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. */
40 #include "gdb-demangle.h"
41 #include "expression.h"
42 #include "filenames.h" /* for DOSish file names */
45 #include "complaints.h"
47 #include "dwarf2expr.h"
48 #include "dwarf2loc.h"
49 #include "cp-support.h"
55 #include "typeprint.h"
58 #include "exceptions.h"
60 #include "completer.h"
65 #include "gdbcore.h" /* for gnutarget */
66 #include "gdb/gdb-index.h"
72 #include "gdb_string.h"
73 #include "gdb_assert.h"
74 #include <sys/types.h>
76 typedef struct symbol
*symbolp
;
79 /* When non-zero, print basic high level tracing messages.
80 This is in contrast to the low level DIE reading of dwarf2_die_debug. */
81 static int dwarf2_read_debug
= 0;
83 /* When non-zero, dump DIEs after they are read in. */
84 static unsigned int dwarf2_die_debug
= 0;
86 /* When non-zero, cross-check physname against demangler. */
87 static int check_physname
= 0;
89 /* When non-zero, do not reject deprecated .gdb_index sections. */
90 static int use_deprecated_index_sections
= 0;
92 /* When set, the file that we're processing is known to have debugging
93 info for C++ namespaces. GCC 3.3.x did not produce this information,
94 but later versions do. */
96 static int processing_has_namespace_info
;
98 static const struct objfile_data
*dwarf2_objfile_data_key
;
100 struct dwarf2_section_info
105 /* True if we have tried to read this section. */
109 typedef struct dwarf2_section_info dwarf2_section_info_def
;
110 DEF_VEC_O (dwarf2_section_info_def
);
112 /* All offsets in the index are of this type. It must be
113 architecture-independent. */
114 typedef uint32_t offset_type
;
116 DEF_VEC_I (offset_type
);
118 /* Ensure only legit values are used. */
119 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
121 gdb_assert ((unsigned int) (value) <= 1); \
122 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
125 /* Ensure only legit values are used. */
126 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
128 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
129 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
130 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
133 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
134 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
136 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
137 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
140 /* A description of the mapped index. The file format is described in
141 a comment by the code that writes the index. */
144 /* Index data format version. */
147 /* The total length of the buffer. */
150 /* A pointer to the address table data. */
151 const gdb_byte
*address_table
;
153 /* Size of the address table data in bytes. */
154 offset_type address_table_size
;
156 /* The symbol table, implemented as a hash table. */
157 const offset_type
*symbol_table
;
159 /* Size in slots, each slot is 2 offset_types. */
160 offset_type symbol_table_slots
;
162 /* A pointer to the constant pool. */
163 const char *constant_pool
;
166 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
167 DEF_VEC_P (dwarf2_per_cu_ptr
);
169 /* Collection of data recorded per objfile.
170 This hangs off of dwarf2_objfile_data_key. */
172 struct dwarf2_per_objfile
174 struct dwarf2_section_info info
;
175 struct dwarf2_section_info abbrev
;
176 struct dwarf2_section_info line
;
177 struct dwarf2_section_info loc
;
178 struct dwarf2_section_info macinfo
;
179 struct dwarf2_section_info macro
;
180 struct dwarf2_section_info str
;
181 struct dwarf2_section_info ranges
;
182 struct dwarf2_section_info addr
;
183 struct dwarf2_section_info frame
;
184 struct dwarf2_section_info eh_frame
;
185 struct dwarf2_section_info gdb_index
;
187 VEC (dwarf2_section_info_def
) *types
;
190 struct objfile
*objfile
;
192 /* Table of all the compilation units. This is used to locate
193 the target compilation unit of a particular reference. */
194 struct dwarf2_per_cu_data
**all_comp_units
;
196 /* The number of compilation units in ALL_COMP_UNITS. */
199 /* The number of .debug_types-related CUs. */
202 /* The .debug_types-related CUs (TUs). */
203 struct signatured_type
**all_type_units
;
205 /* The number of entries in all_type_unit_groups. */
206 int n_type_unit_groups
;
208 /* Table of type unit groups.
209 This exists to make it easy to iterate over all CUs and TU groups. */
210 struct type_unit_group
**all_type_unit_groups
;
212 /* Table of struct type_unit_group objects.
213 The hash key is the DW_AT_stmt_list value. */
214 htab_t type_unit_groups
;
216 /* A table mapping .debug_types signatures to its signatured_type entry.
217 This is NULL if the .debug_types section hasn't been read in yet. */
218 htab_t signatured_types
;
220 /* Type unit statistics, to see how well the scaling improvements
224 int nr_uniq_abbrev_tables
;
226 int nr_symtab_sharers
;
227 int nr_stmt_less_type_units
;
230 /* A chain of compilation units that are currently read in, so that
231 they can be freed later. */
232 struct dwarf2_per_cu_data
*read_in_chain
;
234 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
235 This is NULL if the table hasn't been allocated yet. */
238 /* Non-zero if we've check for whether there is a DWP file. */
241 /* The DWP file if there is one, or NULL. */
242 struct dwp_file
*dwp_file
;
244 /* The shared '.dwz' file, if one exists. This is used when the
245 original data was compressed using 'dwz -m'. */
246 struct dwz_file
*dwz_file
;
248 /* A flag indicating wether this objfile has a section loaded at a
250 int has_section_at_zero
;
252 /* True if we are using the mapped index,
253 or we are faking it for OBJF_READNOW's sake. */
254 unsigned char using_index
;
256 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
257 struct mapped_index
*index_table
;
259 /* When using index_table, this keeps track of all quick_file_names entries.
260 TUs typically share line table entries with a CU, so we maintain a
261 separate table of all line table entries to support the sharing.
262 Note that while there can be way more TUs than CUs, we've already
263 sorted all the TUs into "type unit groups", grouped by their
264 DW_AT_stmt_list value. Therefore the only sharing done here is with a
265 CU and its associated TU group if there is one. */
266 htab_t quick_file_names_table
;
268 /* Set during partial symbol reading, to prevent queueing of full
270 int reading_partial_symbols
;
272 /* Table mapping type DIEs to their struct type *.
273 This is NULL if not allocated yet.
274 The mapping is done via (CU/TU signature + DIE offset) -> type. */
275 htab_t die_type_hash
;
277 /* The CUs we recently read. */
278 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
281 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
283 /* Default names of the debugging sections. */
285 /* Note that if the debugging section has been compressed, it might
286 have a name like .zdebug_info. */
288 static const struct dwarf2_debug_sections dwarf2_elf_names
=
290 { ".debug_info", ".zdebug_info" },
291 { ".debug_abbrev", ".zdebug_abbrev" },
292 { ".debug_line", ".zdebug_line" },
293 { ".debug_loc", ".zdebug_loc" },
294 { ".debug_macinfo", ".zdebug_macinfo" },
295 { ".debug_macro", ".zdebug_macro" },
296 { ".debug_str", ".zdebug_str" },
297 { ".debug_ranges", ".zdebug_ranges" },
298 { ".debug_types", ".zdebug_types" },
299 { ".debug_addr", ".zdebug_addr" },
300 { ".debug_frame", ".zdebug_frame" },
301 { ".eh_frame", NULL
},
302 { ".gdb_index", ".zgdb_index" },
306 /* List of DWO/DWP sections. */
308 static const struct dwop_section_names
310 struct dwarf2_section_names abbrev_dwo
;
311 struct dwarf2_section_names info_dwo
;
312 struct dwarf2_section_names line_dwo
;
313 struct dwarf2_section_names loc_dwo
;
314 struct dwarf2_section_names macinfo_dwo
;
315 struct dwarf2_section_names macro_dwo
;
316 struct dwarf2_section_names str_dwo
;
317 struct dwarf2_section_names str_offsets_dwo
;
318 struct dwarf2_section_names types_dwo
;
319 struct dwarf2_section_names cu_index
;
320 struct dwarf2_section_names tu_index
;
324 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
325 { ".debug_info.dwo", ".zdebug_info.dwo" },
326 { ".debug_line.dwo", ".zdebug_line.dwo" },
327 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
328 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
329 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
330 { ".debug_str.dwo", ".zdebug_str.dwo" },
331 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
332 { ".debug_types.dwo", ".zdebug_types.dwo" },
333 { ".debug_cu_index", ".zdebug_cu_index" },
334 { ".debug_tu_index", ".zdebug_tu_index" },
337 /* local data types */
339 /* The data in a compilation unit header, after target2host
340 translation, looks like this. */
341 struct comp_unit_head
345 unsigned char addr_size
;
346 unsigned char signed_addr_p
;
347 sect_offset abbrev_offset
;
349 /* Size of file offsets; either 4 or 8. */
350 unsigned int offset_size
;
352 /* Size of the length field; either 4 or 12. */
353 unsigned int initial_length_size
;
355 /* Offset to the first byte of this compilation unit header in the
356 .debug_info section, for resolving relative reference dies. */
359 /* Offset to first die in this cu from the start of the cu.
360 This will be the first byte following the compilation unit header. */
361 cu_offset first_die_offset
;
364 /* Type used for delaying computation of method physnames.
365 See comments for compute_delayed_physnames. */
366 struct delayed_method_info
368 /* The type to which the method is attached, i.e., its parent class. */
371 /* The index of the method in the type's function fieldlists. */
374 /* The index of the method in the fieldlist. */
377 /* The name of the DIE. */
380 /* The DIE associated with this method. */
381 struct die_info
*die
;
384 typedef struct delayed_method_info delayed_method_info
;
385 DEF_VEC_O (delayed_method_info
);
387 /* Internal state when decoding a particular compilation unit. */
390 /* The objfile containing this compilation unit. */
391 struct objfile
*objfile
;
393 /* The header of the compilation unit. */
394 struct comp_unit_head header
;
396 /* Base address of this compilation unit. */
397 CORE_ADDR base_address
;
399 /* Non-zero if base_address has been set. */
402 /* The language we are debugging. */
403 enum language language
;
404 const struct language_defn
*language_defn
;
406 const char *producer
;
408 /* The generic symbol table building routines have separate lists for
409 file scope symbols and all all other scopes (local scopes). So
410 we need to select the right one to pass to add_symbol_to_list().
411 We do it by keeping a pointer to the correct list in list_in_scope.
413 FIXME: The original dwarf code just treated the file scope as the
414 first local scope, and all other local scopes as nested local
415 scopes, and worked fine. Check to see if we really need to
416 distinguish these in buildsym.c. */
417 struct pending
**list_in_scope
;
419 /* The abbrev table for this CU.
420 Normally this points to the abbrev table in the objfile.
421 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
422 struct abbrev_table
*abbrev_table
;
424 /* Hash table holding all the loaded partial DIEs
425 with partial_die->offset.SECT_OFF as hash. */
428 /* Storage for things with the same lifetime as this read-in compilation
429 unit, including partial DIEs. */
430 struct obstack comp_unit_obstack
;
432 /* When multiple dwarf2_cu structures are living in memory, this field
433 chains them all together, so that they can be released efficiently.
434 We will probably also want a generation counter so that most-recently-used
435 compilation units are cached... */
436 struct dwarf2_per_cu_data
*read_in_chain
;
438 /* Backchain to our per_cu entry if the tree has been built. */
439 struct dwarf2_per_cu_data
*per_cu
;
441 /* How many compilation units ago was this CU last referenced? */
444 /* A hash table of DIE cu_offset for following references with
445 die_info->offset.sect_off as hash. */
448 /* Full DIEs if read in. */
449 struct die_info
*dies
;
451 /* A set of pointers to dwarf2_per_cu_data objects for compilation
452 units referenced by this one. Only set during full symbol processing;
453 partial symbol tables do not have dependencies. */
456 /* Header data from the line table, during full symbol processing. */
457 struct line_header
*line_header
;
459 /* A list of methods which need to have physnames computed
460 after all type information has been read. */
461 VEC (delayed_method_info
) *method_list
;
463 /* To be copied to symtab->call_site_htab. */
464 htab_t call_site_htab
;
466 /* Non-NULL if this CU came from a DWO file.
467 There is an invariant here that is important to remember:
468 Except for attributes copied from the top level DIE in the "main"
469 (or "stub") file in preparation for reading the DWO file
470 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
471 Either there isn't a DWO file (in which case this is NULL and the point
472 is moot), or there is and either we're not going to read it (in which
473 case this is NULL) or there is and we are reading it (in which case this
475 struct dwo_unit
*dwo_unit
;
477 /* The DW_AT_addr_base attribute if present, zero otherwise
478 (zero is a valid value though).
479 Note this value comes from the stub CU/TU's DIE. */
482 /* The DW_AT_ranges_base attribute if present, zero otherwise
483 (zero is a valid value though).
484 Note this value comes from the stub CU/TU's DIE.
485 Also note that the value is zero in the non-DWO case so this value can
486 be used without needing to know whether DWO files are in use or not.
487 N.B. This does not apply to DW_AT_ranges appearing in
488 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
489 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
490 DW_AT_ranges_base *would* have to be applied, and we'd have to care
491 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
492 ULONGEST ranges_base
;
494 /* Mark used when releasing cached dies. */
495 unsigned int mark
: 1;
497 /* This CU references .debug_loc. See the symtab->locations_valid field.
498 This test is imperfect as there may exist optimized debug code not using
499 any location list and still facing inlining issues if handled as
500 unoptimized code. For a future better test see GCC PR other/32998. */
501 unsigned int has_loclist
: 1;
503 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
504 if all the producer_is_* fields are valid. This information is cached
505 because profiling CU expansion showed excessive time spent in
506 producer_is_gxx_lt_4_6. */
507 unsigned int checked_producer
: 1;
508 unsigned int producer_is_gxx_lt_4_6
: 1;
509 unsigned int producer_is_gcc_lt_4_3
: 1;
510 unsigned int producer_is_icc
: 1;
513 /* Persistent data held for a compilation unit, even when not
514 processing it. We put a pointer to this structure in the
515 read_symtab_private field of the psymtab. */
517 struct dwarf2_per_cu_data
519 /* The start offset and length of this compilation unit.
520 NOTE: Unlike comp_unit_head.length, this length includes
522 If the DIE refers to a DWO file, this is always of the original die,
527 /* Flag indicating this compilation unit will be read in before
528 any of the current compilation units are processed. */
529 unsigned int queued
: 1;
531 /* This flag will be set when reading partial DIEs if we need to load
532 absolutely all DIEs for this compilation unit, instead of just the ones
533 we think are interesting. It gets set if we look for a DIE in the
534 hash table and don't find it. */
535 unsigned int load_all_dies
: 1;
537 /* Non-zero if this CU is from .debug_types. */
538 unsigned int is_debug_types
: 1;
540 /* Non-zero if this CU is from the .dwz file. */
541 unsigned int is_dwz
: 1;
543 /* The section this CU/TU lives in.
544 If the DIE refers to a DWO file, this is always the original die,
546 struct dwarf2_section_info
*info_or_types_section
;
548 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
549 of the CU cache it gets reset to NULL again. */
550 struct dwarf2_cu
*cu
;
552 /* The corresponding objfile.
553 Normally we can get the objfile from dwarf2_per_objfile.
554 However we can enter this file with just a "per_cu" handle. */
555 struct objfile
*objfile
;
557 /* When using partial symbol tables, the 'psymtab' field is active.
558 Otherwise the 'quick' field is active. */
561 /* The partial symbol table associated with this compilation unit,
562 or NULL for unread partial units. */
563 struct partial_symtab
*psymtab
;
565 /* Data needed by the "quick" functions. */
566 struct dwarf2_per_cu_quick_data
*quick
;
571 /* The CUs we import using DW_TAG_imported_unit. This is filled in
572 while reading psymtabs, used to compute the psymtab dependencies,
573 and then cleared. Then it is filled in again while reading full
574 symbols, and only deleted when the objfile is destroyed. */
575 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
577 /* Type units are grouped by their DW_AT_stmt_list entry so that they
578 can share them. If this is a TU, this points to the containing
580 struct type_unit_group
*type_unit_group
;
584 /* Entry in the signatured_types hash table. */
586 struct signatured_type
588 /* The "per_cu" object of this type.
589 N.B.: This is the first member so that it's easy to convert pointers
591 struct dwarf2_per_cu_data per_cu
;
593 /* The type's signature. */
596 /* Offset in the TU of the type's DIE, as read from the TU header.
597 If the definition lives in a DWO file, this value is unusable. */
598 cu_offset type_offset_in_tu
;
600 /* Offset in the section of the type's DIE.
601 If the definition lives in a DWO file, this is the offset in the
602 .debug_types.dwo section.
603 The value is zero until the actual value is known.
604 Zero is otherwise not a valid section offset. */
605 sect_offset type_offset_in_section
;
608 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
609 This includes type_unit_group and quick_file_names. */
611 struct stmt_list_hash
613 /* The DWO unit this table is from or NULL if there is none. */
614 struct dwo_unit
*dwo_unit
;
616 /* Offset in .debug_line or .debug_line.dwo. */
617 sect_offset line_offset
;
620 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
621 an object of this type. */
623 struct type_unit_group
625 /* dwarf2read.c's main "handle" on the symtab.
626 To simplify things we create an artificial CU that "includes" all the
627 type units using this stmt_list so that the rest of the code still has
628 a "per_cu" handle on the symtab.
629 This PER_CU is recognized by having no section. */
630 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->info_or_types_section == NULL)
631 struct dwarf2_per_cu_data per_cu
;
635 /* The TUs that share this DW_AT_stmt_list entry.
636 This is added to while parsing type units to build partial symtabs,
637 and is deleted afterwards and not used again. */
638 VEC (dwarf2_per_cu_ptr
) *tus
;
640 /* When reading the line table in "quick" functions, we need a real TU.
641 Any will do, we know they all share the same DW_AT_stmt_list entry.
642 For simplicity's sake, we pick the first one. */
643 struct dwarf2_per_cu_data
*first_tu
;
646 /* The primary symtab.
647 Type units in a group needn't all be defined in the same source file,
648 so we create an essentially anonymous symtab as the primary symtab. */
649 struct symtab
*primary_symtab
;
651 /* The data used to construct the hash key. */
652 struct stmt_list_hash hash
;
654 /* The number of symtabs from the line header.
655 The value here must match line_header.num_file_names. */
656 unsigned int num_symtabs
;
658 /* The symbol tables for this TU (obtained from the files listed in
660 WARNING: The order of entries here must match the order of entries
661 in the line header. After the first TU using this type_unit_group, the
662 line header for the subsequent TUs is recreated from this. This is done
663 because we need to use the same symtabs for each TU using the same
664 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
665 there's no guarantee the line header doesn't have duplicate entries. */
666 struct symtab
**symtabs
;
669 /* These sections are what may appear in a DWO file. */
673 struct dwarf2_section_info abbrev
;
674 struct dwarf2_section_info line
;
675 struct dwarf2_section_info loc
;
676 struct dwarf2_section_info macinfo
;
677 struct dwarf2_section_info macro
;
678 struct dwarf2_section_info str
;
679 struct dwarf2_section_info str_offsets
;
680 /* In the case of a virtual DWO file, these two are unused. */
681 struct dwarf2_section_info info
;
682 VEC (dwarf2_section_info_def
) *types
;
685 /* Common bits of DWO CUs/TUs. */
689 /* Backlink to the containing struct dwo_file. */
690 struct dwo_file
*dwo_file
;
692 /* The "id" that distinguishes this CU/TU.
693 .debug_info calls this "dwo_id", .debug_types calls this "signature".
694 Since signatures came first, we stick with it for consistency. */
697 /* The section this CU/TU lives in, in the DWO file. */
698 struct dwarf2_section_info
*info_or_types_section
;
700 /* Same as dwarf2_per_cu_data:{offset,length} but for the DWO section. */
704 /* For types, offset in the type's DIE of the type defined by this TU. */
705 cu_offset type_offset_in_tu
;
708 /* Data for one DWO file.
709 This includes virtual DWO files that have been packaged into a
714 /* The DW_AT_GNU_dwo_name attribute. This is the hash key.
715 For virtual DWO files the name is constructed from the section offsets
716 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
717 from related CU+TUs. */
720 /* The bfd, when the file is open. Otherwise this is NULL.
721 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
724 /* Section info for this file. */
725 struct dwo_sections sections
;
727 /* Table of CUs in the file.
728 Each element is a struct dwo_unit. */
731 /* Table of TUs in the file.
732 Each element is a struct dwo_unit. */
736 /* These sections are what may appear in a DWP file. */
740 struct dwarf2_section_info str
;
741 struct dwarf2_section_info cu_index
;
742 struct dwarf2_section_info tu_index
;
743 /* The .debug_info.dwo, .debug_types.dwo, and other sections are referenced
744 by section number. We don't need to record them here. */
747 /* These sections are what may appear in a virtual DWO file. */
749 struct virtual_dwo_sections
751 struct dwarf2_section_info abbrev
;
752 struct dwarf2_section_info line
;
753 struct dwarf2_section_info loc
;
754 struct dwarf2_section_info macinfo
;
755 struct dwarf2_section_info macro
;
756 struct dwarf2_section_info str_offsets
;
757 /* Each DWP hash table entry records one CU or one TU.
758 That is recorded here, and copied to dwo_unit.info_or_types_section. */
759 struct dwarf2_section_info info_or_types
;
762 /* Contents of DWP hash tables. */
764 struct dwp_hash_table
766 uint32_t nr_units
, nr_slots
;
767 const gdb_byte
*hash_table
, *unit_table
, *section_pool
;
770 /* Data for one DWP file. */
774 /* Name of the file. */
777 /* The bfd, when the file is open. Otherwise this is NULL. */
780 /* Section info for this file. */
781 struct dwp_sections sections
;
783 /* Table of CUs in the file. */
784 const struct dwp_hash_table
*cus
;
786 /* Table of TUs in the file. */
787 const struct dwp_hash_table
*tus
;
789 /* Table of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
792 /* Table to map ELF section numbers to their sections. */
793 unsigned int num_sections
;
794 asection
**elf_sections
;
797 /* This represents a '.dwz' file. */
801 /* A dwz file can only contain a few sections. */
802 struct dwarf2_section_info abbrev
;
803 struct dwarf2_section_info info
;
804 struct dwarf2_section_info str
;
805 struct dwarf2_section_info line
;
806 struct dwarf2_section_info macro
;
807 struct dwarf2_section_info gdb_index
;
813 /* Struct used to pass misc. parameters to read_die_and_children, et
814 al. which are used for both .debug_info and .debug_types dies.
815 All parameters here are unchanging for the life of the call. This
816 struct exists to abstract away the constant parameters of die reading. */
818 struct die_reader_specs
820 /* die_section->asection->owner. */
823 /* The CU of the DIE we are parsing. */
824 struct dwarf2_cu
*cu
;
826 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
827 struct dwo_file
*dwo_file
;
829 /* The section the die comes from.
830 This is either .debug_info or .debug_types, or the .dwo variants. */
831 struct dwarf2_section_info
*die_section
;
833 /* die_section->buffer. */
836 /* The end of the buffer. */
837 const gdb_byte
*buffer_end
;
840 /* Type of function passed to init_cutu_and_read_dies, et.al. */
841 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
843 struct die_info
*comp_unit_die
,
847 /* The line number information for a compilation unit (found in the
848 .debug_line section) begins with a "statement program header",
849 which contains the following information. */
852 unsigned int total_length
;
853 unsigned short version
;
854 unsigned int header_length
;
855 unsigned char minimum_instruction_length
;
856 unsigned char maximum_ops_per_instruction
;
857 unsigned char default_is_stmt
;
859 unsigned char line_range
;
860 unsigned char opcode_base
;
862 /* standard_opcode_lengths[i] is the number of operands for the
863 standard opcode whose value is i. This means that
864 standard_opcode_lengths[0] is unused, and the last meaningful
865 element is standard_opcode_lengths[opcode_base - 1]. */
866 unsigned char *standard_opcode_lengths
;
868 /* The include_directories table. NOTE! These strings are not
869 allocated with xmalloc; instead, they are pointers into
870 debug_line_buffer. If you try to free them, `free' will get
872 unsigned int num_include_dirs
, include_dirs_size
;
875 /* The file_names table. NOTE! These strings are not allocated
876 with xmalloc; instead, they are pointers into debug_line_buffer.
877 Don't try to free them directly. */
878 unsigned int num_file_names
, file_names_size
;
882 unsigned int dir_index
;
883 unsigned int mod_time
;
885 int included_p
; /* Non-zero if referenced by the Line Number Program. */
886 struct symtab
*symtab
; /* The associated symbol table, if any. */
889 /* The start and end of the statement program following this
890 header. These point into dwarf2_per_objfile->line_buffer. */
891 gdb_byte
*statement_program_start
, *statement_program_end
;
894 /* When we construct a partial symbol table entry we only
895 need this much information. */
896 struct partial_die_info
898 /* Offset of this DIE. */
901 /* DWARF-2 tag for this DIE. */
902 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
904 /* Assorted flags describing the data found in this DIE. */
905 unsigned int has_children
: 1;
906 unsigned int is_external
: 1;
907 unsigned int is_declaration
: 1;
908 unsigned int has_type
: 1;
909 unsigned int has_specification
: 1;
910 unsigned int has_pc_info
: 1;
911 unsigned int may_be_inlined
: 1;
913 /* Flag set if the SCOPE field of this structure has been
915 unsigned int scope_set
: 1;
917 /* Flag set if the DIE has a byte_size attribute. */
918 unsigned int has_byte_size
: 1;
920 /* Flag set if any of the DIE's children are template arguments. */
921 unsigned int has_template_arguments
: 1;
923 /* Flag set if fixup_partial_die has been called on this die. */
924 unsigned int fixup_called
: 1;
926 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
927 unsigned int is_dwz
: 1;
929 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
930 unsigned int spec_is_dwz
: 1;
932 /* The name of this DIE. Normally the value of DW_AT_name, but
933 sometimes a default name for unnamed DIEs. */
936 /* The linkage name, if present. */
937 const char *linkage_name
;
939 /* The scope to prepend to our children. This is generally
940 allocated on the comp_unit_obstack, so will disappear
941 when this compilation unit leaves the cache. */
944 /* Some data associated with the partial DIE. The tag determines
945 which field is live. */
948 /* The location description associated with this DIE, if any. */
949 struct dwarf_block
*locdesc
;
950 /* The offset of an import, for DW_TAG_imported_unit. */
954 /* If HAS_PC_INFO, the PC range associated with this DIE. */
958 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
959 DW_AT_sibling, if any. */
960 /* NOTE: This member isn't strictly necessary, read_partial_die could
961 return DW_AT_sibling values to its caller load_partial_dies. */
964 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
965 DW_AT_specification (or DW_AT_abstract_origin or
967 sect_offset spec_offset
;
969 /* Pointers to this DIE's parent, first child, and next sibling,
971 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
974 /* This data structure holds the information of an abbrev. */
977 unsigned int number
; /* number identifying abbrev */
978 enum dwarf_tag tag
; /* dwarf tag */
979 unsigned short has_children
; /* boolean */
980 unsigned short num_attrs
; /* number of attributes */
981 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
982 struct abbrev_info
*next
; /* next in chain */
987 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
988 ENUM_BITFIELD(dwarf_form
) form
: 16;
991 /* Size of abbrev_table.abbrev_hash_table. */
992 #define ABBREV_HASH_SIZE 121
994 /* Top level data structure to contain an abbreviation table. */
998 /* Where the abbrev table came from.
999 This is used as a sanity check when the table is used. */
1002 /* Storage for the abbrev table. */
1003 struct obstack abbrev_obstack
;
1005 /* Hash table of abbrevs.
1006 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1007 It could be statically allocated, but the previous code didn't so we
1009 struct abbrev_info
**abbrevs
;
1012 /* Attributes have a name and a value. */
1015 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1016 ENUM_BITFIELD(dwarf_form
) form
: 15;
1018 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1019 field should be in u.str (existing only for DW_STRING) but it is kept
1020 here for better struct attribute alignment. */
1021 unsigned int string_is_canonical
: 1;
1026 struct dwarf_block
*blk
;
1030 struct signatured_type
*signatured_type
;
1035 /* This data structure holds a complete die structure. */
1038 /* DWARF-2 tag for this DIE. */
1039 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1041 /* Number of attributes */
1042 unsigned char num_attrs
;
1044 /* True if we're presently building the full type name for the
1045 type derived from this DIE. */
1046 unsigned char building_fullname
: 1;
1049 unsigned int abbrev
;
1051 /* Offset in .debug_info or .debug_types section. */
1054 /* The dies in a compilation unit form an n-ary tree. PARENT
1055 points to this die's parent; CHILD points to the first child of
1056 this node; and all the children of a given node are chained
1057 together via their SIBLING fields. */
1058 struct die_info
*child
; /* Its first child, if any. */
1059 struct die_info
*sibling
; /* Its next sibling, if any. */
1060 struct die_info
*parent
; /* Its parent, if any. */
1062 /* An array of attributes, with NUM_ATTRS elements. There may be
1063 zero, but it's not common and zero-sized arrays are not
1064 sufficiently portable C. */
1065 struct attribute attrs
[1];
1068 /* Get at parts of an attribute structure. */
1070 #define DW_STRING(attr) ((attr)->u.str)
1071 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1072 #define DW_UNSND(attr) ((attr)->u.unsnd)
1073 #define DW_BLOCK(attr) ((attr)->u.blk)
1074 #define DW_SND(attr) ((attr)->u.snd)
1075 #define DW_ADDR(attr) ((attr)->u.addr)
1076 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
1078 /* Blocks are a bunch of untyped bytes. */
1083 /* Valid only if SIZE is not zero. */
1087 #ifndef ATTR_ALLOC_CHUNK
1088 #define ATTR_ALLOC_CHUNK 4
1091 /* Allocate fields for structs, unions and enums in this size. */
1092 #ifndef DW_FIELD_ALLOC_CHUNK
1093 #define DW_FIELD_ALLOC_CHUNK 4
1096 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1097 but this would require a corresponding change in unpack_field_as_long
1099 static int bits_per_byte
= 8;
1101 /* The routines that read and process dies for a C struct or C++ class
1102 pass lists of data member fields and lists of member function fields
1103 in an instance of a field_info structure, as defined below. */
1106 /* List of data member and baseclasses fields. */
1109 struct nextfield
*next
;
1114 *fields
, *baseclasses
;
1116 /* Number of fields (including baseclasses). */
1119 /* Number of baseclasses. */
1122 /* Set if the accesibility of one of the fields is not public. */
1123 int non_public_fields
;
1125 /* Member function fields array, entries are allocated in the order they
1126 are encountered in the object file. */
1129 struct nextfnfield
*next
;
1130 struct fn_field fnfield
;
1134 /* Member function fieldlist array, contains name of possibly overloaded
1135 member function, number of overloaded member functions and a pointer
1136 to the head of the member function field chain. */
1141 struct nextfnfield
*head
;
1145 /* Number of entries in the fnfieldlists array. */
1148 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1149 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1150 struct typedef_field_list
1152 struct typedef_field field
;
1153 struct typedef_field_list
*next
;
1155 *typedef_field_list
;
1156 unsigned typedef_field_list_count
;
1159 /* One item on the queue of compilation units to read in full symbols
1161 struct dwarf2_queue_item
1163 struct dwarf2_per_cu_data
*per_cu
;
1164 enum language pretend_language
;
1165 struct dwarf2_queue_item
*next
;
1168 /* The current queue. */
1169 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1171 /* Loaded secondary compilation units are kept in memory until they
1172 have not been referenced for the processing of this many
1173 compilation units. Set this to zero to disable caching. Cache
1174 sizes of up to at least twenty will improve startup time for
1175 typical inter-CU-reference binaries, at an obvious memory cost. */
1176 static int dwarf2_max_cache_age
= 5;
1178 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
1179 struct cmd_list_element
*c
, const char *value
)
1181 fprintf_filtered (file
, _("The upper bound on the age of cached "
1182 "dwarf2 compilation units is %s.\n"),
1187 /* Various complaints about symbol reading that don't abort the process. */
1190 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1192 complaint (&symfile_complaints
,
1193 _("statement list doesn't fit in .debug_line section"));
1197 dwarf2_debug_line_missing_file_complaint (void)
1199 complaint (&symfile_complaints
,
1200 _(".debug_line section has line data without a file"));
1204 dwarf2_debug_line_missing_end_sequence_complaint (void)
1206 complaint (&symfile_complaints
,
1207 _(".debug_line section has line "
1208 "program sequence without an end"));
1212 dwarf2_complex_location_expr_complaint (void)
1214 complaint (&symfile_complaints
, _("location expression too complex"));
1218 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1221 complaint (&symfile_complaints
,
1222 _("const value length mismatch for '%s', got %d, expected %d"),
1227 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1229 complaint (&symfile_complaints
,
1230 _("debug info runs off end of %s section"
1232 section
->asection
->name
,
1233 bfd_get_filename (section
->asection
->owner
));
1237 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1239 complaint (&symfile_complaints
,
1240 _("macro debug info contains a "
1241 "malformed macro definition:\n`%s'"),
1246 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1248 complaint (&symfile_complaints
,
1249 _("invalid attribute class or form for '%s' in '%s'"),
1253 /* local function prototypes */
1255 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1257 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
1260 static void dwarf2_find_base_address (struct die_info
*die
,
1261 struct dwarf2_cu
*cu
);
1263 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1265 static void scan_partial_symbols (struct partial_die_info
*,
1266 CORE_ADDR
*, CORE_ADDR
*,
1267 int, struct dwarf2_cu
*);
1269 static void add_partial_symbol (struct partial_die_info
*,
1270 struct dwarf2_cu
*);
1272 static void add_partial_namespace (struct partial_die_info
*pdi
,
1273 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1274 int need_pc
, struct dwarf2_cu
*cu
);
1276 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1277 CORE_ADDR
*highpc
, int need_pc
,
1278 struct dwarf2_cu
*cu
);
1280 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1281 struct dwarf2_cu
*cu
);
1283 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1284 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1285 int need_pc
, struct dwarf2_cu
*cu
);
1287 static void dwarf2_psymtab_to_symtab (struct objfile
*,
1288 struct partial_symtab
*);
1290 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1292 static struct abbrev_info
*abbrev_table_lookup_abbrev
1293 (const struct abbrev_table
*, unsigned int);
1295 static struct abbrev_table
*abbrev_table_read_table
1296 (struct dwarf2_section_info
*, sect_offset
);
1298 static void abbrev_table_free (struct abbrev_table
*);
1300 static void abbrev_table_free_cleanup (void *);
1302 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1303 struct dwarf2_section_info
*);
1305 static void dwarf2_free_abbrev_table (void *);
1307 static unsigned int peek_abbrev_code (bfd
*, gdb_byte
*);
1309 static struct partial_die_info
*load_partial_dies
1310 (const struct die_reader_specs
*, gdb_byte
*, int);
1312 static gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1313 struct partial_die_info
*,
1314 struct abbrev_info
*,
1318 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1319 struct dwarf2_cu
*);
1321 static void fixup_partial_die (struct partial_die_info
*,
1322 struct dwarf2_cu
*);
1324 static gdb_byte
*read_attribute (const struct die_reader_specs
*,
1325 struct attribute
*, struct attr_abbrev
*,
1328 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1330 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1332 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1334 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1336 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1338 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
1341 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
1343 static LONGEST read_checked_initial_length_and_offset
1344 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
1345 unsigned int *, unsigned int *);
1347 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
1350 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
1352 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1355 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
1357 static char *read_direct_string (bfd
*, gdb_byte
*, unsigned int *);
1359 static char *read_indirect_string (bfd
*, gdb_byte
*,
1360 const struct comp_unit_head
*,
1363 static char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1365 static ULONGEST
read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
1367 static LONGEST
read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
1369 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*, gdb_byte
*,
1372 static char *read_str_index (const struct die_reader_specs
*reader
,
1373 struct dwarf2_cu
*cu
, ULONGEST str_index
);
1375 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1377 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1378 struct dwarf2_cu
*);
1380 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1383 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1384 struct dwarf2_cu
*cu
);
1386 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1388 static struct die_info
*die_specification (struct die_info
*die
,
1389 struct dwarf2_cu
**);
1391 static void free_line_header (struct line_header
*lh
);
1393 static void add_file_name (struct line_header
*, char *, unsigned int,
1394 unsigned int, unsigned int);
1396 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1397 struct dwarf2_cu
*cu
);
1399 static void dwarf_decode_lines (struct line_header
*, const char *,
1400 struct dwarf2_cu
*, struct partial_symtab
*,
1403 static void dwarf2_start_subfile (char *, const char *, const char *);
1405 static void dwarf2_start_symtab (struct dwarf2_cu
*,
1406 char *, char *, CORE_ADDR
);
1408 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1409 struct dwarf2_cu
*);
1411 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1412 struct dwarf2_cu
*, struct symbol
*);
1414 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
1415 struct dwarf2_cu
*);
1417 static void dwarf2_const_value_attr (struct attribute
*attr
,
1420 struct obstack
*obstack
,
1421 struct dwarf2_cu
*cu
, LONGEST
*value
,
1423 struct dwarf2_locexpr_baton
**baton
);
1425 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1427 static int need_gnat_info (struct dwarf2_cu
*);
1429 static struct type
*die_descriptive_type (struct die_info
*,
1430 struct dwarf2_cu
*);
1432 static void set_descriptive_type (struct type
*, struct die_info
*,
1433 struct dwarf2_cu
*);
1435 static struct type
*die_containing_type (struct die_info
*,
1436 struct dwarf2_cu
*);
1438 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1439 struct dwarf2_cu
*);
1441 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1443 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1445 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1447 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1448 const char *suffix
, int physname
,
1449 struct dwarf2_cu
*cu
);
1451 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1453 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1455 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1457 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1459 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1461 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1462 struct dwarf2_cu
*, struct partial_symtab
*);
1464 static int dwarf2_get_pc_bounds (struct die_info
*,
1465 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1466 struct partial_symtab
*);
1468 static void get_scope_pc_bounds (struct die_info
*,
1469 CORE_ADDR
*, CORE_ADDR
*,
1470 struct dwarf2_cu
*);
1472 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1473 CORE_ADDR
, struct dwarf2_cu
*);
1475 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1476 struct dwarf2_cu
*);
1478 static void dwarf2_attach_fields_to_type (struct field_info
*,
1479 struct type
*, struct dwarf2_cu
*);
1481 static void dwarf2_add_member_fn (struct field_info
*,
1482 struct die_info
*, struct type
*,
1483 struct dwarf2_cu
*);
1485 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1487 struct dwarf2_cu
*);
1489 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1491 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1493 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1495 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1497 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1499 static struct type
*read_module_type (struct die_info
*die
,
1500 struct dwarf2_cu
*cu
);
1502 static const char *namespace_name (struct die_info
*die
,
1503 int *is_anonymous
, struct dwarf2_cu
*);
1505 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1507 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1509 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1510 struct dwarf2_cu
*);
1512 static struct die_info
*read_die_and_children (const struct die_reader_specs
*,
1514 gdb_byte
**new_info_ptr
,
1515 struct die_info
*parent
);
1517 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1519 gdb_byte
**new_info_ptr
,
1520 struct die_info
*parent
);
1522 static gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1523 struct die_info
**, gdb_byte
*, int *, int);
1525 static gdb_byte
*read_full_die (const struct die_reader_specs
*,
1526 struct die_info
**, gdb_byte
*, int *);
1528 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1530 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1533 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1535 static const char *dwarf2_full_name (char *name
,
1536 struct die_info
*die
,
1537 struct dwarf2_cu
*cu
);
1539 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1540 struct dwarf2_cu
**);
1542 static const char *dwarf_tag_name (unsigned int);
1544 static const char *dwarf_attr_name (unsigned int);
1546 static const char *dwarf_form_name (unsigned int);
1548 static char *dwarf_bool_name (unsigned int);
1550 static const char *dwarf_type_encoding_name (unsigned int);
1552 static struct die_info
*sibling_die (struct die_info
*);
1554 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1556 static void dump_die_for_error (struct die_info
*);
1558 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1561 /*static*/ void dump_die (struct die_info
*, int max_level
);
1563 static void store_in_ref_table (struct die_info
*,
1564 struct dwarf2_cu
*);
1566 static int is_ref_attr (struct attribute
*);
1568 static sect_offset
dwarf2_get_ref_die_offset (struct attribute
*);
1570 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1572 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1574 struct dwarf2_cu
**);
1576 static struct die_info
*follow_die_ref (struct die_info
*,
1578 struct dwarf2_cu
**);
1580 static struct die_info
*follow_die_sig (struct die_info
*,
1582 struct dwarf2_cu
**);
1584 static struct signatured_type
*lookup_signatured_type_at_offset
1585 (struct objfile
*objfile
,
1586 struct dwarf2_section_info
*section
, sect_offset offset
);
1588 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1590 static void read_signatured_type (struct signatured_type
*);
1592 static struct type_unit_group
*get_type_unit_group
1593 (struct dwarf2_cu
*, struct attribute
*);
1595 static void build_type_unit_groups (die_reader_func_ftype
*, void *);
1597 /* memory allocation interface */
1599 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1601 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1603 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int,
1606 static int attr_form_is_block (struct attribute
*);
1608 static int attr_form_is_section_offset (struct attribute
*);
1610 static int attr_form_is_constant (struct attribute
*);
1612 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1613 struct dwarf2_loclist_baton
*baton
,
1614 struct attribute
*attr
);
1616 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1618 struct dwarf2_cu
*cu
);
1620 static gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1622 struct abbrev_info
*abbrev
);
1624 static void free_stack_comp_unit (void *);
1626 static hashval_t
partial_die_hash (const void *item
);
1628 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1630 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1631 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1633 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1634 struct dwarf2_per_cu_data
*per_cu
);
1636 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1637 struct die_info
*comp_unit_die
,
1638 enum language pretend_language
);
1640 static void free_heap_comp_unit (void *);
1642 static void free_cached_comp_units (void *);
1644 static void age_cached_comp_units (void);
1646 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1648 static struct type
*set_die_type (struct die_info
*, struct type
*,
1649 struct dwarf2_cu
*);
1651 static void create_all_comp_units (struct objfile
*);
1653 static int create_all_type_units (struct objfile
*);
1655 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1658 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1661 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1664 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1665 struct dwarf2_per_cu_data
*);
1667 static void dwarf2_mark (struct dwarf2_cu
*);
1669 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1671 static struct type
*get_die_type_at_offset (sect_offset
,
1672 struct dwarf2_per_cu_data
*per_cu
);
1674 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1676 static void dwarf2_release_queue (void *dummy
);
1678 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1679 enum language pretend_language
);
1681 static int maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
1682 struct dwarf2_per_cu_data
*per_cu
,
1683 enum language pretend_language
);
1685 static void process_queue (void);
1687 static void find_file_and_directory (struct die_info
*die
,
1688 struct dwarf2_cu
*cu
,
1689 char **name
, char **comp_dir
);
1691 static char *file_full_name (int file
, struct line_header
*lh
,
1692 const char *comp_dir
);
1694 static gdb_byte
*read_and_check_comp_unit_head
1695 (struct comp_unit_head
*header
,
1696 struct dwarf2_section_info
*section
,
1697 struct dwarf2_section_info
*abbrev_section
, gdb_byte
*info_ptr
,
1698 int is_debug_types_section
);
1700 static void init_cutu_and_read_dies
1701 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1702 int use_existing_cu
, int keep
,
1703 die_reader_func_ftype
*die_reader_func
, void *data
);
1705 static void init_cutu_and_read_dies_simple
1706 (struct dwarf2_per_cu_data
*this_cu
,
1707 die_reader_func_ftype
*die_reader_func
, void *data
);
1709 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1711 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1713 static struct dwo_unit
*lookup_dwo_comp_unit
1714 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1716 static struct dwo_unit
*lookup_dwo_type_unit
1717 (struct signatured_type
*, const char *, const char *);
1719 static void free_dwo_file_cleanup (void *);
1721 static void process_cu_includes (void);
1723 static void check_producer (struct dwarf2_cu
*cu
);
1727 /* Convert VALUE between big- and little-endian. */
1729 byte_swap (offset_type value
)
1733 result
= (value
& 0xff) << 24;
1734 result
|= (value
& 0xff00) << 8;
1735 result
|= (value
& 0xff0000) >> 8;
1736 result
|= (value
& 0xff000000) >> 24;
1740 #define MAYBE_SWAP(V) byte_swap (V)
1743 #define MAYBE_SWAP(V) (V)
1744 #endif /* WORDS_BIGENDIAN */
1746 /* The suffix for an index file. */
1747 #define INDEX_SUFFIX ".gdb-index"
1749 static const char *dwarf2_physname (char *name
, struct die_info
*die
,
1750 struct dwarf2_cu
*cu
);
1752 /* Try to locate the sections we need for DWARF 2 debugging
1753 information and return true if we have enough to do something.
1754 NAMES points to the dwarf2 section names, or is NULL if the standard
1755 ELF names are used. */
1758 dwarf2_has_info (struct objfile
*objfile
,
1759 const struct dwarf2_debug_sections
*names
)
1761 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1762 if (!dwarf2_per_objfile
)
1764 /* Initialize per-objfile state. */
1765 struct dwarf2_per_objfile
*data
1766 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1768 memset (data
, 0, sizeof (*data
));
1769 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1770 dwarf2_per_objfile
= data
;
1772 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
1774 dwarf2_per_objfile
->objfile
= objfile
;
1776 return (dwarf2_per_objfile
->info
.asection
!= NULL
1777 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1780 /* When loading sections, we look either for uncompressed section or for
1781 compressed section names. */
1784 section_is_p (const char *section_name
,
1785 const struct dwarf2_section_names
*names
)
1787 if (names
->normal
!= NULL
1788 && strcmp (section_name
, names
->normal
) == 0)
1790 if (names
->compressed
!= NULL
1791 && strcmp (section_name
, names
->compressed
) == 0)
1796 /* This function is mapped across the sections and remembers the
1797 offset and size of each of the debugging sections we are interested
1801 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
1803 const struct dwarf2_debug_sections
*names
;
1804 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
1807 names
= &dwarf2_elf_names
;
1809 names
= (const struct dwarf2_debug_sections
*) vnames
;
1811 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
1814 else if (section_is_p (sectp
->name
, &names
->info
))
1816 dwarf2_per_objfile
->info
.asection
= sectp
;
1817 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1819 else if (section_is_p (sectp
->name
, &names
->abbrev
))
1821 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1822 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1824 else if (section_is_p (sectp
->name
, &names
->line
))
1826 dwarf2_per_objfile
->line
.asection
= sectp
;
1827 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1829 else if (section_is_p (sectp
->name
, &names
->loc
))
1831 dwarf2_per_objfile
->loc
.asection
= sectp
;
1832 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1834 else if (section_is_p (sectp
->name
, &names
->macinfo
))
1836 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1837 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1839 else if (section_is_p (sectp
->name
, &names
->macro
))
1841 dwarf2_per_objfile
->macro
.asection
= sectp
;
1842 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
1844 else if (section_is_p (sectp
->name
, &names
->str
))
1846 dwarf2_per_objfile
->str
.asection
= sectp
;
1847 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1849 else if (section_is_p (sectp
->name
, &names
->addr
))
1851 dwarf2_per_objfile
->addr
.asection
= sectp
;
1852 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
1854 else if (section_is_p (sectp
->name
, &names
->frame
))
1856 dwarf2_per_objfile
->frame
.asection
= sectp
;
1857 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1859 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
1861 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1862 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1864 else if (section_is_p (sectp
->name
, &names
->ranges
))
1866 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1867 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1869 else if (section_is_p (sectp
->name
, &names
->types
))
1871 struct dwarf2_section_info type_section
;
1873 memset (&type_section
, 0, sizeof (type_section
));
1874 type_section
.asection
= sectp
;
1875 type_section
.size
= bfd_get_section_size (sectp
);
1877 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
1880 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
1882 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1883 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1886 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1887 && bfd_section_vma (abfd
, sectp
) == 0)
1888 dwarf2_per_objfile
->has_section_at_zero
= 1;
1891 /* A helper function that decides whether a section is empty,
1895 dwarf2_section_empty_p (struct dwarf2_section_info
*info
)
1897 return info
->asection
== NULL
|| info
->size
== 0;
1900 /* Read the contents of the section INFO.
1901 OBJFILE is the main object file, but not necessarily the file where
1902 the section comes from. E.g., for DWO files INFO->asection->owner
1903 is the bfd of the DWO file.
1904 If the section is compressed, uncompress it before returning. */
1907 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1909 asection
*sectp
= info
->asection
;
1911 gdb_byte
*buf
, *retbuf
;
1912 unsigned char header
[4];
1916 info
->buffer
= NULL
;
1919 if (dwarf2_section_empty_p (info
))
1922 abfd
= sectp
->owner
;
1924 /* If the section has relocations, we must read it ourselves.
1925 Otherwise we attach it to the BFD. */
1926 if ((sectp
->flags
& SEC_RELOC
) == 0)
1928 const gdb_byte
*bytes
= gdb_bfd_map_section (sectp
, &info
->size
);
1930 /* We have to cast away const here for historical reasons.
1931 Fixing dwarf2read to be const-correct would be quite nice. */
1932 info
->buffer
= (gdb_byte
*) bytes
;
1936 buf
= obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1939 /* When debugging .o files, we may need to apply relocations; see
1940 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1941 We never compress sections in .o files, so we only need to
1942 try this when the section is not compressed. */
1943 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1946 info
->buffer
= retbuf
;
1950 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1951 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1952 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1953 bfd_get_filename (abfd
));
1956 /* A helper function that returns the size of a section in a safe way.
1957 If you are positive that the section has been read before using the
1958 size, then it is safe to refer to the dwarf2_section_info object's
1959 "size" field directly. In other cases, you must call this
1960 function, because for compressed sections the size field is not set
1961 correctly until the section has been read. */
1963 static bfd_size_type
1964 dwarf2_section_size (struct objfile
*objfile
,
1965 struct dwarf2_section_info
*info
)
1968 dwarf2_read_section (objfile
, info
);
1972 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1976 dwarf2_get_section_info (struct objfile
*objfile
,
1977 enum dwarf2_section_enum sect
,
1978 asection
**sectp
, gdb_byte
**bufp
,
1979 bfd_size_type
*sizep
)
1981 struct dwarf2_per_objfile
*data
1982 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1983 struct dwarf2_section_info
*info
;
1985 /* We may see an objfile without any DWARF, in which case we just
1996 case DWARF2_DEBUG_FRAME
:
1997 info
= &data
->frame
;
1999 case DWARF2_EH_FRAME
:
2000 info
= &data
->eh_frame
;
2003 gdb_assert_not_reached ("unexpected section");
2006 dwarf2_read_section (objfile
, info
);
2008 *sectp
= info
->asection
;
2009 *bufp
= info
->buffer
;
2010 *sizep
= info
->size
;
2013 /* A helper function to find the sections for a .dwz file. */
2016 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2018 struct dwz_file
*dwz_file
= arg
;
2020 /* Note that we only support the standard ELF names, because .dwz
2021 is ELF-only (at the time of writing). */
2022 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2024 dwz_file
->abbrev
.asection
= sectp
;
2025 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2027 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2029 dwz_file
->info
.asection
= sectp
;
2030 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2032 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2034 dwz_file
->str
.asection
= sectp
;
2035 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2037 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2039 dwz_file
->line
.asection
= sectp
;
2040 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2042 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2044 dwz_file
->macro
.asection
= sectp
;
2045 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2047 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2049 dwz_file
->gdb_index
.asection
= sectp
;
2050 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2054 /* Open the separate '.dwz' debug file, if needed. Error if the file
2057 static struct dwz_file
*
2058 dwarf2_get_dwz_file (void)
2060 bfd
*abfd
, *dwz_bfd
;
2063 struct cleanup
*cleanup
;
2064 const char *filename
;
2065 struct dwz_file
*result
;
2067 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2068 return dwarf2_per_objfile
->dwz_file
;
2070 abfd
= dwarf2_per_objfile
->objfile
->obfd
;
2071 section
= bfd_get_section_by_name (abfd
, ".gnu_debugaltlink");
2072 if (section
== NULL
)
2073 error (_("could not find '.gnu_debugaltlink' section"));
2074 if (!bfd_malloc_and_get_section (abfd
, section
, &data
))
2075 error (_("could not read '.gnu_debugaltlink' section: %s"),
2076 bfd_errmsg (bfd_get_error ()));
2077 cleanup
= make_cleanup (xfree
, data
);
2080 if (!IS_ABSOLUTE_PATH (filename
))
2082 char *abs
= gdb_realpath (dwarf2_per_objfile
->objfile
->name
);
2085 make_cleanup (xfree
, abs
);
2086 abs
= ldirname (abs
);
2087 make_cleanup (xfree
, abs
);
2089 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2090 make_cleanup (xfree
, rel
);
2094 /* The format is just a NUL-terminated file name, followed by the
2095 build-id. For now, though, we ignore the build-id. */
2096 dwz_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2097 if (dwz_bfd
== NULL
)
2098 error (_("could not read '%s': %s"), filename
,
2099 bfd_errmsg (bfd_get_error ()));
2101 if (!bfd_check_format (dwz_bfd
, bfd_object
))
2103 gdb_bfd_unref (dwz_bfd
);
2104 error (_("file '%s' was not usable: %s"), filename
,
2105 bfd_errmsg (bfd_get_error ()));
2108 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2110 result
->dwz_bfd
= dwz_bfd
;
2112 bfd_map_over_sections (dwz_bfd
, locate_dwz_sections
, result
);
2114 do_cleanups (cleanup
);
2116 dwarf2_per_objfile
->dwz_file
= result
;
2120 /* DWARF quick_symbols_functions support. */
2122 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2123 unique line tables, so we maintain a separate table of all .debug_line
2124 derived entries to support the sharing.
2125 All the quick functions need is the list of file names. We discard the
2126 line_header when we're done and don't need to record it here. */
2127 struct quick_file_names
2129 /* The data used to construct the hash key. */
2130 struct stmt_list_hash hash
;
2132 /* The number of entries in file_names, real_names. */
2133 unsigned int num_file_names
;
2135 /* The file names from the line table, after being run through
2137 const char **file_names
;
2139 /* The file names from the line table after being run through
2140 gdb_realpath. These are computed lazily. */
2141 const char **real_names
;
2144 /* When using the index (and thus not using psymtabs), each CU has an
2145 object of this type. This is used to hold information needed by
2146 the various "quick" methods. */
2147 struct dwarf2_per_cu_quick_data
2149 /* The file table. This can be NULL if there was no file table
2150 or it's currently not read in.
2151 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2152 struct quick_file_names
*file_names
;
2154 /* The corresponding symbol table. This is NULL if symbols for this
2155 CU have not yet been read. */
2156 struct symtab
*symtab
;
2158 /* A temporary mark bit used when iterating over all CUs in
2159 expand_symtabs_matching. */
2160 unsigned int mark
: 1;
2162 /* True if we've tried to read the file table and found there isn't one.
2163 There will be no point in trying to read it again next time. */
2164 unsigned int no_file_data
: 1;
2167 /* Utility hash function for a stmt_list_hash. */
2170 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2174 if (stmt_list_hash
->dwo_unit
!= NULL
)
2175 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2176 v
+= stmt_list_hash
->line_offset
.sect_off
;
2180 /* Utility equality function for a stmt_list_hash. */
2183 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2184 const struct stmt_list_hash
*rhs
)
2186 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2188 if (lhs
->dwo_unit
!= NULL
2189 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2192 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2195 /* Hash function for a quick_file_names. */
2198 hash_file_name_entry (const void *e
)
2200 const struct quick_file_names
*file_data
= e
;
2202 return hash_stmt_list_entry (&file_data
->hash
);
2205 /* Equality function for a quick_file_names. */
2208 eq_file_name_entry (const void *a
, const void *b
)
2210 const struct quick_file_names
*ea
= a
;
2211 const struct quick_file_names
*eb
= b
;
2213 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2216 /* Delete function for a quick_file_names. */
2219 delete_file_name_entry (void *e
)
2221 struct quick_file_names
*file_data
= e
;
2224 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2226 xfree ((void*) file_data
->file_names
[i
]);
2227 if (file_data
->real_names
)
2228 xfree ((void*) file_data
->real_names
[i
]);
2231 /* The space for the struct itself lives on objfile_obstack,
2232 so we don't free it here. */
2235 /* Create a quick_file_names hash table. */
2238 create_quick_file_names_table (unsigned int nr_initial_entries
)
2240 return htab_create_alloc (nr_initial_entries
,
2241 hash_file_name_entry
, eq_file_name_entry
,
2242 delete_file_name_entry
, xcalloc
, xfree
);
2245 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2246 have to be created afterwards. You should call age_cached_comp_units after
2247 processing PER_CU->CU. dw2_setup must have been already called. */
2250 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2252 if (per_cu
->is_debug_types
)
2253 load_full_type_unit (per_cu
);
2255 load_full_comp_unit (per_cu
, language_minimal
);
2257 gdb_assert (per_cu
->cu
!= NULL
);
2259 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2262 /* Read in the symbols for PER_CU. */
2265 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2267 struct cleanup
*back_to
;
2269 /* Skip type_unit_groups, reading the type units they contain
2270 is handled elsewhere. */
2271 if (IS_TYPE_UNIT_GROUP (per_cu
))
2274 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2276 if (dwarf2_per_objfile
->using_index
2277 ? per_cu
->v
.quick
->symtab
== NULL
2278 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2280 queue_comp_unit (per_cu
, language_minimal
);
2286 /* Age the cache, releasing compilation units that have not
2287 been used recently. */
2288 age_cached_comp_units ();
2290 do_cleanups (back_to
);
2293 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2294 the objfile from which this CU came. Returns the resulting symbol
2297 static struct symtab
*
2298 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2300 gdb_assert (dwarf2_per_objfile
->using_index
);
2301 if (!per_cu
->v
.quick
->symtab
)
2303 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2304 increment_reading_symtab ();
2305 dw2_do_instantiate_symtab (per_cu
);
2306 process_cu_includes ();
2307 do_cleanups (back_to
);
2309 return per_cu
->v
.quick
->symtab
;
2312 /* Return the CU given its index.
2314 This is intended for loops like:
2316 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2317 + dwarf2_per_objfile->n_type_units); ++i)
2319 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2325 static struct dwarf2_per_cu_data
*
2326 dw2_get_cu (int index
)
2328 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2330 index
-= dwarf2_per_objfile
->n_comp_units
;
2331 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2332 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2335 return dwarf2_per_objfile
->all_comp_units
[index
];
2338 /* Return the primary CU given its index.
2339 The difference between this function and dw2_get_cu is in the handling
2340 of type units (TUs). Here we return the type_unit_group object.
2342 This is intended for loops like:
2344 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2345 + dwarf2_per_objfile->n_type_unit_groups); ++i)
2347 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
2353 static struct dwarf2_per_cu_data
*
2354 dw2_get_primary_cu (int index
)
2356 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2358 index
-= dwarf2_per_objfile
->n_comp_units
;
2359 gdb_assert (index
< dwarf2_per_objfile
->n_type_unit_groups
);
2360 return &dwarf2_per_objfile
->all_type_unit_groups
[index
]->per_cu
;
2363 return dwarf2_per_objfile
->all_comp_units
[index
];
2366 /* A helper for create_cus_from_index that handles a given list of
2370 create_cus_from_index_list (struct objfile
*objfile
,
2371 const gdb_byte
*cu_list
, offset_type n_elements
,
2372 struct dwarf2_section_info
*section
,
2378 for (i
= 0; i
< n_elements
; i
+= 2)
2380 struct dwarf2_per_cu_data
*the_cu
;
2381 ULONGEST offset
, length
;
2383 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2384 offset
= extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2385 length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2388 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2389 struct dwarf2_per_cu_data
);
2390 the_cu
->offset
.sect_off
= offset
;
2391 the_cu
->length
= length
;
2392 the_cu
->objfile
= objfile
;
2393 the_cu
->info_or_types_section
= section
;
2394 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2395 struct dwarf2_per_cu_quick_data
);
2396 the_cu
->is_dwz
= is_dwz
;
2397 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2401 /* Read the CU list from the mapped index, and use it to create all
2402 the CU objects for this objfile. */
2405 create_cus_from_index (struct objfile
*objfile
,
2406 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2407 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2409 struct dwz_file
*dwz
;
2411 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2412 dwarf2_per_objfile
->all_comp_units
2413 = obstack_alloc (&objfile
->objfile_obstack
,
2414 dwarf2_per_objfile
->n_comp_units
2415 * sizeof (struct dwarf2_per_cu_data
*));
2417 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2418 &dwarf2_per_objfile
->info
, 0, 0);
2420 if (dwz_elements
== 0)
2423 dwz
= dwarf2_get_dwz_file ();
2424 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
2425 cu_list_elements
/ 2);
2428 /* Create the signatured type hash table from the index. */
2431 create_signatured_type_table_from_index (struct objfile
*objfile
,
2432 struct dwarf2_section_info
*section
,
2433 const gdb_byte
*bytes
,
2434 offset_type elements
)
2437 htab_t sig_types_hash
;
2439 dwarf2_per_objfile
->n_type_units
= elements
/ 3;
2440 dwarf2_per_objfile
->all_type_units
2441 = obstack_alloc (&objfile
->objfile_obstack
,
2442 dwarf2_per_objfile
->n_type_units
2443 * sizeof (struct signatured_type
*));
2445 sig_types_hash
= allocate_signatured_type_table (objfile
);
2447 for (i
= 0; i
< elements
; i
+= 3)
2449 struct signatured_type
*sig_type
;
2450 ULONGEST offset
, type_offset_in_tu
, signature
;
2453 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2454 offset
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2455 type_offset_in_tu
= extract_unsigned_integer (bytes
+ 8, 8,
2457 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2460 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2461 struct signatured_type
);
2462 sig_type
->signature
= signature
;
2463 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2464 sig_type
->per_cu
.is_debug_types
= 1;
2465 sig_type
->per_cu
.info_or_types_section
= section
;
2466 sig_type
->per_cu
.offset
.sect_off
= offset
;
2467 sig_type
->per_cu
.objfile
= objfile
;
2468 sig_type
->per_cu
.v
.quick
2469 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2470 struct dwarf2_per_cu_quick_data
);
2472 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2475 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2478 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2481 /* Read the address map data from the mapped index, and use it to
2482 populate the objfile's psymtabs_addrmap. */
2485 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2487 const gdb_byte
*iter
, *end
;
2488 struct obstack temp_obstack
;
2489 struct addrmap
*mutable_map
;
2490 struct cleanup
*cleanup
;
2493 obstack_init (&temp_obstack
);
2494 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2495 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2497 iter
= index
->address_table
;
2498 end
= iter
+ index
->address_table_size
;
2500 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2504 ULONGEST hi
, lo
, cu_index
;
2505 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2507 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2509 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2512 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
2513 dw2_get_cu (cu_index
));
2516 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2517 &objfile
->objfile_obstack
);
2518 do_cleanups (cleanup
);
2521 /* The hash function for strings in the mapped index. This is the same as
2522 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2523 implementation. This is necessary because the hash function is tied to the
2524 format of the mapped index file. The hash values do not have to match with
2527 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2530 mapped_index_string_hash (int index_version
, const void *p
)
2532 const unsigned char *str
= (const unsigned char *) p
;
2536 while ((c
= *str
++) != 0)
2538 if (index_version
>= 5)
2540 r
= r
* 67 + c
- 113;
2546 /* Find a slot in the mapped index INDEX for the object named NAME.
2547 If NAME is found, set *VEC_OUT to point to the CU vector in the
2548 constant pool and return 1. If NAME cannot be found, return 0. */
2551 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2552 offset_type
**vec_out
)
2554 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2556 offset_type slot
, step
;
2557 int (*cmp
) (const char *, const char *);
2559 if (current_language
->la_language
== language_cplus
2560 || current_language
->la_language
== language_java
2561 || current_language
->la_language
== language_fortran
)
2563 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2565 const char *paren
= strchr (name
, '(');
2571 dup
= xmalloc (paren
- name
+ 1);
2572 memcpy (dup
, name
, paren
- name
);
2573 dup
[paren
- name
] = 0;
2575 make_cleanup (xfree
, dup
);
2580 /* Index version 4 did not support case insensitive searches. But the
2581 indices for case insensitive languages are built in lowercase, therefore
2582 simulate our NAME being searched is also lowercased. */
2583 hash
= mapped_index_string_hash ((index
->version
== 4
2584 && case_sensitivity
== case_sensitive_off
2585 ? 5 : index
->version
),
2588 slot
= hash
& (index
->symbol_table_slots
- 1);
2589 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
2590 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2594 /* Convert a slot number to an offset into the table. */
2595 offset_type i
= 2 * slot
;
2597 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
2599 do_cleanups (back_to
);
2603 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
2604 if (!cmp (name
, str
))
2606 *vec_out
= (offset_type
*) (index
->constant_pool
2607 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
2608 do_cleanups (back_to
);
2612 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
2616 /* A helper function that reads the .gdb_index from SECTION and fills
2617 in MAP. FILENAME is the name of the file containing the section;
2618 it is used for error reporting. DEPRECATED_OK is nonzero if it is
2619 ok to use deprecated sections.
