1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2013 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_read_symtab (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 const char *, const 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 const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1533 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1535 static const char *dwarf2_full_name (const 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 const char **name
, const 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 (const 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 /* die_reader_func for dw2_get_file_names. */
2820 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
2822 struct die_info
*comp_unit_die
,
2826 struct dwarf2_cu
*cu
= reader
->cu
;
2827 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
2828 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2829 struct dwarf2_per_cu_data
*lh_cu
;
2830 struct line_header
*lh
;
2831 struct attribute
*attr
;
2833 const char *name
, *comp_dir
;
2835 struct quick_file_names
*qfn
;
2836 unsigned int line_offset
;
2838 /* Our callers never want to match partial units -- instead they
2839 will match the enclosing full CU. */
2840 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
2842 this_cu
->v
.quick
->no_file_data
= 1;
2846 /* If we're reading the line header for TUs, store it in the "per_cu"
2848 if (this_cu
->is_debug_types
)
2850 struct type_unit_group
*tu_group
= data
;
2852 gdb_assert (tu_group
!= NULL
);
2853 lh_cu
= &tu_group
->per_cu
;
2862 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
2865 struct quick_file_names find_entry
;
2867 line_offset
= DW_UNSND (attr
);
2869 /* We may have already read in this line header (TU line header sharing).
2870 If we have we're done. */
2871 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
2872 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
2873 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
2874 &find_entry
, INSERT
);
2877 lh_cu
->v
.quick
->file_names
= *slot
;
2881 lh
= dwarf_decode_line_header (line_offset
, cu
);
2885 lh_cu
->v
.quick
->no_file_data
= 1;
2889 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
2890 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
2891 qfn
->hash
.line_offset
.sect_off
= line_offset
;
2892 gdb_assert (slot
!= NULL
);
2895 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
2897 qfn
->num_file_names
= lh
->num_file_names
;
2898 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
2899 lh
->num_file_names
* sizeof (char *));
2900 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2901 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2902 qfn
->real_names
= NULL
;
2904 free_line_header (lh
);
2906 lh_cu
->v
.quick
->file_names
= qfn
;
2909 /* A helper for the "quick" functions which attempts to read the line
2910 table for THIS_CU. */
2912 static struct quick_file_names
*
2913 dw2_get_file_names (struct objfile
*objfile
,
2914 struct dwarf2_per_cu_data
*this_cu
)
2916 /* For TUs this should only be called on the parent group. */
2917 if (this_cu
->is_debug_types
)
2918 gdb_assert (IS_TYPE_UNIT_GROUP (this_cu
));
2920 if (this_cu
->v
.quick
->file_names
!= NULL
)
2921 return this_cu
->v
.quick
->file_names
;
2922 /* If we know there is no line data, no point in looking again. */
2923 if (this_cu
->v
.quick
->no_file_data
)
2926 /* If DWO files are in use, we can still find the DW_AT_stmt_list attribute
2927 in the stub for CUs, there's is no need to lookup the DWO file.
2928 However, that's not the case for TUs where DW_AT_stmt_list lives in the
2930 if (this_cu
->is_debug_types
)
2932 struct type_unit_group
*tu_group
= this_cu
->s
.type_unit_group
;
2934 init_cutu_and_read_dies (tu_group
->t
.first_tu
, NULL
, 0, 0,
2935 dw2_get_file_names_reader
, tu_group
);
2938 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
2940 if (this_cu
->v
.quick
->no_file_data
)
2942 return this_cu
->v
.quick
->file_names
;
2945 /* A helper for the "quick" functions which computes and caches the
2946 real path for a given file name from the line table. */
2949 dw2_get_real_path (struct objfile
*objfile
,
2950 struct quick_file_names
*qfn
, int index
)
2952 if (qfn
->real_names
== NULL
)
2953 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2954 qfn
->num_file_names
, sizeof (char *));
2956 if (qfn
->real_names
[index
] == NULL
)
2957 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
2959 return qfn
->real_names
[index
];
2962 static struct symtab
*
2963 dw2_find_last_source_symtab (struct objfile
*objfile
)
2967 dw2_setup (objfile
);
2968 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2969 return dw2_instantiate_symtab (dw2_get_cu (index
));
2972 /* Traversal function for dw2_forget_cached_source_info. */
2975 dw2_free_cached_file_names (void **slot
, void *info
)
2977 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
2979 if (file_data
->real_names
)
2983 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2985 xfree ((void*) file_data
->real_names
[i
]);
2986 file_data
->real_names
[i
] = NULL
;
2994 dw2_forget_cached_source_info (struct objfile
*objfile
)
2996 dw2_setup (objfile
);
2998 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
2999 dw2_free_cached_file_names
, NULL
);
3002 /* Helper function for dw2_map_symtabs_matching_filename that expands
3003 the symtabs and calls the iterator. */
3006 dw2_map_expand_apply (struct objfile
*objfile
,
3007 struct dwarf2_per_cu_data
*per_cu
,
3009 const char *full_path
, const char *real_path
,
3010 int (*callback
) (struct symtab
*, void *),
3013 struct symtab
*last_made
= objfile
->symtabs
;
3015 /* Don't visit already-expanded CUs. */
3016 if (per_cu
->v
.quick
->symtab
)
3019 /* This may expand more than one symtab, and we want to iterate over
3021 dw2_instantiate_symtab (per_cu
);
3023 return iterate_over_some_symtabs (name
, full_path
, real_path
, callback
, data
,
3024 objfile
->symtabs
, last_made
);
3027 /* Implementation of the map_symtabs_matching_filename method. */
3030 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3031 const char *full_path
, const char *real_path
,
3032 int (*callback
) (struct symtab
*, void *),
3036 const char *name_basename
= lbasename (name
);
3037 int is_abs
= IS_ABSOLUTE_PATH (name
);
3039 dw2_setup (objfile
);
3041 /* The rule is CUs specify all the files, including those used by
3042 any TU, so there's no need to scan TUs here. */
3044 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3047 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3048 struct quick_file_names
*file_data
;
3050 /* We only need to look at symtabs not already expanded. */
3051 if (per_cu
->v
.quick
->symtab
)
3054 file_data
= dw2_get_file_names (objfile
, per_cu
);
3055 if (file_data
== NULL
)
3058 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3060 const char *this_name
= file_data
->file_names
[j
];
3062 if (FILENAME_CMP (name
, this_name
) == 0
3063 || (!is_abs
&& compare_filenames_for_search (this_name
, name
)))
3065 if (dw2_map_expand_apply (objfile
, per_cu
,
3066 name
, full_path
, real_path
,
3071 /* Before we invoke realpath, which can get expensive when many
3072 files are involved, do a quick comparison of the basenames. */
3073 if (! basenames_may_differ
3074 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3077 if (full_path
!= NULL
)
3079 const char *this_real_name
= dw2_get_real_path (objfile
,
3082 if (this_real_name
!= NULL
3083 && (FILENAME_CMP (full_path
, this_real_name
) == 0
3085 && compare_filenames_for_search (this_real_name
,
3088 if (dw2_map_expand_apply (objfile
, per_cu
,
3089 name
, full_path
, real_path
,
3095 if (real_path
!= NULL
)
3097 const char *this_real_name
= dw2_get_real_path (objfile
,
3100 if (this_real_name
!= NULL
3101 && (FILENAME_CMP (real_path
, this_real_name
) == 0
3103 && compare_filenames_for_search (this_real_name
,
3106 if (dw2_map_expand_apply (objfile
, per_cu
,
3107 name
, full_path
, real_path
,
3118 /* Struct used to manage iterating over all CUs looking for a symbol. */
3120 struct dw2_symtab_iterator
3122 /* The internalized form of .gdb_index. */
3123 struct mapped_index
*index
;
3124 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3125 int want_specific_block
;
3126 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3127 Unused if !WANT_SPECIFIC_BLOCK. */
3129 /* The kind of symbol we're looking for. */
3131 /* The list of CUs from the index entry of the symbol,
3132 or NULL if not found. */
3134 /* The next element in VEC to look at. */
3136 /* The number of elements in VEC, or zero if there is no match. */
3140 /* Initialize the index symtab iterator ITER.
3141 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3142 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3145 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3146 struct mapped_index
*index
,
3147 int want_specific_block
,
3152 iter
->index
= index
;
3153 iter
->want_specific_block
= want_specific_block
;
3154 iter
->block_index
= block_index
;
3155 iter
->domain
= domain
;
3158 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3159 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3167 /* Return the next matching CU or NULL if there are no more. */
3169 static struct dwarf2_per_cu_data
*
3170 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3172 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3174 offset_type cu_index_and_attrs
=
3175 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3176 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3177 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
3178 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3179 /* This value is only valid for index versions >= 7. */
3180 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3181 gdb_index_symbol_kind symbol_kind
=
3182 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3183 /* Only check the symbol attributes if they're present.
3184 Indices prior to version 7 don't record them,
3185 and indices >= 7 may elide them for certain symbols
3186 (gold does this). */
3188 (iter
->index
->version
>= 7
3189 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3191 /* Skip if already read in. */
3192 if (per_cu
->v
.quick
->symtab
)
3196 && iter
->want_specific_block
3197 && want_static
!= is_static
)
3200 /* Only check the symbol's kind if it has one. */
3203 switch (iter
->domain
)
3206 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3207 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3208 /* Some types are also in VAR_DOMAIN. */
3209 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3213 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3217 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3232 static struct symtab
*
3233 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3234 const char *name
, domain_enum domain
)
3236 struct symtab
*stab_best
= NULL
;
3237 struct mapped_index
*index
;
3239 dw2_setup (objfile
);
3241 index
= dwarf2_per_objfile
->index_table
;
3243 /* index is NULL if OBJF_READNOW. */
3246 struct dw2_symtab_iterator iter
;
3247 struct dwarf2_per_cu_data
*per_cu
;
3249 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3251 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3253 struct symbol
*sym
= NULL
;
3254 struct symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3256 /* Some caution must be observed with overloaded functions
3257 and methods, since the index will not contain any overload
3258 information (but NAME might contain it). */
3261 struct blockvector
*bv
= BLOCKVECTOR (stab
);
3262 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3264 sym
= lookup_block_symbol (block
, name
, domain
);
3267 if (sym
&& strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
3269 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
3275 /* Keep looking through other CUs. */
3283 dw2_print_stats (struct objfile
*objfile
)
3287 dw2_setup (objfile
);
3289 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3290 + dwarf2_per_objfile
->n_type_units
); ++i
)
3292 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3294 if (!per_cu
->v
.quick
->symtab
)
3297 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3301 dw2_dump (struct objfile
*objfile
)
3303 /* Nothing worth printing. */
3307 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
3308 struct section_offsets
*delta
)
3310 /* There's nothing to relocate here. */
3314 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3315 const char *func_name
)
3317 struct mapped_index
*index
;
3319 dw2_setup (objfile
);
3321 index
= dwarf2_per_objfile
->index_table
;
3323 /* index is NULL if OBJF_READNOW. */
3326 struct dw2_symtab_iterator iter
;
3327 struct dwarf2_per_cu_data
*per_cu
;
3329 /* Note: It doesn't matter what we pass for block_index here. */
3330 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3333 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3334 dw2_instantiate_symtab (per_cu
);
3339 dw2_expand_all_symtabs (struct objfile
*objfile
)
3343 dw2_setup (objfile
);
3345 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3346 + dwarf2_per_objfile
->n_type_units
); ++i
)
3348 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3350 dw2_instantiate_symtab (per_cu
);
3355 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
3356 const char *filename
)
3360 dw2_setup (objfile
);
3362 /* We don't need to consider type units here.
3363 This is only called for examining code, e.g. expand_line_sal.
3364 There can be an order of magnitude (or more) more type units
3365 than comp units, and we avoid them if we can. */
3367 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3370 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3371 struct quick_file_names
*file_data
;
3373 /* We only need to look at symtabs not already expanded. */
3374 if (per_cu
->v
.quick
->symtab
)
3377 file_data
= dw2_get_file_names (objfile
, per_cu
);
3378 if (file_data
== NULL
)
3381 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3383 const char *this_name
= file_data
->file_names
[j
];
3384 if (FILENAME_CMP (this_name
, filename
) == 0)
3386 dw2_instantiate_symtab (per_cu
);
3393 /* A helper function for dw2_find_symbol_file that finds the primary
3394 file name for a given CU. This is a die_reader_func. */
3397 dw2_get_primary_filename_reader (const struct die_reader_specs
*reader
,
3399 struct die_info
*comp_unit_die
,
3403 const char **result_ptr
= data
;
3404 struct dwarf2_cu
*cu
= reader
->cu
;
3405 struct attribute
*attr
;
3407 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
3411 *result_ptr
= DW_STRING (attr
);
3415 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
3417 struct dwarf2_per_cu_data
*per_cu
;
3419 const char *filename
;
3421 dw2_setup (objfile
);
3423 /* index_table is NULL if OBJF_READNOW. */
3424 if (!dwarf2_per_objfile
->index_table
)
3428 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
3430 struct blockvector
*bv
= BLOCKVECTOR (s
);
3431 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
3432 struct symbol
*sym
= lookup_block_symbol (block
, name
, VAR_DOMAIN
);
3435 return SYMBOL_SYMTAB (sym
)->filename
;
3440 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
3444 /* Note that this just looks at the very first one named NAME -- but
3445 actually we are looking for a function. find_main_filename
3446 should be rewritten so that it doesn't require a custom hook. It
3447 could just use the ordinary symbol tables. */
3448 /* vec[0] is the length, which must always be >0. */
3449 per_cu
= dw2_get_cu (GDB_INDEX_CU_VALUE (MAYBE_SWAP (vec
[1])));
3451 if (per_cu
->v
.quick
->symtab
!= NULL
)
3452 return per_cu
->v
.quick
->symtab
->filename
;
3454 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
3455 dw2_get_primary_filename_reader
, &filename
);
3461 dw2_map_matching_symbols (const char * name
, domain_enum
namespace,
3462 struct objfile
*objfile
, int global
,
3463 int (*callback
) (struct block
*,
3464 struct symbol
*, void *),
3465 void *data
, symbol_compare_ftype
*match
,
3466 symbol_compare_ftype
*ordered_compare
)
3468 /* Currently unimplemented; used for Ada. The function can be called if the
3469 current language is Ada for a non-Ada objfile using GNU index. As Ada
3470 does not look for non-Ada symbols this function should just return. */
3474 dw2_expand_symtabs_matching
3475 (struct objfile
*objfile
,
3476 int (*file_matcher
) (const char *, void *),
3477 int (*name_matcher
) (const char *, void *),
3478 enum search_domain kind
,
3483 struct mapped_index
*index
;
3485 dw2_setup (objfile
);
3487 /* index_table is NULL if OBJF_READNOW. */
3488 if (!dwarf2_per_objfile
->index_table
)
3490 index
= dwarf2_per_objfile
->index_table
;
3492 if (file_matcher
!= NULL
)
3494 struct cleanup
*cleanup
;
3495 htab_t visited_found
, visited_not_found
;
3497 visited_found
= htab_create_alloc (10,
3498 htab_hash_pointer
, htab_eq_pointer
,
3499 NULL
, xcalloc
, xfree
);
3500 cleanup
= make_cleanup_htab_delete (visited_found
);
3501 visited_not_found
= htab_create_alloc (10,
3502 htab_hash_pointer
, htab_eq_pointer
,
3503 NULL
, xcalloc
, xfree
);
3504 make_cleanup_htab_delete (visited_not_found
);
3506 /* The rule is CUs specify all the files, including those used by
3507 any TU, so there's no need to scan TUs here. */
3509 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3512 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3513 struct quick_file_names
*file_data
;
3516 per_cu
->v
.quick
->mark
= 0;
3518 /* We only need to look at symtabs not already expanded. */
3519 if (per_cu
->v
.quick
->symtab
)
3522 file_data
= dw2_get_file_names (objfile
, per_cu
);
3523 if (file_data
== NULL
)
3526 if (htab_find (visited_not_found
, file_data
) != NULL
)
3528 else if (htab_find (visited_found
, file_data
) != NULL
)
3530 per_cu
->v
.quick
->mark
= 1;
3534 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3536 if (file_matcher (file_data
->file_names
[j
], data
))
3538 per_cu
->v
.quick
->mark
= 1;
3543 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3545 : visited_not_found
,
3550 do_cleanups (cleanup
);
3553 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3555 offset_type idx
= 2 * iter
;
3557 offset_type
*vec
, vec_len
, vec_idx
;
3559 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3562 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3564 if (! (*name_matcher
) (name
, data
))
3567 /* The name was matched, now expand corresponding CUs that were
3569 vec
= (offset_type
*) (index
->constant_pool
3570 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3571 vec_len
= MAYBE_SWAP (vec
[0]);
3572 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3574 struct dwarf2_per_cu_data
*per_cu
;
3575 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3576 gdb_index_symbol_kind symbol_kind
=
3577 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3578 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3580 /* Don't crash on bad data. */
3581 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3582 + dwarf2_per_objfile
->n_type_units
))
3585 /* Only check the symbol's kind if it has one.
3586 Indices prior to version 7 don't record it. */
3587 if (index
->version
>= 7)
3591 case VARIABLES_DOMAIN
:
3592 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
3595 case FUNCTIONS_DOMAIN
:
3596 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
3600 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3608 per_cu
= dw2_get_cu (cu_index
);
3609 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
3610 dw2_instantiate_symtab (per_cu
);
3615 /* A helper for dw2_find_pc_sect_symtab which finds the most specific
3618 static struct symtab
*
3619 recursively_find_pc_sect_symtab (struct symtab
*symtab
, CORE_ADDR pc
)
3623 if (BLOCKVECTOR (symtab
) != NULL
3624 && blockvector_contains_pc (BLOCKVECTOR (symtab
), pc
))
3627 if (symtab
->includes
== NULL
)
3630 for (i
= 0; symtab
->includes
[i
]; ++i
)
3632 struct symtab
*s
= symtab
->includes
[i
];
3634 s
= recursively_find_pc_sect_symtab (s
, pc
);
3642 static struct symtab
*
3643 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
3644 struct minimal_symbol
*msymbol
,
3646 struct obj_section
*section
,
3649 struct dwarf2_per_cu_data
*data
;
3650 struct symtab
*result
;
3652 dw2_setup (objfile
);
3654 if (!objfile
->psymtabs_addrmap
)
3657 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
3661 if (warn_if_readin
&& data
->v
.quick
->symtab
)
3662 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
3663 paddress (get_objfile_arch (objfile
), pc
));
3665 result
= recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data
), pc
);
3666 gdb_assert (result
!= NULL
);
3671 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
3672 void *data
, int need_fullname
)
3675 struct cleanup
*cleanup
;
3676 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
3677 NULL
, xcalloc
, xfree
);
3679 cleanup
= make_cleanup_htab_delete (visited
);
3680 dw2_setup (objfile
);
3682 /* The rule is CUs specify all the files, including those used by
3683 any TU, so there's no need to scan TUs here.
3684 We can ignore file names coming from already-expanded CUs. */
3686 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3688 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3690 if (per_cu
->v
.quick
->symtab
)
3692 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
3695 *slot
= per_cu
->v
.quick
->file_names
;
3699 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3702 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3703 struct quick_file_names
*file_data
;
3706 /* We only need to look at symtabs not already expanded. */
3707 if (per_cu
->v
.quick
->symtab
)
3710 file_data
= dw2_get_file_names (objfile
, per_cu
);
3711 if (file_data
== NULL
)
3714 slot
= htab_find_slot (visited
, file_data
, INSERT
);
3717 /* Already visited. */
3722 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3724 const char *this_real_name
;
3727 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3729 this_real_name
= NULL
;
3730 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
3734 do_cleanups (cleanup
);
3738 dw2_has_symbols (struct objfile
*objfile
)
3743 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
3746 dw2_find_last_source_symtab
,
3747 dw2_forget_cached_source_info
,
3748 dw2_map_symtabs_matching_filename
,
3753 dw2_expand_symtabs_for_function
,
3754 dw2_expand_all_symtabs
,
3755 dw2_expand_symtabs_with_filename
,
3756 dw2_find_symbol_file
,
3757 dw2_map_matching_symbols
,
3758 dw2_expand_symtabs_matching
,
3759 dw2_find_pc_sect_symtab
,
3760 dw2_map_symbol_filenames
3763 /* Initialize for reading DWARF for this objfile. Return 0 if this
3764 file will use psymtabs, or 1 if using the GNU index. */
3767 dwarf2_initialize_objfile (struct objfile
*objfile
)
3769 /* If we're about to read full symbols, don't bother with the
3770 indices. In this case we also don't care if some other debug
3771 format is making psymtabs, because they are all about to be
3773 if ((objfile
->flags
& OBJF_READNOW
))
3777 dwarf2_per_objfile
->using_index
= 1;
3778 create_all_comp_units (objfile
);
3779 create_all_type_units (objfile
);
3780 dwarf2_per_objfile
->quick_file_names_table
=
3781 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3783 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3784 + dwarf2_per_objfile
->n_type_units
); ++i
)
3786 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3788 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3789 struct dwarf2_per_cu_quick_data
);
3792 /* Return 1 so that gdb sees the "quick" functions. However,
3793 these functions will be no-ops because we will have expanded
3798 if (dwarf2_read_index (objfile
))
3806 /* Build a partial symbol table. */
3809 dwarf2_build_psymtabs (struct objfile
*objfile
)
3811 volatile struct gdb_exception except
;
3813 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
3815 init_psymbol_list (objfile
, 1024);
3818 TRY_CATCH (except
, RETURN_MASK_ERROR
)
3820 /* This isn't really ideal: all the data we allocate on the
3821 objfile's obstack is still uselessly kept around. However,
3822 freeing it seems unsafe. */
3823 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
3825 dwarf2_build_psymtabs_hard (objfile
);
3826 discard_cleanups (cleanups
);
3828 if (except
.reason
< 0)
3829 exception_print (gdb_stderr
, except
);
3832 /* Return the total length of the CU described by HEADER. */
3835 get_cu_length (const struct comp_unit_head
*header
)
3837 return header
->initial_length_size
+ header
->length
;
3840 /* Return TRUE if OFFSET is within CU_HEADER. */
3843 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
3845 sect_offset bottom
= { cu_header
->offset
.sect_off
};
3846 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
3848 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
3851 /* Find the base address of the compilation unit for range lists and
3852 location lists. It will normally be specified by DW_AT_low_pc.
3853 In DWARF-3 draft 4, the base address could be overridden by
3854 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3855 compilation units with discontinuous ranges. */
3858 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
3860 struct attribute
*attr
;
3863 cu
->base_address
= 0;
3865 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3868 cu
->base_address
= DW_ADDR (attr
);
3873 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3876 cu
->base_address
= DW_ADDR (attr
);
3882 /* Read in the comp unit header information from the debug_info at info_ptr.
3883 NOTE: This leaves members offset, first_die_offset to be filled in
3887 read_comp_unit_head (struct comp_unit_head
*cu_header
,
3888 gdb_byte
*info_ptr
, bfd
*abfd
)
3891 unsigned int bytes_read
;
3893 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
3894 cu_header
->initial_length_size
= bytes_read
;
3895 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
3896 info_ptr
+= bytes_read
;
3897 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
3899 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
3901 info_ptr
+= bytes_read
;
3902 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
3904 signed_addr
= bfd_get_sign_extend_vma (abfd
);
3905 if (signed_addr
< 0)
3906 internal_error (__FILE__
, __LINE__
,
3907 _("read_comp_unit_head: dwarf from non elf file"));
3908 cu_header
->signed_addr_p
= signed_addr
;
3913 /* Helper function that returns the proper abbrev section for
3916 static struct dwarf2_section_info
*
3917 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
3919 struct dwarf2_section_info
*abbrev
;
3921 if (this_cu
->is_dwz
)
3922 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
3924 abbrev
= &dwarf2_per_objfile
->abbrev
;
3929 /* Subroutine of read_and_check_comp_unit_head and
3930 read_and_check_type_unit_head to simplify them.
3931 Perform various error checking on the header. */
3934 error_check_comp_unit_head (struct comp_unit_head
*header
,
3935 struct dwarf2_section_info
*section
,
3936 struct dwarf2_section_info
*abbrev_section
)
3938 bfd
*abfd
= section
->asection
->owner
;
3939 const char *filename
= bfd_get_filename (abfd
);
3941 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
3942 error (_("Dwarf Error: wrong version in compilation unit header "
3943 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
3946 if (header
->abbrev_offset
.sect_off
3947 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
3948 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
3949 "(offset 0x%lx + 6) [in module %s]"),
3950 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
3953 /* Cast to unsigned long to use 64-bit arithmetic when possible to
3954 avoid potential 32-bit overflow. */
3955 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
3957 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
3958 "(offset 0x%lx + 0) [in module %s]"),
3959 (long) header
->length
, (long) header
->offset
.sect_off
,
3963 /* Read in a CU/TU header and perform some basic error checking.
