_p (sectp
->name
, &names
->line
))
1388 dwarf2_per_objfile
->line
.asection
= sectp
;
1389 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1391 else if (section_is_p (sectp
->name
, &names
->loc
))
1393 dwarf2_per_objfile
->loc
.asection
= sectp
;
1394 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1396 else if (section_is_p (sectp
->name
, &names
->macinfo
))
1398 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1399 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1401 else if (section_is_p (sectp
->name
, &names
->macro
))
1403 dwarf2_per_objfile
->macro
.asection
= sectp
;
1404 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
1406 else if (section_is_p (sectp
->name
, &names
->str
))
1408 dwarf2_per_objfile
->str
.asection
= sectp
;
1409 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1411 else if (section_is_p (sectp
->name
, &names
->frame
))
1413 dwarf2_per_objfile
->frame
.asection
= sectp
;
1414 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1416 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
1418 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1420 if (aflag
& SEC_HAS_CONTENTS
)
1422 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1423 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1426 else if (section_is_p (sectp
->name
, &names
->ranges
))
1428 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1429 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1431 else if (section_is_p (sectp
->name
, &names
->types
))
1433 struct dwarf2_section_info type_section
;
1435 memset (&type_section
, 0, sizeof (type_section
));
1436 type_section
.asection
= sectp
;
1437 type_section
.size
= bfd_get_section_size (sectp
);
1439 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
1442 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
1444 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1445 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1448 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1449 && bfd_section_vma (abfd
, sectp
) == 0)
1450 dwarf2_per_objfile
->has_section_at_zero
= 1;
1453 /* Decompress a section that was compressed using zlib. Store the
1454 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1457 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1458 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1460 bfd
*abfd
= objfile
->obfd
;
1462 error (_("Support for zlib-compressed DWARF data (from '%s') "
1463 "is disabled in this copy of GDB"),
1464 bfd_get_filename (abfd
));
1466 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1467 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1468 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1469 bfd_size_type uncompressed_size
;
1470 gdb_byte
*uncompressed_buffer
;
1473 int header_size
= 12;
1475 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1476 || bfd_bread (compressed_buffer
,
1477 compressed_size
, abfd
) != compressed_size
)
1478 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1479 bfd_get_filename (abfd
));
1481 /* Read the zlib header. In this case, it should be "ZLIB" followed
1482 by the uncompressed section size, 8 bytes in big-endian order. */
1483 if (compressed_size
< header_size
1484 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1485 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1486 bfd_get_filename (abfd
));
1487 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1488 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1489 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1490 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1491 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1492 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1493 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1494 uncompressed_size
+= compressed_buffer
[11];
1496 /* It is possible the section consists of several compressed
1497 buffers concatenated together, so we uncompress in a loop. */
1501 strm
.avail_in
= compressed_size
- header_size
;
1502 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1503 strm
.avail_out
= uncompressed_size
;
1504 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1506 rc
= inflateInit (&strm
);
1507 while (strm
.avail_in
> 0)
1510 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1511 bfd_get_filename (abfd
), rc
);
1512 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1513 + (uncompressed_size
- strm
.avail_out
));
1514 rc
= inflate (&strm
, Z_FINISH
);
1515 if (rc
!= Z_STREAM_END
)
1516 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1517 bfd_get_filename (abfd
), rc
);
1518 rc
= inflateReset (&strm
);
1520 rc
= inflateEnd (&strm
);
1522 || strm
.avail_out
!= 0)
1523 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1524 bfd_get_filename (abfd
), rc
);
1526 do_cleanups (cleanup
);
1527 *outbuf
= uncompressed_buffer
;
1528 *outsize
= uncompressed_size
;
1532 /* A helper function that decides whether a section is empty. */
1535 dwarf2_section_empty_p (struct dwarf2_section_info
*info
)
1537 return info
->asection
== NULL
|| info
->size
== 0;
1540 /* Read the contents of the section INFO from object file specified by
1541 OBJFILE, store info about the section into INFO.
1542 If the section is compressed, uncompress it before returning. */
1545 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1547 bfd
*abfd
= objfile
->obfd
;
1548 asection
*sectp
= info
->asection
;
1549 gdb_byte
*buf
, *retbuf
;
1550 unsigned char header
[4];
1554 info
->buffer
= NULL
;
1555 info
->map_addr
= NULL
;
1558 if (dwarf2_section_empty_p (info
))
1561 /* Check if the file has a 4-byte header indicating compression. */
1562 if (info
->size
> sizeof (header
)
1563 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1564 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1566 /* Upon decompression, update the buffer and its size. */
1567 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1569 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1577 pagesize
= getpagesize ();
1579 /* Only try to mmap sections which are large enough: we don't want to
1580 waste space due to fragmentation. Also, only try mmap for sections
1581 without relocations. */
1583 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1585 info
->buffer
= bfd_mmap (abfd
, 0, info
->size
, PROT_READ
,
1586 MAP_PRIVATE
, sectp
->filepos
,
1587 &info
->map_addr
, &info
->map_len
);
1589 if ((caddr_t
)info
->buffer
!= MAP_FAILED
)
1591 #if HAVE_POSIX_MADVISE
1592 posix_madvise (info
->map_addr
, info
->map_len
, POSIX_MADV_WILLNEED
);
1599 /* If we get here, we are a normal, not-compressed section. */
1601 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1603 /* When debugging .o files, we may need to apply relocations; see
1604 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1605 We never compress sections in .o files, so we only need to
1606 try this when the section is not compressed. */
1607 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1610 info
->buffer
= retbuf
;
1614 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1615 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1616 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1617 bfd_get_filename (abfd
));
1620 /* A helper function that returns the size of a section in a safe way.
1621 If you are positive that the section has been read before using the
1622 size, then it is safe to refer to the dwarf2_section_info object's
1623 "size" field directly. In other cases, you must call this
1624 function, because for compressed sections the size field is not set
1625 correctly until the section has been read. */
1627 static bfd_size_type
1628 dwarf2_section_size (struct objfile
*objfile
,
1629 struct dwarf2_section_info
*info
)
1632 dwarf2_read_section (objfile
, info
);
1636 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1640 dwarf2_get_section_info (struct objfile
*objfile
,
1641 enum dwarf2_section_enum sect
,
1642 asection
**sectp
, gdb_byte
**bufp
,
1643 bfd_size_type
*sizep
)
1645 struct dwarf2_per_objfile
*data
1646 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1647 struct dwarf2_section_info
*info
;
1649 /* We may see an objfile without any DWARF, in which case we just
1660 case DWARF2_DEBUG_FRAME
:
1661 info
= &data
->frame
;
1663 case DWARF2_EH_FRAME
:
1664 info
= &data
->eh_frame
;
1667 gdb_assert_not_reached ("unexpected section");
1670 dwarf2_read_section (objfile
, info
);
1672 *sectp
= info
->asection
;
1673 *bufp
= info
->buffer
;
1674 *sizep
= info
->size
;
1678 /* DWARF quick_symbols_functions support. */
1680 /* TUs can share .debug_line entries, and there can be a lot more TUs than
1681 unique line tables, so we maintain a separate table of all .debug_line
1682 derived entries to support the sharing.
1683 All the quick functions need is the list of file names. We discard the
1684 line_header when we're done and don't need to record it here. */
1685 struct quick_file_names
1687 /* The offset in .debug_line of the line table. We hash on this. */
1688 unsigned int offset
;
1690 /* The number of entries in file_names, real_names. */
1691 unsigned int num_file_names
;
1693 /* The file names from the line table, after being run through
1695 const char **file_names
;
1697 /* The file names from the line table after being run through
1698 gdb_realpath. These are computed lazily. */
1699 const char **real_names
;
1702 /* When using the index (and thus not using psymtabs), each CU has an
1703 object of this type. This is used to hold information needed by
1704 the various "quick" methods. */
1705 struct dwarf2_per_cu_quick_data
1707 /* The file table. This can be NULL if there was no file table
1708 or it's currently not read in.
1709 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
1710 struct quick_file_names
*file_names
;
1712 /* The corresponding symbol table. This is NULL if symbols for this
1713 CU have not yet been read. */
1714 struct symtab
*symtab
;
1716 /* A temporary mark bit used when iterating over all CUs in
1717 expand_symtabs_matching. */
1718 unsigned int mark
: 1;
1720 /* True if we've tried to read the file table and found there isn't one.
1721 There will be no point in trying to read it again next time. */
1722 unsigned int no_file_data
: 1;
1725 /* Hash function for a quick_file_names. */
1728 hash_file_name_entry (const void *e
)
1730 const struct quick_file_names
*file_data
= e
;
1732 return file_data
->offset
;
1735 /* Equality function for a quick_file_names. */
1738 eq_file_name_entry (const void *a
, const void *b
)
1740 const struct quick_file_names
*ea
= a
;
1741 const struct quick_file_names
*eb
= b
;
1743 return ea
->offset
== eb
->offset
;
1746 /* Delete function for a quick_file_names. */
1749 delete_file_name_entry (void *e
)
1751 struct quick_file_names
*file_data
= e
;
1754 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
1756 xfree ((void*) file_data
->file_names
[i
]);
1757 if (file_data
->real_names
)
1758 xfree ((void*) file_data
->real_names
[i
]);
1761 /* The space for the struct itself lives on objfile_obstack,
1762 so we don't free it here. */
1765 /* Create a quick_file_names hash table. */
1768 create_quick_file_names_table (unsigned int nr_initial_entries
)
1770 return htab_create_alloc (nr_initial_entries
,
1771 hash_file_name_entry
, eq_file_name_entry
,
1772 delete_file_name_entry
, xcalloc
, xfree
);
1775 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
1776 have to be created afterwards. You should call age_cached_comp_units after
1777 processing PER_CU->CU. dw2_setup must have been already called. */
1780 load_cu (struct dwarf2_per_cu_data
*per_cu
)
1782 if (per_cu
->debug_types_section
)
1783 load_full_type_unit (per_cu
);
1785 load_full_comp_unit (per_cu
);
1787 gdb_assert (per_cu
->cu
!= NULL
);
1789 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
1792 /* Read in the symbols for PER_CU. */
1795 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
1797 struct cleanup
*back_to
;
1799 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
1801 queue_comp_unit (per_cu
);
1807 /* Age the cache, releasing compilation units that have not
1808 been used recently. */
1809 age_cached_comp_units ();
1811 do_cleanups (back_to
);
1814 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
1815 the objfile from which this CU came. Returns the resulting symbol
1818 static struct symtab
*
1819 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
1821 if (!per_cu
->v
.quick
->symtab
)
1823 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
1824 increment_reading_symtab ();
1825 dw2_do_instantiate_symtab (per_cu
);
1826 do_cleanups (back_to
);
1828 return per_cu
->v
.quick
->symtab
;
1831 /* Return the CU given its index. */
1833 static struct dwarf2_per_cu_data
*
1834 dw2_get_cu (int index
)
1836 if (index
>= dwarf2_per_objfile
->n_comp_units
)
1838 index
-= dwarf2_per_objfile
->n_comp_units
;
1839 return dwarf2_per_objfile
->all_type_units
[index
];
1841 return dwarf2_per_objfile
->all_comp_units
[index
];
1844 /* A helper function that knows how to read a 64-bit value in a way
1845 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
1849 extract_cu_value (const char *bytes
, ULONGEST
*result
)
1851 if (sizeof (ULONGEST
) < 8)
1855 /* Ignore the upper 4 bytes if they are all zero. */
1856 for (i
= 0; i
< 4; ++i
)
1857 if (bytes
[i
+ 4] != 0)
1860 *result
= extract_unsigned_integer (bytes
, 4, BFD_ENDIAN_LITTLE
);
1863 *result
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
1867 /* Read the CU list from the mapped index, and use it to create all
1868 the CU objects for this objfile. Return 0 if something went wrong,
1869 1 if everything went ok. */
1872 create_cus_from_index (struct objfile
*objfile
, const gdb_byte
*cu_list
,
1873 offset_type cu_list_elements
)
1877 dwarf2_per_objfile
->n_comp_units
= cu_list_elements
/ 2;
1878 dwarf2_per_objfile
->all_comp_units
1879 = obstack_alloc (&objfile
->objfile_obstack
,
1880 dwarf2_per_objfile
->n_comp_units
1881 * sizeof (struct dwarf2_per_cu_data
*));
1883 for (i
= 0; i
< cu_list_elements
; i
+= 2)
1885 struct dwarf2_per_cu_data
*the_cu
;
1886 ULONGEST offset
, length
;
1888 if (!extract_cu_value (cu_list
, &offset
)
1889 || !extract_cu_value (cu_list
+ 8, &length
))
1893 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1894 struct dwarf2_per_cu_data
);
1895 the_cu
->offset
.sect_off
= offset
;
1896 the_cu
->length
= length
;
1897 the_cu
->objfile
= objfile
;
1898 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1899 struct dwarf2_per_cu_quick_data
);
1900 dwarf2_per_objfile
->all_comp_units
[i
/ 2] = the_cu
;
1906 /* Create the signatured type hash table from the index. */
1909 create_signatured_type_table_from_index (struct objfile
*objfile
,
1910 struct dwarf2_section_info
*section
,
1911 const gdb_byte
*bytes
,
1912 offset_type elements
)
1915 htab_t sig_types_hash
;
1917 dwarf2_per_objfile
->n_type_units
= elements
/ 3;
1918 dwarf2_per_objfile
->all_type_units
1919 = obstack_alloc (&objfile
->objfile_obstack
,
1920 dwarf2_per_objfile
->n_type_units
1921 * sizeof (struct dwarf2_per_cu_data
*));
1923 sig_types_hash
= allocate_signatured_type_table (objfile
);
1925 for (i
= 0; i
< elements
; i
+= 3)
1927 struct signatured_type
*sig_type
;
1928 ULONGEST offset
, type_offset_in_tu
, signature
;
1931 if (!extract_cu_value (bytes
, &offset
)
1932 || !extract_cu_value (bytes
+ 8, &type_offset_in_tu
))
1934 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
1937 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1938 struct signatured_type
);
1939 sig_type
->signature
= signature
;
1940 sig_type
->type_offset
.cu_off
= type_offset_in_tu
;
1941 sig_type
->per_cu
.debug_types_section
= section
;
1942 sig_type
->per_cu
.offset
.sect_off
= offset
;
1943 sig_type
->per_cu
.objfile
= objfile
;
1944 sig_type
->per_cu
.v
.quick
1945 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1946 struct dwarf2_per_cu_quick_data
);
1948 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
1951 dwarf2_per_objfile
->all_type_units
[i
/ 3] = &sig_type
->per_cu
;
1954 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
1959 /* Read the address map data from the mapped index, and use it to
1960 populate the objfile's psymtabs_addrmap. */
1963 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
1965 const gdb_byte
*iter
, *end
;
1966 struct obstack temp_obstack
;
1967 struct addrmap
*mutable_map
;
1968 struct cleanup
*cleanup
;
1971 obstack_init (&temp_obstack
);
1972 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
1973 mutable_map
= addrmap_create_mutable (&temp_obstack
);
1975 iter
= index
->address_table
;
1976 end
= iter
+ index
->address_table_size
;
1978 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1982 ULONGEST hi
, lo
, cu_index
;
1983 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
1985 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
1987 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
1990 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
1991 dw2_get_cu (cu_index
));
1994 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
1995 &objfile
->objfile_obstack
);
1996 do_cleanups (cleanup
);
1999 /* The hash function for strings in the mapped index. This is the same as
2000 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2001 implementation. This is necessary because the hash function is tied to the
2002 format of the mapped index file. The hash values do not have to match with
2005 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2008 mapped_index_string_hash (int index_version
, const void *p
)
2010 const unsigned char *str
= (const unsigned char *) p
;
2014 while ((c
= *str
++) != 0)
2016 if (index_version
>= 5)
2018 r
= r
* 67 + c
- 113;
2024 /* Find a slot in the mapped index INDEX for the object named NAME.
2025 If NAME is found, set *VEC_OUT to point to the CU vector in the
2026 constant pool and return 1. If NAME cannot be found, return 0. */
2029 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2030 offset_type
**vec_out
)
2032 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2034 offset_type slot
, step
;
2035 int (*cmp
) (const char *, const char *);
2037 if (current_language
->la_language
== language_cplus
2038 || current_language
->la_language
== language_java
2039 || current_language
->la_language
== language_fortran
)
2041 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2043 const char *paren
= strchr (name
, '(');
2049 dup
= xmalloc (paren
- name
+ 1);
2050 memcpy (dup
, name
, paren
- name
);
2051 dup
[paren
- name
] = 0;
2053 make_cleanup (xfree
, dup
);
2058 /* Index version 4 did not support case insensitive searches. But the
2059 indices for case insensitive languages are built in lowercase, therefore
2060 simulate our NAME being searched is also lowercased. */
2061 hash
= mapped_index_string_hash ((index
->version
== 4
2062 && case_sensitivity
== case_sensitive_off
2063 ? 5 : index
->version
),
2066 slot
= hash
& (index
->symbol_table_slots
- 1);
2067 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
2068 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2072 /* Convert a slot number to an offset into the table. */
2073 offset_type i
= 2 * slot
;
2075 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
2077 do_cleanups (back_to
);
2081 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
2082 if (!cmp (name
, str
))
2084 *vec_out
= (offset_type
*) (index
->constant_pool
2085 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
2086 do_cleanups (back_to
);
2090 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
2094 /* Read the index file. If everything went ok, initialize the "quick"
2095 elements of all the CUs and return 1. Otherwise, return 0. */
2098 dwarf2_read_index (struct objfile
*objfile
)
2101 struct mapped_index
*map
;
2102 offset_type
*metadata
;
2103 const gdb_byte
*cu_list
;
2104 const gdb_byte
*types_list
= NULL
;
2105 offset_type version
, cu_list_elements
;
2106 offset_type types_list_elements
= 0;
2109 if (dwarf2_section_empty_p (&dwarf2_per_objfile
->gdb_index
))
2112 /* Older elfutils strip versions could keep the section in the main
2113 executable while splitting it for the separate debug info file. */
2114 if ((bfd_get_file_flags (dwarf2_per_objfile
->gdb_index
.asection
)
2115 & SEC_HAS_CONTENTS
) == 0)
2118 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->gdb_index
);
2120 addr
= dwarf2_per_objfile
->gdb_index
.buffer
;
2121 /* Version check. */
2122 version
= MAYBE_SWAP (*(offset_type
*) addr
);
2123 /* Versions earlier than 3 emitted every copy of a psymbol. This
2124 causes the index to behave very poorly for certain requests. Version 3
2125 contained incomplete addrmap. So, it seems better to just ignore such
2129 static int warning_printed
= 0;
2130 if (!warning_printed
)
2132 warning (_("Skipping obsolete .gdb_index section in %s."),
2134 warning_printed
= 1;
2138 /* Index version 4 uses a different hash function than index version
2141 Versions earlier than 6 did not emit psymbols for inlined
2142 functions. Using these files will cause GDB not to be able to
2143 set breakpoints on inlined functions by name, so we ignore these
2144 indices unless the --use-deprecated-index-sections command line
2145 option was supplied. */
2146 if (version
< 6 && !use_deprecated_index_sections
)
2148 static int warning_printed
= 0;
2149 if (!warning_printed
)
2151 warning (_("Skipping deprecated .gdb_index section in %s, pass "
2152 "--use-deprecated-index-sections to use them anyway"),
2154 warning_printed
= 1;
2158 /* Indexes with higher version than the one supported by GDB may be no
2159 longer backward compatible. */
2163 map
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct mapped_index
);
2164 map
->version
= version
;
2165 map
->total_size
= dwarf2_per_objfile
->gdb_index
.size
;
2167 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2170 cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2171 cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2175 types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2176 types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2177 - MAYBE_SWAP (metadata
[i
]))
2181 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2182 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
2183 - MAYBE_SWAP (metadata
[i
]));
2186 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
2187 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
2188 - MAYBE_SWAP (metadata
[i
]))
2189 / (2 * sizeof (offset_type
)));
2192 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
2194 if (!create_cus_from_index (objfile
, cu_list
, cu_list_elements
))
2197 if (types_list_elements
)
2199 struct dwarf2_section_info
*section
;
2201 /* We can only handle a single .debug_types when we have an
2203 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
2206 section
= VEC_index (dwarf2_section_info_def
,
2207 dwarf2_per_objfile
->types
, 0);
2209 if (!create_signatured_type_table_from_index (objfile
, section
,
2211 types_list_elements
))
2215 create_addrmap_from_index (objfile
, map
);
2217 dwarf2_per_objfile
->index_table
= map
;
2218 dwarf2_per_objfile
->using_index
= 1;
2219 dwarf2_per_objfile
->quick_file_names_table
=
2220 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2225 /* A helper for the "quick" functions which sets the global
2226 dwarf2_per_objfile according to OBJFILE. */
2229 dw2_setup (struct objfile
*objfile
)
2231 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2232 gdb_assert (dwarf2_per_objfile
);
2235 /* A helper for the "quick" functions which attempts to read the line
2236 table for THIS_CU. */
2238 static struct quick_file_names
*
2239 dw2_get_file_names (struct objfile
*objfile
,
2240 struct dwarf2_per_cu_data
*this_cu
)
2242 bfd
*abfd
= objfile
->obfd
;
2243 struct line_header
*lh
;
2244 struct attribute
*attr
;
2245 struct cleanup
*cleanups
;
2246 struct die_info
*comp_unit_die
;
2247 struct dwarf2_section_info
* sec
;
2249 int has_children
, i
;
2250 struct dwarf2_cu cu
;
2251 unsigned int bytes_read
;
2252 struct die_reader_specs reader_specs
;
2253 char *name
, *comp_dir
;
2255 struct quick_file_names
*qfn
;
2256 unsigned int line_offset
;
2258 if (this_cu
->v
.quick
->file_names
!= NULL
)
2259 return this_cu
->v
.quick
->file_names
;
2260 /* If we know there is no line data, no point in looking again. */
2261 if (this_cu
->v
.quick
->no_file_data
)
2264 init_one_comp_unit (&cu
, this_cu
);
2265 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
2267 if (this_cu
->debug_types_section
)
2268 sec
= this_cu
->debug_types_section
;
2270 sec
= &dwarf2_per_objfile
->info
;
2271 dwarf2_read_section (objfile
, sec
);
2272 info_ptr
= sec
->buffer
+ this_cu
->offset
.sect_off
;
2274 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, sec
, info_ptr
,
2275 this_cu
->debug_types_section
!= NULL
);
2277 /* Skip dummy compilation units. */
2278 if (info_ptr
>= (sec
->buffer
+ sec
->size
)
2279 || peek_abbrev_code (abfd
, info_ptr
) == 0)
2281 do_cleanups (cleanups
);
2285 dwarf2_read_abbrevs (&cu
);
2286 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
2288 init_cu_die_reader (&reader_specs
, &cu
);
2289 read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2295 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, &cu
);
2298 struct quick_file_names find_entry
;
2300 line_offset
= DW_UNSND (attr
);
2302 /* We may have already read in this line header (TU line header sharing).
2303 If we have we're done. */
2304 find_entry
.offset
= line_offset
;
2305 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
2306 &find_entry
, INSERT
);
2309 do_cleanups (cleanups
);
2310 this_cu
->v
.quick
->file_names
= *slot
;
2314 lh
= dwarf_decode_line_header (line_offset
, abfd
, &cu
);
2318 do_cleanups (cleanups
);
2319 this_cu
->v
.quick
->no_file_data
= 1;
2323 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
2324 qfn
->offset
= line_offset
;
2325 gdb_assert (slot
!= NULL
);
2328 find_file_and_directory (comp_unit_die
, &cu
, &name
, &comp_dir
);
2330 qfn
->num_file_names
= lh
->num_file_names
;
2331 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
2332 lh
->num_file_names
* sizeof (char *));
2333 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2334 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2335 qfn
->real_names
= NULL
;
2337 free_line_header (lh
);
2338 do_cleanups (cleanups
);
2340 this_cu
->v
.quick
->file_names
= qfn
;
2344 /* A helper for the "quick" functions which computes and caches the
2345 real path for a given file name from the line table. */
2348 dw2_get_real_path (struct objfile
*objfile
,
2349 struct quick_file_names
*qfn
, int index
)
2351 if (qfn
->real_names
== NULL
)
2352 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2353 qfn
->num_file_names
, sizeof (char *));
2355 if (qfn
->real_names
[index
] == NULL
)
2356 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
2358 return qfn
->real_names
[index
];
2361 static struct symtab
*
2362 dw2_find_last_source_symtab (struct objfile
*objfile
)
2366 dw2_setup (objfile
);
2367 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2368 return dw2_instantiate_symtab (dw2_get_cu (index
));
2371 /* Traversal function for dw2_forget_cached_source_info. */
2374 dw2_free_cached_file_names (void **slot
, void *info
)
2376 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
2378 if (file_data
->real_names
)
2382 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2384 xfree ((void*) file_data
->real_names
[i
]);
2385 file_data
->real_names
[i
] = NULL
;
2393 dw2_forget_cached_source_info (struct objfile
*objfile
)
2395 dw2_setup (objfile
);
2397 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
2398 dw2_free_cached_file_names
, NULL
);
2401 /* Helper function for dw2_map_symtabs_matching_filename that expands
2402 the symtabs and calls the iterator. */
2405 dw2_map_expand_apply (struct objfile
*objfile
,
2406 struct dwarf2_per_cu_data
*per_cu
,
2408 const char *full_path
, const char *real_path
,
2409 int (*callback
) (struct symtab
*, void *),
2412 struct symtab
*last_made
= objfile
->symtabs
;
2414 /* Don't visit already-expanded CUs. */
2415 if (per_cu
->v
.quick
->symtab
)
2418 /* This may expand more than one symtab, and we want to iterate over
2420 dw2_instantiate_symtab (per_cu
);
2422 return iterate_over_some_symtabs (name
, full_path
, real_path
, callback
, data
,
2423 objfile
->symtabs
, last_made
);
2426 /* Implementation of the map_symtabs_matching_filename method. */
2429 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
2430 const char *full_path
, const char *real_path
,
2431 int (*callback
) (struct symtab
*, void *),
2435 const char *name_basename
= lbasename (name
);
2436 int name_len
= strlen (name
);
2437 int is_abs
= IS_ABSOLUTE_PATH (name
);
2439 dw2_setup (objfile
);
2441 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2442 + dwarf2_per_objfile
->n_type_units
); ++i
)
2445 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2446 struct quick_file_names
*file_data
;
2448 /* We only need to look at symtabs not already expanded. */
2449 if (per_cu
->v
.quick
->symtab
)
2452 file_data
= dw2_get_file_names (objfile
, per_cu
);
2453 if (file_data
== NULL
)
2456 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2458 const char *this_name
= file_data
->file_names
[j
];
2460 if (FILENAME_CMP (name
, this_name
) == 0
2461 || (!is_abs
&& compare_filenames_for_search (this_name
,
2464 if (dw2_map_expand_apply (objfile
, per_cu
,
2465 name
, full_path
, real_path
,
2470 /* Before we invoke realpath, which can get expensive when many
2471 files are involved, do a quick comparison of the basenames. */
2472 if (! basenames_may_differ
2473 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
2476 if (full_path
!= NULL
)
2478 const char *this_real_name
= dw2_get_real_path (objfile
,
2481 if (this_real_name
!= NULL
2482 && (FILENAME_CMP (full_path
, this_real_name
) == 0
2484 && compare_filenames_for_search (this_real_name
,
2487 if (dw2_map_expand_apply (objfile
, per_cu
,
2488 name
, full_path
, real_path
,
2494 if (real_path
!= NULL
)
2496 const char *this_real_name
= dw2_get_real_path (objfile
,
2499 if (this_real_name
!= NULL
2500 && (FILENAME_CMP (real_path
, this_real_name
) == 0
2502 && compare_filenames_for_search (this_real_name
,
2505 if (dw2_map_expand_apply (objfile
, per_cu
,
2506 name
, full_path
, real_path
,
2517 static struct symtab
*
2518 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
2519 const char *name
, domain_enum domain
)
2521 /* We do all the work in the pre_expand_symtabs_matching hook
2526 /* A helper function that expands all symtabs that hold an object
2530 dw2_do_expand_symtabs_matching (struct objfile
*objfile
, const char *name
)
2532 dw2_setup (objfile
);
2534 /* index_table is NULL if OBJF_READNOW. */
2535 if (dwarf2_per_objfile
->index_table
)
2539 if (find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2542 offset_type i
, len
= MAYBE_SWAP (*vec
);
2543 for (i
= 0; i
< len
; ++i
)
2545 offset_type cu_index
= MAYBE_SWAP (vec
[i
+ 1]);
2546 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
2548 dw2_instantiate_symtab (per_cu
);
2555 dw2_pre_expand_symtabs_matching (struct objfile
*objfile
,
2556 enum block_enum block_kind
, const char *name
,
2559 dw2_do_expand_symtabs_matching (objfile
, name
);
2563 dw2_print_stats (struct objfile
*objfile
)
2567 dw2_setup (objfile
);
2569 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2570 + dwarf2_per_objfile
->n_type_units
); ++i
)
2572 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2574 if (!per_cu
->v
.quick
->symtab
)
2577 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
2581 dw2_dump (struct objfile
*objfile
)
2583 /* Nothing worth printing. */
2587 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
2588 struct section_offsets
*delta
)
2590 /* There's nothing to relocate here. */
2594 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
2595 const char *func_name
)
2597 dw2_do_expand_symtabs_matching (objfile
, func_name
);
2601 dw2_expand_all_symtabs (struct objfile
*objfile
)
2605 dw2_setup (objfile
);
2607 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2608 + dwarf2_per_objfile
->n_type_units
); ++i
)
2610 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2612 dw2_instantiate_symtab (per_cu
);
2617 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
2618 const char *filename
)
2622 dw2_setup (objfile
);
2624 /* We don't need to consider type units here.
2625 This is only called for examining code, e.g. expand_line_sal.
2626 There can be an order of magnitude (or more) more type units
2627 than comp units, and we avoid them if we can. */
2629 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
2632 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2633 struct quick_file_names
*file_data
;
2635 /* We only need to look at symtabs not already expanded. */
2636 if (per_cu
->v
.quick
->symtab
)
2639 file_data
= dw2_get_file_names (objfile
, per_cu
);
2640 if (file_data
== NULL
)
2643 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2645 const char *this_name
= file_data
->file_names
[j
];
2646 if (FILENAME_CMP (this_name
, filename
) == 0)
2648 dw2_instantiate_symtab (per_cu
);
2656 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
2658 struct dwarf2_per_cu_data
*per_cu
;
2660 struct quick_file_names
*file_data
;
2662 dw2_setup (objfile
);
2664 /* index_table is NULL if OBJF_READNOW. */
2665 if (!dwarf2_per_objfile
->index_table
)
2669 ALL_OBJFILE_SYMTABS (objfile
, s
)
2672 struct blockvector
*bv
= BLOCKVECTOR (s
);
2673 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2674 struct symbol
*sym
= lookup_block_symbol (block
, name
, VAR_DOMAIN
);
2677 return sym
->symtab
->filename
;
2682 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2686 /* Note that this just looks at the very first one named NAME -- but
2687 actually we are looking for a function. find_main_filename
2688 should be rewritten so that it doesn't require a custom hook. It
2689 could just use the ordinary symbol tables. */
2690 /* vec[0] is the length, which must always be >0. */
2691 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[1]));
2693 file_data
= dw2_get_file_names (objfile
, per_cu
);
2694 if (file_data
== NULL
)
2697 return file_data
->file_names
[file_data
->num_file_names
- 1];
2701 dw2_map_matching_symbols (const char * name
, domain_enum
namespace,
2702 struct objfile
*objfile
, int global
,
2703 int (*callback
) (struct block
*,
2704 struct symbol
*, void *),
2705 void *data
, symbol_compare_ftype
*match
,
2706 symbol_compare_ftype
*ordered_compare
)
2708 /* Currently unimplemented; used for Ada. The function can be called if the
2709 current language is Ada for a non-Ada objfile using GNU index. As Ada
2710 does not look for non-Ada symbols this function should just return. */
2714 dw2_expand_symtabs_matching
2715 (struct objfile
*objfile
,
2716 int (*file_matcher
) (const char *, void *),
2717 int (*name_matcher
) (const char *, void *),
2718 enum search_domain kind
,
2723 struct mapped_index
*index
;
2725 dw2_setup (objfile
);
2727 /* index_table is NULL if OBJF_READNOW. */
2728 if (!dwarf2_per_objfile
->index_table
)
2730 index
= dwarf2_per_objfile
->index_table
;
2732 if (file_matcher
!= NULL
)
2734 struct cleanup
*cleanup
;
2735 htab_t visited_found
, visited_not_found
;
2737 visited_found
= htab_create_alloc (10,
2738 htab_hash_pointer
, htab_eq_pointer
,
2739 NULL
, xcalloc
, xfree
);
2740 cleanup
= make_cleanup_htab_delete (visited_found
);
2741 visited_not_found
= htab_create_alloc (10,
2742 htab_hash_pointer
, htab_eq_pointer
,
2743 NULL
, xcalloc
, xfree
);
2744 make_cleanup_htab_delete (visited_not_found
);
2746 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2747 + dwarf2_per_objfile
->n_type_units
); ++i
)
2750 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2751 struct quick_file_names
*file_data
;
2754 per_cu
->v
.quick
->mark
= 0;
2756 /* We only need to look at symtabs not already expanded. */
2757 if (per_cu
->v
.quick
->symtab
)
2760 file_data
= dw2_get_file_names (objfile
, per_cu
);
2761 if (file_data
== NULL
)
2764 if (htab_find (visited_not_found
, file_data
) != NULL
)
2766 else if (htab_find (visited_found
, file_data
) != NULL
)
2768 per_cu
->v
.quick
->mark
= 1;
2772 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2774 if (file_matcher (file_data
->file_names
[j
], data
))
2776 per_cu
->v
.quick
->mark
= 1;
2781 slot
= htab_find_slot (per_cu
->v
.quick
->mark
2783 : visited_not_found
,
2788 do_cleanups (cleanup
);
2791 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
2793 offset_type idx
= 2 * iter
;
2795 offset_type
*vec
, vec_len
, vec_idx
;
2797 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
2800 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
2802 if (! (*name_matcher
) (name
, data
))
2805 /* The name was matched, now expand corresponding CUs that were
2807 vec
= (offset_type
*) (index
->constant_pool
2808 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
2809 vec_len
= MAYBE_SWAP (vec
[0]);
2810 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
2812 struct dwarf2_per_cu_data
*per_cu
;
2814 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[vec_idx
+ 1]));
2815 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
2816 dw2_instantiate_symtab (per_cu
);
2821 static struct symtab
*
2822 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
2823 struct minimal_symbol
*msymbol
,
2825 struct obj_section
*section
,
2828 struct dwarf2_per_cu_data
*data
;
2830 dw2_setup (objfile
);
2832 if (!objfile
->psymtabs_addrmap
)
2835 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
2839 if (warn_if_readin
&& data
->v
.quick
->symtab
)
2840 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
2841 paddress (get_objfile_arch (objfile
), pc
));
2843 return dw2_instantiate_symtab (data
);
2847 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
2848 void *data
, int need_fullname
)
2851 struct cleanup
*cleanup
;
2852 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
2853 NULL
, xcalloc
, xfree
);
2855 cleanup
= make_cleanup_htab_delete (visited
);
2856 dw2_setup (objfile
);
2858 /* We can ignore file names coming from already-expanded CUs. */
2859 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2860 + dwarf2_per_objfile
->n_type_units
); ++i
)
2862 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2864 if (per_cu
->v
.quick
->symtab
)
2866 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
2869 *slot
= per_cu
->v
.quick
->file_names
;
2873 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2874 + dwarf2_per_objfile
->n_type_units
); ++i
)
2877 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2878 struct quick_file_names
*file_data
;
2881 /* We only need to look at symtabs not already expanded. */
2882 if (per_cu
->v
.quick
->symtab
)
2885 file_data
= dw2_get_file_names (objfile
, per_cu
);
2886 if (file_data
== NULL
)
2889 slot
= htab_find_slot (visited
, file_data
, INSERT
);
2892 /* Already visited. */
2897 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2899 const char *this_real_name
;
2902 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
2904 this_real_name
= NULL
;
2905 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
2909 do_cleanups (cleanup
);
2913 dw2_has_symbols (struct objfile
*objfile
)
2918 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
2921 dw2_find_last_source_symtab
,
2922 dw2_forget_cached_source_info
,
2923 dw2_map_symtabs_matching_filename
,
2925 dw2_pre_expand_symtabs_matching
,
2929 dw2_expand_symtabs_for_function
,
2930 dw2_expand_all_symtabs
,
2931 dw2_expand_symtabs_with_filename
,
2932 dw2_find_symbol_file
,
2933 dw2_map_matching_symbols
,
2934 dw2_expand_symtabs_matching
,
2935 dw2_find_pc_sect_symtab
,
2936 dw2_map_symbol_filenames
2939 /* Initialize for reading DWARF for this objfile. Return 0 if this
2940 file will use psymtabs, or 1 if using the GNU index. */
2943 dwarf2_initialize_objfile (struct objfile
*objfile
)
2945 /* If we're about to read full symbols, don't bother with the
2946 indices. In this case we also don't care if some other debug
2947 format is making psymtabs, because they are all about to be
2949 if ((objfile
->flags
& OBJF_READNOW
))
2953 dwarf2_per_objfile
->using_index
= 1;
2954 create_all_comp_units (objfile
);
2955 create_all_type_units (objfile
);
2956 dwarf2_per_objfile
->quick_file_names_table
=
2957 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2959 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2960 + dwarf2_per_objfile
->n_type_units
); ++i
)
2962 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2964 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2965 struct dwarf2_per_cu_quick_data
);
2968 /* Return 1 so that gdb sees the "quick" functions. However,
2969 these functions will be no-ops because we will have expanded
2974 if (dwarf2_read_index (objfile
))
2982 /* Build a partial symbol table. */
2985 dwarf2_build_psymtabs (struct objfile
*objfile
)
2987 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
2989 init_psymbol_list (objfile
, 1024);
2992 dwarf2_build_psymtabs_hard (objfile
);
2995 /* Return TRUE if OFFSET is within CU_HEADER. */
2998 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
3000 sect_offset bottom
= { cu_header
->offset
.sect_off
};
3001 sect_offset top
= { (cu_header
->offset
.sect_off
+ cu_header
->length
3002 + cu_header
->initial_length_size
) };
3004 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
3007 /* Read in the comp unit header information from the debug_info at info_ptr.
3008 NOTE: This leaves members offset, first_die_offset to be filled in
3012 read_comp_unit_head (struct comp_unit_head
*cu_header
,
3013 gdb_byte
*info_ptr
, bfd
*abfd
)
3016 unsigned int bytes_read
;
3018 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
3019 cu_header
->initial_length_size
= bytes_read
;
3020 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
3021 info_ptr
+= bytes_read
;
3022 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
3024 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
3026 info_ptr
+= bytes_read
;
3027 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
3029 signed_addr
= bfd_get_sign_extend_vma (abfd
);
3030 if (signed_addr
< 0)
3031 internal_error (__FILE__
, __LINE__
,
3032 _("read_comp_unit_head: dwarf from non elf file"));
3033 cu_header
->signed_addr_p
= signed_addr
;
3038 /* Subroutine of read_and_check_comp_unit_head and
3039 read_and_check_type_unit_head to simplify them.
3040 Perform various error checking on the header. */
3043 error_check_comp_unit_head (struct comp_unit_head
*header
,
3044 struct dwarf2_section_info
*section
)
3046 bfd
*abfd
= section
->asection
->owner
;
3047 const char *filename
= bfd_get_filename (abfd
);
3049 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
3050 error (_("Dwarf Error: wrong version in compilation unit header "
3051 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
3054 if (header
->abbrev_offset
.sect_off
3055 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
,
3056 &dwarf2_per_objfile
->abbrev
))
3057 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
3058 "(offset 0x%lx + 6) [in module %s]"),
3059 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
3062 /* Cast to unsigned long to use 64-bit arithmetic when possible to
3063 avoid potential 32-bit overflow. */
3064 if (((unsigned long) header
->offset
.sect_off
3065 + header
->length
+ header
->initial_length_size
)
3067 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
3068 "(offset 0x%lx + 0) [in module %s]"),
3069 (long) header
->length
, (long) header
->offset
.sect_off
,
3073 /* Read in a CU/TU header and perform some basic error checking.
3074 The contents of the header are stored in HEADER.
3075 The result is a pointer to the start of the first DIE. */
3078 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
3079 struct dwarf2_section_info
*section
,
3081 int is_debug_types_section
)
3083 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3084 bfd
*abfd
= section
->asection
->owner
;
3086 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3088 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3090 /* If we're reading a type unit, skip over the signature and
3091 type_offset fields. */
3092 if (is_debug_types_section
)
3093 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
3095 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
3097 error_check_comp_unit_head (header
, section
);
3102 /* Read in the types comp unit header information from .debug_types entry at
3103 types_ptr. The result is a pointer to one past the end of the header. */
3106 read_and_check_type_unit_head (struct comp_unit_head
*header
,
3107 struct dwarf2_section_info
*section
,
3109 ULONGEST
*signature
, cu_offset
*type_offset
)
3111 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3112 bfd
*abfd
= section
->asection
->owner
;
3114 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3116 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3118 /* If we're reading a type unit, skip over the signature and
3119 type_offset fields. */
3120 if (signature
!= NULL
)
3121 *signature
= read_8_bytes (abfd
, info_ptr
);
3123 if (type_offset
!= NULL
)
3124 type_offset
->cu_off
= read_offset_1 (abfd
, info_ptr
, header
->offset_size
);
3125 info_ptr
+= header
->offset_size
;
3127 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
3129 error_check_comp_unit_head (header
, section
);
3134 /* Allocate a new partial symtab for file named NAME and mark this new
3135 partial symtab as being an include of PST. */
3138 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
3139 struct objfile
*objfile
)
3141 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
3143 subpst
->section_offsets
= pst
->section_offsets
;
3144 subpst
->textlow
= 0;
3145 subpst
->texthigh
= 0;
3147 subpst
->dependencies
= (struct partial_symtab
**)
3148 obstack_alloc (&objfile
->objfile_obstack
,
3149 sizeof (struct partial_symtab
*));
3150 subpst
->dependencies
[0] = pst
;
3151 subpst
->number_of_dependencies
= 1;
3153 subpst
->globals_offset
= 0;
3154 subpst
->n_global_syms
= 0;
3155 subpst
->statics_offset
= 0;
3156 subpst
->n_static_syms
= 0;
3157 subpst
->symtab
= NULL
;
3158 subpst
->read_symtab
= pst
->read_symtab
;
3161 /* No private part is necessary for include psymtabs. This property
3162 can be used to differentiate between such include psymtabs and
3163 the regular ones. */
3164 subpst
->read_symtab_private
= NULL
;
3167 /* Read the Line Number Program data and extract the list of files
3168 included by the source file represented by PST. Build an include
3169 partial symtab for each of these included files. */
3172 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
3173 struct die_info
*die
,
3174 struct partial_symtab
*pst
)
3176 struct objfile
*objfile
= cu
->objfile
;
3177 bfd
*abfd
= objfile
->obfd
;
3178 struct line_header
*lh
= NULL
;
3179 struct attribute
*attr
;
3181 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3184 unsigned int line_offset
= DW_UNSND (attr
);
3186 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
3189 return; /* No linetable, so no includes. */
3191 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
3192 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, 1);
3194 free_line_header (lh
);
3198 hash_signatured_type (const void *item
)
3200 const struct signatured_type
*sig_type
= item
;
3202 /* This drops the top 32 bits of the signature, but is ok for a hash. */
3203 return sig_type
->signature
;
3207 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
3209 const struct signatured_type
*lhs
= item_lhs
;
3210 const struct signatured_type
*rhs
= item_rhs
;
3212 return lhs
->signature
== rhs
->signature
;
3215 /* Allocate a hash table for signatured types. */
3218 allocate_signatured_type_table (struct objfile
*objfile
)
3220 return htab_create_alloc_ex (41,
3221 hash_signatured_type
,
3224 &objfile
->objfile_obstack
,
3225 hashtab_obstack_allocate
,
3226 dummy_obstack_deallocate
);
3229 /* A helper function to add a signatured type CU to a table. */
3232 add_signatured_type_cu_to_table (void **slot
, void *datum
)
3234 struct signatured_type
*sigt
= *slot
;
3235 struct dwarf2_per_cu_data
***datap
= datum
;
3237 **datap
= &sigt
->per_cu
;
3243 /* Create the hash table of all entries in the .debug_types section(s).
3244 The result is zero if there are no .debug_types sections,
3245 otherwise non-zero. */
3248 create_all_type_units (struct objfile
*objfile
)
3250 htab_t types_htab
= NULL
;
3251 struct dwarf2_per_cu_data
**iter
;
3253 struct dwarf2_section_info
*section
;
3255 if (VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
))
3257 dwarf2_per_objfile
->signatured_types
= NULL
;
3262 VEC_iterate (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
3266 gdb_byte
*info_ptr
, *end_ptr
;
3268 dwarf2_read_section (objfile
, section
);
3269 info_ptr
= section
->buffer
;
3271 if (info_ptr
== NULL
)
3274 if (types_htab
== NULL
)
3275 types_htab
= allocate_signatured_type_table (objfile
);
3277 if (dwarf2_die_debug
)
3278 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
3280 end_ptr
= info_ptr
+ section
->size
;
3281 while (info_ptr
< end_ptr
)
3284 cu_offset type_offset
;
3286 struct signatured_type
*sig_type
;
3288 gdb_byte
*ptr
= info_ptr
;
3289 struct comp_unit_head header
;
3291 offset
.sect_off
= ptr
- section
->buffer
;
3293 /* We need to read the type's signature in order to build the hash
3294 table, but we don't need anything else just yet. */
3296 ptr
= read_and_check_type_unit_head (&header
, section
, ptr
,
3297 &signature
, &type_offset
);
3299 /* Skip dummy type units. */
3300 if (ptr
>= end_ptr
|| peek_abbrev_code (objfile
->obfd
, ptr
) == 0)
3302 info_ptr
= info_ptr
+ header
.initial_length_size
+ header
.length
;
3306 sig_type
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*sig_type
));
3307 memset (sig_type
, 0, sizeof (*sig_type
));
3308 sig_type
->signature
= signature
;
3309 sig_type
->type_offset
= type_offset
;
3310 sig_type
->per_cu
.objfile
= objfile
;
3311 sig_type
->per_cu
.debug_types_section
= section
;
3312 sig_type
->per_cu
.offset
= offset
;
3314 slot
= htab_find_slot (types_htab
, sig_type
, INSERT
);
3315 gdb_assert (slot
!= NULL
);
3318 const struct signatured_type
*dup_sig
= *slot
;
3320 complaint (&symfile_complaints
,
3321 _("debug type entry at offset 0x%x is duplicate to the "
3322 "entry at offset 0x%x, signature 0x%s"),
3323 offset
.sect_off
, dup_sig
->per_cu
.offset
.sect_off
,
3324 phex (signature
, sizeof (signature
)));
3325 gdb_assert (signature
== dup_sig
->signature
);
3329 if (dwarf2_die_debug
)
3330 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
3332 phex (signature
, sizeof (signature
)));
3334 info_ptr
= info_ptr
+ header
.initial_length_size
+ header
.length
;
3338 dwarf2_per_objfile
->signatured_types
= types_htab
;
3340 dwarf2_per_objfile
->n_type_units
= htab_elements (types_htab
);
3341 dwarf2_per_objfile
->all_type_units
3342 = obstack_alloc (&objfile
->objfile_obstack
,
3343 dwarf2_per_objfile
->n_type_units
3344 * sizeof (struct dwarf2_per_cu_data
*));
3345 iter
= &dwarf2_per_objfile
->all_type_units
[0];
3346 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
3347 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
3348 == dwarf2_per_objfile
->n_type_units
);
3353 /* Lookup a signature based type for DW_FORM_ref_sig8.
3354 Returns NULL if signature SIG is not present in the table. */
3356 static struct signatured_type
*
3357 lookup_signatured_type (ULONGEST sig
)
3359 struct signatured_type find_entry
, *entry
;
3361 if (dwarf2_per_objfile
->signatured_types
== NULL
)
3363 complaint (&symfile_complaints
,
3364 _("missing `.debug_types' section for DW_FORM_ref_sig8 die"));
3368 find_entry
.signature
= sig
;
3369 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
3373 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
3376 init_cu_die_reader (struct die_reader_specs
*reader
,
3377 struct dwarf2_cu
*cu
)
3379 reader
->abfd
= cu
->objfile
->obfd
;
3381 if (cu
->per_cu
->debug_types_section
)
3383 gdb_assert (cu
->per_cu
->debug_types_section
->readin
);
3384 reader
->buffer
= cu
->per_cu
->debug_types_section
->buffer
;
3388 gdb_assert (dwarf2_per_objfile
->info
.readin
);
3389 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
3393 /* Find the base address of the compilation unit for range lists and
3394 location lists. It will normally be specified by DW_AT_low_pc.
3395 In DWARF-3 draft 4, the base address could be overridden by
3396 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3397 compilation units with discontinuous ranges. */
3400 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
3402 struct attribute
*attr
;
3405 cu
->base_address
= 0;
3407 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3410 cu
->base_address
= DW_ADDR (attr
);
3415 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3418 cu
->base_address
= DW_ADDR (attr
);
3424 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
3425 to combine the common parts.
3426 Process compilation unit THIS_CU for a psymtab.
3427 SECTION is the section the CU/TU comes from,
3428 either .debug_info or .debug_types. */
3431 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
3432 struct dwarf2_section_info
*section
,
3433 int is_debug_types_section
)
3435 struct objfile
*objfile
= this_cu
->objfile
;
3436 bfd
*abfd
= objfile
->obfd
;
3437 gdb_byte
*buffer
= section
->buffer
;
3438 gdb_byte
*info_ptr
= buffer
+ this_cu
->offset
.sect_off
;
3439 unsigned int buffer_size
= section
->size
;
3440 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3441 struct die_info
*comp_unit_die
;
3442 struct partial_symtab
*pst
;
3444 struct cleanup
*back_to_inner
;
3445 struct dwarf2_cu cu
;
3446 int has_children
, has_pc_info
;
3447 struct attribute
*attr
;
3448 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
3449 struct die_reader_specs reader_specs
;
3450 const char *filename
;
3452 /* If this compilation unit was already read in, free the
3453 cached copy in order to read it in again. This is
3454 necessary because we skipped some symbols when we first
3455 read in the compilation unit (see load_partial_dies).