2621 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2622 out parameters that are filled in with information about the CU and
2623 TU lists in the section.
2625 Returns 1 if all went well, 0 otherwise. */
2628 read_index_from_section (struct objfile
*objfile
,
2629 const char *filename
,
2631 struct dwarf2_section_info
*section
,
2632 struct mapped_index
*map
,
2633 const gdb_byte
**cu_list
,
2634 offset_type
*cu_list_elements
,
2635 const gdb_byte
**types_list
,
2636 offset_type
*types_list_elements
)
2639 offset_type version
;
2640 offset_type
*metadata
;
2643 if (dwarf2_section_empty_p (section
))
2646 /* Older elfutils strip versions could keep the section in the main
2647 executable while splitting it for the separate debug info file. */
2648 if ((bfd_get_file_flags (section
->asection
) & SEC_HAS_CONTENTS
) == 0)
2651 dwarf2_read_section (objfile
, section
);
2653 addr
= section
->buffer
;
2654 /* Version check. */
2655 version
= MAYBE_SWAP (*(offset_type
*) addr
);
2656 /* Versions earlier than 3 emitted every copy of a psymbol. This
2657 causes the index to behave very poorly for certain requests. Version 3
2658 contained incomplete addrmap. So, it seems better to just ignore such
2662 static int warning_printed
= 0;
2663 if (!warning_printed
)
2665 warning (_("Skipping obsolete .gdb_index section in %s."),
2667 warning_printed
= 1;
2671 /* Index version 4 uses a different hash function than index version
2674 Versions earlier than 6 did not emit psymbols for inlined
2675 functions. Using these files will cause GDB not to be able to
2676 set breakpoints on inlined functions by name, so we ignore these
2677 indices unless the user has done
2678 "set use-deprecated-index-sections on". */
2679 if (version
< 6 && !deprecated_ok
)
2681 static int warning_printed
= 0;
2682 if (!warning_printed
)
2685 Skipping deprecated .gdb_index section in %s.\n\
2686 Do \"set use-deprecated-index-sections on\" before the file is read\n\
2687 to use the section anyway."),
2689 warning_printed
= 1;
2693 /* Indexes with higher version than the one supported by GDB may be no
2694 longer backward compatible. */
2698 map
->version
= version
;
2699 map
->total_size
= section
->size
;
2701 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2704 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2705 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2709 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2710 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2711 - MAYBE_SWAP (metadata
[i
]))
2715 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2716 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
2717 - MAYBE_SWAP (metadata
[i
]));
2720 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
2721 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
2722 - MAYBE_SWAP (metadata
[i
]))
2723 / (2 * sizeof (offset_type
)));
2726 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
2732 /* Read the index file. If everything went ok, initialize the "quick"
2733 elements of all the CUs and return 1. Otherwise, return 0. */
2736 dwarf2_read_index (struct objfile
*objfile
)
2738 struct mapped_index local_map
, *map
;
2739 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
2740 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
2742 if (!read_index_from_section (objfile
, objfile
->name
,
2743 use_deprecated_index_sections
,
2744 &dwarf2_per_objfile
->gdb_index
, &local_map
,
2745 &cu_list
, &cu_list_elements
,
2746 &types_list
, &types_list_elements
))
2749 /* Don't use the index if it's empty. */
2750 if (local_map
.symbol_table_slots
== 0)
2753 /* If there is a .dwz file, read it so we can get its CU list as
2755 if (bfd_get_section_by_name (objfile
->obfd
, ".gnu_debugaltlink") != NULL
)
2757 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
2758 struct mapped_index dwz_map
;
2759 const gdb_byte
*dwz_types_ignore
;
2760 offset_type dwz_types_elements_ignore
;
2762 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
2764 &dwz
->gdb_index
, &dwz_map
,
2765 &dwz_list
, &dwz_list_elements
,
2767 &dwz_types_elements_ignore
))
2769 warning (_("could not read '.gdb_index' section from %s; skipping"),
2770 bfd_get_filename (dwz
->dwz_bfd
));
2775 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
2778 if (types_list_elements
)
2780 struct dwarf2_section_info
*section
;
2782 /* We can only handle a single .debug_types when we have an
2784 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
2787 section
= VEC_index (dwarf2_section_info_def
,
2788 dwarf2_per_objfile
->types
, 0);
2790 create_signatured_type_table_from_index (objfile
, section
, types_list
,
2791 types_list_elements
);
2794 create_addrmap_from_index (objfile
, &local_map
);
2796 map
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct mapped_index
));
2799 dwarf2_per_objfile
->index_table
= map
;
2800 dwarf2_per_objfile
->using_index
= 1;
2801 dwarf2_per_objfile
->quick_file_names_table
=
2802 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2807 /* A helper for the "quick" functions which sets the global
2808 dwarf2_per_objfile according to OBJFILE. */
2811 dw2_setup (struct objfile
*objfile
)
2813 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2814 gdb_assert (dwarf2_per_objfile
);
2817 /* Reader function for dw2_build_type_unit_groups. */
2820 dw2_build_type_unit_groups_reader (const struct die_reader_specs
*reader
,
2822 struct die_info
*type_unit_die
,
2826 struct dwarf2_cu
*cu
= reader
->cu
;
2827 struct attribute
*attr
;
2828 struct type_unit_group
*tu_group
;
2830 gdb_assert (data
== NULL
);
2835 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
2836 /* Call this for its side-effect of creating the associated
2837 struct type_unit_group if it doesn't already exist. */
2838 tu_group
= get_type_unit_group (cu
, attr
);
2841 /* Build dwarf2_per_objfile->type_unit_groups.
2842 This function may be called multiple times. */
2845 dw2_build_type_unit_groups (void)
2847 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
2848 build_type_unit_groups (dw2_build_type_unit_groups_reader
, NULL
);
2851 /* die_reader_func for dw2_get_file_names. */
2854 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
2856 struct die_info
*comp_unit_die
,
2860 struct dwarf2_cu
*cu
= reader
->cu
;
2861 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
2862 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2863 struct dwarf2_per_cu_data
*lh_cu
;
2864 struct line_header
*lh
;
2865 struct attribute
*attr
;
2867 char *name
, *comp_dir
;
2869 struct quick_file_names
*qfn
;
2870 unsigned int line_offset
;
2872 /* Our callers never want to match partial units -- instead they
2873 will match the enclosing full CU. */
2874 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
2876 this_cu
->v
.quick
->no_file_data
= 1;
2880 /* If we're reading the line header for TUs, store it in the "per_cu"
2882 if (this_cu
->is_debug_types
)
2884 struct type_unit_group
*tu_group
= data
;
2886 gdb_assert (tu_group
!= NULL
);
2887 lh_cu
= &tu_group
->per_cu
;
2896 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
2899 struct quick_file_names find_entry
;
2901 line_offset
= DW_UNSND (attr
);
2903 /* We may have already read in this line header (TU line header sharing).
2904 If we have we're done. */
2905 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
2906 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
2907 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
2908 &find_entry
, INSERT
);
2911 lh_cu
->v
.quick
->file_names
= *slot
;
2915 lh
= dwarf_decode_line_header (line_offset
, cu
);
2919 lh_cu
->v
.quick
->no_file_data
= 1;
2923 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
2924 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
2925 qfn
->hash
.line_offset
.sect_off
= line_offset
;
2926 gdb_assert (slot
!= NULL
);
2929 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
2931 qfn
->num_file_names
= lh
->num_file_names
;
2932 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
2933 lh
->num_file_names
* sizeof (char *));
2934 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2935 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2936 qfn
->real_names
= NULL
;
2938 free_line_header (lh
);
2940 lh_cu
->v
.quick
->file_names
= qfn
;
2943 /* A helper for the "quick" functions which attempts to read the line
2944 table for THIS_CU. */
2946 static struct quick_file_names
*
2947 dw2_get_file_names (struct objfile
*objfile
,
2948 struct dwarf2_per_cu_data
*this_cu
)
2950 /* For TUs this should only be called on the parent group. */
2951 if (this_cu
->is_debug_types
)
2952 gdb_assert (IS_TYPE_UNIT_GROUP (this_cu
));
2954 if (this_cu
->v
.quick
->file_names
!= NULL
)
2955 return this_cu
->v
.quick
->file_names
;
2956 /* If we know there is no line data, no point in looking again. */
2957 if (this_cu
->v
.quick
->no_file_data
)
2960 /* If DWO files are in use, we can still find the DW_AT_stmt_list attribute
2961 in the stub for CUs, there's is no need to lookup the DWO file.
2962 However, that's not the case for TUs where DW_AT_stmt_list lives in the
2964 if (this_cu
->is_debug_types
)
2966 struct type_unit_group
*tu_group
= this_cu
->s
.type_unit_group
;
2968 init_cutu_and_read_dies (tu_group
->t
.first_tu
, NULL
, 0, 0,
2969 dw2_get_file_names_reader
, tu_group
);
2972 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
2974 if (this_cu
->v
.quick
->no_file_data
)
2976 return this_cu
->v
.quick
->file_names
;
2979 /* A helper for the "quick" functions which computes and caches the
2980 real path for a given file name from the line table. */
2983 dw2_get_real_path (struct objfile
*objfile
,
2984 struct quick_file_names
*qfn
, int index
)
2986 if (qfn
->real_names
== NULL
)
2987 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2988 qfn
->num_file_names
, sizeof (char *));
2990 if (qfn
->real_names
[index
] == NULL
)
2991 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
2993 return qfn
->real_names
[index
];
2996 static struct symtab
*
2997 dw2_find_last_source_symtab (struct objfile
*objfile
)
3001 dw2_setup (objfile
);
3002 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3003 return dw2_instantiate_symtab (dw2_get_cu (index
));
3006 /* Traversal function for dw2_forget_cached_source_info. */
3009 dw2_free_cached_file_names (void **slot
, void *info
)
3011 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3013 if (file_data
->real_names
)
3017 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3019 xfree ((void*) file_data
->real_names
[i
]);
3020 file_data
->real_names
[i
] = NULL
;
3028 dw2_forget_cached_source_info (struct objfile
*objfile
)
3030 dw2_setup (objfile
);
3032 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3033 dw2_free_cached_file_names
, NULL
);
3036 /* Helper function for dw2_map_symtabs_matching_filename that expands
3037 the symtabs and calls the iterator. */
3040 dw2_map_expand_apply (struct objfile
*objfile
,
3041 struct dwarf2_per_cu_data
*per_cu
,
3043 const char *full_path
, const char *real_path
,
3044 int (*callback
) (struct symtab
*, void *),
3047 struct symtab
*last_made
= objfile
->symtabs
;
3049 /* Don't visit already-expanded CUs. */
3050 if (per_cu
->v
.quick
->symtab
)
3053 /* This may expand more than one symtab, and we want to iterate over
3055 dw2_instantiate_symtab (per_cu
);
3057 return iterate_over_some_symtabs (name
, full_path
, real_path
, callback
, data
,
3058 objfile
->symtabs
, last_made
);
3061 /* Implementation of the map_symtabs_matching_filename method. */
3064 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3065 const char *full_path
, const char *real_path
,
3066 int (*callback
) (struct symtab
*, void *),
3070 const char *name_basename
= lbasename (name
);
3071 int name_len
= strlen (name
);
3072 int is_abs
= IS_ABSOLUTE_PATH (name
);
3074 dw2_setup (objfile
);
3076 dw2_build_type_unit_groups ();
3078 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3079 + dwarf2_per_objfile
->n_type_unit_groups
); ++i
)
3082 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3083 struct quick_file_names
*file_data
;
3085 /* We only need to look at symtabs not already expanded. */
3086 if (per_cu
->v
.quick
->symtab
)
3089 file_data
= dw2_get_file_names (objfile
, per_cu
);
3090 if (file_data
== NULL
)
3093 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3095 const char *this_name
= file_data
->file_names
[j
];
3097 if (FILENAME_CMP (name
, this_name
) == 0
3098 || (!is_abs
&& compare_filenames_for_search (this_name
,
3101 if (dw2_map_expand_apply (objfile
, per_cu
,
3102 name
, full_path
, real_path
,
3107 /* Before we invoke realpath, which can get expensive when many
3108 files are involved, do a quick comparison of the basenames. */
3109 if (! basenames_may_differ
3110 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3113 if (full_path
!= NULL
)
3115 const char *this_real_name
= dw2_get_real_path (objfile
,
3118 if (this_real_name
!= NULL
3119 && (FILENAME_CMP (full_path
, this_real_name
) == 0
3121 && compare_filenames_for_search (this_real_name
,
3124 if (dw2_map_expand_apply (objfile
, per_cu
,
3125 name
, full_path
, real_path
,
3131 if (real_path
!= NULL
)
3133 const char *this_real_name
= dw2_get_real_path (objfile
,
3136 if (this_real_name
!= NULL
3137 && (FILENAME_CMP (real_path
, this_real_name
) == 0
3139 && compare_filenames_for_search (this_real_name
,
3142 if (dw2_map_expand_apply (objfile
, per_cu
,
3143 name
, full_path
, real_path
,
3154 static struct symtab
*
3155 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3156 const char *name
, domain_enum domain
)
3158 /* We do all the work in the pre_expand_symtabs_matching hook
3163 /* A helper function that expands all symtabs that hold an object
3164 named NAME. If WANT_SPECIFIC_BLOCK is non-zero, only look for
3165 symbols in block BLOCK_KIND. */
3168 dw2_do_expand_symtabs_matching (struct objfile
*objfile
,
3169 int want_specific_block
,
3170 enum block_enum block_kind
,
3171 const char *name
, domain_enum domain
)
3173 struct mapped_index
*index
;
3175 dw2_setup (objfile
);
3177 index
= dwarf2_per_objfile
->index_table
;
3179 /* index_table is NULL if OBJF_READNOW. */
3184 if (find_slot_in_mapped_hash (index
, name
, &vec
))
3186 offset_type i
, len
= MAYBE_SWAP (*vec
);
3187 for (i
= 0; i
< len
; ++i
)
3189 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[i
+ 1]);
3190 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3191 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
3192 int want_static
= block_kind
!= GLOBAL_BLOCK
;
3193 /* This value is only valid for index versions >= 7. */
3194 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3195 gdb_index_symbol_kind symbol_kind
=
3196 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3197 /* Only check the symbol attributes if they're present.
3198 Indices prior to version 7 don't record them,
3199 and indices >= 7 may elide them for certain symbols
3200 (gold does this). */
3202 (index
->version
>= 7
3203 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3206 && want_specific_block
3207 && want_static
!= is_static
)
3210 /* Only check the symbol's kind if it has one. */
3216 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3217 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3218 /* Some types are also in VAR_DOMAIN. */
3219 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3223 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3227 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3235 dw2_instantiate_symtab (per_cu
);
3242 dw2_pre_expand_symtabs_matching (struct objfile
*objfile
,
3243 enum block_enum block_kind
, const char *name
,
3246 dw2_do_expand_symtabs_matching (objfile
, 1, block_kind
, name
, domain
);
3250 dw2_print_stats (struct objfile
*objfile
)
3254 dw2_setup (objfile
);
3256 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3257 + dwarf2_per_objfile
->n_type_units
); ++i
)
3259 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3261 if (!per_cu
->v
.quick
->symtab
)
3264 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3268 dw2_dump (struct objfile
*objfile
)
3270 /* Nothing worth printing. */
3274 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
3275 struct section_offsets
*delta
)
3277 /* There's nothing to relocate here. */
3281 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3282 const char *func_name
)
3284 /* Note: It doesn't matter what we pass for block_kind here. */
3285 dw2_do_expand_symtabs_matching (objfile
, 0, GLOBAL_BLOCK
, func_name
,
3290 dw2_expand_all_symtabs (struct objfile
*objfile
)
3294 dw2_setup (objfile
);
3296 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3297 + dwarf2_per_objfile
->n_type_units
); ++i
)
3299 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3301 dw2_instantiate_symtab (per_cu
);
3306 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
3307 const char *filename
)
3311 dw2_setup (objfile
);
3313 /* We don't need to consider type units here.
3314 This is only called for examining code, e.g. expand_line_sal.
3315 There can be an order of magnitude (or more) more type units
3316 than comp units, and we avoid them if we can. */
3318 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3321 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3322 struct quick_file_names
*file_data
;
3324 /* We only need to look at symtabs not already expanded. */
3325 if (per_cu
->v
.quick
->symtab
)
3328 file_data
= dw2_get_file_names (objfile
, per_cu
);
3329 if (file_data
== NULL
)
3332 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3334 const char *this_name
= file_data
->file_names
[j
];
3335 if (FILENAME_CMP (this_name
, filename
) == 0)
3337 dw2_instantiate_symtab (per_cu
);
3344 /* A helper function for dw2_find_symbol_file that finds the primary
3345 file name for a given CU. This is a die_reader_func. */
3348 dw2_get_primary_filename_reader (const struct die_reader_specs
*reader
,
3350 struct die_info
*comp_unit_die
,
3354 const char **result_ptr
= data
;
3355 struct dwarf2_cu
*cu
= reader
->cu
;
3356 struct attribute
*attr
;
3358 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
3362 *result_ptr
= DW_STRING (attr
);
3366 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
3368 struct dwarf2_per_cu_data
*per_cu
;
3370 const char *filename
;
3372 dw2_setup (objfile
);
3374 /* index_table is NULL if OBJF_READNOW. */
3375 if (!dwarf2_per_objfile
->index_table
)
3379 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
3381 struct blockvector
*bv
= BLOCKVECTOR (s
);
3382 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
3383 struct symbol
*sym
= lookup_block_symbol (block
, name
, VAR_DOMAIN
);
3386 return SYMBOL_SYMTAB (sym
)->filename
;
3391 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
3395 /* Note that this just looks at the very first one named NAME -- but
3396 actually we are looking for a function. find_main_filename
3397 should be rewritten so that it doesn't require a custom hook. It
3398 could just use the ordinary symbol tables. */
3399 /* vec[0] is the length, which must always be >0. */
3400 per_cu
= dw2_get_cu (GDB_INDEX_CU_VALUE (MAYBE_SWAP (vec
[1])));
3402 if (per_cu
->v
.quick
->symtab
!= NULL
)
3403 return per_cu
->v
.quick
->symtab
->filename
;
3405 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
3406 dw2_get_primary_filename_reader
, &filename
);
3412 dw2_map_matching_symbols (const char * name
, domain_enum
namespace,
3413 struct objfile
*objfile
, int global
,
3414 int (*callback
) (struct block
*,
3415 struct symbol
*, void *),
3416 void *data
, symbol_compare_ftype
*match
,
3417 symbol_compare_ftype
*ordered_compare
)
3419 /* Currently unimplemented; used for Ada. The function can be called if the
3420 current language is Ada for a non-Ada objfile using GNU index. As Ada
3421 does not look for non-Ada symbols this function should just return. */
3425 dw2_expand_symtabs_matching
3426 (struct objfile
*objfile
,
3427 int (*file_matcher
) (const char *, void *),
3428 int (*name_matcher
) (const char *, void *),
3429 enum search_domain kind
,
3434 struct mapped_index
*index
;
3436 dw2_setup (objfile
);
3438 /* index_table is NULL if OBJF_READNOW. */
3439 if (!dwarf2_per_objfile
->index_table
)
3441 index
= dwarf2_per_objfile
->index_table
;
3443 if (file_matcher
!= NULL
)
3445 struct cleanup
*cleanup
;
3446 htab_t visited_found
, visited_not_found
;
3448 dw2_build_type_unit_groups ();
3450 visited_found
= htab_create_alloc (10,
3451 htab_hash_pointer
, htab_eq_pointer
,
3452 NULL
, xcalloc
, xfree
);
3453 cleanup
= make_cleanup_htab_delete (visited_found
);
3454 visited_not_found
= htab_create_alloc (10,
3455 htab_hash_pointer
, htab_eq_pointer
,
3456 NULL
, xcalloc
, xfree
);
3457 make_cleanup_htab_delete (visited_not_found
);
3459 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3460 + dwarf2_per_objfile
->n_type_unit_groups
); ++i
)
3463 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3464 struct quick_file_names
*file_data
;
3467 per_cu
->v
.quick
->mark
= 0;
3469 /* We only need to look at symtabs not already expanded. */
3470 if (per_cu
->v
.quick
->symtab
)
3473 file_data
= dw2_get_file_names (objfile
, per_cu
);
3474 if (file_data
== NULL
)
3477 if (htab_find (visited_not_found
, file_data
) != NULL
)
3479 else if (htab_find (visited_found
, file_data
) != NULL
)
3481 per_cu
->v
.quick
->mark
= 1;
3485 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3487 if (file_matcher (file_data
->file_names
[j
], data
))
3489 per_cu
->v
.quick
->mark
= 1;
3494 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3496 : visited_not_found
,
3501 do_cleanups (cleanup
);
3504 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3506 offset_type idx
= 2 * iter
;
3508 offset_type
*vec
, vec_len
, vec_idx
;
3510 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3513 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3515 if (! (*name_matcher
) (name
, data
))
3518 /* The name was matched, now expand corresponding CUs that were
3520 vec
= (offset_type
*) (index
->constant_pool
3521 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3522 vec_len
= MAYBE_SWAP (vec
[0]);
3523 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3525 struct dwarf2_per_cu_data
*per_cu
;
3526 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3527 gdb_index_symbol_kind symbol_kind
=
3528 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3529 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3531 /* Don't crash on bad data. */
3532 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3533 + dwarf2_per_objfile
->n_type_units
))
3536 /* Only check the symbol's kind if it has one.
3537 Indices prior to version 7 don't record it. */
3538 if (index
->version
>= 7)
3542 case VARIABLES_DOMAIN
:
3543 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
3546 case FUNCTIONS_DOMAIN
:
3547 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
3551 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3559 per_cu
= dw2_get_cu (cu_index
);
3560 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
3561 dw2_instantiate_symtab (per_cu
);
3566 /* A helper for dw2_find_pc_sect_symtab which finds the most specific
3569 static struct symtab
*
3570 recursively_find_pc_sect_symtab (struct symtab
*symtab
, CORE_ADDR pc
)
3574 if (BLOCKVECTOR (symtab
) != NULL
3575 && blockvector_contains_pc (BLOCKVECTOR (symtab
), pc
))
3578 if (symtab
->includes
== NULL
)
3581 for (i
= 0; symtab
->includes
[i
]; ++i
)
3583 struct symtab
*s
= symtab
->includes
[i
];
3585 s
= recursively_find_pc_sect_symtab (s
, pc
);
3593 static struct symtab
*
3594 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
3595 struct minimal_symbol
*msymbol
,
3597 struct obj_section
*section
,
3600 struct dwarf2_per_cu_data
*data
;
3601 struct symtab
*result
;
3603 dw2_setup (objfile
);
3605 if (!objfile
->psymtabs_addrmap
)
3608 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
3612 if (warn_if_readin
&& data
->v
.quick
->symtab
)
3613 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
3614 paddress (get_objfile_arch (objfile
), pc
));
3616 result
= recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data
), pc
);
3617 gdb_assert (result
!= NULL
);
3622 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
3623 void *data
, int need_fullname
)
3626 struct cleanup
*cleanup
;
3627 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
3628 NULL
, xcalloc
, xfree
);
3630 cleanup
= make_cleanup_htab_delete (visited
);
3631 dw2_setup (objfile
);
3633 dw2_build_type_unit_groups ();
3635 /* We can ignore file names coming from already-expanded CUs. */
3636 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3637 + dwarf2_per_objfile
->n_type_units
); ++i
)
3639 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3641 if (per_cu
->v
.quick
->symtab
)
3643 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
3646 *slot
= per_cu
->v
.quick
->file_names
;
3650 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3651 + dwarf2_per_objfile
->n_type_unit_groups
); ++i
)
3654 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3655 struct quick_file_names
*file_data
;
3658 /* We only need to look at symtabs not already expanded. */
3659 if (per_cu
->v
.quick
->symtab
)
3662 file_data
= dw2_get_file_names (objfile
, per_cu
);
3663 if (file_data
== NULL
)
3666 slot
= htab_find_slot (visited
, file_data
, INSERT
);
3669 /* Already visited. */
3674 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3676 const char *this_real_name
;
3679 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3681 this_real_name
= NULL
;
3682 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
3686 do_cleanups (cleanup
);
3690 dw2_has_symbols (struct objfile
*objfile
)
3695 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
3698 dw2_find_last_source_symtab
,
3699 dw2_forget_cached_source_info
,
3700 dw2_map_symtabs_matching_filename
,
3702 dw2_pre_expand_symtabs_matching
,
3706 dw2_expand_symtabs_for_function
,
3707 dw2_expand_all_symtabs
,
3708 dw2_expand_symtabs_with_filename
,
3709 dw2_find_symbol_file
,
3710 dw2_map_matching_symbols
,
3711 dw2_expand_symtabs_matching
,
3712 dw2_find_pc_sect_symtab
,
3713 dw2_map_symbol_filenames
3716 /* Initialize for reading DWARF for this objfile. Return 0 if this
3717 file will use psymtabs, or 1 if using the GNU index. */
3720 dwarf2_initialize_objfile (struct objfile
*objfile
)
3722 /* If we're about to read full symbols, don't bother with the
3723 indices. In this case we also don't care if some other debug
3724 format is making psymtabs, because they are all about to be
3726 if ((objfile
->flags
& OBJF_READNOW
))
3730 dwarf2_per_objfile
->using_index
= 1;
3731 create_all_comp_units (objfile
);
3732 create_all_type_units (objfile
);
3733 dwarf2_per_objfile
->quick_file_names_table
=
3734 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3736 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3737 + dwarf2_per_objfile
->n_type_units
); ++i
)
3739 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3741 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3742 struct dwarf2_per_cu_quick_data
);
3745 /* Return 1 so that gdb sees the "quick" functions. However,
3746 these functions will be no-ops because we will have expanded
3751 if (dwarf2_read_index (objfile
))
3759 /* Build a partial symbol table. */
3762 dwarf2_build_psymtabs (struct objfile
*objfile
)
3764 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
3766 init_psymbol_list (objfile
, 1024);
3769 dwarf2_build_psymtabs_hard (objfile
);
3772 /* Return the total length of the CU described by HEADER. */
3775 get_cu_length (const struct comp_unit_head
*header
)
3777 return header
->initial_length_size
+ header
->length
;
3780 /* Return TRUE if OFFSET is within CU_HEADER. */
3783 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
3785 sect_offset bottom
= { cu_header
->offset
.sect_off
};
3786 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
3788 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
3791 /* Find the base address of the compilation unit for range lists and
3792 location lists. It will normally be specified by DW_AT_low_pc.
3793 In DWARF-3 draft 4, the base address could be overridden by
3794 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3795 compilation units with discontinuous ranges. */
3798 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
3800 struct attribute
*attr
;
3803 cu
->base_address
= 0;
3805 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3808 cu
->base_address
= DW_ADDR (attr
);
3813 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3816 cu
->base_address
= DW_ADDR (attr
);
3822 /* Read in the comp unit header information from the debug_info at info_ptr.
3823 NOTE: This leaves members offset, first_die_offset to be filled in
3827 read_comp_unit_head (struct comp_unit_head
*cu_header
,
3828 gdb_byte
*info_ptr
, bfd
*abfd
)
3831 unsigned int bytes_read
;
3833 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
3834 cu_header
->initial_length_size
= bytes_read
;
3835 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
3836 info_ptr
+= bytes_read
;
3837 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
3839 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
3841 info_ptr
+= bytes_read
;
3842 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
3844 signed_addr
= bfd_get_sign_extend_vma (abfd
);
3845 if (signed_addr
< 0)
3846 internal_error (__FILE__
, __LINE__
,
3847 _("read_comp_unit_head: dwarf from non elf file"));
3848 cu_header
->signed_addr_p
= signed_addr
;
3853 /* Helper function that returns the proper abbrev section for
3856 static struct dwarf2_section_info
*
3857 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
3859 struct dwarf2_section_info
*abbrev
;
3861 if (this_cu
->is_dwz
)
3862 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
3864 abbrev
= &dwarf2_per_objfile
->abbrev
;
3869 /* Subroutine of read_and_check_comp_unit_head and
3870 read_and_check_type_unit_head to simplify them.
3871 Perform various error checking on the header. */
3874 error_check_comp_unit_head (struct comp_unit_head
*header
,
3875 struct dwarf2_section_info
*section
,
3876 struct dwarf2_section_info
*abbrev_section
)
3878 bfd
*abfd
= section
->asection
->owner
;
3879 const char *filename
= bfd_get_filename (abfd
);
3881 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
3882 error (_("Dwarf Error: wrong version in compilation unit header "
3883 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
3886 if (header
->abbrev_offset
.sect_off
3887 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
3888 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
3889 "(offset 0x%lx + 6) [in module %s]"),
3890 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
3893 /* Cast to unsigned long to use 64-bit arithmetic when possible to
3894 avoid potential 32-bit overflow. */
3895 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
3897 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
3898 "(offset 0x%lx + 0) [in module %s]"),
3899 (long) header
->length
, (long) header
->offset
.sect_off
,
3903 /* Read in a CU/TU header and perform some basic error checking.
3904 The contents of the header are stored in HEADER.
3905 The result is a pointer to the start of the first DIE. */
3908 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
3909 struct dwarf2_section_info
*section
,
3910 struct dwarf2_section_info
*abbrev_section
,
3912 int is_debug_types_section
)
3914 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3915 bfd
*abfd
= section
->asection
->owner
;
3917 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3919 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3921 /* If we're reading a type unit, skip over the signature and
3922 type_offset fields. */
3923 if (is_debug_types_section
)
3924 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
3926 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
3928 error_check_comp_unit_head (header
, section
, abbrev_section
);
3933 /* Read in the types comp unit header information from .debug_types entry at
3934 types_ptr. The result is a pointer to one past the end of the header. */
3937 read_and_check_type_unit_head (struct comp_unit_head
*header
,
3938 struct dwarf2_section_info
*section
,
3939 struct dwarf2_section_info
*abbrev_section
,
3941 ULONGEST
*signature
,
3942 cu_offset
*type_offset_in_tu
)
3944 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3945 bfd
*abfd
= section
->asection
->owner
;
3947 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3949 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3951 /* If we're reading a type unit, skip over the signature and
3952 type_offset fields. */
3953 if (signature
!= NULL
)
3954 *signature
= read_8_bytes (abfd
, info_ptr
);
3956 if (type_offset_in_tu
!= NULL
)
3957 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
3958 header
->offset_size
);
3959 info_ptr
+= header
->offset_size
;
3961 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
3963 error_check_comp_unit_head (header
, section
, abbrev_section
);
3968 /* Fetch the abbreviation table offset from a comp or type unit header. */
3971 read_abbrev_offset (struct dwarf2_section_info
*section
,
3974 bfd
*abfd
= section
->asection
->owner
;
3976 unsigned int length
, initial_length_size
, offset_size
;
3977 sect_offset abbrev_offset
;
3979 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
3980 info_ptr
= section
->buffer
+ offset
.sect_off
;
3981 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
3982 offset_size
= initial_length_size
== 4 ? 4 : 8;
3983 info_ptr
+= initial_length_size
+ 2 /*version*/;
3984 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
3985 return abbrev_offset
;
3988 /* Allocate a new partial symtab for file named NAME and mark this new
3989 partial symtab as being an include of PST. */
3992 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
3993 struct objfile
*objfile
)
3995 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
3997 subpst
->section_offsets
= pst
->section_offsets
;
3998 subpst
->textlow
= 0;
3999 subpst
->texthigh
= 0;
4001 subpst
->dependencies
= (struct partial_symtab
**)
4002 obstack_alloc (&objfile
->objfile_obstack
,
4003 sizeof (struct partial_symtab
*));
4004 subpst
->dependencies
[0] = pst
;
4005 subpst
->number_of_dependencies
= 1;
4007 subpst
->globals_offset
= 0;
4008 subpst
->n_global_syms
= 0;
4009 subpst
->statics_offset
= 0;
4010 subpst
->n_static_syms
= 0;
4011 subpst
->symtab
= NULL
;
4012 subpst
->read_symtab
= pst
->read_symtab
;
4015 /* No private part is necessary for include psymtabs. This property
4016 can be used to differentiate between such include psymtabs and
4017 the regular ones. */
4018 subpst
->read_symtab_private
= NULL
;
4021 /* Read the Line Number Program data and extract the list of files
4022 included by the source file represented by PST. Build an include
4023 partial symtab for each of these included files. */
4026 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4027 struct die_info
*die
,
4028 struct partial_symtab
*pst
)
4030 struct line_header
*lh
= NULL
;
4031 struct attribute
*attr
;
4033 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4035 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4037 return; /* No linetable, so no includes. */
4039 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4040 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, 1);
4042 free_line_header (lh
);
4046 hash_signatured_type (const void *item
)
4048 const struct signatured_type
*sig_type
= item
;
4050 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4051 return sig_type
->signature
;
4055 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4057 const struct signatured_type
*lhs
= item_lhs
;
4058 const struct signatured_type
*rhs
= item_rhs
;
4060 return lhs
->signature
== rhs
->signature
;
4063 /* Allocate a hash table for signatured types. */
4066 allocate_signatured_type_table (struct objfile
*objfile
)
4068 return htab_create_alloc_ex (41,
4069 hash_signatured_type
,
4072 &objfile
->objfile_obstack
,
4073 hashtab_obstack_allocate
,
4074 dummy_obstack_deallocate
);
4077 /* A helper function to add a signatured type CU to a table. */
4080 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4082 struct signatured_type
*sigt
= *slot
;
4083 struct signatured_type
***datap
= datum
;
4091 /* Create the hash table of all entries in the .debug_types section.
4092 DWO_FILE is a pointer to the DWO file for .debug_types.dwo,
4094 Note: This function processes DWO files only, not DWP files.
4095 The result is a pointer to the hash table or NULL if there are
4099 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4100 VEC (dwarf2_section_info_def
) *types
)
4102 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4103 htab_t types_htab
= NULL
;
4105 struct dwarf2_section_info
*section
;
4106 struct dwarf2_section_info
*abbrev_section
;
4108 if (VEC_empty (dwarf2_section_info_def
, types
))
4111 abbrev_section
= (dwo_file
!= NULL
4112 ? &dwo_file
->sections
.abbrev
4113 : &dwarf2_per_objfile
->abbrev
);
4115 if (dwarf2_read_debug
)
4116 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4117 dwo_file
? ".dwo" : "",
4118 bfd_get_filename (abbrev_section
->asection
->owner
));
4121 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4125 gdb_byte
*info_ptr
, *end_ptr
;
4126 struct dwarf2_section_info
*abbrev_section
;
4128 dwarf2_read_section (objfile
, section
);
4129 info_ptr
= section
->buffer
;
4131 if (info_ptr
== NULL
)
4134 /* We can't set abfd until now because the section may be empty or
4135 not present, in which case section->asection will be NULL. */
4136 abfd
= section
->asection
->owner
;
4139 abbrev_section
= &dwo_file
->sections
.abbrev
;
4141 abbrev_section
= &dwarf2_per_objfile
->abbrev
;
4143 if (types_htab
== NULL
)
4146 types_htab
= allocate_dwo_unit_table (objfile
);
4148 types_htab
= allocate_signatured_type_table (objfile
);
4151 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4152 because we don't need to read any dies: the signature is in the
4155 end_ptr
= info_ptr
+ section
->size
;
4156 while (info_ptr
< end_ptr
)
4159 cu_offset type_offset_in_tu
;
4161 struct signatured_type
*sig_type
;
4162 struct dwo_unit
*dwo_tu
;
4164 gdb_byte
*ptr
= info_ptr
;
4165 struct comp_unit_head header
;
4166 unsigned int length
;
4168 offset
.sect_off
= ptr
- section
->buffer
;
4170 /* We need to read the type's signature in order to build the hash
4171 table, but we don't need anything else just yet. */
4173 ptr
= read_and_check_type_unit_head (&header
, section
,
4174 abbrev_section
, ptr
,
4175 &signature
, &type_offset_in_tu
);
4177 length
= get_cu_length (&header
);
4179 /* Skip dummy type units. */
4180 if (ptr
>= info_ptr
+ length
4181 || peek_abbrev_code (abfd
, ptr
) == 0)
4190 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4192 dwo_tu
->dwo_file
= dwo_file
;
4193 dwo_tu
->signature
= signature
;
4194 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4195 dwo_tu
->info_or_types_section
= section
;
4196 dwo_tu
->offset
= offset
;
4197 dwo_tu
->length
= length
;
4201 /* N.B.: type_offset is not usable if this type uses a DWO file.
4202 The real type_offset is in the DWO file. */
4204 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4205 struct signatured_type
);
4206 sig_type
->signature
= signature
;
4207 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4208 sig_type
->per_cu
.objfile
= objfile
;
4209 sig_type
->per_cu
.is_debug_types
= 1;
4210 sig_type
->per_cu
.info_or_types_section
= section
;
4211 sig_type
->per_cu
.offset
= offset
;
4212 sig_type
->per_cu
.length
= length
;
4215 slot
= htab_find_slot (types_htab
,
4216 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4218 gdb_assert (slot
!= NULL
);
4221 sect_offset dup_offset
;
4225 const struct dwo_unit
*dup_tu
= *slot
;
4227 dup_offset
= dup_tu
->offset
;
4231 const struct signatured_type
*dup_tu
= *slot
;
4233 dup_offset
= dup_tu
->per_cu
.offset
;
4236 complaint (&symfile_complaints
,
4237 _("debug type entry at offset 0x%x is duplicate to the "
4238 "entry at offset 0x%x, signature 0x%s"),
4239 offset
.sect_off
, dup_offset
.sect_off
,
4240 phex (signature
, sizeof (signature
)));
4242 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4244 if (dwarf2_read_debug
)
4245 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
4247 phex (signature
, sizeof (signature
)));
4256 /* Create the hash table of all entries in the .debug_types section,
4257 and initialize all_type_units.
4258 The result is zero if there is an error (e.g. missing .debug_types section),
4259 otherwise non-zero. */
4262 create_all_type_units (struct objfile
*objfile
)
4265 struct signatured_type
**iter
;
4267 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4268 if (types_htab
== NULL
)
4270 dwarf2_per_objfile
->signatured_types
= NULL
;
4274 dwarf2_per_objfile
->signatured_types
= types_htab
;
4276 dwarf2_per_objfile
->n_type_units
= htab_elements (types_htab
);
4277 dwarf2_per_objfile
->all_type_units
4278 = obstack_alloc (&objfile
->objfile_obstack
,
4279 dwarf2_per_objfile
->n_type_units
4280 * sizeof (struct signatured_type
*));
4281 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4282 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4283 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4284 == dwarf2_per_objfile
->n_type_units
);
4289 /* Lookup a signature based type for DW_FORM_ref_sig8.
4290 Returns NULL if signature SIG is not present in the table. */
4292 static struct signatured_type
*
4293 lookup_signatured_type (ULONGEST sig
)
4295 struct signatured_type find_entry
, *entry
;
4297 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4299 complaint (&symfile_complaints
,
4300 _("missing `.debug_types' section for DW_FORM_ref_sig8 die"));
4304 find_entry
.signature
= sig
;
4305 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
4309 /* Low level DIE reading support. */
4311 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
4314 init_cu_die_reader (struct die_reader_specs
*reader
,
4315 struct dwarf2_cu
*cu
,
4316 struct dwarf2_section_info
*section
,
4317 struct dwo_file
*dwo_file
)
4319 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
4320 reader
->abfd
= section
->asection
->owner
;
4322 reader
->dwo_file
= dwo_file
;
4323 reader
->die_section
= section
;
4324 reader
->buffer
= section
->buffer
;
4325 reader
->buffer_end
= section
->buffer
+ section
->size
;
4328 /* Initialize a CU (or TU) and read its DIEs.
4329 If the CU defers to a DWO file, read the DWO file as well.
4331 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
4332 Otherwise the table specified in the comp unit header is read in and used.
4333 This is an optimization for when we already have the abbrev table.
4335 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
4336 Otherwise, a new CU is allocated with xmalloc.
4338 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
4339 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
4341 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4342 linker) then DIE_READER_FUNC will not get called. */
4345 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
4346 struct abbrev_table
*abbrev_table
,
4347 int use_existing_cu
, int keep
,
4348 die_reader_func_ftype
*die_reader_func
,
4351 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4352 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4353 bfd
*abfd
= section
->asection
->owner
;
4354 struct dwarf2_cu
*cu
;
4355 gdb_byte
*begin_info_ptr
, *info_ptr
;
4356 struct die_reader_specs reader
;
4357 struct die_info
*comp_unit_die
;
4359 struct attribute
*attr
;
4360 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
4361 struct signatured_type
*sig_type
= NULL
;
4362 struct dwarf2_section_info
*abbrev_section
;
4363 /* Non-zero if CU currently points to a DWO file and we need to
4364 reread it. When this happens we need to reread the skeleton die
4365 before we can reread the DWO file. */
4366 int rereading_dwo_cu
= 0;
4368 if (dwarf2_die_debug
)
4369 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4370 this_cu
->is_debug_types
? "type" : "comp",
4371 this_cu
->offset
.sect_off
);
4373 if (use_existing_cu
)
4376 cleanups
= make_cleanup (null_cleanup
, NULL
);
4378 /* This is cheap if the section is already read in. */
4379 dwarf2_read_section (objfile
, section
);
4381 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4383 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
4385 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
4389 /* If this CU is from a DWO file we need to start over, we need to
4390 refetch the attributes from the skeleton CU.
4391 This could be optimized by retrieving those attributes from when we
4392 were here the first time: the previous comp_unit_die was stored in
4393 comp_unit_obstack. But there's no data yet that we need this
4395 if (cu
->dwo_unit
!= NULL
)
4396 rereading_dwo_cu
= 1;
4400 /* If !use_existing_cu, this_cu->cu must be NULL. */
4401 gdb_assert (this_cu
->cu
== NULL
);
4403 cu
= xmalloc (sizeof (*cu
));
4404 init_one_comp_unit (cu
, this_cu
);
4406 /* If an error occurs while loading, release our storage. */
4407 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
4410 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
4412 /* We already have the header, there's no need to read it in again. */
4413 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
4417 if (this_cu
->is_debug_types
)
4420 cu_offset type_offset_in_tu
;
4422 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4423 abbrev_section
, info_ptr
,
4425 &type_offset_in_tu
);
4427 /* Since per_cu is the first member of struct signatured_type,
4428 we can go from a pointer to one to a pointer to the other. */
4429 sig_type
= (struct signatured_type
*) this_cu
;
4430 gdb_assert (sig_type
->signature
== signature
);
4431 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
4432 == type_offset_in_tu
.cu_off
);
4433 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4435 /* LENGTH has not been set yet for type units if we're
4436 using .gdb_index. */
4437 this_cu
->length
= get_cu_length (&cu
->header
);
4439 /* Establish the type offset that can be used to lookup the type. */
4440 sig_type
->type_offset_in_section
.sect_off
=
4441 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
4445 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4449 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4450 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
4454 /* Skip dummy compilation units. */
4455 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4456 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4458 do_cleanups (cleanups
);
4462 /* If we don't have them yet, read the abbrevs for this compilation unit.
4463 And if we need to read them now, make sure they're freed when we're
4464 done. Note that it's important that if the CU had an abbrev table
4465 on entry we don't free it when we're done: Somewhere up the call stack
4466 it may be in use. */
4467 if (abbrev_table
!= NULL
)
4469 gdb_assert (cu
->abbrev_table
== NULL
);
4470 gdb_assert (cu
->header
.abbrev_offset
.sect_off
4471 == abbrev_table
->offset
.sect_off
);
4472 cu
->abbrev_table
= abbrev_table
;
4474 else if (cu
->abbrev_table
== NULL
)
4476 dwarf2_read_abbrevs (cu
, abbrev_section
);
4477 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4479 else if (rereading_dwo_cu
)
4481 dwarf2_free_abbrev_table (cu
);
4482 dwarf2_read_abbrevs (cu
, abbrev_section
);
4485 /* Read the top level CU/TU die. */
4486 init_cu_die_reader (&reader
, cu
, section
, NULL
);
4487 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4489 /* If we have a DWO stub, process it and then read in the DWO file.
4490 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains
4491 a DWO CU, that this test will fail. */
4492 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
4495 char *dwo_name
= DW_STRING (attr
);
4496 const char *comp_dir_string
;
4497 struct dwo_unit
*dwo_unit
;
4498 ULONGEST signature
; /* Or dwo_id. */
4499 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
4500 int i
,num_extra_attrs
;
4501 struct dwarf2_section_info
*dwo_abbrev_section
;
4504 error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name"
4505 " has children (offset 0x%x) [in module %s]"),
4506 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
4508 /* These attributes aren't processed until later:
4509 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
4510 However, the attribute is found in the stub which we won't have later.
4511 In order to not impose this complication on the rest of the code,
4512 we read them here and copy them to the DWO CU/TU die. */
4514 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
4517 if (! this_cu
->is_debug_types
)
4518 stmt_list
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
4519 low_pc
= dwarf2_attr (comp_unit_die
, DW_AT_low_pc
, cu
);
4520 high_pc
= dwarf2_attr (comp_unit_die
, DW_AT_high_pc
, cu
);
4521 ranges
= dwarf2_attr (comp_unit_die
, DW_AT_ranges
, cu
);
4522 comp_dir
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4524 /* There should be a DW_AT_addr_base attribute here (if needed).
4525 We need the value before we can process DW_FORM_GNU_addr_index. */
4527 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
4529 cu
->addr_base
= DW_UNSND (attr
);
4531 /* There should be a DW_AT_ranges_base attribute here (if needed).
4532 We need the value before we can process DW_AT_ranges. */
4533 cu
->ranges_base
= 0;
4534 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
4536 cu
->ranges_base
= DW_UNSND (attr
);
4538 if (this_cu
->is_debug_types
)
4540 gdb_assert (sig_type
!= NULL
);
4541 signature
= sig_type
->signature
;
4545 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
4547 error (_("Dwarf Error: missing dwo_id [in module %s]"),
4549 signature
= DW_UNSND (attr
);
4552 /* We may need the comp_dir in order to find the DWO file. */
4553 comp_dir_string
= NULL
;
4555 comp_dir_string
= DW_STRING (comp_dir
);
4557 if (this_cu
->is_debug_types
)
4558 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir_string
);
4560 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir_string
,
4563 if (dwo_unit
== NULL
)
4565 error (_("Dwarf Error: CU at offset 0x%x references unknown DWO"
4566 " with ID %s [in module %s]"),
4567 this_cu
->offset
.sect_off
,
4568 phex (signature
, sizeof (signature
)),
4572 /* Set up for reading the DWO CU/TU. */
4573 cu
->dwo_unit
= dwo_unit
;
4574 section
= dwo_unit
->info_or_types_section
;
4575 dwarf2_read_section (objfile
, section
);
4576 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
4577 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
4578 init_cu_die_reader (&reader
, cu
, section
, dwo_unit
->dwo_file
);
4580 if (this_cu
->is_debug_types
)
4583 cu_offset type_offset_in_tu
;
4585 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4589 &type_offset_in_tu
);
4590 gdb_assert (sig_type
->signature
== signature
);
4591 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4592 /* For DWOs coming from DWP files, we don't know the CU length
4593 nor the type's offset in the TU until now. */
4594 dwo_unit
->length
= get_cu_length (&cu
->header
);
4595 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
4597 /* Establish the type offset that can be used to lookup the type.
4598 For DWO files, we don't know it until now. */
4599 sig_type
->type_offset_in_section
.sect_off
=
4600 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
4604 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4607 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4608 /* For DWOs coming from DWP files, we don't know the CU length
4610 dwo_unit
->length
= get_cu_length (&cu
->header
);
4613 /* Discard the original CU's abbrev table, and read the DWO's. */
4614 if (abbrev_table
== NULL
)
4616 dwarf2_free_abbrev_table (cu
);
4617 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4621 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4622 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4625 /* Read in the die, but leave space to copy over the attributes
4626 from the stub. This has the benefit of simplifying the rest of
4627 the code - all the real work is done here. */
4628 num_extra_attrs
= ((stmt_list
!= NULL
)
4632 + (comp_dir
!= NULL
));
4633 info_ptr
= read_full_die_1 (&reader
, &comp_unit_die
, info_ptr
,
4634 &has_children
, num_extra_attrs
);
4636 /* Copy over the attributes from the stub to the DWO die. */
4637 i
= comp_unit_die
->num_attrs
;
4638 if (stmt_list
!= NULL
)
4639 comp_unit_die
->attrs
[i
++] = *stmt_list
;
4641 comp_unit_die
->attrs
[i
++] = *low_pc
;
4642 if (high_pc
!= NULL
)
4643 comp_unit_die
->attrs
[i
++] = *high_pc
;
4645 comp_unit_die
->attrs
[i
++] = *ranges
;
4646 if (comp_dir
!= NULL
)
4647 comp_unit_die
->attrs
[i
++] = *comp_dir
;
4648 comp_unit_die
->num_attrs
+= num_extra_attrs
;
4650 /* Skip dummy compilation units. */
4651 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
4652 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4654 do_cleanups (cleanups
);
4659 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4661 if (free_cu_cleanup
!= NULL
)
4665 /* We've successfully allocated this compilation unit. Let our
4666 caller clean it up when finished with it. */
4667 discard_cleanups (free_cu_cleanup
);
4669 /* We can only discard free_cu_cleanup and all subsequent cleanups.
4670 So we have to manually free the abbrev table. */
4671 dwarf2_free_abbrev_table (cu
);
4673 /* Link this CU into read_in_chain. */
4674 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4675 dwarf2_per_objfile
->read_in_chain
= this_cu
;
4678 do_cleanups (free_cu_cleanup
);
4681 do_cleanups (cleanups
);
4684 /* Read CU/TU THIS_CU in section SECTION,
4685 but do not follow DW_AT_GNU_dwo_name if present.
4686 DWOP_FILE, if non-NULL, is the DWO/DWP file to read (the caller is assumed
4687 to have already done the lookup to find the DWO/DWP file).
4689 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
4690 THIS_CU->is_debug_types, but nothing else.
4692 We fill in THIS_CU->length.
4694 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4695 linker) then DIE_READER_FUNC will not get called.
4697 THIS_CU->cu is always freed when done.
4698 This is done in order to not leave THIS_CU->cu in a state where we have
4699 to care whether it refers to the "main" CU or the DWO CU. */
4702 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
4703 struct dwarf2_section_info
*abbrev_section
,
4704 struct dwo_file
*dwo_file
,
4705 die_reader_func_ftype
*die_reader_func
,
4708 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4709 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4710 bfd
*abfd
= section
->asection
->owner
;
4711 struct dwarf2_cu cu
;
4712 gdb_byte
*begin_info_ptr
, *info_ptr
;
4713 struct die_reader_specs reader
;
4714 struct cleanup
*cleanups
;
4715 struct die_info
*comp_unit_die
;
4718 if (dwarf2_die_debug
)
4719 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4720 this_cu
->is_debug_types
? "type" : "comp",
4721 this_cu
->offset
.sect_off
);
4723 gdb_assert (this_cu
->cu
== NULL
);
4725 /* This is cheap if the section is already read in. */
4726 dwarf2_read_section (objfile
, section
);
4728 init_one_comp_unit (&cu
, this_cu
);
4730 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
4732 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4733 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
4734 abbrev_section
, info_ptr
,
4735 this_cu
->is_debug_types
);
4737 this_cu
->length
= get_cu_length (&cu
.header
);
4739 /* Skip dummy compilation units. */
4740 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4741 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4743 do_cleanups (cleanups
);
4747 dwarf2_read_abbrevs (&cu
, abbrev_section
);
4748 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
4750 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
4751 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4753 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4755 do_cleanups (cleanups
);
4758 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
4759 does not lookup the specified DWO file.
4760 This cannot be used to read DWO files.
4762 THIS_CU->cu is always freed when done.
4763 This is done in order to not leave THIS_CU->cu in a state where we have
4764 to care whether it refers to the "main" CU or the DWO CU.
4765 We can revisit this if the data shows there's a performance issue. */
4768 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
4769 die_reader_func_ftype
*die_reader_func
,
4772 init_cutu_and_read_dies_no_follow (this_cu
,
4773 get_abbrev_section_for_cu (this_cu
),
4775 die_reader_func
, data
);
4778 /* Create a psymtab named NAME and assign it to PER_CU.
4780 The caller must fill in the following details:
4781 dirname, textlow, texthigh. */
4783 static struct partial_symtab
*
4784 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
4786 struct objfile
*objfile
= per_cu
->objfile
;
4787 struct partial_symtab
*pst
;
4789 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
4791 objfile
->global_psymbols
.next
,
4792 objfile
->static_psymbols
.next
);
4794 pst
->psymtabs_addrmap_supported
= 1;
4796 /* This is the glue that links PST into GDB's symbol API. */
4797 pst
->read_symtab_private
= per_cu
;
4798 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
4799 per_cu
->v
.psymtab
= pst
;
4804 /* die_reader_func for process_psymtab_comp_unit. */
4807 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
4809 struct die_info
*comp_unit_die
,
4813 struct dwarf2_cu
*cu
= reader
->cu
;
4814 struct objfile
*objfile
= cu
->objfile
;
4815 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
4816 struct attribute
*attr
;
4818 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
4819 struct partial_symtab
*pst
;
4821 const char *filename
;
4822 int *want_partial_unit_ptr
= data
;
4824 if (comp_unit_die
->tag
== DW_TAG_partial_unit
4825 && (want_partial_unit_ptr
== NULL
4826 || !*want_partial_unit_ptr
))
4829 gdb_assert (! per_cu
->is_debug_types
);
4831 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
4833 cu
->list_in_scope
= &file_symbols
;
4835 /* Allocate a new partial symbol table structure. */
4836 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
4837 if (attr
== NULL
|| !DW_STRING (attr
))
4840 filename
= DW_STRING (attr
);
4842 pst
= create_partial_symtab (per_cu
, filename
);
4844 /* This must be done before calling dwarf2_build_include_psymtabs. */
4845 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4847 pst
->dirname
= DW_STRING (attr
);
4849 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4851 dwarf2_find_base_address (comp_unit_die
, cu
);
4853 /* Possibly set the default values of LOWPC and HIGHPC from
4855 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
4856 &best_highpc
, cu
, pst
);
4857 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
4858 /* Store the contiguous range if it is not empty; it can be empty for
4859 CUs with no code. */
4860 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4861 best_lowpc
+ baseaddr
,
4862 best_highpc
+ baseaddr
- 1, pst
);
4864 /* Check if comp unit has_children.
4865 If so, read the rest of the partial symbols from this comp unit.
4866 If not, there's no more debug_info for this comp unit. */
4869 struct partial_die_info
*first_die
;
4870 CORE_ADDR lowpc
, highpc
;
4872 lowpc
= ((CORE_ADDR
) -1);
4873 highpc
= ((CORE_ADDR
) 0);
4875 first_die
= load_partial_dies (reader
, info_ptr
, 1);
4877 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
4880 /* If we didn't find a lowpc, set it to highpc to avoid
4881 complaints from `maint check'. */
4882 if (lowpc
== ((CORE_ADDR
) -1))
4885 /* If the compilation unit didn't have an explicit address range,
4886 then use the information extracted from its child dies. */
4890 best_highpc
= highpc
;
4893 pst
->textlow
= best_lowpc
+ baseaddr
;
4894 pst
->texthigh
= best_highpc
+ baseaddr
;
4896 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
4897 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
4898 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
4899 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
4900 sort_pst_symbols (objfile
, pst
);
4902 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
))
4905 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
);
4906 struct dwarf2_per_cu_data
*iter
;
4908 /* Fill in 'dependencies' here; we fill in 'users' in a
4910 pst
->number_of_dependencies
= len
;
4911 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
4912 len
* sizeof (struct symtab
*));
4914 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
,
4917 pst
->dependencies
[i
] = iter
->v
.psymtab
;
4919 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
);
4922 /* Get the list of files included in the current compilation unit,
4923 and build a psymtab for each of them. */
4924 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
4926 if (dwarf2_read_debug
)
4928 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4930 fprintf_unfiltered (gdb_stdlog
,
4931 "Psymtab for %s unit @0x%x: %s - %s"
4932 ", %d global, %d static syms\n",
4933 per_cu
->is_debug_types
? "type" : "comp",
4934 per_cu
->offset
.sect_off
,
4935 paddress (gdbarch
, pst
->textlow
),
4936 paddress (gdbarch
, pst
->texthigh
),
4937 pst
->n_global_syms
, pst
->n_static_syms
);
4941 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
4942 Process compilation unit THIS_CU for a psymtab. */
4945 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
4946 int want_partial_unit
)
4948 /* If this compilation unit was already read in, free the
4949 cached copy in order to read it in again. This is
4950 necessary because we skipped some symbols when we first
4951 read in the compilation unit (see load_partial_dies).
4952 This problem could be avoided, but the benefit is unclear. */
4953 if (this_cu
->cu
!= NULL
)
4954 free_one_cached_comp_unit (this_cu
);
4956 gdb_assert (! this_cu
->is_debug_types
);
4957 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
4958 process_psymtab_comp_unit_reader
,
4959 &want_partial_unit
);
4961 /* Age out any secondary CUs. */
4962 age_cached_comp_units ();
4966 hash_type_unit_group (const void *item
)
4968 const struct type_unit_group
*tu_group
= item
;
4970 return hash_stmt_list_entry (&tu_group
->hash
);
4974 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
4976 const struct type_unit_group
*lhs
= item_lhs
;
4977 const struct type_unit_group
*rhs
= item_rhs
;
4979 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
4982 /* Allocate a hash table for type unit groups. */
4985 allocate_type_unit_groups_table (void)
4987 return htab_create_alloc_ex (3,
4988 hash_type_unit_group
,
4991 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
4992 hashtab_obstack_allocate
,
4993 dummy_obstack_deallocate
);
4996 /* Type units that don't have DW_AT_stmt_list are grouped into their own
4997 partial symtabs. We combine several TUs per psymtab to not let the size
4998 of any one psymtab grow too big. */
4999 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5000 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5002 /* Helper routine for get_type_unit_group.
5003 Create the type_unit_group object used to hold one or more TUs. */
5005 static struct type_unit_group
*
5006 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5008 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5009 struct dwarf2_per_cu_data
*per_cu
;
5010 struct type_unit_group
*tu_group
;
5012 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5013 struct type_unit_group
);
5014 per_cu
= &tu_group
->per_cu
;
5015 per_cu
->objfile
= objfile
;
5016 per_cu
->is_debug_types
= 1;
5017 per_cu
->s
.type_unit_group
= tu_group
;
5019 if (dwarf2_per_objfile
->using_index
)
5021 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5022 struct dwarf2_per_cu_quick_data
);
5023 tu_group
->t
.first_tu
= cu
->per_cu
;
5027 unsigned int line_offset
= line_offset_struct
.sect_off
;
5028 struct partial_symtab
*pst
;
5031 /* Give the symtab a useful name for debug purposes. */
5032 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5033 name
= xstrprintf ("<type_units_%d>",
5034 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5036 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5038 pst
= create_partial_symtab (per_cu
, name
);
5044 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5045 tu_group
->hash
.line_offset
= line_offset_struct
;
5050 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5051 STMT_LIST is a DW_AT_stmt_list attribute. */
5053 static struct type_unit_group
*
5054 get_type_unit_group (struct dwarf2_cu
*cu
, struct attribute
*stmt_list
)
5056 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5057 struct type_unit_group
*tu_group
;
5059 unsigned int line_offset
;
5060 struct type_unit_group type_unit_group_for_lookup
;
5062 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5064 dwarf2_per_objfile
->type_unit_groups
=
5065 allocate_type_unit_groups_table ();
5068 /* Do we need to create a new group, or can we use an existing one? */
5072 line_offset
= DW_UNSND (stmt_list
);
5073 ++tu_stats
->nr_symtab_sharers
;
5077 /* Ugh, no stmt_list. Rare, but we have to handle it.
5078 We can do various things here like create one group per TU or
5079 spread them over multiple groups to split up the expansion work.
5080 To avoid worst case scenarios (too many groups or too large groups)
5081 we, umm, group them in bunches. */
5082 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5083 | (tu_stats
->nr_stmt_less_type_units
5084 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5085 ++tu_stats
->nr_stmt_less_type_units
;
5088 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5089 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5090 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5091 &type_unit_group_for_lookup
, INSERT
);
5095 gdb_assert (tu_group
!= NULL
);
5099 sect_offset line_offset_struct
;
5101 line_offset_struct
.sect_off
= line_offset
;
5102 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5104 ++tu_stats
->nr_symtabs
;
5110 /* Struct used to sort TUs by their abbreviation table offset. */
5112 struct tu_abbrev_offset
5114 struct signatured_type
*sig_type
;
5115 sect_offset abbrev_offset
;
5118 /* Helper routine for build_type_unit_groups, passed to qsort. */
5121 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
5123 const struct tu_abbrev_offset
* const *a
= ap
;
5124 const struct tu_abbrev_offset
* const *b
= bp
;
5125 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
5126 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
5128 return (aoff
> boff
) - (aoff
< boff
);
5131 /* A helper function to add a type_unit_group to a table. */
5134 add_type_unit_group_to_table (void **slot
, void *datum
)
5136 struct type_unit_group
*tu_group
= *slot
;
5137 struct type_unit_group
***datap
= datum
;
5145 /* Efficiently read all the type units, calling init_cutu_and_read_dies on
5146 each one passing FUNC,DATA.
5148 The efficiency is because we sort TUs by the abbrev table they use and
5149 only read each abbrev table once. In one program there are 200K TUs
5150 sharing 8K abbrev tables.
5152 The main purpose of this function is to support building the
5153 dwarf2_per_objfile->type_unit_groups table.
5154 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
5155 can collapse the search space by grouping them by stmt_list.
5156 The savings can be significant, in the same program from above the 200K TUs
5157 share 8K stmt_list tables.
5159 FUNC is expected to call get_type_unit_group, which will create the
5160 struct type_unit_group if necessary and add it to
5161 dwarf2_per_objfile->type_unit_groups. */
5164 build_type_unit_groups (die_reader_func_ftype
*func
, void *data
)
5166 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5167 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5168 struct cleanup
*cleanups
;
5169 struct abbrev_table
*abbrev_table
;
5170 sect_offset abbrev_offset
;
5171 struct tu_abbrev_offset
*sorted_by_abbrev
;
5172 struct type_unit_group
**iter
;
5175 /* It's up to the caller to not call us multiple times. */
5176 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
5178 if (dwarf2_per_objfile
->n_type_units
== 0)
5181 /* TUs typically share abbrev tables, and there can be way more TUs than
5182 abbrev tables. Sort by abbrev table to reduce the number of times we
5183 read each abbrev table in.
5184 Alternatives are to punt or to maintain a cache of abbrev tables.
5185 This is simpler and efficient enough for now.
5187 Later we group TUs by their DW_AT_stmt_list value (as this defines the
5188 symtab to use). Typically TUs with the same abbrev offset have the same
5189 stmt_list value too so in practice this should work well.