3964 The contents of the header are stored in HEADER.
3965 The result is a pointer to the start of the first DIE. */
3968 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
3969 struct dwarf2_section_info
*section
,
3970 struct dwarf2_section_info
*abbrev_section
,
3972 int is_debug_types_section
)
3974 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3975 bfd
*abfd
= section
->asection
->owner
;
3977 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3979 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3981 /* If we're reading a type unit, skip over the signature and
3982 type_offset fields. */
3983 if (is_debug_types_section
)
3984 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
3986 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
3988 error_check_comp_unit_head (header
, section
, abbrev_section
);
3993 /* Read in the types comp unit header information from .debug_types entry at
3994 types_ptr. The result is a pointer to one past the end of the header. */
3997 read_and_check_type_unit_head (struct comp_unit_head
*header
,
3998 struct dwarf2_section_info
*section
,
3999 struct dwarf2_section_info
*abbrev_section
,
4001 ULONGEST
*signature
,
4002 cu_offset
*type_offset_in_tu
)
4004 gdb_byte
*beg_of_comp_unit
= info_ptr
;
4005 bfd
*abfd
= section
->asection
->owner
;
4007 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4009 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4011 /* If we're reading a type unit, skip over the signature and
4012 type_offset fields. */
4013 if (signature
!= NULL
)
4014 *signature
= read_8_bytes (abfd
, info_ptr
);
4016 if (type_offset_in_tu
!= NULL
)
4017 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4018 header
->offset_size
);
4019 info_ptr
+= header
->offset_size
;
4021 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4023 error_check_comp_unit_head (header
, section
, abbrev_section
);
4028 /* Fetch the abbreviation table offset from a comp or type unit header. */
4031 read_abbrev_offset (struct dwarf2_section_info
*section
,
4034 bfd
*abfd
= section
->asection
->owner
;
4036 unsigned int length
, initial_length_size
, offset_size
;
4037 sect_offset abbrev_offset
;
4039 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4040 info_ptr
= section
->buffer
+ offset
.sect_off
;
4041 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4042 offset_size
= initial_length_size
== 4 ? 4 : 8;
4043 info_ptr
+= initial_length_size
+ 2 /*version*/;
4044 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4045 return abbrev_offset
;
4048 /* Allocate a new partial symtab for file named NAME and mark this new
4049 partial symtab as being an include of PST. */
4052 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
4053 struct objfile
*objfile
)
4055 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4057 subpst
->section_offsets
= pst
->section_offsets
;
4058 subpst
->textlow
= 0;
4059 subpst
->texthigh
= 0;
4061 subpst
->dependencies
= (struct partial_symtab
**)
4062 obstack_alloc (&objfile
->objfile_obstack
,
4063 sizeof (struct partial_symtab
*));
4064 subpst
->dependencies
[0] = pst
;
4065 subpst
->number_of_dependencies
= 1;
4067 subpst
->globals_offset
= 0;
4068 subpst
->n_global_syms
= 0;
4069 subpst
->statics_offset
= 0;
4070 subpst
->n_static_syms
= 0;
4071 subpst
->symtab
= NULL
;
4072 subpst
->read_symtab
= pst
->read_symtab
;
4075 /* No private part is necessary for include psymtabs. This property
4076 can be used to differentiate between such include psymtabs and
4077 the regular ones. */
4078 subpst
->read_symtab_private
= NULL
;
4081 /* Read the Line Number Program data and extract the list of files
4082 included by the source file represented by PST. Build an include
4083 partial symtab for each of these included files. */
4086 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4087 struct die_info
*die
,
4088 struct partial_symtab
*pst
)
4090 struct line_header
*lh
= NULL
;
4091 struct attribute
*attr
;
4093 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4095 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4097 return; /* No linetable, so no includes. */
4099 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4100 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, 1);
4102 free_line_header (lh
);
4106 hash_signatured_type (const void *item
)
4108 const struct signatured_type
*sig_type
= item
;
4110 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4111 return sig_type
->signature
;
4115 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4117 const struct signatured_type
*lhs
= item_lhs
;
4118 const struct signatured_type
*rhs
= item_rhs
;
4120 return lhs
->signature
== rhs
->signature
;
4123 /* Allocate a hash table for signatured types. */
4126 allocate_signatured_type_table (struct objfile
*objfile
)
4128 return htab_create_alloc_ex (41,
4129 hash_signatured_type
,
4132 &objfile
->objfile_obstack
,
4133 hashtab_obstack_allocate
,
4134 dummy_obstack_deallocate
);
4137 /* A helper function to add a signatured type CU to a table. */
4140 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4142 struct signatured_type
*sigt
= *slot
;
4143 struct signatured_type
***datap
= datum
;
4151 /* Create the hash table of all entries in the .debug_types section.
4152 DWO_FILE is a pointer to the DWO file for .debug_types.dwo,
4154 Note: This function processes DWO files only, not DWP files.
4155 The result is a pointer to the hash table or NULL if there are
4159 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4160 VEC (dwarf2_section_info_def
) *types
)
4162 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4163 htab_t types_htab
= NULL
;
4165 struct dwarf2_section_info
*section
;
4166 struct dwarf2_section_info
*abbrev_section
;
4168 if (VEC_empty (dwarf2_section_info_def
, types
))
4171 abbrev_section
= (dwo_file
!= NULL
4172 ? &dwo_file
->sections
.abbrev
4173 : &dwarf2_per_objfile
->abbrev
);
4175 if (dwarf2_read_debug
)
4176 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4177 dwo_file
? ".dwo" : "",
4178 bfd_get_filename (abbrev_section
->asection
->owner
));
4181 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4185 gdb_byte
*info_ptr
, *end_ptr
;
4186 struct dwarf2_section_info
*abbrev_section
;
4188 dwarf2_read_section (objfile
, section
);
4189 info_ptr
= section
->buffer
;
4191 if (info_ptr
== NULL
)
4194 /* We can't set abfd until now because the section may be empty or
4195 not present, in which case section->asection will be NULL. */
4196 abfd
= section
->asection
->owner
;
4199 abbrev_section
= &dwo_file
->sections
.abbrev
;
4201 abbrev_section
= &dwarf2_per_objfile
->abbrev
;
4203 if (types_htab
== NULL
)
4206 types_htab
= allocate_dwo_unit_table (objfile
);
4208 types_htab
= allocate_signatured_type_table (objfile
);
4211 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4212 because we don't need to read any dies: the signature is in the
4215 end_ptr
= info_ptr
+ section
->size
;
4216 while (info_ptr
< end_ptr
)
4219 cu_offset type_offset_in_tu
;
4221 struct signatured_type
*sig_type
;
4222 struct dwo_unit
*dwo_tu
;
4224 gdb_byte
*ptr
= info_ptr
;
4225 struct comp_unit_head header
;
4226 unsigned int length
;
4228 offset
.sect_off
= ptr
- section
->buffer
;
4230 /* We need to read the type's signature in order to build the hash
4231 table, but we don't need anything else just yet. */
4233 ptr
= read_and_check_type_unit_head (&header
, section
,
4234 abbrev_section
, ptr
,
4235 &signature
, &type_offset_in_tu
);
4237 length
= get_cu_length (&header
);
4239 /* Skip dummy type units. */
4240 if (ptr
>= info_ptr
+ length
4241 || peek_abbrev_code (abfd
, ptr
) == 0)
4250 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4252 dwo_tu
->dwo_file
= dwo_file
;
4253 dwo_tu
->signature
= signature
;
4254 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4255 dwo_tu
->info_or_types_section
= section
;
4256 dwo_tu
->offset
= offset
;
4257 dwo_tu
->length
= length
;
4261 /* N.B.: type_offset is not usable if this type uses a DWO file.
4262 The real type_offset is in the DWO file. */
4264 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4265 struct signatured_type
);
4266 sig_type
->signature
= signature
;
4267 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4268 sig_type
->per_cu
.objfile
= objfile
;
4269 sig_type
->per_cu
.is_debug_types
= 1;
4270 sig_type
->per_cu
.info_or_types_section
= section
;
4271 sig_type
->per_cu
.offset
= offset
;
4272 sig_type
->per_cu
.length
= length
;
4275 slot
= htab_find_slot (types_htab
,
4276 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4278 gdb_assert (slot
!= NULL
);
4281 sect_offset dup_offset
;
4285 const struct dwo_unit
*dup_tu
= *slot
;
4287 dup_offset
= dup_tu
->offset
;
4291 const struct signatured_type
*dup_tu
= *slot
;
4293 dup_offset
= dup_tu
->per_cu
.offset
;
4296 complaint (&symfile_complaints
,
4297 _("debug type entry at offset 0x%x is duplicate to the "
4298 "entry at offset 0x%x, signature 0x%s"),
4299 offset
.sect_off
, dup_offset
.sect_off
,
4300 phex (signature
, sizeof (signature
)));
4302 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4304 if (dwarf2_read_debug
)
4305 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
4307 phex (signature
, sizeof (signature
)));
4316 /* Create the hash table of all entries in the .debug_types section,
4317 and initialize all_type_units.
4318 The result is zero if there is an error (e.g. missing .debug_types section),
4319 otherwise non-zero. */
4322 create_all_type_units (struct objfile
*objfile
)
4325 struct signatured_type
**iter
;
4327 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4328 if (types_htab
== NULL
)
4330 dwarf2_per_objfile
->signatured_types
= NULL
;
4334 dwarf2_per_objfile
->signatured_types
= types_htab
;
4336 dwarf2_per_objfile
->n_type_units
= htab_elements (types_htab
);
4337 dwarf2_per_objfile
->all_type_units
4338 = obstack_alloc (&objfile
->objfile_obstack
,
4339 dwarf2_per_objfile
->n_type_units
4340 * sizeof (struct signatured_type
*));
4341 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4342 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4343 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4344 == dwarf2_per_objfile
->n_type_units
);
4349 /* Lookup a signature based type for DW_FORM_ref_sig8.
4350 Returns NULL if signature SIG is not present in the table. */
4352 static struct signatured_type
*
4353 lookup_signatured_type (ULONGEST sig
)
4355 struct signatured_type find_entry
, *entry
;
4357 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4359 complaint (&symfile_complaints
,
4360 _("missing `.debug_types' section for DW_FORM_ref_sig8 die"));
4364 find_entry
.signature
= sig
;
4365 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
4369 /* Low level DIE reading support. */
4371 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
4374 init_cu_die_reader (struct die_reader_specs
*reader
,
4375 struct dwarf2_cu
*cu
,
4376 struct dwarf2_section_info
*section
,
4377 struct dwo_file
*dwo_file
)
4379 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
4380 reader
->abfd
= section
->asection
->owner
;
4382 reader
->dwo_file
= dwo_file
;
4383 reader
->die_section
= section
;
4384 reader
->buffer
= section
->buffer
;
4385 reader
->buffer_end
= section
->buffer
+ section
->size
;
4388 /* Initialize a CU (or TU) and read its DIEs.
4389 If the CU defers to a DWO file, read the DWO file as well.
4391 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
4392 Otherwise the table specified in the comp unit header is read in and used.
4393 This is an optimization for when we already have the abbrev table.
4395 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
4396 Otherwise, a new CU is allocated with xmalloc.
4398 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
4399 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
4401 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4402 linker) then DIE_READER_FUNC will not get called. */
4405 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
4406 struct abbrev_table
*abbrev_table
,
4407 int use_existing_cu
, int keep
,
4408 die_reader_func_ftype
*die_reader_func
,
4411 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4412 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4413 bfd
*abfd
= section
->asection
->owner
;
4414 struct dwarf2_cu
*cu
;
4415 gdb_byte
*begin_info_ptr
, *info_ptr
;
4416 struct die_reader_specs reader
;
4417 struct die_info
*comp_unit_die
;
4419 struct attribute
*attr
;
4420 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
4421 struct signatured_type
*sig_type
= NULL
;
4422 struct dwarf2_section_info
*abbrev_section
;
4423 /* Non-zero if CU currently points to a DWO file and we need to
4424 reread it. When this happens we need to reread the skeleton die
4425 before we can reread the DWO file. */
4426 int rereading_dwo_cu
= 0;
4428 if (dwarf2_die_debug
)
4429 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4430 this_cu
->is_debug_types
? "type" : "comp",
4431 this_cu
->offset
.sect_off
);
4433 if (use_existing_cu
)
4436 cleanups
= make_cleanup (null_cleanup
, NULL
);
4438 /* This is cheap if the section is already read in. */
4439 dwarf2_read_section (objfile
, section
);
4441 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4443 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
4445 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
4449 /* If this CU is from a DWO file we need to start over, we need to
4450 refetch the attributes from the skeleton CU.
4451 This could be optimized by retrieving those attributes from when we
4452 were here the first time: the previous comp_unit_die was stored in
4453 comp_unit_obstack. But there's no data yet that we need this
4455 if (cu
->dwo_unit
!= NULL
)
4456 rereading_dwo_cu
= 1;
4460 /* If !use_existing_cu, this_cu->cu must be NULL. */
4461 gdb_assert (this_cu
->cu
== NULL
);
4463 cu
= xmalloc (sizeof (*cu
));
4464 init_one_comp_unit (cu
, this_cu
);
4466 /* If an error occurs while loading, release our storage. */
4467 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
4470 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
4472 /* We already have the header, there's no need to read it in again. */
4473 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
4477 if (this_cu
->is_debug_types
)
4480 cu_offset type_offset_in_tu
;
4482 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4483 abbrev_section
, info_ptr
,
4485 &type_offset_in_tu
);
4487 /* Since per_cu is the first member of struct signatured_type,
4488 we can go from a pointer to one to a pointer to the other. */
4489 sig_type
= (struct signatured_type
*) this_cu
;
4490 gdb_assert (sig_type
->signature
== signature
);
4491 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
4492 == type_offset_in_tu
.cu_off
);
4493 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4495 /* LENGTH has not been set yet for type units if we're
4496 using .gdb_index. */
4497 this_cu
->length
= get_cu_length (&cu
->header
);
4499 /* Establish the type offset that can be used to lookup the type. */
4500 sig_type
->type_offset_in_section
.sect_off
=
4501 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
4505 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4509 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4510 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
4514 /* Skip dummy compilation units. */
4515 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4516 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4518 do_cleanups (cleanups
);
4522 /* If we don't have them yet, read the abbrevs for this compilation unit.
4523 And if we need to read them now, make sure they're freed when we're
4524 done. Note that it's important that if the CU had an abbrev table
4525 on entry we don't free it when we're done: Somewhere up the call stack
4526 it may be in use. */
4527 if (abbrev_table
!= NULL
)
4529 gdb_assert (cu
->abbrev_table
== NULL
);
4530 gdb_assert (cu
->header
.abbrev_offset
.sect_off
4531 == abbrev_table
->offset
.sect_off
);
4532 cu
->abbrev_table
= abbrev_table
;
4534 else if (cu
->abbrev_table
== NULL
)
4536 dwarf2_read_abbrevs (cu
, abbrev_section
);
4537 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4539 else if (rereading_dwo_cu
)
4541 dwarf2_free_abbrev_table (cu
);
4542 dwarf2_read_abbrevs (cu
, abbrev_section
);
4545 /* Read the top level CU/TU die. */
4546 init_cu_die_reader (&reader
, cu
, section
, NULL
);
4547 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4549 /* If we have a DWO stub, process it and then read in the DWO file.
4550 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains
4551 a DWO CU, that this test will fail. */
4552 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
4555 const char *dwo_name
= DW_STRING (attr
);
4556 const char *comp_dir_string
;
4557 struct dwo_unit
*dwo_unit
;
4558 ULONGEST signature
; /* Or dwo_id. */
4559 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
4560 int i
,num_extra_attrs
;
4561 struct dwarf2_section_info
*dwo_abbrev_section
;
4564 error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name"
4565 " has children (offset 0x%x) [in module %s]"),
4566 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
4568 /* These attributes aren't processed until later:
4569 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
4570 However, the attribute is found in the stub which we won't have later.
4571 In order to not impose this complication on the rest of the code,
4572 we read them here and copy them to the DWO CU/TU die. */
4574 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
4577 if (! this_cu
->is_debug_types
)
4578 stmt_list
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
4579 low_pc
= dwarf2_attr (comp_unit_die
, DW_AT_low_pc
, cu
);
4580 high_pc
= dwarf2_attr (comp_unit_die
, DW_AT_high_pc
, cu
);
4581 ranges
= dwarf2_attr (comp_unit_die
, DW_AT_ranges
, cu
);
4582 comp_dir
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4584 /* There should be a DW_AT_addr_base attribute here (if needed).
4585 We need the value before we can process DW_FORM_GNU_addr_index. */
4587 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
4589 cu
->addr_base
= DW_UNSND (attr
);
4591 /* There should be a DW_AT_ranges_base attribute here (if needed).
4592 We need the value before we can process DW_AT_ranges. */
4593 cu
->ranges_base
= 0;
4594 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
4596 cu
->ranges_base
= DW_UNSND (attr
);
4598 if (this_cu
->is_debug_types
)
4600 gdb_assert (sig_type
!= NULL
);
4601 signature
= sig_type
->signature
;
4605 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
4607 error (_("Dwarf Error: missing dwo_id [in module %s]"),
4609 signature
= DW_UNSND (attr
);
4612 /* We may need the comp_dir in order to find the DWO file. */
4613 comp_dir_string
= NULL
;
4615 comp_dir_string
= DW_STRING (comp_dir
);
4617 if (this_cu
->is_debug_types
)
4618 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir_string
);
4620 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir_string
,
4623 if (dwo_unit
== NULL
)
4625 error (_("Dwarf Error: CU at offset 0x%x references unknown DWO"
4626 " with ID %s [in module %s]"),
4627 this_cu
->offset
.sect_off
,
4628 phex (signature
, sizeof (signature
)),
4632 /* Set up for reading the DWO CU/TU. */
4633 cu
->dwo_unit
= dwo_unit
;
4634 section
= dwo_unit
->info_or_types_section
;
4635 dwarf2_read_section (objfile
, section
);
4636 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
4637 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
4638 init_cu_die_reader (&reader
, cu
, section
, dwo_unit
->dwo_file
);
4640 if (this_cu
->is_debug_types
)
4643 cu_offset type_offset_in_tu
;
4645 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4649 &type_offset_in_tu
);
4650 gdb_assert (sig_type
->signature
== signature
);
4651 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4652 /* For DWOs coming from DWP files, we don't know the CU length
4653 nor the type's offset in the TU until now. */
4654 dwo_unit
->length
= get_cu_length (&cu
->header
);
4655 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
4657 /* Establish the type offset that can be used to lookup the type.
4658 For DWO files, we don't know it until now. */
4659 sig_type
->type_offset_in_section
.sect_off
=
4660 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
4664 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4667 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4668 /* For DWOs coming from DWP files, we don't know the CU length
4670 dwo_unit
->length
= get_cu_length (&cu
->header
);
4673 /* Discard the original CU's abbrev table, and read the DWO's. */
4674 if (abbrev_table
== NULL
)
4676 dwarf2_free_abbrev_table (cu
);
4677 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4681 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4682 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4685 /* Read in the die, but leave space to copy over the attributes
4686 from the stub. This has the benefit of simplifying the rest of
4687 the code - all the real work is done here. */
4688 num_extra_attrs
= ((stmt_list
!= NULL
)
4692 + (comp_dir
!= NULL
));
4693 info_ptr
= read_full_die_1 (&reader
, &comp_unit_die
, info_ptr
,
4694 &has_children
, num_extra_attrs
);
4696 /* Copy over the attributes from the stub to the DWO die. */
4697 i
= comp_unit_die
->num_attrs
;
4698 if (stmt_list
!= NULL
)
4699 comp_unit_die
->attrs
[i
++] = *stmt_list
;
4701 comp_unit_die
->attrs
[i
++] = *low_pc
;
4702 if (high_pc
!= NULL
)
4703 comp_unit_die
->attrs
[i
++] = *high_pc
;
4705 comp_unit_die
->attrs
[i
++] = *ranges
;
4706 if (comp_dir
!= NULL
)
4707 comp_unit_die
->attrs
[i
++] = *comp_dir
;
4708 comp_unit_die
->num_attrs
+= num_extra_attrs
;
4710 /* Skip dummy compilation units. */
4711 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
4712 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4714 do_cleanups (cleanups
);
4719 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4721 if (free_cu_cleanup
!= NULL
)
4725 /* We've successfully allocated this compilation unit. Let our
4726 caller clean it up when finished with it. */
4727 discard_cleanups (free_cu_cleanup
);
4729 /* We can only discard free_cu_cleanup and all subsequent cleanups.
4730 So we have to manually free the abbrev table. */
4731 dwarf2_free_abbrev_table (cu
);
4733 /* Link this CU into read_in_chain. */
4734 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4735 dwarf2_per_objfile
->read_in_chain
= this_cu
;
4738 do_cleanups (free_cu_cleanup
);
4741 do_cleanups (cleanups
);
4744 /* Read CU/TU THIS_CU in section SECTION,
4745 but do not follow DW_AT_GNU_dwo_name if present.
4746 DWOP_FILE, if non-NULL, is the DWO/DWP file to read (the caller is assumed
4747 to have already done the lookup to find the DWO/DWP file).
4749 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
4750 THIS_CU->is_debug_types, but nothing else.
4752 We fill in THIS_CU->length.
4754 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4755 linker) then DIE_READER_FUNC will not get called.
4757 THIS_CU->cu is always freed when done.
4758 This is done in order to not leave THIS_CU->cu in a state where we have
4759 to care whether it refers to the "main" CU or the DWO CU. */
4762 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
4763 struct dwarf2_section_info
*abbrev_section
,
4764 struct dwo_file
*dwo_file
,
4765 die_reader_func_ftype
*die_reader_func
,
4768 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4769 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4770 bfd
*abfd
= section
->asection
->owner
;
4771 struct dwarf2_cu cu
;
4772 gdb_byte
*begin_info_ptr
, *info_ptr
;
4773 struct die_reader_specs reader
;
4774 struct cleanup
*cleanups
;
4775 struct die_info
*comp_unit_die
;
4778 if (dwarf2_die_debug
)
4779 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4780 this_cu
->is_debug_types
? "type" : "comp",
4781 this_cu
->offset
.sect_off
);
4783 gdb_assert (this_cu
->cu
== NULL
);
4785 /* This is cheap if the section is already read in. */
4786 dwarf2_read_section (objfile
, section
);
4788 init_one_comp_unit (&cu
, this_cu
);
4790 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
4792 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4793 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
4794 abbrev_section
, info_ptr
,
4795 this_cu
->is_debug_types
);
4797 this_cu
->length
= get_cu_length (&cu
.header
);
4799 /* Skip dummy compilation units. */
4800 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4801 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4803 do_cleanups (cleanups
);
4807 dwarf2_read_abbrevs (&cu
, abbrev_section
);
4808 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
4810 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
4811 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4813 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4815 do_cleanups (cleanups
);
4818 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
4819 does not lookup the specified DWO file.
4820 This cannot be used to read DWO files.
4822 THIS_CU->cu is always freed when done.
4823 This is done in order to not leave THIS_CU->cu in a state where we have
4824 to care whether it refers to the "main" CU or the DWO CU.
4825 We can revisit this if the data shows there's a performance issue. */
4828 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
4829 die_reader_func_ftype
*die_reader_func
,
4832 init_cutu_and_read_dies_no_follow (this_cu
,
4833 get_abbrev_section_for_cu (this_cu
),
4835 die_reader_func
, data
);
4838 /* Create a psymtab named NAME and assign it to PER_CU.
4840 The caller must fill in the following details:
4841 dirname, textlow, texthigh. */
4843 static struct partial_symtab
*
4844 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
4846 struct objfile
*objfile
= per_cu
->objfile
;
4847 struct partial_symtab
*pst
;
4849 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
4851 objfile
->global_psymbols
.next
,
4852 objfile
->static_psymbols
.next
);
4854 pst
->psymtabs_addrmap_supported
= 1;
4856 /* This is the glue that links PST into GDB's symbol API. */
4857 pst
->read_symtab_private
= per_cu
;
4858 pst
->read_symtab
= dwarf2_read_symtab
;
4859 per_cu
->v
.psymtab
= pst
;
4864 /* die_reader_func for process_psymtab_comp_unit. */
4867 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
4869 struct die_info
*comp_unit_die
,
4873 struct dwarf2_cu
*cu
= reader
->cu
;
4874 struct objfile
*objfile
= cu
->objfile
;
4875 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
4876 struct attribute
*attr
;
4878 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
4879 struct partial_symtab
*pst
;
4881 const char *filename
;
4882 int *want_partial_unit_ptr
= data
;
4884 if (comp_unit_die
->tag
== DW_TAG_partial_unit
4885 && (want_partial_unit_ptr
== NULL
4886 || !*want_partial_unit_ptr
))
4889 gdb_assert (! per_cu
->is_debug_types
);
4891 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
4893 cu
->list_in_scope
= &file_symbols
;
4895 /* Allocate a new partial symbol table structure. */
4896 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
4897 if (attr
== NULL
|| !DW_STRING (attr
))
4900 filename
= DW_STRING (attr
);
4902 pst
= create_partial_symtab (per_cu
, filename
);
4904 /* This must be done before calling dwarf2_build_include_psymtabs. */
4905 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4907 pst
->dirname
= DW_STRING (attr
);
4909 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4911 dwarf2_find_base_address (comp_unit_die
, cu
);
4913 /* Possibly set the default values of LOWPC and HIGHPC from
4915 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
4916 &best_highpc
, cu
, pst
);
4917 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
4918 /* Store the contiguous range if it is not empty; it can be empty for
4919 CUs with no code. */
4920 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4921 best_lowpc
+ baseaddr
,
4922 best_highpc
+ baseaddr
- 1, pst
);
4924 /* Check if comp unit has_children.
