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"
64 #include "gdbcore.h" /* for gnutarget */
65 #include "gdb/gdb-index.h"
69 #include "gdb_string.h"
70 #include "gdb_assert.h"
71 #include <sys/types.h>
78 #define MAP_FAILED ((void *) -1)
82 typedef struct symbol
*symbolp
;
85 /* When non-zero, print basic high level tracing messages.
86 This is in contrast to the low level DIE reading of dwarf2_die_debug. */
87 static int dwarf2_read_debug
= 0;
89 /* When non-zero, dump DIEs after they are read in. */
90 static int dwarf2_die_debug
= 0;
92 /* When non-zero, cross-check physname against demangler. */
93 static int check_physname
= 0;
95 /* When non-zero, do not reject deprecated .gdb_index sections. */
96 int use_deprecated_index_sections
= 0;
100 /* When set, the file that we're processing is known to have debugging
101 info for C++ namespaces. GCC 3.3.x did not produce this information,
102 but later versions do. */
104 static int processing_has_namespace_info
;
106 static const struct objfile_data
*dwarf2_objfile_data_key
;
108 struct dwarf2_section_info
113 /* Not NULL if the section was actually mmapped. */
115 /* Page aligned size of mmapped area. */
116 bfd_size_type map_len
;
117 /* True if we have tried to read this section. */
121 typedef struct dwarf2_section_info dwarf2_section_info_def
;
122 DEF_VEC_O (dwarf2_section_info_def
);
124 /* All offsets in the index are of this type. It must be
125 architecture-independent. */
126 typedef uint32_t offset_type
;
128 DEF_VEC_I (offset_type
);
130 /* Ensure only legit values are used. */
131 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
133 gdb_assert ((unsigned int) (value) <= 1); \
134 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
137 /* Ensure only legit values are used. */
138 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
140 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
141 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
142 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
145 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
146 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
148 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
149 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
152 /* A description of the mapped index. The file format is described in
153 a comment by the code that writes the index. */
156 /* Index data format version. */
159 /* The total length of the buffer. */
162 /* A pointer to the address table data. */
163 const gdb_byte
*address_table
;
165 /* Size of the address table data in bytes. */
166 offset_type address_table_size
;
168 /* The symbol table, implemented as a hash table. */
169 const offset_type
*symbol_table
;
171 /* Size in slots, each slot is 2 offset_types. */
172 offset_type symbol_table_slots
;
174 /* A pointer to the constant pool. */
175 const char *constant_pool
;
178 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
179 DEF_VEC_P (dwarf2_per_cu_ptr
);
181 /* Collection of data recorded per objfile.
182 This hangs off of dwarf2_objfile_data_key. */
184 struct dwarf2_per_objfile
186 struct dwarf2_section_info info
;
187 struct dwarf2_section_info abbrev
;
188 struct dwarf2_section_info line
;
189 struct dwarf2_section_info loc
;
190 struct dwarf2_section_info macinfo
;
191 struct dwarf2_section_info macro
;
192 struct dwarf2_section_info str
;
193 struct dwarf2_section_info ranges
;
194 struct dwarf2_section_info addr
;
195 struct dwarf2_section_info frame
;
196 struct dwarf2_section_info eh_frame
;
197 struct dwarf2_section_info gdb_index
;
199 VEC (dwarf2_section_info_def
) *types
;
202 struct objfile
*objfile
;
204 /* Table of all the compilation units. This is used to locate
205 the target compilation unit of a particular reference. */
206 struct dwarf2_per_cu_data
**all_comp_units
;
208 /* The number of compilation units in ALL_COMP_UNITS. */
211 /* The number of .debug_types-related CUs. */
214 /* The .debug_types-related CUs (TUs). */
215 struct signatured_type
**all_type_units
;
217 /* A chain of compilation units that are currently read in, so that
218 they can be freed later. */
219 struct dwarf2_per_cu_data
*read_in_chain
;
221 /* A table mapping .debug_types signatures to its signatured_type entry.
222 This is NULL if the .debug_types section hasn't been read in yet. */
223 htab_t signatured_types
;
225 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
226 This is NULL if the table hasn't been allocated yet. */
229 /* A flag indicating wether this objfile has a section loaded at a
231 int has_section_at_zero
;
233 /* True if we are using the mapped index,
234 or we are faking it for OBJF_READNOW's sake. */
235 unsigned char using_index
;
237 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
238 struct mapped_index
*index_table
;
240 /* When using index_table, this keeps track of all quick_file_names entries.
241 TUs can share line table entries with CUs or other TUs, and there can be
242 a lot more TUs than unique line tables, so we maintain a separate table
243 of all line table entries to support the sharing. */
244 htab_t quick_file_names_table
;
246 /* Set during partial symbol reading, to prevent queueing of full
248 int reading_partial_symbols
;
250 /* Table mapping type DIEs to their struct type *.
251 This is NULL if not allocated yet.
252 The mapping is done via (CU/TU signature + DIE offset) -> type. */
253 htab_t die_type_hash
;
255 /* The CUs we recently read. */
256 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
259 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
261 /* Default names of the debugging sections. */
263 /* Note that if the debugging section has been compressed, it might
264 have a name like .zdebug_info. */
266 static const struct dwarf2_debug_sections dwarf2_elf_names
=
268 { ".debug_info", ".zdebug_info" },
269 { ".debug_abbrev", ".zdebug_abbrev" },
270 { ".debug_line", ".zdebug_line" },
271 { ".debug_loc", ".zdebug_loc" },
272 { ".debug_macinfo", ".zdebug_macinfo" },
273 { ".debug_macro", ".zdebug_macro" },
274 { ".debug_str", ".zdebug_str" },
275 { ".debug_ranges", ".zdebug_ranges" },
276 { ".debug_types", ".zdebug_types" },
277 { ".debug_addr", ".zdebug_addr" },
278 { ".debug_frame", ".zdebug_frame" },
279 { ".eh_frame", NULL
},
280 { ".gdb_index", ".zgdb_index" },
284 /* List of DWO sections. */
286 static const struct dwo_section_names
288 struct dwarf2_section_names abbrev_dwo
;
289 struct dwarf2_section_names info_dwo
;
290 struct dwarf2_section_names line_dwo
;
291 struct dwarf2_section_names loc_dwo
;
292 struct dwarf2_section_names macinfo_dwo
;
293 struct dwarf2_section_names macro_dwo
;
294 struct dwarf2_section_names str_dwo
;
295 struct dwarf2_section_names str_offsets_dwo
;
296 struct dwarf2_section_names types_dwo
;
300 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
301 { ".debug_info.dwo", ".zdebug_info.dwo" },
302 { ".debug_line.dwo", ".zdebug_line.dwo" },
303 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
304 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
305 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
306 { ".debug_str.dwo", ".zdebug_str.dwo" },
307 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
308 { ".debug_types.dwo", ".zdebug_types.dwo" },
311 /* local data types */
313 /* The data in a compilation unit header, after target2host
314 translation, looks like this. */
315 struct comp_unit_head
319 unsigned char addr_size
;
320 unsigned char signed_addr_p
;
321 sect_offset abbrev_offset
;
323 /* Size of file offsets; either 4 or 8. */
324 unsigned int offset_size
;
326 /* Size of the length field; either 4 or 12. */
327 unsigned int initial_length_size
;
329 /* Offset to the first byte of this compilation unit header in the
330 .debug_info section, for resolving relative reference dies. */
333 /* Offset to first die in this cu from the start of the cu.
334 This will be the first byte following the compilation unit header. */
335 cu_offset first_die_offset
;
338 /* Type used for delaying computation of method physnames.
339 See comments for compute_delayed_physnames. */
340 struct delayed_method_info
342 /* The type to which the method is attached, i.e., its parent class. */
345 /* The index of the method in the type's function fieldlists. */
348 /* The index of the method in the fieldlist. */
351 /* The name of the DIE. */
354 /* The DIE associated with this method. */
355 struct die_info
*die
;
358 typedef struct delayed_method_info delayed_method_info
;
359 DEF_VEC_O (delayed_method_info
);
361 /* Internal state when decoding a particular compilation unit. */
364 /* The objfile containing this compilation unit. */
365 struct objfile
*objfile
;
367 /* The header of the compilation unit. */
368 struct comp_unit_head header
;
370 /* Base address of this compilation unit. */
371 CORE_ADDR base_address
;
373 /* Non-zero if base_address has been set. */
376 /* The language we are debugging. */
377 enum language language
;
378 const struct language_defn
*language_defn
;
380 const char *producer
;
382 /* The generic symbol table building routines have separate lists for
383 file scope symbols and all all other scopes (local scopes). So
384 we need to select the right one to pass to add_symbol_to_list().
385 We do it by keeping a pointer to the correct list in list_in_scope.
387 FIXME: The original dwarf code just treated the file scope as the
388 first local scope, and all other local scopes as nested local
389 scopes, and worked fine. Check to see if we really need to
390 distinguish these in buildsym.c. */
391 struct pending
**list_in_scope
;
393 /* The abbrev table for this CU.
394 Normally this points to the abbrev table in the objfile.
395 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
396 struct abbrev_table
*abbrev_table
;
398 /* Hash table holding all the loaded partial DIEs
399 with partial_die->offset.SECT_OFF as hash. */
402 /* Storage for things with the same lifetime as this read-in compilation
403 unit, including partial DIEs. */
404 struct obstack comp_unit_obstack
;
406 /* When multiple dwarf2_cu structures are living in memory, this field
407 chains them all together, so that they can be released efficiently.
408 We will probably also want a generation counter so that most-recently-used
409 compilation units are cached... */
410 struct dwarf2_per_cu_data
*read_in_chain
;
412 /* Backchain to our per_cu entry if the tree has been built. */
413 struct dwarf2_per_cu_data
*per_cu
;
415 /* How many compilation units ago was this CU last referenced? */
418 /* A hash table of DIE cu_offset for following references with
419 die_info->offset.sect_off as hash. */
422 /* Full DIEs if read in. */
423 struct die_info
*dies
;
425 /* A set of pointers to dwarf2_per_cu_data objects for compilation
426 units referenced by this one. Only set during full symbol processing;
427 partial symbol tables do not have dependencies. */
430 /* Header data from the line table, during full symbol processing. */
431 struct line_header
*line_header
;
433 /* A list of methods which need to have physnames computed
434 after all type information has been read. */
435 VEC (delayed_method_info
) *method_list
;
437 /* To be copied to symtab->call_site_htab. */
438 htab_t call_site_htab
;
440 /* Non-NULL if this CU came from a DWO file.
441 There is an invariant here that is important to remember:
442 Except for attributes copied from the top level DIE in the "main"
443 (or "stub") file in preparation for reading the DWO file
444 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
445 Either there isn't a DWO file (in which case this is NULL and the point
446 is moot), or there is and either we're not going to read it (in which
447 case this is NULL) or there is and we are reading it (in which case this
449 struct dwo_unit
*dwo_unit
;
451 /* The DW_AT_addr_base attribute if present, zero otherwise
452 (zero is a valid value though).
453 Note this value comes from the stub CU/TU's DIE. */
456 /* The DW_AT_ranges_base attribute if present, zero otherwise
457 (zero is a valid value though).
458 Note this value comes from the stub CU/TU's DIE.
459 Also note that the value is zero in the non-DWO case so this value can
460 be used without needing to know whether DWO files are in use or not. */
461 ULONGEST ranges_base
;
463 /* Mark used when releasing cached dies. */
464 unsigned int mark
: 1;
466 /* This CU references .debug_loc. See the symtab->locations_valid field.
467 This test is imperfect as there may exist optimized debug code not using
468 any location list and still facing inlining issues if handled as
469 unoptimized code. For a future better test see GCC PR other/32998. */
470 unsigned int has_loclist
: 1;
472 /* These cache the results for producer_is_gxx_lt_4_6 and producer_is_icc.
473 CHECKED_PRODUCER is set if both PRODUCER_IS_GXX_LT_4_6 and PRODUCER_IS_ICC
474 are valid. This information is cached because profiling CU expansion
475 showed excessive time spent in producer_is_gxx_lt_4_6. */
476 unsigned int checked_producer
: 1;
477 unsigned int producer_is_gxx_lt_4_6
: 1;
478 unsigned int producer_is_icc
: 1;
481 /* Persistent data held for a compilation unit, even when not
482 processing it. We put a pointer to this structure in the
483 read_symtab_private field of the psymtab. */
485 struct dwarf2_per_cu_data
487 /* The start offset and length of this compilation unit. 2**29-1
488 bytes should suffice to store the length of any compilation unit
489 - if it doesn't, GDB will fall over anyway.
490 NOTE: Unlike comp_unit_head.length, this length includes
492 If the DIE refers to a DWO file, this is always of the original die,
495 unsigned int length
: 29;
497 /* Flag indicating this compilation unit will be read in before
498 any of the current compilation units are processed. */
499 unsigned int queued
: 1;
501 /* This flag will be set when reading partial DIEs if we need to load
502 absolutely all DIEs for this compilation unit, instead of just the ones
503 we think are interesting. It gets set if we look for a DIE in the
504 hash table and don't find it. */
505 unsigned int load_all_dies
: 1;
507 /* Non-zero if this CU is from .debug_types. */
508 unsigned int is_debug_types
: 1;
510 /* The section this CU/TU lives in.
511 If the DIE refers to a DWO file, this is always the original die,
513 struct dwarf2_section_info
*info_or_types_section
;
515 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
516 of the CU cache it gets reset to NULL again. */
517 struct dwarf2_cu
*cu
;
519 /* The corresponding objfile.
520 Normally we can get the objfile from dwarf2_per_objfile.
521 However we can enter this file with just a "per_cu" handle. */
522 struct objfile
*objfile
;
524 /* When using partial symbol tables, the 'psymtab' field is active.
525 Otherwise the 'quick' field is active. */
528 /* The partial symbol table associated with this compilation unit,
529 or NULL for unread partial units. */
530 struct partial_symtab
*psymtab
;
532 /* Data needed by the "quick" functions. */
533 struct dwarf2_per_cu_quick_data
*quick
;
536 /* The CUs we import using DW_TAG_imported_unit. This is filled in
537 while reading psymtabs, used to compute the psymtab dependencies,
538 and then cleared. Then it is filled in again while reading full
539 symbols, and only deleted when the objfile is destroyed. */
540 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
543 /* Entry in the signatured_types hash table. */
545 struct signatured_type
547 /* The "per_cu" object of this type.
548 N.B.: This is the first member so that it's easy to convert pointers
550 struct dwarf2_per_cu_data per_cu
;
552 /* The type's signature. */
555 /* Offset in the TU of the type's DIE, as read from the TU header.
556 If the definition lives in a DWO file, this value is unusable. */
557 cu_offset type_offset_in_tu
;
559 /* Offset in the section of the type's DIE.
560 If the definition lives in a DWO file, this is the offset in the
561 .debug_types.dwo section.
562 The value is zero until the actual value is known.
563 Zero is otherwise not a valid section offset. */
564 sect_offset type_offset_in_section
;
567 /* These sections are what may appear in a "dwo" file. */
571 struct dwarf2_section_info abbrev
;
572 struct dwarf2_section_info info
;
573 struct dwarf2_section_info line
;
574 struct dwarf2_section_info loc
;
575 struct dwarf2_section_info macinfo
;
576 struct dwarf2_section_info macro
;
577 struct dwarf2_section_info str
;
578 struct dwarf2_section_info str_offsets
;
579 VEC (dwarf2_section_info_def
) *types
;
582 /* Common bits of DWO CUs/TUs. */
586 /* Backlink to the containing struct dwo_file. */
587 struct dwo_file
*dwo_file
;
589 /* The "id" that distinguishes this CU/TU.
590 .debug_info calls this "dwo_id", .debug_types calls this "signature".
591 Since signatures came first, we stick with it for consistency. */
594 /* The section this CU/TU lives in, in the DWO file. */
595 struct dwarf2_section_info
*info_or_types_section
;
597 /* Same as dwarf2_per_cu_data:{offset,length} but for the DWO section. */
601 /* For types, offset in the type's DIE of the type defined by this TU. */
602 cu_offset type_offset_in_tu
;
605 /* Data for one DWO file. */
609 /* The DW_AT_GNU_dwo_name attribute.
610 We don't manage space for this, it's an attribute. */
611 const char *dwo_name
;
613 /* The bfd, when the file is open. Otherwise this is NULL. */
616 /* Section info for this file. */
617 struct dwo_sections sections
;
619 /* Table of CUs in the file.
620 Each element is a struct dwo_unit. */
623 /* Table of TUs in the file.
624 Each element is a struct dwo_unit. */
628 /* Struct used to pass misc. parameters to read_die_and_children, et
629 al. which are used for both .debug_info and .debug_types dies.
630 All parameters here are unchanging for the life of the call. This
631 struct exists to abstract away the constant parameters of die reading. */
633 struct die_reader_specs
635 /* die_section->asection->owner. */
638 /* The CU of the DIE we are parsing. */
639 struct dwarf2_cu
*cu
;
641 /* Non-NULL if reading a DWO file. */
642 struct dwo_file
*dwo_file
;
644 /* The section the die comes from.
645 This is either .debug_info or .debug_types, or the .dwo variants. */
646 struct dwarf2_section_info
*die_section
;
648 /* die_section->buffer. */
651 /* The end of the buffer. */
652 const gdb_byte
*buffer_end
;
655 /* Type of function passed to init_cutu_and_read_dies, et.al. */
656 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
658 struct die_info
*comp_unit_die
,
662 /* The line number information for a compilation unit (found in the
663 .debug_line section) begins with a "statement program header",
664 which contains the following information. */
667 unsigned int total_length
;
668 unsigned short version
;
669 unsigned int header_length
;
670 unsigned char minimum_instruction_length
;
671 unsigned char maximum_ops_per_instruction
;
672 unsigned char default_is_stmt
;
674 unsigned char line_range
;
675 unsigned char opcode_base
;
677 /* standard_opcode_lengths[i] is the number of operands for the
678 standard opcode whose value is i. This means that
679 standard_opcode_lengths[0] is unused, and the last meaningful
680 element is standard_opcode_lengths[opcode_base - 1]. */
681 unsigned char *standard_opcode_lengths
;
683 /* The include_directories table. NOTE! These strings are not
684 allocated with xmalloc; instead, they are pointers into
685 debug_line_buffer. If you try to free them, `free' will get
687 unsigned int num_include_dirs
, include_dirs_size
;
690 /* The file_names table. NOTE! These strings are not allocated
691 with xmalloc; instead, they are pointers into debug_line_buffer.
692 Don't try to free them directly. */
693 unsigned int num_file_names
, file_names_size
;
697 unsigned int dir_index
;
698 unsigned int mod_time
;
700 int included_p
; /* Non-zero if referenced by the Line Number Program. */
701 struct symtab
*symtab
; /* The associated symbol table, if any. */
704 /* The start and end of the statement program following this
705 header. These point into dwarf2_per_objfile->line_buffer. */
706 gdb_byte
*statement_program_start
, *statement_program_end
;
709 /* When we construct a partial symbol table entry we only
710 need this much information. */
711 struct partial_die_info
713 /* Offset of this DIE. */
716 /* DWARF-2 tag for this DIE. */
717 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
719 /* Assorted flags describing the data found in this DIE. */
720 unsigned int has_children
: 1;
721 unsigned int is_external
: 1;
722 unsigned int is_declaration
: 1;
723 unsigned int has_type
: 1;
724 unsigned int has_specification
: 1;
725 unsigned int has_pc_info
: 1;
726 unsigned int may_be_inlined
: 1;
728 /* Flag set if the SCOPE field of this structure has been
730 unsigned int scope_set
: 1;
732 /* Flag set if the DIE has a byte_size attribute. */
733 unsigned int has_byte_size
: 1;
735 /* Flag set if any of the DIE's children are template arguments. */
736 unsigned int has_template_arguments
: 1;
738 /* Flag set if fixup_partial_die has been called on this die. */
739 unsigned int fixup_called
: 1;
741 /* The name of this DIE. Normally the value of DW_AT_name, but
742 sometimes a default name for unnamed DIEs. */
745 /* The linkage name, if present. */
746 const char *linkage_name
;
748 /* The scope to prepend to our children. This is generally
749 allocated on the comp_unit_obstack, so will disappear
750 when this compilation unit leaves the cache. */
753 /* Some data associated with the partial DIE. The tag determines
754 which field is live. */
757 /* The location description associated with this DIE, if any. */
758 struct dwarf_block
*locdesc
;
759 /* The offset of an import, for DW_TAG_imported_unit. */
763 /* If HAS_PC_INFO, the PC range associated with this DIE. */
767 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
768 DW_AT_sibling, if any. */
769 /* NOTE: This member isn't strictly necessary, read_partial_die could
770 return DW_AT_sibling values to its caller load_partial_dies. */
773 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
774 DW_AT_specification (or DW_AT_abstract_origin or
776 sect_offset spec_offset
;
778 /* Pointers to this DIE's parent, first child, and next sibling,
780 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
783 /* This data structure holds the information of an abbrev. */
786 unsigned int number
; /* number identifying abbrev */
787 enum dwarf_tag tag
; /* dwarf tag */
788 unsigned short has_children
; /* boolean */
789 unsigned short num_attrs
; /* number of attributes */
790 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
791 struct abbrev_info
*next
; /* next in chain */
796 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
797 ENUM_BITFIELD(dwarf_form
) form
: 16;
800 /* Size of abbrev_table.abbrev_hash_table. */
801 #define ABBREV_HASH_SIZE 121
803 /* Top level data structure to contain an abbreviation table. */
807 /* Where the abbrev table came from. */
808 struct dwarf2_section_info
*section
;
811 /* Storage for the abbrev table. */
812 struct obstack abbrev_obstack
;
814 /* Hash table of abbrevs.
815 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
816 It could be statically allocated, but the previous code didn't so we
818 struct abbrev_info
**abbrevs
;
821 /* Attributes have a name and a value. */
824 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
825 ENUM_BITFIELD(dwarf_form
) form
: 15;
827 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
828 field should be in u.str (existing only for DW_STRING) but it is kept
829 here for better struct attribute alignment. */
830 unsigned int string_is_canonical
: 1;
835 struct dwarf_block
*blk
;
839 struct signatured_type
*signatured_type
;
844 /* This data structure holds a complete die structure. */
847 /* DWARF-2 tag for this DIE. */
848 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
850 /* Number of attributes */
851 unsigned char num_attrs
;
853 /* True if we're presently building the full type name for the
854 type derived from this DIE. */
855 unsigned char building_fullname
: 1;
860 /* Offset in .debug_info or .debug_types section. */
863 /* The dies in a compilation unit form an n-ary tree. PARENT
864 points to this die's parent; CHILD points to the first child of
865 this node; and all the children of a given node are chained
866 together via their SIBLING fields. */
867 struct die_info
*child
; /* Its first child, if any. */
868 struct die_info
*sibling
; /* Its next sibling, if any. */
869 struct die_info
*parent
; /* Its parent, if any. */
871 /* An array of attributes, with NUM_ATTRS elements. There may be
872 zero, but it's not common and zero-sized arrays are not
873 sufficiently portable C. */
874 struct attribute attrs
[1];
877 /* Get at parts of an attribute structure. */
879 #define DW_STRING(attr) ((attr)->u.str)
880 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
881 #define DW_UNSND(attr) ((attr)->u.unsnd)
882 #define DW_BLOCK(attr) ((attr)->u.blk)
883 #define DW_SND(attr) ((attr)->u.snd)
884 #define DW_ADDR(attr) ((attr)->u.addr)
885 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
887 /* Blocks are a bunch of untyped bytes. */
892 /* Valid only if SIZE is not zero. */
896 #ifndef ATTR_ALLOC_CHUNK
897 #define ATTR_ALLOC_CHUNK 4
900 /* Allocate fields for structs, unions and enums in this size. */
901 #ifndef DW_FIELD_ALLOC_CHUNK
902 #define DW_FIELD_ALLOC_CHUNK 4
905 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
906 but this would require a corresponding change in unpack_field_as_long
908 static int bits_per_byte
= 8;
910 /* The routines that read and process dies for a C struct or C++ class
911 pass lists of data member fields and lists of member function fields
912 in an instance of a field_info structure, as defined below. */
915 /* List of data member and baseclasses fields. */
918 struct nextfield
*next
;
923 *fields
, *baseclasses
;
925 /* Number of fields (including baseclasses). */
928 /* Number of baseclasses. */
931 /* Set if the accesibility of one of the fields is not public. */
932 int non_public_fields
;
934 /* Member function fields array, entries are allocated in the order they
935 are encountered in the object file. */
938 struct nextfnfield
*next
;
939 struct fn_field fnfield
;
943 /* Member function fieldlist array, contains name of possibly overloaded
944 member function, number of overloaded member functions and a pointer
945 to the head of the member function field chain. */
950 struct nextfnfield
*head
;
954 /* Number of entries in the fnfieldlists array. */
957 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
958 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
959 struct typedef_field_list
961 struct typedef_field field
;
962 struct typedef_field_list
*next
;
965 unsigned typedef_field_list_count
;
968 /* One item on the queue of compilation units to read in full symbols
970 struct dwarf2_queue_item
972 struct dwarf2_per_cu_data
*per_cu
;
973 enum language pretend_language
;
974 struct dwarf2_queue_item
*next
;
977 /* The current queue. */
978 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
980 /* Loaded secondary compilation units are kept in memory until they
981 have not been referenced for the processing of this many
982 compilation units. Set this to zero to disable caching. Cache
983 sizes of up to at least twenty will improve startup time for
984 typical inter-CU-reference binaries, at an obvious memory cost. */
985 static int dwarf2_max_cache_age
= 5;
987 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
988 struct cmd_list_element
*c
, const char *value
)
990 fprintf_filtered (file
, _("The upper bound on the age of cached "
991 "dwarf2 compilation units is %s.\n"),
996 /* Various complaints about symbol reading that don't abort the process. */
999 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1001 complaint (&symfile_complaints
,
1002 _("statement list doesn't fit in .debug_line section"));
1006 dwarf2_debug_line_missing_file_complaint (void)
1008 complaint (&symfile_complaints
,
1009 _(".debug_line section has line data without a file"));
1013 dwarf2_debug_line_missing_end_sequence_complaint (void)
1015 complaint (&symfile_complaints
,
1016 _(".debug_line section has line "
1017 "program sequence without an end"));
1021 dwarf2_complex_location_expr_complaint (void)
1023 complaint (&symfile_complaints
, _("location expression too complex"));
1027 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1030 complaint (&symfile_complaints
,
1031 _("const value length mismatch for '%s', got %d, expected %d"),
1036 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1038 complaint (&symfile_complaints
,
1039 _("debug info runs off end of %s section"
1041 section
->asection
->name
,
1042 bfd_get_filename (section
->asection
->owner
));
1046 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1048 complaint (&symfile_complaints
,
1049 _("macro debug info contains a "
1050 "malformed macro definition:\n`%s'"),
1055 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1057 complaint (&symfile_complaints
,
1058 _("invalid attribute class or form for '%s' in '%s'"),
1062 /* local function prototypes */
1064 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1066 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
1069 static void dwarf2_find_base_address (struct die_info
*die
,
1070 struct dwarf2_cu
*cu
);
1072 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1074 static void scan_partial_symbols (struct partial_die_info
*,
1075 CORE_ADDR
*, CORE_ADDR
*,
1076 int, struct dwarf2_cu
*);
1078 static void add_partial_symbol (struct partial_die_info
*,
1079 struct dwarf2_cu
*);
1081 static void add_partial_namespace (struct partial_die_info
*pdi
,
1082 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1083 int need_pc
, struct dwarf2_cu
*cu
);
1085 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1086 CORE_ADDR
*highpc
, int need_pc
,
1087 struct dwarf2_cu
*cu
);
1089 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1090 struct dwarf2_cu
*cu
);
1092 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1093 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1094 int need_pc
, struct dwarf2_cu
*cu
);
1096 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
1098 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1100 static struct abbrev_info
*abbrev_table_lookup_abbrev
1101 (const struct abbrev_table
*, unsigned int);
1103 static struct abbrev_table
*abbrev_table_read_table
1104 (struct dwarf2_section_info
*, sect_offset
);
1106 static void abbrev_table_free (struct abbrev_table
*);
1108 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1109 struct dwarf2_section_info
*);
1111 static void dwarf2_free_abbrev_table (void *);
1113 static unsigned int peek_abbrev_code (bfd
*, gdb_byte
*);
1115 static struct partial_die_info
*load_partial_dies
1116 (const struct die_reader_specs
*, gdb_byte
*, int);
1118 static gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1119 struct partial_die_info
*,
1120 struct abbrev_info
*,
1124 static struct partial_die_info
*find_partial_die (sect_offset
,
1125 struct dwarf2_cu
*);
1127 static void fixup_partial_die (struct partial_die_info
*,
1128 struct dwarf2_cu
*);
1130 static gdb_byte
*read_attribute (const struct die_reader_specs
*,
1131 struct attribute
*, struct attr_abbrev
*,
1134 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
1136 static int read_1_signed_byte (bfd
*, gdb_byte
*);
1138 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
1140 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
1142 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
1144 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
1147 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
1149 static LONGEST read_checked_initial_length_and_offset
1150 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
1151 unsigned int *, unsigned int *);
1153 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
1156 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
1158 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
1160 static char *read_direct_string (bfd
*, gdb_byte
*, unsigned int *);
1162 static char *read_indirect_string (bfd
*, gdb_byte
*,
1163 const struct comp_unit_head
*,
1166 static ULONGEST
read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
1168 static LONGEST
read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
1170 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*, gdb_byte
*,
1173 static char *read_str_index (const struct die_reader_specs
*reader
,
1174 struct dwarf2_cu
*cu
, ULONGEST str_index
);
1176 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1178 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1179 struct dwarf2_cu
*);
1181 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1184 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1185 struct dwarf2_cu
*cu
);
1187 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1189 static struct die_info
*die_specification (struct die_info
*die
,
1190 struct dwarf2_cu
**);
1192 static void free_line_header (struct line_header
*lh
);
1194 static void add_file_name (struct line_header
*, char *, unsigned int,
1195 unsigned int, unsigned int);
1197 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1198 struct dwarf2_cu
*cu
);
1200 static void dwarf_decode_lines (struct line_header
*, const char *,
1201 struct dwarf2_cu
*, struct partial_symtab
*,
1204 static void dwarf2_start_subfile (char *, const char *, const char *);
1206 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1207 struct dwarf2_cu
*);
1209 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1210 struct dwarf2_cu
*, struct symbol
*);
1212 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
1213 struct dwarf2_cu
*);
1215 static void dwarf2_const_value_attr (struct attribute
*attr
,
1218 struct obstack
*obstack
,
1219 struct dwarf2_cu
*cu
, LONGEST
*value
,
1221 struct dwarf2_locexpr_baton
**baton
);
1223 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1225 static int need_gnat_info (struct dwarf2_cu
*);
1227 static struct type
*die_descriptive_type (struct die_info
*,
1228 struct dwarf2_cu
*);
1230 static void set_descriptive_type (struct type
*, struct die_info
*,
1231 struct dwarf2_cu
*);
1233 static struct type
*die_containing_type (struct die_info
*,
1234 struct dwarf2_cu
*);
1236 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1237 struct dwarf2_cu
*);
1239 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1241 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1243 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1245 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1246 const char *suffix
, int physname
,
1247 struct dwarf2_cu
*cu
);
1249 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1251 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1253 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1255 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1257 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1259 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1260 struct dwarf2_cu
*, struct partial_symtab
*);
1262 static int dwarf2_get_pc_bounds (struct die_info
*,
1263 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1264 struct partial_symtab
*);
1266 static void get_scope_pc_bounds (struct die_info
*,
1267 CORE_ADDR
*, CORE_ADDR
*,
1268 struct dwarf2_cu
*);
1270 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1271 CORE_ADDR
, struct dwarf2_cu
*);
1273 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1274 struct dwarf2_cu
*);
1276 static void dwarf2_attach_fields_to_type (struct field_info
*,
1277 struct type
*, struct dwarf2_cu
*);
1279 static void dwarf2_add_member_fn (struct field_info
*,
1280 struct die_info
*, struct type
*,
1281 struct dwarf2_cu
*);
1283 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1285 struct dwarf2_cu
*);
1287 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1289 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1291 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1293 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1295 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1297 static struct type
*read_module_type (struct die_info
*die
,
1298 struct dwarf2_cu
*cu
);
1300 static const char *namespace_name (struct die_info
*die
,
1301 int *is_anonymous
, struct dwarf2_cu
*);
1303 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1305 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1307 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1308 struct dwarf2_cu
*);
1310 static struct die_info
*read_die_and_children (const struct die_reader_specs
*,
1312 gdb_byte
**new_info_ptr
,
1313 struct die_info
*parent
);
1315 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1317 gdb_byte
**new_info_ptr
,
1318 struct die_info
*parent
);
1320 static gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1321 struct die_info
**, gdb_byte
*, int *, int);
1323 static gdb_byte
*read_full_die (const struct die_reader_specs
*,
1324 struct die_info
**, gdb_byte
*, int *);
1326 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1328 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1331 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1333 static const char *dwarf2_full_name (char *name
,
1334 struct die_info
*die
,
1335 struct dwarf2_cu
*cu
);
1337 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1338 struct dwarf2_cu
**);
1340 static const char *dwarf_tag_name (unsigned int);
1342 static const char *dwarf_attr_name (unsigned int);
1344 static const char *dwarf_form_name (unsigned int);
1346 static char *dwarf_bool_name (unsigned int);
1348 static const char *dwarf_type_encoding_name (unsigned int);
1350 static struct die_info
*sibling_die (struct die_info
*);
1352 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1354 static void dump_die_for_error (struct die_info
*);
1356 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1359 /*static*/ void dump_die (struct die_info
*, int max_level
);
1361 static void store_in_ref_table (struct die_info
*,
1362 struct dwarf2_cu
*);
1364 static int is_ref_attr (struct attribute
*);
1366 static sect_offset
dwarf2_get_ref_die_offset (struct attribute
*);
1368 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1370 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1372 struct dwarf2_cu
**);
1374 static struct die_info
*follow_die_ref (struct die_info
*,
1376 struct dwarf2_cu
**);
1378 static struct die_info
*follow_die_sig (struct die_info
*,
1380 struct dwarf2_cu
**);
1382 static struct signatured_type
*lookup_signatured_type_at_offset
1383 (struct objfile
*objfile
,
1384 struct dwarf2_section_info
*section
, sect_offset offset
);
1386 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1388 static void read_signatured_type (struct signatured_type
*);
1390 /* memory allocation interface */
1392 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1394 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1396 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int,
1399 static int attr_form_is_block (struct attribute
*);
1401 static int attr_form_is_section_offset (struct attribute
*);
1403 static int attr_form_is_constant (struct attribute
*);
1405 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1406 struct dwarf2_loclist_baton
*baton
,
1407 struct attribute
*attr
);
1409 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1411 struct dwarf2_cu
*cu
);
1413 static gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1415 struct abbrev_info
*abbrev
);
1417 static void free_stack_comp_unit (void *);
1419 static hashval_t
partial_die_hash (const void *item
);
1421 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1423 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1424 (sect_offset offset
, struct objfile
*objfile
);
1426 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1427 struct dwarf2_per_cu_data
*per_cu
);
1429 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1430 struct die_info
*comp_unit_die
,
1431 enum language pretend_language
);
1433 static void free_heap_comp_unit (void *);
1435 static void free_cached_comp_units (void *);
1437 static void age_cached_comp_units (void);
1439 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1441 static struct type
*set_die_type (struct die_info
*, struct type
*,
1442 struct dwarf2_cu
*);
1444 static void create_all_comp_units (struct objfile
*);
1446 static int create_all_type_units (struct objfile
*);
1448 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1451 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1454 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1455 struct dwarf2_per_cu_data
*);
1457 static void dwarf2_mark (struct dwarf2_cu
*);
1459 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1461 static struct type
*get_die_type_at_offset (sect_offset
,
1462 struct dwarf2_per_cu_data
*per_cu
);
1464 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1466 static void dwarf2_release_queue (void *dummy
);
1468 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1469 enum language pretend_language
);
1471 static int maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
1472 struct dwarf2_per_cu_data
*per_cu
,
1473 enum language pretend_language
);
1475 static void process_queue (void);
1477 static void find_file_and_directory (struct die_info
*die
,
1478 struct dwarf2_cu
*cu
,
1479 char **name
, char **comp_dir
);
1481 static char *file_full_name (int file
, struct line_header
*lh
,
1482 const char *comp_dir
);
1484 static void init_cutu_and_read_dies
1485 (struct dwarf2_per_cu_data
*this_cu
, int use_existing_cu
, int keep
,
1486 die_reader_func_ftype
*die_reader_func
, void *data
);
1488 static void init_cutu_and_read_dies_simple
1489 (struct dwarf2_per_cu_data
*this_cu
,
1490 die_reader_func_ftype
*die_reader_func
, void *data
);
1492 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1494 static void process_psymtab_comp_unit (struct dwarf2_per_cu_data
*, int);
1496 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1498 static struct dwo_unit
*lookup_dwo_comp_unit
1499 (struct dwarf2_per_cu_data
*, char *, const char *, ULONGEST
);
1501 static struct dwo_unit
*lookup_dwo_type_unit
1502 (struct signatured_type
*, char *, const char *);
1504 static void free_dwo_file_cleanup (void *);
1506 static void munmap_section_buffer (struct dwarf2_section_info
*);
1508 static void process_cu_includes (void);
1512 /* Convert VALUE between big- and little-endian. */
1514 byte_swap (offset_type value
)
1518 result
= (value
& 0xff) << 24;
1519 result
|= (value
& 0xff00) << 8;
1520 result
|= (value
& 0xff0000) >> 8;
1521 result
|= (value
& 0xff000000) >> 24;
1525 #define MAYBE_SWAP(V) byte_swap (V)
1528 #define MAYBE_SWAP(V) (V)
1529 #endif /* WORDS_BIGENDIAN */
1531 /* The suffix for an index file. */
1532 #define INDEX_SUFFIX ".gdb-index"
1534 static const char *dwarf2_physname (char *name
, struct die_info
*die
,
1535 struct dwarf2_cu
*cu
);
1537 /* Try to locate the sections we need for DWARF 2 debugging
1538 information and return true if we have enough to do something.
1539 NAMES points to the dwarf2 section names, or is NULL if the standard
1540 ELF names are used. */
1543 dwarf2_has_info (struct objfile
*objfile
,
1544 const struct dwarf2_debug_sections
*names
)
1546 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1547 if (!dwarf2_per_objfile
)
1549 /* Initialize per-objfile state. */
1550 struct dwarf2_per_objfile
*data
1551 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1553 memset (data
, 0, sizeof (*data
));
1554 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1555 dwarf2_per_objfile
= data
;
1557 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
1559 dwarf2_per_objfile
->objfile
= objfile
;
1561 return (dwarf2_per_objfile
->info
.asection
!= NULL
1562 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1565 /* When loading sections, we look either for uncompressed section or for
1566 compressed section names. */
1569 section_is_p (const char *section_name
,
1570 const struct dwarf2_section_names
*names
)
1572 if (names
->normal
!= NULL
1573 && strcmp (section_name
, names
->normal
) == 0)
1575 if (names
->compressed
!= NULL
1576 && strcmp (section_name
, names
->compressed
) == 0)
1581 /* This function is mapped across the sections and remembers the
1582 offset and size of each of the debugging sections we are interested
1586 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
1588 const struct dwarf2_debug_sections
*names
;
1591 names
= &dwarf2_elf_names
;
1593 names
= (const struct dwarf2_debug_sections
*) vnames
;
1595 if (section_is_p (sectp
->name
, &names
->info
))
1597 dwarf2_per_objfile
->info
.asection
= sectp
;
1598 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1600 else if (section_is_p (sectp
->name
, &names
->abbrev
))
1602 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1603 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1605 else if (section_is_p (sectp
->name
, &names
->line
))
1607 dwarf2_per_objfile
->line
.asection
= sectp
;
1608 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1610 else if (section_is_p (sectp
->name
, &names
->loc
))
1612 dwarf2_per_objfile
->loc
.asection
= sectp
;
1613 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1615 else if (section_is_p (sectp
->name
, &names
->macinfo
))
1617 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1618 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1620 else if (section_is_p (sectp
->name
, &names
->macro
))
1622 dwarf2_per_objfile
->macro
.asection
= sectp
;
1623 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
1625 else if (section_is_p (sectp
->name
, &names
->str
))
1627 dwarf2_per_objfile
->str
.asection
= sectp
;
1628 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1630 else if (section_is_p (sectp
->name
, &names
->addr
))
1632 dwarf2_per_objfile
->addr
.asection
= sectp
;
1633 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
1635 else if (section_is_p (sectp
->name
, &names
->frame
))
1637 dwarf2_per_objfile
->frame
.asection
= sectp
;
1638 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1640 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
1642 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
1644 if (aflag
& SEC_HAS_CONTENTS
)
1646 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1647 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1650 else if (section_is_p (sectp
->name
, &names
->ranges
))
1652 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1653 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1655 else if (section_is_p (sectp
->name
, &names
->types
))
1657 struct dwarf2_section_info type_section
;
1659 memset (&type_section
, 0, sizeof (type_section
));
1660 type_section
.asection
= sectp
;
1661 type_section
.size
= bfd_get_section_size (sectp
);
1663 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
1666 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
1668 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1669 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1672 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1673 && bfd_section_vma (abfd
, sectp
) == 0)
1674 dwarf2_per_objfile
->has_section_at_zero
= 1;
1677 /* Decompress a section that was compressed using zlib. Store the
1678 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1681 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1682 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1684 bfd
*abfd
= sectp
->owner
;
1686 error (_("Support for zlib-compressed DWARF data (from '%s') "
1687 "is disabled in this copy of GDB"),
1688 bfd_get_filename (abfd
));
1690 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1691 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1692 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1693 bfd_size_type uncompressed_size
;
1694 gdb_byte
*uncompressed_buffer
;
1697 int header_size
= 12;
1699 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1700 || bfd_bread (compressed_buffer
,
1701 compressed_size
, abfd
) != compressed_size
)
1702 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1703 bfd_get_filename (abfd
));
1705 /* Read the zlib header. In this case, it should be "ZLIB" followed
1706 by the uncompressed section size, 8 bytes in big-endian order. */
1707 if (compressed_size
< header_size
1708 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1709 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1710 bfd_get_filename (abfd
));
1711 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1712 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1713 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1714 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1715 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1716 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1717 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1718 uncompressed_size
+= compressed_buffer
[11];
1720 /* It is possible the section consists of several compressed
1721 buffers concatenated together, so we uncompress in a loop. */
1725 strm
.avail_in
= compressed_size
- header_size
;
1726 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1727 strm
.avail_out
= uncompressed_size
;
1728 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1730 rc
= inflateInit (&strm
);
1731 while (strm
.avail_in
> 0)
1734 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1735 bfd_get_filename (abfd
), rc
);
1736 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1737 + (uncompressed_size
- strm
.avail_out
));
1738 rc
= inflate (&strm
, Z_FINISH
);
1739 if (rc
!= Z_STREAM_END
)
1740 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1741 bfd_get_filename (abfd
), rc
);
1742 rc
= inflateReset (&strm
);
1744 rc
= inflateEnd (&strm
);
1746 || strm
.avail_out
!= 0)
1747 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1748 bfd_get_filename (abfd
), rc
);
1750 do_cleanups (cleanup
);
1751 *outbuf
= uncompressed_buffer
;
1752 *outsize
= uncompressed_size
;
1756 /* A helper function that decides whether a section is empty,
1760 dwarf2_section_empty_p (struct dwarf2_section_info
*info
)
1762 return info
->asection
== NULL
|| info
->size
== 0;
1765 /* Read the contents of the section INFO.
1766 OBJFILE is the main object file, but not necessarily the file where
1767 the section comes from. E.g., for DWO files INFO->asection->owner
1768 is the bfd of the DWO file.
1769 If the section is compressed, uncompress it before returning. */
1772 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1774 asection
*sectp
= info
->asection
;
1776 gdb_byte
*buf
, *retbuf
;
1777 unsigned char header
[4];
1781 info
->buffer
= NULL
;
1782 info
->map_addr
= NULL
;
1785 if (dwarf2_section_empty_p (info
))
1788 /* Note that ABFD may not be from OBJFILE, e.g. a DWO section. */
1789 abfd
= sectp
->owner
;
1791 /* Check if the file has a 4-byte header indicating compression. */
1792 if (info
->size
> sizeof (header
)
1793 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1794 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1796 /* Upon decompression, update the buffer and its size. */
1797 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1799 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1807 pagesize
= getpagesize ();
1809 /* Only try to mmap sections which are large enough: we don't want to
1810 waste space due to fragmentation. Also, only try mmap for sections
1811 without relocations. */
1813 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1815 info
->buffer
= bfd_mmap (abfd
, 0, info
->size
, PROT_READ
,
1816 MAP_PRIVATE
, sectp
->filepos
,
1817 &info
->map_addr
, &info
->map_len
);
1819 if ((caddr_t
)info
->buffer
!= MAP_FAILED
)
1821 #if HAVE_POSIX_MADVISE
1822 posix_madvise (info
->map_addr
, info
->map_len
, POSIX_MADV_WILLNEED
);
1829 /* If we get here, we are a normal, not-compressed section. */
1831 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1833 /* When debugging .o files, we may need to apply relocations; see
1834 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1835 We never compress sections in .o files, so we only need to
1836 try this when the section is not compressed. */
1837 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1840 info
->buffer
= retbuf
;
1844 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1845 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1846 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1847 bfd_get_filename (abfd
));
1850 /* A helper function that returns the size of a section in a safe way.
1851 If you are positive that the section has been read before using the
1852 size, then it is safe to refer to the dwarf2_section_info object's
1853 "size" field directly. In other cases, you must call this
1854 function, because for compressed sections the size field is not set
1855 correctly until the section has been read. */
1857 static bfd_size_type
1858 dwarf2_section_size (struct objfile
*objfile
,
1859 struct dwarf2_section_info
*info
)
1862 dwarf2_read_section (objfile
, info
);
1866 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1870 dwarf2_get_section_info (struct objfile
*objfile
,
1871 enum dwarf2_section_enum sect
,
1872 asection
**sectp
, gdb_byte
**bufp
,
1873 bfd_size_type
*sizep
)
1875 struct dwarf2_per_objfile
*data
1876 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1877 struct dwarf2_section_info
*info
;
1879 /* We may see an objfile without any DWARF, in which case we just
1890 case DWARF2_DEBUG_FRAME
:
1891 info
= &data
->frame
;
1893 case DWARF2_EH_FRAME
:
1894 info
= &data
->eh_frame
;
1897 gdb_assert_not_reached ("unexpected section");
1900 dwarf2_read_section (objfile
, info
);
1902 *sectp
= info
->asection
;
1903 *bufp
= info
->buffer
;
1904 *sizep
= info
->size
;
1908 /* DWARF quick_symbols_functions support. */
1910 /* TUs can share .debug_line entries, and there can be a lot more TUs than
1911 unique line tables, so we maintain a separate table of all .debug_line
1912 derived entries to support the sharing.
1913 All the quick functions need is the list of file names. We discard the
1914 line_header when we're done and don't need to record it here. */
1915 struct quick_file_names
1917 /* The offset in .debug_line of the line table. We hash on this. */
1918 unsigned int offset
;
1920 /* The number of entries in file_names, real_names. */
1921 unsigned int num_file_names
;
1923 /* The file names from the line table, after being run through
1925 const char **file_names
;
1927 /* The file names from the line table after being run through
1928 gdb_realpath. These are computed lazily. */
1929 const char **real_names
;
1932 /* When using the index (and thus not using psymtabs), each CU has an
1933 object of this type. This is used to hold information needed by
1934 the various "quick" methods. */
1935 struct dwarf2_per_cu_quick_data
1937 /* The file table. This can be NULL if there was no file table
1938 or it's currently not read in.
1939 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
1940 struct quick_file_names
*file_names
;
1942 /* The corresponding symbol table. This is NULL if symbols for this
1943 CU have not yet been read. */
1944 struct symtab
*symtab
;
1946 /* A temporary mark bit used when iterating over all CUs in
1947 expand_symtabs_matching. */
1948 unsigned int mark
: 1;
1950 /* True if we've tried to read the file table and found there isn't one.
1951 There will be no point in trying to read it again next time. */
1952 unsigned int no_file_data
: 1;
1955 /* Hash function for a quick_file_names. */
1958 hash_file_name_entry (const void *e
)
1960 const struct quick_file_names
*file_data
= e
;
1962 return file_data
->offset
;
1965 /* Equality function for a quick_file_names. */
1968 eq_file_name_entry (const void *a
, const void *b
)
1970 const struct quick_file_names
*ea
= a
;
1971 const struct quick_file_names
*eb
= b
;
1973 return ea
->offset
== eb
->offset
;
1976 /* Delete function for a quick_file_names. */
1979 delete_file_name_entry (void *e
)
1981 struct quick_file_names
*file_data
= e
;
1984 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
1986 xfree ((void*) file_data
->file_names
[i
]);
1987 if (file_data
->real_names
)
1988 xfree ((void*) file_data
->real_names
[i
]);
1991 /* The space for the struct itself lives on objfile_obstack,
1992 so we don't free it here. */
1995 /* Create a quick_file_names hash table. */
1998 create_quick_file_names_table (unsigned int nr_initial_entries
)
2000 return htab_create_alloc (nr_initial_entries
,
2001 hash_file_name_entry
, eq_file_name_entry
,
2002 delete_file_name_entry
, xcalloc
, xfree
);
2005 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2006 have to be created afterwards. You should call age_cached_comp_units after
2007 processing PER_CU->CU. dw2_setup must have been already called. */
2010 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2012 if (per_cu
->is_debug_types
)
2013 load_full_type_unit (per_cu
);
2015 load_full_comp_unit (per_cu
, language_minimal
);
2017 gdb_assert (per_cu
->cu
!= NULL
);
2019 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2022 /* Read in the symbols for PER_CU. */
2025 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2027 struct cleanup
*back_to
;
2029 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2031 if (dwarf2_per_objfile
->using_index
2032 ? per_cu
->v
.quick
->symtab
== NULL
2033 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2035 queue_comp_unit (per_cu
, language_minimal
);
2041 /* Age the cache, releasing compilation units that have not
2042 been used recently. */
2043 age_cached_comp_units ();
2045 do_cleanups (back_to
);
2048 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2049 the objfile from which this CU came. Returns the resulting symbol
2052 static struct symtab
*
2053 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2055 gdb_assert (dwarf2_per_objfile
->using_index
);
2056 if (!per_cu
->v
.quick
->symtab
)
2058 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2059 increment_reading_symtab ();
2060 dw2_do_instantiate_symtab (per_cu
);
2061 process_cu_includes ();
2062 do_cleanups (back_to
);
2064 return per_cu
->v
.quick
->symtab
;
2067 /* Return the CU given its index. */
2069 static struct dwarf2_per_cu_data
*
2070 dw2_get_cu (int index
)
2072 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2074 index
-= dwarf2_per_objfile
->n_comp_units
;
2075 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2077 return dwarf2_per_objfile
->all_comp_units
[index
];
2080 /* A helper function that knows how to read a 64-bit value in a way
2081 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
2085 extract_cu_value (const char *bytes
, ULONGEST
*result
)
2087 if (sizeof (ULONGEST
) < 8)
2091 /* Ignore the upper 4 bytes if they are all zero. */
2092 for (i
= 0; i
< 4; ++i
)
2093 if (bytes
[i
+ 4] != 0)
2096 *result
= extract_unsigned_integer (bytes
, 4, BFD_ENDIAN_LITTLE
);
2099 *result
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2103 /* Read the CU list from the mapped index, and use it to create all
2104 the CU objects for this objfile. Return 0 if something went wrong,
2105 1 if everything went ok. */
2108 create_cus_from_index (struct objfile
*objfile
, const gdb_byte
*cu_list
,
2109 offset_type cu_list_elements
)
2113 dwarf2_per_objfile
->n_comp_units
= cu_list_elements
/ 2;
2114 dwarf2_per_objfile
->all_comp_units
2115 = obstack_alloc (&objfile
->objfile_obstack
,
2116 dwarf2_per_objfile
->n_comp_units
2117 * sizeof (struct dwarf2_per_cu_data
*));
2119 for (i
= 0; i
< cu_list_elements
; i
+= 2)
2121 struct dwarf2_per_cu_data
*the_cu
;
2122 ULONGEST offset
, length
;
2124 if (!extract_cu_value (cu_list
, &offset
)
2125 || !extract_cu_value (cu_list
+ 8, &length
))
2129 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2130 struct dwarf2_per_cu_data
);
2131 the_cu
->offset
.sect_off
= offset
;
2132 the_cu
->length
= length
;
2133 the_cu
->objfile
= objfile
;
2134 the_cu
->info_or_types_section
= &dwarf2_per_objfile
->info
;
2135 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2136 struct dwarf2_per_cu_quick_data
);
2137 dwarf2_per_objfile
->all_comp_units
[i
/ 2] = the_cu
;
2143 /* Create the signatured type hash table from the index. */
2146 create_signatured_type_table_from_index (struct objfile
*objfile
,
2147 struct dwarf2_section_info
*section
,
2148 const gdb_byte
*bytes
,
2149 offset_type elements
)
2152 htab_t sig_types_hash
;
2154 dwarf2_per_objfile
->n_type_units
= elements
/ 3;
2155 dwarf2_per_objfile
->all_type_units
2156 = obstack_alloc (&objfile
->objfile_obstack
,
2157 dwarf2_per_objfile
->n_type_units
2158 * sizeof (struct signatured_type
*));
2160 sig_types_hash
= allocate_signatured_type_table (objfile
);
2162 for (i
= 0; i
< elements
; i
+= 3)
2164 struct signatured_type
*sig_type
;
2165 ULONGEST offset
, type_offset_in_tu
, signature
;
2168 if (!extract_cu_value (bytes
, &offset
)
2169 || !extract_cu_value (bytes
+ 8, &type_offset_in_tu
))
2171 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2174 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2175 struct signatured_type
);
2176 sig_type
->signature
= signature
;
2177 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2178 sig_type
->per_cu
.is_debug_types
= 1;
2179 sig_type
->per_cu
.info_or_types_section
= section
;
2180 sig_type
->per_cu
.offset
.sect_off
= offset
;
2181 sig_type
->per_cu
.objfile
= objfile
;
2182 sig_type
->per_cu
.v
.quick
2183 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2184 struct dwarf2_per_cu_quick_data
);
2186 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2189 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2192 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2197 /* Read the address map data from the mapped index, and use it to
2198 populate the objfile's psymtabs_addrmap. */
2201 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2203 const gdb_byte
*iter
, *end
;
2204 struct obstack temp_obstack
;
2205 struct addrmap
*mutable_map
;
2206 struct cleanup
*cleanup
;
2209 obstack_init (&temp_obstack
);
2210 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2211 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2213 iter
= index
->address_table
;
2214 end
= iter
+ index
->address_table_size
;
2216 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2220 ULONGEST hi
, lo
, cu_index
;
2221 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2223 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2225 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2228 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
2229 dw2_get_cu (cu_index
));
2232 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2233 &objfile
->objfile_obstack
);
2234 do_cleanups (cleanup
);
2237 /* The hash function for strings in the mapped index. This is the same as
2238 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2239 implementation. This is necessary because the hash function is tied to the
2240 format of the mapped index file. The hash values do not have to match with
2243 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2246 mapped_index_string_hash (int index_version
, const void *p
)
2248 const unsigned char *str
= (const unsigned char *) p
;
2252 while ((c
= *str
++) != 0)
2254 if (index_version
>= 5)
2256 r
= r
* 67 + c
- 113;
2262 /* Find a slot in the mapped index INDEX for the object named NAME.