5191 The basic algorithm here is:
5193 sort TUs by abbrev table
5194 for each TU with same abbrev table:
5195 read abbrev table if first user
5196 read TU top level DIE
5197 [IWBN if DWO skeletons had DW_AT_stmt_list]
5200 if (dwarf2_read_debug
)
5201 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
5203 /* Sort in a separate table to maintain the order of all_type_units
5204 for .gdb_index: TU indices directly index all_type_units. */
5205 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
5206 dwarf2_per_objfile
->n_type_units
);
5207 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
5209 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
5211 sorted_by_abbrev
[i
].sig_type
= sig_type
;
5212 sorted_by_abbrev
[i
].abbrev_offset
=
5213 read_abbrev_offset (sig_type
->per_cu
.info_or_types_section
,
5214 sig_type
->per_cu
.offset
);
5216 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
5217 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
5218 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
5220 /* Note: In the .gdb_index case, get_type_unit_group may have already been
5221 called any number of times, so we don't reset tu_stats here. */
5223 abbrev_offset
.sect_off
= ~(unsigned) 0;
5224 abbrev_table
= NULL
;
5225 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
5227 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
5229 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
5231 /* Switch to the next abbrev table if necessary. */
5232 if (abbrev_table
== NULL
5233 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
5235 if (abbrev_table
!= NULL
)
5237 abbrev_table_free (abbrev_table
);
5238 /* Reset to NULL in case abbrev_table_read_table throws
5239 an error: abbrev_table_free_cleanup will get called. */
5240 abbrev_table
= NULL
;
5242 abbrev_offset
= tu
->abbrev_offset
;
5244 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
5246 ++tu_stats
->nr_uniq_abbrev_tables
;
5249 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
5253 /* Create a vector of pointers to primary type units to make it easy to
5254 iterate over them and CUs. See dw2_get_primary_cu. */
5255 dwarf2_per_objfile
->n_type_unit_groups
=
5256 htab_elements (dwarf2_per_objfile
->type_unit_groups
);
5257 dwarf2_per_objfile
->all_type_unit_groups
=
5258 obstack_alloc (&objfile
->objfile_obstack
,
5259 dwarf2_per_objfile
->n_type_unit_groups
5260 * sizeof (struct type_unit_group
*));
5261 iter
= &dwarf2_per_objfile
->all_type_unit_groups
[0];
5262 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
5263 add_type_unit_group_to_table
, &iter
);
5264 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_unit_groups
[0]
5265 == dwarf2_per_objfile
->n_type_unit_groups
);
5267 do_cleanups (cleanups
);
5269 if (dwarf2_read_debug
)
5271 fprintf_unfiltered (gdb_stdlog
, "Done building type unit groups:\n");
5272 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
5273 dwarf2_per_objfile
->n_type_units
);
5274 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
5275 tu_stats
->nr_uniq_abbrev_tables
);
5276 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
5277 tu_stats
->nr_symtabs
);
5278 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
5279 tu_stats
->nr_symtab_sharers
);
5280 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
5281 tu_stats
->nr_stmt_less_type_units
);
5285 /* Reader function for build_type_psymtabs. */
5288 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
5290 struct die_info
*type_unit_die
,
5294 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5295 struct dwarf2_cu
*cu
= reader
->cu
;
5296 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5297 struct type_unit_group
*tu_group
;
5298 struct attribute
*attr
;
5299 struct partial_die_info
*first_die
;
5300 CORE_ADDR lowpc
, highpc
;
5301 struct partial_symtab
*pst
;
5303 gdb_assert (data
== NULL
);
5308 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
5309 tu_group
= get_type_unit_group (cu
, attr
);
5311 VEC_safe_push (dwarf2_per_cu_ptr
, tu_group
->t
.tus
, per_cu
);
5313 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
5314 cu
->list_in_scope
= &file_symbols
;
5315 pst
= create_partial_symtab (per_cu
, "");
5318 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5320 lowpc
= (CORE_ADDR
) -1;
5321 highpc
= (CORE_ADDR
) 0;
5322 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
5324 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
5325 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
5326 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
5327 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
5328 sort_pst_symbols (objfile
, pst
);
5331 /* Traversal function for build_type_psymtabs. */
5334 build_type_psymtab_dependencies (void **slot
, void *info
)
5336 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5337 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
5338 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
5339 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5340 int len
= VEC_length (dwarf2_per_cu_ptr
, tu_group
->t
.tus
);
5341 struct dwarf2_per_cu_data
*iter
;
5344 gdb_assert (len
> 0);
5346 pst
->number_of_dependencies
= len
;
5347 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
5348 len
* sizeof (struct psymtab
*));
5350 VEC_iterate (dwarf2_per_cu_ptr
, tu_group
->t
.tus
, i
, iter
);
5353 pst
->dependencies
[i
] = iter
->v
.psymtab
;
5354 iter
->s
.type_unit_group
= tu_group
;
5357 VEC_free (dwarf2_per_cu_ptr
, tu_group
->t
.tus
);
5362 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5363 Build partial symbol tables for the .debug_types comp-units. */
5366 build_type_psymtabs (struct objfile
*objfile
)
5368 if (! create_all_type_units (objfile
))
5371 build_type_unit_groups (build_type_psymtabs_reader
, NULL
);
5373 /* Now that all TUs have been processed we can fill in the dependencies. */
5374 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
5375 build_type_psymtab_dependencies
, NULL
);
5378 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
5381 psymtabs_addrmap_cleanup (void *o
)
5383 struct objfile
*objfile
= o
;
5385 objfile
->psymtabs_addrmap
= NULL
;
5388 /* Compute the 'user' field for each psymtab in OBJFILE. */
5391 set_partial_user (struct objfile
*objfile
)
5395 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5397 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5398 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5404 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
5406 /* Set the 'user' field only if it is not already set. */
5407 if (pst
->dependencies
[j
]->user
== NULL
)
5408 pst
->dependencies
[j
]->user
= pst
;
5413 /* Build the partial symbol table by doing a quick pass through the
5414 .debug_info and .debug_abbrev sections. */
5417 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
5419 struct cleanup
*back_to
, *addrmap_cleanup
;
5420 struct obstack temp_obstack
;
5423 if (dwarf2_read_debug
)
5425 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
5429 dwarf2_per_objfile
->reading_partial_symbols
= 1;
5431 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
5433 /* Any cached compilation units will be linked by the per-objfile
5434 read_in_chain. Make sure to free them when we're done. */
5435 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
5437 build_type_psymtabs (objfile
);
5439 create_all_comp_units (objfile
);
5441 /* Create a temporary address map on a temporary obstack. We later
5442 copy this to the final obstack. */
5443 obstack_init (&temp_obstack
);
5444 make_cleanup_obstack_free (&temp_obstack
);
5445 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
5446 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
5448 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5450 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5452 process_psymtab_comp_unit (per_cu
, 0);
5455 set_partial_user (objfile
);
5457 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
5458 &objfile
->objfile_obstack
);
5459 discard_cleanups (addrmap_cleanup
);
5461 do_cleanups (back_to
);
5463 if (dwarf2_read_debug
)
5464 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
5468 /* die_reader_func for load_partial_comp_unit. */
5471 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
5473 struct die_info
*comp_unit_die
,
5477 struct dwarf2_cu
*cu
= reader
->cu
;
5479 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
5481 /* Check if comp unit has_children.
5482 If so, read the rest of the partial symbols from this comp unit.
5483 If not, there's no more debug_info for this comp unit. */
5485 load_partial_dies (reader
, info_ptr
, 0);
5488 /* Load the partial DIEs for a secondary CU into memory.
5489 This is also used when rereading a primary CU with load_all_dies. */
5492 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
5494 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
5495 load_partial_comp_unit_reader
, NULL
);
5499 read_comp_units_from_section (struct objfile
*objfile
,
5500 struct dwarf2_section_info
*section
,
5501 unsigned int is_dwz
,
5504 struct dwarf2_per_cu_data
***all_comp_units
)
5507 bfd
*abfd
= section
->asection
->owner
;
5509 dwarf2_read_section (objfile
, section
);
5511 info_ptr
= section
->buffer
;
5513 while (info_ptr
< section
->buffer
+ section
->size
)
5515 unsigned int length
, initial_length_size
;
5516 struct dwarf2_per_cu_data
*this_cu
;
5519 offset
.sect_off
= info_ptr
- section
->buffer
;
5521 /* Read just enough information to find out where the next
5522 compilation unit is. */
5523 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
5525 /* Save the compilation unit for later lookup. */
5526 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
5527 sizeof (struct dwarf2_per_cu_data
));
5528 memset (this_cu
, 0, sizeof (*this_cu
));
5529 this_cu
->offset
= offset
;
5530 this_cu
->length
= length
+ initial_length_size
;
5531 this_cu
->is_dwz
= is_dwz
;
5532 this_cu
->objfile
= objfile
;
5533 this_cu
->info_or_types_section
= section
;
5535 if (*n_comp_units
== *n_allocated
)
5538 *all_comp_units
= xrealloc (*all_comp_units
,
5540 * sizeof (struct dwarf2_per_cu_data
*));
5542 (*all_comp_units
)[*n_comp_units
] = this_cu
;
5545 info_ptr
= info_ptr
+ this_cu
->length
;
5549 /* Create a list of all compilation units in OBJFILE.
5550 This is only done for -readnow and building partial symtabs. */
5553 create_all_comp_units (struct objfile
*objfile
)
5557 struct dwarf2_per_cu_data
**all_comp_units
;
5561 all_comp_units
= xmalloc (n_allocated
5562 * sizeof (struct dwarf2_per_cu_data
*));
5564 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
5565 &n_allocated
, &n_comp_units
, &all_comp_units
);
5567 if (bfd_get_section_by_name (objfile
->obfd
, ".gnu_debugaltlink") != NULL
)
5569 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
5571 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
5572 &n_allocated
, &n_comp_units
,
5576 dwarf2_per_objfile
->all_comp_units
5577 = obstack_alloc (&objfile
->objfile_obstack
,
5578 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
5579 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
5580 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
5581 xfree (all_comp_units
);
5582 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
5585 /* Process all loaded DIEs for compilation unit CU, starting at
5586 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
5587 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
5588 DW_AT_ranges). If NEED_PC is set, then this function will set
5589 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
5590 and record the covered ranges in the addrmap. */
5593 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
5594 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
5596 struct partial_die_info
*pdi
;
5598 /* Now, march along the PDI's, descending into ones which have
5599 interesting children but skipping the children of the other ones,
5600 until we reach the end of the compilation unit. */
5606 fixup_partial_die (pdi
, cu
);
5608 /* Anonymous namespaces or modules have no name but have interesting
5609 children, so we need to look at them. Ditto for anonymous
5612 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
5613 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
5614 || pdi
->tag
== DW_TAG_imported_unit
)
5618 case DW_TAG_subprogram
:
5619 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
5621 case DW_TAG_constant
:
5622 case DW_TAG_variable
:
5623 case DW_TAG_typedef
:
5624 case DW_TAG_union_type
:
5625 if (!pdi
->is_declaration
)
5627 add_partial_symbol (pdi
, cu
);
5630 case DW_TAG_class_type
:
5631 case DW_TAG_interface_type
:
5632 case DW_TAG_structure_type
:
5633 if (!pdi
->is_declaration
)
5635 add_partial_symbol (pdi
, cu
);
5638 case DW_TAG_enumeration_type
:
5639 if (!pdi
->is_declaration
)
5640 add_partial_enumeration (pdi
, cu
);
5642 case DW_TAG_base_type
:
5643 case DW_TAG_subrange_type
:
5644 /* File scope base type definitions are added to the partial
5646 add_partial_symbol (pdi
, cu
);
5648 case DW_TAG_namespace
:
5649 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
5652 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
5654 case DW_TAG_imported_unit
:
5656 struct dwarf2_per_cu_data
*per_cu
;
5658 /* For now we don't handle imported units in type units. */
5659 if (cu
->per_cu
->is_debug_types
)
5661 error (_("Dwarf Error: DW_TAG_imported_unit is not"
5662 " supported in type units [in module %s]"),
5666 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
5670 /* Go read the partial unit, if needed. */
5671 if (per_cu
->v
.psymtab
== NULL
)
5672 process_psymtab_comp_unit (per_cu
, 1);
5674 VEC_safe_push (dwarf2_per_cu_ptr
,
5675 cu
->per_cu
->s
.imported_symtabs
, per_cu
);
5683 /* If the die has a sibling, skip to the sibling. */
5685 pdi
= pdi
->die_sibling
;
5689 /* Functions used to compute the fully scoped name of a partial DIE.
5691 Normally, this is simple. For C++, the parent DIE's fully scoped
5692 name is concatenated with "::" and the partial DIE's name. For
5693 Java, the same thing occurs except that "." is used instead of "::".
5694 Enumerators are an exception; they use the scope of their parent
5695 enumeration type, i.e. the name of the enumeration type is not
5696 prepended to the enumerator.
5698 There are two complexities. One is DW_AT_specification; in this
5699 case "parent" means the parent of the target of the specification,
5700 instead of the direct parent of the DIE. The other is compilers
5701 which do not emit DW_TAG_namespace; in this case we try to guess
5702 the fully qualified name of structure types from their members'
5703 linkage names. This must be done using the DIE's children rather
5704 than the children of any DW_AT_specification target. We only need
5705 to do this for structures at the top level, i.e. if the target of
5706 any DW_AT_specification (if any; otherwise the DIE itself) does not
5709 /* Compute the scope prefix associated with PDI's parent, in
5710 compilation unit CU. The result will be allocated on CU's
5711 comp_unit_obstack, or a copy of the already allocated PDI->NAME
5712 field. NULL is returned if no prefix is necessary. */
5714 partial_die_parent_scope (struct partial_die_info
*pdi
,
5715 struct dwarf2_cu
*cu
)
5717 char *grandparent_scope
;
5718 struct partial_die_info
*parent
, *real_pdi
;
5720 /* We need to look at our parent DIE; if we have a DW_AT_specification,
5721 then this means the parent of the specification DIE. */
5724 while (real_pdi
->has_specification
)
5725 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
5726 real_pdi
->spec_is_dwz
, cu
);
5728 parent
= real_pdi
->die_parent
;
5732 if (parent
->scope_set
)
5733 return parent
->scope
;
5735 fixup_partial_die (parent
, cu
);
5737 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
5739 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
5740 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
5741 Work around this problem here. */
5742 if (cu
->language
== language_cplus
5743 && parent
->tag
== DW_TAG_namespace
5744 && strcmp (parent
->name
, "::") == 0
5745 && grandparent_scope
== NULL
)
5747 parent
->scope
= NULL
;
5748 parent
->scope_set
= 1;
5752 if (pdi
->tag
== DW_TAG_enumerator
)
5753 /* Enumerators should not get the name of the enumeration as a prefix. */
5754 parent
->scope
= grandparent_scope
;
5755 else if (parent
->tag
== DW_TAG_namespace
5756 || parent
->tag
== DW_TAG_module
5757 || parent
->tag
== DW_TAG_structure_type
5758 || parent
->tag
== DW_TAG_class_type
5759 || parent
->tag
== DW_TAG_interface_type
5760 || parent
->tag
== DW_TAG_union_type
5761 || parent
->tag
== DW_TAG_enumeration_type
)
5763 if (grandparent_scope
== NULL
)
5764 parent
->scope
= parent
->name
;
5766 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
5768 parent
->name
, 0, cu
);
5772 /* FIXME drow/2004-04-01: What should we be doing with
5773 function-local names? For partial symbols, we should probably be
5775 complaint (&symfile_complaints
,
5776 _("unhandled containing DIE tag %d for DIE at %d"),
5777 parent
->tag
, pdi
->offset
.sect_off
);
5778 parent
->scope
= grandparent_scope
;
5781 parent
->scope_set
= 1;
5782 return parent
->scope
;
5785 /* Return the fully scoped name associated with PDI, from compilation unit
5786 CU. The result will be allocated with malloc. */
5789 partial_die_full_name (struct partial_die_info
*pdi
,
5790 struct dwarf2_cu
*cu
)
5794 /* If this is a template instantiation, we can not work out the
5795 template arguments from partial DIEs. So, unfortunately, we have
5796 to go through the full DIEs. At least any work we do building
5797 types here will be reused if full symbols are loaded later. */
5798 if (pdi
->has_template_arguments
)
5800 fixup_partial_die (pdi
, cu
);
5802 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
5804 struct die_info
*die
;
5805 struct attribute attr
;
5806 struct dwarf2_cu
*ref_cu
= cu
;
5808 /* DW_FORM_ref_addr is using section offset. */
5810 attr
.form
= DW_FORM_ref_addr
;
5811 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
5812 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
5814 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
5818 parent_scope
= partial_die_parent_scope (pdi
, cu
);
5819 if (parent_scope
== NULL
)
5822 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
5826 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
5828 struct objfile
*objfile
= cu
->objfile
;
5830 char *actual_name
= NULL
;
5832 int built_actual_name
= 0;
5834 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5836 actual_name
= partial_die_full_name (pdi
, cu
);
5838 built_actual_name
= 1;
5840 if (actual_name
== NULL
)
5841 actual_name
= pdi
->name
;
5845 case DW_TAG_subprogram
:
5846 if (pdi
->is_external
|| cu
->language
== language_ada
)
5848 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
5849 of the global scope. But in Ada, we want to be able to access
5850 nested procedures globally. So all Ada subprograms are stored
5851 in the global scope. */
5852 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5853 mst_text, objfile); */
5854 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5856 VAR_DOMAIN
, LOC_BLOCK
,
5857 &objfile
->global_psymbols
,
5858 0, pdi
->lowpc
+ baseaddr
,
5859 cu
->language
, objfile
);
5863 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5864 mst_file_text, objfile); */
5865 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5867 VAR_DOMAIN
, LOC_BLOCK
,
5868 &objfile
->static_psymbols
,
5869 0, pdi
->lowpc
+ baseaddr
,
5870 cu
->language
, objfile
);
5873 case DW_TAG_constant
:
5875 struct psymbol_allocation_list
*list
;
5877 if (pdi
->is_external
)
5878 list
= &objfile
->global_psymbols
;
5880 list
= &objfile
->static_psymbols
;
5881 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5882 built_actual_name
, VAR_DOMAIN
, LOC_STATIC
,
5883 list
, 0, 0, cu
->language
, objfile
);
5886 case DW_TAG_variable
:
5888 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
5892 && !dwarf2_per_objfile
->has_section_at_zero
)
5894 /* A global or static variable may also have been stripped
5895 out by the linker if unused, in which case its address
5896 will be nullified; do not add such variables into partial
5897 symbol table then. */
5899 else if (pdi
->is_external
)
5902 Don't enter into the minimal symbol tables as there is
5903 a minimal symbol table entry from the ELF symbols already.
5904 Enter into partial symbol table if it has a location
5905 descriptor or a type.
5906 If the location descriptor is missing, new_symbol will create
5907 a LOC_UNRESOLVED symbol, the address of the variable will then
5908 be determined from the minimal symbol table whenever the variable
5910 The address for the partial symbol table entry is not
5911 used by GDB, but it comes in handy for debugging partial symbol
5914 if (pdi
->d
.locdesc
|| pdi
->has_type
)
5915 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5917 VAR_DOMAIN
, LOC_STATIC
,
5918 &objfile
->global_psymbols
,
5920 cu
->language
, objfile
);
5924 /* Static Variable. Skip symbols without location descriptors. */
5925 if (pdi
->d
.locdesc
== NULL
)
5927 if (built_actual_name
)
5928 xfree (actual_name
);
5931 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
5932 mst_file_data, objfile); */
5933 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5935 VAR_DOMAIN
, LOC_STATIC
,
5936 &objfile
->static_psymbols
,
5938 cu
->language
, objfile
);
5941 case DW_TAG_typedef
:
5942 case DW_TAG_base_type
:
5943 case DW_TAG_subrange_type
:
5944 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5946 VAR_DOMAIN
, LOC_TYPEDEF
,
5947 &objfile
->static_psymbols
,
5948 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5950 case DW_TAG_namespace
:
5951 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5953 VAR_DOMAIN
, LOC_TYPEDEF
,
5954 &objfile
->global_psymbols
,
5955 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5957 case DW_TAG_class_type
:
5958 case DW_TAG_interface_type
:
5959 case DW_TAG_structure_type
:
5960 case DW_TAG_union_type
:
5961 case DW_TAG_enumeration_type
:
5962 /* Skip external references. The DWARF standard says in the section
5963 about "Structure, Union, and Class Type Entries": "An incomplete
5964 structure, union or class type is represented by a structure,
5965 union or class entry that does not have a byte size attribute
5966 and that has a DW_AT_declaration attribute." */
5967 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
5969 if (built_actual_name
)
5970 xfree (actual_name
);
5974 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
5975 static vs. global. */
5976 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5978 STRUCT_DOMAIN
, LOC_TYPEDEF
,
5979 (cu
->language
== language_cplus
5980 || cu
->language
== language_java
)
5981 ? &objfile
->global_psymbols
5982 : &objfile
->static_psymbols
,
5983 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5986 case DW_TAG_enumerator
:
5987 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5989 VAR_DOMAIN
, LOC_CONST
,
5990 (cu
->language
== language_cplus
5991 || cu
->language
== language_java
)
5992 ? &objfile
->global_psymbols
5993 : &objfile
->static_psymbols
,
5994 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6000 if (built_actual_name
)
6001 xfree (actual_name
);
6004 /* Read a partial die corresponding to a namespace; also, add a symbol
6005 corresponding to that namespace to the symbol table. NAMESPACE is
6006 the name of the enclosing namespace. */
6009 add_partial_namespace (struct partial_die_info
*pdi
,
6010 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6011 int need_pc
, struct dwarf2_cu
*cu
)
6013 /* Add a symbol for the namespace. */
6015 add_partial_symbol (pdi
, cu
);
6017 /* Now scan partial symbols in that namespace. */
6019 if (pdi
->has_children
)
6020 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
6023 /* Read a partial die corresponding to a Fortran module. */
6026 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
6027 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
6029 /* Now scan partial symbols in that module. */
6031 if (pdi
->has_children
)
6032 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
6035 /* Read a partial die corresponding to a subprogram and create a partial
6036 symbol for that subprogram. When the CU language allows it, this
6037 routine also defines a partial symbol for each nested subprogram
6038 that this subprogram contains.
6040 DIE my also be a lexical block, in which case we simply search
6041 recursively for suprograms defined inside that lexical block.
6042 Again, this is only performed when the CU language allows this
6043 type of definitions. */
6046 add_partial_subprogram (struct partial_die_info
*pdi
,
6047 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6048 int need_pc
, struct dwarf2_cu
*cu
)
6050 if (pdi
->tag
== DW_TAG_subprogram
)
6052 if (pdi
->has_pc_info
)
6054 if (pdi
->lowpc
< *lowpc
)
6055 *lowpc
= pdi
->lowpc
;
6056 if (pdi
->highpc
> *highpc
)
6057 *highpc
= pdi
->highpc
;
6061 struct objfile
*objfile
= cu
->objfile
;
6063 baseaddr
= ANOFFSET (objfile
->section_offsets
,
6064 SECT_OFF_TEXT (objfile
));
6065 addrmap_set_empty (objfile
->psymtabs_addrmap
,
6066 pdi
->lowpc
+ baseaddr
,
6067 pdi
->highpc
- 1 + baseaddr
,
6068 cu
->per_cu
->v
.psymtab
);
6072 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
6074 if (!pdi
->is_declaration
)
6075 /* Ignore subprogram DIEs that do not have a name, they are
6076 illegal. Do not emit a complaint at this point, we will
6077 do so when we convert this psymtab into a symtab. */
6079 add_partial_symbol (pdi
, cu
);
6083 if (! pdi
->has_children
)
6086 if (cu
->language
== language_ada
)
6088 pdi
= pdi
->die_child
;
6091 fixup_partial_die (pdi
, cu
);
6092 if (pdi
->tag
== DW_TAG_subprogram
6093 || pdi
->tag
== DW_TAG_lexical_block
)
6094 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
6095 pdi
= pdi
->die_sibling
;
6100 /* Read a partial die corresponding to an enumeration type. */
6103 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
6104 struct dwarf2_cu
*cu
)
6106 struct partial_die_info
*pdi
;
6108 if (enum_pdi
->name
!= NULL
)
6109 add_partial_symbol (enum_pdi
, cu
);
6111 pdi
= enum_pdi
->die_child
;
6114 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
6115 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6117 add_partial_symbol (pdi
, cu
);
6118 pdi
= pdi
->die_sibling
;
6122 /* Return the initial uleb128 in the die at INFO_PTR. */
6125 peek_abbrev_code (bfd
*abfd
, gdb_byte
*info_ptr
)
6127 unsigned int bytes_read
;
6129 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6132 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
6133 Return the corresponding abbrev, or NULL if the number is zero (indicating
6134 an empty DIE). In either case *BYTES_READ will be set to the length of
6135 the initial number. */
6137 static struct abbrev_info
*
6138 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
6139 struct dwarf2_cu
*cu
)
6141 bfd
*abfd
= cu
->objfile
->obfd
;
6142 unsigned int abbrev_number
;
6143 struct abbrev_info
*abbrev
;
6145 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
6147 if (abbrev_number
== 0)
6150 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
6153 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
6154 abbrev_number
, bfd_get_filename (abfd
));
6160 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6161 Returns a pointer to the end of a series of DIEs, terminated by an empty
6162 DIE. Any children of the skipped DIEs will also be skipped. */
6165 skip_children (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
)
6167 struct dwarf2_cu
*cu
= reader
->cu
;
6168 struct abbrev_info
*abbrev
;
6169 unsigned int bytes_read
;
6173 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6175 return info_ptr
+ bytes_read
;
6177 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
6181 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6182 INFO_PTR should point just after the initial uleb128 of a DIE, and the
6183 abbrev corresponding to that skipped uleb128 should be passed in
6184 ABBREV. Returns a pointer to this DIE's sibling, skipping any
6188 skip_one_die (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
,
6189 struct abbrev_info
*abbrev
)
6191 unsigned int bytes_read
;
6192 struct attribute attr
;
6193 bfd
*abfd
= reader
->abfd
;
6194 struct dwarf2_cu
*cu
= reader
->cu
;
6195 gdb_byte
*buffer
= reader
->buffer
;
6196 const gdb_byte
*buffer_end
= reader
->buffer_end
;
6197 gdb_byte
*start_info_ptr
= info_ptr
;
6198 unsigned int form
, i
;
6200 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
6202 /* The only abbrev we care about is DW_AT_sibling. */
6203 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
6205 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
6206 if (attr
.form
== DW_FORM_ref_addr
)
6207 complaint (&symfile_complaints
,
6208 _("ignoring absolute DW_AT_sibling"));
6210 return buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
6213 /* If it isn't DW_AT_sibling, skip this attribute. */
6214 form
= abbrev
->attrs
[i
].form
;
6218 case DW_FORM_ref_addr
:
6219 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
6220 and later it is offset sized. */
6221 if (cu
->header
.version
== 2)
6222 info_ptr
+= cu
->header
.addr_size
;
6224 info_ptr
+= cu
->header
.offset_size
;
6226 case DW_FORM_GNU_ref_alt
:
6227 info_ptr
+= cu
->header
.offset_size
;
6230 info_ptr
+= cu
->header
.addr_size
;
6237 case DW_FORM_flag_present
:
6249 case DW_FORM_ref_sig8
:
6252 case DW_FORM_string
:
6253 read_direct_string (abfd
, info_ptr
, &bytes_read
);
6254 info_ptr
+= bytes_read
;
6256 case DW_FORM_sec_offset
:
6258 case DW_FORM_GNU_strp_alt
:
6259 info_ptr
+= cu
->header
.offset_size
;
6261 case DW_FORM_exprloc
:
6263 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6264 info_ptr
+= bytes_read
;
6266 case DW_FORM_block1
:
6267 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
6269 case DW_FORM_block2
:
6270 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
6272 case DW_FORM_block4
:
6273 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
6277 case DW_FORM_ref_udata
:
6278 case DW_FORM_GNU_addr_index
:
6279 case DW_FORM_GNU_str_index
:
6280 info_ptr
= (gdb_byte
*) safe_skip_leb128 (info_ptr
, buffer_end
);
6282 case DW_FORM_indirect
:
6283 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6284 info_ptr
+= bytes_read
;
6285 /* We need to continue parsing from here, so just go back to
6287 goto skip_attribute
;
6290 error (_("Dwarf Error: Cannot handle %s "
6291 "in DWARF reader [in module %s]"),
6292 dwarf_form_name (form
),
6293 bfd_get_filename (abfd
));
6297 if (abbrev
->has_children
)
6298 return skip_children (reader
, info_ptr
);
6303 /* Locate ORIG_PDI's sibling.
6304 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
6307 locate_pdi_sibling (const struct die_reader_specs
*reader
,
6308 struct partial_die_info
*orig_pdi
,
6311 /* Do we know the sibling already? */
6313 if (orig_pdi
->sibling
)
6314 return orig_pdi
->sibling
;
6316 /* Are there any children to deal with? */
6318 if (!orig_pdi
->has_children
)
6321 /* Skip the children the long way. */
6323 return skip_children (reader
, info_ptr
);
6326 /* Expand this partial symbol table into a full symbol table. */
6329 dwarf2_psymtab_to_symtab (struct objfile
*objfile
, struct partial_symtab
*pst
)
6335 warning (_("bug: psymtab for %s is already read in."),
6342 printf_filtered (_("Reading in symbols for %s..."),
6344 gdb_flush (gdb_stdout
);
6347 /* Restore our global data. */
6348 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
6350 /* If this psymtab is constructed from a debug-only objfile, the
6351 has_section_at_zero flag will not necessarily be correct. We
6352 can get the correct value for this flag by looking at the data
6353 associated with the (presumably stripped) associated objfile. */
6354 if (objfile
->separate_debug_objfile_backlink
)
6356 struct dwarf2_per_objfile
*dpo_backlink
6357 = objfile_data (objfile
->separate_debug_objfile_backlink
,
6358 dwarf2_objfile_data_key
);
6360 dwarf2_per_objfile
->has_section_at_zero
6361 = dpo_backlink
->has_section_at_zero
;
6364 dwarf2_per_objfile
->reading_partial_symbols
= 0;
6366 psymtab_to_symtab_1 (pst
);
6368 /* Finish up the debug error message. */
6370 printf_filtered (_("done.\n"));
6374 process_cu_includes ();
6377 /* Reading in full CUs. */
6379 /* Add PER_CU to the queue. */
6382 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
6383 enum language pretend_language
)
6385 struct dwarf2_queue_item
*item
;
6388 item
= xmalloc (sizeof (*item
));
6389 item
->per_cu
= per_cu
;
6390 item
->pretend_language
= pretend_language
;
6393 if (dwarf2_queue
== NULL
)
6394 dwarf2_queue
= item
;
6396 dwarf2_queue_tail
->next
= item
;
6398 dwarf2_queue_tail
= item
;
6401 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
6402 unit and add it to our queue.
6403 The result is non-zero if PER_CU was queued, otherwise the result is zero
6404 meaning either PER_CU is already queued or it is already loaded. */
6407 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
6408 struct dwarf2_per_cu_data
*per_cu
,
6409 enum language pretend_language
)
6411 /* We may arrive here during partial symbol reading, if we need full
6412 DIEs to process an unusual case (e.g. template arguments). Do
6413 not queue PER_CU, just tell our caller to load its DIEs. */
6414 if (dwarf2_per_objfile
->reading_partial_symbols
)
6416 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
6421 /* Mark the dependence relation so that we don't flush PER_CU
6423 dwarf2_add_dependence (this_cu
, per_cu
);
6425 /* If it's already on the queue, we have nothing to do. */
6429 /* If the compilation unit is already loaded, just mark it as
6431 if (per_cu
->cu
!= NULL
)
6433 per_cu
->cu
->last_used
= 0;
6437 /* Add it to the queue. */
6438 queue_comp_unit (per_cu
, pretend_language
);
6443 /* Process the queue. */
6446 process_queue (void)
6448 struct dwarf2_queue_item
*item
, *next_item
;
6450 if (dwarf2_read_debug
)
6452 fprintf_unfiltered (gdb_stdlog
,
6453 "Expanding one or more symtabs of objfile %s ...\n",
6454 dwarf2_per_objfile
->objfile
->name
);
6457 /* The queue starts out with one item, but following a DIE reference
6458 may load a new CU, adding it to the end of the queue. */
6459 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
6461 if (dwarf2_per_objfile
->using_index
6462 ? !item
->per_cu
->v
.quick
->symtab
6463 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
6465 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
6467 if (dwarf2_read_debug
)
6469 fprintf_unfiltered (gdb_stdlog
,
6470 "Expanding symtab of %s at offset 0x%x\n",
6471 per_cu
->is_debug_types
? "TU" : "CU",
6472 per_cu
->offset
.sect_off
);
6475 if (per_cu
->is_debug_types
)
6476 process_full_type_unit (per_cu
, item
->pretend_language
);
6478 process_full_comp_unit (per_cu
, item
->pretend_language
);
6480 if (dwarf2_read_debug
)
6482 fprintf_unfiltered (gdb_stdlog
,
6483 "Done expanding %s at offset 0x%x\n",
6484 per_cu
->is_debug_types
? "TU" : "CU",
6485 per_cu
->offset
.sect_off
);
6489 item
->per_cu
->queued
= 0;
6490 next_item
= item
->next
;
6494 dwarf2_queue_tail
= NULL
;
6496 if (dwarf2_read_debug
)
6498 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
6499 dwarf2_per_objfile
->objfile
->name
);
6503 /* Free all allocated queue entries. This function only releases anything if
6504 an error was thrown; if the queue was processed then it would have been
6505 freed as we went along. */
6508 dwarf2_release_queue (void *dummy
)
6510 struct dwarf2_queue_item
*item
, *last
;
6512 item
= dwarf2_queue
;
6515 /* Anything still marked queued is likely to be in an
6516 inconsistent state, so discard it. */
6517 if (item
->per_cu
->queued
)
6519 if (item
->per_cu
->cu
!= NULL
)
6520 free_one_cached_comp_unit (item
->per_cu
);
6521 item
->per_cu
->queued
= 0;
6529 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
6532 /* Read in full symbols for PST, and anything it depends on. */
6535 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
6537 struct dwarf2_per_cu_data
*per_cu
;
6543 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
6544 if (!pst
->dependencies
[i
]->readin
6545 && pst
->dependencies
[i
]->user
== NULL
)
6547 /* Inform about additional files that need to be read in. */
6550 /* FIXME: i18n: Need to make this a single string. */
6551 fputs_filtered (" ", gdb_stdout
);
6553 fputs_filtered ("and ", gdb_stdout
);
6555 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
6556 wrap_here (""); /* Flush output. */
6557 gdb_flush (gdb_stdout
);
6559 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
6562 per_cu
= pst
->read_symtab_private
;
6566 /* It's an include file, no symbols to read for it.
6567 Everything is in the parent symtab. */
6572 dw2_do_instantiate_symtab (per_cu
);
6575 /* Trivial hash function for die_info: the hash value of a DIE
6576 is its offset in .debug_info for this objfile. */
6579 die_hash (const void *item
)
6581 const struct die_info
*die
= item
;
6583 return die
->offset
.sect_off
;
6586 /* Trivial comparison function for die_info structures: two DIEs
6587 are equal if they have the same offset. */
6590 die_eq (const void *item_lhs
, const void *item_rhs
)
6592 const struct die_info
*die_lhs
= item_lhs
;
6593 const struct die_info
*die_rhs
= item_rhs
;
6595 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
6598 /* die_reader_func for load_full_comp_unit.
6599 This is identical to read_signatured_type_reader,
6600 but is kept separate for now. */
6603 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
6605 struct die_info
*comp_unit_die
,
6609 struct dwarf2_cu
*cu
= reader
->cu
;
6610 enum language
*language_ptr
= data
;
6612 gdb_assert (cu
->die_hash
== NULL
);
6614 htab_create_alloc_ex (cu
->header
.length
/ 12,
6618 &cu
->comp_unit_obstack
,
6619 hashtab_obstack_allocate
,
6620 dummy_obstack_deallocate
);
6623 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
6624 &info_ptr
, comp_unit_die
);
6625 cu
->dies
= comp_unit_die
;
6626 /* comp_unit_die is not stored in die_hash, no need. */
6628 /* We try not to read any attributes in this function, because not
6629 all CUs needed for references have been loaded yet, and symbol
6630 table processing isn't initialized. But we have to set the CU language,
6631 or we won't be able to build types correctly.
6632 Similarly, if we do not read the producer, we can not apply
6633 producer-specific interpretation. */
6634 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
6637 /* Load the DIEs associated with PER_CU into memory. */
6640 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6641 enum language pretend_language
)
6643 gdb_assert (! this_cu
->is_debug_types
);
6645 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6646 load_full_comp_unit_reader
, &pretend_language
);
6649 /* Add a DIE to the delayed physname list. */
6652 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
6653 const char *name
, struct die_info
*die
,
6654 struct dwarf2_cu
*cu
)
6656 struct delayed_method_info mi
;
6658 mi
.fnfield_index
= fnfield_index
;
6662 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
6665 /* A cleanup for freeing the delayed method list. */
6668 free_delayed_list (void *ptr
)
6670 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
6671 if (cu
->method_list
!= NULL
)
6673 VEC_free (delayed_method_info
, cu
->method_list
);
6674 cu
->method_list
= NULL
;
6678 /* Compute the physnames of any methods on the CU's method list.
6680 The computation of method physnames is delayed in order to avoid the
6681 (bad) condition that one of the method's formal parameters is of an as yet
6685 compute_delayed_physnames (struct dwarf2_cu
*cu
)
6688 struct delayed_method_info
*mi
;
6689 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
6691 const char *physname
;
6692 struct fn_fieldlist
*fn_flp
6693 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
6694 physname
= dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
6695 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
6699 /* Go objects should be embedded in a DW_TAG_module DIE,
6700 and it's not clear if/how imported objects will appear.
6701 To keep Go support simple until that's worked out,
6702 go back through what we've read and create something usable.
6703 We could do this while processing each DIE, and feels kinda cleaner,
6704 but that way is more invasive.
6705 This is to, for example, allow the user to type "p var" or "b main"
6706 without having to specify the package name, and allow lookups
6707 of module.object to work in contexts that use the expression
6711 fixup_go_packaging (struct dwarf2_cu
*cu
)
6713 char *package_name
= NULL
;
6714 struct pending
*list
;
6717 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
6719 for (i
= 0; i
< list
->nsyms
; ++i
)
6721 struct symbol
*sym
= list
->symbol
[i
];
6723 if (SYMBOL_LANGUAGE (sym
) == language_go
6724 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
6726 char *this_package_name
= go_symbol_package_name (sym
);
6728 if (this_package_name
== NULL
)
6730 if (package_name
== NULL
)
6731 package_name
= this_package_name
;
6734 if (strcmp (package_name
, this_package_name
) != 0)
6735 complaint (&symfile_complaints
,
6736 _("Symtab %s has objects from two different Go packages: %s and %s"),
6737 (SYMBOL_SYMTAB (sym
)
6738 && SYMBOL_SYMTAB (sym
)->filename
6739 ? SYMBOL_SYMTAB (sym
)->filename
6740 : cu
->objfile
->name
),
6741 this_package_name
, package_name
);
6742 xfree (this_package_name
);
6748 if (package_name
!= NULL
)
6750 struct objfile
*objfile
= cu
->objfile
;
6751 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
6752 package_name
, objfile
);
6755 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
6757 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
6758 SYMBOL_SET_LANGUAGE (sym
, language_go
);
6759 SYMBOL_SET_NAMES (sym
, package_name
, strlen (package_name
), 1, objfile
);
6760 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
6761 e.g., "main" finds the "main" module and not C's main(). */
6762 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
6763 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
6764 SYMBOL_TYPE (sym
) = type
;
6766 add_symbol_to_list (sym
, &global_symbols
);
6768 xfree (package_name
);
6772 static void compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
);
6774 /* Return the symtab for PER_CU. This works properly regardless of
6775 whether we're using the index or psymtabs. */
6777 static struct symtab
*
6778 get_symtab (struct dwarf2_per_cu_data
*per_cu
)
6780 return (dwarf2_per_objfile
->using_index
6781 ? per_cu
->v
.quick
->symtab
6782 : per_cu
->v
.psymtab
->symtab
);
6785 /* A helper function for computing the list of all symbol tables
6786 included by PER_CU. */
6789 recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr
) **result
,
6790 htab_t all_children
,
6791 struct dwarf2_per_cu_data
*per_cu
)
6795 struct dwarf2_per_cu_data
*iter
;
6797 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
6800 /* This inclusion and its children have been processed. */
6805 /* Only add a CU if it has a symbol table. */
6806 if (get_symtab (per_cu
) != NULL
)
6807 VEC_safe_push (dwarf2_per_cu_ptr
, *result
, per_cu
);
6810 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
, ix
, iter
);
6812 recursively_compute_inclusions (result
, all_children
, iter
);
6815 /* Compute the symtab 'includes' fields for the symtab related to
6819 compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
6821 gdb_assert (! per_cu
->is_debug_types
);
6823 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
))
6826 struct dwarf2_per_cu_data
*iter
;
6827 VEC (dwarf2_per_cu_ptr
) *result_children
= NULL
;
6828 htab_t all_children
;
6829 struct symtab
*symtab
= get_symtab (per_cu
);
6831 /* If we don't have a symtab, we can just skip this case. */
6835 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
6836 NULL
, xcalloc
, xfree
);
6839 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
,
6842 recursively_compute_inclusions (&result_children
, all_children
, iter
);
6844 /* Now we have a transitive closure of all the included CUs, so
6845 we can convert it to a list of symtabs. */
6846 len
= VEC_length (dwarf2_per_cu_ptr
, result_children
);
6848 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
6849 (len
+ 1) * sizeof (struct symtab
*));
6851 VEC_iterate (dwarf2_per_cu_ptr
, result_children
, ix
, iter
);
6853 symtab
->includes
[ix
] = get_symtab (iter
);
6854 symtab
->includes
[len
] = NULL
;
6856 VEC_free (dwarf2_per_cu_ptr
, result_children
);
6857 htab_delete (all_children
);
6861 /* Compute the 'includes' field for the symtabs of all the CUs we just
6865 process_cu_includes (void)
6868 struct dwarf2_per_cu_data
*iter
;
6871 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
6875 if (! iter
->is_debug_types
)
6876 compute_symtab_includes (iter
);
6879 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
6882 /* Generate full symbol information for PER_CU, whose DIEs have
6883 already been loaded into memory. */
6886 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
6887 enum language pretend_language
)
6889 struct dwarf2_cu
*cu
= per_cu
->cu
;
6890 struct objfile
*objfile
= per_cu
->objfile
;
6891 CORE_ADDR lowpc
, highpc
;
6892 struct symtab
*symtab
;
6893 struct cleanup
*back_to
, *delayed_list_cleanup
;
6895 struct block
*static_block
;
6897 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6900 back_to
= make_cleanup (really_free_pendings
, NULL
);
6901 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
6903 cu
->list_in_scope
= &file_symbols
;
6905 cu
->language
= pretend_language
;
6906 cu
->language_defn
= language_def (cu
->language
);
6908 /* Do line number decoding in read_file_scope () */
6909 process_die (cu
->dies
, cu
);
6911 /* For now fudge the Go package. */
6912 if (cu
->language
== language_go
)
6913 fixup_go_packaging (cu
);
6915 /* Now that we have processed all the DIEs in the CU, all the types
6916 should be complete, and it should now be safe to compute all of the
6918 compute_delayed_physnames (cu
);
6919 do_cleanups (delayed_list_cleanup
);
6921 /* Some compilers don't define a DW_AT_high_pc attribute for the
6922 compilation unit. If the DW_AT_high_pc is missing, synthesize
6923 it, by scanning the DIE's below the compilation unit. */
6924 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
6927 = end_symtab_get_static_block (highpc
+ baseaddr
, objfile
, 0,
6928 per_cu
->s
.imported_symtabs
!= NULL
);
6930 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
6931 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
6932 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
6933 addrmap to help ensure it has an accurate map of pc values belonging to
6935 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
6937 symtab
= end_symtab_from_static_block (static_block
, objfile
,
6938 SECT_OFF_TEXT (objfile
), 0);
6942 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
6944 /* Set symtab language to language from DW_AT_language. If the
6945 compilation is from a C file generated by language preprocessors, do
6946 not set the language if it was already deduced by start_subfile. */
6947 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
6948 symtab
->language
= cu
->language
;
6950 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
6951 produce DW_AT_location with location lists but it can be possibly
6952 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
6953 there were bugs in prologue debug info, fixed later in GCC-4.5
6954 by "unwind info for epilogues" patch (which is not directly related).
6956 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
6957 needed, it would be wrong due to missing DW_AT_producer there.
6959 Still one can confuse GDB by using non-standard GCC compilation
6960 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
6962 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
6963 symtab
->locations_valid
= 1;
6965 if (gcc_4_minor
>= 5)
6966 symtab
->epilogue_unwind_valid
= 1;
6968 symtab
->call_site_htab
= cu
->call_site_htab
;
6971 if (dwarf2_per_objfile
->using_index
)
6972 per_cu
->v
.quick
->symtab
= symtab
;
6975 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6976 pst
->symtab
= symtab
;
6980 /* Push it for inclusion processing later. */
6981 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
6983 do_cleanups (back_to
);
6986 /* Generate full symbol information for type unit PER_CU, whose DIEs have
6987 already been loaded into memory. */
6990 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
6991 enum language pretend_language
)
6993 struct dwarf2_cu
*cu
= per_cu
->cu
;
6994 struct objfile
*objfile
= per_cu
->objfile
;
6995 struct symtab
*symtab
;
6996 struct cleanup
*back_to
, *delayed_list_cleanup
;
6999 back_to
= make_cleanup (really_free_pendings
, NULL
);
7000 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
7002 cu
->list_in_scope
= &file_symbols
;
7004 cu
->language
= pretend_language
;
7005 cu
->language_defn
= language_def (cu
->language
);
7007 /* The symbol tables are set up in read_type_unit_scope. */
7008 process_die (cu
->dies
, cu
);
7010 /* For now fudge the Go package. */
7011 if (cu
->language
== language_go
)
7012 fixup_go_packaging (cu
);
7014 /* Now that we have processed all the DIEs in the CU, all the types
7015 should be complete, and it should now be safe to compute all of the
7017 compute_delayed_physnames (cu
);
7018 do_cleanups (delayed_list_cleanup
);
7020 /* TUs share symbol tables.
7021 If this is the first TU to use this symtab, complete the construction
7022 of it with end_expandable_symtab. Otherwise, complete the addition of
7023 this TU's symbols to the existing symtab. */
7024 if (per_cu
->s
.type_unit_group
->primary_symtab
== NULL
)
7026 symtab
= end_expandable_symtab (0, objfile
, SECT_OFF_TEXT (objfile
));
7027 per_cu
->s
.type_unit_group
->primary_symtab
= symtab
;
7031 /* Set symtab language to language from DW_AT_language. If the
7032 compilation is from a C file generated by language preprocessors,
7033 do not set the language if it was already deduced by
7035 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
7036 symtab
->language
= cu
->language
;
7041 augment_type_symtab (objfile
,
7042 per_cu
->s
.type_unit_group
->primary_symtab
);
7043 symtab
= per_cu
->s
.type_unit_group
->primary_symtab
;
7046 if (dwarf2_per_objfile
->using_index
)
7047 per_cu
->v
.quick
->symtab
= symtab
;
7050 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7051 pst
->symtab
= symtab
;
7055 do_cleanups (back_to
);
7058 /* Process an imported unit DIE. */
7061 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7063 struct attribute
*attr
;
7065 /* For now we don't handle imported units in type units. */
7066 if (cu
->per_cu
->is_debug_types
)
7068 error (_("Dwarf Error: DW_TAG_imported_unit is not"
7069 " supported in type units [in module %s]"),
7073 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7076 struct dwarf2_per_cu_data
*per_cu
;
7077 struct symtab
*imported_symtab
;
7081 offset
= dwarf2_get_ref_die_offset (attr
);
7082 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
7083 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
7085 /* Queue the unit, if needed. */
7086 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
7087 load_full_comp_unit (per_cu
, cu
->language
);
7089 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
,
7094 /* Process a die and its children. */
7097 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7101 case DW_TAG_padding
:
7103 case DW_TAG_compile_unit
:
7104 case DW_TAG_partial_unit
:
7105 read_file_scope (die
, cu
);
7107 case DW_TAG_type_unit
:
7108 read_type_unit_scope (die
, cu
);
7110 case DW_TAG_subprogram
:
7111 case DW_TAG_inlined_subroutine
:
7112 read_func_scope (die
, cu
);
7114 case DW_TAG_lexical_block
:
7115 case DW_TAG_try_block
:
7116 case DW_TAG_catch_block
:
7117 read_lexical_block_scope (die
, cu
);
7119 case DW_TAG_GNU_call_site
:
7120 read_call_site_scope (die
, cu
);
7122 case DW_TAG_class_type
:
7123 case DW_TAG_interface_type
:
7124 case DW_TAG_structure_type
:
7125 case DW_TAG_union_type
:
7126 process_structure_scope (die
, cu
);
7128 case DW_TAG_enumeration_type
:
7129 process_enumeration_scope (die
, cu
);
7132 /* These dies have a type, but processing them does not create
7133 a symbol or recurse to process the children. Therefore we can
7134 read them on-demand through read_type_die. */
7135 case DW_TAG_subroutine_type
:
7136 case DW_TAG_set_type
:
7137 case DW_TAG_array_type
:
7138 case DW_TAG_pointer_type
:
7139 case DW_TAG_ptr_to_member_type
:
7140 case DW_TAG_reference_type
:
7141 case DW_TAG_string_type
:
7144 case DW_TAG_base_type
:
7145 case DW_TAG_subrange_type
:
7146 case DW_TAG_typedef
:
7147 /* Add a typedef symbol for the type definition, if it has a
7149 new_symbol (die
, read_type_die (die
, cu
), cu
);
7151 case DW_TAG_common_block
:
7152 read_common_block (die
, cu
);
7154 case DW_TAG_common_inclusion
:
7156 case DW_TAG_namespace
:
7157 processing_has_namespace_info
= 1;
7158 read_namespace (die
, cu
);
7161 processing_has_namespace_info
= 1;
7162 read_module (die
, cu
);
7164 case DW_TAG_imported_declaration
:
7165 case DW_TAG_imported_module
:
7166 processing_has_namespace_info
= 1;
7167 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
7168 || cu
->language
!= language_fortran
))
7169 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
7170 dwarf_tag_name (die
->tag
));
7171 read_import_statement (die
, cu
);
7174 case DW_TAG_imported_unit
:
7175 process_imported_unit_die (die
, cu
);
7179 new_symbol (die
, NULL
, cu
);
7184 /* A helper function for dwarf2_compute_name which determines whether DIE
7185 needs to have the name of the scope prepended to the name listed in the
7189 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
7191 struct attribute
*attr
;
7195 case DW_TAG_namespace
:
7196 case DW_TAG_typedef
:
7197 case DW_TAG_class_type
:
7198 case DW_TAG_interface_type
:
7199 case DW_TAG_structure_type
:
7200 case DW_TAG_union_type
:
7201 case DW_TAG_enumeration_type
:
7202 case DW_TAG_enumerator
:
7203 case DW_TAG_subprogram
:
7207 case DW_TAG_variable
:
7208 case DW_TAG_constant
:
7209 /* We only need to prefix "globally" visible variables. These include
7210 any variable marked with DW_AT_external or any variable that
7211 lives in a namespace. [Variables in anonymous namespaces
7212 require prefixing, but they are not DW_AT_external.] */
7214 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
7216 struct dwarf2_cu
*spec_cu
= cu
;
7218 return die_needs_namespace (die_specification (die
, &spec_cu
),
7222 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
7223 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
7224 && die
->parent
->tag
!= DW_TAG_module
)
7226 /* A variable in a lexical block of some kind does not need a
7227 namespace, even though in C++ such variables may be external
7228 and have a mangled name. */
7229 if (die
->parent
->tag
== DW_TAG_lexical_block
7230 || die
->parent
->tag
== DW_TAG_try_block
7231 || die
->parent
->tag
== DW_TAG_catch_block
7232 || die
->parent
->tag
== DW_TAG_subprogram
)
7241 /* Retrieve the last character from a mem_file. */
7244 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
7246 char *last_char_p
= (char *) object
;
7249 *last_char_p
= buffer
[length
- 1];
7252 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
7253 compute the physname for the object, which include a method's:
7254 - formal parameters (C++/Java),
7255 - receiver type (Go),
7256 - return type (Java).
7258 The term "physname" is a bit confusing.
7259 For C++, for example, it is the demangled name.
7260 For Go, for example, it's the mangled name.
7262 For Ada, return the DIE's linkage name rather than the fully qualified
7263 name. PHYSNAME is ignored..
7265 The result is allocated on the objfile_obstack and canonicalized. */
7268 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
7271 struct objfile
*objfile
= cu
->objfile
;
7274 name
= dwarf2_name (die
, cu
);
7276 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
7277 compute it by typename_concat inside GDB. */
7278 if (cu
->language
== language_ada
7279 || (cu
->language
== language_fortran
&& physname
))
7281 /* For Ada unit, we prefer the linkage name over the name, as
7282 the former contains the exported name, which the user expects
7283 to be able to reference. Ideally, we want the user to be able
7284 to reference this entity using either natural or linkage name,
7285 but we haven't started looking at this enhancement yet. */
7286 struct attribute
*attr
;
7288 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7290 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7291 if (attr
&& DW_STRING (attr
))
7292 return DW_STRING (attr
);
7295 /* These are the only languages we know how to qualify names in. */
7297 && (cu
->language
== language_cplus
|| cu
->language
== language_java
7298 || cu
->language
== language_fortran
))
7300 if (die_needs_namespace (die
, cu
))
7304 struct ui_file
*buf
;
7306 prefix
= determine_prefix (die
, cu
);
7307 buf
= mem_fileopen ();
7308 if (*prefix
!= '\0')
7310 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
7313 fputs_unfiltered (prefixed_name
, buf
);
7314 xfree (prefixed_name
);
7317 fputs_unfiltered (name
, buf
);
7319 /* Template parameters may be specified in the DIE's DW_AT_name, or
7320 as children with DW_TAG_template_type_param or
7321 DW_TAG_value_type_param. If the latter, add them to the name
7322 here. If the name already has template parameters, then
7323 skip this step; some versions of GCC emit both, and
7324 it is more efficient to use the pre-computed name.
7326 Something to keep in mind about this process: it is very
7327 unlikely, or in some cases downright impossible, to produce
7328 something that will match the mangled name of a function.
7329 If the definition of the function has the same debug info,
7330 we should be able to match up with it anyway. But fallbacks
7331 using the minimal symbol, for instance to find a method
7332 implemented in a stripped copy of libstdc++, will not work.
7333 If we do not have debug info for the definition, we will have to
7334 match them up some other way.
7336 When we do name matching there is a related problem with function
7337 templates; two instantiated function templates are allowed to
7338 differ only by their return types, which we do not add here. */
7340 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
7342 struct attribute
*attr
;
7343 struct die_info
*child
;
7346 die
->building_fullname
= 1;
7348 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
7353 struct dwarf2_locexpr_baton
*baton
;
7356 if (child
->tag
!= DW_TAG_template_type_param
7357 && child
->tag
!= DW_TAG_template_value_param
)
7362 fputs_unfiltered ("<", buf
);
7366 fputs_unfiltered (", ", buf
);
7368 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
7371 complaint (&symfile_complaints
,
7372 _("template parameter missing DW_AT_type"));
7373 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
7376 type
= die_type (child
, cu
);
7378 if (child
->tag
== DW_TAG_template_type_param
)
7380 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
7384 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
7387 complaint (&symfile_complaints
,
7388 _("template parameter missing "
7389 "DW_AT_const_value"));
7390 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
7394 dwarf2_const_value_attr (attr
, type
, name
,
7395 &cu
->comp_unit_obstack
, cu
,
7396 &value
, &bytes
, &baton
);
7398 if (TYPE_NOSIGN (type
))
7399 /* GDB prints characters as NUMBER 'CHAR'. If that's
7400 changed, this can use value_print instead. */
7401 c_printchar (value
, type
, buf
);
7404 struct value_print_options opts
;
7407 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
7411 else if (bytes
!= NULL
)
7413 v
= allocate_value (type
);
7414 memcpy (value_contents_writeable (v
), bytes
,
7415 TYPE_LENGTH (type
));
7418 v
= value_from_longest (type
, value
);
7420 /* Specify decimal so that we do not depend on
7422 get_formatted_print_options (&opts
, 'd');
7424 value_print (v
, buf
, &opts
);
7430 die
->building_fullname
= 0;
7434 /* Close the argument list, with a space if necessary
7435 (nested templates). */
7436 char last_char
= '\0';
7437 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
7438 if (last_char
== '>')
7439 fputs_unfiltered (" >", buf
);
7441 fputs_unfiltered (">", buf
);
7445 /* For Java and C++ methods, append formal parameter type
7446 information, if PHYSNAME. */
7448 if (physname
&& die
->tag
== DW_TAG_subprogram
7449 && (cu
->language
== language_cplus
7450 || cu
->language
== language_java
))
7452 struct type
*type
= read_type_die (die
, cu
);
7454 c_type_print_args (type
, buf
, 1, cu
->language
,
7455 &type_print_raw_options
);
7457 if (cu
->language
== language_java
)
7459 /* For java, we must append the return type to method
7461 if (die
->tag
== DW_TAG_subprogram
)
7462 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
7463 0, 0, &type_print_raw_options
);
7465 else if (cu
->language
== language_cplus
)
7467 /* Assume that an artificial first parameter is
7468 "this", but do not crash if it is not. RealView
7469 marks unnamed (and thus unused) parameters as
7470 artificial; there is no way to differentiate
7472 if (TYPE_NFIELDS (type
) > 0
7473 && TYPE_FIELD_ARTIFICIAL (type
, 0)
7474 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
7475 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
7477 fputs_unfiltered (" const", buf
);
7481 name
= ui_file_obsavestring (buf
, &objfile
->objfile_obstack
,
7483 ui_file_delete (buf
);
7485 if (cu
->language
== language_cplus
)
7488 = dwarf2_canonicalize_name (name
, cu
,
7489 &objfile
->objfile_obstack
);
7500 /* Return the fully qualified name of DIE, based on its DW_AT_name.
7501 If scope qualifiers are appropriate they will be added. The result
7502 will be allocated on the objfile_obstack, or NULL if the DIE does
7503 not have a name. NAME may either be from a previous call to
7504 dwarf2_name or NULL.
7506 The output string will be canonicalized (if C++/Java). */
7509 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7511 return dwarf2_compute_name (name
, die
, cu
, 0);
7514 /* Construct a physname for the given DIE in CU. NAME may either be
7515 from a previous call to dwarf2_name or NULL. The result will be
7516 allocated on the objfile_objstack or NULL if the DIE does not have a
7519 The output string will be canonicalized (if C++/Java). */
7522 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7524 struct objfile
*objfile
= cu
->objfile
;
7525 struct attribute
*attr
;
7526 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
7527 struct cleanup
*back_to
;
7530 /* In this case dwarf2_compute_name is just a shortcut not building anything
7532 if (!die_needs_namespace (die
, cu
))
7533 return dwarf2_compute_name (name
, die
, cu
, 1);
7535 back_to
= make_cleanup (null_cleanup
, NULL
);
7537 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7539 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7541 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
7543 if (attr
&& DW_STRING (attr
))
7547 mangled
= DW_STRING (attr
);
7549 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
7550 type. It is easier for GDB users to search for such functions as
7551 `name(params)' than `long name(params)'. In such case the minimal
7552 symbol names do not match the full symbol names but for template
7553 functions there is never a need to look up their definition from their
7554 declaration so the only disadvantage remains the minimal symbol
7555 variant `long name(params)' does not have the proper inferior type.
7558 if (cu
->language
== language_go
)
7560 /* This is a lie, but we already lie to the caller new_symbol_full.
7561 new_symbol_full assumes we return the mangled name.
7562 This just undoes that lie until things are cleaned up. */
7567 demangled
= cplus_demangle (mangled
,
7568 (DMGL_PARAMS
| DMGL_ANSI
7569 | (cu
->language
== language_java
7570 ? DMGL_JAVA
| DMGL_RET_POSTFIX
7575 make_cleanup (xfree
, demangled
);
7585 if (canon
== NULL
|| check_physname
)
7587 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
7589 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
7591 /* It may not mean a bug in GDB. The compiler could also
7592 compute DW_AT_linkage_name incorrectly. But in such case
7593 GDB would need to be bug-to-bug compatible. */
7595 complaint (&symfile_complaints
,
7596 _("Computed physname <%s> does not match demangled <%s> "
7597 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
7598 physname
, canon
, mangled
, die
->offset
.sect_off
, objfile
->name
);
7600 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
7601 is available here - over computed PHYSNAME. It is safer
7602 against both buggy GDB and buggy compilers. */
7616 retval
= obsavestring (retval
, strlen (retval
),
7617 &objfile
->objfile_obstack
);
7619 do_cleanups (back_to
);
7623 /* Read the import statement specified by the given die and record it. */
7626 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
7628 struct objfile
*objfile
= cu
->objfile
;
7629 struct attribute
*import_attr
;
7630 struct die_info
*imported_die
, *child_die
;
7631 struct dwarf2_cu
*imported_cu
;
7632 const char *imported_name
;
7633 const char *imported_name_prefix
;
7634 const char *canonical_name
;
7635 const char *import_alias
;
7636 const char *imported_declaration
= NULL
;
7637 const char *import_prefix
;
7638 VEC (const_char_ptr
) *excludes
= NULL
;
7639 struct cleanup
*cleanups
;
7643 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7644 if (import_attr
== NULL
)
7646 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7647 dwarf_tag_name (die
->tag
));
7652 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
7653 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7654 if (imported_name
== NULL
)
7656 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
7658 The import in the following code:
7672 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
7673 <52> DW_AT_decl_file : 1
7674 <53> DW_AT_decl_line : 6
7675 <54> DW_AT_import : <0x75>
7676 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
7678 <5b> DW_AT_decl_file : 1
7679 <5c> DW_AT_decl_line : 2
7680 <5d> DW_AT_type : <0x6e>
7682 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
7683 <76> DW_AT_byte_size : 4
7684 <77> DW_AT_encoding : 5 (signed)
7686 imports the wrong die ( 0x75 instead of 0x58 ).
7687 This case will be ignored until the gcc bug is fixed. */
7691 /* Figure out the local name after import. */
7692 import_alias
= dwarf2_name (die
, cu
);
7694 /* Figure out where the statement is being imported to. */
7695 import_prefix
= determine_prefix (die
, cu
);
7697 /* Figure out what the scope of the imported die is and prepend it
7698 to the name of the imported die. */
7699 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
7701 if (imported_die
->tag
!= DW_TAG_namespace
7702 && imported_die
->tag
!= DW_TAG_module
)
7704 imported_declaration
= imported_name
;
7705 canonical_name
= imported_name_prefix
;
7707 else if (strlen (imported_name_prefix
) > 0)
7709 temp
= alloca (strlen (imported_name_prefix
)
7710 + 2 + strlen (imported_name
) + 1);
7711 strcpy (temp
, imported_name_prefix
);
7712 strcat (temp
, "::");
7713 strcat (temp
, imported_name
);
7714 canonical_name
= temp
;
7717 canonical_name
= imported_name
;
7719 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
7721 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
7722 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
7723 child_die
= sibling_die (child_die
))
7725 /* DWARF-4: A Fortran use statement with a “rename list” may be
7726 represented by an imported module entry with an import attribute
7727 referring to the module and owned entries corresponding to those
7728 entities that are renamed as part of being imported. */
7730 if (child_die
->tag
!= DW_TAG_imported_declaration
)
7732 complaint (&symfile_complaints
,
7733 _("child DW_TAG_imported_declaration expected "
7734 "- DIE at 0x%x [in module %s]"),
7735 child_die
->offset
.sect_off
, objfile
->name
);
7739 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
7740 if (import_attr
== NULL
)
7742 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7743 dwarf_tag_name (child_die
->tag
));
7748 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
7750 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7751 if (imported_name
== NULL
)
7753 complaint (&symfile_complaints
,
7754 _("child DW_TAG_imported_declaration has unknown "
7755 "imported name - DIE at 0x%x [in module %s]"),
7756 child_die
->offset
.sect_off
, objfile
->name
);
7760 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
7762 process_die (child_die
, cu
);
7765 cp_add_using_directive (import_prefix
,
7768 imported_declaration
,
7770 &objfile
->objfile_obstack
);
7772 do_cleanups (cleanups
);
7775 /* Cleanup function for handle_DW_AT_stmt_list. */
7778 free_cu_line_header (void *arg
)
7780 struct dwarf2_cu
*cu
= arg
;
7782 free_line_header (cu
->line_header
);
7783 cu
->line_header
= NULL
;
7786 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
7787 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
7788 this, it was first present in GCC release 4.3.0. */
7791 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
7793 if (!cu
->checked_producer
)
7794 check_producer (cu
);
7796 return cu
->producer_is_gcc_lt_4_3
;
7800 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
7801 char **name
, char **comp_dir
)
7803 struct attribute
*attr
;
7808 /* Find the filename. Do not use dwarf2_name here, since the filename
7809 is not a source language identifier. */
7810 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7813 *name
= DW_STRING (attr
);
7816 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
7818 *comp_dir
= DW_STRING (attr
);
7819 else if (producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
7820 && IS_ABSOLUTE_PATH (*name
))
7822 *comp_dir
= ldirname (*name
);
7823 if (*comp_dir
!= NULL
)
7824 make_cleanup (xfree
, *comp_dir
);
7826 if (*comp_dir
!= NULL
)
7828 /* Irix 6.2 native cc prepends <machine>.: to the compilation
7829 directory, get rid of it. */
7830 char *cp
= strchr (*comp_dir
, ':');
7832 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
7837 *name
= "<unknown>";
7840 /* Handle DW_AT_stmt_list for a compilation unit.