3456 This problem could be avoided, but the benefit is
3458 if (this_cu
->cu
!= NULL
)
3459 free_one_cached_comp_unit (this_cu
->cu
);
3461 /* Note that this is a pointer to our stack frame, being
3462 added to a global data structure. It will be cleaned up
3463 in free_stack_comp_unit when we finish with this
3464 compilation unit. */
3465 init_one_comp_unit (&cu
, this_cu
);
3466 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
3468 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
, info_ptr
,
3469 is_debug_types_section
);
3471 /* Skip dummy compilation units. */
3472 if (info_ptr
>= buffer
+ buffer_size
3473 || peek_abbrev_code (abfd
, info_ptr
) == 0)
3475 do_cleanups (back_to_inner
);
3479 cu
.list_in_scope
= &file_symbols
;
3481 /* Read the abbrevs for this compilation unit into a table. */
3482 dwarf2_read_abbrevs (&cu
);
3483 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
3485 /* Read the compilation unit die. */
3486 init_cu_die_reader (&reader_specs
, &cu
);
3487 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3490 if (is_debug_types_section
)
3492 /* LENGTH has not been set yet for type units. */
3493 gdb_assert (this_cu
->offset
.sect_off
== cu
.header
.offset
.sect_off
);
3494 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
3496 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3498 do_cleanups (back_to_inner
);
3502 prepare_one_comp_unit (&cu
, comp_unit_die
);
3504 /* Allocate a new partial symbol table structure. */
3505 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
3506 if (attr
== NULL
|| !DW_STRING (attr
))
3509 filename
= DW_STRING (attr
);
3510 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
3512 /* TEXTLOW and TEXTHIGH are set below. */
3514 objfile
->global_psymbols
.next
,
3515 objfile
->static_psymbols
.next
);
3516 pst
->psymtabs_addrmap_supported
= 1;
3518 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
3520 pst
->dirname
= DW_STRING (attr
);
3522 pst
->read_symtab_private
= this_cu
;
3524 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3526 /* Store the function that reads in the rest of the symbol table. */
3527 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
3529 this_cu
->v
.psymtab
= pst
;
3531 dwarf2_find_base_address (comp_unit_die
, &cu
);
3533 /* Possibly set the default values of LOWPC and HIGHPC from
3535 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
3536 &best_highpc
, &cu
, pst
);
3537 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
3538 /* Store the contiguous range if it is not empty; it can be empty for
3539 CUs with no code. */
3540 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3541 best_lowpc
+ baseaddr
,
3542 best_highpc
+ baseaddr
- 1, pst
);
3544 /* Check if comp unit has_children.
3545 If so, read the rest of the partial symbols from this comp unit.
3546 If not, there's no more debug_info for this comp unit. */
3549 struct partial_die_info
*first_die
;
3550 CORE_ADDR lowpc
, highpc
;
3552 lowpc
= ((CORE_ADDR
) -1);
3553 highpc
= ((CORE_ADDR
) 0);
3555 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
3557 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
3558 ! has_pc_info
, &cu
);
3560 /* If we didn't find a lowpc, set it to highpc to avoid
3561 complaints from `maint check'. */
3562 if (lowpc
== ((CORE_ADDR
) -1))
3565 /* If the compilation unit didn't have an explicit address range,
3566 then use the information extracted from its child dies. */
3570 best_highpc
= highpc
;
3573 pst
->textlow
= best_lowpc
+ baseaddr
;
3574 pst
->texthigh
= best_highpc
+ baseaddr
;
3576 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
3577 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
3578 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
3579 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
3580 sort_pst_symbols (pst
);
3582 if (is_debug_types_section
)
3584 /* It's not clear we want to do anything with stmt lists here.
3585 Waiting to see what gcc ultimately does. */
3589 /* Get the list of files included in the current compilation unit,
3590 and build a psymtab for each of them. */
3591 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
3594 do_cleanups (back_to_inner
);
3597 /* Traversal function for htab_traverse_noresize.
3598 Process one .debug_types comp-unit. */
3601 process_type_comp_unit (void **slot
, void *info
)
3603 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
3604 struct dwarf2_per_cu_data
*this_cu
;
3606 gdb_assert (info
== NULL
);
3607 this_cu
= &entry
->per_cu
;
3609 gdb_assert (this_cu
->debug_types_section
->readin
);
3610 process_psymtab_comp_unit (this_cu
, this_cu
->debug_types_section
, 1);
3615 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
3616 Build partial symbol tables for the .debug_types comp-units. */
3619 build_type_psymtabs (struct objfile
*objfile
)
3621 if (! create_all_type_units (objfile
))
3624 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
3625 process_type_comp_unit
, NULL
);
3628 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
3631 psymtabs_addrmap_cleanup (void *o
)
3633 struct objfile
*objfile
= o
;
3635 objfile
->psymtabs_addrmap
= NULL
;
3638 /* Build the partial symbol table by doing a quick pass through the
3639 .debug_info and .debug_abbrev sections. */
3642 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
3644 struct cleanup
*back_to
, *addrmap_cleanup
;
3645 struct obstack temp_obstack
;
3648 dwarf2_per_objfile
->reading_partial_symbols
= 1;
3650 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3652 /* Any cached compilation units will be linked by the per-objfile
3653 read_in_chain. Make sure to free them when we're done. */
3654 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
3656 build_type_psymtabs (objfile
);
3658 create_all_comp_units (objfile
);
3660 /* Create a temporary address map on a temporary obstack. We later
3661 copy this to the final obstack. */
3662 obstack_init (&temp_obstack
);
3663 make_cleanup_obstack_free (&temp_obstack
);
3664 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
3665 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
3667 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3669 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3671 process_psymtab_comp_unit (per_cu
, &dwarf2_per_objfile
->info
, 0);
3674 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
3675 &objfile
->objfile_obstack
);
3676 discard_cleanups (addrmap_cleanup
);
3678 do_cleanups (back_to
);
3681 /* Load the partial DIEs for a secondary CU into memory. */
3684 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
3686 struct objfile
*objfile
= this_cu
->objfile
;
3687 bfd
*abfd
= objfile
->obfd
;
3689 struct die_info
*comp_unit_die
;
3690 struct dwarf2_cu
*cu
;
3691 struct cleanup
*free_abbrevs_cleanup
, *free_cu_cleanup
= NULL
;
3693 struct die_reader_specs reader_specs
;
3695 struct dwarf2_section_info
*section
= &dwarf2_per_objfile
->info
;
3697 gdb_assert (! this_cu
->debug_types_section
);
3699 gdb_assert (section
->readin
);
3700 info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
3702 if (this_cu
->cu
== NULL
)
3704 cu
= xmalloc (sizeof (*cu
));
3705 init_one_comp_unit (cu
, this_cu
);
3709 /* If an error occurs while loading, release our storage. */
3710 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
3712 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
, info_ptr
,
3715 /* Skip dummy compilation units. */
3716 if (info_ptr
>= (section
->buffer
+ section
->size
)
3717 || peek_abbrev_code (abfd
, info_ptr
) == 0)
3719 do_cleanups (free_cu_cleanup
);
3726 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
3729 /* Read the abbrevs for this compilation unit into a table. */
3730 gdb_assert (cu
->dwarf2_abbrevs
== NULL
);
3731 dwarf2_read_abbrevs (cu
);
3732 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3734 /* Read the compilation unit die. */
3735 init_cu_die_reader (&reader_specs
, cu
);
3736 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3739 prepare_one_comp_unit (cu
, comp_unit_die
);
3741 /* Check if comp unit has_children.
3742 If so, read the rest of the partial symbols from this comp unit.
3743 If not, there's no more debug_info for this comp unit. */
3745 load_partial_dies (abfd
, section
->buffer
, info_ptr
, 0, cu
);
3747 do_cleanups (free_abbrevs_cleanup
);
3751 /* We've successfully allocated this compilation unit. Let our
3752 caller clean it up when finished with it. */
3753 discard_cleanups (free_cu_cleanup
);
3755 /* Link this CU into read_in_chain. */
3756 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3757 dwarf2_per_objfile
->read_in_chain
= this_cu
;
3761 /* Create a list of all compilation units in OBJFILE.
3762 This is only done for -readnow and building partial symtabs. */
3765 create_all_comp_units (struct objfile
*objfile
)
3769 struct dwarf2_per_cu_data
**all_comp_units
;
3772 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3773 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3777 all_comp_units
= xmalloc (n_allocated
3778 * sizeof (struct dwarf2_per_cu_data
*));
3780 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
3781 + dwarf2_per_objfile
->info
.size
)
3783 unsigned int length
, initial_length_size
;
3784 struct dwarf2_per_cu_data
*this_cu
;
3787 offset
.sect_off
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
3789 /* Read just enough information to find out where the next
3790 compilation unit is. */
3791 length
= read_initial_length (objfile
->obfd
, info_ptr
,
3792 &initial_length_size
);
3794 /* Save the compilation unit for later lookup. */
3795 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
3796 sizeof (struct dwarf2_per_cu_data
));
3797 memset (this_cu
, 0, sizeof (*this_cu
));
3798 this_cu
->offset
= offset
;
3799 this_cu
->length
= length
+ initial_length_size
;
3800 this_cu
->objfile
= objfile
;
3802 if (n_comp_units
== n_allocated
)
3805 all_comp_units
= xrealloc (all_comp_units
,
3807 * sizeof (struct dwarf2_per_cu_data
*));
3809 all_comp_units
[n_comp_units
++] = this_cu
;
3811 info_ptr
= info_ptr
+ this_cu
->length
;
3814 dwarf2_per_objfile
->all_comp_units
3815 = obstack_alloc (&objfile
->objfile_obstack
,
3816 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3817 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
3818 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3819 xfree (all_comp_units
);
3820 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
3823 /* Process all loaded DIEs for compilation unit CU, starting at
3824 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
3825 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
3826 DW_AT_ranges). If NEED_PC is set, then this function will set
3827 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
3828 and record the covered ranges in the addrmap. */
3831 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
3832 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3834 struct partial_die_info
*pdi
;
3836 /* Now, march along the PDI's, descending into ones which have
3837 interesting children but skipping the children of the other ones,
3838 until we reach the end of the compilation unit. */
3844 fixup_partial_die (pdi
, cu
);
3846 /* Anonymous namespaces or modules have no name but have interesting
3847 children, so we need to look at them. Ditto for anonymous
3850 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
3851 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
)
3855 case DW_TAG_subprogram
:
3856 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
3858 case DW_TAG_constant
:
3859 case DW_TAG_variable
:
3860 case DW_TAG_typedef
:
3861 case DW_TAG_union_type
:
3862 if (!pdi
->is_declaration
)
3864 add_partial_symbol (pdi
, cu
);
3867 case DW_TAG_class_type
:
3868 case DW_TAG_interface_type
:
3869 case DW_TAG_structure_type
:
3870 if (!pdi
->is_declaration
)
3872 add_partial_symbol (pdi
, cu
);
3875 case DW_TAG_enumeration_type
:
3876 if (!pdi
->is_declaration
)
3877 add_partial_enumeration (pdi
, cu
);
3879 case DW_TAG_base_type
:
3880 case DW_TAG_subrange_type
:
3881 /* File scope base type definitions are added to the partial
3883 add_partial_symbol (pdi
, cu
);
3885 case DW_TAG_namespace
:
3886 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
3889 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
3896 /* If the die has a sibling, skip to the sibling. */
3898 pdi
= pdi
->die_sibling
;
3902 /* Functions used to compute the fully scoped name of a partial DIE.
3904 Normally, this is simple. For C++, the parent DIE's fully scoped
3905 name is concatenated with "::" and the partial DIE's name. For
3906 Java, the same thing occurs except that "." is used instead of "::".
3907 Enumerators are an exception; they use the scope of their parent
3908 enumeration type, i.e. the name of the enumeration type is not
3909 prepended to the enumerator.
3911 There are two complexities. One is DW_AT_specification; in this
3912 case "parent" means the parent of the target of the specification,
3913 instead of the direct parent of the DIE. The other is compilers
3914 which do not emit DW_TAG_namespace; in this case we try to guess
3915 the fully qualified name of structure types from their members'
3916 linkage names. This must be done using the DIE's children rather
3917 than the children of any DW_AT_specification target. We only need
3918 to do this for structures at the top level, i.e. if the target of
3919 any DW_AT_specification (if any; otherwise the DIE itself) does not
3922 /* Compute the scope prefix associated with PDI's parent, in
3923 compilation unit CU. The result will be allocated on CU's
3924 comp_unit_obstack, or a copy of the already allocated PDI->NAME
3925 field. NULL is returned if no prefix is necessary. */
3927 partial_die_parent_scope (struct partial_die_info
*pdi
,
3928 struct dwarf2_cu
*cu
)
3930 char *grandparent_scope
;
3931 struct partial_die_info
*parent
, *real_pdi
;
3933 /* We need to look at our parent DIE; if we have a DW_AT_specification,
3934 then this means the parent of the specification DIE. */
3937 while (real_pdi
->has_specification
)
3938 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
3940 parent
= real_pdi
->die_parent
;
3944 if (parent
->scope_set
)
3945 return parent
->scope
;
3947 fixup_partial_die (parent
, cu
);
3949 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
3951 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
3952 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
3953 Work around this problem here. */
3954 if (cu
->language
== language_cplus
3955 && parent
->tag
== DW_TAG_namespace
3956 && strcmp (parent
->name
, "::") == 0
3957 && grandparent_scope
== NULL
)
3959 parent
->scope
= NULL
;
3960 parent
->scope_set
= 1;
3964 if (pdi
->tag
== DW_TAG_enumerator
)
3965 /* Enumerators should not get the name of the enumeration as a prefix. */
3966 parent
->scope
= grandparent_scope
;
3967 else if (parent
->tag
== DW_TAG_namespace
3968 || parent
->tag
== DW_TAG_module
3969 || parent
->tag
== DW_TAG_structure_type
3970 || parent
->tag
== DW_TAG_class_type
3971 || parent
->tag
== DW_TAG_interface_type
3972 || parent
->tag
== DW_TAG_union_type
3973 || parent
->tag
== DW_TAG_enumeration_type
)
3975 if (grandparent_scope
== NULL
)
3976 parent
->scope
= parent
->name
;
3978 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
3980 parent
->name
, 0, cu
);
3984 /* FIXME drow/2004-04-01: What should we be doing with
3985 function-local names? For partial symbols, we should probably be
3987 complaint (&symfile_complaints
,
3988 _("unhandled containing DIE tag %d for DIE at %d"),
3989 parent
->tag
, pdi
->offset
.sect_off
);
3990 parent
->scope
= grandparent_scope
;
3993 parent
->scope_set
= 1;
3994 return parent
->scope
;
3997 /* Return the fully scoped name associated with PDI, from compilation unit
3998 CU. The result will be allocated with malloc. */
4000 partial_die_full_name (struct partial_die_info
*pdi
,
4001 struct dwarf2_cu
*cu
)
4005 /* If this is a template instantiation, we can not work out the
4006 template arguments from partial DIEs. So, unfortunately, we have
4007 to go through the full DIEs. At least any work we do building
4008 types here will be reused if full symbols are loaded later. */
4009 if (pdi
->has_template_arguments
)
4011 fixup_partial_die (pdi
, cu
);
4013 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
4015 struct die_info
*die
;
4016 struct attribute attr
;
4017 struct dwarf2_cu
*ref_cu
= cu
;
4019 /* DW_FORM_ref_addr is using section offset. */
4021 attr
.form
= DW_FORM_ref_addr
;
4022 attr
.u
.addr
= pdi
->offset
.sect_off
;
4023 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
4025 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
4029 parent_scope
= partial_die_parent_scope (pdi
, cu
);
4030 if (parent_scope
== NULL
)
4033 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
4037 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
4039 struct objfile
*objfile
= cu
->objfile
;
4041 char *actual_name
= NULL
;
4043 int built_actual_name
= 0;
4045 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4047 actual_name
= partial_die_full_name (pdi
, cu
);
4049 built_actual_name
= 1;
4051 if (actual_name
== NULL
)
4052 actual_name
= pdi
->name
;
4056 case DW_TAG_subprogram
:
4057 if (pdi
->is_external
|| cu
->language
== language_ada
)
4059 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
4060 of the global scope. But in Ada, we want to be able to access
4061 nested procedures globally. So all Ada subprograms are stored
4062 in the global scope. */
4063 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
4064 mst_text, objfile); */
4065 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4067 VAR_DOMAIN
, LOC_BLOCK
,
4068 &objfile
->global_psymbols
,
4069 0, pdi
->lowpc
+ baseaddr
,
4070 cu
->language
, objfile
);
4074 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
4075 mst_file_text, objfile); */
4076 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4078 VAR_DOMAIN
, LOC_BLOCK
,
4079 &objfile
->static_psymbols
,
4080 0, pdi
->lowpc
+ baseaddr
,
4081 cu
->language
, objfile
);
4084 case DW_TAG_constant
:
4086 struct psymbol_allocation_list
*list
;
4088 if (pdi
->is_external
)
4089 list
= &objfile
->global_psymbols
;
4091 list
= &objfile
->static_psymbols
;
4092 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4093 built_actual_name
, VAR_DOMAIN
, LOC_STATIC
,
4094 list
, 0, 0, cu
->language
, objfile
);
4097 case DW_TAG_variable
:
4099 addr
= decode_locdesc (pdi
->locdesc
, cu
);
4103 && !dwarf2_per_objfile
->has_section_at_zero
)
4105 /* A global or static variable may also have been stripped
4106 out by the linker if unused, in which case its address
4107 will be nullified; do not add such variables into partial
4108 symbol table then. */
4110 else if (pdi
->is_external
)
4113 Don't enter into the minimal symbol tables as there is
4114 a minimal symbol table entry from the ELF symbols already.
4115 Enter into partial symbol table if it has a location
4116 descriptor or a type.
4117 If the location descriptor is missing, new_symbol will create
4118 a LOC_UNRESOLVED symbol, the address of the variable will then
4119 be determined from the minimal symbol table whenever the variable
4121 The address for the partial symbol table entry is not
4122 used by GDB, but it comes in handy for debugging partial symbol
4125 if (pdi
->locdesc
|| pdi
->has_type
)
4126 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4128 VAR_DOMAIN
, LOC_STATIC
,
4129 &objfile
->global_psymbols
,
4131 cu
->language
, objfile
);
4135 /* Static Variable. Skip symbols without location descriptors. */
4136 if (pdi
->locdesc
== NULL
)
4138 if (built_actual_name
)
4139 xfree (actual_name
);
4142 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
4143 mst_file_data, objfile); */
4144 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4146 VAR_DOMAIN
, LOC_STATIC
,
4147 &objfile
->static_psymbols
,
4149 cu
->language
, objfile
);
4152 case DW_TAG_typedef
:
4153 case DW_TAG_base_type
:
4154 case DW_TAG_subrange_type
:
4155 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4157 VAR_DOMAIN
, LOC_TYPEDEF
,
4158 &objfile
->static_psymbols
,
4159 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
4161 case DW_TAG_namespace
:
4162 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4164 VAR_DOMAIN
, LOC_TYPEDEF
,
4165 &objfile
->global_psymbols
,
4166 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
4168 case DW_TAG_class_type
:
4169 case DW_TAG_interface_type
:
4170 case DW_TAG_structure_type
:
4171 case DW_TAG_union_type
:
4172 case DW_TAG_enumeration_type
:
4173 /* Skip external references. The DWARF standard says in the section
4174 about "Structure, Union, and Class Type Entries": "An incomplete
4175 structure, union or class type is represented by a structure,
4176 union or class entry that does not have a byte size attribute
4177 and that has a DW_AT_declaration attribute." */
4178 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
4180 if (built_actual_name
)
4181 xfree (actual_name
);
4185 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
4186 static vs. global. */
4187 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4189 STRUCT_DOMAIN
, LOC_TYPEDEF
,
4190 (cu
->language
== language_cplus
4191 || cu
->language
== language_java
)
4192 ? &objfile
->global_psymbols
4193 : &objfile
->static_psymbols
,
4194 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
4197 case DW_TAG_enumerator
:
4198 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4200 VAR_DOMAIN
, LOC_CONST
,
4201 (cu
->language
== language_cplus
4202 || cu
->language
== language_java
)
4203 ? &objfile
->global_psymbols
4204 : &objfile
->static_psymbols
,
4205 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
4211 if (built_actual_name
)
4212 xfree (actual_name
);
4215 /* Read a partial die corresponding to a namespace; also, add a symbol
4216 corresponding to that namespace to the symbol table. NAMESPACE is
4217 the name of the enclosing namespace. */
4220 add_partial_namespace (struct partial_die_info
*pdi
,
4221 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4222 int need_pc
, struct dwarf2_cu
*cu
)
4224 /* Add a symbol for the namespace. */
4226 add_partial_symbol (pdi
, cu
);
4228 /* Now scan partial symbols in that namespace. */
4230 if (pdi
->has_children
)
4231 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
4234 /* Read a partial die corresponding to a Fortran module. */
4237 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
4238 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
4240 /* Now scan partial symbols in that module. */
4242 if (pdi
->has_children
)
4243 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
4246 /* Read a partial die corresponding to a subprogram and create a partial
4247 symbol for that subprogram. When the CU language allows it, this
4248 routine also defines a partial symbol for each nested subprogram
4249 that this subprogram contains.
4251 DIE my also be a lexical block, in which case we simply search
4252 recursively for suprograms defined inside that lexical block.
4253 Again, this is only performed when the CU language allows this
4254 type of definitions. */
4257 add_partial_subprogram (struct partial_die_info
*pdi
,
4258 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4259 int need_pc
, struct dwarf2_cu
*cu
)
4261 if (pdi
->tag
== DW_TAG_subprogram
)
4263 if (pdi
->has_pc_info
)
4265 if (pdi
->lowpc
< *lowpc
)
4266 *lowpc
= pdi
->lowpc
;
4267 if (pdi
->highpc
> *highpc
)
4268 *highpc
= pdi
->highpc
;
4272 struct objfile
*objfile
= cu
->objfile
;
4274 baseaddr
= ANOFFSET (objfile
->section_offsets
,
4275 SECT_OFF_TEXT (objfile
));
4276 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4277 pdi
->lowpc
+ baseaddr
,
4278 pdi
->highpc
- 1 + baseaddr
,
4279 cu
->per_cu
->v
.psymtab
);
4283 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
4285 if (!pdi
->is_declaration
)
4286 /* Ignore subprogram DIEs that do not have a name, they are
4287 illegal. Do not emit a complaint at this point, we will
4288 do so when we convert this psymtab into a symtab. */
4290 add_partial_symbol (pdi
, cu
);
4294 if (! pdi
->has_children
)
4297 if (cu
->language
== language_ada
)
4299 pdi
= pdi
->die_child
;
4302 fixup_partial_die (pdi
, cu
);
4303 if (pdi
->tag
== DW_TAG_subprogram
4304 || pdi
->tag
== DW_TAG_lexical_block
)
4305 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
4306 pdi
= pdi
->die_sibling
;
4311 /* Read a partial die corresponding to an enumeration type. */
4314 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
4315 struct dwarf2_cu
*cu
)
4317 struct partial_die_info
*pdi
;
4319 if (enum_pdi
->name
!= NULL
)
4320 add_partial_symbol (enum_pdi
, cu
);
4322 pdi
= enum_pdi
->die_child
;
4325 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
4326 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
4328 add_partial_symbol (pdi
, cu
);
4329 pdi
= pdi
->die_sibling
;
4333 /* Return the initial uleb128 in the die at INFO_PTR. */
4336 peek_abbrev_code (bfd
*abfd
, gdb_byte
*info_ptr
)
4338 unsigned int bytes_read
;
4340 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4343 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
4344 Return the corresponding abbrev, or NULL if the number is zero (indicating
4345 an empty DIE). In either case *BYTES_READ will be set to the length of
4346 the initial number. */
4348 static struct abbrev_info
*
4349 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
4350 struct dwarf2_cu
*cu
)
4352 bfd
*abfd
= cu
->objfile
->obfd
;
4353 unsigned int abbrev_number
;
4354 struct abbrev_info
*abbrev
;
4356 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
4358 if (abbrev_number
== 0)
4361 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
4364 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
4365 abbrev_number
, bfd_get_filename (abfd
));
4371 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4372 Returns a pointer to the end of a series of DIEs, terminated by an empty
4373 DIE. Any children of the skipped DIEs will also be skipped. */
4376 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
4378 struct abbrev_info
*abbrev
;
4379 unsigned int bytes_read
;
4383 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
4385 return info_ptr
+ bytes_read
;
4387 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
4391 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4392 INFO_PTR should point just after the initial uleb128 of a DIE, and the
4393 abbrev corresponding to that skipped uleb128 should be passed in
4394 ABBREV. Returns a pointer to this DIE's sibling, skipping any
4398 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4399 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
4401 unsigned int bytes_read
;
4402 struct attribute attr
;
4403 bfd
*abfd
= cu
->objfile
->obfd
;
4404 unsigned int form
, i
;
4406 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
4408 /* The only abbrev we care about is DW_AT_sibling. */
4409 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
4411 read_attribute (&attr
, &abbrev
->attrs
[i
],
4412 abfd
, info_ptr
, cu
);
4413 if (attr
.form
== DW_FORM_ref_addr
)
4414 complaint (&symfile_complaints
,
4415 _("ignoring absolute DW_AT_sibling"));
4417 return buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
4420 /* If it isn't DW_AT_sibling, skip this attribute. */
4421 form
= abbrev
->attrs
[i
].form
;
4425 case DW_FORM_ref_addr
:
4426 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
4427 and later it is offset sized. */
4428 if (cu
->header
.version
== 2)
4429 info_ptr
+= cu
->header
.addr_size
;
4431 info_ptr
+= cu
->header
.offset_size
;
4434 info_ptr
+= cu
->header
.addr_size
;
4441 case DW_FORM_flag_present
:
4453 case DW_FORM_ref_sig8
:
4456 case DW_FORM_string
:
4457 read_direct_string (abfd
, info_ptr
, &bytes_read
);
4458 info_ptr
+= bytes_read
;
4460 case DW_FORM_sec_offset
:
4462 info_ptr
+= cu
->header
.offset_size
;
4464 case DW_FORM_exprloc
:
4466 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4467 info_ptr
+= bytes_read
;
4469 case DW_FORM_block1
:
4470 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
4472 case DW_FORM_block2
:
4473 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
4475 case DW_FORM_block4
:
4476 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
4480 case DW_FORM_ref_udata
:
4481 info_ptr
= skip_leb128 (abfd
, info_ptr
);
4483 case DW_FORM_indirect
:
4484 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4485 info_ptr
+= bytes_read
;
4486 /* We need to continue parsing from here, so just go back to
4488 goto skip_attribute
;
4491 error (_("Dwarf Error: Cannot handle %s "
4492 "in DWARF reader [in module %s]"),
4493 dwarf_form_name (form
),
4494 bfd_get_filename (abfd
));
4498 if (abbrev
->has_children
)
4499 return skip_children (buffer
, info_ptr
, cu
);
4504 /* Locate ORIG_PDI's sibling.
4505 INFO_PTR should point to the start of the next DIE after ORIG_PDI
4509 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
4510 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4511 bfd
*abfd
, struct dwarf2_cu
*cu
)
4513 /* Do we know the sibling already? */
4515 if (orig_pdi
->sibling
)
4516 return orig_pdi
->sibling
;
4518 /* Are there any children to deal with? */
4520 if (!orig_pdi
->has_children
)
4523 /* Skip the children the long way. */
4525 return skip_children (buffer
, info_ptr
, cu
);
4528 /* Expand this partial symbol table into a full symbol table. */
4531 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
4537 warning (_("bug: psymtab for %s is already read in."),
4544 printf_filtered (_("Reading in symbols for %s..."),
4546 gdb_flush (gdb_stdout
);
4549 /* Restore our global data. */
4550 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
4551 dwarf2_objfile_data_key
);
4553 /* If this psymtab is constructed from a debug-only objfile, the
4554 has_section_at_zero flag will not necessarily be correct. We
4555 can get the correct value for this flag by looking at the data
4556 associated with the (presumably stripped) associated objfile. */
4557 if (pst
->objfile
->separate_debug_objfile_backlink
)
4559 struct dwarf2_per_objfile
*dpo_backlink
4560 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
4561 dwarf2_objfile_data_key
);
4563 dwarf2_per_objfile
->has_section_at_zero
4564 = dpo_backlink
->has_section_at_zero
;
4567 dwarf2_per_objfile
->reading_partial_symbols
= 0;
4569 psymtab_to_symtab_1 (pst
);
4571 /* Finish up the debug error message. */
4573 printf_filtered (_("done.\n"));
4578 /* Reading in full CUs. */
4580 /* Add PER_CU to the queue. */
4583 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
4585 struct dwarf2_queue_item
*item
;
4588 item
= xmalloc (sizeof (*item
));
4589 item
->per_cu
= per_cu
;
4592 if (dwarf2_queue
== NULL
)
4593 dwarf2_queue
= item
;
4595 dwarf2_queue_tail
->next
= item
;
4597 dwarf2_queue_tail
= item
;
4600 /* Process the queue. */
4603 process_queue (void)
4605 struct dwarf2_queue_item
*item
, *next_item
;
4607 /* The queue starts out with one item, but following a DIE reference
4608 may load a new CU, adding it to the end of the queue. */
4609 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
4611 if (dwarf2_per_objfile
->using_index
4612 ? !item
->per_cu
->v
.quick
->symtab
4613 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
4614 process_full_comp_unit (item
->per_cu
);
4616 item
->per_cu
->queued
= 0;
4617 next_item
= item
->next
;
4621 dwarf2_queue_tail
= NULL
;
4624 /* Free all allocated queue entries. This function only releases anything if
4625 an error was thrown; if the queue was processed then it would have been
4626 freed as we went along. */
4629 dwarf2_release_queue (void *dummy
)
4631 struct dwarf2_queue_item
*item
, *last
;
4633 item
= dwarf2_queue
;
4636 /* Anything still marked queued is likely to be in an
4637 inconsistent state, so discard it. */
4638 if (item
->per_cu
->queued
)
4640 if (item
->per_cu
->cu
!= NULL
)
4641 free_one_cached_comp_unit (item
->per_cu
->cu
);
4642 item
->per_cu
->queued
= 0;
4650 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
4653 /* Read in full symbols for PST, and anything it depends on. */
4656 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
4658 struct dwarf2_per_cu_data
*per_cu
;
4659 struct cleanup
*back_to
;
4662 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
4663 if (!pst
->dependencies
[i
]->readin
)
4665 /* Inform about additional files that need to be read in. */
4668 /* FIXME: i18n: Need to make this a single string. */
4669 fputs_filtered (" ", gdb_stdout
);
4671 fputs_filtered ("and ", gdb_stdout
);
4673 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
4674 wrap_here (""); /* Flush output. */
4675 gdb_flush (gdb_stdout
);
4677 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
4680 per_cu
= pst
->read_symtab_private
;
4684 /* It's an include file, no symbols to read for it.
4685 Everything is in the parent symtab. */
4690 dw2_do_instantiate_symtab (per_cu
);
4693 /* Load the DIEs associated with PER_CU into memory. */
4696 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
4698 struct objfile
*objfile
= per_cu
->objfile
;
4699 bfd
*abfd
= objfile
->obfd
;
4700 struct dwarf2_cu
*cu
;
4702 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
4703 struct cleanup
*free_cu_cleanup
= NULL
;
4704 struct attribute
*attr
;
4707 gdb_assert (! per_cu
->debug_types_section
);
4709 /* Set local variables from the partial symbol table info. */
4710 offset
= per_cu
->offset
;
4712 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
4713 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
.sect_off
;
4714 beg_of_comp_unit
= info_ptr
;
4716 if (per_cu
->cu
== NULL
)
4718 cu
= xmalloc (sizeof (*cu
));
4719 init_one_comp_unit (cu
, per_cu
);
4723 /* If an error occurs while loading, release our storage. */
4724 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
4726 /* Read in the comp_unit header. */
4727 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
4729 /* Skip dummy compilation units. */
4730 if (info_ptr
>= (dwarf2_per_objfile
->info
.buffer
4731 + dwarf2_per_objfile
->info
.size
)
4732 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4734 do_cleanups (free_cu_cleanup
);
4738 /* Complete the cu_header. */
4739 cu
->header
.offset
= offset
;
4740 cu
->header
.first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4745 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
4748 cu
->dies
= read_comp_unit (info_ptr
, cu
);
4750 /* We try not to read any attributes in this function, because not
4751 all CUs needed for references have been loaded yet, and symbol
4752 table processing isn't initialized. But we have to set the CU language,
4753 or we won't be able to build types correctly. */
4754 prepare_one_comp_unit (cu
, cu
->dies
);
4756 /* Similarly, if we do not read the producer, we can not apply
4757 producer-specific interpretation. */
4758 attr
= dwarf2_attr (cu
->dies
, DW_AT_producer
, cu
);
4760 cu
->producer
= DW_STRING (attr
);
4764 /* We've successfully allocated this compilation unit. Let our
4765 caller clean it up when finished with it. */
4766 discard_cleanups (free_cu_cleanup
);
4768 /* Link this CU into read_in_chain. */
4769 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4770 dwarf2_per_objfile
->read_in_chain
= per_cu
;
4774 /* Add a DIE to the delayed physname list. */
4777 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
4778 const char *name
, struct die_info
*die
,
4779 struct dwarf2_cu
*cu
)
4781 struct delayed_method_info mi
;
4783 mi
.fnfield_index
= fnfield_index
;
4787 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
4790 /* A cleanup for freeing the delayed method list. */
4793 free_delayed_list (void *ptr
)
4795 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
4796 if (cu
->method_list
!= NULL
)
4798 VEC_free (delayed_method_info
, cu
->method_list
);
4799 cu
->method_list
= NULL
;
4803 /* Compute the physnames of any methods on the CU's method list.
4805 The computation of method physnames is delayed in order to avoid the
4806 (bad) condition that one of the method's formal parameters is of an as yet
4810 compute_delayed_physnames (struct dwarf2_cu
*cu
)
4813 struct delayed_method_info
*mi
;
4814 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
4816 const char *physname
;
4817 struct fn_fieldlist
*fn_flp
4818 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
4819 physname
= dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
4820 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
4824 /* Generate full symbol information for PER_CU, whose DIEs have
4825 already been loaded into memory. */
4828 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
4830 struct dwarf2_cu
*cu
= per_cu
->cu
;
4831 struct objfile
*objfile
= per_cu
->objfile
;
4832 CORE_ADDR lowpc
, highpc
;
4833 struct symtab
*symtab
;
4834 struct cleanup
*back_to
, *delayed_list_cleanup
;
4837 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4840 back_to
= make_cleanup (really_free_pendings
, NULL
);
4841 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
4843 cu
->list_in_scope
= &file_symbols
;
4845 /* Do line number decoding in read_file_scope () */
4846 process_die (cu
->dies
, cu
);
4848 /* Now that we have processed all the DIEs in the CU, all the types
4849 should be complete, and it should now be safe to compute all of the
4851 compute_delayed_physnames (cu
);
4852 do_cleanups (delayed_list_cleanup
);
4854 /* Some compilers don't define a DW_AT_high_pc attribute for the
4855 compilation unit. If the DW_AT_high_pc is missing, synthesize
4856 it, by scanning the DIE's below the compilation unit. */
4857 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
4859 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
4863 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
4865 /* Set symtab language to language from DW_AT_language. If the
4866 compilation is from a C file generated by language preprocessors, do
4867 not set the language if it was already deduced by start_subfile. */
4868 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
4869 symtab
->language
= cu
->language
;
4871 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
4872 produce DW_AT_location with location lists but it can be possibly
4873 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
4874 there were bugs in prologue debug info, fixed later in GCC-4.5
4875 by "unwind info for epilogues" patch (which is not directly related).
4877 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
4878 needed, it would be wrong due to missing DW_AT_producer there.
4880 Still one can confuse GDB by using non-standard GCC compilation
4881 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
4883 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
4884 symtab
->locations_valid
= 1;
4886 if (gcc_4_minor
>= 5)
4887 symtab
->epilogue_unwind_valid
= 1;
4889 symtab
->call_site_htab
= cu
->call_site_htab
;
4892 if (dwarf2_per_objfile
->using_index
)
4893 per_cu
->v
.quick
->symtab
= symtab
;
4896 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
4897 pst
->symtab
= symtab
;
4901 do_cleanups (back_to
);
4904 /* Process a die and its children. */
4907 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
4911 case DW_TAG_padding
:
4913 case DW_TAG_compile_unit
:
4914 read_file_scope (die
, cu
);
4916 case DW_TAG_type_unit
:
4917 read_type_unit_scope (die
, cu
);
4919 case DW_TAG_subprogram
:
4920 case DW_TAG_inlined_subroutine
:
4921 read_func_scope (die
, cu
);
4923 case DW_TAG_lexical_block
:
4924 case DW_TAG_try_block
:
4925 case DW_TAG_catch_block
:
4926 read_lexical_block_scope (die
, cu
);
4928 case DW_TAG_GNU_call_site
:
4929 read_call_site_scope (die
, cu
);
4931 case DW_TAG_class_type
:
4932 case DW_TAG_interface_type
:
4933 case DW_TAG_structure_type
:
4934 case DW_TAG_union_type
:
4935 process_structure_scope (die
, cu
);
4937 case DW_TAG_enumeration_type
:
4938 process_enumeration_scope (die
, cu
);
4941 /* These dies have a type, but processing them does not create
4942 a symbol or recurse to process the children. Therefore we can
4943 read them on-demand through read_type_die. */
4944 case DW_TAG_subroutine_type
:
4945 case DW_TAG_set_type
:
4946 case DW_TAG_array_type
:
4947 case DW_TAG_pointer_type
:
4948 case DW_TAG_ptr_to_member_type
:
4949 case DW_TAG_reference_type
:
4950 case DW_TAG_string_type
:
4953 case DW_TAG_base_type
:
4954 case DW_TAG_subrange_type
:
4955 case DW_TAG_typedef
:
4956 /* Add a typedef symbol for the type definition, if it has a
4958 new_symbol (die
, read_type_die (die
, cu
), cu
);
4960 case DW_TAG_common_block
:
4961 read_common_block (die
, cu
);
4963 case DW_TAG_common_inclusion
:
4965 case DW_TAG_namespace
:
4966 processing_has_namespace_info
= 1;
4967 read_namespace (die
, cu
);
4970 processing_has_namespace_info
= 1;
4971 read_module (die
, cu
);
4973 case DW_TAG_imported_declaration
:
4974 case DW_TAG_imported_module
:
4975 processing_has_namespace_info
= 1;
4976 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
4977 || cu
->language
!= language_fortran
))
4978 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
4979 dwarf_tag_name (die
->tag
));
4980 read_import_statement (die
, cu
);
4983 new_symbol (die
, NULL
, cu
);
4988 /* A helper function for dwarf2_compute_name which determines whether DIE
4989 needs to have the name of the scope prepended to the name listed in the
4993 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4995 struct attribute
*attr
;
4999 case DW_TAG_namespace
:
5000 case DW_TAG_typedef
:
5001 case DW_TAG_class_type
:
5002 case DW_TAG_interface_type
:
5003 case DW_TAG_structure_type
:
5004 case DW_TAG_union_type
:
5005 case DW_TAG_enumeration_type
:
5006 case DW_TAG_enumerator
:
5007 case DW_TAG_subprogram
:
5011 case DW_TAG_variable
:
5012 case DW_TAG_constant
:
5013 /* We only need to prefix "globally" visible variables. These include
5014 any variable marked with DW_AT_external or any variable that
5015 lives in a namespace. [Variables in anonymous namespaces
5016 require prefixing, but they are not DW_AT_external.] */
5018 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
5020 struct dwarf2_cu
*spec_cu
= cu
;
5022 return die_needs_namespace (die_specification (die
, &spec_cu
),
5026 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
5027 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
5028 && die
->parent
->tag
!= DW_TAG_module
)
5030 /* A variable in a lexical block of some kind does not need a
5031 namespace, even though in C++ such variables may be external
5032 and have a mangled name. */
5033 if (die
->parent
->tag
== DW_TAG_lexical_block
5034 || die
->parent
->tag
== DW_TAG_try_block
5035 || die
->parent
->tag
== DW_TAG_catch_block
5036 || die
->parent
->tag
== DW_TAG_subprogram
)
5045 /* Retrieve the last character from a mem_file. */
5048 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
5050 char *last_char_p
= (char *) object
;
5053 *last_char_p
= buffer
[length
- 1];
5056 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
5057 compute the physname for the object, which include a method's
5058 formal parameters (C++/Java) and return type (Java).
5060 For Ada, return the DIE's linkage name rather than the fully qualified
5061 name. PHYSNAME is ignored..
5063 The result is allocated on the objfile_obstack and canonicalized. */
5066 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
5069 struct objfile
*objfile
= cu
->objfile
;
5072 name
= dwarf2_name (die
, cu
);
5074 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
5075 compute it by typename_concat inside GDB. */
5076 if (cu
->language
== language_ada
5077 || (cu
->language
== language_fortran
&& physname
))
5079 /* For Ada unit, we prefer the linkage name over the name, as
5080 the former contains the exported name, which the user expects
5081 to be able to reference. Ideally, we want the user to be able
5082 to reference this entity using either natural or linkage name,
5083 but we haven't started looking at this enhancement yet. */
5084 struct attribute
*attr
;
5086 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
5088 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
5089 if (attr
&& DW_STRING (attr
))
5090 return DW_STRING (attr
);
5093 /* These are the only languages we know how to qualify names in. */
5095 && (cu
->language
== language_cplus
|| cu
->language
== language_java
5096 || cu
->language
== language_fortran
))
5098 if (die_needs_namespace (die
, cu
))
5102 struct ui_file
*buf
;
5104 prefix
= determine_prefix (die
, cu
);
5105 buf
= mem_fileopen ();
5106 if (*prefix
!= '\0')
5108 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
5111 fputs_unfiltered (prefixed_name
, buf
);
5112 xfree (prefixed_name
);
5115 fputs_unfiltered (name
, buf
);
5117 /* Template parameters may be specified in the DIE's DW_AT_name, or
5118 as children with DW_TAG_template_type_param or
5119 DW_TAG_value_type_param. If the latter, add them to the name
5120 here. If the name already has template parameters, then
5121 skip this step; some versions of GCC emit both, and
5122 it is more efficient to use the pre-computed name.
5124 Something to keep in mind about this process: it is very
5125 unlikely, or in some cases downright impossible, to produce
5126 something that will match the mangled name of a function.
5127 If the definition of the function has the same debug info,
5128 we should be able to match up with it anyway. But fallbacks
5129 using the minimal symbol, for instance to find a method
5130 implemented in a stripped copy of libstdc++, will not work.
5131 If we do not have debug info for the definition, we will have to
5132 match them up some other way.
5134 When we do name matching there is a related problem with function
5135 templates; two instantiated function templates are allowed to
5136 differ only by their return types, which we do not add here. */
5138 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
5140 struct attribute
*attr
;
5141 struct die_info
*child
;
5144 die
->building_fullname
= 1;
5146 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
5151 struct dwarf2_locexpr_baton
*baton
;
5154 if (child
->tag
!= DW_TAG_template_type_param
5155 && child
->tag
!= DW_TAG_template_value_param
)
5160 fputs_unfiltered ("<", buf
);
5164 fputs_unfiltered (", ", buf
);
5166 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
5169 complaint (&symfile_complaints
,
5170 _("template parameter missing DW_AT_type"));
5171 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
5174 type
= die_type (child
, cu
);
5176 if (child
->tag
== DW_TAG_template_type_param
)
5178 c_print_type (type
, "", buf
, -1, 0);
5182 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
5185 complaint (&symfile_complaints
,
5186 _("template parameter missing "
5187 "DW_AT_const_value"));
5188 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
5192 dwarf2_const_value_attr (attr
, type
, name
,
5193 &cu
->comp_unit_obstack
, cu
,
5194 &value
, &bytes
, &baton
);
5196 if (TYPE_NOSIGN (type
))
5197 /* GDB prints characters as NUMBER 'CHAR'. If that's
5198 changed, this can use value_print instead. */
5199 c_printchar (value
, type
, buf
);
5202 struct value_print_options opts
;
5205 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
5209 else if (bytes
!= NULL
)
5211 v
= allocate_value (type
);
5212 memcpy (value_contents_writeable (v
), bytes
,
5213 TYPE_LENGTH (type
));
5216 v
= value_from_longest (type
, value
);
5218 /* Specify decimal so that we do not depend on
5220 get_formatted_print_options (&opts
, 'd');
5222 value_print (v
, buf
, &opts
);
5228 die
->building_fullname
= 0;
5232 /* Close the argument list, with a space if necessary
5233 (nested templates). */
5234 char last_char
= '\0';
5235 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
5236 if (last_char
== '>')
5237 fputs_unfiltered (" >", buf
);
5239 fputs_unfiltered (">", buf
);
5243 /* For Java and C++ methods, append formal parameter type
5244 information, if PHYSNAME. */
5246 if (physname
&& die
->tag
== DW_TAG_subprogram
5247 && (cu
->language
== language_cplus
5248 || cu
->language
== language_java
))
5250 struct type
*type
= read_type_die (die
, cu
);
5252 c_type_print_args (type
, buf
, 1, cu
->language
);
5254 if (cu
->language
== language_java
)
5256 /* For java, we must append the return type to method
5258 if (die
->tag
== DW_TAG_subprogram
)
5259 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
5262 else if (cu
->language
== language_cplus
)
5264 /* Assume that an artificial first parameter is
5265 "this", but do not crash if it is not. RealView
5266 marks unnamed (and thus unused) parameters as
5267 artificial; there is no way to differentiate
5269 if (TYPE_NFIELDS (type
) > 0
5270 && TYPE_FIELD_ARTIFICIAL (type
, 0)
5271 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
5272 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
5274 fputs_unfiltered (" const", buf
);
5278 name
= ui_file_obsavestring (buf
, &objfile
->objfile_obstack
,
5280 ui_file_delete (buf
);
5282 if (cu
->language
== language_cplus
)
5285 = dwarf2_canonicalize_name (name
, cu
,
5286 &objfile
->objfile_obstack
);
5297 /* Return the fully qualified name of DIE, based on its DW_AT_name.
5298 If scope qualifiers are appropriate they will be added. The result
5299 will be allocated on the objfile_obstack, or NULL if the DIE does
5300 not have a name. NAME may either be from a previous call to
5301 dwarf2_name or NULL.
5303 The output string will be canonicalized (if C++/Java). */
5306 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
5308 return dwarf2_compute_name (name
, die
, cu
, 0);
5311 /* Construct a physname for the given DIE in CU. NAME may either be
5312 from a previous call to dwarf2_name or NULL. The result will be
5313 allocated on the objfile_objstack or NULL if the DIE does not have a
5316 The output string will be canonicalized (if C++/Java). */
5319 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
5321 struct objfile
*objfile
= cu
->objfile
;
5322 struct attribute
*attr
;
5323 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
5324 struct cleanup
*back_to
;
5327 /* In this case dwarf2_compute_name is just a shortcut not building anything
5329 if (!die_needs_namespace (die
, cu
))
5330 return dwarf2_compute_name (name
, die
, cu
, 1);
5332 back_to
= make_cleanup (null_cleanup
, NULL
);
5334 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
5336 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
5338 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
5340 if (attr
&& DW_STRING (attr
))
5344 mangled
= DW_STRING (attr
);
5346 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
5347 type. It is easier for GDB users to search for such functions as
5348 `name(params)' than `long name(params)'. In such case the minimal
5349 symbol names do not match the full symbol names but for template
5350 functions there is never a need to look up their definition from their
5351 declaration so the only disadvantage remains the minimal symbol
5352 variant `long name(params)' does not have the proper inferior type.
5355 demangled
= cplus_demangle (mangled
, (DMGL_PARAMS
| DMGL_ANSI
5356 | (cu
->language
== language_java
5357 ? DMGL_JAVA
| DMGL_RET_POSTFIX
5361 make_cleanup (xfree
, demangled
);
5371 if (canon
== NULL
|| check_physname
)
5373 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
5375 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
5377 /* It may not mean a bug in GDB. The compiler could also
5378 compute DW_AT_linkage_name incorrectly. But in such case
5379 GDB would need to be bug-to-bug compatible. */
5381 complaint (&symfile_complaints
,
5382 _("Computed physname <%s> does not match demangled <%s> "
5383 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
5384 physname
, canon
, mangled
, die
->offset
.sect_off
, objfile
->name
);
5386 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
5387 is available here - over computed PHYSNAME. It is safer
5388 against both buggy GDB and buggy compilers. */
5402 retval
= obsavestring (retval
, strlen (retval
),
5403 &objfile
->objfile_obstack
);
5405 do_cleanups (back_to
);
5409 /* Read the import statement specified by the given die and record it. */
5412 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
5414 struct objfile
*objfile
= cu
->objfile
;
5415 struct attribute
*import_attr
;
5416 struct die_info
*imported_die
, *child_die
;
5417 struct dwarf2_cu
*imported_cu
;
5418 const char *imported_name
;
5419 const char *imported_name_prefix
;
5420 const char *canonical_name
;
5421 const char *import_alias
;
5422 const char *imported_declaration
= NULL
;
5423 const char *import_prefix
;
5424 VEC (const_char_ptr
) *excludes
= NULL
;
5425 struct cleanup
*cleanups
;
5429 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
5430 if (import_attr
== NULL
)
5432 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
5433 dwarf_tag_name (die
->tag
));
5438 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
5439 imported_name
= dwarf2_name (imported_die
, imported_cu
);
5440 if (imported_name
== NULL
)
5442 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
5444 The import in the following code:
5458 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
5459 <52> DW_AT_decl_file : 1
5460 <53> DW_AT_decl_line : 6
5461 <54> DW_AT_import : <0x75>
5462 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
5464 <5b> DW_AT_decl_file : 1
5465 <5c> DW_AT_decl_line : 2
5466 <5d> DW_AT_type : <0x6e>
5468 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
5469 <76> DW_AT_byte_size : 4
5470 <77> DW_AT_encoding : 5 (signed)
5472 imports the wrong die ( 0x75 instead of 0x58 ).