2263 If NAME is found, set *VEC_OUT to point to the CU vector in the
2264 constant pool and return 1. If NAME cannot be found, return 0. */
2267 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2268 offset_type
**vec_out
)
2270 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2272 offset_type slot
, step
;
2273 int (*cmp
) (const char *, const char *);
2275 if (current_language
->la_language
== language_cplus
2276 || current_language
->la_language
== language_java
2277 || current_language
->la_language
== language_fortran
)
2279 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2281 const char *paren
= strchr (name
, '(');
2287 dup
= xmalloc (paren
- name
+ 1);
2288 memcpy (dup
, name
, paren
- name
);
2289 dup
[paren
- name
] = 0;
2291 make_cleanup (xfree
, dup
);
2296 /* Index version 4 did not support case insensitive searches. But the
2297 indices for case insensitive languages are built in lowercase, therefore
2298 simulate our NAME being searched is also lowercased. */
2299 hash
= mapped_index_string_hash ((index
->version
== 4
2300 && case_sensitivity
== case_sensitive_off
2301 ? 5 : index
->version
),
2304 slot
= hash
& (index
->symbol_table_slots
- 1);
2305 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
2306 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2310 /* Convert a slot number to an offset into the table. */
2311 offset_type i
= 2 * slot
;
2313 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
2315 do_cleanups (back_to
);
2319 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
2320 if (!cmp (name
, str
))
2322 *vec_out
= (offset_type
*) (index
->constant_pool
2323 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
2324 do_cleanups (back_to
);
2328 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
2332 /* Read the index file. If everything went ok, initialize the "quick"
2333 elements of all the CUs and return 1. Otherwise, return 0. */
2336 dwarf2_read_index (struct objfile
*objfile
)
2339 struct mapped_index
*map
;
2340 offset_type
*metadata
;
2341 const gdb_byte
*cu_list
;
2342 const gdb_byte
*types_list
= NULL
;
2343 offset_type version
, cu_list_elements
;
2344 offset_type types_list_elements
= 0;
2347 if (dwarf2_section_empty_p (&dwarf2_per_objfile
->gdb_index
))
2350 /* Older elfutils strip versions could keep the section in the main
2351 executable while splitting it for the separate debug info file. */
2352 if ((bfd_get_file_flags (dwarf2_per_objfile
->gdb_index
.asection
)
2353 & SEC_HAS_CONTENTS
) == 0)
2356 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->gdb_index
);
2358 addr
= dwarf2_per_objfile
->gdb_index
.buffer
;
2359 /* Version check. */
2360 version
= MAYBE_SWAP (*(offset_type
*) addr
);
2361 /* Versions earlier than 3 emitted every copy of a psymbol. This
2362 causes the index to behave very poorly for certain requests. Version 3
2363 contained incomplete addrmap. So, it seems better to just ignore such
2367 static int warning_printed
= 0;
2368 if (!warning_printed
)
2370 warning (_("Skipping obsolete .gdb_index section in %s."),
2372 warning_printed
= 1;
2376 /* Index version 4 uses a different hash function than index version
2379 Versions earlier than 6 did not emit psymbols for inlined
2380 functions. Using these files will cause GDB not to be able to
2381 set breakpoints on inlined functions by name, so we ignore these
2382 indices unless the --use-deprecated-index-sections command line
2383 option was supplied. */
2384 if (version
< 6 && !use_deprecated_index_sections
)
2386 static int warning_printed
= 0;
2387 if (!warning_printed
)
2389 warning (_("Skipping deprecated .gdb_index section in %s, pass "
2390 "--use-deprecated-index-sections to use them anyway"),
2392 warning_printed
= 1;
2396 /* Indexes with higher version than the one supported by GDB may be no
2397 longer backward compatible. */
2401 map
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct mapped_index
);
2402 map
->version
= version
;
2403 map
->total_size
= dwarf2_per_objfile
->gdb_index
.size
;
2405 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2408 cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2409 cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2413 types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2414 types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2415 - MAYBE_SWAP (metadata
[i
]))
2419 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2420 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
2421 - MAYBE_SWAP (metadata
[i
]));
2424 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
2425 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
2426 - MAYBE_SWAP (metadata
[i
]))
2427 / (2 * sizeof (offset_type
)));
2430 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
2432 /* Don't use the index if it's empty. */
2433 if (map
->symbol_table_slots
== 0)
2436 if (!create_cus_from_index (objfile
, cu_list
, cu_list_elements
))
2439 if (types_list_elements
)
2441 struct dwarf2_section_info
*section
;
2443 /* We can only handle a single .debug_types when we have an
2445 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
2448 section
= VEC_index (dwarf2_section_info_def
,
2449 dwarf2_per_objfile
->types
, 0);
2451 if (!create_signatured_type_table_from_index (objfile
, section
,
2453 types_list_elements
))
2457 create_addrmap_from_index (objfile
, map
);
2459 dwarf2_per_objfile
->index_table
= map
;
2460 dwarf2_per_objfile
->using_index
= 1;
2461 dwarf2_per_objfile
->quick_file_names_table
=
2462 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2467 /* A helper for the "quick" functions which sets the global
2468 dwarf2_per_objfile according to OBJFILE. */
2471 dw2_setup (struct objfile
*objfile
)
2473 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2474 gdb_assert (dwarf2_per_objfile
);
2477 /* die_reader_func for dw2_get_file_names. */
2480 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
2482 struct die_info
*comp_unit_die
,
2486 struct dwarf2_cu
*cu
= reader
->cu
;
2487 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
2488 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2489 struct line_header
*lh
;
2490 struct attribute
*attr
;
2492 char *name
, *comp_dir
;
2494 struct quick_file_names
*qfn
;
2495 unsigned int line_offset
;
2497 /* Our callers never want to match partial units -- instead they
2498 will match the enclosing full CU. */
2499 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
2501 this_cu
->v
.quick
->no_file_data
= 1;
2509 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
2512 struct quick_file_names find_entry
;
2514 line_offset
= DW_UNSND (attr
);
2516 /* We may have already read in this line header (TU line header sharing).
2517 If we have we're done. */
2518 find_entry
.offset
= line_offset
;
2519 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
2520 &find_entry
, INSERT
);
2523 this_cu
->v
.quick
->file_names
= *slot
;
2527 lh
= dwarf_decode_line_header (line_offset
, cu
);
2531 this_cu
->v
.quick
->no_file_data
= 1;
2535 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
2536 qfn
->offset
= line_offset
;
2537 gdb_assert (slot
!= NULL
);
2540 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
2542 qfn
->num_file_names
= lh
->num_file_names
;
2543 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
2544 lh
->num_file_names
* sizeof (char *));
2545 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2546 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2547 qfn
->real_names
= NULL
;
2549 free_line_header (lh
);
2551 this_cu
->v
.quick
->file_names
= qfn
;
2554 /* A helper for the "quick" functions which attempts to read the line
2555 table for THIS_CU. */
2557 static struct quick_file_names
*
2558 dw2_get_file_names (struct objfile
*objfile
,
2559 struct dwarf2_per_cu_data
*this_cu
)
2561 if (this_cu
->v
.quick
->file_names
!= NULL
)
2562 return this_cu
->v
.quick
->file_names
;
2563 /* If we know there is no line data, no point in looking again. */
2564 if (this_cu
->v
.quick
->no_file_data
)
2567 /* If DWO files are in use, we can still find the DW_AT_stmt_list attribute
2568 in the stub for CUs, there's is no need to lookup the DWO file.
2569 However, that's not the case for TUs where DW_AT_stmt_list lives in the
2571 if (this_cu
->is_debug_types
)
2572 init_cutu_and_read_dies (this_cu
, 0, 0, dw2_get_file_names_reader
, NULL
);
2574 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
2576 if (this_cu
->v
.quick
->no_file_data
)
2578 return this_cu
->v
.quick
->file_names
;
2581 /* A helper for the "quick" functions which computes and caches the
2582 real path for a given file name from the line table. */
2585 dw2_get_real_path (struct objfile
*objfile
,
2586 struct quick_file_names
*qfn
, int index
)
2588 if (qfn
->real_names
== NULL
)
2589 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2590 qfn
->num_file_names
, sizeof (char *));
2592 if (qfn
->real_names
[index
] == NULL
)
2593 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
2595 return qfn
->real_names
[index
];
2598 static struct symtab
*
2599 dw2_find_last_source_symtab (struct objfile
*objfile
)
2603 dw2_setup (objfile
);
2604 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2605 return dw2_instantiate_symtab (dw2_get_cu (index
));
2608 /* Traversal function for dw2_forget_cached_source_info. */
2611 dw2_free_cached_file_names (void **slot
, void *info
)
2613 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
2615 if (file_data
->real_names
)
2619 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2621 xfree ((void*) file_data
->real_names
[i
]);
2622 file_data
->real_names
[i
] = NULL
;
2630 dw2_forget_cached_source_info (struct objfile
*objfile
)
2632 dw2_setup (objfile
);
2634 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
2635 dw2_free_cached_file_names
, NULL
);
2638 /* Helper function for dw2_map_symtabs_matching_filename that expands
2639 the symtabs and calls the iterator. */
2642 dw2_map_expand_apply (struct objfile
*objfile
,
2643 struct dwarf2_per_cu_data
*per_cu
,
2645 const char *full_path
, const char *real_path
,
2646 int (*callback
) (struct symtab
*, void *),
2649 struct symtab
*last_made
= objfile
->symtabs
;
2651 /* Don't visit already-expanded CUs. */
2652 if (per_cu
->v
.quick
->symtab
)
2655 /* This may expand more than one symtab, and we want to iterate over
2657 dw2_instantiate_symtab (per_cu
);
2659 return iterate_over_some_symtabs (name
, full_path
, real_path
, callback
, data
,
2660 objfile
->symtabs
, last_made
);
2663 /* Implementation of the map_symtabs_matching_filename method. */
2666 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
2667 const char *full_path
, const char *real_path
,
2668 int (*callback
) (struct symtab
*, void *),
2672 const char *name_basename
= lbasename (name
);
2673 int name_len
= strlen (name
);
2674 int is_abs
= IS_ABSOLUTE_PATH (name
);
2676 dw2_setup (objfile
);
2678 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2679 + dwarf2_per_objfile
->n_type_units
); ++i
)
2682 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2683 struct quick_file_names
*file_data
;
2685 /* We only need to look at symtabs not already expanded. */
2686 if (per_cu
->v
.quick
->symtab
)
2689 file_data
= dw2_get_file_names (objfile
, per_cu
);
2690 if (file_data
== NULL
)
2693 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2695 const char *this_name
= file_data
->file_names
[j
];
2697 if (FILENAME_CMP (name
, this_name
) == 0
2698 || (!is_abs
&& compare_filenames_for_search (this_name
,
2701 if (dw2_map_expand_apply (objfile
, per_cu
,
2702 name
, full_path
, real_path
,
2707 /* Before we invoke realpath, which can get expensive when many
2708 files are involved, do a quick comparison of the basenames. */
2709 if (! basenames_may_differ
2710 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
2713 if (full_path
!= NULL
)
2715 const char *this_real_name
= dw2_get_real_path (objfile
,
2718 if (this_real_name
!= NULL
2719 && (FILENAME_CMP (full_path
, this_real_name
) == 0
2721 && compare_filenames_for_search (this_real_name
,
2724 if (dw2_map_expand_apply (objfile
, per_cu
,
2725 name
, full_path
, real_path
,
2731 if (real_path
!= NULL
)
2733 const char *this_real_name
= dw2_get_real_path (objfile
,
2736 if (this_real_name
!= NULL
2737 && (FILENAME_CMP (real_path
, this_real_name
) == 0
2739 && compare_filenames_for_search (this_real_name
,
2742 if (dw2_map_expand_apply (objfile
, per_cu
,
2743 name
, full_path
, real_path
,
2754 static struct symtab
*
2755 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
2756 const char *name
, domain_enum domain
)
2758 /* We do all the work in the pre_expand_symtabs_matching hook
2763 /* A helper function that expands all symtabs that hold an object
2764 named NAME. If WANT_SPECIFIC_BLOCK is non-zero, only look for
2765 symbols in block BLOCK_KIND. */
2768 dw2_do_expand_symtabs_matching (struct objfile
*objfile
,
2769 int want_specific_block
,
2770 enum block_enum block_kind
,
2771 const char *name
, domain_enum domain
)
2773 struct mapped_index
*index
;
2775 dw2_setup (objfile
);
2777 index
= dwarf2_per_objfile
->index_table
;
2779 /* index_table is NULL if OBJF_READNOW. */
2784 if (find_slot_in_mapped_hash (index
, name
, &vec
))
2786 offset_type i
, len
= MAYBE_SWAP (*vec
);
2787 for (i
= 0; i
< len
; ++i
)
2789 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[i
+ 1]);
2790 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
2791 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
2792 int want_static
= block_kind
!= GLOBAL_BLOCK
;
2793 /* This value is only valid for index versions >= 7. */
2794 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
2795 gdb_index_symbol_kind symbol_kind
=
2796 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
2798 if (want_specific_block
2799 && index
->version
>= 7
2800 && want_static
!= is_static
)
2803 /* Only check the symbol's kind if it has one.
2804 Indices prior to version 7 don't record it. */
2805 if (index
->version
>= 7)
2810 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
2811 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
2812 /* Some types are also in VAR_DOMAIN. */
2813 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
2817 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
2821 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
2829 dw2_instantiate_symtab (per_cu
);
2836 dw2_pre_expand_symtabs_matching (struct objfile
*objfile
,
2837 enum block_enum block_kind
, const char *name
,
2840 dw2_do_expand_symtabs_matching (objfile
, 1, block_kind
, name
, domain
);
2844 dw2_print_stats (struct objfile
*objfile
)
2848 dw2_setup (objfile
);
2850 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2851 + dwarf2_per_objfile
->n_type_units
); ++i
)
2853 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2855 if (!per_cu
->v
.quick
->symtab
)
2858 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
2862 dw2_dump (struct objfile
*objfile
)
2864 /* Nothing worth printing. */
2868 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
2869 struct section_offsets
*delta
)
2871 /* There's nothing to relocate here. */
2875 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
2876 const char *func_name
)
2878 /* Note: It doesn't matter what we pass for block_kind here. */
2879 dw2_do_expand_symtabs_matching (objfile
, 0, GLOBAL_BLOCK
, func_name
,
2884 dw2_expand_all_symtabs (struct objfile
*objfile
)
2888 dw2_setup (objfile
);
2890 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2891 + dwarf2_per_objfile
->n_type_units
); ++i
)
2893 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2895 dw2_instantiate_symtab (per_cu
);
2900 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
2901 const char *filename
)
2905 dw2_setup (objfile
);
2907 /* We don't need to consider type units here.
2908 This is only called for examining code, e.g. expand_line_sal.
2909 There can be an order of magnitude (or more) more type units
2910 than comp units, and we avoid them if we can. */
2912 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
2915 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2916 struct quick_file_names
*file_data
;
2918 /* We only need to look at symtabs not already expanded. */
2919 if (per_cu
->v
.quick
->symtab
)
2922 file_data
= dw2_get_file_names (objfile
, per_cu
);
2923 if (file_data
== NULL
)
2926 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2928 const char *this_name
= file_data
->file_names
[j
];
2929 if (FILENAME_CMP (this_name
, filename
) == 0)
2931 dw2_instantiate_symtab (per_cu
);
2938 /* A helper function for dw2_find_symbol_file that finds the primary
2939 file name for a given CU. This is a die_reader_func. */
2942 dw2_get_primary_filename_reader (const struct die_reader_specs
*reader
,
2944 struct die_info
*comp_unit_die
,
2948 const char **result_ptr
= data
;
2949 struct dwarf2_cu
*cu
= reader
->cu
;
2950 struct attribute
*attr
;
2952 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
2956 *result_ptr
= DW_STRING (attr
);
2960 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
2962 struct dwarf2_per_cu_data
*per_cu
;
2964 struct quick_file_names
*file_data
;
2965 const char *filename
;
2967 dw2_setup (objfile
);
2969 /* index_table is NULL if OBJF_READNOW. */
2970 if (!dwarf2_per_objfile
->index_table
)
2974 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
2976 struct blockvector
*bv
= BLOCKVECTOR (s
);
2977 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2978 struct symbol
*sym
= lookup_block_symbol (block
, name
, VAR_DOMAIN
);
2981 return sym
->symtab
->filename
;
2986 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2990 /* Note that this just looks at the very first one named NAME -- but
2991 actually we are looking for a function. find_main_filename
2992 should be rewritten so that it doesn't require a custom hook. It
2993 could just use the ordinary symbol tables. */
2994 /* vec[0] is the length, which must always be >0. */
2995 per_cu
= dw2_get_cu (GDB_INDEX_CU_VALUE (MAYBE_SWAP (vec
[1])));
2997 if (per_cu
->v
.quick
->symtab
!= NULL
)
2998 return per_cu
->v
.quick
->symtab
->filename
;
3000 init_cutu_and_read_dies (per_cu
, 0, 0, dw2_get_primary_filename_reader
,
3007 dw2_map_matching_symbols (const char * name
, domain_enum
namespace,
3008 struct objfile
*objfile
, int global
,
3009 int (*callback
) (struct block
*,
3010 struct symbol
*, void *),
3011 void *data
, symbol_compare_ftype
*match
,
3012 symbol_compare_ftype
*ordered_compare
)
3014 /* Currently unimplemented; used for Ada. The function can be called if the
3015 current language is Ada for a non-Ada objfile using GNU index. As Ada
3016 does not look for non-Ada symbols this function should just return. */
3020 dw2_expand_symtabs_matching
3021 (struct objfile
*objfile
,
3022 int (*file_matcher
) (const char *, void *),
3023 int (*name_matcher
) (const char *, void *),
3024 enum search_domain kind
,
3029 struct mapped_index
*index
;
3031 dw2_setup (objfile
);
3033 /* index_table is NULL if OBJF_READNOW. */
3034 if (!dwarf2_per_objfile
->index_table
)
3036 index
= dwarf2_per_objfile
->index_table
;
3038 if (file_matcher
!= NULL
)
3040 struct cleanup
*cleanup
;
3041 htab_t visited_found
, visited_not_found
;
3043 visited_found
= htab_create_alloc (10,
3044 htab_hash_pointer
, htab_eq_pointer
,
3045 NULL
, xcalloc
, xfree
);
3046 cleanup
= make_cleanup_htab_delete (visited_found
);
3047 visited_not_found
= htab_create_alloc (10,
3048 htab_hash_pointer
, htab_eq_pointer
,
3049 NULL
, xcalloc
, xfree
);
3050 make_cleanup_htab_delete (visited_not_found
);
3052 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3053 + dwarf2_per_objfile
->n_type_units
); ++i
)
3056 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3057 struct quick_file_names
*file_data
;
3060 per_cu
->v
.quick
->mark
= 0;
3062 /* We only need to look at symtabs not already expanded. */
3063 if (per_cu
->v
.quick
->symtab
)
3066 file_data
= dw2_get_file_names (objfile
, per_cu
);
3067 if (file_data
== NULL
)
3070 if (htab_find (visited_not_found
, file_data
) != NULL
)
3072 else if (htab_find (visited_found
, file_data
) != NULL
)
3074 per_cu
->v
.quick
->mark
= 1;
3078 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3080 if (file_matcher (file_data
->file_names
[j
], data
))
3082 per_cu
->v
.quick
->mark
= 1;
3087 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3089 : visited_not_found
,
3094 do_cleanups (cleanup
);
3097 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3099 offset_type idx
= 2 * iter
;
3101 offset_type
*vec
, vec_len
, vec_idx
;
3103 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3106 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3108 if (! (*name_matcher
) (name
, data
))
3111 /* The name was matched, now expand corresponding CUs that were
3113 vec
= (offset_type
*) (index
->constant_pool
3114 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3115 vec_len
= MAYBE_SWAP (vec
[0]);
3116 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3118 struct dwarf2_per_cu_data
*per_cu
;
3119 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3120 gdb_index_symbol_kind symbol_kind
=
3121 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3122 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3124 /* Don't crash on bad data. */
3125 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3126 + dwarf2_per_objfile
->n_type_units
))
3129 /* Only check the symbol's kind if it has one.
3130 Indices prior to version 7 don't record it. */
3131 if (index
->version
>= 7)
3135 case VARIABLES_DOMAIN
:
3136 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
3139 case FUNCTIONS_DOMAIN
:
3140 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
3144 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3152 per_cu
= dw2_get_cu (cu_index
);
3153 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
3154 dw2_instantiate_symtab (per_cu
);
3159 /* A helper for dw2_find_pc_sect_symtab which finds the most specific
3162 static struct symtab
*
3163 recursively_find_pc_sect_symtab (struct symtab
*symtab
, CORE_ADDR pc
)
3167 if (BLOCKVECTOR (symtab
) != NULL
3168 && blockvector_contains_pc (BLOCKVECTOR (symtab
), pc
))
3171 if (symtab
->includes
== NULL
)
3174 for (i
= 0; symtab
->includes
[i
]; ++i
)
3176 struct symtab
*s
= symtab
->includes
[i
];
3178 s
= recursively_find_pc_sect_symtab (s
, pc
);
3186 static struct symtab
*
3187 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
3188 struct minimal_symbol
*msymbol
,
3190 struct obj_section
*section
,
3193 struct dwarf2_per_cu_data
*data
;
3194 struct symtab
*result
;
3196 dw2_setup (objfile
);
3198 if (!objfile
->psymtabs_addrmap
)
3201 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
3205 if (warn_if_readin
&& data
->v
.quick
->symtab
)
3206 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
3207 paddress (get_objfile_arch (objfile
), pc
));
3209 result
= recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data
), pc
);
3210 gdb_assert (result
!= NULL
);
3215 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
3216 void *data
, int need_fullname
)
3219 struct cleanup
*cleanup
;
3220 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
3221 NULL
, xcalloc
, xfree
);
3223 cleanup
= make_cleanup_htab_delete (visited
);
3224 dw2_setup (objfile
);
3226 /* We can ignore file names coming from already-expanded CUs. */
3227 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3228 + dwarf2_per_objfile
->n_type_units
); ++i
)
3230 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3232 if (per_cu
->v
.quick
->symtab
)
3234 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
3237 *slot
= per_cu
->v
.quick
->file_names
;
3241 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3242 + dwarf2_per_objfile
->n_type_units
); ++i
)
3245 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3246 struct quick_file_names
*file_data
;
3249 /* We only need to look at symtabs not already expanded. */
3250 if (per_cu
->v
.quick
->symtab
)
3253 file_data
= dw2_get_file_names (objfile
, per_cu
);
3254 if (file_data
== NULL
)
3257 slot
= htab_find_slot (visited
, file_data
, INSERT
);
3260 /* Already visited. */
3265 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3267 const char *this_real_name
;
3270 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3272 this_real_name
= NULL
;
3273 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
3277 do_cleanups (cleanup
);
3281 dw2_has_symbols (struct objfile
*objfile
)
3286 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
3289 dw2_find_last_source_symtab
,
3290 dw2_forget_cached_source_info
,
3291 dw2_map_symtabs_matching_filename
,
3293 dw2_pre_expand_symtabs_matching
,
3297 dw2_expand_symtabs_for_function
,
3298 dw2_expand_all_symtabs
,
3299 dw2_expand_symtabs_with_filename
,
3300 dw2_find_symbol_file
,
3301 dw2_map_matching_symbols
,
3302 dw2_expand_symtabs_matching
,
3303 dw2_find_pc_sect_symtab
,
3304 dw2_map_symbol_filenames
3307 /* Initialize for reading DWARF for this objfile. Return 0 if this
3308 file will use psymtabs, or 1 if using the GNU index. */
3311 dwarf2_initialize_objfile (struct objfile
*objfile
)
3313 /* If we're about to read full symbols, don't bother with the
3314 indices. In this case we also don't care if some other debug
3315 format is making psymtabs, because they are all about to be
3317 if ((objfile
->flags
& OBJF_READNOW
))
3321 dwarf2_per_objfile
->using_index
= 1;
3322 create_all_comp_units (objfile
);
3323 create_all_type_units (objfile
);
3324 dwarf2_per_objfile
->quick_file_names_table
=
3325 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3327 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3328 + dwarf2_per_objfile
->n_type_units
); ++i
)
3330 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3332 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3333 struct dwarf2_per_cu_quick_data
);
3336 /* Return 1 so that gdb sees the "quick" functions. However,
3337 these functions will be no-ops because we will have expanded
3342 if (dwarf2_read_index (objfile
))
3350 /* Build a partial symbol table. */
3353 dwarf2_build_psymtabs (struct objfile
*objfile
)
3355 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
3357 init_psymbol_list (objfile
, 1024);
3360 dwarf2_build_psymtabs_hard (objfile
);
3363 /* Return the total length of the CU described by HEADER. */
3366 get_cu_length (const struct comp_unit_head
*header
)
3368 return header
->initial_length_size
+ header
->length
;
3371 /* Return TRUE if OFFSET is within CU_HEADER. */
3374 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
3376 sect_offset bottom
= { cu_header
->offset
.sect_off
};
3377 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
3379 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
3382 /* Find the base address of the compilation unit for range lists and
3383 location lists. It will normally be specified by DW_AT_low_pc.
3384 In DWARF-3 draft 4, the base address could be overridden by
3385 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3386 compilation units with discontinuous ranges. */
3389 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
3391 struct attribute
*attr
;
3394 cu
->base_address
= 0;
3396 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3399 cu
->base_address
= DW_ADDR (attr
);
3404 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3407 cu
->base_address
= DW_ADDR (attr
);
3413 /* Read in the comp unit header information from the debug_info at info_ptr.
3414 NOTE: This leaves members offset, first_die_offset to be filled in
3418 read_comp_unit_head (struct comp_unit_head
*cu_header
,
3419 gdb_byte
*info_ptr
, bfd
*abfd
)
3422 unsigned int bytes_read
;
3424 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
3425 cu_header
->initial_length_size
= bytes_read
;
3426 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
3427 info_ptr
+= bytes_read
;
3428 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
3430 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
3432 info_ptr
+= bytes_read
;
3433 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
3435 signed_addr
= bfd_get_sign_extend_vma (abfd
);
3436 if (signed_addr
< 0)
3437 internal_error (__FILE__
, __LINE__
,
3438 _("read_comp_unit_head: dwarf from non elf file"));
3439 cu_header
->signed_addr_p
= signed_addr
;
3444 /* Subroutine of read_and_check_comp_unit_head and
3445 read_and_check_type_unit_head to simplify them.
3446 Perform various error checking on the header. */
3449 error_check_comp_unit_head (struct comp_unit_head
*header
,
3450 struct dwarf2_section_info
*section
,
3451 struct dwarf2_section_info
*abbrev_section
)
3453 bfd
*abfd
= section
->asection
->owner
;
3454 const char *filename
= bfd_get_filename (abfd
);
3456 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
3457 error (_("Dwarf Error: wrong version in compilation unit header "
3458 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
3461 if (header
->abbrev_offset
.sect_off
3462 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
,
3463 &dwarf2_per_objfile
->abbrev
))
3464 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
3465 "(offset 0x%lx + 6) [in module %s]"),
3466 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
3469 /* Cast to unsigned long to use 64-bit arithmetic when possible to
3470 avoid potential 32-bit overflow. */
3471 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
3473 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
3474 "(offset 0x%lx + 0) [in module %s]"),
3475 (long) header
->length
, (long) header
->offset
.sect_off
,
3479 /* Read in a CU/TU header and perform some basic error checking.
3480 The contents of the header are stored in HEADER.
3481 The result is a pointer to the start of the first DIE. */
3484 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
3485 struct dwarf2_section_info
*section
,
3486 struct dwarf2_section_info
*abbrev_section
,
3488 int is_debug_types_section
)
3490 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3491 bfd
*abfd
= section
->asection
->owner
;
3493 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3495 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3497 /* If we're reading a type unit, skip over the signature and
3498 type_offset fields. */
3499 if (is_debug_types_section
)
3500 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
3502 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
3504 error_check_comp_unit_head (header
, section
, abbrev_section
);
3509 /* Read in the types comp unit header information from .debug_types entry at
3510 types_ptr. The result is a pointer to one past the end of the header. */
3513 read_and_check_type_unit_head (struct comp_unit_head
*header
,
3514 struct dwarf2_section_info
*section
,
3515 struct dwarf2_section_info
*abbrev_section
,
3517 ULONGEST
*signature
,
3518 cu_offset
*type_offset_in_tu
)
3520 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3521 bfd
*abfd
= section
->asection
->owner
;
3523 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3525 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3527 /* If we're reading a type unit, skip over the signature and
3528 type_offset fields. */
3529 if (signature
!= NULL
)
3530 *signature
= read_8_bytes (abfd
, info_ptr
);
3532 if (type_offset_in_tu
!= NULL
)
3533 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
3534 header
->offset_size
);
3535 info_ptr
+= header
->offset_size
;
3537 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
3539 error_check_comp_unit_head (header
, section
, abbrev_section
);
3544 /* Allocate a new partial symtab for file named NAME and mark this new
3545 partial symtab as being an include of PST. */
3548 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
3549 struct objfile
*objfile
)
3551 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
3553 subpst
->section_offsets
= pst
->section_offsets
;
3554 subpst
->textlow
= 0;
3555 subpst
->texthigh
= 0;
3557 subpst
->dependencies
= (struct partial_symtab
**)
3558 obstack_alloc (&objfile
->objfile_obstack
,
3559 sizeof (struct partial_symtab
*));
3560 subpst
->dependencies
[0] = pst
;
3561 subpst
->number_of_dependencies
= 1;
3563 subpst
->globals_offset
= 0;
3564 subpst
->n_global_syms
= 0;
3565 subpst
->statics_offset
= 0;
3566 subpst
->n_static_syms
= 0;
3567 subpst
->symtab
= NULL
;
3568 subpst
->read_symtab
= pst
->read_symtab
;
3571 /* No private part is necessary for include psymtabs. This property
3572 can be used to differentiate between such include psymtabs and
3573 the regular ones. */
3574 subpst
->read_symtab_private
= NULL
;
3577 /* Read the Line Number Program data and extract the list of files
3578 included by the source file represented by PST. Build an include
3579 partial symtab for each of these included files. */
3582 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
3583 struct die_info
*die
,
3584 struct partial_symtab
*pst
)
3586 struct line_header
*lh
= NULL
;
3587 struct attribute
*attr
;
3589 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3591 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
3593 return; /* No linetable, so no includes. */
3595 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
3596 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, 1);
3598 free_line_header (lh
);
3602 hash_signatured_type (const void *item
)
3604 const struct signatured_type
*sig_type
= item
;
3606 /* This drops the top 32 bits of the signature, but is ok for a hash. */
3607 return sig_type
->signature
;
3611 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
3613 const struct signatured_type
*lhs
= item_lhs
;
3614 const struct signatured_type
*rhs
= item_rhs
;
3616 return lhs
->signature
== rhs
->signature
;
3619 /* Allocate a hash table for signatured types. */
3622 allocate_signatured_type_table (struct objfile
*objfile
)
3624 return htab_create_alloc_ex (41,
3625 hash_signatured_type
,
3628 &objfile
->objfile_obstack
,
3629 hashtab_obstack_allocate
,
3630 dummy_obstack_deallocate
);
3633 /* A helper function to add a signatured type CU to a table. */
3636 add_signatured_type_cu_to_table (void **slot
, void *datum
)
3638 struct signatured_type
*sigt
= *slot
;
3639 struct signatured_type
***datap
= datum
;
3647 /* Create the hash table of all entries in the .debug_types section.
3648 DWO_FILE is a pointer to the DWO file for .debug_types.dwo, NULL otherwise.
3649 The result is a pointer to the hash table or NULL if there are
3653 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
3654 VEC (dwarf2_section_info_def
) *types
)
3656 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3657 htab_t types_htab
= NULL
;
3659 struct dwarf2_section_info
*section
;
3660 struct dwarf2_section_info
*abbrev_section
;
3662 if (VEC_empty (dwarf2_section_info_def
, types
))
3665 abbrev_section
= (dwo_file
!= NULL
3666 ? &dwo_file
->sections
.abbrev
3667 : &dwarf2_per_objfile
->abbrev
);
3669 if (dwarf2_read_debug
)
3670 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
3671 dwo_file
? ".dwo" : "",
3672 bfd_get_filename (abbrev_section
->asection
->owner
));
3675 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
3679 gdb_byte
*info_ptr
, *end_ptr
;
3681 dwarf2_read_section (objfile
, section
);
3682 info_ptr
= section
->buffer
;
3684 if (info_ptr
== NULL
)
3687 /* We can't set abfd until now because the section may be empty or
3688 not present, in which case section->asection will be NULL. */
3689 abfd
= section
->asection
->owner
;
3691 if (types_htab
== NULL
)
3694 types_htab
= allocate_dwo_unit_table (objfile
);
3696 types_htab
= allocate_signatured_type_table (objfile
);
3699 /* We don't use init_cutu_and_read_dies_simple, or some such, here
3700 because we don't need to read any dies: the signature is in the
3703 end_ptr
= info_ptr
+ section
->size
;
3704 while (info_ptr
< end_ptr
)
3707 cu_offset type_offset_in_tu
;
3709 struct signatured_type
*sig_type
;
3710 struct dwo_unit
*dwo_tu
;
3712 gdb_byte
*ptr
= info_ptr
;
3713 struct comp_unit_head header
;
3714 unsigned int length
;
3716 offset
.sect_off
= ptr
- section
->buffer
;
3718 /* We need to read the type's signature in order to build the hash
3719 table, but we don't need anything else just yet. */
3721 ptr
= read_and_check_type_unit_head (&header
, section
,
3722 abbrev_section
, ptr
,
3723 &signature
, &type_offset_in_tu
);
3725 length
= get_cu_length (&header
);
3727 /* Skip dummy type units. */
3728 if (ptr
>= info_ptr
+ length
3729 || peek_abbrev_code (abfd
, ptr
) == 0)
3738 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3740 dwo_tu
->dwo_file
= dwo_file
;
3741 dwo_tu
->signature
= signature
;
3742 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
3743 dwo_tu
->info_or_types_section
= section
;
3744 dwo_tu
->offset
= offset
;
3745 dwo_tu
->length
= length
;
3749 /* N.B.: type_offset is not usable if this type uses a DWO file.
3750 The real type_offset is in the DWO file. */
3752 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3753 struct signatured_type
);
3754 sig_type
->signature
= signature
;
3755 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3756 sig_type
->per_cu
.objfile
= objfile
;
3757 sig_type
->per_cu
.is_debug_types
= 1;
3758 sig_type
->per_cu
.info_or_types_section
= section
;
3759 sig_type
->per_cu
.offset
= offset
;
3760 sig_type
->per_cu
.length
= length
;
3763 slot
= htab_find_slot (types_htab
,
3764 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
3766 gdb_assert (slot
!= NULL
);
3769 sect_offset dup_offset
;
3773 const struct dwo_unit
*dup_tu
= *slot
;
3775 dup_offset
= dup_tu
->offset
;
3779 const struct signatured_type
*dup_tu
= *slot
;
3781 dup_offset
= dup_tu
->per_cu
.offset
;
3784 complaint (&symfile_complaints
,
3785 _("debug type entry at offset 0x%x is duplicate to the "
3786 "entry at offset 0x%x, signature 0x%s"),
3787 offset
.sect_off
, dup_offset
.sect_off
,
3788 phex (signature
, sizeof (signature
)));
3790 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
3792 if (dwarf2_read_debug
)
3793 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
3795 phex (signature
, sizeof (signature
)));
3804 /* Create the hash table of all entries in the .debug_types section,
3805 and initialize all_type_units.
3806 The result is zero if there is an error (e.g. missing .debug_types section),
3807 otherwise non-zero. */
3810 create_all_type_units (struct objfile
*objfile
)
3813 struct signatured_type
**iter
;
3815 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
3816 if (types_htab
== NULL
)
3818 dwarf2_per_objfile
->signatured_types
= NULL
;
3822 dwarf2_per_objfile
->signatured_types
= types_htab
;
3824 dwarf2_per_objfile
->n_type_units
= htab_elements (types_htab
);
3825 dwarf2_per_objfile
->all_type_units
3826 = obstack_alloc (&objfile
->objfile_obstack
,
3827 dwarf2_per_objfile
->n_type_units
3828 * sizeof (struct signatured_type
*));
3829 iter
= &dwarf2_per_objfile
->all_type_units
[0];
3830 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
3831 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
3832 == dwarf2_per_objfile
->n_type_units
);
3837 /* Lookup a signature based type for DW_FORM_ref_sig8.
3838 Returns NULL if signature SIG is not present in the table. */
3840 static struct signatured_type
*
3841 lookup_signatured_type (ULONGEST sig
)
3843 struct signatured_type find_entry
, *entry
;
3845 if (dwarf2_per_objfile
->signatured_types
== NULL
)
3847 complaint (&symfile_complaints
,
3848 _("missing `.debug_types' section for DW_FORM_ref_sig8 die"));
3852 find_entry
.signature
= sig
;
3853 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
3857 /* Low level DIE reading support. */
3859 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
3862 init_cu_die_reader (struct die_reader_specs
*reader
,
3863 struct dwarf2_cu
*cu
,
3864 struct dwarf2_section_info
*section
,
3865 struct dwo_file
*dwo_file
)
3867 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
3868 reader
->abfd
= section
->asection
->owner
;
3870 reader
->dwo_file
= dwo_file
;
3871 reader
->die_section
= section
;
3872 reader
->buffer
= section
->buffer
;
3873 reader
->buffer_end
= section
->buffer
+ section
->size
;
3876 /* Initialize a CU (or TU) and read its DIEs.
3877 If the CU defers to a DWO file, read the DWO file as well.
3879 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
3880 Otherwise, a new CU is allocated with xmalloc.
3882 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
3883 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
3885 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
3886 linker) then DIE_READER_FUNC will not get called. */
3889 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
3890 int use_existing_cu
, int keep
,
3891 die_reader_func_ftype
*die_reader_func
,
3894 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3895 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
3896 bfd
*abfd
= section
->asection
->owner
;
3897 struct dwarf2_cu
*cu
;
3898 gdb_byte
*begin_info_ptr
, *info_ptr
;
3899 struct die_reader_specs reader
;
3900 struct die_info
*comp_unit_die
;
3902 struct attribute
*attr
;
3903 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
3904 struct signatured_type
*sig_type
= NULL
;
3905 struct dwarf2_section_info
*abbrev_section
;
3906 /* Non-zero if CU currently points to a DWO file and we need to
3907 reread it. When this happens we need to reread the skeleton die
3908 before we can reread the DWO file. */
3909 int rereading_dwo_cu
= 0;
3911 if (dwarf2_die_debug
)
3912 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
3913 this_cu
->is_debug_types
? "type" : "comp",
3914 this_cu
->offset
.sect_off
);
3916 if (use_existing_cu
)
3919 cleanups
= make_cleanup (null_cleanup
, NULL
);
3921 /* This is cheap if the section is already read in. */
3922 dwarf2_read_section (objfile
, section
);
3924 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
3925 abbrev_section
= &dwarf2_per_objfile
->abbrev
;
3927 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
3931 /* If this CU is from a DWO file we need to start over, we need to
3932 refetch the attributes from the skeleton CU.
3933 This could be optimized by retrieving those attributes from when we
3934 were here the first time: the previous comp_unit_die was stored in
3935 comp_unit_obstack. But there's no data yet that we need this
3937 if (cu
->dwo_unit
!= NULL
)
3938 rereading_dwo_cu
= 1;
3942 /* If !use_existing_cu, this_cu->cu must be NULL. */
3943 gdb_assert (this_cu
->cu
== NULL
);
3945 cu
= xmalloc (sizeof (*cu
));
3946 init_one_comp_unit (cu
, this_cu
);
3948 /* If an error occurs while loading, release our storage. */
3949 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
3952 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
3954 /* We already have the header, there's no need to read it in again. */
3955 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
3959 if (this_cu
->is_debug_types
)
3962 cu_offset type_offset_in_tu
;
3964 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
3965 abbrev_section
, info_ptr
,
3967 &type_offset_in_tu
);
3969 /* Since per_cu is the first member of struct signatured_type,
3970 we can go from a pointer to one to a pointer to the other. */
3971 sig_type
= (struct signatured_type
*) this_cu
;
3972 gdb_assert (sig_type
->signature
== signature
);
3973 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
3974 == type_offset_in_tu
.cu_off
);
3975 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
3977 /* LENGTH has not been set yet for type units if we're
3978 using .gdb_index. */
3979 this_cu
->length
= get_cu_length (&cu
->header
);
3981 /* Establish the type offset that can be used to lookup the type. */
3982 sig_type
->type_offset_in_section
.sect_off
=
3983 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
3987 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
3991 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
3992 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
3996 /* Skip dummy compilation units. */
3997 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
3998 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4000 do_cleanups (cleanups
);
4004 /* If we don't have them yet, read the abbrevs for this compilation unit.
4005 And if we need to read them now, make sure they're freed when we're
4006 done. Note that it's important that if the CU had an abbrev table
4007 on entry we don't free it when we're done: Somewhere up the call stack
4008 it may be in use. */
4009 if (cu
->abbrev_table
== NULL
)
4011 dwarf2_read_abbrevs (cu
, abbrev_section
);
4012 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4014 else if (rereading_dwo_cu
)
4016 dwarf2_free_abbrev_table (cu
);
4017 dwarf2_read_abbrevs (cu
, abbrev_section
);
4020 /* Read the top level CU/TU die. */
4021 init_cu_die_reader (&reader
, cu
, section
, NULL
);
4022 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4024 /* If we have a DWO stub, process it and then read in the DWO file.
4025 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains
4026 a DWO CU, that this test will fail. */
4027 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
4030 char *dwo_name
= DW_STRING (attr
);
4031 const char *comp_dir_string
;
4032 struct dwo_unit
*dwo_unit
;
4033 ULONGEST signature
; /* Or dwo_id. */
4034 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
4035 int i
,num_extra_attrs
;
4036 struct dwarf2_section_info
*dwo_abbrev_section
;
4039 error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name"
4040 " has children (offset 0x%x) [in module %s]"),
4041 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
4043 /* These attributes aren't processed until later:
4044 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
4045 However, the attribute is found in the stub which we won't have later.
4046 In order to not impose this complication on the rest of the code,
4047 we read them here and copy them to the DWO CU/TU die. */
4049 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
4052 if (! this_cu
->is_debug_types
)
4053 stmt_list
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
4054 low_pc
= dwarf2_attr (comp_unit_die
, DW_AT_low_pc
, cu
);
4055 high_pc
= dwarf2_attr (comp_unit_die
, DW_AT_high_pc
, cu
);
4056 ranges
= dwarf2_attr (comp_unit_die
, DW_AT_ranges
, cu
);
4057 comp_dir
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4059 /* There should be a DW_AT_addr_base attribute here (if needed).
4060 We need the value before we can process DW_FORM_GNU_addr_index. */
4062 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
4064 cu
->addr_base
= DW_UNSND (attr
);
4066 /* There should be a DW_AT_ranges_base attribute here (if needed).
4067 We need the value before we can process DW_AT_ranges. */
4068 cu
->ranges_base
= 0;
4069 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
4071 cu
->ranges_base
= DW_UNSND (attr
);
4073 if (this_cu
->is_debug_types
)
4075 gdb_assert (sig_type
!= NULL
);
4076 signature
= sig_type
->signature
;
4080 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
4082 error (_("Dwarf Error: missing dwo_id [in module %s]"),
4084 signature
= DW_UNSND (attr
);
4087 /* We may need the comp_dir in order to find the DWO file. */
4088 comp_dir_string
= NULL
;
4090 comp_dir_string
= DW_STRING (comp_dir
);
4092 if (this_cu
->is_debug_types
)
4093 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir_string
);
4095 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir_string
,
4098 if (dwo_unit
== NULL
)
4100 error (_("Dwarf Error: CU at offset 0x%x references unknown DWO"
4101 " with ID %s [in module %s]"),
4102 this_cu
->offset
.sect_off
,
4103 phex (signature
, sizeof (signature
)),
4107 /* Set up for reading the DWO CU/TU. */
4108 cu
->dwo_unit
= dwo_unit
;
4109 section
= dwo_unit
->info_or_types_section
;
4110 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
4111 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
4112 init_cu_die_reader (&reader
, cu
, section
, dwo_unit
->dwo_file
);
4114 if (this_cu
->is_debug_types
)
4118 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4122 gdb_assert (sig_type
->signature
== signature
);
4123 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4124 gdb_assert (dwo_unit
->length
== get_cu_length (&cu
->header
));
4126 /* Establish the type offset that can be used to lookup the type.
4127 For DWO files, we don't know it until now. */
4128 sig_type
->type_offset_in_section
.sect_off
=
4129 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
4133 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4136 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4137 gdb_assert (dwo_unit
->length
== get_cu_length (&cu
->header
));
4140 /* Discard the original CU's abbrev table, and read the DWO's. */
4141 dwarf2_free_abbrev_table (cu
);
4142 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4144 /* Read in the die, but leave space to copy over the attributes
4145 from the stub. This has the benefit of simplifying the rest of
4146 the code - all the real work is done here. */
4147 num_extra_attrs
= ((stmt_list
!= NULL
)
4151 + (comp_dir
!= NULL
));
4152 info_ptr
= read_full_die_1 (&reader
, &comp_unit_die
, info_ptr
,
4153 &has_children
, num_extra_attrs
);
4155 /* Copy over the attributes from the stub to the DWO die. */
4156 i
= comp_unit_die
->num_attrs
;
4157 if (stmt_list
!= NULL
)
4158 comp_unit_die
->attrs
[i
++] = *stmt_list
;
4160 comp_unit_die
->attrs
[i
++] = *low_pc
;
4161 if (high_pc
!= NULL
)
4162 comp_unit_die
->attrs
[i
++] = *high_pc
;
4164 comp_unit_die
->attrs
[i
++] = *ranges
;
4165 if (comp_dir
!= NULL
)
4166 comp_unit_die
->attrs
[i
++] = *comp_dir
;
4167 comp_unit_die
->num_attrs
+= num_extra_attrs
;
4169 /* Skip dummy compilation units. */
4170 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
4171 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4173 do_cleanups (cleanups
);
4178 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4180 if (free_cu_cleanup
!= NULL
)
4184 /* We've successfully allocated this compilation unit. Let our
4185 caller clean it up when finished with it. */
4186 discard_cleanups (free_cu_cleanup
);
4188 /* We can only discard free_cu_cleanup and all subsequent cleanups.
4189 So we have to manually free the abbrev table. */
4190 dwarf2_free_abbrev_table (cu
);
4192 /* Link this CU into read_in_chain. */
4193 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4194 dwarf2_per_objfile
->read_in_chain
= this_cu
;
4197 do_cleanups (free_cu_cleanup
);
4200 do_cleanups (cleanups
);
4203 /* Read CU/TU THIS_CU in section SECTION,
4204 but do not follow DW_AT_GNU_dwo_name if present.
4205 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed to
4206 have already done the lookup to find the DWO file).
4208 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
4209 THIS_CU->is_debug_types, but nothing else.
4211 We fill in THIS_CU->length.
4213 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4214 linker) then DIE_READER_FUNC will not get called.
4216 THIS_CU->cu is always freed when done.
4217 This is done in order to not leave THIS_CU->cu in a state where we have
4218 to care whether it refers to the "main" CU or the DWO CU. */
4221 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
4222 struct dwarf2_section_info
*abbrev_section
,
4223 struct dwo_file
*dwo_file
,
4224 die_reader_func_ftype
*die_reader_func
,
4227 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4228 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4229 bfd
*abfd
= section
->asection
->owner
;
4230 struct dwarf2_cu cu
;
4231 gdb_byte
*begin_info_ptr
, *info_ptr
;
4232 struct die_reader_specs reader
;
4233 struct cleanup
*cleanups
;
4234 struct die_info
*comp_unit_die
;
4237 if (dwarf2_die_debug
)
4238 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4239 this_cu
->is_debug_types
? "type" : "comp",
4240 this_cu
->offset
.sect_off
);
4242 gdb_assert (this_cu
->cu
== NULL
);
4244 /* This is cheap if the section is already read in. */
4245 dwarf2_read_section (objfile
, section
);
4247 init_one_comp_unit (&cu
, this_cu
);
4249 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
4251 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4252 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
4253 abbrev_section
, info_ptr
,
4254 this_cu
->is_debug_types
);
4256 this_cu
->length
= get_cu_length (&cu
.header
);
4258 /* Skip dummy compilation units. */
4259 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4260 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4262 do_cleanups (cleanups
);
4266 dwarf2_read_abbrevs (&cu
, abbrev_section
);
4267 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
4269 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
4270 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4272 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4274 do_cleanups (cleanups
);
4277 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
4278 does not lookup the specified DWO file.
4279 This cannot be used to read DWO files.
4281 THIS_CU->cu is always freed when done.
4282 This is done in order to not leave THIS_CU->cu in a state where we have
4283 to care whether it refers to the "main" CU or the DWO CU.
4284 We can revisit this if the data shows there's a performance issue. */
4287 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
4288 die_reader_func_ftype
*die_reader_func
,
4291 init_cutu_and_read_dies_no_follow (this_cu
,
4292 &dwarf2_per_objfile
->abbrev
,
4294 die_reader_func
, data
);
4297 /* die_reader_func for process_psymtab_comp_unit. */
4300 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
4302 struct die_info
*comp_unit_die
,
4306 struct dwarf2_cu
*cu
= reader
->cu
;
4307 struct objfile
*objfile
= cu
->objfile
;
4308 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
4309 struct attribute
*attr
;
4311 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
4312 struct partial_symtab
*pst
;
4314 const char *filename
;
4315 int *want_partial_unit_ptr
= data
;
4317 if (comp_unit_die
->tag
== DW_TAG_partial_unit
4318 && (want_partial_unit_ptr
== NULL
4319 || !*want_partial_unit_ptr
))
4322 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
4324 cu
->list_in_scope
= &file_symbols
;
4326 /* Allocate a new partial symbol table structure. */
4327 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
4328 if (attr
== NULL
|| !DW_STRING (attr
))
4331 filename
= DW_STRING (attr
);
4332 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
4334 /* TEXTLOW and TEXTHIGH are set below. */
4336 objfile
->global_psymbols
.next
,
4337 objfile
->static_psymbols
.next
);
4338 pst
->psymtabs_addrmap_supported
= 1;
4340 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4342 pst
->dirname
= DW_STRING (attr
);
4344 pst
->read_symtab_private
= per_cu
;
4346 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4348 /* Store the function that reads in the rest of the symbol table. */
4349 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
4351 per_cu
->v
.psymtab
= pst
;
4353 dwarf2_find_base_address (comp_unit_die
, cu
);
4355 /* Possibly set the default values of LOWPC and HIGHPC from
4357 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
4358 &best_highpc
, cu
, pst
);
4359 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
4360 /* Store the contiguous range if it is not empty; it can be empty for
4361 CUs with no code. */
4362 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4363 best_lowpc
+ baseaddr
,
4364 best_highpc
+ baseaddr
- 1, pst
);
4366 /* Check if comp unit has_children.
4367 If so, read the rest of the partial symbols from this comp unit.
4368 If not, there's no more debug_info for this comp unit. */
4371 struct partial_die_info
*first_die
;
4372 CORE_ADDR lowpc
, highpc
;
4374 lowpc
= ((CORE_ADDR
) -1);
4375 highpc
= ((CORE_ADDR
) 0);
4377 first_die
= load_partial_dies (reader
, info_ptr
, 1);
4379 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
4382 /* If we didn't find a lowpc, set it to highpc to avoid
4383 complaints from `maint check'. */
4384 if (lowpc
== ((CORE_ADDR
) -1))
4387 /* If the compilation unit didn't have an explicit address range,
4388 then use the information extracted from its child dies. */
4392 best_highpc
= highpc
;
4395 pst
->textlow
= best_lowpc
+ baseaddr
;
4396 pst
->texthigh
= best_highpc
+ baseaddr
;
4398 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
4399 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
4400 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
4401 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
4402 sort_pst_symbols (pst
);
4404 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
4407 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
4408 struct dwarf2_per_cu_data
*iter
;
4410 /* Fill in 'dependencies' here; we fill in 'users' in a
4412 pst
->number_of_dependencies
= len
;
4413 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
4414 len
* sizeof (struct symtab
*));
4416 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
4419 pst
->dependencies
[i
] = iter
->v
.psymtab
;
4421 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
4424 if (per_cu
->is_debug_types
)
4426 /* It's not clear we want to do anything with stmt lists here.
4427 Waiting to see what gcc ultimately does. */
4431 /* Get the list of files included in the current compilation unit,
4432 and build a psymtab for each of them. */
4433 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
4436 if (dwarf2_read_debug
)
4438 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4440 fprintf_unfiltered (gdb_stdlog
,
4441 "Psymtab for %s unit @0x%x: 0x%s - 0x%s"
4442 ", %d global, %d static syms\n",
4443 per_cu
->is_debug_types
? "type" : "comp",
4444 per_cu
->offset
.sect_off
,
4445 paddress (gdbarch
, pst
->textlow
),
4446 paddress (gdbarch
, pst
->texthigh
),
4447 pst
->n_global_syms
, pst
->n_static_syms
);
4451 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
4452 Process compilation unit THIS_CU for a psymtab. */
4455 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
4456 int want_partial_unit
)
4458 /* If this compilation unit was already read in, free the
4459 cached copy in order to read it in again. This is
4460 necessary because we skipped some symbols when we first
4461 read in the compilation unit (see load_partial_dies).
4462 This problem could be avoided, but the benefit is unclear. */
4463 if (this_cu
->cu
!= NULL
)
4464 free_one_cached_comp_unit (this_cu
);
4466 gdb_assert (! this_cu
->is_debug_types
);
4467 init_cutu_and_read_dies (this_cu
, 0, 0, process_psymtab_comp_unit_reader
,
4468 &want_partial_unit
);
4470 /* Age out any secondary CUs. */
4471 age_cached_comp_units ();
4474 /* Traversal function for htab_traverse_noresize.
4475 Process one .debug_types comp-unit. */
4478 process_psymtab_type_unit (void **slot
, void *info
)
4480 struct signatured_type
*sig_type
= (struct signatured_type
*) *slot
;
4481 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
4483 gdb_assert (per_cu
->is_debug_types
);
4484 gdb_assert (info
== NULL
);
4486 /* If this compilation unit was already read in, free the
4487 cached copy in order to read it in again. This is
4488 necessary because we skipped some symbols when we first
4489 read in the compilation unit (see load_partial_dies).
4490 This problem could be avoided, but the benefit is unclear. */
4491 if (per_cu
->cu
!= NULL
)
4492 free_one_cached_comp_unit (per_cu
);
4494 init_cutu_and_read_dies (per_cu
, 0, 0, process_psymtab_comp_unit_reader
,
4497 /* Age out any secondary CUs. */
4498 age_cached_comp_units ();
4503 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
4504 Build partial symbol tables for the .debug_types comp-units. */
4507 build_type_psymtabs (struct objfile
*objfile
)
4509 if (! create_all_type_units (objfile
))
4512 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
4513 process_psymtab_type_unit
, NULL
);
4516 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
4519 psymtabs_addrmap_cleanup (void *o
)
4521 struct objfile
*objfile
= o
;
4523 objfile
->psymtabs_addrmap
= NULL
;
4526 /* Compute the 'user' field for each psymtab in OBJFILE. */
4529 set_partial_user (struct objfile
*objfile
)
4533 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4535 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4536 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
4539 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
4541 /* Set the 'user' field only if it is not already set. */
4542 if (pst
->dependencies
[j
]->user
== NULL
)
4543 pst
->dependencies
[j
]->user
= pst
;
4548 /* Build the partial symbol table by doing a quick pass through the
4549 .debug_info and .debug_abbrev sections. */
4552 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
4554 struct cleanup
*back_to
, *addrmap_cleanup
;
4555 struct obstack temp_obstack
;
4558 if (dwarf2_read_debug
)
4560 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
4564 dwarf2_per_objfile
->reading_partial_symbols
= 1;
4566 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
4568 /* Any cached compilation units will be linked by the per-objfile
4569 read_in_chain. Make sure to free them when we're done. */
4570 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
4572 build_type_psymtabs (objfile
);
4574 create_all_comp_units (objfile
);
4576 /* Create a temporary address map on a temporary obstack. We later
4577 copy this to the final obstack. */
4578 obstack_init (&temp_obstack
);
4579 make_cleanup_obstack_free (&temp_obstack
);
4580 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
4581 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
4583 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4585 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4587 process_psymtab_comp_unit (per_cu
, 0);
4590 set_partial_user (objfile
);
4592 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
4593 &objfile
->objfile_obstack
);
4594 discard_cleanups (addrmap_cleanup
);
4596 do_cleanups (back_to
);
4598 if (dwarf2_read_debug
)
4599 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
4603 /* die_reader_func for load_partial_comp_unit. */
4606 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
4608 struct die_info
*comp_unit_die
,
4612 struct dwarf2_cu
*cu
= reader
->cu
;
4614 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
4616 /* Check if comp unit has_children.
4617 If so, read the rest of the partial symbols from this comp unit.
4618 If not, there's no more debug_info for this comp unit. */
4620 load_partial_dies (reader
, info_ptr
, 0);
4623 /* Load the partial DIEs for a secondary CU into memory.
4624 This is also used when rereading a primary CU with load_all_dies. */
4627 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
4629 init_cutu_and_read_dies (this_cu
, 1, 1, load_partial_comp_unit_reader
, NULL
);
4632 /* Create a list of all compilation units in OBJFILE.