4925 If so, read the rest of the partial symbols from this comp unit.
4926 If not, there's no more debug_info for this comp unit. */
4929 struct partial_die_info
*first_die
;
4930 CORE_ADDR lowpc
, highpc
;
4932 lowpc
= ((CORE_ADDR
) -1);
4933 highpc
= ((CORE_ADDR
) 0);
4935 first_die
= load_partial_dies (reader
, info_ptr
, 1);
4937 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
4940 /* If we didn't find a lowpc, set it to highpc to avoid
4941 complaints from `maint check'. */
4942 if (lowpc
== ((CORE_ADDR
) -1))
4945 /* If the compilation unit didn't have an explicit address range,
4946 then use the information extracted from its child dies. */
4950 best_highpc
= highpc
;
4953 pst
->textlow
= best_lowpc
+ baseaddr
;
4954 pst
->texthigh
= best_highpc
+ baseaddr
;
4956 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
4957 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
4958 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
4959 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
4960 sort_pst_symbols (objfile
, pst
);
4962 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
))
4965 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
);
4966 struct dwarf2_per_cu_data
*iter
;
4968 /* Fill in 'dependencies' here; we fill in 'users' in a
4970 pst
->number_of_dependencies
= len
;
4971 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
4972 len
* sizeof (struct symtab
*));
4974 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
,
4977 pst
->dependencies
[i
] = iter
->v
.psymtab
;
4979 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
);
4982 /* Get the list of files included in the current compilation unit,
4983 and build a psymtab for each of them. */
4984 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
4986 if (dwarf2_read_debug
)
4988 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4990 fprintf_unfiltered (gdb_stdlog
,
4991 "Psymtab for %s unit @0x%x: %s - %s"
4992 ", %d global, %d static syms\n",
4993 per_cu
->is_debug_types
? "type" : "comp",
4994 per_cu
->offset
.sect_off
,
4995 paddress (gdbarch
, pst
->textlow
),
4996 paddress (gdbarch
, pst
->texthigh
),
4997 pst
->n_global_syms
, pst
->n_static_syms
);
5001 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5002 Process compilation unit THIS_CU for a psymtab. */
5005 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
5006 int want_partial_unit
)
5008 /* If this compilation unit was already read in, free the
5009 cached copy in order to read it in again. This is
5010 necessary because we skipped some symbols when we first
5011 read in the compilation unit (see load_partial_dies).
5012 This problem could be avoided, but the benefit is unclear. */
5013 if (this_cu
->cu
!= NULL
)
5014 free_one_cached_comp_unit (this_cu
);
5016 gdb_assert (! this_cu
->is_debug_types
);
5017 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
5018 process_psymtab_comp_unit_reader
,
5019 &want_partial_unit
);
5021 /* Age out any secondary CUs. */
5022 age_cached_comp_units ();
5026 hash_type_unit_group (const void *item
)
5028 const struct type_unit_group
*tu_group
= item
;
5030 return hash_stmt_list_entry (&tu_group
->hash
);
5034 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5036 const struct type_unit_group
*lhs
= item_lhs
;
5037 const struct type_unit_group
*rhs
= item_rhs
;
5039 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5042 /* Allocate a hash table for type unit groups. */
5045 allocate_type_unit_groups_table (void)
5047 return htab_create_alloc_ex (3,
5048 hash_type_unit_group
,
5051 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5052 hashtab_obstack_allocate
,
5053 dummy_obstack_deallocate
);
5056 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5057 partial symtabs. We combine several TUs per psymtab to not let the size
5058 of any one psymtab grow too big. */
5059 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5060 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5062 /* Helper routine for get_type_unit_group.
5063 Create the type_unit_group object used to hold one or more TUs. */
5065 static struct type_unit_group
*
5066 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5068 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5069 struct dwarf2_per_cu_data
*per_cu
;
5070 struct type_unit_group
*tu_group
;
5072 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5073 struct type_unit_group
);
5074 per_cu
= &tu_group
->per_cu
;
5075 per_cu
->objfile
= objfile
;
5076 per_cu
->is_debug_types
= 1;
5077 per_cu
->s
.type_unit_group
= tu_group
;
5079 if (dwarf2_per_objfile
->using_index
)
5081 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5082 struct dwarf2_per_cu_quick_data
);
5083 tu_group
->t
.first_tu
= cu
->per_cu
;
5087 unsigned int line_offset
= line_offset_struct
.sect_off
;
5088 struct partial_symtab
*pst
;
5091 /* Give the symtab a useful name for debug purposes. */
5092 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5093 name
= xstrprintf ("<type_units_%d>",
5094 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5096 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5098 pst
= create_partial_symtab (per_cu
, name
);
5104 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5105 tu_group
->hash
.line_offset
= line_offset_struct
;
5110 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5111 STMT_LIST is a DW_AT_stmt_list attribute. */
5113 static struct type_unit_group
*
5114 get_type_unit_group (struct dwarf2_cu
*cu
, struct attribute
*stmt_list
)
5116 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5117 struct type_unit_group
*tu_group
;
5119 unsigned int line_offset
;
5120 struct type_unit_group type_unit_group_for_lookup
;
5122 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5124 dwarf2_per_objfile
->type_unit_groups
=
5125 allocate_type_unit_groups_table ();
5128 /* Do we need to create a new group, or can we use an existing one? */
5132 line_offset
= DW_UNSND (stmt_list
);
5133 ++tu_stats
->nr_symtab_sharers
;
5137 /* Ugh, no stmt_list. Rare, but we have to handle it.
5138 We can do various things here like create one group per TU or
5139 spread them over multiple groups to split up the expansion work.
5140 To avoid worst case scenarios (too many groups or too large groups)
5141 we, umm, group them in bunches. */
5142 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5143 | (tu_stats
->nr_stmt_less_type_units
5144 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5145 ++tu_stats
->nr_stmt_less_type_units
;
5148 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5149 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5150 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5151 &type_unit_group_for_lookup
, INSERT
);
5155 gdb_assert (tu_group
!= NULL
);
5159 sect_offset line_offset_struct
;
5161 line_offset_struct
.sect_off
= line_offset
;
5162 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5164 ++tu_stats
->nr_symtabs
;
5170 /* Struct used to sort TUs by their abbreviation table offset. */
5172 struct tu_abbrev_offset
5174 struct signatured_type
*sig_type
;
5175 sect_offset abbrev_offset
;
5178 /* Helper routine for build_type_unit_groups, passed to qsort. */
5181 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
5183 const struct tu_abbrev_offset
* const *a
= ap
;
5184 const struct tu_abbrev_offset
* const *b
= bp
;
5185 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
5186 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
5188 return (aoff
> boff
) - (aoff
< boff
);
5191 /* A helper function to add a type_unit_group to a table. */
5194 add_type_unit_group_to_table (void **slot
, void *datum
)
5196 struct type_unit_group
*tu_group
= *slot
;
5197 struct type_unit_group
***datap
= datum
;
5205 /* Efficiently read all the type units, calling init_cutu_and_read_dies on
5206 each one passing FUNC,DATA.
5208 The efficiency is because we sort TUs by the abbrev table they use and
5209 only read each abbrev table once. In one program there are 200K TUs
5210 sharing 8K abbrev tables.
5212 The main purpose of this function is to support building the
5213 dwarf2_per_objfile->type_unit_groups table.
5214 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
5215 can collapse the search space by grouping them by stmt_list.
5216 The savings can be significant, in the same program from above the 200K TUs
5217 share 8K stmt_list tables.
5219 FUNC is expected to call get_type_unit_group, which will create the
5220 struct type_unit_group if necessary and add it to
5221 dwarf2_per_objfile->type_unit_groups. */
5224 build_type_unit_groups (die_reader_func_ftype
*func
, void *data
)
5226 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5227 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5228 struct cleanup
*cleanups
;
5229 struct abbrev_table
*abbrev_table
;
5230 sect_offset abbrev_offset
;
5231 struct tu_abbrev_offset
*sorted_by_abbrev
;
5232 struct type_unit_group
**iter
;
5235 /* It's up to the caller to not call us multiple times. */
5236 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
5238 if (dwarf2_per_objfile
->n_type_units
== 0)
5241 /* TUs typically share abbrev tables, and there can be way more TUs than
5242 abbrev tables. Sort by abbrev table to reduce the number of times we
5243 read each abbrev table in.
5244 Alternatives are to punt or to maintain a cache of abbrev tables.
5245 This is simpler and efficient enough for now.
5247 Later we group TUs by their DW_AT_stmt_list value (as this defines the
5248 symtab to use). Typically TUs with the same abbrev offset have the same
5249 stmt_list value too so in practice this should work well.
5251 The basic algorithm here is:
5253 sort TUs by abbrev table
5254 for each TU with same abbrev table:
5255 read abbrev table if first user
5256 read TU top level DIE
5257 [IWBN if DWO skeletons had DW_AT_stmt_list]
5260 if (dwarf2_read_debug
)
5261 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
5263 /* Sort in a separate table to maintain the order of all_type_units
5264 for .gdb_index: TU indices directly index all_type_units. */
5265 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
5266 dwarf2_per_objfile
->n_type_units
);
5267 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
5269 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
5271 sorted_by_abbrev
[i
].sig_type
= sig_type
;
5272 sorted_by_abbrev
[i
].abbrev_offset
=
5273 read_abbrev_offset (sig_type
->per_cu
.info_or_types_section
,
5274 sig_type
->per_cu
.offset
);
5276 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
5277 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
5278 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
5280 /* Note: In the .gdb_index case, get_type_unit_group may have already been
5281 called any number of times, so we don't reset tu_stats here. */
5283 abbrev_offset
.sect_off
= ~(unsigned) 0;
5284 abbrev_table
= NULL
;
5285 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
5287 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
5289 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
5291 /* Switch to the next abbrev table if necessary. */
5292 if (abbrev_table
== NULL
5293 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
5295 if (abbrev_table
!= NULL
)
5297 abbrev_table_free (abbrev_table
);
5298 /* Reset to NULL in case abbrev_table_read_table throws
5299 an error: abbrev_table_free_cleanup will get called. */
5300 abbrev_table
= NULL
;
5302 abbrev_offset
= tu
->abbrev_offset
;
5304 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
5306 ++tu_stats
->nr_uniq_abbrev_tables
;
5309 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
5313 /* Create a vector of pointers to primary type units to make it easy to
5314 iterate over them and CUs. See dw2_get_primary_cu. */
5315 dwarf2_per_objfile
->n_type_unit_groups
=
5316 htab_elements (dwarf2_per_objfile
->type_unit_groups
);
5317 dwarf2_per_objfile
->all_type_unit_groups
=
5318 obstack_alloc (&objfile
->objfile_obstack
,
5319 dwarf2_per_objfile
->n_type_unit_groups
5320 * sizeof (struct type_unit_group
*));
5321 iter
= &dwarf2_per_objfile
->all_type_unit_groups
[0];
5322 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
5323 add_type_unit_group_to_table
, &iter
);
5324 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_unit_groups
[0]
5325 == dwarf2_per_objfile
->n_type_unit_groups
);
5327 do_cleanups (cleanups
);
5329 if (dwarf2_read_debug
)
5331 fprintf_unfiltered (gdb_stdlog
, "Done building type unit groups:\n");
5332 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
5333 dwarf2_per_objfile
->n_type_units
);
5334 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
5335 tu_stats
->nr_uniq_abbrev_tables
);
5336 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
5337 tu_stats
->nr_symtabs
);
5338 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
5339 tu_stats
->nr_symtab_sharers
);
5340 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
5341 tu_stats
->nr_stmt_less_type_units
);
5345 /* Reader function for build_type_psymtabs. */
5348 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
5350 struct die_info
*type_unit_die
,
5354 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5355 struct dwarf2_cu
*cu
= reader
->cu
;
5356 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5357 struct type_unit_group
*tu_group
;
5358 struct attribute
*attr
;
5359 struct partial_die_info
*first_die
;
5360 CORE_ADDR lowpc
, highpc
;
5361 struct partial_symtab
*pst
;
5363 gdb_assert (data
== NULL
);
5368 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
5369 tu_group
= get_type_unit_group (cu
, attr
);
5371 VEC_safe_push (dwarf2_per_cu_ptr
, tu_group
->t
.tus
, per_cu
);
5373 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
5374 cu
->list_in_scope
= &file_symbols
;
5375 pst
= create_partial_symtab (per_cu
, "");
5378 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5380 lowpc
= (CORE_ADDR
) -1;
5381 highpc
= (CORE_ADDR
) 0;
5382 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
5384 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
5385 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
5386 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
5387 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
5388 sort_pst_symbols (objfile
, pst
);
5391 /* Traversal function for build_type_psymtabs. */
5394 build_type_psymtab_dependencies (void **slot
, void *info
)
5396 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5397 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
5398 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
5399 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5400 int len
= VEC_length (dwarf2_per_cu_ptr
, tu_group
->t
.tus
);
5401 struct dwarf2_per_cu_data
*iter
;
5404 gdb_assert (len
> 0);
5406 pst
->number_of_dependencies
= len
;
5407 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
5408 len
* sizeof (struct psymtab
*));
5410 VEC_iterate (dwarf2_per_cu_ptr
, tu_group
->t
.tus
, i
, iter
);
5413 pst
->dependencies
[i
] = iter
->v
.psymtab
;
5414 iter
->s
.type_unit_group
= tu_group
;
5417 VEC_free (dwarf2_per_cu_ptr
, tu_group
->t
.tus
);
5422 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5423 Build partial symbol tables for the .debug_types comp-units. */
5426 build_type_psymtabs (struct objfile
*objfile
)
5428 if (! create_all_type_units (objfile
))
5431 build_type_unit_groups (build_type_psymtabs_reader
, NULL
);
5433 /* Now that all TUs have been processed we can fill in the dependencies. */
5434 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
5435 build_type_psymtab_dependencies
, NULL
);
5438 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
5441 psymtabs_addrmap_cleanup (void *o
)
5443 struct objfile
*objfile
= o
;
5445 objfile
->psymtabs_addrmap
= NULL
;
5448 /* Compute the 'user' field for each psymtab in OBJFILE. */
5451 set_partial_user (struct objfile
*objfile
)
5455 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5457 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5458 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5464 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
5466 /* Set the 'user' field only if it is not already set. */
5467 if (pst
->dependencies
[j
]->user
== NULL
)
5468 pst
->dependencies
[j
]->user
= pst
;
5473 /* Build the partial symbol table by doing a quick pass through the
5474 .debug_info and .debug_abbrev sections. */
5477 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
5479 struct cleanup
*back_to
, *addrmap_cleanup
;
5480 struct obstack temp_obstack
;
5483 if (dwarf2_read_debug
)
5485 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
5489 dwarf2_per_objfile
->reading_partial_symbols
= 1;
5491 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
5493 /* Any cached compilation units will be linked by the per-objfile
5494 read_in_chain. Make sure to free them when we're done. */
5495 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
5497 build_type_psymtabs (objfile
);
5499 create_all_comp_units (objfile
);
5501 /* Create a temporary address map on a temporary obstack. We later
5502 copy this to the final obstack. */
5503 obstack_init (&temp_obstack
);
5504 make_cleanup_obstack_free (&temp_obstack
);
5505 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
5506 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
5508 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5510 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5512 process_psymtab_comp_unit (per_cu
, 0);
5515 set_partial_user (objfile
);
5517 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
5518 &objfile
->objfile_obstack
);
5519 discard_cleanups (addrmap_cleanup
);
5521 do_cleanups (back_to
);
5523 if (dwarf2_read_debug
)
5524 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
5528 /* die_reader_func for load_partial_comp_unit. */
5531 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
5533 struct die_info
*comp_unit_die
,
5537 struct dwarf2_cu
*cu
= reader
->cu
;
5539 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
5541 /* Check if comp unit has_children.
5542 If so, read the rest of the partial symbols from this comp unit.
5543 If not, there's no more debug_info for this comp unit. */
5545 load_partial_dies (reader
, info_ptr
, 0);
5548 /* Load the partial DIEs for a secondary CU into memory.
5549 This is also used when rereading a primary CU with load_all_dies. */
5552 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
5554 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
5555 load_partial_comp_unit_reader
, NULL
);
5559 read_comp_units_from_section (struct objfile
*objfile
,
5560 struct dwarf2_section_info
*section
,
5561 unsigned int is_dwz
,
5564 struct dwarf2_per_cu_data
***all_comp_units
)
5567 bfd
*abfd
= section
->asection
->owner
;
5569 dwarf2_read_section (objfile
, section
);
5571 info_ptr
= section
->buffer
;
5573 while (info_ptr
< section
->buffer
+ section
->size
)
5575 unsigned int length
, initial_length_size
;
5576 struct dwarf2_per_cu_data
*this_cu
;
5579 offset
.sect_off
= info_ptr
- section
->buffer
;
5581 /* Read just enough information to find out where the next
5582 compilation unit is. */
5583 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
5585 /* Save the compilation unit for later lookup. */
5586 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
5587 sizeof (struct dwarf2_per_cu_data
));
5588 memset (this_cu
, 0, sizeof (*this_cu
));
5589 this_cu
->offset
= offset
;
5590 this_cu
->length
= length
+ initial_length_size
;
5591 this_cu
->is_dwz
= is_dwz
;
5592 this_cu
->objfile
= objfile
;
5593 this_cu
->info_or_types_section
= section
;
5595 if (*n_comp_units
== *n_allocated
)
5598 *all_comp_units
= xrealloc (*all_comp_units
,
5600 * sizeof (struct dwarf2_per_cu_data
*));
5602 (*all_comp_units
)[*n_comp_units
] = this_cu
;
5605 info_ptr
= info_ptr
+ this_cu
->length
;
5609 /* Create a list of all compilation units in OBJFILE.
5610 This is only done for -readnow and building partial symtabs. */
5613 create_all_comp_units (struct objfile
*objfile
)
5617 struct dwarf2_per_cu_data
**all_comp_units
;
5621 all_comp_units
= xmalloc (n_allocated
5622 * sizeof (struct dwarf2_per_cu_data
*));
5624 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
5625 &n_allocated
, &n_comp_units
, &all_comp_units
);
5627 if (bfd_get_section_by_name (objfile
->obfd
, ".gnu_debugaltlink") != NULL
)
5629 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
5631 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
5632 &n_allocated
, &n_comp_units
,
5636 dwarf2_per_objfile
->all_comp_units
5637 = obstack_alloc (&objfile
->objfile_obstack
,
5638 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
5639 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
5640 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
5641 xfree (all_comp_units
);
5642 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
5645 /* Process all loaded DIEs for compilation unit CU, starting at
5646 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
5647 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
5648 DW_AT_ranges). If NEED_PC is set, then this function will set
5649 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
5650 and record the covered ranges in the addrmap. */
5653 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
5654 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
5656 struct partial_die_info
*pdi
;
5658 /* Now, march along the PDI's, descending into ones which have
5659 interesting children but skipping the children of the other ones,
5660 until we reach the end of the compilation unit. */
5666 fixup_partial_die (pdi
, cu
);
5668 /* Anonymous namespaces or modules have no name but have interesting
5669 children, so we need to look at them. Ditto for anonymous
5672 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
5673 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
5674 || pdi
->tag
== DW_TAG_imported_unit
)
5678 case DW_TAG_subprogram
:
5679 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
5681 case DW_TAG_constant
:
5682 case DW_TAG_variable
:
5683 case DW_TAG_typedef
:
5684 case DW_TAG_union_type
:
5685 if (!pdi
->is_declaration
)
5687 add_partial_symbol (pdi
, cu
);
5690 case DW_TAG_class_type
:
5691 case DW_TAG_interface_type
:
5692 case DW_TAG_structure_type
:
5693 if (!pdi
->is_declaration
)
5695 add_partial_symbol (pdi
, cu
);
5698 case DW_TAG_enumeration_type
:
5699 if (!pdi
->is_declaration
)
5700 add_partial_enumeration (pdi
, cu
);
5702 case DW_TAG_base_type
:
5703 case DW_TAG_subrange_type
:
5704 /* File scope base type definitions are added to the partial
5706 add_partial_symbol (pdi
, cu
);
5708 case DW_TAG_namespace
:
5709 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
5712 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
5714 case DW_TAG_imported_unit
:
5716 struct dwarf2_per_cu_data
*per_cu
;
5718 /* For now we don't handle imported units in type units. */
5719 if (cu
->per_cu
->is_debug_types
)
5721 error (_("Dwarf Error: DW_TAG_imported_unit is not"
5722 " supported in type units [in module %s]"),
5726 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
5730 /* Go read the partial unit, if needed. */
5731 if (per_cu
->v
.psymtab
== NULL
)
5732 process_psymtab_comp_unit (per_cu
, 1);
5734 VEC_safe_push (dwarf2_per_cu_ptr
,
5735 cu
->per_cu
->s
.imported_symtabs
, per_cu
);
5743 /* If the die has a sibling, skip to the sibling. */
5745 pdi
= pdi
->die_sibling
;
5749 /* Functions used to compute the fully scoped name of a partial DIE.
5751 Normally, this is simple. For C++, the parent DIE's fully scoped
5752 name is concatenated with "::" and the partial DIE's name. For
5753 Java, the same thing occurs except that "." is used instead of "::".
5754 Enumerators are an exception; they use the scope of their parent
5755 enumeration type, i.e. the name of the enumeration type is not
5756 prepended to the enumerator.