7841 DIE is the DW_TAG_compile_unit die for CU.
7842 COMP_DIR is the compilation directory.
7843 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
7846 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
7847 const char *comp_dir
)
7849 struct attribute
*attr
;
7851 gdb_assert (! cu
->per_cu
->is_debug_types
);
7853 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
7856 unsigned int line_offset
= DW_UNSND (attr
);
7857 struct line_header
*line_header
7858 = dwarf_decode_line_header (line_offset
, cu
);
7862 cu
->line_header
= line_header
;
7863 make_cleanup (free_cu_line_header
, cu
);
7864 dwarf_decode_lines (line_header
, comp_dir
, cu
, NULL
, 1);
7869 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
7872 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7874 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7875 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
7876 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
7877 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
7878 struct attribute
*attr
;
7880 char *comp_dir
= NULL
;
7881 struct die_info
*child_die
;
7882 bfd
*abfd
= objfile
->obfd
;
7885 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7887 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
7889 /* If we didn't find a lowpc, set it to highpc to avoid complaints
7890 from finish_block. */
7891 if (lowpc
== ((CORE_ADDR
) -1))
7896 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
7898 prepare_one_comp_unit (cu
, die
, cu
->language
);
7900 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
7901 standardised yet. As a workaround for the language detection we fall
7902 back to the DW_AT_producer string. */
7903 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
7904 cu
->language
= language_opencl
;
7906 /* Similar hack for Go. */
7907 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
7908 set_cu_language (DW_LANG_Go
, cu
);
7910 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
7912 /* Decode line number information if present. We do this before
7913 processing child DIEs, so that the line header table is available
7914 for DW_AT_decl_file. */
7915 handle_DW_AT_stmt_list (die
, cu
, comp_dir
);
7917 /* Process all dies in compilation unit. */
7918 if (die
->child
!= NULL
)
7920 child_die
= die
->child
;
7921 while (child_die
&& child_die
->tag
)
7923 process_die (child_die
, cu
);
7924 child_die
= sibling_die (child_die
);
7928 /* Decode macro information, if present. Dwarf 2 macro information
7929 refers to information in the line number info statement program
7930 header, so we can only read it if we've read the header
7932 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
7933 if (attr
&& cu
->line_header
)
7935 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
7936 complaint (&symfile_complaints
,
7937 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
7939 dwarf_decode_macros (cu
, DW_UNSND (attr
), comp_dir
, 1);
7943 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
7944 if (attr
&& cu
->line_header
)
7946 unsigned int macro_offset
= DW_UNSND (attr
);
7948 dwarf_decode_macros (cu
, macro_offset
, comp_dir
, 0);
7952 do_cleanups (back_to
);
7955 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
7956 Create the set of symtabs used by this TU, or if this TU is sharing
7957 symtabs with another TU and the symtabs have already been created
7958 then restore those symtabs in the line header.
7959 We don't need the pc/line-number mapping for type units. */
7962 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
7964 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7965 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7966 struct type_unit_group
*tu_group
;
7968 struct line_header
*lh
;
7969 struct attribute
*attr
;
7970 unsigned int i
, line_offset
;
7972 gdb_assert (per_cu
->is_debug_types
);
7974 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
7976 /* If we're using .gdb_index (includes -readnow) then
7977 per_cu->s.type_unit_group may not have been set up yet. */
7978 if (per_cu
->s
.type_unit_group
== NULL
)
7979 per_cu
->s
.type_unit_group
= get_type_unit_group (cu
, attr
);
7980 tu_group
= per_cu
->s
.type_unit_group
;
7982 /* If we've already processed this stmt_list there's no real need to
7983 do it again, we could fake it and just recreate the part we need
7984 (file name,index -> symtab mapping). If data shows this optimization
7985 is useful we can do it then. */
7986 first_time
= tu_group
->primary_symtab
== NULL
;
7988 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
7993 line_offset
= DW_UNSND (attr
);
7994 lh
= dwarf_decode_line_header (line_offset
, cu
);
7999 dwarf2_start_symtab (cu
, "", NULL
, 0);
8002 gdb_assert (tu_group
->symtabs
== NULL
);
8005 /* Note: The primary symtab will get allocated at the end. */
8009 cu
->line_header
= lh
;
8010 make_cleanup (free_cu_line_header
, cu
);
8014 dwarf2_start_symtab (cu
, "", NULL
, 0);
8016 tu_group
->num_symtabs
= lh
->num_file_names
;
8017 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
8019 for (i
= 0; i
< lh
->num_file_names
; ++i
)
8022 struct file_entry
*fe
= &lh
->file_names
[i
];
8025 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8026 dwarf2_start_subfile (fe
->name
, dir
, NULL
);
8028 /* Note: We don't have to watch for the main subfile here, type units
8029 don't have DW_AT_name. */
8031 if (current_subfile
->symtab
== NULL
)
8033 /* NOTE: start_subfile will recognize when it's been passed
8034 a file it has already seen. So we can't assume there's a
8035 simple mapping from lh->file_names to subfiles,
8036 lh->file_names may contain dups. */
8037 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8041 fe
->symtab
= current_subfile
->symtab
;
8042 tu_group
->symtabs
[i
] = fe
->symtab
;
8049 for (i
= 0; i
< lh
->num_file_names
; ++i
)
8051 struct file_entry
*fe
= &lh
->file_names
[i
];
8053 fe
->symtab
= tu_group
->symtabs
[i
];
8057 /* The main symtab is allocated last. Type units don't have DW_AT_name
8058 so they don't have a "real" (so to speak) symtab anyway.
8059 There is later code that will assign the main symtab to all symbols
8060 that don't have one. We need to handle the case of a symbol with a
8061 missing symtab (DW_AT_decl_file) anyway. */
8064 /* Process DW_TAG_type_unit.
8065 For TUs we want to skip the first top level sibling if it's not the
8066 actual type being defined by this TU. In this case the first top
8067 level sibling is there to provide context only. */
8070 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8072 struct die_info
*child_die
;
8074 prepare_one_comp_unit (cu
, die
, language_minimal
);
8076 /* Initialize (or reinitialize) the machinery for building symtabs.
8077 We do this before processing child DIEs, so that the line header table
8078 is available for DW_AT_decl_file. */
8079 setup_type_unit_groups (die
, cu
);
8081 if (die
->child
!= NULL
)
8083 child_die
= die
->child
;
8084 while (child_die
&& child_die
->tag
)
8086 process_die (child_die
, cu
);
8087 child_die
= sibling_die (child_die
);
8094 http://gcc.gnu.org/wiki/DebugFission
8095 http://gcc.gnu.org/wiki/DebugFissionDWP
8097 To simplify handling of both DWO files ("object" files with the DWARF info)
8098 and DWP files (a file with the DWOs packaged up into one file), we treat
8099 DWP files as having a collection of virtual DWO files. */
8102 hash_dwo_file (const void *item
)
8104 const struct dwo_file
*dwo_file
= item
;
8106 return htab_hash_string (dwo_file
->name
);
8110 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
8112 const struct dwo_file
*lhs
= item_lhs
;
8113 const struct dwo_file
*rhs
= item_rhs
;
8115 return strcmp (lhs
->name
, rhs
->name
) == 0;
8118 /* Allocate a hash table for DWO files. */
8121 allocate_dwo_file_hash_table (void)
8123 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8125 return htab_create_alloc_ex (41,
8129 &objfile
->objfile_obstack
,
8130 hashtab_obstack_allocate
,
8131 dummy_obstack_deallocate
);
8134 /* Lookup DWO file DWO_NAME. */
8137 lookup_dwo_file_slot (const char *dwo_name
)
8139 struct dwo_file find_entry
;
8142 if (dwarf2_per_objfile
->dwo_files
== NULL
)
8143 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
8145 memset (&find_entry
, 0, sizeof (find_entry
));
8146 find_entry
.name
= dwo_name
;
8147 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
8153 hash_dwo_unit (const void *item
)
8155 const struct dwo_unit
*dwo_unit
= item
;
8157 /* This drops the top 32 bits of the id, but is ok for a hash. */
8158 return dwo_unit
->signature
;
8162 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
8164 const struct dwo_unit
*lhs
= item_lhs
;
8165 const struct dwo_unit
*rhs
= item_rhs
;
8167 /* The signature is assumed to be unique within the DWO file.
8168 So while object file CU dwo_id's always have the value zero,
8169 that's OK, assuming each object file DWO file has only one CU,
8170 and that's the rule for now. */
8171 return lhs
->signature
== rhs
->signature
;
8174 /* Allocate a hash table for DWO CUs,TUs.
8175 There is one of these tables for each of CUs,TUs for each DWO file. */
8178 allocate_dwo_unit_table (struct objfile
*objfile
)
8180 /* Start out with a pretty small number.
8181 Generally DWO files contain only one CU and maybe some TUs. */
8182 return htab_create_alloc_ex (3,
8186 &objfile
->objfile_obstack
,
8187 hashtab_obstack_allocate
,
8188 dummy_obstack_deallocate
);
8191 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
8193 struct create_dwo_info_table_data
8195 struct dwo_file
*dwo_file
;
8199 /* die_reader_func for create_dwo_debug_info_hash_table. */
8202 create_dwo_debug_info_hash_table_reader (const struct die_reader_specs
*reader
,
8204 struct die_info
*comp_unit_die
,
8208 struct dwarf2_cu
*cu
= reader
->cu
;
8209 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8210 sect_offset offset
= cu
->per_cu
->offset
;
8211 struct dwarf2_section_info
*section
= cu
->per_cu
->info_or_types_section
;
8212 struct create_dwo_info_table_data
*data
= datap
;
8213 struct dwo_file
*dwo_file
= data
->dwo_file
;
8214 htab_t cu_htab
= data
->cu_htab
;
8216 struct attribute
*attr
;
8217 struct dwo_unit
*dwo_unit
;
8219 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
8222 error (_("Dwarf Error: debug entry at offset 0x%x is missing"
8223 " its dwo_id [in module %s]"),
8224 offset
.sect_off
, dwo_file
->name
);
8228 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
8229 dwo_unit
->dwo_file
= dwo_file
;
8230 dwo_unit
->signature
= DW_UNSND (attr
);
8231 dwo_unit
->info_or_types_section
= section
;
8232 dwo_unit
->offset
= offset
;
8233 dwo_unit
->length
= cu
->per_cu
->length
;
8235 slot
= htab_find_slot (cu_htab
, dwo_unit
, INSERT
);
8236 gdb_assert (slot
!= NULL
);
8239 const struct dwo_unit
*dup_dwo_unit
= *slot
;
8241 complaint (&symfile_complaints
,
8242 _("debug entry at offset 0x%x is duplicate to the entry at"
8243 " offset 0x%x, dwo_id 0x%s [in module %s]"),
8244 offset
.sect_off
, dup_dwo_unit
->offset
.sect_off
,
8245 phex (dwo_unit
->signature
, sizeof (dwo_unit
->signature
)),
8251 if (dwarf2_read_debug
)
8252 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id 0x%s\n",
8254 phex (dwo_unit
->signature
,
8255 sizeof (dwo_unit
->signature
)));
8258 /* Create a hash table to map DWO IDs to their CU entry in
8259 .debug_info.dwo in DWO_FILE.
8260 Note: This function processes DWO files only, not DWP files. */
8263 create_dwo_debug_info_hash_table (struct dwo_file
*dwo_file
)
8265 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8266 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
8269 gdb_byte
*info_ptr
, *end_ptr
;
8270 struct create_dwo_info_table_data create_dwo_info_table_data
;
8272 dwarf2_read_section (objfile
, section
);
8273 info_ptr
= section
->buffer
;
8275 if (info_ptr
== NULL
)
8278 /* We can't set abfd until now because the section may be empty or
8279 not present, in which case section->asection will be NULL. */
8280 abfd
= section
->asection
->owner
;
8282 if (dwarf2_read_debug
)
8283 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_info.dwo for %s:\n",
8284 bfd_get_filename (abfd
));
8286 cu_htab
= allocate_dwo_unit_table (objfile
);
8288 create_dwo_info_table_data
.dwo_file
= dwo_file
;
8289 create_dwo_info_table_data
.cu_htab
= cu_htab
;
8291 end_ptr
= info_ptr
+ section
->size
;
8292 while (info_ptr
< end_ptr
)
8294 struct dwarf2_per_cu_data per_cu
;
8296 memset (&per_cu
, 0, sizeof (per_cu
));
8297 per_cu
.objfile
= objfile
;
8298 per_cu
.is_debug_types
= 0;
8299 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
8300 per_cu
.info_or_types_section
= section
;
8302 init_cutu_and_read_dies_no_follow (&per_cu
,
8303 &dwo_file
->sections
.abbrev
,
8305 create_dwo_debug_info_hash_table_reader
,
8306 &create_dwo_info_table_data
);
8308 info_ptr
+= per_cu
.length
;
8314 /* DWP file .debug_{cu,tu}_index section format:
8315 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
8317 Both index sections have the same format, and serve to map a 64-bit
8318 signature to a set of section numbers. Each section begins with a header,
8319 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
8320 indexes, and a pool of 32-bit section numbers. The index sections will be
8321 aligned at 8-byte boundaries in the file.
8323 The index section header contains two unsigned 32-bit values (using the
8324 byte order of the application binary):
8326 N, the number of compilation units or type units in the index
8327 M, the number of slots in the hash table
8329 (We assume that N and M will not exceed 2^32 - 1.)
8331 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
8333 The hash table begins at offset 8 in the section, and consists of an array
8334 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
8335 order of the application binary). Unused slots in the hash table are 0.
8336 (We rely on the extreme unlikeliness of a signature being exactly 0.)
8338 The parallel table begins immediately after the hash table
8339 (at offset 8 + 8 * M from the beginning of the section), and consists of an
8340 array of 32-bit indexes (using the byte order of the application binary),
8341 corresponding 1-1 with slots in the hash table. Each entry in the parallel
8342 table contains a 32-bit index into the pool of section numbers. For unused
8343 hash table slots, the corresponding entry in the parallel table will be 0.
8345 Given a 64-bit compilation unit signature or a type signature S, an entry
8346 in the hash table is located as follows:
8348 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
8349 the low-order k bits all set to 1.
8351 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
8353 3) If the hash table entry at index H matches the signature, use that
8354 entry. If the hash table entry at index H is unused (all zeroes),
8355 terminate the search: the signature is not present in the table.
8357 4) Let H = (H + H') modulo M. Repeat at Step 3.
8359 Because M > N and H' and M are relatively prime, the search is guaranteed
8360 to stop at an unused slot or find the match.
8362 The pool of section numbers begins immediately following the hash table
8363 (at offset 8 + 12 * M from the beginning of the section). The pool of
8364 section numbers consists of an array of 32-bit words (using the byte order
8365 of the application binary). Each item in the array is indexed starting
8366 from 0. The hash table entry provides the index of the first section
8367 number in the set. Additional section numbers in the set follow, and the
8368 set is terminated by a 0 entry (section number 0 is not used in ELF).
8370 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
8371 section must be the first entry in the set, and the .debug_abbrev.dwo must
8372 be the second entry. Other members of the set may follow in any order. */
8374 /* Create a hash table to map DWO IDs to their CU/TU entry in
8375 .debug_{info,types}.dwo in DWP_FILE.
8376 Returns NULL if there isn't one.
8377 Note: This function processes DWP files only, not DWO files. */
8379 static struct dwp_hash_table
*
8380 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
8382 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8383 bfd
*dbfd
= dwp_file
->dbfd
;
8384 char *index_ptr
, *index_end
;
8385 struct dwarf2_section_info
*index
;
8386 uint32_t version
, nr_units
, nr_slots
;
8387 struct dwp_hash_table
*htab
;
8390 index
= &dwp_file
->sections
.tu_index
;
8392 index
= &dwp_file
->sections
.cu_index
;
8394 if (dwarf2_section_empty_p (index
))
8396 dwarf2_read_section (objfile
, index
);
8398 index_ptr
= index
->buffer
;
8399 index_end
= index_ptr
+ index
->size
;
8401 version
= read_4_bytes (dbfd
, index_ptr
);
8402 index_ptr
+= 8; /* Skip the unused word. */
8403 nr_units
= read_4_bytes (dbfd
, index_ptr
);
8405 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
8410 error (_("Dwarf Error: unsupported DWP file version (%u)"
8412 version
, dwp_file
->name
);
8414 if (nr_slots
!= (nr_slots
& -nr_slots
))
8416 error (_("Dwarf Error: number of slots in DWP hash table (%u)"
8417 " is not power of 2 [in module %s]"),
8418 nr_slots
, dwp_file
->name
);
8421 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
8422 htab
->nr_units
= nr_units
;
8423 htab
->nr_slots
= nr_slots
;
8424 htab
->hash_table
= index_ptr
;
8425 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
8426 htab
->section_pool
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
8431 /* Update SECTIONS with the data from SECTP.
8433 This function is like the other "locate" section routines that are
8434 passed to bfd_map_over_sections, but in this context the sections to
8435 read comes from the DWP hash table, not the full ELF section table.
8437 The result is non-zero for success, or zero if an error was found. */
8440 locate_virtual_dwo_sections (asection
*sectp
,
8441 struct virtual_dwo_sections
*sections
)
8443 const struct dwop_section_names
*names
= &dwop_section_names
;
8445 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
8447 /* There can be only one. */
8448 if (sections
->abbrev
.asection
!= NULL
)
8450 sections
->abbrev
.asection
= sectp
;
8451 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
8453 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
8454 || section_is_p (sectp
->name
, &names
->types_dwo
))
8456 /* There can be only one. */
8457 if (sections
->info_or_types
.asection
!= NULL
)
8459 sections
->info_or_types
.asection
= sectp
;
8460 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
8462 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
8464 /* There can be only one. */
8465 if (sections
->line
.asection
!= NULL
)
8467 sections
->line
.asection
= sectp
;
8468 sections
->line
.size
= bfd_get_section_size (sectp
);
8470 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
8472 /* There can be only one. */
8473 if (sections
->loc
.asection
!= NULL
)
8475 sections
->loc
.asection
= sectp
;
8476 sections
->loc
.size
= bfd_get_section_size (sectp
);
8478 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
8480 /* There can be only one. */
8481 if (sections
->macinfo
.asection
!= NULL
)
8483 sections
->macinfo
.asection
= sectp
;
8484 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
8486 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
8488 /* There can be only one. */
8489 if (sections
->macro
.asection
!= NULL
)
8491 sections
->macro
.asection
= sectp
;
8492 sections
->macro
.size
= bfd_get_section_size (sectp
);
8494 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
8496 /* There can be only one. */
8497 if (sections
->str_offsets
.asection
!= NULL
)
8499 sections
->str_offsets
.asection
= sectp
;
8500 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
8504 /* No other kind of section is valid. */
8511 /* Create a dwo_unit object for the DWO with signature SIGNATURE.
8512 HTAB is the hash table from the DWP file.
8513 SECTION_INDEX is the index of the DWO in HTAB. */
8515 static struct dwo_unit
*
8516 create_dwo_in_dwp (struct dwp_file
*dwp_file
,
8517 const struct dwp_hash_table
*htab
,
8518 uint32_t section_index
,
8519 ULONGEST signature
, int is_debug_types
)
8521 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8522 bfd
*dbfd
= dwp_file
->dbfd
;
8523 const char *kind
= is_debug_types
? "TU" : "CU";
8524 struct dwo_file
*dwo_file
;
8525 struct dwo_unit
*dwo_unit
;
8526 struct virtual_dwo_sections sections
;
8527 void **dwo_file_slot
;
8528 char *virtual_dwo_name
;
8529 struct dwarf2_section_info
*cutu
;
8530 struct cleanup
*cleanups
;
8533 if (dwarf2_read_debug
)
8535 fprintf_unfiltered (gdb_stdlog
, "Reading %s %u/0x%s in DWP file: %s\n",
8537 section_index
, phex (signature
, sizeof (signature
)),
8541 /* Fetch the sections of this DWO.
8542 Put a limit on the number of sections we look for so that bad data
8543 doesn't cause us to loop forever. */
8545 #define MAX_NR_DWO_SECTIONS \
8546 (1 /* .debug_info or .debug_types */ \
8547 + 1 /* .debug_abbrev */ \
8548 + 1 /* .debug_line */ \
8549 + 1 /* .debug_loc */ \
8550 + 1 /* .debug_str_offsets */ \
8551 + 1 /* .debug_macro */ \
8552 + 1 /* .debug_macinfo */ \
8553 + 1 /* trailing zero */)
8555 memset (§ions
, 0, sizeof (sections
));
8556 cleanups
= make_cleanup (null_cleanup
, 0);
8558 for (i
= 0; i
< MAX_NR_DWO_SECTIONS
; ++i
)
8561 uint32_t section_nr
=
8564 + (section_index
+ i
) * sizeof (uint32_t));
8566 if (section_nr
== 0)
8568 if (section_nr
>= dwp_file
->num_sections
)
8570 error (_("Dwarf Error: bad DWP hash table, section number too large"
8575 sectp
= dwp_file
->elf_sections
[section_nr
];
8576 if (! locate_virtual_dwo_sections (sectp
, §ions
))
8578 error (_("Dwarf Error: bad DWP hash table, invalid section found"
8585 || sections
.info_or_types
.asection
== NULL
8586 || sections
.abbrev
.asection
== NULL
)
8588 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
8592 if (i
== MAX_NR_DWO_SECTIONS
)
8594 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
8599 /* It's easier for the rest of the code if we fake a struct dwo_file and
8600 have dwo_unit "live" in that. At least for now.
8602 The DWP file can be made up of a random collection of CUs and TUs.
8603 However, for each CU + set of TUs that came from the same original DWO
8604 file, we want to combine them back into a virtual DWO file to save space
8605 (fewer struct dwo_file objects to allocated). Remember that for really
8606 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
8609 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
8610 sections
.abbrev
.asection
? sections
.abbrev
.asection
->id
: 0,
8611 sections
.line
.asection
? sections
.line
.asection
->id
: 0,
8612 sections
.loc
.asection
? sections
.loc
.asection
->id
: 0,
8613 (sections
.str_offsets
.asection
8614 ? sections
.str_offsets
.asection
->id
8616 make_cleanup (xfree
, virtual_dwo_name
);
8617 /* Can we use an existing virtual DWO file? */
8618 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
);
8619 /* Create one if necessary. */
8620 if (*dwo_file_slot
== NULL
)
8622 if (dwarf2_read_debug
)
8624 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
8627 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
8628 dwo_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
8630 strlen (virtual_dwo_name
));
8631 dwo_file
->sections
.abbrev
= sections
.abbrev
;
8632 dwo_file
->sections
.line
= sections
.line
;
8633 dwo_file
->sections
.loc
= sections
.loc
;
8634 dwo_file
->sections
.macinfo
= sections
.macinfo
;
8635 dwo_file
->sections
.macro
= sections
.macro
;
8636 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
8637 /* The "str" section is global to the entire DWP file. */
8638 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
8639 /* The info or types section is assigned later to dwo_unit,
8640 there's no need to record it in dwo_file.
8641 Also, we can't simply record type sections in dwo_file because
8642 we record a pointer into the vector in dwo_unit. As we collect more
8643 types we'll grow the vector and eventually have to reallocate space
8644 for it, invalidating all the pointers into the current copy. */
8645 *dwo_file_slot
= dwo_file
;
8649 if (dwarf2_read_debug
)
8651 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
8654 dwo_file
= *dwo_file_slot
;
8656 do_cleanups (cleanups
);
8658 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
8659 dwo_unit
->dwo_file
= dwo_file
;
8660 dwo_unit
->signature
= signature
;
8661 dwo_unit
->info_or_types_section
=
8662 obstack_alloc (&objfile
->objfile_obstack
,
8663 sizeof (struct dwarf2_section_info
));
8664 *dwo_unit
->info_or_types_section
= sections
.info_or_types
;
8665 /* offset, length, type_offset_in_tu are set later. */
8670 /* Lookup the DWO with SIGNATURE in DWP_FILE. */
8672 static struct dwo_unit
*
8673 lookup_dwo_in_dwp (struct dwp_file
*dwp_file
,
8674 const struct dwp_hash_table
*htab
,
8675 ULONGEST signature
, int is_debug_types
)
8677 bfd
*dbfd
= dwp_file
->dbfd
;
8678 uint32_t mask
= htab
->nr_slots
- 1;
8679 uint32_t hash
= signature
& mask
;
8680 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
8683 struct dwo_unit find_dwo_cu
, *dwo_cu
;
8685 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
8686 find_dwo_cu
.signature
= signature
;
8687 slot
= htab_find_slot (dwp_file
->loaded_cutus
, &find_dwo_cu
, INSERT
);
8692 /* Use a for loop so that we don't loop forever on bad debug info. */
8693 for (i
= 0; i
< htab
->nr_slots
; ++i
)
8695 ULONGEST signature_in_table
;
8697 signature_in_table
=
8698 read_8_bytes (dbfd
, htab
->hash_table
+ hash
* sizeof (uint64_t));
8699 if (signature_in_table
== signature
)
8701 uint32_t section_index
=
8702 read_4_bytes (dbfd
, htab
->unit_table
+ hash
* sizeof (uint32_t));
8704 *slot
= create_dwo_in_dwp (dwp_file
, htab
, section_index
,
8705 signature
, is_debug_types
);
8708 if (signature_in_table
== 0)
8710 hash
= (hash
+ hash2
) & mask
;
8713 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
8718 /* Subroutine of open_dwop_file to simplify it.
8719 Open the file specified by FILE_NAME and hand it off to BFD for
8720 preliminary analysis. Return a newly initialized bfd *, which
8721 includes a canonicalized copy of FILE_NAME.
8722 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
8723 In case of trouble, return NULL.
8724 NOTE: This function is derived from symfile_bfd_open. */
8727 try_open_dwop_file (const char *file_name
, int is_dwp
)
8731 char *absolute_name
;
8733 flags
= OPF_TRY_CWD_FIRST
;
8735 flags
|= OPF_SEARCH_IN_PATH
;
8736 desc
= openp (debug_file_directory
, flags
, file_name
,
8737 O_RDONLY
| O_BINARY
, &absolute_name
);
8741 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
8744 xfree (absolute_name
);
8747 xfree (absolute_name
);
8748 bfd_set_cacheable (sym_bfd
, 1);
8750 if (!bfd_check_format (sym_bfd
, bfd_object
))
8752 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
8759 /* Try to open DWO/DWP file FILE_NAME.
8760 COMP_DIR is the DW_AT_comp_dir attribute.
8761 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
8762 The result is the bfd handle of the file.
8763 If there is a problem finding or opening the file, return NULL.
8764 Upon success, the canonicalized path of the file is stored in the bfd,
8765 same as symfile_bfd_open. */
8768 open_dwop_file (const char *file_name
, const char *comp_dir
, int is_dwp
)
8772 if (IS_ABSOLUTE_PATH (file_name
))
8773 return try_open_dwop_file (file_name
, is_dwp
);
8775 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
8777 if (comp_dir
!= NULL
)
8779 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
8781 /* NOTE: If comp_dir is a relative path, this will also try the
8782 search path, which seems useful. */
8783 abfd
= try_open_dwop_file (path_to_try
, is_dwp
);
8784 xfree (path_to_try
);
8789 /* That didn't work, try debug-file-directory, which, despite its name,
8790 is a list of paths. */
8792 if (*debug_file_directory
== '\0')
8795 return try_open_dwop_file (file_name
, is_dwp
);
8798 /* This function is mapped across the sections and remembers the offset and
8799 size of each of the DWO debugging sections we are interested in. */
8802 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
8804 struct dwo_sections
*dwo_sections
= dwo_sections_ptr
;
8805 const struct dwop_section_names
*names
= &dwop_section_names
;
8807 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
8809 dwo_sections
->abbrev
.asection
= sectp
;
8810 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
8812 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
8814 dwo_sections
->info
.asection
= sectp
;
8815 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
8817 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
8819 dwo_sections
->line
.asection
= sectp
;
8820 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
8822 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
8824 dwo_sections
->loc
.asection
= sectp
;
8825 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
8827 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
8829 dwo_sections
->macinfo
.asection
= sectp
;
8830 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
8832 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
8834 dwo_sections
->macro
.asection
= sectp
;
8835 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
8837 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
8839 dwo_sections
->str
.asection
= sectp
;
8840 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
8842 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
8844 dwo_sections
->str_offsets
.asection
= sectp
;
8845 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
8847 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
8849 struct dwarf2_section_info type_section
;
8851 memset (&type_section
, 0, sizeof (type_section
));
8852 type_section
.asection
= sectp
;
8853 type_section
.size
= bfd_get_section_size (sectp
);
8854 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
8859 /* Initialize the use of the DWO file specified by DWO_NAME.
8860 The result is NULL if DWO_NAME can't be found. */
8862 static struct dwo_file
*
8863 open_and_init_dwo_file (const char *dwo_name
, const char *comp_dir
)
8865 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8866 struct dwo_file
*dwo_file
;
8868 struct cleanup
*cleanups
;
8870 dbfd
= open_dwop_file (dwo_name
, comp_dir
, 0);
8873 if (dwarf2_read_debug
)
8874 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
8877 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
8878 dwo_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
8879 dwo_name
, strlen (dwo_name
));
8880 dwo_file
->dbfd
= dbfd
;
8882 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
8884 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
8886 dwo_file
->cus
= create_dwo_debug_info_hash_table (dwo_file
);
8888 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
8889 dwo_file
->sections
.types
);
8891 discard_cleanups (cleanups
);
8893 if (dwarf2_read_debug
)
8894 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
8899 /* This function is mapped across the sections and remembers the offset and
8900 size of each of the DWP debugging sections we are interested in. */
8903 dwarf2_locate_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
8905 struct dwp_file
*dwp_file
= dwp_file_ptr
;
8906 const struct dwop_section_names
*names
= &dwop_section_names
;
8907 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
8909 /* Record the ELF section number for later lookup: this is what the
8910 .debug_cu_index,.debug_tu_index tables use. */
8911 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
8912 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
8914 /* Look for specific sections that we need. */
8915 if (section_is_p (sectp
->name
, &names
->str_dwo
))
8917 dwp_file
->sections
.str
.asection
= sectp
;
8918 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
8920 else if (section_is_p (sectp
->name
, &names
->cu_index
))
8922 dwp_file
->sections
.cu_index
.asection
= sectp
;
8923 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
8925 else if (section_is_p (sectp
->name
, &names
->tu_index
))
8927 dwp_file
->sections
.tu_index
.asection
= sectp
;
8928 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
8932 /* Hash function for dwp_file loaded CUs/TUs. */
8935 hash_dwp_loaded_cutus (const void *item
)
8937 const struct dwo_unit
*dwo_unit
= item
;
8939 /* This drops the top 32 bits of the signature, but is ok for a hash. */
8940 return dwo_unit
->signature
;
8943 /* Equality function for dwp_file loaded CUs/TUs. */
8946 eq_dwp_loaded_cutus (const void *a
, const void *b
)
8948 const struct dwo_unit
*dua
= a
;
8949 const struct dwo_unit
*dub
= b
;
8951 return dua
->signature
== dub
->signature
;
8954 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
8957 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
8959 return htab_create_alloc_ex (3,
8960 hash_dwp_loaded_cutus
,
8961 eq_dwp_loaded_cutus
,
8963 &objfile
->objfile_obstack
,
8964 hashtab_obstack_allocate
,
8965 dummy_obstack_deallocate
);
8968 /* Initialize the use of the DWP file for the current objfile.
8969 By convention the name of the DWP file is ${objfile}.dwp.
8970 The result is NULL if it can't be found. */
8972 static struct dwp_file
*
8973 open_and_init_dwp_file (const char *comp_dir
)
8975 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8976 struct dwp_file
*dwp_file
;
8979 struct cleanup
*cleanups
;
8981 dwp_name
= xstrprintf ("%s.dwp", dwarf2_per_objfile
->objfile
->name
);
8982 cleanups
= make_cleanup (xfree
, dwp_name
);
8984 dbfd
= open_dwop_file (dwp_name
, comp_dir
, 1);
8987 if (dwarf2_read_debug
)
8988 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
8989 do_cleanups (cleanups
);
8992 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
8993 dwp_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
8994 dwp_name
, strlen (dwp_name
));
8995 dwp_file
->dbfd
= dbfd
;
8996 do_cleanups (cleanups
);
8998 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwp_file
);
9000 /* +1: section 0 is unused */
9001 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
9002 dwp_file
->elf_sections
=
9003 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
9004 dwp_file
->num_sections
, asection
*);
9006 bfd_map_over_sections (dbfd
, dwarf2_locate_dwp_sections
, dwp_file
);
9008 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
9010 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
9012 dwp_file
->loaded_cutus
= allocate_dwp_loaded_cutus_table (objfile
);
9014 discard_cleanups (cleanups
);
9016 if (dwarf2_read_debug
)
9018 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
9019 fprintf_unfiltered (gdb_stdlog
,
9020 " %u CUs, %u TUs\n",
9021 dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0,
9022 dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0);
9028 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
9029 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
9030 or in the DWP file for the objfile, referenced by THIS_UNIT.
9031 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
9032 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
9034 This is called, for example, when wanting to read a variable with a
9035 complex location. Therefore we don't want to do file i/o for every call.
9036 Therefore we don't want to look for a DWO file on every call.
9037 Therefore we first see if we've already seen SIGNATURE in a DWP file,
9038 then we check if we've already seen DWO_NAME, and only THEN do we check
9041 The result is a pointer to the dwo_unit object or NULL if we didn't find it
9042 (dwo_id mismatch or couldn't find the DWO/DWP file). */
9044 static struct dwo_unit
*
9045 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
9046 const char *dwo_name
, const char *comp_dir
,
9047 ULONGEST signature
, int is_debug_types
)
9049 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9050 const char *kind
= is_debug_types
? "TU" : "CU";
9051 void **dwo_file_slot
;
9052 struct dwo_file
*dwo_file
;
9053 struct dwp_file
*dwp_file
;
9055 /* Have we already read SIGNATURE from a DWP file? */
9057 if (! dwarf2_per_objfile
->dwp_checked
)
9059 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file (comp_dir
);
9060 dwarf2_per_objfile
->dwp_checked
= 1;
9062 dwp_file
= dwarf2_per_objfile
->dwp_file
;
9064 if (dwp_file
!= NULL
)
9066 const struct dwp_hash_table
*dwp_htab
=
9067 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
9069 if (dwp_htab
!= NULL
)
9071 struct dwo_unit
*dwo_cutu
=
9072 lookup_dwo_in_dwp (dwp_file
, dwp_htab
, signature
, is_debug_types
);
9074 if (dwo_cutu
!= NULL
)
9076 if (dwarf2_read_debug
)
9078 fprintf_unfiltered (gdb_stdlog
,
9079 "Virtual DWO %s %s found: @%s\n",
9080 kind
, hex_string (signature
),
9081 host_address_to_string (dwo_cutu
));
9088 /* Have we already seen DWO_NAME? */
9090 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
);
9091 if (*dwo_file_slot
== NULL
)
9093 /* Read in the file and build a table of the DWOs it contains. */
9094 *dwo_file_slot
= open_and_init_dwo_file (dwo_name
, comp_dir
);
9096 /* NOTE: This will be NULL if unable to open the file. */
9097 dwo_file
= *dwo_file_slot
;
9099 if (dwo_file
!= NULL
)
9101 htab_t htab
= is_debug_types
? dwo_file
->tus
: dwo_file
->cus
;
9105 struct dwo_unit find_dwo_cutu
, *dwo_cutu
;
9107 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
9108 find_dwo_cutu
.signature
= signature
;
9109 dwo_cutu
= htab_find (htab
, &find_dwo_cutu
);
9111 if (dwo_cutu
!= NULL
)
9113 if (dwarf2_read_debug
)
9115 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
9116 kind
, dwo_name
, hex_string (signature
),
9117 host_address_to_string (dwo_cutu
));
9124 /* We didn't find it. This could mean a dwo_id mismatch, or
9125 someone deleted the DWO/DWP file, or the search path isn't set up
9126 correctly to find the file. */
9128 if (dwarf2_read_debug
)
9130 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
9131 kind
, dwo_name
, hex_string (signature
));
9134 complaint (&symfile_complaints
,
9135 _("Could not find DWO CU referenced by CU at offset 0x%x"
9137 this_unit
->offset
.sect_off
, objfile
->name
);
9141 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
9142 See lookup_dwo_cutu_unit for details. */
9144 static struct dwo_unit
*
9145 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9146 const char *dwo_name
, const char *comp_dir
,
9149 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
9152 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
9153 See lookup_dwo_cutu_unit for details. */
9155 static struct dwo_unit
*
9156 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
9157 const char *dwo_name
, const char *comp_dir
)
9159 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
9162 /* Free all resources associated with DWO_FILE.
9163 Close the DWO file and munmap the sections.
9164 All memory should be on the objfile obstack. */
9167 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
9170 struct dwarf2_section_info
*section
;
9172 gdb_assert (dwo_file
->dbfd
!= objfile
->obfd
);
9173 gdb_bfd_unref (dwo_file
->dbfd
);
9175 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
9178 /* Wrapper for free_dwo_file for use in cleanups. */
9181 free_dwo_file_cleanup (void *arg
)
9183 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
9184 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9186 free_dwo_file (dwo_file
, objfile
);
9189 /* Traversal function for free_dwo_files. */
9192 free_dwo_file_from_slot (void **slot
, void *info
)
9194 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
9195 struct objfile
*objfile
= (struct objfile
*) info
;
9197 free_dwo_file (dwo_file
, objfile
);
9202 /* Free all resources associated with DWO_FILES. */
9205 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
9207 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
9210 /* Read in various DIEs. */
9212 /* qsort helper for inherit_abstract_dies. */
9215 unsigned_int_compar (const void *ap
, const void *bp
)
9217 unsigned int a
= *(unsigned int *) ap
;
9218 unsigned int b
= *(unsigned int *) bp
;
9220 return (a
> b
) - (b
> a
);
9223 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
9224 Inherit only the children of the DW_AT_abstract_origin DIE not being
9225 already referenced by DW_AT_abstract_origin from the children of the
9229 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
9231 struct die_info
*child_die
;
9232 unsigned die_children_count
;
9233 /* CU offsets which were referenced by children of the current DIE. */
9234 sect_offset
*offsets
;
9235 sect_offset
*offsets_end
, *offsetp
;
9236 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
9237 struct die_info
*origin_die
;
9238 /* Iterator of the ORIGIN_DIE children. */
9239 struct die_info
*origin_child_die
;
9240 struct cleanup
*cleanups
;
9241 struct attribute
*attr
;
9242 struct dwarf2_cu
*origin_cu
;
9243 struct pending
**origin_previous_list_in_scope
;
9245 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
9249 /* Note that following die references may follow to a die in a
9253 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
9255 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
9257 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
9258 origin_cu
->list_in_scope
= cu
->list_in_scope
;
9260 if (die
->tag
!= origin_die
->tag
9261 && !(die
->tag
== DW_TAG_inlined_subroutine
9262 && origin_die
->tag
== DW_TAG_subprogram
))
9263 complaint (&symfile_complaints
,
9264 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
9265 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
9267 child_die
= die
->child
;
9268 die_children_count
= 0;
9269 while (child_die
&& child_die
->tag
)
9271 child_die
= sibling_die (child_die
);
9272 die_children_count
++;
9274 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
9275 cleanups
= make_cleanup (xfree
, offsets
);
9277 offsets_end
= offsets
;
9278 child_die
= die
->child
;
9279 while (child_die
&& child_die
->tag
)
9281 /* For each CHILD_DIE, find the corresponding child of
9282 ORIGIN_DIE. If there is more than one layer of
9283 DW_AT_abstract_origin, follow them all; there shouldn't be,
9284 but GCC versions at least through 4.4 generate this (GCC PR
9286 struct die_info
*child_origin_die
= child_die
;
9287 struct dwarf2_cu
*child_origin_cu
= cu
;
9291 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
9295 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
9299 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
9300 counterpart may exist. */
9301 if (child_origin_die
!= child_die
)
9303 if (child_die
->tag
!= child_origin_die
->tag
9304 && !(child_die
->tag
== DW_TAG_inlined_subroutine
9305 && child_origin_die
->tag
== DW_TAG_subprogram
))
9306 complaint (&symfile_complaints
,
9307 _("Child DIE 0x%x and its abstract origin 0x%x have "
9308 "different tags"), child_die
->offset
.sect_off
,
9309 child_origin_die
->offset
.sect_off
);
9310 if (child_origin_die
->parent
!= origin_die
)
9311 complaint (&symfile_complaints
,
9312 _("Child DIE 0x%x and its abstract origin 0x%x have "
9313 "different parents"), child_die
->offset
.sect_off
,
9314 child_origin_die
->offset
.sect_off
);
9316 *offsets_end
++ = child_origin_die
->offset
;
9318 child_die
= sibling_die (child_die
);
9320 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
9321 unsigned_int_compar
);
9322 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
9323 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
9324 complaint (&symfile_complaints
,
9325 _("Multiple children of DIE 0x%x refer "
9326 "to DIE 0x%x as their abstract origin"),
9327 die
->offset
.sect_off
, offsetp
->sect_off
);
9330 origin_child_die
= origin_die
->child
;
9331 while (origin_child_die
&& origin_child_die
->tag
)
9333 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
9334 while (offsetp
< offsets_end
9335 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
9337 if (offsetp
>= offsets_end
9338 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
9340 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
9341 process_die (origin_child_die
, origin_cu
);
9343 origin_child_die
= sibling_die (origin_child_die
);
9345 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
9347 do_cleanups (cleanups
);
9351 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9353 struct objfile
*objfile
= cu
->objfile
;
9354 struct context_stack
*new;
9357 struct die_info
*child_die
;
9358 struct attribute
*attr
, *call_line
, *call_file
;
9361 struct block
*block
;
9362 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
9363 VEC (symbolp
) *template_args
= NULL
;
9364 struct template_symbol
*templ_func
= NULL
;
9368 /* If we do not have call site information, we can't show the
9369 caller of this inlined function. That's too confusing, so
9370 only use the scope for local variables. */
9371 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
9372 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
9373 if (call_line
== NULL
|| call_file
== NULL
)
9375 read_lexical_block_scope (die
, cu
);
9380 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9382 name
= dwarf2_name (die
, cu
);
9384 /* Ignore functions with missing or empty names. These are actually
9385 illegal according to the DWARF standard. */
9388 complaint (&symfile_complaints
,
9389 _("missing name for subprogram DIE at %d"),
9390 die
->offset
.sect_off
);
9394 /* Ignore functions with missing or invalid low and high pc attributes. */
9395 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
9397 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
9398 if (!attr
|| !DW_UNSND (attr
))
9399 complaint (&symfile_complaints
,
9400 _("cannot get low and high bounds "
9401 "for subprogram DIE at %d"),
9402 die
->offset
.sect_off
);
9409 /* If we have any template arguments, then we must allocate a
9410 different sort of symbol. */
9411 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
9413 if (child_die
->tag
== DW_TAG_template_type_param
9414 || child_die
->tag
== DW_TAG_template_value_param
)
9416 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
9417 struct template_symbol
);
9418 templ_func
->base
.is_cplus_template_function
= 1;
9423 new = push_context (0, lowpc
);
9424 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
9425 (struct symbol
*) templ_func
);
9427 /* If there is a location expression for DW_AT_frame_base, record
9429 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
9431 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
9432 expression is being recorded directly in the function's symbol
9433 and not in a separate frame-base object. I guess this hack is
9434 to avoid adding some sort of frame-base adjunct/annex to the
9435 function's symbol :-(. The problem with doing this is that it
9436 results in a function symbol with a location expression that
9437 has nothing to do with the location of the function, ouch! The
9438 relationship should be: a function's symbol has-a frame base; a
9439 frame-base has-a location expression. */
9440 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
9442 cu
->list_in_scope
= &local_symbols
;
9444 if (die
->child
!= NULL
)
9446 child_die
= die
->child
;
9447 while (child_die
&& child_die
->tag
)
9449 if (child_die
->tag
== DW_TAG_template_type_param
9450 || child_die
->tag
== DW_TAG_template_value_param
)
9452 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
9455 VEC_safe_push (symbolp
, template_args
, arg
);
9458 process_die (child_die
, cu
);
9459 child_die
= sibling_die (child_die
);
9463 inherit_abstract_dies (die
, cu
);
9465 /* If we have a DW_AT_specification, we might need to import using
9466 directives from the context of the specification DIE. See the
9467 comment in determine_prefix. */
9468 if (cu
->language
== language_cplus
9469 && dwarf2_attr (die
, DW_AT_specification
, cu
))
9471 struct dwarf2_cu
*spec_cu
= cu
;
9472 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
9476 child_die
= spec_die
->child
;
9477 while (child_die
&& child_die
->tag
)
9479 if (child_die
->tag
== DW_TAG_imported_module
)
9480 process_die (child_die
, spec_cu
);
9481 child_die
= sibling_die (child_die
);
9484 /* In some cases, GCC generates specification DIEs that
9485 themselves contain DW_AT_specification attributes. */
9486 spec_die
= die_specification (spec_die
, &spec_cu
);
9490 new = pop_context ();
9491 /* Make a block for the local symbols within. */
9492 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
9493 lowpc
, highpc
, objfile
);
9495 /* For C++, set the block's scope. */
9496 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
9497 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
9498 determine_prefix (die
, cu
),
9499 processing_has_namespace_info
);
9501 /* If we have address ranges, record them. */
9502 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
9504 /* Attach template arguments to function. */
9505 if (! VEC_empty (symbolp
, template_args
))
9507 gdb_assert (templ_func
!= NULL
);
9509 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
9510 templ_func
->template_arguments
9511 = obstack_alloc (&objfile
->objfile_obstack
,
9512 (templ_func
->n_template_arguments
9513 * sizeof (struct symbol
*)));
9514 memcpy (templ_func
->template_arguments
,
9515 VEC_address (symbolp
, template_args
),
9516 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
9517 VEC_free (symbolp
, template_args
);
9520 /* In C++, we can have functions nested inside functions (e.g., when
9521 a function declares a class that has methods). This means that
9522 when we finish processing a function scope, we may need to go
9523 back to building a containing block's symbol lists. */
9524 local_symbols
= new->locals
;
9525 using_directives
= new->using_directives
;
9527 /* If we've finished processing a top-level function, subsequent
9528 symbols go in the file symbol list. */
9529 if (outermost_context_p ())
9530 cu
->list_in_scope
= &file_symbols
;
9533 /* Process all the DIES contained within a lexical block scope. Start
9534 a new scope, process the dies, and then close the scope. */
9537 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9539 struct objfile
*objfile
= cu
->objfile
;
9540 struct context_stack
*new;
9541 CORE_ADDR lowpc
, highpc
;
9542 struct die_info
*child_die
;
9545 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9547 /* Ignore blocks with missing or invalid low and high pc attributes. */
9548 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
9549 as multiple lexical blocks? Handling children in a sane way would
9550 be nasty. Might be easier to properly extend generic blocks to
9552 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
9557 push_context (0, lowpc
);
9558 if (die
->child
!= NULL
)
9560 child_die
= die
->child
;
9561 while (child_die
&& child_die
->tag
)
9563 process_die (child_die
, cu
);
9564 child_die
= sibling_die (child_die
);
9567 new = pop_context ();
9569 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
9572 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
9575 /* Note that recording ranges after traversing children, as we
9576 do here, means that recording a parent's ranges entails
9577 walking across all its children's ranges as they appear in
9578 the address map, which is quadratic behavior.
9580 It would be nicer to record the parent's ranges before
9581 traversing its children, simply overriding whatever you find
9582 there. But since we don't even decide whether to create a
9583 block until after we've traversed its children, that's hard
9585 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
9587 local_symbols
= new->locals
;
9588 using_directives
= new->using_directives
;
9591 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
9594 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9596 struct objfile
*objfile
= cu
->objfile
;
9597 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9598 CORE_ADDR pc
, baseaddr
;
9599 struct attribute
*attr
;
9600 struct call_site
*call_site
, call_site_local
;
9603 struct die_info
*child_die
;
9605 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9607 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
9610 complaint (&symfile_complaints
,
9611 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
9612 "DIE 0x%x [in module %s]"),
9613 die
->offset
.sect_off
, objfile
->name
);
9616 pc
= DW_ADDR (attr
) + baseaddr
;
9618 if (cu
->call_site_htab
== NULL
)
9619 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
9620 NULL
, &objfile
->objfile_obstack
,
9621 hashtab_obstack_allocate
, NULL
);
9622 call_site_local
.pc
= pc
;
9623 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
9626 complaint (&symfile_complaints
,
9627 _("Duplicate PC %s for DW_TAG_GNU_call_site "
9628 "DIE 0x%x [in module %s]"),
9629 paddress (gdbarch
, pc
), die
->offset
.sect_off
, objfile
->name
);
9633 /* Count parameters at the caller. */
9636 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
9637 child_die
= sibling_die (child_die
))
9639 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
9641 complaint (&symfile_complaints
,
9642 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
9643 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9644 child_die
->tag
, child_die
->offset
.sect_off
, objfile
->name
);
9651 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
9652 (sizeof (*call_site
)
9653 + (sizeof (*call_site
->parameter
)
9656 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
9659 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
9661 struct die_info
*func_die
;
9663 /* Skip also over DW_TAG_inlined_subroutine. */
9664 for (func_die
= die
->parent
;
9665 func_die
&& func_die
->tag
!= DW_TAG_subprogram
9666 && func_die
->tag
!= DW_TAG_subroutine_type
;
9667 func_die
= func_die
->parent
);
9669 /* DW_AT_GNU_all_call_sites is a superset
9670 of DW_AT_GNU_all_tail_call_sites. */
9672 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
9673 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
9675 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
9676 not complete. But keep CALL_SITE for look ups via call_site_htab,
9677 both the initial caller containing the real return address PC and
9678 the final callee containing the current PC of a chain of tail
9679 calls do not need to have the tail call list complete. But any
9680 function candidate for a virtual tail call frame searched via
9681 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
9682 determined unambiguously. */
9686 struct type
*func_type
= NULL
;
9689 func_type
= get_die_type (func_die
, cu
);
9690 if (func_type
!= NULL
)
9692 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
9694 /* Enlist this call site to the function. */
9695 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
9696 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
9699 complaint (&symfile_complaints
,
9700 _("Cannot find function owning DW_TAG_GNU_call_site "
9701 "DIE 0x%x [in module %s]"),
9702 die
->offset
.sect_off
, objfile
->name
);
9706 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
9708 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
9709 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
9710 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
9711 /* Keep NULL DWARF_BLOCK. */;
9712 else if (attr_form_is_block (attr
))
9714 struct dwarf2_locexpr_baton
*dlbaton
;
9716 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
9717 dlbaton
->data
= DW_BLOCK (attr
)->data
;
9718 dlbaton
->size
= DW_BLOCK (attr
)->size
;
9719 dlbaton
->per_cu
= cu
->per_cu
;
9721 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
9723 else if (is_ref_attr (attr
))
9725 struct dwarf2_cu
*target_cu
= cu
;
9726 struct die_info
*target_die
;
9728 target_die
= follow_die_ref_or_sig (die
, attr
, &target_cu
);
9729 gdb_assert (target_cu
->objfile
== objfile
);
9730 if (die_is_declaration (target_die
, target_cu
))
9732 const char *target_physname
;
9734 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
9735 if (target_physname
== NULL
)
9736 complaint (&symfile_complaints
,
9737 _("DW_AT_GNU_call_site_target target DIE has invalid "
9738 "physname, for referencing DIE 0x%x [in module %s]"),
9739 die
->offset
.sect_off
, objfile
->name
);
9741 SET_FIELD_PHYSNAME (call_site
->target
, (char *) target_physname
);
9747 /* DW_AT_entry_pc should be preferred. */
9748 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
9749 complaint (&symfile_complaints
,
9750 _("DW_AT_GNU_call_site_target target DIE has invalid "
9751 "low pc, for referencing DIE 0x%x [in module %s]"),
9752 die
->offset
.sect_off
, objfile
->name
);
9754 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
+ baseaddr
);
9758 complaint (&symfile_complaints
,
9759 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
9760 "block nor reference, for DIE 0x%x [in module %s]"),
9761 die
->offset
.sect_off
, objfile
->name
);
9763 call_site
->per_cu
= cu
->per_cu
;
9765 for (child_die
= die
->child
;
9766 child_die
&& child_die
->tag
;
9767 child_die
= sibling_die (child_die
))
9769 struct call_site_parameter
*parameter
;
9770 struct attribute
*loc
, *origin
;
9772 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
9774 /* Already printed the complaint above. */
9778 gdb_assert (call_site
->parameter_count
< nparams
);
9779 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
9781 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
9782 specifies DW_TAG_formal_parameter. Value of the data assumed for the
9783 register is contained in DW_AT_GNU_call_site_value. */
9785 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
9786 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
9787 if (loc
== NULL
&& origin
!= NULL
&& is_ref_attr (origin
))
9791 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
9792 offset
= dwarf2_get_ref_die_offset (origin
);
9793 if (!offset_in_cu_p (&cu
->header
, offset
))
9795 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
9796 binding can be done only inside one CU. Such referenced DIE
9797 therefore cannot be even moved to DW_TAG_partial_unit. */
9798 complaint (&symfile_complaints
,
9799 _("DW_AT_abstract_origin offset is not in CU for "
9800 "DW_TAG_GNU_call_site child DIE 0x%x "
9802 child_die
->offset
.sect_off
, objfile
->name
);
9805 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
9806 - cu
->header
.offset
.sect_off
);
9808 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
9810 complaint (&symfile_complaints
,
9811 _("No DW_FORM_block* DW_AT_location for "
9812 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9813 child_die
->offset
.sect_off
, objfile
->name
);
9818 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
9819 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
9820 if (parameter
->u
.dwarf_reg
!= -1)
9821 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
9822 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
9823 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
9824 ¶meter
->u
.fb_offset
))
9825 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
9828 complaint (&symfile_complaints
,
9829 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
9830 "for DW_FORM_block* DW_AT_location is supported for "
9831 "DW_TAG_GNU_call_site child DIE 0x%x "
9833 child_die
->offset
.sect_off
, objfile
->name
);
9838 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
9839 if (!attr_form_is_block (attr
))
9841 complaint (&symfile_complaints
,
9842 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
9843 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9844 child_die
->offset
.sect_off
, objfile
->name
);
9847 parameter
->value
= DW_BLOCK (attr
)->data
;
9848 parameter
->value_size
= DW_BLOCK (attr
)->size
;
9850 /* Parameters are not pre-cleared by memset above. */
9851 parameter
->data_value
= NULL
;
9852 parameter
->data_value_size
= 0;
9853 call_site
->parameter_count
++;
9855 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
9858 if (!attr_form_is_block (attr
))
9859 complaint (&symfile_complaints
,
9860 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
9861 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9862 child_die
->offset
.sect_off
, objfile
->name
);
9865 parameter
->data_value
= DW_BLOCK (attr
)->data
;
9866 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
9872 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
9873 Return 1 if the attributes are present and valid, otherwise, return 0.
9874 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
9877 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
9878 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
9879 struct partial_symtab
*ranges_pst
)
9881 struct objfile
*objfile
= cu
->objfile
;
9882 struct comp_unit_head
*cu_header
= &cu
->header
;
9883 bfd
*obfd
= objfile
->obfd
;
9884 unsigned int addr_size
= cu_header
->addr_size
;
9885 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
9886 /* Base address selection entry. */
9897 found_base
= cu
->base_known
;
9898 base
= cu
->base_address
;
9900 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
9901 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
9903 complaint (&symfile_complaints
,
9904 _("Offset %d out of bounds for DW_AT_ranges attribute"),
9908 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
9910 /* Read in the largest possible address. */
9911 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
9912 if ((marker
& mask
) == mask
)
9914 /* If we found the largest possible address, then
9915 read the base address. */
9916 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
9917 buffer
+= 2 * addr_size
;
9918 offset
+= 2 * addr_size
;
9924 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9928 CORE_ADDR range_beginning
, range_end
;
9930 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
9931 buffer
+= addr_size
;
9932 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
9933 buffer
+= addr_size
;
9934 offset
+= 2 * addr_size
;
9936 /* An end of list marker is a pair of zero addresses. */
9937 if (range_beginning
== 0 && range_end
== 0)
9938 /* Found the end of list entry. */
9941 /* Each base address selection entry is a pair of 2 values.
9942 The first is the largest possible address, the second is
9943 the base address. Check for a base address here. */
9944 if ((range_beginning
& mask
) == mask
)
9946 /* If we found the largest possible address, then
9947 read the base address. */
9948 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
9955 /* We have no valid base address for the ranges
9957 complaint (&symfile_complaints
,
9958 _("Invalid .debug_ranges data (no base address)"));
9962 if (range_beginning
> range_end
)
9964 /* Inverted range entries are invalid. */
9965 complaint (&symfile_complaints
,
9966 _("Invalid .debug_ranges data (inverted range)"));
9970 /* Empty range entries have no effect. */
9971 if (range_beginning
== range_end
)
9974 range_beginning
+= base
;
9977 /* A not-uncommon case of bad debug info.
9978 Don't pollute the addrmap with bad data. */
9979 if (range_beginning
+ baseaddr
== 0
9980 && !dwarf2_per_objfile
->has_section_at_zero
)
9982 complaint (&symfile_complaints
,
9983 _(".debug_ranges entry has start address of zero"
9984 " [in module %s]"), objfile
->name
);
9988 if (ranges_pst
!= NULL
)
9989 addrmap_set_empty (objfile
->psymtabs_addrmap
,
9990 range_beginning
+ baseaddr
,
9991 range_end
- 1 + baseaddr
,
9994 /* FIXME: This is recording everything as a low-high
9995 segment of consecutive addresses. We should have a
9996 data structure for discontiguous block ranges
10000 low
= range_beginning
;
10006 if (range_beginning
< low
)
10007 low
= range_beginning
;
10008 if (range_end
> high
)
10014 /* If the first entry is an end-of-list marker, the range
10015 describes an empty scope, i.e. no instructions. */
10021 *high_return
= high
;
10025 /* Get low and high pc attributes from a die. Return 1 if the attributes
10026 are present and valid, otherwise, return 0. Return -1 if the range is
10027 discontinuous, i.e. derived from DW_AT_ranges information. */
10030 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
10031 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
10032 struct partial_symtab
*pst
)
10034 struct attribute
*attr
;
10035 struct attribute
*attr_high
;
10037 CORE_ADDR high
= 0;
10040 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
10043 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10046 low
= DW_ADDR (attr
);
10047 if (attr_high
->form
== DW_FORM_addr
10048 || attr_high
->form
== DW_FORM_GNU_addr_index
)
10049 high
= DW_ADDR (attr_high
);
10051 high
= low
+ DW_UNSND (attr_high
);
10054 /* Found high w/o low attribute. */
10057 /* Found consecutive range of addresses. */
10062 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
10065 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
10066 We take advantage of the fact that DW_AT_ranges does not appear
10067 in DW_TAG_compile_unit of DWO files. */
10068 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
10069 unsigned int ranges_offset
= (DW_UNSND (attr
)
10070 + (need_ranges_base
10074 /* Value of the DW_AT_ranges attribute is the offset in the
10075 .debug_ranges section. */
10076 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
10078 /* Found discontinuous range of addresses. */
10083 /* read_partial_die has also the strict LOW < HIGH requirement. */
10087 /* When using the GNU linker, .gnu.linkonce. sections are used to
10088 eliminate duplicate copies of functions and vtables and such.
10089 The linker will arbitrarily choose one and discard the others.
10090 The AT_*_pc values for such functions refer to local labels in
10091 these sections. If the section from that file was discarded, the
10092 labels are not in the output, so the relocs get a value of 0.
10093 If this is a discarded function, mark the pc bounds as invalid,
10094 so that GDB will ignore it. */
10095 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
10104 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
10105 its low and high PC addresses. Do nothing if these addresses could not
10106 be determined. Otherwise, set LOWPC to the low address if it is smaller,
10107 and HIGHPC to the high address if greater than HIGHPC. */
10110 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
10111 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
10112 struct dwarf2_cu
*cu
)
10114 CORE_ADDR low
, high
;
10115 struct die_info
*child
= die
->child
;
10117 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
10119 *lowpc
= min (*lowpc
, low
);
10120 *highpc
= max (*highpc
, high
);
10123 /* If the language does not allow nested subprograms (either inside
10124 subprograms or lexical blocks), we're done. */
10125 if (cu
->language
!= language_ada
)
10128 /* Check all the children of the given DIE. If it contains nested
10129 subprograms, then check their pc bounds. Likewise, we need to
10130 check lexical blocks as well, as they may also contain subprogram
10132 while (child
&& child
->tag
)
10134 if (child
->tag
== DW_TAG_subprogram
10135 || child
->tag
== DW_TAG_lexical_block
)
10136 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
10137 child
= sibling_die (child
);
10141 /* Get the low and high pc's represented by the scope DIE, and store
10142 them in *LOWPC and *HIGHPC. If the correct values can't be
10143 determined, set *LOWPC to -1 and *HIGHPC to 0. */
10146 get_scope_pc_bounds (struct die_info
*die
,
10147 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
10148 struct dwarf2_cu
*cu
)
10150 CORE_ADDR best_low
= (CORE_ADDR
) -1;
10151 CORE_ADDR best_high
= (CORE_ADDR
) 0;
10152 CORE_ADDR current_low
, current_high
;
10154 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
10156 best_low
= current_low
;
10157 best_high
= current_high
;
10161 struct die_info
*child
= die
->child
;
10163 while (child
&& child
->tag
)
10165 switch (child
->tag
) {
10166 case DW_TAG_subprogram
:
10167 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
10169 case DW_TAG_namespace
:
10170 case DW_TAG_module
:
10171 /* FIXME: carlton/2004-01-16: Should we do this for
10172 DW_TAG_class_type/DW_TAG_structure_type, too? I think
10173 that current GCC's always emit the DIEs corresponding
10174 to definitions of methods of classes as children of a
10175 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
10176 the DIEs giving the declarations, which could be
10177 anywhere). But I don't see any reason why the
10178 standards says that they have to be there. */
10179 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
10181 if (current_low
!= ((CORE_ADDR
) -1))
10183 best_low
= min (best_low
, current_low
);
10184 best_high
= max (best_high
, current_high
);
10192 child
= sibling_die (child
);
10197 *highpc
= best_high
;
10200 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
10204 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
10205 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
10207 struct objfile
*objfile
= cu
->objfile
;
10208 struct attribute
*attr
;
10209 struct attribute
*attr_high
;
10211 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
10214 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10217 CORE_ADDR low
= DW_ADDR (attr
);
10219 if (attr_high
->form
== DW_FORM_addr
10220 || attr_high
->form
== DW_FORM_GNU_addr_index
)
10221 high
= DW_ADDR (attr_high
);
10223 high
= low
+ DW_UNSND (attr_high
);
10225 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
10229 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
10232 bfd
*obfd
= objfile
->obfd
;
10233 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
10234 We take advantage of the fact that DW_AT_ranges does not appear
10235 in DW_TAG_compile_unit of DWO files. */
10236 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
10238 /* The value of the DW_AT_ranges attribute is the offset of the
10239 address range list in the .debug_ranges section. */
10240 unsigned long offset
= (DW_UNSND (attr
)
10241 + (need_ranges_base
? cu
->ranges_base
: 0));
10242 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
10244 /* For some target architectures, but not others, the
10245 read_address function sign-extends the addresses it returns.