4633 This is only done for -readnow and building partial symtabs. */
4636 create_all_comp_units (struct objfile
*objfile
)
4640 struct dwarf2_per_cu_data
**all_comp_units
;
4643 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
4644 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
4648 all_comp_units
= xmalloc (n_allocated
4649 * sizeof (struct dwarf2_per_cu_data
*));
4651 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
4652 + dwarf2_per_objfile
->info
.size
)
4654 unsigned int length
, initial_length_size
;
4655 struct dwarf2_per_cu_data
*this_cu
;
4658 offset
.sect_off
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
4660 /* Read just enough information to find out where the next
4661 compilation unit is. */
4662 length
= read_initial_length (objfile
->obfd
, info_ptr
,
4663 &initial_length_size
);
4665 /* Save the compilation unit for later lookup. */
4666 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
4667 sizeof (struct dwarf2_per_cu_data
));
4668 memset (this_cu
, 0, sizeof (*this_cu
));
4669 this_cu
->offset
= offset
;
4670 this_cu
->length
= length
+ initial_length_size
;
4671 this_cu
->objfile
= objfile
;
4672 this_cu
->info_or_types_section
= &dwarf2_per_objfile
->info
;
4674 if (n_comp_units
== n_allocated
)
4677 all_comp_units
= xrealloc (all_comp_units
,
4679 * sizeof (struct dwarf2_per_cu_data
*));
4681 all_comp_units
[n_comp_units
++] = this_cu
;
4683 info_ptr
= info_ptr
+ this_cu
->length
;
4686 dwarf2_per_objfile
->all_comp_units
4687 = obstack_alloc (&objfile
->objfile_obstack
,
4688 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
4689 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
4690 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
4691 xfree (all_comp_units
);
4692 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
4695 /* Process all loaded DIEs for compilation unit CU, starting at
4696 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
4697 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
4698 DW_AT_ranges). If NEED_PC is set, then this function will set
4699 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
4700 and record the covered ranges in the addrmap. */
4703 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
4704 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
4706 struct partial_die_info
*pdi
;
4708 /* Now, march along the PDI's, descending into ones which have
4709 interesting children but skipping the children of the other ones,
4710 until we reach the end of the compilation unit. */
4716 fixup_partial_die (pdi
, cu
);
4718 /* Anonymous namespaces or modules have no name but have interesting
4719 children, so we need to look at them. Ditto for anonymous
4722 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
4723 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
4724 || pdi
->tag
== DW_TAG_imported_unit
)
4728 case DW_TAG_subprogram
:
4729 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
4731 case DW_TAG_constant
:
4732 case DW_TAG_variable
:
4733 case DW_TAG_typedef
:
4734 case DW_TAG_union_type
:
4735 if (!pdi
->is_declaration
)
4737 add_partial_symbol (pdi
, cu
);
4740 case DW_TAG_class_type
:
4741 case DW_TAG_interface_type
:
4742 case DW_TAG_structure_type
:
4743 if (!pdi
->is_declaration
)
4745 add_partial_symbol (pdi
, cu
);
4748 case DW_TAG_enumeration_type
:
4749 if (!pdi
->is_declaration
)
4750 add_partial_enumeration (pdi
, cu
);
4752 case DW_TAG_base_type
:
4753 case DW_TAG_subrange_type
:
4754 /* File scope base type definitions are added to the partial
4756 add_partial_symbol (pdi
, cu
);
4758 case DW_TAG_namespace
:
4759 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
4762 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
4764 case DW_TAG_imported_unit
:
4766 struct dwarf2_per_cu_data
*per_cu
;
4768 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
4771 /* Go read the partial unit, if needed. */
4772 if (per_cu
->v
.psymtab
== NULL
)
4773 process_psymtab_comp_unit (per_cu
, 1);
4775 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
4784 /* If the die has a sibling, skip to the sibling. */
4786 pdi
= pdi
->die_sibling
;
4790 /* Functions used to compute the fully scoped name of a partial DIE.
4792 Normally, this is simple. For C++, the parent DIE's fully scoped
4793 name is concatenated with "::" and the partial DIE's name. For
4794 Java, the same thing occurs except that "." is used instead of "::".
4795 Enumerators are an exception; they use the scope of their parent
4796 enumeration type, i.e. the name of the enumeration type is not
4797 prepended to the enumerator.
4799 There are two complexities. One is DW_AT_specification; in this
4800 case "parent" means the parent of the target of the specification,
4801 instead of the direct parent of the DIE. The other is compilers
4802 which do not emit DW_TAG_namespace; in this case we try to guess
4803 the fully qualified name of structure types from their members'
4804 linkage names. This must be done using the DIE's children rather
4805 than the children of any DW_AT_specification target. We only need
4806 to do this for structures at the top level, i.e. if the target of
4807 any DW_AT_specification (if any; otherwise the DIE itself) does not
4810 /* Compute the scope prefix associated with PDI's parent, in
4811 compilation unit CU. The result will be allocated on CU's
4812 comp_unit_obstack, or a copy of the already allocated PDI->NAME
4813 field. NULL is returned if no prefix is necessary. */
4815 partial_die_parent_scope (struct partial_die_info
*pdi
,
4816 struct dwarf2_cu
*cu
)
4818 char *grandparent_scope
;
4819 struct partial_die_info
*parent
, *real_pdi
;
4821 /* We need to look at our parent DIE; if we have a DW_AT_specification,
4822 then this means the parent of the specification DIE. */
4825 while (real_pdi
->has_specification
)
4826 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
4828 parent
= real_pdi
->die_parent
;
4832 if (parent
->scope_set
)
4833 return parent
->scope
;
4835 fixup_partial_die (parent
, cu
);
4837 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
4839 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
4840 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
4841 Work around this problem here. */
4842 if (cu
->language
== language_cplus
4843 && parent
->tag
== DW_TAG_namespace
4844 && strcmp (parent
->name
, "::") == 0
4845 && grandparent_scope
== NULL
)
4847 parent
->scope
= NULL
;
4848 parent
->scope_set
= 1;
4852 if (pdi
->tag
== DW_TAG_enumerator
)
4853 /* Enumerators should not get the name of the enumeration as a prefix. */
4854 parent
->scope
= grandparent_scope
;
4855 else if (parent
->tag
== DW_TAG_namespace
4856 || parent
->tag
== DW_TAG_module
4857 || parent
->tag
== DW_TAG_structure_type
4858 || parent
->tag
== DW_TAG_class_type
4859 || parent
->tag
== DW_TAG_interface_type
4860 || parent
->tag
== DW_TAG_union_type
4861 || parent
->tag
== DW_TAG_enumeration_type
)
4863 if (grandparent_scope
== NULL
)
4864 parent
->scope
= parent
->name
;
4866 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
4868 parent
->name
, 0, cu
);
4872 /* FIXME drow/2004-04-01: What should we be doing with
4873 function-local names? For partial symbols, we should probably be
4875 complaint (&symfile_complaints
,
4876 _("unhandled containing DIE tag %d for DIE at %d"),
4877 parent
->tag
, pdi
->offset
.sect_off
);
4878 parent
->scope
= grandparent_scope
;
4881 parent
->scope_set
= 1;
4882 return parent
->scope
;
4885 /* Return the fully scoped name associated with PDI, from compilation unit
4886 CU. The result will be allocated with malloc. */
4889 partial_die_full_name (struct partial_die_info
*pdi
,
4890 struct dwarf2_cu
*cu
)
4894 /* If this is a template instantiation, we can not work out the
4895 template arguments from partial DIEs. So, unfortunately, we have
4896 to go through the full DIEs. At least any work we do building
4897 types here will be reused if full symbols are loaded later. */
4898 if (pdi
->has_template_arguments
)
4900 fixup_partial_die (pdi
, cu
);
4902 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
4904 struct die_info
*die
;
4905 struct attribute attr
;
4906 struct dwarf2_cu
*ref_cu
= cu
;
4908 /* DW_FORM_ref_addr is using section offset. */
4910 attr
.form
= DW_FORM_ref_addr
;
4911 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
4912 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
4914 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
4918 parent_scope
= partial_die_parent_scope (pdi
, cu
);
4919 if (parent_scope
== NULL
)
4922 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
4926 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
4928 struct objfile
*objfile
= cu
->objfile
;
4930 char *actual_name
= NULL
;
4932 int built_actual_name
= 0;
4934 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4936 actual_name
= partial_die_full_name (pdi
, cu
);
4938 built_actual_name
= 1;
4940 if (actual_name
== NULL
)
4941 actual_name
= pdi
->name
;
4945 case DW_TAG_subprogram
:
4946 if (pdi
->is_external
|| cu
->language
== language_ada
)
4948 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
4949 of the global scope. But in Ada, we want to be able to access
4950 nested procedures globally. So all Ada subprograms are stored
4951 in the global scope. */
4952 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
4953 mst_text, objfile); */
4954 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4956 VAR_DOMAIN
, LOC_BLOCK
,
4957 &objfile
->global_psymbols
,
4958 0, pdi
->lowpc
+ baseaddr
,
4959 cu
->language
, objfile
);
4963 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
4964 mst_file_text, objfile); */
4965 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4967 VAR_DOMAIN
, LOC_BLOCK
,
4968 &objfile
->static_psymbols
,
4969 0, pdi
->lowpc
+ baseaddr
,
4970 cu
->language
, objfile
);
4973 case DW_TAG_constant
:
4975 struct psymbol_allocation_list
*list
;
4977 if (pdi
->is_external
)
4978 list
= &objfile
->global_psymbols
;
4980 list
= &objfile
->static_psymbols
;
4981 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4982 built_actual_name
, VAR_DOMAIN
, LOC_STATIC
,
4983 list
, 0, 0, cu
->language
, objfile
);
4986 case DW_TAG_variable
:
4988 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
4992 && !dwarf2_per_objfile
->has_section_at_zero
)
4994 /* A global or static variable may also have been stripped
4995 out by the linker if unused, in which case its address
4996 will be nullified; do not add such variables into partial
4997 symbol table then. */
4999 else if (pdi
->is_external
)
5002 Don't enter into the minimal symbol tables as there is
5003 a minimal symbol table entry from the ELF symbols already.
5004 Enter into partial symbol table if it has a location
5005 descriptor or a type.
5006 If the location descriptor is missing, new_symbol will create
5007 a LOC_UNRESOLVED symbol, the address of the variable will then
5008 be determined from the minimal symbol table whenever the variable
5010 The address for the partial symbol table entry is not
5011 used by GDB, but it comes in handy for debugging partial symbol
5014 if (pdi
->d
.locdesc
|| pdi
->has_type
)
5015 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5017 VAR_DOMAIN
, LOC_STATIC
,
5018 &objfile
->global_psymbols
,
5020 cu
->language
, objfile
);
5024 /* Static Variable. Skip symbols without location descriptors. */
5025 if (pdi
->d
.locdesc
== NULL
)
5027 if (built_actual_name
)
5028 xfree (actual_name
);
5031 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
5032 mst_file_data, objfile); */
5033 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5035 VAR_DOMAIN
, LOC_STATIC
,
5036 &objfile
->static_psymbols
,
5038 cu
->language
, objfile
);
5041 case DW_TAG_typedef
:
5042 case DW_TAG_base_type
:
5043 case DW_TAG_subrange_type
:
5044 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5046 VAR_DOMAIN
, LOC_TYPEDEF
,
5047 &objfile
->static_psymbols
,
5048 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5050 case DW_TAG_namespace
:
5051 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5053 VAR_DOMAIN
, LOC_TYPEDEF
,
5054 &objfile
->global_psymbols
,
5055 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5057 case DW_TAG_class_type
:
5058 case DW_TAG_interface_type
:
5059 case DW_TAG_structure_type
:
5060 case DW_TAG_union_type
:
5061 case DW_TAG_enumeration_type
:
5062 /* Skip external references. The DWARF standard says in the section
5063 about "Structure, Union, and Class Type Entries": "An incomplete
5064 structure, union or class type is represented by a structure,
5065 union or class entry that does not have a byte size attribute
5066 and that has a DW_AT_declaration attribute." */
5067 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
5069 if (built_actual_name
)
5070 xfree (actual_name
);
5074 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
5075 static vs. global. */
5076 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5078 STRUCT_DOMAIN
, LOC_TYPEDEF
,
5079 (cu
->language
== language_cplus
5080 || cu
->language
== language_java
)
5081 ? &objfile
->global_psymbols
5082 : &objfile
->static_psymbols
,
5083 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5086 case DW_TAG_enumerator
:
5087 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5089 VAR_DOMAIN
, LOC_CONST
,
5090 (cu
->language
== language_cplus
5091 || cu
->language
== language_java
)
5092 ? &objfile
->global_psymbols
5093 : &objfile
->static_psymbols
,
5094 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5100 if (built_actual_name
)
5101 xfree (actual_name
);
5104 /* Read a partial die corresponding to a namespace; also, add a symbol
5105 corresponding to that namespace to the symbol table. NAMESPACE is
5106 the name of the enclosing namespace. */
5109 add_partial_namespace (struct partial_die_info
*pdi
,
5110 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5111 int need_pc
, struct dwarf2_cu
*cu
)
5113 /* Add a symbol for the namespace. */
5115 add_partial_symbol (pdi
, cu
);
5117 /* Now scan partial symbols in that namespace. */
5119 if (pdi
->has_children
)
5120 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
5123 /* Read a partial die corresponding to a Fortran module. */
5126 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
5127 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
5129 /* Now scan partial symbols in that module. */
5131 if (pdi
->has_children
)
5132 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
5135 /* Read a partial die corresponding to a subprogram and create a partial
5136 symbol for that subprogram. When the CU language allows it, this
5137 routine also defines a partial symbol for each nested subprogram
5138 that this subprogram contains.
5140 DIE my also be a lexical block, in which case we simply search
5141 recursively for suprograms defined inside that lexical block.
5142 Again, this is only performed when the CU language allows this
5143 type of definitions. */
5146 add_partial_subprogram (struct partial_die_info
*pdi
,
5147 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5148 int need_pc
, struct dwarf2_cu
*cu
)
5150 if (pdi
->tag
== DW_TAG_subprogram
)
5152 if (pdi
->has_pc_info
)
5154 if (pdi
->lowpc
< *lowpc
)
5155 *lowpc
= pdi
->lowpc
;
5156 if (pdi
->highpc
> *highpc
)
5157 *highpc
= pdi
->highpc
;
5161 struct objfile
*objfile
= cu
->objfile
;
5163 baseaddr
= ANOFFSET (objfile
->section_offsets
,
5164 SECT_OFF_TEXT (objfile
));
5165 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5166 pdi
->lowpc
+ baseaddr
,
5167 pdi
->highpc
- 1 + baseaddr
,
5168 cu
->per_cu
->v
.psymtab
);
5172 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
5174 if (!pdi
->is_declaration
)
5175 /* Ignore subprogram DIEs that do not have a name, they are
5176 illegal. Do not emit a complaint at this point, we will
5177 do so when we convert this psymtab into a symtab. */
5179 add_partial_symbol (pdi
, cu
);
5183 if (! pdi
->has_children
)
5186 if (cu
->language
== language_ada
)
5188 pdi
= pdi
->die_child
;
5191 fixup_partial_die (pdi
, cu
);
5192 if (pdi
->tag
== DW_TAG_subprogram
5193 || pdi
->tag
== DW_TAG_lexical_block
)
5194 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
5195 pdi
= pdi
->die_sibling
;
5200 /* Read a partial die corresponding to an enumeration type. */
5203 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
5204 struct dwarf2_cu
*cu
)
5206 struct partial_die_info
*pdi
;
5208 if (enum_pdi
->name
!= NULL
)
5209 add_partial_symbol (enum_pdi
, cu
);
5211 pdi
= enum_pdi
->die_child
;
5214 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
5215 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
5217 add_partial_symbol (pdi
, cu
);
5218 pdi
= pdi
->die_sibling
;
5222 /* Return the initial uleb128 in the die at INFO_PTR. */
5225 peek_abbrev_code (bfd
*abfd
, gdb_byte
*info_ptr
)
5227 unsigned int bytes_read
;
5229 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5232 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
5233 Return the corresponding abbrev, or NULL if the number is zero (indicating
5234 an empty DIE). In either case *BYTES_READ will be set to the length of
5235 the initial number. */
5237 static struct abbrev_info
*
5238 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
5239 struct dwarf2_cu
*cu
)
5241 bfd
*abfd
= cu
->objfile
->obfd
;
5242 unsigned int abbrev_number
;
5243 struct abbrev_info
*abbrev
;
5245 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
5247 if (abbrev_number
== 0)
5250 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
5253 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
5254 abbrev_number
, bfd_get_filename (abfd
));
5260 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
5261 Returns a pointer to the end of a series of DIEs, terminated by an empty
5262 DIE. Any children of the skipped DIEs will also be skipped. */
5265 skip_children (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
)
5267 struct dwarf2_cu
*cu
= reader
->cu
;
5268 struct abbrev_info
*abbrev
;
5269 unsigned int bytes_read
;
5273 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
5275 return info_ptr
+ bytes_read
;
5277 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
5281 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
5282 INFO_PTR should point just after the initial uleb128 of a DIE, and the
5283 abbrev corresponding to that skipped uleb128 should be passed in
5284 ABBREV. Returns a pointer to this DIE's sibling, skipping any
5288 skip_one_die (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
,
5289 struct abbrev_info
*abbrev
)
5291 unsigned int bytes_read
;
5292 struct attribute attr
;
5293 bfd
*abfd
= reader
->abfd
;
5294 struct dwarf2_cu
*cu
= reader
->cu
;
5295 gdb_byte
*buffer
= reader
->buffer
;
5296 const gdb_byte
*buffer_end
= reader
->buffer_end
;
5297 gdb_byte
*start_info_ptr
= info_ptr
;
5298 unsigned int form
, i
;
5300 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
5302 /* The only abbrev we care about is DW_AT_sibling. */
5303 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
5305 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
5306 if (attr
.form
== DW_FORM_ref_addr
)
5307 complaint (&symfile_complaints
,
5308 _("ignoring absolute DW_AT_sibling"));
5310 return buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
5313 /* If it isn't DW_AT_sibling, skip this attribute. */
5314 form
= abbrev
->attrs
[i
].form
;
5318 case DW_FORM_ref_addr
:
5319 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
5320 and later it is offset sized. */
5321 if (cu
->header
.version
== 2)
5322 info_ptr
+= cu
->header
.addr_size
;
5324 info_ptr
+= cu
->header
.offset_size
;
5327 info_ptr
+= cu
->header
.addr_size
;
5334 case DW_FORM_flag_present
:
5346 case DW_FORM_ref_sig8
:
5349 case DW_FORM_string
:
5350 read_direct_string (abfd
, info_ptr
, &bytes_read
);
5351 info_ptr
+= bytes_read
;
5353 case DW_FORM_sec_offset
:
5355 info_ptr
+= cu
->header
.offset_size
;
5357 case DW_FORM_exprloc
:
5359 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5360 info_ptr
+= bytes_read
;
5362 case DW_FORM_block1
:
5363 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
5365 case DW_FORM_block2
:
5366 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
5368 case DW_FORM_block4
:
5369 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
5373 case DW_FORM_ref_udata
:
5374 case DW_FORM_GNU_addr_index
:
5375 case DW_FORM_GNU_str_index
:
5376 info_ptr
= (gdb_byte
*) safe_skip_leb128 (info_ptr
, buffer_end
);
5378 case DW_FORM_indirect
:
5379 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5380 info_ptr
+= bytes_read
;
5381 /* We need to continue parsing from here, so just go back to
5383 goto skip_attribute
;
5386 error (_("Dwarf Error: Cannot handle %s "
5387 "in DWARF reader [in module %s]"),
5388 dwarf_form_name (form
),
5389 bfd_get_filename (abfd
));
5393 if (abbrev
->has_children
)
5394 return skip_children (reader
, info_ptr
);
5399 /* Locate ORIG_PDI's sibling.
5400 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
5403 locate_pdi_sibling (const struct die_reader_specs
*reader
,
5404 struct partial_die_info
*orig_pdi
,
5407 /* Do we know the sibling already? */
5409 if (orig_pdi
->sibling
)
5410 return orig_pdi
->sibling
;
5412 /* Are there any children to deal with? */
5414 if (!orig_pdi
->has_children
)
5417 /* Skip the children the long way. */
5419 return skip_children (reader
, info_ptr
);
5422 /* Expand this partial symbol table into a full symbol table. */
5425 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
5431 warning (_("bug: psymtab for %s is already read in."),
5438 printf_filtered (_("Reading in symbols for %s..."),
5440 gdb_flush (gdb_stdout
);
5443 /* Restore our global data. */
5444 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
5445 dwarf2_objfile_data_key
);
5447 /* If this psymtab is constructed from a debug-only objfile, the
5448 has_section_at_zero flag will not necessarily be correct. We
5449 can get the correct value for this flag by looking at the data
5450 associated with the (presumably stripped) associated objfile. */
5451 if (pst
->objfile
->separate_debug_objfile_backlink
)
5453 struct dwarf2_per_objfile
*dpo_backlink
5454 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
5455 dwarf2_objfile_data_key
);
5457 dwarf2_per_objfile
->has_section_at_zero
5458 = dpo_backlink
->has_section_at_zero
;
5461 dwarf2_per_objfile
->reading_partial_symbols
= 0;
5463 psymtab_to_symtab_1 (pst
);
5465 /* Finish up the debug error message. */
5467 printf_filtered (_("done.\n"));
5471 process_cu_includes ();
5474 /* Reading in full CUs. */
5476 /* Add PER_CU to the queue. */
5479 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
5480 enum language pretend_language
)
5482 struct dwarf2_queue_item
*item
;
5485 item
= xmalloc (sizeof (*item
));
5486 item
->per_cu
= per_cu
;
5487 item
->pretend_language
= pretend_language
;
5490 if (dwarf2_queue
== NULL
)
5491 dwarf2_queue
= item
;
5493 dwarf2_queue_tail
->next
= item
;
5495 dwarf2_queue_tail
= item
;
5498 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
5499 unit and add it to our queue.
5500 The result is non-zero if PER_CU was queued, otherwise the result is zero
5501 meaning either PER_CU is already queued or it is already loaded. */
5504 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
5505 struct dwarf2_per_cu_data
*per_cu
,
5506 enum language pretend_language
)
5508 /* We may arrive here during partial symbol reading, if we need full
5509 DIEs to process an unusual case (e.g. template arguments). Do
5510 not queue PER_CU, just tell our caller to load its DIEs. */
5511 if (dwarf2_per_objfile
->reading_partial_symbols
)
5513 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
5518 /* Mark the dependence relation so that we don't flush PER_CU
5520 dwarf2_add_dependence (this_cu
, per_cu
);
5522 /* If it's already on the queue, we have nothing to do. */
5526 /* If the compilation unit is already loaded, just mark it as
5528 if (per_cu
->cu
!= NULL
)
5530 per_cu
->cu
->last_used
= 0;
5534 /* Add it to the queue. */
5535 queue_comp_unit (per_cu
, pretend_language
);
5540 /* Process the queue. */
5543 process_queue (void)
5545 struct dwarf2_queue_item
*item
, *next_item
;
5547 if (dwarf2_read_debug
)
5549 fprintf_unfiltered (gdb_stdlog
,
5550 "Expanding one or more symtabs of objfile %s ...\n",
5551 dwarf2_per_objfile
->objfile
->name
);
5554 /* The queue starts out with one item, but following a DIE reference
5555 may load a new CU, adding it to the end of the queue. */
5556 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
5558 if (dwarf2_per_objfile
->using_index
5559 ? !item
->per_cu
->v
.quick
->symtab
5560 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
5561 process_full_comp_unit (item
->per_cu
, item
->pretend_language
);
5563 item
->per_cu
->queued
= 0;
5564 next_item
= item
->next
;
5568 dwarf2_queue_tail
= NULL
;
5570 if (dwarf2_read_debug
)
5572 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
5573 dwarf2_per_objfile
->objfile
->name
);
5577 /* Free all allocated queue entries. This function only releases anything if
5578 an error was thrown; if the queue was processed then it would have been
5579 freed as we went along. */
5582 dwarf2_release_queue (void *dummy
)
5584 struct dwarf2_queue_item
*item
, *last
;
5586 item
= dwarf2_queue
;
5589 /* Anything still marked queued is likely to be in an
5590 inconsistent state, so discard it. */
5591 if (item
->per_cu
->queued
)
5593 if (item
->per_cu
->cu
!= NULL
)
5594 free_one_cached_comp_unit (item
->per_cu
);
5595 item
->per_cu
->queued
= 0;
5603 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
5606 /* Read in full symbols for PST, and anything it depends on. */
5609 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
5611 struct dwarf2_per_cu_data
*per_cu
;
5617 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
5618 if (!pst
->dependencies
[i
]->readin
5619 && pst
->dependencies
[i
]->user
== NULL
)
5621 /* Inform about additional files that need to be read in. */
5624 /* FIXME: i18n: Need to make this a single string. */
5625 fputs_filtered (" ", gdb_stdout
);
5627 fputs_filtered ("and ", gdb_stdout
);
5629 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
5630 wrap_here (""); /* Flush output. */
5631 gdb_flush (gdb_stdout
);
5633 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
5636 per_cu
= pst
->read_symtab_private
;
5640 /* It's an include file, no symbols to read for it.
5641 Everything is in the parent symtab. */
5646 dw2_do_instantiate_symtab (per_cu
);
5649 /* Trivial hash function for die_info: the hash value of a DIE
5650 is its offset in .debug_info for this objfile. */
5653 die_hash (const void *item
)
5655 const struct die_info
*die
= item
;
5657 return die
->offset
.sect_off
;
5660 /* Trivial comparison function for die_info structures: two DIEs
5661 are equal if they have the same offset. */
5664 die_eq (const void *item_lhs
, const void *item_rhs
)
5666 const struct die_info
*die_lhs
= item_lhs
;
5667 const struct die_info
*die_rhs
= item_rhs
;
5669 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
5672 /* die_reader_func for load_full_comp_unit.
5673 This is identical to read_signatured_type_reader,
5674 but is kept separate for now. */
5677 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
5679 struct die_info
*comp_unit_die
,
5683 struct dwarf2_cu
*cu
= reader
->cu
;
5684 enum language
*language_ptr
= data
;
5686 gdb_assert (cu
->die_hash
== NULL
);
5688 htab_create_alloc_ex (cu
->header
.length
/ 12,
5692 &cu
->comp_unit_obstack
,
5693 hashtab_obstack_allocate
,
5694 dummy_obstack_deallocate
);
5697 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
5698 &info_ptr
, comp_unit_die
);
5699 cu
->dies
= comp_unit_die
;
5700 /* comp_unit_die is not stored in die_hash, no need. */
5702 /* We try not to read any attributes in this function, because not
5703 all CUs needed for references have been loaded yet, and symbol
5704 table processing isn't initialized. But we have to set the CU language,
5705 or we won't be able to build types correctly.
5706 Similarly, if we do not read the producer, we can not apply
5707 producer-specific interpretation. */
5708 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
5711 /* Load the DIEs associated with PER_CU into memory. */
5714 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
5715 enum language pretend_language
)
5717 gdb_assert (! this_cu
->is_debug_types
);
5719 init_cutu_and_read_dies (this_cu
, 1, 1, load_full_comp_unit_reader
,
5723 /* Add a DIE to the delayed physname list. */
5726 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
5727 const char *name
, struct die_info
*die
,
5728 struct dwarf2_cu
*cu
)
5730 struct delayed_method_info mi
;
5732 mi
.fnfield_index
= fnfield_index
;
5736 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
5739 /* A cleanup for freeing the delayed method list. */
5742 free_delayed_list (void *ptr
)
5744 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
5745 if (cu
->method_list
!= NULL
)
5747 VEC_free (delayed_method_info
, cu
->method_list
);
5748 cu
->method_list
= NULL
;
5752 /* Compute the physnames of any methods on the CU's method list.
5754 The computation of method physnames is delayed in order to avoid the
5755 (bad) condition that one of the method's formal parameters is of an as yet
5759 compute_delayed_physnames (struct dwarf2_cu
*cu
)
5762 struct delayed_method_info
*mi
;
5763 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
5765 const char *physname
;
5766 struct fn_fieldlist
*fn_flp
5767 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
5768 physname
= dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
5769 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
5773 /* Go objects should be embedded in a DW_TAG_module DIE,
5774 and it's not clear if/how imported objects will appear.
5775 To keep Go support simple until that's worked out,
5776 go back through what we've read and create something usable.
5777 We could do this while processing each DIE, and feels kinda cleaner,
5778 but that way is more invasive.
5779 This is to, for example, allow the user to type "p var" or "b main"
5780 without having to specify the package name, and allow lookups
5781 of module.object to work in contexts that use the expression
5785 fixup_go_packaging (struct dwarf2_cu
*cu
)
5787 char *package_name
= NULL
;
5788 struct pending
*list
;
5791 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
5793 for (i
= 0; i
< list
->nsyms
; ++i
)
5795 struct symbol
*sym
= list
->symbol
[i
];
5797 if (SYMBOL_LANGUAGE (sym
) == language_go
5798 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
5800 char *this_package_name
= go_symbol_package_name (sym
);
5802 if (this_package_name
== NULL
)
5804 if (package_name
== NULL
)
5805 package_name
= this_package_name
;
5808 if (strcmp (package_name
, this_package_name
) != 0)
5809 complaint (&symfile_complaints
,
5810 _("Symtab %s has objects from two different Go packages: %s and %s"),
5811 (sym
->symtab
&& sym
->symtab
->filename
5812 ? sym
->symtab
->filename
5813 : cu
->objfile
->name
),
5814 this_package_name
, package_name
);
5815 xfree (this_package_name
);
5821 if (package_name
!= NULL
)
5823 struct objfile
*objfile
= cu
->objfile
;
5824 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
5825 package_name
, objfile
);
5828 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5830 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
5831 SYMBOL_SET_LANGUAGE (sym
, language_go
);
5832 SYMBOL_SET_NAMES (sym
, package_name
, strlen (package_name
), 1, objfile
);
5833 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
5834 e.g., "main" finds the "main" module and not C's main(). */
5835 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
5836 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
5837 SYMBOL_TYPE (sym
) = type
;
5839 add_symbol_to_list (sym
, &global_symbols
);
5841 xfree (package_name
);
5845 static void compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
);
5847 /* Return the symtab for PER_CU. This works properly regardless of
5848 whether we're using the index or psymtabs. */
5850 static struct symtab
*
5851 get_symtab (struct dwarf2_per_cu_data
*per_cu
)
5853 return (dwarf2_per_objfile
->using_index
5854 ? per_cu
->v
.quick
->symtab
5855 : per_cu
->v
.psymtab
->symtab
);
5858 /* A helper function for computing the list of all symbol tables
5859 included by PER_CU. */
5862 recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr
) **result
,
5863 htab_t all_children
,
5864 struct dwarf2_per_cu_data
*per_cu
)
5868 struct dwarf2_per_cu_data
*iter
;
5870 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
5873 /* This inclusion and its children have been processed. */
5878 /* Only add a CU if it has a symbol table. */
5879 if (get_symtab (per_cu
) != NULL
)
5880 VEC_safe_push (dwarf2_per_cu_ptr
, *result
, per_cu
);
5883 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
5885 recursively_compute_inclusions (result
, all_children
, iter
);
5888 /* Compute the symtab 'includes' fields for the symtab related to
5892 compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
5894 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
5897 struct dwarf2_per_cu_data
*iter
;
5898 VEC (dwarf2_per_cu_ptr
) *result_children
= NULL
;
5899 htab_t all_children
;
5900 struct symtab
*symtab
= get_symtab (per_cu
);
5902 /* If we don't have a symtab, we can just skip this case. */
5906 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
5907 NULL
, xcalloc
, xfree
);
5910 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
5913 recursively_compute_inclusions (&result_children
, all_children
, iter
);
5915 /* Now we have a transitive closure of all the included CUs, so
5916 we can convert it to a list of symtabs. */
5917 len
= VEC_length (dwarf2_per_cu_ptr
, result_children
);
5919 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
5920 (len
+ 1) * sizeof (struct symtab
*));
5922 VEC_iterate (dwarf2_per_cu_ptr
, result_children
, ix
, iter
);
5924 symtab
->includes
[ix
] = get_symtab (iter
);
5925 symtab
->includes
[len
] = NULL
;
5927 VEC_free (dwarf2_per_cu_ptr
, result_children
);
5928 htab_delete (all_children
);
5932 /* Compute the 'includes' field for the symtabs of all the CUs we just
5936 process_cu_includes (void)
5939 struct dwarf2_per_cu_data
*iter
;
5942 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
5945 compute_symtab_includes (iter
);
5947 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
5950 /* Generate full symbol information for PER_CU, whose DIEs have
5951 already been loaded into memory. */
5954 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
5955 enum language pretend_language
)
5957 struct dwarf2_cu
*cu
= per_cu
->cu
;
5958 struct objfile
*objfile
= per_cu
->objfile
;
5959 CORE_ADDR lowpc
, highpc
;
5960 struct symtab
*symtab
;
5961 struct cleanup
*back_to
, *delayed_list_cleanup
;
5964 if (dwarf2_read_debug
)
5966 fprintf_unfiltered (gdb_stdlog
,
5967 "Expanding symtab of %s at offset 0x%x\n",
5968 per_cu
->is_debug_types
? "TU" : "CU",
5969 per_cu
->offset
.sect_off
);
5972 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5975 back_to
= make_cleanup (really_free_pendings
, NULL
);
5976 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
5978 cu
->list_in_scope
= &file_symbols
;
5980 cu
->language
= pretend_language
;
5981 cu
->language_defn
= language_def (cu
->language
);
5983 /* Do line number decoding in read_file_scope () */
5984 process_die (cu
->dies
, cu
);
5986 /* For now fudge the Go package. */
5987 if (cu
->language
== language_go
)
5988 fixup_go_packaging (cu
);
5990 /* Now that we have processed all the DIEs in the CU, all the types
5991 should be complete, and it should now be safe to compute all of the
5993 compute_delayed_physnames (cu
);
5994 do_cleanups (delayed_list_cleanup
);
5996 /* Some compilers don't define a DW_AT_high_pc attribute for the
5997 compilation unit. If the DW_AT_high_pc is missing, synthesize
5998 it, by scanning the DIE's below the compilation unit. */
5999 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
6001 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
6005 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
6007 /* Set symtab language to language from DW_AT_language. If the
6008 compilation is from a C file generated by language preprocessors, do
6009 not set the language if it was already deduced by start_subfile. */
6010 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
6011 symtab
->language
= cu
->language
;
6013 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
6014 produce DW_AT_location with location lists but it can be possibly
6015 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
6016 there were bugs in prologue debug info, fixed later in GCC-4.5
6017 by "unwind info for epilogues" patch (which is not directly related).
6019 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
6020 needed, it would be wrong due to missing DW_AT_producer there.
6022 Still one can confuse GDB by using non-standard GCC compilation
6023 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
6025 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
6026 symtab
->locations_valid
= 1;
6028 if (gcc_4_minor
>= 5)
6029 symtab
->epilogue_unwind_valid
= 1;
6031 symtab
->call_site_htab
= cu
->call_site_htab
;
6034 if (dwarf2_per_objfile
->using_index
)
6035 per_cu
->v
.quick
->symtab
= symtab
;
6038 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6039 pst
->symtab
= symtab
;
6043 /* Push it for inclusion processing later. */
6044 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
6046 do_cleanups (back_to
);
6048 if (dwarf2_read_debug
)
6050 fprintf_unfiltered (gdb_stdlog
,
6051 "Done expanding symtab of %s at offset 0x%x\n",
6052 per_cu
->is_debug_types
? "TU" : "CU",
6053 per_cu
->offset
.sect_off
);
6057 /* Process an imported unit DIE. */
6060 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
6062 struct attribute
*attr
;
6064 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
6067 struct dwarf2_per_cu_data
*per_cu
;
6068 struct symtab
*imported_symtab
;
6071 offset
= dwarf2_get_ref_die_offset (attr
);
6072 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
6074 /* Queue the unit, if needed. */
6075 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
6076 load_full_comp_unit (per_cu
, cu
->language
);
6078 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6083 /* Process a die and its children. */
6086 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
6090 case DW_TAG_padding
:
6092 case DW_TAG_compile_unit
:
6093 case DW_TAG_partial_unit
:
6094 read_file_scope (die
, cu
);
6096 case DW_TAG_type_unit
:
6097 read_type_unit_scope (die
, cu
);
6099 case DW_TAG_subprogram
:
6100 case DW_TAG_inlined_subroutine
:
6101 read_func_scope (die
, cu
);
6103 case DW_TAG_lexical_block
:
6104 case DW_TAG_try_block
:
6105 case DW_TAG_catch_block
:
6106 read_lexical_block_scope (die
, cu
);
6108 case DW_TAG_GNU_call_site
:
6109 read_call_site_scope (die
, cu
);
6111 case DW_TAG_class_type
:
6112 case DW_TAG_interface_type
:
6113 case DW_TAG_structure_type
:
6114 case DW_TAG_union_type
:
6115 process_structure_scope (die
, cu
);
6117 case DW_TAG_enumeration_type
:
6118 process_enumeration_scope (die
, cu
);
6121 /* These dies have a type, but processing them does not create
6122 a symbol or recurse to process the children. Therefore we can
6123 read them on-demand through read_type_die. */
6124 case DW_TAG_subroutine_type
:
6125 case DW_TAG_set_type
:
6126 case DW_TAG_array_type
:
6127 case DW_TAG_pointer_type
:
6128 case DW_TAG_ptr_to_member_type
:
6129 case DW_TAG_reference_type
:
6130 case DW_TAG_string_type
:
6133 case DW_TAG_base_type
:
6134 case DW_TAG_subrange_type
:
6135 case DW_TAG_typedef
:
6136 /* Add a typedef symbol for the type definition, if it has a
6138 new_symbol (die
, read_type_die (die
, cu
), cu
);
6140 case DW_TAG_common_block
:
6141 read_common_block (die
, cu
);
6143 case DW_TAG_common_inclusion
:
6145 case DW_TAG_namespace
:
6146 processing_has_namespace_info
= 1;
6147 read_namespace (die
, cu
);
6150 processing_has_namespace_info
= 1;
6151 read_module (die
, cu
);
6153 case DW_TAG_imported_declaration
:
6154 case DW_TAG_imported_module
:
6155 processing_has_namespace_info
= 1;
6156 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
6157 || cu
->language
!= language_fortran
))
6158 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
6159 dwarf_tag_name (die
->tag
));
6160 read_import_statement (die
, cu
);
6163 case DW_TAG_imported_unit
:
6164 process_imported_unit_die (die
, cu
);
6168 new_symbol (die
, NULL
, cu
);
6173 /* A helper function for dwarf2_compute_name which determines whether DIE
6174 needs to have the name of the scope prepended to the name listed in the
6178 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
6180 struct attribute
*attr
;
6184 case DW_TAG_namespace
:
6185 case DW_TAG_typedef
:
6186 case DW_TAG_class_type
:
6187 case DW_TAG_interface_type
:
6188 case DW_TAG_structure_type
:
6189 case DW_TAG_union_type
:
6190 case DW_TAG_enumeration_type
:
6191 case DW_TAG_enumerator
:
6192 case DW_TAG_subprogram
:
6196 case DW_TAG_variable
:
6197 case DW_TAG_constant
:
6198 /* We only need to prefix "globally" visible variables. These include
6199 any variable marked with DW_AT_external or any variable that
6200 lives in a namespace. [Variables in anonymous namespaces
6201 require prefixing, but they are not DW_AT_external.] */
6203 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
6205 struct dwarf2_cu
*spec_cu
= cu
;
6207 return die_needs_namespace (die_specification (die
, &spec_cu
),
6211 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
6212 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
6213 && die
->parent
->tag
!= DW_TAG_module
)
6215 /* A variable in a lexical block of some kind does not need a
6216 namespace, even though in C++ such variables may be external
6217 and have a mangled name. */
6218 if (die
->parent
->tag
== DW_TAG_lexical_block
6219 || die
->parent
->tag
== DW_TAG_try_block
6220 || die
->parent
->tag
== DW_TAG_catch_block
6221 || die
->parent
->tag
== DW_TAG_subprogram
)
6230 /* Retrieve the last character from a mem_file. */
6233 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
6235 char *last_char_p
= (char *) object
;
6238 *last_char_p
= buffer
[length
- 1];
6241 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
6242 compute the physname for the object, which include a method's:
6243 - formal parameters (C++/Java),
6244 - receiver type (Go),
6245 - return type (Java).
6247 The term "physname" is a bit confusing.
6248 For C++, for example, it is the demangled name.
6249 For Go, for example, it's the mangled name.
6251 For Ada, return the DIE's linkage name rather than the fully qualified
6252 name. PHYSNAME is ignored..
6254 The result is allocated on the objfile_obstack and canonicalized. */
6257 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
6260 struct objfile
*objfile
= cu
->objfile
;
6263 name
= dwarf2_name (die
, cu
);
6265 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
6266 compute it by typename_concat inside GDB. */
6267 if (cu
->language
== language_ada
6268 || (cu
->language
== language_fortran
&& physname
))
6270 /* For Ada unit, we prefer the linkage name over the name, as
6271 the former contains the exported name, which the user expects
6272 to be able to reference. Ideally, we want the user to be able
6273 to reference this entity using either natural or linkage name,
6274 but we haven't started looking at this enhancement yet. */
6275 struct attribute
*attr
;
6277 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
6279 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
6280 if (attr
&& DW_STRING (attr
))
6281 return DW_STRING (attr
);
6284 /* These are the only languages we know how to qualify names in. */
6286 && (cu
->language
== language_cplus
|| cu
->language
== language_java
6287 || cu
->language
== language_fortran
))
6289 if (die_needs_namespace (die
, cu
))
6293 struct ui_file
*buf
;
6295 prefix
= determine_prefix (die
, cu
);
6296 buf
= mem_fileopen ();
6297 if (*prefix
!= '\0')
6299 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
6302 fputs_unfiltered (prefixed_name
, buf
);
6303 xfree (prefixed_name
);
6306 fputs_unfiltered (name
, buf
);
6308 /* Template parameters may be specified in the DIE's DW_AT_name, or
6309 as children with DW_TAG_template_type_param or
6310 DW_TAG_value_type_param. If the latter, add them to the name
6311 here. If the name already has template parameters, then
6312 skip this step; some versions of GCC emit both, and
6313 it is more efficient to use the pre-computed name.
6315 Something to keep in mind about this process: it is very
6316 unlikely, or in some cases downright impossible, to produce
6317 something that will match the mangled name of a function.
6318 If the definition of the function has the same debug info,
6319 we should be able to match up with it anyway. But fallbacks
6320 using the minimal symbol, for instance to find a method
6321 implemented in a stripped copy of libstdc++, will not work.
6322 If we do not have debug info for the definition, we will have to
6323 match them up some other way.
6325 When we do name matching there is a related problem with function
6326 templates; two instantiated function templates are allowed to
6327 differ only by their return types, which we do not add here. */
6329 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
6331 struct attribute
*attr
;
6332 struct die_info
*child
;
6335 die
->building_fullname
= 1;
6337 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
6342 struct dwarf2_locexpr_baton
*baton
;
6345 if (child
->tag
!= DW_TAG_template_type_param
6346 && child
->tag
!= DW_TAG_template_value_param
)
6351 fputs_unfiltered ("<", buf
);
6355 fputs_unfiltered (", ", buf
);
6357 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
6360 complaint (&symfile_complaints
,
6361 _("template parameter missing DW_AT_type"));
6362 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
6365 type
= die_type (child
, cu
);
6367 if (child
->tag
== DW_TAG_template_type_param
)
6369 c_print_type (type
, "", buf
, -1, 0);
6373 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
6376 complaint (&symfile_complaints
,
6377 _("template parameter missing "
6378 "DW_AT_const_value"));
6379 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
6383 dwarf2_const_value_attr (attr
, type
, name
,
6384 &cu
->comp_unit_obstack
, cu
,
6385 &value
, &bytes
, &baton
);
6387 if (TYPE_NOSIGN (type
))
6388 /* GDB prints characters as NUMBER 'CHAR'. If that's
6389 changed, this can use value_print instead. */
6390 c_printchar (value
, type
, buf
);
6393 struct value_print_options opts
;
6396 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
6400 else if (bytes
!= NULL
)
6402 v
= allocate_value (type
);
6403 memcpy (value_contents_writeable (v
), bytes
,
6404 TYPE_LENGTH (type
));
6407 v
= value_from_longest (type
, value
);
6409 /* Specify decimal so that we do not depend on
6411 get_formatted_print_options (&opts
, 'd');
6413 value_print (v
, buf
, &opts
);
6419 die
->building_fullname
= 0;
6423 /* Close the argument list, with a space if necessary
6424 (nested templates). */
6425 char last_char
= '\0';
6426 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
6427 if (last_char
== '>')
6428 fputs_unfiltered (" >", buf
);
6430 fputs_unfiltered (">", buf
);
6434 /* For Java and C++ methods, append formal parameter type
6435 information, if PHYSNAME. */
6437 if (physname
&& die
->tag
== DW_TAG_subprogram
6438 && (cu
->language
== language_cplus
6439 || cu
->language
== language_java
))
6441 struct type
*type
= read_type_die (die
, cu
);
6443 c_type_print_args (type
, buf
, 1, cu
->language
);
6445 if (cu
->language
== language_java
)
6447 /* For java, we must append the return type to method
6449 if (die
->tag
== DW_TAG_subprogram
)
6450 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
6453 else if (cu
->language
== language_cplus
)
6455 /* Assume that an artificial first parameter is
6456 "this", but do not crash if it is not. RealView
6457 marks unnamed (and thus unused) parameters as
6458 artificial; there is no way to differentiate
6460 if (TYPE_NFIELDS (type
) > 0
6461 && TYPE_FIELD_ARTIFICIAL (type
, 0)
6462 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
6463 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
6465 fputs_unfiltered (" const", buf
);
6469 name
= ui_file_obsavestring (buf
, &objfile
->objfile_obstack
,
6471 ui_file_delete (buf
);
6473 if (cu
->language
== language_cplus
)
6476 = dwarf2_canonicalize_name (name
, cu
,
6477 &objfile
->objfile_obstack
);
6488 /* Return the fully qualified name of DIE, based on its DW_AT_name.
6489 If scope qualifiers are appropriate they will be added. The result
6490 will be allocated on the objfile_obstack, or NULL if the DIE does
6491 not have a name. NAME may either be from a previous call to
6492 dwarf2_name or NULL.
6494 The output string will be canonicalized (if C++/Java). */
6497 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
6499 return dwarf2_compute_name (name
, die
, cu
, 0);
6502 /* Construct a physname for the given DIE in CU. NAME may either be
6503 from a previous call to dwarf2_name or NULL. The result will be
6504 allocated on the objfile_objstack or NULL if the DIE does not have a
6507 The output string will be canonicalized (if C++/Java). */
6510 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
6512 struct objfile
*objfile
= cu
->objfile
;
6513 struct attribute
*attr
;
6514 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
6515 struct cleanup
*back_to
;
6518 /* In this case dwarf2_compute_name is just a shortcut not building anything
6520 if (!die_needs_namespace (die
, cu
))
6521 return dwarf2_compute_name (name
, die
, cu
, 1);
6523 back_to
= make_cleanup (null_cleanup
, NULL
);
6525 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
6527 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
6529 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
6531 if (attr
&& DW_STRING (attr
))
6535 mangled
= DW_STRING (attr
);
6537 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
6538 type. It is easier for GDB users to search for such functions as
6539 `name(params)' than `long name(params)'. In such case the minimal
6540 symbol names do not match the full symbol names but for template
6541 functions there is never a need to look up their definition from their
6542 declaration so the only disadvantage remains the minimal symbol
6543 variant `long name(params)' does not have the proper inferior type.
6546 if (cu
->language
== language_go
)
6548 /* This is a lie, but we already lie to the caller new_symbol_full.
6549 new_symbol_full assumes we return the mangled name.
6550 This just undoes that lie until things are cleaned up. */
6555 demangled
= cplus_demangle (mangled
,
6556 (DMGL_PARAMS
| DMGL_ANSI
6557 | (cu
->language
== language_java
6558 ? DMGL_JAVA
| DMGL_RET_POSTFIX
6563 make_cleanup (xfree
, demangled
);
6573 if (canon
== NULL
|| check_physname
)
6575 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
6577 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
6579 /* It may not mean a bug in GDB. The compiler could also
6580 compute DW_AT_linkage_name incorrectly. But in such case
6581 GDB would need to be bug-to-bug compatible. */
6583 complaint (&symfile_complaints
,
6584 _("Computed physname <%s> does not match demangled <%s> "
6585 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
6586 physname
, canon
, mangled
, die
->offset
.sect_off
, objfile
->name
);
6588 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
6589 is available here - over computed PHYSNAME. It is safer
6590 against both buggy GDB and buggy compilers. */
6604 retval
= obsavestring (retval
, strlen (retval
),
6605 &objfile
->objfile_obstack
);
6607 do_cleanups (back_to
);
6611 /* Read the import statement specified by the given die and record it. */
6614 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
6616 struct objfile
*objfile
= cu
->objfile
;
6617 struct attribute
*import_attr
;
6618 struct die_info
*imported_die
, *child_die
;
6619 struct dwarf2_cu
*imported_cu
;
6620 const char *imported_name
;
6621 const char *imported_name_prefix
;
6622 const char *canonical_name
;
6623 const char *import_alias
;
6624 const char *imported_declaration
= NULL
;
6625 const char *import_prefix
;
6626 VEC (const_char_ptr
) *excludes
= NULL
;
6627 struct cleanup
*cleanups
;
6631 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
6632 if (import_attr
== NULL
)
6634 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
6635 dwarf_tag_name (die
->tag
));
6640 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
6641 imported_name
= dwarf2_name (imported_die
, imported_cu
);
6642 if (imported_name
== NULL
)
6644 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
6646 The import in the following code:
6660 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
6661 <52> DW_AT_decl_file : 1
6662 <53> DW_AT_decl_line : 6
6663 <54> DW_AT_import : <0x75>
6664 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
6666 <5b> DW_AT_decl_file : 1
6667 <5c> DW_AT_decl_line : 2
6668 <5d> DW_AT_type : <0x6e>
6670 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
6671 <76> DW_AT_byte_size : 4
6672 <77> DW_AT_encoding : 5 (signed)
6674 imports the wrong die ( 0x75 instead of 0x58 ).
6675 This case will be ignored until the gcc bug is fixed. */
6679 /* Figure out the local name after import. */
6680 import_alias
= dwarf2_name (die
, cu
);
6682 /* Figure out where the statement is being imported to. */
6683 import_prefix
= determine_prefix (die
, cu
);
6685 /* Figure out what the scope of the imported die is and prepend it
6686 to the name of the imported die. */
6687 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
6689 if (imported_die
->tag
!= DW_TAG_namespace
6690 && imported_die
->tag
!= DW_TAG_module
)
6692 imported_declaration
= imported_name
;
6693 canonical_name
= imported_name_prefix
;
6695 else if (strlen (imported_name_prefix
) > 0)
6697 temp
= alloca (strlen (imported_name_prefix
)
6698 + 2 + strlen (imported_name
) + 1);
6699 strcpy (temp
, imported_name_prefix
);
6700 strcat (temp
, "::");
6701 strcat (temp
, imported_name
);
6702 canonical_name
= temp
;
6705 canonical_name
= imported_name
;
6707 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
6709 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
6710 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
6711 child_die
= sibling_die (child_die
))
6713 /* DWARF-4: A Fortran use statement with a “rename list” may be
6714 represented by an imported module entry with an import attribute
6715 referring to the module and owned entries corresponding to those
6716 entities that are renamed as part of being imported. */
6718 if (child_die
->tag
!= DW_TAG_imported_declaration
)
6720 complaint (&symfile_complaints
,
6721 _("child DW_TAG_imported_declaration expected "
6722 "- DIE at 0x%x [in module %s]"),
6723 child_die
->offset
.sect_off
, objfile
->name
);
6727 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
6728 if (import_attr
== NULL
)
6730 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
6731 dwarf_tag_name (child_die
->tag
));
6736 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
6738 imported_name
= dwarf2_name (imported_die
, imported_cu
);
6739 if (imported_name
== NULL
)
6741 complaint (&symfile_complaints
,
6742 _("child DW_TAG_imported_declaration has unknown "
6743 "imported name - DIE at 0x%x [in module %s]"),
6744 child_die
->offset
.sect_off
, objfile
->name
);
6748 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
6750 process_die (child_die
, cu
);
6753 cp_add_using_directive (import_prefix
,
6756 imported_declaration
,
6758 &objfile
->objfile_obstack
);
6760 do_cleanups (cleanups
);
6763 /* Cleanup function for read_file_scope. */
6766 free_cu_line_header (void *arg
)
6768 struct dwarf2_cu
*cu
= arg
;
6770 free_line_header (cu
->line_header
);
6771 cu
->line_header
= NULL
;
6775 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
6776 char **name
, char **comp_dir
)
6778 struct attribute
*attr
;
6783 /* Find the filename. Do not use dwarf2_name here, since the filename
6784 is not a source language identifier. */
6785 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
6788 *name
= DW_STRING (attr
);
6791 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
6793 *comp_dir
= DW_STRING (attr
);
6794 else if (*name
!= NULL
&& IS_ABSOLUTE_PATH (*name
))
6796 *comp_dir
= ldirname (*name
);
6797 if (*comp_dir
!= NULL
)
6798 make_cleanup (xfree
, *comp_dir
);
6800 if (*comp_dir
!= NULL
)
6802 /* Irix 6.2 native cc prepends <machine>.: to the compilation
6803 directory, get rid of it. */
6804 char *cp
= strchr (*comp_dir
, ':');
6806 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
6811 *name
= "<unknown>";
6814 /* Handle DW_AT_stmt_list for a compilation unit or type unit.
6815 DIE is the DW_TAG_compile_unit or DW_TAG_type_unit die for CU.
6816 COMP_DIR is the compilation directory.
6817 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
6820 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
6821 const char *comp_dir
, int want_line_info
)
6823 struct attribute
*attr
;
6825 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6828 unsigned int line_offset
= DW_UNSND (attr
);
6829 struct line_header
*line_header
6830 = dwarf_decode_line_header (line_offset
, cu
);
6834 cu
->line_header
= line_header
;
6835 make_cleanup (free_cu_line_header
, cu
);
6836 dwarf_decode_lines (line_header
, comp_dir
, cu
, NULL
, want_line_info
);
6841 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
6844 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6846 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6847 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
6848 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
6849 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
6850 struct attribute
*attr
;
6852 char *comp_dir
= NULL
;
6853 struct die_info
*child_die
;
6854 bfd
*abfd
= objfile
->obfd
;
6857 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6859 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
6861 /* If we didn't find a lowpc, set it to highpc to avoid complaints
6862 from finish_block. */
6863 if (lowpc
== ((CORE_ADDR
) -1))
6868 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
6870 prepare_one_comp_unit (cu
, die
, cu
->language
);
6872 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
6873 standardised yet. As a workaround for the language detection we fall
6874 back to the DW_AT_producer string. */
6875 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
6876 cu
->language
= language_opencl
;
6878 /* Similar hack for Go. */
6879 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
6880 set_cu_language (DW_LANG_Go
, cu
);
6882 /* We assume that we're processing GCC output. */
6883 processing_gcc_compilation
= 2;
6885 processing_has_namespace_info
= 0;
6887 start_symtab (name
, comp_dir
, lowpc
);
6888 record_debugformat ("DWARF 2");
6889 record_producer (cu
->producer
);
6891 /* Decode line number information if present. We do this before
6892 processing child DIEs, so that the line header table is available
6893 for DW_AT_decl_file. */
6894 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, 1);
6896 /* Process all dies in compilation unit. */
6897 if (die
->child
!= NULL
)
6899 child_die
= die
->child
;
6900 while (child_die
&& child_die
->tag
)
6902 process_die (child_die
, cu
);
6903 child_die
= sibling_die (child_die
);
6907 /* Decode macro information, if present. Dwarf 2 macro information
6908 refers to information in the line number info statement program
6909 header, so we can only read it if we've read the header
6911 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
6912 if (attr
&& cu
->line_header
)
6914 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
6915 complaint (&symfile_complaints
,
6916 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
6918 dwarf_decode_macros (cu
, DW_UNSND (attr
), comp_dir
, 1);
6922 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
6923 if (attr
&& cu
->line_header
)
6925 unsigned int macro_offset
= DW_UNSND (attr
);
6927 dwarf_decode_macros (cu
, macro_offset
, comp_dir
, 0);
6931 do_cleanups (back_to
);
6934 /* Process DW_TAG_type_unit.
6935 For TUs we want to skip the first top level sibling if it's not the
6936 actual type being defined by this TU. In this case the first top
6937 level sibling is there to provide context only. */
6940 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6942 struct objfile
*objfile
= cu
->objfile
;
6943 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
6945 struct attribute
*attr
;
6947 char *comp_dir
= NULL
;
6948 struct die_info
*child_die
;
6949 bfd
*abfd
= objfile
->obfd
;
6951 /* start_symtab needs a low pc, but we don't really have one.
6952 Do what read_file_scope would do in the absence of such info. */
6953 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6955 /* Find the filename. Do not use dwarf2_name here, since the filename
6956 is not a source language identifier. */
6957 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
6959 name
= DW_STRING (attr
);
6961 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
6963 comp_dir
= DW_STRING (attr
);
6964 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
6966 comp_dir
= ldirname (name
);
6967 if (comp_dir
!= NULL
)
6968 make_cleanup (xfree
, comp_dir
);
6974 prepare_one_comp_unit (cu
, die
, language_minimal
);
6976 /* We assume that we're processing GCC output. */
6977 processing_gcc_compilation
= 2;
6979 processing_has_namespace_info
= 0;
6981 start_symtab (name
, comp_dir
, lowpc
);
6982 record_debugformat ("DWARF 2");
6983 record_producer (cu
->producer
);
6985 /* Decode line number information if present. We do this before
6986 processing child DIEs, so that the line header table is available
6987 for DW_AT_decl_file.
6988 We don't need the pc/line-number mapping for type units. */
6989 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, 0);
6991 /* Process the dies in the type unit. */
6992 if (die
->child
== NULL
)
6994 dump_die_for_error (die
);
6995 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
6996 bfd_get_filename (abfd
));
6999 child_die
= die
->child
;
7001 while (child_die
&& child_die
->tag
)
7003 process_die (child_die
, cu
);
7005 child_die
= sibling_die (child_die
);
7008 do_cleanups (back_to
);
7014 hash_dwo_file (const void *item
)
7016 const struct dwo_file
*dwo_file
= item
;
7018 return htab_hash_string (dwo_file
->dwo_name
);
7022 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
7024 const struct dwo_file
*lhs
= item_lhs
;
7025 const struct dwo_file
*rhs
= item_rhs
;
7027 return strcmp (lhs
->dwo_name
, rhs
->dwo_name
) == 0;
7030 /* Allocate a hash table for DWO files. */
7033 allocate_dwo_file_hash_table (void)
7035 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7037 return htab_create_alloc_ex (41,
7041 &objfile
->objfile_obstack
,
7042 hashtab_obstack_allocate
,
7043 dummy_obstack_deallocate
);
7047 hash_dwo_unit (const void *item
)
7049 const struct dwo_unit
*dwo_unit
= item
;
7051 /* This drops the top 32 bits of the id, but is ok for a hash. */
7052 return dwo_unit
->signature
;
7056 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
7058 const struct dwo_unit
*lhs
= item_lhs
;
7059 const struct dwo_unit
*rhs
= item_rhs
;
7061 /* The signature is assumed to be unique within the DWO file.