5758 There are two complexities. One is DW_AT_specification; in this
5759 case "parent" means the parent of the target of the specification,
5760 instead of the direct parent of the DIE. The other is compilers
5761 which do not emit DW_TAG_namespace; in this case we try to guess
5762 the fully qualified name of structure types from their members'
5763 linkage names. This must be done using the DIE's children rather
5764 than the children of any DW_AT_specification target. We only need
5765 to do this for structures at the top level, i.e. if the target of
5766 any DW_AT_specification (if any; otherwise the DIE itself) does not
5769 /* Compute the scope prefix associated with PDI's parent, in
5770 compilation unit CU. The result will be allocated on CU's
5771 comp_unit_obstack, or a copy of the already allocated PDI->NAME
5772 field. NULL is returned if no prefix is necessary. */
5774 partial_die_parent_scope (struct partial_die_info
*pdi
,
5775 struct dwarf2_cu
*cu
)
5777 const char *grandparent_scope
;
5778 struct partial_die_info
*parent
, *real_pdi
;
5780 /* We need to look at our parent DIE; if we have a DW_AT_specification,
5781 then this means the parent of the specification DIE. */
5784 while (real_pdi
->has_specification
)
5785 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
5786 real_pdi
->spec_is_dwz
, cu
);
5788 parent
= real_pdi
->die_parent
;
5792 if (parent
->scope_set
)
5793 return parent
->scope
;
5795 fixup_partial_die (parent
, cu
);
5797 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
5799 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
5800 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
5801 Work around this problem here. */
5802 if (cu
->language
== language_cplus
5803 && parent
->tag
== DW_TAG_namespace
5804 && strcmp (parent
->name
, "::") == 0
5805 && grandparent_scope
== NULL
)
5807 parent
->scope
= NULL
;
5808 parent
->scope_set
= 1;
5812 if (pdi
->tag
== DW_TAG_enumerator
)
5813 /* Enumerators should not get the name of the enumeration as a prefix. */
5814 parent
->scope
= grandparent_scope
;
5815 else if (parent
->tag
== DW_TAG_namespace
5816 || parent
->tag
== DW_TAG_module
5817 || parent
->tag
== DW_TAG_structure_type
5818 || parent
->tag
== DW_TAG_class_type
5819 || parent
->tag
== DW_TAG_interface_type
5820 || parent
->tag
== DW_TAG_union_type
5821 || parent
->tag
== DW_TAG_enumeration_type
)
5823 if (grandparent_scope
== NULL
)
5824 parent
->scope
= parent
->name
;
5826 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
5828 parent
->name
, 0, cu
);
5832 /* FIXME drow/2004-04-01: What should we be doing with
5833 function-local names? For partial symbols, we should probably be
5835 complaint (&symfile_complaints
,
5836 _("unhandled containing DIE tag %d for DIE at %d"),
5837 parent
->tag
, pdi
->offset
.sect_off
);
5838 parent
->scope
= grandparent_scope
;
5841 parent
->scope_set
= 1;
5842 return parent
->scope
;
5845 /* Return the fully scoped name associated with PDI, from compilation unit
5846 CU. The result will be allocated with malloc. */
5849 partial_die_full_name (struct partial_die_info
*pdi
,
5850 struct dwarf2_cu
*cu
)
5852 const char *parent_scope
;
5854 /* If this is a template instantiation, we can not work out the
5855 template arguments from partial DIEs. So, unfortunately, we have
5856 to go through the full DIEs. At least any work we do building
5857 types here will be reused if full symbols are loaded later. */
5858 if (pdi
->has_template_arguments
)
5860 fixup_partial_die (pdi
, cu
);
5862 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
5864 struct die_info
*die
;
5865 struct attribute attr
;
5866 struct dwarf2_cu
*ref_cu
= cu
;
5868 /* DW_FORM_ref_addr is using section offset. */
5870 attr
.form
= DW_FORM_ref_addr
;
5871 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
5872 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
5874 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
5878 parent_scope
= partial_die_parent_scope (pdi
, cu
);
5879 if (parent_scope
== NULL
)
5882 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
5886 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
5888 struct objfile
*objfile
= cu
->objfile
;
5890 const char *actual_name
= NULL
;
5892 char *built_actual_name
;
5894 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5896 built_actual_name
= partial_die_full_name (pdi
, cu
);
5897 if (built_actual_name
!= NULL
)
5898 actual_name
= built_actual_name
;
5900 if (actual_name
== NULL
)
5901 actual_name
= pdi
->name
;
5905 case DW_TAG_subprogram
:
5906 if (pdi
->is_external
|| cu
->language
== language_ada
)
5908 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
5909 of the global scope. But in Ada, we want to be able to access
5910 nested procedures globally. So all Ada subprograms are stored
5911 in the global scope. */
5912 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5913 mst_text, objfile); */
5914 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5915 built_actual_name
!= NULL
,
5916 VAR_DOMAIN
, LOC_BLOCK
,
5917 &objfile
->global_psymbols
,
5918 0, pdi
->lowpc
+ baseaddr
,
5919 cu
->language
, objfile
);
5923 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5924 mst_file_text, objfile); */
5925 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5926 built_actual_name
!= NULL
,
5927 VAR_DOMAIN
, LOC_BLOCK
,
5928 &objfile
->static_psymbols
,
5929 0, pdi
->lowpc
+ baseaddr
,
5930 cu
->language
, objfile
);
5933 case DW_TAG_constant
:
5935 struct psymbol_allocation_list
*list
;
5937 if (pdi
->is_external
)
5938 list
= &objfile
->global_psymbols
;
5940 list
= &objfile
->static_psymbols
;
5941 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5942 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
5943 list
, 0, 0, cu
->language
, objfile
);
5946 case DW_TAG_variable
:
5948 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
5952 && !dwarf2_per_objfile
->has_section_at_zero
)
5954 /* A global or static variable may also have been stripped
5955 out by the linker if unused, in which case its address
5956 will be nullified; do not add such variables into partial
5957 symbol table then. */
5959 else if (pdi
->is_external
)
5962 Don't enter into the minimal symbol tables as there is
5963 a minimal symbol table entry from the ELF symbols already.
5964 Enter into partial symbol table if it has a location
5965 descriptor or a type.
5966 If the location descriptor is missing, new_symbol will create
5967 a LOC_UNRESOLVED symbol, the address of the variable will then
5968 be determined from the minimal symbol table whenever the variable
5970 The address for the partial symbol table entry is not
5971 used by GDB, but it comes in handy for debugging partial symbol
5974 if (pdi
->d
.locdesc
|| pdi
->has_type
)
5975 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5976 built_actual_name
!= NULL
,
5977 VAR_DOMAIN
, LOC_STATIC
,
5978 &objfile
->global_psymbols
,
5980 cu
->language
, objfile
);
5984 /* Static Variable. Skip symbols without location descriptors. */
5985 if (pdi
->d
.locdesc
== NULL
)
5987 xfree (built_actual_name
);
5990 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
5991 mst_file_data, objfile); */
5992 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5993 built_actual_name
!= NULL
,
5994 VAR_DOMAIN
, LOC_STATIC
,
5995 &objfile
->static_psymbols
,
5997 cu
->language
, objfile
);
6000 case DW_TAG_typedef
:
6001 case DW_TAG_base_type
:
6002 case DW_TAG_subrange_type
:
6003 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6004 built_actual_name
!= NULL
,
6005 VAR_DOMAIN
, LOC_TYPEDEF
,
6006 &objfile
->static_psymbols
,
6007 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6009 case DW_TAG_namespace
:
6010 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6011 built_actual_name
!= NULL
,
6012 VAR_DOMAIN
, LOC_TYPEDEF
,
6013 &objfile
->global_psymbols
,
6014 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6016 case DW_TAG_class_type
:
6017 case DW_TAG_interface_type
:
6018 case DW_TAG_structure_type
:
6019 case DW_TAG_union_type
:
6020 case DW_TAG_enumeration_type
:
6021 /* Skip external references. The DWARF standard says in the section
6022 about "Structure, Union, and Class Type Entries": "An incomplete
6023 structure, union or class type is represented by a structure,
6024 union or class entry that does not have a byte size attribute
6025 and that has a DW_AT_declaration attribute." */
6026 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
6028 xfree (built_actual_name
);
6032 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
6033 static vs. global. */
6034 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6035 built_actual_name
!= NULL
,
6036 STRUCT_DOMAIN
, LOC_TYPEDEF
,
6037 (cu
->language
== language_cplus
6038 || cu
->language
== language_java
)
6039 ? &objfile
->global_psymbols
6040 : &objfile
->static_psymbols
,
6041 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6044 case DW_TAG_enumerator
:
6045 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6046 built_actual_name
!= NULL
,
6047 VAR_DOMAIN
, LOC_CONST
,
6048 (cu
->language
== language_cplus
6049 || cu
->language
== language_java
)
6050 ? &objfile
->global_psymbols
6051 : &objfile
->static_psymbols
,
6052 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6058 xfree (built_actual_name
);
6061 /* Read a partial die corresponding to a namespace; also, add a symbol
6062 corresponding to that namespace to the symbol table. NAMESPACE is
6063 the name of the enclosing namespace. */
6066 add_partial_namespace (struct partial_die_info
*pdi
,
6067 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6068 int need_pc
, struct dwarf2_cu
*cu
)
6070 /* Add a symbol for the namespace. */
6072 add_partial_symbol (pdi
, cu
);
6074 /* Now scan partial symbols in that namespace. */
6076 if (pdi
->has_children
)
6077 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
6080 /* Read a partial die corresponding to a Fortran module. */
6083 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
6084 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
6086 /* Now scan partial symbols in that module. */
6088 if (pdi
->has_children
)
6089 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
6092 /* Read a partial die corresponding to a subprogram and create a partial
6093 symbol for that subprogram. When the CU language allows it, this
6094 routine also defines a partial symbol for each nested subprogram
6095 that this subprogram contains.
6097 DIE my also be a lexical block, in which case we simply search
6098 recursively for suprograms defined inside that lexical block.
6099 Again, this is only performed when the CU language allows this
6100 type of definitions. */
6103 add_partial_subprogram (struct partial_die_info
*pdi
,
6104 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6105 int need_pc
, struct dwarf2_cu
*cu
)
6107 if (pdi
->tag
== DW_TAG_subprogram
)
6109 if (pdi
->has_pc_info
)
6111 if (pdi
->lowpc
< *lowpc
)
6112 *lowpc
= pdi
->lowpc
;
6113 if (pdi
->highpc
> *highpc
)
6114 *highpc
= pdi
->highpc
;
6118 struct objfile
*objfile
= cu
->objfile
;
6120 baseaddr
= ANOFFSET (objfile
->section_offsets
,
6121 SECT_OFF_TEXT (objfile
));
6122 addrmap_set_empty (objfile
->psymtabs_addrmap
,
6123 pdi
->lowpc
+ baseaddr
,
6124 pdi
->highpc
- 1 + baseaddr
,
6125 cu
->per_cu
->v
.psymtab
);
6129 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
6131 if (!pdi
->is_declaration
)
6132 /* Ignore subprogram DIEs that do not have a name, they are
6133 illegal. Do not emit a complaint at this point, we will
6134 do so when we convert this psymtab into a symtab. */
6136 add_partial_symbol (pdi
, cu
);
6140 if (! pdi
->has_children
)
6143 if (cu
->language
== language_ada
)
6145 pdi
= pdi
->die_child
;
6148 fixup_partial_die (pdi
, cu
);
6149 if (pdi
->tag
== DW_TAG_subprogram
6150 || pdi
->tag
== DW_TAG_lexical_block
)
6151 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
6152 pdi
= pdi
->die_sibling
;
6157 /* Read a partial die corresponding to an enumeration type. */
6160 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
6161 struct dwarf2_cu
*cu
)
6163 struct partial_die_info
*pdi
;
6165 if (enum_pdi
->name
!= NULL
)
6166 add_partial_symbol (enum_pdi
, cu
);
6168 pdi
= enum_pdi
->die_child
;
6171 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
6172 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6174 add_partial_symbol (pdi
, cu
);
6175 pdi
= pdi
->die_sibling
;
6179 /* Return the initial uleb128 in the die at INFO_PTR. */
6182 peek_abbrev_code (bfd
*abfd
, gdb_byte
*info_ptr
)
6184 unsigned int bytes_read
;
6186 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6189 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
6190 Return the corresponding abbrev, or NULL if the number is zero (indicating
6191 an empty DIE). In either case *BYTES_READ will be set to the length of
6192 the initial number. */
6194 static struct abbrev_info
*
6195 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
6196 struct dwarf2_cu
*cu
)
6198 bfd
*abfd
= cu
->objfile
->obfd
;
6199 unsigned int abbrev_number
;
6200 struct abbrev_info
*abbrev
;
6202 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
6204 if (abbrev_number
== 0)
6207 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
6210 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
6211 abbrev_number
, bfd_get_filename (abfd
));
6217 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6218 Returns a pointer to the end of a series of DIEs, terminated by an empty
6219 DIE. Any children of the skipped DIEs will also be skipped. */
6222 skip_children (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
)
6224 struct dwarf2_cu
*cu
= reader
->cu
;
6225 struct abbrev_info
*abbrev
;
6226 unsigned int bytes_read
;
6230 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6232 return info_ptr
+ bytes_read
;
6234 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
6238 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6239 INFO_PTR should point just after the initial uleb128 of a DIE, and the
6240 abbrev corresponding to that skipped uleb128 should be passed in
6241 ABBREV. Returns a pointer to this DIE's sibling, skipping any
6245 skip_one_die (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
,
6246 struct abbrev_info
*abbrev
)
6248 unsigned int bytes_read
;
6249 struct attribute attr
;
6250 bfd
*abfd
= reader
->abfd
;
6251 struct dwarf2_cu
*cu
= reader
->cu
;
6252 gdb_byte
*buffer
= reader
->buffer
;
6253 const gdb_byte
*buffer_end
= reader
->buffer_end
;
6254 gdb_byte
*start_info_ptr
= info_ptr
;
6255 unsigned int form
, i
;
6257 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
6259 /* The only abbrev we care about is DW_AT_sibling. */
6260 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
6262 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
6263 if (attr
.form
== DW_FORM_ref_addr
)
6264 complaint (&symfile_complaints
,
6265 _("ignoring absolute DW_AT_sibling"));
6267 return buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
6270 /* If it isn't DW_AT_sibling, skip this attribute. */
6271 form
= abbrev
->attrs
[i
].form
;
6275 case DW_FORM_ref_addr
:
6276 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
6277 and later it is offset sized. */
6278 if (cu
->header
.version
== 2)
6279 info_ptr
+= cu
->header
.addr_size
;
6281 info_ptr
+= cu
->header
.offset_size
;
6283 case DW_FORM_GNU_ref_alt
:
6284 info_ptr
+= cu
->header
.offset_size
;
6287 info_ptr
+= cu
->header
.addr_size
;
6294 case DW_FORM_flag_present
:
6306 case DW_FORM_ref_sig8
:
6309 case DW_FORM_string
:
6310 read_direct_string (abfd
, info_ptr
, &bytes_read
);
6311 info_ptr
+= bytes_read
;
6313 case DW_FORM_sec_offset
:
6315 case DW_FORM_GNU_strp_alt
:
6316 info_ptr
+= cu
->header
.offset_size
;
6318 case DW_FORM_exprloc
:
6320 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6321 info_ptr
+= bytes_read
;
6323 case DW_FORM_block1
:
6324 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
6326 case DW_FORM_block2
:
6327 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
6329 case DW_FORM_block4
:
6330 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
6334 case DW_FORM_ref_udata
:
6335 case DW_FORM_GNU_addr_index
:
6336 case DW_FORM_GNU_str_index
:
6337 info_ptr
= (gdb_byte
*) safe_skip_leb128 (info_ptr
, buffer_end
);
6339 case DW_FORM_indirect
:
6340 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6341 info_ptr
+= bytes_read
;
6342 /* We need to continue parsing from here, so just go back to
6344 goto skip_attribute
;
6347 error (_("Dwarf Error: Cannot handle %s "
6348 "in DWARF reader [in module %s]"),
6349 dwarf_form_name (form
),
6350 bfd_get_filename (abfd
));
6354 if (abbrev
->has_children
)
6355 return skip_children (reader
, info_ptr
);
6360 /* Locate ORIG_PDI's sibling.
6361 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
6364 locate_pdi_sibling (const struct die_reader_specs
*reader
,
6365 struct partial_die_info
*orig_pdi
,
6368 /* Do we know the sibling already? */
6370 if (orig_pdi
->sibling
)
6371 return orig_pdi
->sibling
;
6373 /* Are there any children to deal with? */
6375 if (!orig_pdi
->has_children
)
6378 /* Skip the children the long way. */
6380 return skip_children (reader
, info_ptr
);
6383 /* Expand this partial symbol table into a full symbol table. SELF is
6387 dwarf2_read_symtab (struct partial_symtab
*self
,
6388 struct objfile
*objfile
)
6392 warning (_("bug: psymtab for %s is already read in."),
6399 printf_filtered (_("Reading in symbols for %s..."),
6401 gdb_flush (gdb_stdout
);
6404 /* Restore our global data. */
6405 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
6407 /* If this psymtab is constructed from a debug-only objfile, the
6408 has_section_at_zero flag will not necessarily be correct. We
6409 can get the correct value for this flag by looking at the data
6410 associated with the (presumably stripped) associated objfile. */
6411 if (objfile
->separate_debug_objfile_backlink
)
6413 struct dwarf2_per_objfile
*dpo_backlink
6414 = objfile_data (objfile
->separate_debug_objfile_backlink
,
6415 dwarf2_objfile_data_key
);
6417 dwarf2_per_objfile
->has_section_at_zero
6418 = dpo_backlink
->has_section_at_zero
;
6421 dwarf2_per_objfile
->reading_partial_symbols
= 0;
6423 psymtab_to_symtab_1 (self
);
6425 /* Finish up the debug error message. */
6427 printf_filtered (_("done.\n"));
6430 process_cu_includes ();
6433 /* Reading in full CUs. */
6435 /* Add PER_CU to the queue. */
6438 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
6439 enum language pretend_language
)
6441 struct dwarf2_queue_item
*item
;
6444 item
= xmalloc (sizeof (*item
));
6445 item
->per_cu
= per_cu
;
6446 item
->pretend_language
= pretend_language
;
6449 if (dwarf2_queue
== NULL
)
6450 dwarf2_queue
= item
;
6452 dwarf2_queue_tail
->next
= item
;
6454 dwarf2_queue_tail
= item
;
6457 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
6458 unit and add it to our queue.
6459 The result is non-zero if PER_CU was queued, otherwise the result is zero
6460 meaning either PER_CU is already queued or it is already loaded. */
6463 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
6464 struct dwarf2_per_cu_data
*per_cu
,
6465 enum language pretend_language
)
6467 /* We may arrive here during partial symbol reading, if we need full
6468 DIEs to process an unusual case (e.g. template arguments). Do
6469 not queue PER_CU, just tell our caller to load its DIEs. */
6470 if (dwarf2_per_objfile
->reading_partial_symbols
)
6472 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
6477 /* Mark the dependence relation so that we don't flush PER_CU
6479 dwarf2_add_dependence (this_cu
, per_cu
);
6481 /* If it's already on the queue, we have nothing to do. */
6485 /* If the compilation unit is already loaded, just mark it as
6487 if (per_cu
->cu
!= NULL
)
6489 per_cu
->cu
->last_used
= 0;
6493 /* Add it to the queue. */
6494 queue_comp_unit (per_cu
, pretend_language
);
6499 /* Process the queue. */
6502 process_queue (void)
6504 struct dwarf2_queue_item
*item
, *next_item
;
6506 if (dwarf2_read_debug
)
6508 fprintf_unfiltered (gdb_stdlog
,
6509 "Expanding one or more symtabs of objfile %s ...\n",
6510 dwarf2_per_objfile
->objfile
->name
);
6513 /* The queue starts out with one item, but following a DIE reference
6514 may load a new CU, adding it to the end of the queue. */
6515 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
6517 if (dwarf2_per_objfile
->using_index
6518 ? !item
->per_cu
->v
.quick
->symtab
6519 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
6521 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
6523 if (dwarf2_read_debug
)
6525 fprintf_unfiltered (gdb_stdlog
,
6526 "Expanding symtab of %s at offset 0x%x\n",
6527 per_cu
->is_debug_types
? "TU" : "CU",
6528 per_cu
->offset
.sect_off
);
6531 if (per_cu
->is_debug_types
)
6532 process_full_type_unit (per_cu
, item
->pretend_language
);
6534 process_full_comp_unit (per_cu
, item
->pretend_language
);
6536 if (dwarf2_read_debug
)
6538 fprintf_unfiltered (gdb_stdlog
,
6539 "Done expanding %s at offset 0x%x\n",
6540 per_cu
->is_debug_types
? "TU" : "CU",
6541 per_cu
->offset
.sect_off
);
6545 item
->per_cu
->queued
= 0;
6546 next_item
= item
->next
;
6550 dwarf2_queue_tail
= NULL
;
6552 if (dwarf2_read_debug
)
6554 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
6555 dwarf2_per_objfile
->objfile
->name
);
6559 /* Free all allocated queue entries. This function only releases anything if
6560 an error was thrown; if the queue was processed then it would have been
6561 freed as we went along. */
6564 dwarf2_release_queue (void *dummy
)
6566 struct dwarf2_queue_item
*item
, *last
;
6568 item
= dwarf2_queue
;
6571 /* Anything still marked queued is likely to be in an
6572 inconsistent state, so discard it. */
6573 if (item
->per_cu
->queued
)
6575 if (item
->per_cu
->cu
!= NULL
)
6576 free_one_cached_comp_unit (item
->per_cu
);
6577 item
->per_cu
->queued
= 0;
6585 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
6588 /* Read in full symbols for PST, and anything it depends on. */
6591 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
6593 struct dwarf2_per_cu_data
*per_cu
;
6599 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
6600 if (!pst
->dependencies
[i
]->readin
6601 && pst
->dependencies
[i
]->user
== NULL
)
6603 /* Inform about additional files that need to be read in. */
6606 /* FIXME: i18n: Need to make this a single string. */
6607 fputs_filtered (" ", gdb_stdout
);
6609 fputs_filtered ("and ", gdb_stdout
);
6611 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
6612 wrap_here (""); /* Flush output. */
6613 gdb_flush (gdb_stdout
);
6615 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
6618 per_cu
= pst
->read_symtab_private
;
6622 /* It's an include file, no symbols to read for it.
6623 Everything is in the parent symtab. */
6628 dw2_do_instantiate_symtab (per_cu
);
6631 /* Trivial hash function for die_info: the hash value of a DIE
6632 is its offset in .debug_info for this objfile. */
6635 die_hash (const void *item
)
6637 const struct die_info
*die
= item
;
6639 return die
->offset
.sect_off
;
6642 /* Trivial comparison function for die_info structures: two DIEs
6643 are equal if they have the same offset. */
6646 die_eq (const void *item_lhs
, const void *item_rhs
)
6648 const struct die_info
*die_lhs
= item_lhs
;
6649 const struct die_info
*die_rhs
= item_rhs
;
6651 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
6654 /* die_reader_func for load_full_comp_unit.
6655 This is identical to read_signatured_type_reader,
6656 but is kept separate for now. */
6659 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
6661 struct die_info
*comp_unit_die
,
6665 struct dwarf2_cu
*cu
= reader
->cu
;
6666 enum language
*language_ptr
= data
;
6668 gdb_assert (cu
->die_hash
== NULL
);
6670 htab_create_alloc_ex (cu
->header
.length
/ 12,
6674 &cu
->comp_unit_obstack
,
6675 hashtab_obstack_allocate
,
6676 dummy_obstack_deallocate
);
6679 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
6680 &info_ptr
, comp_unit_die
);
6681 cu
->dies
= comp_unit_die
;
6682 /* comp_unit_die is not stored in die_hash, no need. */
6684 /* We try not to read any attributes in this function, because not
6685 all CUs needed for references have been loaded yet, and symbol
6686 table processing isn't initialized. But we have to set the CU language,
6687 or we won't be able to build types correctly.
6688 Similarly, if we do not read the producer, we can not apply
6689 producer-specific interpretation. */
6690 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
6693 /* Load the DIEs associated with PER_CU into memory. */
6696 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6697 enum language pretend_language
)
6699 gdb_assert (! this_cu
->is_debug_types
);
6701 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6702 load_full_comp_unit_reader
, &pretend_language
);
6705 /* Add a DIE to the delayed physname list. */
6708 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
6709 const char *name
, struct die_info
*die
,
6710 struct dwarf2_cu
*cu
)
6712 struct delayed_method_info mi
;
6714 mi
.fnfield_index
= fnfield_index
;
6718 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
6721 /* A cleanup for freeing the delayed method list. */
6724 free_delayed_list (void *ptr
)
6726 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
6727 if (cu
->method_list
!= NULL
)
6729 VEC_free (delayed_method_info
, cu
->method_list
);
6730 cu
->method_list
= NULL
;
6734 /* Compute the physnames of any methods on the CU's method list.
6736 The computation of method physnames is delayed in order to avoid the
6737 (bad) condition that one of the method's formal parameters is of an as yet
6741 compute_delayed_physnames (struct dwarf2_cu
*cu
)
6744 struct delayed_method_info
*mi
;
6745 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
6747 const char *physname
;
6748 struct fn_fieldlist
*fn_flp
6749 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
6750 physname
= dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
6751 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
6755 /* Go objects should be embedded in a DW_TAG_module DIE,
6756 and it's not clear if/how imported objects will appear.
6757 To keep Go support simple until that's worked out,
6758 go back through what we've read and create something usable.
6759 We could do this while processing each DIE, and feels kinda cleaner,
6760 but that way is more invasive.