10246 To recognize base address selection entries, we need a
10248 unsigned int addr_size
= cu
->header
.addr_size
;
10249 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
10251 /* The base address, to which the next pair is relative. Note
10252 that this 'base' is a DWARF concept: most entries in a range
10253 list are relative, to reduce the number of relocs against the
10254 debugging information. This is separate from this function's
10255 'baseaddr' argument, which GDB uses to relocate debugging
10256 information from a shared library based on the address at
10257 which the library was loaded. */
10258 CORE_ADDR base
= cu
->base_address
;
10259 int base_known
= cu
->base_known
;
10261 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
10262 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
10264 complaint (&symfile_complaints
,
10265 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
10272 unsigned int bytes_read
;
10273 CORE_ADDR start
, end
;
10275 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
10276 buffer
+= bytes_read
;
10277 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
10278 buffer
+= bytes_read
;
10280 /* Did we find the end of the range list? */
10281 if (start
== 0 && end
== 0)
10284 /* Did we find a base address selection entry? */
10285 else if ((start
& base_select_mask
) == base_select_mask
)
10291 /* We found an ordinary address range. */
10296 complaint (&symfile_complaints
,
10297 _("Invalid .debug_ranges data "
10298 "(no base address)"));
10304 /* Inverted range entries are invalid. */
10305 complaint (&symfile_complaints
,
10306 _("Invalid .debug_ranges data "
10307 "(inverted range)"));
10311 /* Empty range entries have no effect. */
10315 start
+= base
+ baseaddr
;
10316 end
+= base
+ baseaddr
;
10318 /* A not-uncommon case of bad debug info.
10319 Don't pollute the addrmap with bad data. */
10320 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
10322 complaint (&symfile_complaints
,
10323 _(".debug_ranges entry has start address of zero"
10324 " [in module %s]"), objfile
->name
);
10328 record_block_range (block
, start
, end
- 1);
10334 /* Check whether the producer field indicates either of GCC < 4.6, or the
10335 Intel C/C++ compiler, and cache the result in CU. */
10338 check_producer (struct dwarf2_cu
*cu
)
10341 int major
, minor
, release
;
10343 if (cu
->producer
== NULL
)
10345 /* For unknown compilers expect their behavior is DWARF version
10348 GCC started to support .debug_types sections by -gdwarf-4 since
10349 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
10350 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
10351 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
10352 interpreted incorrectly by GDB now - GCC PR debug/48229. */
10354 else if (strncmp (cu
->producer
, "GNU ", strlen ("GNU ")) == 0)
10356 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
10358 cs
= &cu
->producer
[strlen ("GNU ")];
10359 while (*cs
&& !isdigit (*cs
))
10361 if (sscanf (cs
, "%d.%d.%d", &major
, &minor
, &release
) != 3)
10363 /* Not recognized as GCC. */
10367 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
10368 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
10371 else if (strncmp (cu
->producer
, "Intel(R) C", strlen ("Intel(R) C")) == 0)
10372 cu
->producer_is_icc
= 1;
10375 /* For other non-GCC compilers, expect their behavior is DWARF version
10379 cu
->checked_producer
= 1;
10382 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
10383 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
10384 during 4.6.0 experimental. */
10387 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
10389 if (!cu
->checked_producer
)
10390 check_producer (cu
);
10392 return cu
->producer_is_gxx_lt_4_6
;
10395 /* Return the default accessibility type if it is not overriden by
10396 DW_AT_accessibility. */
10398 static enum dwarf_access_attribute
10399 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
10401 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
10403 /* The default DWARF 2 accessibility for members is public, the default
10404 accessibility for inheritance is private. */
10406 if (die
->tag
!= DW_TAG_inheritance
)
10407 return DW_ACCESS_public
;
10409 return DW_ACCESS_private
;
10413 /* DWARF 3+ defines the default accessibility a different way. The same
10414 rules apply now for DW_TAG_inheritance as for the members and it only
10415 depends on the container kind. */
10417 if (die
->parent
->tag
== DW_TAG_class_type
)
10418 return DW_ACCESS_private
;
10420 return DW_ACCESS_public
;
10424 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
10425 offset. If the attribute was not found return 0, otherwise return
10426 1. If it was found but could not properly be handled, set *OFFSET
10430 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
10433 struct attribute
*attr
;
10435 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
10440 /* Note that we do not check for a section offset first here.
10441 This is because DW_AT_data_member_location is new in DWARF 4,
10442 so if we see it, we can assume that a constant form is really
10443 a constant and not a section offset. */
10444 if (attr_form_is_constant (attr
))
10445 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
10446 else if (attr_form_is_section_offset (attr
))
10447 dwarf2_complex_location_expr_complaint ();
10448 else if (attr_form_is_block (attr
))
10449 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
10451 dwarf2_complex_location_expr_complaint ();
10459 /* Add an aggregate field to the field list. */
10462 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
10463 struct dwarf2_cu
*cu
)
10465 struct objfile
*objfile
= cu
->objfile
;
10466 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10467 struct nextfield
*new_field
;
10468 struct attribute
*attr
;
10470 char *fieldname
= "";
10472 /* Allocate a new field list entry and link it in. */
10473 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
10474 make_cleanup (xfree
, new_field
);
10475 memset (new_field
, 0, sizeof (struct nextfield
));
10477 if (die
->tag
== DW_TAG_inheritance
)
10479 new_field
->next
= fip
->baseclasses
;
10480 fip
->baseclasses
= new_field
;
10484 new_field
->next
= fip
->fields
;
10485 fip
->fields
= new_field
;
10489 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
10491 new_field
->accessibility
= DW_UNSND (attr
);
10493 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
10494 if (new_field
->accessibility
!= DW_ACCESS_public
)
10495 fip
->non_public_fields
= 1;
10497 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
10499 new_field
->virtuality
= DW_UNSND (attr
);
10501 new_field
->virtuality
= DW_VIRTUALITY_none
;
10503 fp
= &new_field
->field
;
10505 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
10509 /* Data member other than a C++ static data member. */
10511 /* Get type of field. */
10512 fp
->type
= die_type (die
, cu
);
10514 SET_FIELD_BITPOS (*fp
, 0);
10516 /* Get bit size of field (zero if none). */
10517 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
10520 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
10524 FIELD_BITSIZE (*fp
) = 0;
10527 /* Get bit offset of field. */
10528 if (handle_data_member_location (die
, cu
, &offset
))
10529 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
10530 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
10533 if (gdbarch_bits_big_endian (gdbarch
))
10535 /* For big endian bits, the DW_AT_bit_offset gives the
10536 additional bit offset from the MSB of the containing
10537 anonymous object to the MSB of the field. We don't
10538 have to do anything special since we don't need to
10539 know the size of the anonymous object. */
10540 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
10544 /* For little endian bits, compute the bit offset to the
10545 MSB of the anonymous object, subtract off the number of
10546 bits from the MSB of the field to the MSB of the
10547 object, and then subtract off the number of bits of
10548 the field itself. The result is the bit offset of
10549 the LSB of the field. */
10550 int anonymous_size
;
10551 int bit_offset
= DW_UNSND (attr
);
10553 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10556 /* The size of the anonymous object containing
10557 the bit field is explicit, so use the
10558 indicated size (in bytes). */
10559 anonymous_size
= DW_UNSND (attr
);
10563 /* The size of the anonymous object containing
10564 the bit field must be inferred from the type
10565 attribute of the data member containing the
10567 anonymous_size
= TYPE_LENGTH (fp
->type
);
10569 SET_FIELD_BITPOS (*fp
,
10570 (FIELD_BITPOS (*fp
)
10571 + anonymous_size
* bits_per_byte
10572 - bit_offset
- FIELD_BITSIZE (*fp
)));
10576 /* Get name of field. */
10577 fieldname
= dwarf2_name (die
, cu
);
10578 if (fieldname
== NULL
)
10581 /* The name is already allocated along with this objfile, so we don't
10582 need to duplicate it for the type. */
10583 fp
->name
= fieldname
;
10585 /* Change accessibility for artificial fields (e.g. virtual table
10586 pointer or virtual base class pointer) to private. */
10587 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
10589 FIELD_ARTIFICIAL (*fp
) = 1;
10590 new_field
->accessibility
= DW_ACCESS_private
;
10591 fip
->non_public_fields
= 1;
10594 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
10596 /* C++ static member. */
10598 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
10599 is a declaration, but all versions of G++ as of this writing
10600 (so through at least 3.2.1) incorrectly generate
10601 DW_TAG_variable tags. */
10603 const char *physname
;
10605 /* Get name of field. */
10606 fieldname
= dwarf2_name (die
, cu
);
10607 if (fieldname
== NULL
)
10610 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10612 /* Only create a symbol if this is an external value.
10613 new_symbol checks this and puts the value in the global symbol
10614 table, which we want. If it is not external, new_symbol
10615 will try to put the value in cu->list_in_scope which is wrong. */
10616 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
10618 /* A static const member, not much different than an enum as far as
10619 we're concerned, except that we can support more types. */
10620 new_symbol (die
, NULL
, cu
);
10623 /* Get physical name. */
10624 physname
= dwarf2_physname (fieldname
, die
, cu
);
10626 /* The name is already allocated along with this objfile, so we don't
10627 need to duplicate it for the type. */
10628 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
10629 FIELD_TYPE (*fp
) = die_type (die
, cu
);
10630 FIELD_NAME (*fp
) = fieldname
;
10632 else if (die
->tag
== DW_TAG_inheritance
)
10636 /* C++ base class field. */
10637 if (handle_data_member_location (die
, cu
, &offset
))
10638 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
10639 FIELD_BITSIZE (*fp
) = 0;
10640 FIELD_TYPE (*fp
) = die_type (die
, cu
);
10641 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
10642 fip
->nbaseclasses
++;
10646 /* Add a typedef defined in the scope of the FIP's class. */
10649 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
10650 struct dwarf2_cu
*cu
)
10652 struct objfile
*objfile
= cu
->objfile
;
10653 struct typedef_field_list
*new_field
;
10654 struct attribute
*attr
;
10655 struct typedef_field
*fp
;
10656 char *fieldname
= "";
10658 /* Allocate a new field list entry and link it in. */
10659 new_field
= xzalloc (sizeof (*new_field
));
10660 make_cleanup (xfree
, new_field
);
10662 gdb_assert (die
->tag
== DW_TAG_typedef
);
10664 fp
= &new_field
->field
;
10666 /* Get name of field. */
10667 fp
->name
= dwarf2_name (die
, cu
);
10668 if (fp
->name
== NULL
)
10671 fp
->type
= read_type_die (die
, cu
);
10673 new_field
->next
= fip
->typedef_field_list
;
10674 fip
->typedef_field_list
= new_field
;
10675 fip
->typedef_field_list_count
++;
10678 /* Create the vector of fields, and attach it to the type. */
10681 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
10682 struct dwarf2_cu
*cu
)
10684 int nfields
= fip
->nfields
;
10686 /* Record the field count, allocate space for the array of fields,
10687 and create blank accessibility bitfields if necessary. */
10688 TYPE_NFIELDS (type
) = nfields
;
10689 TYPE_FIELDS (type
) = (struct field
*)
10690 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
10691 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
10693 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
10695 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10697 TYPE_FIELD_PRIVATE_BITS (type
) =
10698 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10699 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
10701 TYPE_FIELD_PROTECTED_BITS (type
) =
10702 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10703 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
10705 TYPE_FIELD_IGNORE_BITS (type
) =
10706 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10707 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
10710 /* If the type has baseclasses, allocate and clear a bit vector for
10711 TYPE_FIELD_VIRTUAL_BITS. */
10712 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
10714 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
10715 unsigned char *pointer
;
10717 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10718 pointer
= TYPE_ALLOC (type
, num_bytes
);
10719 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
10720 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
10721 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
10724 /* Copy the saved-up fields into the field vector. Start from the head of
10725 the list, adding to the tail of the field array, so that they end up in
10726 the same order in the array in which they were added to the list. */
10727 while (nfields
-- > 0)
10729 struct nextfield
*fieldp
;
10733 fieldp
= fip
->fields
;
10734 fip
->fields
= fieldp
->next
;
10738 fieldp
= fip
->baseclasses
;
10739 fip
->baseclasses
= fieldp
->next
;
10742 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
10743 switch (fieldp
->accessibility
)
10745 case DW_ACCESS_private
:
10746 if (cu
->language
!= language_ada
)
10747 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
10750 case DW_ACCESS_protected
:
10751 if (cu
->language
!= language_ada
)
10752 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
10755 case DW_ACCESS_public
:
10759 /* Unknown accessibility. Complain and treat it as public. */
10761 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
10762 fieldp
->accessibility
);
10766 if (nfields
< fip
->nbaseclasses
)
10768 switch (fieldp
->virtuality
)
10770 case DW_VIRTUALITY_virtual
:
10771 case DW_VIRTUALITY_pure_virtual
:
10772 if (cu
->language
== language_ada
)
10773 error (_("unexpected virtuality in component of Ada type"));
10774 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
10781 /* Return true if this member function is a constructor, false
10785 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
10787 const char *fieldname
;
10788 const char *typename
;
10791 if (die
->parent
== NULL
)
10794 if (die
->parent
->tag
!= DW_TAG_structure_type
10795 && die
->parent
->tag
!= DW_TAG_union_type
10796 && die
->parent
->tag
!= DW_TAG_class_type
)
10799 fieldname
= dwarf2_name (die
, cu
);
10800 typename
= dwarf2_name (die
->parent
, cu
);
10801 if (fieldname
== NULL
|| typename
== NULL
)
10804 len
= strlen (fieldname
);
10805 return (strncmp (fieldname
, typename
, len
) == 0
10806 && (typename
[len
] == '\0' || typename
[len
] == '<'));
10809 /* Add a member function to the proper fieldlist. */
10812 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
10813 struct type
*type
, struct dwarf2_cu
*cu
)
10815 struct objfile
*objfile
= cu
->objfile
;
10816 struct attribute
*attr
;
10817 struct fnfieldlist
*flp
;
10819 struct fn_field
*fnp
;
10821 struct nextfnfield
*new_fnfield
;
10822 struct type
*this_type
;
10823 enum dwarf_access_attribute accessibility
;
10825 if (cu
->language
== language_ada
)
10826 error (_("unexpected member function in Ada type"));
10828 /* Get name of member function. */
10829 fieldname
= dwarf2_name (die
, cu
);
10830 if (fieldname
== NULL
)
10833 /* Look up member function name in fieldlist. */
10834 for (i
= 0; i
< fip
->nfnfields
; i
++)
10836 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
10840 /* Create new list element if necessary. */
10841 if (i
< fip
->nfnfields
)
10842 flp
= &fip
->fnfieldlists
[i
];
10845 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
10847 fip
->fnfieldlists
= (struct fnfieldlist
*)
10848 xrealloc (fip
->fnfieldlists
,
10849 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
10850 * sizeof (struct fnfieldlist
));
10851 if (fip
->nfnfields
== 0)
10852 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
10854 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
10855 flp
->name
= fieldname
;
10858 i
= fip
->nfnfields
++;
10861 /* Create a new member function field and chain it to the field list
10863 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
10864 make_cleanup (xfree
, new_fnfield
);
10865 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
10866 new_fnfield
->next
= flp
->head
;
10867 flp
->head
= new_fnfield
;
10870 /* Fill in the member function field info. */
10871 fnp
= &new_fnfield
->fnfield
;
10873 /* Delay processing of the physname until later. */
10874 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
10876 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
10881 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
10882 fnp
->physname
= physname
? physname
: "";
10885 fnp
->type
= alloc_type (objfile
);
10886 this_type
= read_type_die (die
, cu
);
10887 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
10889 int nparams
= TYPE_NFIELDS (this_type
);
10891 /* TYPE is the domain of this method, and THIS_TYPE is the type
10892 of the method itself (TYPE_CODE_METHOD). */
10893 smash_to_method_type (fnp
->type
, type
,
10894 TYPE_TARGET_TYPE (this_type
),
10895 TYPE_FIELDS (this_type
),
10896 TYPE_NFIELDS (this_type
),
10897 TYPE_VARARGS (this_type
));
10899 /* Handle static member functions.
10900 Dwarf2 has no clean way to discern C++ static and non-static
10901 member functions. G++ helps GDB by marking the first
10902 parameter for non-static member functions (which is the this
10903 pointer) as artificial. We obtain this information from
10904 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
10905 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
10906 fnp
->voffset
= VOFFSET_STATIC
;
10909 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
10910 dwarf2_full_name (fieldname
, die
, cu
));
10912 /* Get fcontext from DW_AT_containing_type if present. */
10913 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
10914 fnp
->fcontext
= die_containing_type (die
, cu
);
10916 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
10917 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
10919 /* Get accessibility. */
10920 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
10922 accessibility
= DW_UNSND (attr
);
10924 accessibility
= dwarf2_default_access_attribute (die
, cu
);
10925 switch (accessibility
)
10927 case DW_ACCESS_private
:
10928 fnp
->is_private
= 1;
10930 case DW_ACCESS_protected
:
10931 fnp
->is_protected
= 1;
10935 /* Check for artificial methods. */
10936 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
10937 if (attr
&& DW_UNSND (attr
) != 0)
10938 fnp
->is_artificial
= 1;
10940 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
10942 /* Get index in virtual function table if it is a virtual member
10943 function. For older versions of GCC, this is an offset in the
10944 appropriate virtual table, as specified by DW_AT_containing_type.
10945 For everyone else, it is an expression to be evaluated relative
10946 to the object address. */
10948 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
10951 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
10953 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
10955 /* Old-style GCC. */
10956 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
10958 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
10959 || (DW_BLOCK (attr
)->size
> 1
10960 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
10961 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
10963 struct dwarf_block blk
;
10966 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
10968 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
10969 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
10970 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
10971 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
10972 dwarf2_complex_location_expr_complaint ();
10974 fnp
->voffset
/= cu
->header
.addr_size
;
10978 dwarf2_complex_location_expr_complaint ();
10980 if (!fnp
->fcontext
)
10981 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
10983 else if (attr_form_is_section_offset (attr
))
10985 dwarf2_complex_location_expr_complaint ();
10989 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
10995 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
10996 if (attr
&& DW_UNSND (attr
))
10998 /* GCC does this, as of 2008-08-25; PR debug/37237. */
10999 complaint (&symfile_complaints
,
11000 _("Member function \"%s\" (offset %d) is virtual "
11001 "but the vtable offset is not specified"),
11002 fieldname
, die
->offset
.sect_off
);
11003 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11004 TYPE_CPLUS_DYNAMIC (type
) = 1;
11009 /* Create the vector of member function fields, and attach it to the type. */
11012 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
11013 struct dwarf2_cu
*cu
)
11015 struct fnfieldlist
*flp
;
11018 if (cu
->language
== language_ada
)
11019 error (_("unexpected member functions in Ada type"));
11021 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11022 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
11023 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
11025 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
11027 struct nextfnfield
*nfp
= flp
->head
;
11028 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
11031 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
11032 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
11033 fn_flp
->fn_fields
= (struct fn_field
*)
11034 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
11035 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
11036 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
11039 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
11042 /* Returns non-zero if NAME is the name of a vtable member in CU's
11043 language, zero otherwise. */
11045 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
11047 static const char vptr
[] = "_vptr";
11048 static const char vtable
[] = "vtable";
11050 /* Look for the C++ and Java forms of the vtable. */
11051 if ((cu
->language
== language_java
11052 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
11053 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
11054 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
11060 /* GCC outputs unnamed structures that are really pointers to member
11061 functions, with the ABI-specified layout. If TYPE describes
11062 such a structure, smash it into a member function type.
11064 GCC shouldn't do this; it should just output pointer to member DIEs.
11065 This is GCC PR debug/28767. */
11068 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
11070 struct type
*pfn_type
, *domain_type
, *new_type
;
11072 /* Check for a structure with no name and two children. */
11073 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
11076 /* Check for __pfn and __delta members. */
11077 if (TYPE_FIELD_NAME (type
, 0) == NULL
11078 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
11079 || TYPE_FIELD_NAME (type
, 1) == NULL
11080 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
11083 /* Find the type of the method. */
11084 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
11085 if (pfn_type
== NULL
11086 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
11087 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
11090 /* Look for the "this" argument. */
11091 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
11092 if (TYPE_NFIELDS (pfn_type
) == 0
11093 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
11094 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
11097 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
11098 new_type
= alloc_type (objfile
);
11099 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
11100 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
11101 TYPE_VARARGS (pfn_type
));
11102 smash_to_methodptr_type (type
, new_type
);
11105 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
11109 producer_is_icc (struct dwarf2_cu
*cu
)
11111 if (!cu
->checked_producer
)
11112 check_producer (cu
);
11114 return cu
->producer_is_icc
;
11117 /* Called when we find the DIE that starts a structure or union scope
11118 (definition) to create a type for the structure or union. Fill in
11119 the type's name and general properties; the members will not be
11120 processed until process_structure_type.
11122 NOTE: we need to call these functions regardless of whether or not the
11123 DIE has a DW_AT_name attribute, since it might be an anonymous
11124 structure or union. This gets the type entered into our set of
11125 user defined types.
11127 However, if the structure is incomplete (an opaque struct/union)
11128 then suppress creating a symbol table entry for it since gdb only
11129 wants to find the one with the complete definition. Note that if
11130 it is complete, we just call new_symbol, which does it's own
11131 checking about whether the struct/union is anonymous or not (and
11132 suppresses creating a symbol table entry itself). */
11134 static struct type
*
11135 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11137 struct objfile
*objfile
= cu
->objfile
;
11139 struct attribute
*attr
;
11142 /* If the definition of this type lives in .debug_types, read that type.
11143 Don't follow DW_AT_specification though, that will take us back up
11144 the chain and we want to go down. */
11145 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
11148 struct dwarf2_cu
*type_cu
= cu
;
11149 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11151 /* We could just recurse on read_structure_type, but we need to call
11152 get_die_type to ensure only one type for this DIE is created.
11153 This is important, for example, because for c++ classes we need
11154 TYPE_NAME set which is only done by new_symbol. Blech. */
11155 type
= read_type_die (type_die
, type_cu
);
11157 /* TYPE_CU may not be the same as CU.
11158 Ensure TYPE is recorded in CU's type_hash table. */
11159 return set_die_type (die
, type
, cu
);
11162 type
= alloc_type (objfile
);
11163 INIT_CPLUS_SPECIFIC (type
);
11165 name
= dwarf2_name (die
, cu
);
11168 if (cu
->language
== language_cplus
11169 || cu
->language
== language_java
)
11171 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
11173 /* dwarf2_full_name might have already finished building the DIE's
11174 type. If so, there is no need to continue. */
11175 if (get_die_type (die
, cu
) != NULL
)
11176 return get_die_type (die
, cu
);
11178 TYPE_TAG_NAME (type
) = full_name
;
11179 if (die
->tag
== DW_TAG_structure_type
11180 || die
->tag
== DW_TAG_class_type
)
11181 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
11185 /* The name is already allocated along with this objfile, so
11186 we don't need to duplicate it for the type. */
11187 TYPE_TAG_NAME (type
) = (char *) name
;
11188 if (die
->tag
== DW_TAG_class_type
)
11189 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
11193 if (die
->tag
== DW_TAG_structure_type
)
11195 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
11197 else if (die
->tag
== DW_TAG_union_type
)
11199 TYPE_CODE (type
) = TYPE_CODE_UNION
;
11203 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
11206 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
11207 TYPE_DECLARED_CLASS (type
) = 1;
11209 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11212 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11216 TYPE_LENGTH (type
) = 0;
11219 if (producer_is_icc (cu
))
11221 /* ICC does not output the required DW_AT_declaration
11222 on incomplete types, but gives them a size of zero. */
11225 TYPE_STUB_SUPPORTED (type
) = 1;
11227 if (die_is_declaration (die
, cu
))
11228 TYPE_STUB (type
) = 1;
11229 else if (attr
== NULL
&& die
->child
== NULL
11230 && producer_is_realview (cu
->producer
))
11231 /* RealView does not output the required DW_AT_declaration
11232 on incomplete types. */
11233 TYPE_STUB (type
) = 1;
11235 /* We need to add the type field to the die immediately so we don't
11236 infinitely recurse when dealing with pointers to the structure
11237 type within the structure itself. */
11238 set_die_type (die
, type
, cu
);
11240 /* set_die_type should be already done. */
11241 set_descriptive_type (type
, die
, cu
);
11246 /* Finish creating a structure or union type, including filling in
11247 its members and creating a symbol for it. */
11250 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11252 struct objfile
*objfile
= cu
->objfile
;
11253 struct die_info
*child_die
= die
->child
;
11256 type
= get_die_type (die
, cu
);
11258 type
= read_structure_type (die
, cu
);
11260 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
11262 struct field_info fi
;
11263 struct die_info
*child_die
;
11264 VEC (symbolp
) *template_args
= NULL
;
11265 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
11267 memset (&fi
, 0, sizeof (struct field_info
));
11269 child_die
= die
->child
;
11271 while (child_die
&& child_die
->tag
)
11273 if (child_die
->tag
== DW_TAG_member
11274 || child_die
->tag
== DW_TAG_variable
)
11276 /* NOTE: carlton/2002-11-05: A C++ static data member
11277 should be a DW_TAG_member that is a declaration, but
11278 all versions of G++ as of this writing (so through at
11279 least 3.2.1) incorrectly generate DW_TAG_variable
11280 tags for them instead. */
11281 dwarf2_add_field (&fi
, child_die
, cu
);
11283 else if (child_die
->tag
== DW_TAG_subprogram
)
11285 /* C++ member function. */
11286 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
11288 else if (child_die
->tag
== DW_TAG_inheritance
)
11290 /* C++ base class field. */
11291 dwarf2_add_field (&fi
, child_die
, cu
);
11293 else if (child_die
->tag
== DW_TAG_typedef
)
11294 dwarf2_add_typedef (&fi
, child_die
, cu
);
11295 else if (child_die
->tag
== DW_TAG_template_type_param
11296 || child_die
->tag
== DW_TAG_template_value_param
)
11298 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11301 VEC_safe_push (symbolp
, template_args
, arg
);
11304 child_die
= sibling_die (child_die
);
11307 /* Attach template arguments to type. */
11308 if (! VEC_empty (symbolp
, template_args
))
11310 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11311 TYPE_N_TEMPLATE_ARGUMENTS (type
)
11312 = VEC_length (symbolp
, template_args
);
11313 TYPE_TEMPLATE_ARGUMENTS (type
)
11314 = obstack_alloc (&objfile
->objfile_obstack
,
11315 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
11316 * sizeof (struct symbol
*)));
11317 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
11318 VEC_address (symbolp
, template_args
),
11319 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
11320 * sizeof (struct symbol
*)));
11321 VEC_free (symbolp
, template_args
);
11324 /* Attach fields and member functions to the type. */
11326 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
11329 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
11331 /* Get the type which refers to the base class (possibly this
11332 class itself) which contains the vtable pointer for the current
11333 class from the DW_AT_containing_type attribute. This use of
11334 DW_AT_containing_type is a GNU extension. */
11336 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
11338 struct type
*t
= die_containing_type (die
, cu
);
11340 TYPE_VPTR_BASETYPE (type
) = t
;
11345 /* Our own class provides vtbl ptr. */
11346 for (i
= TYPE_NFIELDS (t
) - 1;
11347 i
>= TYPE_N_BASECLASSES (t
);
11350 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
11352 if (is_vtable_name (fieldname
, cu
))
11354 TYPE_VPTR_FIELDNO (type
) = i
;
11359 /* Complain if virtual function table field not found. */
11360 if (i
< TYPE_N_BASECLASSES (t
))
11361 complaint (&symfile_complaints
,
11362 _("virtual function table pointer "
11363 "not found when defining class '%s'"),
11364 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
11369 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
11372 else if (cu
->producer
11373 && strncmp (cu
->producer
,
11374 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
11376 /* The IBM XLC compiler does not provide direct indication
11377 of the containing type, but the vtable pointer is
11378 always named __vfp. */
11382 for (i
= TYPE_NFIELDS (type
) - 1;
11383 i
>= TYPE_N_BASECLASSES (type
);
11386 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
11388 TYPE_VPTR_FIELDNO (type
) = i
;
11389 TYPE_VPTR_BASETYPE (type
) = type
;
11396 /* Copy fi.typedef_field_list linked list elements content into the
11397 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
11398 if (fi
.typedef_field_list
)
11400 int i
= fi
.typedef_field_list_count
;
11402 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11403 TYPE_TYPEDEF_FIELD_ARRAY (type
)
11404 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
11405 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
11407 /* Reverse the list order to keep the debug info elements order. */
11410 struct typedef_field
*dest
, *src
;
11412 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
11413 src
= &fi
.typedef_field_list
->field
;
11414 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
11419 do_cleanups (back_to
);
11421 if (HAVE_CPLUS_STRUCT (type
))
11422 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
11425 quirk_gcc_member_function_pointer (type
, objfile
);
11427 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
11428 snapshots) has been known to create a die giving a declaration
11429 for a class that has, as a child, a die giving a definition for a
11430 nested class. So we have to process our children even if the
11431 current die is a declaration. Normally, of course, a declaration
11432 won't have any children at all. */
11434 while (child_die
!= NULL
&& child_die
->tag
)
11436 if (child_die
->tag
== DW_TAG_member
11437 || child_die
->tag
== DW_TAG_variable
11438 || child_die
->tag
== DW_TAG_inheritance
11439 || child_die
->tag
== DW_TAG_template_value_param
11440 || child_die
->tag
== DW_TAG_template_type_param
)
11445 process_die (child_die
, cu
);
11447 child_die
= sibling_die (child_die
);
11450 /* Do not consider external references. According to the DWARF standard,
11451 these DIEs are identified by the fact that they have no byte_size
11452 attribute, and a declaration attribute. */
11453 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
11454 || !die_is_declaration (die
, cu
))
11455 new_symbol (die
, type
, cu
);
11458 /* Given a DW_AT_enumeration_type die, set its type. We do not
11459 complete the type's fields yet, or create any symbols. */
11461 static struct type
*
11462 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11464 struct objfile
*objfile
= cu
->objfile
;
11466 struct attribute
*attr
;
11469 /* If the definition of this type lives in .debug_types, read that type.
11470 Don't follow DW_AT_specification though, that will take us back up
11471 the chain and we want to go down. */
11472 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
11475 struct dwarf2_cu
*type_cu
= cu
;
11476 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11478 type
= read_type_die (type_die
, type_cu
);
11480 /* TYPE_CU may not be the same as CU.
11481 Ensure TYPE is recorded in CU's type_hash table. */
11482 return set_die_type (die
, type
, cu
);
11485 type
= alloc_type (objfile
);
11487 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
11488 name
= dwarf2_full_name (NULL
, die
, cu
);
11490 TYPE_TAG_NAME (type
) = (char *) name
;
11492 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11495 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11499 TYPE_LENGTH (type
) = 0;
11502 /* The enumeration DIE can be incomplete. In Ada, any type can be
11503 declared as private in the package spec, and then defined only
11504 inside the package body. Such types are known as Taft Amendment
11505 Types. When another package uses such a type, an incomplete DIE
11506 may be generated by the compiler. */
11507 if (die_is_declaration (die
, cu
))
11508 TYPE_STUB (type
) = 1;
11510 return set_die_type (die
, type
, cu
);
11513 /* Given a pointer to a die which begins an enumeration, process all
11514 the dies that define the members of the enumeration, and create the
11515 symbol for the enumeration type.
11517 NOTE: We reverse the order of the element list. */
11520 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11522 struct type
*this_type
;
11524 this_type
= get_die_type (die
, cu
);
11525 if (this_type
== NULL
)
11526 this_type
= read_enumeration_type (die
, cu
);
11528 if (die
->child
!= NULL
)
11530 struct die_info
*child_die
;
11531 struct symbol
*sym
;
11532 struct field
*fields
= NULL
;
11533 int num_fields
= 0;
11534 int unsigned_enum
= 1;
11539 child_die
= die
->child
;
11540 while (child_die
&& child_die
->tag
)
11542 if (child_die
->tag
!= DW_TAG_enumerator
)
11544 process_die (child_die
, cu
);
11548 name
= dwarf2_name (child_die
, cu
);
11551 sym
= new_symbol (child_die
, this_type
, cu
);
11552 if (SYMBOL_VALUE (sym
) < 0)
11557 else if ((mask
& SYMBOL_VALUE (sym
)) != 0)
11560 mask
|= SYMBOL_VALUE (sym
);
11562 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
11564 fields
= (struct field
*)
11566 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
11567 * sizeof (struct field
));
11570 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
11571 FIELD_TYPE (fields
[num_fields
]) = NULL
;
11572 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
11573 FIELD_BITSIZE (fields
[num_fields
]) = 0;
11579 child_die
= sibling_die (child_die
);
11584 TYPE_NFIELDS (this_type
) = num_fields
;
11585 TYPE_FIELDS (this_type
) = (struct field
*)
11586 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
11587 memcpy (TYPE_FIELDS (this_type
), fields
,
11588 sizeof (struct field
) * num_fields
);
11592 TYPE_UNSIGNED (this_type
) = 1;
11594 TYPE_FLAG_ENUM (this_type
) = 1;
11597 /* If we are reading an enum from a .debug_types unit, and the enum
11598 is a declaration, and the enum is not the signatured type in the
11599 unit, then we do not want to add a symbol for it. Adding a
11600 symbol would in some cases obscure the true definition of the
11601 enum, giving users an incomplete type when the definition is
11602 actually available. Note that we do not want to do this for all
11603 enums which are just declarations, because C++0x allows forward
11604 enum declarations. */
11605 if (cu
->per_cu
->is_debug_types
11606 && die_is_declaration (die
, cu
))
11608 struct signatured_type
*sig_type
;
11611 = lookup_signatured_type_at_offset (dwarf2_per_objfile
->objfile
,
11612 cu
->per_cu
->info_or_types_section
,
11613 cu
->per_cu
->offset
);
11614 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
11615 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
11619 new_symbol (die
, this_type
, cu
);
11622 /* Extract all information from a DW_TAG_array_type DIE and put it in
11623 the DIE's type field. For now, this only handles one dimensional
11626 static struct type
*
11627 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11629 struct objfile
*objfile
= cu
->objfile
;
11630 struct die_info
*child_die
;
11632 struct type
*element_type
, *range_type
, *index_type
;
11633 struct type
**range_types
= NULL
;
11634 struct attribute
*attr
;
11636 struct cleanup
*back_to
;
11639 element_type
= die_type (die
, cu
);
11641 /* The die_type call above may have already set the type for this DIE. */
11642 type
= get_die_type (die
, cu
);
11646 /* Irix 6.2 native cc creates array types without children for
11647 arrays with unspecified length. */
11648 if (die
->child
== NULL
)
11650 index_type
= objfile_type (objfile
)->builtin_int
;
11651 range_type
= create_range_type (NULL
, index_type
, 0, -1);
11652 type
= create_array_type (NULL
, element_type
, range_type
);
11653 return set_die_type (die
, type
, cu
);
11656 back_to
= make_cleanup (null_cleanup
, NULL
);
11657 child_die
= die
->child
;
11658 while (child_die
&& child_die
->tag
)
11660 if (child_die
->tag
== DW_TAG_subrange_type
)
11662 struct type
*child_type
= read_type_die (child_die
, cu
);
11664 if (child_type
!= NULL
)
11666 /* The range type was succesfully read. Save it for the
11667 array type creation. */
11668 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
11670 range_types
= (struct type
**)
11671 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
11672 * sizeof (struct type
*));
11674 make_cleanup (free_current_contents
, &range_types
);
11676 range_types
[ndim
++] = child_type
;
11679 child_die
= sibling_die (child_die
);
11682 /* Dwarf2 dimensions are output from left to right, create the
11683 necessary array types in backwards order. */
11685 type
= element_type
;
11687 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
11692 type
= create_array_type (NULL
, type
, range_types
[i
++]);
11697 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
11700 /* Understand Dwarf2 support for vector types (like they occur on
11701 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
11702 array type. This is not part of the Dwarf2/3 standard yet, but a
11703 custom vendor extension. The main difference between a regular
11704 array and the vector variant is that vectors are passed by value
11706 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
11708 make_vector_type (type
);
11710 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
11711 implementation may choose to implement triple vectors using this
11713 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11716 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
11717 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11719 complaint (&symfile_complaints
,
11720 _("DW_AT_byte_size for array type smaller "
11721 "than the total size of elements"));
11724 name
= dwarf2_name (die
, cu
);
11726 TYPE_NAME (type
) = name
;
11728 /* Install the type in the die. */
11729 set_die_type (die
, type
, cu
);
11731 /* set_die_type should be already done. */
11732 set_descriptive_type (type
, die
, cu
);
11734 do_cleanups (back_to
);
11739 static enum dwarf_array_dim_ordering
11740 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
11742 struct attribute
*attr
;
11744 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
11746 if (attr
) return DW_SND (attr
);
11748 /* GNU F77 is a special case, as at 08/2004 array type info is the
11749 opposite order to the dwarf2 specification, but data is still
11750 laid out as per normal fortran.
11752 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
11753 version checking. */
11755 if (cu
->language
== language_fortran
11756 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
11758 return DW_ORD_row_major
;
11761 switch (cu
->language_defn
->la_array_ordering
)
11763 case array_column_major
:
11764 return DW_ORD_col_major
;
11765 case array_row_major
:
11767 return DW_ORD_row_major
;
11771 /* Extract all information from a DW_TAG_set_type DIE and put it in
11772 the DIE's type field. */
11774 static struct type
*
11775 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11777 struct type
*domain_type
, *set_type
;
11778 struct attribute
*attr
;
11780 domain_type
= die_type (die
, cu
);
11782 /* The die_type call above may have already set the type for this DIE. */
11783 set_type
= get_die_type (die
, cu
);
11787 set_type
= create_set_type (NULL
, domain_type
);
11789 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11791 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
11793 return set_die_type (die
, set_type
, cu
);
11796 /* A helper for read_common_block that creates a locexpr baton.
11797 SYM is the symbol which we are marking as computed.
11798 COMMON_DIE is the DIE for the common block.
11799 COMMON_LOC is the location expression attribute for the common
11801 MEMBER_LOC is the location expression attribute for the particular
11802 member of the common block that we are processing.
11803 CU is the CU from which the above come. */
11806 mark_common_block_symbol_computed (struct symbol
*sym
,
11807 struct die_info
*common_die
,
11808 struct attribute
*common_loc
,
11809 struct attribute
*member_loc
,
11810 struct dwarf2_cu
*cu
)
11812 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11813 struct dwarf2_locexpr_baton
*baton
;
11815 unsigned int cu_off
;
11816 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
11817 LONGEST offset
= 0;
11819 gdb_assert (common_loc
&& member_loc
);
11820 gdb_assert (attr_form_is_block (common_loc
));
11821 gdb_assert (attr_form_is_block (member_loc
)
11822 || attr_form_is_constant (member_loc
));
11824 baton
= obstack_alloc (&objfile
->objfile_obstack
,
11825 sizeof (struct dwarf2_locexpr_baton
));
11826 baton
->per_cu
= cu
->per_cu
;
11827 gdb_assert (baton
->per_cu
);
11829 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
11831 if (attr_form_is_constant (member_loc
))
11833 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
11834 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
11837 baton
->size
+= DW_BLOCK (member_loc
)->size
;
11839 ptr
= obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
11842 *ptr
++ = DW_OP_call4
;
11843 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
11844 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
11847 if (attr_form_is_constant (member_loc
))
11849 *ptr
++ = DW_OP_addr
;
11850 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
11851 ptr
+= cu
->header
.addr_size
;
11855 /* We have to copy the data here, because DW_OP_call4 will only
11856 use a DW_AT_location attribute. */
11857 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
11858 ptr
+= DW_BLOCK (member_loc
)->size
;
11861 *ptr
++ = DW_OP_plus
;
11862 gdb_assert (ptr
- baton
->data
== baton
->size
);
11864 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11865 SYMBOL_LOCATION_BATON (sym
) = baton
;
11866 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
11869 /* Create appropriate locally-scoped variables for all the
11870 DW_TAG_common_block entries. Also create a struct common_block
11871 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
11872 is used to sepate the common blocks name namespace from regular
11876 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
11878 struct attribute
*attr
;
11880 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
11883 /* Support the .debug_loc offsets. */
11884 if (attr_form_is_block (attr
))
11888 else if (attr_form_is_section_offset (attr
))
11890 dwarf2_complex_location_expr_complaint ();
11895 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
11896 "common block member");
11901 if (die
->child
!= NULL
)
11903 struct objfile
*objfile
= cu
->objfile
;
11904 struct die_info
*child_die
;
11905 size_t n_entries
= 0, size
;
11906 struct common_block
*common_block
;
11907 struct symbol
*sym
;
11909 for (child_die
= die
->child
;
11910 child_die
&& child_die
->tag
;
11911 child_die
= sibling_die (child_die
))
11914 size
= (sizeof (struct common_block
)
11915 + (n_entries
- 1) * sizeof (struct symbol
*));
11916 common_block
= obstack_alloc (&objfile
->objfile_obstack
, size
);
11917 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
11918 common_block
->n_entries
= 0;
11920 for (child_die
= die
->child
;
11921 child_die
&& child_die
->tag
;
11922 child_die
= sibling_die (child_die
))
11924 /* Create the symbol in the DW_TAG_common_block block in the current
11926 sym
= new_symbol (child_die
, NULL
, cu
);
11929 struct attribute
*member_loc
;
11931 common_block
->contents
[common_block
->n_entries
++] = sym
;
11933 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
11937 /* GDB has handled this for a long time, but it is
11938 not specified by DWARF. It seems to have been
11939 emitted by gfortran at least as recently as:
11940 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
11941 complaint (&symfile_complaints
,
11942 _("Variable in common block has "
11943 "DW_AT_data_member_location "
11944 "- DIE at 0x%x [in module %s]"),
11945 child_die
->offset
.sect_off
, cu
->objfile
->name
);
11947 if (attr_form_is_section_offset (member_loc
))
11948 dwarf2_complex_location_expr_complaint ();
11949 else if (attr_form_is_constant (member_loc
)
11950 || attr_form_is_block (member_loc
))
11953 mark_common_block_symbol_computed (sym
, die
, attr
,
11957 dwarf2_complex_location_expr_complaint ();
11962 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
11963 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
11967 /* Create a type for a C++ namespace. */
11969 static struct type
*
11970 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11972 struct objfile
*objfile
= cu
->objfile
;
11973 const char *previous_prefix
, *name
;
11977 /* For extensions, reuse the type of the original namespace. */
11978 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
11980 struct die_info
*ext_die
;
11981 struct dwarf2_cu
*ext_cu
= cu
;
11983 ext_die
= dwarf2_extension (die
, &ext_cu
);
11984 type
= read_type_die (ext_die
, ext_cu
);
11986 /* EXT_CU may not be the same as CU.
11987 Ensure TYPE is recorded in CU's type_hash table. */
11988 return set_die_type (die
, type
, cu
);
11991 name
= namespace_name (die
, &is_anonymous
, cu
);
11993 /* Now build the name of the current namespace. */
11995 previous_prefix
= determine_prefix (die
, cu
);
11996 if (previous_prefix
[0] != '\0')
11997 name
= typename_concat (&objfile
->objfile_obstack
,
11998 previous_prefix
, name
, 0, cu
);
12000 /* Create the type. */
12001 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
12003 TYPE_NAME (type
) = (char *) name
;
12004 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
12006 return set_die_type (die
, type
, cu
);
12009 /* Read a C++ namespace. */
12012 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
12014 struct objfile
*objfile
= cu
->objfile
;
12017 /* Add a symbol associated to this if we haven't seen the namespace
12018 before. Also, add a using directive if it's an anonymous
12021 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
12025 type
= read_type_die (die
, cu
);
12026 new_symbol (die
, type
, cu
);
12028 namespace_name (die
, &is_anonymous
, cu
);
12031 const char *previous_prefix
= determine_prefix (die
, cu
);
12033 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
12034 NULL
, NULL
, &objfile
->objfile_obstack
);
12038 if (die
->child
!= NULL
)
12040 struct die_info
*child_die
= die
->child
;
12042 while (child_die
&& child_die
->tag
)
12044 process_die (child_die
, cu
);
12045 child_die
= sibling_die (child_die
);
12050 /* Read a Fortran module as type. This DIE can be only a declaration used for
12051 imported module. Still we need that type as local Fortran "use ... only"
12052 declaration imports depend on the created type in determine_prefix. */
12054 static struct type
*
12055 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12057 struct objfile
*objfile
= cu
->objfile
;
12061 module_name
= dwarf2_name (die
, cu
);
12063 complaint (&symfile_complaints
,
12064 _("DW_TAG_module has no name, offset 0x%x"),
12065 die
->offset
.sect_off
);
12066 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
12068 /* determine_prefix uses TYPE_TAG_NAME. */
12069 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
12071 return set_die_type (die
, type
, cu
);
12074 /* Read a Fortran module. */
12077 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
12079 struct die_info
*child_die
= die
->child
;
12081 while (child_die
&& child_die
->tag
)
12083 process_die (child_die
, cu
);
12084 child_die
= sibling_die (child_die
);
12088 /* Return the name of the namespace represented by DIE. Set
12089 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
12092 static const char *
12093 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
12095 struct die_info
*current_die
;
12096 const char *name
= NULL
;
12098 /* Loop through the extensions until we find a name. */
12100 for (current_die
= die
;
12101 current_die
!= NULL
;
12102 current_die
= dwarf2_extension (die
, &cu
))
12104 name
= dwarf2_name (current_die
, cu
);
12109 /* Is it an anonymous namespace? */
12111 *is_anonymous
= (name
== NULL
);
12113 name
= CP_ANONYMOUS_NAMESPACE_STR
;
12118 /* Extract all information from a DW_TAG_pointer_type DIE and add to
12119 the user defined type vector. */
12121 static struct type
*
12122 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12124 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
12125 struct comp_unit_head
*cu_header
= &cu
->header
;
12127 struct attribute
*attr_byte_size
;
12128 struct attribute
*attr_address_class
;
12129 int byte_size
, addr_class
;
12130 struct type
*target_type
;
12132 target_type
= die_type (die
, cu
);
12134 /* The die_type call above may have already set the type for this DIE. */
12135 type
= get_die_type (die
, cu
);
12139 type
= lookup_pointer_type (target_type
);
12141 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12142 if (attr_byte_size
)
12143 byte_size
= DW_UNSND (attr_byte_size
);
12145 byte_size
= cu_header
->addr_size
;
12147 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
12148 if (attr_address_class
)
12149 addr_class
= DW_UNSND (attr_address_class
);
12151 addr_class
= DW_ADDR_none
;
12153 /* If the pointer size or address class is different than the
12154 default, create a type variant marked as such and set the
12155 length accordingly. */
12156 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
12158 if (gdbarch_address_class_type_flags_p (gdbarch
))
12162 type_flags
= gdbarch_address_class_type_flags
12163 (gdbarch
, byte_size
, addr_class
);
12164 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
12166 type
= make_type_with_address_space (type
, type_flags
);
12168 else if (TYPE_LENGTH (type
) != byte_size
)
12170 complaint (&symfile_complaints
,
12171 _("invalid pointer size %d"), byte_size
);
12175 /* Should we also complain about unhandled address classes? */
12179 TYPE_LENGTH (type
) = byte_size
;
12180 return set_die_type (die
, type
, cu
);
12183 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
12184 the user defined type vector. */
12186 static struct type
*
12187 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12190 struct type
*to_type
;
12191 struct type
*domain
;
12193 to_type
= die_type (die
, cu
);
12194 domain
= die_containing_type (die
, cu
);
12196 /* The calls above may have already set the type for this DIE. */
12197 type
= get_die_type (die
, cu
);
12201 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
12202 type
= lookup_methodptr_type (to_type
);
12204 type
= lookup_memberptr_type (to_type
, domain
);
12206 return set_die_type (die
, type
, cu
);
12209 /* Extract all information from a DW_TAG_reference_type DIE and add to
12210 the user defined type vector. */
12212 static struct type
*
12213 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12215 struct comp_unit_head
*cu_header
= &cu
->header
;
12216 struct type
*type
, *target_type
;
12217 struct attribute
*attr
;
12219 target_type
= die_type (die
, cu
);
12221 /* The die_type call above may have already set the type for this DIE. */
12222 type
= get_die_type (die
, cu
);
12226 type
= lookup_reference_type (target_type
);
12227 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12230 TYPE_LENGTH (type
) = DW_UNSND (attr
);
12234 TYPE_LENGTH (type
) = cu_header
->addr_size
;
12236 return set_die_type (die
, type
, cu
);
12239 static struct type
*
12240 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12242 struct type
*base_type
, *cv_type
;
12244 base_type
= die_type (die
, cu
);
12246 /* The die_type call above may have already set the type for this DIE. */
12247 cv_type
= get_die_type (die
, cu
);
12251 /* In case the const qualifier is applied to an array type, the element type
12252 is so qualified, not the array type (section 6.7.3 of C99). */
12253 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
12255 struct type
*el_type
, *inner_array
;
12257 base_type
= copy_type (base_type
);
12258 inner_array
= base_type
;
12260 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
12262 TYPE_TARGET_TYPE (inner_array
) =
12263 copy_type (TYPE_TARGET_TYPE (inner_array
));
12264 inner_array
= TYPE_TARGET_TYPE (inner_array
);
12267 el_type
= TYPE_TARGET_TYPE (inner_array
);
12268 TYPE_TARGET_TYPE (inner_array
) =
12269 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
12271 return set_die_type (die
, base_type
, cu
);
12274 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
12275 return set_die_type (die
, cv_type
, cu
);
12278 static struct type
*
12279 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12281 struct type
*base_type
, *cv_type
;
12283 base_type
= die_type (die
, cu
);
12285 /* The die_type call above may have already set the type for this DIE. */
12286 cv_type
= get_die_type (die
, cu
);
12290 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
12291 return set_die_type (die
, cv_type
, cu
);
12294 /* Extract all information from a DW_TAG_string_type DIE and add to
12295 the user defined type vector. It isn't really a user defined type,
12296 but it behaves like one, with other DIE's using an AT_user_def_type
12297 attribute to reference it. */
12299 static struct type
*
12300 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12302 struct objfile
*objfile
= cu
->objfile
;
12303 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12304 struct type
*type
, *range_type
, *index_type
, *char_type
;
12305 struct attribute
*attr
;
12306 unsigned int length
;
12308 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
12311 length
= DW_UNSND (attr
);
12315 /* Check for the DW_AT_byte_size attribute. */
12316 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12319 length
= DW_UNSND (attr
);
12327 index_type
= objfile_type (objfile
)->builtin_int
;
12328 range_type
= create_range_type (NULL
, index_type
, 1, length
);
12329 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
12330 type
= create_string_type (NULL
, char_type
, range_type
);
12332 return set_die_type (die
, type
, cu
);
12335 /* Handle DIES due to C code like:
12339 int (*funcp)(int a, long l);
12343 ('funcp' generates a DW_TAG_subroutine_type DIE). */
12345 static struct type
*
12346 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12348 struct objfile
*objfile
= cu
->objfile
;
12349 struct type
*type
; /* Type that this function returns. */
12350 struct type
*ftype
; /* Function that returns above type. */
12351 struct attribute
*attr
;
12353 type
= die_type (die
, cu
);
12355 /* The die_type call above may have already set the type for this DIE. */
12356 ftype
= get_die_type (die
, cu
);
12360 ftype
= lookup_function_type (type
);
12362 /* All functions in C++, Pascal and Java have prototypes. */
12363 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
12364 if ((attr
&& (DW_UNSND (attr
) != 0))
12365 || cu
->language
== language_cplus
12366 || cu
->language
== language_java
12367 || cu
->language
== language_pascal
)
12368 TYPE_PROTOTYPED (ftype
) = 1;
12369 else if (producer_is_realview (cu
->producer
))
12370 /* RealView does not emit DW_AT_prototyped. We can not
12371 distinguish prototyped and unprototyped functions; default to
12372 prototyped, since that is more common in modern code (and
12373 RealView warns about unprototyped functions). */
12374 TYPE_PROTOTYPED (ftype
) = 1;
12376 /* Store the calling convention in the type if it's available in
12377 the subroutine die. Otherwise set the calling convention to
12378 the default value DW_CC_normal. */
12379 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
12381 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
12382 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
12383 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
12385 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
12387 /* We need to add the subroutine type to the die immediately so
12388 we don't infinitely recurse when dealing with parameters
12389 declared as the same subroutine type. */
12390 set_die_type (die
, ftype
, cu
);
12392 if (die
->child
!= NULL
)
12394 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
12395 struct die_info
*child_die
;
12396 int nparams
, iparams
;
12398 /* Count the number of parameters.
12399 FIXME: GDB currently ignores vararg functions, but knows about
12400 vararg member functions. */
12402 child_die
= die
->child
;
12403 while (child_die
&& child_die
->tag
)
12405 if (child_die
->tag
== DW_TAG_formal_parameter
)
12407 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
12408 TYPE_VARARGS (ftype
) = 1;
12409 child_die
= sibling_die (child_die
);
12412 /* Allocate storage for parameters and fill them in. */
12413 TYPE_NFIELDS (ftype
) = nparams
;
12414 TYPE_FIELDS (ftype
) = (struct field
*)
12415 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
12417 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
12418 even if we error out during the parameters reading below. */
12419 for (iparams
= 0; iparams
< nparams
; iparams
++)
12420 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
12423 child_die
= die
->child
;
12424 while (child_die
&& child_die
->tag
)
12426 if (child_die
->tag
== DW_TAG_formal_parameter
)
12428 struct type
*arg_type
;
12430 /* DWARF version 2 has no clean way to discern C++
12431 static and non-static member functions. G++ helps
12432 GDB by marking the first parameter for non-static
12433 member functions (which is the this pointer) as
12434 artificial. We pass this information to
12435 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
12437 DWARF version 3 added DW_AT_object_pointer, which GCC
12438 4.5 does not yet generate. */
12439 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
12441 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
12444 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
12446 /* GCC/43521: In java, the formal parameter
12447 "this" is sometimes not marked with DW_AT_artificial. */
12448 if (cu
->language
== language_java
)
12450 const char *name
= dwarf2_name (child_die
, cu
);
12452 if (name
&& !strcmp (name
, "this"))
12453 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
12456 arg_type
= die_type (child_die
, cu
);
12458 /* RealView does not mark THIS as const, which the testsuite
12459 expects. GCC marks THIS as const in method definitions,
12460 but not in the class specifications (GCC PR 43053). */
12461 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
12462 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
12465 struct dwarf2_cu
*arg_cu
= cu
;
12466 const char *name
= dwarf2_name (child_die
, cu
);
12468 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
12471 /* If the compiler emits this, use it. */
12472 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
12475 else if (name
&& strcmp (name
, "this") == 0)
12476 /* Function definitions will have the argument names. */
12478 else if (name
== NULL
&& iparams
== 0)
12479 /* Declarations may not have the names, so like
12480 elsewhere in GDB, assume an artificial first
12481 argument is "this". */
12485 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
12489 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
12492 child_die
= sibling_die (child_die
);
12499 static struct type
*
12500 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
12502 struct objfile
*objfile
= cu
->objfile
;
12503 const char *name
= NULL
;
12504 struct type
*this_type
, *target_type
;
12506 name
= dwarf2_full_name (NULL
, die
, cu
);
12507 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
12508 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
12509 TYPE_NAME (this_type
) = (char *) name
;
12510 set_die_type (die
, this_type
, cu
);
12511 target_type
= die_type (die
, cu
);
12512 if (target_type
!= this_type
)
12513 TYPE_TARGET_TYPE (this_type
) = target_type
;
12516 /* Self-referential typedefs are, it seems, not allowed by the DWARF
12517 spec and cause infinite loops in GDB. */
12518 complaint (&symfile_complaints
,
12519 _("Self-referential DW_TAG_typedef "
12520 "- DIE at 0x%x [in module %s]"),
12521 die
->offset
.sect_off
, objfile
->name
);
12522 TYPE_TARGET_TYPE (this_type
) = NULL
;
12527 /* Find a representation of a given base type and install
12528 it in the TYPE field of the die. */
12530 static struct type
*
12531 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12533 struct objfile
*objfile
= cu
->objfile
;
12535 struct attribute
*attr
;
12536 int encoding
= 0, size
= 0;
12538 enum type_code code
= TYPE_CODE_INT
;
12539 int type_flags
= 0;
12540 struct type
*target_type
= NULL
;
12542 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
12545 encoding
= DW_UNSND (attr
);
12547 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12550 size
= DW_UNSND (attr
);
12552 name
= dwarf2_name (die
, cu
);
12555 complaint (&symfile_complaints
,
12556 _("DW_AT_name missing from DW_TAG_base_type"));
12561 case DW_ATE_address
:
12562 /* Turn DW_ATE_address into a void * pointer. */
12563 code
= TYPE_CODE_PTR
;
12564 type_flags
|= TYPE_FLAG_UNSIGNED
;
12565 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
12567 case DW_ATE_boolean
:
12568 code
= TYPE_CODE_BOOL
;
12569 type_flags
|= TYPE_FLAG_UNSIGNED
;
12571 case DW_ATE_complex_float
:
12572 code
= TYPE_CODE_COMPLEX
;
12573 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
12575 case DW_ATE_decimal_float
:
12576 code
= TYPE_CODE_DECFLOAT
;
12579 code
= TYPE_CODE_FLT
;
12581 case DW_ATE_signed
:
12583 case DW_ATE_unsigned
:
12584 type_flags
|= TYPE_FLAG_UNSIGNED
;
12585 if (cu
->language
== language_fortran
12587 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
12588 code
= TYPE_CODE_CHAR
;
12590 case DW_ATE_signed_char
:
12591 if (cu
->language
== language_ada
|| cu
->language
== language_m2
12592 || cu
->language
== language_pascal
12593 || cu
->language
== language_fortran
)
12594 code
= TYPE_CODE_CHAR
;
12596 case DW_ATE_unsigned_char
:
12597 if (cu
->language
== language_ada
|| cu
->language
== language_m2
12598 || cu
->language
== language_pascal
12599 || cu
->language
== language_fortran
)
12600 code
= TYPE_CODE_CHAR
;
12601 type_flags
|= TYPE_FLAG_UNSIGNED
;
12604 /* We just treat this as an integer and then recognize the
12605 type by name elsewhere. */
12609 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
12610 dwarf_type_encoding_name (encoding
));
12614 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
12615 TYPE_NAME (type
) = name
;
12616 TYPE_TARGET_TYPE (type
) = target_type
;
12618 if (name
&& strcmp (name
, "char") == 0)
12619 TYPE_NOSIGN (type
) = 1;
12621 return set_die_type (die
, type
, cu
);
12624 /* Read the given DW_AT_subrange DIE. */
12626 static struct type
*
12627 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12629 struct type
*base_type
;
12630 struct type
*range_type
;
12631 struct attribute
*attr
;
12633 int low_default_is_valid
;
12635 LONGEST negative_mask
;
12637 base_type
= die_type (die
, cu
);
12638 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
12639 check_typedef (base_type
);
12641 /* The die_type call above may have already set the type for this DIE. */
12642 range_type
= get_die_type (die
, cu
);
12646 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
12647 omitting DW_AT_lower_bound. */
12648 switch (cu
->language
)
12651 case language_cplus
:
12653 low_default_is_valid
= 1;
12655 case language_fortran
:
12657 low_default_is_valid
= 1;
12660 case language_java
:
12661 case language_objc
:
12663 low_default_is_valid
= (cu
->header
.version
>= 4);
12667 case language_pascal
:
12669 low_default_is_valid
= (cu
->header
.version
>= 4);
12673 low_default_is_valid
= 0;
12677 /* FIXME: For variable sized arrays either of these could be
12678 a variable rather than a constant value. We'll allow it,
12679 but we don't know how to handle it. */
12680 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
12682 low
= dwarf2_get_attr_constant_value (attr
, low
);
12683 else if (!low_default_is_valid
)
12684 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
12685 "- DIE at 0x%x [in module %s]"),
12686 die
->offset
.sect_off
, cu
->objfile
->name
);
12688 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
12691 if (attr_form_is_block (attr
) || is_ref_attr (attr
))
12693 /* GCC encodes arrays with unspecified or dynamic length
12694 with a DW_FORM_block1 attribute or a reference attribute.
12695 FIXME: GDB does not yet know how to handle dynamic
12696 arrays properly, treat them as arrays with unspecified
12699 FIXME: jimb/2003-09-22: GDB does not really know
12700 how to handle arrays of unspecified length
12701 either; we just represent them as zero-length
12702 arrays. Choose an appropriate upper bound given
12703 the lower bound we've computed above. */
12707 high
= dwarf2_get_attr_constant_value (attr
, 1);
12711 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
12714 int count
= dwarf2_get_attr_constant_value (attr
, 1);
12715 high
= low
+ count
- 1;
12719 /* Unspecified array length. */
12724 /* Dwarf-2 specifications explicitly allows to create subrange types
12725 without specifying a base type.
12726 In that case, the base type must be set to the type of
12727 the lower bound, upper bound or count, in that order, if any of these
12728 three attributes references an object that has a type.
12729 If no base type is found, the Dwarf-2 specifications say that
12730 a signed integer type of size equal to the size of an address should
12732 For the following C code: `extern char gdb_int [];'
12733 GCC produces an empty range DIE.
12734 FIXME: muller/2010-05-28: Possible references to object for low bound,
12735 high bound or count are not yet handled by this code. */
12736 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
12738 struct objfile
*objfile
= cu
->objfile
;
12739 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12740 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
12741 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
12743 /* Test "int", "long int", and "long long int" objfile types,
12744 and select the first one having a size above or equal to the
12745 architecture address size. */
12746 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12747 base_type
= int_type
;
12750 int_type
= objfile_type (objfile
)->builtin_long
;
12751 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12752 base_type
= int_type
;
12755 int_type
= objfile_type (objfile
)->builtin_long_long
;
12756 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12757 base_type
= int_type
;
12763 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
12764 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
12765 low
|= negative_mask
;
12766 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
12767 high
|= negative_mask
;
12769 range_type
= create_range_type (NULL
, base_type
, low
, high
);
12771 /* Mark arrays with dynamic length at least as an array of unspecified
12772 length. GDB could check the boundary but before it gets implemented at
12773 least allow accessing the array elements. */
12774 if (attr
&& attr_form_is_block (attr
))
12775 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
12777 /* Ada expects an empty array on no boundary attributes. */
12778 if (attr
== NULL
&& cu
->language
!= language_ada
)
12779 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
12781 name
= dwarf2_name (die
, cu
);
12783 TYPE_NAME (range_type
) = name
;
12785 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12787 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
12789 set_die_type (die
, range_type
, cu
);
12791 /* set_die_type should be already done. */
12792 set_descriptive_type (range_type
, die
, cu
);
12797 static struct type
*
12798 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12802 /* For now, we only support the C meaning of an unspecified type: void. */
12804 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
12805 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
12807 return set_die_type (die
, type
, cu
);
12810 /* Read a single die and all its descendents. Set the die's sibling
12811 field to NULL; set other fields in the die correctly, and set all
12812 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
12813 location of the info_ptr after reading all of those dies. PARENT
12814 is the parent of the die in question. */
12816 static struct die_info
*
12817 read_die_and_children (const struct die_reader_specs
*reader
,
12818 gdb_byte
*info_ptr
,
12819 gdb_byte
**new_info_ptr
,
12820 struct die_info
*parent
)
12822 struct die_info
*die
;
12826 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
12829 *new_info_ptr
= cur_ptr
;
12832 store_in_ref_table (die
, reader
->cu
);
12835 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
12839 *new_info_ptr
= cur_ptr
;
12842 die
->sibling
= NULL
;
12843 die
->parent
= parent
;
12847 /* Read a die, all of its descendents, and all of its siblings; set
12848 all of the fields of all of the dies correctly. Arguments are as
12849 in read_die_and_children. */
12851 static struct die_info
*
12852 read_die_and_siblings (const struct die_reader_specs
*reader
,
12853 gdb_byte
*info_ptr
,
12854 gdb_byte
**new_info_ptr
,
12855 struct die_info
*parent
)
12857 struct die_info
*first_die
, *last_sibling
;
12860 cur_ptr
= info_ptr
;
12861 first_die
= last_sibling
= NULL
;
12865 struct die_info
*die
12866 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
12870 *new_info_ptr
= cur_ptr
;
12877 last_sibling
->sibling
= die
;
12879 last_sibling
= die
;
12883 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
12885 The caller is responsible for filling in the extra attributes
12886 and updating (*DIEP)->num_attrs.