5473 This case will be ignored until the gcc bug is fixed. */
5477 /* Figure out the local name after import. */
5478 import_alias
= dwarf2_name (die
, cu
);
5480 /* Figure out where the statement is being imported to. */
5481 import_prefix
= determine_prefix (die
, cu
);
5483 /* Figure out what the scope of the imported die is and prepend it
5484 to the name of the imported die. */
5485 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
5487 if (imported_die
->tag
!= DW_TAG_namespace
5488 && imported_die
->tag
!= DW_TAG_module
)
5490 imported_declaration
= imported_name
;
5491 canonical_name
= imported_name_prefix
;
5493 else if (strlen (imported_name_prefix
) > 0)
5495 temp
= alloca (strlen (imported_name_prefix
)
5496 + 2 + strlen (imported_name
) + 1);
5497 strcpy (temp
, imported_name_prefix
);
5498 strcat (temp
, "::");
5499 strcat (temp
, imported_name
);
5500 canonical_name
= temp
;
5503 canonical_name
= imported_name
;
5505 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
5507 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
5508 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
5509 child_die
= sibling_die (child_die
))
5511 /* DWARF-4: A Fortran use statement with a “rename list” may be
5512 represented by an imported module entry with an import attribute
5513 referring to the module and owned entries corresponding to those
5514 entities that are renamed as part of being imported. */
5516 if (child_die
->tag
!= DW_TAG_imported_declaration
)
5518 complaint (&symfile_complaints
,
5519 _("child DW_TAG_imported_declaration expected "
5520 "- DIE at 0x%x [in module %s]"),
5521 child_die
->offset
.sect_off
, objfile
->name
);
5525 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
5526 if (import_attr
== NULL
)
5528 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
5529 dwarf_tag_name (child_die
->tag
));
5534 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
5536 imported_name
= dwarf2_name (imported_die
, imported_cu
);
5537 if (imported_name
== NULL
)
5539 complaint (&symfile_complaints
,
5540 _("child DW_TAG_imported_declaration has unknown "
5541 "imported name - DIE at 0x%x [in module %s]"),
5542 child_die
->offset
.sect_off
, objfile
->name
);
5546 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
5548 process_die (child_die
, cu
);
5551 cp_add_using_directive (import_prefix
,
5554 imported_declaration
,
5556 &objfile
->objfile_obstack
);
5558 do_cleanups (cleanups
);
5561 /* Cleanup function for read_file_scope. */
5564 free_cu_line_header (void *arg
)
5566 struct dwarf2_cu
*cu
= arg
;
5568 free_line_header (cu
->line_header
);
5569 cu
->line_header
= NULL
;
5573 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
5574 char **name
, char **comp_dir
)
5576 struct attribute
*attr
;
5581 /* Find the filename. Do not use dwarf2_name here, since the filename
5582 is not a source language identifier. */
5583 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5586 *name
= DW_STRING (attr
);
5589 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5591 *comp_dir
= DW_STRING (attr
);
5592 else if (*name
!= NULL
&& IS_ABSOLUTE_PATH (*name
))
5594 *comp_dir
= ldirname (*name
);
5595 if (*comp_dir
!= NULL
)
5596 make_cleanup (xfree
, *comp_dir
);
5598 if (*comp_dir
!= NULL
)
5600 /* Irix 6.2 native cc prepends <machine>.: to the compilation
5601 directory, get rid of it. */
5602 char *cp
= strchr (*comp_dir
, ':');
5604 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
5609 *name
= "<unknown>";
5612 /* Handle DW_AT_stmt_list for a compilation unit or type unit.
5613 DIE is the DW_TAG_compile_unit or DW_TAG_type_unit die for CU.
5614 COMP_DIR is the compilation directory.
5615 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
5618 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
5619 const char *comp_dir
, int want_line_info
)
5621 struct attribute
*attr
;
5622 struct objfile
*objfile
= cu
->objfile
;
5623 bfd
*abfd
= objfile
->obfd
;
5625 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
5628 unsigned int line_offset
= DW_UNSND (attr
);
5629 struct line_header
*line_header
5630 = dwarf_decode_line_header (line_offset
, abfd
, cu
);
5634 cu
->line_header
= line_header
;
5635 make_cleanup (free_cu_line_header
, cu
);
5636 dwarf_decode_lines (line_header
, comp_dir
, cu
, NULL
, want_line_info
);
5641 /* Process DW_TAG_compile_unit. */
5644 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5646 struct objfile
*objfile
= cu
->objfile
;
5647 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5648 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
5649 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
5650 struct attribute
*attr
;
5652 char *comp_dir
= NULL
;
5653 struct die_info
*child_die
;
5654 bfd
*abfd
= objfile
->obfd
;
5657 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5659 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
5661 /* If we didn't find a lowpc, set it to highpc to avoid complaints
5662 from finish_block. */
5663 if (lowpc
== ((CORE_ADDR
) -1))
5668 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
5670 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5673 set_cu_language (DW_UNSND (attr
), cu
);
5676 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5678 cu
->producer
= DW_STRING (attr
);
5680 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
5681 standardised yet. As a workaround for the language detection we fall
5682 back to the DW_AT_producer string. */
5683 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
5684 cu
->language
= language_opencl
;
5686 /* We assume that we're processing GCC output. */
5687 processing_gcc_compilation
= 2;
5689 processing_has_namespace_info
= 0;
5691 start_symtab (name
, comp_dir
, lowpc
);
5692 record_debugformat ("DWARF 2");
5693 record_producer (cu
->producer
);
5695 /* Decode line number information if present. We do this before
5696 processing child DIEs, so that the line header table is available
5697 for DW_AT_decl_file. */
5698 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, 1);
5700 /* Process all dies in compilation unit. */
5701 if (die
->child
!= NULL
)
5703 child_die
= die
->child
;
5704 while (child_die
&& child_die
->tag
)
5706 process_die (child_die
, cu
);
5707 child_die
= sibling_die (child_die
);
5711 /* Decode macro information, if present. Dwarf 2 macro information
5712 refers to information in the line number info statement program
5713 header, so we can only read it if we've read the header
5715 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
5716 if (attr
&& cu
->line_header
)
5718 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
5719 complaint (&symfile_complaints
,
5720 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
5722 dwarf_decode_macros (cu
->line_header
, DW_UNSND (attr
),
5724 &dwarf2_per_objfile
->macro
, 1);
5728 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
5729 if (attr
&& cu
->line_header
)
5731 unsigned int macro_offset
= DW_UNSND (attr
);
5733 dwarf_decode_macros (cu
->line_header
, macro_offset
,
5735 &dwarf2_per_objfile
->macinfo
, 0);
5739 do_cleanups (back_to
);
5742 /* Process DW_TAG_type_unit.
5743 For TUs we want to skip the first top level sibling if it's not the
5744 actual type being defined by this TU. In this case the first top
5745 level sibling is there to provide context only. */
5748 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5750 struct objfile
*objfile
= cu
->objfile
;
5751 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5753 struct attribute
*attr
;
5755 char *comp_dir
= NULL
;
5756 struct die_info
*child_die
;
5757 bfd
*abfd
= objfile
->obfd
;
5759 /* start_symtab needs a low pc, but we don't really have one.
5760 Do what read_file_scope would do in the absence of such info. */
5761 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5763 /* Find the filename. Do not use dwarf2_name here, since the filename
5764 is not a source language identifier. */
5765 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5767 name
= DW_STRING (attr
);
5769 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5771 comp_dir
= DW_STRING (attr
);
5772 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
5774 comp_dir
= ldirname (name
);
5775 if (comp_dir
!= NULL
)
5776 make_cleanup (xfree
, comp_dir
);
5782 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5784 set_cu_language (DW_UNSND (attr
), cu
);
5786 /* This isn't technically needed today. It is done for symmetry
5787 with read_file_scope. */
5788 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5790 cu
->producer
= DW_STRING (attr
);
5792 /* We assume that we're processing GCC output. */
5793 processing_gcc_compilation
= 2;
5795 processing_has_namespace_info
= 0;
5797 start_symtab (name
, comp_dir
, lowpc
);
5798 record_debugformat ("DWARF 2");
5799 record_producer (cu
->producer
);
5801 /* Decode line number information if present. We do this before
5802 processing child DIEs, so that the line header table is available
5803 for DW_AT_decl_file.
5804 We don't need the pc/line-number mapping for type units. */
5805 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, 0);
5807 /* Process the dies in the type unit. */
5808 if (die
->child
== NULL
)
5810 dump_die_for_error (die
);
5811 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
5812 bfd_get_filename (abfd
));
5815 child_die
= die
->child
;
5817 while (child_die
&& child_die
->tag
)
5819 process_die (child_die
, cu
);
5821 child_die
= sibling_die (child_die
);
5824 do_cleanups (back_to
);
5827 /* qsort helper for inherit_abstract_dies. */
5830 unsigned_int_compar (const void *ap
, const void *bp
)
5832 unsigned int a
= *(unsigned int *) ap
;
5833 unsigned int b
= *(unsigned int *) bp
;
5835 return (a
> b
) - (b
> a
);
5838 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
5839 Inherit only the children of the DW_AT_abstract_origin DIE not being
5840 already referenced by DW_AT_abstract_origin from the children of the
5844 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
5846 struct die_info
*child_die
;
5847 unsigned die_children_count
;
5848 /* CU offsets which were referenced by children of the current DIE. */
5849 sect_offset
*offsets
;
5850 sect_offset
*offsets_end
, *offsetp
;
5851 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
5852 struct die_info
*origin_die
;
5853 /* Iterator of the ORIGIN_DIE children. */
5854 struct die_info
*origin_child_die
;
5855 struct cleanup
*cleanups
;
5856 struct attribute
*attr
;
5857 struct dwarf2_cu
*origin_cu
;
5858 struct pending
**origin_previous_list_in_scope
;
5860 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
5864 /* Note that following die references may follow to a die in a
5868 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
5870 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
5872 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
5873 origin_cu
->list_in_scope
= cu
->list_in_scope
;
5875 if (die
->tag
!= origin_die
->tag
5876 && !(die
->tag
== DW_TAG_inlined_subroutine
5877 && origin_die
->tag
== DW_TAG_subprogram
))
5878 complaint (&symfile_complaints
,
5879 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
5880 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
5882 child_die
= die
->child
;
5883 die_children_count
= 0;
5884 while (child_die
&& child_die
->tag
)
5886 child_die
= sibling_die (child_die
);
5887 die_children_count
++;
5889 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
5890 cleanups
= make_cleanup (xfree
, offsets
);
5892 offsets_end
= offsets
;
5893 child_die
= die
->child
;
5894 while (child_die
&& child_die
->tag
)
5896 /* For each CHILD_DIE, find the corresponding child of
5897 ORIGIN_DIE. If there is more than one layer of
5898 DW_AT_abstract_origin, follow them all; there shouldn't be,
5899 but GCC versions at least through 4.4 generate this (GCC PR
5901 struct die_info
*child_origin_die
= child_die
;
5902 struct dwarf2_cu
*child_origin_cu
= cu
;
5906 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
5910 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
5914 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
5915 counterpart may exist. */
5916 if (child_origin_die
!= child_die
)
5918 if (child_die
->tag
!= child_origin_die
->tag
5919 && !(child_die
->tag
== DW_TAG_inlined_subroutine
5920 && child_origin_die
->tag
== DW_TAG_subprogram
))
5921 complaint (&symfile_complaints
,
5922 _("Child DIE 0x%x and its abstract origin 0x%x have "
5923 "different tags"), child_die
->offset
.sect_off
,
5924 child_origin_die
->offset
.sect_off
);
5925 if (child_origin_die
->parent
!= origin_die
)
5926 complaint (&symfile_complaints
,
5927 _("Child DIE 0x%x and its abstract origin 0x%x have "
5928 "different parents"), child_die
->offset
.sect_off
,
5929 child_origin_die
->offset
.sect_off
);
5931 *offsets_end
++ = child_origin_die
->offset
;
5933 child_die
= sibling_die (child_die
);
5935 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
5936 unsigned_int_compar
);
5937 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
5938 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
5939 complaint (&symfile_complaints
,
5940 _("Multiple children of DIE 0x%x refer "
5941 "to DIE 0x%x as their abstract origin"),
5942 die
->offset
.sect_off
, offsetp
->sect_off
);
5945 origin_child_die
= origin_die
->child
;
5946 while (origin_child_die
&& origin_child_die
->tag
)
5948 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
5949 while (offsetp
< offsets_end
5950 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
5952 if (offsetp
>= offsets_end
5953 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
5955 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
5956 process_die (origin_child_die
, origin_cu
);
5958 origin_child_die
= sibling_die (origin_child_die
);
5960 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
5962 do_cleanups (cleanups
);
5966 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5968 struct objfile
*objfile
= cu
->objfile
;
5969 struct context_stack
*new;
5972 struct die_info
*child_die
;
5973 struct attribute
*attr
, *call_line
, *call_file
;
5976 struct block
*block
;
5977 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
5978 VEC (symbolp
) *template_args
= NULL
;
5979 struct template_symbol
*templ_func
= NULL
;
5983 /* If we do not have call site information, we can't show the
5984 caller of this inlined function. That's too confusing, so
5985 only use the scope for local variables. */
5986 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
5987 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
5988 if (call_line
== NULL
|| call_file
== NULL
)
5990 read_lexical_block_scope (die
, cu
);
5995 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5997 name
= dwarf2_name (die
, cu
);
5999 /* Ignore functions with missing or empty names. These are actually
6000 illegal according to the DWARF standard. */
6003 complaint (&symfile_complaints
,
6004 _("missing name for subprogram DIE at %d"),
6005 die
->offset
.sect_off
);
6009 /* Ignore functions with missing or invalid low and high pc attributes. */
6010 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
6012 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
6013 if (!attr
|| !DW_UNSND (attr
))
6014 complaint (&symfile_complaints
,
6015 _("cannot get low and high bounds "
6016 "for subprogram DIE at %d"),
6017 die
->offset
.sect_off
);
6024 /* If we have any template arguments, then we must allocate a
6025 different sort of symbol. */
6026 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
6028 if (child_die
->tag
== DW_TAG_template_type_param
6029 || child_die
->tag
== DW_TAG_template_value_param
)
6031 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6032 struct template_symbol
);
6033 templ_func
->base
.is_cplus_template_function
= 1;
6038 new = push_context (0, lowpc
);
6039 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
6040 (struct symbol
*) templ_func
);
6042 /* If there is a location expression for DW_AT_frame_base, record
6044 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
6046 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
6047 expression is being recorded directly in the function's symbol
6048 and not in a separate frame-base object. I guess this hack is
6049 to avoid adding some sort of frame-base adjunct/annex to the
6050 function's symbol :-(. The problem with doing this is that it
6051 results in a function symbol with a location expression that
6052 has nothing to do with the location of the function, ouch! The
6053 relationship should be: a function's symbol has-a frame base; a
6054 frame-base has-a location expression. */
6055 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
6057 cu
->list_in_scope
= &local_symbols
;
6059 if (die
->child
!= NULL
)
6061 child_die
= die
->child
;
6062 while (child_die
&& child_die
->tag
)
6064 if (child_die
->tag
== DW_TAG_template_type_param
6065 || child_die
->tag
== DW_TAG_template_value_param
)
6067 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
6070 VEC_safe_push (symbolp
, template_args
, arg
);
6073 process_die (child_die
, cu
);
6074 child_die
= sibling_die (child_die
);
6078 inherit_abstract_dies (die
, cu
);
6080 /* If we have a DW_AT_specification, we might need to import using
6081 directives from the context of the specification DIE. See the
6082 comment in determine_prefix. */
6083 if (cu
->language
== language_cplus
6084 && dwarf2_attr (die
, DW_AT_specification
, cu
))
6086 struct dwarf2_cu
*spec_cu
= cu
;
6087 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
6091 child_die
= spec_die
->child
;
6092 while (child_die
&& child_die
->tag
)
6094 if (child_die
->tag
== DW_TAG_imported_module
)
6095 process_die (child_die
, spec_cu
);
6096 child_die
= sibling_die (child_die
);
6099 /* In some cases, GCC generates specification DIEs that
6100 themselves contain DW_AT_specification attributes. */
6101 spec_die
= die_specification (spec_die
, &spec_cu
);
6105 new = pop_context ();
6106 /* Make a block for the local symbols within. */
6107 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
6108 lowpc
, highpc
, objfile
);
6110 /* For C++, set the block's scope. */
6111 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
6112 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
6113 determine_prefix (die
, cu
),
6114 processing_has_namespace_info
);
6116 /* If we have address ranges, record them. */
6117 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
6119 /* Attach template arguments to function. */
6120 if (! VEC_empty (symbolp
, template_args
))
6122 gdb_assert (templ_func
!= NULL
);
6124 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
6125 templ_func
->template_arguments
6126 = obstack_alloc (&objfile
->objfile_obstack
,
6127 (templ_func
->n_template_arguments
6128 * sizeof (struct symbol
*)));
6129 memcpy (templ_func
->template_arguments
,
6130 VEC_address (symbolp
, template_args
),
6131 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
6132 VEC_free (symbolp
, template_args
);
6135 /* In C++, we can have functions nested inside functions (e.g., when
6136 a function declares a class that has methods). This means that
6137 when we finish processing a function scope, we may need to go
6138 back to building a containing block's symbol lists. */
6139 local_symbols
= new->locals
;
6140 param_symbols
= new->params
;
6141 using_directives
= new->using_directives
;
6143 /* If we've finished processing a top-level function, subsequent
6144 symbols go in the file symbol list. */
6145 if (outermost_context_p ())
6146 cu
->list_in_scope
= &file_symbols
;
6149 /* Process all the DIES contained within a lexical block scope. Start
6150 a new scope, process the dies, and then close the scope. */
6153 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6155 struct objfile
*objfile
= cu
->objfile
;
6156 struct context_stack
*new;
6157 CORE_ADDR lowpc
, highpc
;
6158 struct die_info
*child_die
;
6161 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6163 /* Ignore blocks with missing or invalid low and high pc attributes. */
6164 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
6165 as multiple lexical blocks? Handling children in a sane way would
6166 be nasty. Might be easier to properly extend generic blocks to
6168 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
6173 push_context (0, lowpc
);
6174 if (die
->child
!= NULL
)
6176 child_die
= die
->child
;
6177 while (child_die
&& child_die
->tag
)
6179 process_die (child_die
, cu
);
6180 child_die
= sibling_die (child_die
);
6183 new = pop_context ();
6185 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
6188 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
6191 /* Note that recording ranges after traversing children, as we
6192 do here, means that recording a parent's ranges entails
6193 walking across all its children's ranges as they appear in
6194 the address map, which is quadratic behavior.
6196 It would be nicer to record the parent's ranges before
6197 traversing its children, simply overriding whatever you find
6198 there. But since we don't even decide whether to create a
6199 block until after we've traversed its children, that's hard
6201 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
6203 local_symbols
= new->locals
;
6204 using_directives
= new->using_directives
;
6207 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
6210 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6212 struct objfile
*objfile
= cu
->objfile
;
6213 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6214 CORE_ADDR pc
, baseaddr
;
6215 struct attribute
*attr
;
6216 struct call_site
*call_site
, call_site_local
;
6219 struct die_info
*child_die
;
6221 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6223 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6226 complaint (&symfile_complaints
,
6227 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
6228 "DIE 0x%x [in module %s]"),
6229 die
->offset
.sect_off
, objfile
->name
);
6232 pc
= DW_ADDR (attr
) + baseaddr
;
6234 if (cu
->call_site_htab
== NULL
)
6235 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
6236 NULL
, &objfile
->objfile_obstack
,
6237 hashtab_obstack_allocate
, NULL
);
6238 call_site_local
.pc
= pc
;
6239 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
6242 complaint (&symfile_complaints
,
6243 _("Duplicate PC %s for DW_TAG_GNU_call_site "
6244 "DIE 0x%x [in module %s]"),
6245 paddress (gdbarch
, pc
), die
->offset
.sect_off
, objfile
->name
);
6249 /* Count parameters at the caller. */
6252 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
6253 child_die
= sibling_die (child_die
))
6255 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
6257 complaint (&symfile_complaints
,
6258 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
6259 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
6260 child_die
->tag
, child_die
->offset
.sect_off
, objfile
->name
);
6267 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
6268 (sizeof (*call_site
)
6269 + (sizeof (*call_site
->parameter
)
6272 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
6275 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
6277 struct die_info
*func_die
;
6279 /* Skip also over DW_TAG_inlined_subroutine. */
6280 for (func_die
= die
->parent
;
6281 func_die
&& func_die
->tag
!= DW_TAG_subprogram
6282 && func_die
->tag
!= DW_TAG_subroutine_type
;
6283 func_die
= func_die
->parent
);
6285 /* DW_AT_GNU_all_call_sites is a superset
6286 of DW_AT_GNU_all_tail_call_sites. */
6288 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
6289 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
6291 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
6292 not complete. But keep CALL_SITE for look ups via call_site_htab,
6293 both the initial caller containing the real return address PC and
6294 the final callee containing the current PC of a chain of tail
6295 calls do not need to have the tail call list complete. But any
6296 function candidate for a virtual tail call frame searched via
6297 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
6298 determined unambiguously. */
6302 struct type
*func_type
= NULL
;
6305 func_type
= get_die_type (func_die
, cu
);
6306 if (func_type
!= NULL
)
6308 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
6310 /* Enlist this call site to the function. */
6311 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
6312 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
6315 complaint (&symfile_complaints
,
6316 _("Cannot find function owning DW_TAG_GNU_call_site "
6317 "DIE 0x%x [in module %s]"),
6318 die
->offset
.sect_off
, objfile
->name
);
6322 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
6324 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
6325 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
6326 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
6327 /* Keep NULL DWARF_BLOCK. */;
6328 else if (attr_form_is_block (attr
))
6330 struct dwarf2_locexpr_baton
*dlbaton
;
6332 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
6333 dlbaton
->data
= DW_BLOCK (attr
)->data
;
6334 dlbaton
->size
= DW_BLOCK (attr
)->size
;
6335 dlbaton
->per_cu
= cu
->per_cu
;
6337 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
6339 else if (is_ref_attr (attr
))
6341 struct dwarf2_cu
*target_cu
= cu
;
6342 struct die_info
*target_die
;
6344 target_die
= follow_die_ref_or_sig (die
, attr
, &target_cu
);
6345 gdb_assert (target_cu
->objfile
== objfile
);
6346 if (die_is_declaration (target_die
, target_cu
))
6348 const char *target_physname
;
6350 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
6351 if (target_physname
== NULL
)
6352 complaint (&symfile_complaints
,
6353 _("DW_AT_GNU_call_site_target target DIE has invalid "
6354 "physname, for referencing DIE 0x%x [in module %s]"),
6355 die
->offset
.sect_off
, objfile
->name
);
6357 SET_FIELD_PHYSNAME (call_site
->target
, (char *) target_physname
);
6363 /* DW_AT_entry_pc should be preferred. */
6364 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
6365 complaint (&symfile_complaints
,
6366 _("DW_AT_GNU_call_site_target target DIE has invalid "
6367 "low pc, for referencing DIE 0x%x [in module %s]"),
6368 die
->offset
.sect_off
, objfile
->name
);
6370 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
+ baseaddr
);
6374 complaint (&symfile_complaints
,
6375 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
6376 "block nor reference, for DIE 0x%x [in module %s]"),
6377 die
->offset
.sect_off
, objfile
->name
);
6379 call_site
->per_cu
= cu
->per_cu
;
6381 for (child_die
= die
->child
;
6382 child_die
&& child_die
->tag
;
6383 child_die
= sibling_die (child_die
))
6385 struct dwarf2_locexpr_baton
*dlbaton
;
6386 struct call_site_parameter
*parameter
;
6388 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
6390 /* Already printed the complaint above. */
6394 gdb_assert (call_site
->parameter_count
< nparams
);
6395 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
6397 /* DW_AT_location specifies the register number. Value of the data
6398 assumed for the register is contained in DW_AT_GNU_call_site_value. */
6400 attr
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
6401 if (!attr
|| !attr_form_is_block (attr
))
6403 complaint (&symfile_complaints
,
6404 _("No DW_FORM_block* DW_AT_location for "
6405 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
6406 child_die
->offset
.sect_off
, objfile
->name
);
6409 parameter
->dwarf_reg
= dwarf_block_to_dwarf_reg (DW_BLOCK (attr
)->data
,
6410 &DW_BLOCK (attr
)->data
[DW_BLOCK (attr
)->size
]);
6411 if (parameter
->dwarf_reg
== -1
6412 && !dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (attr
)->data
,
6413 &DW_BLOCK (attr
)->data
[DW_BLOCK (attr
)->size
],
6414 ¶meter
->fb_offset
))
6416 complaint (&symfile_complaints
,
6417 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
6418 "for DW_FORM_block* DW_AT_location for "
6419 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
6420 child_die
->offset
.sect_off
, objfile
->name
);
6424 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
6425 if (!attr_form_is_block (attr
))
6427 complaint (&symfile_complaints
,
6428 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
6429 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
6430 child_die
->offset
.sect_off
, objfile
->name
);
6433 parameter
->value
= DW_BLOCK (attr
)->data
;
6434 parameter
->value_size
= DW_BLOCK (attr
)->size
;
6436 /* Parameters are not pre-cleared by memset above. */
6437 parameter
->data_value
= NULL
;
6438 parameter
->data_value_size
= 0;
6439 call_site
->parameter_count
++;
6441 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
6444 if (!attr_form_is_block (attr
))
6445 complaint (&symfile_complaints
,
6446 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
6447 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
6448 child_die
->offset
.sect_off
, objfile
->name
);
6451 parameter
->data_value
= DW_BLOCK (attr
)->data
;
6452 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
6458 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
6459 Return 1 if the attributes are present and valid, otherwise, return 0.
6460 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
6463 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
6464 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
6465 struct partial_symtab
*ranges_pst
)
6467 struct objfile
*objfile
= cu
->objfile
;
6468 struct comp_unit_head
*cu_header
= &cu
->header
;
6469 bfd
*obfd
= objfile
->obfd
;
6470 unsigned int addr_size
= cu_header
->addr_size
;
6471 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
6472 /* Base address selection entry. */
6483 found_base
= cu
->base_known
;
6484 base
= cu
->base_address
;
6486 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
6487 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
6489 complaint (&symfile_complaints
,
6490 _("Offset %d out of bounds for DW_AT_ranges attribute"),
6494 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
6496 /* Read in the largest possible address. */
6497 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
6498 if ((marker
& mask
) == mask
)
6500 /* If we found the largest possible address, then
6501 read the base address. */
6502 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
6503 buffer
+= 2 * addr_size
;
6504 offset
+= 2 * addr_size
;
6510 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6514 CORE_ADDR range_beginning
, range_end
;
6516 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
6517 buffer
+= addr_size
;
6518 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
6519 buffer
+= addr_size
;
6520 offset
+= 2 * addr_size
;
6522 /* An end of list marker is a pair of zero addresses. */
6523 if (range_beginning
== 0 && range_end
== 0)
6524 /* Found the end of list entry. */
6527 /* Each base address selection entry is a pair of 2 values.
6528 The first is the largest possible address, the second is
6529 the base address. Check for a base address here. */
6530 if ((range_beginning
& mask
) == mask
)
6532 /* If we found the largest possible address, then
6533 read the base address. */
6534 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
6541 /* We have no valid base address for the ranges
6543 complaint (&symfile_complaints
,
6544 _("Invalid .debug_ranges data (no base address)"));
6548 if (range_beginning
> range_end
)
6550 /* Inverted range entries are invalid. */
6551 complaint (&symfile_complaints
,
6552 _("Invalid .debug_ranges data (inverted range)"));
6556 /* Empty range entries have no effect. */
6557 if (range_beginning
== range_end
)
6560 range_beginning
+= base
;
6563 if (ranges_pst
!= NULL
)
6564 addrmap_set_empty (objfile
->psymtabs_addrmap
,
6565 range_beginning
+ baseaddr
,
6566 range_end
- 1 + baseaddr
,
6569 /* FIXME: This is recording everything as a low-high
6570 segment of consecutive addresses. We should have a
6571 data structure for discontiguous block ranges
6575 low
= range_beginning
;
6581 if (range_beginning
< low
)
6582 low
= range_beginning
;
6583 if (range_end
> high
)
6589 /* If the first entry is an end-of-list marker, the range
6590 describes an empty scope, i.e. no instructions. */
6596 *high_return
= high
;
6600 /* Get low and high pc attributes from a die. Return 1 if the attributes
6601 are present and valid, otherwise, return 0. Return -1 if the range is
6602 discontinuous, i.e. derived from DW_AT_ranges information. */
6605 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
6606 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
6607 struct partial_symtab
*pst
)
6609 struct attribute
*attr
;
6614 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
6617 high
= DW_ADDR (attr
);
6618 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6620 low
= DW_ADDR (attr
);
6622 /* Found high w/o low attribute. */
6625 /* Found consecutive range of addresses. */
6630 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
6633 /* Value of the DW_AT_ranges attribute is the offset in the
6634 .debug_ranges section. */
6635 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
6637 /* Found discontinuous range of addresses. */
6642 /* read_partial_die has also the strict LOW < HIGH requirement. */
6646 /* When using the GNU linker, .gnu.linkonce. sections are used to
6647 eliminate duplicate copies of functions and vtables and such.
6648 The linker will arbitrarily choose one and discard the others.
6649 The AT_*_pc values for such functions refer to local labels in
6650 these sections. If the section from that file was discarded, the
6651 labels are not in the output, so the relocs get a value of 0.
6652 If this is a discarded function, mark the pc bounds as invalid,
6653 so that GDB will ignore it. */
6654 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
6663 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
6664 its low and high PC addresses. Do nothing if these addresses could not
6665 be determined. Otherwise, set LOWPC to the low address if it is smaller,
6666 and HIGHPC to the high address if greater than HIGHPC. */
6669 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
6670 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6671 struct dwarf2_cu
*cu
)
6673 CORE_ADDR low
, high
;
6674 struct die_info
*child
= die
->child
;
6676 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
6678 *lowpc
= min (*lowpc
, low
);
6679 *highpc
= max (*highpc
, high
);
6682 /* If the language does not allow nested subprograms (either inside
6683 subprograms or lexical blocks), we're done. */
6684 if (cu
->language
!= language_ada
)
6687 /* Check all the children of the given DIE. If it contains nested
6688 subprograms, then check their pc bounds. Likewise, we need to
6689 check lexical blocks as well, as they may also contain subprogram
6691 while (child
&& child
->tag
)
6693 if (child
->tag
== DW_TAG_subprogram
6694 || child
->tag
== DW_TAG_lexical_block
)
6695 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
6696 child
= sibling_die (child
);
6700 /* Get the low and high pc's represented by the scope DIE, and store
6701 them in *LOWPC and *HIGHPC. If the correct values can't be
6702 determined, set *LOWPC to -1 and *HIGHPC to 0. */
6705 get_scope_pc_bounds (struct die_info
*die
,
6706 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6707 struct dwarf2_cu
*cu
)
6709 CORE_ADDR best_low
= (CORE_ADDR
) -1;
6710 CORE_ADDR best_high
= (CORE_ADDR
) 0;
6711 CORE_ADDR current_low
, current_high
;
6713 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
6715 best_low
= current_low
;
6716 best_high
= current_high
;
6720 struct die_info
*child
= die
->child
;
6722 while (child
&& child
->tag
)
6724 switch (child
->tag
) {
6725 case DW_TAG_subprogram
:
6726 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
6728 case DW_TAG_namespace
:
6730 /* FIXME: carlton/2004-01-16: Should we do this for
6731 DW_TAG_class_type/DW_TAG_structure_type, too? I think
6732 that current GCC's always emit the DIEs corresponding
6733 to definitions of methods of classes as children of a
6734 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
6735 the DIEs giving the declarations, which could be
6736 anywhere). But I don't see any reason why the
6737 standards says that they have to be there. */
6738 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
6740 if (current_low
!= ((CORE_ADDR
) -1))
6742 best_low
= min (best_low
, current_low
);
6743 best_high
= max (best_high
, current_high
);
6751 child
= sibling_die (child
);
6756 *highpc
= best_high
;
6759 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
6763 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
6764 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
6766 struct objfile
*objfile
= cu
->objfile
;
6767 struct attribute
*attr
;
6769 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
6772 CORE_ADDR high
= DW_ADDR (attr
);
6774 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6777 CORE_ADDR low
= DW_ADDR (attr
);
6779 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
6783 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
6786 bfd
*obfd
= objfile
->obfd
;
6788 /* The value of the DW_AT_ranges attribute is the offset of the
6789 address range list in the .debug_ranges section. */
6790 unsigned long offset
= DW_UNSND (attr
);
6791 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
6793 /* For some target architectures, but not others, the
6794 read_address function sign-extends the addresses it returns.
6795 To recognize base address selection entries, we need a
6797 unsigned int addr_size
= cu
->header
.addr_size
;
6798 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
6800 /* The base address, to which the next pair is relative. Note
6801 that this 'base' is a DWARF concept: most entries in a range
6802 list are relative, to reduce the number of relocs against the
6803 debugging information. This is separate from this function's
6804 'baseaddr' argument, which GDB uses to relocate debugging
6805 information from a shared library based on the address at
6806 which the library was loaded. */
6807 CORE_ADDR base
= cu
->base_address
;
6808 int base_known
= cu
->base_known
;
6810 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
6811 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
6813 complaint (&symfile_complaints
,
6814 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
6821 unsigned int bytes_read
;
6822 CORE_ADDR start
, end
;
6824 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
6825 buffer
+= bytes_read
;
6826 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
6827 buffer
+= bytes_read
;
6829 /* Did we find the end of the range list? */
6830 if (start
== 0 && end
== 0)
6833 /* Did we find a base address selection entry? */
6834 else if ((start
& base_select_mask
) == base_select_mask
)
6840 /* We found an ordinary address range. */
6845 complaint (&symfile_complaints
,
6846 _("Invalid .debug_ranges data "
6847 "(no base address)"));
6853 /* Inverted range entries are invalid. */
6854 complaint (&symfile_complaints
,
6855 _("Invalid .debug_ranges data "
6856 "(inverted range)"));
6860 /* Empty range entries have no effect. */
6864 record_block_range (block
,
6865 baseaddr
+ base
+ start
,
6866 baseaddr
+ base
+ end
- 1);
6872 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
6873 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
6874 during 4.6.0 experimental. */
6877 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
6880 int major
, minor
, release
;
6883 if (cu
->producer
== NULL
)
6885 /* For unknown compilers expect their behavior is DWARF version
6888 GCC started to support .debug_types sections by -gdwarf-4 since
6889 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
6890 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
6891 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
6892 interpreted incorrectly by GDB now - GCC PR debug/48229. */
6897 if (cu
->checked_producer
)
6898 return cu
->producer_is_gxx_lt_4_6
;
6900 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
6902 if (strncmp (cu
->producer
, "GNU ", strlen ("GNU ")) != 0)
6904 /* For non-GCC compilers expect their behavior is DWARF version
6909 cs
= &cu
->producer
[strlen ("GNU ")];
6910 while (*cs
&& !isdigit (*cs
))
6912 if (sscanf (cs
, "%d.%d.%d", &major
, &minor
, &release
) != 3)
6914 /* Not recognized as GCC. */
6917 result
= major
< 4 || (major
== 4 && minor
< 6);
6920 cu
->checked_producer
= 1;
6921 cu
->producer_is_gxx_lt_4_6
= result
;
6926 /* Return the default accessibility type if it is not overriden by
6927 DW_AT_accessibility. */
6929 static enum dwarf_access_attribute
6930 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
6932 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
6934 /* The default DWARF 2 accessibility for members is public, the default
6935 accessibility for inheritance is private. */
6937 if (die
->tag
!= DW_TAG_inheritance
)
6938 return DW_ACCESS_public
;
6940 return DW_ACCESS_private
;
6944 /* DWARF 3+ defines the default accessibility a different way. The same
6945 rules apply now for DW_TAG_inheritance as for the members and it only
6946 depends on the container kind. */
6948 if (die
->parent
->tag
== DW_TAG_class_type
)
6949 return DW_ACCESS_private
;
6951 return DW_ACCESS_public
;
6955 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
6956 offset. If the attribute was not found return 0, otherwise return
6957 1. If it was found but could not properly be handled, set *OFFSET
6961 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
6964 struct attribute
*attr
;
6966 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6971 /* Note that we do not check for a section offset first here.
6972 This is because DW_AT_data_member_location is new in DWARF 4,
6973 so if we see it, we can assume that a constant form is really
6974 a constant and not a section offset. */
6975 if (attr_form_is_constant (attr
))
6976 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
6977 else if (attr_form_is_section_offset (attr
))
6978 dwarf2_complex_location_expr_complaint ();
6979 else if (attr_form_is_block (attr
))
6980 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6982 dwarf2_complex_location_expr_complaint ();
6990 /* Add an aggregate field to the field list. */
6993 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
6994 struct dwarf2_cu
*cu
)
6996 struct objfile
*objfile
= cu
->objfile
;
6997 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6998 struct nextfield
*new_field
;
6999 struct attribute
*attr
;
7001 char *fieldname
= "";
7003 /* Allocate a new field list entry and link it in. */
7004 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
7005 make_cleanup (xfree
, new_field
);
7006 memset (new_field
, 0, sizeof (struct nextfield
));
7008 if (die
->tag
== DW_TAG_inheritance
)
7010 new_field
->next
= fip
->baseclasses
;
7011 fip
->baseclasses
= new_field
;
7015 new_field
->next
= fip
->fields
;
7016 fip
->fields
= new_field
;
7020 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
7022 new_field
->accessibility
= DW_UNSND (attr
);
7024 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
7025 if (new_field
->accessibility
!= DW_ACCESS_public
)
7026 fip
->non_public_fields
= 1;
7028 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
7030 new_field
->virtuality
= DW_UNSND (attr
);
7032 new_field
->virtuality
= DW_VIRTUALITY_none
;
7034 fp
= &new_field
->field
;
7036 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
7040 /* Data member other than a C++ static data member. */
7042 /* Get type of field. */
7043 fp
->type
= die_type (die
, cu
);
7045 SET_FIELD_BITPOS (*fp
, 0);
7047 /* Get bit size of field (zero if none). */
7048 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
7051 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
7055 FIELD_BITSIZE (*fp
) = 0;
7058 /* Get bit offset of field. */
7059 if (handle_data_member_location (die
, cu
, &offset
))
7060 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
7061 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
7064 if (gdbarch_bits_big_endian (gdbarch
))
7066 /* For big endian bits, the DW_AT_bit_offset gives the
7067 additional bit offset from the MSB of the containing
7068 anonymous object to the MSB of the field. We don't
7069 have to do anything special since we don't need to
7070 know the size of the anonymous object. */
7071 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
7075 /* For little endian bits, compute the bit offset to the
7076 MSB of the anonymous object, subtract off the number of
7077 bits from the MSB of the field to the MSB of the
7078 object, and then subtract off the number of bits of
7079 the field itself. The result is the bit offset of
7080 the LSB of the field. */
7082 int bit_offset
= DW_UNSND (attr
);
7084 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7087 /* The size of the anonymous object containing
7088 the bit field is explicit, so use the
7089 indicated size (in bytes). */
7090 anonymous_size
= DW_UNSND (attr
);
7094 /* The size of the anonymous object containing
7095 the bit field must be inferred from the type
7096 attribute of the data member containing the
7098 anonymous_size
= TYPE_LENGTH (fp
->type
);
7100 SET_FIELD_BITPOS (*fp
,
7102 + anonymous_size
* bits_per_byte
7103 - bit_offset
- FIELD_BITSIZE (*fp
)));
7107 /* Get name of field. */
7108 fieldname
= dwarf2_name (die
, cu
);
7109 if (fieldname
== NULL
)
7112 /* The name is already allocated along with this objfile, so we don't
7113 need to duplicate it for the type. */
7114 fp
->name
= fieldname
;
7116 /* Change accessibility for artificial fields (e.g. virtual table
7117 pointer or virtual base class pointer) to private. */
7118 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
7120 FIELD_ARTIFICIAL (*fp
) = 1;
7121 new_field
->accessibility
= DW_ACCESS_private
;
7122 fip
->non_public_fields
= 1;
7125 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
7127 /* C++ static member. */
7129 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
7130 is a declaration, but all versions of G++ as of this writing
7131 (so through at least 3.2.1) incorrectly generate
7132 DW_TAG_variable tags. */
7134 const char *physname
;
7136 /* Get name of field. */
7137 fieldname
= dwarf2_name (die
, cu
);
7138 if (fieldname
== NULL
)
7141 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7143 /* Only create a symbol if this is an external value.
7144 new_symbol checks this and puts the value in the global symbol
7145 table, which we want. If it is not external, new_symbol
7146 will try to put the value in cu->list_in_scope which is wrong. */
7147 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
7149 /* A static const member, not much different than an enum as far as
7150 we're concerned, except that we can support more types. */
7151 new_symbol (die
, NULL
, cu
);
7154 /* Get physical name. */
7155 physname
= dwarf2_physname (fieldname
, die
, cu
);
7157 /* The name is already allocated along with this objfile, so we don't
7158 need to duplicate it for the type. */
7159 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
7160 FIELD_TYPE (*fp
) = die_type (die
, cu
);
7161 FIELD_NAME (*fp
) = fieldname
;
7163 else if (die
->tag
== DW_TAG_inheritance
)
7167 /* C++ base class field. */
7168 if (handle_data_member_location (die
, cu
, &offset
))
7169 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
7170 FIELD_BITSIZE (*fp
) = 0;
7171 FIELD_TYPE (*fp
) = die_type (die
, cu
);
7172 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
7173 fip
->nbaseclasses
++;
7177 /* Add a typedef defined in the scope of the FIP's class. */
7180 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
7181 struct dwarf2_cu
*cu
)
7183 struct objfile
*objfile
= cu
->objfile
;
7184 struct typedef_field_list
*new_field
;
7185 struct attribute
*attr
;
7186 struct typedef_field
*fp
;
7187 char *fieldname
= "";
7189 /* Allocate a new field list entry and link it in. */
7190 new_field
= xzalloc (sizeof (*new_field
));
7191 make_cleanup (xfree
, new_field
);
7193 gdb_assert (die
->tag
== DW_TAG_typedef
);
7195 fp
= &new_field
->field
;
7197 /* Get name of field. */
7198 fp
->name
= dwarf2_name (die
, cu
);
7199 if (fp
->name
== NULL
)
7202 fp
->type
= read_type_die (die
, cu
);
7204 new_field
->next
= fip
->typedef_field_list
;
7205 fip
->typedef_field_list
= new_field
;
7206 fip
->typedef_field_list_count
++;
7209 /* Create the vector of fields, and attach it to the type. */
7212 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
7213 struct dwarf2_cu
*cu
)
7215 int nfields
= fip
->nfields
;
7217 /* Record the field count, allocate space for the array of fields,
7218 and create blank accessibility bitfields if necessary. */
7219 TYPE_NFIELDS (type
) = nfields
;
7220 TYPE_FIELDS (type
) = (struct field
*)
7221 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
7222 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
7224 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
7226 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7228 TYPE_FIELD_PRIVATE_BITS (type
) =
7229 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
7230 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
7232 TYPE_FIELD_PROTECTED_BITS (type
) =
7233 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
7234 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
7236 TYPE_FIELD_IGNORE_BITS (type
) =
7237 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
7238 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
7241 /* If the type has baseclasses, allocate and clear a bit vector for
7242 TYPE_FIELD_VIRTUAL_BITS. */
7243 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
7245 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
7246 unsigned char *pointer
;
7248 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7249 pointer
= TYPE_ALLOC (type
, num_bytes
);
7250 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
7251 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
7252 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
7255 /* Copy the saved-up fields into the field vector. Start from the head of
7256 the list, adding to the tail of the field array, so that they end up in
7257 the same order in the array in which they were added to the list. */
7258 while (nfields
-- > 0)
7260 struct nextfield
*fieldp
;
7264 fieldp
= fip
->fields
;
7265 fip
->fields
= fieldp
->next
;
7269 fieldp
= fip
->baseclasses
;
7270 fip
->baseclasses
= fieldp
->next
;
7273 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
7274 switch (fieldp
->accessibility
)
7276 case DW_ACCESS_private
:
7277 if (cu
->language
!= language_ada
)
7278 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
7281 case DW_ACCESS_protected
:
7282 if (cu
->language
!= language_ada
)
7283 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
7286 case DW_ACCESS_public
:
7290 /* Unknown accessibility. Complain and treat it as public. */
7292 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
7293 fieldp
->accessibility
);
7297 if (nfields
< fip
->nbaseclasses
)
7299 switch (fieldp
->virtuality
)
7301 case DW_VIRTUALITY_virtual
:
7302 case DW_VIRTUALITY_pure_virtual
:
7303 if (cu
->language
== language_ada
)
7304 error (_("unexpected virtuality in component of Ada type"));
7305 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
7312 /* Add a member function to the proper fieldlist. */
7315 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
7316 struct type
*type
, struct dwarf2_cu
*cu
)
7318 struct objfile
*objfile
= cu
->objfile
;
7319 struct attribute
*attr
;
7320 struct fnfieldlist
*flp
;
7322 struct fn_field
*fnp
;
7324 struct nextfnfield
*new_fnfield
;
7325 struct type
*this_type
;
7326 enum dwarf_access_attribute accessibility
;
7328 if (cu
->language
== language_ada
)
7329 error (_("unexpected member function in Ada type"));
7331 /* Get name of member function. */
7332 fieldname
= dwarf2_name (die
, cu
);
7333 if (fieldname
== NULL
)
7336 /* Look up member function name in fieldlist. */
7337 for (i
= 0; i
< fip
->nfnfields
; i
++)
7339 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
7343 /* Create new list element if necessary. */
7344 if (i
< fip
->nfnfields
)
7345 flp
= &fip
->fnfieldlists
[i
];
7348 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
7350 fip
->fnfieldlists
= (struct fnfieldlist
*)
7351 xrealloc (fip
->fnfieldlists
,
7352 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
7353 * sizeof (struct fnfieldlist
));
7354 if (fip
->nfnfields
== 0)
7355 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
7357 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
7358 flp
->name
= fieldname
;
7361 i
= fip
->nfnfields
++;
7364 /* Create a new member function field and chain it to the field list
7366 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
7367 make_cleanup (xfree
, new_fnfield
);
7368 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
7369 new_fnfield
->next
= flp
->head
;
7370 flp
->head
= new_fnfield
;
7373 /* Fill in the member function field info. */
7374 fnp
= &new_fnfield
->fnfield
;
7376 /* Delay processing of the physname until later. */
7377 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
7379 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
7384 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
7385 fnp
->physname
= physname
? physname
: "";
7388 fnp
->type
= alloc_type (objfile
);
7389 this_type
= read_type_die (die
, cu
);
7390 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
7392 int nparams
= TYPE_NFIELDS (this_type
);
7394 /* TYPE is the domain of this method, and THIS_TYPE is the type
7395 of the method itself (TYPE_CODE_METHOD). */
7396 smash_to_method_type (fnp
->type
, type
,
7397 TYPE_TARGET_TYPE (this_type
),
7398 TYPE_FIELDS (this_type
),
7399 TYPE_NFIELDS (this_type
),
7400 TYPE_VARARGS (this_type
));
7402 /* Handle static member functions.
7403 Dwarf2 has no clean way to discern C++ static and non-static
7404 member functions. G++ helps GDB by marking the first
7405 parameter for non-static member functions (which is the this
7406 pointer) as artificial. We obtain this information from
7407 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
7408 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
7409 fnp
->voffset
= VOFFSET_STATIC
;
7412 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
7413 dwarf2_full_name (fieldname
, die
, cu
));
7415 /* Get fcontext from DW_AT_containing_type if present. */
7416 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
7417 fnp
->fcontext
= die_containing_type (die
, cu
);
7419 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
7420 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
7422 /* Get accessibility. */
7423 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
7425 accessibility
= DW_UNSND (attr
);
7427 accessibility
= dwarf2_default_access_attribute (die
, cu
);
7428 switch (accessibility
)
7430 case DW_ACCESS_private
:
7431 fnp
->is_private
= 1;
7433 case DW_ACCESS_protected
:
7434 fnp
->is_protected
= 1;
7438 /* Check for artificial methods. */
7439 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
7440 if (attr
&& DW_UNSND (attr
) != 0)
7441 fnp
->is_artificial
= 1;
7443 /* Get index in virtual function table if it is a virtual member
7444 function. For older versions of GCC, this is an offset in the
7445 appropriate virtual table, as specified by DW_AT_containing_type.
7446 For everyone else, it is an expression to be evaluated relative
7447 to the object address. */
7449 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
7452 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
7454 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
7456 /* Old-style GCC. */
7457 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
7459 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
7460 || (DW_BLOCK (attr
)->size
> 1
7461 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
7462 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
7464 struct dwarf_block blk
;
7467 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
7469 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
7470 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
7471 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
7472 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
7473 dwarf2_complex_location_expr_complaint ();
7475 fnp
->voffset
/= cu
->header
.addr_size
;
7479 dwarf2_complex_location_expr_complaint ();
7482 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
7484 else if (attr_form_is_section_offset (attr
))
7486 dwarf2_complex_location_expr_complaint ();
7490 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
7496 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
7497 if (attr
&& DW_UNSND (attr
))
7499 /* GCC does this, as of 2008-08-25; PR debug/37237. */
7500 complaint (&symfile_complaints
,
7501 _("Member function \"%s\" (offset %d) is virtual "
7502 "but the vtable offset is not specified"),
7503 fieldname
, die
->offset
.sect_off
);
7504 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7505 TYPE_CPLUS_DYNAMIC (type
) = 1;
7510 /* Create the vector of member function fields, and attach it to the type. */
7513 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
7514 struct dwarf2_cu
*cu
)
7516 struct fnfieldlist
*flp
;
7519 if (cu
->language
== language_ada
)
7520 error (_("unexpected member functions in Ada type"));
7522 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7523 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
7524 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
7526 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
7528 struct nextfnfield
*nfp
= flp
->head
;
7529 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
7532 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
7533 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
7534 fn_flp
->fn_fields
= (struct fn_field
*)
7535 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
7536 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
7537 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
7540 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
7543 /* Returns non-zero if NAME is the name of a vtable member in CU's
7544 language, zero otherwise. */
7546 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
7548 static const char vptr
[] = "_vptr";
7549 static const char vtable
[] = "vtable";
7551 /* Look for the C++ and Java forms of the vtable. */
7552 if ((cu
->language
== language_java
7553 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
7554 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
7555 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
7561 /* GCC outputs unnamed structures that are really pointers to member
7562 functions, with the ABI-specified layout. If TYPE describes
7563 such a structure, smash it into a member function type.