6761 This is to, for example, allow the user to type "p var" or "b main"
6762 without having to specify the package name, and allow lookups
6763 of module.object to work in contexts that use the expression
6767 fixup_go_packaging (struct dwarf2_cu
*cu
)
6769 char *package_name
= NULL
;
6770 struct pending
*list
;
6773 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
6775 for (i
= 0; i
< list
->nsyms
; ++i
)
6777 struct symbol
*sym
= list
->symbol
[i
];
6779 if (SYMBOL_LANGUAGE (sym
) == language_go
6780 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
6782 char *this_package_name
= go_symbol_package_name (sym
);
6784 if (this_package_name
== NULL
)
6786 if (package_name
== NULL
)
6787 package_name
= this_package_name
;
6790 if (strcmp (package_name
, this_package_name
) != 0)
6791 complaint (&symfile_complaints
,
6792 _("Symtab %s has objects from two different Go packages: %s and %s"),
6793 (SYMBOL_SYMTAB (sym
)
6794 ? SYMBOL_SYMTAB (sym
)->filename
6795 : cu
->objfile
->name
),
6796 this_package_name
, package_name
);
6797 xfree (this_package_name
);
6803 if (package_name
!= NULL
)
6805 struct objfile
*objfile
= cu
->objfile
;
6806 const char *saved_package_name
= obsavestring (package_name
,
6807 strlen (package_name
),
6808 &objfile
->objfile_obstack
);
6809 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
6810 saved_package_name
, objfile
);
6813 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
6815 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
6816 SYMBOL_SET_LANGUAGE (sym
, language_go
);
6817 SYMBOL_SET_NAMES (sym
, saved_package_name
,
6818 strlen (saved_package_name
), 0, objfile
);
6819 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
6820 e.g., "main" finds the "main" module and not C's main(). */
6821 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
6822 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
6823 SYMBOL_TYPE (sym
) = type
;
6825 add_symbol_to_list (sym
, &global_symbols
);
6827 xfree (package_name
);
6831 static void compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
);
6833 /* Return the symtab for PER_CU. This works properly regardless of
6834 whether we're using the index or psymtabs. */
6836 static struct symtab
*
6837 get_symtab (struct dwarf2_per_cu_data
*per_cu
)
6839 return (dwarf2_per_objfile
->using_index
6840 ? per_cu
->v
.quick
->symtab
6841 : per_cu
->v
.psymtab
->symtab
);
6844 /* A helper function for computing the list of all symbol tables
6845 included by PER_CU. */
6848 recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr
) **result
,
6849 htab_t all_children
,
6850 struct dwarf2_per_cu_data
*per_cu
)
6854 struct dwarf2_per_cu_data
*iter
;
6856 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
6859 /* This inclusion and its children have been processed. */
6864 /* Only add a CU if it has a symbol table. */
6865 if (get_symtab (per_cu
) != NULL
)
6866 VEC_safe_push (dwarf2_per_cu_ptr
, *result
, per_cu
);
6869 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
, ix
, iter
);
6871 recursively_compute_inclusions (result
, all_children
, iter
);
6874 /* Compute the symtab 'includes' fields for the symtab related to
6878 compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
6880 gdb_assert (! per_cu
->is_debug_types
);
6882 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
))
6885 struct dwarf2_per_cu_data
*iter
;
6886 VEC (dwarf2_per_cu_ptr
) *result_children
= NULL
;
6887 htab_t all_children
;
6888 struct symtab
*symtab
= get_symtab (per_cu
);
6890 /* If we don't have a symtab, we can just skip this case. */
6894 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
6895 NULL
, xcalloc
, xfree
);
6898 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
,
6901 recursively_compute_inclusions (&result_children
, all_children
, iter
);
6903 /* Now we have a transitive closure of all the included CUs, so
6904 we can convert it to a list of symtabs. */
6905 len
= VEC_length (dwarf2_per_cu_ptr
, result_children
);
6907 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
6908 (len
+ 1) * sizeof (struct symtab
*));
6910 VEC_iterate (dwarf2_per_cu_ptr
, result_children
, ix
, iter
);
6912 symtab
->includes
[ix
] = get_symtab (iter
);
6913 symtab
->includes
[len
] = NULL
;
6915 VEC_free (dwarf2_per_cu_ptr
, result_children
);
6916 htab_delete (all_children
);
6920 /* Compute the 'includes' field for the symtabs of all the CUs we just
6924 process_cu_includes (void)
6927 struct dwarf2_per_cu_data
*iter
;
6930 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
6934 if (! iter
->is_debug_types
)
6935 compute_symtab_includes (iter
);
6938 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
6941 /* Generate full symbol information for PER_CU, whose DIEs have
6942 already been loaded into memory. */
6945 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
6946 enum language pretend_language
)
6948 struct dwarf2_cu
*cu
= per_cu
->cu
;
6949 struct objfile
*objfile
= per_cu
->objfile
;
6950 CORE_ADDR lowpc
, highpc
;
6951 struct symtab
*symtab
;
6952 struct cleanup
*back_to
, *delayed_list_cleanup
;
6954 struct block
*static_block
;
6956 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6959 back_to
= make_cleanup (really_free_pendings
, NULL
);
6960 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
6962 cu
->list_in_scope
= &file_symbols
;
6964 cu
->language
= pretend_language
;
6965 cu
->language_defn
= language_def (cu
->language
);
6967 /* Do line number decoding in read_file_scope () */
6968 process_die (cu
->dies
, cu
);
6970 /* For now fudge the Go package. */
6971 if (cu
->language
== language_go
)
6972 fixup_go_packaging (cu
);
6974 /* Now that we have processed all the DIEs in the CU, all the types
6975 should be complete, and it should now be safe to compute all of the
6977 compute_delayed_physnames (cu
);
6978 do_cleanups (delayed_list_cleanup
);
6980 /* Some compilers don't define a DW_AT_high_pc attribute for the
6981 compilation unit. If the DW_AT_high_pc is missing, synthesize
6982 it, by scanning the DIE's below the compilation unit. */
6983 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
6986 = end_symtab_get_static_block (highpc
+ baseaddr
, objfile
, 0,
6987 per_cu
->s
.imported_symtabs
!= NULL
);
6989 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
6990 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
6991 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
6992 addrmap to help ensure it has an accurate map of pc values belonging to
6994 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
6996 symtab
= end_symtab_from_static_block (static_block
, objfile
,
6997 SECT_OFF_TEXT (objfile
), 0);
7001 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
7003 /* Set symtab language to language from DW_AT_language. If the
7004 compilation is from a C file generated by language preprocessors, do
7005 not set the language if it was already deduced by start_subfile. */
7006 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
7007 symtab
->language
= cu
->language
;
7009 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
7010 produce DW_AT_location with location lists but it can be possibly
7011 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
7012 there were bugs in prologue debug info, fixed later in GCC-4.5
7013 by "unwind info for epilogues" patch (which is not directly related).
7015 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
7016 needed, it would be wrong due to missing DW_AT_producer there.
7018 Still one can confuse GDB by using non-standard GCC compilation
7019 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
7021 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
7022 symtab
->locations_valid
= 1;
7024 if (gcc_4_minor
>= 5)
7025 symtab
->epilogue_unwind_valid
= 1;
7027 symtab
->call_site_htab
= cu
->call_site_htab
;
7030 if (dwarf2_per_objfile
->using_index
)
7031 per_cu
->v
.quick
->symtab
= symtab
;
7034 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7035 pst
->symtab
= symtab
;
7039 /* Push it for inclusion processing later. */
7040 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
7042 do_cleanups (back_to
);
7045 /* Generate full symbol information for type unit PER_CU, whose DIEs have
7046 already been loaded into memory. */
7049 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
7050 enum language pretend_language
)
7052 struct dwarf2_cu
*cu
= per_cu
->cu
;
7053 struct objfile
*objfile
= per_cu
->objfile
;
7054 struct symtab
*symtab
;
7055 struct cleanup
*back_to
, *delayed_list_cleanup
;
7058 back_to
= make_cleanup (really_free_pendings
, NULL
);
7059 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
7061 cu
->list_in_scope
= &file_symbols
;
7063 cu
->language
= pretend_language
;
7064 cu
->language_defn
= language_def (cu
->language
);
7066 /* The symbol tables are set up in read_type_unit_scope. */
7067 process_die (cu
->dies
, cu
);
7069 /* For now fudge the Go package. */
7070 if (cu
->language
== language_go
)
7071 fixup_go_packaging (cu
);
7073 /* Now that we have processed all the DIEs in the CU, all the types
7074 should be complete, and it should now be safe to compute all of the
7076 compute_delayed_physnames (cu
);
7077 do_cleanups (delayed_list_cleanup
);
7079 /* TUs share symbol tables.
7080 If this is the first TU to use this symtab, complete the construction
7081 of it with end_expandable_symtab. Otherwise, complete the addition of
7082 this TU's symbols to the existing symtab. */
7083 if (per_cu
->s
.type_unit_group
->primary_symtab
== NULL
)
7085 symtab
= end_expandable_symtab (0, objfile
, SECT_OFF_TEXT (objfile
));
7086 per_cu
->s
.type_unit_group
->primary_symtab
= symtab
;
7090 /* Set symtab language to language from DW_AT_language. If the
7091 compilation is from a C file generated by language preprocessors,
7092 do not set the language if it was already deduced by
7094 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
7095 symtab
->language
= cu
->language
;
7100 augment_type_symtab (objfile
,
7101 per_cu
->s
.type_unit_group
->primary_symtab
);
7102 symtab
= per_cu
->s
.type_unit_group
->primary_symtab
;
7105 if (dwarf2_per_objfile
->using_index
)
7106 per_cu
->v
.quick
->symtab
= symtab
;
7109 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7110 pst
->symtab
= symtab
;
7114 do_cleanups (back_to
);
7117 /* Process an imported unit DIE. */
7120 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7122 struct attribute
*attr
;
7124 /* For now we don't handle imported units in type units. */
7125 if (cu
->per_cu
->is_debug_types
)
7127 error (_("Dwarf Error: DW_TAG_imported_unit is not"
7128 " supported in type units [in module %s]"),
7132 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7135 struct dwarf2_per_cu_data
*per_cu
;
7136 struct symtab
*imported_symtab
;
7140 offset
= dwarf2_get_ref_die_offset (attr
);
7141 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
7142 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
7144 /* Queue the unit, if needed. */
7145 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
7146 load_full_comp_unit (per_cu
, cu
->language
);
7148 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
,
7153 /* Process a die and its children. */
7156 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7160 case DW_TAG_padding
:
7162 case DW_TAG_compile_unit
:
7163 case DW_TAG_partial_unit
:
7164 read_file_scope (die
, cu
);
7166 case DW_TAG_type_unit
:
7167 read_type_unit_scope (die
, cu
);
7169 case DW_TAG_subprogram
:
7170 case DW_TAG_inlined_subroutine
:
7171 read_func_scope (die
, cu
);
7173 case DW_TAG_lexical_block
:
7174 case DW_TAG_try_block
:
7175 case DW_TAG_catch_block
:
7176 read_lexical_block_scope (die
, cu
);
7178 case DW_TAG_GNU_call_site
:
7179 read_call_site_scope (die
, cu
);
7181 case DW_TAG_class_type
:
7182 case DW_TAG_interface_type
:
7183 case DW_TAG_structure_type
:
7184 case DW_TAG_union_type
:
7185 process_structure_scope (die
, cu
);
7187 case DW_TAG_enumeration_type
:
7188 process_enumeration_scope (die
, cu
);
7191 /* These dies have a type, but processing them does not create
7192 a symbol or recurse to process the children. Therefore we can
7193 read them on-demand through read_type_die. */
7194 case DW_TAG_subroutine_type
:
7195 case DW_TAG_set_type
:
7196 case DW_TAG_array_type
:
7197 case DW_TAG_pointer_type
:
7198 case DW_TAG_ptr_to_member_type
:
7199 case DW_TAG_reference_type
:
7200 case DW_TAG_string_type
:
7203 case DW_TAG_base_type
:
7204 case DW_TAG_subrange_type
:
7205 case DW_TAG_typedef
:
7206 /* Add a typedef symbol for the type definition, if it has a
7208 new_symbol (die
, read_type_die (die
, cu
), cu
);
7210 case DW_TAG_common_block
:
7211 read_common_block (die
, cu
);
7213 case DW_TAG_common_inclusion
:
7215 case DW_TAG_namespace
:
7216 processing_has_namespace_info
= 1;
7217 read_namespace (die
, cu
);
7220 processing_has_namespace_info
= 1;
7221 read_module (die
, cu
);
7223 case DW_TAG_imported_declaration
:
7224 case DW_TAG_imported_module
:
7225 processing_has_namespace_info
= 1;
7226 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
7227 || cu
->language
!= language_fortran
))
7228 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
7229 dwarf_tag_name (die
->tag
));
7230 read_import_statement (die
, cu
);
7233 case DW_TAG_imported_unit
:
7234 process_imported_unit_die (die
, cu
);
7238 new_symbol (die
, NULL
, cu
);
7243 /* A helper function for dwarf2_compute_name which determines whether DIE
7244 needs to have the name of the scope prepended to the name listed in the
7248 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
7250 struct attribute
*attr
;
7254 case DW_TAG_namespace
:
7255 case DW_TAG_typedef
:
7256 case DW_TAG_class_type
:
7257 case DW_TAG_interface_type
:
7258 case DW_TAG_structure_type
:
7259 case DW_TAG_union_type
:
7260 case DW_TAG_enumeration_type
:
7261 case DW_TAG_enumerator
:
7262 case DW_TAG_subprogram
:
7266 case DW_TAG_variable
:
7267 case DW_TAG_constant
:
7268 /* We only need to prefix "globally" visible variables. These include
7269 any variable marked with DW_AT_external or any variable that
7270 lives in a namespace. [Variables in anonymous namespaces
7271 require prefixing, but they are not DW_AT_external.] */
7273 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
7275 struct dwarf2_cu
*spec_cu
= cu
;
7277 return die_needs_namespace (die_specification (die
, &spec_cu
),
7281 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
7282 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
7283 && die
->parent
->tag
!= DW_TAG_module
)
7285 /* A variable in a lexical block of some kind does not need a
7286 namespace, even though in C++ such variables may be external
7287 and have a mangled name. */
7288 if (die
->parent
->tag
== DW_TAG_lexical_block
7289 || die
->parent
->tag
== DW_TAG_try_block
7290 || die
->parent
->tag
== DW_TAG_catch_block
7291 || die
->parent
->tag
== DW_TAG_subprogram
)
7300 /* Retrieve the last character from a mem_file. */
7303 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
7305 char *last_char_p
= (char *) object
;
7308 *last_char_p
= buffer
[length
- 1];
7311 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
7312 compute the physname for the object, which include a method's:
7313 - formal parameters (C++/Java),
7314 - receiver type (Go),
7315 - return type (Java).
7317 The term "physname" is a bit confusing.
7318 For C++, for example, it is the demangled name.
7319 For Go, for example, it's the mangled name.
7321 For Ada, return the DIE's linkage name rather than the fully qualified
7322 name. PHYSNAME is ignored..
7324 The result is allocated on the objfile_obstack and canonicalized. */
7327 dwarf2_compute_name (const char *name
,
7328 struct die_info
*die
, struct dwarf2_cu
*cu
,
7331 struct objfile
*objfile
= cu
->objfile
;
7334 name
= dwarf2_name (die
, cu
);
7336 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
7337 compute it by typename_concat inside GDB. */
7338 if (cu
->language
== language_ada
7339 || (cu
->language
== language_fortran
&& physname
))
7341 /* For Ada unit, we prefer the linkage name over the name, as
7342 the former contains the exported name, which the user expects
7343 to be able to reference. Ideally, we want the user to be able
7344 to reference this entity using either natural or linkage name,
7345 but we haven't started looking at this enhancement yet. */
7346 struct attribute
*attr
;
7348 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7350 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7351 if (attr
&& DW_STRING (attr
))
7352 return DW_STRING (attr
);
7355 /* These are the only languages we know how to qualify names in. */
7357 && (cu
->language
== language_cplus
|| cu
->language
== language_java
7358 || cu
->language
== language_fortran
))
7360 if (die_needs_namespace (die
, cu
))
7364 struct ui_file
*buf
;
7366 prefix
= determine_prefix (die
, cu
);
7367 buf
= mem_fileopen ();
7368 if (*prefix
!= '\0')
7370 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
7373 fputs_unfiltered (prefixed_name
, buf
);
7374 xfree (prefixed_name
);
7377 fputs_unfiltered (name
, buf
);
7379 /* Template parameters may be specified in the DIE's DW_AT_name, or
7380 as children with DW_TAG_template_type_param or
7381 DW_TAG_value_type_param. If the latter, add them to the name
7382 here. If the name already has template parameters, then
7383 skip this step; some versions of GCC emit both, and
7384 it is more efficient to use the pre-computed name.
7386 Something to keep in mind about this process: it is very
7387 unlikely, or in some cases downright impossible, to produce
7388 something that will match the mangled name of a function.
7389 If the definition of the function has the same debug info,
7390 we should be able to match up with it anyway. But fallbacks
7391 using the minimal symbol, for instance to find a method
7392 implemented in a stripped copy of libstdc++, will not work.
7393 If we do not have debug info for the definition, we will have to
7394 match them up some other way.
7396 When we do name matching there is a related problem with function
7397 templates; two instantiated function templates are allowed to
7398 differ only by their return types, which we do not add here. */
7400 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
7402 struct attribute
*attr
;
7403 struct die_info
*child
;
7406 die
->building_fullname
= 1;
7408 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
7413 struct dwarf2_locexpr_baton
*baton
;
7416 if (child
->tag
!= DW_TAG_template_type_param
7417 && child
->tag
!= DW_TAG_template_value_param
)
7422 fputs_unfiltered ("<", buf
);
7426 fputs_unfiltered (", ", buf
);
7428 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
7431 complaint (&symfile_complaints
,
7432 _("template parameter missing DW_AT_type"));
7433 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
7436 type
= die_type (child
, cu
);
7438 if (child
->tag
== DW_TAG_template_type_param
)
7440 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
7444 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
7447 complaint (&symfile_complaints
,
7448 _("template parameter missing "
7449 "DW_AT_const_value"));
7450 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
7454 dwarf2_const_value_attr (attr
, type
, name
,
7455 &cu
->comp_unit_obstack
, cu
,
7456 &value
, &bytes
, &baton
);
7458 if (TYPE_NOSIGN (type
))
7459 /* GDB prints characters as NUMBER 'CHAR'. If that's
7460 changed, this can use value_print instead. */
7461 c_printchar (value
, type
, buf
);
7464 struct value_print_options opts
;
7467 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
7471 else if (bytes
!= NULL
)
7473 v
= allocate_value (type
);
7474 memcpy (value_contents_writeable (v
), bytes
,
7475 TYPE_LENGTH (type
));
7478 v
= value_from_longest (type
, value
);
7480 /* Specify decimal so that we do not depend on
7482 get_formatted_print_options (&opts
, 'd');
7484 value_print (v
, buf
, &opts
);
7490 die
->building_fullname
= 0;
7494 /* Close the argument list, with a space if necessary
7495 (nested templates). */
7496 char last_char
= '\0';
7497 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
7498 if (last_char
== '>')
7499 fputs_unfiltered (" >", buf
);
7501 fputs_unfiltered (">", buf
);
7505 /* For Java and C++ methods, append formal parameter type
7506 information, if PHYSNAME. */
7508 if (physname
&& die
->tag
== DW_TAG_subprogram
7509 && (cu
->language
== language_cplus
7510 || cu
->language
== language_java
))
7512 struct type
*type
= read_type_die (die
, cu
);
7514 c_type_print_args (type
, buf
, 1, cu
->language
,
7515 &type_print_raw_options
);
7517 if (cu
->language
== language_java
)
7519 /* For java, we must append the return type to method
7521 if (die
->tag
== DW_TAG_subprogram
)
7522 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
7523 0, 0, &type_print_raw_options
);
7525 else if (cu
->language
== language_cplus
)
7527 /* Assume that an artificial first parameter is
7528 "this", but do not crash if it is not. RealView
7529 marks unnamed (and thus unused) parameters as
7530 artificial; there is no way to differentiate
7532 if (TYPE_NFIELDS (type
) > 0
7533 && TYPE_FIELD_ARTIFICIAL (type
, 0)
7534 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
7535 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
7537 fputs_unfiltered (" const", buf
);
7541 name
= ui_file_obsavestring (buf
, &objfile
->objfile_obstack
,
7543 ui_file_delete (buf
);
7545 if (cu
->language
== language_cplus
)
7548 = dwarf2_canonicalize_name (name
, cu
,
7549 &objfile
->objfile_obstack
);
7560 /* Return the fully qualified name of DIE, based on its DW_AT_name.
7561 If scope qualifiers are appropriate they will be added. The result
7562 will be allocated on the objfile_obstack, or NULL if the DIE does
7563 not have a name. NAME may either be from a previous call to
7564 dwarf2_name or NULL.
7566 The output string will be canonicalized (if C++/Java). */
7569 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7571 return dwarf2_compute_name (name
, die
, cu
, 0);
7574 /* Construct a physname for the given DIE in CU. NAME may either be
7575 from a previous call to dwarf2_name or NULL. The result will be
7576 allocated on the objfile_objstack or NULL if the DIE does not have a
7579 The output string will be canonicalized (if C++/Java). */
7582 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7584 struct objfile
*objfile
= cu
->objfile
;
7585 struct attribute
*attr
;
7586 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
7587 struct cleanup
*back_to
;
7590 /* In this case dwarf2_compute_name is just a shortcut not building anything
7592 if (!die_needs_namespace (die
, cu
))
7593 return dwarf2_compute_name (name
, die
, cu
, 1);
7595 back_to
= make_cleanup (null_cleanup
, NULL
);
7597 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7599 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7601 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
7603 if (attr
&& DW_STRING (attr
))
7607 mangled
= DW_STRING (attr
);
7609 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
7610 type. It is easier for GDB users to search for such functions as
7611 `name(params)' than `long name(params)'. In such case the minimal
7612 symbol names do not match the full symbol names but for template
7613 functions there is never a need to look up their definition from their
7614 declaration so the only disadvantage remains the minimal symbol
7615 variant `long name(params)' does not have the proper inferior type.
7618 if (cu
->language
== language_go
)
7620 /* This is a lie, but we already lie to the caller new_symbol_full.
7621 new_symbol_full assumes we return the mangled name.
7622 This just undoes that lie until things are cleaned up. */
7627 demangled
= cplus_demangle (mangled
,
7628 (DMGL_PARAMS
| DMGL_ANSI
7629 | (cu
->language
== language_java
7630 ? DMGL_JAVA
| DMGL_RET_POSTFIX
7635 make_cleanup (xfree
, demangled
);
7645 if (canon
== NULL
|| check_physname
)
7647 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
7649 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
7651 /* It may not mean a bug in GDB. The compiler could also
7652 compute DW_AT_linkage_name incorrectly. But in such case
7653 GDB would need to be bug-to-bug compatible. */
7655 complaint (&symfile_complaints
,
7656 _("Computed physname <%s> does not match demangled <%s> "
7657 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
7658 physname
, canon
, mangled
, die
->offset
.sect_off
, objfile
->name
);
7660 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
7661 is available here - over computed PHYSNAME. It is safer
7662 against both buggy GDB and buggy compilers. */
7676 retval
= obsavestring (retval
, strlen (retval
),
7677 &objfile
->objfile_obstack
);
7679 do_cleanups (back_to
);
7683 /* Read the import statement specified by the given die and record it. */
7686 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
7688 struct objfile
*objfile
= cu
->objfile
;
7689 struct attribute
*import_attr
;
7690 struct die_info
*imported_die
, *child_die
;
7691 struct dwarf2_cu
*imported_cu
;
7692 const char *imported_name
;
7693 const char *imported_name_prefix
;
7694 const char *canonical_name
;
7695 const char *import_alias
;
7696 const char *imported_declaration
= NULL
;
7697 const char *import_prefix
;
7698 VEC (const_char_ptr
) *excludes
= NULL
;
7699 struct cleanup
*cleanups
;
7703 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7704 if (import_attr
== NULL
)
7706 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7707 dwarf_tag_name (die
->tag
));
7712 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
7713 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7714 if (imported_name
== NULL
)
7716 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
7718 The import in the following code:
7732 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
7733 <52> DW_AT_decl_file : 1
7734 <53> DW_AT_decl_line : 6
7735 <54> DW_AT_import : <0x75>
7736 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
7738 <5b> DW_AT_decl_file : 1
7739 <5c> DW_AT_decl_line : 2
7740 <5d> DW_AT_type : <0x6e>
7742 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
7743 <76> DW_AT_byte_size : 4
7744 <77> DW_AT_encoding : 5 (signed)
7746 imports the wrong die ( 0x75 instead of 0x58 ).