12887 Set DIEP to point to a newly allocated die with its information,
12888 except for its child, sibling, and parent fields.
12889 Set HAS_CHILDREN to tell whether the die has children or not. */
12892 read_full_die_1 (const struct die_reader_specs
*reader
,
12893 struct die_info
**diep
, gdb_byte
*info_ptr
,
12894 int *has_children
, int num_extra_attrs
)
12896 unsigned int abbrev_number
, bytes_read
, i
;
12897 sect_offset offset
;
12898 struct abbrev_info
*abbrev
;
12899 struct die_info
*die
;
12900 struct dwarf2_cu
*cu
= reader
->cu
;
12901 bfd
*abfd
= reader
->abfd
;
12903 offset
.sect_off
= info_ptr
- reader
->buffer
;
12904 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
12905 info_ptr
+= bytes_read
;
12906 if (!abbrev_number
)
12913 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
12915 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
12917 bfd_get_filename (abfd
));
12919 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
12920 die
->offset
= offset
;
12921 die
->tag
= abbrev
->tag
;
12922 die
->abbrev
= abbrev_number
;
12924 /* Make the result usable.
12925 The caller needs to update num_attrs after adding the extra
12927 die
->num_attrs
= abbrev
->num_attrs
;
12929 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
12930 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
12934 *has_children
= abbrev
->has_children
;
12938 /* Read a die and all its attributes.
12939 Set DIEP to point to a newly allocated die with its information,
12940 except for its child, sibling, and parent fields.
12941 Set HAS_CHILDREN to tell whether the die has children or not. */
12944 read_full_die (const struct die_reader_specs
*reader
,
12945 struct die_info
**diep
, gdb_byte
*info_ptr
,
12948 return read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
12951 /* Abbreviation tables.
12953 In DWARF version 2, the description of the debugging information is
12954 stored in a separate .debug_abbrev section. Before we read any
12955 dies from a section we read in all abbreviations and install them
12956 in a hash table. */
12958 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
12960 static struct abbrev_info
*
12961 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
12963 struct abbrev_info
*abbrev
;
12965 abbrev
= (struct abbrev_info
*)
12966 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
12967 memset (abbrev
, 0, sizeof (struct abbrev_info
));
12971 /* Add an abbreviation to the table. */
12974 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
12975 unsigned int abbrev_number
,
12976 struct abbrev_info
*abbrev
)
12978 unsigned int hash_number
;
12980 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
12981 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
12982 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
12985 /* Look up an abbrev in the table.
12986 Returns NULL if the abbrev is not found. */
12988 static struct abbrev_info
*
12989 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
12990 unsigned int abbrev_number
)
12992 unsigned int hash_number
;
12993 struct abbrev_info
*abbrev
;
12995 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
12996 abbrev
= abbrev_table
->abbrevs
[hash_number
];
13000 if (abbrev
->number
== abbrev_number
)
13002 abbrev
= abbrev
->next
;
13007 /* Read in an abbrev table. */
13009 static struct abbrev_table
*
13010 abbrev_table_read_table (struct dwarf2_section_info
*section
,
13011 sect_offset offset
)
13013 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13014 bfd
*abfd
= section
->asection
->owner
;
13015 struct abbrev_table
*abbrev_table
;
13016 gdb_byte
*abbrev_ptr
;
13017 struct abbrev_info
*cur_abbrev
;
13018 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
13019 unsigned int abbrev_form
;
13020 struct attr_abbrev
*cur_attrs
;
13021 unsigned int allocated_attrs
;
13023 abbrev_table
= XMALLOC (struct abbrev_table
);
13024 abbrev_table
->offset
= offset
;
13025 obstack_init (&abbrev_table
->abbrev_obstack
);
13026 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
13028 * sizeof (struct abbrev_info
*)));
13029 memset (abbrev_table
->abbrevs
, 0,
13030 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
13032 dwarf2_read_section (objfile
, section
);
13033 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
13034 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13035 abbrev_ptr
+= bytes_read
;
13037 allocated_attrs
= ATTR_ALLOC_CHUNK
;
13038 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
13040 /* Loop until we reach an abbrev number of 0. */
13041 while (abbrev_number
)
13043 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
13045 /* read in abbrev header */
13046 cur_abbrev
->number
= abbrev_number
;
13047 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13048 abbrev_ptr
+= bytes_read
;
13049 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
13052 /* now read in declarations */
13053 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13054 abbrev_ptr
+= bytes_read
;
13055 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13056 abbrev_ptr
+= bytes_read
;
13057 while (abbrev_name
)
13059 if (cur_abbrev
->num_attrs
== allocated_attrs
)
13061 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
13063 = xrealloc (cur_attrs
, (allocated_attrs
13064 * sizeof (struct attr_abbrev
)));
13067 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
13068 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
13069 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13070 abbrev_ptr
+= bytes_read
;
13071 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13072 abbrev_ptr
+= bytes_read
;
13075 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
13076 (cur_abbrev
->num_attrs
13077 * sizeof (struct attr_abbrev
)));
13078 memcpy (cur_abbrev
->attrs
, cur_attrs
,
13079 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
13081 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
13083 /* Get next abbreviation.
13084 Under Irix6 the abbreviations for a compilation unit are not
13085 always properly terminated with an abbrev number of 0.
13086 Exit loop if we encounter an abbreviation which we have
13087 already read (which means we are about to read the abbreviations
13088 for the next compile unit) or if the end of the abbreviation
13089 table is reached. */
13090 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
13092 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13093 abbrev_ptr
+= bytes_read
;
13094 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
13099 return abbrev_table
;
13102 /* Free the resources held by ABBREV_TABLE. */
13105 abbrev_table_free (struct abbrev_table
*abbrev_table
)
13107 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
13108 xfree (abbrev_table
);
13111 /* Same as abbrev_table_free but as a cleanup.
13112 We pass in a pointer to the pointer to the table so that we can
13113 set the pointer to NULL when we're done. It also simplifies
13114 build_type_unit_groups. */
13117 abbrev_table_free_cleanup (void *table_ptr
)
13119 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
13121 if (*abbrev_table_ptr
!= NULL
)
13122 abbrev_table_free (*abbrev_table_ptr
);
13123 *abbrev_table_ptr
= NULL
;
13126 /* Read the abbrev table for CU from ABBREV_SECTION. */
13129 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
13130 struct dwarf2_section_info
*abbrev_section
)
13133 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
13136 /* Release the memory used by the abbrev table for a compilation unit. */
13139 dwarf2_free_abbrev_table (void *ptr_to_cu
)
13141 struct dwarf2_cu
*cu
= ptr_to_cu
;
13143 abbrev_table_free (cu
->abbrev_table
);
13144 /* Set this to NULL so that we SEGV if we try to read it later,
13145 and also because free_comp_unit verifies this is NULL. */
13146 cu
->abbrev_table
= NULL
;
13149 /* Returns nonzero if TAG represents a type that we might generate a partial
13153 is_type_tag_for_partial (int tag
)
13158 /* Some types that would be reasonable to generate partial symbols for,
13159 that we don't at present. */
13160 case DW_TAG_array_type
:
13161 case DW_TAG_file_type
:
13162 case DW_TAG_ptr_to_member_type
:
13163 case DW_TAG_set_type
:
13164 case DW_TAG_string_type
:
13165 case DW_TAG_subroutine_type
:
13167 case DW_TAG_base_type
:
13168 case DW_TAG_class_type
:
13169 case DW_TAG_interface_type
:
13170 case DW_TAG_enumeration_type
:
13171 case DW_TAG_structure_type
:
13172 case DW_TAG_subrange_type
:
13173 case DW_TAG_typedef
:
13174 case DW_TAG_union_type
:
13181 /* Load all DIEs that are interesting for partial symbols into memory. */
13183 static struct partial_die_info
*
13184 load_partial_dies (const struct die_reader_specs
*reader
,
13185 gdb_byte
*info_ptr
, int building_psymtab
)
13187 struct dwarf2_cu
*cu
= reader
->cu
;
13188 struct objfile
*objfile
= cu
->objfile
;
13189 struct partial_die_info
*part_die
;
13190 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
13191 struct abbrev_info
*abbrev
;
13192 unsigned int bytes_read
;
13193 unsigned int load_all
= 0;
13194 int nesting_level
= 1;
13199 gdb_assert (cu
->per_cu
!= NULL
);
13200 if (cu
->per_cu
->load_all_dies
)
13204 = htab_create_alloc_ex (cu
->header
.length
/ 12,
13208 &cu
->comp_unit_obstack
,
13209 hashtab_obstack_allocate
,
13210 dummy_obstack_deallocate
);
13212 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
13213 sizeof (struct partial_die_info
));
13217 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
13219 /* A NULL abbrev means the end of a series of children. */
13220 if (abbrev
== NULL
)
13222 if (--nesting_level
== 0)
13224 /* PART_DIE was probably the last thing allocated on the
13225 comp_unit_obstack, so we could call obstack_free
13226 here. We don't do that because the waste is small,
13227 and will be cleaned up when we're done with this
13228 compilation unit. This way, we're also more robust
13229 against other users of the comp_unit_obstack. */
13232 info_ptr
+= bytes_read
;
13233 last_die
= parent_die
;
13234 parent_die
= parent_die
->die_parent
;
13238 /* Check for template arguments. We never save these; if
13239 they're seen, we just mark the parent, and go on our way. */
13240 if (parent_die
!= NULL
13241 && cu
->language
== language_cplus
13242 && (abbrev
->tag
== DW_TAG_template_type_param
13243 || abbrev
->tag
== DW_TAG_template_value_param
))
13245 parent_die
->has_template_arguments
= 1;
13249 /* We don't need a partial DIE for the template argument. */
13250 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13255 /* We only recurse into c++ subprograms looking for template arguments.
13256 Skip their other children. */
13258 && cu
->language
== language_cplus
13259 && parent_die
!= NULL
13260 && parent_die
->tag
== DW_TAG_subprogram
)
13262 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13266 /* Check whether this DIE is interesting enough to save. Normally
13267 we would not be interested in members here, but there may be
13268 later variables referencing them via DW_AT_specification (for
13269 static members). */
13271 && !is_type_tag_for_partial (abbrev
->tag
)
13272 && abbrev
->tag
!= DW_TAG_constant
13273 && abbrev
->tag
!= DW_TAG_enumerator
13274 && abbrev
->tag
!= DW_TAG_subprogram
13275 && abbrev
->tag
!= DW_TAG_lexical_block
13276 && abbrev
->tag
!= DW_TAG_variable
13277 && abbrev
->tag
!= DW_TAG_namespace
13278 && abbrev
->tag
!= DW_TAG_module
13279 && abbrev
->tag
!= DW_TAG_member
13280 && abbrev
->tag
!= DW_TAG_imported_unit
)
13282 /* Otherwise we skip to the next sibling, if any. */
13283 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13287 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
13290 /* This two-pass algorithm for processing partial symbols has a
13291 high cost in cache pressure. Thus, handle some simple cases
13292 here which cover the majority of C partial symbols. DIEs
13293 which neither have specification tags in them, nor could have
13294 specification tags elsewhere pointing at them, can simply be
13295 processed and discarded.
13297 This segment is also optional; scan_partial_symbols and
13298 add_partial_symbol will handle these DIEs if we chain
13299 them in normally. When compilers which do not emit large
13300 quantities of duplicate debug information are more common,
13301 this code can probably be removed. */
13303 /* Any complete simple types at the top level (pretty much all
13304 of them, for a language without namespaces), can be processed
13306 if (parent_die
== NULL
13307 && part_die
->has_specification
== 0
13308 && part_die
->is_declaration
== 0
13309 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
13310 || part_die
->tag
== DW_TAG_base_type
13311 || part_die
->tag
== DW_TAG_subrange_type
))
13313 if (building_psymtab
&& part_die
->name
!= NULL
)
13314 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
13315 VAR_DOMAIN
, LOC_TYPEDEF
,
13316 &objfile
->static_psymbols
,
13317 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
13318 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
13322 /* The exception for DW_TAG_typedef with has_children above is
13323 a workaround of GCC PR debug/47510. In the case of this complaint
13324 type_name_no_tag_or_error will error on such types later.
13326 GDB skipped children of DW_TAG_typedef by the shortcut above and then
13327 it could not find the child DIEs referenced later, this is checked
13328 above. In correct DWARF DW_TAG_typedef should have no children. */
13330 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
13331 complaint (&symfile_complaints
,
13332 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
13333 "- DIE at 0x%x [in module %s]"),
13334 part_die
->offset
.sect_off
, objfile
->name
);
13336 /* If we're at the second level, and we're an enumerator, and
13337 our parent has no specification (meaning possibly lives in a
13338 namespace elsewhere), then we can add the partial symbol now
13339 instead of queueing it. */
13340 if (part_die
->tag
== DW_TAG_enumerator
13341 && parent_die
!= NULL
13342 && parent_die
->die_parent
== NULL
13343 && parent_die
->tag
== DW_TAG_enumeration_type
13344 && parent_die
->has_specification
== 0)
13346 if (part_die
->name
== NULL
)
13347 complaint (&symfile_complaints
,
13348 _("malformed enumerator DIE ignored"));
13349 else if (building_psymtab
)
13350 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
13351 VAR_DOMAIN
, LOC_CONST
,
13352 (cu
->language
== language_cplus
13353 || cu
->language
== language_java
)
13354 ? &objfile
->global_psymbols
13355 : &objfile
->static_psymbols
,
13356 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
13358 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
13362 /* We'll save this DIE so link it in. */
13363 part_die
->die_parent
= parent_die
;
13364 part_die
->die_sibling
= NULL
;
13365 part_die
->die_child
= NULL
;
13367 if (last_die
&& last_die
== parent_die
)
13368 last_die
->die_child
= part_die
;
13370 last_die
->die_sibling
= part_die
;
13372 last_die
= part_die
;
13374 if (first_die
== NULL
)
13375 first_die
= part_die
;
13377 /* Maybe add the DIE to the hash table. Not all DIEs that we
13378 find interesting need to be in the hash table, because we
13379 also have the parent/sibling/child chains; only those that we
13380 might refer to by offset later during partial symbol reading.
13382 For now this means things that might have be the target of a
13383 DW_AT_specification, DW_AT_abstract_origin, or
13384 DW_AT_extension. DW_AT_extension will refer only to
13385 namespaces; DW_AT_abstract_origin refers to functions (and
13386 many things under the function DIE, but we do not recurse
13387 into function DIEs during partial symbol reading) and
13388 possibly variables as well; DW_AT_specification refers to
13389 declarations. Declarations ought to have the DW_AT_declaration
13390 flag. It happens that GCC forgets to put it in sometimes, but
13391 only for functions, not for types.
13393 Adding more things than necessary to the hash table is harmless
13394 except for the performance cost. Adding too few will result in
13395 wasted time in find_partial_die, when we reread the compilation
13396 unit with load_all_dies set. */
13399 || abbrev
->tag
== DW_TAG_constant
13400 || abbrev
->tag
== DW_TAG_subprogram
13401 || abbrev
->tag
== DW_TAG_variable
13402 || abbrev
->tag
== DW_TAG_namespace
13403 || part_die
->is_declaration
)
13407 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
13408 part_die
->offset
.sect_off
, INSERT
);
13412 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
13413 sizeof (struct partial_die_info
));
13415 /* For some DIEs we want to follow their children (if any). For C
13416 we have no reason to follow the children of structures; for other
13417 languages we have to, so that we can get at method physnames
13418 to infer fully qualified class names, for DW_AT_specification,
13419 and for C++ template arguments. For C++, we also look one level
13420 inside functions to find template arguments (if the name of the
13421 function does not already contain the template arguments).
13423 For Ada, we need to scan the children of subprograms and lexical
13424 blocks as well because Ada allows the definition of nested
13425 entities that could be interesting for the debugger, such as
13426 nested subprograms for instance. */
13427 if (last_die
->has_children
13429 || last_die
->tag
== DW_TAG_namespace
13430 || last_die
->tag
== DW_TAG_module
13431 || last_die
->tag
== DW_TAG_enumeration_type
13432 || (cu
->language
== language_cplus
13433 && last_die
->tag
== DW_TAG_subprogram
13434 && (last_die
->name
== NULL
13435 || strchr (last_die
->name
, '<') == NULL
))
13436 || (cu
->language
!= language_c
13437 && (last_die
->tag
== DW_TAG_class_type
13438 || last_die
->tag
== DW_TAG_interface_type
13439 || last_die
->tag
== DW_TAG_structure_type
13440 || last_die
->tag
== DW_TAG_union_type
))
13441 || (cu
->language
== language_ada
13442 && (last_die
->tag
== DW_TAG_subprogram
13443 || last_die
->tag
== DW_TAG_lexical_block
))))
13446 parent_die
= last_die
;
13450 /* Otherwise we skip to the next sibling, if any. */
13451 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
13453 /* Back to the top, do it again. */
13457 /* Read a minimal amount of information into the minimal die structure. */
13460 read_partial_die (const struct die_reader_specs
*reader
,
13461 struct partial_die_info
*part_die
,
13462 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
13463 gdb_byte
*info_ptr
)
13465 struct dwarf2_cu
*cu
= reader
->cu
;
13466 struct objfile
*objfile
= cu
->objfile
;
13467 gdb_byte
*buffer
= reader
->buffer
;
13469 struct attribute attr
;
13470 int has_low_pc_attr
= 0;
13471 int has_high_pc_attr
= 0;
13472 int high_pc_relative
= 0;
13474 memset (part_die
, 0, sizeof (struct partial_die_info
));
13476 part_die
->offset
.sect_off
= info_ptr
- buffer
;
13478 info_ptr
+= abbrev_len
;
13480 if (abbrev
== NULL
)
13483 part_die
->tag
= abbrev
->tag
;
13484 part_die
->has_children
= abbrev
->has_children
;
13486 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
13488 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
13490 /* Store the data if it is of an attribute we want to keep in a
13491 partial symbol table. */
13495 switch (part_die
->tag
)
13497 case DW_TAG_compile_unit
:
13498 case DW_TAG_partial_unit
:
13499 case DW_TAG_type_unit
:
13500 /* Compilation units have a DW_AT_name that is a filename, not
13501 a source language identifier. */
13502 case DW_TAG_enumeration_type
:
13503 case DW_TAG_enumerator
:
13504 /* These tags always have simple identifiers already; no need
13505 to canonicalize them. */
13506 part_die
->name
= DW_STRING (&attr
);
13510 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
13511 &objfile
->objfile_obstack
);
13515 case DW_AT_linkage_name
:
13516 case DW_AT_MIPS_linkage_name
:
13517 /* Note that both forms of linkage name might appear. We
13518 assume they will be the same, and we only store the last
13520 if (cu
->language
== language_ada
)
13521 part_die
->name
= DW_STRING (&attr
);
13522 part_die
->linkage_name
= DW_STRING (&attr
);
13525 has_low_pc_attr
= 1;
13526 part_die
->lowpc
= DW_ADDR (&attr
);
13528 case DW_AT_high_pc
:
13529 has_high_pc_attr
= 1;
13530 if (attr
.form
== DW_FORM_addr
13531 || attr
.form
== DW_FORM_GNU_addr_index
)
13532 part_die
->highpc
= DW_ADDR (&attr
);
13535 high_pc_relative
= 1;
13536 part_die
->highpc
= DW_UNSND (&attr
);
13539 case DW_AT_location
:
13540 /* Support the .debug_loc offsets. */
13541 if (attr_form_is_block (&attr
))
13543 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
13545 else if (attr_form_is_section_offset (&attr
))
13547 dwarf2_complex_location_expr_complaint ();
13551 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13552 "partial symbol information");
13555 case DW_AT_external
:
13556 part_die
->is_external
= DW_UNSND (&attr
);
13558 case DW_AT_declaration
:
13559 part_die
->is_declaration
= DW_UNSND (&attr
);
13562 part_die
->has_type
= 1;
13564 case DW_AT_abstract_origin
:
13565 case DW_AT_specification
:
13566 case DW_AT_extension
:
13567 part_die
->has_specification
= 1;
13568 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
13569 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
13570 || cu
->per_cu
->is_dwz
);
13572 case DW_AT_sibling
:
13573 /* Ignore absolute siblings, they might point outside of
13574 the current compile unit. */
13575 if (attr
.form
== DW_FORM_ref_addr
)
13576 complaint (&symfile_complaints
,
13577 _("ignoring absolute DW_AT_sibling"));
13579 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
13581 case DW_AT_byte_size
:
13582 part_die
->has_byte_size
= 1;
13584 case DW_AT_calling_convention
:
13585 /* DWARF doesn't provide a way to identify a program's source-level
13586 entry point. DW_AT_calling_convention attributes are only meant
13587 to describe functions' calling conventions.
13589 However, because it's a necessary piece of information in
13590 Fortran, and because DW_CC_program is the only piece of debugging
13591 information whose definition refers to a 'main program' at all,
13592 several compilers have begun marking Fortran main programs with
13593 DW_CC_program --- even when those functions use the standard
13594 calling conventions.
13596 So until DWARF specifies a way to provide this information and
13597 compilers pick up the new representation, we'll support this
13599 if (DW_UNSND (&attr
) == DW_CC_program
13600 && cu
->language
== language_fortran
)
13602 set_main_name (part_die
->name
);
13604 /* As this DIE has a static linkage the name would be difficult
13605 to look up later. */
13606 language_of_main
= language_fortran
;
13610 if (DW_UNSND (&attr
) == DW_INL_inlined
13611 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
13612 part_die
->may_be_inlined
= 1;
13616 if (part_die
->tag
== DW_TAG_imported_unit
)
13618 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
13619 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
13620 || cu
->per_cu
->is_dwz
);
13629 if (high_pc_relative
)
13630 part_die
->highpc
+= part_die
->lowpc
;
13632 if (has_low_pc_attr
&& has_high_pc_attr
)
13634 /* When using the GNU linker, .gnu.linkonce. sections are used to
13635 eliminate duplicate copies of functions and vtables and such.
13636 The linker will arbitrarily choose one and discard the others.
13637 The AT_*_pc values for such functions refer to local labels in
13638 these sections. If the section from that file was discarded, the
13639 labels are not in the output, so the relocs get a value of 0.
13640 If this is a discarded function, mark the pc bounds as invalid,
13641 so that GDB will ignore it. */
13642 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
13644 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13646 complaint (&symfile_complaints
,
13647 _("DW_AT_low_pc %s is zero "
13648 "for DIE at 0x%x [in module %s]"),
13649 paddress (gdbarch
, part_die
->lowpc
),
13650 part_die
->offset
.sect_off
, objfile
->name
);
13652 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
13653 else if (part_die
->lowpc
>= part_die
->highpc
)
13655 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13657 complaint (&symfile_complaints
,
13658 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
13659 "for DIE at 0x%x [in module %s]"),
13660 paddress (gdbarch
, part_die
->lowpc
),
13661 paddress (gdbarch
, part_die
->highpc
),
13662 part_die
->offset
.sect_off
, objfile
->name
);
13665 part_die
->has_pc_info
= 1;
13671 /* Find a cached partial DIE at OFFSET in CU. */
13673 static struct partial_die_info
*
13674 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
13676 struct partial_die_info
*lookup_die
= NULL
;
13677 struct partial_die_info part_die
;
13679 part_die
.offset
= offset
;
13680 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
13686 /* Find a partial DIE at OFFSET, which may or may not be in CU,
13687 except in the case of .debug_types DIEs which do not reference
13688 outside their CU (they do however referencing other types via
13689 DW_FORM_ref_sig8). */
13691 static struct partial_die_info
*
13692 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
13694 struct objfile
*objfile
= cu
->objfile
;
13695 struct dwarf2_per_cu_data
*per_cu
= NULL
;
13696 struct partial_die_info
*pd
= NULL
;
13698 if (offset_in_dwz
== cu
->per_cu
->is_dwz
13699 && offset_in_cu_p (&cu
->header
, offset
))
13701 pd
= find_partial_die_in_comp_unit (offset
, cu
);
13704 /* We missed recording what we needed.
13705 Load all dies and try again. */
13706 per_cu
= cu
->per_cu
;
13710 /* TUs don't reference other CUs/TUs (except via type signatures). */
13711 if (cu
->per_cu
->is_debug_types
)
13713 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
13714 " external reference to offset 0x%lx [in module %s].\n"),
13715 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
13716 bfd_get_filename (objfile
->obfd
));
13718 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
13721 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
13722 load_partial_comp_unit (per_cu
);
13724 per_cu
->cu
->last_used
= 0;
13725 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
13728 /* If we didn't find it, and not all dies have been loaded,
13729 load them all and try again. */
13731 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
13733 per_cu
->load_all_dies
= 1;
13735 /* This is nasty. When we reread the DIEs, somewhere up the call chain
13736 THIS_CU->cu may already be in use. So we can't just free it and
13737 replace its DIEs with the ones we read in. Instead, we leave those
13738 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
13739 and clobber THIS_CU->cu->partial_dies with the hash table for the new
13741 load_partial_comp_unit (per_cu
);
13743 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
13747 internal_error (__FILE__
, __LINE__
,
13748 _("could not find partial DIE 0x%x "
13749 "in cache [from module %s]\n"),
13750 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
13754 /* See if we can figure out if the class lives in a namespace. We do
13755 this by looking for a member function; its demangled name will
13756 contain namespace info, if there is any. */
13759 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
13760 struct dwarf2_cu
*cu
)
13762 /* NOTE: carlton/2003-10-07: Getting the info this way changes
13763 what template types look like, because the demangler
13764 frequently doesn't give the same name as the debug info. We
13765 could fix this by only using the demangled name to get the
13766 prefix (but see comment in read_structure_type). */
13768 struct partial_die_info
*real_pdi
;
13769 struct partial_die_info
*child_pdi
;
13771 /* If this DIE (this DIE's specification, if any) has a parent, then
13772 we should not do this. We'll prepend the parent's fully qualified
13773 name when we create the partial symbol. */
13775 real_pdi
= struct_pdi
;
13776 while (real_pdi
->has_specification
)
13777 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
13778 real_pdi
->spec_is_dwz
, cu
);
13780 if (real_pdi
->die_parent
!= NULL
)
13783 for (child_pdi
= struct_pdi
->die_child
;
13785 child_pdi
= child_pdi
->die_sibling
)
13787 if (child_pdi
->tag
== DW_TAG_subprogram
13788 && child_pdi
->linkage_name
!= NULL
)
13790 char *actual_class_name
13791 = language_class_name_from_physname (cu
->language_defn
,
13792 child_pdi
->linkage_name
);
13793 if (actual_class_name
!= NULL
)
13796 = obsavestring (actual_class_name
,
13797 strlen (actual_class_name
),
13798 &cu
->objfile
->objfile_obstack
);
13799 xfree (actual_class_name
);
13806 /* Adjust PART_DIE before generating a symbol for it. This function
13807 may set the is_external flag or change the DIE's name. */
13810 fixup_partial_die (struct partial_die_info
*part_die
,
13811 struct dwarf2_cu
*cu
)
13813 /* Once we've fixed up a die, there's no point in doing so again.
13814 This also avoids a memory leak if we were to call
13815 guess_partial_die_structure_name multiple times. */
13816 if (part_die
->fixup_called
)
13819 /* If we found a reference attribute and the DIE has no name, try
13820 to find a name in the referred to DIE. */
13822 if (part_die
->name
== NULL
&& part_die
->has_specification
)
13824 struct partial_die_info
*spec_die
;
13826 spec_die
= find_partial_die (part_die
->spec_offset
,
13827 part_die
->spec_is_dwz
, cu
);
13829 fixup_partial_die (spec_die
, cu
);
13831 if (spec_die
->name
)
13833 part_die
->name
= spec_die
->name
;
13835 /* Copy DW_AT_external attribute if it is set. */
13836 if (spec_die
->is_external
)
13837 part_die
->is_external
= spec_die
->is_external
;
13841 /* Set default names for some unnamed DIEs. */
13843 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
13844 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
13846 /* If there is no parent die to provide a namespace, and there are
13847 children, see if we can determine the namespace from their linkage
13849 if (cu
->language
== language_cplus
13850 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
13851 && part_die
->die_parent
== NULL
13852 && part_die
->has_children
13853 && (part_die
->tag
== DW_TAG_class_type
13854 || part_die
->tag
== DW_TAG_structure_type
13855 || part_die
->tag
== DW_TAG_union_type
))
13856 guess_partial_die_structure_name (part_die
, cu
);
13858 /* GCC might emit a nameless struct or union that has a linkage
13859 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
13860 if (part_die
->name
== NULL
13861 && (part_die
->tag
== DW_TAG_class_type
13862 || part_die
->tag
== DW_TAG_interface_type
13863 || part_die
->tag
== DW_TAG_structure_type
13864 || part_die
->tag
== DW_TAG_union_type
)
13865 && part_die
->linkage_name
!= NULL
)
13869 demangled
= cplus_demangle (part_die
->linkage_name
, DMGL_TYPES
);
13874 /* Strip any leading namespaces/classes, keep only the base name.
13875 DW_AT_name for named DIEs does not contain the prefixes. */
13876 base
= strrchr (demangled
, ':');
13877 if (base
&& base
> demangled
&& base
[-1] == ':')
13882 part_die
->name
= obsavestring (base
, strlen (base
),
13883 &cu
->objfile
->objfile_obstack
);
13888 part_die
->fixup_called
= 1;
13891 /* Read an attribute value described by an attribute form. */
13894 read_attribute_value (const struct die_reader_specs
*reader
,
13895 struct attribute
*attr
, unsigned form
,
13896 gdb_byte
*info_ptr
)
13898 struct dwarf2_cu
*cu
= reader
->cu
;
13899 bfd
*abfd
= reader
->abfd
;
13900 struct comp_unit_head
*cu_header
= &cu
->header
;
13901 unsigned int bytes_read
;
13902 struct dwarf_block
*blk
;
13907 case DW_FORM_ref_addr
:
13908 if (cu
->header
.version
== 2)
13909 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
13911 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
13912 &cu
->header
, &bytes_read
);
13913 info_ptr
+= bytes_read
;
13915 case DW_FORM_GNU_ref_alt
:
13916 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
13917 info_ptr
+= bytes_read
;
13920 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
13921 info_ptr
+= bytes_read
;
13923 case DW_FORM_block2
:
13924 blk
= dwarf_alloc_block (cu
);
13925 blk
->size
= read_2_bytes (abfd
, info_ptr
);
13927 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
13928 info_ptr
+= blk
->size
;
13929 DW_BLOCK (attr
) = blk
;
13931 case DW_FORM_block4
:
13932 blk
= dwarf_alloc_block (cu
);
13933 blk
->size
= read_4_bytes (abfd
, info_ptr
);
13935 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
13936 info_ptr
+= blk
->size
;
13937 DW_BLOCK (attr
) = blk
;
13939 case DW_FORM_data2
:
13940 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
13943 case DW_FORM_data4
:
13944 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
13947 case DW_FORM_data8
:
13948 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
13951 case DW_FORM_sec_offset
:
13952 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
13953 info_ptr
+= bytes_read
;
13955 case DW_FORM_string
:
13956 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
13957 DW_STRING_IS_CANONICAL (attr
) = 0;
13958 info_ptr
+= bytes_read
;
13961 if (!cu
->per_cu
->is_dwz
)
13963 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
13965 DW_STRING_IS_CANONICAL (attr
) = 0;
13966 info_ptr
+= bytes_read
;
13970 case DW_FORM_GNU_strp_alt
:
13972 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
13973 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
13976 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
13977 DW_STRING_IS_CANONICAL (attr
) = 0;
13978 info_ptr
+= bytes_read
;
13981 case DW_FORM_exprloc
:
13982 case DW_FORM_block
:
13983 blk
= dwarf_alloc_block (cu
);
13984 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
13985 info_ptr
+= bytes_read
;
13986 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
13987 info_ptr
+= blk
->size
;
13988 DW_BLOCK (attr
) = blk
;
13990 case DW_FORM_block1
:
13991 blk
= dwarf_alloc_block (cu
);
13992 blk
->size
= read_1_byte (abfd
, info_ptr
);
13994 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
13995 info_ptr
+= blk
->size
;
13996 DW_BLOCK (attr
) = blk
;
13998 case DW_FORM_data1
:
13999 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
14003 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
14006 case DW_FORM_flag_present
:
14007 DW_UNSND (attr
) = 1;
14009 case DW_FORM_sdata
:
14010 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
14011 info_ptr
+= bytes_read
;
14013 case DW_FORM_udata
:
14014 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14015 info_ptr
+= bytes_read
;
14018 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14019 + read_1_byte (abfd
, info_ptr
));
14023 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14024 + read_2_bytes (abfd
, info_ptr
));
14028 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14029 + read_4_bytes (abfd
, info_ptr
));
14033 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14034 + read_8_bytes (abfd
, info_ptr
));
14037 case DW_FORM_ref_sig8
:
14038 /* Convert the signature to something we can record in DW_UNSND
14040 NOTE: This is NULL if the type wasn't found. */
14041 DW_SIGNATURED_TYPE (attr
) =
14042 lookup_signatured_type (read_8_bytes (abfd
, info_ptr
));
14045 case DW_FORM_ref_udata
:
14046 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14047 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
14048 info_ptr
+= bytes_read
;
14050 case DW_FORM_indirect
:
14051 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14052 info_ptr
+= bytes_read
;
14053 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
14055 case DW_FORM_GNU_addr_index
:
14056 if (reader
->dwo_file
== NULL
)
14058 /* For now flag a hard error.
14059 Later we can turn this into a complaint. */
14060 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
14061 dwarf_form_name (form
),
14062 bfd_get_filename (abfd
));
14064 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
14065 info_ptr
+= bytes_read
;
14067 case DW_FORM_GNU_str_index
:
14068 if (reader
->dwo_file
== NULL
)
14070 /* For now flag a hard error.
14071 Later we can turn this into a complaint if warranted. */
14072 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
14073 dwarf_form_name (form
),
14074 bfd_get_filename (abfd
));
14077 ULONGEST str_index
=
14078 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14080 DW_STRING (attr
) = read_str_index (reader
, cu
, str_index
);
14081 DW_STRING_IS_CANONICAL (attr
) = 0;
14082 info_ptr
+= bytes_read
;
14086 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
14087 dwarf_form_name (form
),
14088 bfd_get_filename (abfd
));
14092 if (cu
->per_cu
->is_dwz
&& is_ref_attr (attr
))
14093 attr
->form
= DW_FORM_GNU_ref_alt
;
14095 /* We have seen instances where the compiler tried to emit a byte
14096 size attribute of -1 which ended up being encoded as an unsigned
14097 0xffffffff. Although 0xffffffff is technically a valid size value,
14098 an object of this size seems pretty unlikely so we can relatively
14099 safely treat these cases as if the size attribute was invalid and
14100 treat them as zero by default. */
14101 if (attr
->name
== DW_AT_byte_size
14102 && form
== DW_FORM_data4
14103 && DW_UNSND (attr
) >= 0xffffffff)
14106 (&symfile_complaints
,
14107 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
14108 hex_string (DW_UNSND (attr
)));
14109 DW_UNSND (attr
) = 0;
14115 /* Read an attribute described by an abbreviated attribute. */
14118 read_attribute (const struct die_reader_specs
*reader
,
14119 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
14120 gdb_byte
*info_ptr
)
14122 attr
->name
= abbrev
->name
;
14123 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
14126 /* Read dwarf information from a buffer. */
14128 static unsigned int
14129 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
14131 return bfd_get_8 (abfd
, buf
);
14135 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
14137 return bfd_get_signed_8 (abfd
, buf
);
14140 static unsigned int
14141 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14143 return bfd_get_16 (abfd
, buf
);
14147 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14149 return bfd_get_signed_16 (abfd
, buf
);
14152 static unsigned int
14153 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14155 return bfd_get_32 (abfd
, buf
);
14159 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14161 return bfd_get_signed_32 (abfd
, buf
);
14165 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14167 return bfd_get_64 (abfd
, buf
);
14171 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
14172 unsigned int *bytes_read
)
14174 struct comp_unit_head
*cu_header
= &cu
->header
;
14175 CORE_ADDR retval
= 0;
14177 if (cu_header
->signed_addr_p
)
14179 switch (cu_header
->addr_size
)
14182 retval
= bfd_get_signed_16 (abfd
, buf
);
14185 retval
= bfd_get_signed_32 (abfd
, buf
);
14188 retval
= bfd_get_signed_64 (abfd
, buf
);
14191 internal_error (__FILE__
, __LINE__
,
14192 _("read_address: bad switch, signed [in module %s]"),
14193 bfd_get_filename (abfd
));
14198 switch (cu_header
->addr_size
)
14201 retval
= bfd_get_16 (abfd
, buf
);
14204 retval
= bfd_get_32 (abfd
, buf
);
14207 retval
= bfd_get_64 (abfd
, buf
);
14210 internal_error (__FILE__
, __LINE__
,
14211 _("read_address: bad switch, "
14212 "unsigned [in module %s]"),
14213 bfd_get_filename (abfd
));
14217 *bytes_read
= cu_header
->addr_size
;
14221 /* Read the initial length from a section. The (draft) DWARF 3
14222 specification allows the initial length to take up either 4 bytes
14223 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
14224 bytes describe the length and all offsets will be 8 bytes in length
14227 An older, non-standard 64-bit format is also handled by this
14228 function. The older format in question stores the initial length
14229 as an 8-byte quantity without an escape value. Lengths greater
14230 than 2^32 aren't very common which means that the initial 4 bytes
14231 is almost always zero. Since a length value of zero doesn't make
14232 sense for the 32-bit format, this initial zero can be considered to
14233 be an escape value which indicates the presence of the older 64-bit
14234 format. As written, the code can't detect (old format) lengths
14235 greater than 4GB. If it becomes necessary to handle lengths
14236 somewhat larger than 4GB, we could allow other small values (such
14237 as the non-sensical values of 1, 2, and 3) to also be used as
14238 escape values indicating the presence of the old format.
14240 The value returned via bytes_read should be used to increment the
14241 relevant pointer after calling read_initial_length().
14243 [ Note: read_initial_length() and read_offset() are based on the
14244 document entitled "DWARF Debugging Information Format", revision
14245 3, draft 8, dated November 19, 2001. This document was obtained
14248 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
14250 This document is only a draft and is subject to change. (So beware.)
14252 Details regarding the older, non-standard 64-bit format were
14253 determined empirically by examining 64-bit ELF files produced by
14254 the SGI toolchain on an IRIX 6.5 machine.
14256 - Kevin, July 16, 2002
14260 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
14262 LONGEST length
= bfd_get_32 (abfd
, buf
);
14264 if (length
== 0xffffffff)
14266 length
= bfd_get_64 (abfd
, buf
+ 4);
14269 else if (length
== 0)
14271 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
14272 length
= bfd_get_64 (abfd
, buf
);
14283 /* Cover function for read_initial_length.
14284 Returns the length of the object at BUF, and stores the size of the
14285 initial length in *BYTES_READ and stores the size that offsets will be in
14287 If the initial length size is not equivalent to that specified in
14288 CU_HEADER then issue a complaint.
14289 This is useful when reading non-comp-unit headers. */
14292 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
14293 const struct comp_unit_head
*cu_header
,
14294 unsigned int *bytes_read
,
14295 unsigned int *offset_size
)
14297 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
14299 gdb_assert (cu_header
->initial_length_size
== 4
14300 || cu_header
->initial_length_size
== 8
14301 || cu_header
->initial_length_size
== 12);
14303 if (cu_header
->initial_length_size
!= *bytes_read
)
14304 complaint (&symfile_complaints
,
14305 _("intermixed 32-bit and 64-bit DWARF sections"));
14307 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
14311 /* Read an offset from the data stream. The size of the offset is
14312 given by cu_header->offset_size. */
14315 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
14316 unsigned int *bytes_read
)
14318 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
14320 *bytes_read
= cu_header
->offset_size
;
14324 /* Read an offset from the data stream. */
14327 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
14329 LONGEST retval
= 0;
14331 switch (offset_size
)
14334 retval
= bfd_get_32 (abfd
, buf
);
14337 retval
= bfd_get_64 (abfd
, buf
);
14340 internal_error (__FILE__
, __LINE__
,
14341 _("read_offset_1: bad switch [in module %s]"),
14342 bfd_get_filename (abfd
));
14349 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
14351 /* If the size of a host char is 8 bits, we can return a pointer
14352 to the buffer, otherwise we have to copy the data to a buffer
14353 allocated on the temporary obstack. */
14354 gdb_assert (HOST_CHAR_BIT
== 8);
14359 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14361 /* If the size of a host char is 8 bits, we can return a pointer
14362 to the string, otherwise we have to copy the string to a buffer
14363 allocated on the temporary obstack. */
14364 gdb_assert (HOST_CHAR_BIT
== 8);
14367 *bytes_read_ptr
= 1;
14370 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
14371 return (char *) buf
;
14375 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
14377 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
14378 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
14379 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
14380 bfd_get_filename (abfd
));
14381 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
14382 error (_("DW_FORM_strp pointing outside of "
14383 ".debug_str section [in module %s]"),
14384 bfd_get_filename (abfd
));
14385 gdb_assert (HOST_CHAR_BIT
== 8);
14386 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
14388 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
14391 /* Read a string at offset STR_OFFSET in the .debug_str section from
14392 the .dwz file DWZ. Throw an error if the offset is too large. If
14393 the string consists of a single NUL byte, return NULL; otherwise
14394 return a pointer to the string. */
14397 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
14399 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
14401 if (dwz
->str
.buffer
== NULL
)
14402 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
14403 "section [in module %s]"),
14404 bfd_get_filename (dwz
->dwz_bfd
));
14405 if (str_offset
>= dwz
->str
.size
)
14406 error (_("DW_FORM_GNU_strp_alt pointing outside of "
14407 ".debug_str section [in module %s]"),
14408 bfd_get_filename (dwz
->dwz_bfd
));
14409 gdb_assert (HOST_CHAR_BIT
== 8);
14410 if (dwz
->str
.buffer
[str_offset
] == '\0')
14412 return (char *) (dwz
->str
.buffer
+ str_offset
);
14416 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
14417 const struct comp_unit_head
*cu_header
,
14418 unsigned int *bytes_read_ptr
)
14420 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
14422 return read_indirect_string_at_offset (abfd
, str_offset
);
14426 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14429 unsigned int num_read
;
14431 unsigned char byte
;
14439 byte
= bfd_get_8 (abfd
, buf
);
14442 result
|= ((ULONGEST
) (byte
& 127) << shift
);
14443 if ((byte
& 128) == 0)
14449 *bytes_read_ptr
= num_read
;
14454 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14457 int i
, shift
, num_read
;
14458 unsigned char byte
;
14466 byte
= bfd_get_8 (abfd
, buf
);
14469 result
|= ((LONGEST
) (byte
& 127) << shift
);
14471 if ((byte
& 128) == 0)
14476 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
14477 result
|= -(((LONGEST
) 1) << shift
);
14478 *bytes_read_ptr
= num_read
;
14482 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
14483 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
14484 ADDR_SIZE is the size of addresses from the CU header. */
14487 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
14489 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14490 bfd
*abfd
= objfile
->obfd
;
14491 const gdb_byte
*info_ptr
;
14493 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
14494 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
14495 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
14497 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
14498 error (_("DW_FORM_addr_index pointing outside of "
14499 ".debug_addr section [in module %s]"),
14501 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
14502 + addr_base
+ addr_index
* addr_size
);
14503 if (addr_size
== 4)
14504 return bfd_get_32 (abfd
, info_ptr
);
14506 return bfd_get_64 (abfd
, info_ptr
);
14509 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
14512 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
14514 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
14517 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
14520 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, gdb_byte
*info_ptr
,
14521 unsigned int *bytes_read
)
14523 bfd
*abfd
= cu
->objfile
->obfd
;
14524 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
14526 return read_addr_index (cu
, addr_index
);
14529 /* Data structure to pass results from dwarf2_read_addr_index_reader
14530 back to dwarf2_read_addr_index. */
14532 struct dwarf2_read_addr_index_data
14534 ULONGEST addr_base
;
14538 /* die_reader_func for dwarf2_read_addr_index. */
14541 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
14542 gdb_byte
*info_ptr
,
14543 struct die_info
*comp_unit_die
,
14547 struct dwarf2_cu
*cu
= reader
->cu
;
14548 struct dwarf2_read_addr_index_data
*aidata
=
14549 (struct dwarf2_read_addr_index_data
*) data
;
14551 aidata
->addr_base
= cu
->addr_base
;
14552 aidata
->addr_size
= cu
->header
.addr_size
;
14555 /* Given an index in .debug_addr, fetch the value.
14556 NOTE: This can be called during dwarf expression evaluation,
14557 long after the debug information has been read, and thus per_cu->cu
14558 may no longer exist. */
14561 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
14562 unsigned int addr_index
)
14564 struct objfile
*objfile
= per_cu
->objfile
;
14565 struct dwarf2_cu
*cu
= per_cu
->cu
;
14566 ULONGEST addr_base
;
14569 /* This is intended to be called from outside this file. */
14570 dw2_setup (objfile
);
14572 /* We need addr_base and addr_size.
14573 If we don't have PER_CU->cu, we have to get it.
14574 Nasty, but the alternative is storing the needed info in PER_CU,
14575 which at this point doesn't seem justified: it's not clear how frequently
14576 it would get used and it would increase the size of every PER_CU.
14577 Entry points like dwarf2_per_cu_addr_size do a similar thing
14578 so we're not in uncharted territory here.
14579 Alas we need to be a bit more complicated as addr_base is contained
14582 We don't need to read the entire CU(/TU).
14583 We just need the header and top level die.
14585 IWBN to use the aging mechanism to let us lazily later discard the CU.
14586 For now we skip this optimization. */
14590 addr_base
= cu
->addr_base
;
14591 addr_size
= cu
->header
.addr_size
;
14595 struct dwarf2_read_addr_index_data aidata
;
14597 /* Note: We can't use init_cutu_and_read_dies_simple here,
14598 we need addr_base. */
14599 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
14600 dwarf2_read_addr_index_reader
, &aidata
);
14601 addr_base
= aidata
.addr_base
;
14602 addr_size
= aidata
.addr_size
;
14605 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
14608 /* Given a DW_AT_str_index, fetch the string. */
14611 read_str_index (const struct die_reader_specs
*reader
,
14612 struct dwarf2_cu
*cu
, ULONGEST str_index
)
14614 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14615 const char *dwo_name
= objfile
->name
;
14616 bfd
*abfd
= objfile
->obfd
;
14617 struct dwo_sections
*sections
= &reader
->dwo_file
->sections
;
14618 gdb_byte
*info_ptr
;
14619 ULONGEST str_offset
;
14621 dwarf2_read_section (objfile
, §ions
->str
);
14622 dwarf2_read_section (objfile
, §ions
->str_offsets
);
14623 if (sections
->str
.buffer
== NULL
)
14624 error (_("DW_FORM_str_index used without .debug_str.dwo section"
14625 " in CU at offset 0x%lx [in module %s]"),
14626 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14627 if (sections
->str_offsets
.buffer
== NULL
)
14628 error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section"
14629 " in CU at offset 0x%lx [in module %s]"),
14630 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14631 if (str_index
* cu
->header
.offset_size
>= sections
->str_offsets
.size
)
14632 error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo"
14633 " section in CU at offset 0x%lx [in module %s]"),
14634 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14635 info_ptr
= (sections
->str_offsets
.buffer
14636 + str_index
* cu
->header
.offset_size
);
14637 if (cu
->header
.offset_size
== 4)
14638 str_offset
= bfd_get_32 (abfd
, info_ptr
);
14640 str_offset
= bfd_get_64 (abfd
, info_ptr
);
14641 if (str_offset
>= sections
->str
.size
)
14642 error (_("Offset from DW_FORM_str_index pointing outside of"
14643 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
14644 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14645 return (char *) (sections
->str
.buffer
+ str_offset
);
14648 /* Return the length of an LEB128 number in BUF. */
14651 leb128_size (const gdb_byte
*buf
)
14653 const gdb_byte
*begin
= buf
;
14659 if ((byte
& 128) == 0)
14660 return buf
- begin
;
14665 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
14672 cu
->language
= language_c
;
14674 case DW_LANG_C_plus_plus
:
14675 cu
->language
= language_cplus
;
14678 cu
->language
= language_d
;
14680 case DW_LANG_Fortran77
:
14681 case DW_LANG_Fortran90
:
14682 case DW_LANG_Fortran95
:
14683 cu
->language
= language_fortran
;
14686 cu
->language
= language_go
;
14688 case DW_LANG_Mips_Assembler
:
14689 cu
->language
= language_asm
;
14692 cu
->language
= language_java
;
14694 case DW_LANG_Ada83
:
14695 case DW_LANG_Ada95
:
14696 cu
->language
= language_ada
;
14698 case DW_LANG_Modula2
:
14699 cu
->language
= language_m2
;
14701 case DW_LANG_Pascal83
:
14702 cu
->language
= language_pascal
;
14705 cu
->language
= language_objc
;
14707 case DW_LANG_Cobol74
:
14708 case DW_LANG_Cobol85
:
14710 cu
->language
= language_minimal
;
14713 cu
->language_defn
= language_def (cu
->language
);
14716 /* Return the named attribute or NULL if not there. */
14718 static struct attribute
*
14719 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
14724 struct attribute
*spec
= NULL
;
14726 for (i
= 0; i
< die
->num_attrs
; ++i
)
14728 if (die
->attrs
[i
].name
== name
)
14729 return &die
->attrs
[i
];
14730 if (die
->attrs
[i
].name
== DW_AT_specification
14731 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
14732 spec
= &die
->attrs
[i
];
14738 die
= follow_die_ref (die
, spec
, &cu
);
14744 /* Return the named attribute or NULL if not there,
14745 but do not follow DW_AT_specification, etc.
14746 This is for use in contexts where we're reading .debug_types dies.
14747 Following DW_AT_specification, DW_AT_abstract_origin will take us
14748 back up the chain, and we want to go down. */
14750 static struct attribute
*
14751 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
14755 for (i
= 0; i
< die
->num_attrs
; ++i
)
14756 if (die
->attrs
[i
].name
== name
)
14757 return &die
->attrs
[i
];
14762 /* Return non-zero iff the attribute NAME is defined for the given DIE,
14763 and holds a non-zero value. This function should only be used for
14764 DW_FORM_flag or DW_FORM_flag_present attributes. */
14767 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
14769 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
14771 return (attr
&& DW_UNSND (attr
));
14775 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
14777 /* A DIE is a declaration if it has a DW_AT_declaration attribute
14778 which value is non-zero. However, we have to be careful with
14779 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
14780 (via dwarf2_flag_true_p) follows this attribute. So we may
14781 end up accidently finding a declaration attribute that belongs
14782 to a different DIE referenced by the specification attribute,
14783 even though the given DIE does not have a declaration attribute. */
14784 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
14785 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
14788 /* Return the die giving the specification for DIE, if there is
14789 one. *SPEC_CU is the CU containing DIE on input, and the CU
14790 containing the return value on output. If there is no
14791 specification, but there is an abstract origin, that is
14794 static struct die_info
*
14795 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
14797 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
14800 if (spec_attr
== NULL
)
14801 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
14803 if (spec_attr
== NULL
)
14806 return follow_die_ref (die
, spec_attr
, spec_cu
);
14809 /* Free the line_header structure *LH, and any arrays and strings it
14811 NOTE: This is also used as a "cleanup" function. */
14814 free_line_header (struct line_header
*lh
)
14816 if (lh
->standard_opcode_lengths
)
14817 xfree (lh
->standard_opcode_lengths
);
14819 /* Remember that all the lh->file_names[i].name pointers are
14820 pointers into debug_line_buffer, and don't need to be freed. */
14821 if (lh
->file_names
)
14822 xfree (lh
->file_names
);
14824 /* Similarly for the include directory names. */
14825 if (lh
->include_dirs
)
14826 xfree (lh
->include_dirs
);
14831 /* Add an entry to LH's include directory table. */
14834 add_include_dir (struct line_header
*lh
, char *include_dir
)
14836 /* Grow the array if necessary. */
14837 if (lh
->include_dirs_size
== 0)
14839 lh
->include_dirs_size
= 1; /* for testing */
14840 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
14841 * sizeof (*lh
->include_dirs
));
14843 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
14845 lh
->include_dirs_size
*= 2;
14846 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
14847 (lh
->include_dirs_size
14848 * sizeof (*lh
->include_dirs
)));
14851 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
14854 /* Add an entry to LH's file name table. */
14857 add_file_name (struct line_header
*lh
,
14859 unsigned int dir_index
,
14860 unsigned int mod_time
,
14861 unsigned int length
)
14863 struct file_entry
*fe
;
14865 /* Grow the array if necessary. */
14866 if (lh
->file_names_size
== 0)
14868 lh
->file_names_size
= 1; /* for testing */
14869 lh
->file_names
= xmalloc (lh
->file_names_size
14870 * sizeof (*lh
->file_names
));
14872 else if (lh
->num_file_names
>= lh
->file_names_size
)
14874 lh
->file_names_size
*= 2;
14875 lh
->file_names
= xrealloc (lh
->file_names
,
14876 (lh
->file_names_size
14877 * sizeof (*lh
->file_names
)));
14880 fe
= &lh
->file_names
[lh
->num_file_names
++];
14882 fe
->dir_index
= dir_index
;
14883 fe
->mod_time
= mod_time
;
14884 fe
->length
= length
;
14885 fe
->included_p
= 0;
14889 /* A convenience function to find the proper .debug_line section for a
14892 static struct dwarf2_section_info
*
14893 get_debug_line_section (struct dwarf2_cu
*cu
)
14895 struct dwarf2_section_info
*section
;
14897 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
14899 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
14900 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
14901 else if (cu
->per_cu
->is_dwz
)
14903 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
14905 section
= &dwz
->line
;
14908 section
= &dwarf2_per_objfile
->line
;
14913 /* Read the statement program header starting at OFFSET in
14914 .debug_line, or .debug_line.dwo. Return a pointer
14915 to a struct line_header, allocated using xmalloc.
14917 NOTE: the strings in the include directory and file name tables of
14918 the returned object point into the dwarf line section buffer,
14919 and must not be freed. */
14921 static struct line_header
*
14922 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
14924 struct cleanup
*back_to
;
14925 struct line_header
*lh
;
14926 gdb_byte
*line_ptr
;
14927 unsigned int bytes_read
, offset_size
;
14929 char *cur_dir
, *cur_file
;
14930 struct dwarf2_section_info
*section
;
14933 section
= get_debug_line_section (cu
);
14934 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
14935 if (section
->buffer
== NULL
)
14937 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
14938 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
14940 complaint (&symfile_complaints
, _("missing .debug_line section"));
14944 /* We can't do this until we know the section is non-empty.
14945 Only then do we know we have such a section. */
14946 abfd
= section
->asection
->owner
;
14948 /* Make sure that at least there's room for the total_length field.
14949 That could be 12 bytes long, but we're just going to fudge that. */
14950 if (offset
+ 4 >= section
->size
)
14952 dwarf2_statement_list_fits_in_line_number_section_complaint ();
14956 lh
= xmalloc (sizeof (*lh
));
14957 memset (lh
, 0, sizeof (*lh
));
14958 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
14961 line_ptr
= section
->buffer
+ offset
;
14963 /* Read in the header. */
14965 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
14966 &bytes_read
, &offset_size
);
14967 line_ptr
+= bytes_read
;
14968 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
14970 dwarf2_statement_list_fits_in_line_number_section_complaint ();
14973 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
14974 lh
->version
= read_2_bytes (abfd
, line_ptr
);
14976 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
14977 line_ptr
+= offset_size
;
14978 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
14980 if (lh
->version
>= 4)
14982 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
14986 lh
->maximum_ops_per_instruction
= 1;
14988 if (lh
->maximum_ops_per_instruction
== 0)
14990 lh
->maximum_ops_per_instruction
= 1;
14991 complaint (&symfile_complaints
,
14992 _("invalid maximum_ops_per_instruction "
14993 "in `.debug_line' section"));
14996 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
14998 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
15000 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
15002 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
15004 lh
->standard_opcode_lengths
15005 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
15007 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
15008 for (i
= 1; i
< lh
->opcode_base
; ++i
)
15010 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
15014 /* Read directory table. */
15015 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
15017 line_ptr
+= bytes_read
;
15018 add_include_dir (lh
, cur_dir
);
15020 line_ptr
+= bytes_read
;
15022 /* Read file name table. */
15023 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
15025 unsigned int dir_index
, mod_time
, length
;
15027 line_ptr
+= bytes_read
;
15028 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15029 line_ptr
+= bytes_read
;
15030 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15031 line_ptr
+= bytes_read
;
15032 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15033 line_ptr
+= bytes_read
;
15035 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
15037 line_ptr
+= bytes_read
;
15038 lh
->statement_program_start
= line_ptr
;
15040 if (line_ptr
> (section
->buffer
+ section
->size
))
15041 complaint (&symfile_complaints
,
15042 _("line number info header doesn't "
15043 "fit in `.debug_line' section"));
15045 discard_cleanups (back_to
);
15049 /* Subroutine of dwarf_decode_lines to simplify it.
15050 Return the file name of the psymtab for included file FILE_INDEX
15051 in line header LH of PST.
15052 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
15053 If space for the result is malloc'd, it will be freed by a cleanup.
15054 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
15057 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
15058 const struct partial_symtab
*pst
,
15059 const char *comp_dir
)
15061 const struct file_entry fe
= lh
->file_names
[file_index
];
15062 char *include_name
= fe
.name
;
15063 char *include_name_to_compare
= include_name
;
15064 char *dir_name
= NULL
;
15065 const char *pst_filename
;
15066 char *copied_name
= NULL
;
15070 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
15072 if (!IS_ABSOLUTE_PATH (include_name
)
15073 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
15075 /* Avoid creating a duplicate psymtab for PST.
15076 We do this by comparing INCLUDE_NAME and PST_FILENAME.
15077 Before we do the comparison, however, we need to account
15078 for DIR_NAME and COMP_DIR.
15079 First prepend dir_name (if non-NULL). If we still don't
15080 have an absolute path prepend comp_dir (if non-NULL).
15081 However, the directory we record in the include-file's
15082 psymtab does not contain COMP_DIR (to match the
15083 corresponding symtab(s)).
15088 bash$ gcc -g ./hello.c
15089 include_name = "hello.c"
15091 DW_AT_comp_dir = comp_dir = "/tmp"
15092 DW_AT_name = "./hello.c" */
15094 if (dir_name
!= NULL
)
15096 include_name
= concat (dir_name
, SLASH_STRING
,
15097 include_name
, (char *)NULL
);
15098 include_name_to_compare
= include_name
;
15099 make_cleanup (xfree
, include_name
);
15101 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
15103 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
15104 include_name
, (char *)NULL
);
15108 pst_filename
= pst
->filename
;
15109 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
15111 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
15112 pst_filename
, (char *)NULL
);
15113 pst_filename
= copied_name
;
15116 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
15118 if (include_name_to_compare
!= include_name
)
15119 xfree (include_name_to_compare
);
15120 if (copied_name
!= NULL
)
15121 xfree (copied_name
);
15125 return include_name
;
15128 /* Ignore this record_line request. */
15131 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
15136 /* Subroutine of dwarf_decode_lines to simplify it.
15137 Process the line number information in LH. */
15140 dwarf_decode_lines_1 (struct line_header
*lh
, const char *comp_dir
,
15141 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
15143 gdb_byte
*line_ptr
, *extended_end
;
15144 gdb_byte
*line_end
;
15145 unsigned int bytes_read
, extended_len
;
15146 unsigned char op_code
, extended_op
, adj_opcode
;
15147 CORE_ADDR baseaddr
;
15148 struct objfile
*objfile
= cu
->objfile
;
15149 bfd
*abfd
= objfile
->obfd
;
15150 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15151 const int decode_for_pst_p
= (pst
!= NULL
);
15152 struct subfile
*last_subfile
= NULL
;
15153 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
15156 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15158 line_ptr
= lh
->statement_program_start
;
15159 line_end
= lh
->statement_program_end
;
15161 /* Read the statement sequences until there's nothing left. */
15162 while (line_ptr
< line_end
)
15164 /* state machine registers */
15165 CORE_ADDR address
= 0;
15166 unsigned int file
= 1;
15167 unsigned int line
= 1;
15168 unsigned int column
= 0;
15169 int is_stmt
= lh
->default_is_stmt
;
15170 int basic_block
= 0;
15171 int end_sequence
= 0;
15173 unsigned char op_index
= 0;
15175 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
15177 /* Start a subfile for the current file of the state machine. */
15178 /* lh->include_dirs and lh->file_names are 0-based, but the
15179 directory and file name numbers in the statement program
15181 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
15185 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15187 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15190 /* Decode the table. */
15191 while (!end_sequence
)
15193 op_code
= read_1_byte (abfd
, line_ptr
);
15195 if (line_ptr
> line_end
)
15197 dwarf2_debug_line_missing_end_sequence_complaint ();
15201 if (op_code
>= lh
->opcode_base
)
15203 /* Special operand. */
15204 adj_opcode
= op_code
- lh
->opcode_base
;
15205 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
15206 / lh
->maximum_ops_per_instruction
)
15207 * lh
->minimum_instruction_length
);
15208 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
15209 % lh
->maximum_ops_per_instruction
);
15210 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
15211 if (lh
->num_file_names
< file
|| file
== 0)
15212 dwarf2_debug_line_missing_file_complaint ();
15213 /* For now we ignore lines not starting on an
15214 instruction boundary. */
15215 else if (op_index
== 0)
15217 lh
->file_names
[file
- 1].included_p
= 1;
15218 if (!decode_for_pst_p
&& is_stmt
)
15220 if (last_subfile
!= current_subfile
)
15222 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15224 (*p_record_line
) (last_subfile
, 0, addr
);
15225 last_subfile
= current_subfile
;
15227 /* Append row to matrix using current values. */
15228 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15229 (*p_record_line
) (current_subfile
, line
, addr
);
15234 else switch (op_code
)
15236 case DW_LNS_extended_op
:
15237 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
15239 line_ptr
+= bytes_read
;
15240 extended_end
= line_ptr
+ extended_len
;
15241 extended_op
= read_1_byte (abfd
, line_ptr
);
15243 switch (extended_op
)
15245 case DW_LNE_end_sequence
:
15246 p_record_line
= record_line
;
15249 case DW_LNE_set_address
:
15250 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
15252 if (address
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15254 /* This line table is for a function which has been
15255 GCd by the linker. Ignore it. PR gdb/12528 */
15258 = line_ptr
- get_debug_line_section (cu
)->buffer
;
15260 complaint (&symfile_complaints
,
15261 _(".debug_line address at offset 0x%lx is 0 "
15263 line_offset
, objfile
->name
);
15264 p_record_line
= noop_record_line
;
15268 line_ptr
+= bytes_read
;
15269 address
+= baseaddr
;
15271 case DW_LNE_define_file
:
15274 unsigned int dir_index
, mod_time
, length
;
15276 cur_file
= read_direct_string (abfd
, line_ptr
,
15278 line_ptr
+= bytes_read
;
15280 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15281 line_ptr
+= bytes_read
;
15283 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15284 line_ptr
+= bytes_read
;
15286 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15287 line_ptr
+= bytes_read
;
15288 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
15291 case DW_LNE_set_discriminator
:
15292 /* The discriminator is not interesting to the debugger;
15294 line_ptr
= extended_end
;
15297 complaint (&symfile_complaints
,
15298 _("mangled .debug_line section"));
15301 /* Make sure that we parsed the extended op correctly. If e.g.