7062 So while object file CU dwo_id's always have the value zero,
7063 that's OK, assuming each object file DWO file has only one CU,
7064 and that's the rule for now. */
7065 return lhs
->signature
== rhs
->signature
;
7068 /* Allocate a hash table for DWO CUs,TUs.
7069 There is one of these tables for each of CUs,TUs for each DWO file. */
7072 allocate_dwo_unit_table (struct objfile
*objfile
)
7074 /* Start out with a pretty small number.
7075 Generally DWO files contain only one CU and maybe some TUs. */
7076 return htab_create_alloc_ex (3,
7080 &objfile
->objfile_obstack
,
7081 hashtab_obstack_allocate
,
7082 dummy_obstack_deallocate
);
7085 /* This function is mapped across the sections and remembers the offset and
7086 size of each of the DWO debugging sections we are interested in. */
7089 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_file_ptr
)
7091 struct dwo_file
*dwo_file
= dwo_file_ptr
;
7092 const struct dwo_section_names
*names
= &dwo_section_names
;
7094 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
7096 dwo_file
->sections
.abbrev
.asection
= sectp
;
7097 dwo_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
7099 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
7101 dwo_file
->sections
.info
.asection
= sectp
;
7102 dwo_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
7104 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
7106 dwo_file
->sections
.line
.asection
= sectp
;
7107 dwo_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
7109 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
7111 dwo_file
->sections
.loc
.asection
= sectp
;
7112 dwo_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
7114 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
7116 dwo_file
->sections
.macinfo
.asection
= sectp
;
7117 dwo_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
7119 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
7121 dwo_file
->sections
.macro
.asection
= sectp
;
7122 dwo_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
7124 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
7126 dwo_file
->sections
.str
.asection
= sectp
;
7127 dwo_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
7129 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
7131 dwo_file
->sections
.str_offsets
.asection
= sectp
;
7132 dwo_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
7134 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
7136 struct dwarf2_section_info type_section
;
7138 memset (&type_section
, 0, sizeof (type_section
));
7139 type_section
.asection
= sectp
;
7140 type_section
.size
= bfd_get_section_size (sectp
);
7141 VEC_safe_push (dwarf2_section_info_def
, dwo_file
->sections
.types
,
7146 /* Structure used to pass data to create_debug_info_hash_table_reader. */
7148 struct create_dwo_info_table_data
7150 struct dwo_file
*dwo_file
;
7154 /* die_reader_func for create_debug_info_hash_table. */
7157 create_debug_info_hash_table_reader (const struct die_reader_specs
*reader
,
7159 struct die_info
*comp_unit_die
,
7163 struct dwarf2_cu
*cu
= reader
->cu
;
7164 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7165 sect_offset offset
= cu
->per_cu
->offset
;
7166 struct dwarf2_section_info
*section
= cu
->per_cu
->info_or_types_section
;
7167 struct create_dwo_info_table_data
*data
= datap
;
7168 struct dwo_file
*dwo_file
= data
->dwo_file
;
7169 htab_t cu_htab
= data
->cu_htab
;
7171 struct attribute
*attr
;
7172 struct dwo_unit
*dwo_unit
;
7174 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7177 error (_("Dwarf Error: debug entry at offset 0x%x is missing"
7178 " its dwo_id [in module %s]"),
7179 offset
.sect_off
, dwo_file
->dwo_name
);
7183 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
7184 dwo_unit
->dwo_file
= dwo_file
;
7185 dwo_unit
->signature
= DW_UNSND (attr
);
7186 dwo_unit
->info_or_types_section
= section
;
7187 dwo_unit
->offset
= offset
;
7188 dwo_unit
->length
= cu
->per_cu
->length
;
7190 slot
= htab_find_slot (cu_htab
, dwo_unit
, INSERT
);
7191 gdb_assert (slot
!= NULL
);
7194 const struct dwo_unit
*dup_dwo_unit
= *slot
;
7196 complaint (&symfile_complaints
,
7197 _("debug entry at offset 0x%x is duplicate to the entry at"
7198 " offset 0x%x, dwo_id 0x%s [in module %s]"),
7199 offset
.sect_off
, dup_dwo_unit
->offset
.sect_off
,
7200 phex (dwo_unit
->signature
, sizeof (dwo_unit
->signature
)),
7201 dwo_file
->dwo_name
);
7206 if (dwarf2_read_debug
)
7207 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id 0x%s\n",
7209 phex (dwo_unit
->signature
,
7210 sizeof (dwo_unit
->signature
)));
7213 /* Create a hash table to map DWO IDs to their CU entry in .debug_info.dwo. */
7216 create_debug_info_hash_table (struct dwo_file
*dwo_file
)
7218 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7219 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
7222 gdb_byte
*info_ptr
, *end_ptr
;
7223 struct create_dwo_info_table_data create_dwo_info_table_data
;
7225 dwarf2_read_section (objfile
, section
);
7226 info_ptr
= section
->buffer
;
7228 if (info_ptr
== NULL
)
7231 /* We can't set abfd until now because the section may be empty or
7232 not present, in which case section->asection will be NULL. */
7233 abfd
= section
->asection
->owner
;
7235 if (dwarf2_read_debug
)
7236 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_info.dwo for %s:\n",
7237 bfd_get_filename (abfd
));
7239 cu_htab
= allocate_dwo_unit_table (objfile
);
7241 create_dwo_info_table_data
.dwo_file
= dwo_file
;
7242 create_dwo_info_table_data
.cu_htab
= cu_htab
;
7244 end_ptr
= info_ptr
+ section
->size
;
7245 while (info_ptr
< end_ptr
)
7247 struct dwarf2_per_cu_data per_cu
;
7249 memset (&per_cu
, 0, sizeof (per_cu
));
7250 per_cu
.objfile
= objfile
;
7251 per_cu
.is_debug_types
= 0;
7252 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
7253 per_cu
.info_or_types_section
= section
;
7255 init_cutu_and_read_dies_no_follow (&per_cu
,
7256 &dwo_file
->sections
.abbrev
,
7258 create_debug_info_hash_table_reader
,
7259 &create_dwo_info_table_data
);
7261 info_ptr
+= per_cu
.length
;
7267 /* Subroutine of open_dwo_file to simplify it.
7268 Open the file specified by FILE_NAME and hand it off to BFD for
7269 preliminary analysis. Return a newly initialized bfd *, which
7270 includes a canonicalized copy of FILE_NAME.
7271 In case of trouble, return NULL.
7272 NOTE: This function is derived from symfile_bfd_open. */
7275 try_open_dwo_file (const char *file_name
)
7279 char *absolute_name
;
7281 desc
= openp (debug_file_directory
, OPF_TRY_CWD_FIRST
, file_name
,
7282 O_RDONLY
| O_BINARY
, &absolute_name
);
7286 sym_bfd
= bfd_fopen (absolute_name
, gnutarget
, FOPEN_RB
, desc
);
7289 xfree (absolute_name
);
7292 bfd_set_cacheable (sym_bfd
, 1);
7294 if (!bfd_check_format (sym_bfd
, bfd_object
))
7296 bfd_close (sym_bfd
); /* This also closes desc. */
7297 xfree (absolute_name
);
7301 /* bfd_usrdata exists for applications and libbfd must not touch it. */
7302 gdb_assert (bfd_usrdata (sym_bfd
) == NULL
);
7307 /* Try to open DWO file DWO_NAME.
7308 COMP_DIR is the DW_AT_comp_dir attribute.
7309 The result is the bfd handle of the file.
7310 If there is a problem finding or opening the file, return NULL.
7311 Upon success, the canonicalized path of the file is stored in the bfd,
7312 same as symfile_bfd_open. */
7315 open_dwo_file (const char *dwo_name
, const char *comp_dir
)
7319 if (IS_ABSOLUTE_PATH (dwo_name
))
7320 return try_open_dwo_file (dwo_name
);
7322 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
7324 if (comp_dir
!= NULL
)
7326 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, dwo_name
, NULL
);
7328 /* NOTE: If comp_dir is a relative path, this will also try the
7329 search path, which seems useful. */
7330 abfd
= try_open_dwo_file (path_to_try
);
7331 xfree (path_to_try
);
7336 /* That didn't work, try debug-file-directory, which, despite its name,
7337 is a list of paths. */
7339 if (*debug_file_directory
== '\0')
7342 return try_open_dwo_file (dwo_name
);
7345 /* Initialize the use of the DWO file specified by DWO_NAME. */
7347 static struct dwo_file
*
7348 init_dwo_file (const char *dwo_name
, const char *comp_dir
)
7350 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7351 struct dwo_file
*dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7354 struct cleanup
*cleanups
;
7356 if (dwarf2_read_debug
)
7357 fprintf_unfiltered (gdb_stdlog
, "Reading DWO file %s:\n", dwo_name
);
7359 abfd
= open_dwo_file (dwo_name
, comp_dir
);
7362 dwo_file
->dwo_name
= dwo_name
;
7363 dwo_file
->dwo_bfd
= abfd
;
7365 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
7367 bfd_map_over_sections (abfd
, dwarf2_locate_dwo_sections
, dwo_file
);
7369 dwo_file
->cus
= create_debug_info_hash_table (dwo_file
);
7371 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
7372 dwo_file
->sections
.types
);
7374 discard_cleanups (cleanups
);
7379 /* Lookup DWO file DWO_NAME. */
7381 static struct dwo_file
*
7382 lookup_dwo_file (char *dwo_name
, const char *comp_dir
)
7384 struct dwo_file
*dwo_file
;
7385 struct dwo_file find_entry
;
7388 if (dwarf2_per_objfile
->dwo_files
== NULL
)
7389 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
7391 /* Have we already seen this DWO file? */
7392 find_entry
.dwo_name
= dwo_name
;
7393 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
7395 /* If not, read it in and build a table of the DWOs it contains. */
7397 *slot
= init_dwo_file (dwo_name
, comp_dir
);
7399 /* NOTE: This will be NULL if unable to open the file. */
7405 /* Lookup the DWO CU referenced from THIS_CU in DWO file DWO_NAME.
7406 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
7407 SIGNATURE is the "dwo_id" of the CU (for consistency we use the same
7408 nomenclature as TUs).
7409 The result is a pointer to the dwo_unit object or NULL if we didn't find it
7410 (dwo_id mismatch or couldn't find the DWO file). */
7412 static struct dwo_unit
*
7413 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7414 char *dwo_name
, const char *comp_dir
,
7417 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7418 struct dwo_file
*dwo_file
;
7420 dwo_file
= lookup_dwo_file (dwo_name
, comp_dir
);
7421 if (dwo_file
== NULL
)
7424 /* Look up the DWO using its signature(dwo_id). */
7426 if (dwo_file
->cus
!= NULL
)
7428 struct dwo_unit find_dwo_cu
, *dwo_cu
;
7430 find_dwo_cu
.signature
= signature
;
7431 dwo_cu
= htab_find (dwo_file
->cus
, &find_dwo_cu
);
7437 /* We didn't find it. This must mean a dwo_id mismatch. */
7439 complaint (&symfile_complaints
,
7440 _("Could not find DWO CU referenced by CU at offset 0x%x"
7442 this_cu
->offset
.sect_off
, objfile
->name
);
7446 /* Lookup the DWO TU referenced from THIS_TU in DWO file DWO_NAME.
7447 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
7448 The result is a pointer to the dwo_unit object or NULL if we didn't find it
7449 (dwo_id mismatch or couldn't find the DWO file). */
7451 static struct dwo_unit
*
7452 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
7453 char *dwo_name
, const char *comp_dir
)
7455 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7456 struct dwo_file
*dwo_file
;
7458 dwo_file
= lookup_dwo_file (dwo_name
, comp_dir
);
7459 if (dwo_file
== NULL
)
7462 /* Look up the DWO using its signature(dwo_id). */
7464 if (dwo_file
->tus
!= NULL
)
7466 struct dwo_unit find_dwo_tu
, *dwo_tu
;
7468 find_dwo_tu
.signature
= this_tu
->signature
;
7469 dwo_tu
= htab_find (dwo_file
->tus
, &find_dwo_tu
);
7475 /* We didn't find it. This must mean a dwo_id mismatch. */
7477 complaint (&symfile_complaints
,
7478 _("Could not find DWO TU referenced by TU at offset 0x%x"
7480 this_tu
->per_cu
.offset
.sect_off
, objfile
->name
);
7484 /* Free all resources associated with DWO_FILE.
7485 Close the DWO file and munmap the sections.
7486 All memory should be on the objfile obstack. */
7489 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
7492 struct dwarf2_section_info
*section
;
7494 gdb_assert (dwo_file
->dwo_bfd
!= objfile
->obfd
);
7495 bfd_close (dwo_file
->dwo_bfd
);
7497 munmap_section_buffer (&dwo_file
->sections
.abbrev
);
7498 munmap_section_buffer (&dwo_file
->sections
.info
);
7499 munmap_section_buffer (&dwo_file
->sections
.line
);
7500 munmap_section_buffer (&dwo_file
->sections
.loc
);
7501 munmap_section_buffer (&dwo_file
->sections
.str
);
7502 munmap_section_buffer (&dwo_file
->sections
.str_offsets
);
7505 VEC_iterate (dwarf2_section_info_def
, dwo_file
->sections
.types
,
7508 munmap_section_buffer (section
);
7510 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
7513 /* Wrapper for free_dwo_file for use in cleanups. */
7516 free_dwo_file_cleanup (void *arg
)
7518 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
7519 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7521 free_dwo_file (dwo_file
, objfile
);
7524 /* Traversal function for free_dwo_files. */
7527 free_dwo_file_from_slot (void **slot
, void *info
)
7529 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
7530 struct objfile
*objfile
= (struct objfile
*) info
;
7532 free_dwo_file (dwo_file
, objfile
);
7537 /* Free all resources associated with DWO_FILES. */
7540 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
7542 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
7545 /* Read in various DIEs. */
7547 /* qsort helper for inherit_abstract_dies. */
7550 unsigned_int_compar (const void *ap
, const void *bp
)
7552 unsigned int a
= *(unsigned int *) ap
;
7553 unsigned int b
= *(unsigned int *) bp
;
7555 return (a
> b
) - (b
> a
);
7558 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
7559 Inherit only the children of the DW_AT_abstract_origin DIE not being
7560 already referenced by DW_AT_abstract_origin from the children of the
7564 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
7566 struct die_info
*child_die
;
7567 unsigned die_children_count
;
7568 /* CU offsets which were referenced by children of the current DIE. */
7569 sect_offset
*offsets
;
7570 sect_offset
*offsets_end
, *offsetp
;
7571 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
7572 struct die_info
*origin_die
;
7573 /* Iterator of the ORIGIN_DIE children. */
7574 struct die_info
*origin_child_die
;
7575 struct cleanup
*cleanups
;
7576 struct attribute
*attr
;
7577 struct dwarf2_cu
*origin_cu
;
7578 struct pending
**origin_previous_list_in_scope
;
7580 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
7584 /* Note that following die references may follow to a die in a
7588 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
7590 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
7592 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
7593 origin_cu
->list_in_scope
= cu
->list_in_scope
;
7595 if (die
->tag
!= origin_die
->tag
7596 && !(die
->tag
== DW_TAG_inlined_subroutine
7597 && origin_die
->tag
== DW_TAG_subprogram
))
7598 complaint (&symfile_complaints
,
7599 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
7600 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
7602 child_die
= die
->child
;
7603 die_children_count
= 0;
7604 while (child_die
&& child_die
->tag
)
7606 child_die
= sibling_die (child_die
);
7607 die_children_count
++;
7609 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
7610 cleanups
= make_cleanup (xfree
, offsets
);
7612 offsets_end
= offsets
;
7613 child_die
= die
->child
;
7614 while (child_die
&& child_die
->tag
)
7616 /* For each CHILD_DIE, find the corresponding child of
7617 ORIGIN_DIE. If there is more than one layer of
7618 DW_AT_abstract_origin, follow them all; there shouldn't be,
7619 but GCC versions at least through 4.4 generate this (GCC PR
7621 struct die_info
*child_origin_die
= child_die
;
7622 struct dwarf2_cu
*child_origin_cu
= cu
;
7626 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
7630 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
7634 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
7635 counterpart may exist. */
7636 if (child_origin_die
!= child_die
)
7638 if (child_die
->tag
!= child_origin_die
->tag
7639 && !(child_die
->tag
== DW_TAG_inlined_subroutine
7640 && child_origin_die
->tag
== DW_TAG_subprogram
))
7641 complaint (&symfile_complaints
,
7642 _("Child DIE 0x%x and its abstract origin 0x%x have "
7643 "different tags"), child_die
->offset
.sect_off
,
7644 child_origin_die
->offset
.sect_off
);
7645 if (child_origin_die
->parent
!= origin_die
)
7646 complaint (&symfile_complaints
,
7647 _("Child DIE 0x%x and its abstract origin 0x%x have "
7648 "different parents"), child_die
->offset
.sect_off
,
7649 child_origin_die
->offset
.sect_off
);
7651 *offsets_end
++ = child_origin_die
->offset
;
7653 child_die
= sibling_die (child_die
);
7655 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
7656 unsigned_int_compar
);
7657 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
7658 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
7659 complaint (&symfile_complaints
,
7660 _("Multiple children of DIE 0x%x refer "
7661 "to DIE 0x%x as their abstract origin"),
7662 die
->offset
.sect_off
, offsetp
->sect_off
);
7665 origin_child_die
= origin_die
->child
;
7666 while (origin_child_die
&& origin_child_die
->tag
)
7668 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
7669 while (offsetp
< offsets_end
7670 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
7672 if (offsetp
>= offsets_end
7673 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
7675 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
7676 process_die (origin_child_die
, origin_cu
);
7678 origin_child_die
= sibling_die (origin_child_die
);
7680 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
7682 do_cleanups (cleanups
);
7686 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7688 struct objfile
*objfile
= cu
->objfile
;
7689 struct context_stack
*new;
7692 struct die_info
*child_die
;
7693 struct attribute
*attr
, *call_line
, *call_file
;
7696 struct block
*block
;
7697 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
7698 VEC (symbolp
) *template_args
= NULL
;
7699 struct template_symbol
*templ_func
= NULL
;
7703 /* If we do not have call site information, we can't show the
7704 caller of this inlined function. That's too confusing, so
7705 only use the scope for local variables. */
7706 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
7707 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
7708 if (call_line
== NULL
|| call_file
== NULL
)
7710 read_lexical_block_scope (die
, cu
);
7715 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7717 name
= dwarf2_name (die
, cu
);
7719 /* Ignore functions with missing or empty names. These are actually
7720 illegal according to the DWARF standard. */
7723 complaint (&symfile_complaints
,
7724 _("missing name for subprogram DIE at %d"),
7725 die
->offset
.sect_off
);
7729 /* Ignore functions with missing or invalid low and high pc attributes. */
7730 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
7732 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
7733 if (!attr
|| !DW_UNSND (attr
))
7734 complaint (&symfile_complaints
,
7735 _("cannot get low and high bounds "
7736 "for subprogram DIE at %d"),
7737 die
->offset
.sect_off
);
7744 /* If we have any template arguments, then we must allocate a
7745 different sort of symbol. */
7746 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
7748 if (child_die
->tag
== DW_TAG_template_type_param
7749 || child_die
->tag
== DW_TAG_template_value_param
)
7751 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7752 struct template_symbol
);
7753 templ_func
->base
.is_cplus_template_function
= 1;
7758 new = push_context (0, lowpc
);
7759 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
7760 (struct symbol
*) templ_func
);
7762 /* If there is a location expression for DW_AT_frame_base, record
7764 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
7766 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
7767 expression is being recorded directly in the function's symbol
7768 and not in a separate frame-base object. I guess this hack is
7769 to avoid adding some sort of frame-base adjunct/annex to the
7770 function's symbol :-(. The problem with doing this is that it
7771 results in a function symbol with a location expression that
7772 has nothing to do with the location of the function, ouch! The
7773 relationship should be: a function's symbol has-a frame base; a
7774 frame-base has-a location expression. */
7775 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
7777 cu
->list_in_scope
= &local_symbols
;
7779 if (die
->child
!= NULL
)
7781 child_die
= die
->child
;
7782 while (child_die
&& child_die
->tag
)
7784 if (child_die
->tag
== DW_TAG_template_type_param
7785 || child_die
->tag
== DW_TAG_template_value_param
)
7787 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
7790 VEC_safe_push (symbolp
, template_args
, arg
);
7793 process_die (child_die
, cu
);
7794 child_die
= sibling_die (child_die
);
7798 inherit_abstract_dies (die
, cu
);
7800 /* If we have a DW_AT_specification, we might need to import using
7801 directives from the context of the specification DIE. See the
7802 comment in determine_prefix. */
7803 if (cu
->language
== language_cplus
7804 && dwarf2_attr (die
, DW_AT_specification
, cu
))
7806 struct dwarf2_cu
*spec_cu
= cu
;
7807 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
7811 child_die
= spec_die
->child
;
7812 while (child_die
&& child_die
->tag
)
7814 if (child_die
->tag
== DW_TAG_imported_module
)
7815 process_die (child_die
, spec_cu
);
7816 child_die
= sibling_die (child_die
);
7819 /* In some cases, GCC generates specification DIEs that
7820 themselves contain DW_AT_specification attributes. */
7821 spec_die
= die_specification (spec_die
, &spec_cu
);
7825 new = pop_context ();
7826 /* Make a block for the local symbols within. */
7827 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
7828 lowpc
, highpc
, objfile
);
7830 /* For C++, set the block's scope. */
7831 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
7832 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
7833 determine_prefix (die
, cu
),
7834 processing_has_namespace_info
);
7836 /* If we have address ranges, record them. */
7837 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
7839 /* Attach template arguments to function. */
7840 if (! VEC_empty (symbolp
, template_args
))
7842 gdb_assert (templ_func
!= NULL
);
7844 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
7845 templ_func
->template_arguments
7846 = obstack_alloc (&objfile
->objfile_obstack
,
7847 (templ_func
->n_template_arguments
7848 * sizeof (struct symbol
*)));
7849 memcpy (templ_func
->template_arguments
,
7850 VEC_address (symbolp
, template_args
),
7851 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
7852 VEC_free (symbolp
, template_args
);
7855 /* In C++, we can have functions nested inside functions (e.g., when
7856 a function declares a class that has methods). This means that
7857 when we finish processing a function scope, we may need to go
7858 back to building a containing block's symbol lists. */
7859 local_symbols
= new->locals
;
7860 param_symbols
= new->params
;
7861 using_directives
= new->using_directives
;
7863 /* If we've finished processing a top-level function, subsequent
7864 symbols go in the file symbol list. */
7865 if (outermost_context_p ())
7866 cu
->list_in_scope
= &file_symbols
;
7869 /* Process all the DIES contained within a lexical block scope. Start
7870 a new scope, process the dies, and then close the scope. */
7873 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7875 struct objfile
*objfile
= cu
->objfile
;
7876 struct context_stack
*new;
7877 CORE_ADDR lowpc
, highpc
;
7878 struct die_info
*child_die
;
7881 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7883 /* Ignore blocks with missing or invalid low and high pc attributes. */
7884 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
7885 as multiple lexical blocks? Handling children in a sane way would
7886 be nasty. Might be easier to properly extend generic blocks to
7888 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
7893 push_context (0, lowpc
);
7894 if (die
->child
!= NULL
)
7896 child_die
= die
->child
;
7897 while (child_die
&& child_die
->tag
)
7899 process_die (child_die
, cu
);
7900 child_die
= sibling_die (child_die
);
7903 new = pop_context ();
7905 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
7908 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
7911 /* Note that recording ranges after traversing children, as we
7912 do here, means that recording a parent's ranges entails
7913 walking across all its children's ranges as they appear in
7914 the address map, which is quadratic behavior.
7916 It would be nicer to record the parent's ranges before
7917 traversing its children, simply overriding whatever you find
7918 there. But since we don't even decide whether to create a
7919 block until after we've traversed its children, that's hard
7921 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
7923 local_symbols
= new->locals
;
7924 using_directives
= new->using_directives
;
7927 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
7930 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7932 struct objfile
*objfile
= cu
->objfile
;
7933 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7934 CORE_ADDR pc
, baseaddr
;
7935 struct attribute
*attr
;
7936 struct call_site
*call_site
, call_site_local
;
7939 struct die_info
*child_die
;
7941 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7943 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
7946 complaint (&symfile_complaints
,
7947 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
7948 "DIE 0x%x [in module %s]"),
7949 die
->offset
.sect_off
, objfile
->name
);
7952 pc
= DW_ADDR (attr
) + baseaddr
;
7954 if (cu
->call_site_htab
== NULL
)
7955 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
7956 NULL
, &objfile
->objfile_obstack
,
7957 hashtab_obstack_allocate
, NULL
);
7958 call_site_local
.pc
= pc
;
7959 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
7962 complaint (&symfile_complaints
,
7963 _("Duplicate PC %s for DW_TAG_GNU_call_site "
7964 "DIE 0x%x [in module %s]"),
7965 paddress (gdbarch
, pc
), die
->offset
.sect_off
, objfile
->name
);
7969 /* Count parameters at the caller. */
7972 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
7973 child_die
= sibling_die (child_die
))
7975 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
7977 complaint (&symfile_complaints
,
7978 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
7979 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
7980 child_die
->tag
, child_die
->offset
.sect_off
, objfile
->name
);
7987 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
7988 (sizeof (*call_site
)
7989 + (sizeof (*call_site
->parameter
)
7992 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
7995 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
7997 struct die_info
*func_die
;
7999 /* Skip also over DW_TAG_inlined_subroutine. */
8000 for (func_die
= die
->parent
;
8001 func_die
&& func_die
->tag
!= DW_TAG_subprogram
8002 && func_die
->tag
!= DW_TAG_subroutine_type
;
8003 func_die
= func_die
->parent
);
8005 /* DW_AT_GNU_all_call_sites is a superset
8006 of DW_AT_GNU_all_tail_call_sites. */
8008 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
8009 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
8011 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
8012 not complete. But keep CALL_SITE for look ups via call_site_htab,
8013 both the initial caller containing the real return address PC and
8014 the final callee containing the current PC of a chain of tail
8015 calls do not need to have the tail call list complete. But any
8016 function candidate for a virtual tail call frame searched via
8017 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
8018 determined unambiguously. */
8022 struct type
*func_type
= NULL
;
8025 func_type
= get_die_type (func_die
, cu
);
8026 if (func_type
!= NULL
)
8028 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
8030 /* Enlist this call site to the function. */
8031 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
8032 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
8035 complaint (&symfile_complaints
,
8036 _("Cannot find function owning DW_TAG_GNU_call_site "
8037 "DIE 0x%x [in module %s]"),
8038 die
->offset
.sect_off
, objfile
->name
);
8042 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
8044 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
8045 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
8046 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
8047 /* Keep NULL DWARF_BLOCK. */;
8048 else if (attr_form_is_block (attr
))
8050 struct dwarf2_locexpr_baton
*dlbaton
;
8052 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
8053 dlbaton
->data
= DW_BLOCK (attr
)->data
;
8054 dlbaton
->size
= DW_BLOCK (attr
)->size
;
8055 dlbaton
->per_cu
= cu
->per_cu
;
8057 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
8059 else if (is_ref_attr (attr
))
8061 struct dwarf2_cu
*target_cu
= cu
;
8062 struct die_info
*target_die
;
8064 target_die
= follow_die_ref_or_sig (die
, attr
, &target_cu
);
8065 gdb_assert (target_cu
->objfile
== objfile
);
8066 if (die_is_declaration (target_die
, target_cu
))
8068 const char *target_physname
;
8070 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
8071 if (target_physname
== NULL
)
8072 complaint (&symfile_complaints
,
8073 _("DW_AT_GNU_call_site_target target DIE has invalid "
8074 "physname, for referencing DIE 0x%x [in module %s]"),
8075 die
->offset
.sect_off
, objfile
->name
);
8077 SET_FIELD_PHYSNAME (call_site
->target
, (char *) target_physname
);
8083 /* DW_AT_entry_pc should be preferred. */
8084 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
8085 complaint (&symfile_complaints
,
8086 _("DW_AT_GNU_call_site_target target DIE has invalid "
8087 "low pc, for referencing DIE 0x%x [in module %s]"),
8088 die
->offset
.sect_off
, objfile
->name
);
8090 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
+ baseaddr
);
8094 complaint (&symfile_complaints
,
8095 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
8096 "block nor reference, for DIE 0x%x [in module %s]"),
8097 die
->offset
.sect_off
, objfile
->name
);
8099 call_site
->per_cu
= cu
->per_cu
;
8101 for (child_die
= die
->child
;
8102 child_die
&& child_die
->tag
;
8103 child_die
= sibling_die (child_die
))
8105 struct call_site_parameter
*parameter
;
8106 struct attribute
*loc
, *origin
;
8108 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
8110 /* Already printed the complaint above. */
8114 gdb_assert (call_site
->parameter_count
< nparams
);
8115 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
8117 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
8118 specifies DW_TAG_formal_parameter. Value of the data assumed for the
8119 register is contained in DW_AT_GNU_call_site_value. */
8121 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
8122 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
8123 if (loc
== NULL
&& origin
!= NULL
&& is_ref_attr (origin
))
8127 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
8128 offset
= dwarf2_get_ref_die_offset (origin
);
8129 gdb_assert (offset
.sect_off
>= cu
->header
.offset
.sect_off
);
8130 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
8131 - cu
->header
.offset
.sect_off
);
8133 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
8135 complaint (&symfile_complaints
,
8136 _("No DW_FORM_block* DW_AT_location for "
8137 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
8138 child_die
->offset
.sect_off
, objfile
->name
);
8143 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
8144 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
8145 if (parameter
->u
.dwarf_reg
!= -1)
8146 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
8147 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
8148 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
8149 ¶meter
->u
.fb_offset
))
8150 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
8153 complaint (&symfile_complaints
,
8154 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
8155 "for DW_FORM_block* DW_AT_location is supported for "
8156 "DW_TAG_GNU_call_site child DIE 0x%x "
8158 child_die
->offset
.sect_off
, objfile
->name
);
8163 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
8164 if (!attr_form_is_block (attr
))
8166 complaint (&symfile_complaints
,
8167 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
8168 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
8169 child_die
->offset
.sect_off
, objfile
->name
);
8172 parameter
->value
= DW_BLOCK (attr
)->data
;
8173 parameter
->value_size
= DW_BLOCK (attr
)->size
;
8175 /* Parameters are not pre-cleared by memset above. */
8176 parameter
->data_value
= NULL
;
8177 parameter
->data_value_size
= 0;
8178 call_site
->parameter_count
++;
8180 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
8183 if (!attr_form_is_block (attr
))
8184 complaint (&symfile_complaints
,
8185 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
8186 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
8187 child_die
->offset
.sect_off
, objfile
->name
);
8190 parameter
->data_value
= DW_BLOCK (attr
)->data
;
8191 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
8197 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
8198 Return 1 if the attributes are present and valid, otherwise, return 0.
8199 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
8202 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
8203 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
8204 struct partial_symtab
*ranges_pst
)
8206 struct objfile
*objfile
= cu
->objfile
;
8207 struct comp_unit_head
*cu_header
= &cu
->header
;
8208 bfd
*obfd
= objfile
->obfd
;
8209 unsigned int addr_size
= cu_header
->addr_size
;
8210 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
8211 /* Base address selection entry. */
8222 found_base
= cu
->base_known
;
8223 base
= cu
->base_address
;
8225 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
8226 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
8228 complaint (&symfile_complaints
,
8229 _("Offset %d out of bounds for DW_AT_ranges attribute"),
8233 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
8235 /* Read in the largest possible address. */
8236 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
8237 if ((marker
& mask
) == mask
)
8239 /* If we found the largest possible address, then
8240 read the base address. */
8241 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
8242 buffer
+= 2 * addr_size
;
8243 offset
+= 2 * addr_size
;
8249 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8253 CORE_ADDR range_beginning
, range_end
;
8255 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
8256 buffer
+= addr_size
;
8257 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
8258 buffer
+= addr_size
;
8259 offset
+= 2 * addr_size
;
8261 /* An end of list marker is a pair of zero addresses. */
8262 if (range_beginning
== 0 && range_end
== 0)
8263 /* Found the end of list entry. */
8266 /* Each base address selection entry is a pair of 2 values.
8267 The first is the largest possible address, the second is
8268 the base address. Check for a base address here. */
8269 if ((range_beginning
& mask
) == mask
)
8271 /* If we found the largest possible address, then
8272 read the base address. */
8273 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
8280 /* We have no valid base address for the ranges
8282 complaint (&symfile_complaints
,
8283 _("Invalid .debug_ranges data (no base address)"));
8287 if (range_beginning
> range_end
)
8289 /* Inverted range entries are invalid. */
8290 complaint (&symfile_complaints
,
8291 _("Invalid .debug_ranges data (inverted range)"));
8295 /* Empty range entries have no effect. */
8296 if (range_beginning
== range_end
)
8299 range_beginning
+= base
;
8302 if (ranges_pst
!= NULL
)
8303 addrmap_set_empty (objfile
->psymtabs_addrmap
,
8304 range_beginning
+ baseaddr
,
8305 range_end
- 1 + baseaddr
,
8308 /* FIXME: This is recording everything as a low-high
8309 segment of consecutive addresses. We should have a
8310 data structure for discontiguous block ranges
8314 low
= range_beginning
;
8320 if (range_beginning
< low
)
8321 low
= range_beginning
;
8322 if (range_end
> high
)
8328 /* If the first entry is an end-of-list marker, the range
8329 describes an empty scope, i.e. no instructions. */
8335 *high_return
= high
;
8339 /* Get low and high pc attributes from a die. Return 1 if the attributes
8340 are present and valid, otherwise, return 0. Return -1 if the range is
8341 discontinuous, i.e. derived from DW_AT_ranges information. */
8344 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
8345 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
8346 struct partial_symtab
*pst
)
8348 struct attribute
*attr
;
8349 struct attribute
*attr_high
;
8354 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
8357 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8360 low
= DW_ADDR (attr
);
8361 if (attr_high
->form
== DW_FORM_addr
8362 || attr_high
->form
== DW_FORM_GNU_addr_index
)
8363 high
= DW_ADDR (attr_high
);
8365 high
= low
+ DW_UNSND (attr_high
);
8368 /* Found high w/o low attribute. */
8371 /* Found consecutive range of addresses. */
8376 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
8379 unsigned int ranges_offset
= DW_UNSND (attr
) + cu
->ranges_base
;
8381 /* Value of the DW_AT_ranges attribute is the offset in the
8382 .debug_ranges section. */
8383 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
8385 /* Found discontinuous range of addresses. */
8390 /* read_partial_die has also the strict LOW < HIGH requirement. */
8394 /* When using the GNU linker, .gnu.linkonce. sections are used to
8395 eliminate duplicate copies of functions and vtables and such.
8396 The linker will arbitrarily choose one and discard the others.
8397 The AT_*_pc values for such functions refer to local labels in
8398 these sections. If the section from that file was discarded, the
8399 labels are not in the output, so the relocs get a value of 0.
8400 If this is a discarded function, mark the pc bounds as invalid,
8401 so that GDB will ignore it. */
8402 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
8411 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
8412 its low and high PC addresses. Do nothing if these addresses could not
8413 be determined. Otherwise, set LOWPC to the low address if it is smaller,
8414 and HIGHPC to the high address if greater than HIGHPC. */
8417 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
8418 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8419 struct dwarf2_cu
*cu
)
8421 CORE_ADDR low
, high
;
8422 struct die_info
*child
= die
->child
;
8424 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
8426 *lowpc
= min (*lowpc
, low
);
8427 *highpc
= max (*highpc
, high
);
8430 /* If the language does not allow nested subprograms (either inside
8431 subprograms or lexical blocks), we're done. */
8432 if (cu
->language
!= language_ada
)
8435 /* Check all the children of the given DIE. If it contains nested
8436 subprograms, then check their pc bounds. Likewise, we need to
8437 check lexical blocks as well, as they may also contain subprogram
8439 while (child
&& child
->tag
)
8441 if (child
->tag
== DW_TAG_subprogram
8442 || child
->tag
== DW_TAG_lexical_block
)
8443 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
8444 child
= sibling_die (child
);
8448 /* Get the low and high pc's represented by the scope DIE, and store
8449 them in *LOWPC and *HIGHPC. If the correct values can't be
8450 determined, set *LOWPC to -1 and *HIGHPC to 0. */
8453 get_scope_pc_bounds (struct die_info
*die
,
8454 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8455 struct dwarf2_cu
*cu
)
8457 CORE_ADDR best_low
= (CORE_ADDR
) -1;
8458 CORE_ADDR best_high
= (CORE_ADDR
) 0;
8459 CORE_ADDR current_low
, current_high
;
8461 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
8463 best_low
= current_low
;
8464 best_high
= current_high
;
8468 struct die_info
*child
= die
->child
;
8470 while (child
&& child
->tag
)
8472 switch (child
->tag
) {
8473 case DW_TAG_subprogram
:
8474 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
8476 case DW_TAG_namespace
:
8478 /* FIXME: carlton/2004-01-16: Should we do this for
8479 DW_TAG_class_type/DW_TAG_structure_type, too? I think
8480 that current GCC's always emit the DIEs corresponding
8481 to definitions of methods of classes as children of a
8482 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
8483 the DIEs giving the declarations, which could be
8484 anywhere). But I don't see any reason why the
8485 standards says that they have to be there. */
8486 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
8488 if (current_low
!= ((CORE_ADDR
) -1))
8490 best_low
= min (best_low
, current_low
);
8491 best_high
= max (best_high
, current_high
);
8499 child
= sibling_die (child
);
8504 *highpc
= best_high
;
8507 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
8511 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
8512 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
8514 struct objfile
*objfile
= cu
->objfile
;
8515 struct attribute
*attr
;
8516 struct attribute
*attr_high
;
8518 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
8521 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8524 CORE_ADDR low
= DW_ADDR (attr
);
8526 if (attr_high
->form
== DW_FORM_addr
8527 || attr_high
->form
== DW_FORM_GNU_addr_index
)
8528 high
= DW_ADDR (attr_high
);
8530 high
= low
+ DW_UNSND (attr_high
);
8532 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
8536 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
8539 bfd
*obfd
= objfile
->obfd
;
8541 /* The value of the DW_AT_ranges attribute is the offset of the
8542 address range list in the .debug_ranges section. */
8543 unsigned long offset
= DW_UNSND (attr
) + cu
->ranges_base
;
8544 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
8546 /* For some target architectures, but not others, the
8547 read_address function sign-extends the addresses it returns.
8548 To recognize base address selection entries, we need a
8550 unsigned int addr_size
= cu
->header
.addr_size
;
8551 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
8553 /* The base address, to which the next pair is relative. Note
8554 that this 'base' is a DWARF concept: most entries in a range
8555 list are relative, to reduce the number of relocs against the
8556 debugging information. This is separate from this function's
8557 'baseaddr' argument, which GDB uses to relocate debugging
8558 information from a shared library based on the address at
8559 which the library was loaded. */
8560 CORE_ADDR base
= cu
->base_address
;
8561 int base_known
= cu
->base_known
;
8563 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
8564 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
8566 complaint (&symfile_complaints
,
8567 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
8574 unsigned int bytes_read
;
8575 CORE_ADDR start
, end
;
8577 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
8578 buffer
+= bytes_read
;
8579 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
8580 buffer
+= bytes_read
;
8582 /* Did we find the end of the range list? */
8583 if (start
== 0 && end
== 0)
8586 /* Did we find a base address selection entry? */
8587 else if ((start
& base_select_mask
) == base_select_mask
)
8593 /* We found an ordinary address range. */
8598 complaint (&symfile_complaints
,
8599 _("Invalid .debug_ranges data "
8600 "(no base address)"));
8606 /* Inverted range entries are invalid. */
8607 complaint (&symfile_complaints
,
8608 _("Invalid .debug_ranges data "
8609 "(inverted range)"));
8613 /* Empty range entries have no effect. */
8617 record_block_range (block
,
8618 baseaddr
+ base
+ start
,
8619 baseaddr
+ base
+ end
- 1);
8625 /* Check whether the producer field indicates either of GCC < 4.6, or the
8626 Intel C/C++ compiler, and cache the result in CU. */
8629 check_producer (struct dwarf2_cu
*cu
)
8632 int major
, minor
, release
;
8634 if (cu
->producer
== NULL
)
8636 /* For unknown compilers expect their behavior is DWARF version
8639 GCC started to support .debug_types sections by -gdwarf-4 since
8640 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
8641 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
8642 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
8643 interpreted incorrectly by GDB now - GCC PR debug/48229. */
8645 else if (strncmp (cu
->producer
, "GNU ", strlen ("GNU ")) == 0)
8647 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
8649 cs
= &cu
->producer
[strlen ("GNU ")];
8650 while (*cs
&& !isdigit (*cs
))
8652 if (sscanf (cs
, "%d.%d.%d", &major
, &minor
, &release
) != 3)
8654 /* Not recognized as GCC. */
8657 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
8659 else if (strncmp (cu
->producer
, "Intel(R) C", strlen ("Intel(R) C")) == 0)
8660 cu
->producer_is_icc
= 1;
8663 /* For other non-GCC compilers, expect their behavior is DWARF version
8667 cu
->checked_producer
= 1;
8670 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
8671 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
8672 during 4.6.0 experimental. */
8675 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
8677 if (!cu
->checked_producer
)
8678 check_producer (cu
);
8680 return cu
->producer_is_gxx_lt_4_6
;
8683 /* Return the default accessibility type if it is not overriden by
8684 DW_AT_accessibility. */
8686 static enum dwarf_access_attribute
8687 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
8689 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
8691 /* The default DWARF 2 accessibility for members is public, the default
8692 accessibility for inheritance is private. */
8694 if (die
->tag
!= DW_TAG_inheritance
)
8695 return DW_ACCESS_public
;
8697 return DW_ACCESS_private
;
8701 /* DWARF 3+ defines the default accessibility a different way. The same
8702 rules apply now for DW_TAG_inheritance as for the members and it only
8703 depends on the container kind. */
8705 if (die
->parent
->tag
== DW_TAG_class_type
)
8706 return DW_ACCESS_private
;
8708 return DW_ACCESS_public
;
8712 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
8713 offset. If the attribute was not found return 0, otherwise return
8714 1. If it was found but could not properly be handled, set *OFFSET
8718 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
8721 struct attribute
*attr
;
8723 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
8728 /* Note that we do not check for a section offset first here.
8729 This is because DW_AT_data_member_location is new in DWARF 4,
8730 so if we see it, we can assume that a constant form is really
8731 a constant and not a section offset. */
8732 if (attr_form_is_constant (attr
))
8733 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
8734 else if (attr_form_is_section_offset (attr
))
8735 dwarf2_complex_location_expr_complaint ();
8736 else if (attr_form_is_block (attr
))
8737 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
8739 dwarf2_complex_location_expr_complaint ();
8747 /* Add an aggregate field to the field list. */
8750 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
8751 struct dwarf2_cu
*cu
)
8753 struct objfile
*objfile
= cu
->objfile
;
8754 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8755 struct nextfield
*new_field
;
8756 struct attribute
*attr
;
8758 char *fieldname
= "";
8760 /* Allocate a new field list entry and link it in. */
8761 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
8762 make_cleanup (xfree
, new_field
);
8763 memset (new_field
, 0, sizeof (struct nextfield
));
8765 if (die
->tag
== DW_TAG_inheritance
)
8767 new_field
->next
= fip
->baseclasses
;
8768 fip
->baseclasses
= new_field
;
8772 new_field
->next
= fip
->fields
;
8773 fip
->fields
= new_field
;
8777 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
8779 new_field
->accessibility
= DW_UNSND (attr
);
8781 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
8782 if (new_field
->accessibility
!= DW_ACCESS_public
)
8783 fip
->non_public_fields
= 1;
8785 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
8787 new_field
->virtuality
= DW_UNSND (attr
);
8789 new_field
->virtuality
= DW_VIRTUALITY_none
;
8791 fp
= &new_field
->field
;
8793 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
8797 /* Data member other than a C++ static data member. */
8799 /* Get type of field. */
8800 fp
->type
= die_type (die
, cu
);
8802 SET_FIELD_BITPOS (*fp
, 0);
8804 /* Get bit size of field (zero if none). */
8805 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
8808 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
8812 FIELD_BITSIZE (*fp
) = 0;
8815 /* Get bit offset of field. */
8816 if (handle_data_member_location (die
, cu
, &offset
))
8817 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
8818 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
8821 if (gdbarch_bits_big_endian (gdbarch
))
8823 /* For big endian bits, the DW_AT_bit_offset gives the
8824 additional bit offset from the MSB of the containing
8825 anonymous object to the MSB of the field. We don't
8826 have to do anything special since we don't need to
8827 know the size of the anonymous object. */
8828 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
8832 /* For little endian bits, compute the bit offset to the
8833 MSB of the anonymous object, subtract off the number of
8834 bits from the MSB of the field to the MSB of the
8835 object, and then subtract off the number of bits of
8836 the field itself. The result is the bit offset of
8837 the LSB of the field. */
8839 int bit_offset
= DW_UNSND (attr
);
8841 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8844 /* The size of the anonymous object containing
8845 the bit field is explicit, so use the
8846 indicated size (in bytes). */
8847 anonymous_size
= DW_UNSND (attr
);
8851 /* The size of the anonymous object containing
8852 the bit field must be inferred from the type
8853 attribute of the data member containing the
8855 anonymous_size
= TYPE_LENGTH (fp
->type
);
8857 SET_FIELD_BITPOS (*fp
,
8859 + anonymous_size
* bits_per_byte
8860 - bit_offset
- FIELD_BITSIZE (*fp
)));
8864 /* Get name of field. */
8865 fieldname
= dwarf2_name (die
, cu
);
8866 if (fieldname
== NULL
)
8869 /* The name is already allocated along with this objfile, so we don't
8870 need to duplicate it for the type. */
8871 fp
->name
= fieldname
;
8873 /* Change accessibility for artificial fields (e.g. virtual table
8874 pointer or virtual base class pointer) to private. */
8875 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
8877 FIELD_ARTIFICIAL (*fp
) = 1;
8878 new_field
->accessibility
= DW_ACCESS_private
;
8879 fip
->non_public_fields
= 1;
8882 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
8884 /* C++ static member. */
8886 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
8887 is a declaration, but all versions of G++ as of this writing
8888 (so through at least 3.2.1) incorrectly generate
8889 DW_TAG_variable tags. */
8891 const char *physname
;
8893 /* Get name of field. */
8894 fieldname
= dwarf2_name (die
, cu
);
8895 if (fieldname
== NULL
)
8898 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8900 /* Only create a symbol if this is an external value.
8901 new_symbol checks this and puts the value in the global symbol
8902 table, which we want. If it is not external, new_symbol
8903 will try to put the value in cu->list_in_scope which is wrong. */
8904 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
8906 /* A static const member, not much different than an enum as far as
8907 we're concerned, except that we can support more types. */
8908 new_symbol (die
, NULL
, cu
);
8911 /* Get physical name. */
8912 physname
= dwarf2_physname (fieldname
, die
, cu
);
8914 /* The name is already allocated along with this objfile, so we don't
8915 need to duplicate it for the type. */
8916 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
8917 FIELD_TYPE (*fp
) = die_type (die
, cu
);
8918 FIELD_NAME (*fp
) = fieldname
;
8920 else if (die
->tag
== DW_TAG_inheritance
)
8924 /* C++ base class field. */
8925 if (handle_data_member_location (die
, cu
, &offset
))
8926 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
8927 FIELD_BITSIZE (*fp
) = 0;
8928 FIELD_TYPE (*fp
) = die_type (die
, cu
);
8929 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
8930 fip
->nbaseclasses
++;
8934 /* Add a typedef defined in the scope of the FIP's class. */
8937 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
8938 struct dwarf2_cu
*cu
)
8940 struct objfile
*objfile
= cu
->objfile
;
8941 struct typedef_field_list
*new_field
;
8942 struct attribute
*attr
;
8943 struct typedef_field
*fp
;
8944 char *fieldname
= "";
8946 /* Allocate a new field list entry and link it in. */
8947 new_field
= xzalloc (sizeof (*new_field
));
8948 make_cleanup (xfree
, new_field
);
8950 gdb_assert (die
->tag
== DW_TAG_typedef
);
8952 fp
= &new_field
->field
;
8954 /* Get name of field. */
8955 fp
->name
= dwarf2_name (die
, cu
);
8956 if (fp
->name
== NULL
)
8959 fp
->type
= read_type_die (die
, cu
);
8961 new_field
->next
= fip
->typedef_field_list
;
8962 fip
->typedef_field_list
= new_field
;
8963 fip
->typedef_field_list_count
++;
8966 /* Create the vector of fields, and attach it to the type. */
8969 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
8970 struct dwarf2_cu
*cu
)
8972 int nfields
= fip
->nfields
;
8974 /* Record the field count, allocate space for the array of fields,
8975 and create blank accessibility bitfields if necessary. */
8976 TYPE_NFIELDS (type
) = nfields
;
8977 TYPE_FIELDS (type
) = (struct field
*)
8978 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
8979 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
8981 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
8983 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
8985 TYPE_FIELD_PRIVATE_BITS (type
) =
8986 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
8987 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
8989 TYPE_FIELD_PROTECTED_BITS (type
) =
8990 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
8991 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
8993 TYPE_FIELD_IGNORE_BITS (type
) =
8994 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
8995 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
8998 /* If the type has baseclasses, allocate and clear a bit vector for
8999 TYPE_FIELD_VIRTUAL_BITS. */
9000 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
9002 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
9003 unsigned char *pointer
;
9005 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
9006 pointer
= TYPE_ALLOC (type
, num_bytes
);
9007 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
9008 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
9009 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
9012 /* Copy the saved-up fields into the field vector. Start from the head of
9013 the list, adding to the tail of the field array, so that they end up in
9014 the same order in the array in which they were added to the list. */
9015 while (nfields
-- > 0)
9017 struct nextfield
*fieldp
;
9021 fieldp
= fip
->fields
;
9022 fip
->fields
= fieldp
->next
;
9026 fieldp
= fip
->baseclasses
;
9027 fip
->baseclasses
= fieldp
->next
;
9030 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
9031 switch (fieldp
->accessibility
)
9033 case DW_ACCESS_private
:
9034 if (cu
->language
!= language_ada
)
9035 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
9038 case DW_ACCESS_protected
:
9039 if (cu
->language
!= language_ada
)
9040 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
9043 case DW_ACCESS_public
:
9047 /* Unknown accessibility. Complain and treat it as public. */
9049 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
9050 fieldp
->accessibility
);
9054 if (nfields
< fip
->nbaseclasses
)
9056 switch (fieldp
->virtuality
)
9058 case DW_VIRTUALITY_virtual
:
9059 case DW_VIRTUALITY_pure_virtual
:
9060 if (cu
->language
== language_ada
)
9061 error (_("unexpected virtuality in component of Ada type"));
9062 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
9069 /* Add a member function to the proper fieldlist. */
9072 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
9073 struct type
*type
, struct dwarf2_cu
*cu
)
9075 struct objfile
*objfile
= cu
->objfile
;
9076 struct attribute
*attr
;
9077 struct fnfieldlist
*flp
;
9079 struct fn_field
*fnp
;
9081 struct nextfnfield
*new_fnfield
;
9082 struct type
*this_type
;
9083 enum dwarf_access_attribute accessibility
;
9085 if (cu
->language
== language_ada
)
9086 error (_("unexpected member function in Ada type"));
9088 /* Get name of member function. */
9089 fieldname
= dwarf2_name (die
, cu
);
9090 if (fieldname
== NULL
)
9093 /* Look up member function name in fieldlist. */
9094 for (i
= 0; i
< fip
->nfnfields
; i
++)
9096 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
9100 /* Create new list element if necessary. */
9101 if (i
< fip
->nfnfields
)
9102 flp
= &fip
->fnfieldlists
[i
];
9105 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
9107 fip
->fnfieldlists
= (struct fnfieldlist
*)
9108 xrealloc (fip
->fnfieldlists
,
9109 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
9110 * sizeof (struct fnfieldlist
));
9111 if (fip
->nfnfields
== 0)
9112 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
9114 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
9115 flp
->name
= fieldname
;
9118 i
= fip
->nfnfields
++;
9121 /* Create a new member function field and chain it to the field list
9123 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
9124 make_cleanup (xfree
, new_fnfield
);
9125 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
9126 new_fnfield
->next
= flp
->head
;
9127 flp
->head
= new_fnfield
;
9130 /* Fill in the member function field info. */
9131 fnp
= &new_fnfield
->fnfield
;
9133 /* Delay processing of the physname until later. */
9134 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
9136 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
9141 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
9142 fnp
->physname
= physname
? physname
: "";
9145 fnp
->type
= alloc_type (objfile
);
9146 this_type
= read_type_die (die
, cu
);
9147 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
9149 int nparams
= TYPE_NFIELDS (this_type
);
9151 /* TYPE is the domain of this method, and THIS_TYPE is the type
9152 of the method itself (TYPE_CODE_METHOD). */
9153 smash_to_method_type (fnp
->type
, type
,
9154 TYPE_TARGET_TYPE (this_type
),
9155 TYPE_FIELDS (this_type
),
9156 TYPE_NFIELDS (this_type
),
9157 TYPE_VARARGS (this_type
));
9159 /* Handle static member functions.
9160 Dwarf2 has no clean way to discern C++ static and non-static
9161 member functions. G++ helps GDB by marking the first
9162 parameter for non-static member functions (which is the this
9163 pointer) as artificial. We obtain this information from
9164 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
9165 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
9166 fnp
->voffset
= VOFFSET_STATIC
;
9169 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
9170 dwarf2_full_name (fieldname
, die
, cu
));
9172 /* Get fcontext from DW_AT_containing_type if present. */
9173 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
9174 fnp
->fcontext
= die_containing_type (die
, cu
);
9176 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
9177 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
9179 /* Get accessibility. */
9180 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
9182 accessibility
= DW_UNSND (attr
);
9184 accessibility
= dwarf2_default_access_attribute (die
, cu
);
9185 switch (accessibility
)
9187 case DW_ACCESS_private
:
9188 fnp
->is_private
= 1;
9190 case DW_ACCESS_protected
:
9191 fnp
->is_protected
= 1;
9195 /* Check for artificial methods. */
9196 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
9197 if (attr
&& DW_UNSND (attr
) != 0)
9198 fnp
->is_artificial
= 1;
9200 /* Get index in virtual function table if it is a virtual member
9201 function. For older versions of GCC, this is an offset in the
9202 appropriate virtual table, as specified by DW_AT_containing_type.
9203 For everyone else, it is an expression to be evaluated relative
9204 to the object address. */
9206 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
9209 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
9211 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
9213 /* Old-style GCC. */
9214 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
9216 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
9217 || (DW_BLOCK (attr
)->size
> 1
9218 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
9219 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
9221 struct dwarf_block blk
;
9224 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
9226 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
9227 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
9228 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
9229 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
9230 dwarf2_complex_location_expr_complaint ();
9232 fnp
->voffset
/= cu
->header
.addr_size
;
9236 dwarf2_complex_location_expr_complaint ();
9239 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
9241 else if (attr_form_is_section_offset (attr
))
9243 dwarf2_complex_location_expr_complaint ();
9247 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
9253 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
9254 if (attr
&& DW_UNSND (attr
))
9256 /* GCC does this, as of 2008-08-25; PR debug/37237. */
9257 complaint (&symfile_complaints
,
9258 _("Member function \"%s\" (offset %d) is virtual "
9259 "but the vtable offset is not specified"),
9260 fieldname
, die
->offset
.sect_off
);
9261 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
9262 TYPE_CPLUS_DYNAMIC (type
) = 1;
9267 /* Create the vector of member function fields, and attach it to the type. */
9270 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
9271 struct dwarf2_cu
*cu
)
9273 struct fnfieldlist
*flp
;
9276 if (cu
->language
== language_ada
)
9277 error (_("unexpected member functions in Ada type"));
9279 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
9280 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
9281 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
9283 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
9285 struct nextfnfield
*nfp
= flp
->head
;
9286 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
9289 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
9290 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
9291 fn_flp
->fn_fields
= (struct fn_field
*)
9292 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
9293 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
9294 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
9297 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
9300 /* Returns non-zero if NAME is the name of a vtable member in CU's
9301 language, zero otherwise. */
9303 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
9305 static const char vptr
[] = "_vptr";
9306 static const char vtable
[] = "vtable";
9308 /* Look for the C++ and Java forms of the vtable. */
9309 if ((cu
->language
== language_java
9310 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
9311 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
9312 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
9318 /* GCC outputs unnamed structures that are really pointers to member
9319 functions, with the ABI-specified layout. If TYPE describes
9320 such a structure, smash it into a member function type.