7747 This case will be ignored until the gcc bug is fixed. */
7751 /* Figure out the local name after import. */
7752 import_alias
= dwarf2_name (die
, cu
);
7754 /* Figure out where the statement is being imported to. */
7755 import_prefix
= determine_prefix (die
, cu
);
7757 /* Figure out what the scope of the imported die is and prepend it
7758 to the name of the imported die. */
7759 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
7761 if (imported_die
->tag
!= DW_TAG_namespace
7762 && imported_die
->tag
!= DW_TAG_module
)
7764 imported_declaration
= imported_name
;
7765 canonical_name
= imported_name_prefix
;
7767 else if (strlen (imported_name_prefix
) > 0)
7769 temp
= alloca (strlen (imported_name_prefix
)
7770 + 2 + strlen (imported_name
) + 1);
7771 strcpy (temp
, imported_name_prefix
);
7772 strcat (temp
, "::");
7773 strcat (temp
, imported_name
);
7774 canonical_name
= temp
;
7777 canonical_name
= imported_name
;
7779 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
7781 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
7782 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
7783 child_die
= sibling_die (child_die
))
7785 /* DWARF-4: A Fortran use statement with a “rename list” may be
7786 represented by an imported module entry with an import attribute
7787 referring to the module and owned entries corresponding to those
7788 entities that are renamed as part of being imported. */
7790 if (child_die
->tag
!= DW_TAG_imported_declaration
)
7792 complaint (&symfile_complaints
,
7793 _("child DW_TAG_imported_declaration expected "
7794 "- DIE at 0x%x [in module %s]"),
7795 child_die
->offset
.sect_off
, objfile
->name
);
7799 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
7800 if (import_attr
== NULL
)
7802 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7803 dwarf_tag_name (child_die
->tag
));
7808 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
7810 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7811 if (imported_name
== NULL
)
7813 complaint (&symfile_complaints
,
7814 _("child DW_TAG_imported_declaration has unknown "
7815 "imported name - DIE at 0x%x [in module %s]"),
7816 child_die
->offset
.sect_off
, objfile
->name
);
7820 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
7822 process_die (child_die
, cu
);
7825 cp_add_using_directive (import_prefix
,
7828 imported_declaration
,
7830 &objfile
->objfile_obstack
);
7832 do_cleanups (cleanups
);
7835 /* Cleanup function for handle_DW_AT_stmt_list. */
7838 free_cu_line_header (void *arg
)
7840 struct dwarf2_cu
*cu
= arg
;
7842 free_line_header (cu
->line_header
);
7843 cu
->line_header
= NULL
;
7846 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
7847 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
7848 this, it was first present in GCC release 4.3.0. */
7851 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
7853 if (!cu
->checked_producer
)
7854 check_producer (cu
);
7856 return cu
->producer_is_gcc_lt_4_3
;
7860 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
7861 const char **name
, const char **comp_dir
)
7863 struct attribute
*attr
;
7868 /* Find the filename. Do not use dwarf2_name here, since the filename
7869 is not a source language identifier. */
7870 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7873 *name
= DW_STRING (attr
);
7876 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
7878 *comp_dir
= DW_STRING (attr
);
7879 else if (producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
7880 && IS_ABSOLUTE_PATH (*name
))
7882 char *d
= ldirname (*name
);
7886 make_cleanup (xfree
, d
);
7888 if (*comp_dir
!= NULL
)
7890 /* Irix 6.2 native cc prepends <machine>.: to the compilation
7891 directory, get rid of it. */
7892 char *cp
= strchr (*comp_dir
, ':');
7894 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
7899 *name
= "<unknown>";
7902 /* Handle DW_AT_stmt_list for a compilation unit.
7903 DIE is the DW_TAG_compile_unit die for CU.
7904 COMP_DIR is the compilation directory.
7905 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
7908 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
7909 const char *comp_dir
)
7911 struct attribute
*attr
;
7913 gdb_assert (! cu
->per_cu
->is_debug_types
);
7915 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
7918 unsigned int line_offset
= DW_UNSND (attr
);
7919 struct line_header
*line_header
7920 = dwarf_decode_line_header (line_offset
, cu
);
7924 cu
->line_header
= line_header
;
7925 make_cleanup (free_cu_line_header
, cu
);
7926 dwarf_decode_lines (line_header
, comp_dir
, cu
, NULL
, 1);
7931 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
7934 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7936 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7937 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
7938 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
7939 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
7940 struct attribute
*attr
;
7941 const char *name
= NULL
;
7942 const char *comp_dir
= NULL
;
7943 struct die_info
*child_die
;
7944 bfd
*abfd
= objfile
->obfd
;
7947 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7949 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
7951 /* If we didn't find a lowpc, set it to highpc to avoid complaints
7952 from finish_block. */
7953 if (lowpc
== ((CORE_ADDR
) -1))
7958 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
7960 prepare_one_comp_unit (cu
, die
, cu
->language
);
7962 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
7963 standardised yet. As a workaround for the language detection we fall
7964 back to the DW_AT_producer string. */
7965 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
7966 cu
->language
= language_opencl
;
7968 /* Similar hack for Go. */
7969 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
7970 set_cu_language (DW_LANG_Go
, cu
);
7972 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
7974 /* Decode line number information if present. We do this before
7975 processing child DIEs, so that the line header table is available
7976 for DW_AT_decl_file. */
7977 handle_DW_AT_stmt_list (die
, cu
, comp_dir
);
7979 /* Process all dies in compilation unit. */
7980 if (die
->child
!= NULL
)
7982 child_die
= die
->child
;
7983 while (child_die
&& child_die
->tag
)
7985 process_die (child_die
, cu
);
7986 child_die
= sibling_die (child_die
);
7990 /* Decode macro information, if present. Dwarf 2 macro information
7991 refers to information in the line number info statement program
7992 header, so we can only read it if we've read the header
7994 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
7995 if (attr
&& cu
->line_header
)
7997 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
7998 complaint (&symfile_complaints
,
7999 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
8001 dwarf_decode_macros (cu
, DW_UNSND (attr
), comp_dir
, 1);
8005 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
8006 if (attr
&& cu
->line_header
)
8008 unsigned int macro_offset
= DW_UNSND (attr
);
8010 dwarf_decode_macros (cu
, macro_offset
, comp_dir
, 0);
8014 do_cleanups (back_to
);
8017 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
8018 Create the set of symtabs used by this TU, or if this TU is sharing
8019 symtabs with another TU and the symtabs have already been created
8020 then restore those symtabs in the line header.
8021 We don't need the pc/line-number mapping for type units. */
8024 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
8026 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8027 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8028 struct type_unit_group
*tu_group
;
8030 struct line_header
*lh
;
8031 struct attribute
*attr
;
8032 unsigned int i
, line_offset
;
8034 gdb_assert (per_cu
->is_debug_types
);
8036 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
8038 /* If we're using .gdb_index (includes -readnow) then
8039 per_cu->s.type_unit_group may not have been set up yet. */
8040 if (per_cu
->s
.type_unit_group
== NULL
)
8041 per_cu
->s
.type_unit_group
= get_type_unit_group (cu
, attr
);
8042 tu_group
= per_cu
->s
.type_unit_group
;
8044 /* If we've already processed this stmt_list there's no real need to
8045 do it again, we could fake it and just recreate the part we need
8046 (file name,index -> symtab mapping). If data shows this optimization
8047 is useful we can do it then. */
8048 first_time
= tu_group
->primary_symtab
== NULL
;
8050 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
8055 line_offset
= DW_UNSND (attr
);
8056 lh
= dwarf_decode_line_header (line_offset
, cu
);
8061 dwarf2_start_symtab (cu
, "", NULL
, 0);
8064 gdb_assert (tu_group
->symtabs
== NULL
);
8067 /* Note: The primary symtab will get allocated at the end. */
8071 cu
->line_header
= lh
;
8072 make_cleanup (free_cu_line_header
, cu
);
8076 dwarf2_start_symtab (cu
, "", NULL
, 0);
8078 tu_group
->num_symtabs
= lh
->num_file_names
;
8079 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
8081 for (i
= 0; i
< lh
->num_file_names
; ++i
)
8084 struct file_entry
*fe
= &lh
->file_names
[i
];
8087 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8088 dwarf2_start_subfile (fe
->name
, dir
, NULL
);
8090 /* Note: We don't have to watch for the main subfile here, type units
8091 don't have DW_AT_name. */
8093 if (current_subfile
->symtab
== NULL
)
8095 /* NOTE: start_subfile will recognize when it's been passed
8096 a file it has already seen. So we can't assume there's a
8097 simple mapping from lh->file_names to subfiles,
8098 lh->file_names may contain dups. */
8099 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8103 fe
->symtab
= current_subfile
->symtab
;
8104 tu_group
->symtabs
[i
] = fe
->symtab
;
8111 for (i
= 0; i
< lh
->num_file_names
; ++i
)
8113 struct file_entry
*fe
= &lh
->file_names
[i
];
8115 fe
->symtab
= tu_group
->symtabs
[i
];
8119 /* The main symtab is allocated last. Type units don't have DW_AT_name
8120 so they don't have a "real" (so to speak) symtab anyway.
8121 There is later code that will assign the main symtab to all symbols
8122 that don't have one. We need to handle the case of a symbol with a
8123 missing symtab (DW_AT_decl_file) anyway. */
8126 /* Process DW_TAG_type_unit.
8127 For TUs we want to skip the first top level sibling if it's not the
8128 actual type being defined by this TU. In this case the first top
8129 level sibling is there to provide context only. */
8132 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8134 struct die_info
*child_die
;
8136 prepare_one_comp_unit (cu
, die
, language_minimal
);
8138 /* Initialize (or reinitialize) the machinery for building symtabs.
8139 We do this before processing child DIEs, so that the line header table
8140 is available for DW_AT_decl_file. */
8141 setup_type_unit_groups (die
, cu
);
8143 if (die
->child
!= NULL
)
8145 child_die
= die
->child
;
8146 while (child_die
&& child_die
->tag
)
8148 process_die (child_die
, cu
);
8149 child_die
= sibling_die (child_die
);
8156 http://gcc.gnu.org/wiki/DebugFission
8157 http://gcc.gnu.org/wiki/DebugFissionDWP
8159 To simplify handling of both DWO files ("object" files with the DWARF info)
8160 and DWP files (a file with the DWOs packaged up into one file), we treat
8161 DWP files as having a collection of virtual DWO files. */
8164 hash_dwo_file (const void *item
)
8166 const struct dwo_file
*dwo_file
= item
;
8168 return htab_hash_string (dwo_file
->name
);
8172 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
8174 const struct dwo_file
*lhs
= item_lhs
;
8175 const struct dwo_file
*rhs
= item_rhs
;
8177 return strcmp (lhs
->name
, rhs
->name
) == 0;
8180 /* Allocate a hash table for DWO files. */
8183 allocate_dwo_file_hash_table (void)
8185 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8187 return htab_create_alloc_ex (41,
8191 &objfile
->objfile_obstack
,
8192 hashtab_obstack_allocate
,
8193 dummy_obstack_deallocate
);
8196 /* Lookup DWO file DWO_NAME. */
8199 lookup_dwo_file_slot (const char *dwo_name
)
8201 struct dwo_file find_entry
;
8204 if (dwarf2_per_objfile
->dwo_files
== NULL
)
8205 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
8207 memset (&find_entry
, 0, sizeof (find_entry
));
8208 find_entry
.name
= dwo_name
;
8209 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
8215 hash_dwo_unit (const void *item
)
8217 const struct dwo_unit
*dwo_unit
= item
;
8219 /* This drops the top 32 bits of the id, but is ok for a hash. */
8220 return dwo_unit
->signature
;
8224 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
8226 const struct dwo_unit
*lhs
= item_lhs
;
8227 const struct dwo_unit
*rhs
= item_rhs
;
8229 /* The signature is assumed to be unique within the DWO file.
8230 So while object file CU dwo_id's always have the value zero,
8231 that's OK, assuming each object file DWO file has only one CU,
8232 and that's the rule for now. */
8233 return lhs
->signature
== rhs
->signature
;
8236 /* Allocate a hash table for DWO CUs,TUs.
8237 There is one of these tables for each of CUs,TUs for each DWO file. */
8240 allocate_dwo_unit_table (struct objfile
*objfile
)
8242 /* Start out with a pretty small number.
8243 Generally DWO files contain only one CU and maybe some TUs. */
8244 return htab_create_alloc_ex (3,
8248 &objfile
->objfile_obstack
,
8249 hashtab_obstack_allocate
,
8250 dummy_obstack_deallocate
);
8253 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
8255 struct create_dwo_info_table_data
8257 struct dwo_file
*dwo_file
;
8261 /* die_reader_func for create_dwo_debug_info_hash_table. */
8264 create_dwo_debug_info_hash_table_reader (const struct die_reader_specs
*reader
,
8266 struct die_info
*comp_unit_die
,
8270 struct dwarf2_cu
*cu
= reader
->cu
;
8271 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8272 sect_offset offset
= cu
->per_cu
->offset
;
8273 struct dwarf2_section_info
*section
= cu
->per_cu
->info_or_types_section
;
8274 struct create_dwo_info_table_data
*data
= datap
;
8275 struct dwo_file
*dwo_file
= data
->dwo_file
;
8276 htab_t cu_htab
= data
->cu_htab
;
8278 struct attribute
*attr
;
8279 struct dwo_unit
*dwo_unit
;
8281 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
8284 error (_("Dwarf Error: debug entry at offset 0x%x is missing"
8285 " its dwo_id [in module %s]"),
8286 offset
.sect_off
, dwo_file
->name
);
8290 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
8291 dwo_unit
->dwo_file
= dwo_file
;
8292 dwo_unit
->signature
= DW_UNSND (attr
);
8293 dwo_unit
->info_or_types_section
= section
;
8294 dwo_unit
->offset
= offset
;
8295 dwo_unit
->length
= cu
->per_cu
->length
;
8297 slot
= htab_find_slot (cu_htab
, dwo_unit
, INSERT
);
8298 gdb_assert (slot
!= NULL
);
8301 const struct dwo_unit
*dup_dwo_unit
= *slot
;
8303 complaint (&symfile_complaints
,
8304 _("debug entry at offset 0x%x is duplicate to the entry at"
8305 " offset 0x%x, dwo_id 0x%s [in module %s]"),
8306 offset
.sect_off
, dup_dwo_unit
->offset
.sect_off
,
8307 phex (dwo_unit
->signature
, sizeof (dwo_unit
->signature
)),
8313 if (dwarf2_read_debug
)
8314 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id 0x%s\n",
8316 phex (dwo_unit
->signature
,
8317 sizeof (dwo_unit
->signature
)));
8320 /* Create a hash table to map DWO IDs to their CU entry in
8321 .debug_info.dwo in DWO_FILE.
8322 Note: This function processes DWO files only, not DWP files. */
8325 create_dwo_debug_info_hash_table (struct dwo_file
*dwo_file
)
8327 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8328 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
8331 gdb_byte
*info_ptr
, *end_ptr
;
8332 struct create_dwo_info_table_data create_dwo_info_table_data
;
8334 dwarf2_read_section (objfile
, section
);
8335 info_ptr
= section
->buffer
;
8337 if (info_ptr
== NULL
)
8340 /* We can't set abfd until now because the section may be empty or
8341 not present, in which case section->asection will be NULL. */
8342 abfd
= section
->asection
->owner
;
8344 if (dwarf2_read_debug
)
8345 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_info.dwo for %s:\n",
8346 bfd_get_filename (abfd
));
8348 cu_htab
= allocate_dwo_unit_table (objfile
);
8350 create_dwo_info_table_data
.dwo_file
= dwo_file
;
8351 create_dwo_info_table_data
.cu_htab
= cu_htab
;
8353 end_ptr
= info_ptr
+ section
->size
;
8354 while (info_ptr
< end_ptr
)
8356 struct dwarf2_per_cu_data per_cu
;
8358 memset (&per_cu
, 0, sizeof (per_cu
));
8359 per_cu
.objfile
= objfile
;
8360 per_cu
.is_debug_types
= 0;
8361 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
8362 per_cu
.info_or_types_section
= section
;
8364 init_cutu_and_read_dies_no_follow (&per_cu
,
8365 &dwo_file
->sections
.abbrev
,
8367 create_dwo_debug_info_hash_table_reader
,
8368 &create_dwo_info_table_data
);
8370 info_ptr
+= per_cu
.length
;
8376 /* DWP file .debug_{cu,tu}_index section format:
8377 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
8379 Both index sections have the same format, and serve to map a 64-bit
8380 signature to a set of section numbers. Each section begins with a header,
8381 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
8382 indexes, and a pool of 32-bit section numbers. The index sections will be
8383 aligned at 8-byte boundaries in the file.
8385 The index section header contains two unsigned 32-bit values (using the
8386 byte order of the application binary):
8388 N, the number of compilation units or type units in the index
8389 M, the number of slots in the hash table
8391 (We assume that N and M will not exceed 2^32 - 1.)
8393 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
8395 The hash table begins at offset 8 in the section, and consists of an array
8396 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
8397 order of the application binary). Unused slots in the hash table are 0.
8398 (We rely on the extreme unlikeliness of a signature being exactly 0.)
8400 The parallel table begins immediately after the hash table
8401 (at offset 8 + 8 * M from the beginning of the section), and consists of an
8402 array of 32-bit indexes (using the byte order of the application binary),
8403 corresponding 1-1 with slots in the hash table. Each entry in the parallel
8404 table contains a 32-bit index into the pool of section numbers. For unused
8405 hash table slots, the corresponding entry in the parallel table will be 0.
8407 Given a 64-bit compilation unit signature or a type signature S, an entry
8408 in the hash table is located as follows:
8410 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
8411 the low-order k bits all set to 1.
8413 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
8415 3) If the hash table entry at index H matches the signature, use that
8416 entry. If the hash table entry at index H is unused (all zeroes),
8417 terminate the search: the signature is not present in the table.
8419 4) Let H = (H + H') modulo M. Repeat at Step 3.
8421 Because M > N and H' and M are relatively prime, the search is guaranteed
8422 to stop at an unused slot or find the match.
8424 The pool of section numbers begins immediately following the hash table
8425 (at offset 8 + 12 * M from the beginning of the section). The pool of
8426 section numbers consists of an array of 32-bit words (using the byte order
8427 of the application binary). Each item in the array is indexed starting
8428 from 0. The hash table entry provides the index of the first section
8429 number in the set. Additional section numbers in the set follow, and the
8430 set is terminated by a 0 entry (section number 0 is not used in ELF).
8432 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
8433 section must be the first entry in the set, and the .debug_abbrev.dwo must
8434 be the second entry. Other members of the set may follow in any order. */
8436 /* Create a hash table to map DWO IDs to their CU/TU entry in
8437 .debug_{info,types}.dwo in DWP_FILE.
8438 Returns NULL if there isn't one.
8439 Note: This function processes DWP files only, not DWO files. */
8441 static struct dwp_hash_table
*
8442 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
8444 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8445 bfd
*dbfd
= dwp_file
->dbfd
;
8446 char *index_ptr
, *index_end
;
8447 struct dwarf2_section_info
*index
;
8448 uint32_t version
, nr_units
, nr_slots
;
8449 struct dwp_hash_table
*htab
;
8452 index
= &dwp_file
->sections
.tu_index
;
8454 index
= &dwp_file
->sections
.cu_index
;
8456 if (dwarf2_section_empty_p (index
))
8458 dwarf2_read_section (objfile
, index
);
8460 index_ptr
= index
->buffer
;
8461 index_end
= index_ptr
+ index
->size
;
8463 version
= read_4_bytes (dbfd
, index_ptr
);
8464 index_ptr
+= 8; /* Skip the unused word. */
8465 nr_units
= read_4_bytes (dbfd
, index_ptr
);
8467 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
8472 error (_("Dwarf Error: unsupported DWP file version (%u)"
8474 version
, dwp_file
->name
);
8476 if (nr_slots
!= (nr_slots
& -nr_slots
))
8478 error (_("Dwarf Error: number of slots in DWP hash table (%u)"
8479 " is not power of 2 [in module %s]"),
8480 nr_slots
, dwp_file
->name
);
8483 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
8484 htab
->nr_units
= nr_units
;
8485 htab
->nr_slots
= nr_slots
;
8486 htab
->hash_table
= index_ptr
;
8487 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
8488 htab
->section_pool
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
8493 /* Update SECTIONS with the data from SECTP.
8495 This function is like the other "locate" section routines that are
8496 passed to bfd_map_over_sections, but in this context the sections to
8497 read comes from the DWP hash table, not the full ELF section table.
8499 The result is non-zero for success, or zero if an error was found. */
8502 locate_virtual_dwo_sections (asection
*sectp
,
8503 struct virtual_dwo_sections
*sections
)
8505 const struct dwop_section_names
*names
= &dwop_section_names
;
8507 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
8509 /* There can be only one. */
8510 if (sections
->abbrev
.asection
!= NULL
)
8512 sections
->abbrev
.asection
= sectp
;
8513 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
8515 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
8516 || section_is_p (sectp
->name
, &names
->types_dwo
))
8518 /* There can be only one. */
8519 if (sections
->info_or_types
.asection
!= NULL
)
8521 sections
->info_or_types
.asection
= sectp
;
8522 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
8524 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
8526 /* There can be only one. */
8527 if (sections
->line
.asection
!= NULL
)
8529 sections
->line
.asection
= sectp
;
8530 sections
->line
.size
= bfd_get_section_size (sectp
);
8532 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
8534 /* There can be only one. */
8535 if (sections
->loc
.asection
!= NULL
)
8537 sections
->loc
.asection
= sectp
;
8538 sections
->loc
.size
= bfd_get_section_size (sectp
);
8540 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
8542 /* There can be only one. */
8543 if (sections
->macinfo
.asection
!= NULL
)
8545 sections
->macinfo
.asection
= sectp
;
8546 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
8548 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
8550 /* There can be only one. */
8551 if (sections
->macro
.asection
!= NULL
)
8553 sections
->macro
.asection
= sectp
;
8554 sections
->macro
.size
= bfd_get_section_size (sectp
);
8556 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
8558 /* There can be only one. */
8559 if (sections
->str_offsets
.asection
!= NULL
)
8561 sections
->str_offsets
.asection
= sectp
;
8562 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
8566 /* No other kind of section is valid. */
8573 /* Create a dwo_unit object for the DWO with signature SIGNATURE.
8574 HTAB is the hash table from the DWP file.
8575 SECTION_INDEX is the index of the DWO in HTAB. */
8577 static struct dwo_unit
*
8578 create_dwo_in_dwp (struct dwp_file
*dwp_file
,
8579 const struct dwp_hash_table
*htab
,
8580 uint32_t section_index
,
8581 ULONGEST signature
, int is_debug_types
)
8583 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8584 bfd
*dbfd
= dwp_file
->dbfd
;
8585 const char *kind
= is_debug_types
? "TU" : "CU";
8586 struct dwo_file
*dwo_file
;
8587 struct dwo_unit
*dwo_unit
;
8588 struct virtual_dwo_sections sections
;
8589 void **dwo_file_slot
;
8590 char *virtual_dwo_name
;
8591 struct dwarf2_section_info
*cutu
;
8592 struct cleanup
*cleanups
;
8595 if (dwarf2_read_debug
)
8597 fprintf_unfiltered (gdb_stdlog
, "Reading %s %u/0x%s in DWP file: %s\n",
8599 section_index
, phex (signature
, sizeof (signature
)),
8603 /* Fetch the sections of this DWO.
8604 Put a limit on the number of sections we look for so that bad data
8605 doesn't cause us to loop forever. */
8607 #define MAX_NR_DWO_SECTIONS \
8608 (1 /* .debug_info or .debug_types */ \
8609 + 1 /* .debug_abbrev */ \
8610 + 1 /* .debug_line */ \
8611 + 1 /* .debug_loc */ \
8612 + 1 /* .debug_str_offsets */ \
8613 + 1 /* .debug_macro */ \
8614 + 1 /* .debug_macinfo */ \
8615 + 1 /* trailing zero */)
8617 memset (§ions
, 0, sizeof (sections
));
8618 cleanups
= make_cleanup (null_cleanup
, 0);
8620 for (i
= 0; i
< MAX_NR_DWO_SECTIONS
; ++i
)
8623 uint32_t section_nr
=
8626 + (section_index
+ i
) * sizeof (uint32_t));
8628 if (section_nr
== 0)
8630 if (section_nr
>= dwp_file
->num_sections
)
8632 error (_("Dwarf Error: bad DWP hash table, section number too large"
8637 sectp
= dwp_file
->elf_sections
[section_nr
];
8638 if (! locate_virtual_dwo_sections (sectp
, §ions
))
8640 error (_("Dwarf Error: bad DWP hash table, invalid section found"
8647 || sections
.info_or_types
.asection
== NULL
8648 || sections
.abbrev
.asection
== NULL
)
8650 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
8654 if (i
== MAX_NR_DWO_SECTIONS
)
8656 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
8661 /* It's easier for the rest of the code if we fake a struct dwo_file and
8662 have dwo_unit "live" in that. At least for now.
8664 The DWP file can be made up of a random collection of CUs and TUs.
8665 However, for each CU + set of TUs that came from the same original DWO
8666 file, we want to combine them back into a virtual DWO file to save space
8667 (fewer struct dwo_file objects to allocated). Remember that for really
8668 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
8671 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
8672 sections
.abbrev
.asection
? sections
.abbrev
.asection
->id
: 0,
8673 sections
.line
.asection
? sections
.line
.asection
->id
: 0,
8674 sections
.loc
.asection
? sections
.loc
.asection
->id
: 0,
8675 (sections
.str_offsets
.asection
8676 ? sections
.str_offsets
.asection
->id
8678 make_cleanup (xfree
, virtual_dwo_name
);
8679 /* Can we use an existing virtual DWO file? */
8680 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
);
8681 /* Create one if necessary. */
8682 if (*dwo_file_slot
== NULL
)
8684 if (dwarf2_read_debug
)
8686 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
8689 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
8690 dwo_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
8692 strlen (virtual_dwo_name
));
8693 dwo_file
->sections
.abbrev
= sections
.abbrev
;
8694 dwo_file
->sections
.line
= sections
.line
;
8695 dwo_file
->sections
.loc
= sections
.loc
;
8696 dwo_file
->sections
.macinfo
= sections
.macinfo
;
8697 dwo_file
->sections
.macro
= sections
.macro
;
8698 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
8699 /* The "str" section is global to the entire DWP file. */
8700 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
8701 /* The info or types section is assigned later to dwo_unit,
8702 there's no need to record it in dwo_file.