7565 GCC shouldn't do this; it should just output pointer to member DIEs.
7566 This is GCC PR debug/28767. */
7569 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
7571 struct type
*pfn_type
, *domain_type
, *new_type
;
7573 /* Check for a structure with no name and two children. */
7574 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
7577 /* Check for __pfn and __delta members. */
7578 if (TYPE_FIELD_NAME (type
, 0) == NULL
7579 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
7580 || TYPE_FIELD_NAME (type
, 1) == NULL
7581 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
7584 /* Find the type of the method. */
7585 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
7586 if (pfn_type
== NULL
7587 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
7588 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
7591 /* Look for the "this" argument. */
7592 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
7593 if (TYPE_NFIELDS (pfn_type
) == 0
7594 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
7595 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
7598 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
7599 new_type
= alloc_type (objfile
);
7600 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
7601 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
7602 TYPE_VARARGS (pfn_type
));
7603 smash_to_methodptr_type (type
, new_type
);
7606 /* Called when we find the DIE that starts a structure or union scope
7607 (definition) to create a type for the structure or union. Fill in
7608 the type's name and general properties; the members will not be
7609 processed until process_structure_type.
7611 NOTE: we need to call these functions regardless of whether or not the
7612 DIE has a DW_AT_name attribute, since it might be an anonymous
7613 structure or union. This gets the type entered into our set of
7616 However, if the structure is incomplete (an opaque struct/union)
7617 then suppress creating a symbol table entry for it since gdb only
7618 wants to find the one with the complete definition. Note that if
7619 it is complete, we just call new_symbol, which does it's own
7620 checking about whether the struct/union is anonymous or not (and
7621 suppresses creating a symbol table entry itself). */
7623 static struct type
*
7624 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7626 struct objfile
*objfile
= cu
->objfile
;
7628 struct attribute
*attr
;
7631 /* If the definition of this type lives in .debug_types, read that type.
7632 Don't follow DW_AT_specification though, that will take us back up
7633 the chain and we want to go down. */
7634 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
7637 struct dwarf2_cu
*type_cu
= cu
;
7638 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
7640 /* We could just recurse on read_structure_type, but we need to call
7641 get_die_type to ensure only one type for this DIE is created.
7642 This is important, for example, because for c++ classes we need
7643 TYPE_NAME set which is only done by new_symbol. Blech. */
7644 type
= read_type_die (type_die
, type_cu
);
7646 /* TYPE_CU may not be the same as CU.
7647 Ensure TYPE is recorded in CU's type_hash table. */
7648 return set_die_type (die
, type
, cu
);
7651 type
= alloc_type (objfile
);
7652 INIT_CPLUS_SPECIFIC (type
);
7654 name
= dwarf2_name (die
, cu
);
7657 if (cu
->language
== language_cplus
7658 || cu
->language
== language_java
)
7660 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
7662 /* dwarf2_full_name might have already finished building the DIE's
7663 type. If so, there is no need to continue. */
7664 if (get_die_type (die
, cu
) != NULL
)
7665 return get_die_type (die
, cu
);
7667 TYPE_TAG_NAME (type
) = full_name
;
7668 if (die
->tag
== DW_TAG_structure_type
7669 || die
->tag
== DW_TAG_class_type
)
7670 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
7674 /* The name is already allocated along with this objfile, so
7675 we don't need to duplicate it for the type. */
7676 TYPE_TAG_NAME (type
) = (char *) name
;
7677 if (die
->tag
== DW_TAG_class_type
)
7678 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
7682 if (die
->tag
== DW_TAG_structure_type
)
7684 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
7686 else if (die
->tag
== DW_TAG_union_type
)
7688 TYPE_CODE (type
) = TYPE_CODE_UNION
;
7692 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
7695 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
7696 TYPE_DECLARED_CLASS (type
) = 1;
7698 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7701 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7705 TYPE_LENGTH (type
) = 0;
7708 TYPE_STUB_SUPPORTED (type
) = 1;
7709 if (die_is_declaration (die
, cu
))
7710 TYPE_STUB (type
) = 1;
7711 else if (attr
== NULL
&& die
->child
== NULL
7712 && producer_is_realview (cu
->producer
))
7713 /* RealView does not output the required DW_AT_declaration
7714 on incomplete types. */
7715 TYPE_STUB (type
) = 1;
7717 /* We need to add the type field to the die immediately so we don't
7718 infinitely recurse when dealing with pointers to the structure
7719 type within the structure itself. */
7720 set_die_type (die
, type
, cu
);
7722 /* set_die_type should be already done. */
7723 set_descriptive_type (type
, die
, cu
);
7728 /* Finish creating a structure or union type, including filling in
7729 its members and creating a symbol for it. */
7732 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7734 struct objfile
*objfile
= cu
->objfile
;
7735 struct die_info
*child_die
= die
->child
;
7738 type
= get_die_type (die
, cu
);
7740 type
= read_structure_type (die
, cu
);
7742 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
7744 struct field_info fi
;
7745 struct die_info
*child_die
;
7746 VEC (symbolp
) *template_args
= NULL
;
7747 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
7749 memset (&fi
, 0, sizeof (struct field_info
));
7751 child_die
= die
->child
;
7753 while (child_die
&& child_die
->tag
)
7755 if (child_die
->tag
== DW_TAG_member
7756 || child_die
->tag
== DW_TAG_variable
)
7758 /* NOTE: carlton/2002-11-05: A C++ static data member
7759 should be a DW_TAG_member that is a declaration, but
7760 all versions of G++ as of this writing (so through at
7761 least 3.2.1) incorrectly generate DW_TAG_variable
7762 tags for them instead. */
7763 dwarf2_add_field (&fi
, child_die
, cu
);
7765 else if (child_die
->tag
== DW_TAG_subprogram
)
7767 /* C++ member function. */
7768 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
7770 else if (child_die
->tag
== DW_TAG_inheritance
)
7772 /* C++ base class field. */
7773 dwarf2_add_field (&fi
, child_die
, cu
);
7775 else if (child_die
->tag
== DW_TAG_typedef
)
7776 dwarf2_add_typedef (&fi
, child_die
, cu
);
7777 else if (child_die
->tag
== DW_TAG_template_type_param
7778 || child_die
->tag
== DW_TAG_template_value_param
)
7780 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
7783 VEC_safe_push (symbolp
, template_args
, arg
);
7786 child_die
= sibling_die (child_die
);
7789 /* Attach template arguments to type. */
7790 if (! VEC_empty (symbolp
, template_args
))
7792 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7793 TYPE_N_TEMPLATE_ARGUMENTS (type
)
7794 = VEC_length (symbolp
, template_args
);
7795 TYPE_TEMPLATE_ARGUMENTS (type
)
7796 = obstack_alloc (&objfile
->objfile_obstack
,
7797 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
7798 * sizeof (struct symbol
*)));
7799 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
7800 VEC_address (symbolp
, template_args
),
7801 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
7802 * sizeof (struct symbol
*)));
7803 VEC_free (symbolp
, template_args
);
7806 /* Attach fields and member functions to the type. */
7808 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
7811 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
7813 /* Get the type which refers to the base class (possibly this
7814 class itself) which contains the vtable pointer for the current
7815 class from the DW_AT_containing_type attribute. This use of
7816 DW_AT_containing_type is a GNU extension. */
7818 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
7820 struct type
*t
= die_containing_type (die
, cu
);
7822 TYPE_VPTR_BASETYPE (type
) = t
;
7827 /* Our own class provides vtbl ptr. */
7828 for (i
= TYPE_NFIELDS (t
) - 1;
7829 i
>= TYPE_N_BASECLASSES (t
);
7832 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
7834 if (is_vtable_name (fieldname
, cu
))
7836 TYPE_VPTR_FIELDNO (type
) = i
;
7841 /* Complain if virtual function table field not found. */
7842 if (i
< TYPE_N_BASECLASSES (t
))
7843 complaint (&symfile_complaints
,
7844 _("virtual function table pointer "
7845 "not found when defining class '%s'"),
7846 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
7851 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
7854 else if (cu
->producer
7855 && strncmp (cu
->producer
,
7856 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
7858 /* The IBM XLC compiler does not provide direct indication
7859 of the containing type, but the vtable pointer is
7860 always named __vfp. */
7864 for (i
= TYPE_NFIELDS (type
) - 1;
7865 i
>= TYPE_N_BASECLASSES (type
);
7868 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
7870 TYPE_VPTR_FIELDNO (type
) = i
;
7871 TYPE_VPTR_BASETYPE (type
) = type
;
7878 /* Copy fi.typedef_field_list linked list elements content into the
7879 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
7880 if (fi
.typedef_field_list
)
7882 int i
= fi
.typedef_field_list_count
;
7884 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7885 TYPE_TYPEDEF_FIELD_ARRAY (type
)
7886 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
7887 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
7889 /* Reverse the list order to keep the debug info elements order. */
7892 struct typedef_field
*dest
, *src
;
7894 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
7895 src
= &fi
.typedef_field_list
->field
;
7896 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
7901 do_cleanups (back_to
);
7903 if (HAVE_CPLUS_STRUCT (type
))
7904 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
7907 quirk_gcc_member_function_pointer (type
, objfile
);
7909 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
7910 snapshots) has been known to create a die giving a declaration
7911 for a class that has, as a child, a die giving a definition for a
7912 nested class. So we have to process our children even if the
7913 current die is a declaration. Normally, of course, a declaration
7914 won't have any children at all. */
7916 while (child_die
!= NULL
&& child_die
->tag
)
7918 if (child_die
->tag
== DW_TAG_member
7919 || child_die
->tag
== DW_TAG_variable
7920 || child_die
->tag
== DW_TAG_inheritance
7921 || child_die
->tag
== DW_TAG_template_value_param
7922 || child_die
->tag
== DW_TAG_template_type_param
)
7927 process_die (child_die
, cu
);
7929 child_die
= sibling_die (child_die
);
7932 /* Do not consider external references. According to the DWARF standard,
7933 these DIEs are identified by the fact that they have no byte_size
7934 attribute, and a declaration attribute. */
7935 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
7936 || !die_is_declaration (die
, cu
))
7937 new_symbol (die
, type
, cu
);
7940 /* Given a DW_AT_enumeration_type die, set its type. We do not
7941 complete the type's fields yet, or create any symbols. */
7943 static struct type
*
7944 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7946 struct objfile
*objfile
= cu
->objfile
;
7948 struct attribute
*attr
;
7951 /* If the definition of this type lives in .debug_types, read that type.
7952 Don't follow DW_AT_specification though, that will take us back up
7953 the chain and we want to go down. */
7954 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
7957 struct dwarf2_cu
*type_cu
= cu
;
7958 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
7960 type
= read_type_die (type_die
, type_cu
);
7962 /* TYPE_CU may not be the same as CU.
7963 Ensure TYPE is recorded in CU's type_hash table. */
7964 return set_die_type (die
, type
, cu
);
7967 type
= alloc_type (objfile
);
7969 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
7970 name
= dwarf2_full_name (NULL
, die
, cu
);
7972 TYPE_TAG_NAME (type
) = (char *) name
;
7974 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7977 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7981 TYPE_LENGTH (type
) = 0;
7984 /* The enumeration DIE can be incomplete. In Ada, any type can be
7985 declared as private in the package spec, and then defined only
7986 inside the package body. Such types are known as Taft Amendment
7987 Types. When another package uses such a type, an incomplete DIE
7988 may be generated by the compiler. */
7989 if (die_is_declaration (die
, cu
))
7990 TYPE_STUB (type
) = 1;
7992 return set_die_type (die
, type
, cu
);
7995 /* Given a pointer to a die which begins an enumeration, process all
7996 the dies that define the members of the enumeration, and create the
7997 symbol for the enumeration type.
7999 NOTE: We reverse the order of the element list. */
8002 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8004 struct type
*this_type
;
8006 this_type
= get_die_type (die
, cu
);
8007 if (this_type
== NULL
)
8008 this_type
= read_enumeration_type (die
, cu
);
8010 if (die
->child
!= NULL
)
8012 struct die_info
*child_die
;
8014 struct field
*fields
= NULL
;
8016 int unsigned_enum
= 1;
8021 child_die
= die
->child
;
8022 while (child_die
&& child_die
->tag
)
8024 if (child_die
->tag
!= DW_TAG_enumerator
)
8026 process_die (child_die
, cu
);
8030 name
= dwarf2_name (child_die
, cu
);
8033 sym
= new_symbol (child_die
, this_type
, cu
);
8034 if (SYMBOL_VALUE (sym
) < 0)
8039 else if ((mask
& SYMBOL_VALUE (sym
)) != 0)
8042 mask
|= SYMBOL_VALUE (sym
);
8044 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
8046 fields
= (struct field
*)
8048 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
8049 * sizeof (struct field
));
8052 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
8053 FIELD_TYPE (fields
[num_fields
]) = NULL
;
8054 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
8055 FIELD_BITSIZE (fields
[num_fields
]) = 0;
8061 child_die
= sibling_die (child_die
);
8066 TYPE_NFIELDS (this_type
) = num_fields
;
8067 TYPE_FIELDS (this_type
) = (struct field
*)
8068 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
8069 memcpy (TYPE_FIELDS (this_type
), fields
,
8070 sizeof (struct field
) * num_fields
);
8074 TYPE_UNSIGNED (this_type
) = 1;
8076 TYPE_FLAG_ENUM (this_type
) = 1;
8079 /* If we are reading an enum from a .debug_types unit, and the enum
8080 is a declaration, and the enum is not the signatured type in the
8081 unit, then we do not want to add a symbol for it. Adding a
8082 symbol would in some cases obscure the true definition of the
8083 enum, giving users an incomplete type when the definition is
8084 actually available. Note that we do not want to do this for all
8085 enums which are just declarations, because C++0x allows forward
8086 enum declarations. */
8087 if (cu
->per_cu
->debug_types_section
8088 && die_is_declaration (die
, cu
))
8090 struct signatured_type
*sig_type
;
8093 = lookup_signatured_type_at_offset (dwarf2_per_objfile
->objfile
,
8094 cu
->per_cu
->debug_types_section
,
8095 cu
->per_cu
->offset
);
8096 if (sig_type
->per_cu
.offset
.sect_off
+ sig_type
->type_offset
.cu_off
8097 != die
->offset
.sect_off
)
8101 new_symbol (die
, this_type
, cu
);
8104 /* Extract all information from a DW_TAG_array_type DIE and put it in
8105 the DIE's type field. For now, this only handles one dimensional
8108 static struct type
*
8109 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8111 struct objfile
*objfile
= cu
->objfile
;
8112 struct die_info
*child_die
;
8114 struct type
*element_type
, *range_type
, *index_type
;
8115 struct type
**range_types
= NULL
;
8116 struct attribute
*attr
;
8118 struct cleanup
*back_to
;
8121 element_type
= die_type (die
, cu
);
8123 /* The die_type call above may have already set the type for this DIE. */
8124 type
= get_die_type (die
, cu
);
8128 /* Irix 6.2 native cc creates array types without children for
8129 arrays with unspecified length. */
8130 if (die
->child
== NULL
)
8132 index_type
= objfile_type (objfile
)->builtin_int
;
8133 range_type
= create_range_type (NULL
, index_type
, 0, -1);
8134 type
= create_array_type (NULL
, element_type
, range_type
);
8135 return set_die_type (die
, type
, cu
);
8138 back_to
= make_cleanup (null_cleanup
, NULL
);
8139 child_die
= die
->child
;
8140 while (child_die
&& child_die
->tag
)
8142 if (child_die
->tag
== DW_TAG_subrange_type
)
8144 struct type
*child_type
= read_type_die (child_die
, cu
);
8146 if (child_type
!= NULL
)
8148 /* The range type was succesfully read. Save it for the
8149 array type creation. */
8150 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
8152 range_types
= (struct type
**)
8153 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
8154 * sizeof (struct type
*));
8156 make_cleanup (free_current_contents
, &range_types
);
8158 range_types
[ndim
++] = child_type
;
8161 child_die
= sibling_die (child_die
);
8164 /* Dwarf2 dimensions are output from left to right, create the
8165 necessary array types in backwards order. */
8167 type
= element_type
;
8169 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
8174 type
= create_array_type (NULL
, type
, range_types
[i
++]);
8179 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
8182 /* Understand Dwarf2 support for vector types (like they occur on
8183 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
8184 array type. This is not part of the Dwarf2/3 standard yet, but a
8185 custom vendor extension. The main difference between a regular
8186 array and the vector variant is that vectors are passed by value
8188 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
8190 make_vector_type (type
);
8192 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
8193 implementation may choose to implement triple vectors using this
8195 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8198 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
8199 TYPE_LENGTH (type
) = DW_UNSND (attr
);
8201 complaint (&symfile_complaints
,
8202 _("DW_AT_byte_size for array type smaller "
8203 "than the total size of elements"));
8206 name
= dwarf2_name (die
, cu
);
8208 TYPE_NAME (type
) = name
;
8210 /* Install the type in the die. */
8211 set_die_type (die
, type
, cu
);
8213 /* set_die_type should be already done. */
8214 set_descriptive_type (type
, die
, cu
);
8216 do_cleanups (back_to
);
8221 static enum dwarf_array_dim_ordering
8222 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
8224 struct attribute
*attr
;
8226 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
8228 if (attr
) return DW_SND (attr
);
8230 /* GNU F77 is a special case, as at 08/2004 array type info is the
8231 opposite order to the dwarf2 specification, but data is still
8232 laid out as per normal fortran.
8234 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
8235 version checking. */
8237 if (cu
->language
== language_fortran
8238 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
8240 return DW_ORD_row_major
;
8243 switch (cu
->language_defn
->la_array_ordering
)
8245 case array_column_major
:
8246 return DW_ORD_col_major
;
8247 case array_row_major
:
8249 return DW_ORD_row_major
;
8253 /* Extract all information from a DW_TAG_set_type DIE and put it in
8254 the DIE's type field. */
8256 static struct type
*
8257 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8259 struct type
*domain_type
, *set_type
;
8260 struct attribute
*attr
;
8262 domain_type
= die_type (die
, cu
);
8264 /* The die_type call above may have already set the type for this DIE. */
8265 set_type
= get_die_type (die
, cu
);
8269 set_type
= create_set_type (NULL
, domain_type
);
8271 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8273 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
8275 return set_die_type (die
, set_type
, cu
);
8278 /* First cut: install each common block member as a global variable. */
8281 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
8283 struct die_info
*child_die
;
8284 struct attribute
*attr
;
8286 CORE_ADDR base
= (CORE_ADDR
) 0;
8288 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8291 /* Support the .debug_loc offsets. */
8292 if (attr_form_is_block (attr
))
8294 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
8296 else if (attr_form_is_section_offset (attr
))
8298 dwarf2_complex_location_expr_complaint ();
8302 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
8303 "common block member");
8306 if (die
->child
!= NULL
)
8308 child_die
= die
->child
;
8309 while (child_die
&& child_die
->tag
)
8313 sym
= new_symbol (child_die
, NULL
, cu
);
8315 && handle_data_member_location (child_die
, cu
, &offset
))
8317 SYMBOL_VALUE_ADDRESS (sym
) = base
+ offset
;
8318 add_symbol_to_list (sym
, &global_symbols
);
8320 child_die
= sibling_die (child_die
);
8325 /* Create a type for a C++ namespace. */
8327 static struct type
*
8328 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8330 struct objfile
*objfile
= cu
->objfile
;
8331 const char *previous_prefix
, *name
;
8335 /* For extensions, reuse the type of the original namespace. */
8336 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
8338 struct die_info
*ext_die
;
8339 struct dwarf2_cu
*ext_cu
= cu
;
8341 ext_die
= dwarf2_extension (die
, &ext_cu
);
8342 type
= read_type_die (ext_die
, ext_cu
);
8344 /* EXT_CU may not be the same as CU.
8345 Ensure TYPE is recorded in CU's type_hash table. */
8346 return set_die_type (die
, type
, cu
);
8349 name
= namespace_name (die
, &is_anonymous
, cu
);
8351 /* Now build the name of the current namespace. */
8353 previous_prefix
= determine_prefix (die
, cu
);
8354 if (previous_prefix
[0] != '\0')
8355 name
= typename_concat (&objfile
->objfile_obstack
,
8356 previous_prefix
, name
, 0, cu
);
8358 /* Create the type. */
8359 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
8361 TYPE_NAME (type
) = (char *) name
;
8362 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
8364 return set_die_type (die
, type
, cu
);
8367 /* Read a C++ namespace. */
8370 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8372 struct objfile
*objfile
= cu
->objfile
;
8375 /* Add a symbol associated to this if we haven't seen the namespace
8376 before. Also, add a using directive if it's an anonymous
8379 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
8383 type
= read_type_die (die
, cu
);
8384 new_symbol (die
, type
, cu
);
8386 namespace_name (die
, &is_anonymous
, cu
);
8389 const char *previous_prefix
= determine_prefix (die
, cu
);
8391 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
8392 NULL
, NULL
, &objfile
->objfile_obstack
);
8396 if (die
->child
!= NULL
)
8398 struct die_info
*child_die
= die
->child
;
8400 while (child_die
&& child_die
->tag
)
8402 process_die (child_die
, cu
);
8403 child_die
= sibling_die (child_die
);
8408 /* Read a Fortran module as type. This DIE can be only a declaration used for
8409 imported module. Still we need that type as local Fortran "use ... only"
8410 declaration imports depend on the created type in determine_prefix. */
8412 static struct type
*
8413 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8415 struct objfile
*objfile
= cu
->objfile
;
8419 module_name
= dwarf2_name (die
, cu
);
8421 complaint (&symfile_complaints
,
8422 _("DW_TAG_module has no name, offset 0x%x"),
8423 die
->offset
.sect_off
);
8424 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
8426 /* determine_prefix uses TYPE_TAG_NAME. */
8427 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
8429 return set_die_type (die
, type
, cu
);
8432 /* Read a Fortran module. */
8435 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
8437 struct die_info
*child_die
= die
->child
;
8439 while (child_die
&& child_die
->tag
)
8441 process_die (child_die
, cu
);
8442 child_die
= sibling_die (child_die
);
8446 /* Return the name of the namespace represented by DIE. Set
8447 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
8451 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
8453 struct die_info
*current_die
;
8454 const char *name
= NULL
;
8456 /* Loop through the extensions until we find a name. */
8458 for (current_die
= die
;
8459 current_die
!= NULL
;
8460 current_die
= dwarf2_extension (die
, &cu
))
8462 name
= dwarf2_name (current_die
, cu
);
8467 /* Is it an anonymous namespace? */
8469 *is_anonymous
= (name
== NULL
);
8471 name
= CP_ANONYMOUS_NAMESPACE_STR
;
8476 /* Extract all information from a DW_TAG_pointer_type DIE and add to
8477 the user defined type vector. */
8479 static struct type
*
8480 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8482 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
8483 struct comp_unit_head
*cu_header
= &cu
->header
;
8485 struct attribute
*attr_byte_size
;
8486 struct attribute
*attr_address_class
;
8487 int byte_size
, addr_class
;
8488 struct type
*target_type
;
8490 target_type
= die_type (die
, cu
);
8492 /* The die_type call above may have already set the type for this DIE. */
8493 type
= get_die_type (die
, cu
);
8497 type
= lookup_pointer_type (target_type
);
8499 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8501 byte_size
= DW_UNSND (attr_byte_size
);
8503 byte_size
= cu_header
->addr_size
;
8505 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
8506 if (attr_address_class
)
8507 addr_class
= DW_UNSND (attr_address_class
);
8509 addr_class
= DW_ADDR_none
;
8511 /* If the pointer size or address class is different than the
8512 default, create a type variant marked as such and set the
8513 length accordingly. */
8514 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
8516 if (gdbarch_address_class_type_flags_p (gdbarch
))
8520 type_flags
= gdbarch_address_class_type_flags
8521 (gdbarch
, byte_size
, addr_class
);
8522 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
8524 type
= make_type_with_address_space (type
, type_flags
);
8526 else if (TYPE_LENGTH (type
) != byte_size
)
8528 complaint (&symfile_complaints
,
8529 _("invalid pointer size %d"), byte_size
);
8533 /* Should we also complain about unhandled address classes? */
8537 TYPE_LENGTH (type
) = byte_size
;
8538 return set_die_type (die
, type
, cu
);
8541 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
8542 the user defined type vector. */
8544 static struct type
*
8545 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8548 struct type
*to_type
;
8549 struct type
*domain
;
8551 to_type
= die_type (die
, cu
);
8552 domain
= die_containing_type (die
, cu
);
8554 /* The calls above may have already set the type for this DIE. */
8555 type
= get_die_type (die
, cu
);
8559 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
8560 type
= lookup_methodptr_type (to_type
);
8562 type
= lookup_memberptr_type (to_type
, domain
);
8564 return set_die_type (die
, type
, cu
);
8567 /* Extract all information from a DW_TAG_reference_type DIE and add to
8568 the user defined type vector. */
8570 static struct type
*
8571 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8573 struct comp_unit_head
*cu_header
= &cu
->header
;
8574 struct type
*type
, *target_type
;
8575 struct attribute
*attr
;
8577 target_type
= die_type (die
, cu
);
8579 /* The die_type call above may have already set the type for this DIE. */
8580 type
= get_die_type (die
, cu
);
8584 type
= lookup_reference_type (target_type
);
8585 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8588 TYPE_LENGTH (type
) = DW_UNSND (attr
);
8592 TYPE_LENGTH (type
) = cu_header
->addr_size
;
8594 return set_die_type (die
, type
, cu
);
8597 static struct type
*
8598 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8600 struct type
*base_type
, *cv_type
;
8602 base_type
= die_type (die
, cu
);
8604 /* The die_type call above may have already set the type for this DIE. */
8605 cv_type
= get_die_type (die
, cu
);
8609 /* In case the const qualifier is applied to an array type, the element type
8610 is so qualified, not the array type (section 6.7.3 of C99). */
8611 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
8613 struct type
*el_type
, *inner_array
;
8615 base_type
= copy_type (base_type
);
8616 inner_array
= base_type
;
8618 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
8620 TYPE_TARGET_TYPE (inner_array
) =
8621 copy_type (TYPE_TARGET_TYPE (inner_array
));
8622 inner_array
= TYPE_TARGET_TYPE (inner_array
);
8625 el_type
= TYPE_TARGET_TYPE (inner_array
);
8626 TYPE_TARGET_TYPE (inner_array
) =
8627 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
8629 return set_die_type (die
, base_type
, cu
);
8632 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
8633 return set_die_type (die
, cv_type
, cu
);
8636 static struct type
*
8637 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8639 struct type
*base_type
, *cv_type
;
8641 base_type
= die_type (die
, cu
);
8643 /* The die_type call above may have already set the type for this DIE. */
8644 cv_type
= get_die_type (die
, cu
);
8648 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
8649 return set_die_type (die
, cv_type
, cu
);
8652 /* Extract all information from a DW_TAG_string_type DIE and add to
8653 the user defined type vector. It isn't really a user defined type,
8654 but it behaves like one, with other DIE's using an AT_user_def_type
8655 attribute to reference it. */
8657 static struct type
*
8658 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8660 struct objfile
*objfile
= cu
->objfile
;
8661 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8662 struct type
*type
, *range_type
, *index_type
, *char_type
;
8663 struct attribute
*attr
;
8664 unsigned int length
;
8666 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
8669 length
= DW_UNSND (attr
);
8673 /* Check for the DW_AT_byte_size attribute. */
8674 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8677 length
= DW_UNSND (attr
);
8685 index_type
= objfile_type (objfile
)->builtin_int
;
8686 range_type
= create_range_type (NULL
, index_type
, 1, length
);
8687 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
8688 type
= create_string_type (NULL
, char_type
, range_type
);
8690 return set_die_type (die
, type
, cu
);
8693 /* Handle DIES due to C code like:
8697 int (*funcp)(int a, long l);
8701 ('funcp' generates a DW_TAG_subroutine_type DIE). */
8703 static struct type
*
8704 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8706 struct objfile
*objfile
= cu
->objfile
;
8707 struct type
*type
; /* Type that this function returns. */
8708 struct type
*ftype
; /* Function that returns above type. */
8709 struct attribute
*attr
;
8711 type
= die_type (die
, cu
);
8713 /* The die_type call above may have already set the type for this DIE. */
8714 ftype
= get_die_type (die
, cu
);
8718 ftype
= lookup_function_type (type
);
8720 /* All functions in C++, Pascal and Java have prototypes. */
8721 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
8722 if ((attr
&& (DW_UNSND (attr
) != 0))
8723 || cu
->language
== language_cplus
8724 || cu
->language
== language_java
8725 || cu
->language
== language_pascal
)
8726 TYPE_PROTOTYPED (ftype
) = 1;
8727 else if (producer_is_realview (cu
->producer
))
8728 /* RealView does not emit DW_AT_prototyped. We can not
8729 distinguish prototyped and unprototyped functions; default to
8730 prototyped, since that is more common in modern code (and
8731 RealView warns about unprototyped functions). */
8732 TYPE_PROTOTYPED (ftype
) = 1;
8734 /* Store the calling convention in the type if it's available in
8735 the subroutine die. Otherwise set the calling convention to
8736 the default value DW_CC_normal. */
8737 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
8739 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
8740 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
8741 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
8743 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
8745 /* We need to add the subroutine type to the die immediately so
8746 we don't infinitely recurse when dealing with parameters
8747 declared as the same subroutine type. */
8748 set_die_type (die
, ftype
, cu
);
8750 if (die
->child
!= NULL
)
8752 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
8753 struct die_info
*child_die
;
8754 int nparams
, iparams
;
8756 /* Count the number of parameters.
8757 FIXME: GDB currently ignores vararg functions, but knows about
8758 vararg member functions. */
8760 child_die
= die
->child
;
8761 while (child_die
&& child_die
->tag
)
8763 if (child_die
->tag
== DW_TAG_formal_parameter
)
8765 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
8766 TYPE_VARARGS (ftype
) = 1;
8767 child_die
= sibling_die (child_die
);
8770 /* Allocate storage for parameters and fill them in. */
8771 TYPE_NFIELDS (ftype
) = nparams
;
8772 TYPE_FIELDS (ftype
) = (struct field
*)
8773 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
8775 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
8776 even if we error out during the parameters reading below. */
8777 for (iparams
= 0; iparams
< nparams
; iparams
++)
8778 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
8781 child_die
= die
->child
;
8782 while (child_die
&& child_die
->tag
)
8784 if (child_die
->tag
== DW_TAG_formal_parameter
)
8786 struct type
*arg_type
;
8788 /* DWARF version 2 has no clean way to discern C++
8789 static and non-static member functions. G++ helps
8790 GDB by marking the first parameter for non-static
8791 member functions (which is the this pointer) as
8792 artificial. We pass this information to
8793 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
8795 DWARF version 3 added DW_AT_object_pointer, which GCC
8796 4.5 does not yet generate. */
8797 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
8799 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
8802 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
8804 /* GCC/43521: In java, the formal parameter
8805 "this" is sometimes not marked with DW_AT_artificial. */
8806 if (cu
->language
== language_java
)
8808 const char *name
= dwarf2_name (child_die
, cu
);
8810 if (name
&& !strcmp (name
, "this"))
8811 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
8814 arg_type
= die_type (child_die
, cu
);
8816 /* RealView does not mark THIS as const, which the testsuite
8817 expects. GCC marks THIS as const in method definitions,
8818 but not in the class specifications (GCC PR 43053). */
8819 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
8820 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
8823 struct dwarf2_cu
*arg_cu
= cu
;
8824 const char *name
= dwarf2_name (child_die
, cu
);
8826 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
8829 /* If the compiler emits this, use it. */
8830 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
8833 else if (name
&& strcmp (name
, "this") == 0)
8834 /* Function definitions will have the argument names. */
8836 else if (name
== NULL
&& iparams
== 0)
8837 /* Declarations may not have the names, so like
8838 elsewhere in GDB, assume an artificial first
8839 argument is "this". */
8843 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
8847 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
8850 child_die
= sibling_die (child_die
);
8857 static struct type
*
8858 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
8860 struct objfile
*objfile
= cu
->objfile
;
8861 const char *name
= NULL
;
8862 struct type
*this_type
, *target_type
;
8864 name
= dwarf2_full_name (NULL
, die
, cu
);
8865 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
8866 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
8867 TYPE_NAME (this_type
) = (char *) name
;
8868 set_die_type (die
, this_type
, cu
);
8869 target_type
= die_type (die
, cu
);
8870 if (target_type
!= this_type
)
8871 TYPE_TARGET_TYPE (this_type
) = target_type
;
8874 /* Self-referential typedefs are, it seems, not allowed by the DWARF
8875 spec and cause infinite loops in GDB. */
8876 complaint (&symfile_complaints
,
8877 _("Self-referential DW_TAG_typedef "
8878 "- DIE at 0x%x [in module %s]"),
8879 die
->offset
.sect_off
, objfile
->name
);
8880 TYPE_TARGET_TYPE (this_type
) = NULL
;
8885 /* Find a representation of a given base type and install
8886 it in the TYPE field of the die. */
8888 static struct type
*
8889 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8891 struct objfile
*objfile
= cu
->objfile
;
8893 struct attribute
*attr
;
8894 int encoding
= 0, size
= 0;
8896 enum type_code code
= TYPE_CODE_INT
;
8898 struct type
*target_type
= NULL
;
8900 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
8903 encoding
= DW_UNSND (attr
);
8905 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8908 size
= DW_UNSND (attr
);
8910 name
= dwarf2_name (die
, cu
);
8913 complaint (&symfile_complaints
,
8914 _("DW_AT_name missing from DW_TAG_base_type"));
8919 case DW_ATE_address
:
8920 /* Turn DW_ATE_address into a void * pointer. */
8921 code
= TYPE_CODE_PTR
;
8922 type_flags
|= TYPE_FLAG_UNSIGNED
;
8923 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
8925 case DW_ATE_boolean
:
8926 code
= TYPE_CODE_BOOL
;
8927 type_flags
|= TYPE_FLAG_UNSIGNED
;
8929 case DW_ATE_complex_float
:
8930 code
= TYPE_CODE_COMPLEX
;
8931 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
8933 case DW_ATE_decimal_float
:
8934 code
= TYPE_CODE_DECFLOAT
;
8937 code
= TYPE_CODE_FLT
;
8941 case DW_ATE_unsigned
:
8942 type_flags
|= TYPE_FLAG_UNSIGNED
;
8943 if (cu
->language
== language_fortran
8945 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
8946 code
= TYPE_CODE_CHAR
;
8948 case DW_ATE_signed_char
:
8949 if (cu
->language
== language_ada
|| cu
->language
== language_m2
8950 || cu
->language
== language_pascal
8951 || cu
->language
== language_fortran
)
8952 code
= TYPE_CODE_CHAR
;
8954 case DW_ATE_unsigned_char
:
8955 if (cu
->language
== language_ada
|| cu
->language
== language_m2
8956 || cu
->language
== language_pascal
8957 || cu
->language
== language_fortran
)
8958 code
= TYPE_CODE_CHAR
;
8959 type_flags
|= TYPE_FLAG_UNSIGNED
;
8962 /* We just treat this as an integer and then recognize the
8963 type by name elsewhere. */
8967 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
8968 dwarf_type_encoding_name (encoding
));
8972 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
8973 TYPE_NAME (type
) = name
;
8974 TYPE_TARGET_TYPE (type
) = target_type
;
8976 if (name
&& strcmp (name
, "char") == 0)
8977 TYPE_NOSIGN (type
) = 1;
8979 return set_die_type (die
, type
, cu
);
8982 /* Read the given DW_AT_subrange DIE. */
8984 static struct type
*
8985 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8987 struct type
*base_type
;
8988 struct type
*range_type
;
8989 struct attribute
*attr
;
8993 LONGEST negative_mask
;
8995 base_type
= die_type (die
, cu
);
8996 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
8997 check_typedef (base_type
);
8999 /* The die_type call above may have already set the type for this DIE. */
9000 range_type
= get_die_type (die
, cu
);
9004 if (cu
->language
== language_fortran
)
9006 /* FORTRAN implies a lower bound of 1, if not given. */
9010 /* FIXME: For variable sized arrays either of these could be
9011 a variable rather than a constant value. We'll allow it,
9012 but we don't know how to handle it. */
9013 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
9015 low
= dwarf2_get_attr_constant_value (attr
, 0);
9017 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
9020 if (attr_form_is_block (attr
) || is_ref_attr (attr
))
9022 /* GCC encodes arrays with unspecified or dynamic length
9023 with a DW_FORM_block1 attribute or a reference attribute.
9024 FIXME: GDB does not yet know how to handle dynamic
9025 arrays properly, treat them as arrays with unspecified
9028 FIXME: jimb/2003-09-22: GDB does not really know
9029 how to handle arrays of unspecified length
9030 either; we just represent them as zero-length
9031 arrays. Choose an appropriate upper bound given
9032 the lower bound we've computed above. */
9036 high
= dwarf2_get_attr_constant_value (attr
, 1);
9040 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
9043 int count
= dwarf2_get_attr_constant_value (attr
, 1);
9044 high
= low
+ count
- 1;
9048 /* Unspecified array length. */
9053 /* Dwarf-2 specifications explicitly allows to create subrange types
9054 without specifying a base type.
9055 In that case, the base type must be set to the type of
9056 the lower bound, upper bound or count, in that order, if any of these
9057 three attributes references an object that has a type.
9058 If no base type is found, the Dwarf-2 specifications say that
9059 a signed integer type of size equal to the size of an address should
9061 For the following C code: `extern char gdb_int [];'
9062 GCC produces an empty range DIE.
9063 FIXME: muller/2010-05-28: Possible references to object for low bound,
9064 high bound or count are not yet handled by this code. */
9065 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
9067 struct objfile
*objfile
= cu
->objfile
;
9068 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9069 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
9070 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
9072 /* Test "int", "long int", and "long long int" objfile types,
9073 and select the first one having a size above or equal to the
9074 architecture address size. */
9075 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
9076 base_type
= int_type
;
9079 int_type
= objfile_type (objfile
)->builtin_long
;
9080 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
9081 base_type
= int_type
;
9084 int_type
= objfile_type (objfile
)->builtin_long_long
;
9085 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
9086 base_type
= int_type
;
9092 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
9093 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
9094 low
|= negative_mask
;
9095 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
9096 high
|= negative_mask
;
9098 range_type
= create_range_type (NULL
, base_type
, low
, high
);
9100 /* Mark arrays with dynamic length at least as an array of unspecified
9101 length. GDB could check the boundary but before it gets implemented at
9102 least allow accessing the array elements. */
9103 if (attr
&& attr_form_is_block (attr
))
9104 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
9106 /* Ada expects an empty array on no boundary attributes. */
9107 if (attr
== NULL
&& cu
->language
!= language_ada
)
9108 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
9110 name
= dwarf2_name (die
, cu
);
9112 TYPE_NAME (range_type
) = name
;
9114 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
9116 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
9118 set_die_type (die
, range_type
, cu
);
9120 /* set_die_type should be already done. */
9121 set_descriptive_type (range_type
, die
, cu
);
9126 static struct type
*
9127 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9131 /* For now, we only support the C meaning of an unspecified type: void. */
9133 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
9134 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
9136 return set_die_type (die
, type
, cu
);
9139 /* Trivial hash function for die_info: the hash value of a DIE
9140 is its offset in .debug_info for this objfile. */
9143 die_hash (const void *item
)
9145 const struct die_info
*die
= item
;
9147 return die
->offset
.sect_off
;
9150 /* Trivial comparison function for die_info structures: two DIEs
9151 are equal if they have the same offset. */
9154 die_eq (const void *item_lhs
, const void *item_rhs
)
9156 const struct die_info
*die_lhs
= item_lhs
;
9157 const struct die_info
*die_rhs
= item_rhs
;
9159 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
9162 /* Read a whole compilation unit into a linked list of dies. */
9164 static struct die_info
*
9165 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
9167 struct die_reader_specs reader_specs
;
9168 int read_abbrevs
= 0;
9169 struct cleanup
*back_to
= NULL
;
9170 struct die_info
*die
;
9172 if (cu
->dwarf2_abbrevs
== NULL
)
9174 dwarf2_read_abbrevs (cu
);
9175 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
9179 gdb_assert (cu
->die_hash
== NULL
);
9181 = htab_create_alloc_ex (cu
->header
.length
/ 12,
9185 &cu
->comp_unit_obstack
,
9186 hashtab_obstack_allocate
,
9187 dummy_obstack_deallocate
);
9189 init_cu_die_reader (&reader_specs
, cu
);
9191 die
= read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
9194 do_cleanups (back_to
);
9199 /* Main entry point for reading a DIE and all children.
9200 Read the DIE and dump it if requested. */
9202 static struct die_info
*
9203 read_die_and_children (const struct die_reader_specs
*reader
,
9205 gdb_byte
**new_info_ptr
,
9206 struct die_info
*parent
)
9208 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
9209 new_info_ptr
, parent
);
9211 if (dwarf2_die_debug
)
9213 fprintf_unfiltered (gdb_stdlog
,
9214 "\nRead die from %s of %s:\n",
9215 (reader
->cu
->per_cu
->debug_types_section
9218 reader
->abfd
->filename
);
9219 dump_die (result
, dwarf2_die_debug
);
9225 /* Read a single die and all its descendents. Set the die's sibling
9226 field to NULL; set other fields in the die correctly, and set all
9227 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
9228 location of the info_ptr after reading all of those dies. PARENT
9229 is the parent of the die in question. */
9231 static struct die_info
*
9232 read_die_and_children_1 (const struct die_reader_specs
*reader
,
9234 gdb_byte
**new_info_ptr
,
9235 struct die_info
*parent
)
9237 struct die_info
*die
;
9241 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
9244 *new_info_ptr
= cur_ptr
;
9247 store_in_ref_table (die
, reader
->cu
);
9250 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
9254 *new_info_ptr
= cur_ptr
;
9257 die
->sibling
= NULL
;
9258 die
->parent
= parent
;
9262 /* Read a die, all of its descendents, and all of its siblings; set
9263 all of the fields of all of the dies correctly. Arguments are as
9264 in read_die_and_children. */
9266 static struct die_info
*
9267 read_die_and_siblings (const struct die_reader_specs
*reader
,
9269 gdb_byte
**new_info_ptr
,
9270 struct die_info
*parent
)
9272 struct die_info
*first_die
, *last_sibling
;
9276 first_die
= last_sibling
= NULL
;
9280 struct die_info
*die
9281 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
9285 *new_info_ptr
= cur_ptr
;
9292 last_sibling
->sibling
= die
;
9298 /* Read the die from the .debug_info section buffer. Set DIEP to
9299 point to a newly allocated die with its information, except for its
9300 child, sibling, and parent fields. Set HAS_CHILDREN to tell
9301 whether the die has children or not. */
9304 read_full_die (const struct die_reader_specs
*reader
,
9305 struct die_info
**diep
, gdb_byte
*info_ptr
,
9308 unsigned int abbrev_number
, bytes_read
, i
;
9310 struct abbrev_info
*abbrev
;
9311 struct die_info
*die
;
9312 struct dwarf2_cu
*cu
= reader
->cu
;
9313 bfd
*abfd
= reader
->abfd
;
9315 offset
.sect_off
= info_ptr
- reader
->buffer
;
9316 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9317 info_ptr
+= bytes_read
;
9325 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
9327 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
9329 bfd_get_filename (abfd
));
9331 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
9332 die
->offset
= offset
;
9333 die
->tag
= abbrev
->tag
;
9334 die
->abbrev
= abbrev_number
;
9336 die
->num_attrs
= abbrev
->num_attrs
;
9338 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
9339 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
9340 abfd
, info_ptr
, cu
);
9343 *has_children
= abbrev
->has_children
;
9347 /* In DWARF version 2, the description of the debugging information is
9348 stored in a separate .debug_abbrev section. Before we read any
9349 dies from a section we read in all abbreviations and install them
9350 in a hash table. This function also sets flags in CU describing
9351 the data found in the abbrev table. */
9354 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
)
9356 bfd
*abfd
= cu
->objfile
->obfd
;
9357 struct comp_unit_head
*cu_header
= &cu
->header
;
9358 gdb_byte
*abbrev_ptr
;
9359 struct abbrev_info
*cur_abbrev
;
9360 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
9361 unsigned int abbrev_form
, hash_number
;
9362 struct attr_abbrev
*cur_attrs
;
9363 unsigned int allocated_attrs
;
9365 /* Initialize dwarf2 abbrevs. */
9366 obstack_init (&cu
->abbrev_obstack
);
9367 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
9369 * sizeof (struct abbrev_info
*)));
9370 memset (cu
->dwarf2_abbrevs
, 0,
9371 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
9373 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
9374 &dwarf2_per_objfile
->abbrev
);
9375 abbrev_ptr
= (dwarf2_per_objfile
->abbrev
.buffer
9376 + cu_header
->abbrev_offset
.sect_off
);
9377 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9378 abbrev_ptr
+= bytes_read
;
9380 allocated_attrs
= ATTR_ALLOC_CHUNK
;
9381 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
9383 /* Loop until we reach an abbrev number of 0. */
9384 while (abbrev_number
)
9386 cur_abbrev
= dwarf_alloc_abbrev (cu
);
9388 /* read in abbrev header */
9389 cur_abbrev
->number
= abbrev_number
;
9390 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9391 abbrev_ptr
+= bytes_read
;
9392 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
9395 /* now read in declarations */
9396 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9397 abbrev_ptr
+= bytes_read
;
9398 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9399 abbrev_ptr
+= bytes_read
;
9402 if (cur_abbrev
->num_attrs
== allocated_attrs
)
9404 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
9406 = xrealloc (cur_attrs
, (allocated_attrs
9407 * sizeof (struct attr_abbrev
)));
9410 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
9411 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
9412 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9413 abbrev_ptr
+= bytes_read
;
9414 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9415 abbrev_ptr
+= bytes_read
;
9418 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
9419 (cur_abbrev
->num_attrs
9420 * sizeof (struct attr_abbrev
)));
9421 memcpy (cur_abbrev
->attrs
, cur_attrs
,
9422 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
9424 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
9425 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
9426 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
9428 /* Get next abbreviation.
9429 Under Irix6 the abbreviations for a compilation unit are not
9430 always properly terminated with an abbrev number of 0.
9431 Exit loop if we encounter an abbreviation which we have
9432 already read (which means we are about to read the abbreviations
9433 for the next compile unit) or if the end of the abbreviation
9434 table is reached. */
9435 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
9436 >= dwarf2_per_objfile
->abbrev
.size
)
9438 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9439 abbrev_ptr
+= bytes_read
;
9440 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
9447 /* Release the memory used by the abbrev table for a compilation unit. */
9450 dwarf2_free_abbrev_table (void *ptr_to_cu
)
9452 struct dwarf2_cu
*cu
= ptr_to_cu
;
9454 obstack_free (&cu
->abbrev_obstack
, NULL
);
9455 cu
->dwarf2_abbrevs
= NULL
;
9458 /* Lookup an abbrev_info structure in the abbrev hash table. */
9460 static struct abbrev_info
*
9461 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
9463 unsigned int hash_number
;
9464 struct abbrev_info
*abbrev
;
9466 hash_number
= number
% ABBREV_HASH_SIZE
;
9467 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
9471 if (abbrev
->number
== number
)
9474 abbrev
= abbrev
->next
;
9479 /* Returns nonzero if TAG represents a type that we might generate a partial
9483 is_type_tag_for_partial (int tag
)
9488 /* Some types that would be reasonable to generate partial symbols for,
9489 that we don't at present. */
9490 case DW_TAG_array_type
:
9491 case DW_TAG_file_type
:
9492 case DW_TAG_ptr_to_member_type
:
9493 case DW_TAG_set_type
:
9494 case DW_TAG_string_type
:
9495 case DW_TAG_subroutine_type
:
9497 case DW_TAG_base_type
:
9498 case DW_TAG_class_type
:
9499 case DW_TAG_interface_type
:
9500 case DW_TAG_enumeration_type
:
9501 case DW_TAG_structure_type
:
9502 case DW_TAG_subrange_type
:
9503 case DW_TAG_typedef
:
9504 case DW_TAG_union_type
:
9511 /* Load all DIEs that are interesting for partial symbols into memory. */
9513 static struct partial_die_info
*
9514 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
9515 int building_psymtab
, struct dwarf2_cu
*cu
)
9517 struct objfile
*objfile
= cu
->objfile
;
9518 struct partial_die_info
*part_die
;
9519 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
9520 struct abbrev_info
*abbrev
;
9521 unsigned int bytes_read
;
9522 unsigned int load_all
= 0;
9523 int nesting_level
= 1;
9528 gdb_assert (cu
->per_cu
!= NULL
);
9529 if (cu
->per_cu
->load_all_dies
)
9533 = htab_create_alloc_ex (cu
->header
.length
/ 12,
9537 &cu
->comp_unit_obstack
,
9538 hashtab_obstack_allocate
,
9539 dummy_obstack_deallocate
);
9541 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
9542 sizeof (struct partial_die_info
));
9546 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
9548 /* A NULL abbrev means the end of a series of children. */
9551 if (--nesting_level
== 0)
9553 /* PART_DIE was probably the last thing allocated on the
9554 comp_unit_obstack, so we could call obstack_free
9555 here. We don't do that because the waste is small,
9556 and will be cleaned up when we're done with this
9557 compilation unit. This way, we're also more robust
9558 against other users of the comp_unit_obstack. */
9561 info_ptr
+= bytes_read
;
9562 last_die
= parent_die
;
9563 parent_die
= parent_die
->die_parent
;
9567 /* Check for template arguments. We never save these; if
9568 they're seen, we just mark the parent, and go on our way. */
9569 if (parent_die
!= NULL
9570 && cu
->language
== language_cplus
9571 && (abbrev
->tag
== DW_TAG_template_type_param
9572 || abbrev
->tag
== DW_TAG_template_value_param
))
9574 parent_die
->has_template_arguments
= 1;
9578 /* We don't need a partial DIE for the template argument. */
9579 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
,
9585 /* We only recurse into c++ subprograms looking for template arguments.