9322 GCC shouldn't do this; it should just output pointer to member DIEs.
9323 This is GCC PR debug/28767. */
9326 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
9328 struct type
*pfn_type
, *domain_type
, *new_type
;
9330 /* Check for a structure with no name and two children. */
9331 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
9334 /* Check for __pfn and __delta members. */
9335 if (TYPE_FIELD_NAME (type
, 0) == NULL
9336 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
9337 || TYPE_FIELD_NAME (type
, 1) == NULL
9338 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
9341 /* Find the type of the method. */
9342 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
9343 if (pfn_type
== NULL
9344 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
9345 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
9348 /* Look for the "this" argument. */
9349 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
9350 if (TYPE_NFIELDS (pfn_type
) == 0
9351 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
9352 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
9355 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
9356 new_type
= alloc_type (objfile
);
9357 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
9358 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
9359 TYPE_VARARGS (pfn_type
));
9360 smash_to_methodptr_type (type
, new_type
);
9363 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
9367 producer_is_icc (struct dwarf2_cu
*cu
)
9369 if (!cu
->checked_producer
)
9370 check_producer (cu
);
9372 return cu
->producer_is_icc
;
9375 /* Called when we find the DIE that starts a structure or union scope
9376 (definition) to create a type for the structure or union. Fill in
9377 the type's name and general properties; the members will not be
9378 processed until process_structure_type.
9380 NOTE: we need to call these functions regardless of whether or not the
9381 DIE has a DW_AT_name attribute, since it might be an anonymous
9382 structure or union. This gets the type entered into our set of
9385 However, if the structure is incomplete (an opaque struct/union)
9386 then suppress creating a symbol table entry for it since gdb only
9387 wants to find the one with the complete definition. Note that if
9388 it is complete, we just call new_symbol, which does it's own
9389 checking about whether the struct/union is anonymous or not (and
9390 suppresses creating a symbol table entry itself). */
9392 static struct type
*
9393 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9395 struct objfile
*objfile
= cu
->objfile
;
9397 struct attribute
*attr
;
9400 /* If the definition of this type lives in .debug_types, read that type.
9401 Don't follow DW_AT_specification though, that will take us back up
9402 the chain and we want to go down. */
9403 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
9406 struct dwarf2_cu
*type_cu
= cu
;
9407 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
9409 /* We could just recurse on read_structure_type, but we need to call
9410 get_die_type to ensure only one type for this DIE is created.
9411 This is important, for example, because for c++ classes we need
9412 TYPE_NAME set which is only done by new_symbol. Blech. */
9413 type
= read_type_die (type_die
, type_cu
);
9415 /* TYPE_CU may not be the same as CU.
9416 Ensure TYPE is recorded in CU's type_hash table. */
9417 return set_die_type (die
, type
, cu
);
9420 type
= alloc_type (objfile
);
9421 INIT_CPLUS_SPECIFIC (type
);
9423 name
= dwarf2_name (die
, cu
);
9426 if (cu
->language
== language_cplus
9427 || cu
->language
== language_java
)
9429 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
9431 /* dwarf2_full_name might have already finished building the DIE's
9432 type. If so, there is no need to continue. */
9433 if (get_die_type (die
, cu
) != NULL
)
9434 return get_die_type (die
, cu
);
9436 TYPE_TAG_NAME (type
) = full_name
;
9437 if (die
->tag
== DW_TAG_structure_type
9438 || die
->tag
== DW_TAG_class_type
)
9439 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
9443 /* The name is already allocated along with this objfile, so
9444 we don't need to duplicate it for the type. */
9445 TYPE_TAG_NAME (type
) = (char *) name
;
9446 if (die
->tag
== DW_TAG_class_type
)
9447 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
9451 if (die
->tag
== DW_TAG_structure_type
)
9453 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9455 else if (die
->tag
== DW_TAG_union_type
)
9457 TYPE_CODE (type
) = TYPE_CODE_UNION
;
9461 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
9464 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
9465 TYPE_DECLARED_CLASS (type
) = 1;
9467 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
9470 TYPE_LENGTH (type
) = DW_UNSND (attr
);
9474 TYPE_LENGTH (type
) = 0;
9477 if (producer_is_icc (cu
))
9479 /* ICC does not output the required DW_AT_declaration
9480 on incomplete types, but gives them a size of zero. */
9483 TYPE_STUB_SUPPORTED (type
) = 1;
9485 if (die_is_declaration (die
, cu
))
9486 TYPE_STUB (type
) = 1;
9487 else if (attr
== NULL
&& die
->child
== NULL
9488 && producer_is_realview (cu
->producer
))
9489 /* RealView does not output the required DW_AT_declaration
9490 on incomplete types. */
9491 TYPE_STUB (type
) = 1;
9493 /* We need to add the type field to the die immediately so we don't
9494 infinitely recurse when dealing with pointers to the structure
9495 type within the structure itself. */
9496 set_die_type (die
, type
, cu
);
9498 /* set_die_type should be already done. */
9499 set_descriptive_type (type
, die
, cu
);
9504 /* Finish creating a structure or union type, including filling in
9505 its members and creating a symbol for it. */
9508 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9510 struct objfile
*objfile
= cu
->objfile
;
9511 struct die_info
*child_die
= die
->child
;
9514 type
= get_die_type (die
, cu
);
9516 type
= read_structure_type (die
, cu
);
9518 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
9520 struct field_info fi
;
9521 struct die_info
*child_die
;
9522 VEC (symbolp
) *template_args
= NULL
;
9523 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9525 memset (&fi
, 0, sizeof (struct field_info
));
9527 child_die
= die
->child
;
9529 while (child_die
&& child_die
->tag
)
9531 if (child_die
->tag
== DW_TAG_member
9532 || child_die
->tag
== DW_TAG_variable
)
9534 /* NOTE: carlton/2002-11-05: A C++ static data member
9535 should be a DW_TAG_member that is a declaration, but
9536 all versions of G++ as of this writing (so through at
9537 least 3.2.1) incorrectly generate DW_TAG_variable
9538 tags for them instead. */
9539 dwarf2_add_field (&fi
, child_die
, cu
);
9541 else if (child_die
->tag
== DW_TAG_subprogram
)
9543 /* C++ member function. */
9544 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
9546 else if (child_die
->tag
== DW_TAG_inheritance
)
9548 /* C++ base class field. */
9549 dwarf2_add_field (&fi
, child_die
, cu
);
9551 else if (child_die
->tag
== DW_TAG_typedef
)
9552 dwarf2_add_typedef (&fi
, child_die
, cu
);
9553 else if (child_die
->tag
== DW_TAG_template_type_param
9554 || child_die
->tag
== DW_TAG_template_value_param
)
9556 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
9559 VEC_safe_push (symbolp
, template_args
, arg
);
9562 child_die
= sibling_die (child_die
);
9565 /* Attach template arguments to type. */
9566 if (! VEC_empty (symbolp
, template_args
))
9568 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
9569 TYPE_N_TEMPLATE_ARGUMENTS (type
)
9570 = VEC_length (symbolp
, template_args
);
9571 TYPE_TEMPLATE_ARGUMENTS (type
)
9572 = obstack_alloc (&objfile
->objfile_obstack
,
9573 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
9574 * sizeof (struct symbol
*)));
9575 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
9576 VEC_address (symbolp
, template_args
),
9577 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
9578 * sizeof (struct symbol
*)));
9579 VEC_free (symbolp
, template_args
);
9582 /* Attach fields and member functions to the type. */
9584 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
9587 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
9589 /* Get the type which refers to the base class (possibly this
9590 class itself) which contains the vtable pointer for the current
9591 class from the DW_AT_containing_type attribute. This use of
9592 DW_AT_containing_type is a GNU extension. */
9594 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
9596 struct type
*t
= die_containing_type (die
, cu
);
9598 TYPE_VPTR_BASETYPE (type
) = t
;
9603 /* Our own class provides vtbl ptr. */
9604 for (i
= TYPE_NFIELDS (t
) - 1;
9605 i
>= TYPE_N_BASECLASSES (t
);
9608 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
9610 if (is_vtable_name (fieldname
, cu
))
9612 TYPE_VPTR_FIELDNO (type
) = i
;
9617 /* Complain if virtual function table field not found. */
9618 if (i
< TYPE_N_BASECLASSES (t
))
9619 complaint (&symfile_complaints
,
9620 _("virtual function table pointer "
9621 "not found when defining class '%s'"),
9622 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
9627 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
9630 else if (cu
->producer
9631 && strncmp (cu
->producer
,
9632 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
9634 /* The IBM XLC compiler does not provide direct indication
9635 of the containing type, but the vtable pointer is
9636 always named __vfp. */
9640 for (i
= TYPE_NFIELDS (type
) - 1;
9641 i
>= TYPE_N_BASECLASSES (type
);
9644 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
9646 TYPE_VPTR_FIELDNO (type
) = i
;
9647 TYPE_VPTR_BASETYPE (type
) = type
;
9654 /* Copy fi.typedef_field_list linked list elements content into the
9655 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
9656 if (fi
.typedef_field_list
)
9658 int i
= fi
.typedef_field_list_count
;
9660 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
9661 TYPE_TYPEDEF_FIELD_ARRAY (type
)
9662 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
9663 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
9665 /* Reverse the list order to keep the debug info elements order. */
9668 struct typedef_field
*dest
, *src
;
9670 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
9671 src
= &fi
.typedef_field_list
->field
;
9672 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
9677 do_cleanups (back_to
);
9679 if (HAVE_CPLUS_STRUCT (type
))
9680 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
9683 quirk_gcc_member_function_pointer (type
, objfile
);
9685 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
9686 snapshots) has been known to create a die giving a declaration
9687 for a class that has, as a child, a die giving a definition for a
9688 nested class. So we have to process our children even if the
9689 current die is a declaration. Normally, of course, a declaration
9690 won't have any children at all. */
9692 while (child_die
!= NULL
&& child_die
->tag
)
9694 if (child_die
->tag
== DW_TAG_member
9695 || child_die
->tag
== DW_TAG_variable
9696 || child_die
->tag
== DW_TAG_inheritance
9697 || child_die
->tag
== DW_TAG_template_value_param
9698 || child_die
->tag
== DW_TAG_template_type_param
)
9703 process_die (child_die
, cu
);
9705 child_die
= sibling_die (child_die
);
9708 /* Do not consider external references. According to the DWARF standard,
9709 these DIEs are identified by the fact that they have no byte_size
9710 attribute, and a declaration attribute. */
9711 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
9712 || !die_is_declaration (die
, cu
))
9713 new_symbol (die
, type
, cu
);
9716 /* Given a DW_AT_enumeration_type die, set its type. We do not
9717 complete the type's fields yet, or create any symbols. */
9719 static struct type
*
9720 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9722 struct objfile
*objfile
= cu
->objfile
;
9724 struct attribute
*attr
;
9727 /* If the definition of this type lives in .debug_types, read that type.
9728 Don't follow DW_AT_specification though, that will take us back up
9729 the chain and we want to go down. */
9730 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
9733 struct dwarf2_cu
*type_cu
= cu
;
9734 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
9736 type
= read_type_die (type_die
, type_cu
);
9738 /* TYPE_CU may not be the same as CU.
9739 Ensure TYPE is recorded in CU's type_hash table. */
9740 return set_die_type (die
, type
, cu
);
9743 type
= alloc_type (objfile
);
9745 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
9746 name
= dwarf2_full_name (NULL
, die
, cu
);
9748 TYPE_TAG_NAME (type
) = (char *) name
;
9750 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
9753 TYPE_LENGTH (type
) = DW_UNSND (attr
);
9757 TYPE_LENGTH (type
) = 0;
9760 /* The enumeration DIE can be incomplete. In Ada, any type can be
9761 declared as private in the package spec, and then defined only
9762 inside the package body. Such types are known as Taft Amendment
9763 Types. When another package uses such a type, an incomplete DIE
9764 may be generated by the compiler. */
9765 if (die_is_declaration (die
, cu
))
9766 TYPE_STUB (type
) = 1;
9768 return set_die_type (die
, type
, cu
);
9771 /* Given a pointer to a die which begins an enumeration, process all
9772 the dies that define the members of the enumeration, and create the
9773 symbol for the enumeration type.
9775 NOTE: We reverse the order of the element list. */
9778 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9780 struct type
*this_type
;
9782 this_type
= get_die_type (die
, cu
);
9783 if (this_type
== NULL
)
9784 this_type
= read_enumeration_type (die
, cu
);
9786 if (die
->child
!= NULL
)
9788 struct die_info
*child_die
;
9790 struct field
*fields
= NULL
;
9792 int unsigned_enum
= 1;
9797 child_die
= die
->child
;
9798 while (child_die
&& child_die
->tag
)
9800 if (child_die
->tag
!= DW_TAG_enumerator
)
9802 process_die (child_die
, cu
);
9806 name
= dwarf2_name (child_die
, cu
);
9809 sym
= new_symbol (child_die
, this_type
, cu
);
9810 if (SYMBOL_VALUE (sym
) < 0)
9815 else if ((mask
& SYMBOL_VALUE (sym
)) != 0)
9818 mask
|= SYMBOL_VALUE (sym
);
9820 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
9822 fields
= (struct field
*)
9824 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
9825 * sizeof (struct field
));
9828 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
9829 FIELD_TYPE (fields
[num_fields
]) = NULL
;
9830 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
9831 FIELD_BITSIZE (fields
[num_fields
]) = 0;
9837 child_die
= sibling_die (child_die
);
9842 TYPE_NFIELDS (this_type
) = num_fields
;
9843 TYPE_FIELDS (this_type
) = (struct field
*)
9844 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
9845 memcpy (TYPE_FIELDS (this_type
), fields
,
9846 sizeof (struct field
) * num_fields
);
9850 TYPE_UNSIGNED (this_type
) = 1;
9852 TYPE_FLAG_ENUM (this_type
) = 1;
9855 /* If we are reading an enum from a .debug_types unit, and the enum
9856 is a declaration, and the enum is not the signatured type in the
9857 unit, then we do not want to add a symbol for it. Adding a
9858 symbol would in some cases obscure the true definition of the
9859 enum, giving users an incomplete type when the definition is
9860 actually available. Note that we do not want to do this for all
9861 enums which are just declarations, because C++0x allows forward
9862 enum declarations. */
9863 if (cu
->per_cu
->is_debug_types
9864 && die_is_declaration (die
, cu
))
9866 struct signatured_type
*sig_type
;
9869 = lookup_signatured_type_at_offset (dwarf2_per_objfile
->objfile
,
9870 cu
->per_cu
->info_or_types_section
,
9871 cu
->per_cu
->offset
);
9872 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
9873 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
9877 new_symbol (die
, this_type
, cu
);
9880 /* Extract all information from a DW_TAG_array_type DIE and put it in
9881 the DIE's type field. For now, this only handles one dimensional
9884 static struct type
*
9885 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9887 struct objfile
*objfile
= cu
->objfile
;
9888 struct die_info
*child_die
;
9890 struct type
*element_type
, *range_type
, *index_type
;
9891 struct type
**range_types
= NULL
;
9892 struct attribute
*attr
;
9894 struct cleanup
*back_to
;
9897 element_type
= die_type (die
, cu
);
9899 /* The die_type call above may have already set the type for this DIE. */
9900 type
= get_die_type (die
, cu
);
9904 /* Irix 6.2 native cc creates array types without children for
9905 arrays with unspecified length. */
9906 if (die
->child
== NULL
)
9908 index_type
= objfile_type (objfile
)->builtin_int
;
9909 range_type
= create_range_type (NULL
, index_type
, 0, -1);
9910 type
= create_array_type (NULL
, element_type
, range_type
);
9911 return set_die_type (die
, type
, cu
);
9914 back_to
= make_cleanup (null_cleanup
, NULL
);
9915 child_die
= die
->child
;
9916 while (child_die
&& child_die
->tag
)
9918 if (child_die
->tag
== DW_TAG_subrange_type
)
9920 struct type
*child_type
= read_type_die (child_die
, cu
);
9922 if (child_type
!= NULL
)
9924 /* The range type was succesfully read. Save it for the
9925 array type creation. */
9926 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
9928 range_types
= (struct type
**)
9929 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
9930 * sizeof (struct type
*));
9932 make_cleanup (free_current_contents
, &range_types
);
9934 range_types
[ndim
++] = child_type
;
9937 child_die
= sibling_die (child_die
);
9940 /* Dwarf2 dimensions are output from left to right, create the
9941 necessary array types in backwards order. */
9943 type
= element_type
;
9945 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
9950 type
= create_array_type (NULL
, type
, range_types
[i
++]);
9955 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
9958 /* Understand Dwarf2 support for vector types (like they occur on
9959 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
9960 array type. This is not part of the Dwarf2/3 standard yet, but a
9961 custom vendor extension. The main difference between a regular
9962 array and the vector variant is that vectors are passed by value
9964 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
9966 make_vector_type (type
);
9968 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
9969 implementation may choose to implement triple vectors using this
9971 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
9974 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
9975 TYPE_LENGTH (type
) = DW_UNSND (attr
);
9977 complaint (&symfile_complaints
,
9978 _("DW_AT_byte_size for array type smaller "
9979 "than the total size of elements"));
9982 name
= dwarf2_name (die
, cu
);
9984 TYPE_NAME (type
) = name
;
9986 /* Install the type in the die. */
9987 set_die_type (die
, type
, cu
);
9989 /* set_die_type should be already done. */
9990 set_descriptive_type (type
, die
, cu
);
9992 do_cleanups (back_to
);
9997 static enum dwarf_array_dim_ordering
9998 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
10000 struct attribute
*attr
;
10002 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
10004 if (attr
) return DW_SND (attr
);
10006 /* GNU F77 is a special case, as at 08/2004 array type info is the
10007 opposite order to the dwarf2 specification, but data is still
10008 laid out as per normal fortran.
10010 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
10011 version checking. */
10013 if (cu
->language
== language_fortran
10014 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
10016 return DW_ORD_row_major
;
10019 switch (cu
->language_defn
->la_array_ordering
)
10021 case array_column_major
:
10022 return DW_ORD_col_major
;
10023 case array_row_major
:
10025 return DW_ORD_row_major
;
10029 /* Extract all information from a DW_TAG_set_type DIE and put it in
10030 the DIE's type field. */
10032 static struct type
*
10033 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10035 struct type
*domain_type
, *set_type
;
10036 struct attribute
*attr
;
10038 domain_type
= die_type (die
, cu
);
10040 /* The die_type call above may have already set the type for this DIE. */
10041 set_type
= get_die_type (die
, cu
);
10045 set_type
= create_set_type (NULL
, domain_type
);
10047 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10049 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
10051 return set_die_type (die
, set_type
, cu
);
10054 /* First cut: install each common block member as a global variable. */
10057 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
10059 struct die_info
*child_die
;
10060 struct attribute
*attr
;
10061 struct symbol
*sym
;
10062 CORE_ADDR base
= (CORE_ADDR
) 0;
10064 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10067 /* Support the .debug_loc offsets. */
10068 if (attr_form_is_block (attr
))
10070 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
10072 else if (attr_form_is_section_offset (attr
))
10074 dwarf2_complex_location_expr_complaint ();
10078 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
10079 "common block member");
10082 if (die
->child
!= NULL
)
10084 child_die
= die
->child
;
10085 while (child_die
&& child_die
->tag
)
10089 sym
= new_symbol (child_die
, NULL
, cu
);
10091 && handle_data_member_location (child_die
, cu
, &offset
))
10093 SYMBOL_VALUE_ADDRESS (sym
) = base
+ offset
;
10094 add_symbol_to_list (sym
, &global_symbols
);
10096 child_die
= sibling_die (child_die
);
10101 /* Create a type for a C++ namespace. */
10103 static struct type
*
10104 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10106 struct objfile
*objfile
= cu
->objfile
;
10107 const char *previous_prefix
, *name
;
10111 /* For extensions, reuse the type of the original namespace. */
10112 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
10114 struct die_info
*ext_die
;
10115 struct dwarf2_cu
*ext_cu
= cu
;
10117 ext_die
= dwarf2_extension (die
, &ext_cu
);
10118 type
= read_type_die (ext_die
, ext_cu
);
10120 /* EXT_CU may not be the same as CU.
10121 Ensure TYPE is recorded in CU's type_hash table. */
10122 return set_die_type (die
, type
, cu
);
10125 name
= namespace_name (die
, &is_anonymous
, cu
);
10127 /* Now build the name of the current namespace. */
10129 previous_prefix
= determine_prefix (die
, cu
);
10130 if (previous_prefix
[0] != '\0')
10131 name
= typename_concat (&objfile
->objfile_obstack
,
10132 previous_prefix
, name
, 0, cu
);
10134 /* Create the type. */
10135 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
10137 TYPE_NAME (type
) = (char *) name
;
10138 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
10140 return set_die_type (die
, type
, cu
);
10143 /* Read a C++ namespace. */
10146 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10148 struct objfile
*objfile
= cu
->objfile
;
10151 /* Add a symbol associated to this if we haven't seen the namespace
10152 before. Also, add a using directive if it's an anonymous
10155 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
10159 type
= read_type_die (die
, cu
);
10160 new_symbol (die
, type
, cu
);
10162 namespace_name (die
, &is_anonymous
, cu
);
10165 const char *previous_prefix
= determine_prefix (die
, cu
);
10167 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
10168 NULL
, NULL
, &objfile
->objfile_obstack
);
10172 if (die
->child
!= NULL
)
10174 struct die_info
*child_die
= die
->child
;
10176 while (child_die
&& child_die
->tag
)
10178 process_die (child_die
, cu
);
10179 child_die
= sibling_die (child_die
);
10184 /* Read a Fortran module as type. This DIE can be only a declaration used for
10185 imported module. Still we need that type as local Fortran "use ... only"
10186 declaration imports depend on the created type in determine_prefix. */
10188 static struct type
*
10189 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10191 struct objfile
*objfile
= cu
->objfile
;
10195 module_name
= dwarf2_name (die
, cu
);
10197 complaint (&symfile_complaints
,
10198 _("DW_TAG_module has no name, offset 0x%x"),
10199 die
->offset
.sect_off
);
10200 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
10202 /* determine_prefix uses TYPE_TAG_NAME. */
10203 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
10205 return set_die_type (die
, type
, cu
);
10208 /* Read a Fortran module. */
10211 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
10213 struct die_info
*child_die
= die
->child
;
10215 while (child_die
&& child_die
->tag
)
10217 process_die (child_die
, cu
);
10218 child_die
= sibling_die (child_die
);
10222 /* Return the name of the namespace represented by DIE. Set
10223 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
10226 static const char *
10227 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
10229 struct die_info
*current_die
;
10230 const char *name
= NULL
;
10232 /* Loop through the extensions until we find a name. */
10234 for (current_die
= die
;
10235 current_die
!= NULL
;
10236 current_die
= dwarf2_extension (die
, &cu
))
10238 name
= dwarf2_name (current_die
, cu
);
10243 /* Is it an anonymous namespace? */
10245 *is_anonymous
= (name
== NULL
);
10247 name
= CP_ANONYMOUS_NAMESPACE_STR
;
10252 /* Extract all information from a DW_TAG_pointer_type DIE and add to
10253 the user defined type vector. */
10255 static struct type
*
10256 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10258 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
10259 struct comp_unit_head
*cu_header
= &cu
->header
;
10261 struct attribute
*attr_byte_size
;
10262 struct attribute
*attr_address_class
;
10263 int byte_size
, addr_class
;
10264 struct type
*target_type
;
10266 target_type
= die_type (die
, cu
);
10268 /* The die_type call above may have already set the type for this DIE. */
10269 type
= get_die_type (die
, cu
);
10273 type
= lookup_pointer_type (target_type
);
10275 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10276 if (attr_byte_size
)
10277 byte_size
= DW_UNSND (attr_byte_size
);
10279 byte_size
= cu_header
->addr_size
;
10281 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
10282 if (attr_address_class
)
10283 addr_class
= DW_UNSND (attr_address_class
);
10285 addr_class
= DW_ADDR_none
;
10287 /* If the pointer size or address class is different than the
10288 default, create a type variant marked as such and set the
10289 length accordingly. */
10290 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
10292 if (gdbarch_address_class_type_flags_p (gdbarch
))
10296 type_flags
= gdbarch_address_class_type_flags
10297 (gdbarch
, byte_size
, addr_class
);
10298 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
10300 type
= make_type_with_address_space (type
, type_flags
);
10302 else if (TYPE_LENGTH (type
) != byte_size
)
10304 complaint (&symfile_complaints
,
10305 _("invalid pointer size %d"), byte_size
);
10309 /* Should we also complain about unhandled address classes? */
10313 TYPE_LENGTH (type
) = byte_size
;
10314 return set_die_type (die
, type
, cu
);
10317 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
10318 the user defined type vector. */
10320 static struct type
*
10321 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10324 struct type
*to_type
;
10325 struct type
*domain
;
10327 to_type
= die_type (die
, cu
);
10328 domain
= die_containing_type (die
, cu
);
10330 /* The calls above may have already set the type for this DIE. */
10331 type
= get_die_type (die
, cu
);
10335 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
10336 type
= lookup_methodptr_type (to_type
);
10338 type
= lookup_memberptr_type (to_type
, domain
);
10340 return set_die_type (die
, type
, cu
);
10343 /* Extract all information from a DW_TAG_reference_type DIE and add to
10344 the user defined type vector. */
10346 static struct type
*
10347 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10349 struct comp_unit_head
*cu_header
= &cu
->header
;
10350 struct type
*type
, *target_type
;
10351 struct attribute
*attr
;
10353 target_type
= die_type (die
, cu
);
10355 /* The die_type call above may have already set the type for this DIE. */
10356 type
= get_die_type (die
, cu
);
10360 type
= lookup_reference_type (target_type
);
10361 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10364 TYPE_LENGTH (type
) = DW_UNSND (attr
);
10368 TYPE_LENGTH (type
) = cu_header
->addr_size
;
10370 return set_die_type (die
, type
, cu
);
10373 static struct type
*
10374 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10376 struct type
*base_type
, *cv_type
;
10378 base_type
= die_type (die
, cu
);
10380 /* The die_type call above may have already set the type for this DIE. */
10381 cv_type
= get_die_type (die
, cu
);
10385 /* In case the const qualifier is applied to an array type, the element type
10386 is so qualified, not the array type (section 6.7.3 of C99). */
10387 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
10389 struct type
*el_type
, *inner_array
;
10391 base_type
= copy_type (base_type
);
10392 inner_array
= base_type
;
10394 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
10396 TYPE_TARGET_TYPE (inner_array
) =
10397 copy_type (TYPE_TARGET_TYPE (inner_array
));
10398 inner_array
= TYPE_TARGET_TYPE (inner_array
);
10401 el_type
= TYPE_TARGET_TYPE (inner_array
);
10402 TYPE_TARGET_TYPE (inner_array
) =
10403 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
10405 return set_die_type (die
, base_type
, cu
);
10408 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
10409 return set_die_type (die
, cv_type
, cu
);
10412 static struct type
*
10413 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10415 struct type
*base_type
, *cv_type
;
10417 base_type
= die_type (die
, cu
);
10419 /* The die_type call above may have already set the type for this DIE. */
10420 cv_type
= get_die_type (die
, cu
);
10424 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
10425 return set_die_type (die
, cv_type
, cu
);
10428 /* Extract all information from a DW_TAG_string_type DIE and add to
10429 the user defined type vector. It isn't really a user defined type,
10430 but it behaves like one, with other DIE's using an AT_user_def_type
10431 attribute to reference it. */
10433 static struct type
*
10434 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10436 struct objfile
*objfile
= cu
->objfile
;
10437 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10438 struct type
*type
, *range_type
, *index_type
, *char_type
;
10439 struct attribute
*attr
;
10440 unsigned int length
;
10442 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
10445 length
= DW_UNSND (attr
);
10449 /* Check for the DW_AT_byte_size attribute. */
10450 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10453 length
= DW_UNSND (attr
);
10461 index_type
= objfile_type (objfile
)->builtin_int
;
10462 range_type
= create_range_type (NULL
, index_type
, 1, length
);
10463 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
10464 type
= create_string_type (NULL
, char_type
, range_type
);
10466 return set_die_type (die
, type
, cu
);
10469 /* Handle DIES due to C code like:
10473 int (*funcp)(int a, long l);
10477 ('funcp' generates a DW_TAG_subroutine_type DIE). */
10479 static struct type
*
10480 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10482 struct objfile
*objfile
= cu
->objfile
;
10483 struct type
*type
; /* Type that this function returns. */
10484 struct type
*ftype
; /* Function that returns above type. */
10485 struct attribute
*attr
;
10487 type
= die_type (die
, cu
);
10489 /* The die_type call above may have already set the type for this DIE. */
10490 ftype
= get_die_type (die
, cu
);
10494 ftype
= lookup_function_type (type
);
10496 /* All functions in C++, Pascal and Java have prototypes. */
10497 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
10498 if ((attr
&& (DW_UNSND (attr
) != 0))
10499 || cu
->language
== language_cplus
10500 || cu
->language
== language_java
10501 || cu
->language
== language_pascal
)
10502 TYPE_PROTOTYPED (ftype
) = 1;
10503 else if (producer_is_realview (cu
->producer
))
10504 /* RealView does not emit DW_AT_prototyped. We can not
10505 distinguish prototyped and unprototyped functions; default to
10506 prototyped, since that is more common in modern code (and
10507 RealView warns about unprototyped functions). */
10508 TYPE_PROTOTYPED (ftype
) = 1;
10510 /* Store the calling convention in the type if it's available in
10511 the subroutine die. Otherwise set the calling convention to
10512 the default value DW_CC_normal. */
10513 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
10515 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
10516 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
10517 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
10519 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
10521 /* We need to add the subroutine type to the die immediately so
10522 we don't infinitely recurse when dealing with parameters
10523 declared as the same subroutine type. */
10524 set_die_type (die
, ftype
, cu
);
10526 if (die
->child
!= NULL
)
10528 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
10529 struct die_info
*child_die
;
10530 int nparams
, iparams
;
10532 /* Count the number of parameters.
10533 FIXME: GDB currently ignores vararg functions, but knows about
10534 vararg member functions. */
10536 child_die
= die
->child
;
10537 while (child_die
&& child_die
->tag
)
10539 if (child_die
->tag
== DW_TAG_formal_parameter
)
10541 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
10542 TYPE_VARARGS (ftype
) = 1;
10543 child_die
= sibling_die (child_die
);
10546 /* Allocate storage for parameters and fill them in. */
10547 TYPE_NFIELDS (ftype
) = nparams
;
10548 TYPE_FIELDS (ftype
) = (struct field
*)
10549 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
10551 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
10552 even if we error out during the parameters reading below. */
10553 for (iparams
= 0; iparams
< nparams
; iparams
++)
10554 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
10557 child_die
= die
->child
;
10558 while (child_die
&& child_die
->tag
)
10560 if (child_die
->tag
== DW_TAG_formal_parameter
)
10562 struct type
*arg_type
;
10564 /* DWARF version 2 has no clean way to discern C++
10565 static and non-static member functions. G++ helps
10566 GDB by marking the first parameter for non-static
10567 member functions (which is the this pointer) as
10568 artificial. We pass this information to
10569 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
10571 DWARF version 3 added DW_AT_object_pointer, which GCC
10572 4.5 does not yet generate. */
10573 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
10575 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
10578 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
10580 /* GCC/43521: In java, the formal parameter
10581 "this" is sometimes not marked with DW_AT_artificial. */
10582 if (cu
->language
== language_java
)
10584 const char *name
= dwarf2_name (child_die
, cu
);
10586 if (name
&& !strcmp (name
, "this"))
10587 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
10590 arg_type
= die_type (child_die
, cu
);
10592 /* RealView does not mark THIS as const, which the testsuite
10593 expects. GCC marks THIS as const in method definitions,
10594 but not in the class specifications (GCC PR 43053). */
10595 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
10596 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
10599 struct dwarf2_cu
*arg_cu
= cu
;
10600 const char *name
= dwarf2_name (child_die
, cu
);
10602 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
10605 /* If the compiler emits this, use it. */
10606 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
10609 else if (name
&& strcmp (name
, "this") == 0)
10610 /* Function definitions will have the argument names. */
10612 else if (name
== NULL
&& iparams
== 0)
10613 /* Declarations may not have the names, so like
10614 elsewhere in GDB, assume an artificial first
10615 argument is "this". */
10619 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
10623 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
10626 child_die
= sibling_die (child_die
);
10633 static struct type
*
10634 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
10636 struct objfile
*objfile
= cu
->objfile
;
10637 const char *name
= NULL
;
10638 struct type
*this_type
, *target_type
;
10640 name
= dwarf2_full_name (NULL
, die
, cu
);
10641 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
10642 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
10643 TYPE_NAME (this_type
) = (char *) name
;
10644 set_die_type (die
, this_type
, cu
);
10645 target_type
= die_type (die
, cu
);
10646 if (target_type
!= this_type
)
10647 TYPE_TARGET_TYPE (this_type
) = target_type
;
10650 /* Self-referential typedefs are, it seems, not allowed by the DWARF
10651 spec and cause infinite loops in GDB. */
10652 complaint (&symfile_complaints
,
10653 _("Self-referential DW_TAG_typedef "
10654 "- DIE at 0x%x [in module %s]"),
10655 die
->offset
.sect_off
, objfile
->name
);
10656 TYPE_TARGET_TYPE (this_type
) = NULL
;
10661 /* Find a representation of a given base type and install
10662 it in the TYPE field of the die. */
10664 static struct type
*
10665 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10667 struct objfile
*objfile
= cu
->objfile
;
10669 struct attribute
*attr
;
10670 int encoding
= 0, size
= 0;
10672 enum type_code code
= TYPE_CODE_INT
;
10673 int type_flags
= 0;
10674 struct type
*target_type
= NULL
;
10676 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
10679 encoding
= DW_UNSND (attr
);
10681 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10684 size
= DW_UNSND (attr
);
10686 name
= dwarf2_name (die
, cu
);
10689 complaint (&symfile_complaints
,
10690 _("DW_AT_name missing from DW_TAG_base_type"));
10695 case DW_ATE_address
:
10696 /* Turn DW_ATE_address into a void * pointer. */
10697 code
= TYPE_CODE_PTR
;
10698 type_flags
|= TYPE_FLAG_UNSIGNED
;
10699 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
10701 case DW_ATE_boolean
:
10702 code
= TYPE_CODE_BOOL
;
10703 type_flags
|= TYPE_FLAG_UNSIGNED
;
10705 case DW_ATE_complex_float
:
10706 code
= TYPE_CODE_COMPLEX
;
10707 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
10709 case DW_ATE_decimal_float
:
10710 code
= TYPE_CODE_DECFLOAT
;
10713 code
= TYPE_CODE_FLT
;
10715 case DW_ATE_signed
:
10717 case DW_ATE_unsigned
:
10718 type_flags
|= TYPE_FLAG_UNSIGNED
;
10719 if (cu
->language
== language_fortran
10721 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
10722 code
= TYPE_CODE_CHAR
;
10724 case DW_ATE_signed_char
:
10725 if (cu
->language
== language_ada
|| cu
->language
== language_m2
10726 || cu
->language
== language_pascal
10727 || cu
->language
== language_fortran
)
10728 code
= TYPE_CODE_CHAR
;
10730 case DW_ATE_unsigned_char
:
10731 if (cu
->language
== language_ada
|| cu
->language
== language_m2
10732 || cu
->language
== language_pascal
10733 || cu
->language
== language_fortran
)
10734 code
= TYPE_CODE_CHAR
;
10735 type_flags
|= TYPE_FLAG_UNSIGNED
;
10738 /* We just treat this as an integer and then recognize the
10739 type by name elsewhere. */
10743 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
10744 dwarf_type_encoding_name (encoding
));
10748 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
10749 TYPE_NAME (type
) = name
;
10750 TYPE_TARGET_TYPE (type
) = target_type
;
10752 if (name
&& strcmp (name
, "char") == 0)
10753 TYPE_NOSIGN (type
) = 1;
10755 return set_die_type (die
, type
, cu
);
10758 /* Read the given DW_AT_subrange DIE. */
10760 static struct type
*
10761 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10763 struct type
*base_type
;
10764 struct type
*range_type
;
10765 struct attribute
*attr
;
10767 int low_default_is_valid
;
10769 LONGEST negative_mask
;
10771 base_type
= die_type (die
, cu
);
10772 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
10773 check_typedef (base_type
);
10775 /* The die_type call above may have already set the type for this DIE. */
10776 range_type
= get_die_type (die
, cu
);
10780 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
10781 omitting DW_AT_lower_bound. */
10782 switch (cu
->language
)
10785 case language_cplus
:
10787 low_default_is_valid
= 1;
10789 case language_fortran
:
10791 low_default_is_valid
= 1;
10794 case language_java
:
10795 case language_objc
:
10797 low_default_is_valid
= (cu
->header
.version
>= 4);
10801 case language_pascal
:
10803 low_default_is_valid
= (cu
->header
.version
>= 4);
10807 low_default_is_valid
= 0;
10811 /* FIXME: For variable sized arrays either of these could be
10812 a variable rather than a constant value. We'll allow it,
10813 but we don't know how to handle it. */
10814 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
10816 low
= dwarf2_get_attr_constant_value (attr
, low
);
10817 else if (!low_default_is_valid
)
10818 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
10819 "- DIE at 0x%x [in module %s]"),
10820 die
->offset
.sect_off
, cu
->objfile
->name
);
10822 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
10825 if (attr_form_is_block (attr
) || is_ref_attr (attr
))
10827 /* GCC encodes arrays with unspecified or dynamic length
10828 with a DW_FORM_block1 attribute or a reference attribute.
10829 FIXME: GDB does not yet know how to handle dynamic
10830 arrays properly, treat them as arrays with unspecified
10833 FIXME: jimb/2003-09-22: GDB does not really know
10834 how to handle arrays of unspecified length
10835 either; we just represent them as zero-length
10836 arrays. Choose an appropriate upper bound given
10837 the lower bound we've computed above. */
10841 high
= dwarf2_get_attr_constant_value (attr
, 1);
10845 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
10848 int count
= dwarf2_get_attr_constant_value (attr
, 1);
10849 high
= low
+ count
- 1;
10853 /* Unspecified array length. */
10858 /* Dwarf-2 specifications explicitly allows to create subrange types
10859 without specifying a base type.
10860 In that case, the base type must be set to the type of
10861 the lower bound, upper bound or count, in that order, if any of these
10862 three attributes references an object that has a type.
10863 If no base type is found, the Dwarf-2 specifications say that
10864 a signed integer type of size equal to the size of an address should
10866 For the following C code: `extern char gdb_int [];'
10867 GCC produces an empty range DIE.
10868 FIXME: muller/2010-05-28: Possible references to object for low bound,
10869 high bound or count are not yet handled by this code. */
10870 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
10872 struct objfile
*objfile
= cu
->objfile
;
10873 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10874 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
10875 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
10877 /* Test "int", "long int", and "long long int" objfile types,
10878 and select the first one having a size above or equal to the
10879 architecture address size. */
10880 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
10881 base_type
= int_type
;
10884 int_type
= objfile_type (objfile
)->builtin_long
;
10885 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
10886 base_type
= int_type
;
10889 int_type
= objfile_type (objfile
)->builtin_long_long
;
10890 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
10891 base_type
= int_type
;
10897 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
10898 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
10899 low
|= negative_mask
;
10900 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
10901 high
|= negative_mask
;
10903 range_type
= create_range_type (NULL
, base_type
, low
, high
);
10905 /* Mark arrays with dynamic length at least as an array of unspecified
10906 length. GDB could check the boundary but before it gets implemented at
10907 least allow accessing the array elements. */
10908 if (attr
&& attr_form_is_block (attr
))
10909 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
10911 /* Ada expects an empty array on no boundary attributes. */
10912 if (attr
== NULL
&& cu
->language
!= language_ada
)
10913 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
10915 name
= dwarf2_name (die
, cu
);
10917 TYPE_NAME (range_type
) = name
;
10919 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10921 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
10923 set_die_type (die
, range_type
, cu
);
10925 /* set_die_type should be already done. */
10926 set_descriptive_type (range_type
, die
, cu
);
10931 static struct type
*
10932 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10936 /* For now, we only support the C meaning of an unspecified type: void. */
10938 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
10939 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
10941 return set_die_type (die
, type
, cu
);
10944 /* Read a single die and all its descendents. Set the die's sibling
10945 field to NULL; set other fields in the die correctly, and set all
10946 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
10947 location of the info_ptr after reading all of those dies. PARENT
10948 is the parent of the die in question. */
10950 static struct die_info
*
10951 read_die_and_children (const struct die_reader_specs
*reader
,
10952 gdb_byte
*info_ptr
,
10953 gdb_byte
**new_info_ptr
,
10954 struct die_info
*parent
)
10956 struct die_info
*die
;
10960 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
10963 *new_info_ptr
= cur_ptr
;
10966 store_in_ref_table (die
, reader
->cu
);
10969 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
10973 *new_info_ptr
= cur_ptr
;
10976 die
->sibling
= NULL
;
10977 die
->parent
= parent
;
10981 /* Read a die, all of its descendents, and all of its siblings; set
10982 all of the fields of all of the dies correctly. Arguments are as
10983 in read_die_and_children. */
10985 static struct die_info
*
10986 read_die_and_siblings (const struct die_reader_specs
*reader
,
10987 gdb_byte
*info_ptr
,
10988 gdb_byte
**new_info_ptr
,
10989 struct die_info
*parent
)
10991 struct die_info
*first_die
, *last_sibling
;
10994 cur_ptr
= info_ptr
;
10995 first_die
= last_sibling
= NULL
;
10999 struct die_info
*die
11000 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
11004 *new_info_ptr
= cur_ptr
;
11011 last_sibling
->sibling
= die
;
11013 last_sibling
= die
;
11017 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
11019 The caller is responsible for filling in the extra attributes
11020 and updating (*DIEP)->num_attrs.
11021 Set DIEP to point to a newly allocated die with its information,
11022 except for its child, sibling, and parent fields.
11023 Set HAS_CHILDREN to tell whether the die has children or not. */
11026 read_full_die_1 (const struct die_reader_specs
*reader
,
11027 struct die_info
**diep
, gdb_byte
*info_ptr
,
11028 int *has_children
, int num_extra_attrs
)
11030 unsigned int abbrev_number
, bytes_read
, i
;
11031 sect_offset offset
;
11032 struct abbrev_info
*abbrev
;
11033 struct die_info
*die
;
11034 struct dwarf2_cu
*cu
= reader
->cu
;
11035 bfd
*abfd
= reader
->abfd
;
11037 offset
.sect_off
= info_ptr
- reader
->buffer
;
11038 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
11039 info_ptr
+= bytes_read
;
11040 if (!abbrev_number
)
11047 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
11049 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
11051 bfd_get_filename (abfd
));
11053 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
11054 die
->offset
= offset
;
11055 die
->tag
= abbrev
->tag
;
11056 die
->abbrev
= abbrev_number
;
11058 /* Make the result usable.
11059 The caller needs to update num_attrs after adding the extra
11061 die
->num_attrs
= abbrev
->num_attrs
;
11063 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
11064 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
11068 *has_children
= abbrev
->has_children
;
11072 /* Read a die and all its attributes.
11073 Set DIEP to point to a newly allocated die with its information,
11074 except for its child, sibling, and parent fields.
11075 Set HAS_CHILDREN to tell whether the die has children or not. */
11078 read_full_die (const struct die_reader_specs
*reader
,
11079 struct die_info
**diep
, gdb_byte
*info_ptr
,
11082 return read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
11085 /* Abbreviation tables.
11087 In DWARF version 2, the description of the debugging information is
11088 stored in a separate .debug_abbrev section. Before we read any
11089 dies from a section we read in all abbreviations and install them
11090 in a hash table. */
11092 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
11094 static struct abbrev_info
*
11095 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
11097 struct abbrev_info
*abbrev
;
11099 abbrev
= (struct abbrev_info
*)
11100 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
11101 memset (abbrev
, 0, sizeof (struct abbrev_info
));
11105 /* Add an abbreviation to the table. */
11108 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
11109 unsigned int abbrev_number
,
11110 struct abbrev_info
*abbrev
)
11112 unsigned int hash_number
;
11114 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
11115 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
11116 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
11119 /* Look up an abbrev in the table.
11120 Returns NULL if the abbrev is not found. */
11122 static struct abbrev_info
*
11123 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
11124 unsigned int abbrev_number
)
11126 unsigned int hash_number
;
11127 struct abbrev_info
*abbrev
;
11129 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
11130 abbrev
= abbrev_table
->abbrevs
[hash_number
];
11134 if (abbrev
->number
== abbrev_number
)
11136 abbrev
= abbrev
->next
;
11141 /* Read in an abbrev table. */
11143 static struct abbrev_table
*
11144 abbrev_table_read_table (struct dwarf2_section_info
*section
,
11145 sect_offset offset
)
11147 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11148 bfd
*abfd
= section
->asection
->owner
;
11149 struct abbrev_table
*abbrev_table
;
11150 gdb_byte
*abbrev_ptr
;
11151 struct abbrev_info
*cur_abbrev
;
11152 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
11153 unsigned int abbrev_form
;
11154 struct attr_abbrev
*cur_attrs
;
11155 unsigned int allocated_attrs
;
11157 abbrev_table
= XMALLOC (struct abbrev_table
);
11158 obstack_init (&abbrev_table
->abbrev_obstack
);
11159 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
11161 * sizeof (struct abbrev_info
*)));
11162 memset (abbrev_table
->abbrevs
, 0,
11163 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
11165 dwarf2_read_section (objfile
, section
);
11166 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
11167 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
11168 abbrev_ptr
+= bytes_read
;
11170 allocated_attrs
= ATTR_ALLOC_CHUNK
;
11171 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
11173 /* Loop until we reach an abbrev number of 0. */
11174 while (abbrev_number
)
11176 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
11178 /* read in abbrev header */
11179 cur_abbrev
->number
= abbrev_number
;
11180 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
11181 abbrev_ptr
+= bytes_read
;
11182 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
11185 /* now read in declarations */
11186 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
11187 abbrev_ptr
+= bytes_read
;
11188 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
11189 abbrev_ptr
+= bytes_read
;
11190 while (abbrev_name
)
11192 if (cur_abbrev
->num_attrs
== allocated_attrs
)
11194 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
11196 = xrealloc (cur_attrs
, (allocated_attrs
11197 * sizeof (struct attr_abbrev
)));
11200 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
11201 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
11202 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
11203 abbrev_ptr
+= bytes_read
;
11204 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
11205 abbrev_ptr
+= bytes_read
;
11208 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
11209 (cur_abbrev
->num_attrs
11210 * sizeof (struct attr_abbrev
)));
11211 memcpy (cur_abbrev
->attrs
, cur_attrs
,
11212 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
11214 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
11216 /* Get next abbreviation.
11217 Under Irix6 the abbreviations for a compilation unit are not
11218 always properly terminated with an abbrev number of 0.
11219 Exit loop if we encounter an abbreviation which we have
11220 already read (which means we are about to read the abbreviations
11221 for the next compile unit) or if the end of the abbreviation
11222 table is reached. */
11223 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
11225 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
11226 abbrev_ptr
+= bytes_read
;
11227 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
11232 return abbrev_table
;
11235 /* Free the resources held by ABBREV_TABLE. */
11238 abbrev_table_free (struct abbrev_table
*abbrev_table
)
11240 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
11241 xfree (abbrev_table
);
11244 /* Read the abbrev table for CU from ABBREV_SECTION. */
11247 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
11248 struct dwarf2_section_info
*abbrev_section
)
11251 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
11254 /* Release the memory used by the abbrev table for a compilation unit. */
11257 dwarf2_free_abbrev_table (void *ptr_to_cu
)
11259 struct dwarf2_cu
*cu
= ptr_to_cu
;
11261 abbrev_table_free (cu
->abbrev_table
);
11262 /* Set this to NULL so that we SEGV if we try to read it later,
11263 and also because free_comp_unit verifies this is NULL. */
11264 cu
->abbrev_table
= NULL
;
11267 /* Returns nonzero if TAG represents a type that we might generate a partial
11271 is_type_tag_for_partial (int tag
)
11276 /* Some types that would be reasonable to generate partial symbols for,
11277 that we don't at present. */
11278 case DW_TAG_array_type
:
11279 case DW_TAG_file_type
:
11280 case DW_TAG_ptr_to_member_type
:
11281 case DW_TAG_set_type
:
11282 case DW_TAG_string_type
:
11283 case DW_TAG_subroutine_type
:
11285 case DW_TAG_base_type
:
11286 case DW_TAG_class_type
:
11287 case DW_TAG_interface_type
:
11288 case DW_TAG_enumeration_type
:
11289 case DW_TAG_structure_type
:
11290 case DW_TAG_subrange_type
:
11291 case DW_TAG_typedef
:
11292 case DW_TAG_union_type
:
11299 /* Load all DIEs that are interesting for partial symbols into memory. */
11301 static struct partial_die_info
*
11302 load_partial_dies (const struct die_reader_specs
*reader
,
11303 gdb_byte
*info_ptr
, int building_psymtab
)
11305 struct dwarf2_cu
*cu
= reader
->cu
;
11306 struct objfile
*objfile
= cu
->objfile
;
11307 struct partial_die_info
*part_die
;
11308 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
11309 struct abbrev_info
*abbrev
;
11310 unsigned int bytes_read
;
11311 unsigned int load_all
= 0;
11312 int nesting_level
= 1;
11317 gdb_assert (cu
->per_cu
!= NULL
);
11318 if (cu
->per_cu
->load_all_dies
)
11322 = htab_create_alloc_ex (cu
->header
.length
/ 12,
11326 &cu
->comp_unit_obstack
,
11327 hashtab_obstack_allocate
,
11328 dummy_obstack_deallocate
);
11330 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
11331 sizeof (struct partial_die_info
));
11335 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
11337 /* A NULL abbrev means the end of a series of children. */
11338 if (abbrev
== NULL
)
11340 if (--nesting_level
== 0)
11342 /* PART_DIE was probably the last thing allocated on the
11343 comp_unit_obstack, so we could call obstack_free
11344 here. We don't do that because the waste is small,
11345 and will be cleaned up when we're done with this
11346 compilation unit. This way, we're also more robust
11347 against other users of the comp_unit_obstack. */
11350 info_ptr
+= bytes_read
;
11351 last_die
= parent_die
;
11352 parent_die
= parent_die
->die_parent
;
11356 /* Check for template arguments. We never save these; if
11357 they're seen, we just mark the parent, and go on our way. */
11358 if (parent_die
!= NULL
11359 && cu
->language
== language_cplus
11360 && (abbrev
->tag
== DW_TAG_template_type_param
11361 || abbrev
->tag
== DW_TAG_template_value_param
))
11363 parent_die
->has_template_arguments
= 1;
11367 /* We don't need a partial DIE for the template argument. */
11368 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
11373 /* We only recurse into c++ subprograms looking for template arguments.
11374 Skip their other children. */
11376 && cu
->language
== language_cplus
11377 && parent_die
!= NULL
11378 && parent_die
->tag
== DW_TAG_subprogram
)
11380 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
11384 /* Check whether this DIE is interesting enough to save. Normally
11385 we would not be interested in members here, but there may be
11386 later variables referencing them via DW_AT_specification (for
11387 static members). */
11389 && !is_type_tag_for_partial (abbrev
->tag
)
11390 && abbrev
->tag
!= DW_TAG_constant
11391 && abbrev
->tag
!= DW_TAG_enumerator
11392 && abbrev
->tag
!= DW_TAG_subprogram
11393 && abbrev
->tag
!= DW_TAG_lexical_block
11394 && abbrev
->tag
!= DW_TAG_variable
11395 && abbrev
->tag
!= DW_TAG_namespace
11396 && abbrev
->tag
!= DW_TAG_module
11397 && abbrev
->tag
!= DW_TAG_member
11398 && abbrev
->tag
!= DW_TAG_imported_unit
)
11400 /* Otherwise we skip to the next sibling, if any. */
11401 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
11405 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
11408 /* This two-pass algorithm for processing partial symbols has a
11409 high cost in cache pressure. Thus, handle some simple cases
11410 here which cover the majority of C partial symbols. DIEs
11411 which neither have specification tags in them, nor could have
11412 specification tags elsewhere pointing at them, can simply be
11413 processed and discarded.
11415 This segment is also optional; scan_partial_symbols and
11416 add_partial_symbol will handle these DIEs if we chain
11417 them in normally. When compilers which do not emit large
11418 quantities of duplicate debug information are more common,
11419 this code can probably be removed. */
11421 /* Any complete simple types at the top level (pretty much all
11422 of them, for a language without namespaces), can be processed
11424 if (parent_die
== NULL
11425 && part_die
->has_specification
== 0
11426 && part_die
->is_declaration
== 0
11427 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
11428 || part_die
->tag
== DW_TAG_base_type
11429 || part_die
->tag
== DW_TAG_subrange_type
))
11431 if (building_psymtab
&& part_die
->name
!= NULL
)
11432 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
11433 VAR_DOMAIN
, LOC_TYPEDEF
,
11434 &objfile
->static_psymbols
,
11435 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
11436 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
11440 /* The exception for DW_TAG_typedef with has_children above is
11441 a workaround of GCC PR debug/47510. In the case of this complaint
11442 type_name_no_tag_or_error will error on such types later.
11444 GDB skipped children of DW_TAG_typedef by the shortcut above and then
11445 it could not find the child DIEs referenced later, this is checked
11446 above. In correct DWARF DW_TAG_typedef should have no children. */
11448 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
11449 complaint (&symfile_complaints
,
11450 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
11451 "- DIE at 0x%x [in module %s]"),
11452 part_die
->offset
.sect_off
, objfile
->name
);
11454 /* If we're at the second level, and we're an enumerator, and
11455 our parent has no specification (meaning possibly lives in a
11456 namespace elsewhere), then we can add the partial symbol now
11457 instead of queueing it. */
11458 if (part_die
->tag
== DW_TAG_enumerator
11459 && parent_die
!= NULL
11460 && parent_die
->die_parent
== NULL
11461 && parent_die
->tag
== DW_TAG_enumeration_type
11462 && parent_die
->has_specification
== 0)
11464 if (part_die
->name
== NULL
)
11465 complaint (&symfile_complaints
,
11466 _("malformed enumerator DIE ignored"));
11467 else if (building_psymtab
)
11468 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
11469 VAR_DOMAIN
, LOC_CONST
,
11470 (cu
->language
== language_cplus
11471 || cu
->language
== language_java
)
11472 ? &objfile
->global_psymbols
11473 : &objfile
->static_psymbols
,
11474 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
11476 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
11480 /* We'll save this DIE so link it in. */
11481 part_die
->die_parent
= parent_die
;
11482 part_die
->die_sibling
= NULL
;
11483 part_die
->die_child
= NULL
;
11485 if (last_die
&& last_die
== parent_die
)
11486 last_die
->die_child
= part_die
;
11488 last_die
->die_sibling
= part_die
;
11490 last_die
= part_die
;
11492 if (first_die
== NULL
)
11493 first_die
= part_die
;
11495 /* Maybe add the DIE to the hash table. Not all DIEs that we
11496 find interesting need to be in the hash table, because we
11497 also have the parent/sibling/child chains; only those that we
11498 might refer to by offset later during partial symbol reading.
11500 For now this means things that might have be the target of a
11501 DW_AT_specification, DW_AT_abstract_origin, or
11502 DW_AT_extension. DW_AT_extension will refer only to
11503 namespaces; DW_AT_abstract_origin refers to functions (and
11504 many things under the function DIE, but we do not recurse
11505 into function DIEs during partial symbol reading) and
11506 possibly variables as well; DW_AT_specification refers to
11507 declarations. Declarations ought to have the DW_AT_declaration
11508 flag. It happens that GCC forgets to put it in sometimes, but
11509 only for functions, not for types.
11511 Adding more things than necessary to the hash table is harmless
11512 except for the performance cost. Adding too few will result in
11513 wasted time in find_partial_die, when we reread the compilation
11514 unit with load_all_dies set. */
11517 || abbrev
->tag
== DW_TAG_constant
11518 || abbrev
->tag
== DW_TAG_subprogram
11519 || abbrev
->tag
== DW_TAG_variable
11520 || abbrev
->tag
== DW_TAG_namespace
11521 || part_die
->is_declaration
)
11525 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
11526 part_die
->offset
.sect_off
, INSERT
);
11530 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
11531 sizeof (struct partial_die_info
));
11533 /* For some DIEs we want to follow their children (if any). For C
11534 we have no reason to follow the children of structures; for other
11535 languages we have to, so that we can get at method physnames
11536 to infer fully qualified class names, for DW_AT_specification,
11537 and for C++ template arguments. For C++, we also look one level
11538 inside functions to find template arguments (if the name of the
11539 function does not already contain the template arguments).