8703 Also, we can't simply record type sections in dwo_file because
8704 we record a pointer into the vector in dwo_unit. As we collect more
8705 types we'll grow the vector and eventually have to reallocate space
8706 for it, invalidating all the pointers into the current copy. */
8707 *dwo_file_slot
= dwo_file
;
8711 if (dwarf2_read_debug
)
8713 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
8716 dwo_file
= *dwo_file_slot
;
8718 do_cleanups (cleanups
);
8720 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
8721 dwo_unit
->dwo_file
= dwo_file
;
8722 dwo_unit
->signature
= signature
;
8723 dwo_unit
->info_or_types_section
=
8724 obstack_alloc (&objfile
->objfile_obstack
,
8725 sizeof (struct dwarf2_section_info
));
8726 *dwo_unit
->info_or_types_section
= sections
.info_or_types
;
8727 /* offset, length, type_offset_in_tu are set later. */
8732 /* Lookup the DWO with SIGNATURE in DWP_FILE. */
8734 static struct dwo_unit
*
8735 lookup_dwo_in_dwp (struct dwp_file
*dwp_file
,
8736 const struct dwp_hash_table
*htab
,
8737 ULONGEST signature
, int is_debug_types
)
8739 bfd
*dbfd
= dwp_file
->dbfd
;
8740 uint32_t mask
= htab
->nr_slots
- 1;
8741 uint32_t hash
= signature
& mask
;
8742 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
8745 struct dwo_unit find_dwo_cu
, *dwo_cu
;
8747 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
8748 find_dwo_cu
.signature
= signature
;
8749 slot
= htab_find_slot (dwp_file
->loaded_cutus
, &find_dwo_cu
, INSERT
);
8754 /* Use a for loop so that we don't loop forever on bad debug info. */
8755 for (i
= 0; i
< htab
->nr_slots
; ++i
)
8757 ULONGEST signature_in_table
;
8759 signature_in_table
=
8760 read_8_bytes (dbfd
, htab
->hash_table
+ hash
* sizeof (uint64_t));
8761 if (signature_in_table
== signature
)
8763 uint32_t section_index
=
8764 read_4_bytes (dbfd
, htab
->unit_table
+ hash
* sizeof (uint32_t));
8766 *slot
= create_dwo_in_dwp (dwp_file
, htab
, section_index
,
8767 signature
, is_debug_types
);
8770 if (signature_in_table
== 0)
8772 hash
= (hash
+ hash2
) & mask
;
8775 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
8780 /* Subroutine of open_dwop_file to simplify it.
8781 Open the file specified by FILE_NAME and hand it off to BFD for
8782 preliminary analysis. Return a newly initialized bfd *, which
8783 includes a canonicalized copy of FILE_NAME.
8784 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
8785 In case of trouble, return NULL.
8786 NOTE: This function is derived from symfile_bfd_open. */
8789 try_open_dwop_file (const char *file_name
, int is_dwp
)
8793 char *absolute_name
;
8795 flags
= OPF_TRY_CWD_FIRST
;
8797 flags
|= OPF_SEARCH_IN_PATH
;
8798 desc
= openp (debug_file_directory
, flags
, file_name
,
8799 O_RDONLY
| O_BINARY
, &absolute_name
);
8803 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
8806 xfree (absolute_name
);
8809 xfree (absolute_name
);
8810 bfd_set_cacheable (sym_bfd
, 1);
8812 if (!bfd_check_format (sym_bfd
, bfd_object
))
8814 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
8821 /* Try to open DWO/DWP file FILE_NAME.
8822 COMP_DIR is the DW_AT_comp_dir attribute.
8823 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
8824 The result is the bfd handle of the file.
8825 If there is a problem finding or opening the file, return NULL.
8826 Upon success, the canonicalized path of the file is stored in the bfd,
8827 same as symfile_bfd_open. */
8830 open_dwop_file (const char *file_name
, const char *comp_dir
, int is_dwp
)
8834 if (IS_ABSOLUTE_PATH (file_name
))
8835 return try_open_dwop_file (file_name
, is_dwp
);
8837 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
8839 if (comp_dir
!= NULL
)
8841 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
8843 /* NOTE: If comp_dir is a relative path, this will also try the
8844 search path, which seems useful. */
8845 abfd
= try_open_dwop_file (path_to_try
, is_dwp
);
8846 xfree (path_to_try
);
8851 /* That didn't work, try debug-file-directory, which, despite its name,
8852 is a list of paths. */
8854 if (*debug_file_directory
== '\0')
8857 return try_open_dwop_file (file_name
, is_dwp
);
8860 /* This function is mapped across the sections and remembers the offset and
8861 size of each of the DWO debugging sections we are interested in. */
8864 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
8866 struct dwo_sections
*dwo_sections
= dwo_sections_ptr
;
8867 const struct dwop_section_names
*names
= &dwop_section_names
;
8869 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
8871 dwo_sections
->abbrev
.asection
= sectp
;
8872 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
8874 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
8876 dwo_sections
->info
.asection
= sectp
;
8877 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
8879 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
8881 dwo_sections
->line
.asection
= sectp
;
8882 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
8884 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
8886 dwo_sections
->loc
.asection
= sectp
;
8887 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
8889 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
8891 dwo_sections
->macinfo
.asection
= sectp
;
8892 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
8894 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
8896 dwo_sections
->macro
.asection
= sectp
;
8897 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
8899 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
8901 dwo_sections
->str
.asection
= sectp
;
8902 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
8904 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
8906 dwo_sections
->str_offsets
.asection
= sectp
;
8907 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
8909 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
8911 struct dwarf2_section_info type_section
;
8913 memset (&type_section
, 0, sizeof (type_section
));
8914 type_section
.asection
= sectp
;
8915 type_section
.size
= bfd_get_section_size (sectp
);
8916 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
8921 /* Initialize the use of the DWO file specified by DWO_NAME.
8922 The result is NULL if DWO_NAME can't be found. */
8924 static struct dwo_file
*
8925 open_and_init_dwo_file (const char *dwo_name
, const char *comp_dir
)
8927 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8928 struct dwo_file
*dwo_file
;
8930 struct cleanup
*cleanups
;
8932 dbfd
= open_dwop_file (dwo_name
, comp_dir
, 0);
8935 if (dwarf2_read_debug
)
8936 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
8939 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
8940 dwo_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
8941 dwo_name
, strlen (dwo_name
));
8942 dwo_file
->dbfd
= dbfd
;
8944 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
8946 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
8948 dwo_file
->cus
= create_dwo_debug_info_hash_table (dwo_file
);
8950 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
8951 dwo_file
->sections
.types
);
8953 discard_cleanups (cleanups
);
8955 if (dwarf2_read_debug
)
8956 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
8961 /* This function is mapped across the sections and remembers the offset and
8962 size of each of the DWP debugging sections we are interested in. */
8965 dwarf2_locate_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
8967 struct dwp_file
*dwp_file
= dwp_file_ptr
;
8968 const struct dwop_section_names
*names
= &dwop_section_names
;
8969 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
8971 /* Record the ELF section number for later lookup: this is what the
8972 .debug_cu_index,.debug_tu_index tables use. */
8973 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
8974 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
8976 /* Look for specific sections that we need. */
8977 if (section_is_p (sectp
->name
, &names
->str_dwo
))
8979 dwp_file
->sections
.str
.asection
= sectp
;
8980 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
8982 else if (section_is_p (sectp
->name
, &names
->cu_index
))
8984 dwp_file
->sections
.cu_index
.asection
= sectp
;
8985 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
8987 else if (section_is_p (sectp
->name
, &names
->tu_index
))
8989 dwp_file
->sections
.tu_index
.asection
= sectp
;
8990 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
8994 /* Hash function for dwp_file loaded CUs/TUs. */
8997 hash_dwp_loaded_cutus (const void *item
)
8999 const struct dwo_unit
*dwo_unit
= item
;
9001 /* This drops the top 32 bits of the signature, but is ok for a hash. */
9002 return dwo_unit
->signature
;
9005 /* Equality function for dwp_file loaded CUs/TUs. */
9008 eq_dwp_loaded_cutus (const void *a
, const void *b
)
9010 const struct dwo_unit
*dua
= a
;
9011 const struct dwo_unit
*dub
= b
;
9013 return dua
->signature
== dub
->signature
;
9016 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
9019 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
9021 return htab_create_alloc_ex (3,
9022 hash_dwp_loaded_cutus
,
9023 eq_dwp_loaded_cutus
,
9025 &objfile
->objfile_obstack
,
9026 hashtab_obstack_allocate
,
9027 dummy_obstack_deallocate
);
9030 /* Initialize the use of the DWP file for the current objfile.
9031 By convention the name of the DWP file is ${objfile}.dwp.
9032 The result is NULL if it can't be found. */
9034 static struct dwp_file
*
9035 open_and_init_dwp_file (const char *comp_dir
)
9037 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9038 struct dwp_file
*dwp_file
;
9041 struct cleanup
*cleanups
;
9043 dwp_name
= xstrprintf ("%s.dwp", dwarf2_per_objfile
->objfile
->name
);
9044 cleanups
= make_cleanup (xfree
, dwp_name
);
9046 dbfd
= open_dwop_file (dwp_name
, comp_dir
, 1);
9049 if (dwarf2_read_debug
)
9050 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
9051 do_cleanups (cleanups
);
9054 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
9055 dwp_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
9056 dwp_name
, strlen (dwp_name
));
9057 dwp_file
->dbfd
= dbfd
;
9058 do_cleanups (cleanups
);
9060 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwp_file
);
9062 /* +1: section 0 is unused */
9063 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
9064 dwp_file
->elf_sections
=
9065 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
9066 dwp_file
->num_sections
, asection
*);
9068 bfd_map_over_sections (dbfd
, dwarf2_locate_dwp_sections
, dwp_file
);
9070 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
9072 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
9074 dwp_file
->loaded_cutus
= allocate_dwp_loaded_cutus_table (objfile
);
9076 discard_cleanups (cleanups
);
9078 if (dwarf2_read_debug
)
9080 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
9081 fprintf_unfiltered (gdb_stdlog
,
9082 " %u CUs, %u TUs\n",
9083 dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0,
9084 dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0);
9090 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
9091 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
9092 or in the DWP file for the objfile, referenced by THIS_UNIT.
9093 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
9094 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
9096 This is called, for example, when wanting to read a variable with a
9097 complex location. Therefore we don't want to do file i/o for every call.
9098 Therefore we don't want to look for a DWO file on every call.
9099 Therefore we first see if we've already seen SIGNATURE in a DWP file,
9100 then we check if we've already seen DWO_NAME, and only THEN do we check
9103 The result is a pointer to the dwo_unit object or NULL if we didn't find it
9104 (dwo_id mismatch or couldn't find the DWO/DWP file). */
9106 static struct dwo_unit
*
9107 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
9108 const char *dwo_name
, const char *comp_dir
,
9109 ULONGEST signature
, int is_debug_types
)
9111 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9112 const char *kind
= is_debug_types
? "TU" : "CU";
9113 void **dwo_file_slot
;
9114 struct dwo_file
*dwo_file
;
9115 struct dwp_file
*dwp_file
;
9117 /* Have we already read SIGNATURE from a DWP file? */
9119 if (! dwarf2_per_objfile
->dwp_checked
)
9121 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file (comp_dir
);
9122 dwarf2_per_objfile
->dwp_checked
= 1;
9124 dwp_file
= dwarf2_per_objfile
->dwp_file
;
9126 if (dwp_file
!= NULL
)
9128 const struct dwp_hash_table
*dwp_htab
=
9129 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
9131 if (dwp_htab
!= NULL
)
9133 struct dwo_unit
*dwo_cutu
=
9134 lookup_dwo_in_dwp (dwp_file
, dwp_htab
, signature
, is_debug_types
);
9136 if (dwo_cutu
!= NULL
)
9138 if (dwarf2_read_debug
)
9140 fprintf_unfiltered (gdb_stdlog
,
9141 "Virtual DWO %s %s found: @%s\n",
9142 kind
, hex_string (signature
),
9143 host_address_to_string (dwo_cutu
));
9150 /* Have we already seen DWO_NAME? */
9152 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
);
9153 if (*dwo_file_slot
== NULL
)
9155 /* Read in the file and build a table of the DWOs it contains. */
9156 *dwo_file_slot
= open_and_init_dwo_file (dwo_name
, comp_dir
);
9158 /* NOTE: This will be NULL if unable to open the file. */
9159 dwo_file
= *dwo_file_slot
;
9161 if (dwo_file
!= NULL
)
9163 htab_t htab
= is_debug_types
? dwo_file
->tus
: dwo_file
->cus
;
9167 struct dwo_unit find_dwo_cutu
, *dwo_cutu
;
9169 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
9170 find_dwo_cutu
.signature
= signature
;
9171 dwo_cutu
= htab_find (htab
, &find_dwo_cutu
);
9173 if (dwo_cutu
!= NULL
)
9175 if (dwarf2_read_debug
)
9177 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
9178 kind
, dwo_name
, hex_string (signature
),
9179 host_address_to_string (dwo_cutu
));
9186 /* We didn't find it. This could mean a dwo_id mismatch, or
9187 someone deleted the DWO/DWP file, or the search path isn't set up
9188 correctly to find the file. */
9190 if (dwarf2_read_debug
)
9192 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
9193 kind
, dwo_name
, hex_string (signature
));
9196 complaint (&symfile_complaints
,
9197 _("Could not find DWO CU referenced by CU at offset 0x%x"
9199 this_unit
->offset
.sect_off
, objfile
->name
);
9203 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
9204 See lookup_dwo_cutu_unit for details. */
9206 static struct dwo_unit
*
9207 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9208 const char *dwo_name
, const char *comp_dir
,
9211 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
9214 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
9215 See lookup_dwo_cutu_unit for details. */
9217 static struct dwo_unit
*
9218 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
9219 const char *dwo_name
, const char *comp_dir
)
9221 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
9224 /* Free all resources associated with DWO_FILE.
9225 Close the DWO file and munmap the sections.
9226 All memory should be on the objfile obstack. */
9229 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
9232 struct dwarf2_section_info
*section
;
9234 gdb_assert (dwo_file
->dbfd
!= objfile
->obfd
);
9235 gdb_bfd_unref (dwo_file
->dbfd
);
9237 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
9240 /* Wrapper for free_dwo_file for use in cleanups. */
9243 free_dwo_file_cleanup (void *arg
)
9245 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
9246 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9248 free_dwo_file (dwo_file
, objfile
);
9251 /* Traversal function for free_dwo_files. */
9254 free_dwo_file_from_slot (void **slot
, void *info
)
9256 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
9257 struct objfile
*objfile
= (struct objfile
*) info
;
9259 free_dwo_file (dwo_file
, objfile
);
9264 /* Free all resources associated with DWO_FILES. */
9267 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
9269 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
9272 /* Read in various DIEs. */
9274 /* qsort helper for inherit_abstract_dies. */
9277 unsigned_int_compar (const void *ap
, const void *bp
)
9279 unsigned int a
= *(unsigned int *) ap
;
9280 unsigned int b
= *(unsigned int *) bp
;
9282 return (a
> b
) - (b
> a
);
9285 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
9286 Inherit only the children of the DW_AT_abstract_origin DIE not being
9287 already referenced by DW_AT_abstract_origin from the children of the
9291 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
9293 struct die_info
*child_die
;
9294 unsigned die_children_count
;
9295 /* CU offsets which were referenced by children of the current DIE. */
9296 sect_offset
*offsets
;
9297 sect_offset
*offsets_end
, *offsetp
;
9298 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
9299 struct die_info
*origin_die
;
9300 /* Iterator of the ORIGIN_DIE children. */
9301 struct die_info
*origin_child_die
;
9302 struct cleanup
*cleanups
;
9303 struct attribute
*attr
;
9304 struct dwarf2_cu
*origin_cu
;
9305 struct pending
**origin_previous_list_in_scope
;
9307 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
9311 /* Note that following die references may follow to a die in a
9315 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
9317 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
9319 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
9320 origin_cu
->list_in_scope
= cu
->list_in_scope
;
9322 if (die
->tag
!= origin_die
->tag
9323 && !(die
->tag
== DW_TAG_inlined_subroutine
9324 && origin_die
->tag
== DW_TAG_subprogram
))
9325 complaint (&symfile_complaints
,
9326 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
9327 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
9329 child_die
= die
->child
;
9330 die_children_count
= 0;
9331 while (child_die
&& child_die
->tag
)
9333 child_die
= sibling_die (child_die
);
9334 die_children_count
++;
9336 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
9337 cleanups
= make_cleanup (xfree
, offsets
);
9339 offsets_end
= offsets
;
9340 child_die
= die
->child
;
9341 while (child_die
&& child_die
->tag
)
9343 /* For each CHILD_DIE, find the corresponding child of
9344 ORIGIN_DIE. If there is more than one layer of
9345 DW_AT_abstract_origin, follow them all; there shouldn't be,
9346 but GCC versions at least through 4.4 generate this (GCC PR
9348 struct die_info
*child_origin_die
= child_die
;
9349 struct dwarf2_cu
*child_origin_cu
= cu
;
9353 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
9357 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
9361 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
9362 counterpart may exist. */
9363 if (child_origin_die
!= child_die
)
9365 if (child_die
->tag
!= child_origin_die
->tag
9366 && !(child_die
->tag
== DW_TAG_inlined_subroutine
9367 && child_origin_die
->tag
== DW_TAG_subprogram
))
9368 complaint (&symfile_complaints
,
9369 _("Child DIE 0x%x and its abstract origin 0x%x have "
9370 "different tags"), child_die
->offset
.sect_off
,
9371 child_origin_die
->offset
.sect_off
);
9372 if (child_origin_die
->parent
!= origin_die
)
9373 complaint (&symfile_complaints
,
9374 _("Child DIE 0x%x and its abstract origin 0x%x have "
9375 "different parents"), child_die
->offset
.sect_off
,
9376 child_origin_die
->offset
.sect_off
);
9378 *offsets_end
++ = child_origin_die
->offset
;
9380 child_die
= sibling_die (child_die
);
9382 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
9383 unsigned_int_compar
);
9384 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
9385 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
9386 complaint (&symfile_complaints
,
9387 _("Multiple children of DIE 0x%x refer "
9388 "to DIE 0x%x as their abstract origin"),
9389 die
->offset
.sect_off
, offsetp
->sect_off
);
9392 origin_child_die
= origin_die
->child
;
9393 while (origin_child_die
&& origin_child_die
->tag
)
9395 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
9396 while (offsetp
< offsets_end
9397 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
9399 if (offsetp
>= offsets_end
9400 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
9402 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
9403 process_die (origin_child_die
, origin_cu
);
9405 origin_child_die
= sibling_die (origin_child_die
);
9407 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
9409 do_cleanups (cleanups
);
9413 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9415 struct objfile
*objfile
= cu
->objfile
;
9416 struct context_stack
*new;
9419 struct die_info
*child_die
;
9420 struct attribute
*attr
, *call_line
, *call_file
;
9423 struct block
*block
;
9424 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
9425 VEC (symbolp
) *template_args
= NULL
;
9426 struct template_symbol
*templ_func
= NULL
;
9430 /* If we do not have call site information, we can't show the
9431 caller of this inlined function. That's too confusing, so
9432 only use the scope for local variables. */
9433 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
9434 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
9435 if (call_line
== NULL
|| call_file
== NULL
)
9437 read_lexical_block_scope (die
, cu
);
9442 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9444 name
= dwarf2_name (die
, cu
);
9446 /* Ignore functions with missing or empty names. These are actually
9447 illegal according to the DWARF standard. */
9450 complaint (&symfile_complaints
,
9451 _("missing name for subprogram DIE at %d"),
9452 die
->offset
.sect_off
);
9456 /* Ignore functions with missing or invalid low and high pc attributes. */
9457 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
9459 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
9460 if (!attr
|| !DW_UNSND (attr
))
9461 complaint (&symfile_complaints
,
9462 _("cannot get low and high bounds "
9463 "for subprogram DIE at %d"),
9464 die
->offset
.sect_off
);
9471 /* If we have any template arguments, then we must allocate a
9472 different sort of symbol. */
9473 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
9475 if (child_die
->tag
== DW_TAG_template_type_param
9476 || child_die
->tag
== DW_TAG_template_value_param
)
9478 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
9479 struct template_symbol
);
9480 templ_func
->base
.is_cplus_template_function
= 1;
9485 new = push_context (0, lowpc
);
9486 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
9487 (struct symbol
*) templ_func
);
9489 /* If there is a location expression for DW_AT_frame_base, record
9491 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
9493 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
9494 expression is being recorded directly in the function's symbol
9495 and not in a separate frame-base object. I guess this hack is
9496 to avoid adding some sort of frame-base adjunct/annex to the
9497 function's symbol :-(. The problem with doing this is that it
9498 results in a function symbol with a location expression that
9499 has nothing to do with the location of the function, ouch! The
9500 relationship should be: a function's symbol has-a frame base; a
9501 frame-base has-a location expression. */
9502 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
9504 cu
->list_in_scope
= &local_symbols
;
9506 if (die
->child
!= NULL
)
9508 child_die
= die
->child
;
9509 while (child_die
&& child_die
->tag
)
9511 if (child_die
->tag
== DW_TAG_template_type_param
9512 || child_die
->tag
== DW_TAG_template_value_param
)
9514 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
9517 VEC_safe_push (symbolp
, template_args
, arg
);
9520 process_die (child_die
, cu
);
9521 child_die
= sibling_die (child_die
);
9525 inherit_abstract_dies (die
, cu
);
9527 /* If we have a DW_AT_specification, we might need to import using
9528 directives from the context of the specification DIE. See the
9529 comment in determine_prefix. */
9530 if (cu
->language
== language_cplus
9531 && dwarf2_attr (die
, DW_AT_specification
, cu
))
9533 struct dwarf2_cu
*spec_cu
= cu
;
9534 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
9538 child_die
= spec_die
->child
;
9539 while (child_die
&& child_die
->tag
)
9541 if (child_die
->tag
== DW_TAG_imported_module
)
9542 process_die (child_die
, spec_cu
);
9543 child_die
= sibling_die (child_die
);
9546 /* In some cases, GCC generates specification DIEs that
9547 themselves contain DW_AT_specification attributes. */
9548 spec_die
= die_specification (spec_die
, &spec_cu
);
9552 new = pop_context ();
9553 /* Make a block for the local symbols within. */
9554 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
9555 lowpc
, highpc
, objfile
);
9557 /* For C++, set the block's scope. */
9558 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
9559 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
9560 determine_prefix (die
, cu
),
9561 processing_has_namespace_info
);
9563 /* If we have address ranges, record them. */
9564 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
9566 /* Attach template arguments to function. */
9567 if (! VEC_empty (symbolp
, template_args
))
9569 gdb_assert (templ_func
!= NULL
);
9571 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
9572 templ_func
->template_arguments
9573 = obstack_alloc (&objfile
->objfile_obstack
,
9574 (templ_func
->n_template_arguments
9575 * sizeof (struct symbol
*)));
9576 memcpy (templ_func
->template_arguments
,
9577 VEC_address (symbolp
, template_args
),
9578 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
9579 VEC_free (symbolp
, template_args
);
9582 /* In C++, we can have functions nested inside functions (e.g., when
9583 a function declares a class that has methods). This means that
9584 when we finish processing a function scope, we may need to go
9585 back to building a containing block's symbol lists. */
9586 local_symbols
= new->locals
;
9587 using_directives
= new->using_directives
;
9589 /* If we've finished processing a top-level function, subsequent
9590 symbols go in the file symbol list. */
9591 if (outermost_context_p ())
9592 cu
->list_in_scope
= &file_symbols
;
9595 /* Process all the DIES contained within a lexical block scope. Start
9596 a new scope, process the dies, and then close the scope. */
9599 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9601 struct objfile
*objfile
= cu
->objfile
;
9602 struct context_stack
*new;
9603 CORE_ADDR lowpc
, highpc
;
9604 struct die_info
*child_die
;
9607 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9609 /* Ignore blocks with missing or invalid low and high pc attributes. */
9610 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
9611 as multiple lexical blocks? Handling children in a sane way would
9612 be nasty. Might be easier to properly extend generic blocks to
9614 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
9619 push_context (0, lowpc
);
9620 if (die
->child
!= NULL
)
9622 child_die
= die
->child
;
9623 while (child_die
&& child_die
->tag
)
9625 process_die (child_die
, cu
);
9626 child_die
= sibling_die (child_die
);
9629 new = pop_context ();
9631 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
9634 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
9637 /* Note that recording ranges after traversing children, as we
9638 do here, means that recording a parent's ranges entails
9639 walking across all its children's ranges as they appear in
9640 the address map, which is quadratic behavior.