9586 Skip their other children. */
9588 && cu
->language
== language_cplus
9589 && parent_die
!= NULL
9590 && parent_die
->tag
== DW_TAG_subprogram
)
9592 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
9596 /* Check whether this DIE is interesting enough to save. Normally
9597 we would not be interested in members here, but there may be
9598 later variables referencing them via DW_AT_specification (for
9601 && !is_type_tag_for_partial (abbrev
->tag
)
9602 && abbrev
->tag
!= DW_TAG_constant
9603 && abbrev
->tag
!= DW_TAG_enumerator
9604 && abbrev
->tag
!= DW_TAG_subprogram
9605 && abbrev
->tag
!= DW_TAG_lexical_block
9606 && abbrev
->tag
!= DW_TAG_variable
9607 && abbrev
->tag
!= DW_TAG_namespace
9608 && abbrev
->tag
!= DW_TAG_module
9609 && abbrev
->tag
!= DW_TAG_member
)
9611 /* Otherwise we skip to the next sibling, if any. */
9612 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
9616 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
9617 buffer
, info_ptr
, cu
);
9619 /* This two-pass algorithm for processing partial symbols has a
9620 high cost in cache pressure. Thus, handle some simple cases
9621 here which cover the majority of C partial symbols. DIEs
9622 which neither have specification tags in them, nor could have
9623 specification tags elsewhere pointing at them, can simply be
9624 processed and discarded.
9626 This segment is also optional; scan_partial_symbols and
9627 add_partial_symbol will handle these DIEs if we chain
9628 them in normally. When compilers which do not emit large
9629 quantities of duplicate debug information are more common,
9630 this code can probably be removed. */
9632 /* Any complete simple types at the top level (pretty much all
9633 of them, for a language without namespaces), can be processed
9635 if (parent_die
== NULL
9636 && part_die
->has_specification
== 0
9637 && part_die
->is_declaration
== 0
9638 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
9639 || part_die
->tag
== DW_TAG_base_type
9640 || part_die
->tag
== DW_TAG_subrange_type
))
9642 if (building_psymtab
&& part_die
->name
!= NULL
)
9643 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
9644 VAR_DOMAIN
, LOC_TYPEDEF
,
9645 &objfile
->static_psymbols
,
9646 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
9647 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
9651 /* The exception for DW_TAG_typedef with has_children above is
9652 a workaround of GCC PR debug/47510. In the case of this complaint
9653 type_name_no_tag_or_error will error on such types later.
9655 GDB skipped children of DW_TAG_typedef by the shortcut above and then
9656 it could not find the child DIEs referenced later, this is checked
9657 above. In correct DWARF DW_TAG_typedef should have no children. */
9659 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
9660 complaint (&symfile_complaints
,
9661 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
9662 "- DIE at 0x%x [in module %s]"),
9663 part_die
->offset
.sect_off
, objfile
->name
);
9665 /* If we're at the second level, and we're an enumerator, and
9666 our parent has no specification (meaning possibly lives in a
9667 namespace elsewhere), then we can add the partial symbol now
9668 instead of queueing it. */
9669 if (part_die
->tag
== DW_TAG_enumerator
9670 && parent_die
!= NULL
9671 && parent_die
->die_parent
== NULL
9672 && parent_die
->tag
== DW_TAG_enumeration_type
9673 && parent_die
->has_specification
== 0)
9675 if (part_die
->name
== NULL
)
9676 complaint (&symfile_complaints
,
9677 _("malformed enumerator DIE ignored"));
9678 else if (building_psymtab
)
9679 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
9680 VAR_DOMAIN
, LOC_CONST
,
9681 (cu
->language
== language_cplus
9682 || cu
->language
== language_java
)
9683 ? &objfile
->global_psymbols
9684 : &objfile
->static_psymbols
,
9685 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
9687 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
9691 /* We'll save this DIE so link it in. */
9692 part_die
->die_parent
= parent_die
;
9693 part_die
->die_sibling
= NULL
;
9694 part_die
->die_child
= NULL
;
9696 if (last_die
&& last_die
== parent_die
)
9697 last_die
->die_child
= part_die
;
9699 last_die
->die_sibling
= part_die
;
9701 last_die
= part_die
;
9703 if (first_die
== NULL
)
9704 first_die
= part_die
;
9706 /* Maybe add the DIE to the hash table. Not all DIEs that we
9707 find interesting need to be in the hash table, because we
9708 also have the parent/sibling/child chains; only those that we
9709 might refer to by offset later during partial symbol reading.
9711 For now this means things that might have be the target of a
9712 DW_AT_specification, DW_AT_abstract_origin, or
9713 DW_AT_extension. DW_AT_extension will refer only to
9714 namespaces; DW_AT_abstract_origin refers to functions (and
9715 many things under the function DIE, but we do not recurse
9716 into function DIEs during partial symbol reading) and
9717 possibly variables as well; DW_AT_specification refers to
9718 declarations. Declarations ought to have the DW_AT_declaration
9719 flag. It happens that GCC forgets to put it in sometimes, but
9720 only for functions, not for types.
9722 Adding more things than necessary to the hash table is harmless
9723 except for the performance cost. Adding too few will result in
9724 wasted time in find_partial_die, when we reread the compilation
9725 unit with load_all_dies set. */
9728 || abbrev
->tag
== DW_TAG_constant
9729 || abbrev
->tag
== DW_TAG_subprogram
9730 || abbrev
->tag
== DW_TAG_variable
9731 || abbrev
->tag
== DW_TAG_namespace
9732 || part_die
->is_declaration
)
9736 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
9737 part_die
->offset
.sect_off
, INSERT
);
9741 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
9742 sizeof (struct partial_die_info
));
9744 /* For some DIEs we want to follow their children (if any). For C
9745 we have no reason to follow the children of structures; for other
9746 languages we have to, so that we can get at method physnames
9747 to infer fully qualified class names, for DW_AT_specification,
9748 and for C++ template arguments. For C++, we also look one level
9749 inside functions to find template arguments (if the name of the
9750 function does not already contain the template arguments).
9752 For Ada, we need to scan the children of subprograms and lexical
9753 blocks as well because Ada allows the definition of nested
9754 entities that could be interesting for the debugger, such as
9755 nested subprograms for instance. */
9756 if (last_die
->has_children
9758 || last_die
->tag
== DW_TAG_namespace
9759 || last_die
->tag
== DW_TAG_module
9760 || last_die
->tag
== DW_TAG_enumeration_type
9761 || (cu
->language
== language_cplus
9762 && last_die
->tag
== DW_TAG_subprogram
9763 && (last_die
->name
== NULL
9764 || strchr (last_die
->name
, '<') == NULL
))
9765 || (cu
->language
!= language_c
9766 && (last_die
->tag
== DW_TAG_class_type
9767 || last_die
->tag
== DW_TAG_interface_type
9768 || last_die
->tag
== DW_TAG_structure_type
9769 || last_die
->tag
== DW_TAG_union_type
))
9770 || (cu
->language
== language_ada
9771 && (last_die
->tag
== DW_TAG_subprogram
9772 || last_die
->tag
== DW_TAG_lexical_block
))))
9775 parent_die
= last_die
;
9779 /* Otherwise we skip to the next sibling, if any. */
9780 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
9782 /* Back to the top, do it again. */
9786 /* Read a minimal amount of information into the minimal die structure. */
9789 read_partial_die (struct partial_die_info
*part_die
,
9790 struct abbrev_info
*abbrev
,
9791 unsigned int abbrev_len
, bfd
*abfd
,
9792 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
9793 struct dwarf2_cu
*cu
)
9795 struct objfile
*objfile
= cu
->objfile
;
9797 struct attribute attr
;
9798 int has_low_pc_attr
= 0;
9799 int has_high_pc_attr
= 0;
9801 memset (part_die
, 0, sizeof (struct partial_die_info
));
9803 part_die
->offset
.sect_off
= info_ptr
- buffer
;
9805 info_ptr
+= abbrev_len
;
9810 part_die
->tag
= abbrev
->tag
;
9811 part_die
->has_children
= abbrev
->has_children
;
9813 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
9815 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
9817 /* Store the data if it is of an attribute we want to keep in a
9818 partial symbol table. */
9822 switch (part_die
->tag
)
9824 case DW_TAG_compile_unit
:
9825 case DW_TAG_type_unit
:
9826 /* Compilation units have a DW_AT_name that is a filename, not
9827 a source language identifier. */
9828 case DW_TAG_enumeration_type
:
9829 case DW_TAG_enumerator
:
9830 /* These tags always have simple identifiers already; no need
9831 to canonicalize them. */
9832 part_die
->name
= DW_STRING (&attr
);
9836 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
9837 &objfile
->objfile_obstack
);
9841 case DW_AT_linkage_name
:
9842 case DW_AT_MIPS_linkage_name
:
9843 /* Note that both forms of linkage name might appear. We
9844 assume they will be the same, and we only store the last
9846 if (cu
->language
== language_ada
)
9847 part_die
->name
= DW_STRING (&attr
);
9848 part_die
->linkage_name
= DW_STRING (&attr
);
9851 has_low_pc_attr
= 1;
9852 part_die
->lowpc
= DW_ADDR (&attr
);
9855 has_high_pc_attr
= 1;
9856 part_die
->highpc
= DW_ADDR (&attr
);
9858 case DW_AT_location
:
9859 /* Support the .debug_loc offsets. */
9860 if (attr_form_is_block (&attr
))
9862 part_die
->locdesc
= DW_BLOCK (&attr
);
9864 else if (attr_form_is_section_offset (&attr
))
9866 dwarf2_complex_location_expr_complaint ();
9870 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
9871 "partial symbol information");
9874 case DW_AT_external
:
9875 part_die
->is_external
= DW_UNSND (&attr
);
9877 case DW_AT_declaration
:
9878 part_die
->is_declaration
= DW_UNSND (&attr
);
9881 part_die
->has_type
= 1;
9883 case DW_AT_abstract_origin
:
9884 case DW_AT_specification
:
9885 case DW_AT_extension
:
9886 part_die
->has_specification
= 1;
9887 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
9890 /* Ignore absolute siblings, they might point outside of
9891 the current compile unit. */
9892 if (attr
.form
== DW_FORM_ref_addr
)
9893 complaint (&symfile_complaints
,
9894 _("ignoring absolute DW_AT_sibling"));
9896 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
9898 case DW_AT_byte_size
:
9899 part_die
->has_byte_size
= 1;
9901 case DW_AT_calling_convention
:
9902 /* DWARF doesn't provide a way to identify a program's source-level
9903 entry point. DW_AT_calling_convention attributes are only meant
9904 to describe functions' calling conventions.
9906 However, because it's a necessary piece of information in
9907 Fortran, and because DW_CC_program is the only piece of debugging
9908 information whose definition refers to a 'main program' at all,
9909 several compilers have begun marking Fortran main programs with
9910 DW_CC_program --- even when those functions use the standard
9911 calling conventions.
9913 So until DWARF specifies a way to provide this information and
9914 compilers pick up the new representation, we'll support this
9916 if (DW_UNSND (&attr
) == DW_CC_program
9917 && cu
->language
== language_fortran
)
9919 set_main_name (part_die
->name
);
9921 /* As this DIE has a static linkage the name would be difficult
9922 to look up later. */
9923 language_of_main
= language_fortran
;
9927 if (DW_UNSND (&attr
) == DW_INL_inlined
9928 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
9929 part_die
->may_be_inlined
= 1;
9936 if (has_low_pc_attr
&& has_high_pc_attr
)
9938 /* When using the GNU linker, .gnu.linkonce. sections are used to
9939 eliminate duplicate copies of functions and vtables and such.
9940 The linker will arbitrarily choose one and discard the others.
9941 The AT_*_pc values for such functions refer to local labels in
9942 these sections. If the section from that file was discarded, the
9943 labels are not in the output, so the relocs get a value of 0.
9944 If this is a discarded function, mark the pc bounds as invalid,
9945 so that GDB will ignore it. */
9946 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
9948 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9950 complaint (&symfile_complaints
,
9951 _("DW_AT_low_pc %s is zero "
9952 "for DIE at 0x%x [in module %s]"),
9953 paddress (gdbarch
, part_die
->lowpc
),
9954 part_die
->offset
.sect_off
, objfile
->name
);
9956 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
9957 else if (part_die
->lowpc
>= part_die
->highpc
)
9959 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9961 complaint (&symfile_complaints
,
9962 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
9963 "for DIE at 0x%x [in module %s]"),
9964 paddress (gdbarch
, part_die
->lowpc
),
9965 paddress (gdbarch
, part_die
->highpc
),
9966 part_die
->offset
.sect_off
, objfile
->name
);
9969 part_die
->has_pc_info
= 1;
9975 /* Find a cached partial DIE at OFFSET in CU. */
9977 static struct partial_die_info
*
9978 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
9980 struct partial_die_info
*lookup_die
= NULL
;
9981 struct partial_die_info part_die
;
9983 part_die
.offset
= offset
;
9984 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
9990 /* Find a partial DIE at OFFSET, which may or may not be in CU,
9991 except in the case of .debug_types DIEs which do not reference
9992 outside their CU (they do however referencing other types via
9993 DW_FORM_ref_sig8). */
9995 static struct partial_die_info
*
9996 find_partial_die (sect_offset offset
, struct dwarf2_cu
*cu
)
9998 struct objfile
*objfile
= cu
->objfile
;
9999 struct dwarf2_per_cu_data
*per_cu
= NULL
;
10000 struct partial_die_info
*pd
= NULL
;
10002 if (offset_in_cu_p (&cu
->header
, offset
))
10004 pd
= find_partial_die_in_comp_unit (offset
, cu
);
10007 /* We missed recording what we needed.
10008 Load all dies and try again. */
10009 per_cu
= cu
->per_cu
;
10013 /* TUs don't reference other CUs/TUs (except via type signatures). */
10014 if (cu
->per_cu
->debug_types_section
)
10016 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
10017 " external reference to offset 0x%lx [in module %s].\n"),
10018 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
10019 bfd_get_filename (objfile
->obfd
));
10021 per_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
10023 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
10024 load_partial_comp_unit (per_cu
);
10026 per_cu
->cu
->last_used
= 0;
10027 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
10030 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
10032 struct cleanup
*back_to
;
10033 struct partial_die_info comp_unit_die
;
10034 struct abbrev_info
*abbrev
;
10035 unsigned int bytes_read
;
10037 struct dwarf2_section_info
*sec
;
10039 per_cu
->load_all_dies
= 1;
10041 if (per_cu
->debug_types_section
)
10042 sec
= per_cu
->debug_types_section
;
10044 sec
= &dwarf2_per_objfile
->info
;
10046 /* Re-read the DIEs, this time reading all of them.
10047 NOTE: We don't discard the previous set of DIEs.
10048 This doesn't happen very often so it's (hopefully) not a problem. */
10049 back_to
= make_cleanup (null_cleanup
, 0);
10050 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
10052 dwarf2_read_abbrevs (per_cu
->cu
);
10053 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
10055 info_ptr
= (sec
->buffer
10056 + per_cu
->cu
->header
.offset
.sect_off
10057 + per_cu
->cu
->header
.first_die_offset
.cu_off
);
10058 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
10059 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
10060 objfile
->obfd
, sec
->buffer
, info_ptr
,
10062 if (comp_unit_die
.has_children
)
10063 load_partial_dies (objfile
->obfd
, sec
->buffer
, info_ptr
, 0,
10065 do_cleanups (back_to
);
10067 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
10071 internal_error (__FILE__
, __LINE__
,
10072 _("could not find partial DIE 0x%x "
10073 "in cache [from module %s]\n"),
10074 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
10078 /* See if we can figure out if the class lives in a namespace. We do
10079 this by looking for a member function; its demangled name will
10080 contain namespace info, if there is any. */
10083 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
10084 struct dwarf2_cu
*cu
)
10086 /* NOTE: carlton/2003-10-07: Getting the info this way changes
10087 what template types look like, because the demangler
10088 frequently doesn't give the same name as the debug info. We
10089 could fix this by only using the demangled name to get the
10090 prefix (but see comment in read_structure_type). */
10092 struct partial_die_info
*real_pdi
;
10093 struct partial_die_info
*child_pdi
;
10095 /* If this DIE (this DIE's specification, if any) has a parent, then
10096 we should not do this. We'll prepend the parent's fully qualified
10097 name when we create the partial symbol. */
10099 real_pdi
= struct_pdi
;
10100 while (real_pdi
->has_specification
)
10101 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
10103 if (real_pdi
->die_parent
!= NULL
)
10106 for (child_pdi
= struct_pdi
->die_child
;
10108 child_pdi
= child_pdi
->die_sibling
)
10110 if (child_pdi
->tag
== DW_TAG_subprogram
10111 && child_pdi
->linkage_name
!= NULL
)
10113 char *actual_class_name
10114 = language_class_name_from_physname (cu
->language_defn
,
10115 child_pdi
->linkage_name
);
10116 if (actual_class_name
!= NULL
)
10119 = obsavestring (actual_class_name
,
10120 strlen (actual_class_name
),
10121 &cu
->objfile
->objfile_obstack
);
10122 xfree (actual_class_name
);
10129 /* Adjust PART_DIE before generating a symbol for it. This function
10130 may set the is_external flag or change the DIE's name. */
10133 fixup_partial_die (struct partial_die_info
*part_die
,
10134 struct dwarf2_cu
*cu
)
10136 /* Once we've fixed up a die, there's no point in doing so again.
10137 This also avoids a memory leak if we were to call
10138 guess_partial_die_structure_name multiple times. */
10139 if (part_die
->fixup_called
)
10142 /* If we found a reference attribute and the DIE has no name, try
10143 to find a name in the referred to DIE. */
10145 if (part_die
->name
== NULL
&& part_die
->has_specification
)
10147 struct partial_die_info
*spec_die
;
10149 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
10151 fixup_partial_die (spec_die
, cu
);
10153 if (spec_die
->name
)
10155 part_die
->name
= spec_die
->name
;
10157 /* Copy DW_AT_external attribute if it is set. */
10158 if (spec_die
->is_external
)
10159 part_die
->is_external
= spec_die
->is_external
;
10163 /* Set default names for some unnamed DIEs. */
10165 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
10166 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
10168 /* If there is no parent die to provide a namespace, and there are
10169 children, see if we can determine the namespace from their linkage
10171 if (cu
->language
== language_cplus
10172 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
10173 && part_die
->die_parent
== NULL
10174 && part_die
->has_children
10175 && (part_die
->tag
== DW_TAG_class_type
10176 || part_die
->tag
== DW_TAG_structure_type
10177 || part_die
->tag
== DW_TAG_union_type
))
10178 guess_partial_die_structure_name (part_die
, cu
);
10180 /* GCC might emit a nameless struct or union that has a linkage
10181 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
10182 if (part_die
->name
== NULL
10183 && (part_die
->tag
== DW_TAG_class_type
10184 || part_die
->tag
== DW_TAG_interface_type
10185 || part_die
->tag
== DW_TAG_structure_type
10186 || part_die
->tag
== DW_TAG_union_type
)
10187 && part_die
->linkage_name
!= NULL
)
10191 demangled
= cplus_demangle (part_die
->linkage_name
, DMGL_TYPES
);
10196 /* Strip any leading namespaces/classes, keep only the base name.
10197 DW_AT_name for named DIEs does not contain the prefixes. */
10198 base
= strrchr (demangled
, ':');
10199 if (base
&& base
> demangled
&& base
[-1] == ':')
10204 part_die
->name
= obsavestring (base
, strlen (base
),
10205 &cu
->objfile
->objfile_obstack
);
10210 part_die
->fixup_called
= 1;
10213 /* Read an attribute value described by an attribute form. */
10216 read_attribute_value (struct attribute
*attr
, unsigned form
,
10217 bfd
*abfd
, gdb_byte
*info_ptr
,
10218 struct dwarf2_cu
*cu
)
10220 struct comp_unit_head
*cu_header
= &cu
->header
;
10221 unsigned int bytes_read
;
10222 struct dwarf_block
*blk
;
10227 case DW_FORM_ref_addr
:
10228 if (cu
->header
.version
== 2)
10229 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
10231 DW_ADDR (attr
) = read_offset (abfd
, info_ptr
,
10232 &cu
->header
, &bytes_read
);
10233 info_ptr
+= bytes_read
;
10236 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
10237 info_ptr
+= bytes_read
;
10239 case DW_FORM_block2
:
10240 blk
= dwarf_alloc_block (cu
);
10241 blk
->size
= read_2_bytes (abfd
, info_ptr
);
10243 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
10244 info_ptr
+= blk
->size
;
10245 DW_BLOCK (attr
) = blk
;
10247 case DW_FORM_block4
:
10248 blk
= dwarf_alloc_block (cu
);
10249 blk
->size
= read_4_bytes (abfd
, info_ptr
);
10251 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
10252 info_ptr
+= blk
->size
;
10253 DW_BLOCK (attr
) = blk
;
10255 case DW_FORM_data2
:
10256 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
10259 case DW_FORM_data4
:
10260 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
10263 case DW_FORM_data8
:
10264 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
10267 case DW_FORM_sec_offset
:
10268 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
10269 info_ptr
+= bytes_read
;
10271 case DW_FORM_string
:
10272 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
10273 DW_STRING_IS_CANONICAL (attr
) = 0;
10274 info_ptr
+= bytes_read
;
10277 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
10279 DW_STRING_IS_CANONICAL (attr
) = 0;
10280 info_ptr
+= bytes_read
;
10282 case DW_FORM_exprloc
:
10283 case DW_FORM_block
:
10284 blk
= dwarf_alloc_block (cu
);
10285 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
10286 info_ptr
+= bytes_read
;
10287 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
10288 info_ptr
+= blk
->size
;
10289 DW_BLOCK (attr
) = blk
;
10291 case DW_FORM_block1
:
10292 blk
= dwarf_alloc_block (cu
);
10293 blk
->size
= read_1_byte (abfd
, info_ptr
);
10295 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
10296 info_ptr
+= blk
->size
;
10297 DW_BLOCK (attr
) = blk
;
10299 case DW_FORM_data1
:
10300 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
10304 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
10307 case DW_FORM_flag_present
:
10308 DW_UNSND (attr
) = 1;
10310 case DW_FORM_sdata
:
10311 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
10312 info_ptr
+= bytes_read
;
10314 case DW_FORM_udata
:
10315 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
10316 info_ptr
+= bytes_read
;
10319 DW_ADDR (attr
) = (cu
->header
.offset
.sect_off
10320 + read_1_byte (abfd
, info_ptr
));
10324 DW_ADDR (attr
) = (cu
->header
.offset
.sect_off
10325 + read_2_bytes (abfd
, info_ptr
));
10329 DW_ADDR (attr
) = (cu
->header
.offset
.sect_off
10330 + read_4_bytes (abfd
, info_ptr
));
10334 DW_ADDR (attr
) = (cu
->header
.offset
.sect_off
10335 + read_8_bytes (abfd
, info_ptr
));
10338 case DW_FORM_ref_sig8
:
10339 /* Convert the signature to something we can record in DW_UNSND
10341 NOTE: This is NULL if the type wasn't found. */
10342 DW_SIGNATURED_TYPE (attr
) =
10343 lookup_signatured_type (read_8_bytes (abfd
, info_ptr
));
10346 case DW_FORM_ref_udata
:
10347 DW_ADDR (attr
) = (cu
->header
.offset
.sect_off
10348 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
10349 info_ptr
+= bytes_read
;
10351 case DW_FORM_indirect
:
10352 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
10353 info_ptr
+= bytes_read
;
10354 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
10357 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
10358 dwarf_form_name (form
),
10359 bfd_get_filename (abfd
));
10362 /* We have seen instances where the compiler tried to emit a byte
10363 size attribute of -1 which ended up being encoded as an unsigned
10364 0xffffffff. Although 0xffffffff is technically a valid size value,
10365 an object of this size seems pretty unlikely so we can relatively
10366 safely treat these cases as if the size attribute was invalid and
10367 treat them as zero by default. */
10368 if (attr
->name
== DW_AT_byte_size
10369 && form
== DW_FORM_data4
10370 && DW_UNSND (attr
) >= 0xffffffff)
10373 (&symfile_complaints
,
10374 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
10375 hex_string (DW_UNSND (attr
)));
10376 DW_UNSND (attr
) = 0;
10382 /* Read an attribute described by an abbreviated attribute. */
10385 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
10386 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
10388 attr
->name
= abbrev
->name
;
10389 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
10392 /* Read dwarf information from a buffer. */
10394 static unsigned int
10395 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
10397 return bfd_get_8 (abfd
, buf
);
10401 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
10403 return bfd_get_signed_8 (abfd
, buf
);
10406 static unsigned int
10407 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
10409 return bfd_get_16 (abfd
, buf
);
10413 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
10415 return bfd_get_signed_16 (abfd
, buf
);
10418 static unsigned int
10419 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
10421 return bfd_get_32 (abfd
, buf
);
10425 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
10427 return bfd_get_signed_32 (abfd
, buf
);
10431 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
10433 return bfd_get_64 (abfd
, buf
);
10437 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
10438 unsigned int *bytes_read
)
10440 struct comp_unit_head
*cu_header
= &cu
->header
;
10441 CORE_ADDR retval
= 0;
10443 if (cu_header
->signed_addr_p
)
10445 switch (cu_header
->addr_size
)
10448 retval
= bfd_get_signed_16 (abfd
, buf
);
10451 retval
= bfd_get_signed_32 (abfd
, buf
);
10454 retval
= bfd_get_signed_64 (abfd
, buf
);
10457 internal_error (__FILE__
, __LINE__
,
10458 _("read_address: bad switch, signed [in module %s]"),
10459 bfd_get_filename (abfd
));
10464 switch (cu_header
->addr_size
)
10467 retval
= bfd_get_16 (abfd
, buf
);
10470 retval
= bfd_get_32 (abfd
, buf
);
10473 retval
= bfd_get_64 (abfd
, buf
);
10476 internal_error (__FILE__
, __LINE__
,
10477 _("read_address: bad switch, "
10478 "unsigned [in module %s]"),
10479 bfd_get_filename (abfd
));
10483 *bytes_read
= cu_header
->addr_size
;
10487 /* Read the initial length from a section. The (draft) DWARF 3
10488 specification allows the initial length to take up either 4 bytes
10489 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
10490 bytes describe the length and all offsets will be 8 bytes in length
10493 An older, non-standard 64-bit format is also handled by this
10494 function. The older format in question stores the initial length
10495 as an 8-byte quantity without an escape value. Lengths greater
10496 than 2^32 aren't very common which means that the initial 4 bytes
10497 is almost always zero. Since a length value of zero doesn't make
10498 sense for the 32-bit format, this initial zero can be considered to
10499 be an escape value which indicates the presence of the older 64-bit
10500 format. As written, the code can't detect (old format) lengths
10501 greater than 4GB. If it becomes necessary to handle lengths
10502 somewhat larger than 4GB, we could allow other small values (such
10503 as the non-sensical values of 1, 2, and 3) to also be used as
10504 escape values indicating the presence of the old format.
10506 The value returned via bytes_read should be used to increment the
10507 relevant pointer after calling read_initial_length().
10509 [ Note: read_initial_length() and read_offset() are based on the
10510 document entitled "DWARF Debugging Information Format", revision
10511 3, draft 8, dated November 19, 2001. This document was obtained
10514 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
10516 This document is only a draft and is subject to change. (So beware.)
10518 Details regarding the older, non-standard 64-bit format were
10519 determined empirically by examining 64-bit ELF files produced by
10520 the SGI toolchain on an IRIX 6.5 machine.
10522 - Kevin, July 16, 2002
10526 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
10528 LONGEST length
= bfd_get_32 (abfd
, buf
);
10530 if (length
== 0xffffffff)
10532 length
= bfd_get_64 (abfd
, buf
+ 4);
10535 else if (length
== 0)
10537 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
10538 length
= bfd_get_64 (abfd
, buf
);
10549 /* Cover function for read_initial_length.
10550 Returns the length of the object at BUF, and stores the size of the
10551 initial length in *BYTES_READ and stores the size that offsets will be in
10553 If the initial length size is not equivalent to that specified in
10554 CU_HEADER then issue a complaint.
10555 This is useful when reading non-comp-unit headers. */
10558 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
10559 const struct comp_unit_head
*cu_header
,
10560 unsigned int *bytes_read
,
10561 unsigned int *offset_size
)
10563 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
10565 gdb_assert (cu_header
->initial_length_size
== 4
10566 || cu_header
->initial_length_size
== 8
10567 || cu_header
->initial_length_size
== 12);
10569 if (cu_header
->initial_length_size
!= *bytes_read
)
10570 complaint (&symfile_complaints
,
10571 _("intermixed 32-bit and 64-bit DWARF sections"));
10573 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
10577 /* Read an offset from the data stream. The size of the offset is
10578 given by cu_header->offset_size. */
10581 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
10582 unsigned int *bytes_read
)
10584 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
10586 *bytes_read
= cu_header
->offset_size
;
10590 /* Read an offset from the data stream. */
10593 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
10595 LONGEST retval
= 0;
10597 switch (offset_size
)
10600 retval
= bfd_get_32 (abfd
, buf
);
10603 retval
= bfd_get_64 (abfd
, buf
);
10606 internal_error (__FILE__
, __LINE__
,
10607 _("read_offset_1: bad switch [in module %s]"),
10608 bfd_get_filename (abfd
));
10615 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
10617 /* If the size of a host char is 8 bits, we can return a pointer
10618 to the buffer, otherwise we have to copy the data to a buffer
10619 allocated on the temporary obstack. */
10620 gdb_assert (HOST_CHAR_BIT
== 8);
10625 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
10627 /* If the size of a host char is 8 bits, we can return a pointer
10628 to the string, otherwise we have to copy the string to a buffer
10629 allocated on the temporary obstack. */
10630 gdb_assert (HOST_CHAR_BIT
== 8);
10633 *bytes_read_ptr
= 1;
10636 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
10637 return (char *) buf
;
10641 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
10643 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
10644 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
10645 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
10646 bfd_get_filename (abfd
));
10647 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
10648 error (_("DW_FORM_strp pointing outside of "
10649 ".debug_str section [in module %s]"),
10650 bfd_get_filename (abfd
));
10651 gdb_assert (HOST_CHAR_BIT
== 8);
10652 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
10654 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
10658 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
10659 const struct comp_unit_head
*cu_header
,
10660 unsigned int *bytes_read_ptr
)
10662 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
10664 return read_indirect_string_at_offset (abfd
, str_offset
);
10667 static unsigned long
10668 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
10670 unsigned long result
;
10671 unsigned int num_read
;
10673 unsigned char byte
;
10681 byte
= bfd_get_8 (abfd
, buf
);
10684 result
|= ((unsigned long)(byte
& 127) << shift
);
10685 if ((byte
& 128) == 0)
10691 *bytes_read_ptr
= num_read
;
10696 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
10699 int i
, shift
, num_read
;
10700 unsigned char byte
;
10708 byte
= bfd_get_8 (abfd
, buf
);
10711 result
|= ((long)(byte
& 127) << shift
);
10713 if ((byte
& 128) == 0)
10718 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
10719 result
|= -(((long)1) << shift
);
10720 *bytes_read_ptr
= num_read
;
10724 /* Return a pointer to just past the end of an LEB128 number in BUF. */
10727 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
10733 byte
= bfd_get_8 (abfd
, buf
);
10735 if ((byte
& 128) == 0)
10741 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
10748 cu
->language
= language_c
;
10750 case DW_LANG_C_plus_plus
:
10751 cu
->language
= language_cplus
;
10754 cu
->language
= language_d
;
10756 case DW_LANG_Fortran77
:
10757 case DW_LANG_Fortran90
:
10758 case DW_LANG_Fortran95
:
10759 cu
->language
= language_fortran
;
10761 case DW_LANG_Mips_Assembler
:
10762 cu
->language
= language_asm
;
10765 cu
->language
= language_java
;
10767 case DW_LANG_Ada83
:
10768 case DW_LANG_Ada95
:
10769 cu
->language
= language_ada
;
10771 case DW_LANG_Modula2
:
10772 cu
->language
= language_m2
;
10774 case DW_LANG_Pascal83
:
10775 cu
->language
= language_pascal
;
10778 cu
->language
= language_objc
;
10780 case DW_LANG_Cobol74
:
10781 case DW_LANG_Cobol85
:
10783 cu
->language
= language_minimal
;
10786 cu
->language_defn
= language_def (cu
->language
);
10789 /* Return the named attribute or NULL if not there. */
10791 static struct attribute
*
10792 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
10797 struct attribute
*spec
= NULL
;
10799 for (i
= 0; i
< die
->num_attrs
; ++i
)
10801 if (die
->attrs
[i
].name
== name
)
10802 return &die
->attrs
[i
];
10803 if (die
->attrs
[i
].name
== DW_AT_specification
10804 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
10805 spec
= &die
->attrs
[i
];
10811 die
= follow_die_ref (die
, spec
, &cu
);
10817 /* Return the named attribute or NULL if not there,
10818 but do not follow DW_AT_specification, etc.
10819 This is for use in contexts where we're reading .debug_types dies.
10820 Following DW_AT_specification, DW_AT_abstract_origin will take us
10821 back up the chain, and we want to go down. */
10823 static struct attribute
*
10824 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
10825 struct dwarf2_cu
*cu
)
10829 for (i
= 0; i
< die
->num_attrs
; ++i
)
10830 if (die
->attrs
[i
].name
== name
)
10831 return &die
->attrs
[i
];
10836 /* Return non-zero iff the attribute NAME is defined for the given DIE,
10837 and holds a non-zero value. This function should only be used for
10838 DW_FORM_flag or DW_FORM_flag_present attributes. */
10841 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
10843 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
10845 return (attr
&& DW_UNSND (attr
));
10849 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
10851 /* A DIE is a declaration if it has a DW_AT_declaration attribute
10852 which value is non-zero. However, we have to be careful with
10853 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
10854 (via dwarf2_flag_true_p) follows this attribute. So we may
10855 end up accidently finding a declaration attribute that belongs
10856 to a different DIE referenced by the specification attribute,
10857 even though the given DIE does not have a declaration attribute. */
10858 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
10859 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
10862 /* Return the die giving the specification for DIE, if there is
10863 one. *SPEC_CU is the CU containing DIE on input, and the CU
10864 containing the return value on output. If there is no
10865 specification, but there is an abstract origin, that is
10868 static struct die_info
*
10869 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
10871 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
10874 if (spec_attr
== NULL
)
10875 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
10877 if (spec_attr
== NULL
)
10880 return follow_die_ref (die
, spec_attr
, spec_cu
);
10883 /* Free the line_header structure *LH, and any arrays and strings it
10885 NOTE: This is also used as a "cleanup" function. */
10888 free_line_header (struct line_header
*lh
)
10890 if (lh
->standard_opcode_lengths
)
10891 xfree (lh
->standard_opcode_lengths
);
10893 /* Remember that all the lh->file_names[i].name pointers are
10894 pointers into debug_line_buffer, and don't need to be freed. */
10895 if (lh
->file_names
)
10896 xfree (lh
->file_names
);
10898 /* Similarly for the include directory names. */
10899 if (lh
->include_dirs
)
10900 xfree (lh
->include_dirs
);
10905 /* Add an entry to LH's include directory table. */
10908 add_include_dir (struct line_header
*lh
, char *include_dir
)
10910 /* Grow the array if necessary. */
10911 if (lh
->include_dirs_size
== 0)
10913 lh
->include_dirs_size
= 1; /* for testing */
10914 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
10915 * sizeof (*lh
->include_dirs
));
10917 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
10919 lh
->include_dirs_size
*= 2;
10920 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
10921 (lh
->include_dirs_size
10922 * sizeof (*lh
->include_dirs
)));
10925 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
10928 /* Add an entry to LH's file name table. */
10931 add_file_name (struct line_header
*lh
,
10933 unsigned int dir_index
,
10934 unsigned int mod_time
,
10935 unsigned int length
)
10937 struct file_entry
*fe
;
10939 /* Grow the array if necessary. */
10940 if (lh
->file_names_size
== 0)
10942 lh
->file_names_size
= 1; /* for testing */
10943 lh
->file_names
= xmalloc (lh
->file_names_size
10944 * sizeof (*lh
->file_names
));
10946 else if (lh
->num_file_names
>= lh
->file_names_size
)
10948 lh
->file_names_size
*= 2;
10949 lh
->file_names
= xrealloc (lh
->file_names
,
10950 (lh
->file_names_size
10951 * sizeof (*lh
->file_names
)));
10954 fe
= &lh
->file_names
[lh
->num_file_names
++];
10956 fe
->dir_index
= dir_index
;
10957 fe
->mod_time
= mod_time
;
10958 fe
->length
= length
;
10959 fe
->included_p
= 0;
10963 /* Read the statement program header starting at OFFSET in
10964 .debug_line, according to the endianness of ABFD. Return a pointer
10965 to a struct line_header, allocated using xmalloc.
10967 NOTE: the strings in the include directory and file name tables of
10968 the returned object point into debug_line_buffer, and must not be
10971 static struct line_header
*
10972 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
10973 struct dwarf2_cu
*cu
)
10975 struct cleanup
*back_to
;
10976 struct line_header
*lh
;
10977 gdb_byte
*line_ptr
;
10978 unsigned int bytes_read
, offset_size
;
10980 char *cur_dir
, *cur_file
;
10982 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->line
);
10983 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
10985 complaint (&symfile_complaints
, _("missing .debug_line section"));
10989 /* Make sure that at least there's room for the total_length field.
10990 That could be 12 bytes long, but we're just going to fudge that. */
10991 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
10993 dwarf2_statement_list_fits_in_line_number_section_complaint ();
10997 lh
= xmalloc (sizeof (*lh
));
10998 memset (lh
, 0, sizeof (*lh
));
10999 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
11002 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
11004 /* Read in the header. */
11006 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
11007 &bytes_read
, &offset_size
);
11008 line_ptr
+= bytes_read
;
11009 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
11010 + dwarf2_per_objfile
->line
.size
))
11012 dwarf2_statement_list_fits_in_line_number_section_complaint ();
11015 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
11016 lh
->version
= read_2_bytes (abfd
, line_ptr
);
11018 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
11019 line_ptr
+= offset_size
;
11020 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
11022 if (lh
->version
>= 4)
11024 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
11028 lh
->maximum_ops_per_instruction
= 1;
11030 if (lh
->maximum_ops_per_instruction
== 0)
11032 lh
->maximum_ops_per_instruction
= 1;
11033 complaint (&symfile_complaints
,
11034 _("invalid maximum_ops_per_instruction "
11035 "in `.debug_line' section"));
11038 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
11040 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
11042 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
11044 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
11046 lh
->standard_opcode_lengths
11047 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
11049 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
11050 for (i
= 1; i
< lh
->opcode_base
; ++i
)
11052 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
11056 /* Read directory table. */
11057 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
11059 line_ptr
+= bytes_read
;
11060 add_include_dir (lh
, cur_dir
);
11062 line_ptr
+= bytes_read
;
11064 /* Read file name table. */
11065 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
11067 unsigned int dir_index
, mod_time
, length
;
11069 line_ptr
+= bytes_read
;
11070 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11071 line_ptr
+= bytes_read
;
11072 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11073 line_ptr
+= bytes_read
;
11074 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11075 line_ptr
+= bytes_read
;
11077 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
11079 line_ptr
+= bytes_read
;
11080 lh
->statement_program_start
= line_ptr
;
11082 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
11083 + dwarf2_per_objfile
->line
.size
))
11084 complaint (&symfile_complaints
,
11085 _("line number info header doesn't "
11086 "fit in `.debug_line' section"));
11088 discard_cleanups (back_to
);
11092 /* Subroutine of dwarf_decode_lines to simplify it.
11093 Return the file name of the psymtab for included file FILE_INDEX
11094 in line header LH of PST.
11095 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
11096 If space for the result is malloc'd, it will be freed by a cleanup.
11097 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
11100 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
11101 const struct partial_symtab
*pst
,
11102 const char *comp_dir
)
11104 const struct file_entry fe
= lh
->file_names
[file_index
];
11105 char *include_name
= fe
.name
;
11106 char *include_name_to_compare
= include_name
;
11107 char *dir_name
= NULL
;
11108 const char *pst_filename
;
11109 char *copied_name
= NULL
;
11113 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
11115 if (!IS_ABSOLUTE_PATH (include_name
)
11116 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
11118 /* Avoid creating a duplicate psymtab for PST.
11119 We do this by comparing INCLUDE_NAME and PST_FILENAME.
11120 Before we do the comparison, however, we need to account
11121 for DIR_NAME and COMP_DIR.
11122 First prepend dir_name (if non-NULL). If we still don't
11123 have an absolute path prepend comp_dir (if non-NULL).
11124 However, the directory we record in the include-file's
11125 psymtab does not contain COMP_DIR (to match the
11126 corresponding symtab(s)).
11131 bash$ gcc -g ./hello.c
11132 include_name = "hello.c"
11134 DW_AT_comp_dir = comp_dir = "/tmp"
11135 DW_AT_name = "./hello.c" */
11137 if (dir_name
!= NULL
)
11139 include_name
= concat (dir_name
, SLASH_STRING
,
11140 include_name
, (char *)NULL
);
11141 include_name_to_compare
= include_name
;
11142 make_cleanup (xfree
, include_name
);
11144 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
11146 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
11147 include_name
, (char *)NULL
);
11151 pst_filename
= pst
->filename
;
11152 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
11154 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
11155 pst_filename
, (char *)NULL
);
11156 pst_filename
= copied_name
;
11159 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
11161 if (include_name_to_compare
!= include_name
)
11162 xfree (include_name_to_compare
);
11163 if (copied_name
!= NULL
)
11164 xfree (copied_name
);
11168 return include_name
;
11171 /* Ignore this record_line request. */
11174 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
11179 /* Subroutine of dwarf_decode_lines to simplify it.
11180 Process the line number information in LH. */
11183 dwarf_decode_lines_1 (struct line_header
*lh
, const char *comp_dir
,
11184 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
11186 gdb_byte
*line_ptr
, *extended_end
;
11187 gdb_byte
*line_end
;
11188 unsigned int bytes_read
, extended_len
;
11189 unsigned char op_code
, extended_op
, adj_opcode
;
11190 CORE_ADDR baseaddr
;
11191 struct objfile
*objfile
= cu
->objfile
;
11192 bfd
*abfd
= objfile
->obfd
;
11193 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11194 const int decode_for_pst_p
= (pst
!= NULL
);
11195 struct subfile
*last_subfile
= NULL
;
11196 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
11199 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11201 line_ptr
= lh
->statement_program_start
;
11202 line_end
= lh
->statement_program_end
;
11204 /* Read the statement sequences until there's nothing left. */
11205 while (line_ptr
< line_end
)
11207 /* state machine registers */
11208 CORE_ADDR address
= 0;
11209 unsigned int file
= 1;
11210 unsigned int line
= 1;
11211 unsigned int column
= 0;
11212 int is_stmt
= lh
->default_is_stmt
;
11213 int basic_block
= 0;
11214 int end_sequence
= 0;
11216 unsigned char op_index
= 0;
11218 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
11220 /* Start a subfile for the current file of the state machine. */
11221 /* lh->include_dirs and lh->file_names are 0-based, but the
11222 directory and file name numbers in the statement program
11224 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
11228 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
11230 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
11233 /* Decode the table. */
11234 while (!end_sequence
)
11236 op_code
= read_1_byte (abfd
, line_ptr
);
11238 if (line_ptr
> line_end
)
11240 dwarf2_debug_line_missing_end_sequence_complaint ();
11244 if (op_code
>= lh
->opcode_base
)
11246 /* Special operand. */
11247 adj_opcode
= op_code
- lh
->opcode_base
;
11248 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
11249 / lh
->maximum_ops_per_instruction
)
11250 * lh
->minimum_instruction_length
);
11251 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
11252 % lh
->maximum_ops_per_instruction
);
11253 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
11254 if (lh
->num_file_names
< file
|| file
== 0)
11255 dwarf2_debug_line_missing_file_complaint ();
11256 /* For now we ignore lines not starting on an
11257 instruction boundary. */
11258 else if (op_index
== 0)
11260 lh
->file_names
[file
- 1].included_p
= 1;
11261 if (!decode_for_pst_p
&& is_stmt
)
11263 if (last_subfile
!= current_subfile
)
11265 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
11267 (*p_record_line
) (last_subfile
, 0, addr
);
11268 last_subfile
= current_subfile
;
11270 /* Append row to matrix using current values. */
11271 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
11272 (*p_record_line
) (current_subfile
, line
, addr
);
11277 else switch (op_code
)
11279 case DW_LNS_extended_op
:
11280 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
11282 line_ptr
+= bytes_read
;
11283 extended_end
= line_ptr
+ extended_len
;
11284 extended_op
= read_1_byte (abfd
, line_ptr
);
11286 switch (extended_op
)
11288 case DW_LNE_end_sequence
:
11289 p_record_line
= record_line
;
11292 case DW_LNE_set_address
:
11293 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
11295 if (address
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
11297 /* This line table is for a function which has been
11298 GCd by the linker. Ignore it. PR gdb/12528 */
11301 = line_ptr
- dwarf2_per_objfile
->line
.buffer
;
11303 complaint (&symfile_complaints
,
11304 _(".debug_line address at offset 0x%lx is 0 "
11306 line_offset
, objfile
->name
);
11307 p_record_line
= noop_record_line
;
11311 line_ptr
+= bytes_read
;
11312 address
+= baseaddr
;
11314 case DW_LNE_define_file
:
11317 unsigned int dir_index
, mod_time
, length
;
11319 cur_file
= read_direct_string (abfd
, line_ptr
,
11321 line_ptr
+= bytes_read
;
11323 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11324 line_ptr
+= bytes_read
;
11326 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11327 line_ptr
+= bytes_read
;
11329 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11330 line_ptr
+= bytes_read
;
11331 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
11334 case DW_LNE_set_discriminator
:
11335 /* The discriminator is not interesting to the debugger;
11337 line_ptr
= extended_end
;
11340 complaint (&symfile_complaints
,
11341 _("mangled .debug_line section"));
11344 /* Make sure that we parsed the extended op correctly. If e.g.
11345 we expected a different address size than the producer used,
11346 we may have read the wrong number of bytes. */
11347 if (line_ptr
!= extended_end
)
11349 complaint (&symfile_complaints
,
11350 _("mangled .debug_line section"));
11355 if (lh
->num_file_names
< file
|| file
== 0)
11356 dwarf2_debug_line_missing_file_complaint ();
11359 lh
->file_names
[file
- 1].included_p
= 1;
11360 if (!decode_for_pst_p
&& is_stmt
)
11362 if (last_subfile
!= current_subfile
)
11364 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
11366 (*p_record_line
) (last_subfile
, 0, addr
);
11367 last_subfile
= current_subfile
;
11369 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
11370 (*p_record_line
) (current_subfile
, line
, addr
);
11375 case DW_LNS_advance_pc
:
11378 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11380 address
+= (((op_index
+ adjust
)
11381 / lh
->maximum_ops_per_instruction
)
11382 * lh
->minimum_instruction_length
);
11383 op_index
= ((op_index
+ adjust
)
11384 % lh
->maximum_ops_per_instruction
);
11385 line_ptr
+= bytes_read
;
11388 case DW_LNS_advance_line
:
11389 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
11390 line_ptr
+= bytes_read
;
11392 case DW_LNS_set_file
:
11394 /* The arrays lh->include_dirs and lh->file_names are
11395 0-based, but the directory and file name numbers in
11396 the statement program are 1-based. */
11397 struct file_entry
*fe
;
11400 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11401 line_ptr
+= bytes_read
;
11402 if (lh
->num_file_names
< file
|| file
== 0)
11403 dwarf2_debug_line_missing_file_complaint ();
11406 fe
= &lh
->file_names
[file
- 1];
11408 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
11409 if (!decode_for_pst_p
)
11411 last_subfile
= current_subfile
;
11412 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
11417 case DW_LNS_set_column
:
11418 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11419 line_ptr
+= bytes_read
;
11421 case DW_LNS_negate_stmt
:
11422 is_stmt
= (!is_stmt
);
11424 case DW_LNS_set_basic_block
:
11427 /* Add to the address register of the state machine the
11428 address increment value corresponding to special opcode
11429 255. I.e., this value is scaled by the minimum
11430 instruction length since special opcode 255 would have
11431 scaled the increment. */
11432 case DW_LNS_const_add_pc
:
11434 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
11436 address
+= (((op_index
+ adjust
)
11437 / lh
->maximum_ops_per_instruction
)
11438 * lh
->minimum_instruction_length
);
11439 op_index
= ((op_index
+ adjust
)
11440 % lh
->maximum_ops_per_instruction
);
11443 case DW_LNS_fixed_advance_pc
:
11444 address
+= read_2_bytes (abfd
, line_ptr
);
11450 /* Unknown standard opcode, ignore it. */
11453 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
11455 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11456 line_ptr
+= bytes_read
;
11461 if (lh
->num_file_names
< file
|| file
== 0)
11462 dwarf2_debug_line_missing_file_complaint ();
11465 lh
->file_names
[file
- 1].included_p
= 1;
11466 if (!decode_for_pst_p
)
11468 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
11469 (*p_record_line
) (current_subfile
, 0, addr
);
11475 /* Decode the Line Number Program (LNP) for the given line_header
11476 structure and CU. The actual information extracted and the type
11477 of structures created from the LNP depends on the value of PST.
11479 1. If PST is NULL, then this procedure uses the data from the program
11480 to create all necessary symbol tables, and their linetables.
11482 2. If PST is not NULL, this procedure reads the program to determine
11483 the list of files included by the unit represented by PST, and
11484 builds all the associated partial symbol tables.
11486 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
11487 It is used for relative paths in the line table.
11488 NOTE: When processing partial symtabs (pst != NULL),
11489 comp_dir == pst->dirname.
11491 NOTE: It is important that psymtabs have the same file name (via strcmp)
11492 as the corresponding symtab. Since COMP_DIR is not used in the name of the
11493 symtab we don't use it in the name of the psymtabs we create.
11494 E.g. expand_line_sal requires this when finding psymtabs to expand.
11495 A good testcase for this is mb-inline.exp. */
11498 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
11499 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
11500 int want_line_info
)
11502 struct objfile
*objfile
= cu
->objfile
;
11503 const int decode_for_pst_p
= (pst
!= NULL
);
11504 struct subfile
*first_subfile
= current_subfile
;
11506 if (want_line_info
)
11507 dwarf_decode_lines_1 (lh
, comp_dir
, cu
, pst
);
11509 if (decode_for_pst_p
)
11513 /* Now that we're done scanning the Line Header Program, we can
11514 create the psymtab of each included file. */
11515 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
11516 if (lh
->file_names
[file_index
].included_p
== 1)
11518 char *include_name
=
11519 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
11520 if (include_name
!= NULL
)
11521 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
11526 /* Make sure a symtab is created for every file, even files
11527 which contain only variables (i.e. no code with associated
11531 for (i
= 0; i
< lh
->num_file_names
; i
++)
11534 struct file_entry
*fe
;
11536 fe
= &lh
->file_names
[i
];
11538 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
11539 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
11541 /* Skip the main file; we don't need it, and it must be
11542 allocated last, so that it will show up before the
11543 non-primary symtabs in the objfile's symtab list. */
11544 if (current_subfile
== first_subfile
)
11547 if (current_subfile
->symtab
== NULL
)
11548 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
11550 fe
->symtab
= current_subfile
->symtab
;
11555 /* Start a subfile for DWARF. FILENAME is the name of the file and
11556 DIRNAME the name of the source directory which contains FILENAME
11557 or NULL if not known. COMP_DIR is the compilation directory for the
11558 linetable's compilation unit or NULL if not known.