11541 For Ada, we need to scan the children of subprograms and lexical
11542 blocks as well because Ada allows the definition of nested
11543 entities that could be interesting for the debugger, such as
11544 nested subprograms for instance. */
11545 if (last_die
->has_children
11547 || last_die
->tag
== DW_TAG_namespace
11548 || last_die
->tag
== DW_TAG_module
11549 || last_die
->tag
== DW_TAG_enumeration_type
11550 || (cu
->language
== language_cplus
11551 && last_die
->tag
== DW_TAG_subprogram
11552 && (last_die
->name
== NULL
11553 || strchr (last_die
->name
, '<') == NULL
))
11554 || (cu
->language
!= language_c
11555 && (last_die
->tag
== DW_TAG_class_type
11556 || last_die
->tag
== DW_TAG_interface_type
11557 || last_die
->tag
== DW_TAG_structure_type
11558 || last_die
->tag
== DW_TAG_union_type
))
11559 || (cu
->language
== language_ada
11560 && (last_die
->tag
== DW_TAG_subprogram
11561 || last_die
->tag
== DW_TAG_lexical_block
))))
11564 parent_die
= last_die
;
11568 /* Otherwise we skip to the next sibling, if any. */
11569 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
11571 /* Back to the top, do it again. */
11575 /* Read a minimal amount of information into the minimal die structure. */
11578 read_partial_die (const struct die_reader_specs
*reader
,
11579 struct partial_die_info
*part_die
,
11580 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
11581 gdb_byte
*info_ptr
)
11583 struct dwarf2_cu
*cu
= reader
->cu
;
11584 struct objfile
*objfile
= cu
->objfile
;
11585 gdb_byte
*buffer
= reader
->buffer
;
11587 struct attribute attr
;
11588 int has_low_pc_attr
= 0;
11589 int has_high_pc_attr
= 0;
11590 int high_pc_relative
= 0;
11592 memset (part_die
, 0, sizeof (struct partial_die_info
));
11594 part_die
->offset
.sect_off
= info_ptr
- buffer
;
11596 info_ptr
+= abbrev_len
;
11598 if (abbrev
== NULL
)
11601 part_die
->tag
= abbrev
->tag
;
11602 part_die
->has_children
= abbrev
->has_children
;
11604 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
11606 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
11608 /* Store the data if it is of an attribute we want to keep in a
11609 partial symbol table. */
11613 switch (part_die
->tag
)
11615 case DW_TAG_compile_unit
:
11616 case DW_TAG_partial_unit
:
11617 case DW_TAG_type_unit
:
11618 /* Compilation units have a DW_AT_name that is a filename, not
11619 a source language identifier. */
11620 case DW_TAG_enumeration_type
:
11621 case DW_TAG_enumerator
:
11622 /* These tags always have simple identifiers already; no need
11623 to canonicalize them. */
11624 part_die
->name
= DW_STRING (&attr
);
11628 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
11629 &objfile
->objfile_obstack
);
11633 case DW_AT_linkage_name
:
11634 case DW_AT_MIPS_linkage_name
:
11635 /* Note that both forms of linkage name might appear. We
11636 assume they will be the same, and we only store the last
11638 if (cu
->language
== language_ada
)
11639 part_die
->name
= DW_STRING (&attr
);
11640 part_die
->linkage_name
= DW_STRING (&attr
);
11643 has_low_pc_attr
= 1;
11644 part_die
->lowpc
= DW_ADDR (&attr
);
11646 case DW_AT_high_pc
:
11647 has_high_pc_attr
= 1;
11648 if (attr
.form
== DW_FORM_addr
11649 || attr
.form
== DW_FORM_GNU_addr_index
)
11650 part_die
->highpc
= DW_ADDR (&attr
);
11653 high_pc_relative
= 1;
11654 part_die
->highpc
= DW_UNSND (&attr
);
11657 case DW_AT_location
:
11658 /* Support the .debug_loc offsets. */
11659 if (attr_form_is_block (&attr
))
11661 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
11663 else if (attr_form_is_section_offset (&attr
))
11665 dwarf2_complex_location_expr_complaint ();
11669 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
11670 "partial symbol information");
11673 case DW_AT_external
:
11674 part_die
->is_external
= DW_UNSND (&attr
);
11676 case DW_AT_declaration
:
11677 part_die
->is_declaration
= DW_UNSND (&attr
);
11680 part_die
->has_type
= 1;
11682 case DW_AT_abstract_origin
:
11683 case DW_AT_specification
:
11684 case DW_AT_extension
:
11685 part_die
->has_specification
= 1;
11686 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
11688 case DW_AT_sibling
:
11689 /* Ignore absolute siblings, they might point outside of
11690 the current compile unit. */
11691 if (attr
.form
== DW_FORM_ref_addr
)
11692 complaint (&symfile_complaints
,
11693 _("ignoring absolute DW_AT_sibling"));
11695 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
11697 case DW_AT_byte_size
:
11698 part_die
->has_byte_size
= 1;
11700 case DW_AT_calling_convention
:
11701 /* DWARF doesn't provide a way to identify a program's source-level
11702 entry point. DW_AT_calling_convention attributes are only meant
11703 to describe functions' calling conventions.
11705 However, because it's a necessary piece of information in
11706 Fortran, and because DW_CC_program is the only piece of debugging
11707 information whose definition refers to a 'main program' at all,
11708 several compilers have begun marking Fortran main programs with
11709 DW_CC_program --- even when those functions use the standard
11710 calling conventions.
11712 So until DWARF specifies a way to provide this information and
11713 compilers pick up the new representation, we'll support this
11715 if (DW_UNSND (&attr
) == DW_CC_program
11716 && cu
->language
== language_fortran
)
11718 set_main_name (part_die
->name
);
11720 /* As this DIE has a static linkage the name would be difficult
11721 to look up later. */
11722 language_of_main
= language_fortran
;
11726 if (DW_UNSND (&attr
) == DW_INL_inlined
11727 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
11728 part_die
->may_be_inlined
= 1;
11732 if (part_die
->tag
== DW_TAG_imported_unit
)
11733 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
11741 if (high_pc_relative
)
11742 part_die
->highpc
+= part_die
->lowpc
;
11744 if (has_low_pc_attr
&& has_high_pc_attr
)
11746 /* When using the GNU linker, .gnu.linkonce. sections are used to
11747 eliminate duplicate copies of functions and vtables and such.
11748 The linker will arbitrarily choose one and discard the others.
11749 The AT_*_pc values for such functions refer to local labels in
11750 these sections. If the section from that file was discarded, the
11751 labels are not in the output, so the relocs get a value of 0.
11752 If this is a discarded function, mark the pc bounds as invalid,
11753 so that GDB will ignore it. */
11754 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
11756 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11758 complaint (&symfile_complaints
,
11759 _("DW_AT_low_pc %s is zero "
11760 "for DIE at 0x%x [in module %s]"),
11761 paddress (gdbarch
, part_die
->lowpc
),
11762 part_die
->offset
.sect_off
, objfile
->name
);
11764 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
11765 else if (part_die
->lowpc
>= part_die
->highpc
)
11767 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11769 complaint (&symfile_complaints
,
11770 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
11771 "for DIE at 0x%x [in module %s]"),
11772 paddress (gdbarch
, part_die
->lowpc
),
11773 paddress (gdbarch
, part_die
->highpc
),
11774 part_die
->offset
.sect_off
, objfile
->name
);
11777 part_die
->has_pc_info
= 1;
11783 /* Find a cached partial DIE at OFFSET in CU. */
11785 static struct partial_die_info
*
11786 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
11788 struct partial_die_info
*lookup_die
= NULL
;
11789 struct partial_die_info part_die
;
11791 part_die
.offset
= offset
;
11792 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
11798 /* Find a partial DIE at OFFSET, which may or may not be in CU,
11799 except in the case of .debug_types DIEs which do not reference
11800 outside their CU (they do however referencing other types via
11801 DW_FORM_ref_sig8). */
11803 static struct partial_die_info
*
11804 find_partial_die (sect_offset offset
, struct dwarf2_cu
*cu
)
11806 struct objfile
*objfile
= cu
->objfile
;
11807 struct dwarf2_per_cu_data
*per_cu
= NULL
;
11808 struct partial_die_info
*pd
= NULL
;
11810 if (offset_in_cu_p (&cu
->header
, offset
))
11812 pd
= find_partial_die_in_comp_unit (offset
, cu
);
11815 /* We missed recording what we needed.
11816 Load all dies and try again. */
11817 per_cu
= cu
->per_cu
;
11821 /* TUs don't reference other CUs/TUs (except via type signatures). */
11822 if (cu
->per_cu
->is_debug_types
)
11824 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
11825 " external reference to offset 0x%lx [in module %s].\n"),
11826 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
11827 bfd_get_filename (objfile
->obfd
));
11829 per_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
11831 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
11832 load_partial_comp_unit (per_cu
);
11834 per_cu
->cu
->last_used
= 0;
11835 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
11838 /* If we didn't find it, and not all dies have been loaded,
11839 load them all and try again. */
11841 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
11843 per_cu
->load_all_dies
= 1;
11845 /* This is nasty. When we reread the DIEs, somewhere up the call chain
11846 THIS_CU->cu may already be in use. So we can't just free it and
11847 replace its DIEs with the ones we read in. Instead, we leave those
11848 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
11849 and clobber THIS_CU->cu->partial_dies with the hash table for the new
11851 load_partial_comp_unit (per_cu
);
11853 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
11857 internal_error (__FILE__
, __LINE__
,
11858 _("could not find partial DIE 0x%x "
11859 "in cache [from module %s]\n"),
11860 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
11864 /* See if we can figure out if the class lives in a namespace. We do
11865 this by looking for a member function; its demangled name will
11866 contain namespace info, if there is any. */
11869 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
11870 struct dwarf2_cu
*cu
)
11872 /* NOTE: carlton/2003-10-07: Getting the info this way changes
11873 what template types look like, because the demangler
11874 frequently doesn't give the same name as the debug info. We
11875 could fix this by only using the demangled name to get the
11876 prefix (but see comment in read_structure_type). */
11878 struct partial_die_info
*real_pdi
;
11879 struct partial_die_info
*child_pdi
;
11881 /* If this DIE (this DIE's specification, if any) has a parent, then
11882 we should not do this. We'll prepend the parent's fully qualified
11883 name when we create the partial symbol. */
11885 real_pdi
= struct_pdi
;
11886 while (real_pdi
->has_specification
)
11887 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
11889 if (real_pdi
->die_parent
!= NULL
)
11892 for (child_pdi
= struct_pdi
->die_child
;
11894 child_pdi
= child_pdi
->die_sibling
)
11896 if (child_pdi
->tag
== DW_TAG_subprogram
11897 && child_pdi
->linkage_name
!= NULL
)
11899 char *actual_class_name
11900 = language_class_name_from_physname (cu
->language_defn
,
11901 child_pdi
->linkage_name
);
11902 if (actual_class_name
!= NULL
)
11905 = obsavestring (actual_class_name
,
11906 strlen (actual_class_name
),
11907 &cu
->objfile
->objfile_obstack
);
11908 xfree (actual_class_name
);
11915 /* Adjust PART_DIE before generating a symbol for it. This function
11916 may set the is_external flag or change the DIE's name. */
11919 fixup_partial_die (struct partial_die_info
*part_die
,
11920 struct dwarf2_cu
*cu
)
11922 /* Once we've fixed up a die, there's no point in doing so again.
11923 This also avoids a memory leak if we were to call
11924 guess_partial_die_structure_name multiple times. */
11925 if (part_die
->fixup_called
)
11928 /* If we found a reference attribute and the DIE has no name, try
11929 to find a name in the referred to DIE. */
11931 if (part_die
->name
== NULL
&& part_die
->has_specification
)
11933 struct partial_die_info
*spec_die
;
11935 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
11937 fixup_partial_die (spec_die
, cu
);
11939 if (spec_die
->name
)
11941 part_die
->name
= spec_die
->name
;
11943 /* Copy DW_AT_external attribute if it is set. */
11944 if (spec_die
->is_external
)
11945 part_die
->is_external
= spec_die
->is_external
;
11949 /* Set default names for some unnamed DIEs. */
11951 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
11952 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
11954 /* If there is no parent die to provide a namespace, and there are
11955 children, see if we can determine the namespace from their linkage
11957 if (cu
->language
== language_cplus
11958 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
11959 && part_die
->die_parent
== NULL
11960 && part_die
->has_children
11961 && (part_die
->tag
== DW_TAG_class_type
11962 || part_die
->tag
== DW_TAG_structure_type
11963 || part_die
->tag
== DW_TAG_union_type
))
11964 guess_partial_die_structure_name (part_die
, cu
);
11966 /* GCC might emit a nameless struct or union that has a linkage
11967 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
11968 if (part_die
->name
== NULL
11969 && (part_die
->tag
== DW_TAG_class_type
11970 || part_die
->tag
== DW_TAG_interface_type
11971 || part_die
->tag
== DW_TAG_structure_type
11972 || part_die
->tag
== DW_TAG_union_type
)
11973 && part_die
->linkage_name
!= NULL
)
11977 demangled
= cplus_demangle (part_die
->linkage_name
, DMGL_TYPES
);
11982 /* Strip any leading namespaces/classes, keep only the base name.
11983 DW_AT_name for named DIEs does not contain the prefixes. */
11984 base
= strrchr (demangled
, ':');
11985 if (base
&& base
> demangled
&& base
[-1] == ':')
11990 part_die
->name
= obsavestring (base
, strlen (base
),
11991 &cu
->objfile
->objfile_obstack
);
11996 part_die
->fixup_called
= 1;
11999 /* Read an attribute value described by an attribute form. */
12002 read_attribute_value (const struct die_reader_specs
*reader
,
12003 struct attribute
*attr
, unsigned form
,
12004 gdb_byte
*info_ptr
)
12006 struct dwarf2_cu
*cu
= reader
->cu
;
12007 bfd
*abfd
= reader
->abfd
;
12008 struct comp_unit_head
*cu_header
= &cu
->header
;
12009 unsigned int bytes_read
;
12010 struct dwarf_block
*blk
;
12015 case DW_FORM_ref_addr
:
12016 if (cu
->header
.version
== 2)
12017 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
12019 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
12020 &cu
->header
, &bytes_read
);
12021 info_ptr
+= bytes_read
;
12024 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
12025 info_ptr
+= bytes_read
;
12027 case DW_FORM_block2
:
12028 blk
= dwarf_alloc_block (cu
);
12029 blk
->size
= read_2_bytes (abfd
, info_ptr
);
12031 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
12032 info_ptr
+= blk
->size
;
12033 DW_BLOCK (attr
) = blk
;
12035 case DW_FORM_block4
:
12036 blk
= dwarf_alloc_block (cu
);
12037 blk
->size
= read_4_bytes (abfd
, info_ptr
);
12039 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
12040 info_ptr
+= blk
->size
;
12041 DW_BLOCK (attr
) = blk
;
12043 case DW_FORM_data2
:
12044 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
12047 case DW_FORM_data4
:
12048 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
12051 case DW_FORM_data8
:
12052 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
12055 case DW_FORM_sec_offset
:
12056 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
12057 info_ptr
+= bytes_read
;
12059 case DW_FORM_string
:
12060 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
12061 DW_STRING_IS_CANONICAL (attr
) = 0;
12062 info_ptr
+= bytes_read
;
12065 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
12067 DW_STRING_IS_CANONICAL (attr
) = 0;
12068 info_ptr
+= bytes_read
;
12070 case DW_FORM_exprloc
:
12071 case DW_FORM_block
:
12072 blk
= dwarf_alloc_block (cu
);
12073 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
12074 info_ptr
+= bytes_read
;
12075 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
12076 info_ptr
+= blk
->size
;
12077 DW_BLOCK (attr
) = blk
;
12079 case DW_FORM_block1
:
12080 blk
= dwarf_alloc_block (cu
);
12081 blk
->size
= read_1_byte (abfd
, info_ptr
);
12083 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
12084 info_ptr
+= blk
->size
;
12085 DW_BLOCK (attr
) = blk
;
12087 case DW_FORM_data1
:
12088 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
12092 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
12095 case DW_FORM_flag_present
:
12096 DW_UNSND (attr
) = 1;
12098 case DW_FORM_sdata
:
12099 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
12100 info_ptr
+= bytes_read
;
12102 case DW_FORM_udata
:
12103 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
12104 info_ptr
+= bytes_read
;
12107 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
12108 + read_1_byte (abfd
, info_ptr
));
12112 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
12113 + read_2_bytes (abfd
, info_ptr
));
12117 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
12118 + read_4_bytes (abfd
, info_ptr
));
12122 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
12123 + read_8_bytes (abfd
, info_ptr
));
12126 case DW_FORM_ref_sig8
:
12127 /* Convert the signature to something we can record in DW_UNSND
12129 NOTE: This is NULL if the type wasn't found. */
12130 DW_SIGNATURED_TYPE (attr
) =
12131 lookup_signatured_type (read_8_bytes (abfd
, info_ptr
));
12134 case DW_FORM_ref_udata
:
12135 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
12136 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
12137 info_ptr
+= bytes_read
;
12139 case DW_FORM_indirect
:
12140 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
12141 info_ptr
+= bytes_read
;
12142 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
12144 case DW_FORM_GNU_addr_index
:
12145 if (reader
->dwo_file
== NULL
)
12147 /* For now flag a hard error.
12148 Later we can turn this into a complaint. */
12149 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
12150 dwarf_form_name (form
),
12151 bfd_get_filename (abfd
));
12153 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
12154 info_ptr
+= bytes_read
;
12156 case DW_FORM_GNU_str_index
:
12157 if (reader
->dwo_file
== NULL
)
12159 /* For now flag a hard error.
12160 Later we can turn this into a complaint if warranted. */
12161 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
12162 dwarf_form_name (form
),
12163 bfd_get_filename (abfd
));
12166 ULONGEST str_index
=
12167 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
12169 DW_STRING (attr
) = read_str_index (reader
, cu
, str_index
);
12170 DW_STRING_IS_CANONICAL (attr
) = 0;
12171 info_ptr
+= bytes_read
;
12175 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
12176 dwarf_form_name (form
),
12177 bfd_get_filename (abfd
));
12180 /* We have seen instances where the compiler tried to emit a byte
12181 size attribute of -1 which ended up being encoded as an unsigned
12182 0xffffffff. Although 0xffffffff is technically a valid size value,
12183 an object of this size seems pretty unlikely so we can relatively
12184 safely treat these cases as if the size attribute was invalid and
12185 treat them as zero by default. */
12186 if (attr
->name
== DW_AT_byte_size
12187 && form
== DW_FORM_data4
12188 && DW_UNSND (attr
) >= 0xffffffff)
12191 (&symfile_complaints
,
12192 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
12193 hex_string (DW_UNSND (attr
)));
12194 DW_UNSND (attr
) = 0;
12200 /* Read an attribute described by an abbreviated attribute. */
12203 read_attribute (const struct die_reader_specs
*reader
,
12204 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
12205 gdb_byte
*info_ptr
)
12207 attr
->name
= abbrev
->name
;
12208 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
12211 /* Read dwarf information from a buffer. */
12213 static unsigned int
12214 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
12216 return bfd_get_8 (abfd
, buf
);
12220 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
12222 return bfd_get_signed_8 (abfd
, buf
);
12225 static unsigned int
12226 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
12228 return bfd_get_16 (abfd
, buf
);
12232 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
12234 return bfd_get_signed_16 (abfd
, buf
);
12237 static unsigned int
12238 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
12240 return bfd_get_32 (abfd
, buf
);
12244 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
12246 return bfd_get_signed_32 (abfd
, buf
);
12250 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
12252 return bfd_get_64 (abfd
, buf
);
12256 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
12257 unsigned int *bytes_read
)
12259 struct comp_unit_head
*cu_header
= &cu
->header
;
12260 CORE_ADDR retval
= 0;
12262 if (cu_header
->signed_addr_p
)
12264 switch (cu_header
->addr_size
)
12267 retval
= bfd_get_signed_16 (abfd
, buf
);
12270 retval
= bfd_get_signed_32 (abfd
, buf
);
12273 retval
= bfd_get_signed_64 (abfd
, buf
);
12276 internal_error (__FILE__
, __LINE__
,
12277 _("read_address: bad switch, signed [in module %s]"),
12278 bfd_get_filename (abfd
));
12283 switch (cu_header
->addr_size
)
12286 retval
= bfd_get_16 (abfd
, buf
);
12289 retval
= bfd_get_32 (abfd
, buf
);
12292 retval
= bfd_get_64 (abfd
, buf
);
12295 internal_error (__FILE__
, __LINE__
,
12296 _("read_address: bad switch, "
12297 "unsigned [in module %s]"),
12298 bfd_get_filename (abfd
));
12302 *bytes_read
= cu_header
->addr_size
;
12306 /* Read the initial length from a section. The (draft) DWARF 3
12307 specification allows the initial length to take up either 4 bytes
12308 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
12309 bytes describe the length and all offsets will be 8 bytes in length
12312 An older, non-standard 64-bit format is also handled by this
12313 function. The older format in question stores the initial length
12314 as an 8-byte quantity without an escape value. Lengths greater
12315 than 2^32 aren't very common which means that the initial 4 bytes
12316 is almost always zero. Since a length value of zero doesn't make
12317 sense for the 32-bit format, this initial zero can be considered to
12318 be an escape value which indicates the presence of the older 64-bit
12319 format. As written, the code can't detect (old format) lengths
12320 greater than 4GB. If it becomes necessary to handle lengths
12321 somewhat larger than 4GB, we could allow other small values (such
12322 as the non-sensical values of 1, 2, and 3) to also be used as
12323 escape values indicating the presence of the old format.
12325 The value returned via bytes_read should be used to increment the
12326 relevant pointer after calling read_initial_length().
12328 [ Note: read_initial_length() and read_offset() are based on the
12329 document entitled "DWARF Debugging Information Format", revision
12330 3, draft 8, dated November 19, 2001. This document was obtained
12333 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
12335 This document is only a draft and is subject to change. (So beware.)
12337 Details regarding the older, non-standard 64-bit format were
12338 determined empirically by examining 64-bit ELF files produced by
12339 the SGI toolchain on an IRIX 6.5 machine.
12341 - Kevin, July 16, 2002
12345 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
12347 LONGEST length
= bfd_get_32 (abfd
, buf
);
12349 if (length
== 0xffffffff)
12351 length
= bfd_get_64 (abfd
, buf
+ 4);
12354 else if (length
== 0)
12356 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
12357 length
= bfd_get_64 (abfd
, buf
);
12368 /* Cover function for read_initial_length.
12369 Returns the length of the object at BUF, and stores the size of the
12370 initial length in *BYTES_READ and stores the size that offsets will be in
12372 If the initial length size is not equivalent to that specified in
12373 CU_HEADER then issue a complaint.
12374 This is useful when reading non-comp-unit headers. */
12377 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
12378 const struct comp_unit_head
*cu_header
,
12379 unsigned int *bytes_read
,
12380 unsigned int *offset_size
)
12382 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
12384 gdb_assert (cu_header
->initial_length_size
== 4
12385 || cu_header
->initial_length_size
== 8
12386 || cu_header
->initial_length_size
== 12);
12388 if (cu_header
->initial_length_size
!= *bytes_read
)
12389 complaint (&symfile_complaints
,
12390 _("intermixed 32-bit and 64-bit DWARF sections"));
12392 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
12396 /* Read an offset from the data stream. The size of the offset is
12397 given by cu_header->offset_size. */
12400 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
12401 unsigned int *bytes_read
)
12403 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
12405 *bytes_read
= cu_header
->offset_size
;
12409 /* Read an offset from the data stream. */
12412 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
12414 LONGEST retval
= 0;
12416 switch (offset_size
)
12419 retval
= bfd_get_32 (abfd
, buf
);
12422 retval
= bfd_get_64 (abfd
, buf
);
12425 internal_error (__FILE__
, __LINE__
,
12426 _("read_offset_1: bad switch [in module %s]"),
12427 bfd_get_filename (abfd
));
12434 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
12436 /* If the size of a host char is 8 bits, we can return a pointer
12437 to the buffer, otherwise we have to copy the data to a buffer
12438 allocated on the temporary obstack. */
12439 gdb_assert (HOST_CHAR_BIT
== 8);
12444 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
12446 /* If the size of a host char is 8 bits, we can return a pointer
12447 to the string, otherwise we have to copy the string to a buffer
12448 allocated on the temporary obstack. */
12449 gdb_assert (HOST_CHAR_BIT
== 8);
12452 *bytes_read_ptr
= 1;
12455 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
12456 return (char *) buf
;
12460 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
12462 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
12463 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
12464 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
12465 bfd_get_filename (abfd
));
12466 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
12467 error (_("DW_FORM_strp pointing outside of "
12468 ".debug_str section [in module %s]"),
12469 bfd_get_filename (abfd
));
12470 gdb_assert (HOST_CHAR_BIT
== 8);
12471 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
12473 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
12477 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
12478 const struct comp_unit_head
*cu_header
,
12479 unsigned int *bytes_read_ptr
)
12481 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
12483 return read_indirect_string_at_offset (abfd
, str_offset
);
12487 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
12490 unsigned int num_read
;
12492 unsigned char byte
;
12500 byte
= bfd_get_8 (abfd
, buf
);
12503 result
|= ((ULONGEST
) (byte
& 127) << shift
);
12504 if ((byte
& 128) == 0)
12510 *bytes_read_ptr
= num_read
;
12515 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
12518 int i
, shift
, num_read
;
12519 unsigned char byte
;
12527 byte
= bfd_get_8 (abfd
, buf
);
12530 result
|= ((LONGEST
) (byte
& 127) << shift
);
12532 if ((byte
& 128) == 0)
12537 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
12538 result
|= -(((LONGEST
) 1) << shift
);
12539 *bytes_read_ptr
= num_read
;
12543 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
12544 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
12545 ADDR_SIZE is the size of addresses from the CU header. */
12548 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
12550 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12551 bfd
*abfd
= objfile
->obfd
;
12552 const gdb_byte
*info_ptr
;
12554 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
12555 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
12556 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
12558 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
12559 error (_("DW_FORM_addr_index pointing outside of "
12560 ".debug_addr section [in module %s]"),
12562 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
12563 + addr_base
+ addr_index
* addr_size
);
12564 if (addr_size
== 4)
12565 return bfd_get_32 (abfd
, info_ptr
);
12567 return bfd_get_64 (abfd
, info_ptr
);
12570 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
12573 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
12575 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
12578 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
12581 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, gdb_byte
*info_ptr
,
12582 unsigned int *bytes_read
)
12584 bfd
*abfd
= cu
->objfile
->obfd
;
12585 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
12587 return read_addr_index (cu
, addr_index
);
12590 /* Data structure to pass results from dwarf2_read_addr_index_reader
12591 back to dwarf2_read_addr_index. */
12593 struct dwarf2_read_addr_index_data
12595 ULONGEST addr_base
;
12599 /* die_reader_func for dwarf2_read_addr_index. */
12602 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
12603 gdb_byte
*info_ptr
,
12604 struct die_info
*comp_unit_die
,
12608 struct dwarf2_cu
*cu
= reader
->cu
;
12609 struct dwarf2_read_addr_index_data
*aidata
=
12610 (struct dwarf2_read_addr_index_data
*) data
;
12612 aidata
->addr_base
= cu
->addr_base
;
12613 aidata
->addr_size
= cu
->header
.addr_size
;
12616 /* Given an index in .debug_addr, fetch the value.
12617 NOTE: This can be called during dwarf expression evaluation,
12618 long after the debug information has been read, and thus per_cu->cu
12619 may no longer exist. */
12622 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
12623 unsigned int addr_index
)
12625 struct objfile
*objfile
= per_cu
->objfile
;
12626 struct dwarf2_cu
*cu
= per_cu
->cu
;
12627 ULONGEST addr_base
;
12630 /* This is intended to be called from outside this file. */
12631 dw2_setup (objfile
);
12633 /* We need addr_base and addr_size.
12634 If we don't have PER_CU->cu, we have to get it.
12635 Nasty, but the alternative is storing the needed info in PER_CU,
12636 which at this point doesn't seem justified: it's not clear how frequently
12637 it would get used and it would increase the size of every PER_CU.
12638 Entry points like dwarf2_per_cu_addr_size do a similar thing
12639 so we're not in uncharted territory here.
12640 Alas we need to be a bit more complicated as addr_base is contained
12643 We don't need to read the entire CU(/TU).
12644 We just need the header and top level die.
12645 IWBN to use the aging mechanism to let us lazily later discard the CU.
12646 See however init_cutu_and_read_dies_simple. */
12650 addr_base
= cu
->addr_base
;
12651 addr_size
= cu
->header
.addr_size
;
12655 struct dwarf2_read_addr_index_data aidata
;
12657 init_cutu_and_read_dies_simple (per_cu
, dwarf2_read_addr_index_reader
,
12659 addr_base
= aidata
.addr_base
;
12660 addr_size
= aidata
.addr_size
;
12663 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
12666 /* Given a DW_AT_str_index, fetch the string. */
12669 read_str_index (const struct die_reader_specs
*reader
,
12670 struct dwarf2_cu
*cu
, ULONGEST str_index
)
12672 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12673 const char *dwo_name
= objfile
->name
;
12674 bfd
*abfd
= objfile
->obfd
;
12675 struct dwo_sections
*sections
= &reader
->dwo_file
->sections
;
12676 gdb_byte
*info_ptr
;
12677 ULONGEST str_offset
;
12679 dwarf2_read_section (objfile
, §ions
->str
);
12680 dwarf2_read_section (objfile
, §ions
->str_offsets
);
12681 if (sections
->str
.buffer
== NULL
)
12682 error (_("DW_FORM_str_index used without .debug_str.dwo section"
12683 " in CU at offset 0x%lx [in module %s]"),
12684 (long) cu
->header
.offset
.sect_off
, dwo_name
);
12685 if (sections
->str_offsets
.buffer
== NULL
)
12686 error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section"
12687 " in CU at offset 0x%lx [in module %s]"),
12688 (long) cu
->header
.offset
.sect_off
, dwo_name
);
12689 if (str_index
* cu
->header
.offset_size
>= sections
->str_offsets
.size
)
12690 error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo"
12691 " section in CU at offset 0x%lx [in module %s]"),
12692 (long) cu
->header
.offset
.sect_off
, dwo_name
);
12693 info_ptr
= (sections
->str_offsets
.buffer
12694 + str_index
* cu
->header
.offset_size
);
12695 if (cu
->header
.offset_size
== 4)
12696 str_offset
= bfd_get_32 (abfd
, info_ptr
);
12698 str_offset
= bfd_get_64 (abfd
, info_ptr
);
12699 if (str_offset
>= sections
->str
.size
)
12700 error (_("Offset from DW_FORM_str_index pointing outside of"
12701 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
12702 (long) cu
->header
.offset
.sect_off
, dwo_name
);
12703 return (char *) (sections
->str
.buffer
+ str_offset
);
12706 /* Return the length of an LEB128 number in BUF. */
12709 leb128_size (const gdb_byte
*buf
)
12711 const gdb_byte
*begin
= buf
;
12717 if ((byte
& 128) == 0)
12718 return buf
- begin
;
12723 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
12730 cu
->language
= language_c
;
12732 case DW_LANG_C_plus_plus
:
12733 cu
->language
= language_cplus
;
12736 cu
->language
= language_d
;
12738 case DW_LANG_Fortran77
:
12739 case DW_LANG_Fortran90
:
12740 case DW_LANG_Fortran95
:
12741 cu
->language
= language_fortran
;
12744 cu
->language
= language_go
;
12746 case DW_LANG_Mips_Assembler
:
12747 cu
->language
= language_asm
;
12750 cu
->language
= language_java
;
12752 case DW_LANG_Ada83
:
12753 case DW_LANG_Ada95
:
12754 cu
->language
= language_ada
;
12756 case DW_LANG_Modula2
:
12757 cu
->language
= language_m2
;
12759 case DW_LANG_Pascal83
:
12760 cu
->language
= language_pascal
;
12763 cu
->language
= language_objc
;
12765 case DW_LANG_Cobol74
:
12766 case DW_LANG_Cobol85
:
12768 cu
->language
= language_minimal
;
12771 cu
->language_defn
= language_def (cu
->language
);
12774 /* Return the named attribute or NULL if not there. */
12776 static struct attribute
*
12777 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
12782 struct attribute
*spec
= NULL
;
12784 for (i
= 0; i
< die
->num_attrs
; ++i
)
12786 if (die
->attrs
[i
].name
== name
)
12787 return &die
->attrs
[i
];
12788 if (die
->attrs
[i
].name
== DW_AT_specification
12789 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
12790 spec
= &die
->attrs
[i
];
12796 die
= follow_die_ref (die
, spec
, &cu
);
12802 /* Return the named attribute or NULL if not there,
12803 but do not follow DW_AT_specification, etc.
12804 This is for use in contexts where we're reading .debug_types dies.
12805 Following DW_AT_specification, DW_AT_abstract_origin will take us
12806 back up the chain, and we want to go down. */
12808 static struct attribute
*
12809 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
12813 for (i
= 0; i
< die
->num_attrs
; ++i
)
12814 if (die
->attrs
[i
].name
== name
)
12815 return &die
->attrs
[i
];
12820 /* Return non-zero iff the attribute NAME is defined for the given DIE,
12821 and holds a non-zero value. This function should only be used for
12822 DW_FORM_flag or DW_FORM_flag_present attributes. */
12825 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
12827 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
12829 return (attr
&& DW_UNSND (attr
));
12833 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
12835 /* A DIE is a declaration if it has a DW_AT_declaration attribute
12836 which value is non-zero. However, we have to be careful with
12837 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
12838 (via dwarf2_flag_true_p) follows this attribute. So we may
12839 end up accidently finding a declaration attribute that belongs
12840 to a different DIE referenced by the specification attribute,
12841 even though the given DIE does not have a declaration attribute. */
12842 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
12843 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
12846 /* Return the die giving the specification for DIE, if there is
12847 one. *SPEC_CU is the CU containing DIE on input, and the CU
12848 containing the return value on output. If there is no
12849 specification, but there is an abstract origin, that is
12852 static struct die_info
*
12853 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
12855 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
12858 if (spec_attr
== NULL
)
12859 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
12861 if (spec_attr
== NULL
)
12864 return follow_die_ref (die
, spec_attr
, spec_cu
);
12867 /* Free the line_header structure *LH, and any arrays and strings it
12869 NOTE: This is also used as a "cleanup" function. */
12872 free_line_header (struct line_header
*lh
)
12874 if (lh
->standard_opcode_lengths
)
12875 xfree (lh
->standard_opcode_lengths
);
12877 /* Remember that all the lh->file_names[i].name pointers are
12878 pointers into debug_line_buffer, and don't need to be freed. */
12879 if (lh
->file_names
)
12880 xfree (lh
->file_names
);
12882 /* Similarly for the include directory names. */
12883 if (lh
->include_dirs
)
12884 xfree (lh
->include_dirs
);
12889 /* Add an entry to LH's include directory table. */
12892 add_include_dir (struct line_header
*lh
, char *include_dir
)
12894 /* Grow the array if necessary. */
12895 if (lh
->include_dirs_size
== 0)
12897 lh
->include_dirs_size
= 1; /* for testing */
12898 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
12899 * sizeof (*lh
->include_dirs
));
12901 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
12903 lh
->include_dirs_size
*= 2;
12904 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
12905 (lh
->include_dirs_size
12906 * sizeof (*lh
->include_dirs
)));
12909 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
12912 /* Add an entry to LH's file name table. */
12915 add_file_name (struct line_header
*lh
,
12917 unsigned int dir_index
,
12918 unsigned int mod_time
,
12919 unsigned int length
)
12921 struct file_entry
*fe
;
12923 /* Grow the array if necessary. */
12924 if (lh
->file_names_size
== 0)
12926 lh
->file_names_size
= 1; /* for testing */
12927 lh
->file_names
= xmalloc (lh
->file_names_size
12928 * sizeof (*lh
->file_names
));
12930 else if (lh
->num_file_names
>= lh
->file_names_size
)
12932 lh
->file_names_size
*= 2;
12933 lh
->file_names
= xrealloc (lh
->file_names
,
12934 (lh
->file_names_size
12935 * sizeof (*lh
->file_names
)));
12938 fe
= &lh
->file_names
[lh
->num_file_names
++];
12940 fe
->dir_index
= dir_index
;
12941 fe
->mod_time
= mod_time
;
12942 fe
->length
= length
;
12943 fe
->included_p
= 0;
12947 /* Read the statement program header starting at OFFSET in
12948 .debug_line, or .debug_line.dwo. Return a pointer
12949 to a struct line_header, allocated using xmalloc.
12951 NOTE: the strings in the include directory and file name tables of
12952 the returned object point into the dwarf line section buffer,
12953 and must not be freed. */
12955 static struct line_header
*
12956 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
12958 struct cleanup
*back_to
;
12959 struct line_header
*lh
;
12960 gdb_byte
*line_ptr
;
12961 unsigned int bytes_read
, offset_size
;
12963 char *cur_dir
, *cur_file
;
12964 struct dwarf2_section_info
*section
;
12967 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
12969 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
12970 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
12972 section
= &dwarf2_per_objfile
->line
;
12974 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
12975 if (section
->buffer
== NULL
)
12977 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
12978 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
12980 complaint (&symfile_complaints
, _("missing .debug_line section"));
12984 /* We can't do this until we know the section is non-empty.
12985 Only then do we know we have such a section. */
12986 abfd
= section
->asection
->owner
;
12988 /* Make sure that at least there's room for the total_length field.
12989 That could be 12 bytes long, but we're just going to fudge that. */
12990 if (offset
+ 4 >= section
->size
)
12992 dwarf2_statement_list_fits_in_line_number_section_complaint ();
12996 lh
= xmalloc (sizeof (*lh
));
12997 memset (lh
, 0, sizeof (*lh
));
12998 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
13001 line_ptr
= section
->buffer
+ offset
;
13003 /* Read in the header. */
13005 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
13006 &bytes_read
, &offset_size
);
13007 line_ptr
+= bytes_read
;
13008 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
13010 dwarf2_statement_list_fits_in_line_number_section_complaint ();
13013 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
13014 lh
->version
= read_2_bytes (abfd
, line_ptr
);
13016 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
13017 line_ptr
+= offset_size
;
13018 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
13020 if (lh
->version
>= 4)
13022 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
13026 lh
->maximum_ops_per_instruction
= 1;
13028 if (lh
->maximum_ops_per_instruction
== 0)
13030 lh
->maximum_ops_per_instruction
= 1;
13031 complaint (&symfile_complaints
,
13032 _("invalid maximum_ops_per_instruction "
13033 "in `.debug_line' section"));
13036 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
13038 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
13040 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
13042 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
13044 lh
->standard_opcode_lengths
13045 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
13047 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
13048 for (i
= 1; i
< lh
->opcode_base
; ++i
)
13050 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
13054 /* Read directory table. */
13055 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
13057 line_ptr
+= bytes_read
;
13058 add_include_dir (lh
, cur_dir
);
13060 line_ptr
+= bytes_read
;
13062 /* Read file name table. */
13063 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
13065 unsigned int dir_index
, mod_time
, length
;
13067 line_ptr
+= bytes_read
;
13068 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13069 line_ptr
+= bytes_read
;
13070 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13071 line_ptr
+= bytes_read
;
13072 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13073 line_ptr
+= bytes_read
;
13075 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
13077 line_ptr
+= bytes_read
;
13078 lh
->statement_program_start
= line_ptr
;
13080 if (line_ptr
> (section
->buffer
+ section
->size
))
13081 complaint (&symfile_complaints
,
13082 _("line number info header doesn't "
13083 "fit in `.debug_line' section"));
13085 discard_cleanups (back_to
);
13089 /* Subroutine of dwarf_decode_lines to simplify it.
13090 Return the file name of the psymtab for included file FILE_INDEX
13091 in line header LH of PST.
13092 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
13093 If space for the result is malloc'd, it will be freed by a cleanup.
13094 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
13097 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
13098 const struct partial_symtab
*pst
,
13099 const char *comp_dir
)
13101 const struct file_entry fe
= lh
->file_names
[file_index
];
13102 char *include_name
= fe
.name
;
13103 char *include_name_to_compare
= include_name
;
13104 char *dir_name
= NULL
;
13105 const char *pst_filename
;
13106 char *copied_name
= NULL
;
13110 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
13112 if (!IS_ABSOLUTE_PATH (include_name
)
13113 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
13115 /* Avoid creating a duplicate psymtab for PST.
13116 We do this by comparing INCLUDE_NAME and PST_FILENAME.
13117 Before we do the comparison, however, we need to account
13118 for DIR_NAME and COMP_DIR.
13119 First prepend dir_name (if non-NULL). If we still don't
13120 have an absolute path prepend comp_dir (if non-NULL).
13121 However, the directory we record in the include-file's
13122 psymtab does not contain COMP_DIR (to match the
13123 corresponding symtab(s)).
13128 bash$ gcc -g ./hello.c
13129 include_name = "hello.c"
13131 DW_AT_comp_dir = comp_dir = "/tmp"
13132 DW_AT_name = "./hello.c" */
13134 if (dir_name
!= NULL
)
13136 include_name
= concat (dir_name
, SLASH_STRING
,
13137 include_name
, (char *)NULL
);
13138 include_name_to_compare
= include_name
;
13139 make_cleanup (xfree
, include_name
);
13141 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
13143 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
13144 include_name
, (char *)NULL
);
13148 pst_filename
= pst
->filename
;
13149 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
13151 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
13152 pst_filename
, (char *)NULL
);
13153 pst_filename
= copied_name
;
13156 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
13158 if (include_name_to_compare
!= include_name
)
13159 xfree (include_name_to_compare
);
13160 if (copied_name
!= NULL
)
13161 xfree (copied_name
);
13165 return include_name
;
13168 /* Ignore this record_line request. */
13171 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
13176 /* Subroutine of dwarf_decode_lines to simplify it.
13177 Process the line number information in LH. */
13180 dwarf_decode_lines_1 (struct line_header
*lh
, const char *comp_dir
,
13181 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
13183 gdb_byte
*line_ptr
, *extended_end
;
13184 gdb_byte
*line_end
;
13185 unsigned int bytes_read
, extended_len
;
13186 unsigned char op_code
, extended_op
, adj_opcode
;
13187 CORE_ADDR baseaddr
;
13188 struct objfile
*objfile
= cu
->objfile
;
13189 bfd
*abfd
= objfile
->obfd
;
13190 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13191 const int decode_for_pst_p
= (pst
!= NULL
);
13192 struct subfile
*last_subfile
= NULL
;
13193 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
13196 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13198 line_ptr
= lh
->statement_program_start
;
13199 line_end
= lh
->statement_program_end
;
13201 /* Read the statement sequences until there's nothing left. */
13202 while (line_ptr
< line_end
)
13204 /* state machine registers */
13205 CORE_ADDR address
= 0;
13206 unsigned int file
= 1;
13207 unsigned int line
= 1;
13208 unsigned int column
= 0;
13209 int is_stmt
= lh
->default_is_stmt
;
13210 int basic_block
= 0;
13211 int end_sequence
= 0;
13213 unsigned char op_index
= 0;
13215 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
13217 /* Start a subfile for the current file of the state machine. */
13218 /* lh->include_dirs and lh->file_names are 0-based, but the
13219 directory and file name numbers in the statement program
13221 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
13225 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
13227 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
13230 /* Decode the table. */
13231 while (!end_sequence
)
13233 op_code
= read_1_byte (abfd
, line_ptr
);
13235 if (line_ptr
> line_end
)
13237 dwarf2_debug_line_missing_end_sequence_complaint ();
13241 if (op_code
>= lh
->opcode_base
)
13243 /* Special operand. */
13244 adj_opcode
= op_code
- lh
->opcode_base
;
13245 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
13246 / lh
->maximum_ops_per_instruction
)
13247 * lh
->minimum_instruction_length
);
13248 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
13249 % lh
->maximum_ops_per_instruction
);
13250 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
13251 if (lh
->num_file_names
< file
|| file
== 0)
13252 dwarf2_debug_line_missing_file_complaint ();
13253 /* For now we ignore lines not starting on an
13254 instruction boundary. */
13255 else if (op_index
== 0)
13257 lh
->file_names
[file
- 1].included_p
= 1;
13258 if (!decode_for_pst_p
&& is_stmt
)
13260 if (last_subfile
!= current_subfile
)
13262 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
13264 (*p_record_line
) (last_subfile
, 0, addr
);
13265 last_subfile
= current_subfile
;
13267 /* Append row to matrix using current values. */
13268 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
13269 (*p_record_line
) (current_subfile
, line
, addr
);
13274 else switch (op_code
)
13276 case DW_LNS_extended_op
:
13277 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
13279 line_ptr
+= bytes_read
;
13280 extended_end
= line_ptr
+ extended_len
;
13281 extended_op
= read_1_byte (abfd
, line_ptr
);
13283 switch (extended_op
)
13285 case DW_LNE_end_sequence
:
13286 p_record_line
= record_line
;
13289 case DW_LNE_set_address
:
13290 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
13292 if (address
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
13294 /* This line table is for a function which has been
13295 GCd by the linker. Ignore it. PR gdb/12528 */
13298 = line_ptr
- dwarf2_per_objfile
->line
.buffer
;
13300 complaint (&symfile_complaints
,
13301 _(".debug_line address at offset 0x%lx is 0 "
13303 line_offset
, objfile
->name
);
13304 p_record_line
= noop_record_line
;
13308 line_ptr
+= bytes_read
;
13309 address
+= baseaddr
;
13311 case DW_LNE_define_file
:
13314 unsigned int dir_index
, mod_time
, length
;
13316 cur_file
= read_direct_string (abfd
, line_ptr
,
13318 line_ptr
+= bytes_read
;
13320 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13321 line_ptr
+= bytes_read
;
13323 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13324 line_ptr
+= bytes_read
;
13326 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13327 line_ptr
+= bytes_read
;
13328 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
13331 case DW_LNE_set_discriminator
:
13332 /* The discriminator is not interesting to the debugger;
13334 line_ptr
= extended_end
;
13337 complaint (&symfile_complaints
,
13338 _("mangled .debug_line section"));
13341 /* Make sure that we parsed the extended op correctly. If e.g.
13342 we expected a different address size than the producer used,
13343 we may have read the wrong number of bytes. */
13344 if (line_ptr
!= extended_end
)
13346 complaint (&symfile_complaints
,
13347 _("mangled .debug_line section"));
13352 if (lh
->num_file_names
< file
|| file
== 0)
13353 dwarf2_debug_line_missing_file_complaint ();
13356 lh
->file_names
[file
- 1].included_p
= 1;
13357 if (!decode_for_pst_p
&& is_stmt
)
13359 if (last_subfile
!= current_subfile
)
13361 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
13363 (*p_record_line
) (last_subfile
, 0, addr
);
13364 last_subfile
= current_subfile
;
13366 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
13367 (*p_record_line
) (current_subfile
, line
, addr
);
13372 case DW_LNS_advance_pc
:
13375 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13377 address
+= (((op_index
+ adjust
)
13378 / lh
->maximum_ops_per_instruction
)
13379 * lh
->minimum_instruction_length
);
13380 op_index
= ((op_index
+ adjust
)
13381 % lh
->maximum_ops_per_instruction
);
13382 line_ptr
+= bytes_read
;
13385 case DW_LNS_advance_line
:
13386 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
13387 line_ptr
+= bytes_read
;
13389 case DW_LNS_set_file
:
13391 /* The arrays lh->include_dirs and lh->file_names are
13392 0-based, but the directory and file name numbers in
13393 the statement program are 1-based. */
13394 struct file_entry
*fe
;
13397 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13398 line_ptr
+= bytes_read
;
13399 if (lh
->num_file_names
< file
|| file
== 0)
13400 dwarf2_debug_line_missing_file_complaint ();
13403 fe
= &lh
->file_names
[file
- 1];
13405 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
13406 if (!decode_for_pst_p
)
13408 last_subfile
= current_subfile
;
13409 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
13414 case DW_LNS_set_column
:
13415 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13416 line_ptr
+= bytes_read
;
13418 case DW_LNS_negate_stmt
:
13419 is_stmt
= (!is_stmt
);
13421 case DW_LNS_set_basic_block
:
13424 /* Add to the address register of the state machine the
13425 address increment value corresponding to special opcode
13426 255. I.e., this value is scaled by the minimum
13427 instruction length since special opcode 255 would have
13428 scaled the increment. */
13429 case DW_LNS_const_add_pc
:
13431 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
13433 address
+= (((op_index
+ adjust
)
13434 / lh
->maximum_ops_per_instruction
)
13435 * lh
->minimum_instruction_length
);
13436 op_index
= ((op_index
+ adjust
)
13437 % lh
->maximum_ops_per_instruction
);
13440 case DW_LNS_fixed_advance_pc
:
13441 address
+= read_2_bytes (abfd
, line_ptr
);
13447 /* Unknown standard opcode, ignore it. */
13450 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
13452 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13453 line_ptr
+= bytes_read
;
13458 if (lh
->num_file_names
< file
|| file
== 0)
13459 dwarf2_debug_line_missing_file_complaint ();
13462 lh
->file_names
[file
- 1].included_p
= 1;
13463 if (!decode_for_pst_p
)
13465 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
13466 (*p_record_line
) (current_subfile
, 0, addr
);
13472 /* Decode the Line Number Program (LNP) for the given line_header
13473 structure and CU. The actual information extracted and the type
13474 of structures created from the LNP depends on the value of PST.
13476 1. If PST is NULL, then this procedure uses the data from the program
13477 to create all necessary symbol tables, and their linetables.
13479 2. If PST is not NULL, this procedure reads the program to determine
13480 the list of files included by the unit represented by PST, and
13481 builds all the associated partial symbol tables.
13483 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
13484 It is used for relative paths in the line table.
13485 NOTE: When processing partial symtabs (pst != NULL),
13486 comp_dir == pst->dirname.
13488 NOTE: It is important that psymtabs have the same file name (via strcmp)
13489 as the corresponding symtab. Since COMP_DIR is not used in the name of the
13490 symtab we don't use it in the name of the psymtabs we create.
13491 E.g. expand_line_sal requires this when finding psymtabs to expand.
13492 A good testcase for this is mb-inline.exp. */
13495 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
13496 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
13497 int want_line_info
)
13499 struct objfile
*objfile
= cu
->objfile
;
13500 const int decode_for_pst_p
= (pst
!= NULL
);
13501 struct subfile
*first_subfile
= current_subfile
;
13503 if (want_line_info
)
13504 dwarf_decode_lines_1 (lh
, comp_dir
, cu
, pst
);
13506 if (decode_for_pst_p
)
13510 /* Now that we're done scanning the Line Header Program, we can
13511 create the psymtab of each included file. */
13512 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
13513 if (lh
->file_names
[file_index
].included_p
== 1)
13515 char *include_name
=
13516 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
13517 if (include_name
!= NULL
)
13518 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
13523 /* Make sure a symtab is created for every file, even files
13524 which contain only variables (i.e. no code with associated
13528 for (i
= 0; i
< lh
->num_file_names
; i
++)
13531 struct file_entry
*fe
;
13533 fe
= &lh
->file_names
[i
];
13535 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
13536 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
13538 /* Skip the main file; we don't need it, and it must be
13539 allocated last, so that it will show up before the
13540 non-primary symtabs in the objfile's symtab list. */
13541 if (current_subfile
== first_subfile
)
13544 if (current_subfile
->symtab
== NULL
)
13545 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
13547 fe
->symtab
= current_subfile
->symtab
;
13552 /* Start a subfile for DWARF. FILENAME is the name of the file and
13553 DIRNAME the name of the source directory which contains FILENAME
13554 or NULL if not known. COMP_DIR is the compilation directory for the
13555 linetable's compilation unit or NULL if not known.
13556 This routine tries to keep line numbers from identical absolute and
13557 relative file names in a common subfile.
13559 Using the `list' example from the GDB testsuite, which resides in
13560 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
13561 of /srcdir/list0.c yields the following debugging information for list0.c:
13563 DW_AT_name: /srcdir/list0.c
13564 DW_AT_comp_dir: /compdir
13565 files.files[0].name: list0.h
13566 files.files[0].dir: /srcdir
13567 files.files[1].name: list0.c
13568 files.files[1].dir: /srcdir
13570 The line number information for list0.c has to end up in a single
13571 subfile, so that `break /srcdir/list0.c:1' works as expected.
13572 start_subfile will ensure that this happens provided that we pass the
13573 concatenation of files.files[1].dir and files.files[1].name as the
13577 dwarf2_start_subfile (char *filename
, const char *dirname
,
13578 const char *comp_dir
)
13582 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
13583 `start_symtab' will always pass the contents of DW_AT_comp_dir as
13584 second argument to start_subfile. To be consistent, we do the
13585 same here. In order not to lose the line information directory,
13586 we concatenate it to the filename when it makes sense.
13587 Note that the Dwarf3 standard says (speaking of filenames in line
13588 information): ``The directory index is ignored for file names
13589 that represent full path names''. Thus ignoring dirname in the
13590 `else' branch below isn't an issue. */
13592 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
13593 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
13595 fullname
= filename
;
13597 start_subfile (fullname
, comp_dir
);
13599 if (fullname
!= filename
)
13604 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
13605 struct dwarf2_cu
*cu
)
13607 struct objfile
*objfile
= cu
->objfile
;
13608 struct comp_unit_head
*cu_header
= &cu
->header
;
13610 /* NOTE drow/2003-01-30: There used to be a comment and some special
13611 code here to turn a symbol with DW_AT_external and a
13612 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
13613 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
13614 with some versions of binutils) where shared libraries could have
13615 relocations against symbols in their debug information - the
13616 minimal symbol would have the right address, but the debug info
13617 would not. It's no longer necessary, because we will explicitly
13618 apply relocations when we read in the debug information now. */
13620 /* A DW_AT_location attribute with no contents indicates that a
13621 variable has been optimized away. */
13622 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
13624 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
13628 /* Handle one degenerate form of location expression specially, to
13629 preserve GDB's previous behavior when section offsets are
13630 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
13631 then mark this symbol as LOC_STATIC. */
13633 if (attr_form_is_block (attr
)
13634 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
13635 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
13636 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
13637 && (DW_BLOCK (attr
)->size
13638 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
13640 unsigned int dummy
;
13642 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
13643 SYMBOL_VALUE_ADDRESS (sym
) =
13644 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
13646 SYMBOL_VALUE_ADDRESS (sym
) =
13647 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
13648 SYMBOL_CLASS (sym
) = LOC_STATIC
;
13649 fixup_symbol_section (sym
, objfile
);
13650 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
13651 SYMBOL_SECTION (sym
));
13655 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
13656 expression evaluator, and use LOC_COMPUTED only when necessary
13657 (i.e. when the value of a register or memory location is
13658 referenced, or a thread-local block, etc.). Then again, it might
13659 not be worthwhile. I'm assuming that it isn't unless performance
13660 or memory numbers show me otherwise. */
13662 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
13663 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
13665 if (SYMBOL_COMPUTED_OPS (sym
) == &dwarf2_loclist_funcs
)
13666 cu
->has_loclist
= 1;
13669 /* Given a pointer to a DWARF information entry, figure out if we need
13670 to make a symbol table entry for it, and if so, create a new entry
13671 and return a pointer to it.
13672 If TYPE is NULL, determine symbol type from the die, otherwise
13673 used the passed type.
13674 If SPACE is not NULL, use it to hold the new symbol. If it is
13675 NULL, allocate a new symbol on the objfile's obstack. */
13677 static struct symbol
*
13678 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
13679 struct symbol
*space
)
13681 struct objfile
*objfile
= cu
->objfile
;
13682 struct symbol
*sym
= NULL
;
13684 struct attribute
*attr
= NULL
;
13685 struct attribute
*attr2
= NULL
;
13686 CORE_ADDR baseaddr
;
13687 struct pending
**list_to_add
= NULL
;
13689 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13691 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13693 name
= dwarf2_name (die
, cu
);
13696 const char *linkagename
;
13697 int suppress_add
= 0;
13702 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
13703 OBJSTAT (objfile
, n_syms
++);
13705 /* Cache this symbol's name and the name's demangled form (if any). */
13706 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
13707 linkagename
= dwarf2_physname (name
, die
, cu
);
13708 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
13710 /* Fortran does not have mangling standard and the mangling does differ
13711 between gfortran, iFort etc. */
13712 if (cu
->language
== language_fortran
13713 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
13714 symbol_set_demangled_name (&(sym
->ginfo
),
13715 (char *) dwarf2_full_name (name
, die
, cu
),
13718 /* Default assumptions.
13719 Use the passed type or decode it from the die. */
13720 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
13721 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
13723 SYMBOL_TYPE (sym
) = type
;
13725 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
13726 attr
= dwarf2_attr (die
,
13727 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
13731 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
13734 attr
= dwarf2_attr (die
,
13735 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
13739 int file_index
= DW_UNSND (attr
);
13741 if (cu
->line_header
== NULL
13742 || file_index
> cu
->line_header
->num_file_names
)
13743 complaint (&symfile_complaints
,
13744 _("file index out of range"));
13745 else if (file_index
> 0)
13747 struct file_entry
*fe
;
13749 fe
= &cu
->line_header
->file_names
[file_index
- 1];
13750 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
13757 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13760 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
13762 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
13763 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
13764 SYMBOL_CLASS (sym
) = LOC_LABEL
;
13765 add_symbol_to_list (sym
, cu
->list_in_scope
);
13767 case DW_TAG_subprogram
:
13768 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
13770 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
13771 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
13772 if ((attr2
&& (DW_UNSND (attr2
) != 0))
13773 || cu
->language
== language_ada
)
13775 /* Subprograms marked external are stored as a global symbol.