15302 we expected a different address size than the producer used,
15303 we may have read the wrong number of bytes. */
15304 if (line_ptr
!= extended_end
)
15306 complaint (&symfile_complaints
,
15307 _("mangled .debug_line section"));
15312 if (lh
->num_file_names
< file
|| file
== 0)
15313 dwarf2_debug_line_missing_file_complaint ();
15316 lh
->file_names
[file
- 1].included_p
= 1;
15317 if (!decode_for_pst_p
&& is_stmt
)
15319 if (last_subfile
!= current_subfile
)
15321 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15323 (*p_record_line
) (last_subfile
, 0, addr
);
15324 last_subfile
= current_subfile
;
15326 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15327 (*p_record_line
) (current_subfile
, line
, addr
);
15332 case DW_LNS_advance_pc
:
15335 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15337 address
+= (((op_index
+ adjust
)
15338 / lh
->maximum_ops_per_instruction
)
15339 * lh
->minimum_instruction_length
);
15340 op_index
= ((op_index
+ adjust
)
15341 % lh
->maximum_ops_per_instruction
);
15342 line_ptr
+= bytes_read
;
15345 case DW_LNS_advance_line
:
15346 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
15347 line_ptr
+= bytes_read
;
15349 case DW_LNS_set_file
:
15351 /* The arrays lh->include_dirs and lh->file_names are
15352 0-based, but the directory and file name numbers in
15353 the statement program are 1-based. */
15354 struct file_entry
*fe
;
15357 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15358 line_ptr
+= bytes_read
;
15359 if (lh
->num_file_names
< file
|| file
== 0)
15360 dwarf2_debug_line_missing_file_complaint ();
15363 fe
= &lh
->file_names
[file
- 1];
15365 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15366 if (!decode_for_pst_p
)
15368 last_subfile
= current_subfile
;
15369 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15374 case DW_LNS_set_column
:
15375 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15376 line_ptr
+= bytes_read
;
15378 case DW_LNS_negate_stmt
:
15379 is_stmt
= (!is_stmt
);
15381 case DW_LNS_set_basic_block
:
15384 /* Add to the address register of the state machine the
15385 address increment value corresponding to special opcode
15386 255. I.e., this value is scaled by the minimum
15387 instruction length since special opcode 255 would have
15388 scaled the increment. */
15389 case DW_LNS_const_add_pc
:
15391 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
15393 address
+= (((op_index
+ adjust
)
15394 / lh
->maximum_ops_per_instruction
)
15395 * lh
->minimum_instruction_length
);
15396 op_index
= ((op_index
+ adjust
)
15397 % lh
->maximum_ops_per_instruction
);
15400 case DW_LNS_fixed_advance_pc
:
15401 address
+= read_2_bytes (abfd
, line_ptr
);
15407 /* Unknown standard opcode, ignore it. */
15410 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
15412 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15413 line_ptr
+= bytes_read
;
15418 if (lh
->num_file_names
< file
|| file
== 0)
15419 dwarf2_debug_line_missing_file_complaint ();
15422 lh
->file_names
[file
- 1].included_p
= 1;
15423 if (!decode_for_pst_p
)
15425 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15426 (*p_record_line
) (current_subfile
, 0, addr
);
15432 /* Decode the Line Number Program (LNP) for the given line_header
15433 structure and CU. The actual information extracted and the type
15434 of structures created from the LNP depends on the value of PST.
15436 1. If PST is NULL, then this procedure uses the data from the program
15437 to create all necessary symbol tables, and their linetables.
15439 2. If PST is not NULL, this procedure reads the program to determine
15440 the list of files included by the unit represented by PST, and
15441 builds all the associated partial symbol tables.
15443 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
15444 It is used for relative paths in the line table.
15445 NOTE: When processing partial symtabs (pst != NULL),
15446 comp_dir == pst->dirname.
15448 NOTE: It is important that psymtabs have the same file name (via strcmp)
15449 as the corresponding symtab. Since COMP_DIR is not used in the name of the
15450 symtab we don't use it in the name of the psymtabs we create.
15451 E.g. expand_line_sal requires this when finding psymtabs to expand.
15452 A good testcase for this is mb-inline.exp. */
15455 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
15456 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
15457 int want_line_info
)
15459 struct objfile
*objfile
= cu
->objfile
;
15460 const int decode_for_pst_p
= (pst
!= NULL
);
15461 struct subfile
*first_subfile
= current_subfile
;
15463 if (want_line_info
)
15464 dwarf_decode_lines_1 (lh
, comp_dir
, cu
, pst
);
15466 if (decode_for_pst_p
)
15470 /* Now that we're done scanning the Line Header Program, we can
15471 create the psymtab of each included file. */
15472 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
15473 if (lh
->file_names
[file_index
].included_p
== 1)
15475 char *include_name
=
15476 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
15477 if (include_name
!= NULL
)
15478 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
15483 /* Make sure a symtab is created for every file, even files
15484 which contain only variables (i.e. no code with associated
15488 for (i
= 0; i
< lh
->num_file_names
; i
++)
15491 struct file_entry
*fe
;
15493 fe
= &lh
->file_names
[i
];
15495 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15496 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15498 /* Skip the main file; we don't need it, and it must be
15499 allocated last, so that it will show up before the
15500 non-primary symtabs in the objfile's symtab list. */
15501 if (current_subfile
== first_subfile
)
15504 if (current_subfile
->symtab
== NULL
)
15505 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
15507 fe
->symtab
= current_subfile
->symtab
;
15512 /* Start a subfile for DWARF. FILENAME is the name of the file and
15513 DIRNAME the name of the source directory which contains FILENAME
15514 or NULL if not known. COMP_DIR is the compilation directory for the
15515 linetable's compilation unit or NULL if not known.
15516 This routine tries to keep line numbers from identical absolute and
15517 relative file names in a common subfile.
15519 Using the `list' example from the GDB testsuite, which resides in
15520 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
15521 of /srcdir/list0.c yields the following debugging information for list0.c:
15523 DW_AT_name: /srcdir/list0.c
15524 DW_AT_comp_dir: /compdir
15525 files.files[0].name: list0.h
15526 files.files[0].dir: /srcdir
15527 files.files[1].name: list0.c
15528 files.files[1].dir: /srcdir
15530 The line number information for list0.c has to end up in a single
15531 subfile, so that `break /srcdir/list0.c:1' works as expected.
15532 start_subfile will ensure that this happens provided that we pass the
15533 concatenation of files.files[1].dir and files.files[1].name as the
15537 dwarf2_start_subfile (char *filename
, const char *dirname
,
15538 const char *comp_dir
)
15542 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
15543 `start_symtab' will always pass the contents of DW_AT_comp_dir as
15544 second argument to start_subfile. To be consistent, we do the
15545 same here. In order not to lose the line information directory,
15546 we concatenate it to the filename when it makes sense.
15547 Note that the Dwarf3 standard says (speaking of filenames in line
15548 information): ``The directory index is ignored for file names
15549 that represent full path names''. Thus ignoring dirname in the
15550 `else' branch below isn't an issue. */
15552 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
15553 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
15555 fullname
= filename
;
15557 start_subfile (fullname
, comp_dir
);
15559 if (fullname
!= filename
)
15563 /* Start a symtab for DWARF.
15564 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
15567 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
15568 char *name
, char *comp_dir
, CORE_ADDR low_pc
)
15570 start_symtab (name
, comp_dir
, low_pc
);
15571 record_debugformat ("DWARF 2");
15572 record_producer (cu
->producer
);
15574 /* We assume that we're processing GCC output. */
15575 processing_gcc_compilation
= 2;
15577 processing_has_namespace_info
= 0;
15581 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
15582 struct dwarf2_cu
*cu
)
15584 struct objfile
*objfile
= cu
->objfile
;
15585 struct comp_unit_head
*cu_header
= &cu
->header
;
15587 /* NOTE drow/2003-01-30: There used to be a comment and some special
15588 code here to turn a symbol with DW_AT_external and a
15589 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
15590 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
15591 with some versions of binutils) where shared libraries could have
15592 relocations against symbols in their debug information - the
15593 minimal symbol would have the right address, but the debug info
15594 would not. It's no longer necessary, because we will explicitly
15595 apply relocations when we read in the debug information now. */
15597 /* A DW_AT_location attribute with no contents indicates that a
15598 variable has been optimized away. */
15599 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
15601 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
15605 /* Handle one degenerate form of location expression specially, to
15606 preserve GDB's previous behavior when section offsets are
15607 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
15608 then mark this symbol as LOC_STATIC. */
15610 if (attr_form_is_block (attr
)
15611 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
15612 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
15613 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
15614 && (DW_BLOCK (attr
)->size
15615 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
15617 unsigned int dummy
;
15619 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
15620 SYMBOL_VALUE_ADDRESS (sym
) =
15621 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
15623 SYMBOL_VALUE_ADDRESS (sym
) =
15624 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
15625 SYMBOL_CLASS (sym
) = LOC_STATIC
;
15626 fixup_symbol_section (sym
, objfile
);
15627 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
15628 SYMBOL_SECTION (sym
));
15632 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
15633 expression evaluator, and use LOC_COMPUTED only when necessary
15634 (i.e. when the value of a register or memory location is
15635 referenced, or a thread-local block, etc.). Then again, it might
15636 not be worthwhile. I'm assuming that it isn't unless performance
15637 or memory numbers show me otherwise. */
15639 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
15640 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
15642 if (SYMBOL_COMPUTED_OPS (sym
) == &dwarf2_loclist_funcs
)
15643 cu
->has_loclist
= 1;
15646 /* Given a pointer to a DWARF information entry, figure out if we need
15647 to make a symbol table entry for it, and if so, create a new entry
15648 and return a pointer to it.
15649 If TYPE is NULL, determine symbol type from the die, otherwise
15650 used the passed type.
15651 If SPACE is not NULL, use it to hold the new symbol. If it is
15652 NULL, allocate a new symbol on the objfile's obstack. */
15654 static struct symbol
*
15655 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
15656 struct symbol
*space
)
15658 struct objfile
*objfile
= cu
->objfile
;
15659 struct symbol
*sym
= NULL
;
15661 struct attribute
*attr
= NULL
;
15662 struct attribute
*attr2
= NULL
;
15663 CORE_ADDR baseaddr
;
15664 struct pending
**list_to_add
= NULL
;
15666 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
15668 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15670 name
= dwarf2_name (die
, cu
);
15673 const char *linkagename
;
15674 int suppress_add
= 0;
15679 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
15680 OBJSTAT (objfile
, n_syms
++);
15682 /* Cache this symbol's name and the name's demangled form (if any). */
15683 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
15684 linkagename
= dwarf2_physname (name
, die
, cu
);
15685 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
15687 /* Fortran does not have mangling standard and the mangling does differ
15688 between gfortran, iFort etc. */
15689 if (cu
->language
== language_fortran
15690 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
15691 symbol_set_demangled_name (&(sym
->ginfo
),
15692 (char *) dwarf2_full_name (name
, die
, cu
),
15695 /* Default assumptions.
15696 Use the passed type or decode it from the die. */
15697 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
15698 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
15700 SYMBOL_TYPE (sym
) = type
;
15702 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
15703 attr
= dwarf2_attr (die
,
15704 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
15708 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
15711 attr
= dwarf2_attr (die
,
15712 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
15716 int file_index
= DW_UNSND (attr
);
15718 if (cu
->line_header
== NULL
15719 || file_index
> cu
->line_header
->num_file_names
)
15720 complaint (&symfile_complaints
,
15721 _("file index out of range"));
15722 else if (file_index
> 0)
15724 struct file_entry
*fe
;
15726 fe
= &cu
->line_header
->file_names
[file_index
- 1];
15727 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
15734 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
15737 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
15739 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
15740 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
15741 SYMBOL_CLASS (sym
) = LOC_LABEL
;
15742 add_symbol_to_list (sym
, cu
->list_in_scope
);
15744 case DW_TAG_subprogram
:
15745 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
15747 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
15748 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15749 if ((attr2
&& (DW_UNSND (attr2
) != 0))
15750 || cu
->language
== language_ada
)
15752 /* Subprograms marked external are stored as a global symbol.
15753 Ada subprograms, whether marked external or not, are always
15754 stored as a global symbol, because we want to be able to
15755 access them globally. For instance, we want to be able
15756 to break on a nested subprogram without having to
15757 specify the context. */
15758 list_to_add
= &global_symbols
;
15762 list_to_add
= cu
->list_in_scope
;
15765 case DW_TAG_inlined_subroutine
:
15766 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
15768 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
15769 SYMBOL_INLINED (sym
) = 1;
15770 list_to_add
= cu
->list_in_scope
;
15772 case DW_TAG_template_value_param
:
15774 /* Fall through. */
15775 case DW_TAG_constant
:
15776 case DW_TAG_variable
:
15777 case DW_TAG_member
:
15778 /* Compilation with minimal debug info may result in
15779 variables with missing type entries. Change the
15780 misleading `void' type to something sensible. */
15781 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
15783 = objfile_type (objfile
)->nodebug_data_symbol
;
15785 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15786 /* In the case of DW_TAG_member, we should only be called for
15787 static const members. */
15788 if (die
->tag
== DW_TAG_member
)
15790 /* dwarf2_add_field uses die_is_declaration,
15791 so we do the same. */
15792 gdb_assert (die_is_declaration (die
, cu
));
15797 dwarf2_const_value (attr
, sym
, cu
);
15798 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15801 if (attr2
&& (DW_UNSND (attr2
) != 0))
15802 list_to_add
= &global_symbols
;
15804 list_to_add
= cu
->list_in_scope
;
15808 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15811 var_decode_location (attr
, sym
, cu
);
15812 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15814 /* Fortran explicitly imports any global symbols to the local
15815 scope by DW_TAG_common_block. */
15816 if (cu
->language
== language_fortran
&& die
->parent
15817 && die
->parent
->tag
== DW_TAG_common_block
)
15820 if (SYMBOL_CLASS (sym
) == LOC_STATIC
15821 && SYMBOL_VALUE_ADDRESS (sym
) == 0
15822 && !dwarf2_per_objfile
->has_section_at_zero
)
15824 /* When a static variable is eliminated by the linker,
15825 the corresponding debug information is not stripped
15826 out, but the variable address is set to null;
15827 do not add such variables into symbol table. */
15829 else if (attr2
&& (DW_UNSND (attr2
) != 0))
15831 /* Workaround gfortran PR debug/40040 - it uses
15832 DW_AT_location for variables in -fPIC libraries which may
15833 get overriden by other libraries/executable and get
15834 a different address. Resolve it by the minimal symbol
15835 which may come from inferior's executable using copy
15836 relocation. Make this workaround only for gfortran as for
15837 other compilers GDB cannot guess the minimal symbol
15838 Fortran mangling kind. */
15839 if (cu
->language
== language_fortran
&& die
->parent
15840 && die
->parent
->tag
== DW_TAG_module
15842 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
15843 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
15845 /* A variable with DW_AT_external is never static,
15846 but it may be block-scoped. */
15847 list_to_add
= (cu
->list_in_scope
== &file_symbols
15848 ? &global_symbols
: cu
->list_in_scope
);
15851 list_to_add
= cu
->list_in_scope
;
15855 /* We do not know the address of this symbol.
15856 If it is an external symbol and we have type information
15857 for it, enter the symbol as a LOC_UNRESOLVED symbol.
15858 The address of the variable will then be determined from
15859 the minimal symbol table whenever the variable is
15861 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15863 /* Fortran explicitly imports any global symbols to the local
15864 scope by DW_TAG_common_block. */
15865 if (cu
->language
== language_fortran
&& die
->parent
15866 && die
->parent
->tag
== DW_TAG_common_block
)
15868 /* SYMBOL_CLASS doesn't matter here because
15869 read_common_block is going to reset it. */
15871 list_to_add
= cu
->list_in_scope
;
15873 else if (attr2
&& (DW_UNSND (attr2
) != 0)
15874 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
15876 /* A variable with DW_AT_external is never static, but it
15877 may be block-scoped. */
15878 list_to_add
= (cu
->list_in_scope
== &file_symbols
15879 ? &global_symbols
: cu
->list_in_scope
);
15881 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
15883 else if (!die_is_declaration (die
, cu
))
15885 /* Use the default LOC_OPTIMIZED_OUT class. */
15886 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
15888 list_to_add
= cu
->list_in_scope
;
15892 case DW_TAG_formal_parameter
:
15893 /* If we are inside a function, mark this as an argument. If
15894 not, we might be looking at an argument to an inlined function
15895 when we do not have enough information to show inlined frames;
15896 pretend it's a local variable in that case so that the user can
15898 if (context_stack_depth
> 0
15899 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
15900 SYMBOL_IS_ARGUMENT (sym
) = 1;
15901 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15904 var_decode_location (attr
, sym
, cu
);
15906 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15909 dwarf2_const_value (attr
, sym
, cu
);
15912 list_to_add
= cu
->list_in_scope
;
15914 case DW_TAG_unspecified_parameters
:
15915 /* From varargs functions; gdb doesn't seem to have any
15916 interest in this information, so just ignore it for now.
15919 case DW_TAG_template_type_param
:
15921 /* Fall through. */
15922 case DW_TAG_class_type
:
15923 case DW_TAG_interface_type
:
15924 case DW_TAG_structure_type
:
15925 case DW_TAG_union_type
:
15926 case DW_TAG_set_type
:
15927 case DW_TAG_enumeration_type
:
15928 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
15929 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
15932 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
15933 really ever be static objects: otherwise, if you try
15934 to, say, break of a class's method and you're in a file
15935 which doesn't mention that class, it won't work unless
15936 the check for all static symbols in lookup_symbol_aux
15937 saves you. See the OtherFileClass tests in
15938 gdb.c++/namespace.exp. */
15942 list_to_add
= (cu
->list_in_scope
== &file_symbols
15943 && (cu
->language
== language_cplus
15944 || cu
->language
== language_java
)
15945 ? &global_symbols
: cu
->list_in_scope
);
15947 /* The semantics of C++ state that "struct foo {
15948 ... }" also defines a typedef for "foo". A Java
15949 class declaration also defines a typedef for the
15951 if (cu
->language
== language_cplus
15952 || cu
->language
== language_java
15953 || cu
->language
== language_ada
)
15955 /* The symbol's name is already allocated along
15956 with this objfile, so we don't need to
15957 duplicate it for the type. */
15958 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
15959 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
15964 case DW_TAG_typedef
:
15965 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
15966 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
15967 list_to_add
= cu
->list_in_scope
;
15969 case DW_TAG_base_type
:
15970 case DW_TAG_subrange_type
:
15971 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
15972 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
15973 list_to_add
= cu
->list_in_scope
;
15975 case DW_TAG_enumerator
:
15976 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15979 dwarf2_const_value (attr
, sym
, cu
);
15982 /* NOTE: carlton/2003-11-10: See comment above in the
15983 DW_TAG_class_type, etc. block. */
15985 list_to_add
= (cu
->list_in_scope
== &file_symbols
15986 && (cu
->language
== language_cplus
15987 || cu
->language
== language_java
)
15988 ? &global_symbols
: cu
->list_in_scope
);
15991 case DW_TAG_namespace
:
15992 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
15993 list_to_add
= &global_symbols
;
15995 case DW_TAG_common_block
:
15996 SYMBOL_CLASS (sym
) = LOC_STATIC
;
15997 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
15998 add_symbol_to_list (sym
, cu
->list_in_scope
);
16001 /* Not a tag we recognize. Hopefully we aren't processing
16002 trash data, but since we must specifically ignore things
16003 we don't recognize, there is nothing else we should do at
16005 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
16006 dwarf_tag_name (die
->tag
));
16012 sym
->hash_next
= objfile
->template_symbols
;
16013 objfile
->template_symbols
= sym
;
16014 list_to_add
= NULL
;
16017 if (list_to_add
!= NULL
)
16018 add_symbol_to_list (sym
, list_to_add
);
16020 /* For the benefit of old versions of GCC, check for anonymous
16021 namespaces based on the demangled name. */
16022 if (!processing_has_namespace_info
16023 && cu
->language
== language_cplus
)
16024 cp_scan_for_anonymous_namespaces (sym
, objfile
);
16029 /* A wrapper for new_symbol_full that always allocates a new symbol. */
16031 static struct symbol
*
16032 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
16034 return new_symbol_full (die
, type
, cu
, NULL
);
16037 /* Given an attr with a DW_FORM_dataN value in host byte order,
16038 zero-extend it as appropriate for the symbol's type. The DWARF
16039 standard (v4) is not entirely clear about the meaning of using
16040 DW_FORM_dataN for a constant with a signed type, where the type is
16041 wider than the data. The conclusion of a discussion on the DWARF
16042 list was that this is unspecified. We choose to always zero-extend
16043 because that is the interpretation long in use by GCC. */
16046 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
16047 const char *name
, struct obstack
*obstack
,
16048 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
16050 struct objfile
*objfile
= cu
->objfile
;
16051 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
16052 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
16053 LONGEST l
= DW_UNSND (attr
);
16055 if (bits
< sizeof (*value
) * 8)
16057 l
&= ((LONGEST
) 1 << bits
) - 1;
16060 else if (bits
== sizeof (*value
) * 8)
16064 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
16065 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
16072 /* Read a constant value from an attribute. Either set *VALUE, or if
16073 the value does not fit in *VALUE, set *BYTES - either already
16074 allocated on the objfile obstack, or newly allocated on OBSTACK,
16075 or, set *BATON, if we translated the constant to a location
16079 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
16080 const char *name
, struct obstack
*obstack
,
16081 struct dwarf2_cu
*cu
,
16082 LONGEST
*value
, gdb_byte
**bytes
,
16083 struct dwarf2_locexpr_baton
**baton
)
16085 struct objfile
*objfile
= cu
->objfile
;
16086 struct comp_unit_head
*cu_header
= &cu
->header
;
16087 struct dwarf_block
*blk
;
16088 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
16089 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
16095 switch (attr
->form
)
16098 case DW_FORM_GNU_addr_index
:
16102 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
16103 dwarf2_const_value_length_mismatch_complaint (name
,
16104 cu_header
->addr_size
,
16105 TYPE_LENGTH (type
));
16106 /* Symbols of this form are reasonably rare, so we just
16107 piggyback on the existing location code rather than writing
16108 a new implementation of symbol_computed_ops. */
16109 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
16110 sizeof (struct dwarf2_locexpr_baton
));
16111 (*baton
)->per_cu
= cu
->per_cu
;
16112 gdb_assert ((*baton
)->per_cu
);
16114 (*baton
)->size
= 2 + cu_header
->addr_size
;
16115 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
16116 (*baton
)->data
= data
;
16118 data
[0] = DW_OP_addr
;
16119 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
16120 byte_order
, DW_ADDR (attr
));
16121 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
16124 case DW_FORM_string
:
16126 case DW_FORM_GNU_str_index
:
16127 case DW_FORM_GNU_strp_alt
:
16128 /* DW_STRING is already allocated on the objfile obstack, point
16130 *bytes
= (gdb_byte
*) DW_STRING (attr
);
16132 case DW_FORM_block1
:
16133 case DW_FORM_block2
:
16134 case DW_FORM_block4
:
16135 case DW_FORM_block
:
16136 case DW_FORM_exprloc
:
16137 blk
= DW_BLOCK (attr
);
16138 if (TYPE_LENGTH (type
) != blk
->size
)
16139 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
16140 TYPE_LENGTH (type
));
16141 *bytes
= blk
->data
;
16144 /* The DW_AT_const_value attributes are supposed to carry the
16145 symbol's value "represented as it would be on the target
16146 architecture." By the time we get here, it's already been
16147 converted to host endianness, so we just need to sign- or
16148 zero-extend it as appropriate. */
16149 case DW_FORM_data1
:
16150 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16151 obstack
, cu
, value
, 8);
16153 case DW_FORM_data2
:
16154 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16155 obstack
, cu
, value
, 16);
16157 case DW_FORM_data4
:
16158 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16159 obstack
, cu
, value
, 32);
16161 case DW_FORM_data8
:
16162 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16163 obstack
, cu
, value
, 64);
16166 case DW_FORM_sdata
:
16167 *value
= DW_SND (attr
);
16170 case DW_FORM_udata
:
16171 *value
= DW_UNSND (attr
);
16175 complaint (&symfile_complaints
,
16176 _("unsupported const value attribute form: '%s'"),
16177 dwarf_form_name (attr
->form
));
16184 /* Copy constant value from an attribute to a symbol. */
16187 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
16188 struct dwarf2_cu
*cu
)
16190 struct objfile
*objfile
= cu
->objfile
;
16191 struct comp_unit_head
*cu_header
= &cu
->header
;
16194 struct dwarf2_locexpr_baton
*baton
;
16196 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
16197 SYMBOL_PRINT_NAME (sym
),
16198 &objfile
->objfile_obstack
, cu
,
16199 &value
, &bytes
, &baton
);
16203 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
16204 SYMBOL_LOCATION_BATON (sym
) = baton
;
16205 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
16207 else if (bytes
!= NULL
)
16209 SYMBOL_VALUE_BYTES (sym
) = bytes
;
16210 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
16214 SYMBOL_VALUE (sym
) = value
;
16215 SYMBOL_CLASS (sym
) = LOC_CONST
;
16219 /* Return the type of the die in question using its DW_AT_type attribute. */
16221 static struct type
*
16222 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16224 struct attribute
*type_attr
;
16226 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16229 /* A missing DW_AT_type represents a void type. */
16230 return objfile_type (cu
->objfile
)->builtin_void
;
16233 return lookup_die_type (die
, type_attr
, cu
);
16236 /* True iff CU's producer generates GNAT Ada auxiliary information
16237 that allows to find parallel types through that information instead
16238 of having to do expensive parallel lookups by type name. */
16241 need_gnat_info (struct dwarf2_cu
*cu
)
16243 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
16244 of GNAT produces this auxiliary information, without any indication
16245 that it is produced. Part of enhancing the FSF version of GNAT
16246 to produce that information will be to put in place an indicator
16247 that we can use in order to determine whether the descriptive type
16248 info is available or not. One suggestion that has been made is
16249 to use a new attribute, attached to the CU die. For now, assume
16250 that the descriptive type info is not available. */
16254 /* Return the auxiliary type of the die in question using its
16255 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
16256 attribute is not present. */
16258 static struct type
*
16259 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16261 struct attribute
*type_attr
;
16263 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
16267 return lookup_die_type (die
, type_attr
, cu
);
16270 /* If DIE has a descriptive_type attribute, then set the TYPE's
16271 descriptive type accordingly. */
16274 set_descriptive_type (struct type
*type
, struct die_info
*die
,
16275 struct dwarf2_cu
*cu
)
16277 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
16279 if (descriptive_type
)
16281 ALLOCATE_GNAT_AUX_TYPE (type
);
16282 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
16286 /* Return the containing type of the die in question using its
16287 DW_AT_containing_type attribute. */
16289 static struct type
*
16290 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16292 struct attribute
*type_attr
;
16294 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
16296 error (_("Dwarf Error: Problem turning containing type into gdb type "
16297 "[in module %s]"), cu
->objfile
->name
);
16299 return lookup_die_type (die
, type_attr
, cu
);
16302 /* Look up the type of DIE in CU using its type attribute ATTR.
16303 If there is no type substitute an error marker. */
16305 static struct type
*
16306 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
16307 struct dwarf2_cu
*cu
)
16309 struct objfile
*objfile
= cu
->objfile
;
16310 struct type
*this_type
;
16312 /* First see if we have it cached. */
16314 if (attr
->form
== DW_FORM_GNU_ref_alt
)
16316 struct dwarf2_per_cu_data
*per_cu
;
16317 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
16319 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
16320 this_type
= get_die_type_at_offset (offset
, per_cu
);
16322 else if (is_ref_attr (attr
))
16324 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
16326 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
16328 else if (attr
->form
== DW_FORM_ref_sig8
)
16330 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
16332 /* sig_type will be NULL if the signatured type is missing from
16334 if (sig_type
== NULL
)
16335 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
16336 "at 0x%x [in module %s]"),
16337 die
->offset
.sect_off
, objfile
->name
);
16339 gdb_assert (sig_type
->per_cu
.is_debug_types
);
16340 /* If we haven't filled in type_offset_in_section yet, then we
16341 haven't read the type in yet. */
16343 if (sig_type
->type_offset_in_section
.sect_off
!= 0)
16346 get_die_type_at_offset (sig_type
->type_offset_in_section
,
16347 &sig_type
->per_cu
);
16352 dump_die_for_error (die
);
16353 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
16354 dwarf_attr_name (attr
->name
), objfile
->name
);
16357 /* If not cached we need to read it in. */
16359 if (this_type
== NULL
)
16361 struct die_info
*type_die
;
16362 struct dwarf2_cu
*type_cu
= cu
;
16364 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
16365 /* If we found the type now, it's probably because the type came
16366 from an inter-CU reference and the type's CU got expanded before
16368 this_type
= get_die_type (type_die
, type_cu
);
16369 if (this_type
== NULL
)
16370 this_type
= read_type_die_1 (type_die
, type_cu
);
16373 /* If we still don't have a type use an error marker. */
16375 if (this_type
== NULL
)
16377 char *message
, *saved
;
16379 /* read_type_die already issued a complaint. */
16380 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
16382 cu
->header
.offset
.sect_off
,
16383 die
->offset
.sect_off
);
16384 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
16385 message
, strlen (message
));
16388 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
16394 /* Return the type in DIE, CU.
16395 Returns NULL for invalid types.
16397 This first does a lookup in the appropriate type_hash table,
16398 and only reads the die in if necessary.
16400 NOTE: This can be called when reading in partial or full symbols. */
16402 static struct type
*
16403 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
16405 struct type
*this_type
;
16407 this_type
= get_die_type (die
, cu
);
16411 return read_type_die_1 (die
, cu
);
16414 /* Read the type in DIE, CU.
16415 Returns NULL for invalid types. */
16417 static struct type
*
16418 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
16420 struct type
*this_type
= NULL
;
16424 case DW_TAG_class_type
:
16425 case DW_TAG_interface_type
:
16426 case DW_TAG_structure_type
:
16427 case DW_TAG_union_type
:
16428 this_type
= read_structure_type (die
, cu
);
16430 case DW_TAG_enumeration_type
:
16431 this_type
= read_enumeration_type (die
, cu
);
16433 case DW_TAG_subprogram
:
16434 case DW_TAG_subroutine_type
:
16435 case DW_TAG_inlined_subroutine
:
16436 this_type
= read_subroutine_type (die
, cu
);
16438 case DW_TAG_array_type
:
16439 this_type
= read_array_type (die
, cu
);
16441 case DW_TAG_set_type
:
16442 this_type
= read_set_type (die
, cu
);
16444 case DW_TAG_pointer_type
:
16445 this_type
= read_tag_pointer_type (die
, cu
);
16447 case DW_TAG_ptr_to_member_type
:
16448 this_type
= read_tag_ptr_to_member_type (die
, cu
);
16450 case DW_TAG_reference_type
:
16451 this_type
= read_tag_reference_type (die
, cu
);
16453 case DW_TAG_const_type
:
16454 this_type
= read_tag_const_type (die
, cu
);
16456 case DW_TAG_volatile_type
:
16457 this_type
= read_tag_volatile_type (die
, cu
);
16459 case DW_TAG_string_type
:
16460 this_type
= read_tag_string_type (die
, cu
);
16462 case DW_TAG_typedef
:
16463 this_type
= read_typedef (die
, cu
);
16465 case DW_TAG_subrange_type
:
16466 this_type
= read_subrange_type (die
, cu
);
16468 case DW_TAG_base_type
:
16469 this_type
= read_base_type (die
, cu
);
16471 case DW_TAG_unspecified_type
:
16472 this_type
= read_unspecified_type (die
, cu
);
16474 case DW_TAG_namespace
:
16475 this_type
= read_namespace_type (die
, cu
);
16477 case DW_TAG_module
:
16478 this_type
= read_module_type (die
, cu
);
16481 complaint (&symfile_complaints
,
16482 _("unexpected tag in read_type_die: '%s'"),
16483 dwarf_tag_name (die
->tag
));
16490 /* See if we can figure out if the class lives in a namespace. We do
16491 this by looking for a member function; its demangled name will
16492 contain namespace info, if there is any.
16493 Return the computed name or NULL.
16494 Space for the result is allocated on the objfile's obstack.
16495 This is the full-die version of guess_partial_die_structure_name.
16496 In this case we know DIE has no useful parent. */
16499 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
16501 struct die_info
*spec_die
;
16502 struct dwarf2_cu
*spec_cu
;
16503 struct die_info
*child
;
16506 spec_die
= die_specification (die
, &spec_cu
);
16507 if (spec_die
!= NULL
)
16513 for (child
= die
->child
;
16515 child
= child
->sibling
)
16517 if (child
->tag
== DW_TAG_subprogram
)
16519 struct attribute
*attr
;
16521 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
16523 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
16527 = language_class_name_from_physname (cu
->language_defn
,
16531 if (actual_name
!= NULL
)
16533 char *die_name
= dwarf2_name (die
, cu
);
16535 if (die_name
!= NULL
16536 && strcmp (die_name
, actual_name
) != 0)
16538 /* Strip off the class name from the full name.
16539 We want the prefix. */
16540 int die_name_len
= strlen (die_name
);
16541 int actual_name_len
= strlen (actual_name
);
16543 /* Test for '::' as a sanity check. */
16544 if (actual_name_len
> die_name_len
+ 2
16545 && actual_name
[actual_name_len
16546 - die_name_len
- 1] == ':')
16548 obsavestring (actual_name
,
16549 actual_name_len
- die_name_len
- 2,
16550 &cu
->objfile
->objfile_obstack
);
16553 xfree (actual_name
);
16562 /* GCC might emit a nameless typedef that has a linkage name. Determine the
16563 prefix part in such case. See
16564 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16567 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
16569 struct attribute
*attr
;
16572 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
16573 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
16576 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
16577 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
16580 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
16582 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
16583 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
16586 /* dwarf2_name had to be already called. */
16587 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
16589 /* Strip the base name, keep any leading namespaces/classes. */
16590 base
= strrchr (DW_STRING (attr
), ':');
16591 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
16594 return obsavestring (DW_STRING (attr
), &base
[-1] - DW_STRING (attr
),
16595 &cu
->objfile
->objfile_obstack
);
16598 /* Return the name of the namespace/class that DIE is defined within,
16599 or "" if we can't tell. The caller should not xfree the result.
16601 For example, if we're within the method foo() in the following
16611 then determine_prefix on foo's die will return "N::C". */
16613 static const char *
16614 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
16616 struct die_info
*parent
, *spec_die
;
16617 struct dwarf2_cu
*spec_cu
;
16618 struct type
*parent_type
;
16621 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
16622 && cu
->language
!= language_fortran
)
16625 retval
= anonymous_struct_prefix (die
, cu
);
16629 /* We have to be careful in the presence of DW_AT_specification.
16630 For example, with GCC 3.4, given the code
16634 // Definition of N::foo.
16638 then we'll have a tree of DIEs like this:
16640 1: DW_TAG_compile_unit
16641 2: DW_TAG_namespace // N
16642 3: DW_TAG_subprogram // declaration of N::foo
16643 4: DW_TAG_subprogram // definition of N::foo
16644 DW_AT_specification // refers to die #3
16646 Thus, when processing die #4, we have to pretend that we're in
16647 the context of its DW_AT_specification, namely the contex of die
16650 spec_die
= die_specification (die
, &spec_cu
);
16651 if (spec_die
== NULL
)
16652 parent
= die
->parent
;
16655 parent
= spec_die
->parent
;
16659 if (parent
== NULL
)
16661 else if (parent
->building_fullname
)
16664 const char *parent_name
;
16666 /* It has been seen on RealView 2.2 built binaries,
16667 DW_TAG_template_type_param types actually _defined_ as
16668 children of the parent class:
16671 template class <class Enum> Class{};
16672 Class<enum E> class_e;
16674 1: DW_TAG_class_type (Class)
16675 2: DW_TAG_enumeration_type (E)
16676 3: DW_TAG_enumerator (enum1:0)
16677 3: DW_TAG_enumerator (enum2:1)
16679 2: DW_TAG_template_type_param
16680 DW_AT_type DW_FORM_ref_udata (E)
16682 Besides being broken debug info, it can put GDB into an
16683 infinite loop. Consider:
16685 When we're building the full name for Class<E>, we'll start
16686 at Class, and go look over its template type parameters,
16687 finding E. We'll then try to build the full name of E, and
16688 reach here. We're now trying to build the full name of E,
16689 and look over the parent DIE for containing scope. In the
16690 broken case, if we followed the parent DIE of E, we'd again
16691 find Class, and once again go look at its template type
16692 arguments, etc., etc. Simply don't consider such parent die
16693 as source-level parent of this die (it can't be, the language
16694 doesn't allow it), and break the loop here. */
16695 name
= dwarf2_name (die
, cu
);
16696 parent_name
= dwarf2_name (parent
, cu
);
16697 complaint (&symfile_complaints
,
16698 _("template param type '%s' defined within parent '%s'"),
16699 name
? name
: "<unknown>",
16700 parent_name
? parent_name
: "<unknown>");
16704 switch (parent
->tag
)
16706 case DW_TAG_namespace
:
16707 parent_type
= read_type_die (parent
, cu
);
16708 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
16709 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
16710 Work around this problem here. */
16711 if (cu
->language
== language_cplus
16712 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
16714 /* We give a name to even anonymous namespaces. */
16715 return TYPE_TAG_NAME (parent_type
);
16716 case DW_TAG_class_type
:
16717 case DW_TAG_interface_type
:
16718 case DW_TAG_structure_type
:
16719 case DW_TAG_union_type
:
16720 case DW_TAG_module
:
16721 parent_type
= read_type_die (parent
, cu
);
16722 if (TYPE_TAG_NAME (parent_type
) != NULL
)
16723 return TYPE_TAG_NAME (parent_type
);
16725 /* An anonymous structure is only allowed non-static data
16726 members; no typedefs, no member functions, et cetera.
16727 So it does not need a prefix. */
16729 case DW_TAG_compile_unit
:
16730 case DW_TAG_partial_unit
:
16731 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
16732 if (cu
->language
== language_cplus
16733 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16734 && die
->child
!= NULL
16735 && (die
->tag
== DW_TAG_class_type
16736 || die
->tag
== DW_TAG_structure_type
16737 || die
->tag
== DW_TAG_union_type
))
16739 char *name
= guess_full_die_structure_name (die
, cu
);
16745 return determine_prefix (parent
, cu
);
16749 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
16750 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
16751 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
16752 an obconcat, otherwise allocate storage for the result. The CU argument is
16753 used to determine the language and hence, the appropriate separator. */
16755 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
16758 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
16759 int physname
, struct dwarf2_cu
*cu
)
16761 const char *lead
= "";
16764 if (suffix
== NULL
|| suffix
[0] == '\0'
16765 || prefix
== NULL
|| prefix
[0] == '\0')
16767 else if (cu
->language
== language_java
)
16769 else if (cu
->language
== language_fortran
&& physname
)
16771 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
16772 DW_AT_MIPS_linkage_name is preferred and used instead. */
16780 if (prefix
== NULL
)
16782 if (suffix
== NULL
)
16788 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
16790 strcpy (retval
, lead
);
16791 strcat (retval
, prefix
);
16792 strcat (retval
, sep
);
16793 strcat (retval
, suffix
);
16798 /* We have an obstack. */
16799 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
16803 /* Return sibling of die, NULL if no sibling. */
16805 static struct die_info
*
16806 sibling_die (struct die_info
*die
)
16808 return die
->sibling
;
16811 /* Get name of a die, return NULL if not found. */
16814 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
16815 struct obstack
*obstack
)
16817 if (name
&& cu
->language
== language_cplus
)
16819 char *canon_name
= cp_canonicalize_string (name
);
16821 if (canon_name
!= NULL
)
16823 if (strcmp (canon_name
, name
) != 0)
16824 name
= obsavestring (canon_name
, strlen (canon_name
),
16826 xfree (canon_name
);
16833 /* Get name of a die, return NULL if not found. */
16836 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
16838 struct attribute
*attr
;
16840 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
16841 if ((!attr
|| !DW_STRING (attr
))
16842 && die
->tag
!= DW_TAG_class_type
16843 && die
->tag
!= DW_TAG_interface_type
16844 && die
->tag
!= DW_TAG_structure_type
16845 && die
->tag
!= DW_TAG_union_type
)
16850 case DW_TAG_compile_unit
:
16851 case DW_TAG_partial_unit
:
16852 /* Compilation units have a DW_AT_name that is a filename, not
16853 a source language identifier. */
16854 case DW_TAG_enumeration_type
:
16855 case DW_TAG_enumerator
:
16856 /* These tags always have simple identifiers already; no need
16857 to canonicalize them. */
16858 return DW_STRING (attr
);
16860 case DW_TAG_subprogram
:
16861 /* Java constructors will all be named "<init>", so return
16862 the class name when we see this special case. */
16863 if (cu
->language
== language_java
16864 && DW_STRING (attr
) != NULL
16865 && strcmp (DW_STRING (attr
), "<init>") == 0)
16867 struct dwarf2_cu
*spec_cu
= cu
;
16868 struct die_info
*spec_die
;
16870 /* GCJ will output '<init>' for Java constructor names.
16871 For this special case, return the name of the parent class. */
16873 /* GCJ may output suprogram DIEs with AT_specification set.
16874 If so, use the name of the specified DIE. */
16875 spec_die
= die_specification (die
, &spec_cu
);
16876 if (spec_die
!= NULL
)
16877 return dwarf2_name (spec_die
, spec_cu
);
16882 if (die
->tag
== DW_TAG_class_type
)
16883 return dwarf2_name (die
, cu
);
16885 while (die
->tag
!= DW_TAG_compile_unit
16886 && die
->tag
!= DW_TAG_partial_unit
);
16890 case DW_TAG_class_type
:
16891 case DW_TAG_interface_type
:
16892 case DW_TAG_structure_type
:
16893 case DW_TAG_union_type
:
16894 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
16895 structures or unions. These were of the form "._%d" in GCC 4.1,
16896 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
16897 and GCC 4.4. We work around this problem by ignoring these. */
16898 if (attr
&& DW_STRING (attr
)
16899 && (strncmp (DW_STRING (attr
), "._", 2) == 0
16900 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
16903 /* GCC might emit a nameless typedef that has a linkage name. See
16904 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16905 if (!attr
|| DW_STRING (attr
) == NULL
)
16907 char *demangled
= NULL
;
16909 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
16911 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
16913 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
16916 /* Avoid demangling DW_STRING (attr) the second time on a second
16917 call for the same DIE. */
16918 if (!DW_STRING_IS_CANONICAL (attr
))
16919 demangled
= cplus_demangle (DW_STRING (attr
), DMGL_TYPES
);
16925 /* FIXME: we already did this for the partial symbol... */
16926 DW_STRING (attr
) = obsavestring (demangled
, strlen (demangled
),
16927 &cu
->objfile
->objfile_obstack
);
16928 DW_STRING_IS_CANONICAL (attr
) = 1;
16931 /* Strip any leading namespaces/classes, keep only the base name.
16932 DW_AT_name for named DIEs does not contain the prefixes. */
16933 base
= strrchr (DW_STRING (attr
), ':');
16934 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
16937 return DW_STRING (attr
);
16946 if (!DW_STRING_IS_CANONICAL (attr
))
16949 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
16950 &cu
->objfile
->objfile_obstack
);
16951 DW_STRING_IS_CANONICAL (attr
) = 1;
16953 return DW_STRING (attr
);
16956 /* Return the die that this die in an extension of, or NULL if there
16957 is none. *EXT_CU is the CU containing DIE on input, and the CU
16958 containing the return value on output. */
16960 static struct die_info
*
16961 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
16963 struct attribute
*attr
;
16965 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
16969 return follow_die_ref (die
, attr
, ext_cu
);
16972 /* Convert a DIE tag into its string name. */
16974 static const char *
16975 dwarf_tag_name (unsigned tag
)
16977 const char *name
= get_DW_TAG_name (tag
);
16980 return "DW_TAG_<unknown>";
16985 /* Convert a DWARF attribute code into its string name. */
16987 static const char *
16988 dwarf_attr_name (unsigned attr
)
16992 #ifdef MIPS /* collides with DW_AT_HP_block_index */
16993 if (attr
== DW_AT_MIPS_fde
)
16994 return "DW_AT_MIPS_fde";
16996 if (attr
== DW_AT_HP_block_index
)
16997 return "DW_AT_HP_block_index";
17000 name
= get_DW_AT_name (attr
);
17003 return "DW_AT_<unknown>";
17008 /* Convert a DWARF value form code into its string name. */
17010 static const char *
17011 dwarf_form_name (unsigned form
)
17013 const char *name
= get_DW_FORM_name (form
);
17016 return "DW_FORM_<unknown>";
17022 dwarf_bool_name (unsigned mybool
)
17030 /* Convert a DWARF type code into its string name. */
17032 static const char *
17033 dwarf_type_encoding_name (unsigned enc
)
17035 const char *name
= get_DW_ATE_name (enc
);
17038 return "DW_ATE_<unknown>";
17044 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
17048 print_spaces (indent
, f
);
17049 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
17050 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
17052 if (die
->parent
!= NULL
)
17054 print_spaces (indent
, f
);
17055 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
17056 die
->parent
->offset
.sect_off
);
17059 print_spaces (indent
, f
);
17060 fprintf_unfiltered (f
, " has children: %s\n",
17061 dwarf_bool_name (die
->child
!= NULL
));
17063 print_spaces (indent
, f
);
17064 fprintf_unfiltered (f
, " attributes:\n");
17066 for (i
= 0; i
< die
->num_attrs
; ++i
)
17068 print_spaces (indent
, f
);
17069 fprintf_unfiltered (f
, " %s (%s) ",
17070 dwarf_attr_name (die
->attrs
[i
].name
),
17071 dwarf_form_name (die
->attrs
[i
].form
));
17073 switch (die
->attrs
[i
].form
)
17076 case DW_FORM_GNU_addr_index
:
17077 fprintf_unfiltered (f
, "address: ");
17078 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
17080 case DW_FORM_block2
:
17081 case DW_FORM_block4
:
17082 case DW_FORM_block
:
17083 case DW_FORM_block1
:
17084 fprintf_unfiltered (f
, "block: size %s",
17085 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
17087 case DW_FORM_exprloc
:
17088 fprintf_unfiltered (f
, "expression: size %s",
17089 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
17091 case DW_FORM_ref_addr
:
17092 fprintf_unfiltered (f
, "ref address: ");
17093 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
17095 case DW_FORM_GNU_ref_alt
:
17096 fprintf_unfiltered (f
, "alt ref address: ");
17097 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
17103 case DW_FORM_ref_udata
:
17104 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
17105 (long) (DW_UNSND (&die
->attrs
[i
])));
17107 case DW_FORM_data1
:
17108 case DW_FORM_data2
:
17109 case DW_FORM_data4
:
17110 case DW_FORM_data8
:
17111 case DW_FORM_udata
:
17112 case DW_FORM_sdata
:
17113 fprintf_unfiltered (f
, "constant: %s",
17114 pulongest (DW_UNSND (&die
->attrs
[i
])));
17116 case DW_FORM_sec_offset
:
17117 fprintf_unfiltered (f
, "section offset: %s",
17118 pulongest (DW_UNSND (&die
->attrs
[i
])));
17120 case DW_FORM_ref_sig8
:
17121 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
17122 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
17123 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->per_cu
.offset
.sect_off
);
17125 fprintf_unfiltered (f
, "signatured type, offset: unknown");
17127 case DW_FORM_string
:
17129 case DW_FORM_GNU_str_index
:
17130 case DW_FORM_GNU_strp_alt
:
17131 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
17132 DW_STRING (&die
->attrs
[i
])
17133 ? DW_STRING (&die
->attrs
[i
]) : "",
17134 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
17137 if (DW_UNSND (&die
->attrs
[i
]))
17138 fprintf_unfiltered (f
, "flag: TRUE");
17140 fprintf_unfiltered (f
, "flag: FALSE");
17142 case DW_FORM_flag_present
:
17143 fprintf_unfiltered (f
, "flag: TRUE");
17145 case DW_FORM_indirect
:
17146 /* The reader will have reduced the indirect form to
17147 the "base form" so this form should not occur. */
17148 fprintf_unfiltered (f
,
17149 "unexpected attribute form: DW_FORM_indirect");
17152 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
17153 die
->attrs
[i
].form
);
17156 fprintf_unfiltered (f
, "\n");
17161 dump_die_for_error (struct die_info
*die
)
17163 dump_die_shallow (gdb_stderr
, 0, die
);
17167 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
17169 int indent
= level
* 4;
17171 gdb_assert (die
!= NULL
);
17173 if (level
>= max_level
)
17176 dump_die_shallow (f
, indent
, die
);
17178 if (die
->child
!= NULL
)
17180 print_spaces (indent
, f
);
17181 fprintf_unfiltered (f
, " Children:");
17182 if (level
+ 1 < max_level
)
17184 fprintf_unfiltered (f
, "\n");
17185 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
17189 fprintf_unfiltered (f
,
17190 " [not printed, max nesting level reached]\n");
17194 if (die
->sibling
!= NULL
&& level
> 0)
17196 dump_die_1 (f
, level
, max_level
, die
->sibling
);
17200 /* This is called from the pdie macro in gdbinit.in.
17201 It's not static so gcc will keep a copy callable from gdb. */
17204 dump_die (struct die_info
*die
, int max_level
)
17206 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
17210 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
17214 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
17220 /* DW_ADDR is always stored already as sect_offset; despite for the forms
17221 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
17224 is_ref_attr (struct attribute
*attr
)
17226 switch (attr
->form
)
17228 case DW_FORM_ref_addr
:
17233 case DW_FORM_ref_udata
:
17234 case DW_FORM_GNU_ref_alt
:
17241 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
17245 dwarf2_get_ref_die_offset (struct attribute
*attr
)
17247 sect_offset retval
= { DW_UNSND (attr
) };
17249 if (is_ref_attr (attr
))
17252 retval
.sect_off
= 0;
17253 complaint (&symfile_complaints
,
17254 _("unsupported die ref attribute form: '%s'"),
17255 dwarf_form_name (attr
->form
));
17259 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
17260 * the value held by the attribute is not constant. */
17263 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
17265 if (attr
->form
== DW_FORM_sdata
)
17266 return DW_SND (attr
);
17267 else if (attr
->form
== DW_FORM_udata
17268 || attr
->form
== DW_FORM_data1
17269 || attr
->form
== DW_FORM_data2
17270 || attr
->form
== DW_FORM_data4
17271 || attr
->form
== DW_FORM_data8
)
17272 return DW_UNSND (attr
);
17275 complaint (&symfile_complaints
,
17276 _("Attribute value is not a constant (%s)"),
17277 dwarf_form_name (attr
->form
));
17278 return default_value
;
17282 /* Follow reference or signature attribute ATTR of SRC_DIE.
17283 On entry *REF_CU is the CU of SRC_DIE.
17284 On exit *REF_CU is the CU of the result. */
17286 static struct die_info
*
17287 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
17288 struct dwarf2_cu
**ref_cu
)
17290 struct die_info
*die
;
17292 if (is_ref_attr (attr
))
17293 die
= follow_die_ref (src_die
, attr
, ref_cu
);
17294 else if (attr
->form
== DW_FORM_ref_sig8
)
17295 die
= follow_die_sig (src_die
, attr
, ref_cu
);
17298 dump_die_for_error (src_die
);
17299 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
17300 (*ref_cu
)->objfile
->name
);
17306 /* Follow reference OFFSET.
17307 On entry *REF_CU is the CU of the source die referencing OFFSET.
17308 On exit *REF_CU is the CU of the result.
17309 Returns NULL if OFFSET is invalid. */
17311 static struct die_info
*
17312 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
17313 struct dwarf2_cu
**ref_cu
)
17315 struct die_info temp_die
;
17316 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
17318 gdb_assert (cu
->per_cu
!= NULL
);
17322 if (cu
->per_cu
->is_debug_types
)
17324 /* .debug_types CUs cannot reference anything outside their CU.
17325 If they need to, they have to reference a signatured type via
17326 DW_FORM_ref_sig8. */
17327 if (! offset_in_cu_p (&cu
->header
, offset
))
17330 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
17331 || ! offset_in_cu_p (&cu
->header
, offset
))
17333 struct dwarf2_per_cu_data
*per_cu
;
17335 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
17338 /* If necessary, add it to the queue and load its DIEs. */
17339 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
17340 load_full_comp_unit (per_cu
, cu
->language
);
17342 target_cu
= per_cu
->cu
;
17344 else if (cu
->dies
== NULL
)
17346 /* We're loading full DIEs during partial symbol reading. */
17347 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
17348 load_full_comp_unit (cu
->per_cu
, language_minimal
);
17351 *ref_cu
= target_cu
;
17352 temp_die
.offset
= offset
;
17353 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
17356 /* Follow reference attribute ATTR of SRC_DIE.
17357 On entry *REF_CU is the CU of SRC_DIE.
17358 On exit *REF_CU is the CU of the result. */
17360 static struct die_info
*
17361 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
17362 struct dwarf2_cu
**ref_cu
)
17364 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
17365 struct dwarf2_cu
*cu
= *ref_cu
;
17366 struct die_info
*die
;
17368 die
= follow_die_offset (offset
,
17369 (attr
->form
== DW_FORM_GNU_ref_alt
17370 || cu
->per_cu
->is_dwz
),
17373 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
17374 "at 0x%x [in module %s]"),
17375 offset
.sect_off
, src_die
->offset
.sect_off
, cu
->objfile
->name
);
17380 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
17381 Returned value is intended for DW_OP_call*. Returned
17382 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
17384 struct dwarf2_locexpr_baton
17385 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
17386 struct dwarf2_per_cu_data
*per_cu
,
17387 CORE_ADDR (*get_frame_pc
) (void *baton
),
17390 struct dwarf2_cu
*cu
;
17391 struct die_info
*die
;
17392 struct attribute
*attr
;
17393 struct dwarf2_locexpr_baton retval
;
17395 dw2_setup (per_cu
->objfile
);
17397 if (per_cu
->cu
== NULL
)
17401 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
17403 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
17404 offset
.sect_off
, per_cu
->objfile
->name
);
17406 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
17409 /* DWARF: "If there is no such attribute, then there is no effect.".
17410 DATA is ignored if SIZE is 0. */
17412 retval
.data
= NULL
;
17415 else if (attr_form_is_section_offset (attr
))
17417 struct dwarf2_loclist_baton loclist_baton
;
17418 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
17421 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
17423 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
17425 retval
.size
= size
;
17429 if (!attr_form_is_block (attr
))
17430 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
17431 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
17432 offset
.sect_off
, per_cu
->objfile
->name
);
17434 retval
.data
= DW_BLOCK (attr
)->data
;
17435 retval
.size
= DW_BLOCK (attr
)->size
;
17437 retval
.per_cu
= cu
->per_cu
;
17439 age_cached_comp_units ();
17444 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
17447 struct dwarf2_locexpr_baton
17448 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
17449 struct dwarf2_per_cu_data
*per_cu
,
17450 CORE_ADDR (*get_frame_pc
) (void *baton
),
17453 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
17455 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
17458 /* Return the type of the DIE at DIE_OFFSET in the CU named by
17462 dwarf2_get_die_type (cu_offset die_offset
,
17463 struct dwarf2_per_cu_data
*per_cu
)
17465 sect_offset die_offset_sect
;
17467 dw2_setup (per_cu
->objfile
);
17469 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
17470 return get_die_type_at_offset (die_offset_sect
, per_cu
);
17473 /* Follow the signature attribute ATTR in SRC_DIE.
17474 On entry *REF_CU is the CU of SRC_DIE.
17475 On exit *REF_CU is the CU of the result. */
17477 static struct die_info
*
17478 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
17479 struct dwarf2_cu
**ref_cu
)
17481 struct objfile
*objfile
= (*ref_cu
)->objfile
;
17482 struct die_info temp_die
;
17483 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
17484 struct dwarf2_cu
*sig_cu
;
17485 struct die_info
*die
;
17487 /* sig_type will be NULL if the signatured type is missing from
17489 if (sig_type
== NULL
)
17490 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
17491 "at 0x%x [in module %s]"),
17492 src_die
->offset
.sect_off
, objfile
->name
);
17494 /* If necessary, add it to the queue and load its DIEs. */
17496 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
17497 read_signatured_type (sig_type
);
17499 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
17501 sig_cu
= sig_type
->per_cu
.cu
;
17502 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
17503 temp_die
.offset
= sig_type
->type_offset_in_section
;
17504 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
17505 temp_die
.offset
.sect_off
);
17512 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
17513 "from DIE at 0x%x [in module %s]"),
17514 temp_die
.offset
.sect_off
, src_die
->offset
.sect_off
, objfile
->name
);
17517 /* Given an offset of a signatured type, return its signatured_type. */
17519 static struct signatured_type
*
17520 lookup_signatured_type_at_offset (struct objfile
*objfile
,
17521 struct dwarf2_section_info
*section
,
17522 sect_offset offset
)
17524 gdb_byte
*info_ptr
= section
->buffer
+ offset
.sect_off
;
17525 unsigned int length
, initial_length_size
;
17526 unsigned int sig_offset
;
17527 struct signatured_type find_entry
, *sig_type
;
17529 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
17530 sig_offset
= (initial_length_size
17532 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
17533 + 1 /*address_size*/);
17534 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
17535 sig_type
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
17537 /* This is only used to lookup previously recorded types.
17538 If we didn't find it, it's our bug. */
17539 gdb_assert (sig_type
!= NULL
);
17540 gdb_assert (offset
.sect_off
== sig_type
->per_cu
.offset
.sect_off
);
17545 /* Load the DIEs associated with type unit PER_CU into memory. */
17548 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
17550 struct signatured_type
*sig_type
;
17552 /* Caller is responsible for ensuring type_unit_groups don't get here. */
17553 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
17555 /* We have the per_cu, but we need the signatured_type.
17556 Fortunately this is an easy translation. */
17557 gdb_assert (per_cu
->is_debug_types
);
17558 sig_type
= (struct signatured_type
*) per_cu
;
17560 gdb_assert (per_cu
->cu
== NULL
);
17562 read_signatured_type (sig_type
);
17564 gdb_assert (per_cu
->cu
!= NULL
);
17567 /* die_reader_func for read_signatured_type.
17568 This is identical to load_full_comp_unit_reader,
17569 but is kept separate for now. */
17572 read_signatured_type_reader (const struct die_reader_specs
*reader
,
17573 gdb_byte
*info_ptr
,
17574 struct die_info
*comp_unit_die
,
17578 struct dwarf2_cu
*cu
= reader
->cu
;
17580 gdb_assert (cu
->die_hash
== NULL
);
17582 htab_create_alloc_ex (cu
->header
.length
/ 12,
17586 &cu
->comp_unit_obstack
,
17587 hashtab_obstack_allocate
,
17588 dummy_obstack_deallocate
);
17591 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
17592 &info_ptr
, comp_unit_die
);
17593 cu
->dies
= comp_unit_die
;
17594 /* comp_unit_die is not stored in die_hash, no need. */
17596 /* We try not to read any attributes in this function, because not
17597 all CUs needed for references have been loaded yet, and symbol
17598 table processing isn't initialized. But we have to set the CU language,
17599 or we won't be able to build types correctly.
17600 Similarly, if we do not read the producer, we can not apply
17601 producer-specific interpretation. */
17602 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
17605 /* Read in a signatured type and build its CU and DIEs.
17606 If the type is a stub for the real type in a DWO file,
17607 read in the real type from the DWO file as well. */
17610 read_signatured_type (struct signatured_type
*sig_type
)
17612 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
17614 gdb_assert (per_cu
->is_debug_types
);
17615 gdb_assert (per_cu
->cu
== NULL
);
17617 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
17618 read_signatured_type_reader
, NULL
);
17621 /* Decode simple location descriptions.
17622 Given a pointer to a dwarf block that defines a location, compute
17623 the location and return the value.
17625 NOTE drow/2003-11-18: This function is called in two situations
17626 now: for the address of static or global variables (partial symbols
17627 only) and for offsets into structures which are expected to be
17628 (more or less) constant. The partial symbol case should go away,
17629 and only the constant case should remain. That will let this
17630 function complain more accurately. A few special modes are allowed
17631 without complaint for global variables (for instance, global
17632 register values and thread-local values).
17634 A location description containing no operations indicates that the
17635 object is optimized out. The return value is 0 for that case.
17636 FIXME drow/2003-11-16: No callers check for this case any more; soon all
17637 callers will only want a very basic result and this can become a
17640 Note that stack[0] is unused except as a default error return. */
17643 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
17645 struct objfile
*objfile
= cu
->objfile
;
17647 size_t size
= blk
->size
;
17648 gdb_byte
*data
= blk
->data
;
17649 CORE_ADDR stack
[64];
17651 unsigned int bytes_read
, unsnd
;
17657 stack
[++stacki
] = 0;
17696 stack
[++stacki
] = op
- DW_OP_lit0
;
17731 stack
[++stacki
] = op
- DW_OP_reg0
;
17733 dwarf2_complex_location_expr_complaint ();
17737 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
17739 stack
[++stacki
] = unsnd
;
17741 dwarf2_complex_location_expr_complaint ();
17745 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
17750 case DW_OP_const1u
:
17751 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
17755 case DW_OP_const1s
:
17756 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
17760 case DW_OP_const2u
:
17761 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
17765 case DW_OP_const2s
:
17766 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
17770 case DW_OP_const4u
:
17771 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
17775 case DW_OP_const4s
:
17776 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
17780 case DW_OP_const8u
:
17781 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
17786 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
17792 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
17797 stack
[stacki
+ 1] = stack
[stacki
];
17802 stack
[stacki
- 1] += stack
[stacki
];
17806 case DW_OP_plus_uconst
:
17807 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
17813 stack
[stacki
- 1] -= stack
[stacki
];
17818 /* If we're not the last op, then we definitely can't encode
17819 this using GDB's address_class enum. This is valid for partial
17820 global symbols, although the variable's address will be bogus
17823 dwarf2_complex_location_expr_complaint ();
17826 case DW_OP_GNU_push_tls_address
:
17827 /* The top of the stack has the offset from the beginning
17828 of the thread control block at which the variable is located. */
17829 /* Nothing should follow this operator, so the top of stack would
17831 /* This is valid for partial global symbols, but the variable's
17832 address will be bogus in the psymtab. Make it always at least
17833 non-zero to not look as a variable garbage collected by linker
17834 which have DW_OP_addr 0. */
17836 dwarf2_complex_location_expr_complaint ();
17840 case DW_OP_GNU_uninit
:
17843 case DW_OP_GNU_addr_index
:
17844 case DW_OP_GNU_const_index
:
17845 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
17852 const char *name
= get_DW_OP_name (op
);
17855 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
17858 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
17862 return (stack
[stacki
]);
17865 /* Enforce maximum stack depth of SIZE-1 to avoid writing
17866 outside of the allocated space. Also enforce minimum>0. */
17867 if (stacki
>= ARRAY_SIZE (stack
) - 1)
17869 complaint (&symfile_complaints
,
17870 _("location description stack overflow"));
17876 complaint (&symfile_complaints
,
17877 _("location description stack underflow"));
17881 return (stack
[stacki
]);
17884 /* memory allocation interface */
17886 static struct dwarf_block
*
17887 dwarf_alloc_block (struct dwarf2_cu
*cu
)
17889 struct dwarf_block
*blk
;
17891 blk
= (struct dwarf_block
*)
17892 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
17896 static struct die_info
*
17897 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
17899 struct die_info
*die
;
17900 size_t size
= sizeof (struct die_info
);
17903 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
17905 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
17906 memset (die
, 0, sizeof (struct die_info
));
17911 /* Macro support. */
17913 /* Return the full name of file number I in *LH's file name table.