11559 This routine tries to keep line numbers from identical absolute and
11560 relative file names in a common subfile.
11562 Using the `list' example from the GDB testsuite, which resides in
11563 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
11564 of /srcdir/list0.c yields the following debugging information for list0.c:
11566 DW_AT_name: /srcdir/list0.c
11567 DW_AT_comp_dir: /compdir
11568 files.files[0].name: list0.h
11569 files.files[0].dir: /srcdir
11570 files.files[1].name: list0.c
11571 files.files[1].dir: /srcdir
11573 The line number information for list0.c has to end up in a single
11574 subfile, so that `break /srcdir/list0.c:1' works as expected.
11575 start_subfile will ensure that this happens provided that we pass the
11576 concatenation of files.files[1].dir and files.files[1].name as the
11580 dwarf2_start_subfile (char *filename
, const char *dirname
,
11581 const char *comp_dir
)
11585 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
11586 `start_symtab' will always pass the contents of DW_AT_comp_dir as
11587 second argument to start_subfile. To be consistent, we do the
11588 same here. In order not to lose the line information directory,
11589 we concatenate it to the filename when it makes sense.
11590 Note that the Dwarf3 standard says (speaking of filenames in line
11591 information): ``The directory index is ignored for file names
11592 that represent full path names''. Thus ignoring dirname in the
11593 `else' branch below isn't an issue. */
11595 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
11596 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
11598 fullname
= filename
;
11600 start_subfile (fullname
, comp_dir
);
11602 if (fullname
!= filename
)
11607 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
11608 struct dwarf2_cu
*cu
)
11610 struct objfile
*objfile
= cu
->objfile
;
11611 struct comp_unit_head
*cu_header
= &cu
->header
;
11613 /* NOTE drow/2003-01-30: There used to be a comment and some special
11614 code here to turn a symbol with DW_AT_external and a
11615 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
11616 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
11617 with some versions of binutils) where shared libraries could have
11618 relocations against symbols in their debug information - the
11619 minimal symbol would have the right address, but the debug info
11620 would not. It's no longer necessary, because we will explicitly
11621 apply relocations when we read in the debug information now. */
11623 /* A DW_AT_location attribute with no contents indicates that a
11624 variable has been optimized away. */
11625 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
11627 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
11631 /* Handle one degenerate form of location expression specially, to
11632 preserve GDB's previous behavior when section offsets are
11633 specified. If this is just a DW_OP_addr then mark this symbol
11636 if (attr_form_is_block (attr
)
11637 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
11638 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
11640 unsigned int dummy
;
11642 SYMBOL_VALUE_ADDRESS (sym
) =
11643 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
11644 SYMBOL_CLASS (sym
) = LOC_STATIC
;
11645 fixup_symbol_section (sym
, objfile
);
11646 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
11647 SYMBOL_SECTION (sym
));
11651 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
11652 expression evaluator, and use LOC_COMPUTED only when necessary
11653 (i.e. when the value of a register or memory location is
11654 referenced, or a thread-local block, etc.). Then again, it might
11655 not be worthwhile. I'm assuming that it isn't unless performance
11656 or memory numbers show me otherwise. */
11658 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
11659 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
11661 if (SYMBOL_COMPUTED_OPS (sym
) == &dwarf2_loclist_funcs
)
11662 cu
->has_loclist
= 1;
11665 /* Given a pointer to a DWARF information entry, figure out if we need
11666 to make a symbol table entry for it, and if so, create a new entry
11667 and return a pointer to it.
11668 If TYPE is NULL, determine symbol type from the die, otherwise
11669 used the passed type.
11670 If SPACE is not NULL, use it to hold the new symbol. If it is
11671 NULL, allocate a new symbol on the objfile's obstack. */
11673 static struct symbol
*
11674 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
11675 struct symbol
*space
)
11677 struct objfile
*objfile
= cu
->objfile
;
11678 struct symbol
*sym
= NULL
;
11680 struct attribute
*attr
= NULL
;
11681 struct attribute
*attr2
= NULL
;
11682 CORE_ADDR baseaddr
;
11683 struct pending
**list_to_add
= NULL
;
11685 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11687 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11689 name
= dwarf2_name (die
, cu
);
11692 const char *linkagename
;
11693 int suppress_add
= 0;
11698 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
11699 OBJSTAT (objfile
, n_syms
++);
11701 /* Cache this symbol's name and the name's demangled form (if any). */
11702 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
11703 linkagename
= dwarf2_physname (name
, die
, cu
);
11704 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
11706 /* Fortran does not have mangling standard and the mangling does differ
11707 between gfortran, iFort etc. */
11708 if (cu
->language
== language_fortran
11709 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
11710 symbol_set_demangled_name (&(sym
->ginfo
),
11711 (char *) dwarf2_full_name (name
, die
, cu
),
11714 /* Default assumptions.
11715 Use the passed type or decode it from the die. */
11716 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
11717 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
11719 SYMBOL_TYPE (sym
) = type
;
11721 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
11722 attr
= dwarf2_attr (die
,
11723 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
11727 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
11730 attr
= dwarf2_attr (die
,
11731 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
11735 int file_index
= DW_UNSND (attr
);
11737 if (cu
->line_header
== NULL
11738 || file_index
> cu
->line_header
->num_file_names
)
11739 complaint (&symfile_complaints
,
11740 _("file index out of range"));
11741 else if (file_index
> 0)
11743 struct file_entry
*fe
;
11745 fe
= &cu
->line_header
->file_names
[file_index
- 1];
11746 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
11753 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11756 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
11758 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
11759 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
11760 SYMBOL_CLASS (sym
) = LOC_LABEL
;
11761 add_symbol_to_list (sym
, cu
->list_in_scope
);
11763 case DW_TAG_subprogram
:
11764 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
11766 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
11767 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
11768 if ((attr2
&& (DW_UNSND (attr2
) != 0))
11769 || cu
->language
== language_ada
)
11771 /* Subprograms marked external are stored as a global symbol.
11772 Ada subprograms, whether marked external or not, are always
11773 stored as a global symbol, because we want to be able to
11774 access them globally. For instance, we want to be able
11775 to break on a nested subprogram without having to
11776 specify the context. */
11777 list_to_add
= &global_symbols
;
11781 list_to_add
= cu
->list_in_scope
;
11784 case DW_TAG_inlined_subroutine
:
11785 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
11787 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
11788 SYMBOL_INLINED (sym
) = 1;
11789 list_to_add
= cu
->list_in_scope
;
11791 case DW_TAG_template_value_param
:
11793 /* Fall through. */
11794 case DW_TAG_constant
:
11795 case DW_TAG_variable
:
11796 case DW_TAG_member
:
11797 /* Compilation with minimal debug info may result in
11798 variables with missing type entries. Change the
11799 misleading `void' type to something sensible. */
11800 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
11802 = objfile_type (objfile
)->nodebug_data_symbol
;
11804 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
11805 /* In the case of DW_TAG_member, we should only be called for
11806 static const members. */
11807 if (die
->tag
== DW_TAG_member
)
11809 /* dwarf2_add_field uses die_is_declaration,
11810 so we do the same. */
11811 gdb_assert (die_is_declaration (die
, cu
));
11816 dwarf2_const_value (attr
, sym
, cu
);
11817 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
11820 if (attr2
&& (DW_UNSND (attr2
) != 0))
11821 list_to_add
= &global_symbols
;
11823 list_to_add
= cu
->list_in_scope
;
11827 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
11830 var_decode_location (attr
, sym
, cu
);
11831 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
11832 if (SYMBOL_CLASS (sym
) == LOC_STATIC
11833 && SYMBOL_VALUE_ADDRESS (sym
) == 0
11834 && !dwarf2_per_objfile
->has_section_at_zero
)
11836 /* When a static variable is eliminated by the linker,
11837 the corresponding debug information is not stripped
11838 out, but the variable address is set to null;
11839 do not add such variables into symbol table. */
11841 else if (attr2
&& (DW_UNSND (attr2
) != 0))
11843 /* Workaround gfortran PR debug/40040 - it uses
11844 DW_AT_location for variables in -fPIC libraries which may
11845 get overriden by other libraries/executable and get
11846 a different address. Resolve it by the minimal symbol
11847 which may come from inferior's executable using copy
11848 relocation. Make this workaround only for gfortran as for
11849 other compilers GDB cannot guess the minimal symbol
11850 Fortran mangling kind. */
11851 if (cu
->language
== language_fortran
&& die
->parent
11852 && die
->parent
->tag
== DW_TAG_module
11854 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
11855 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
11857 /* A variable with DW_AT_external is never static,
11858 but it may be block-scoped. */
11859 list_to_add
= (cu
->list_in_scope
== &file_symbols
11860 ? &global_symbols
: cu
->list_in_scope
);
11863 list_to_add
= cu
->list_in_scope
;
11867 /* We do not know the address of this symbol.
11868 If it is an external symbol and we have type information
11869 for it, enter the symbol as a LOC_UNRESOLVED symbol.
11870 The address of the variable will then be determined from
11871 the minimal symbol table whenever the variable is
11873 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
11874 if (attr2
&& (DW_UNSND (attr2
) != 0)
11875 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
11877 /* A variable with DW_AT_external is never static, but it
11878 may be block-scoped. */
11879 list_to_add
= (cu
->list_in_scope
== &file_symbols
11880 ? &global_symbols
: cu
->list_in_scope
);
11882 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
11884 else if (!die_is_declaration (die
, cu
))
11886 /* Use the default LOC_OPTIMIZED_OUT class. */
11887 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
11889 list_to_add
= cu
->list_in_scope
;
11893 case DW_TAG_formal_parameter
:
11894 /* If we are inside a function, mark this as an argument. If
11895 not, we might be looking at an argument to an inlined function
11896 when we do not have enough information to show inlined frames;
11897 pretend it's a local variable in that case so that the user can
11899 if (context_stack_depth
> 0
11900 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
11901 SYMBOL_IS_ARGUMENT (sym
) = 1;
11902 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
11905 var_decode_location (attr
, sym
, cu
);
11907 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
11910 dwarf2_const_value (attr
, sym
, cu
);
11913 list_to_add
= cu
->list_in_scope
;
11915 case DW_TAG_unspecified_parameters
:
11916 /* From varargs functions; gdb doesn't seem to have any
11917 interest in this information, so just ignore it for now.
11920 case DW_TAG_template_type_param
:
11922 /* Fall through. */
11923 case DW_TAG_class_type
:
11924 case DW_TAG_interface_type
:
11925 case DW_TAG_structure_type
:
11926 case DW_TAG_union_type
:
11927 case DW_TAG_set_type
:
11928 case DW_TAG_enumeration_type
:
11929 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11930 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
11933 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
11934 really ever be static objects: otherwise, if you try
11935 to, say, break of a class's method and you're in a file
11936 which doesn't mention that class, it won't work unless
11937 the check for all static symbols in lookup_symbol_aux
11938 saves you. See the OtherFileClass tests in
11939 gdb.c++/namespace.exp. */
11943 list_to_add
= (cu
->list_in_scope
== &file_symbols
11944 && (cu
->language
== language_cplus
11945 || cu
->language
== language_java
)
11946 ? &global_symbols
: cu
->list_in_scope
);
11948 /* The semantics of C++ state that "struct foo {
11949 ... }" also defines a typedef for "foo". A Java
11950 class declaration also defines a typedef for the
11952 if (cu
->language
== language_cplus
11953 || cu
->language
== language_java
11954 || cu
->language
== language_ada
)
11956 /* The symbol's name is already allocated along
11957 with this objfile, so we don't need to
11958 duplicate it for the type. */
11959 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
11960 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
11965 case DW_TAG_typedef
:
11966 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11967 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
11968 list_to_add
= cu
->list_in_scope
;
11970 case DW_TAG_base_type
:
11971 case DW_TAG_subrange_type
:
11972 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11973 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
11974 list_to_add
= cu
->list_in_scope
;
11976 case DW_TAG_enumerator
:
11977 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
11980 dwarf2_const_value (attr
, sym
, cu
);
11983 /* NOTE: carlton/2003-11-10: See comment above in the
11984 DW_TAG_class_type, etc. block. */
11986 list_to_add
= (cu
->list_in_scope
== &file_symbols
11987 && (cu
->language
== language_cplus
11988 || cu
->language
== language_java
)
11989 ? &global_symbols
: cu
->list_in_scope
);
11992 case DW_TAG_namespace
:
11993 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11994 list_to_add
= &global_symbols
;
11997 /* Not a tag we recognize. Hopefully we aren't processing
11998 trash data, but since we must specifically ignore things
11999 we don't recognize, there is nothing else we should do at
12001 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
12002 dwarf_tag_name (die
->tag
));
12008 sym
->hash_next
= objfile
->template_symbols
;
12009 objfile
->template_symbols
= sym
;
12010 list_to_add
= NULL
;
12013 if (list_to_add
!= NULL
)
12014 add_symbol_to_list (sym
, list_to_add
);
12016 /* For the benefit of old versions of GCC, check for anonymous
12017 namespaces based on the demangled name. */
12018 if (!processing_has_namespace_info
12019 && cu
->language
== language_cplus
)
12020 cp_scan_for_anonymous_namespaces (sym
, objfile
);
12025 /* A wrapper for new_symbol_full that always allocates a new symbol. */
12027 static struct symbol
*
12028 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
12030 return new_symbol_full (die
, type
, cu
, NULL
);
12033 /* Given an attr with a DW_FORM_dataN value in host byte order,
12034 zero-extend it as appropriate for the symbol's type. The DWARF
12035 standard (v4) is not entirely clear about the meaning of using
12036 DW_FORM_dataN for a constant with a signed type, where the type is
12037 wider than the data. The conclusion of a discussion on the DWARF
12038 list was that this is unspecified. We choose to always zero-extend
12039 because that is the interpretation long in use by GCC. */
12042 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
12043 const char *name
, struct obstack
*obstack
,
12044 struct dwarf2_cu
*cu
, long *value
, int bits
)
12046 struct objfile
*objfile
= cu
->objfile
;
12047 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
12048 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
12049 LONGEST l
= DW_UNSND (attr
);
12051 if (bits
< sizeof (*value
) * 8)
12053 l
&= ((LONGEST
) 1 << bits
) - 1;
12056 else if (bits
== sizeof (*value
) * 8)
12060 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
12061 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
12068 /* Read a constant value from an attribute. Either set *VALUE, or if
12069 the value does not fit in *VALUE, set *BYTES - either already
12070 allocated on the objfile obstack, or newly allocated on OBSTACK,
12071 or, set *BATON, if we translated the constant to a location
12075 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
12076 const char *name
, struct obstack
*obstack
,
12077 struct dwarf2_cu
*cu
,
12078 long *value
, gdb_byte
**bytes
,
12079 struct dwarf2_locexpr_baton
**baton
)
12081 struct objfile
*objfile
= cu
->objfile
;
12082 struct comp_unit_head
*cu_header
= &cu
->header
;
12083 struct dwarf_block
*blk
;
12084 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
12085 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
12091 switch (attr
->form
)
12097 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
12098 dwarf2_const_value_length_mismatch_complaint (name
,
12099 cu_header
->addr_size
,
12100 TYPE_LENGTH (type
));
12101 /* Symbols of this form are reasonably rare, so we just
12102 piggyback on the existing location code rather than writing
12103 a new implementation of symbol_computed_ops. */
12104 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
12105 sizeof (struct dwarf2_locexpr_baton
));
12106 (*baton
)->per_cu
= cu
->per_cu
;
12107 gdb_assert ((*baton
)->per_cu
);
12109 (*baton
)->size
= 2 + cu_header
->addr_size
;
12110 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
12111 (*baton
)->data
= data
;
12113 data
[0] = DW_OP_addr
;
12114 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
12115 byte_order
, DW_ADDR (attr
));
12116 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
12119 case DW_FORM_string
:
12121 /* DW_STRING is already allocated on the objfile obstack, point
12123 *bytes
= (gdb_byte
*) DW_STRING (attr
);
12125 case DW_FORM_block1
:
12126 case DW_FORM_block2
:
12127 case DW_FORM_block4
:
12128 case DW_FORM_block
:
12129 case DW_FORM_exprloc
:
12130 blk
= DW_BLOCK (attr
);
12131 if (TYPE_LENGTH (type
) != blk
->size
)
12132 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
12133 TYPE_LENGTH (type
));
12134 *bytes
= blk
->data
;
12137 /* The DW_AT_const_value attributes are supposed to carry the
12138 symbol's value "represented as it would be on the target
12139 architecture." By the time we get here, it's already been
12140 converted to host endianness, so we just need to sign- or
12141 zero-extend it as appropriate. */
12142 case DW_FORM_data1
:
12143 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
12144 obstack
, cu
, value
, 8);
12146 case DW_FORM_data2
:
12147 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
12148 obstack
, cu
, value
, 16);
12150 case DW_FORM_data4
:
12151 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
12152 obstack
, cu
, value
, 32);
12154 case DW_FORM_data8
:
12155 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
12156 obstack
, cu
, value
, 64);
12159 case DW_FORM_sdata
:
12160 *value
= DW_SND (attr
);
12163 case DW_FORM_udata
:
12164 *value
= DW_UNSND (attr
);
12168 complaint (&symfile_complaints
,
12169 _("unsupported const value attribute form: '%s'"),
12170 dwarf_form_name (attr
->form
));
12177 /* Copy constant value from an attribute to a symbol. */
12180 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
12181 struct dwarf2_cu
*cu
)
12183 struct objfile
*objfile
= cu
->objfile
;
12184 struct comp_unit_head
*cu_header
= &cu
->header
;
12187 struct dwarf2_locexpr_baton
*baton
;
12189 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
12190 SYMBOL_PRINT_NAME (sym
),
12191 &objfile
->objfile_obstack
, cu
,
12192 &value
, &bytes
, &baton
);
12196 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
12197 SYMBOL_LOCATION_BATON (sym
) = baton
;
12198 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
12200 else if (bytes
!= NULL
)
12202 SYMBOL_VALUE_BYTES (sym
) = bytes
;
12203 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
12207 SYMBOL_VALUE (sym
) = value
;
12208 SYMBOL_CLASS (sym
) = LOC_CONST
;
12212 /* Return the type of the die in question using its DW_AT_type attribute. */
12214 static struct type
*
12215 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12217 struct attribute
*type_attr
;
12219 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
12222 /* A missing DW_AT_type represents a void type. */
12223 return objfile_type (cu
->objfile
)->builtin_void
;
12226 return lookup_die_type (die
, type_attr
, cu
);
12229 /* True iff CU's producer generates GNAT Ada auxiliary information
12230 that allows to find parallel types through that information instead
12231 of having to do expensive parallel lookups by type name. */
12234 need_gnat_info (struct dwarf2_cu
*cu
)
12236 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
12237 of GNAT produces this auxiliary information, without any indication
12238 that it is produced. Part of enhancing the FSF version of GNAT
12239 to produce that information will be to put in place an indicator
12240 that we can use in order to determine whether the descriptive type
12241 info is available or not. One suggestion that has been made is
12242 to use a new attribute, attached to the CU die. For now, assume
12243 that the descriptive type info is not available. */
12247 /* Return the auxiliary type of the die in question using its
12248 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
12249 attribute is not present. */
12251 static struct type
*
12252 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12254 struct attribute
*type_attr
;
12256 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
12260 return lookup_die_type (die
, type_attr
, cu
);
12263 /* If DIE has a descriptive_type attribute, then set the TYPE's
12264 descriptive type accordingly. */
12267 set_descriptive_type (struct type
*type
, struct die_info
*die
,
12268 struct dwarf2_cu
*cu
)
12270 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
12272 if (descriptive_type
)
12274 ALLOCATE_GNAT_AUX_TYPE (type
);
12275 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
12279 /* Return the containing type of the die in question using its
12280 DW_AT_containing_type attribute. */
12282 static struct type
*
12283 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12285 struct attribute
*type_attr
;
12287 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
12289 error (_("Dwarf Error: Problem turning containing type into gdb type "
12290 "[in module %s]"), cu
->objfile
->name
);
12292 return lookup_die_type (die
, type_attr
, cu
);
12295 /* Look up the type of DIE in CU using its type attribute ATTR.
12296 If there is no type substitute an error marker. */
12298 static struct type
*
12299 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
12300 struct dwarf2_cu
*cu
)
12302 struct objfile
*objfile
= cu
->objfile
;
12303 struct type
*this_type
;
12305 /* First see if we have it cached. */
12307 if (is_ref_attr (attr
))
12309 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
12311 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
12313 else if (attr
->form
== DW_FORM_ref_sig8
)
12315 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
12316 struct dwarf2_cu
*sig_cu
;
12317 sect_offset offset
;
12319 /* sig_type will be NULL if the signatured type is missing from
12321 if (sig_type
== NULL
)
12322 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
12323 "at 0x%x [in module %s]"),
12324 die
->offset
.sect_off
, objfile
->name
);
12326 gdb_assert (sig_type
->per_cu
.debug_types_section
);
12327 offset
.sect_off
= (sig_type
->per_cu
.offset
.sect_off
12328 + sig_type
->type_offset
.cu_off
);
12329 this_type
= get_die_type_at_offset (offset
, &sig_type
->per_cu
);
12333 dump_die_for_error (die
);
12334 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
12335 dwarf_attr_name (attr
->name
), objfile
->name
);
12338 /* If not cached we need to read it in. */
12340 if (this_type
== NULL
)
12342 struct die_info
*type_die
;
12343 struct dwarf2_cu
*type_cu
= cu
;
12345 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
12346 /* If the type is cached, we should have found it above. */
12347 gdb_assert (get_die_type (type_die
, type_cu
) == NULL
);
12348 this_type
= read_type_die_1 (type_die
, type_cu
);
12351 /* If we still don't have a type use an error marker. */
12353 if (this_type
== NULL
)
12355 char *message
, *saved
;
12357 /* read_type_die already issued a complaint. */
12358 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
12360 cu
->header
.offset
.sect_off
,
12361 die
->offset
.sect_off
);
12362 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
12363 message
, strlen (message
));
12366 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
12372 /* Return the type in DIE, CU.
12373 Returns NULL for invalid types.
12375 This first does a lookup in the appropriate type_hash table,
12376 and only reads the die in if necessary.
12378 NOTE: This can be called when reading in partial or full symbols. */
12380 static struct type
*
12381 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
12383 struct type
*this_type
;
12385 this_type
= get_die_type (die
, cu
);
12389 return read_type_die_1 (die
, cu
);
12392 /* Read the type in DIE, CU.
12393 Returns NULL for invalid types. */
12395 static struct type
*
12396 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
12398 struct type
*this_type
= NULL
;
12402 case DW_TAG_class_type
:
12403 case DW_TAG_interface_type
:
12404 case DW_TAG_structure_type
:
12405 case DW_TAG_union_type
:
12406 this_type
= read_structure_type (die
, cu
);
12408 case DW_TAG_enumeration_type
:
12409 this_type
= read_enumeration_type (die
, cu
);
12411 case DW_TAG_subprogram
:
12412 case DW_TAG_subroutine_type
:
12413 case DW_TAG_inlined_subroutine
:
12414 this_type
= read_subroutine_type (die
, cu
);
12416 case DW_TAG_array_type
:
12417 this_type
= read_array_type (die
, cu
);
12419 case DW_TAG_set_type
:
12420 this_type
= read_set_type (die
, cu
);
12422 case DW_TAG_pointer_type
:
12423 this_type
= read_tag_pointer_type (die
, cu
);
12425 case DW_TAG_ptr_to_member_type
:
12426 this_type
= read_tag_ptr_to_member_type (die
, cu
);
12428 case DW_TAG_reference_type
:
12429 this_type
= read_tag_reference_type (die
, cu
);
12431 case DW_TAG_const_type
:
12432 this_type
= read_tag_const_type (die
, cu
);
12434 case DW_TAG_volatile_type
:
12435 this_type
= read_tag_volatile_type (die
, cu
);
12437 case DW_TAG_string_type
:
12438 this_type
= read_tag_string_type (die
, cu
);
12440 case DW_TAG_typedef
:
12441 this_type
= read_typedef (die
, cu
);
12443 case DW_TAG_subrange_type
:
12444 this_type
= read_subrange_type (die
, cu
);
12446 case DW_TAG_base_type
:
12447 this_type
= read_base_type (die
, cu
);
12449 case DW_TAG_unspecified_type
:
12450 this_type
= read_unspecified_type (die
, cu
);
12452 case DW_TAG_namespace
:
12453 this_type
= read_namespace_type (die
, cu
);
12455 case DW_TAG_module
:
12456 this_type
= read_module_type (die
, cu
);
12459 complaint (&symfile_complaints
,
12460 _("unexpected tag in read_type_die: '%s'"),
12461 dwarf_tag_name (die
->tag
));
12468 /* See if we can figure out if the class lives in a namespace. We do
12469 this by looking for a member function; its demangled name will
12470 contain namespace info, if there is any.
12471 Return the computed name or NULL.
12472 Space for the result is allocated on the objfile's obstack.
12473 This is the full-die version of guess_partial_die_structure_name.
12474 In this case we know DIE has no useful parent. */
12477 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
12479 struct die_info
*spec_die
;
12480 struct dwarf2_cu
*spec_cu
;
12481 struct die_info
*child
;
12484 spec_die
= die_specification (die
, &spec_cu
);
12485 if (spec_die
!= NULL
)
12491 for (child
= die
->child
;
12493 child
= child
->sibling
)
12495 if (child
->tag
== DW_TAG_subprogram
)
12497 struct attribute
*attr
;
12499 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
12501 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
12505 = language_class_name_from_physname (cu
->language_defn
,
12509 if (actual_name
!= NULL
)
12511 char *die_name
= dwarf2_name (die
, cu
);
12513 if (die_name
!= NULL
12514 && strcmp (die_name
, actual_name
) != 0)
12516 /* Strip off the class name from the full name.
12517 We want the prefix. */
12518 int die_name_len
= strlen (die_name
);
12519 int actual_name_len
= strlen (actual_name
);
12521 /* Test for '::' as a sanity check. */
12522 if (actual_name_len
> die_name_len
+ 2
12523 && actual_name
[actual_name_len
12524 - die_name_len
- 1] == ':')
12526 obsavestring (actual_name
,
12527 actual_name_len
- die_name_len
- 2,
12528 &cu
->objfile
->objfile_obstack
);
12531 xfree (actual_name
);
12540 /* GCC might emit a nameless typedef that has a linkage name. Determine the
12541 prefix part in such case. See
12542 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
12545 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
12547 struct attribute
*attr
;
12550 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
12551 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
12554 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
12555 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
12558 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
12560 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
12561 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
12564 /* dwarf2_name had to be already called. */
12565 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
12567 /* Strip the base name, keep any leading namespaces/classes. */
12568 base
= strrchr (DW_STRING (attr
), ':');
12569 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
12572 return obsavestring (DW_STRING (attr
), &base
[-1] - DW_STRING (attr
),
12573 &cu
->objfile
->objfile_obstack
);
12576 /* Return the name of the namespace/class that DIE is defined within,
12577 or "" if we can't tell. The caller should not xfree the result.
12579 For example, if we're within the method foo() in the following
12589 then determine_prefix on foo's die will return "N::C". */
12591 static const char *
12592 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
12594 struct die_info
*parent
, *spec_die
;
12595 struct dwarf2_cu
*spec_cu
;
12596 struct type
*parent_type
;
12599 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
12600 && cu
->language
!= language_fortran
)
12603 retval
= anonymous_struct_prefix (die
, cu
);
12607 /* We have to be careful in the presence of DW_AT_specification.
12608 For example, with GCC 3.4, given the code
12612 // Definition of N::foo.
12616 then we'll have a tree of DIEs like this:
12618 1: DW_TAG_compile_unit
12619 2: DW_TAG_namespace // N
12620 3: DW_TAG_subprogram // declaration of N::foo
12621 4: DW_TAG_subprogram // definition of N::foo
12622 DW_AT_specification // refers to die #3
12624 Thus, when processing die #4, we have to pretend that we're in
12625 the context of its DW_AT_specification, namely the contex of die
12628 spec_die
= die_specification (die
, &spec_cu
);
12629 if (spec_die
== NULL
)
12630 parent
= die
->parent
;
12633 parent
= spec_die
->parent
;
12637 if (parent
== NULL
)
12639 else if (parent
->building_fullname
)
12642 const char *parent_name
;
12644 /* It has been seen on RealView 2.2 built binaries,
12645 DW_TAG_template_type_param types actually _defined_ as
12646 children of the parent class:
12649 template class <class Enum> Class{};
12650 Class<enum E> class_e;
12652 1: DW_TAG_class_type (Class)
12653 2: DW_TAG_enumeration_type (E)
12654 3: DW_TAG_enumerator (enum1:0)
12655 3: DW_TAG_enumerator (enum2:1)
12657 2: DW_TAG_template_type_param
12658 DW_AT_type DW_FORM_ref_udata (E)
12660 Besides being broken debug info, it can put GDB into an
12661 infinite loop. Consider:
12663 When we're building the full name for Class<E>, we'll start
12664 at Class, and go look over its template type parameters,
12665 finding E. We'll then try to build the full name of E, and
12666 reach here. We're now trying to build the full name of E,
12667 and look over the parent DIE for containing scope. In the
12668 broken case, if we followed the parent DIE of E, we'd again
12669 find Class, and once again go look at its template type
12670 arguments, etc., etc. Simply don't consider such parent die
12671 as source-level parent of this die (it can't be, the language
12672 doesn't allow it), and break the loop here. */
12673 name
= dwarf2_name (die
, cu
);
12674 parent_name
= dwarf2_name (parent
, cu
);
12675 complaint (&symfile_complaints
,
12676 _("template param type '%s' defined within parent '%s'"),
12677 name
? name
: "<unknown>",
12678 parent_name
? parent_name
: "<unknown>");
12682 switch (parent
->tag
)
12684 case DW_TAG_namespace
:
12685 parent_type
= read_type_die (parent
, cu
);
12686 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
12687 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
12688 Work around this problem here. */
12689 if (cu
->language
== language_cplus
12690 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
12692 /* We give a name to even anonymous namespaces. */
12693 return TYPE_TAG_NAME (parent_type
);
12694 case DW_TAG_class_type
:
12695 case DW_TAG_interface_type
:
12696 case DW_TAG_structure_type
:
12697 case DW_TAG_union_type
:
12698 case DW_TAG_module
:
12699 parent_type
= read_type_die (parent
, cu
);
12700 if (TYPE_TAG_NAME (parent_type
) != NULL
)
12701 return TYPE_TAG_NAME (parent_type
);
12703 /* An anonymous structure is only allowed non-static data
12704 members; no typedefs, no member functions, et cetera.
12705 So it does not need a prefix. */
12707 case DW_TAG_compile_unit
:
12708 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
12709 if (cu
->language
== language_cplus
12710 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
12711 && die
->child
!= NULL
12712 && (die
->tag
== DW_TAG_class_type
12713 || die
->tag
== DW_TAG_structure_type
12714 || die
->tag
== DW_TAG_union_type
))
12716 char *name
= guess_full_die_structure_name (die
, cu
);
12722 return determine_prefix (parent
, cu
);
12726 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
12727 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
12728 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
12729 an obconcat, otherwise allocate storage for the result. The CU argument is
12730 used to determine the language and hence, the appropriate separator. */
12732 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
12735 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
12736 int physname
, struct dwarf2_cu
*cu
)
12738 const char *lead
= "";
12741 if (suffix
== NULL
|| suffix
[0] == '\0'
12742 || prefix
== NULL
|| prefix
[0] == '\0')
12744 else if (cu
->language
== language_java
)
12746 else if (cu
->language
== language_fortran
&& physname
)
12748 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
12749 DW_AT_MIPS_linkage_name is preferred and used instead. */
12757 if (prefix
== NULL
)
12759 if (suffix
== NULL
)
12765 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
12767 strcpy (retval
, lead
);
12768 strcat (retval
, prefix
);
12769 strcat (retval
, sep
);
12770 strcat (retval
, suffix
);
12775 /* We have an obstack. */
12776 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
12780 /* Return sibling of die, NULL if no sibling. */
12782 static struct die_info
*
12783 sibling_die (struct die_info
*die
)
12785 return die
->sibling
;
12788 /* Get name of a die, return NULL if not found. */
12791 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
12792 struct obstack
*obstack
)
12794 if (name
&& cu
->language
== language_cplus
)
12796 char *canon_name
= cp_canonicalize_string (name
);
12798 if (canon_name
!= NULL
)
12800 if (strcmp (canon_name
, name
) != 0)
12801 name
= obsavestring (canon_name
, strlen (canon_name
),
12803 xfree (canon_name
);
12810 /* Get name of a die, return NULL if not found. */
12813 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
12815 struct attribute
*attr
;
12817 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
12818 if ((!attr
|| !DW_STRING (attr
))
12819 && die
->tag
!= DW_TAG_class_type
12820 && die
->tag
!= DW_TAG_interface_type
12821 && die
->tag
!= DW_TAG_structure_type
12822 && die
->tag
!= DW_TAG_union_type
)
12827 case DW_TAG_compile_unit
:
12828 /* Compilation units have a DW_AT_name that is a filename, not
12829 a source language identifier. */
12830 case DW_TAG_enumeration_type
:
12831 case DW_TAG_enumerator
:
12832 /* These tags always have simple identifiers already; no need
12833 to canonicalize them. */
12834 return DW_STRING (attr
);
12836 case DW_TAG_subprogram
:
12837 /* Java constructors will all be named "<init>", so return
12838 the class name when we see this special case. */
12839 if (cu
->language
== language_java
12840 && DW_STRING (attr
) != NULL
12841 && strcmp (DW_STRING (attr
), "<init>") == 0)
12843 struct dwarf2_cu
*spec_cu
= cu
;
12844 struct die_info
*spec_die
;
12846 /* GCJ will output '<init>' for Java constructor names.
12847 For this special case, return the name of the parent class. */
12849 /* GCJ may output suprogram DIEs with AT_specification set.
12850 If so, use the name of the specified DIE. */
12851 spec_die
= die_specification (die
, &spec_cu
);
12852 if (spec_die
!= NULL
)
12853 return dwarf2_name (spec_die
, spec_cu
);
12858 if (die
->tag
== DW_TAG_class_type
)
12859 return dwarf2_name (die
, cu
);
12861 while (die
->tag
!= DW_TAG_compile_unit
);
12865 case DW_TAG_class_type
:
12866 case DW_TAG_interface_type
:
12867 case DW_TAG_structure_type
:
12868 case DW_TAG_union_type
:
12869 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
12870 structures or unions. These were of the form "._%d" in GCC 4.1,
12871 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
12872 and GCC 4.4. We work around this problem by ignoring these. */
12873 if (attr
&& DW_STRING (attr
)
12874 && (strncmp (DW_STRING (attr
), "._", 2) == 0
12875 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
12878 /* GCC might emit a nameless typedef that has a linkage name. See
12879 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
12880 if (!attr
|| DW_STRING (attr
) == NULL
)
12882 char *demangled
= NULL
;
12884 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
12886 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
12888 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
12891 /* Avoid demangling DW_STRING (attr) the second time on a second
12892 call for the same DIE. */
12893 if (!DW_STRING_IS_CANONICAL (attr
))
12894 demangled
= cplus_demangle (DW_STRING (attr
), DMGL_TYPES
);
12900 /* FIXME: we already did this for the partial symbol... */
12901 DW_STRING (attr
) = obsavestring (demangled
, strlen (demangled
),
12902 &cu
->objfile
->objfile_obstack
);
12903 DW_STRING_IS_CANONICAL (attr
) = 1;
12906 /* Strip any leading namespaces/classes, keep only the base name.