13776 Ada subprograms, whether marked external or not, are always
13777 stored as a global symbol, because we want to be able to
13778 access them globally. For instance, we want to be able
13779 to break on a nested subprogram without having to
13780 specify the context. */
13781 list_to_add
= &global_symbols
;
13785 list_to_add
= cu
->list_in_scope
;
13788 case DW_TAG_inlined_subroutine
:
13789 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
13791 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
13792 SYMBOL_INLINED (sym
) = 1;
13793 list_to_add
= cu
->list_in_scope
;
13795 case DW_TAG_template_value_param
:
13797 /* Fall through. */
13798 case DW_TAG_constant
:
13799 case DW_TAG_variable
:
13800 case DW_TAG_member
:
13801 /* Compilation with minimal debug info may result in
13802 variables with missing type entries. Change the
13803 misleading `void' type to something sensible. */
13804 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
13806 = objfile_type (objfile
)->nodebug_data_symbol
;
13808 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
13809 /* In the case of DW_TAG_member, we should only be called for
13810 static const members. */
13811 if (die
->tag
== DW_TAG_member
)
13813 /* dwarf2_add_field uses die_is_declaration,
13814 so we do the same. */
13815 gdb_assert (die_is_declaration (die
, cu
));
13820 dwarf2_const_value (attr
, sym
, cu
);
13821 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
13824 if (attr2
&& (DW_UNSND (attr2
) != 0))
13825 list_to_add
= &global_symbols
;
13827 list_to_add
= cu
->list_in_scope
;
13831 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13834 var_decode_location (attr
, sym
, cu
);
13835 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
13836 if (SYMBOL_CLASS (sym
) == LOC_STATIC
13837 && SYMBOL_VALUE_ADDRESS (sym
) == 0
13838 && !dwarf2_per_objfile
->has_section_at_zero
)
13840 /* When a static variable is eliminated by the linker,
13841 the corresponding debug information is not stripped
13842 out, but the variable address is set to null;
13843 do not add such variables into symbol table. */
13845 else if (attr2
&& (DW_UNSND (attr2
) != 0))
13847 /* Workaround gfortran PR debug/40040 - it uses
13848 DW_AT_location for variables in -fPIC libraries which may
13849 get overriden by other libraries/executable and get
13850 a different address. Resolve it by the minimal symbol
13851 which may come from inferior's executable using copy
13852 relocation. Make this workaround only for gfortran as for
13853 other compilers GDB cannot guess the minimal symbol
13854 Fortran mangling kind. */
13855 if (cu
->language
== language_fortran
&& die
->parent
13856 && die
->parent
->tag
== DW_TAG_module
13858 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
13859 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
13861 /* A variable with DW_AT_external is never static,
13862 but it may be block-scoped. */
13863 list_to_add
= (cu
->list_in_scope
== &file_symbols
13864 ? &global_symbols
: cu
->list_in_scope
);
13867 list_to_add
= cu
->list_in_scope
;
13871 /* We do not know the address of this symbol.
13872 If it is an external symbol and we have type information
13873 for it, enter the symbol as a LOC_UNRESOLVED symbol.
13874 The address of the variable will then be determined from
13875 the minimal symbol table whenever the variable is
13877 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
13878 if (attr2
&& (DW_UNSND (attr2
) != 0)
13879 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
13881 /* A variable with DW_AT_external is never static, but it
13882 may be block-scoped. */
13883 list_to_add
= (cu
->list_in_scope
== &file_symbols
13884 ? &global_symbols
: cu
->list_in_scope
);
13886 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
13888 else if (!die_is_declaration (die
, cu
))
13890 /* Use the default LOC_OPTIMIZED_OUT class. */
13891 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
13893 list_to_add
= cu
->list_in_scope
;
13897 case DW_TAG_formal_parameter
:
13898 /* If we are inside a function, mark this as an argument. If
13899 not, we might be looking at an argument to an inlined function
13900 when we do not have enough information to show inlined frames;
13901 pretend it's a local variable in that case so that the user can
13903 if (context_stack_depth
> 0
13904 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
13905 SYMBOL_IS_ARGUMENT (sym
) = 1;
13906 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13909 var_decode_location (attr
, sym
, cu
);
13911 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
13914 dwarf2_const_value (attr
, sym
, cu
);
13917 list_to_add
= cu
->list_in_scope
;
13919 case DW_TAG_unspecified_parameters
:
13920 /* From varargs functions; gdb doesn't seem to have any
13921 interest in this information, so just ignore it for now.
13924 case DW_TAG_template_type_param
:
13926 /* Fall through. */
13927 case DW_TAG_class_type
:
13928 case DW_TAG_interface_type
:
13929 case DW_TAG_structure_type
:
13930 case DW_TAG_union_type
:
13931 case DW_TAG_set_type
:
13932 case DW_TAG_enumeration_type
:
13933 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
13934 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
13937 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
13938 really ever be static objects: otherwise, if you try
13939 to, say, break of a class's method and you're in a file
13940 which doesn't mention that class, it won't work unless
13941 the check for all static symbols in lookup_symbol_aux
13942 saves you. See the OtherFileClass tests in
13943 gdb.c++/namespace.exp. */
13947 list_to_add
= (cu
->list_in_scope
== &file_symbols
13948 && (cu
->language
== language_cplus
13949 || cu
->language
== language_java
)
13950 ? &global_symbols
: cu
->list_in_scope
);
13952 /* The semantics of C++ state that "struct foo {
13953 ... }" also defines a typedef for "foo". A Java
13954 class declaration also defines a typedef for the
13956 if (cu
->language
== language_cplus
13957 || cu
->language
== language_java
13958 || cu
->language
== language_ada
)
13960 /* The symbol's name is already allocated along
13961 with this objfile, so we don't need to
13962 duplicate it for the type. */
13963 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
13964 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
13969 case DW_TAG_typedef
:
13970 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
13971 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
13972 list_to_add
= cu
->list_in_scope
;
13974 case DW_TAG_base_type
:
13975 case DW_TAG_subrange_type
:
13976 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
13977 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
13978 list_to_add
= cu
->list_in_scope
;
13980 case DW_TAG_enumerator
:
13981 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
13984 dwarf2_const_value (attr
, sym
, cu
);
13987 /* NOTE: carlton/2003-11-10: See comment above in the
13988 DW_TAG_class_type, etc. block. */
13990 list_to_add
= (cu
->list_in_scope
== &file_symbols
13991 && (cu
->language
== language_cplus
13992 || cu
->language
== language_java
)
13993 ? &global_symbols
: cu
->list_in_scope
);
13996 case DW_TAG_namespace
:
13997 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
13998 list_to_add
= &global_symbols
;
14001 /* Not a tag we recognize. Hopefully we aren't processing
14002 trash data, but since we must specifically ignore things
14003 we don't recognize, there is nothing else we should do at
14005 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
14006 dwarf_tag_name (die
->tag
));
14012 sym
->hash_next
= objfile
->template_symbols
;
14013 objfile
->template_symbols
= sym
;
14014 list_to_add
= NULL
;
14017 if (list_to_add
!= NULL
)
14018 add_symbol_to_list (sym
, list_to_add
);
14020 /* For the benefit of old versions of GCC, check for anonymous
14021 namespaces based on the demangled name. */
14022 if (!processing_has_namespace_info
14023 && cu
->language
== language_cplus
)
14024 cp_scan_for_anonymous_namespaces (sym
, objfile
);
14029 /* A wrapper for new_symbol_full that always allocates a new symbol. */
14031 static struct symbol
*
14032 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
14034 return new_symbol_full (die
, type
, cu
, NULL
);
14037 /* Given an attr with a DW_FORM_dataN value in host byte order,
14038 zero-extend it as appropriate for the symbol's type. The DWARF
14039 standard (v4) is not entirely clear about the meaning of using
14040 DW_FORM_dataN for a constant with a signed type, where the type is
14041 wider than the data. The conclusion of a discussion on the DWARF
14042 list was that this is unspecified. We choose to always zero-extend
14043 because that is the interpretation long in use by GCC. */
14046 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
14047 const char *name
, struct obstack
*obstack
,
14048 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
14050 struct objfile
*objfile
= cu
->objfile
;
14051 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
14052 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
14053 LONGEST l
= DW_UNSND (attr
);
14055 if (bits
< sizeof (*value
) * 8)
14057 l
&= ((LONGEST
) 1 << bits
) - 1;
14060 else if (bits
== sizeof (*value
) * 8)
14064 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
14065 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
14072 /* Read a constant value from an attribute. Either set *VALUE, or if
14073 the value does not fit in *VALUE, set *BYTES - either already
14074 allocated on the objfile obstack, or newly allocated on OBSTACK,
14075 or, set *BATON, if we translated the constant to a location
14079 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
14080 const char *name
, struct obstack
*obstack
,
14081 struct dwarf2_cu
*cu
,
14082 LONGEST
*value
, gdb_byte
**bytes
,
14083 struct dwarf2_locexpr_baton
**baton
)
14085 struct objfile
*objfile
= cu
->objfile
;
14086 struct comp_unit_head
*cu_header
= &cu
->header
;
14087 struct dwarf_block
*blk
;
14088 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
14089 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
14095 switch (attr
->form
)
14098 case DW_FORM_GNU_addr_index
:
14102 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
14103 dwarf2_const_value_length_mismatch_complaint (name
,
14104 cu_header
->addr_size
,
14105 TYPE_LENGTH (type
));
14106 /* Symbols of this form are reasonably rare, so we just
14107 piggyback on the existing location code rather than writing
14108 a new implementation of symbol_computed_ops. */
14109 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
14110 sizeof (struct dwarf2_locexpr_baton
));
14111 (*baton
)->per_cu
= cu
->per_cu
;
14112 gdb_assert ((*baton
)->per_cu
);
14114 (*baton
)->size
= 2 + cu_header
->addr_size
;
14115 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
14116 (*baton
)->data
= data
;
14118 data
[0] = DW_OP_addr
;
14119 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
14120 byte_order
, DW_ADDR (attr
));
14121 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
14124 case DW_FORM_string
:
14126 case DW_FORM_GNU_str_index
:
14127 /* DW_STRING is already allocated on the objfile obstack, point
14129 *bytes
= (gdb_byte
*) DW_STRING (attr
);
14131 case DW_FORM_block1
:
14132 case DW_FORM_block2
:
14133 case DW_FORM_block4
:
14134 case DW_FORM_block
:
14135 case DW_FORM_exprloc
:
14136 blk
= DW_BLOCK (attr
);
14137 if (TYPE_LENGTH (type
) != blk
->size
)
14138 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
14139 TYPE_LENGTH (type
));
14140 *bytes
= blk
->data
;
14143 /* The DW_AT_const_value attributes are supposed to carry the
14144 symbol's value "represented as it would be on the target
14145 architecture." By the time we get here, it's already been
14146 converted to host endianness, so we just need to sign- or
14147 zero-extend it as appropriate. */
14148 case DW_FORM_data1
:
14149 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
14150 obstack
, cu
, value
, 8);
14152 case DW_FORM_data2
:
14153 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
14154 obstack
, cu
, value
, 16);
14156 case DW_FORM_data4
:
14157 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
14158 obstack
, cu
, value
, 32);
14160 case DW_FORM_data8
:
14161 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
14162 obstack
, cu
, value
, 64);
14165 case DW_FORM_sdata
:
14166 *value
= DW_SND (attr
);
14169 case DW_FORM_udata
:
14170 *value
= DW_UNSND (attr
);
14174 complaint (&symfile_complaints
,
14175 _("unsupported const value attribute form: '%s'"),
14176 dwarf_form_name (attr
->form
));
14183 /* Copy constant value from an attribute to a symbol. */
14186 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
14187 struct dwarf2_cu
*cu
)
14189 struct objfile
*objfile
= cu
->objfile
;
14190 struct comp_unit_head
*cu_header
= &cu
->header
;
14193 struct dwarf2_locexpr_baton
*baton
;
14195 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
14196 SYMBOL_PRINT_NAME (sym
),
14197 &objfile
->objfile_obstack
, cu
,
14198 &value
, &bytes
, &baton
);
14202 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
14203 SYMBOL_LOCATION_BATON (sym
) = baton
;
14204 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
14206 else if (bytes
!= NULL
)
14208 SYMBOL_VALUE_BYTES (sym
) = bytes
;
14209 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
14213 SYMBOL_VALUE (sym
) = value
;
14214 SYMBOL_CLASS (sym
) = LOC_CONST
;
14218 /* Return the type of the die in question using its DW_AT_type attribute. */
14220 static struct type
*
14221 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14223 struct attribute
*type_attr
;
14225 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14228 /* A missing DW_AT_type represents a void type. */
14229 return objfile_type (cu
->objfile
)->builtin_void
;
14232 return lookup_die_type (die
, type_attr
, cu
);
14235 /* True iff CU's producer generates GNAT Ada auxiliary information
14236 that allows to find parallel types through that information instead
14237 of having to do expensive parallel lookups by type name. */
14240 need_gnat_info (struct dwarf2_cu
*cu
)
14242 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
14243 of GNAT produces this auxiliary information, without any indication
14244 that it is produced. Part of enhancing the FSF version of GNAT
14245 to produce that information will be to put in place an indicator
14246 that we can use in order to determine whether the descriptive type
14247 info is available or not. One suggestion that has been made is
14248 to use a new attribute, attached to the CU die. For now, assume
14249 that the descriptive type info is not available. */
14253 /* Return the auxiliary type of the die in question using its
14254 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
14255 attribute is not present. */
14257 static struct type
*
14258 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14260 struct attribute
*type_attr
;
14262 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
14266 return lookup_die_type (die
, type_attr
, cu
);
14269 /* If DIE has a descriptive_type attribute, then set the TYPE's
14270 descriptive type accordingly. */
14273 set_descriptive_type (struct type
*type
, struct die_info
*die
,
14274 struct dwarf2_cu
*cu
)
14276 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
14278 if (descriptive_type
)
14280 ALLOCATE_GNAT_AUX_TYPE (type
);
14281 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
14285 /* Return the containing type of the die in question using its
14286 DW_AT_containing_type attribute. */
14288 static struct type
*
14289 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14291 struct attribute
*type_attr
;
14293 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
14295 error (_("Dwarf Error: Problem turning containing type into gdb type "
14296 "[in module %s]"), cu
->objfile
->name
);
14298 return lookup_die_type (die
, type_attr
, cu
);
14301 /* Look up the type of DIE in CU using its type attribute ATTR.
14302 If there is no type substitute an error marker. */
14304 static struct type
*
14305 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
14306 struct dwarf2_cu
*cu
)
14308 struct objfile
*objfile
= cu
->objfile
;
14309 struct type
*this_type
;
14311 /* First see if we have it cached. */
14313 if (is_ref_attr (attr
))
14315 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
14317 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
14319 else if (attr
->form
== DW_FORM_ref_sig8
)
14321 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
14323 /* sig_type will be NULL if the signatured type is missing from
14325 if (sig_type
== NULL
)
14326 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
14327 "at 0x%x [in module %s]"),
14328 die
->offset
.sect_off
, objfile
->name
);
14330 gdb_assert (sig_type
->per_cu
.is_debug_types
);
14331 /* If we haven't filled in type_offset_in_section yet, then we
14332 haven't read the type in yet. */
14334 if (sig_type
->type_offset_in_section
.sect_off
!= 0)
14337 get_die_type_at_offset (sig_type
->type_offset_in_section
,
14338 &sig_type
->per_cu
);
14343 dump_die_for_error (die
);
14344 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
14345 dwarf_attr_name (attr
->name
), objfile
->name
);
14348 /* If not cached we need to read it in. */
14350 if (this_type
== NULL
)
14352 struct die_info
*type_die
;
14353 struct dwarf2_cu
*type_cu
= cu
;
14355 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
14356 /* If we found the type now, it's probably because the type came
14357 from an inter-CU reference and the type's CU got expanded before
14359 this_type
= get_die_type (type_die
, type_cu
);
14360 if (this_type
== NULL
)
14361 this_type
= read_type_die_1 (type_die
, type_cu
);
14364 /* If we still don't have a type use an error marker. */
14366 if (this_type
== NULL
)
14368 char *message
, *saved
;
14370 /* read_type_die already issued a complaint. */
14371 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
14373 cu
->header
.offset
.sect_off
,
14374 die
->offset
.sect_off
);
14375 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
14376 message
, strlen (message
));
14379 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
14385 /* Return the type in DIE, CU.
14386 Returns NULL for invalid types.
14388 This first does a lookup in the appropriate type_hash table,
14389 and only reads the die in if necessary.
14391 NOTE: This can be called when reading in partial or full symbols. */
14393 static struct type
*
14394 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
14396 struct type
*this_type
;
14398 this_type
= get_die_type (die
, cu
);
14402 return read_type_die_1 (die
, cu
);
14405 /* Read the type in DIE, CU.
14406 Returns NULL for invalid types. */
14408 static struct type
*
14409 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
14411 struct type
*this_type
= NULL
;
14415 case DW_TAG_class_type
:
14416 case DW_TAG_interface_type
:
14417 case DW_TAG_structure_type
:
14418 case DW_TAG_union_type
:
14419 this_type
= read_structure_type (die
, cu
);
14421 case DW_TAG_enumeration_type
:
14422 this_type
= read_enumeration_type (die
, cu
);
14424 case DW_TAG_subprogram
:
14425 case DW_TAG_subroutine_type
:
14426 case DW_TAG_inlined_subroutine
:
14427 this_type
= read_subroutine_type (die
, cu
);
14429 case DW_TAG_array_type
:
14430 this_type
= read_array_type (die
, cu
);
14432 case DW_TAG_set_type
:
14433 this_type
= read_set_type (die
, cu
);
14435 case DW_TAG_pointer_type
:
14436 this_type
= read_tag_pointer_type (die
, cu
);
14438 case DW_TAG_ptr_to_member_type
:
14439 this_type
= read_tag_ptr_to_member_type (die
, cu
);
14441 case DW_TAG_reference_type
:
14442 this_type
= read_tag_reference_type (die
, cu
);
14444 case DW_TAG_const_type
:
14445 this_type
= read_tag_const_type (die
, cu
);
14447 case DW_TAG_volatile_type
:
14448 this_type
= read_tag_volatile_type (die
, cu
);
14450 case DW_TAG_string_type
:
14451 this_type
= read_tag_string_type (die
, cu
);
14453 case DW_TAG_typedef
:
14454 this_type
= read_typedef (die
, cu
);
14456 case DW_TAG_subrange_type
:
14457 this_type
= read_subrange_type (die
, cu
);
14459 case DW_TAG_base_type
:
14460 this_type
= read_base_type (die
, cu
);
14462 case DW_TAG_unspecified_type
:
14463 this_type
= read_unspecified_type (die
, cu
);
14465 case DW_TAG_namespace
:
14466 this_type
= read_namespace_type (die
, cu
);
14468 case DW_TAG_module
:
14469 this_type
= read_module_type (die
, cu
);
14472 complaint (&symfile_complaints
,
14473 _("unexpected tag in read_type_die: '%s'"),
14474 dwarf_tag_name (die
->tag
));
14481 /* See if we can figure out if the class lives in a namespace. We do
14482 this by looking for a member function; its demangled name will
14483 contain namespace info, if there is any.
14484 Return the computed name or NULL.
14485 Space for the result is allocated on the objfile's obstack.
14486 This is the full-die version of guess_partial_die_structure_name.
14487 In this case we know DIE has no useful parent. */
14490 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
14492 struct die_info
*spec_die
;
14493 struct dwarf2_cu
*spec_cu
;
14494 struct die_info
*child
;
14497 spec_die
= die_specification (die
, &spec_cu
);
14498 if (spec_die
!= NULL
)
14504 for (child
= die
->child
;
14506 child
= child
->sibling
)
14508 if (child
->tag
== DW_TAG_subprogram
)
14510 struct attribute
*attr
;
14512 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
14514 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
14518 = language_class_name_from_physname (cu
->language_defn
,
14522 if (actual_name
!= NULL
)
14524 char *die_name
= dwarf2_name (die
, cu
);
14526 if (die_name
!= NULL
14527 && strcmp (die_name
, actual_name
) != 0)
14529 /* Strip off the class name from the full name.
14530 We want the prefix. */
14531 int die_name_len
= strlen (die_name
);
14532 int actual_name_len
= strlen (actual_name
);
14534 /* Test for '::' as a sanity check. */
14535 if (actual_name_len
> die_name_len
+ 2
14536 && actual_name
[actual_name_len
14537 - die_name_len
- 1] == ':')
14539 obsavestring (actual_name
,
14540 actual_name_len
- die_name_len
- 2,
14541 &cu
->objfile
->objfile_obstack
);
14544 xfree (actual_name
);
14553 /* GCC might emit a nameless typedef that has a linkage name. Determine the
14554 prefix part in such case. See
14555 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
14558 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
14560 struct attribute
*attr
;
14563 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
14564 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
14567 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
14568 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
14571 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
14573 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
14574 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
14577 /* dwarf2_name had to be already called. */
14578 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
14580 /* Strip the base name, keep any leading namespaces/classes. */
14581 base
= strrchr (DW_STRING (attr
), ':');
14582 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
14585 return obsavestring (DW_STRING (attr
), &base
[-1] - DW_STRING (attr
),
14586 &cu
->objfile
->objfile_obstack
);
14589 /* Return the name of the namespace/class that DIE is defined within,
14590 or "" if we can't tell. The caller should not xfree the result.
14592 For example, if we're within the method foo() in the following
14602 then determine_prefix on foo's die will return "N::C". */
14604 static const char *
14605 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
14607 struct die_info
*parent
, *spec_die
;
14608 struct dwarf2_cu
*spec_cu
;
14609 struct type
*parent_type
;
14612 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
14613 && cu
->language
!= language_fortran
)
14616 retval
= anonymous_struct_prefix (die
, cu
);
14620 /* We have to be careful in the presence of DW_AT_specification.
14621 For example, with GCC 3.4, given the code
14625 // Definition of N::foo.
14629 then we'll have a tree of DIEs like this:
14631 1: DW_TAG_compile_unit
14632 2: DW_TAG_namespace // N
14633 3: DW_TAG_subprogram // declaration of N::foo
14634 4: DW_TAG_subprogram // definition of N::foo
14635 DW_AT_specification // refers to die #3
14637 Thus, when processing die #4, we have to pretend that we're in
14638 the context of its DW_AT_specification, namely the contex of die
14641 spec_die
= die_specification (die
, &spec_cu
);
14642 if (spec_die
== NULL
)
14643 parent
= die
->parent
;
14646 parent
= spec_die
->parent
;
14650 if (parent
== NULL
)
14652 else if (parent
->building_fullname
)
14655 const char *parent_name
;
14657 /* It has been seen on RealView 2.2 built binaries,
14658 DW_TAG_template_type_param types actually _defined_ as
14659 children of the parent class:
14662 template class <class Enum> Class{};
14663 Class<enum E> class_e;
14665 1: DW_TAG_class_type (Class)
14666 2: DW_TAG_enumeration_type (E)
14667 3: DW_TAG_enumerator (enum1:0)
14668 3: DW_TAG_enumerator (enum2:1)
14670 2: DW_TAG_template_type_param
14671 DW_AT_type DW_FORM_ref_udata (E)
14673 Besides being broken debug info, it can put GDB into an
14674 infinite loop. Consider:
14676 When we're building the full name for Class<E>, we'll start
14677 at Class, and go look over its template type parameters,
14678 finding E. We'll then try to build the full name of E, and
14679 reach here. We're now trying to build the full name of E,
14680 and look over the parent DIE for containing scope. In the
14681 broken case, if we followed the parent DIE of E, we'd again
14682 find Class, and once again go look at its template type
14683 arguments, etc., etc. Simply don't consider such parent die
14684 as source-level parent of this die (it can't be, the language
14685 doesn't allow it), and break the loop here. */
14686 name
= dwarf2_name (die
, cu
);
14687 parent_name
= dwarf2_name (parent
, cu
);
14688 complaint (&symfile_complaints
,
14689 _("template param type '%s' defined within parent '%s'"),
14690 name
? name
: "<unknown>",
14691 parent_name
? parent_name
: "<unknown>");
14695 switch (parent
->tag
)
14697 case DW_TAG_namespace
:
14698 parent_type
= read_type_die (parent
, cu
);
14699 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
14700 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
14701 Work around this problem here. */
14702 if (cu
->language
== language_cplus
14703 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
14705 /* We give a name to even anonymous namespaces. */
14706 return TYPE_TAG_NAME (parent_type
);
14707 case DW_TAG_class_type
:
14708 case DW_TAG_interface_type
:
14709 case DW_TAG_structure_type
:
14710 case DW_TAG_union_type
:
14711 case DW_TAG_module
:
14712 parent_type
= read_type_die (parent
, cu
);
14713 if (TYPE_TAG_NAME (parent_type
) != NULL
)
14714 return TYPE_TAG_NAME (parent_type
);
14716 /* An anonymous structure is only allowed non-static data
14717 members; no typedefs, no member functions, et cetera.
14718 So it does not need a prefix. */
14720 case DW_TAG_compile_unit
:
14721 case DW_TAG_partial_unit
:
14722 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
14723 if (cu
->language
== language_cplus
14724 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
14725 && die
->child
!= NULL
14726 && (die
->tag
== DW_TAG_class_type
14727 || die
->tag
== DW_TAG_structure_type
14728 || die
->tag
== DW_TAG_union_type
))
14730 char *name
= guess_full_die_structure_name (die
, cu
);
14736 return determine_prefix (parent
, cu
);
14740 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
14741 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
14742 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
14743 an obconcat, otherwise allocate storage for the result. The CU argument is
14744 used to determine the language and hence, the appropriate separator. */
14746 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
14749 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
14750 int physname
, struct dwarf2_cu
*cu
)
14752 const char *lead
= "";
14755 if (suffix
== NULL
|| suffix
[0] == '\0'
14756 || prefix
== NULL
|| prefix
[0] == '\0')
14758 else if (cu
->language
== language_java
)
14760 else if (cu
->language
== language_fortran
&& physname
)
14762 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
14763 DW_AT_MIPS_linkage_name is preferred and used instead. */
14771 if (prefix
== NULL
)
14773 if (suffix
== NULL
)
14779 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
14781 strcpy (retval
, lead
);
14782 strcat (retval
, prefix
);
14783 strcat (retval
, sep
);
14784 strcat (retval
, suffix
);
14789 /* We have an obstack. */
14790 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
14794 /* Return sibling of die, NULL if no sibling. */
14796 static struct die_info
*
14797 sibling_die (struct die_info
*die
)
14799 return die
->sibling
;
14802 /* Get name of a die, return NULL if not found. */
14805 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
14806 struct obstack
*obstack
)
14808 if (name
&& cu
->language
== language_cplus
)
14810 char *canon_name
= cp_canonicalize_string (name
);
14812 if (canon_name
!= NULL
)
14814 if (strcmp (canon_name
, name
) != 0)
14815 name
= obsavestring (canon_name
, strlen (canon_name
),
14817 xfree (canon_name
);
14824 /* Get name of a die, return NULL if not found. */
14827 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
14829 struct attribute
*attr
;
14831 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
14832 if ((!attr
|| !DW_STRING (attr
))
14833 && die
->tag
!= DW_TAG_class_type
14834 && die
->tag
!= DW_TAG_interface_type
14835 && die
->tag
!= DW_TAG_structure_type
14836 && die
->tag
!= DW_TAG_union_type
)
14841 case DW_TAG_compile_unit
:
14842 case DW_TAG_partial_unit
:
14843 /* Compilation units have a DW_AT_name that is a filename, not
14844 a source language identifier. */
14845 case DW_TAG_enumeration_type
:
14846 case DW_TAG_enumerator
:
14847 /* These tags always have simple identifiers already; no need
14848 to canonicalize them. */
14849 return DW_STRING (attr
);
14851 case DW_TAG_subprogram
:
14852 /* Java constructors will all be named "<init>", so return
14853 the class name when we see this special case. */
14854 if (cu
->language
== language_java
14855 && DW_STRING (attr
) != NULL
14856 && strcmp (DW_STRING (attr
), "<init>") == 0)
14858 struct dwarf2_cu
*spec_cu
= cu
;
14859 struct die_info
*spec_die
;
14861 /* GCJ will output '<init>' for Java constructor names.
14862 For this special case, return the name of the parent class. */
14864 /* GCJ may output suprogram DIEs with AT_specification set.
14865 If so, use the name of the specified DIE. */
14866 spec_die
= die_specification (die
, &spec_cu
);
14867 if (spec_die
!= NULL
)
14868 return dwarf2_name (spec_die
, spec_cu
);
14873 if (die
->tag
== DW_TAG_class_type
)
14874 return dwarf2_name (die
, cu
);
14876 while (die
->tag
!= DW_TAG_compile_unit
14877 && die
->tag
!= DW_TAG_partial_unit
);
14881 case DW_TAG_class_type
:
14882 case DW_TAG_interface_type
:
14883 case DW_TAG_structure_type
:
14884 case DW_TAG_union_type
:
14885 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
14886 structures or unions. These were of the form "._%d" in GCC 4.1,
14887 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
14888 and GCC 4.4. We work around this problem by ignoring these. */
14889 if (attr
&& DW_STRING (attr
)
14890 && (strncmp (DW_STRING (attr
), "._", 2) == 0
14891 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
14894 /* GCC might emit a nameless typedef that has a linkage name. See
14895 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
14896 if (!attr
|| DW_STRING (attr
) == NULL
)
14898 char *demangled
= NULL
;
14900 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
14902 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
14904 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
14907 /* Avoid demangling DW_STRING (attr) the second time on a second
14908 call for the same DIE. */
14909 if (!DW_STRING_IS_CANONICAL (attr
))
14910 demangled
= cplus_demangle (DW_STRING (attr
), DMGL_TYPES
);
14916 /* FIXME: we already did this for the partial symbol... */
14917 DW_STRING (attr
) = obsavestring (demangled
, strlen (demangled
),
14918 &cu
->objfile
->objfile_obstack
);
14919 DW_STRING_IS_CANONICAL (attr
) = 1;
14922 /* Strip any leading namespaces/classes, keep only the base name.
14923 DW_AT_name for named DIEs does not contain the prefixes. */
14924 base
= strrchr (DW_STRING (attr
), ':');
14925 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
14928 return DW_STRING (attr
);
14937 if (!DW_STRING_IS_CANONICAL (attr
))
14940 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
14941 &cu
->objfile
->objfile_obstack
);
14942 DW_STRING_IS_CANONICAL (attr
) = 1;
14944 return DW_STRING (attr
);
14947 /* Return the die that this die in an extension of, or NULL if there
14948 is none. *EXT_CU is the CU containing DIE on input, and the CU
14949 containing the return value on output. */
14951 static struct die_info
*
14952 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
14954 struct attribute
*attr
;
14956 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
14960 return follow_die_ref (die
, attr
, ext_cu
);
14963 /* Convert a DIE tag into its string name. */
14965 static const char *
14966 dwarf_tag_name (unsigned tag
)
14968 const char *name
= get_DW_TAG_name (tag
);
14971 return "DW_TAG_<unknown>";
14976 /* Convert a DWARF attribute code into its string name. */
14978 static const char *
14979 dwarf_attr_name (unsigned attr
)
14983 #ifdef MIPS /* collides with DW_AT_HP_block_index */
14984 if (attr
== DW_AT_MIPS_fde
)
14985 return "DW_AT_MIPS_fde";
14987 if (attr
== DW_AT_HP_block_index
)
14988 return "DW_AT_HP_block_index";
14991 name
= get_DW_AT_name (attr
);
14994 return "DW_AT_<unknown>";
14999 /* Convert a DWARF value form code into its string name. */
15001 static const char *
15002 dwarf_form_name (unsigned form
)
15004 const char *name
= get_DW_FORM_name (form
);
15007 return "DW_FORM_<unknown>";
15013 dwarf_bool_name (unsigned mybool
)
15021 /* Convert a DWARF type code into its string name. */
15023 static const char *
15024 dwarf_type_encoding_name (unsigned enc
)
15026 const char *name
= get_DW_ATE_name (enc
);
15029 return "DW_ATE_<unknown>";
15035 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
15039 print_spaces (indent
, f
);
15040 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
15041 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
15043 if (die
->parent
!= NULL
)
15045 print_spaces (indent
, f
);
15046 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
15047 die
->parent
->offset
.sect_off
);
15050 print_spaces (indent
, f
);
15051 fprintf_unfiltered (f
, " has children: %s\n",
15052 dwarf_bool_name (die
->child
!= NULL
));
15054 print_spaces (indent
, f
);
15055 fprintf_unfiltered (f
, " attributes:\n");
15057 for (i
= 0; i
< die
->num_attrs
; ++i
)
15059 print_spaces (indent
, f
);
15060 fprintf_unfiltered (f
, " %s (%s) ",
15061 dwarf_attr_name (die
->attrs
[i
].name
),
15062 dwarf_form_name (die
->attrs
[i
].form
));
15064 switch (die
->attrs
[i
].form
)
15067 case DW_FORM_GNU_addr_index
:
15068 fprintf_unfiltered (f
, "address: ");
15069 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
15071 case DW_FORM_block2
:
15072 case DW_FORM_block4
:
15073 case DW_FORM_block
:
15074 case DW_FORM_block1
:
15075 fprintf_unfiltered (f
, "block: size %d",
15076 DW_BLOCK (&die
->attrs
[i
])->size
);
15078 case DW_FORM_exprloc
:
15079 fprintf_unfiltered (f
, "expression: size %u",
15080 DW_BLOCK (&die
->attrs
[i
])->size
);
15082 case DW_FORM_ref_addr
:
15083 fprintf_unfiltered (f
, "ref address: ");
15084 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
15090 case DW_FORM_ref_udata
:
15091 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
15092 (long) (DW_UNSND (&die
->attrs
[i
])));
15094 case DW_FORM_data1
:
15095 case DW_FORM_data2
:
15096 case DW_FORM_data4
:
15097 case DW_FORM_data8
:
15098 case DW_FORM_udata
:
15099 case DW_FORM_sdata
:
15100 fprintf_unfiltered (f
, "constant: %s",
15101 pulongest (DW_UNSND (&die
->attrs
[i
])));
15103 case DW_FORM_sec_offset
:
15104 fprintf_unfiltered (f
, "section offset: %s",
15105 pulongest (DW_UNSND (&die
->attrs
[i
])));
15107 case DW_FORM_ref_sig8
:
15108 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
15109 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
15110 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->per_cu
.offset
.sect_off
);
15112 fprintf_unfiltered (f
, "signatured type, offset: unknown");
15114 case DW_FORM_string
:
15116 case DW_FORM_GNU_str_index
:
15117 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
15118 DW_STRING (&die
->attrs
[i
])
15119 ? DW_STRING (&die
->attrs
[i
]) : "",
15120 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
15123 if (DW_UNSND (&die
->attrs
[i
]))
15124 fprintf_unfiltered (f
, "flag: TRUE");
15126 fprintf_unfiltered (f
, "flag: FALSE");
15128 case DW_FORM_flag_present
:
15129 fprintf_unfiltered (f
, "flag: TRUE");
15131 case DW_FORM_indirect
:
15132 /* The reader will have reduced the indirect form to
15133 the "base form" so this form should not occur. */
15134 fprintf_unfiltered (f
,
15135 "unexpected attribute form: DW_FORM_indirect");
15138 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
15139 die
->attrs
[i
].form
);
15142 fprintf_unfiltered (f
, "\n");
15147 dump_die_for_error (struct die_info
*die
)
15149 dump_die_shallow (gdb_stderr
, 0, die
);
15153 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
15155 int indent
= level
* 4;
15157 gdb_assert (die
!= NULL
);
15159 if (level
>= max_level
)
15162 dump_die_shallow (f
, indent
, die
);
15164 if (die
->child
!= NULL
)
15166 print_spaces (indent
, f
);
15167 fprintf_unfiltered (f
, " Children:");
15168 if (level
+ 1 < max_level
)
15170 fprintf_unfiltered (f
, "\n");
15171 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
15175 fprintf_unfiltered (f
,
15176 " [not printed, max nesting level reached]\n");
15180 if (die
->sibling
!= NULL
&& level
> 0)
15182 dump_die_1 (f
, level
, max_level
, die
->sibling
);
15186 /* This is called from the pdie macro in gdbinit.in.
15187 It's not static so gcc will keep a copy callable from gdb. */
15190 dump_die (struct die_info
*die
, int max_level
)
15192 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
15196 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
15200 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
15206 /* DW_ADDR is always stored already as sect_offset; despite for the forms
15207 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
15210 is_ref_attr (struct attribute
*attr
)
15212 switch (attr
->form
)
15214 case DW_FORM_ref_addr
:
15219 case DW_FORM_ref_udata
:
15226 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
15230 dwarf2_get_ref_die_offset (struct attribute
*attr
)
15232 sect_offset retval
= { DW_UNSND (attr
) };
15234 if (is_ref_attr (attr
))
15237 retval
.sect_off
= 0;
15238 complaint (&symfile_complaints
,
15239 _("unsupported die ref attribute form: '%s'"),
15240 dwarf_form_name (attr
->form
));
15244 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
15245 * the value held by the attribute is not constant. */
15248 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
15250 if (attr
->form
== DW_FORM_sdata
)
15251 return DW_SND (attr
);
15252 else if (attr
->form
== DW_FORM_udata
15253 || attr
->form
== DW_FORM_data1
15254 || attr
->form
== DW_FORM_data2
15255 || attr
->form
== DW_FORM_data4
15256 || attr
->form
== DW_FORM_data8
)
15257 return DW_UNSND (attr
);
15260 complaint (&symfile_complaints
,
15261 _("Attribute value is not a constant (%s)"),
15262 dwarf_form_name (attr
->form
));
15263 return default_value
;
15267 /* Follow reference or signature attribute ATTR of SRC_DIE.
15268 On entry *REF_CU is the CU of SRC_DIE.
15269 On exit *REF_CU is the CU of the result. */
15271 static struct die_info
*
15272 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
15273 struct dwarf2_cu
**ref_cu
)
15275 struct die_info
*die
;
15277 if (is_ref_attr (attr
))
15278 die
= follow_die_ref (src_die
, attr
, ref_cu
);
15279 else if (attr
->form
== DW_FORM_ref_sig8
)
15280 die
= follow_die_sig (src_die
, attr
, ref_cu
);
15283 dump_die_for_error (src_die
);
15284 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
15285 (*ref_cu
)->objfile
->name
);
15291 /* Follow reference OFFSET.
15292 On entry *REF_CU is the CU of the source die referencing OFFSET.
15293 On exit *REF_CU is the CU of the result.
15294 Returns NULL if OFFSET is invalid. */
15296 static struct die_info
*
15297 follow_die_offset (sect_offset offset
, struct dwarf2_cu
**ref_cu
)
15299 struct die_info temp_die
;
15300 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
15302 gdb_assert (cu
->per_cu
!= NULL
);
15306 if (cu
->per_cu
->is_debug_types
)
15308 /* .debug_types CUs cannot reference anything outside their CU.
15309 If they need to, they have to reference a signatured type via
15310 DW_FORM_ref_sig8. */
15311 if (! offset_in_cu_p (&cu
->header
, offset
))
15314 else if (! offset_in_cu_p (&cu
->header
, offset
))
15316 struct dwarf2_per_cu_data
*per_cu
;
15318 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
15320 /* If necessary, add it to the queue and load its DIEs. */
15321 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
15322 load_full_comp_unit (per_cu
, cu
->language
);
15324 target_cu
= per_cu
->cu
;
15326 else if (cu
->dies
== NULL
)
15328 /* We're loading full DIEs during partial symbol reading. */
15329 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
15330 load_full_comp_unit (cu
->per_cu
, language_minimal
);
15333 *ref_cu
= target_cu
;
15334 temp_die
.offset
= offset
;
15335 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
15338 /* Follow reference attribute ATTR of SRC_DIE.
15339 On entry *REF_CU is the CU of SRC_DIE.
15340 On exit *REF_CU is the CU of the result. */
15342 static struct die_info
*
15343 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
15344 struct dwarf2_cu
**ref_cu
)
15346 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
15347 struct dwarf2_cu
*cu
= *ref_cu
;
15348 struct die_info
*die
;
15350 die
= follow_die_offset (offset
, ref_cu
);
15352 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
15353 "at 0x%x [in module %s]"),
15354 offset
.sect_off
, src_die
->offset
.sect_off
, cu
->objfile
->name
);
15359 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
15360 Returned value is intended for DW_OP_call*. Returned
15361 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
15363 struct dwarf2_locexpr_baton
15364 dwarf2_fetch_die_location_block (cu_offset offset_in_cu
,
15365 struct dwarf2_per_cu_data
*per_cu
,
15366 CORE_ADDR (*get_frame_pc
) (void *baton
),
15369 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
15370 struct dwarf2_cu
*cu
;
15371 struct die_info
*die
;
15372 struct attribute
*attr
;
15373 struct dwarf2_locexpr_baton retval
;
15375 dw2_setup (per_cu
->objfile
);
15377 if (per_cu
->cu
== NULL
)
15381 die
= follow_die_offset (offset
, &cu
);
15383 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
15384 offset
.sect_off
, per_cu
->objfile
->name
);
15386 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15389 /* DWARF: "If there is no such attribute, then there is no effect.".
15390 DATA is ignored if SIZE is 0. */
15392 retval
.data
= NULL
;
15395 else if (attr_form_is_section_offset (attr
))
15397 struct dwarf2_loclist_baton loclist_baton
;
15398 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
15401 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
15403 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
15405 retval
.size
= size
;
15409 if (!attr_form_is_block (attr
))
15410 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
15411 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
15412 offset
.sect_off
, per_cu
->objfile
->name
);
15414 retval
.data
= DW_BLOCK (attr
)->data
;
15415 retval
.size
= DW_BLOCK (attr
)->size
;
15417 retval
.per_cu
= cu
->per_cu
;
15419 age_cached_comp_units ();
15424 /* Return the type of the DIE at DIE_OFFSET in the CU named by
15428 dwarf2_get_die_type (cu_offset die_offset
,
15429 struct dwarf2_per_cu_data
*per_cu
)
15431 sect_offset die_offset_sect
;
15433 dw2_setup (per_cu
->objfile
);
15435 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
15436 return get_die_type_at_offset (die_offset_sect
, per_cu
);
15439 /* Follow the signature attribute ATTR in SRC_DIE.
15440 On entry *REF_CU is the CU of SRC_DIE.
15441 On exit *REF_CU is the CU of the result. */
15443 static struct die_info
*
15444 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
15445 struct dwarf2_cu
**ref_cu
)
15447 struct objfile
*objfile
= (*ref_cu
)->objfile
;
15448 struct die_info temp_die
;
15449 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
15450 struct dwarf2_cu
*sig_cu
;
15451 struct die_info
*die
;
15453 /* sig_type will be NULL if the signatured type is missing from
15455 if (sig_type
== NULL
)
15456 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
15457 "at 0x%x [in module %s]"),
15458 src_die
->offset
.sect_off
, objfile
->name
);
15460 /* If necessary, add it to the queue and load its DIEs. */
15462 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
15463 read_signatured_type (sig_type
);
15465 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
15467 sig_cu
= sig_type
->per_cu
.cu
;
15468 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
15469 temp_die
.offset
= sig_type
->type_offset_in_section
;
15470 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
15471 temp_die
.offset
.sect_off
);
15478 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
15479 "from DIE at 0x%x [in module %s]"),
15480 temp_die
.offset
.sect_off
, src_die
->offset
.sect_off
, objfile
->name
);
15483 /* Given an offset of a signatured type, return its signatured_type. */
15485 static struct signatured_type
*
15486 lookup_signatured_type_at_offset (struct objfile
*objfile
,
15487 struct dwarf2_section_info
*section
,
15488 sect_offset offset
)
15490 gdb_byte
*info_ptr
= section
->buffer
+ offset
.sect_off
;
15491 unsigned int length
, initial_length_size
;
15492 unsigned int sig_offset
;
15493 struct signatured_type find_entry
, *sig_type
;
15495 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
15496 sig_offset
= (initial_length_size
15498 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
15499 + 1 /*address_size*/);
15500 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
15501 sig_type
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
15503 /* This is only used to lookup previously recorded types.
15504 If we didn't find it, it's our bug. */
15505 gdb_assert (sig_type
!= NULL
);
15506 gdb_assert (offset
.sect_off
== sig_type
->per_cu
.offset
.sect_off
);
15511 /* Load the DIEs associated with type unit PER_CU into memory. */
15514 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
15516 struct signatured_type
*sig_type
;
15518 /* We have the per_cu, but we need the signatured_type.
15519 Fortunately this is an easy translation. */
15520 gdb_assert (per_cu
->is_debug_types
);
15521 sig_type
= (struct signatured_type
*) per_cu
;
15523 gdb_assert (per_cu
->cu
== NULL
);
15525 read_signatured_type (sig_type
);
15527 gdb_assert (per_cu
->cu
!= NULL
);
15530 /* die_reader_func for read_signatured_type.
15531 This is identical to load_full_comp_unit_reader,
15532 but is kept separate for now. */
15535 read_signatured_type_reader (const struct die_reader_specs
*reader
,
15536 gdb_byte
*info_ptr
,
15537 struct die_info
*comp_unit_die
,
15541 struct dwarf2_cu
*cu
= reader
->cu
;
15543 gdb_assert (cu
->die_hash
== NULL
);
15545 htab_create_alloc_ex (cu
->header
.length
/ 12,
15549 &cu
->comp_unit_obstack
,
15550 hashtab_obstack_allocate
,
15551 dummy_obstack_deallocate
);
15554 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
15555 &info_ptr
, comp_unit_die
);
15556 cu
->dies
= comp_unit_die
;
15557 /* comp_unit_die is not stored in die_hash, no need. */
15559 /* We try not to read any attributes in this function, because not
15560 all CUs needed for references have been loaded yet, and symbol
15561 table processing isn't initialized. But we have to set the CU language,
15562 or we won't be able to build types correctly.
15563 Similarly, if we do not read the producer, we can not apply
15564 producer-specific interpretation. */
15565 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
15568 /* Read in a signatured type and build its CU and DIEs.
15569 If the type is a stub for the real type in a DWO file,
15570 read in the real type from the DWO file as well. */
15573 read_signatured_type (struct signatured_type
*sig_type
)
15575 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
15577 gdb_assert (per_cu
->is_debug_types
);
15578 gdb_assert (per_cu
->cu
== NULL
);
15580 init_cutu_and_read_dies (per_cu
, 0, 1, read_signatured_type_reader
, NULL
);
15583 /* Decode simple location descriptions.
15584 Given a pointer to a dwarf block that defines a location, compute
15585 the location and return the value.
15587 NOTE drow/2003-11-18: This function is called in two situations
15588 now: for the address of static or global variables (partial symbols
15589 only) and for offsets into structures which are expected to be
15590 (more or less) constant. The partial symbol case should go away,
15591 and only the constant case should remain. That will let this
15592 function complain more accurately. A few special modes are allowed
15593 without complaint for global variables (for instance, global
15594 register values and thread-local values).
15596 A location description containing no operations indicates that the
15597 object is optimized out. The return value is 0 for that case.
15598 FIXME drow/2003-11-16: No callers check for this case any more; soon all
15599 callers will only want a very basic result and this can become a
15602 Note that stack[0] is unused except as a default error return. */
15605 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
15607 struct objfile
*objfile
= cu
->objfile
;
15609 int size
= blk
->size
;
15610 gdb_byte
*data
= blk
->data
;
15611 CORE_ADDR stack
[64];
15613 unsigned int bytes_read
, unsnd
;
15619 stack
[++stacki
] = 0;
15658 stack
[++stacki
] = op
- DW_OP_lit0
;
15693 stack
[++stacki
] = op
- DW_OP_reg0
;
15695 dwarf2_complex_location_expr_complaint ();
15699 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
15701 stack
[++stacki
] = unsnd
;
15703 dwarf2_complex_location_expr_complaint ();
15707 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
15712 case DW_OP_const1u
:
15713 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
15717 case DW_OP_const1s
:
15718 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
15722 case DW_OP_const2u
:
15723 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
15727 case DW_OP_const2s
:
15728 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
15732 case DW_OP_const4u
:
15733 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
15737 case DW_OP_const4s
:
15738 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
15742 case DW_OP_const8u
:
15743 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
15748 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
15754 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
15759 stack
[stacki
+ 1] = stack
[stacki
];
15764 stack
[stacki
- 1] += stack
[stacki
];
15768 case DW_OP_plus_uconst
:
15769 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
15775 stack
[stacki
- 1] -= stack
[stacki
];
15780 /* If we're not the last op, then we definitely can't encode
15781 this using GDB's address_class enum. This is valid for partial
15782 global symbols, although the variable's address will be bogus
15785 dwarf2_complex_location_expr_complaint ();
15788 case DW_OP_GNU_push_tls_address
:
15789 /* The top of the stack has the offset from the beginning
15790 of the thread control block at which the variable is located. */
15791 /* Nothing should follow this operator, so the top of stack would
15793 /* This is valid for partial global symbols, but the variable's
15794 address will be bogus in the psymtab. Make it always at least
15795 non-zero to not look as a variable garbage collected by linker
15796 which have DW_OP_addr 0. */
15798 dwarf2_complex_location_expr_complaint ();
15802 case DW_OP_GNU_uninit
:
15805 case DW_OP_GNU_addr_index
:
15806 case DW_OP_GNU_const_index
:
15807 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
15814 const char *name
= get_DW_OP_name (op
);
15817 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
15820 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
15824 return (stack
[stacki
]);
15827 /* Enforce maximum stack depth of SIZE-1 to avoid writing
15828 outside of the allocated space. Also enforce minimum>0. */
15829 if (stacki
>= ARRAY_SIZE (stack
) - 1)
15831 complaint (&symfile_complaints
,
15832 _("location description stack overflow"));
15838 complaint (&symfile_complaints
,
15839 _("location description stack underflow"));
15843 return (stack
[stacki
]);
15846 /* memory allocation interface */
15848 static struct dwarf_block
*
15849 dwarf_alloc_block (struct dwarf2_cu
*cu
)
15851 struct dwarf_block
*blk
;
15853 blk
= (struct dwarf_block
*)
15854 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
15858 static struct die_info
*
15859 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
15861 struct die_info
*die
;
15862 size_t size
= sizeof (struct die_info
);
15865 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
15867 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
15868 memset (die
, 0, sizeof (struct die_info
));
15873 /* Macro support. */
15875 /* Return the full name of file number I in *LH's file name table.
15876 Use COMP_DIR as the name of the current directory of the
15877 compilation. The result is allocated using xmalloc; the caller is
15878 responsible for freeing it. */
15880 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
15882 /* Is the file number a valid index into the line header's file name
15883 table? Remember that file numbers start with one, not zero. */
15884 if (1 <= file
&& file
<= lh
->num_file_names
)
15886 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
15888 if (IS_ABSOLUTE_PATH (fe
->name
))
15889 return xstrdup (fe
->name
);
15897 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15903 dir_len
= strlen (dir
);
15904 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
15905 strcpy (full_name
, dir
);
15906 full_name
[dir_len
] = '/';
15907 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
15911 return xstrdup (fe
->name
);
15916 /* The compiler produced a bogus file number. We can at least
15917 record the macro definitions made in the file, even if we
15918 won't be able to find the file by name. */
15919 char fake_name
[80];
15921 sprintf (fake_name
, "<bad macro file number %d>", file
);
15923 complaint (&symfile_complaints
,
15924 _("bad file number in macro information (%d)"),
15927 return xstrdup (fake_name
);
15932 static struct macro_source_file
*
15933 macro_start_file (int file
, int line
,
15934 struct macro_source_file
*current_file
,
15935 const char *comp_dir
,
15936 struct line_header
*lh
, struct objfile
*objfile
)
15938 /* The full name of this source file. */
15939 char *full_name
= file_full_name (file
, lh
, comp_dir
);
15941 /* We don't create a macro table for this compilation unit
15942 at all until we actually get a filename. */
15943 if (! pending_macros
)
15944 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
15945 objfile
->macro_cache
);
15947 if (! current_file
)
15949 /* If we have no current file, then this must be the start_file
15950 directive for the compilation unit's main source file. */
15951 current_file
= macro_set_main (pending_macros
, full_name
);
15952 macro_define_special (pending_macros
);
15955 current_file
= macro_include (current_file
, line
, full_name
);
15959 return current_file
;
15963 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
15964 followed by a null byte. */
15966 copy_string (const char *buf
, int len
)
15968 char *s
= xmalloc (len
+ 1);
15970 memcpy (s
, buf
, len
);
15976 static const char *
15977 consume_improper_spaces (const char *p
, const char *body
)
15981 complaint (&symfile_complaints
,
15982 _("macro definition contains spaces "
15983 "in formal argument list:\n`%s'"),
15995 parse_macro_definition (struct macro_source_file
*file
, int line
,
16000 /* The body string takes one of two forms. For object-like macro
16001 definitions, it should be:
16003 <macro name> " " <definition>
16005 For function-like macro definitions, it should be:
16007 <macro name> "() " <definition>
16009 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
16011 Spaces may appear only where explicitly indicated, and in the
16014 The Dwarf 2 spec says that an object-like macro's name is always
16015 followed by a space, but versions of GCC around March 2002 omit
16016 the space when the macro's definition is the empty string.
16018 The Dwarf 2 spec says that there should be no spaces between the
16019 formal arguments in a function-like macro's formal argument list,
16020 but versions of GCC around March 2002 include spaces after the
16024 /* Find the extent of the macro name. The macro name is terminated
16025 by either a space or null character (for an object-like macro) or
16026 an opening paren (for a function-like macro). */
16027 for (p
= body
; *p
; p
++)
16028 if (*p
== ' ' || *p
== '(')
16031 if (*p
== ' ' || *p
== '\0')
16033 /* It's an object-like macro. */
16034 int name_len
= p
- body
;
16035 char *name
= copy_string (body
, name_len
);
16036 const char *replacement
;
16039 replacement
= body
+ name_len
+ 1;
16042 dwarf2_macro_malformed_definition_complaint (body
);
16043 replacement
= body
+ name_len
;
16046 macro_define_object (file
, line
, name
, replacement
);
16050 else if (*p
== '(')
16052 /* It's a function-like macro. */
16053 char *name
= copy_string (body
, p
- body
);
16056 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
16060 p
= consume_improper_spaces (p
, body
);
16062 /* Parse the formal argument list. */
16063 while (*p
&& *p
!= ')')
16065 /* Find the extent of the current argument name. */
16066 const char *arg_start
= p
;
16068 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
16071 if (! *p
|| p
== arg_start
)
16072 dwarf2_macro_malformed_definition_complaint (body
);
16075 /* Make sure argv has room for the new argument. */
16076 if (argc
>= argv_size
)
16079 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
16082 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
16085 p
= consume_improper_spaces (p
, body
);
16087 /* Consume the comma, if present. */
16092 p
= consume_improper_spaces (p
, body
);
16101 /* Perfectly formed definition, no complaints. */
16102 macro_define_function (file
, line
, name
,
16103 argc
, (const char **) argv
,
16105 else if (*p
== '\0')
16107 /* Complain, but do define it. */
16108 dwarf2_macro_malformed_definition_complaint (body
);
16109 macro_define_function (file
, line
, name
,
16110 argc
, (const char **) argv
,
16114 /* Just complain. */
16115 dwarf2_macro_malformed_definition_complaint (body
);
16118 /* Just complain. */
16119 dwarf2_macro_malformed_definition_complaint (body
);
16125 for (i
= 0; i
< argc
; i
++)
16131 dwarf2_macro_malformed_definition_complaint (body
);
16134 /* Skip some bytes from BYTES according to the form given in FORM.
16135 Returns the new pointer. */
16138 skip_form_bytes (bfd
*abfd
, gdb_byte
*bytes
, gdb_byte
*buffer_end
,
16139 enum dwarf_form form
,
16140 unsigned int offset_size
,
16141 struct dwarf2_section_info
*section
)
16143 unsigned int bytes_read
;
16147 case DW_FORM_data1
:
16152 case DW_FORM_data2
:
16156 case DW_FORM_data4
:
16160 case DW_FORM_data8
:
16164 case DW_FORM_string
:
16165 read_direct_string (abfd
, bytes
, &bytes_read
);
16166 bytes
+= bytes_read
;
16169 case DW_FORM_sec_offset
:
16171 bytes
+= offset_size
;
16174 case DW_FORM_block
:
16175 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
16176 bytes
+= bytes_read
;
16179 case DW_FORM_block1
:
16180 bytes
+= 1 + read_1_byte (abfd
, bytes
);
16182 case DW_FORM_block2
:
16183 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
16185 case DW_FORM_block4
:
16186 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
16189 case DW_FORM_sdata
:
16190 case DW_FORM_udata
:
16191 case DW_FORM_GNU_addr_index
:
16192 case DW_FORM_GNU_str_index
:
16193 bytes
= (gdb_byte
*) gdb_skip_leb128 (bytes
, buffer_end
);
16196 dwarf2_section_buffer_overflow_complaint (section
);
16204 complaint (&symfile_complaints
,
16205 _("invalid form 0x%x in `%s'"),
16207 section
->asection
->name
);
16215 /* A helper for dwarf_decode_macros that handles skipping an unknown
16216 opcode. Returns an updated pointer to the macro data buffer; or,
16217 on error, issues a complaint and returns NULL. */
16220 skip_unknown_opcode (unsigned int opcode
,
16221 gdb_byte
**opcode_definitions
,
16222 gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
16224 unsigned int offset_size
,
16225 struct dwarf2_section_info
*section
)
16227 unsigned int bytes_read
, i
;
16231 if (opcode_definitions
[opcode
] == NULL
)
16233 complaint (&symfile_complaints
,
16234 _("unrecognized DW_MACFINO opcode 0x%x"),
16239 defn
= opcode_definitions
[opcode
];
16240 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
16241 defn
+= bytes_read
;
16243 for (i
= 0; i
< arg
; ++i
)
16245 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
16247 if (mac_ptr
== NULL
)
16249 /* skip_form_bytes already issued the complaint. */
16257 /* A helper function which parses the header of a macro section.