17914 Use COMP_DIR as the name of the current directory of the
17915 compilation. The result is allocated using xmalloc; the caller is
17916 responsible for freeing it. */
17918 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
17920 /* Is the file number a valid index into the line header's file name
17921 table? Remember that file numbers start with one, not zero. */
17922 if (1 <= file
&& file
<= lh
->num_file_names
)
17924 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
17926 if (IS_ABSOLUTE_PATH (fe
->name
))
17927 return xstrdup (fe
->name
);
17935 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17941 dir_len
= strlen (dir
);
17942 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
17943 strcpy (full_name
, dir
);
17944 full_name
[dir_len
] = '/';
17945 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
17949 return xstrdup (fe
->name
);
17954 /* The compiler produced a bogus file number. We can at least
17955 record the macro definitions made in the file, even if we
17956 won't be able to find the file by name. */
17957 char fake_name
[80];
17959 xsnprintf (fake_name
, sizeof (fake_name
),
17960 "<bad macro file number %d>", file
);
17962 complaint (&symfile_complaints
,
17963 _("bad file number in macro information (%d)"),
17966 return xstrdup (fake_name
);
17971 static struct macro_source_file
*
17972 macro_start_file (int file
, int line
,
17973 struct macro_source_file
*current_file
,
17974 const char *comp_dir
,
17975 struct line_header
*lh
, struct objfile
*objfile
)
17977 /* The full name of this source file. */
17978 char *full_name
= file_full_name (file
, lh
, comp_dir
);
17980 /* We don't create a macro table for this compilation unit
17981 at all until we actually get a filename. */
17982 if (! pending_macros
)
17983 pending_macros
= new_macro_table (&objfile
->per_bfd
->storage_obstack
,
17984 objfile
->per_bfd
->macro_cache
);
17986 if (! current_file
)
17988 /* If we have no current file, then this must be the start_file
17989 directive for the compilation unit's main source file. */
17990 current_file
= macro_set_main (pending_macros
, full_name
);
17991 macro_define_special (pending_macros
);
17994 current_file
= macro_include (current_file
, line
, full_name
);
17998 return current_file
;
18002 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
18003 followed by a null byte. */
18005 copy_string (const char *buf
, int len
)
18007 char *s
= xmalloc (len
+ 1);
18009 memcpy (s
, buf
, len
);
18015 static const char *
18016 consume_improper_spaces (const char *p
, const char *body
)
18020 complaint (&symfile_complaints
,
18021 _("macro definition contains spaces "
18022 "in formal argument list:\n`%s'"),
18034 parse_macro_definition (struct macro_source_file
*file
, int line
,
18039 /* The body string takes one of two forms. For object-like macro
18040 definitions, it should be:
18042 <macro name> " " <definition>
18044 For function-like macro definitions, it should be:
18046 <macro name> "() " <definition>
18048 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
18050 Spaces may appear only where explicitly indicated, and in the
18053 The Dwarf 2 spec says that an object-like macro's name is always
18054 followed by a space, but versions of GCC around March 2002 omit
18055 the space when the macro's definition is the empty string.
18057 The Dwarf 2 spec says that there should be no spaces between the
18058 formal arguments in a function-like macro's formal argument list,
18059 but versions of GCC around March 2002 include spaces after the
18063 /* Find the extent of the macro name. The macro name is terminated
18064 by either a space or null character (for an object-like macro) or
18065 an opening paren (for a function-like macro). */
18066 for (p
= body
; *p
; p
++)
18067 if (*p
== ' ' || *p
== '(')
18070 if (*p
== ' ' || *p
== '\0')
18072 /* It's an object-like macro. */
18073 int name_len
= p
- body
;
18074 char *name
= copy_string (body
, name_len
);
18075 const char *replacement
;
18078 replacement
= body
+ name_len
+ 1;
18081 dwarf2_macro_malformed_definition_complaint (body
);
18082 replacement
= body
+ name_len
;
18085 macro_define_object (file
, line
, name
, replacement
);
18089 else if (*p
== '(')
18091 /* It's a function-like macro. */
18092 char *name
= copy_string (body
, p
- body
);
18095 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
18099 p
= consume_improper_spaces (p
, body
);
18101 /* Parse the formal argument list. */
18102 while (*p
&& *p
!= ')')
18104 /* Find the extent of the current argument name. */
18105 const char *arg_start
= p
;
18107 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
18110 if (! *p
|| p
== arg_start
)
18111 dwarf2_macro_malformed_definition_complaint (body
);
18114 /* Make sure argv has room for the new argument. */
18115 if (argc
>= argv_size
)
18118 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
18121 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
18124 p
= consume_improper_spaces (p
, body
);
18126 /* Consume the comma, if present. */
18131 p
= consume_improper_spaces (p
, body
);
18140 /* Perfectly formed definition, no complaints. */
18141 macro_define_function (file
, line
, name
,
18142 argc
, (const char **) argv
,
18144 else if (*p
== '\0')
18146 /* Complain, but do define it. */
18147 dwarf2_macro_malformed_definition_complaint (body
);
18148 macro_define_function (file
, line
, name
,
18149 argc
, (const char **) argv
,
18153 /* Just complain. */
18154 dwarf2_macro_malformed_definition_complaint (body
);
18157 /* Just complain. */
18158 dwarf2_macro_malformed_definition_complaint (body
);
18164 for (i
= 0; i
< argc
; i
++)
18170 dwarf2_macro_malformed_definition_complaint (body
);
18173 /* Skip some bytes from BYTES according to the form given in FORM.
18174 Returns the new pointer. */
18177 skip_form_bytes (bfd
*abfd
, gdb_byte
*bytes
, gdb_byte
*buffer_end
,
18178 enum dwarf_form form
,
18179 unsigned int offset_size
,
18180 struct dwarf2_section_info
*section
)
18182 unsigned int bytes_read
;
18186 case DW_FORM_data1
:
18191 case DW_FORM_data2
:
18195 case DW_FORM_data4
:
18199 case DW_FORM_data8
:
18203 case DW_FORM_string
:
18204 read_direct_string (abfd
, bytes
, &bytes_read
);
18205 bytes
+= bytes_read
;
18208 case DW_FORM_sec_offset
:
18210 case DW_FORM_GNU_strp_alt
:
18211 bytes
+= offset_size
;
18214 case DW_FORM_block
:
18215 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
18216 bytes
+= bytes_read
;
18219 case DW_FORM_block1
:
18220 bytes
+= 1 + read_1_byte (abfd
, bytes
);
18222 case DW_FORM_block2
:
18223 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
18225 case DW_FORM_block4
:
18226 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
18229 case DW_FORM_sdata
:
18230 case DW_FORM_udata
:
18231 case DW_FORM_GNU_addr_index
:
18232 case DW_FORM_GNU_str_index
:
18233 bytes
= (gdb_byte
*) gdb_skip_leb128 (bytes
, buffer_end
);
18236 dwarf2_section_buffer_overflow_complaint (section
);
18244 complaint (&symfile_complaints
,
18245 _("invalid form 0x%x in `%s'"),
18247 section
->asection
->name
);
18255 /* A helper for dwarf_decode_macros that handles skipping an unknown
18256 opcode. Returns an updated pointer to the macro data buffer; or,
18257 on error, issues a complaint and returns NULL. */
18260 skip_unknown_opcode (unsigned int opcode
,
18261 gdb_byte
**opcode_definitions
,
18262 gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
18264 unsigned int offset_size
,
18265 struct dwarf2_section_info
*section
)
18267 unsigned int bytes_read
, i
;
18271 if (opcode_definitions
[opcode
] == NULL
)
18273 complaint (&symfile_complaints
,
18274 _("unrecognized DW_MACFINO opcode 0x%x"),
18279 defn
= opcode_definitions
[opcode
];
18280 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
18281 defn
+= bytes_read
;
18283 for (i
= 0; i
< arg
; ++i
)
18285 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
18287 if (mac_ptr
== NULL
)
18289 /* skip_form_bytes already issued the complaint. */
18297 /* A helper function which parses the header of a macro section.
18298 If the macro section is the extended (for now called "GNU") type,
18299 then this updates *OFFSET_SIZE. Returns a pointer to just after
18300 the header, or issues a complaint and returns NULL on error. */
18303 dwarf_parse_macro_header (gdb_byte
**opcode_definitions
,
18306 unsigned int *offset_size
,
18307 int section_is_gnu
)
18309 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
18311 if (section_is_gnu
)
18313 unsigned int version
, flags
;
18315 version
= read_2_bytes (abfd
, mac_ptr
);
18318 complaint (&symfile_complaints
,
18319 _("unrecognized version `%d' in .debug_macro section"),
18325 flags
= read_1_byte (abfd
, mac_ptr
);
18327 *offset_size
= (flags
& 1) ? 8 : 4;
18329 if ((flags
& 2) != 0)
18330 /* We don't need the line table offset. */
18331 mac_ptr
+= *offset_size
;
18333 /* Vendor opcode descriptions. */
18334 if ((flags
& 4) != 0)
18336 unsigned int i
, count
;
18338 count
= read_1_byte (abfd
, mac_ptr
);
18340 for (i
= 0; i
< count
; ++i
)
18342 unsigned int opcode
, bytes_read
;
18345 opcode
= read_1_byte (abfd
, mac_ptr
);
18347 opcode_definitions
[opcode
] = mac_ptr
;
18348 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18349 mac_ptr
+= bytes_read
;
18358 /* A helper for dwarf_decode_macros that handles the GNU extensions,
18359 including DW_MACRO_GNU_transparent_include. */
18362 dwarf_decode_macro_bytes (bfd
*abfd
, gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
18363 struct macro_source_file
*current_file
,
18364 struct line_header
*lh
, char *comp_dir
,
18365 struct dwarf2_section_info
*section
,
18366 int section_is_gnu
, int section_is_dwz
,
18367 unsigned int offset_size
,
18368 struct objfile
*objfile
,
18369 htab_t include_hash
)
18371 enum dwarf_macro_record_type macinfo_type
;
18372 int at_commandline
;
18373 gdb_byte
*opcode_definitions
[256];
18375 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
18376 &offset_size
, section_is_gnu
);
18377 if (mac_ptr
== NULL
)
18379 /* We already issued a complaint. */
18383 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
18384 GDB is still reading the definitions from command line. First
18385 DW_MACINFO_start_file will need to be ignored as it was already executed
18386 to create CURRENT_FILE for the main source holding also the command line
18387 definitions. On first met DW_MACINFO_start_file this flag is reset to
18388 normally execute all the remaining DW_MACINFO_start_file macinfos. */
18390 at_commandline
= 1;
18394 /* Do we at least have room for a macinfo type byte? */
18395 if (mac_ptr
>= mac_end
)
18397 dwarf2_section_buffer_overflow_complaint (section
);
18401 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
18404 /* Note that we rely on the fact that the corresponding GNU and
18405 DWARF constants are the same. */
18406 switch (macinfo_type
)
18408 /* A zero macinfo type indicates the end of the macro
18413 case DW_MACRO_GNU_define
:
18414 case DW_MACRO_GNU_undef
:
18415 case DW_MACRO_GNU_define_indirect
:
18416 case DW_MACRO_GNU_undef_indirect
:
18417 case DW_MACRO_GNU_define_indirect_alt
:
18418 case DW_MACRO_GNU_undef_indirect_alt
:
18420 unsigned int bytes_read
;
18425 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18426 mac_ptr
+= bytes_read
;
18428 if (macinfo_type
== DW_MACRO_GNU_define
18429 || macinfo_type
== DW_MACRO_GNU_undef
)
18431 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18432 mac_ptr
+= bytes_read
;
18436 LONGEST str_offset
;
18438 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
18439 mac_ptr
+= offset_size
;
18441 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
18442 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
18445 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
18447 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
18450 body
= read_indirect_string_at_offset (abfd
, str_offset
);
18453 is_define
= (macinfo_type
== DW_MACRO_GNU_define
18454 || macinfo_type
== DW_MACRO_GNU_define_indirect
18455 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
18456 if (! current_file
)
18458 /* DWARF violation as no main source is present. */
18459 complaint (&symfile_complaints
,
18460 _("debug info with no main source gives macro %s "
18462 is_define
? _("definition") : _("undefinition"),
18466 if ((line
== 0 && !at_commandline
)
18467 || (line
!= 0 && at_commandline
))
18468 complaint (&symfile_complaints
,
18469 _("debug info gives %s macro %s with %s line %d: %s"),
18470 at_commandline
? _("command-line") : _("in-file"),
18471 is_define
? _("definition") : _("undefinition"),
18472 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
18475 parse_macro_definition (current_file
, line
, body
);
18478 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
18479 || macinfo_type
== DW_MACRO_GNU_undef_indirect
18480 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
18481 macro_undef (current_file
, line
, body
);
18486 case DW_MACRO_GNU_start_file
:
18488 unsigned int bytes_read
;
18491 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18492 mac_ptr
+= bytes_read
;
18493 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18494 mac_ptr
+= bytes_read
;
18496 if ((line
== 0 && !at_commandline
)
18497 || (line
!= 0 && at_commandline
))
18498 complaint (&symfile_complaints
,
18499 _("debug info gives source %d included "
18500 "from %s at %s line %d"),
18501 file
, at_commandline
? _("command-line") : _("file"),
18502 line
== 0 ? _("zero") : _("non-zero"), line
);
18504 if (at_commandline
)
18506 /* This DW_MACRO_GNU_start_file was executed in the
18508 at_commandline
= 0;
18511 current_file
= macro_start_file (file
, line
,
18512 current_file
, comp_dir
,
18517 case DW_MACRO_GNU_end_file
:
18518 if (! current_file
)
18519 complaint (&symfile_complaints
,
18520 _("macro debug info has an unmatched "
18521 "`close_file' directive"));
18524 current_file
= current_file
->included_by
;
18525 if (! current_file
)
18527 enum dwarf_macro_record_type next_type
;
18529 /* GCC circa March 2002 doesn't produce the zero
18530 type byte marking the end of the compilation
18531 unit. Complain if it's not there, but exit no
18534 /* Do we at least have room for a macinfo type byte? */
18535 if (mac_ptr
>= mac_end
)
18537 dwarf2_section_buffer_overflow_complaint (section
);
18541 /* We don't increment mac_ptr here, so this is just
18543 next_type
= read_1_byte (abfd
, mac_ptr
);
18544 if (next_type
!= 0)
18545 complaint (&symfile_complaints
,
18546 _("no terminating 0-type entry for "
18547 "macros in `.debug_macinfo' section"));
18554 case DW_MACRO_GNU_transparent_include
:
18555 case DW_MACRO_GNU_transparent_include_alt
:
18559 bfd
*include_bfd
= abfd
;
18560 struct dwarf2_section_info
*include_section
= section
;
18561 struct dwarf2_section_info alt_section
;
18562 gdb_byte
*include_mac_end
= mac_end
;
18563 int is_dwz
= section_is_dwz
;
18564 gdb_byte
*new_mac_ptr
;
18566 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
18567 mac_ptr
+= offset_size
;
18569 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
18571 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
18573 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
18576 include_bfd
= dwz
->macro
.asection
->owner
;
18577 include_section
= &dwz
->macro
;
18578 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
18582 new_mac_ptr
= include_section
->buffer
+ offset
;
18583 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
18587 /* This has actually happened; see
18588 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
18589 complaint (&symfile_complaints
,
18590 _("recursive DW_MACRO_GNU_transparent_include in "
18591 ".debug_macro section"));
18595 *slot
= new_mac_ptr
;
18597 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
18598 include_mac_end
, current_file
,
18600 section
, section_is_gnu
, is_dwz
,
18601 offset_size
, objfile
, include_hash
);
18603 htab_remove_elt (include_hash
, new_mac_ptr
);
18608 case DW_MACINFO_vendor_ext
:
18609 if (!section_is_gnu
)
18611 unsigned int bytes_read
;
18614 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18615 mac_ptr
+= bytes_read
;
18616 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18617 mac_ptr
+= bytes_read
;
18619 /* We don't recognize any vendor extensions. */
18625 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
18626 mac_ptr
, mac_end
, abfd
, offset_size
,
18628 if (mac_ptr
== NULL
)
18632 } while (macinfo_type
!= 0);
18636 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
18637 char *comp_dir
, int section_is_gnu
)
18639 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18640 struct line_header
*lh
= cu
->line_header
;
18642 gdb_byte
*mac_ptr
, *mac_end
;
18643 struct macro_source_file
*current_file
= 0;
18644 enum dwarf_macro_record_type macinfo_type
;
18645 unsigned int offset_size
= cu
->header
.offset_size
;
18646 gdb_byte
*opcode_definitions
[256];
18647 struct cleanup
*cleanup
;
18648 htab_t include_hash
;
18650 struct dwarf2_section_info
*section
;
18651 const char *section_name
;
18653 if (cu
->dwo_unit
!= NULL
)
18655 if (section_is_gnu
)
18657 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
18658 section_name
= ".debug_macro.dwo";
18662 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
18663 section_name
= ".debug_macinfo.dwo";
18668 if (section_is_gnu
)
18670 section
= &dwarf2_per_objfile
->macro
;
18671 section_name
= ".debug_macro";
18675 section
= &dwarf2_per_objfile
->macinfo
;
18676 section_name
= ".debug_macinfo";
18680 dwarf2_read_section (objfile
, section
);
18681 if (section
->buffer
== NULL
)
18683 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
18686 abfd
= section
->asection
->owner
;
18688 /* First pass: Find the name of the base filename.
18689 This filename is needed in order to process all macros whose definition
18690 (or undefinition) comes from the command line. These macros are defined
18691 before the first DW_MACINFO_start_file entry, and yet still need to be
18692 associated to the base file.
18694 To determine the base file name, we scan the macro definitions until we
18695 reach the first DW_MACINFO_start_file entry. We then initialize
18696 CURRENT_FILE accordingly so that any macro definition found before the
18697 first DW_MACINFO_start_file can still be associated to the base file. */
18699 mac_ptr
= section
->buffer
+ offset
;
18700 mac_end
= section
->buffer
+ section
->size
;
18702 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
18703 &offset_size
, section_is_gnu
);
18704 if (mac_ptr
== NULL
)
18706 /* We already issued a complaint. */
18712 /* Do we at least have room for a macinfo type byte? */
18713 if (mac_ptr
>= mac_end
)
18715 /* Complaint is printed during the second pass as GDB will probably
18716 stop the first pass earlier upon finding
18717 DW_MACINFO_start_file. */
18721 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
18724 /* Note that we rely on the fact that the corresponding GNU and
18725 DWARF constants are the same. */
18726 switch (macinfo_type
)
18728 /* A zero macinfo type indicates the end of the macro
18733 case DW_MACRO_GNU_define
:
18734 case DW_MACRO_GNU_undef
:
18735 /* Only skip the data by MAC_PTR. */
18737 unsigned int bytes_read
;
18739 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18740 mac_ptr
+= bytes_read
;
18741 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18742 mac_ptr
+= bytes_read
;
18746 case DW_MACRO_GNU_start_file
:
18748 unsigned int bytes_read
;
18751 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18752 mac_ptr
+= bytes_read
;
18753 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18754 mac_ptr
+= bytes_read
;
18756 current_file
= macro_start_file (file
, line
, current_file
,
18757 comp_dir
, lh
, objfile
);
18761 case DW_MACRO_GNU_end_file
:
18762 /* No data to skip by MAC_PTR. */
18765 case DW_MACRO_GNU_define_indirect
:
18766 case DW_MACRO_GNU_undef_indirect
:
18767 case DW_MACRO_GNU_define_indirect_alt
:
18768 case DW_MACRO_GNU_undef_indirect_alt
:
18770 unsigned int bytes_read
;
18772 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18773 mac_ptr
+= bytes_read
;
18774 mac_ptr
+= offset_size
;
18778 case DW_MACRO_GNU_transparent_include
:
18779 case DW_MACRO_GNU_transparent_include_alt
:
18780 /* Note that, according to the spec, a transparent include
18781 chain cannot call DW_MACRO_GNU_start_file. So, we can just
18782 skip this opcode. */
18783 mac_ptr
+= offset_size
;
18786 case DW_MACINFO_vendor_ext
:
18787 /* Only skip the data by MAC_PTR. */
18788 if (!section_is_gnu
)
18790 unsigned int bytes_read
;
18792 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18793 mac_ptr
+= bytes_read
;
18794 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18795 mac_ptr
+= bytes_read
;
18800 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
18801 mac_ptr
, mac_end
, abfd
, offset_size
,
18803 if (mac_ptr
== NULL
)
18807 } while (macinfo_type
!= 0 && current_file
== NULL
);
18809 /* Second pass: Process all entries.
18811 Use the AT_COMMAND_LINE flag to determine whether we are still processing
18812 command-line macro definitions/undefinitions. This flag is unset when we
18813 reach the first DW_MACINFO_start_file entry. */
18815 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
18816 NULL
, xcalloc
, xfree
);
18817 cleanup
= make_cleanup_htab_delete (include_hash
);
18818 mac_ptr
= section
->buffer
+ offset
;
18819 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
18821 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
18822 current_file
, lh
, comp_dir
, section
,
18824 offset_size
, objfile
, include_hash
);
18825 do_cleanups (cleanup
);
18828 /* Check if the attribute's form is a DW_FORM_block*
18829 if so return true else false. */
18832 attr_form_is_block (struct attribute
*attr
)
18834 return (attr
== NULL
? 0 :
18835 attr
->form
== DW_FORM_block1
18836 || attr
->form
== DW_FORM_block2
18837 || attr
->form
== DW_FORM_block4
18838 || attr
->form
== DW_FORM_block
18839 || attr
->form
== DW_FORM_exprloc
);
18842 /* Return non-zero if ATTR's value is a section offset --- classes
18843 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
18844 You may use DW_UNSND (attr) to retrieve such offsets.
18846 Section 7.5.4, "Attribute Encodings", explains that no attribute
18847 may have a value that belongs to more than one of these classes; it
18848 would be ambiguous if we did, because we use the same forms for all
18852 attr_form_is_section_offset (struct attribute
*attr
)
18854 return (attr
->form
== DW_FORM_data4
18855 || attr
->form
== DW_FORM_data8
18856 || attr
->form
== DW_FORM_sec_offset
);
18859 /* Return non-zero if ATTR's value falls in the 'constant' class, or
18860 zero otherwise. When this function returns true, you can apply
18861 dwarf2_get_attr_constant_value to it.
18863 However, note that for some attributes you must check
18864 attr_form_is_section_offset before using this test. DW_FORM_data4
18865 and DW_FORM_data8 are members of both the constant class, and of
18866 the classes that contain offsets into other debug sections
18867 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
18868 that, if an attribute's can be either a constant or one of the
18869 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
18870 taken as section offsets, not constants. */
18873 attr_form_is_constant (struct attribute
*attr
)
18875 switch (attr
->form
)
18877 case DW_FORM_sdata
:
18878 case DW_FORM_udata
:
18879 case DW_FORM_data1
:
18880 case DW_FORM_data2
:
18881 case DW_FORM_data4
:
18882 case DW_FORM_data8
:
18889 /* Return the .debug_loc section to use for CU.
18890 For DWO files use .debug_loc.dwo. */
18892 static struct dwarf2_section_info
*
18893 cu_debug_loc_section (struct dwarf2_cu
*cu
)
18896 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
18897 return &dwarf2_per_objfile
->loc
;
18900 /* A helper function that fills in a dwarf2_loclist_baton. */
18903 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
18904 struct dwarf2_loclist_baton
*baton
,
18905 struct attribute
*attr
)
18907 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18909 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
18911 baton
->per_cu
= cu
->per_cu
;
18912 gdb_assert (baton
->per_cu
);
18913 /* We don't know how long the location list is, but make sure we
18914 don't run off the edge of the section. */
18915 baton
->size
= section
->size
- DW_UNSND (attr
);
18916 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
18917 baton
->base_address
= cu
->base_address
;
18918 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
18922 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
18923 struct dwarf2_cu
*cu
)
18925 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18926 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18928 if (attr_form_is_section_offset (attr
)
18929 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
18930 the section. If so, fall through to the complaint in the
18932 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
18934 struct dwarf2_loclist_baton
*baton
;
18936 baton
= obstack_alloc (&objfile
->objfile_obstack
,
18937 sizeof (struct dwarf2_loclist_baton
));
18939 fill_in_loclist_baton (cu
, baton
, attr
);
18941 if (cu
->base_known
== 0)
18942 complaint (&symfile_complaints
,
18943 _("Location list used without "
18944 "specifying the CU base address."));
18946 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
18947 SYMBOL_LOCATION_BATON (sym
) = baton
;
18951 struct dwarf2_locexpr_baton
*baton
;
18953 baton
= obstack_alloc (&objfile
->objfile_obstack
,
18954 sizeof (struct dwarf2_locexpr_baton
));
18955 baton
->per_cu
= cu
->per_cu
;
18956 gdb_assert (baton
->per_cu
);
18958 if (attr_form_is_block (attr
))
18960 /* Note that we're just copying the block's data pointer
18961 here, not the actual data. We're still pointing into the
18962 info_buffer for SYM's objfile; right now we never release
18963 that buffer, but when we do clean up properly this may
18965 baton
->size
= DW_BLOCK (attr
)->size
;
18966 baton
->data
= DW_BLOCK (attr
)->data
;
18970 dwarf2_invalid_attrib_class_complaint ("location description",
18971 SYMBOL_NATURAL_NAME (sym
));
18975 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
18976 SYMBOL_LOCATION_BATON (sym
) = baton
;
18980 /* Return the OBJFILE associated with the compilation unit CU. If CU
18981 came from a separate debuginfo file, then the master objfile is
18985 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
18987 struct objfile
*objfile
= per_cu
->objfile
;
18989 /* Return the master objfile, so that we can report and look up the
18990 correct file containing this variable. */
18991 if (objfile
->separate_debug_objfile_backlink
)
18992 objfile
= objfile
->separate_debug_objfile_backlink
;
18997 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
18998 (CU_HEADERP is unused in such case) or prepare a temporary copy at
18999 CU_HEADERP first. */
19001 static const struct comp_unit_head
*
19002 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
19003 struct dwarf2_per_cu_data
*per_cu
)
19005 gdb_byte
*info_ptr
;
19008 return &per_cu
->cu
->header
;
19010 info_ptr
= per_cu
->info_or_types_section
->buffer
+ per_cu
->offset
.sect_off
;
19012 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
19013 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
19018 /* Return the address size given in the compilation unit header for CU. */
19021 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
19023 struct comp_unit_head cu_header_local
;
19024 const struct comp_unit_head
*cu_headerp
;
19026 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19028 return cu_headerp
->addr_size
;
19031 /* Return the offset size given in the compilation unit header for CU. */
19034 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
19036 struct comp_unit_head cu_header_local
;
19037 const struct comp_unit_head
*cu_headerp
;
19039 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19041 return cu_headerp
->offset_size
;
19044 /* See its dwarf2loc.h declaration. */
19047 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
19049 struct comp_unit_head cu_header_local
;
19050 const struct comp_unit_head
*cu_headerp
;
19052 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19054 if (cu_headerp
->version
== 2)
19055 return cu_headerp
->addr_size
;
19057 return cu_headerp
->offset_size
;
19060 /* Return the text offset of the CU. The returned offset comes from
19061 this CU's objfile. If this objfile came from a separate debuginfo
19062 file, then the offset may be different from the corresponding
19063 offset in the parent objfile. */
19066 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
19068 struct objfile
*objfile
= per_cu
->objfile
;
19070 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
19073 /* Locate the .debug_info compilation unit from CU's objfile which contains
19074 the DIE at OFFSET. Raises an error on failure. */
19076 static struct dwarf2_per_cu_data
*
19077 dwarf2_find_containing_comp_unit (sect_offset offset
,
19078 unsigned int offset_in_dwz
,
19079 struct objfile
*objfile
)
19081 struct dwarf2_per_cu_data
*this_cu
;
19083 const sect_offset
*cu_off
;
19086 high
= dwarf2_per_objfile
->n_comp_units
- 1;
19089 struct dwarf2_per_cu_data
*mid_cu
;
19090 int mid
= low
+ (high
- low
) / 2;
19092 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
19093 cu_off
= &mid_cu
->offset
;
19094 if (mid_cu
->is_dwz
> offset_in_dwz
19095 || (mid_cu
->is_dwz
== offset_in_dwz
19096 && cu_off
->sect_off
>= offset
.sect_off
))
19101 gdb_assert (low
== high
);
19102 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
19103 cu_off
= &this_cu
->offset
;
19104 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
19106 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
19107 error (_("Dwarf Error: could not find partial DIE containing "
19108 "offset 0x%lx [in module %s]"),
19109 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
19111 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
19112 <= offset
.sect_off
);
19113 return dwarf2_per_objfile
->all_comp_units
[low
-1];
19117 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
19118 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
19119 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
19120 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
19121 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
19126 /* Initialize dwarf2_cu CU, owned by PER_CU. */
19129 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
19131 memset (cu
, 0, sizeof (*cu
));
19133 cu
->per_cu
= per_cu
;
19134 cu
->objfile
= per_cu
->objfile
;
19135 obstack_init (&cu
->comp_unit_obstack
);
19138 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
19141 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
19142 enum language pretend_language
)
19144 struct attribute
*attr
;
19146 /* Set the language we're debugging. */
19147 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
19149 set_cu_language (DW_UNSND (attr
), cu
);
19152 cu
->language
= pretend_language
;
19153 cu
->language_defn
= language_def (cu
->language
);
19156 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
19158 cu
->producer
= DW_STRING (attr
);
19161 /* Release one cached compilation unit, CU. We unlink it from the tree
19162 of compilation units, but we don't remove it from the read_in_chain;
19163 the caller is responsible for that.
19164 NOTE: DATA is a void * because this function is also used as a
19165 cleanup routine. */
19168 free_heap_comp_unit (void *data
)
19170 struct dwarf2_cu
*cu
= data
;
19172 gdb_assert (cu
->per_cu
!= NULL
);
19173 cu
->per_cu
->cu
= NULL
;
19176 obstack_free (&cu
->comp_unit_obstack
, NULL
);
19181 /* This cleanup function is passed the address of a dwarf2_cu on the stack
19182 when we're finished with it. We can't free the pointer itself, but be
19183 sure to unlink it from the cache. Also release any associated storage. */
19186 free_stack_comp_unit (void *data
)
19188 struct dwarf2_cu
*cu
= data
;
19190 gdb_assert (cu
->per_cu
!= NULL
);
19191 cu
->per_cu
->cu
= NULL
;
19194 obstack_free (&cu
->comp_unit_obstack
, NULL
);
19195 cu
->partial_dies
= NULL
;
19198 /* Free all cached compilation units. */
19201 free_cached_comp_units (void *data
)
19203 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19205 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19206 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19207 while (per_cu
!= NULL
)
19209 struct dwarf2_per_cu_data
*next_cu
;
19211 next_cu
= per_cu
->cu
->read_in_chain
;
19213 free_heap_comp_unit (per_cu
->cu
);
19214 *last_chain
= next_cu
;
19220 /* Increase the age counter on each cached compilation unit, and free
19221 any that are too old. */
19224 age_cached_comp_units (void)
19226 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19228 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
19229 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19230 while (per_cu
!= NULL
)
19232 per_cu
->cu
->last_used
++;
19233 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
19234 dwarf2_mark (per_cu
->cu
);
19235 per_cu
= per_cu
->cu
->read_in_chain
;
19238 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19239 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19240 while (per_cu
!= NULL
)
19242 struct dwarf2_per_cu_data
*next_cu
;
19244 next_cu
= per_cu
->cu
->read_in_chain
;
19246 if (!per_cu
->cu
->mark
)
19248 free_heap_comp_unit (per_cu
->cu
);
19249 *last_chain
= next_cu
;
19252 last_chain
= &per_cu
->cu
->read_in_chain
;
19258 /* Remove a single compilation unit from the cache. */
19261 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
19263 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19265 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19266 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19267 while (per_cu
!= NULL
)
19269 struct dwarf2_per_cu_data
*next_cu
;
19271 next_cu
= per_cu
->cu
->read_in_chain
;
19273 if (per_cu
== target_per_cu
)
19275 free_heap_comp_unit (per_cu
->cu
);
19277 *last_chain
= next_cu
;
19281 last_chain
= &per_cu
->cu
->read_in_chain
;
19287 /* Release all extra memory associated with OBJFILE. */
19290 dwarf2_free_objfile (struct objfile
*objfile
)
19292 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
19294 if (dwarf2_per_objfile
== NULL
)
19297 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
19298 free_cached_comp_units (NULL
);
19300 if (dwarf2_per_objfile
->quick_file_names_table
)
19301 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
19303 /* Everything else should be on the objfile obstack. */
19306 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
19307 We store these in a hash table separate from the DIEs, and preserve them
19308 when the DIEs are flushed out of cache.
19310 The CU "per_cu" pointer is needed because offset alone is not enough to
19311 uniquely identify the type. A file may have multiple .debug_types sections,
19312 or the type may come from a DWO file. We have to use something in
19313 dwarf2_per_cu_data (or the pointer to it) because we can enter the lookup
19314 routine, get_die_type_at_offset, from outside this file, and thus won't
19315 necessarily have PER_CU->cu. Fortunately, PER_CU is stable for the life
19318 struct dwarf2_per_cu_offset_and_type
19320 const struct dwarf2_per_cu_data
*per_cu
;
19321 sect_offset offset
;
19325 /* Hash function for a dwarf2_per_cu_offset_and_type. */
19328 per_cu_offset_and_type_hash (const void *item
)
19330 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
19332 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
19335 /* Equality function for a dwarf2_per_cu_offset_and_type. */
19338 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
19340 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
19341 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
19343 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
19344 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
19347 /* Set the type associated with DIE to TYPE. Save it in CU's hash
19348 table if necessary. For convenience, return TYPE.
19350 The DIEs reading must have careful ordering to:
19351 * Not cause infite loops trying to read in DIEs as a prerequisite for
19352 reading current DIE.
19353 * Not trying to dereference contents of still incompletely read in types
19354 while reading in other DIEs.
19355 * Enable referencing still incompletely read in types just by a pointer to
19356 the type without accessing its fields.
19358 Therefore caller should follow these rules:
19359 * Try to fetch any prerequisite types we may need to build this DIE type
19360 before building the type and calling set_die_type.
19361 * After building type call set_die_type for current DIE as soon as
19362 possible before fetching more types to complete the current type.
19363 * Make the type as complete as possible before fetching more types. */
19365 static struct type
*
19366 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
19368 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
19369 struct objfile
*objfile
= cu
->objfile
;
19371 /* For Ada types, make sure that the gnat-specific data is always
19372 initialized (if not already set). There are a few types where
19373 we should not be doing so, because the type-specific area is
19374 already used to hold some other piece of info (eg: TYPE_CODE_FLT
19375 where the type-specific area is used to store the floatformat).
19376 But this is not a problem, because the gnat-specific information
19377 is actually not needed for these types. */
19378 if (need_gnat_info (cu
)
19379 && TYPE_CODE (type
) != TYPE_CODE_FUNC
19380 && TYPE_CODE (type
) != TYPE_CODE_FLT
19381 && !HAVE_GNAT_AUX_INFO (type
))
19382 INIT_GNAT_SPECIFIC (type
);
19384 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
19386 dwarf2_per_objfile
->die_type_hash
=
19387 htab_create_alloc_ex (127,
19388 per_cu_offset_and_type_hash
,
19389 per_cu_offset_and_type_eq
,
19391 &objfile
->objfile_obstack
,
19392 hashtab_obstack_allocate
,
19393 dummy_obstack_deallocate
);
19396 ofs
.per_cu
= cu
->per_cu
;
19397 ofs
.offset
= die
->offset
;
19399 slot
= (struct dwarf2_per_cu_offset_and_type
**)
19400 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
19402 complaint (&symfile_complaints
,
19403 _("A problem internal to GDB: DIE 0x%x has type already set"),
19404 die
->offset
.sect_off
);
19405 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
19410 /* Look up the type for the die at OFFSET in the appropriate type_hash
19411 table, or return NULL if the die does not have a saved type. */
19413 static struct type
*
19414 get_die_type_at_offset (sect_offset offset
,
19415 struct dwarf2_per_cu_data
*per_cu
)
19417 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
19419 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
19422 ofs
.per_cu
= per_cu
;
19423 ofs
.offset
= offset
;
19424 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
19431 /* Look up the type for DIE in the appropriate type_hash table,
19432 or return NULL if DIE does not have a saved type. */
19434 static struct type
*
19435 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19437 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
19440 /* Add a dependence relationship from CU to REF_PER_CU. */
19443 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
19444 struct dwarf2_per_cu_data
*ref_per_cu
)
19448 if (cu
->dependencies
== NULL
)
19450 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
19451 NULL
, &cu
->comp_unit_obstack
,
19452 hashtab_obstack_allocate
,
19453 dummy_obstack_deallocate
);
19455 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
19457 *slot
= ref_per_cu
;
19460 /* Subroutine of dwarf2_mark to pass to htab_traverse.
19461 Set the mark field in every compilation unit in the
19462 cache that we must keep because we are keeping CU. */
19465 dwarf2_mark_helper (void **slot
, void *data
)
19467 struct dwarf2_per_cu_data
*per_cu
;
19469 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
19471 /* cu->dependencies references may not yet have been ever read if QUIT aborts
19472 reading of the chain. As such dependencies remain valid it is not much
19473 useful to track and undo them during QUIT cleanups. */
19474 if (per_cu
->cu
== NULL
)
19477 if (per_cu
->cu
->mark
)
19479 per_cu
->cu
->mark
= 1;
19481 if (per_cu
->cu
->dependencies
!= NULL
)
19482 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
19487 /* Set the mark field in CU and in every other compilation unit in the
19488 cache that we must keep because we are keeping CU. */
19491 dwarf2_mark (struct dwarf2_cu
*cu
)
19496 if (cu
->dependencies
!= NULL
)
19497 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
19501 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
19505 per_cu
->cu
->mark
= 0;
19506 per_cu
= per_cu
->cu
->read_in_chain
;
19510 /* Trivial hash function for partial_die_info: the hash value of a DIE
19511 is its offset in .debug_info for this objfile. */
19514 partial_die_hash (const void *item
)
19516 const struct partial_die_info
*part_die
= item
;
19518 return part_die
->offset
.sect_off
;
19521 /* Trivial comparison function for partial_die_info structures: two DIEs
19522 are equal if they have the same offset. */
19525 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
19527 const struct partial_die_info
*part_die_lhs
= item_lhs
;
19528 const struct partial_die_info
*part_die_rhs
= item_rhs
;
19530 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
19533 static struct cmd_list_element
*set_dwarf2_cmdlist
;
19534 static struct cmd_list_element
*show_dwarf2_cmdlist
;
19537 set_dwarf2_cmd (char *args
, int from_tty
)
19539 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
19543 show_dwarf2_cmd (char *args
, int from_tty
)
19545 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
19548 /* Free data associated with OBJFILE, if necessary. */
19551 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
19553 struct dwarf2_per_objfile
*data
= d
;
19556 for (ix
= 0; ix
< dwarf2_per_objfile
->n_comp_units
; ++ix
)
19557 VEC_free (dwarf2_per_cu_ptr
,
19558 dwarf2_per_objfile
->all_comp_units
[ix
]->s
.imported_symtabs
);
19560 VEC_free (dwarf2_section_info_def
, data
->types
);
19562 if (data
->dwo_files
)
19563 free_dwo_files (data
->dwo_files
, objfile
);
19565 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
19566 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
19570 /* The "save gdb-index" command. */
19572 /* The contents of the hash table we create when building the string
19574 struct strtab_entry
19576 offset_type offset
;
19580 /* Hash function for a strtab_entry.
19582 Function is used only during write_hash_table so no index format backward
19583 compatibility is needed. */
19586 hash_strtab_entry (const void *e
)
19588 const struct strtab_entry
*entry
= e
;
19589 return mapped_index_string_hash (INT_MAX
, entry
->str
);
19592 /* Equality function for a strtab_entry. */
19595 eq_strtab_entry (const void *a
, const void *b
)
19597 const struct strtab_entry
*ea
= a
;
19598 const struct strtab_entry
*eb
= b
;
19599 return !strcmp (ea
->str
, eb
->str
);
19602 /* Create a strtab_entry hash table. */
19605 create_strtab (void)
19607 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
19608 xfree
, xcalloc
, xfree
);
19611 /* Add a string to the constant pool. Return the string's offset in
19615 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
19618 struct strtab_entry entry
;
19619 struct strtab_entry
*result
;
19622 slot
= htab_find_slot (table
, &entry
, INSERT
);
19627 result
= XNEW (struct strtab_entry
);
19628 result
->offset
= obstack_object_size (cpool
);
19630 obstack_grow_str0 (cpool
, str
);
19633 return result
->offset
;
19636 /* An entry in the symbol table. */
19637 struct symtab_index_entry
19639 /* The name of the symbol. */
19641 /* The offset of the name in the constant pool. */
19642 offset_type index_offset
;
19643 /* A sorted vector of the indices of all the CUs that hold an object
19645 VEC (offset_type
) *cu_indices
;
19648 /* The symbol table. This is a power-of-2-sized hash table. */
19649 struct mapped_symtab
19651 offset_type n_elements
;
19653 struct symtab_index_entry
**data
;
19656 /* Hash function for a symtab_index_entry. */
19659 hash_symtab_entry (const void *e
)
19661 const struct symtab_index_entry
*entry
= e
;
19662 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
19663 sizeof (offset_type
) * VEC_length (offset_type
,
19664 entry
->cu_indices
),
19668 /* Equality function for a symtab_index_entry. */
19671 eq_symtab_entry (const void *a
, const void *b
)
19673 const struct symtab_index_entry
*ea
= a
;
19674 const struct symtab_index_entry
*eb
= b
;
19675 int len
= VEC_length (offset_type
, ea
->cu_indices
);
19676 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
19678 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
19679 VEC_address (offset_type
, eb
->cu_indices
),
19680 sizeof (offset_type
) * len
);
19683 /* Destroy a symtab_index_entry. */
19686 delete_symtab_entry (void *p
)
19688 struct symtab_index_entry
*entry
= p
;
19689 VEC_free (offset_type
, entry
->cu_indices
);
19693 /* Create a hash table holding symtab_index_entry objects. */
19696 create_symbol_hash_table (void)
19698 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
19699 delete_symtab_entry
, xcalloc
, xfree
);
19702 /* Create a new mapped symtab object. */
19704 static struct mapped_symtab
*
19705 create_mapped_symtab (void)
19707 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
19708 symtab
->n_elements
= 0;
19709 symtab
->size
= 1024;
19710 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
19714 /* Destroy a mapped_symtab. */
19717 cleanup_mapped_symtab (void *p
)
19719 struct mapped_symtab
*symtab
= p
;
19720 /* The contents of the array are freed when the other hash table is
19722 xfree (symtab
->data
);
19726 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
19729 Function is used only during write_hash_table so no index format backward
19730 compatibility is needed. */
19732 static struct symtab_index_entry
**
19733 find_slot (struct mapped_symtab
*symtab
, const char *name
)
19735 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
19737 index
= hash
& (symtab
->size
- 1);
19738 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
19742 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
19743 return &symtab
->data
[index
];
19744 index
= (index
+ step
) & (symtab
->size
- 1);
19748 /* Expand SYMTAB's hash table. */
19751 hash_expand (struct mapped_symtab
*symtab
)
19753 offset_type old_size
= symtab
->size
;
19755 struct symtab_index_entry
**old_entries
= symtab
->data
;
19758 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
19760 for (i
= 0; i
< old_size
; ++i
)
19762 if (old_entries
[i
])
19764 struct symtab_index_entry
**slot
= find_slot (symtab
,
19765 old_entries
[i
]->name
);
19766 *slot
= old_entries
[i
];
19770 xfree (old_entries
);
19773 /* Add an entry to SYMTAB. NAME is the name of the symbol.
19774 CU_INDEX is the index of the CU in which the symbol appears.
19775 IS_STATIC is one if the symbol is static, otherwise zero (global). */
19778 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
19779 int is_static
, gdb_index_symbol_kind kind
,
19780 offset_type cu_index
)
19782 struct symtab_index_entry
**slot
;
19783 offset_type cu_index_and_attrs
;
19785 ++symtab
->n_elements
;
19786 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
19787 hash_expand (symtab
);
19789 slot
= find_slot (symtab
, name
);
19792 *slot
= XNEW (struct symtab_index_entry
);
19793 (*slot
)->name
= name
;
19794 /* index_offset is set later. */
19795 (*slot
)->cu_indices
= NULL
;
19798 cu_index_and_attrs
= 0;
19799 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
19800 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
19801 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
19803 /* We don't want to record an index value twice as we want to avoid the
19805 We process all global symbols and then all static symbols
19806 (which would allow us to avoid the duplication by only having to check
19807 the last entry pushed), but a symbol could have multiple kinds in one CU.
19808 To keep things simple we don't worry about the duplication here and
19809 sort and uniqufy the list after we've processed all symbols. */
19810 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
19813 /* qsort helper routine for uniquify_cu_indices. */
19816 offset_type_compare (const void *ap
, const void *bp
)
19818 offset_type a
= *(offset_type
*) ap
;
19819 offset_type b
= *(offset_type
*) bp
;
19821 return (a
> b
) - (b
> a
);
19824 /* Sort and remove duplicates of all symbols' cu_indices lists. */
19827 uniquify_cu_indices (struct mapped_symtab
*symtab
)
19831 for (i
= 0; i
< symtab
->size
; ++i
)
19833 struct symtab_index_entry
*entry
= symtab
->data
[i
];
19836 && entry
->cu_indices
!= NULL
)
19838 unsigned int next_to_insert
, next_to_check
;
19839 offset_type last_value
;
19841 qsort (VEC_address (offset_type
, entry
->cu_indices
),
19842 VEC_length (offset_type
, entry
->cu_indices
),
19843 sizeof (offset_type
), offset_type_compare
);
19845 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
19846 next_to_insert
= 1;
19847 for (next_to_check
= 1;
19848 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
19851 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
19854 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
19856 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
19861 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
19866 /* Add a vector of indices to the constant pool. */
19869 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
19870 struct symtab_index_entry
*entry
)
19874 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
19877 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
19878 offset_type val
= MAYBE_SWAP (len
);
19883 entry
->index_offset
= obstack_object_size (cpool
);
19885 obstack_grow (cpool
, &val
, sizeof (val
));
19887 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
19890 val
= MAYBE_SWAP (iter
);
19891 obstack_grow (cpool
, &val
, sizeof (val
));
19896 struct symtab_index_entry
*old_entry
= *slot
;
19897 entry
->index_offset
= old_entry
->index_offset
;
19900 return entry
->index_offset
;
19903 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
19904 constant pool entries going into the obstack CPOOL. */
19907 write_hash_table (struct mapped_symtab
*symtab
,
19908 struct obstack
*output
, struct obstack
*cpool
)
19911 htab_t symbol_hash_table
;
19914 symbol_hash_table
= create_symbol_hash_table ();
19915 str_table
= create_strtab ();
19917 /* We add all the index vectors to the constant pool first, to
19918 ensure alignment is ok. */
19919 for (i
= 0; i
< symtab
->size
; ++i
)
19921 if (symtab
->data
[i
])
19922 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
19925 /* Now write out the hash table. */
19926 for (i
= 0; i
< symtab
->size
; ++i
)
19928 offset_type str_off
, vec_off
;
19930 if (symtab
->data
[i
])
19932 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
19933 vec_off
= symtab
->data
[i
]->index_offset
;
19937 /* While 0 is a valid constant pool index, it is not valid
19938 to have 0 for both offsets. */
19943 str_off
= MAYBE_SWAP (str_off
);
19944 vec_off
= MAYBE_SWAP (vec_off
);
19946 obstack_grow (output
, &str_off
, sizeof (str_off
));
19947 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
19950 htab_delete (str_table
);
19951 htab_delete (symbol_hash_table
);
19954 /* Struct to map psymtab to CU index in the index file. */
19955 struct psymtab_cu_index_map
19957 struct partial_symtab
*psymtab
;
19958 unsigned int cu_index
;
19962 hash_psymtab_cu_index (const void *item
)
19964 const struct psymtab_cu_index_map
*map
= item
;
19966 return htab_hash_pointer (map
->psymtab
);
19970 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
19972 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
19973 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
19975 return lhs
->psymtab
== rhs
->psymtab
;
19978 /* Helper struct for building the address table. */
19979 struct addrmap_index_data
19981 struct objfile
*objfile
;
19982 struct obstack
*addr_obstack
;
19983 htab_t cu_index_htab
;
19985 /* Non-zero if the previous_* fields are valid.
19986 We can't write an entry until we see the next entry (since it is only then
19987 that we know the end of the entry). */
19988 int previous_valid
;
19989 /* Index of the CU in the table of all CUs in the index file. */
19990 unsigned int previous_cu_index
;
19991 /* Start address of the CU. */
19992 CORE_ADDR previous_cu_start
;
19995 /* Write an address entry to OBSTACK. */
19998 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
19999 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
20001 offset_type cu_index_to_write
;
20003 CORE_ADDR baseaddr
;
20005 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
20007 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
20008 obstack_grow (obstack
, addr
, 8);
20009 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
20010 obstack_grow (obstack
, addr
, 8);
20011 cu_index_to_write
= MAYBE_SWAP (cu_index
);
20012 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
20015 /* Worker function for traversing an addrmap to build the address table. */
20018 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
20020 struct addrmap_index_data
*data
= datap
;
20021 struct partial_symtab
*pst
= obj
;
20023 if (data
->previous_valid
)
20024 add_address_entry (data
->objfile
, data
->addr_obstack
,
20025 data
->previous_cu_start
, start_addr
,
20026 data
->previous_cu_index
);
20028 data
->previous_cu_start
= start_addr
;
20031 struct psymtab_cu_index_map find_map
, *map
;
20032 find_map
.psymtab
= pst
;
20033 map
= htab_find (data
->cu_index_htab
, &find_map
);
20034 gdb_assert (map
!= NULL
);
20035 data
->previous_cu_index
= map
->cu_index
;
20036 data
->previous_valid
= 1;
20039 data
->previous_valid
= 0;
20044 /* Write OBJFILE's address map to OBSTACK.
20045 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
20046 in the index file. */
20049 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
20050 htab_t cu_index_htab
)
20052 struct addrmap_index_data addrmap_index_data
;
20054 /* When writing the address table, we have to cope with the fact that
20055 the addrmap iterator only provides the start of a region; we have to
20056 wait until the next invocation to get the start of the next region. */
20058 addrmap_index_data
.objfile
= objfile
;
20059 addrmap_index_data
.addr_obstack
= obstack
;
20060 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
20061 addrmap_index_data
.previous_valid
= 0;
20063 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
20064 &addrmap_index_data
);
20066 /* It's highly unlikely the last entry (end address = 0xff...ff)
20067 is valid, but we should still handle it.
20068 The end address is recorded as the start of the next region, but that
20069 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
20071 if (addrmap_index_data
.previous_valid
)
20072 add_address_entry (objfile
, obstack
,
20073 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
20074 addrmap_index_data
.previous_cu_index
);
20077 /* Return the symbol kind of PSYM. */
20079 static gdb_index_symbol_kind
20080 symbol_kind (struct partial_symbol
*psym
)
20082 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
20083 enum address_class aclass
= PSYMBOL_CLASS (psym
);
20091 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
20093 return GDB_INDEX_SYMBOL_KIND_TYPE
;
20095 case LOC_CONST_BYTES
:
20096 case LOC_OPTIMIZED_OUT
:
20098 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
20100 /* Note: It's currently impossible to recognize psyms as enum values
20101 short of reading the type info. For now punt. */
20102 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
20104 /* There are other LOC_FOO values that one might want to classify
20105 as variables, but dwarf2read.c doesn't currently use them. */
20106 return GDB_INDEX_SYMBOL_KIND_OTHER
;
20108 case STRUCT_DOMAIN
:
20109 return GDB_INDEX_SYMBOL_KIND_TYPE
;
20111 return GDB_INDEX_SYMBOL_KIND_OTHER
;
20115 /* Add a list of partial symbols to SYMTAB. */
20118 write_psymbols (struct mapped_symtab
*symtab
,
20120 struct partial_symbol
**psymp
,
20122 offset_type cu_index
,
20125 for (; count
-- > 0; ++psymp
)
20127 struct partial_symbol
*psym
= *psymp
;
20130 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
20131 error (_("Ada is not currently supported by the index"));
20133 /* Only add a given psymbol once. */
20134 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
20137 gdb_index_symbol_kind kind
= symbol_kind (psym
);
20140 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
20141 is_static
, kind
, cu_index
);
20146 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
20147 exception if there is an error. */
20150 write_obstack (FILE *file
, struct obstack
*obstack
)
20152 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
20154 != obstack_object_size (obstack
))
20155 error (_("couldn't data write to file"));
20158 /* Unlink a file if the argument is not NULL. */
20161 unlink_if_set (void *p
)
20163 char **filename
= p
;
20165 unlink (*filename
);
20168 /* A helper struct used when iterating over debug_types. */
20169 struct signatured_type_index_data
20171 struct objfile
*objfile
;
20172 struct mapped_symtab
*symtab
;
20173 struct obstack
*types_list
;
20178 /* A helper function that writes a single signatured_type to an
20182 write_one_signatured_type (void **slot
, void *d
)
20184 struct signatured_type_index_data
*info
= d
;
20185 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
20186 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
20187 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
20190 write_psymbols (info
->symtab
,
20192 info
->objfile
->global_psymbols
.list
20193 + psymtab
->globals_offset
,
20194 psymtab
->n_global_syms
, info
->cu_index
,
20196 write_psymbols (info
->symtab
,
20198 info
->objfile
->static_psymbols
.list
20199 + psymtab
->statics_offset
,
20200 psymtab
->n_static_syms
, info
->cu_index
,
20203 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20204 entry
->per_cu
.offset
.sect_off
);
20205 obstack_grow (info
->types_list
, val
, 8);
20206 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20207 entry
->type_offset_in_tu
.cu_off
);
20208 obstack_grow (info
->types_list
, val
, 8);
20209 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
20210 obstack_grow (info
->types_list
, val
, 8);
20217 /* Recurse into all "included" dependencies and write their symbols as
20218 if they appeared in this psymtab. */
20221 recursively_write_psymbols (struct objfile
*objfile
,
20222 struct partial_symtab
*psymtab
,
20223 struct mapped_symtab
*symtab
,
20225 offset_type cu_index
)
20229 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
20230 if (psymtab
->dependencies
[i
]->user
!= NULL
)
20231 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
20232 symtab
, psyms_seen
, cu_index
);
20234 write_psymbols (symtab
,
20236 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
20237 psymtab
->n_global_syms
, cu_index
,
20239 write_psymbols (symtab
,
20241 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
20242 psymtab
->n_static_syms
, cu_index
,
20246 /* Create an index file for OBJFILE in the directory DIR. */
20249 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
20251 struct cleanup
*cleanup
;
20252 char *filename
, *cleanup_filename
;
20253 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
20254 struct obstack cu_list
, types_cu_list
;
20257 struct mapped_symtab
*symtab
;
20258 offset_type val
, size_of_contents
, total_len
;
20261 htab_t cu_index_htab
;
20262 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
20264 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
20267 if (dwarf2_per_objfile
->using_index
)
20268 error (_("Cannot use an index to create the index"));
20270 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
20271 error (_("Cannot make an index when the file has multiple .debug_types sections"));
20273 if (stat (objfile
->name
, &st
) < 0)
20274 perror_with_name (objfile
->name
);
20276 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
20277 INDEX_SUFFIX
, (char *) NULL
);
20278 cleanup
= make_cleanup (xfree
, filename
);
20280 out_file
= fopen (filename
, "wb");
20282 error (_("Can't open `%s' for writing"), filename
);
20284 cleanup_filename
= filename
;
20285 make_cleanup (unlink_if_set
, &cleanup_filename
);
20287 symtab
= create_mapped_symtab ();
20288 make_cleanup (cleanup_mapped_symtab
, symtab
);
20290 obstack_init (&addr_obstack
);
20291 make_cleanup_obstack_free (&addr_obstack
);
20293 obstack_init (&cu_list
);
20294 make_cleanup_obstack_free (&cu_list
);
20296 obstack_init (&types_cu_list
);
20297 make_cleanup_obstack_free (&types_cu_list
);
20299 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
20300 NULL
, xcalloc
, xfree
);
20301 make_cleanup_htab_delete (psyms_seen
);
20303 /* While we're scanning CU's create a table that maps a psymtab pointer
20304 (which is what addrmap records) to its index (which is what is recorded
20305 in the index file). This will later be needed to write the address
20307 cu_index_htab
= htab_create_alloc (100,
20308 hash_psymtab_cu_index
,
20309 eq_psymtab_cu_index
,
20310 NULL
, xcalloc
, xfree
);
20311 make_cleanup_htab_delete (cu_index_htab
);
20312 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
20313 xmalloc (sizeof (struct psymtab_cu_index_map
)
20314 * dwarf2_per_objfile
->n_comp_units
);
20315 make_cleanup (xfree
, psymtab_cu_index_map
);
20317 /* The CU list is already sorted, so we don't need to do additional
20318 work here. Also, the debug_types entries do not appear in
20319 all_comp_units, but only in their own hash table. */
20320 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
20322 struct dwarf2_per_cu_data
*per_cu
20323 = dwarf2_per_objfile
->all_comp_units
[i
];
20324 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
20326 struct psymtab_cu_index_map
*map
;
20329 if (psymtab
->user
== NULL
)
20330 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
20332 map
= &psymtab_cu_index_map
[i
];
20333 map
->psymtab
= psymtab
;
20335 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
20336 gdb_assert (slot
!= NULL
);
20337 gdb_assert (*slot
== NULL
);
20340 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20341 per_cu
->offset
.sect_off
);
20342 obstack_grow (&cu_list
, val
, 8);
20343 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
20344 obstack_grow (&cu_list
, val
, 8);
20347 /* Dump the address map. */
20348 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
20350 /* Write out the .debug_type entries, if any. */
20351 if (dwarf2_per_objfile
->signatured_types
)
20353 struct signatured_type_index_data sig_data
;
20355 sig_data
.objfile
= objfile
;
20356 sig_data
.symtab
= symtab
;
20357 sig_data
.types_list
= &types_cu_list
;
20358 sig_data
.psyms_seen
= psyms_seen
;
20359 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
20360 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
20361 write_one_signatured_type
, &sig_data
);
20364 /* Now that we've processed all symbols we can shrink their cu_indices
20366 uniquify_cu_indices (symtab
);
20368 obstack_init (&constant_pool
);
20369 make_cleanup_obstack_free (&constant_pool
);
20370 obstack_init (&symtab_obstack
);
20371 make_cleanup_obstack_free (&symtab_obstack
);
20372 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
20374 obstack_init (&contents
);
20375 make_cleanup_obstack_free (&contents
);
20376 size_of_contents
= 6 * sizeof (offset_type
);
20377 total_len
= size_of_contents
;
20379 /* The version number. */
20380 val
= MAYBE_SWAP (7);
20381 obstack_grow (&contents
, &val
, sizeof (val
));
20383 /* The offset of the CU list from the start of the file. */
20384 val
= MAYBE_SWAP (total_len
);
20385 obstack_grow (&contents
, &val
, sizeof (val
));
20386 total_len
+= obstack_object_size (&cu_list
);
20388 /* The offset of the types CU list from the start of the file. */
20389 val
= MAYBE_SWAP (total_len
);
20390 obstack_grow (&contents
, &val
, sizeof (val
));
20391 total_len
+= obstack_object_size (&types_cu_list
);
20393 /* The offset of the address table from the start of the file. */
20394 val
= MAYBE_SWAP (total_len
);
20395 obstack_grow (&contents
, &val
, sizeof (val
));
20396 total_len
+= obstack_object_size (&addr_obstack
);
20398 /* The offset of the symbol table from the start of the file. */
20399 val
= MAYBE_SWAP (total_len
);
20400 obstack_grow (&contents
, &val
, sizeof (val
));
20401 total_len
+= obstack_object_size (&symtab_obstack
);
20403 /* The offset of the constant pool from the start of the file. */
20404 val
= MAYBE_SWAP (total_len
);
20405 obstack_grow (&contents
, &val
, sizeof (val
));
20406 total_len
+= obstack_object_size (&constant_pool
);
20408 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
20410 write_obstack (out_file
, &contents
);
20411 write_obstack (out_file
, &cu_list
);
20412 write_obstack (out_file
, &types_cu_list
);
20413 write_obstack (out_file
, &addr_obstack
);
20414 write_obstack (out_file
, &symtab_obstack
);
20415 write_obstack (out_file
, &constant_pool
);
20419 /* We want to keep the file, so we set cleanup_filename to NULL
20420 here. See unlink_if_set. */
20421 cleanup_filename
= NULL
;
20423 do_cleanups (cleanup
);
20426 /* Implementation of the `save gdb-index' command.
20428 Note that the file format used by this command is documented in the
20429 GDB manual. Any changes here must be documented there. */
20432 save_gdb_index_command (char *arg
, int from_tty
)
20434 struct objfile
*objfile
;
20437 error (_("usage: save gdb-index DIRECTORY"));
20439 ALL_OBJFILES (objfile
)
20443 /* If the objfile does not correspond to an actual file, skip it. */
20444 if (stat (objfile
->name
, &st
) < 0)
20447 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
20448 if (dwarf2_per_objfile
)
20450 volatile struct gdb_exception except
;
20452 TRY_CATCH (except
, RETURN_MASK_ERROR
)
20454 write_psymtabs_to_index (objfile
, arg
);
20456 if (except
.reason
< 0)
20457 exception_fprintf (gdb_stderr
, except
,
20458 _("Error while writing index for `%s': "),
20466 int dwarf2_always_disassemble
;
20469 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
20470 struct cmd_list_element
*c
, const char *value
)
20472 fprintf_filtered (file
,
20473 _("Whether to always disassemble "
20474 "DWARF expressions is %s.\n"),
20479 show_check_physname (struct ui_file
*file
, int from_tty
,
20480 struct cmd_list_element
*c
, const char *value
)
20482 fprintf_filtered (file
,
20483 _("Whether to check \"physname\" is %s.\n"),
20487 void _initialize_dwarf2_read (void);
20490 _initialize_dwarf2_read (void)
20492 struct cmd_list_element
*c
;
20494 dwarf2_objfile_data_key
20495 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
20497 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
20498 Set DWARF 2 specific variables.\n\
20499 Configure DWARF 2 variables such as the cache size"),
20500 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
20501 0/*allow-unknown*/, &maintenance_set_cmdlist
);
20503 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
20504 Show DWARF 2 specific variables\n\
20505 Show DWARF 2 variables such as the cache size"),
20506 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
20507 0/*allow-unknown*/, &maintenance_show_cmdlist
);
20509 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
20510 &dwarf2_max_cache_age
, _("\
20511 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
20512 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
20513 A higher limit means that cached compilation units will be stored\n\
20514 in memory longer, and more total memory will be used. Zero disables\n\
20515 caching, which can slow down startup."),
20517 show_dwarf2_max_cache_age
,
20518 &set_dwarf2_cmdlist
,
20519 &show_dwarf2_cmdlist
);
20521 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
20522 &dwarf2_always_disassemble
, _("\
20523 Set whether `info address' always disassembles DWARF expressions."), _("\
20524 Show whether `info address' always disassembles DWARF expressions."), _("\
20525 When enabled, DWARF expressions are always printed in an assembly-like\n\
20526 syntax. When disabled, expressions will be printed in a more\n\
20527 conversational style, when possible."),
20529 show_dwarf2_always_disassemble
,
20530 &set_dwarf2_cmdlist
,
20531 &show_dwarf2_cmdlist
);
20533 add_setshow_boolean_cmd ("dwarf2-read", no_class
, &dwarf2_read_debug
, _("\
20534 Set debugging of the dwarf2 reader."), _("\
20535 Show debugging of the dwarf2 reader."), _("\
20536 When enabled, debugging messages are printed during dwarf2 reading\n\
20537 and symtab expansion."),
20540 &setdebuglist
, &showdebuglist
);
20542 add_setshow_zuinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
20543 Set debugging of the dwarf2 DIE reader."), _("\
20544 Show debugging of the dwarf2 DIE reader."), _("\
20545 When enabled (non-zero), DIEs are dumped after they are read in.\n\
20546 The value is the maximum depth to print."),
20549 &setdebuglist
, &showdebuglist
);
20551 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
20552 Set cross-checking of \"physname\" code against demangler."), _("\
20553 Show cross-checking of \"physname\" code against demangler."), _("\
20554 When enabled, GDB's internal \"physname\" code is checked against\n\
20556 NULL
, show_check_physname
,
20557 &setdebuglist
, &showdebuglist
);
20559 add_setshow_boolean_cmd ("use-deprecated-index-sections",
20560 no_class
, &use_deprecated_index_sections
, _("\
20561 Set whether to use deprecated gdb_index sections."), _("\
20562 Show whether to use deprecated gdb_index sections."), _("\
20563 When enabled, deprecated .gdb_index sections are used anyway.\n\
20564 Normally they are ignored either because of a missing feature or\n\
20565 performance issue.\n\
20566 Warning: This option must be enabled before gdb reads the file."),
20569 &setlist
, &showlist
);
20571 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
20573 Save a gdb-index file.\n\
20574 Usage: save gdb-index DIRECTORY"),
20576 set_cmd_completer (c
, filename_completer
);