12907 DW_AT_name for named DIEs does not contain the prefixes. */
12908 base
= strrchr (DW_STRING (attr
), ':');
12909 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
12912 return DW_STRING (attr
);
12921 if (!DW_STRING_IS_CANONICAL (attr
))
12924 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
12925 &cu
->objfile
->objfile_obstack
);
12926 DW_STRING_IS_CANONICAL (attr
) = 1;
12928 return DW_STRING (attr
);
12931 /* Return the die that this die in an extension of, or NULL if there
12932 is none. *EXT_CU is the CU containing DIE on input, and the CU
12933 containing the return value on output. */
12935 static struct die_info
*
12936 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
12938 struct attribute
*attr
;
12940 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
12944 return follow_die_ref (die
, attr
, ext_cu
);
12947 /* Convert a DIE tag into its string name. */
12950 dwarf_tag_name (unsigned tag
)
12954 case DW_TAG_padding
:
12955 return "DW_TAG_padding";
12956 case DW_TAG_array_type
:
12957 return "DW_TAG_array_type";
12958 case DW_TAG_class_type
:
12959 return "DW_TAG_class_type";
12960 case DW_TAG_entry_point
:
12961 return "DW_TAG_entry_point";
12962 case DW_TAG_enumeration_type
:
12963 return "DW_TAG_enumeration_type";
12964 case DW_TAG_formal_parameter
:
12965 return "DW_TAG_formal_parameter";
12966 case DW_TAG_imported_declaration
:
12967 return "DW_TAG_imported_declaration";
12969 return "DW_TAG_label";
12970 case DW_TAG_lexical_block
:
12971 return "DW_TAG_lexical_block";
12972 case DW_TAG_member
:
12973 return "DW_TAG_member";
12974 case DW_TAG_pointer_type
:
12975 return "DW_TAG_pointer_type";
12976 case DW_TAG_reference_type
:
12977 return "DW_TAG_reference_type";
12978 case DW_TAG_compile_unit
:
12979 return "DW_TAG_compile_unit";
12980 case DW_TAG_string_type
:
12981 return "DW_TAG_string_type";
12982 case DW_TAG_structure_type
:
12983 return "DW_TAG_structure_type";
12984 case DW_TAG_subroutine_type
:
12985 return "DW_TAG_subroutine_type";
12986 case DW_TAG_typedef
:
12987 return "DW_TAG_typedef";
12988 case DW_TAG_union_type
:
12989 return "DW_TAG_union_type";
12990 case DW_TAG_unspecified_parameters
:
12991 return "DW_TAG_unspecified_parameters";
12992 case DW_TAG_variant
:
12993 return "DW_TAG_variant";
12994 case DW_TAG_common_block
:
12995 return "DW_TAG_common_block";
12996 case DW_TAG_common_inclusion
:
12997 return "DW_TAG_common_inclusion";
12998 case DW_TAG_inheritance
:
12999 return "DW_TAG_inheritance";
13000 case DW_TAG_inlined_subroutine
:
13001 return "DW_TAG_inlined_subroutine";
13002 case DW_TAG_module
:
13003 return "DW_TAG_module";
13004 case DW_TAG_ptr_to_member_type
:
13005 return "DW_TAG_ptr_to_member_type";
13006 case DW_TAG_set_type
:
13007 return "DW_TAG_set_type";
13008 case DW_TAG_subrange_type
:
13009 return "DW_TAG_subrange_type";
13010 case DW_TAG_with_stmt
:
13011 return "DW_TAG_with_stmt";
13012 case DW_TAG_access_declaration
:
13013 return "DW_TAG_access_declaration";
13014 case DW_TAG_base_type
:
13015 return "DW_TAG_base_type";
13016 case DW_TAG_catch_block
:
13017 return "DW_TAG_catch_block";
13018 case DW_TAG_const_type
:
13019 return "DW_TAG_const_type";
13020 case DW_TAG_constant
:
13021 return "DW_TAG_constant";
13022 case DW_TAG_enumerator
:
13023 return "DW_TAG_enumerator";
13024 case DW_TAG_file_type
:
13025 return "DW_TAG_file_type";
13026 case DW_TAG_friend
:
13027 return "DW_TAG_friend";
13028 case DW_TAG_namelist
:
13029 return "DW_TAG_namelist";
13030 case DW_TAG_namelist_item
:
13031 return "DW_TAG_namelist_item";
13032 case DW_TAG_packed_type
:
13033 return "DW_TAG_packed_type";
13034 case DW_TAG_subprogram
:
13035 return "DW_TAG_subprogram";
13036 case DW_TAG_template_type_param
:
13037 return "DW_TAG_template_type_param";
13038 case DW_TAG_template_value_param
:
13039 return "DW_TAG_template_value_param";
13040 case DW_TAG_thrown_type
:
13041 return "DW_TAG_thrown_type";
13042 case DW_TAG_try_block
:
13043 return "DW_TAG_try_block";
13044 case DW_TAG_variant_part
:
13045 return "DW_TAG_variant_part";
13046 case DW_TAG_variable
:
13047 return "DW_TAG_variable";
13048 case DW_TAG_volatile_type
:
13049 return "DW_TAG_volatile_type";
13050 case DW_TAG_dwarf_procedure
:
13051 return "DW_TAG_dwarf_procedure";
13052 case DW_TAG_restrict_type
:
13053 return "DW_TAG_restrict_type";
13054 case DW_TAG_interface_type
:
13055 return "DW_TAG_interface_type";
13056 case DW_TAG_namespace
:
13057 return "DW_TAG_namespace";
13058 case DW_TAG_imported_module
:
13059 return "DW_TAG_imported_module";
13060 case DW_TAG_unspecified_type
:
13061 return "DW_TAG_unspecified_type";
13062 case DW_TAG_partial_unit
:
13063 return "DW_TAG_partial_unit";
13064 case DW_TAG_imported_unit
:
13065 return "DW_TAG_imported_unit";
13066 case DW_TAG_condition
:
13067 return "DW_TAG_condition";
13068 case DW_TAG_shared_type
:
13069 return "DW_TAG_shared_type";
13070 case DW_TAG_type_unit
:
13071 return "DW_TAG_type_unit";
13072 case DW_TAG_MIPS_loop
:
13073 return "DW_TAG_MIPS_loop";
13074 case DW_TAG_HP_array_descriptor
:
13075 return "DW_TAG_HP_array_descriptor";
13076 case DW_TAG_format_label
:
13077 return "DW_TAG_format_label";
13078 case DW_TAG_function_template
:
13079 return "DW_TAG_function_template";
13080 case DW_TAG_class_template
:
13081 return "DW_TAG_class_template";
13082 case DW_TAG_GNU_BINCL
:
13083 return "DW_TAG_GNU_BINCL";
13084 case DW_TAG_GNU_EINCL
:
13085 return "DW_TAG_GNU_EINCL";
13086 case DW_TAG_upc_shared_type
:
13087 return "DW_TAG_upc_shared_type";
13088 case DW_TAG_upc_strict_type
:
13089 return "DW_TAG_upc_strict_type";
13090 case DW_TAG_upc_relaxed_type
:
13091 return "DW_TAG_upc_relaxed_type";
13092 case DW_TAG_PGI_kanji_type
:
13093 return "DW_TAG_PGI_kanji_type";
13094 case DW_TAG_PGI_interface_block
:
13095 return "DW_TAG_PGI_interface_block";
13096 case DW_TAG_GNU_call_site
:
13097 return "DW_TAG_GNU_call_site";
13099 return "DW_TAG_<unknown>";
13103 /* Convert a DWARF attribute code into its string name. */
13106 dwarf_attr_name (unsigned attr
)
13110 case DW_AT_sibling
:
13111 return "DW_AT_sibling";
13112 case DW_AT_location
:
13113 return "DW_AT_location";
13115 return "DW_AT_name";
13116 case DW_AT_ordering
:
13117 return "DW_AT_ordering";
13118 case DW_AT_subscr_data
:
13119 return "DW_AT_subscr_data";
13120 case DW_AT_byte_size
:
13121 return "DW_AT_byte_size";
13122 case DW_AT_bit_offset
:
13123 return "DW_AT_bit_offset";
13124 case DW_AT_bit_size
:
13125 return "DW_AT_bit_size";
13126 case DW_AT_element_list
:
13127 return "DW_AT_element_list";
13128 case DW_AT_stmt_list
:
13129 return "DW_AT_stmt_list";
13131 return "DW_AT_low_pc";
13132 case DW_AT_high_pc
:
13133 return "DW_AT_high_pc";
13134 case DW_AT_language
:
13135 return "DW_AT_language";
13137 return "DW_AT_member";
13139 return "DW_AT_discr";
13140 case DW_AT_discr_value
:
13141 return "DW_AT_discr_value";
13142 case DW_AT_visibility
:
13143 return "DW_AT_visibility";
13145 return "DW_AT_import";
13146 case DW_AT_string_length
:
13147 return "DW_AT_string_length";
13148 case DW_AT_common_reference
:
13149 return "DW_AT_common_reference";
13150 case DW_AT_comp_dir
:
13151 return "DW_AT_comp_dir";
13152 case DW_AT_const_value
:
13153 return "DW_AT_const_value";
13154 case DW_AT_containing_type
:
13155 return "DW_AT_containing_type";
13156 case DW_AT_default_value
:
13157 return "DW_AT_default_value";
13159 return "DW_AT_inline";
13160 case DW_AT_is_optional
:
13161 return "DW_AT_is_optional";
13162 case DW_AT_lower_bound
:
13163 return "DW_AT_lower_bound";
13164 case DW_AT_producer
:
13165 return "DW_AT_producer";
13166 case DW_AT_prototyped
:
13167 return "DW_AT_prototyped";
13168 case DW_AT_return_addr
:
13169 return "DW_AT_return_addr";
13170 case DW_AT_start_scope
:
13171 return "DW_AT_start_scope";
13172 case DW_AT_bit_stride
:
13173 return "DW_AT_bit_stride";
13174 case DW_AT_upper_bound
:
13175 return "DW_AT_upper_bound";
13176 case DW_AT_abstract_origin
:
13177 return "DW_AT_abstract_origin";
13178 case DW_AT_accessibility
:
13179 return "DW_AT_accessibility";
13180 case DW_AT_address_class
:
13181 return "DW_AT_address_class";
13182 case DW_AT_artificial
:
13183 return "DW_AT_artificial";
13184 case DW_AT_base_types
:
13185 return "DW_AT_base_types";
13186 case DW_AT_calling_convention
:
13187 return "DW_AT_calling_convention";
13189 return "DW_AT_count";
13190 case DW_AT_data_member_location
:
13191 return "DW_AT_data_member_location";
13192 case DW_AT_decl_column
:
13193 return "DW_AT_decl_column";
13194 case DW_AT_decl_file
:
13195 return "DW_AT_decl_file";
13196 case DW_AT_decl_line
:
13197 return "DW_AT_decl_line";
13198 case DW_AT_declaration
:
13199 return "DW_AT_declaration";
13200 case DW_AT_discr_list
:
13201 return "DW_AT_discr_list";
13202 case DW_AT_encoding
:
13203 return "DW_AT_encoding";
13204 case DW_AT_external
:
13205 return "DW_AT_external";
13206 case DW_AT_frame_base
:
13207 return "DW_AT_frame_base";
13209 return "DW_AT_friend";
13210 case DW_AT_identifier_case
:
13211 return "DW_AT_identifier_case";
13212 case DW_AT_macro_info
:
13213 return "DW_AT_macro_info";
13214 case DW_AT_namelist_items
:
13215 return "DW_AT_namelist_items";
13216 case DW_AT_priority
:
13217 return "DW_AT_priority";
13218 case DW_AT_segment
:
13219 return "DW_AT_segment";
13220 case DW_AT_specification
:
13221 return "DW_AT_specification";
13222 case DW_AT_static_link
:
13223 return "DW_AT_static_link";
13225 return "DW_AT_type";
13226 case DW_AT_use_location
:
13227 return "DW_AT_use_location";
13228 case DW_AT_variable_parameter
:
13229 return "DW_AT_variable_parameter";
13230 case DW_AT_virtuality
:
13231 return "DW_AT_virtuality";
13232 case DW_AT_vtable_elem_location
:
13233 return "DW_AT_vtable_elem_location";
13234 /* DWARF 3 values. */
13235 case DW_AT_allocated
:
13236 return "DW_AT_allocated";
13237 case DW_AT_associated
:
13238 return "DW_AT_associated";
13239 case DW_AT_data_location
:
13240 return "DW_AT_data_location";
13241 case DW_AT_byte_stride
:
13242 return "DW_AT_byte_stride";
13243 case DW_AT_entry_pc
:
13244 return "DW_AT_entry_pc";
13245 case DW_AT_use_UTF8
:
13246 return "DW_AT_use_UTF8";
13247 case DW_AT_extension
:
13248 return "DW_AT_extension";
13250 return "DW_AT_ranges";
13251 case DW_AT_trampoline
:
13252 return "DW_AT_trampoline";
13253 case DW_AT_call_column
:
13254 return "DW_AT_call_column";
13255 case DW_AT_call_file
:
13256 return "DW_AT_call_file";
13257 case DW_AT_call_line
:
13258 return "DW_AT_call_line";
13259 case DW_AT_description
:
13260 return "DW_AT_description";
13261 case DW_AT_binary_scale
:
13262 return "DW_AT_binary_scale";
13263 case DW_AT_decimal_scale
:
13264 return "DW_AT_decimal_scale";
13266 return "DW_AT_small";
13267 case DW_AT_decimal_sign
:
13268 return "DW_AT_decimal_sign";
13269 case DW_AT_digit_count
:
13270 return "DW_AT_digit_count";
13271 case DW_AT_picture_string
:
13272 return "DW_AT_picture_string";
13273 case DW_AT_mutable
:
13274 return "DW_AT_mutable";
13275 case DW_AT_threads_scaled
:
13276 return "DW_AT_threads_scaled";
13277 case DW_AT_explicit
:
13278 return "DW_AT_explicit";
13279 case DW_AT_object_pointer
:
13280 return "DW_AT_object_pointer";
13281 case DW_AT_endianity
:
13282 return "DW_AT_endianity";
13283 case DW_AT_elemental
:
13284 return "DW_AT_elemental";
13286 return "DW_AT_pure";
13287 case DW_AT_recursive
:
13288 return "DW_AT_recursive";
13289 /* DWARF 4 values. */
13290 case DW_AT_signature
:
13291 return "DW_AT_signature";
13292 case DW_AT_linkage_name
:
13293 return "DW_AT_linkage_name";
13294 /* SGI/MIPS extensions. */
13295 #ifdef MIPS /* collides with DW_AT_HP_block_index */
13296 case DW_AT_MIPS_fde
:
13297 return "DW_AT_MIPS_fde";
13299 case DW_AT_MIPS_loop_begin
:
13300 return "DW_AT_MIPS_loop_begin";
13301 case DW_AT_MIPS_tail_loop_begin
:
13302 return "DW_AT_MIPS_tail_loop_begin";
13303 case DW_AT_MIPS_epilog_begin
:
13304 return "DW_AT_MIPS_epilog_begin";
13305 case DW_AT_MIPS_loop_unroll_factor
:
13306 return "DW_AT_MIPS_loop_unroll_factor";
13307 case DW_AT_MIPS_software_pipeline_depth
:
13308 return "DW_AT_MIPS_software_pipeline_depth";
13309 case DW_AT_MIPS_linkage_name
:
13310 return "DW_AT_MIPS_linkage_name";
13311 case DW_AT_MIPS_stride
:
13312 return "DW_AT_MIPS_stride";
13313 case DW_AT_MIPS_abstract_name
:
13314 return "DW_AT_MIPS_abstract_name";
13315 case DW_AT_MIPS_clone_origin
:
13316 return "DW_AT_MIPS_clone_origin";
13317 case DW_AT_MIPS_has_inlines
:
13318 return "DW_AT_MIPS_has_inlines";
13319 /* HP extensions. */
13320 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
13321 case DW_AT_HP_block_index
:
13322 return "DW_AT_HP_block_index";
13324 case DW_AT_HP_unmodifiable
:
13325 return "DW_AT_HP_unmodifiable";
13326 case DW_AT_HP_actuals_stmt_list
:
13327 return "DW_AT_HP_actuals_stmt_list";
13328 case DW_AT_HP_proc_per_section
:
13329 return "DW_AT_HP_proc_per_section";
13330 case DW_AT_HP_raw_data_ptr
:
13331 return "DW_AT_HP_raw_data_ptr";
13332 case DW_AT_HP_pass_by_reference
:
13333 return "DW_AT_HP_pass_by_reference";
13334 case DW_AT_HP_opt_level
:
13335 return "DW_AT_HP_opt_level";
13336 case DW_AT_HP_prof_version_id
:
13337 return "DW_AT_HP_prof_version_id";
13338 case DW_AT_HP_opt_flags
:
13339 return "DW_AT_HP_opt_flags";
13340 case DW_AT_HP_cold_region_low_pc
:
13341 return "DW_AT_HP_cold_region_low_pc";
13342 case DW_AT_HP_cold_region_high_pc
:
13343 return "DW_AT_HP_cold_region_high_pc";
13344 case DW_AT_HP_all_variables_modifiable
:
13345 return "DW_AT_HP_all_variables_modifiable";
13346 case DW_AT_HP_linkage_name
:
13347 return "DW_AT_HP_linkage_name";
13348 case DW_AT_HP_prof_flags
:
13349 return "DW_AT_HP_prof_flags";
13350 /* GNU extensions. */
13351 case DW_AT_sf_names
:
13352 return "DW_AT_sf_names";
13353 case DW_AT_src_info
:
13354 return "DW_AT_src_info";
13355 case DW_AT_mac_info
:
13356 return "DW_AT_mac_info";
13357 case DW_AT_src_coords
:
13358 return "DW_AT_src_coords";
13359 case DW_AT_body_begin
:
13360 return "DW_AT_body_begin";
13361 case DW_AT_body_end
:
13362 return "DW_AT_body_end";
13363 case DW_AT_GNU_vector
:
13364 return "DW_AT_GNU_vector";
13365 case DW_AT_GNU_odr_signature
:
13366 return "DW_AT_GNU_odr_signature";
13367 /* VMS extensions. */
13368 case DW_AT_VMS_rtnbeg_pd_address
:
13369 return "DW_AT_VMS_rtnbeg_pd_address";
13370 /* UPC extension. */
13371 case DW_AT_upc_threads_scaled
:
13372 return "DW_AT_upc_threads_scaled";
13373 /* PGI (STMicroelectronics) extensions. */
13374 case DW_AT_PGI_lbase
:
13375 return "DW_AT_PGI_lbase";
13376 case DW_AT_PGI_soffset
:
13377 return "DW_AT_PGI_soffset";
13378 case DW_AT_PGI_lstride
:
13379 return "DW_AT_PGI_lstride";
13381 return "DW_AT_<unknown>";
13385 /* Convert a DWARF value form code into its string name. */
13388 dwarf_form_name (unsigned form
)
13393 return "DW_FORM_addr";
13394 case DW_FORM_block2
:
13395 return "DW_FORM_block2";
13396 case DW_FORM_block4
:
13397 return "DW_FORM_block4";
13398 case DW_FORM_data2
:
13399 return "DW_FORM_data2";
13400 case DW_FORM_data4
:
13401 return "DW_FORM_data4";
13402 case DW_FORM_data8
:
13403 return "DW_FORM_data8";
13404 case DW_FORM_string
:
13405 return "DW_FORM_string";
13406 case DW_FORM_block
:
13407 return "DW_FORM_block";
13408 case DW_FORM_block1
:
13409 return "DW_FORM_block1";
13410 case DW_FORM_data1
:
13411 return "DW_FORM_data1";
13413 return "DW_FORM_flag";
13414 case DW_FORM_sdata
:
13415 return "DW_FORM_sdata";
13417 return "DW_FORM_strp";
13418 case DW_FORM_udata
:
13419 return "DW_FORM_udata";
13420 case DW_FORM_ref_addr
:
13421 return "DW_FORM_ref_addr";
13423 return "DW_FORM_ref1";
13425 return "DW_FORM_ref2";
13427 return "DW_FORM_ref4";
13429 return "DW_FORM_ref8";
13430 case DW_FORM_ref_udata
:
13431 return "DW_FORM_ref_udata";
13432 case DW_FORM_indirect
:
13433 return "DW_FORM_indirect";
13434 case DW_FORM_sec_offset
:
13435 return "DW_FORM_sec_offset";
13436 case DW_FORM_exprloc
:
13437 return "DW_FORM_exprloc";
13438 case DW_FORM_flag_present
:
13439 return "DW_FORM_flag_present";
13440 case DW_FORM_ref_sig8
:
13441 return "DW_FORM_ref_sig8";
13443 return "DW_FORM_<unknown>";
13447 /* Convert a DWARF stack opcode into its string name. */
13450 dwarf_stack_op_name (unsigned op
)
13455 return "DW_OP_addr";
13457 return "DW_OP_deref";
13458 case DW_OP_const1u
:
13459 return "DW_OP_const1u";
13460 case DW_OP_const1s
:
13461 return "DW_OP_const1s";
13462 case DW_OP_const2u
:
13463 return "DW_OP_const2u";
13464 case DW_OP_const2s
:
13465 return "DW_OP_const2s";
13466 case DW_OP_const4u
:
13467 return "DW_OP_const4u";
13468 case DW_OP_const4s
:
13469 return "DW_OP_const4s";
13470 case DW_OP_const8u
:
13471 return "DW_OP_const8u";
13472 case DW_OP_const8s
:
13473 return "DW_OP_const8s";
13475 return "DW_OP_constu";
13477 return "DW_OP_consts";
13479 return "DW_OP_dup";
13481 return "DW_OP_drop";
13483 return "DW_OP_over";
13485 return "DW_OP_pick";
13487 return "DW_OP_swap";
13489 return "DW_OP_rot";
13491 return "DW_OP_xderef";
13493 return "DW_OP_abs";
13495 return "DW_OP_and";
13497 return "DW_OP_div";
13499 return "DW_OP_minus";
13501 return "DW_OP_mod";
13503 return "DW_OP_mul";
13505 return "DW_OP_neg";
13507 return "DW_OP_not";
13511 return "DW_OP_plus";
13512 case DW_OP_plus_uconst
:
13513 return "DW_OP_plus_uconst";
13515 return "DW_OP_shl";
13517 return "DW_OP_shr";
13519 return "DW_OP_shra";
13521 return "DW_OP_xor";
13523 return "DW_OP_bra";
13537 return "DW_OP_skip";
13539 return "DW_OP_lit0";
13541 return "DW_OP_lit1";
13543 return "DW_OP_lit2";
13545 return "DW_OP_lit3";
13547 return "DW_OP_lit4";
13549 return "DW_OP_lit5";
13551 return "DW_OP_lit6";
13553 return "DW_OP_lit7";
13555 return "DW_OP_lit8";
13557 return "DW_OP_lit9";
13559 return "DW_OP_lit10";
13561 return "DW_OP_lit11";
13563 return "DW_OP_lit12";
13565 return "DW_OP_lit13";
13567 return "DW_OP_lit14";
13569 return "DW_OP_lit15";
13571 return "DW_OP_lit16";
13573 return "DW_OP_lit17";
13575 return "DW_OP_lit18";
13577 return "DW_OP_lit19";
13579 return "DW_OP_lit20";
13581 return "DW_OP_lit21";
13583 return "DW_OP_lit22";
13585 return "DW_OP_lit23";
13587 return "DW_OP_lit24";
13589 return "DW_OP_lit25";
13591 return "DW_OP_lit26";
13593 return "DW_OP_lit27";
13595 return "DW_OP_lit28";
13597 return "DW_OP_lit29";
13599 return "DW_OP_lit30";
13601 return "DW_OP_lit31";
13603 return "DW_OP_reg0";
13605 return "DW_OP_reg1";
13607 return "DW_OP_reg2";
13609 return "DW_OP_reg3";
13611 return "DW_OP_reg4";
13613 return "DW_OP_reg5";
13615 return "DW_OP_reg6";
13617 return "DW_OP_reg7";
13619 return "DW_OP_reg8";
13621 return "DW_OP_reg9";
13623 return "DW_OP_reg10";
13625 return "DW_OP_reg11";
13627 return "DW_OP_reg12";
13629 return "DW_OP_reg13";
13631 return "DW_OP_reg14";
13633 return "DW_OP_reg15";
13635 return "DW_OP_reg16";
13637 return "DW_OP_reg17";
13639 return "DW_OP_reg18";
13641 return "DW_OP_reg19";
13643 return "DW_OP_reg20";
13645 return "DW_OP_reg21";
13647 return "DW_OP_reg22";
13649 return "DW_OP_reg23";
13651 return "DW_OP_reg24";
13653 return "DW_OP_reg25";
13655 return "DW_OP_reg26";
13657 return "DW_OP_reg27";
13659 return "DW_OP_reg28";
13661 return "DW_OP_reg29";
13663 return "DW_OP_reg30";
13665 return "DW_OP_reg31";
13667 return "DW_OP_breg0";
13669 return "DW_OP_breg1";
13671 return "DW_OP_breg2";
13673 return "DW_OP_breg3";
13675 return "DW_OP_breg4";
13677 return "DW_OP_breg5";
13679 return "DW_OP_breg6";
13681 return "DW_OP_breg7";
13683 return "DW_OP_breg8";
13685 return "DW_OP_breg9";
13687 return "DW_OP_breg10";
13689 return "DW_OP_breg11";
13691 return "DW_OP_breg12";
13693 return "DW_OP_breg13";
13695 return "DW_OP_breg14";
13697 return "DW_OP_breg15";
13699 return "DW_OP_breg16";
13701 return "DW_OP_breg17";
13703 return "DW_OP_breg18";
13705 return "DW_OP_breg19";
13707 return "DW_OP_breg20";
13709 return "DW_OP_breg21";
13711 return "DW_OP_breg22";
13713 return "DW_OP_breg23";
13715 return "DW_OP_breg24";
13717 return "DW_OP_breg25";
13719 return "DW_OP_breg26";
13721 return "DW_OP_breg27";
13723 return "DW_OP_breg28";
13725 return "DW_OP_breg29";
13727 return "DW_OP_breg30";
13729 return "DW_OP_breg31";
13731 return "DW_OP_regx";
13733 return "DW_OP_fbreg";
13735 return "DW_OP_bregx";
13737 return "DW_OP_piece";
13738 case DW_OP_deref_size
:
13739 return "DW_OP_deref_size";
13740 case DW_OP_xderef_size
:
13741 return "DW_OP_xderef_size";
13743 return "DW_OP_nop";
13744 /* DWARF 3 extensions. */
13745 case DW_OP_push_object_address
:
13746 return "DW_OP_push_object_address";
13748 return "DW_OP_call2";
13750 return "DW_OP_call4";
13751 case DW_OP_call_ref
:
13752 return "DW_OP_call_ref";
13753 case DW_OP_form_tls_address
:
13754 return "DW_OP_form_tls_address";
13755 case DW_OP_call_frame_cfa
:
13756 return "DW_OP_call_frame_cfa";
13757 case DW_OP_bit_piece
:
13758 return "DW_OP_bit_piece";
13759 /* DWARF 4 extensions. */
13760 case DW_OP_implicit_value
:
13761 return "DW_OP_implicit_value";
13762 case DW_OP_stack_value
:
13763 return "DW_OP_stack_value";
13764 /* GNU extensions. */
13765 case DW_OP_GNU_push_tls_address
:
13766 return "DW_OP_GNU_push_tls_address";
13767 case DW_OP_GNU_uninit
:
13768 return "DW_OP_GNU_uninit";
13769 case DW_OP_GNU_encoded_addr
:
13770 return "DW_OP_GNU_encoded_addr";
13771 case DW_OP_GNU_implicit_pointer
:
13772 return "DW_OP_GNU_implicit_pointer";
13773 case DW_OP_GNU_entry_value
:
13774 return "DW_OP_GNU_entry_value";
13775 case DW_OP_GNU_const_type
:
13776 return "DW_OP_GNU_const_type";
13777 case DW_OP_GNU_regval_type
:
13778 return "DW_OP_GNU_regval_type";
13779 case DW_OP_GNU_deref_type
:
13780 return "DW_OP_GNU_deref_type";
13781 case DW_OP_GNU_convert
:
13782 return "DW_OP_GNU_convert";
13783 case DW_OP_GNU_reinterpret
:
13784 return "DW_OP_GNU_reinterpret";
13785 case DW_OP_GNU_parameter_ref
:
13786 return "DW_OP_GNU_parameter_ref";
13793 dwarf_bool_name (unsigned mybool
)
13801 /* Convert a DWARF type code into its string name. */
13804 dwarf_type_encoding_name (unsigned enc
)
13809 return "DW_ATE_void";
13810 case DW_ATE_address
:
13811 return "DW_ATE_address";
13812 case DW_ATE_boolean
:
13813 return "DW_ATE_boolean";
13814 case DW_ATE_complex_float
:
13815 return "DW_ATE_complex_float";
13817 return "DW_ATE_float";
13818 case DW_ATE_signed
:
13819 return "DW_ATE_signed";
13820 case DW_ATE_signed_char
:
13821 return "DW_ATE_signed_char";
13822 case DW_ATE_unsigned
:
13823 return "DW_ATE_unsigned";
13824 case DW_ATE_unsigned_char
:
13825 return "DW_ATE_unsigned_char";
13827 case DW_ATE_imaginary_float
:
13828 return "DW_ATE_imaginary_float";
13829 case DW_ATE_packed_decimal
:
13830 return "DW_ATE_packed_decimal";
13831 case DW_ATE_numeric_string
:
13832 return "DW_ATE_numeric_string";
13833 case DW_ATE_edited
:
13834 return "DW_ATE_edited";
13835 case DW_ATE_signed_fixed
:
13836 return "DW_ATE_signed_fixed";
13837 case DW_ATE_unsigned_fixed
:
13838 return "DW_ATE_unsigned_fixed";
13839 case DW_ATE_decimal_float
:
13840 return "DW_ATE_decimal_float";
13843 return "DW_ATE_UTF";
13844 /* HP extensions. */
13845 case DW_ATE_HP_float80
:
13846 return "DW_ATE_HP_float80";
13847 case DW_ATE_HP_complex_float80
:
13848 return "DW_ATE_HP_complex_float80";
13849 case DW_ATE_HP_float128
:
13850 return "DW_ATE_HP_float128";
13851 case DW_ATE_HP_complex_float128
:
13852 return "DW_ATE_HP_complex_float128";
13853 case DW_ATE_HP_floathpintel
:
13854 return "DW_ATE_HP_floathpintel";
13855 case DW_ATE_HP_imaginary_float80
:
13856 return "DW_ATE_HP_imaginary_float80";
13857 case DW_ATE_HP_imaginary_float128
:
13858 return "DW_ATE_HP_imaginary_float128";
13860 return "DW_ATE_<unknown>";
13864 /* Convert a DWARF call frame info operation to its string name. */
13868 dwarf_cfi_name (unsigned cfi_opc
)
13872 case DW_CFA_advance_loc
:
13873 return "DW_CFA_advance_loc";
13874 case DW_CFA_offset
:
13875 return "DW_CFA_offset";
13876 case DW_CFA_restore
:
13877 return "DW_CFA_restore";
13879 return "DW_CFA_nop";
13880 case DW_CFA_set_loc
:
13881 return "DW_CFA_set_loc";
13882 case DW_CFA_advance_loc1
:
13883 return "DW_CFA_advance_loc1";
13884 case DW_CFA_advance_loc2
:
13885 return "DW_CFA_advance_loc2";
13886 case DW_CFA_advance_loc4
:
13887 return "DW_CFA_advance_loc4";
13888 case DW_CFA_offset_extended
:
13889 return "DW_CFA_offset_extended";
13890 case DW_CFA_restore_extended
:
13891 return "DW_CFA_restore_extended";
13892 case DW_CFA_undefined
:
13893 return "DW_CFA_undefined";
13894 case DW_CFA_same_value
:
13895 return "DW_CFA_same_value";
13896 case DW_CFA_register
:
13897 return "DW_CFA_register";
13898 case DW_CFA_remember_state
:
13899 return "DW_CFA_remember_state";
13900 case DW_CFA_restore_state
:
13901 return "DW_CFA_restore_state";
13902 case DW_CFA_def_cfa
:
13903 return "DW_CFA_def_cfa";
13904 case DW_CFA_def_cfa_register
:
13905 return "DW_CFA_def_cfa_register";
13906 case DW_CFA_def_cfa_offset
:
13907 return "DW_CFA_def_cfa_offset";
13909 case DW_CFA_def_cfa_expression
:
13910 return "DW_CFA_def_cfa_expression";
13911 case DW_CFA_expression
:
13912 return "DW_CFA_expression";
13913 case DW_CFA_offset_extended_sf
:
13914 return "DW_CFA_offset_extended_sf";
13915 case DW_CFA_def_cfa_sf
:
13916 return "DW_CFA_def_cfa_sf";
13917 case DW_CFA_def_cfa_offset_sf
:
13918 return "DW_CFA_def_cfa_offset_sf";
13919 case DW_CFA_val_offset
:
13920 return "DW_CFA_val_offset";
13921 case DW_CFA_val_offset_sf
:
13922 return "DW_CFA_val_offset_sf";
13923 case DW_CFA_val_expression
:
13924 return "DW_CFA_val_expression";
13925 /* SGI/MIPS specific. */
13926 case DW_CFA_MIPS_advance_loc8
:
13927 return "DW_CFA_MIPS_advance_loc8";
13928 /* GNU extensions. */
13929 case DW_CFA_GNU_window_save
:
13930 return "DW_CFA_GNU_window_save";
13931 case DW_CFA_GNU_args_size
:
13932 return "DW_CFA_GNU_args_size";
13933 case DW_CFA_GNU_negative_offset_extended
:
13934 return "DW_CFA_GNU_negative_offset_extended";
13936 return "DW_CFA_<unknown>";
13942 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
13946 print_spaces (indent
, f
);
13947 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
13948 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
13950 if (die
->parent
!= NULL
)
13952 print_spaces (indent
, f
);
13953 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
13954 die
->parent
->offset
.sect_off
);
13957 print_spaces (indent
, f
);
13958 fprintf_unfiltered (f
, " has children: %s\n",
13959 dwarf_bool_name (die
->child
!= NULL
));
13961 print_spaces (indent
, f
);
13962 fprintf_unfiltered (f
, " attributes:\n");
13964 for (i
= 0; i
< die
->num_attrs
; ++i
)
13966 print_spaces (indent
, f
);
13967 fprintf_unfiltered (f
, " %s (%s) ",
13968 dwarf_attr_name (die
->attrs
[i
].name
),
13969 dwarf_form_name (die
->attrs
[i
].form
));
13971 switch (die
->attrs
[i
].form
)
13973 case DW_FORM_ref_addr
:
13975 fprintf_unfiltered (f
, "address: ");
13976 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
13978 case DW_FORM_block2
:
13979 case DW_FORM_block4
:
13980 case DW_FORM_block
:
13981 case DW_FORM_block1
:
13982 fprintf_unfiltered (f
, "block: size %d",
13983 DW_BLOCK (&die
->attrs
[i
])->size
);
13985 case DW_FORM_exprloc
:
13986 fprintf_unfiltered (f
, "expression: size %u",
13987 DW_BLOCK (&die
->attrs
[i
])->size
);
13992 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
13993 (long) (DW_ADDR (&die
->attrs
[i
])));
13995 case DW_FORM_data1
:
13996 case DW_FORM_data2
:
13997 case DW_FORM_data4
:
13998 case DW_FORM_data8
:
13999 case DW_FORM_udata
:
14000 case DW_FORM_sdata
:
14001 fprintf_unfiltered (f
, "constant: %s",
14002 pulongest (DW_UNSND (&die
->attrs
[i
])));
14004 case DW_FORM_sec_offset
:
14005 fprintf_unfiltered (f
, "section offset: %s",
14006 pulongest (DW_UNSND (&die
->attrs
[i
])));
14008 case DW_FORM_ref_sig8
:
14009 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
14010 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
14011 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->per_cu
.offset
.sect_off
);
14013 fprintf_unfiltered (f
, "signatured type, offset: unknown");
14015 case DW_FORM_string
:
14017 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
14018 DW_STRING (&die
->attrs
[i
])
14019 ? DW_STRING (&die
->attrs
[i
]) : "",
14020 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
14023 if (DW_UNSND (&die
->attrs
[i
]))
14024 fprintf_unfiltered (f
, "flag: TRUE");
14026 fprintf_unfiltered (f
, "flag: FALSE");
14028 case DW_FORM_flag_present
:
14029 fprintf_unfiltered (f
, "flag: TRUE");
14031 case DW_FORM_indirect
:
14032 /* The reader will have reduced the indirect form to
14033 the "base form" so this form should not occur. */
14034 fprintf_unfiltered (f
,
14035 "unexpected attribute form: DW_FORM_indirect");
14038 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
14039 die
->attrs
[i
].form
);
14042 fprintf_unfiltered (f
, "\n");
14047 dump_die_for_error (struct die_info
*die
)
14049 dump_die_shallow (gdb_stderr
, 0, die
);
14053 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
14055 int indent
= level
* 4;
14057 gdb_assert (die
!= NULL
);
14059 if (level
>= max_level
)
14062 dump_die_shallow (f
, indent
, die
);
14064 if (die
->child
!= NULL
)
14066 print_spaces (indent
, f
);
14067 fprintf_unfiltered (f
, " Children:");
14068 if (level
+ 1 < max_level
)
14070 fprintf_unfiltered (f
, "\n");
14071 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
14075 fprintf_unfiltered (f
,
14076 " [not printed, max nesting level reached]\n");
14080 if (die
->sibling
!= NULL
&& level
> 0)
14082 dump_die_1 (f
, level
, max_level
, die
->sibling
);
14086 /* This is called from the pdie macro in gdbinit.in.
14087 It's not static so gcc will keep a copy callable from gdb. */
14090 dump_die (struct die_info
*die
, int max_level
)
14092 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
14096 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
14100 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
14106 /* DW_ADDR is always stored already as sect_offset; despite for the forms
14107 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
14110 is_ref_attr (struct attribute
*attr
)
14112 switch (attr
->form
)
14114 case DW_FORM_ref_addr
:
14119 case DW_FORM_ref_udata
:
14126 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
14130 dwarf2_get_ref_die_offset (struct attribute
*attr
)
14132 sect_offset retval
= { DW_ADDR (attr
) };
14134 if (is_ref_attr (attr
))
14137 retval
.sect_off
= 0;
14138 complaint (&symfile_complaints
,
14139 _("unsupported die ref attribute form: '%s'"),
14140 dwarf_form_name (attr
->form
));
14144 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
14145 * the value held by the attribute is not constant. */
14148 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
14150 if (attr
->form
== DW_FORM_sdata
)
14151 return DW_SND (attr
);
14152 else if (attr
->form
== DW_FORM_udata
14153 || attr
->form
== DW_FORM_data1
14154 || attr
->form
== DW_FORM_data2
14155 || attr
->form
== DW_FORM_data4
14156 || attr
->form
== DW_FORM_data8
)
14157 return DW_UNSND (attr
);
14160 complaint (&symfile_complaints
,
14161 _("Attribute value is not a constant (%s)"),
14162 dwarf_form_name (attr
->form
));
14163 return default_value
;
14167 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
14168 unit and add it to our queue.
14169 The result is non-zero if PER_CU was queued, otherwise the result is zero
14170 meaning either PER_CU is already queued or it is already loaded. */
14173 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
14174 struct dwarf2_per_cu_data
*per_cu
)
14176 /* We may arrive here during partial symbol reading, if we need full
14177 DIEs to process an unusual case (e.g. template arguments). Do
14178 not queue PER_CU, just tell our caller to load its DIEs. */
14179 if (dwarf2_per_objfile
->reading_partial_symbols
)
14181 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
14186 /* Mark the dependence relation so that we don't flush PER_CU
14188 dwarf2_add_dependence (this_cu
, per_cu
);
14190 /* If it's already on the queue, we have nothing to do. */
14191 if (per_cu
->queued
)
14194 /* If the compilation unit is already loaded, just mark it as
14196 if (per_cu
->cu
!= NULL
)
14198 per_cu
->cu
->last_used
= 0;
14202 /* Add it to the queue. */
14203 queue_comp_unit (per_cu
);
14208 /* Follow reference or signature attribute ATTR of SRC_DIE.
14209 On entry *REF_CU is the CU of SRC_DIE.
14210 On exit *REF_CU is the CU of the result. */
14212 static struct die_info
*
14213 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
14214 struct dwarf2_cu
**ref_cu
)
14216 struct die_info
*die
;
14218 if (is_ref_attr (attr
))
14219 die
= follow_die_ref (src_die
, attr
, ref_cu
);
14220 else if (attr
->form
== DW_FORM_ref_sig8
)
14221 die
= follow_die_sig (src_die
, attr
, ref_cu
);
14224 dump_die_for_error (src_die
);
14225 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
14226 (*ref_cu
)->objfile
->name
);
14232 /* Follow reference OFFSET.
14233 On entry *REF_CU is the CU of the source die referencing OFFSET.
14234 On exit *REF_CU is the CU of the result.
14235 Returns NULL if OFFSET is invalid. */
14237 static struct die_info
*
14238 follow_die_offset (sect_offset offset
, struct dwarf2_cu
**ref_cu
)
14240 struct die_info temp_die
;
14241 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
14243 gdb_assert (cu
->per_cu
!= NULL
);
14247 if (cu
->per_cu
->debug_types_section
)
14249 /* .debug_types CUs cannot reference anything outside their CU.
14250 If they need to, they have to reference a signatured type via
14251 DW_FORM_ref_sig8. */
14252 if (! offset_in_cu_p (&cu
->header
, offset
))
14255 else if (! offset_in_cu_p (&cu
->header
, offset
))
14257 struct dwarf2_per_cu_data
*per_cu
;
14259 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
14261 /* If necessary, add it to the queue and load its DIEs. */
14262 if (maybe_queue_comp_unit (cu
, per_cu
))
14263 load_full_comp_unit (per_cu
);
14265 target_cu
= per_cu
->cu
;
14267 else if (cu
->dies
== NULL
)
14269 /* We're loading full DIEs during partial symbol reading. */
14270 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
14271 load_full_comp_unit (cu
->per_cu
);
14274 *ref_cu
= target_cu
;
14275 temp_die
.offset
= offset
;
14276 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
14279 /* Follow reference attribute ATTR of SRC_DIE.
14280 On entry *REF_CU is the CU of SRC_DIE.
14281 On exit *REF_CU is the CU of the result. */
14283 static struct die_info
*
14284 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
14285 struct dwarf2_cu
**ref_cu
)
14287 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
14288 struct dwarf2_cu
*cu
= *ref_cu
;
14289 struct die_info
*die
;
14291 die
= follow_die_offset (offset
, ref_cu
);
14293 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
14294 "at 0x%x [in module %s]"),
14295 offset
.sect_off
, src_die
->offset
.sect_off
, cu
->objfile
->name
);
14300 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
14301 Returned value is intended for DW_OP_call*. Returned
14302 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
14304 struct dwarf2_locexpr_baton
14305 dwarf2_fetch_die_location_block (cu_offset offset_in_cu
,
14306 struct dwarf2_per_cu_data
*per_cu
,
14307 CORE_ADDR (*get_frame_pc
) (void *baton
),
14310 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
14311 struct dwarf2_cu
*cu
;
14312 struct die_info
*die
;
14313 struct attribute
*attr
;
14314 struct dwarf2_locexpr_baton retval
;
14316 dw2_setup (per_cu
->objfile
);
14318 if (per_cu
->cu
== NULL
)
14322 die
= follow_die_offset (offset
, &cu
);
14324 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
14325 offset
.sect_off
, per_cu
->objfile
->name
);
14327 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
14330 /* DWARF: "If there is no such attribute, then there is no effect.".
14331 DATA is ignored if SIZE is 0. */
14333 retval
.data
= NULL
;
14336 else if (attr_form_is_section_offset (attr
))
14338 struct dwarf2_loclist_baton loclist_baton
;
14339 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
14342 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
14344 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
14346 retval
.size
= size
;
14350 if (!attr_form_is_block (attr
))
14351 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
14352 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
14353 offset
.sect_off
, per_cu
->objfile
->name
);
14355 retval
.data
= DW_BLOCK (attr
)->data
;
14356 retval
.size
= DW_BLOCK (attr
)->size
;
14358 retval
.per_cu
= cu
->per_cu
;
14360 age_cached_comp_units ();
14365 /* Return the type of the DIE at DIE_OFFSET in the CU named by
14369 dwarf2_get_die_type (cu_offset die_offset
,
14370 struct dwarf2_per_cu_data
*per_cu
)
14372 sect_offset die_offset_sect
;
14374 dw2_setup (per_cu
->objfile
);
14376 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
14377 return get_die_type_at_offset (die_offset_sect
, per_cu
);
14380 /* Follow the signature attribute ATTR in SRC_DIE.
14381 On entry *REF_CU is the CU of SRC_DIE.
14382 On exit *REF_CU is the CU of the result. */
14384 static struct die_info
*
14385 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
14386 struct dwarf2_cu
**ref_cu
)
14388 struct objfile
*objfile
= (*ref_cu
)->objfile
;
14389 struct die_info temp_die
;
14390 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
14391 struct dwarf2_cu
*sig_cu
;
14392 struct die_info
*die
;
14394 /* sig_type will be NULL if the signatured type is missing from
14396 if (sig_type
== NULL
)
14397 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
14398 "at 0x%x [in module %s]"),
14399 src_die
->offset
.sect_off
, objfile
->name
);
14401 /* If necessary, add it to the queue and load its DIEs. */
14403 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
14404 read_signatured_type (sig_type
);
14406 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
14408 sig_cu
= sig_type
->per_cu
.cu
;
14409 temp_die
.offset
.sect_off
= (sig_type
->per_cu
.offset
.sect_off
14410 + sig_type
->type_offset
.cu_off
);
14411 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
14412 temp_die
.offset
.sect_off
);
14419 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
14420 "from DIE at 0x%x [in module %s]"),
14421 temp_die
.offset
.sect_off
, src_die
->offset
.sect_off
, objfile
->name
);
14424 /* Given an offset of a signatured type, return its signatured_type. */
14426 static struct signatured_type
*
14427 lookup_signatured_type_at_offset (struct objfile
*objfile
,
14428 struct dwarf2_section_info
*section
,
14429 sect_offset offset
)
14431 gdb_byte
*info_ptr
= section
->buffer
+ offset
.sect_off
;
14432 unsigned int length
, initial_length_size
;
14433 unsigned int sig_offset
;
14434 struct signatured_type find_entry
, *sig_type
;
14436 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
14437 sig_offset
= (initial_length_size
14439 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
14440 + 1 /*address_size*/);
14441 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
14442 sig_type
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
14444 /* This is only used to lookup previously recorded types.
14445 If we didn't find it, it's our bug. */
14446 gdb_assert (sig_type
!= NULL
);
14447 gdb_assert (offset
.sect_off
== sig_type
->per_cu
.offset
.sect_off
);
14452 /* Load the DIEs associated with type unit PER_CU into memory. */
14455 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
14457 struct objfile
*objfile
= per_cu
->objfile
;
14458 struct dwarf2_section_info
*sect
= per_cu
->debug_types_section
;
14459 sect_offset offset
= per_cu
->offset
;
14460 struct signatured_type
*sig_type
;
14462 dwarf2_read_section (objfile
, sect
);
14464 /* We have the section offset, but we need the signature to do the
14465 hash table lookup. */
14466 /* FIXME: This is sorta unnecessary, read_signatured_type only uses
14467 the signature to assert we found the right one.
14468 Ok, but it's a lot of work. We should simplify things so any needed
14469 assert doesn't require all this clumsiness. */
14470 sig_type
= lookup_signatured_type_at_offset (objfile
, sect
, offset
);
14472 gdb_assert (sig_type
->per_cu
.cu
== NULL
);
14474 read_signatured_type (sig_type
);
14476 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
14479 /* Read in a signatured type and build its CU and DIEs. */
14482 read_signatured_type (struct signatured_type
*sig_type
)
14484 struct objfile
*objfile
= sig_type
->per_cu
.objfile
;
14485 gdb_byte
*types_ptr
;
14486 struct die_reader_specs reader_specs
;
14487 struct dwarf2_cu
*cu
;
14488 ULONGEST signature
;
14489 struct cleanup
*back_to
, *free_cu_cleanup
;
14490 struct dwarf2_section_info
*section
= sig_type
->per_cu
.debug_types_section
;
14492 dwarf2_read_section (objfile
, section
);
14493 types_ptr
= section
->buffer
+ sig_type
->per_cu
.offset
.sect_off
;
14495 gdb_assert (sig_type
->per_cu
.cu
== NULL
);
14497 cu
= xmalloc (sizeof (*cu
));
14498 init_one_comp_unit (cu
, &sig_type
->per_cu
);
14500 /* If an error occurs while loading, release our storage. */
14501 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
14503 types_ptr
= read_and_check_type_unit_head (&cu
->header
, section
, types_ptr
,
14505 gdb_assert (signature
== sig_type
->signature
);
14508 = htab_create_alloc_ex (cu
->header
.length
/ 12,
14512 &cu
->comp_unit_obstack
,
14513 hashtab_obstack_allocate
,
14514 dummy_obstack_deallocate
);
14516 dwarf2_read_abbrevs (cu
);
14517 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
14519 init_cu_die_reader (&reader_specs
, cu
);
14521 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
14524 /* We try not to read any attributes in this function, because not
14525 all CUs needed for references have been loaded yet, and symbol
14526 table processing isn't initialized. But we have to set the CU language,
14527 or we won't be able to build types correctly. */
14528 prepare_one_comp_unit (cu
, cu
->dies
);
14530 do_cleanups (back_to
);
14532 /* We've successfully allocated this compilation unit. Let our caller
14533 clean it up when finished with it. */
14534 discard_cleanups (free_cu_cleanup
);
14536 /* Link this TU into read_in_chain. */
14537 sig_type
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
14538 dwarf2_per_objfile
->read_in_chain
= &sig_type
->per_cu
;
14541 /* Decode simple location descriptions.
14542 Given a pointer to a dwarf block that defines a location, compute
14543 the location and return the value.
14545 NOTE drow/2003-11-18: This function is called in two situations
14546 now: for the address of static or global variables (partial symbols
14547 only) and for offsets into structures which are expected to be
14548 (more or less) constant. The partial symbol case should go away,
14549 and only the constant case should remain. That will let this
14550 function complain more accurately. A few special modes are allowed
14551 without complaint for global variables (for instance, global
14552 register values and thread-local values).
14554 A location description containing no operations indicates that the
14555 object is optimized out. The return value is 0 for that case.
14556 FIXME drow/2003-11-16: No callers check for this case any more; soon all
14557 callers will only want a very basic result and this can become a
14560 Note that stack[0] is unused except as a default error return. */
14563 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
14565 struct objfile
*objfile
= cu
->objfile
;
14567 int size
= blk
->size
;
14568 gdb_byte
*data
= blk
->data
;
14569 CORE_ADDR stack
[64];
14571 unsigned int bytes_read
, unsnd
;
14577 stack
[++stacki
] = 0;
14616 stack
[++stacki
] = op
- DW_OP_lit0
;
14651 stack
[++stacki
] = op
- DW_OP_reg0
;
14653 dwarf2_complex_location_expr_complaint ();
14657 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
14659 stack
[++stacki
] = unsnd
;
14661 dwarf2_complex_location_expr_complaint ();
14665 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
14670 case DW_OP_const1u
:
14671 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
14675 case DW_OP_const1s
:
14676 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
14680 case DW_OP_const2u
:
14681 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
14685 case DW_OP_const2s
:
14686 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
14690 case DW_OP_const4u
:
14691 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
14695 case DW_OP_const4s
:
14696 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
14700 case DW_OP_const8u
:
14701 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
14706 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
14712 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
14717 stack
[stacki
+ 1] = stack
[stacki
];
14722 stack
[stacki
- 1] += stack
[stacki
];
14726 case DW_OP_plus_uconst
:
14727 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
14733 stack
[stacki
- 1] -= stack
[stacki
];
14738 /* If we're not the last op, then we definitely can't encode
14739 this using GDB's address_class enum. This is valid for partial
14740 global symbols, although the variable's address will be bogus
14743 dwarf2_complex_location_expr_complaint ();
14746 case DW_OP_GNU_push_tls_address
:
14747 /* The top of the stack has the offset from the beginning
14748 of the thread control block at which the variable is located. */
14749 /* Nothing should follow this operator, so the top of stack would
14751 /* This is valid for partial global symbols, but the variable's
14752 address will be bogus in the psymtab. Make it always at least
14753 non-zero to not look as a variable garbage collected by linker
14754 which have DW_OP_addr 0. */
14756 dwarf2_complex_location_expr_complaint ();
14760 case DW_OP_GNU_uninit
:
14765 const char *name
= dwarf_stack_op_name (op
);
14768 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
14771 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
14775 return (stack
[stacki
]);
14778 /* Enforce maximum stack depth of SIZE-1 to avoid writing
14779 outside of the allocated space. Also enforce minimum>0. */
14780 if (stacki
>= ARRAY_SIZE (stack
) - 1)
14782 complaint (&symfile_complaints
,
14783 _("location description stack overflow"));
14789 complaint (&symfile_complaints
,
14790 _("location description stack underflow"));
14794 return (stack
[stacki
]);
14797 /* memory allocation interface */
14799 static struct dwarf_block
*
14800 dwarf_alloc_block (struct dwarf2_cu
*cu
)
14802 struct dwarf_block
*blk
;
14804 blk
= (struct dwarf_block
*)
14805 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
14809 static struct abbrev_info
*
14810 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
14812 struct abbrev_info
*abbrev
;
14814 abbrev
= (struct abbrev_info
*)
14815 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
14816 memset (abbrev
, 0, sizeof (struct abbrev_info
));
14820 static struct die_info
*
14821 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
14823 struct die_info
*die
;
14824 size_t size
= sizeof (struct die_info
);
14827 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
14829 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
14830 memset (die
, 0, sizeof (struct die_info
));
14835 /* Macro support. */
14837 /* Return the full name of file number I in *LH's file name table.
14838 Use COMP_DIR as the name of the current directory of the
14839 compilation. The result is allocated using xmalloc; the caller is
14840 responsible for freeing it. */
14842 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
14844 /* Is the file number a valid index into the line header's file name
14845 table? Remember that file numbers start with one, not zero. */
14846 if (1 <= file
&& file
<= lh
->num_file_names
)
14848 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
14850 if (IS_ABSOLUTE_PATH (fe
->name
))
14851 return xstrdup (fe
->name
);
14859 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
14865 dir_len
= strlen (dir
);
14866 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
14867 strcpy (full_name
, dir
);
14868 full_name
[dir_len
] = '/';
14869 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
14873 return xstrdup (fe
->name
);
14878 /* The compiler produced a bogus file number. We can at least
14879 record the macro definitions made in the file, even if we
14880 won't be able to find the file by name. */
14881 char fake_name
[80];
14883 sprintf (fake_name
, "<bad macro file number %d>", file
);
14885 complaint (&symfile_complaints
,
14886 _("bad file number in macro information (%d)"),
14889 return xstrdup (fake_name
);
14894 static struct macro_source_file
*
14895 macro_start_file (int file
, int line
,
14896 struct macro_source_file
*current_file
,
14897 const char *comp_dir
,
14898 struct line_header
*lh
, struct objfile
*objfile
)
14900 /* The full name of this source file. */
14901 char *full_name
= file_full_name (file
, lh
, comp_dir
);
14903 /* We don't create a macro table for this compilation unit
14904 at all until we actually get a filename. */
14905 if (! pending_macros
)
14906 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
14907 objfile
->macro_cache
);
14909 if (! current_file
)
14910 /* If we have no current file, then this must be the start_file
14911 directive for the compilation unit's main source file. */
14912 current_file
= macro_set_main (pending_macros
, full_name
);
14914 current_file
= macro_include (current_file
, line
, full_name
);
14918 return current_file
;
14922 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
14923 followed by a null byte. */
14925 copy_string (const char *buf
, int len
)
14927 char *s
= xmalloc (len
+ 1);
14929 memcpy (s
, buf
, len
);
14935 static const char *
14936 consume_improper_spaces (const char *p
, const char *body
)
14940 complaint (&symfile_complaints
,
14941 _("macro definition contains spaces "
14942 "in formal argument list:\n`%s'"),
14954 parse_macro_definition (struct macro_source_file
*file
, int line
,
14959 /* The body string takes one of two forms. For object-like macro
14960 definitions, it should be:
14962 <macro name> " " <definition>
14964 For function-like macro definitions, it should be:
14966 <macro name> "() " <definition>
14968 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
14970 Spaces may appear only where explicitly indicated, and in the
14973 The Dwarf 2 spec says that an object-like macro's name is always
14974 followed by a space, but versions of GCC around March 2002 omit
14975 the space when the macro's definition is the empty string.
14977 The Dwarf 2 spec says that there should be no spaces between the
14978 formal arguments in a function-like macro's formal argument list,
14979 but versions of GCC around March 2002 include spaces after the
14983 /* Find the extent of the macro name. The macro name is terminated
14984 by either a space or null character (for an object-like macro) or
14985 an opening paren (for a function-like macro). */
14986 for (p
= body
; *p
; p
++)
14987 if (*p
== ' ' || *p
== '(')
14990 if (*p
== ' ' || *p
== '\0')
14992 /* It's an object-like macro. */
14993 int name_len
= p
- body
;
14994 char *name
= copy_string (body
, name_len
);
14995 const char *replacement
;
14998 replacement
= body
+ name_len
+ 1;
15001 dwarf2_macro_malformed_definition_complaint (body
);
15002 replacement
= body
+ name_len
;
15005 macro_define_object (file
, line
, name
, replacement
);
15009 else if (*p
== '(')
15011 /* It's a function-like macro. */
15012 char *name
= copy_string (body
, p
- body
);
15015 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
15019 p
= consume_improper_spaces (p
, body
);
15021 /* Parse the formal argument list. */
15022 while (*p
&& *p
!= ')')
15024 /* Find the extent of the current argument name. */
15025 const char *arg_start
= p
;
15027 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
15030 if (! *p
|| p
== arg_start
)
15031 dwarf2_macro_malformed_definition_complaint (body
);
15034 /* Make sure argv has room for the new argument. */
15035 if (argc
>= argv_size
)
15038 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
15041 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
15044 p
= consume_improper_spaces (p
, body
);
15046 /* Consume the comma, if present. */
15051 p
= consume_improper_spaces (p
, body
);
15060 /* Perfectly formed definition, no complaints. */
15061 macro_define_function (file
, line
, name
,
15062 argc
, (const char **) argv
,
15064 else if (*p
== '\0')
15066 /* Complain, but do define it. */
15067 dwarf2_macro_malformed_definition_complaint (body
);
15068 macro_define_function (file
, line
, name
,
15069 argc
, (const char **) argv
,
15073 /* Just complain. */
15074 dwarf2_macro_malformed_definition_complaint (body
);
15077 /* Just complain. */
15078 dwarf2_macro_malformed_definition_complaint (body
);
15084 for (i
= 0; i
< argc
; i
++)
15090 dwarf2_macro_malformed_definition_complaint (body
);
15093 /* Skip some bytes from BYTES according to the form given in FORM.
15094 Returns the new pointer. */
15097 skip_form_bytes (bfd
*abfd
, gdb_byte
*bytes
,
15098 enum dwarf_form form
,
15099 unsigned int offset_size
,
15100 struct dwarf2_section_info
*section
)
15102 unsigned int bytes_read
;
15106 case DW_FORM_data1
:
15111 case DW_FORM_data2
:
15115 case DW_FORM_data4
:
15119 case DW_FORM_data8
:
15123 case DW_FORM_string
:
15124 read_direct_string (abfd
, bytes
, &bytes_read
);
15125 bytes
+= bytes_read
;
15128 case DW_FORM_sec_offset
:
15130 bytes
+= offset_size
;
15133 case DW_FORM_block
:
15134 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
15135 bytes
+= bytes_read
;
15138 case DW_FORM_block1
:
15139 bytes
+= 1 + read_1_byte (abfd
, bytes
);
15141 case DW_FORM_block2
:
15142 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
15144 case DW_FORM_block4
:
15145 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
15148 case DW_FORM_sdata
:
15149 case DW_FORM_udata
:
15150 bytes
= skip_leb128 (abfd
, bytes
);
15156 complaint (&symfile_complaints
,
15157 _("invalid form 0x%x in `%s'"),
15159 section
->asection
->name
);
15167 /* A helper for dwarf_decode_macros that handles skipping an unknown
15168 opcode. Returns an updated pointer to the macro data buffer; or,
15169 on error, issues a complaint and returns NULL. */
15172 skip_unknown_opcode (unsigned int opcode
,
15173 gdb_byte
**opcode_definitions
,
15176 unsigned int offset_size
,
15177 struct dwarf2_section_info
*section
)
15179 unsigned int bytes_read
, i
;
15183 if (opcode_definitions
[opcode
] == NULL
)
15185 complaint (&symfile_complaints
,
15186 _("unrecognized DW_MACFINO opcode 0x%x"),
15191 defn
= opcode_definitions
[opcode
];
15192 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
15193 defn
+= bytes_read
;
15195 for (i
= 0; i
< arg
; ++i
)
15197 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, defn
[i
], offset_size
, section
);
15198 if (mac_ptr
== NULL
)
15200 /* skip_form_bytes already issued the complaint. */
15208 /* A helper function which parses the header of a macro section.