16258 If the macro section is the extended (for now called "GNU") type,
16259 then this updates *OFFSET_SIZE. Returns a pointer to just after
16260 the header, or issues a complaint and returns NULL on error. */
16263 dwarf_parse_macro_header (gdb_byte
**opcode_definitions
,
16266 unsigned int *offset_size
,
16267 int section_is_gnu
)
16269 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
16271 if (section_is_gnu
)
16273 unsigned int version
, flags
;
16275 version
= read_2_bytes (abfd
, mac_ptr
);
16278 complaint (&symfile_complaints
,
16279 _("unrecognized version `%d' in .debug_macro section"),
16285 flags
= read_1_byte (abfd
, mac_ptr
);
16287 *offset_size
= (flags
& 1) ? 8 : 4;
16289 if ((flags
& 2) != 0)
16290 /* We don't need the line table offset. */
16291 mac_ptr
+= *offset_size
;
16293 /* Vendor opcode descriptions. */
16294 if ((flags
& 4) != 0)
16296 unsigned int i
, count
;
16298 count
= read_1_byte (abfd
, mac_ptr
);
16300 for (i
= 0; i
< count
; ++i
)
16302 unsigned int opcode
, bytes_read
;
16305 opcode
= read_1_byte (abfd
, mac_ptr
);
16307 opcode_definitions
[opcode
] = mac_ptr
;
16308 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16309 mac_ptr
+= bytes_read
;
16318 /* A helper for dwarf_decode_macros that handles the GNU extensions,
16319 including DW_MACRO_GNU_transparent_include. */
16322 dwarf_decode_macro_bytes (bfd
*abfd
, gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
16323 struct macro_source_file
*current_file
,
16324 struct line_header
*lh
, char *comp_dir
,
16325 struct dwarf2_section_info
*section
,
16326 int section_is_gnu
,
16327 unsigned int offset_size
,
16328 struct objfile
*objfile
,
16329 htab_t include_hash
)
16331 enum dwarf_macro_record_type macinfo_type
;
16332 int at_commandline
;
16333 gdb_byte
*opcode_definitions
[256];
16335 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
16336 &offset_size
, section_is_gnu
);
16337 if (mac_ptr
== NULL
)
16339 /* We already issued a complaint. */
16343 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
16344 GDB is still reading the definitions from command line. First
16345 DW_MACINFO_start_file will need to be ignored as it was already executed
16346 to create CURRENT_FILE for the main source holding also the command line
16347 definitions. On first met DW_MACINFO_start_file this flag is reset to
16348 normally execute all the remaining DW_MACINFO_start_file macinfos. */
16350 at_commandline
= 1;
16354 /* Do we at least have room for a macinfo type byte? */
16355 if (mac_ptr
>= mac_end
)
16357 dwarf2_section_buffer_overflow_complaint (section
);
16361 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
16364 /* Note that we rely on the fact that the corresponding GNU and
16365 DWARF constants are the same. */
16366 switch (macinfo_type
)
16368 /* A zero macinfo type indicates the end of the macro
16373 case DW_MACRO_GNU_define
:
16374 case DW_MACRO_GNU_undef
:
16375 case DW_MACRO_GNU_define_indirect
:
16376 case DW_MACRO_GNU_undef_indirect
:
16378 unsigned int bytes_read
;
16383 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16384 mac_ptr
+= bytes_read
;
16386 if (macinfo_type
== DW_MACRO_GNU_define
16387 || macinfo_type
== DW_MACRO_GNU_undef
)
16389 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
16390 mac_ptr
+= bytes_read
;
16394 LONGEST str_offset
;
16396 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
16397 mac_ptr
+= offset_size
;
16399 body
= read_indirect_string_at_offset (abfd
, str_offset
);
16402 is_define
= (macinfo_type
== DW_MACRO_GNU_define
16403 || macinfo_type
== DW_MACRO_GNU_define_indirect
);
16404 if (! current_file
)
16406 /* DWARF violation as no main source is present. */
16407 complaint (&symfile_complaints
,
16408 _("debug info with no main source gives macro %s "
16410 is_define
? _("definition") : _("undefinition"),
16414 if ((line
== 0 && !at_commandline
)
16415 || (line
!= 0 && at_commandline
))
16416 complaint (&symfile_complaints
,
16417 _("debug info gives %s macro %s with %s line %d: %s"),
16418 at_commandline
? _("command-line") : _("in-file"),
16419 is_define
? _("definition") : _("undefinition"),
16420 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
16423 parse_macro_definition (current_file
, line
, body
);
16426 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
16427 || macinfo_type
== DW_MACRO_GNU_undef_indirect
);
16428 macro_undef (current_file
, line
, body
);
16433 case DW_MACRO_GNU_start_file
:
16435 unsigned int bytes_read
;
16438 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16439 mac_ptr
+= bytes_read
;
16440 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16441 mac_ptr
+= bytes_read
;
16443 if ((line
== 0 && !at_commandline
)
16444 || (line
!= 0 && at_commandline
))
16445 complaint (&symfile_complaints
,
16446 _("debug info gives source %d included "
16447 "from %s at %s line %d"),
16448 file
, at_commandline
? _("command-line") : _("file"),
16449 line
== 0 ? _("zero") : _("non-zero"), line
);
16451 if (at_commandline
)
16453 /* This DW_MACRO_GNU_start_file was executed in the
16455 at_commandline
= 0;
16458 current_file
= macro_start_file (file
, line
,
16459 current_file
, comp_dir
,
16464 case DW_MACRO_GNU_end_file
:
16465 if (! current_file
)
16466 complaint (&symfile_complaints
,
16467 _("macro debug info has an unmatched "
16468 "`close_file' directive"));
16471 current_file
= current_file
->included_by
;
16472 if (! current_file
)
16474 enum dwarf_macro_record_type next_type
;
16476 /* GCC circa March 2002 doesn't produce the zero
16477 type byte marking the end of the compilation
16478 unit. Complain if it's not there, but exit no
16481 /* Do we at least have room for a macinfo type byte? */
16482 if (mac_ptr
>= mac_end
)
16484 dwarf2_section_buffer_overflow_complaint (section
);
16488 /* We don't increment mac_ptr here, so this is just
16490 next_type
= read_1_byte (abfd
, mac_ptr
);
16491 if (next_type
!= 0)
16492 complaint (&symfile_complaints
,
16493 _("no terminating 0-type entry for "
16494 "macros in `.debug_macinfo' section"));
16501 case DW_MACRO_GNU_transparent_include
:
16506 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
16507 mac_ptr
+= offset_size
;
16509 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
16512 /* This has actually happened; see
16513 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
16514 complaint (&symfile_complaints
,
16515 _("recursive DW_MACRO_GNU_transparent_include in "
16516 ".debug_macro section"));
16522 dwarf_decode_macro_bytes (abfd
,
16523 section
->buffer
+ offset
,
16524 mac_end
, current_file
,
16526 section
, section_is_gnu
,
16527 offset_size
, objfile
, include_hash
);
16529 htab_remove_elt (include_hash
, mac_ptr
);
16534 case DW_MACINFO_vendor_ext
:
16535 if (!section_is_gnu
)
16537 unsigned int bytes_read
;
16540 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16541 mac_ptr
+= bytes_read
;
16542 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
16543 mac_ptr
+= bytes_read
;
16545 /* We don't recognize any vendor extensions. */
16551 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
16552 mac_ptr
, mac_end
, abfd
, offset_size
,
16554 if (mac_ptr
== NULL
)
16558 } while (macinfo_type
!= 0);
16562 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
16563 char *comp_dir
, int section_is_gnu
)
16565 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16566 struct line_header
*lh
= cu
->line_header
;
16568 gdb_byte
*mac_ptr
, *mac_end
;
16569 struct macro_source_file
*current_file
= 0;
16570 enum dwarf_macro_record_type macinfo_type
;
16571 unsigned int offset_size
= cu
->header
.offset_size
;
16572 gdb_byte
*opcode_definitions
[256];
16573 struct cleanup
*cleanup
;
16574 htab_t include_hash
;
16576 struct dwarf2_section_info
*section
;
16577 const char *section_name
;
16579 if (cu
->dwo_unit
!= NULL
)
16581 if (section_is_gnu
)
16583 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
16584 section_name
= ".debug_macro.dwo";
16588 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
16589 section_name
= ".debug_macinfo.dwo";
16594 if (section_is_gnu
)
16596 section
= &dwarf2_per_objfile
->macro
;
16597 section_name
= ".debug_macro";
16601 section
= &dwarf2_per_objfile
->macinfo
;
16602 section_name
= ".debug_macinfo";
16606 dwarf2_read_section (objfile
, section
);
16607 if (section
->buffer
== NULL
)
16609 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
16612 abfd
= section
->asection
->owner
;
16614 /* First pass: Find the name of the base filename.
16615 This filename is needed in order to process all macros whose definition
16616 (or undefinition) comes from the command line. These macros are defined
16617 before the first DW_MACINFO_start_file entry, and yet still need to be
16618 associated to the base file.
16620 To determine the base file name, we scan the macro definitions until we
16621 reach the first DW_MACINFO_start_file entry. We then initialize
16622 CURRENT_FILE accordingly so that any macro definition found before the
16623 first DW_MACINFO_start_file can still be associated to the base file. */
16625 mac_ptr
= section
->buffer
+ offset
;
16626 mac_end
= section
->buffer
+ section
->size
;
16628 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
16629 &offset_size
, section_is_gnu
);
16630 if (mac_ptr
== NULL
)
16632 /* We already issued a complaint. */
16638 /* Do we at least have room for a macinfo type byte? */
16639 if (mac_ptr
>= mac_end
)
16641 /* Complaint is printed during the second pass as GDB will probably
16642 stop the first pass earlier upon finding
16643 DW_MACINFO_start_file. */
16647 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
16650 /* Note that we rely on the fact that the corresponding GNU and
16651 DWARF constants are the same. */
16652 switch (macinfo_type
)
16654 /* A zero macinfo type indicates the end of the macro
16659 case DW_MACRO_GNU_define
:
16660 case DW_MACRO_GNU_undef
:
16661 /* Only skip the data by MAC_PTR. */
16663 unsigned int bytes_read
;
16665 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16666 mac_ptr
+= bytes_read
;
16667 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
16668 mac_ptr
+= bytes_read
;
16672 case DW_MACRO_GNU_start_file
:
16674 unsigned int bytes_read
;
16677 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16678 mac_ptr
+= bytes_read
;
16679 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16680 mac_ptr
+= bytes_read
;
16682 current_file
= macro_start_file (file
, line
, current_file
,
16683 comp_dir
, lh
, objfile
);
16687 case DW_MACRO_GNU_end_file
:
16688 /* No data to skip by MAC_PTR. */
16691 case DW_MACRO_GNU_define_indirect
:
16692 case DW_MACRO_GNU_undef_indirect
:
16694 unsigned int bytes_read
;
16696 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16697 mac_ptr
+= bytes_read
;
16698 mac_ptr
+= offset_size
;
16702 case DW_MACRO_GNU_transparent_include
:
16703 /* Note that, according to the spec, a transparent include
16704 chain cannot call DW_MACRO_GNU_start_file. So, we can just
16705 skip this opcode. */
16706 mac_ptr
+= offset_size
;
16709 case DW_MACINFO_vendor_ext
:
16710 /* Only skip the data by MAC_PTR. */
16711 if (!section_is_gnu
)
16713 unsigned int bytes_read
;
16715 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16716 mac_ptr
+= bytes_read
;
16717 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
16718 mac_ptr
+= bytes_read
;
16723 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
16724 mac_ptr
, mac_end
, abfd
, offset_size
,
16726 if (mac_ptr
== NULL
)
16730 } while (macinfo_type
!= 0 && current_file
== NULL
);
16732 /* Second pass: Process all entries.
16734 Use the AT_COMMAND_LINE flag to determine whether we are still processing
16735 command-line macro definitions/undefinitions. This flag is unset when we
16736 reach the first DW_MACINFO_start_file entry. */
16738 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
16739 NULL
, xcalloc
, xfree
);
16740 cleanup
= make_cleanup_htab_delete (include_hash
);
16741 mac_ptr
= section
->buffer
+ offset
;
16742 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
16744 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
16745 current_file
, lh
, comp_dir
, section
, section_is_gnu
,
16746 offset_size
, objfile
, include_hash
);
16747 do_cleanups (cleanup
);
16750 /* Check if the attribute's form is a DW_FORM_block*
16751 if so return true else false. */
16754 attr_form_is_block (struct attribute
*attr
)
16756 return (attr
== NULL
? 0 :
16757 attr
->form
== DW_FORM_block1
16758 || attr
->form
== DW_FORM_block2
16759 || attr
->form
== DW_FORM_block4
16760 || attr
->form
== DW_FORM_block
16761 || attr
->form
== DW_FORM_exprloc
);
16764 /* Return non-zero if ATTR's value is a section offset --- classes
16765 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
16766 You may use DW_UNSND (attr) to retrieve such offsets.
16768 Section 7.5.4, "Attribute Encodings", explains that no attribute
16769 may have a value that belongs to more than one of these classes; it
16770 would be ambiguous if we did, because we use the same forms for all
16774 attr_form_is_section_offset (struct attribute
*attr
)
16776 return (attr
->form
== DW_FORM_data4
16777 || attr
->form
== DW_FORM_data8
16778 || attr
->form
== DW_FORM_sec_offset
);
16781 /* Return non-zero if ATTR's value falls in the 'constant' class, or
16782 zero otherwise. When this function returns true, you can apply
16783 dwarf2_get_attr_constant_value to it.
16785 However, note that for some attributes you must check
16786 attr_form_is_section_offset before using this test. DW_FORM_data4
16787 and DW_FORM_data8 are members of both the constant class, and of
16788 the classes that contain offsets into other debug sections
16789 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
16790 that, if an attribute's can be either a constant or one of the
16791 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
16792 taken as section offsets, not constants. */
16795 attr_form_is_constant (struct attribute
*attr
)
16797 switch (attr
->form
)
16799 case DW_FORM_sdata
:
16800 case DW_FORM_udata
:
16801 case DW_FORM_data1
:
16802 case DW_FORM_data2
:
16803 case DW_FORM_data4
:
16804 case DW_FORM_data8
:
16811 /* Return the .debug_loc section to use for CU.
16812 For DWO files use .debug_loc.dwo. */
16814 static struct dwarf2_section_info
*
16815 cu_debug_loc_section (struct dwarf2_cu
*cu
)
16818 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
16819 return &dwarf2_per_objfile
->loc
;
16822 /* A helper function that fills in a dwarf2_loclist_baton. */
16825 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
16826 struct dwarf2_loclist_baton
*baton
,
16827 struct attribute
*attr
)
16829 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
16831 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
16833 baton
->per_cu
= cu
->per_cu
;
16834 gdb_assert (baton
->per_cu
);
16835 /* We don't know how long the location list is, but make sure we
16836 don't run off the edge of the section. */
16837 baton
->size
= section
->size
- DW_UNSND (attr
);
16838 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
16839 baton
->base_address
= cu
->base_address
;
16840 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
16844 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
16845 struct dwarf2_cu
*cu
)
16847 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16848 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
16850 if (attr_form_is_section_offset (attr
)
16851 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
16852 the section. If so, fall through to the complaint in the
16854 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
16856 struct dwarf2_loclist_baton
*baton
;
16858 baton
= obstack_alloc (&objfile
->objfile_obstack
,
16859 sizeof (struct dwarf2_loclist_baton
));
16861 fill_in_loclist_baton (cu
, baton
, attr
);
16863 if (cu
->base_known
== 0)
16864 complaint (&symfile_complaints
,
16865 _("Location list used without "
16866 "specifying the CU base address."));
16868 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
16869 SYMBOL_LOCATION_BATON (sym
) = baton
;
16873 struct dwarf2_locexpr_baton
*baton
;
16875 baton
= obstack_alloc (&objfile
->objfile_obstack
,
16876 sizeof (struct dwarf2_locexpr_baton
));
16877 baton
->per_cu
= cu
->per_cu
;
16878 gdb_assert (baton
->per_cu
);
16880 if (attr_form_is_block (attr
))
16882 /* Note that we're just copying the block's data pointer
16883 here, not the actual data. We're still pointing into the
16884 info_buffer for SYM's objfile; right now we never release
16885 that buffer, but when we do clean up properly this may
16887 baton
->size
= DW_BLOCK (attr
)->size
;
16888 baton
->data
= DW_BLOCK (attr
)->data
;
16892 dwarf2_invalid_attrib_class_complaint ("location description",
16893 SYMBOL_NATURAL_NAME (sym
));
16897 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
16898 SYMBOL_LOCATION_BATON (sym
) = baton
;
16902 /* Return the OBJFILE associated with the compilation unit CU. If CU
16903 came from a separate debuginfo file, then the master objfile is
16907 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
16909 struct objfile
*objfile
= per_cu
->objfile
;
16911 /* Return the master objfile, so that we can report and look up the
16912 correct file containing this variable. */
16913 if (objfile
->separate_debug_objfile_backlink
)
16914 objfile
= objfile
->separate_debug_objfile_backlink
;
16919 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
16920 (CU_HEADERP is unused in such case) or prepare a temporary copy at
16921 CU_HEADERP first. */
16923 static const struct comp_unit_head
*
16924 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
16925 struct dwarf2_per_cu_data
*per_cu
)
16927 gdb_byte
*info_ptr
;
16930 return &per_cu
->cu
->header
;
16932 info_ptr
= per_cu
->info_or_types_section
->buffer
+ per_cu
->offset
.sect_off
;
16934 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
16935 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
16940 /* Return the address size given in the compilation unit header for CU. */
16943 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
16945 struct comp_unit_head cu_header_local
;
16946 const struct comp_unit_head
*cu_headerp
;
16948 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
16950 return cu_headerp
->addr_size
;
16953 /* Return the offset size given in the compilation unit header for CU. */
16956 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
16958 struct comp_unit_head cu_header_local
;
16959 const struct comp_unit_head
*cu_headerp
;
16961 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
16963 return cu_headerp
->offset_size
;
16966 /* See its dwarf2loc.h declaration. */
16969 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
16971 struct comp_unit_head cu_header_local
;
16972 const struct comp_unit_head
*cu_headerp
;
16974 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
16976 if (cu_headerp
->version
== 2)
16977 return cu_headerp
->addr_size
;
16979 return cu_headerp
->offset_size
;
16982 /* Return the text offset of the CU. The returned offset comes from
16983 this CU's objfile. If this objfile came from a separate debuginfo
16984 file, then the offset may be different from the corresponding
16985 offset in the parent objfile. */
16988 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
16990 struct objfile
*objfile
= per_cu
->objfile
;
16992 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
16995 /* Locate the .debug_info compilation unit from CU's objfile which contains
16996 the DIE at OFFSET. Raises an error on failure. */
16998 static struct dwarf2_per_cu_data
*
16999 dwarf2_find_containing_comp_unit (sect_offset offset
,
17000 struct objfile
*objfile
)
17002 struct dwarf2_per_cu_data
*this_cu
;
17006 high
= dwarf2_per_objfile
->n_comp_units
- 1;
17009 int mid
= low
+ (high
- low
) / 2;
17011 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
.sect_off
17012 >= offset
.sect_off
)
17017 gdb_assert (low
== high
);
17018 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
.sect_off
17022 error (_("Dwarf Error: could not find partial DIE containing "
17023 "offset 0x%lx [in module %s]"),
17024 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
17026 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
17027 <= offset
.sect_off
);
17028 return dwarf2_per_objfile
->all_comp_units
[low
-1];
17032 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
17033 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
17034 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
17035 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
17036 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
17041 /* Initialize dwarf2_cu CU, owned by PER_CU. */
17044 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
17046 memset (cu
, 0, sizeof (*cu
));
17048 cu
->per_cu
= per_cu
;
17049 cu
->objfile
= per_cu
->objfile
;
17050 obstack_init (&cu
->comp_unit_obstack
);
17053 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
17056 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
17057 enum language pretend_language
)
17059 struct attribute
*attr
;
17061 /* Set the language we're debugging. */
17062 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
17064 set_cu_language (DW_UNSND (attr
), cu
);
17067 cu
->language
= pretend_language
;
17068 cu
->language_defn
= language_def (cu
->language
);
17071 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
17073 cu
->producer
= DW_STRING (attr
);
17076 /* Release one cached compilation unit, CU. We unlink it from the tree
17077 of compilation units, but we don't remove it from the read_in_chain;
17078 the caller is responsible for that.
17079 NOTE: DATA is a void * because this function is also used as a
17080 cleanup routine. */
17083 free_heap_comp_unit (void *data
)
17085 struct dwarf2_cu
*cu
= data
;
17087 gdb_assert (cu
->per_cu
!= NULL
);
17088 cu
->per_cu
->cu
= NULL
;
17091 obstack_free (&cu
->comp_unit_obstack
, NULL
);
17096 /* This cleanup function is passed the address of a dwarf2_cu on the stack
17097 when we're finished with it. We can't free the pointer itself, but be
17098 sure to unlink it from the cache. Also release any associated storage. */
17101 free_stack_comp_unit (void *data
)
17103 struct dwarf2_cu
*cu
= data
;
17105 gdb_assert (cu
->per_cu
!= NULL
);
17106 cu
->per_cu
->cu
= NULL
;
17109 obstack_free (&cu
->comp_unit_obstack
, NULL
);
17110 cu
->partial_dies
= NULL
;
17113 /* Free all cached compilation units. */
17116 free_cached_comp_units (void *data
)
17118 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
17120 per_cu
= dwarf2_per_objfile
->read_in_chain
;
17121 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
17122 while (per_cu
!= NULL
)
17124 struct dwarf2_per_cu_data
*next_cu
;
17126 next_cu
= per_cu
->cu
->read_in_chain
;
17128 free_heap_comp_unit (per_cu
->cu
);
17129 *last_chain
= next_cu
;
17135 /* Increase the age counter on each cached compilation unit, and free
17136 any that are too old. */
17139 age_cached_comp_units (void)
17141 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
17143 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
17144 per_cu
= dwarf2_per_objfile
->read_in_chain
;
17145 while (per_cu
!= NULL
)
17147 per_cu
->cu
->last_used
++;
17148 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
17149 dwarf2_mark (per_cu
->cu
);
17150 per_cu
= per_cu
->cu
->read_in_chain
;
17153 per_cu
= dwarf2_per_objfile
->read_in_chain
;
17154 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
17155 while (per_cu
!= NULL
)
17157 struct dwarf2_per_cu_data
*next_cu
;
17159 next_cu
= per_cu
->cu
->read_in_chain
;
17161 if (!per_cu
->cu
->mark
)
17163 free_heap_comp_unit (per_cu
->cu
);
17164 *last_chain
= next_cu
;
17167 last_chain
= &per_cu
->cu
->read_in_chain
;
17173 /* Remove a single compilation unit from the cache. */
17176 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
17178 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
17180 per_cu
= dwarf2_per_objfile
->read_in_chain
;
17181 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
17182 while (per_cu
!= NULL
)
17184 struct dwarf2_per_cu_data
*next_cu
;
17186 next_cu
= per_cu
->cu
->read_in_chain
;
17188 if (per_cu
== target_per_cu
)
17190 free_heap_comp_unit (per_cu
->cu
);
17192 *last_chain
= next_cu
;
17196 last_chain
= &per_cu
->cu
->read_in_chain
;
17202 /* Release all extra memory associated with OBJFILE. */
17205 dwarf2_free_objfile (struct objfile
*objfile
)
17207 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
17209 if (dwarf2_per_objfile
== NULL
)
17212 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
17213 free_cached_comp_units (NULL
);
17215 if (dwarf2_per_objfile
->quick_file_names_table
)
17216 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
17218 /* Everything else should be on the objfile obstack. */
17221 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
17222 We store these in a hash table separate from the DIEs, and preserve them
17223 when the DIEs are flushed out of cache.
17225 The CU "per_cu" pointer is needed because offset alone is not enough to
17226 uniquely identify the type. A file may have multiple .debug_types sections,
17227 or the type may come from a DWO file. We have to use something in
17228 dwarf2_per_cu_data (or the pointer to it) because we can enter the lookup
17229 routine, get_die_type_at_offset, from outside this file, and thus won't
17230 necessarily have PER_CU->cu. Fortunately, PER_CU is stable for the life
17233 struct dwarf2_per_cu_offset_and_type
17235 const struct dwarf2_per_cu_data
*per_cu
;
17236 sect_offset offset
;
17240 /* Hash function for a dwarf2_per_cu_offset_and_type. */
17243 per_cu_offset_and_type_hash (const void *item
)
17245 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
17247 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
17250 /* Equality function for a dwarf2_per_cu_offset_and_type. */
17253 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
17255 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
17256 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
17258 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
17259 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
17262 /* Set the type associated with DIE to TYPE. Save it in CU's hash
17263 table if necessary. For convenience, return TYPE.
17265 The DIEs reading must have careful ordering to:
17266 * Not cause infite loops trying to read in DIEs as a prerequisite for
17267 reading current DIE.
17268 * Not trying to dereference contents of still incompletely read in types
17269 while reading in other DIEs.
17270 * Enable referencing still incompletely read in types just by a pointer to
17271 the type without accessing its fields.
17273 Therefore caller should follow these rules:
17274 * Try to fetch any prerequisite types we may need to build this DIE type
17275 before building the type and calling set_die_type.
17276 * After building type call set_die_type for current DIE as soon as
17277 possible before fetching more types to complete the current type.
17278 * Make the type as complete as possible before fetching more types. */
17280 static struct type
*
17281 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
17283 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
17284 struct objfile
*objfile
= cu
->objfile
;
17286 /* For Ada types, make sure that the gnat-specific data is always
17287 initialized (if not already set). There are a few types where
17288 we should not be doing so, because the type-specific area is
17289 already used to hold some other piece of info (eg: TYPE_CODE_FLT
17290 where the type-specific area is used to store the floatformat).
17291 But this is not a problem, because the gnat-specific information
17292 is actually not needed for these types. */
17293 if (need_gnat_info (cu
)
17294 && TYPE_CODE (type
) != TYPE_CODE_FUNC
17295 && TYPE_CODE (type
) != TYPE_CODE_FLT
17296 && !HAVE_GNAT_AUX_INFO (type
))
17297 INIT_GNAT_SPECIFIC (type
);
17299 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
17301 dwarf2_per_objfile
->die_type_hash
=
17302 htab_create_alloc_ex (127,
17303 per_cu_offset_and_type_hash
,
17304 per_cu_offset_and_type_eq
,
17306 &objfile
->objfile_obstack
,
17307 hashtab_obstack_allocate
,
17308 dummy_obstack_deallocate
);
17311 ofs
.per_cu
= cu
->per_cu
;
17312 ofs
.offset
= die
->offset
;
17314 slot
= (struct dwarf2_per_cu_offset_and_type
**)
17315 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
17317 complaint (&symfile_complaints
,
17318 _("A problem internal to GDB: DIE 0x%x has type already set"),
17319 die
->offset
.sect_off
);
17320 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
17325 /* Look up the type for the die at OFFSET in the appropriate type_hash
17326 table, or return NULL if the die does not have a saved type. */
17328 static struct type
*
17329 get_die_type_at_offset (sect_offset offset
,
17330 struct dwarf2_per_cu_data
*per_cu
)
17332 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
17334 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
17337 ofs
.per_cu
= per_cu
;
17338 ofs
.offset
= offset
;
17339 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
17346 /* Look up the type for DIE in the appropriate type_hash table,
17347 or return NULL if DIE does not have a saved type. */
17349 static struct type
*
17350 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17352 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
17355 /* Add a dependence relationship from CU to REF_PER_CU. */
17358 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
17359 struct dwarf2_per_cu_data
*ref_per_cu
)
17363 if (cu
->dependencies
== NULL
)
17365 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
17366 NULL
, &cu
->comp_unit_obstack
,
17367 hashtab_obstack_allocate
,
17368 dummy_obstack_deallocate
);
17370 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
17372 *slot
= ref_per_cu
;
17375 /* Subroutine of dwarf2_mark to pass to htab_traverse.
17376 Set the mark field in every compilation unit in the
17377 cache that we must keep because we are keeping CU. */
17380 dwarf2_mark_helper (void **slot
, void *data
)
17382 struct dwarf2_per_cu_data
*per_cu
;
17384 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
17386 /* cu->dependencies references may not yet have been ever read if QUIT aborts
17387 reading of the chain. As such dependencies remain valid it is not much
17388 useful to track and undo them during QUIT cleanups. */
17389 if (per_cu
->cu
== NULL
)
17392 if (per_cu
->cu
->mark
)
17394 per_cu
->cu
->mark
= 1;
17396 if (per_cu
->cu
->dependencies
!= NULL
)
17397 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
17402 /* Set the mark field in CU and in every other compilation unit in the
17403 cache that we must keep because we are keeping CU. */
17406 dwarf2_mark (struct dwarf2_cu
*cu
)
17411 if (cu
->dependencies
!= NULL
)
17412 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
17416 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
17420 per_cu
->cu
->mark
= 0;
17421 per_cu
= per_cu
->cu
->read_in_chain
;
17425 /* Trivial hash function for partial_die_info: the hash value of a DIE
17426 is its offset in .debug_info for this objfile. */
17429 partial_die_hash (const void *item
)
17431 const struct partial_die_info
*part_die
= item
;
17433 return part_die
->offset
.sect_off
;
17436 /* Trivial comparison function for partial_die_info structures: two DIEs
17437 are equal if they have the same offset. */
17440 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
17442 const struct partial_die_info
*part_die_lhs
= item_lhs
;
17443 const struct partial_die_info
*part_die_rhs
= item_rhs
;
17445 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
17448 static struct cmd_list_element
*set_dwarf2_cmdlist
;
17449 static struct cmd_list_element
*show_dwarf2_cmdlist
;
17452 set_dwarf2_cmd (char *args
, int from_tty
)
17454 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
17458 show_dwarf2_cmd (char *args
, int from_tty
)
17460 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
17463 /* If section described by INFO was mmapped, munmap it now. */
17466 munmap_section_buffer (struct dwarf2_section_info
*info
)
17468 if (info
->map_addr
!= NULL
)
17473 res
= munmap (info
->map_addr
, info
->map_len
);
17474 gdb_assert (res
== 0);
17476 /* Without HAVE_MMAP, we should never be here to begin with. */
17477 gdb_assert_not_reached ("no mmap support");
17482 /* munmap debug sections for OBJFILE, if necessary. */
17485 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
17487 struct dwarf2_per_objfile
*data
= d
;
17489 struct dwarf2_section_info
*section
;
17491 /* This is sorted according to the order they're defined in to make it easier
17492 to keep in sync. */
17493 munmap_section_buffer (&data
->info
);
17494 munmap_section_buffer (&data
->abbrev
);
17495 munmap_section_buffer (&data
->line
);
17496 munmap_section_buffer (&data
->loc
);
17497 munmap_section_buffer (&data
->macinfo
);
17498 munmap_section_buffer (&data
->macro
);
17499 munmap_section_buffer (&data
->str
);
17500 munmap_section_buffer (&data
->ranges
);
17501 munmap_section_buffer (&data
->addr
);
17502 munmap_section_buffer (&data
->frame
);
17503 munmap_section_buffer (&data
->eh_frame
);
17504 munmap_section_buffer (&data
->gdb_index
);
17507 VEC_iterate (dwarf2_section_info_def
, data
->types
, ix
, section
);
17509 munmap_section_buffer (section
);
17511 for (ix
= 0; ix
< dwarf2_per_objfile
->n_comp_units
; ++ix
)
17512 VEC_free (dwarf2_per_cu_ptr
,
17513 dwarf2_per_objfile
->all_comp_units
[ix
]->imported_symtabs
);
17515 VEC_free (dwarf2_section_info_def
, data
->types
);
17517 if (data
->dwo_files
)
17518 free_dwo_files (data
->dwo_files
, objfile
);
17522 /* The "save gdb-index" command. */
17524 /* The contents of the hash table we create when building the string
17526 struct strtab_entry
17528 offset_type offset
;
17532 /* Hash function for a strtab_entry.
17534 Function is used only during write_hash_table so no index format backward
17535 compatibility is needed. */
17538 hash_strtab_entry (const void *e
)
17540 const struct strtab_entry
*entry
= e
;
17541 return mapped_index_string_hash (INT_MAX
, entry
->str
);
17544 /* Equality function for a strtab_entry. */
17547 eq_strtab_entry (const void *a
, const void *b
)
17549 const struct strtab_entry
*ea
= a
;
17550 const struct strtab_entry
*eb
= b
;
17551 return !strcmp (ea
->str
, eb
->str
);
17554 /* Create a strtab_entry hash table. */
17557 create_strtab (void)
17559 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
17560 xfree
, xcalloc
, xfree
);
17563 /* Add a string to the constant pool. Return the string's offset in
17567 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
17570 struct strtab_entry entry
;
17571 struct strtab_entry
*result
;
17574 slot
= htab_find_slot (table
, &entry
, INSERT
);
17579 result
= XNEW (struct strtab_entry
);
17580 result
->offset
= obstack_object_size (cpool
);
17582 obstack_grow_str0 (cpool
, str
);
17585 return result
->offset
;
17588 /* An entry in the symbol table. */
17589 struct symtab_index_entry
17591 /* The name of the symbol. */
17593 /* The offset of the name in the constant pool. */
17594 offset_type index_offset
;
17595 /* A sorted vector of the indices of all the CUs that hold an object
17597 VEC (offset_type
) *cu_indices
;
17600 /* The symbol table. This is a power-of-2-sized hash table. */
17601 struct mapped_symtab
17603 offset_type n_elements
;
17605 struct symtab_index_entry
**data
;
17608 /* Hash function for a symtab_index_entry. */
17611 hash_symtab_entry (const void *e
)
17613 const struct symtab_index_entry
*entry
= e
;
17614 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
17615 sizeof (offset_type
) * VEC_length (offset_type
,
17616 entry
->cu_indices
),
17620 /* Equality function for a symtab_index_entry. */
17623 eq_symtab_entry (const void *a
, const void *b
)
17625 const struct symtab_index_entry
*ea
= a
;
17626 const struct symtab_index_entry
*eb
= b
;
17627 int len
= VEC_length (offset_type
, ea
->cu_indices
);
17628 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
17630 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
17631 VEC_address (offset_type
, eb
->cu_indices
),
17632 sizeof (offset_type
) * len
);
17635 /* Destroy a symtab_index_entry. */
17638 delete_symtab_entry (void *p
)
17640 struct symtab_index_entry
*entry
= p
;
17641 VEC_free (offset_type
, entry
->cu_indices
);
17645 /* Create a hash table holding symtab_index_entry objects. */
17648 create_symbol_hash_table (void)
17650 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
17651 delete_symtab_entry
, xcalloc
, xfree
);
17654 /* Create a new mapped symtab object. */
17656 static struct mapped_symtab
*
17657 create_mapped_symtab (void)
17659 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
17660 symtab
->n_elements
= 0;
17661 symtab
->size
= 1024;
17662 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
17666 /* Destroy a mapped_symtab. */
17669 cleanup_mapped_symtab (void *p
)
17671 struct mapped_symtab
*symtab
= p
;
17672 /* The contents of the array are freed when the other hash table is
17674 xfree (symtab
->data
);
17678 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
17681 Function is used only during write_hash_table so no index format backward
17682 compatibility is needed. */
17684 static struct symtab_index_entry
**
17685 find_slot (struct mapped_symtab
*symtab
, const char *name
)
17687 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
17689 index
= hash
& (symtab
->size
- 1);
17690 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
17694 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
17695 return &symtab
->data
[index
];
17696 index
= (index
+ step
) & (symtab
->size
- 1);
17700 /* Expand SYMTAB's hash table. */
17703 hash_expand (struct mapped_symtab
*symtab
)
17705 offset_type old_size
= symtab
->size
;
17707 struct symtab_index_entry
**old_entries
= symtab
->data
;
17710 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
17712 for (i
= 0; i
< old_size
; ++i
)
17714 if (old_entries
[i
])
17716 struct symtab_index_entry
**slot
= find_slot (symtab
,
17717 old_entries
[i
]->name
);
17718 *slot
= old_entries
[i
];
17722 xfree (old_entries
);
17725 /* Add an entry to SYMTAB. NAME is the name of the symbol.
17726 CU_INDEX is the index of the CU in which the symbol appears.
17727 IS_STATIC is one if the symbol is static, otherwise zero (global). */
17730 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
17731 int is_static
, gdb_index_symbol_kind kind
,
17732 offset_type cu_index
)
17734 struct symtab_index_entry
**slot
;
17735 offset_type cu_index_and_attrs
;
17737 ++symtab
->n_elements
;
17738 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
17739 hash_expand (symtab
);
17741 slot
= find_slot (symtab
, name
);
17744 *slot
= XNEW (struct symtab_index_entry
);
17745 (*slot
)->name
= name
;
17746 /* index_offset is set later. */
17747 (*slot
)->cu_indices
= NULL
;
17750 cu_index_and_attrs
= 0;
17751 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
17752 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
17753 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
17755 /* We don't want to record an index value twice as we want to avoid the
17757 We process all global symbols and then all static symbols
17758 (which would allow us to avoid the duplication by only having to check
17759 the last entry pushed), but a symbol could have multiple kinds in one CU.
17760 To keep things simple we don't worry about the duplication here and
17761 sort and uniqufy the list after we've processed all symbols. */
17762 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
17765 /* qsort helper routine for uniquify_cu_indices. */
17768 offset_type_compare (const void *ap
, const void *bp
)
17770 offset_type a
= *(offset_type
*) ap
;
17771 offset_type b
= *(offset_type
*) bp
;
17773 return (a
> b
) - (b
> a
);
17776 /* Sort and remove duplicates of all symbols' cu_indices lists. */
17779 uniquify_cu_indices (struct mapped_symtab
*symtab
)
17783 for (i
= 0; i
< symtab
->size
; ++i
)
17785 struct symtab_index_entry
*entry
= symtab
->data
[i
];
17788 && entry
->cu_indices
!= NULL
)
17790 unsigned int next_to_insert
, next_to_check
;
17791 offset_type last_value
;
17793 qsort (VEC_address (offset_type
, entry
->cu_indices
),
17794 VEC_length (offset_type
, entry
->cu_indices
),
17795 sizeof (offset_type
), offset_type_compare
);
17797 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
17798 next_to_insert
= 1;
17799 for (next_to_check
= 1;
17800 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
17803 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
17806 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
17808 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
17813 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
17818 /* Add a vector of indices to the constant pool. */
17821 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
17822 struct symtab_index_entry
*entry
)
17826 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
17829 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
17830 offset_type val
= MAYBE_SWAP (len
);
17835 entry
->index_offset
= obstack_object_size (cpool
);
17837 obstack_grow (cpool
, &val
, sizeof (val
));
17839 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
17842 val
= MAYBE_SWAP (iter
);
17843 obstack_grow (cpool
, &val
, sizeof (val
));
17848 struct symtab_index_entry
*old_entry
= *slot
;
17849 entry
->index_offset
= old_entry
->index_offset
;
17852 return entry
->index_offset
;
17855 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
17856 constant pool entries going into the obstack CPOOL. */
17859 write_hash_table (struct mapped_symtab
*symtab
,
17860 struct obstack
*output
, struct obstack
*cpool
)
17863 htab_t symbol_hash_table
;
17866 symbol_hash_table
= create_symbol_hash_table ();
17867 str_table
= create_strtab ();
17869 /* We add all the index vectors to the constant pool first, to
17870 ensure alignment is ok. */
17871 for (i
= 0; i
< symtab
->size
; ++i
)
17873 if (symtab
->data
[i
])
17874 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
17877 /* Now write out the hash table. */
17878 for (i
= 0; i
< symtab
->size
; ++i
)
17880 offset_type str_off
, vec_off
;
17882 if (symtab
->data
[i
])
17884 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
17885 vec_off
= symtab
->data
[i
]->index_offset
;
17889 /* While 0 is a valid constant pool index, it is not valid
17890 to have 0 for both offsets. */
17895 str_off
= MAYBE_SWAP (str_off
);
17896 vec_off
= MAYBE_SWAP (vec_off
);
17898 obstack_grow (output
, &str_off
, sizeof (str_off
));
17899 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
17902 htab_delete (str_table
);
17903 htab_delete (symbol_hash_table
);
17906 /* Struct to map psymtab to CU index in the index file. */
17907 struct psymtab_cu_index_map
17909 struct partial_symtab
*psymtab
;
17910 unsigned int cu_index
;
17914 hash_psymtab_cu_index (const void *item
)
17916 const struct psymtab_cu_index_map
*map
= item
;
17918 return htab_hash_pointer (map
->psymtab
);
17922 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
17924 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
17925 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
17927 return lhs
->psymtab
== rhs
->psymtab
;
17930 /* Helper struct for building the address table. */
17931 struct addrmap_index_data
17933 struct objfile
*objfile
;
17934 struct obstack
*addr_obstack
;
17935 htab_t cu_index_htab
;
17937 /* Non-zero if the previous_* fields are valid.
17938 We can't write an entry until we see the next entry (since it is only then
17939 that we know the end of the entry). */
17940 int previous_valid
;
17941 /* Index of the CU in the table of all CUs in the index file. */
17942 unsigned int previous_cu_index
;
17943 /* Start address of the CU. */
17944 CORE_ADDR previous_cu_start
;
17947 /* Write an address entry to OBSTACK. */
17950 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
17951 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
17953 offset_type cu_index_to_write
;
17955 CORE_ADDR baseaddr
;
17957 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17959 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
17960 obstack_grow (obstack
, addr
, 8);
17961 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
17962 obstack_grow (obstack
, addr
, 8);
17963 cu_index_to_write
= MAYBE_SWAP (cu_index
);
17964 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
17967 /* Worker function for traversing an addrmap to build the address table. */
17970 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
17972 struct addrmap_index_data
*data
= datap
;
17973 struct partial_symtab
*pst
= obj
;
17975 if (data
->previous_valid
)
17976 add_address_entry (data
->objfile
, data
->addr_obstack
,
17977 data
->previous_cu_start
, start_addr
,
17978 data
->previous_cu_index
);
17980 data
->previous_cu_start
= start_addr
;
17983 struct psymtab_cu_index_map find_map
, *map
;
17984 find_map
.psymtab
= pst
;
17985 map
= htab_find (data
->cu_index_htab
, &find_map
);
17986 gdb_assert (map
!= NULL
);
17987 data
->previous_cu_index
= map
->cu_index
;
17988 data
->previous_valid
= 1;
17991 data
->previous_valid
= 0;
17996 /* Write OBJFILE's address map to OBSTACK.
17997 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
17998 in the index file. */
18001 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
18002 htab_t cu_index_htab
)
18004 struct addrmap_index_data addrmap_index_data
;
18006 /* When writing the address table, we have to cope with the fact that
18007 the addrmap iterator only provides the start of a region; we have to
18008 wait until the next invocation to get the start of the next region. */
18010 addrmap_index_data
.objfile
= objfile
;
18011 addrmap_index_data
.addr_obstack
= obstack
;
18012 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
18013 addrmap_index_data
.previous_valid
= 0;
18015 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
18016 &addrmap_index_data
);
18018 /* It's highly unlikely the last entry (end address = 0xff...ff)
18019 is valid, but we should still handle it.
18020 The end address is recorded as the start of the next region, but that
18021 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
18023 if (addrmap_index_data
.previous_valid
)
18024 add_address_entry (objfile
, obstack
,
18025 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
18026 addrmap_index_data
.previous_cu_index
);
18029 /* Return the symbol kind of PSYM. */
18031 static gdb_index_symbol_kind
18032 symbol_kind (struct partial_symbol
*psym
)
18034 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
18035 enum address_class aclass
= PSYMBOL_CLASS (psym
);
18043 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
18045 return GDB_INDEX_SYMBOL_KIND_TYPE
;
18047 case LOC_CONST_BYTES
:
18048 case LOC_OPTIMIZED_OUT
:
18050 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
18052 /* Note: It's currently impossible to recognize psyms as enum values
18053 short of reading the type info. For now punt. */
18054 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
18056 /* There are other LOC_FOO values that one might want to classify
18057 as variables, but dwarf2read.c doesn't currently use them. */
18058 return GDB_INDEX_SYMBOL_KIND_OTHER
;
18060 case STRUCT_DOMAIN
:
18061 return GDB_INDEX_SYMBOL_KIND_TYPE
;
18063 return GDB_INDEX_SYMBOL_KIND_OTHER
;
18067 /* Add a list of partial symbols to SYMTAB. */
18070 write_psymbols (struct mapped_symtab
*symtab
,
18072 struct partial_symbol
**psymp
,
18074 offset_type cu_index
,
18077 for (; count
-- > 0; ++psymp
)
18079 struct partial_symbol
*psym
= *psymp
;
18082 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
18083 error (_("Ada is not currently supported by the index"));
18085 /* Only add a given psymbol once. */
18086 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
18089 gdb_index_symbol_kind kind
= symbol_kind (psym
);
18092 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
18093 is_static
, kind
, cu_index
);
18098 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
18099 exception if there is an error. */
18102 write_obstack (FILE *file
, struct obstack
*obstack
)
18104 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
18106 != obstack_object_size (obstack
))
18107 error (_("couldn't data write to file"));
18110 /* Unlink a file if the argument is not NULL. */
18113 unlink_if_set (void *p
)
18115 char **filename
= p
;
18117 unlink (*filename
);
18120 /* A helper struct used when iterating over debug_types. */
18121 struct signatured_type_index_data
18123 struct objfile
*objfile
;
18124 struct mapped_symtab
*symtab
;
18125 struct obstack
*types_list
;
18130 /* A helper function that writes a single signatured_type to an
18134 write_one_signatured_type (void **slot
, void *d
)
18136 struct signatured_type_index_data
*info
= d
;
18137 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
18138 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
18139 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
18142 write_psymbols (info
->symtab
,
18144 info
->objfile
->global_psymbols
.list
18145 + psymtab
->globals_offset
,
18146 psymtab
->n_global_syms
, info
->cu_index
,
18148 write_psymbols (info
->symtab
,
18150 info
->objfile
->static_psymbols
.list
18151 + psymtab
->statics_offset
,
18152 psymtab
->n_static_syms
, info
->cu_index
,
18155 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
18156 entry
->per_cu
.offset
.sect_off
);
18157 obstack_grow (info
->types_list
, val
, 8);
18158 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
18159 entry
->type_offset_in_tu
.cu_off
);
18160 obstack_grow (info
->types_list
, val
, 8);
18161 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
18162 obstack_grow (info
->types_list
, val
, 8);
18169 /* Recurse into all "included" dependencies and write their symbols as
18170 if they appeared in this psymtab. */
18173 recursively_write_psymbols (struct objfile
*objfile
,
18174 struct partial_symtab
*psymtab
,
18175 struct mapped_symtab
*symtab
,
18177 offset_type cu_index
)
18181 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
18182 if (psymtab
->dependencies
[i
]->user
!= NULL
)
18183 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
18184 symtab
, psyms_seen
, cu_index
);
18186 write_psymbols (symtab
,
18188 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
18189 psymtab
->n_global_syms
, cu_index
,
18191 write_psymbols (symtab
,
18193 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
18194 psymtab
->n_static_syms
, cu_index
,
18198 /* Create an index file for OBJFILE in the directory DIR. */
18201 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
18203 struct cleanup
*cleanup
;
18204 char *filename
, *cleanup_filename
;
18205 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
18206 struct obstack cu_list
, types_cu_list
;
18209 struct mapped_symtab
*symtab
;
18210 offset_type val
, size_of_contents
, total_len
;
18213 htab_t cu_index_htab
;
18214 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
18216 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
18219 if (dwarf2_per_objfile
->using_index
)
18220 error (_("Cannot use an index to create the index"));
18222 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
18223 error (_("Cannot make an index when the file has multiple .debug_types sections"));
18225 if (stat (objfile
->name
, &st
) < 0)
18226 perror_with_name (objfile
->name
);
18228 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
18229 INDEX_SUFFIX
, (char *) NULL
);
18230 cleanup
= make_cleanup (xfree
, filename
);
18232 out_file
= fopen (filename
, "wb");
18234 error (_("Can't open `%s' for writing"), filename
);
18236 cleanup_filename
= filename
;
18237 make_cleanup (unlink_if_set
, &cleanup_filename
);
18239 symtab
= create_mapped_symtab ();
18240 make_cleanup (cleanup_mapped_symtab
, symtab
);
18242 obstack_init (&addr_obstack
);
18243 make_cleanup_obstack_free (&addr_obstack
);
18245 obstack_init (&cu_list
);
18246 make_cleanup_obstack_free (&cu_list
);
18248 obstack_init (&types_cu_list
);
18249 make_cleanup_obstack_free (&types_cu_list
);
18251 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
18252 NULL
, xcalloc
, xfree
);
18253 make_cleanup_htab_delete (psyms_seen
);
18255 /* While we're scanning CU's create a table that maps a psymtab pointer
18256 (which is what addrmap records) to its index (which is what is recorded
18257 in the index file). This will later be needed to write the address
18259 cu_index_htab
= htab_create_alloc (100,
18260 hash_psymtab_cu_index
,
18261 eq_psymtab_cu_index
,
18262 NULL
, xcalloc
, xfree
);
18263 make_cleanup_htab_delete (cu_index_htab
);
18264 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
18265 xmalloc (sizeof (struct psymtab_cu_index_map
)
18266 * dwarf2_per_objfile
->n_comp_units
);
18267 make_cleanup (xfree
, psymtab_cu_index_map
);
18269 /* The CU list is already sorted, so we don't need to do additional
18270 work here. Also, the debug_types entries do not appear in
18271 all_comp_units, but only in their own hash table. */
18272 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
18274 struct dwarf2_per_cu_data
*per_cu
18275 = dwarf2_per_objfile
->all_comp_units
[i
];
18276 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
18278 struct psymtab_cu_index_map
*map
;
18281 if (psymtab
->user
== NULL
)
18282 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
18284 map
= &psymtab_cu_index_map
[i
];
18285 map
->psymtab
= psymtab
;
18287 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
18288 gdb_assert (slot
!= NULL
);
18289 gdb_assert (*slot
== NULL
);
18292 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
18293 per_cu
->offset
.sect_off
);
18294 obstack_grow (&cu_list
, val
, 8);
18295 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
18296 obstack_grow (&cu_list
, val
, 8);
18299 /* Dump the address map. */
18300 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
18302 /* Write out the .debug_type entries, if any. */
18303 if (dwarf2_per_objfile
->signatured_types
)
18305 struct signatured_type_index_data sig_data
;
18307 sig_data
.objfile
= objfile
;
18308 sig_data
.symtab
= symtab
;
18309 sig_data
.types_list
= &types_cu_list
;
18310 sig_data
.psyms_seen
= psyms_seen
;
18311 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
18312 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
18313 write_one_signatured_type
, &sig_data
);
18316 /* Now that we've processed all symbols we can shrink their cu_indices
18318 uniquify_cu_indices (symtab
);
18320 obstack_init (&constant_pool
);
18321 make_cleanup_obstack_free (&constant_pool
);
18322 obstack_init (&symtab_obstack
);
18323 make_cleanup_obstack_free (&symtab_obstack
);
18324 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
18326 obstack_init (&contents
);
18327 make_cleanup_obstack_free (&contents
);
18328 size_of_contents
= 6 * sizeof (offset_type
);
18329 total_len
= size_of_contents
;
18331 /* The version number. */
18332 val
= MAYBE_SWAP (7);
18333 obstack_grow (&contents
, &val
, sizeof (val
));
18335 /* The offset of the CU list from the start of the file. */
18336 val
= MAYBE_SWAP (total_len
);
18337 obstack_grow (&contents
, &val
, sizeof (val
));
18338 total_len
+= obstack_object_size (&cu_list
);
18340 /* The offset of the types CU list from the start of the file. */
18341 val
= MAYBE_SWAP (total_len
);
18342 obstack_grow (&contents
, &val
, sizeof (val
));
18343 total_len
+= obstack_object_size (&types_cu_list
);
18345 /* The offset of the address table from the start of the file. */
18346 val
= MAYBE_SWAP (total_len
);
18347 obstack_grow (&contents
, &val
, sizeof (val
));
18348 total_len
+= obstack_object_size (&addr_obstack
);
18350 /* The offset of the symbol table from the start of the file. */
18351 val
= MAYBE_SWAP (total_len
);
18352 obstack_grow (&contents
, &val
, sizeof (val
));
18353 total_len
+= obstack_object_size (&symtab_obstack
);
18355 /* The offset of the constant pool from the start of the file. */
18356 val
= MAYBE_SWAP (total_len
);
18357 obstack_grow (&contents
, &val
, sizeof (val
));
18358 total_len
+= obstack_object_size (&constant_pool
);
18360 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
18362 write_obstack (out_file
, &contents
);
18363 write_obstack (out_file
, &cu_list
);
18364 write_obstack (out_file
, &types_cu_list
);
18365 write_obstack (out_file
, &addr_obstack
);
18366 write_obstack (out_file
, &symtab_obstack
);
18367 write_obstack (out_file
, &constant_pool
);
18371 /* We want to keep the file, so we set cleanup_filename to NULL
18372 here. See unlink_if_set. */
18373 cleanup_filename
= NULL
;
18375 do_cleanups (cleanup
);
18378 /* Implementation of the `save gdb-index' command.
18380 Note that the file format used by this command is documented in the
18381 GDB manual. Any changes here must be documented there. */
18384 save_gdb_index_command (char *arg
, int from_tty
)
18386 struct objfile
*objfile
;
18389 error (_("usage: save gdb-index DIRECTORY"));
18391 ALL_OBJFILES (objfile
)
18395 /* If the objfile does not correspond to an actual file, skip it. */
18396 if (stat (objfile
->name
, &st
) < 0)
18399 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
18400 if (dwarf2_per_objfile
)
18402 volatile struct gdb_exception except
;
18404 TRY_CATCH (except
, RETURN_MASK_ERROR
)
18406 write_psymtabs_to_index (objfile
, arg
);
18408 if (except
.reason
< 0)
18409 exception_fprintf (gdb_stderr
, except
,
18410 _("Error while writing index for `%s': "),
18418 int dwarf2_always_disassemble
;
18421 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
18422 struct cmd_list_element
*c
, const char *value
)
18424 fprintf_filtered (file
,
18425 _("Whether to always disassemble "
18426 "DWARF expressions is %s.\n"),
18431 show_check_physname (struct ui_file
*file
, int from_tty
,
18432 struct cmd_list_element
*c
, const char *value
)
18434 fprintf_filtered (file
,
18435 _("Whether to check \"physname\" is %s.\n"),
18439 void _initialize_dwarf2_read (void);
18442 _initialize_dwarf2_read (void)
18444 struct cmd_list_element
*c
;
18446 dwarf2_objfile_data_key
18447 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
18449 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
18450 Set DWARF 2 specific variables.\n\
18451 Configure DWARF 2 variables such as the cache size"),
18452 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
18453 0/*allow-unknown*/, &maintenance_set_cmdlist
);
18455 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
18456 Show DWARF 2 specific variables\n\
18457 Show DWARF 2 variables such as the cache size"),
18458 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
18459 0/*allow-unknown*/, &maintenance_show_cmdlist
);
18461 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
18462 &dwarf2_max_cache_age
, _("\
18463 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
18464 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
18465 A higher limit means that cached compilation units will be stored\n\
18466 in memory longer, and more total memory will be used. Zero disables\n\
18467 caching, which can slow down startup."),
18469 show_dwarf2_max_cache_age
,
18470 &set_dwarf2_cmdlist
,
18471 &show_dwarf2_cmdlist
);
18473 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
18474 &dwarf2_always_disassemble
, _("\
18475 Set whether `info address' always disassembles DWARF expressions."), _("\
18476 Show whether `info address' always disassembles DWARF expressions."), _("\
18477 When enabled, DWARF expressions are always printed in an assembly-like\n\
18478 syntax. When disabled, expressions will be printed in a more\n\
18479 conversational style, when possible."),
18481 show_dwarf2_always_disassemble
,
18482 &set_dwarf2_cmdlist
,
18483 &show_dwarf2_cmdlist
);
18485 add_setshow_boolean_cmd ("dwarf2-read", no_class
, &dwarf2_read_debug
, _("\
18486 Set debugging of the dwarf2 reader."), _("\
18487 Show debugging of the dwarf2 reader."), _("\
18488 When enabled, debugging messages are printed during dwarf2 reading\n\
18489 and symtab expansion."),
18492 &setdebuglist
, &showdebuglist
);
18494 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
18495 Set debugging of the dwarf2 DIE reader."), _("\
18496 Show debugging of the dwarf2 DIE reader."), _("\
18497 When enabled (non-zero), DIEs are dumped after they are read in.\n\
18498 The value is the maximum depth to print."),
18501 &setdebuglist
, &showdebuglist
);
18503 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
18504 Set cross-checking of \"physname\" code against demangler."), _("\
18505 Show cross-checking of \"physname\" code against demangler."), _("\
18506 When enabled, GDB's internal \"physname\" code is checked against\n\
18508 NULL
, show_check_physname
,
18509 &setdebuglist
, &showdebuglist
);
18511 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
18513 Save a gdb-index file.\n\
18514 Usage: save gdb-index DIRECTORY"),
18516 set_cmd_completer (c
, filename_completer
);