15209 If the macro section is the extended (for now called "GNU") type,
15210 then this updates *OFFSET_SIZE. Returns a pointer to just after
15211 the header, or issues a complaint and returns NULL on error. */
15214 dwarf_parse_macro_header (gdb_byte
**opcode_definitions
,
15217 unsigned int *offset_size
,
15218 int section_is_gnu
)
15220 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
15222 if (section_is_gnu
)
15224 unsigned int version
, flags
;
15226 version
= read_2_bytes (abfd
, mac_ptr
);
15229 complaint (&symfile_complaints
,
15230 _("unrecognized version `%d' in .debug_macro section"),
15236 flags
= read_1_byte (abfd
, mac_ptr
);
15238 *offset_size
= (flags
& 1) ? 8 : 4;
15240 if ((flags
& 2) != 0)
15241 /* We don't need the line table offset. */
15242 mac_ptr
+= *offset_size
;
15244 /* Vendor opcode descriptions. */
15245 if ((flags
& 4) != 0)
15247 unsigned int i
, count
;
15249 count
= read_1_byte (abfd
, mac_ptr
);
15251 for (i
= 0; i
< count
; ++i
)
15253 unsigned int opcode
, bytes_read
;
15256 opcode
= read_1_byte (abfd
, mac_ptr
);
15258 opcode_definitions
[opcode
] = mac_ptr
;
15259 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15260 mac_ptr
+= bytes_read
;
15269 /* A helper for dwarf_decode_macros that handles the GNU extensions,
15270 including DW_MACRO_GNU_transparent_include. */
15273 dwarf_decode_macro_bytes (bfd
*abfd
, gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
15274 struct macro_source_file
*current_file
,
15275 struct line_header
*lh
, char *comp_dir
,
15276 struct dwarf2_section_info
*section
,
15277 int section_is_gnu
,
15278 unsigned int offset_size
,
15279 struct objfile
*objfile
,
15280 htab_t include_hash
)
15282 enum dwarf_macro_record_type macinfo_type
;
15283 int at_commandline
;
15284 gdb_byte
*opcode_definitions
[256];
15286 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
15287 &offset_size
, section_is_gnu
);
15288 if (mac_ptr
== NULL
)
15290 /* We already issued a complaint. */
15294 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
15295 GDB is still reading the definitions from command line. First
15296 DW_MACINFO_start_file will need to be ignored as it was already executed
15297 to create CURRENT_FILE for the main source holding also the command line
15298 definitions. On first met DW_MACINFO_start_file this flag is reset to
15299 normally execute all the remaining DW_MACINFO_start_file macinfos. */
15301 at_commandline
= 1;
15305 /* Do we at least have room for a macinfo type byte? */
15306 if (mac_ptr
>= mac_end
)
15308 dwarf2_macros_too_long_complaint (section
);
15312 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
15315 /* Note that we rely on the fact that the corresponding GNU and
15316 DWARF constants are the same. */
15317 switch (macinfo_type
)
15319 /* A zero macinfo type indicates the end of the macro
15324 case DW_MACRO_GNU_define
:
15325 case DW_MACRO_GNU_undef
:
15326 case DW_MACRO_GNU_define_indirect
:
15327 case DW_MACRO_GNU_undef_indirect
:
15329 unsigned int bytes_read
;
15334 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15335 mac_ptr
+= bytes_read
;
15337 if (macinfo_type
== DW_MACRO_GNU_define
15338 || macinfo_type
== DW_MACRO_GNU_undef
)
15340 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
15341 mac_ptr
+= bytes_read
;
15345 LONGEST str_offset
;
15347 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
15348 mac_ptr
+= offset_size
;
15350 body
= read_indirect_string_at_offset (abfd
, str_offset
);
15353 is_define
= (macinfo_type
== DW_MACRO_GNU_define
15354 || macinfo_type
== DW_MACRO_GNU_define_indirect
);
15355 if (! current_file
)
15357 /* DWARF violation as no main source is present. */
15358 complaint (&symfile_complaints
,
15359 _("debug info with no main source gives macro %s "
15361 is_define
? _("definition") : _("undefinition"),
15365 if ((line
== 0 && !at_commandline
)
15366 || (line
!= 0 && at_commandline
))
15367 complaint (&symfile_complaints
,
15368 _("debug info gives %s macro %s with %s line %d: %s"),
15369 at_commandline
? _("command-line") : _("in-file"),
15370 is_define
? _("definition") : _("undefinition"),
15371 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
15374 parse_macro_definition (current_file
, line
, body
);
15377 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
15378 || macinfo_type
== DW_MACRO_GNU_undef_indirect
);
15379 macro_undef (current_file
, line
, body
);
15384 case DW_MACRO_GNU_start_file
:
15386 unsigned int bytes_read
;
15389 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15390 mac_ptr
+= bytes_read
;
15391 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15392 mac_ptr
+= bytes_read
;
15394 if ((line
== 0 && !at_commandline
)
15395 || (line
!= 0 && at_commandline
))
15396 complaint (&symfile_complaints
,
15397 _("debug info gives source %d included "
15398 "from %s at %s line %d"),
15399 file
, at_commandline
? _("command-line") : _("file"),
15400 line
== 0 ? _("zero") : _("non-zero"), line
);
15402 if (at_commandline
)
15404 /* This DW_MACRO_GNU_start_file was executed in the
15406 at_commandline
= 0;
15409 current_file
= macro_start_file (file
, line
,
15410 current_file
, comp_dir
,
15415 case DW_MACRO_GNU_end_file
:
15416 if (! current_file
)
15417 complaint (&symfile_complaints
,
15418 _("macro debug info has an unmatched "
15419 "`close_file' directive"));
15422 current_file
= current_file
->included_by
;
15423 if (! current_file
)
15425 enum dwarf_macro_record_type next_type
;
15427 /* GCC circa March 2002 doesn't produce the zero
15428 type byte marking the end of the compilation
15429 unit. Complain if it's not there, but exit no
15432 /* Do we at least have room for a macinfo type byte? */
15433 if (mac_ptr
>= mac_end
)
15435 dwarf2_macros_too_long_complaint (section
);
15439 /* We don't increment mac_ptr here, so this is just
15441 next_type
= read_1_byte (abfd
, mac_ptr
);
15442 if (next_type
!= 0)
15443 complaint (&symfile_complaints
,
15444 _("no terminating 0-type entry for "
15445 "macros in `.debug_macinfo' section"));
15452 case DW_MACRO_GNU_transparent_include
:
15457 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
15458 mac_ptr
+= offset_size
;
15460 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
15463 /* This has actually happened; see
15464 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
15465 complaint (&symfile_complaints
,
15466 _("recursive DW_MACRO_GNU_transparent_include in "
15467 ".debug_macro section"));
15473 dwarf_decode_macro_bytes (abfd
,
15474 section
->buffer
+ offset
,
15475 mac_end
, current_file
,
15477 section
, section_is_gnu
,
15478 offset_size
, objfile
, include_hash
);
15480 htab_remove_elt (include_hash
, mac_ptr
);
15485 case DW_MACINFO_vendor_ext
:
15486 if (!section_is_gnu
)
15488 unsigned int bytes_read
;
15491 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15492 mac_ptr
+= bytes_read
;
15493 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
15494 mac_ptr
+= bytes_read
;
15496 /* We don't recognize any vendor extensions. */
15502 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
15503 mac_ptr
, abfd
, offset_size
,
15505 if (mac_ptr
== NULL
)
15509 } while (macinfo_type
!= 0);
15513 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
15514 char *comp_dir
, bfd
*abfd
,
15515 struct dwarf2_cu
*cu
,
15516 struct dwarf2_section_info
*section
,
15517 int section_is_gnu
)
15519 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15520 gdb_byte
*mac_ptr
, *mac_end
;
15521 struct macro_source_file
*current_file
= 0;
15522 enum dwarf_macro_record_type macinfo_type
;
15523 unsigned int offset_size
= cu
->header
.offset_size
;
15524 gdb_byte
*opcode_definitions
[256];
15525 struct cleanup
*cleanup
;
15526 htab_t include_hash
;
15529 dwarf2_read_section (objfile
, section
);
15530 if (section
->buffer
== NULL
)
15532 complaint (&symfile_complaints
, _("missing %s section"),
15533 section
->asection
->name
);
15537 /* First pass: Find the name of the base filename.
15538 This filename is needed in order to process all macros whose definition
15539 (or undefinition) comes from the command line. These macros are defined
15540 before the first DW_MACINFO_start_file entry, and yet still need to be
15541 associated to the base file.
15543 To determine the base file name, we scan the macro definitions until we
15544 reach the first DW_MACINFO_start_file entry. We then initialize
15545 CURRENT_FILE accordingly so that any macro definition found before the
15546 first DW_MACINFO_start_file can still be associated to the base file. */
15548 mac_ptr
= section
->buffer
+ offset
;
15549 mac_end
= section
->buffer
+ section
->size
;
15551 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
15552 &offset_size
, section_is_gnu
);
15553 if (mac_ptr
== NULL
)
15555 /* We already issued a complaint. */
15561 /* Do we at least have room for a macinfo type byte? */
15562 if (mac_ptr
>= mac_end
)
15564 /* Complaint is printed during the second pass as GDB will probably
15565 stop the first pass earlier upon finding
15566 DW_MACINFO_start_file. */
15570 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
15573 /* Note that we rely on the fact that the corresponding GNU and
15574 DWARF constants are the same. */
15575 switch (macinfo_type
)
15577 /* A zero macinfo type indicates the end of the macro
15582 case DW_MACRO_GNU_define
:
15583 case DW_MACRO_GNU_undef
:
15584 /* Only skip the data by MAC_PTR. */
15586 unsigned int bytes_read
;
15588 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15589 mac_ptr
+= bytes_read
;
15590 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
15591 mac_ptr
+= bytes_read
;
15595 case DW_MACRO_GNU_start_file
:
15597 unsigned int bytes_read
;
15600 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15601 mac_ptr
+= bytes_read
;
15602 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15603 mac_ptr
+= bytes_read
;
15605 current_file
= macro_start_file (file
, line
, current_file
,
15606 comp_dir
, lh
, objfile
);
15610 case DW_MACRO_GNU_end_file
:
15611 /* No data to skip by MAC_PTR. */
15614 case DW_MACRO_GNU_define_indirect
:
15615 case DW_MACRO_GNU_undef_indirect
:
15617 unsigned int bytes_read
;
15619 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15620 mac_ptr
+= bytes_read
;
15621 mac_ptr
+= offset_size
;
15625 case DW_MACRO_GNU_transparent_include
:
15626 /* Note that, according to the spec, a transparent include
15627 chain cannot call DW_MACRO_GNU_start_file. So, we can just
15628 skip this opcode. */
15629 mac_ptr
+= offset_size
;
15632 case DW_MACINFO_vendor_ext
:
15633 /* Only skip the data by MAC_PTR. */
15634 if (!section_is_gnu
)
15636 unsigned int bytes_read
;
15638 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15639 mac_ptr
+= bytes_read
;
15640 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
15641 mac_ptr
+= bytes_read
;
15646 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
15647 mac_ptr
, abfd
, offset_size
,
15649 if (mac_ptr
== NULL
)
15653 } while (macinfo_type
!= 0 && current_file
== NULL
);
15655 /* Second pass: Process all entries.
15657 Use the AT_COMMAND_LINE flag to determine whether we are still processing
15658 command-line macro definitions/undefinitions. This flag is unset when we
15659 reach the first DW_MACINFO_start_file entry. */
15661 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
15662 NULL
, xcalloc
, xfree
);
15663 cleanup
= make_cleanup_htab_delete (include_hash
);
15664 mac_ptr
= section
->buffer
+ offset
;
15665 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
15667 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
15668 current_file
, lh
, comp_dir
, section
, section_is_gnu
,
15669 offset_size
, objfile
, include_hash
);
15670 do_cleanups (cleanup
);
15673 /* Check if the attribute's form is a DW_FORM_block*
15674 if so return true else false. */
15677 attr_form_is_block (struct attribute
*attr
)
15679 return (attr
== NULL
? 0 :
15680 attr
->form
== DW_FORM_block1
15681 || attr
->form
== DW_FORM_block2
15682 || attr
->form
== DW_FORM_block4
15683 || attr
->form
== DW_FORM_block
15684 || attr
->form
== DW_FORM_exprloc
);
15687 /* Return non-zero if ATTR's value is a section offset --- classes
15688 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
15689 You may use DW_UNSND (attr) to retrieve such offsets.
15691 Section 7.5.4, "Attribute Encodings", explains that no attribute
15692 may have a value that belongs to more than one of these classes; it
15693 would be ambiguous if we did, because we use the same forms for all
15697 attr_form_is_section_offset (struct attribute
*attr
)
15699 return (attr
->form
== DW_FORM_data4
15700 || attr
->form
== DW_FORM_data8
15701 || attr
->form
== DW_FORM_sec_offset
);
15705 /* Return non-zero if ATTR's value falls in the 'constant' class, or
15706 zero otherwise. When this function returns true, you can apply
15707 dwarf2_get_attr_constant_value to it.
15709 However, note that for some attributes you must check
15710 attr_form_is_section_offset before using this test. DW_FORM_data4
15711 and DW_FORM_data8 are members of both the constant class, and of
15712 the classes that contain offsets into other debug sections
15713 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
15714 that, if an attribute's can be either a constant or one of the
15715 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
15716 taken as section offsets, not constants. */
15719 attr_form_is_constant (struct attribute
*attr
)
15721 switch (attr
->form
)
15723 case DW_FORM_sdata
:
15724 case DW_FORM_udata
:
15725 case DW_FORM_data1
:
15726 case DW_FORM_data2
:
15727 case DW_FORM_data4
:
15728 case DW_FORM_data8
:
15735 /* A helper function that fills in a dwarf2_loclist_baton. */
15738 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
15739 struct dwarf2_loclist_baton
*baton
,
15740 struct attribute
*attr
)
15742 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
15743 &dwarf2_per_objfile
->loc
);
15745 baton
->per_cu
= cu
->per_cu
;
15746 gdb_assert (baton
->per_cu
);
15747 /* We don't know how long the location list is, but make sure we
15748 don't run off the edge of the section. */
15749 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
15750 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
15751 baton
->base_address
= cu
->base_address
;
15755 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
15756 struct dwarf2_cu
*cu
)
15758 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15760 if (attr_form_is_section_offset (attr
)
15761 /* ".debug_loc" may not exist at all, or the offset may be outside
15762 the section. If so, fall through to the complaint in the
15764 && DW_UNSND (attr
) < dwarf2_section_size (objfile
,
15765 &dwarf2_per_objfile
->loc
))
15767 struct dwarf2_loclist_baton
*baton
;
15769 baton
= obstack_alloc (&objfile
->objfile_obstack
,
15770 sizeof (struct dwarf2_loclist_baton
));
15772 fill_in_loclist_baton (cu
, baton
, attr
);
15774 if (cu
->base_known
== 0)
15775 complaint (&symfile_complaints
,
15776 _("Location list used without "
15777 "specifying the CU base address."));
15779 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
15780 SYMBOL_LOCATION_BATON (sym
) = baton
;
15784 struct dwarf2_locexpr_baton
*baton
;
15786 baton
= obstack_alloc (&objfile
->objfile_obstack
,
15787 sizeof (struct dwarf2_locexpr_baton
));
15788 baton
->per_cu
= cu
->per_cu
;
15789 gdb_assert (baton
->per_cu
);
15791 if (attr_form_is_block (attr
))
15793 /* Note that we're just copying the block's data pointer
15794 here, not the actual data. We're still pointing into the
15795 info_buffer for SYM's objfile; right now we never release
15796 that buffer, but when we do clean up properly this may
15798 baton
->size
= DW_BLOCK (attr
)->size
;
15799 baton
->data
= DW_BLOCK (attr
)->data
;
15803 dwarf2_invalid_attrib_class_complaint ("location description",
15804 SYMBOL_NATURAL_NAME (sym
));
15808 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
15809 SYMBOL_LOCATION_BATON (sym
) = baton
;
15813 /* Return the OBJFILE associated with the compilation unit CU. If CU
15814 came from a separate debuginfo file, then the master objfile is
15818 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
15820 struct objfile
*objfile
= per_cu
->objfile
;
15822 /* Return the master objfile, so that we can report and look up the
15823 correct file containing this variable. */
15824 if (objfile
->separate_debug_objfile_backlink
)
15825 objfile
= objfile
->separate_debug_objfile_backlink
;
15830 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
15831 (CU_HEADERP is unused in such case) or prepare a temporary copy at
15832 CU_HEADERP first. */
15834 static const struct comp_unit_head
*
15835 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
15836 struct dwarf2_per_cu_data
*per_cu
)
15838 struct objfile
*objfile
;
15839 struct dwarf2_per_objfile
*per_objfile
;
15840 gdb_byte
*info_ptr
;
15843 return &per_cu
->cu
->header
;
15845 objfile
= per_cu
->objfile
;
15846 per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
15847 info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
.sect_off
;
15849 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
15850 read_comp_unit_head (cu_headerp
, info_ptr
, objfile
->obfd
);
15855 /* Return the address size given in the compilation unit header for CU. */
15858 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
15860 struct comp_unit_head cu_header_local
;
15861 const struct comp_unit_head
*cu_headerp
;
15863 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
15865 return cu_headerp
->addr_size
;
15868 /* Return the offset size given in the compilation unit header for CU. */
15871 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
15873 struct comp_unit_head cu_header_local
;
15874 const struct comp_unit_head
*cu_headerp
;
15876 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
15878 return cu_headerp
->offset_size
;
15881 /* See its dwarf2loc.h declaration. */
15884 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
15886 struct comp_unit_head cu_header_local
;
15887 const struct comp_unit_head
*cu_headerp
;
15889 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
15891 if (cu_headerp
->version
== 2)
15892 return cu_headerp
->addr_size
;
15894 return cu_headerp
->offset_size
;
15897 /* Return the text offset of the CU. The returned offset comes from
15898 this CU's objfile. If this objfile came from a separate debuginfo
15899 file, then the offset may be different from the corresponding
15900 offset in the parent objfile. */
15903 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
15905 struct objfile
*objfile
= per_cu
->objfile
;
15907 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15910 /* Locate the .debug_info compilation unit from CU's objfile which contains
15911 the DIE at OFFSET. Raises an error on failure. */
15913 static struct dwarf2_per_cu_data
*
15914 dwarf2_find_containing_comp_unit (sect_offset offset
,
15915 struct objfile
*objfile
)
15917 struct dwarf2_per_cu_data
*this_cu
;
15921 high
= dwarf2_per_objfile
->n_comp_units
- 1;
15924 int mid
= low
+ (high
- low
) / 2;
15926 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
.sect_off
15927 >= offset
.sect_off
)
15932 gdb_assert (low
== high
);
15933 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
.sect_off
15937 error (_("Dwarf Error: could not find partial DIE containing "
15938 "offset 0x%lx [in module %s]"),
15939 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
15941 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
15942 <= offset
.sect_off
);
15943 return dwarf2_per_objfile
->all_comp_units
[low
-1];
15947 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
15948 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
15949 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
15950 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
15951 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
15956 /* Initialize dwarf2_cu CU, owned by PER_CU. */
15959 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
15961 memset (cu
, 0, sizeof (*cu
));
15963 cu
->per_cu
= per_cu
;
15964 cu
->objfile
= per_cu
->objfile
;
15965 obstack_init (&cu
->comp_unit_obstack
);
15968 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
15971 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
)
15973 struct attribute
*attr
;
15975 /* Set the language we're debugging. */
15976 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
15978 set_cu_language (DW_UNSND (attr
), cu
);
15981 cu
->language
= language_minimal
;
15982 cu
->language_defn
= language_def (cu
->language
);
15986 /* Release one cached compilation unit, CU. We unlink it from the tree
15987 of compilation units, but we don't remove it from the read_in_chain;
15988 the caller is responsible for that.
15989 NOTE: DATA is a void * because this function is also used as a
15990 cleanup routine. */
15993 free_heap_comp_unit (void *data
)
15995 struct dwarf2_cu
*cu
= data
;
15997 gdb_assert (cu
->per_cu
!= NULL
);
15998 cu
->per_cu
->cu
= NULL
;
16001 obstack_free (&cu
->comp_unit_obstack
, NULL
);
16006 /* This cleanup function is passed the address of a dwarf2_cu on the stack
16007 when we're finished with it. We can't free the pointer itself, but be
16008 sure to unlink it from the cache. Also release any associated storage
16009 and perform cache maintenance.
16011 Only used during partial symbol parsing. */
16014 free_stack_comp_unit (void *data
)
16016 struct dwarf2_cu
*cu
= data
;
16018 gdb_assert (cu
->per_cu
!= NULL
);
16019 cu
->per_cu
->cu
= NULL
;
16022 obstack_free (&cu
->comp_unit_obstack
, NULL
);
16023 cu
->partial_dies
= NULL
;
16025 /* The previous code only did this if per_cu != NULL.
16026 But that would always succeed, so now we just unconditionally do
16027 the aging. This seems like the wrong place to do such aging,
16028 but cleaning that up is left for later. */
16029 age_cached_comp_units ();
16032 /* Free all cached compilation units. */
16035 free_cached_comp_units (void *data
)
16037 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
16039 per_cu
= dwarf2_per_objfile
->read_in_chain
;
16040 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
16041 while (per_cu
!= NULL
)
16043 struct dwarf2_per_cu_data
*next_cu
;
16045 next_cu
= per_cu
->cu
->read_in_chain
;
16047 free_heap_comp_unit (per_cu
->cu
);
16048 *last_chain
= next_cu
;
16054 /* Increase the age counter on each cached compilation unit, and free
16055 any that are too old. */
16058 age_cached_comp_units (void)
16060 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
16062 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
16063 per_cu
= dwarf2_per_objfile
->read_in_chain
;
16064 while (per_cu
!= NULL
)
16066 per_cu
->cu
->last_used
++;
16067 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
16068 dwarf2_mark (per_cu
->cu
);
16069 per_cu
= per_cu
->cu
->read_in_chain
;
16072 per_cu
= dwarf2_per_objfile
->read_in_chain
;
16073 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
16074 while (per_cu
!= NULL
)
16076 struct dwarf2_per_cu_data
*next_cu
;
16078 next_cu
= per_cu
->cu
->read_in_chain
;
16080 if (!per_cu
->cu
->mark
)
16082 free_heap_comp_unit (per_cu
->cu
);
16083 *last_chain
= next_cu
;
16086 last_chain
= &per_cu
->cu
->read_in_chain
;
16092 /* Remove a single compilation unit from the cache. */
16095 free_one_cached_comp_unit (void *target_cu
)
16097 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
16099 per_cu
= dwarf2_per_objfile
->read_in_chain
;
16100 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
16101 while (per_cu
!= NULL
)
16103 struct dwarf2_per_cu_data
*next_cu
;
16105 next_cu
= per_cu
->cu
->read_in_chain
;
16107 if (per_cu
->cu
== target_cu
)
16109 free_heap_comp_unit (per_cu
->cu
);
16110 *last_chain
= next_cu
;
16114 last_chain
= &per_cu
->cu
->read_in_chain
;
16120 /* Release all extra memory associated with OBJFILE. */
16123 dwarf2_free_objfile (struct objfile
*objfile
)
16125 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
16127 if (dwarf2_per_objfile
== NULL
)
16130 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
16131 free_cached_comp_units (NULL
);
16133 if (dwarf2_per_objfile
->quick_file_names_table
)
16134 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
16136 /* Everything else should be on the objfile obstack. */
16139 /* A pair of DIE offset and GDB type pointer. We store these
16140 in a hash table separate from the DIEs, and preserve them
16141 when the DIEs are flushed out of cache. */
16143 struct dwarf2_offset_and_type
16145 sect_offset offset
;
16149 /* Hash function for a dwarf2_offset_and_type. */
16152 offset_and_type_hash (const void *item
)
16154 const struct dwarf2_offset_and_type
*ofs
= item
;
16156 return ofs
->offset
.sect_off
;
16159 /* Equality function for a dwarf2_offset_and_type. */
16162 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
16164 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
16165 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
16167 return ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
;
16170 /* Set the type associated with DIE to TYPE. Save it in CU's hash
16171 table if necessary. For convenience, return TYPE.
16173 The DIEs reading must have careful ordering to:
16174 * Not cause infite loops trying to read in DIEs as a prerequisite for
16175 reading current DIE.
16176 * Not trying to dereference contents of still incompletely read in types
16177 while reading in other DIEs.
16178 * Enable referencing still incompletely read in types just by a pointer to
16179 the type without accessing its fields.
16181 Therefore caller should follow these rules:
16182 * Try to fetch any prerequisite types we may need to build this DIE type
16183 before building the type and calling set_die_type.
16184 * After building type call set_die_type for current DIE as soon as
16185 possible before fetching more types to complete the current type.
16186 * Make the type as complete as possible before fetching more types. */
16188 static struct type
*
16189 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
16191 struct dwarf2_offset_and_type
**slot
, ofs
;
16192 struct objfile
*objfile
= cu
->objfile
;
16193 htab_t
*type_hash_ptr
;
16195 /* For Ada types, make sure that the gnat-specific data is always
16196 initialized (if not already set). There are a few types where
16197 we should not be doing so, because the type-specific area is
16198 already used to hold some other piece of info (eg: TYPE_CODE_FLT
16199 where the type-specific area is used to store the floatformat).
16200 But this is not a problem, because the gnat-specific information
16201 is actually not needed for these types. */
16202 if (need_gnat_info (cu
)
16203 && TYPE_CODE (type
) != TYPE_CODE_FUNC
16204 && TYPE_CODE (type
) != TYPE_CODE_FLT
16205 && !HAVE_GNAT_AUX_INFO (type
))
16206 INIT_GNAT_SPECIFIC (type
);
16208 if (cu
->per_cu
->debug_types_section
)
16209 type_hash_ptr
= &dwarf2_per_objfile
->debug_types_type_hash
;
16211 type_hash_ptr
= &dwarf2_per_objfile
->debug_info_type_hash
;
16213 if (*type_hash_ptr
== NULL
)
16216 = htab_create_alloc_ex (127,
16217 offset_and_type_hash
,
16218 offset_and_type_eq
,
16220 &objfile
->objfile_obstack
,
16221 hashtab_obstack_allocate
,
16222 dummy_obstack_deallocate
);
16225 ofs
.offset
= die
->offset
;
16227 slot
= (struct dwarf2_offset_and_type
**)
16228 htab_find_slot_with_hash (*type_hash_ptr
, &ofs
, ofs
.offset
.sect_off
,
16231 complaint (&symfile_complaints
,
16232 _("A problem internal to GDB: DIE 0x%x has type already set"),
16233 die
->offset
.sect_off
);
16234 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
16239 /* Look up the type for the die at OFFSET in the appropriate type_hash
16240 table, or return NULL if the die does not have a saved type. */
16242 static struct type
*
16243 get_die_type_at_offset (sect_offset offset
,
16244 struct dwarf2_per_cu_data
*per_cu
)
16246 struct dwarf2_offset_and_type
*slot
, ofs
;
16249 if (per_cu
->debug_types_section
)
16250 type_hash
= dwarf2_per_objfile
->debug_types_type_hash
;
16252 type_hash
= dwarf2_per_objfile
->debug_info_type_hash
;
16253 if (type_hash
== NULL
)
16256 ofs
.offset
= offset
;
16257 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
.sect_off
);
16264 /* Look up the type for DIE in the appropriate type_hash table,
16265 or return NULL if DIE does not have a saved type. */
16267 static struct type
*
16268 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16270 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
16273 /* Add a dependence relationship from CU to REF_PER_CU. */
16276 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
16277 struct dwarf2_per_cu_data
*ref_per_cu
)
16281 if (cu
->dependencies
== NULL
)
16283 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
16284 NULL
, &cu
->comp_unit_obstack
,
16285 hashtab_obstack_allocate
,
16286 dummy_obstack_deallocate
);
16288 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
16290 *slot
= ref_per_cu
;
16293 /* Subroutine of dwarf2_mark to pass to htab_traverse.
16294 Set the mark field in every compilation unit in the
16295 cache that we must keep because we are keeping CU. */
16298 dwarf2_mark_helper (void **slot
, void *data
)
16300 struct dwarf2_per_cu_data
*per_cu
;
16302 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
16304 /* cu->dependencies references may not yet have been ever read if QUIT aborts
16305 reading of the chain. As such dependencies remain valid it is not much
16306 useful to track and undo them during QUIT cleanups. */
16307 if (per_cu
->cu
== NULL
)
16310 if (per_cu
->cu
->mark
)
16312 per_cu
->cu
->mark
= 1;
16314 if (per_cu
->cu
->dependencies
!= NULL
)
16315 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
16320 /* Set the mark field in CU and in every other compilation unit in the
16321 cache that we must keep because we are keeping CU. */
16324 dwarf2_mark (struct dwarf2_cu
*cu
)
16329 if (cu
->dependencies
!= NULL
)
16330 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
16334 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
16338 per_cu
->cu
->mark
= 0;
16339 per_cu
= per_cu
->cu
->read_in_chain
;
16343 /* Trivial hash function for partial_die_info: the hash value of a DIE
16344 is its offset in .debug_info for this objfile. */
16347 partial_die_hash (const void *item
)
16349 const struct partial_die_info
*part_die
= item
;
16351 return part_die
->offset
.sect_off
;
16354 /* Trivial comparison function for partial_die_info structures: two DIEs
16355 are equal if they have the same offset. */
16358 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
16360 const struct partial_die_info
*part_die_lhs
= item_lhs
;
16361 const struct partial_die_info
*part_die_rhs
= item_rhs
;
16363 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
16366 static struct cmd_list_element
*set_dwarf2_cmdlist
;
16367 static struct cmd_list_element
*show_dwarf2_cmdlist
;
16370 set_dwarf2_cmd (char *args
, int from_tty
)
16372 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
16376 show_dwarf2_cmd (char *args
, int from_tty
)
16378 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
16381 /* If section described by INFO was mmapped, munmap it now. */
16384 munmap_section_buffer (struct dwarf2_section_info
*info
)
16386 if (info
->map_addr
!= NULL
)
16391 res
= munmap (info
->map_addr
, info
->map_len
);
16392 gdb_assert (res
== 0);
16394 /* Without HAVE_MMAP, we should never be here to begin with. */
16395 gdb_assert_not_reached ("no mmap support");
16400 /* munmap debug sections for OBJFILE, if necessary. */
16403 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
16405 struct dwarf2_per_objfile
*data
= d
;
16407 struct dwarf2_section_info
*section
;
16409 /* This is sorted according to the order they're defined in to make it easier
16410 to keep in sync. */
16411 munmap_section_buffer (&data
->info
);
16412 munmap_section_buffer (&data
->abbrev
);
16413 munmap_section_buffer (&data
->line
);
16414 munmap_section_buffer (&data
->loc
);
16415 munmap_section_buffer (&data
->macinfo
);
16416 munmap_section_buffer (&data
->macro
);
16417 munmap_section_buffer (&data
->str
);
16418 munmap_section_buffer (&data
->ranges
);
16419 munmap_section_buffer (&data
->frame
);
16420 munmap_section_buffer (&data
->eh_frame
);
16421 munmap_section_buffer (&data
->gdb_index
);
16424 VEC_iterate (dwarf2_section_info_def
, data
->types
, ix
, section
);
16426 munmap_section_buffer (section
);
16428 VEC_free (dwarf2_section_info_def
, data
->types
);
16432 /* The "save gdb-index" command. */
16434 /* The contents of the hash table we create when building the string
16436 struct strtab_entry
16438 offset_type offset
;
16442 /* Hash function for a strtab_entry.
16444 Function is used only during write_hash_table so no index format backward
16445 compatibility is needed. */
16448 hash_strtab_entry (const void *e
)
16450 const struct strtab_entry
*entry
= e
;
16451 return mapped_index_string_hash (INT_MAX
, entry
->str
);
16454 /* Equality function for a strtab_entry. */
16457 eq_strtab_entry (const void *a
, const void *b
)
16459 const struct strtab_entry
*ea
= a
;
16460 const struct strtab_entry
*eb
= b
;
16461 return !strcmp (ea
->str
, eb
->str
);
16464 /* Create a strtab_entry hash table. */
16467 create_strtab (void)
16469 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
16470 xfree
, xcalloc
, xfree
);
16473 /* Add a string to the constant pool. Return the string's offset in
16477 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
16480 struct strtab_entry entry
;
16481 struct strtab_entry
*result
;
16484 slot
= htab_find_slot (table
, &entry
, INSERT
);
16489 result
= XNEW (struct strtab_entry
);
16490 result
->offset
= obstack_object_size (cpool
);
16492 obstack_grow_str0 (cpool
, str
);
16495 return result
->offset
;
16498 /* An entry in the symbol table. */
16499 struct symtab_index_entry
16501 /* The name of the symbol. */
16503 /* The offset of the name in the constant pool. */
16504 offset_type index_offset
;
16505 /* A sorted vector of the indices of all the CUs that hold an object
16507 VEC (offset_type
) *cu_indices
;
16510 /* The symbol table. This is a power-of-2-sized hash table. */
16511 struct mapped_symtab
16513 offset_type n_elements
;
16515 struct symtab_index_entry
**data
;
16518 /* Hash function for a symtab_index_entry. */
16521 hash_symtab_entry (const void *e
)
16523 const struct symtab_index_entry
*entry
= e
;
16524 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
16525 sizeof (offset_type
) * VEC_length (offset_type
,
16526 entry
->cu_indices
),
16530 /* Equality function for a symtab_index_entry. */
16533 eq_symtab_entry (const void *a
, const void *b
)
16535 const struct symtab_index_entry
*ea
= a
;
16536 const struct symtab_index_entry
*eb
= b
;
16537 int len
= VEC_length (offset_type
, ea
->cu_indices
);
16538 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
16540 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
16541 VEC_address (offset_type
, eb
->cu_indices
),
16542 sizeof (offset_type
) * len
);
16545 /* Destroy a symtab_index_entry. */
16548 delete_symtab_entry (void *p
)
16550 struct symtab_index_entry
*entry
= p
;
16551 VEC_free (offset_type
, entry
->cu_indices
);
16555 /* Create a hash table holding symtab_index_entry objects. */
16558 create_symbol_hash_table (void)
16560 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
16561 delete_symtab_entry
, xcalloc
, xfree
);
16564 /* Create a new mapped symtab object. */
16566 static struct mapped_symtab
*
16567 create_mapped_symtab (void)
16569 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
16570 symtab
->n_elements
= 0;
16571 symtab
->size
= 1024;
16572 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
16576 /* Destroy a mapped_symtab. */
16579 cleanup_mapped_symtab (void *p
)
16581 struct mapped_symtab
*symtab
= p
;
16582 /* The contents of the array are freed when the other hash table is
16584 xfree (symtab
->data
);
16588 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
16591 Function is used only during write_hash_table so no index format backward
16592 compatibility is needed. */
16594 static struct symtab_index_entry
**
16595 find_slot (struct mapped_symtab
*symtab
, const char *name
)
16597 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
16599 index
= hash
& (symtab
->size
- 1);
16600 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
16604 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
16605 return &symtab
->data
[index
];
16606 index
= (index
+ step
) & (symtab
->size
- 1);
16610 /* Expand SYMTAB's hash table. */
16613 hash_expand (struct mapped_symtab
*symtab
)
16615 offset_type old_size
= symtab
->size
;
16617 struct symtab_index_entry
**old_entries
= symtab
->data
;
16620 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
16622 for (i
= 0; i
< old_size
; ++i
)
16624 if (old_entries
[i
])
16626 struct symtab_index_entry
**slot
= find_slot (symtab
,
16627 old_entries
[i
]->name
);
16628 *slot
= old_entries
[i
];
16632 xfree (old_entries
);
16635 /* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
16636 is the index of the CU in which the symbol appears. */
16639 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
16640 offset_type cu_index
)
16642 struct symtab_index_entry
**slot
;
16644 ++symtab
->n_elements
;
16645 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
16646 hash_expand (symtab
);
16648 slot
= find_slot (symtab
, name
);
16651 *slot
= XNEW (struct symtab_index_entry
);
16652 (*slot
)->name
= name
;
16653 (*slot
)->cu_indices
= NULL
;
16655 /* Don't push an index twice. Due to how we add entries we only
16656 have to check the last one. */
16657 if (VEC_empty (offset_type
, (*slot
)->cu_indices
)
16658 || VEC_last (offset_type
, (*slot
)->cu_indices
) != cu_index
)
16659 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index
);
16662 /* Add a vector of indices to the constant pool. */
16665 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
16666 struct symtab_index_entry
*entry
)
16670 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
16673 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
16674 offset_type val
= MAYBE_SWAP (len
);
16679 entry
->index_offset
= obstack_object_size (cpool
);
16681 obstack_grow (cpool
, &val
, sizeof (val
));
16683 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
16686 val
= MAYBE_SWAP (iter
);
16687 obstack_grow (cpool
, &val
, sizeof (val
));
16692 struct symtab_index_entry
*old_entry
= *slot
;
16693 entry
->index_offset
= old_entry
->index_offset
;
16696 return entry
->index_offset
;
16699 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
16700 constant pool entries going into the obstack CPOOL. */
16703 write_hash_table (struct mapped_symtab
*symtab
,
16704 struct obstack
*output
, struct obstack
*cpool
)
16707 htab_t symbol_hash_table
;
16710 symbol_hash_table
= create_symbol_hash_table ();
16711 str_table
= create_strtab ();
16713 /* We add all the index vectors to the constant pool first, to
16714 ensure alignment is ok. */
16715 for (i
= 0; i
< symtab
->size
; ++i
)
16717 if (symtab
->data
[i
])
16718 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
16721 /* Now write out the hash table. */
16722 for (i
= 0; i
< symtab
->size
; ++i
)
16724 offset_type str_off
, vec_off
;
16726 if (symtab
->data
[i
])
16728 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
16729 vec_off
= symtab
->data
[i
]->index_offset
;
16733 /* While 0 is a valid constant pool index, it is not valid
16734 to have 0 for both offsets. */
16739 str_off
= MAYBE_SWAP (str_off
);
16740 vec_off
= MAYBE_SWAP (vec_off
);
16742 obstack_grow (output
, &str_off
, sizeof (str_off
));
16743 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
16746 htab_delete (str_table
);
16747 htab_delete (symbol_hash_table
);
16750 /* Struct to map psymtab to CU index in the index file. */
16751 struct psymtab_cu_index_map
16753 struct partial_symtab
*psymtab
;
16754 unsigned int cu_index
;
16758 hash_psymtab_cu_index (const void *item
)
16760 const struct psymtab_cu_index_map
*map
= item
;
16762 return htab_hash_pointer (map
->psymtab
);
16766 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
16768 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
16769 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
16771 return lhs
->psymtab
== rhs
->psymtab
;
16774 /* Helper struct for building the address table. */
16775 struct addrmap_index_data
16777 struct objfile
*objfile
;
16778 struct obstack
*addr_obstack
;
16779 htab_t cu_index_htab
;
16781 /* Non-zero if the previous_* fields are valid.
16782 We can't write an entry until we see the next entry (since it is only then
16783 that we know the end of the entry). */
16784 int previous_valid
;
16785 /* Index of the CU in the table of all CUs in the index file. */
16786 unsigned int previous_cu_index
;
16787 /* Start address of the CU. */
16788 CORE_ADDR previous_cu_start
;
16791 /* Write an address entry to OBSTACK. */
16794 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
16795 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
16797 offset_type cu_index_to_write
;
16799 CORE_ADDR baseaddr
;
16801 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
16803 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
16804 obstack_grow (obstack
, addr
, 8);
16805 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
16806 obstack_grow (obstack
, addr
, 8);
16807 cu_index_to_write
= MAYBE_SWAP (cu_index
);
16808 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
16811 /* Worker function for traversing an addrmap to build the address table. */
16814 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
16816 struct addrmap_index_data
*data
= datap
;
16817 struct partial_symtab
*pst
= obj
;
16818 offset_type cu_index
;
16821 if (data
->previous_valid
)
16822 add_address_entry (data
->objfile
, data
->addr_obstack
,
16823 data
->previous_cu_start
, start_addr
,
16824 data
->previous_cu_index
);
16826 data
->previous_cu_start
= start_addr
;
16829 struct psymtab_cu_index_map find_map
, *map
;
16830 find_map
.psymtab
= pst
;
16831 map
= htab_find (data
->cu_index_htab
, &find_map
);
16832 gdb_assert (map
!= NULL
);
16833 data
->previous_cu_index
= map
->cu_index
;
16834 data
->previous_valid
= 1;
16837 data
->previous_valid
= 0;
16842 /* Write OBJFILE's address map to OBSTACK.
16843 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
16844 in the index file. */
16847 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
16848 htab_t cu_index_htab
)
16850 struct addrmap_index_data addrmap_index_data
;
16852 /* When writing the address table, we have to cope with the fact that
16853 the addrmap iterator only provides the start of a region; we have to
16854 wait until the next invocation to get the start of the next region. */
16856 addrmap_index_data
.objfile
= objfile
;
16857 addrmap_index_data
.addr_obstack
= obstack
;
16858 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
16859 addrmap_index_data
.previous_valid
= 0;
16861 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
16862 &addrmap_index_data
);
16864 /* It's highly unlikely the last entry (end address = 0xff...ff)
16865 is valid, but we should still handle it.
16866 The end address is recorded as the start of the next region, but that
16867 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
16869 if (addrmap_index_data
.previous_valid
)
16870 add_address_entry (objfile
, obstack
,
16871 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
16872 addrmap_index_data
.previous_cu_index
);
16875 /* Add a list of partial symbols to SYMTAB. */
16878 write_psymbols (struct mapped_symtab
*symtab
,
16880 struct partial_symbol
**psymp
,
16882 offset_type cu_index
,
16885 for (; count
-- > 0; ++psymp
)
16887 void **slot
, *lookup
;
16889 if (SYMBOL_LANGUAGE (*psymp
) == language_ada
)
16890 error (_("Ada is not currently supported by the index"));
16892 /* We only want to add a given psymbol once. However, we also
16893 want to account for whether it is global or static. So, we
16894 may add it twice, using slightly different values. */
16897 uintptr_t val
= 1 | (uintptr_t) *psymp
;
16899 lookup
= (void *) val
;
16904 /* Only add a given psymbol once. */
16905 slot
= htab_find_slot (psyms_seen
, lookup
, INSERT
);
16909 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (*psymp
), cu_index
);
16914 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
16915 exception if there is an error. */
16918 write_obstack (FILE *file
, struct obstack
*obstack
)
16920 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
16922 != obstack_object_size (obstack
))
16923 error (_("couldn't data write to file"));
16926 /* Unlink a file if the argument is not NULL. */
16929 unlink_if_set (void *p
)
16931 char **filename
= p
;
16933 unlink (*filename
);
16936 /* A helper struct used when iterating over debug_types. */
16937 struct signatured_type_index_data
16939 struct objfile
*objfile
;
16940 struct mapped_symtab
*symtab
;
16941 struct obstack
*types_list
;
16946 /* A helper function that writes a single signatured_type to an
16950 write_one_signatured_type (void **slot
, void *d
)
16952 struct signatured_type_index_data
*info
= d
;
16953 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
16954 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
16955 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
16958 write_psymbols (info
->symtab
,
16960 info
->objfile
->global_psymbols
.list
16961 + psymtab
->globals_offset
,
16962 psymtab
->n_global_syms
, info
->cu_index
,
16964 write_psymbols (info
->symtab
,
16966 info
->objfile
->static_psymbols
.list
16967 + psymtab
->statics_offset
,
16968 psymtab
->n_static_syms
, info
->cu_index
,
16971 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
16972 entry
->per_cu
.offset
.sect_off
);
16973 obstack_grow (info
->types_list
, val
, 8);
16974 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->type_offset
.cu_off
);
16975 obstack_grow (info
->types_list
, val
, 8);
16976 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
16977 obstack_grow (info
->types_list
, val
, 8);
16984 /* Create an index file for OBJFILE in the directory DIR. */
16987 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
16989 struct cleanup
*cleanup
;
16990 char *filename
, *cleanup_filename
;
16991 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
16992 struct obstack cu_list
, types_cu_list
;
16995 struct mapped_symtab
*symtab
;
16996 offset_type val
, size_of_contents
, total_len
;
17000 htab_t cu_index_htab
;
17001 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
17003 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
17006 if (dwarf2_per_objfile
->using_index
)
17007 error (_("Cannot use an index to create the index"));
17009 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
17010 error (_("Cannot make an index when the file has multiple .debug_types sections"));
17012 if (stat (objfile
->name
, &st
) < 0)
17013 perror_with_name (objfile
->name
);
17015 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
17016 INDEX_SUFFIX
, (char *) NULL
);
17017 cleanup
= make_cleanup (xfree
, filename
);
17019 out_file
= fopen (filename
, "wb");
17021 error (_("Can't open `%s' for writing"), filename
);
17023 cleanup_filename
= filename
;
17024 make_cleanup (unlink_if_set
, &cleanup_filename
);
17026 symtab
= create_mapped_symtab ();
17027 make_cleanup (cleanup_mapped_symtab
, symtab
);
17029 obstack_init (&addr_obstack
);
17030 make_cleanup_obstack_free (&addr_obstack
);
17032 obstack_init (&cu_list
);
17033 make_cleanup_obstack_free (&cu_list
);
17035 obstack_init (&types_cu_list
);
17036 make_cleanup_obstack_free (&types_cu_list
);
17038 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
17039 NULL
, xcalloc
, xfree
);
17040 make_cleanup_htab_delete (psyms_seen
);
17042 /* While we're scanning CU's create a table that maps a psymtab pointer
17043 (which is what addrmap records) to its index (which is what is recorded
17044 in the index file). This will later be needed to write the address
17046 cu_index_htab
= htab_create_alloc (100,
17047 hash_psymtab_cu_index
,
17048 eq_psymtab_cu_index
,
17049 NULL
, xcalloc
, xfree
);
17050 make_cleanup_htab_delete (cu_index_htab
);
17051 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
17052 xmalloc (sizeof (struct psymtab_cu_index_map
)
17053 * dwarf2_per_objfile
->n_comp_units
);
17054 make_cleanup (xfree
, psymtab_cu_index_map
);
17056 /* The CU list is already sorted, so we don't need to do additional
17057 work here. Also, the debug_types entries do not appear in
17058 all_comp_units, but only in their own hash table. */
17059 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
17061 struct dwarf2_per_cu_data
*per_cu
17062 = dwarf2_per_objfile
->all_comp_units
[i
];
17063 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
17065 struct psymtab_cu_index_map
*map
;
17068 write_psymbols (symtab
,
17070 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
17071 psymtab
->n_global_syms
, i
,
17073 write_psymbols (symtab
,
17075 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
17076 psymtab
->n_static_syms
, i
,
17079 map
= &psymtab_cu_index_map
[i
];
17080 map
->psymtab
= psymtab
;
17082 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
17083 gdb_assert (slot
!= NULL
);
17084 gdb_assert (*slot
== NULL
);
17087 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
17088 per_cu
->offset
.sect_off
);
17089 obstack_grow (&cu_list
, val
, 8);
17090 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
17091 obstack_grow (&cu_list
, val
, 8);
17094 /* Dump the address map. */
17095 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
17097 /* Write out the .debug_type entries, if any. */
17098 if (dwarf2_per_objfile
->signatured_types
)
17100 struct signatured_type_index_data sig_data
;
17102 sig_data
.objfile
= objfile
;
17103 sig_data
.symtab
= symtab
;
17104 sig_data
.types_list
= &types_cu_list
;
17105 sig_data
.psyms_seen
= psyms_seen
;
17106 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
17107 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
17108 write_one_signatured_type
, &sig_data
);
17111 obstack_init (&constant_pool
);
17112 make_cleanup_obstack_free (&constant_pool
);
17113 obstack_init (&symtab_obstack
);
17114 make_cleanup_obstack_free (&symtab_obstack
);
17115 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
17117 obstack_init (&contents
);
17118 make_cleanup_obstack_free (&contents
);
17119 size_of_contents
= 6 * sizeof (offset_type
);
17120 total_len
= size_of_contents
;
17122 /* The version number. */
17123 val
= MAYBE_SWAP (6);
17124 obstack_grow (&contents
, &val
, sizeof (val
));
17126 /* The offset of the CU list from the start of the file. */
17127 val
= MAYBE_SWAP (total_len
);
17128 obstack_grow (&contents
, &val
, sizeof (val
));
17129 total_len
+= obstack_object_size (&cu_list
);
17131 /* The offset of the types CU list from the start of the file. */
17132 val
= MAYBE_SWAP (total_len
);
17133 obstack_grow (&contents
, &val
, sizeof (val
));
17134 total_len
+= obstack_object_size (&types_cu_list
);
17136 /* The offset of the address table from the start of the file. */
17137 val
= MAYBE_SWAP (total_len
);
17138 obstack_grow (&contents
, &val
, sizeof (val
));
17139 total_len
+= obstack_object_size (&addr_obstack
);
17141 /* The offset of the symbol table from the start of the file. */
17142 val
= MAYBE_SWAP (total_len
);
17143 obstack_grow (&contents
, &val
, sizeof (val
));
17144 total_len
+= obstack_object_size (&symtab_obstack
);
17146 /* The offset of the constant pool from the start of the file. */
17147 val
= MAYBE_SWAP (total_len
);
17148 obstack_grow (&contents
, &val
, sizeof (val
));
17149 total_len
+= obstack_object_size (&constant_pool
);
17151 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
17153 write_obstack (out_file
, &contents
);
17154 write_obstack (out_file
, &cu_list
);
17155 write_obstack (out_file
, &types_cu_list
);
17156 write_obstack (out_file
, &addr_obstack
);
17157 write_obstack (out_file
, &symtab_obstack
);
17158 write_obstack (out_file
, &constant_pool
);
17162 /* We want to keep the file, so we set cleanup_filename to NULL
17163 here. See unlink_if_set. */
17164 cleanup_filename
= NULL
;
17166 do_cleanups (cleanup
);
17169 /* Implementation of the `save gdb-index' command.
17171 Note that the file format used by this command is documented in the
17172 GDB manual. Any changes here must be documented there. */
17175 save_gdb_index_command (char *arg
, int from_tty
)
17177 struct objfile
*objfile
;
17180 error (_("usage: save gdb-index DIRECTORY"));
17182 ALL_OBJFILES (objfile
)
17186 /* If the objfile does not correspond to an actual file, skip it. */
17187 if (stat (objfile
->name
, &st
) < 0)
17190 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
17191 if (dwarf2_per_objfile
)
17193 volatile struct gdb_exception except
;
17195 TRY_CATCH (except
, RETURN_MASK_ERROR
)
17197 write_psymtabs_to_index (objfile
, arg
);
17199 if (except
.reason
< 0)
17200 exception_fprintf (gdb_stderr
, except
,
17201 _("Error while writing index for `%s': "),
17209 int dwarf2_always_disassemble
;
17212 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
17213 struct cmd_list_element
*c
, const char *value
)
17215 fprintf_filtered (file
,
17216 _("Whether to always disassemble "
17217 "DWARF expressions is %s.\n"),
17222 show_check_physname (struct ui_file
*file
, int from_tty
,
17223 struct cmd_list_element
*c
, const char *value
)
17225 fprintf_filtered (file
,
17226 _("Whether to check \"physname\" is %s.\n"),
17230 void _initialize_dwarf2_read (void);
17233 _initialize_dwarf2_read (void)
17235 struct cmd_list_element
*c
;
17237 dwarf2_objfile_data_key
17238 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
17240 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
17241 Set DWARF 2 specific variables.\n\
17242 Configure DWARF 2 variables such as the cache size"),
17243 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
17244 0/*allow-unknown*/, &maintenance_set_cmdlist
);
17246 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
17247 Show DWARF 2 specific variables\n\
17248 Show DWARF 2 variables such as the cache size"),
17249 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
17250 0/*allow-unknown*/, &maintenance_show_cmdlist
);
17252 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
17253 &dwarf2_max_cache_age
, _("\
17254 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
17255 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
17256 A higher limit means that cached compilation units will be stored\n\
17257 in memory longer, and more total memory will be used. Zero disables\n\
17258 caching, which can slow down startup."),
17260 show_dwarf2_max_cache_age
,
17261 &set_dwarf2_cmdlist
,
17262 &show_dwarf2_cmdlist
);
17264 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
17265 &dwarf2_always_disassemble
, _("\
17266 Set whether `info address' always disassembles DWARF expressions."), _("\
17267 Show whether `info address' always disassembles DWARF expressions."), _("\
17268 When enabled, DWARF expressions are always printed in an assembly-like\n\
17269 syntax. When disabled, expressions will be printed in a more\n\
17270 conversational style, when possible."),
17272 show_dwarf2_always_disassemble
,
17273 &set_dwarf2_cmdlist
,
17274 &show_dwarf2_cmdlist
);
17276 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
17277 Set debugging of the dwarf2 DIE reader."), _("\
17278 Show debugging of the dwarf2 DIE reader."), _("\
17279 When enabled (non-zero), DIEs are dumped after they are read in.\n\
17280 The value is the maximum depth to print."),
17283 &setdebuglist
, &showdebuglist
);
17285 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
17286 Set cross-checking of \"physname\" code against demangler."), _("\
17287 Show cross-checking of \"physname\" code against demangler."), _("\
17288 When enabled, GDB's internal \"physname\" code is checked against\n\
17290 NULL
, show_check_physname
,
17291 &setdebuglist
, &showdebuglist
);
17293 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
17295 Save a gdb-index file.\n\
17296 Usage: save gdb-index DIRECTORY"),
17298 set_cmd_completer (c
, filename_completer
);