9642 It would be nicer to record the parent's ranges before
9643 traversing its children, simply overriding whatever you find
9644 there. But since we don't even decide whether to create a
9645 block until after we've traversed its children, that's hard
9647 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
9649 local_symbols
= new->locals
;
9650 using_directives
= new->using_directives
;
9653 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
9656 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9658 struct objfile
*objfile
= cu
->objfile
;
9659 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9660 CORE_ADDR pc
, baseaddr
;
9661 struct attribute
*attr
;
9662 struct call_site
*call_site
, call_site_local
;
9665 struct die_info
*child_die
;
9667 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9669 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
9672 complaint (&symfile_complaints
,
9673 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
9674 "DIE 0x%x [in module %s]"),
9675 die
->offset
.sect_off
, objfile
->name
);
9678 pc
= DW_ADDR (attr
) + baseaddr
;
9680 if (cu
->call_site_htab
== NULL
)
9681 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
9682 NULL
, &objfile
->objfile_obstack
,
9683 hashtab_obstack_allocate
, NULL
);
9684 call_site_local
.pc
= pc
;
9685 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
9688 complaint (&symfile_complaints
,
9689 _("Duplicate PC %s for DW_TAG_GNU_call_site "
9690 "DIE 0x%x [in module %s]"),
9691 paddress (gdbarch
, pc
), die
->offset
.sect_off
, objfile
->name
);
9695 /* Count parameters at the caller. */
9698 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
9699 child_die
= sibling_die (child_die
))
9701 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
9703 complaint (&symfile_complaints
,
9704 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
9705 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9706 child_die
->tag
, child_die
->offset
.sect_off
, objfile
->name
);
9713 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
9714 (sizeof (*call_site
)
9715 + (sizeof (*call_site
->parameter
)
9718 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
9721 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
9723 struct die_info
*func_die
;
9725 /* Skip also over DW_TAG_inlined_subroutine. */
9726 for (func_die
= die
->parent
;
9727 func_die
&& func_die
->tag
!= DW_TAG_subprogram
9728 && func_die
->tag
!= DW_TAG_subroutine_type
;
9729 func_die
= func_die
->parent
);
9731 /* DW_AT_GNU_all_call_sites is a superset
9732 of DW_AT_GNU_all_tail_call_sites. */
9734 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
9735 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
9737 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
9738 not complete. But keep CALL_SITE for look ups via call_site_htab,
9739 both the initial caller containing the real return address PC and
9740 the final callee containing the current PC of a chain of tail
9741 calls do not need to have the tail call list complete. But any
9742 function candidate for a virtual tail call frame searched via
9743 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
9744 determined unambiguously. */
9748 struct type
*func_type
= NULL
;
9751 func_type
= get_die_type (func_die
, cu
);
9752 if (func_type
!= NULL
)
9754 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
9756 /* Enlist this call site to the function. */
9757 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
9758 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
9761 complaint (&symfile_complaints
,
9762 _("Cannot find function owning DW_TAG_GNU_call_site "
9763 "DIE 0x%x [in module %s]"),
9764 die
->offset
.sect_off
, objfile
->name
);
9768 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
9770 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
9771 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
9772 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
9773 /* Keep NULL DWARF_BLOCK. */;
9774 else if (attr_form_is_block (attr
))
9776 struct dwarf2_locexpr_baton
*dlbaton
;
9778 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
9779 dlbaton
->data
= DW_BLOCK (attr
)->data
;
9780 dlbaton
->size
= DW_BLOCK (attr
)->size
;
9781 dlbaton
->per_cu
= cu
->per_cu
;
9783 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
9785 else if (is_ref_attr (attr
))
9787 struct dwarf2_cu
*target_cu
= cu
;
9788 struct die_info
*target_die
;
9790 target_die
= follow_die_ref_or_sig (die
, attr
, &target_cu
);
9791 gdb_assert (target_cu
->objfile
== objfile
);
9792 if (die_is_declaration (target_die
, target_cu
))
9794 const char *target_physname
;
9796 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
9797 if (target_physname
== NULL
)
9798 complaint (&symfile_complaints
,
9799 _("DW_AT_GNU_call_site_target target DIE has invalid "
9800 "physname, for referencing DIE 0x%x [in module %s]"),
9801 die
->offset
.sect_off
, objfile
->name
);
9803 SET_FIELD_PHYSNAME (call_site
->target
, (char *) target_physname
);
9809 /* DW_AT_entry_pc should be preferred. */
9810 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
9811 complaint (&symfile_complaints
,
9812 _("DW_AT_GNU_call_site_target target DIE has invalid "
9813 "low pc, for referencing DIE 0x%x [in module %s]"),
9814 die
->offset
.sect_off
, objfile
->name
);
9816 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
+ baseaddr
);
9820 complaint (&symfile_complaints
,
9821 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
9822 "block nor reference, for DIE 0x%x [in module %s]"),
9823 die
->offset
.sect_off
, objfile
->name
);
9825 call_site
->per_cu
= cu
->per_cu
;
9827 for (child_die
= die
->child
;
9828 child_die
&& child_die
->tag
;
9829 child_die
= sibling_die (child_die
))
9831 struct call_site_parameter
*parameter
;
9832 struct attribute
*loc
, *origin
;
9834 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
9836 /* Already printed the complaint above. */
9840 gdb_assert (call_site
->parameter_count
< nparams
);
9841 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
9843 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
9844 specifies DW_TAG_formal_parameter. Value of the data assumed for the
9845 register is contained in DW_AT_GNU_call_site_value. */
9847 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
9848 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
9849 if (loc
== NULL
&& origin
!= NULL
&& is_ref_attr (origin
))
9853 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
9854 offset
= dwarf2_get_ref_die_offset (origin
);
9855 if (!offset_in_cu_p (&cu
->header
, offset
))
9857 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
9858 binding can be done only inside one CU. Such referenced DIE
9859 therefore cannot be even moved to DW_TAG_partial_unit. */
9860 complaint (&symfile_complaints
,
9861 _("DW_AT_abstract_origin offset is not in CU for "
9862 "DW_TAG_GNU_call_site child DIE 0x%x "
9864 child_die
->offset
.sect_off
, objfile
->name
);
9867 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
9868 - cu
->header
.offset
.sect_off
);
9870 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
9872 complaint (&symfile_complaints
,
9873 _("No DW_FORM_block* DW_AT_location for "
9874 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9875 child_die
->offset
.sect_off
, objfile
->name
);
9880 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
9881 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
9882 if (parameter
->u
.dwarf_reg
!= -1)
9883 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
9884 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
9885 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
9886 ¶meter
->u
.fb_offset
))
9887 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
9890 complaint (&symfile_complaints
,
9891 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
9892 "for DW_FORM_block* DW_AT_location is supported for "
9893 "DW_TAG_GNU_call_site child DIE 0x%x "
9895 child_die
->offset
.sect_off
, objfile
->name
);
9900 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
9901 if (!attr_form_is_block (attr
))
9903 complaint (&symfile_complaints
,
9904 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
9905 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9906 child_die
->offset
.sect_off
, objfile
->name
);
9909 parameter
->value
= DW_BLOCK (attr
)->data
;
9910 parameter
->value_size
= DW_BLOCK (attr
)->size
;
9912 /* Parameters are not pre-cleared by memset above. */
9913 parameter
->data_value
= NULL
;
9914 parameter
->data_value_size
= 0;
9915 call_site
->parameter_count
++;
9917 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
9920 if (!attr_form_is_block (attr
))
9921 complaint (&symfile_complaints
,
9922 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
9923 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9924 child_die
->offset
.sect_off
, objfile
->name
);
9927 parameter
->data_value
= DW_BLOCK (attr
)->data
;
9928 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
9934 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
9935 Return 1 if the attributes are present and valid, otherwise, return 0.
9936 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
9939 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
9940 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
9941 struct partial_symtab
*ranges_pst
)
9943 struct objfile
*objfile
= cu
->objfile
;
9944 struct comp_unit_head
*cu_header
= &cu
->header
;
9945 bfd
*obfd
= objfile
->obfd
;
9946 unsigned int addr_size
= cu_header
->addr_size
;
9947 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
9948 /* Base address selection entry. */
9959 found_base
= cu
->base_known
;
9960 base
= cu
->base_address
;
9962 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
9963 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
9965 complaint (&symfile_complaints
,
9966 _("Offset %d out of bounds for DW_AT_ranges attribute"),
9970 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
9972 /* Read in the largest possible address. */
9973 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
9974 if ((marker
& mask
) == mask
)
9976 /* If we found the largest possible address, then
9977 read the base address. */
9978 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
9979 buffer
+= 2 * addr_size
;
9980 offset
+= 2 * addr_size
;
9986 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9990 CORE_ADDR range_beginning
, range_end
;
9992 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
9993 buffer
+= addr_size
;
9994 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
9995 buffer
+= addr_size
;
9996 offset
+= 2 * addr_size
;
9998 /* An end of list marker is a pair of zero addresses. */
9999 if (range_beginning
== 0 && range_end
== 0)
10000 /* Found the end of list entry. */
10003 /* Each base address selection entry is a pair of 2 values.
10004 The first is the largest possible address, the second is
10005 the base address. Check for a base address here. */
10006 if ((range_beginning
& mask
) == mask
)
10008 /* If we found the largest possible address, then
10009 read the base address. */
10010 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
10017 /* We have no valid base address for the ranges
10019 complaint (&symfile_complaints
,
10020 _("Invalid .debug_ranges data (no base address)"));
10024 if (range_beginning
> range_end
)
10026 /* Inverted range entries are invalid. */
10027 complaint (&symfile_complaints
,
10028 _("Invalid .debug_ranges data (inverted range)"));
10032 /* Empty range entries have no effect. */
10033 if (range_beginning
== range_end
)
10036 range_beginning
+= base
;
10039 /* A not-uncommon case of bad debug info.
10040 Don't pollute the addrmap with bad data. */
10041 if (range_beginning
+ baseaddr
== 0
10042 && !dwarf2_per_objfile
->has_section_at_zero
)
10044 complaint (&symfile_complaints
,
10045 _(".debug_ranges entry has start address of zero"
10046 " [in module %s]"), objfile
->name
);
10050 if (ranges_pst
!= NULL
)
10051 addrmap_set_empty (objfile
->psymtabs_addrmap
,
10052 range_beginning
+ baseaddr
,
10053 range_end
- 1 + baseaddr
,
10056 /* FIXME: This is recording everything as a low-high
10057 segment of consecutive addresses. We should have a
10058 data structure for discontiguous block ranges
10062 low
= range_beginning
;
10068 if (range_beginning
< low
)
10069 low
= range_beginning
;
10070 if (range_end
> high
)
10076 /* If the first entry is an end-of-list marker, the range
10077 describes an empty scope, i.e. no instructions. */
10083 *high_return
= high
;
10087 /* Get low and high pc attributes from a die. Return 1 if the attributes
10088 are present and valid, otherwise, return 0. Return -1 if the range is
10089 discontinuous, i.e. derived from DW_AT_ranges information. */
10092 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
10093 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
10094 struct partial_symtab
*pst
)
10096 struct attribute
*attr
;
10097 struct attribute
*attr_high
;
10099 CORE_ADDR high
= 0;
10102 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
10105 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10108 low
= DW_ADDR (attr
);
10109 if (attr_high
->form
== DW_FORM_addr
10110 || attr_high
->form
== DW_FORM_GNU_addr_index
)
10111 high
= DW_ADDR (attr_high
);
10113 high
= low
+ DW_UNSND (attr_high
);
10116 /* Found high w/o low attribute. */
10119 /* Found consecutive range of addresses. */
10124 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
10127 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
10128 We take advantage of the fact that DW_AT_ranges does not appear
10129 in DW_TAG_compile_unit of DWO files. */
10130 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
10131 unsigned int ranges_offset
= (DW_UNSND (attr
)
10132 + (need_ranges_base
10136 /* Value of the DW_AT_ranges attribute is the offset in the
10137 .debug_ranges section. */
10138 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
10140 /* Found discontinuous range of addresses. */
10145 /* read_partial_die has also the strict LOW < HIGH requirement. */
10149 /* When using the GNU linker, .gnu.linkonce. sections are used to
10150 eliminate duplicate copies of functions and vtables and such.
10151 The linker will arbitrarily choose one and discard the others.
10152 The AT_*_pc values for such functions refer to local labels in
10153 these sections. If the section from that file was discarded, the
10154 labels are not in the output, so the relocs get a value of 0.
10155 If this is a discarded function, mark the pc bounds as invalid,
10156 so that GDB will ignore it. */
10157 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
10166 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
10167 its low and high PC addresses. Do nothing if these addresses could not
10168 be determined. Otherwise, set LOWPC to the low address if it is smaller,
10169 and HIGHPC to the high address if greater than HIGHPC. */
10172 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
10173 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
10174 struct dwarf2_cu
*cu
)
10176 CORE_ADDR low
, high
;
10177 struct die_info
*child
= die
->child
;
10179 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
10181 *lowpc
= min (*lowpc
, low
);
10182 *highpc
= max (*highpc
, high
);
10185 /* If the language does not allow nested subprograms (either inside
10186 subprograms or lexical blocks), we're done. */
10187 if (cu
->language
!= language_ada
)
10190 /* Check all the children of the given DIE. If it contains nested
10191 subprograms, then check their pc bounds. Likewise, we need to
10192 check lexical blocks as well, as they may also contain subprogram
10194 while (child
&& child
->tag
)
10196 if (child
->tag
== DW_TAG_subprogram
10197 || child
->tag
== DW_TAG_lexical_block
)
10198 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
10199 child
= sibling_die (child
);
10203 /* Get the low and high pc's represented by the scope DIE, and store
10204 them in *LOWPC and *HIGHPC. If the correct values can't be
10205 determined, set *LOWPC to -1 and *HIGHPC to 0. */
10208 get_scope_pc_bounds (struct die_info
*die
,
10209 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
10210 struct dwarf2_cu
*cu
)
10212 CORE_ADDR best_low
= (CORE_ADDR
) -1;
10213 CORE_ADDR best_high
= (CORE_ADDR
) 0;
10214 CORE_ADDR current_low
, current_high
;
10216 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
10218 best_low
= current_low
;
10219 best_high
= current_high
;
10223 struct die_info
*child
= die
->child
;
10225 while (child
&& child
->tag
)
10227 switch (child
->tag
) {
10228 case DW_TAG_subprogram
:
10229 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
10231 case DW_TAG_namespace
:
10232 case DW_TAG_module
:
10233 /* FIXME: carlton/2004-01-16: Should we do this for
10234 DW_TAG_class_type/DW_TAG_structure_type, too? I think
10235 that current GCC's always emit the DIEs corresponding
10236 to definitions of methods of classes as children of a
10237 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
10238 the DIEs giving the declarations, which could be
10239 anywhere). But I don't see any reason why the
10240 standards says that they have to be there. */
10241 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
10243 if (current_low
!= ((CORE_ADDR
) -1))
10245 best_low
= min (best_low
, current_low
);
10246 best_high
= max (best_high
, current_high
);
10254 child
= sibling_die (child
);
10259 *highpc
= best_high
;
10262 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
10266 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
10267 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
10269 struct objfile
*objfile
= cu
->objfile
;
10270 struct attribute
*attr
;
10271 struct attribute
*attr_high
;
10273 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
10276 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10279 CORE_ADDR low
= DW_ADDR (attr
);
10281 if (attr_high
->form
== DW_FORM_addr
10282 || attr_high
->form
== DW_FORM_GNU_addr_index
)
10283 high
= DW_ADDR (attr_high
);
10285 high
= low
+ DW_UNSND (attr_high
);
10287 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
10291 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
10294 bfd
*obfd
= objfile
->obfd
;
10295 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
10296 We take advantage of the fact that DW_AT_ranges does not appear
10297 in DW_TAG_compile_unit of DWO files. */
10298 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
10300 /* The value of the DW_AT_ranges attribute is the offset of the
10301 address range list in the .debug_ranges section. */
10302 unsigned long offset
= (DW_UNSND (attr
)
10303 + (need_ranges_base
? cu
->ranges_base
: 0));
10304 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
10306 /* For some target architectures, but not others, the
10307 read_address function sign-extends the addresses it returns.
10308 To recognize base address selection entries, we need a
10310 unsigned int addr_size
= cu
->header
.addr_size
;
10311 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
10313 /* The base address, to which the next pair is relative. Note
10314 that this 'base' is a DWARF concept: most entries in a range
10315 list are relative, to reduce the number of relocs against the
10316 debugging information. This is separate from this function's
10317 'baseaddr' argument, which GDB uses to relocate debugging
10318 information from a shared library based on the address at
10319 which the library was loaded. */
10320 CORE_ADDR base
= cu
->base_address
;
10321 int base_known
= cu
->base_known
;
10323 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
10324 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
10326 complaint (&symfile_complaints
,
10327 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
10334 unsigned int bytes_read
;
10335 CORE_ADDR start
, end
;
10337 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
10338 buffer
+= bytes_read
;
10339 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
10340 buffer
+= bytes_read
;
10342 /* Did we find the end of the range list? */
10343 if (start
== 0 && end
== 0)
10346 /* Did we find a base address selection entry? */
10347 else if ((start
& base_select_mask
) == base_select_mask
)
10353 /* We found an ordinary address range. */
10358 complaint (&symfile_complaints
,
10359 _("Invalid .debug_ranges data "
10360 "(no base address)"));
10366 /* Inverted range entries are invalid. */
10367 complaint (&symfile_complaints
,
10368 _("Invalid .debug_ranges data "
10369 "(inverted range)"));
10373 /* Empty range entries have no effect. */
10377 start
+= base
+ baseaddr
;
10378 end
+= base
+ baseaddr
;
10380 /* A not-uncommon case of bad debug info.
10381 Don't pollute the addrmap with bad data. */
10382 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
10384 complaint (&symfile_complaints
,
10385 _(".debug_ranges entry has start address of zero"
10386 " [in module %s]"), objfile
->name
);
10390 record_block_range (block
, start
, end
- 1);
10396 /* Check whether the producer field indicates either of GCC < 4.6, or the
10397 Intel C/C++ compiler, and cache the result in CU. */
10400 check_producer (struct dwarf2_cu
*cu
)
10403 int major
, minor
, release
;
10405 if (cu
->producer
== NULL
)
10407 /* For unknown compilers expect their behavior is DWARF version
10410 GCC started to support .debug_types sections by -gdwarf-4 since
10411 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
10412 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
10413 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
10414 interpreted incorrectly by GDB now - GCC PR debug/48229. */
10416 else if (strncmp (cu
->producer
, "GNU ", strlen ("GNU ")) == 0)
10418 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
10420 cs
= &cu
->producer
[strlen ("GNU ")];
10421 while (*cs
&& !isdigit (*cs
))
10423 if (sscanf (cs
, "%d.%d.%d", &major
, &minor
, &release
) != 3)
10425 /* Not recognized as GCC. */
10429 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
10430 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
10433 else if (strncmp (cu
->producer
, "Intel(R) C", strlen ("Intel(R) C")) == 0)
10434 cu
->producer_is_icc
= 1;
10437 /* For other non-GCC compilers, expect their behavior is DWARF version
10441 cu
->checked_producer
= 1;
10444 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
10445 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
10446 during 4.6.0 experimental. */
10449 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
10451 if (!cu
->checked_producer
)
10452 check_producer (cu
);
10454 return cu
->producer_is_gxx_lt_4_6
;
10457 /* Return the default accessibility type if it is not overriden by
10458 DW_AT_accessibility. */
10460 static enum dwarf_access_attribute
10461 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
10463 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
10465 /* The default DWARF 2 accessibility for members is public, the default
10466 accessibility for inheritance is private. */
10468 if (die
->tag
!= DW_TAG_inheritance
)
10469 return DW_ACCESS_public
;
10471 return DW_ACCESS_private
;
10475 /* DWARF 3+ defines the default accessibility a different way. The same
10476 rules apply now for DW_TAG_inheritance as for the members and it only
10477 depends on the container kind. */
10479 if (die
->parent
->tag
== DW_TAG_class_type
)
10480 return DW_ACCESS_private
;
10482 return DW_ACCESS_public
;
10486 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
10487 offset. If the attribute was not found return 0, otherwise return
10488 1. If it was found but could not properly be handled, set *OFFSET
10492 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
10495 struct attribute
*attr
;
10497 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
10502 /* Note that we do not check for a section offset first here.
10503 This is because DW_AT_data_member_location is new in DWARF 4,
10504 so if we see it, we can assume that a constant form is really
10505 a constant and not a section offset. */
10506 if (attr_form_is_constant (attr
))
10507 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
10508 else if (attr_form_is_section_offset (attr
))
10509 dwarf2_complex_location_expr_complaint ();
10510 else if (attr_form_is_block (attr
))
10511 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
10513 dwarf2_complex_location_expr_complaint ();
10521 /* Add an aggregate field to the field list. */
10524 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
10525 struct dwarf2_cu
*cu
)
10527 struct objfile
*objfile
= cu
->objfile
;
10528 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10529 struct nextfield
*new_field
;
10530 struct attribute
*attr
;
10532 const char *fieldname
= "";
10534 /* Allocate a new field list entry and link it in. */
10535 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
10536 make_cleanup (xfree
, new_field
);
10537 memset (new_field
, 0, sizeof (struct nextfield
));
10539 if (die
->tag
== DW_TAG_inheritance
)
10541 new_field
->next
= fip
->baseclasses
;
10542 fip
->baseclasses
= new_field
;
10546 new_field
->next
= fip
->fields
;
10547 fip
->fields
= new_field
;
10551 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
10553 new_field
->accessibility
= DW_UNSND (attr
);
10555 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
10556 if (new_field
->accessibility
!= DW_ACCESS_public
)
10557 fip
->non_public_fields
= 1;
10559 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
10561 new_field
->virtuality
= DW_UNSND (attr
);
10563 new_field
->virtuality
= DW_VIRTUALITY_none
;
10565 fp
= &new_field
->field
;
10567 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
10571 /* Data member other than a C++ static data member. */
10573 /* Get type of field. */
10574 fp
->type
= die_type (die
, cu
);
10576 SET_FIELD_BITPOS (*fp
, 0);
10578 /* Get bit size of field (zero if none). */
10579 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
10582 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
10586 FIELD_BITSIZE (*fp
) = 0;
10589 /* Get bit offset of field. */
10590 if (handle_data_member_location (die
, cu
, &offset
))
10591 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
10592 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
10595 if (gdbarch_bits_big_endian (gdbarch
))
10597 /* For big endian bits, the DW_AT_bit_offset gives the
10598 additional bit offset from the MSB of the containing
10599 anonymous object to the MSB of the field. We don't
10600 have to do anything special since we don't need to
10601 know the size of the anonymous object. */
10602 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
10606 /* For little endian bits, compute the bit offset to the
10607 MSB of the anonymous object, subtract off the number of
10608 bits from the MSB of the field to the MSB of the
10609 object, and then subtract off the number of bits of
10610 the field itself. The result is the bit offset of
10611 the LSB of the field. */
10612 int anonymous_size
;
10613 int bit_offset
= DW_UNSND (attr
);
10615 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10618 /* The size of the anonymous object containing
10619 the bit field is explicit, so use the
10620 indicated size (in bytes). */
10621 anonymous_size
= DW_UNSND (attr
);
10625 /* The size of the anonymous object containing
10626 the bit field must be inferred from the type
10627 attribute of the data member containing the
10629 anonymous_size
= TYPE_LENGTH (fp
->type
);
10631 SET_FIELD_BITPOS (*fp
,
10632 (FIELD_BITPOS (*fp
)
10633 + anonymous_size
* bits_per_byte
10634 - bit_offset
- FIELD_BITSIZE (*fp
)));
10638 /* Get name of field. */
10639 fieldname
= dwarf2_name (die
, cu
);
10640 if (fieldname
== NULL
)
10643 /* The name is already allocated along with this objfile, so we don't
10644 need to duplicate it for the type. */
10645 fp
->name
= fieldname
;
10647 /* Change accessibility for artificial fields (e.g. virtual table
10648 pointer or virtual base class pointer) to private. */
10649 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
10651 FIELD_ARTIFICIAL (*fp
) = 1;
10652 new_field
->accessibility
= DW_ACCESS_private
;
10653 fip
->non_public_fields
= 1;
10656 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
10658 /* C++ static member. */
10660 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
10661 is a declaration, but all versions of G++ as of this writing
10662 (so through at least 3.2.1) incorrectly generate
10663 DW_TAG_variable tags. */
10665 const char *physname
;
10667 /* Get name of field. */
10668 fieldname
= dwarf2_name (die
, cu
);
10669 if (fieldname
== NULL
)
10672 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10674 /* Only create a symbol if this is an external value.
10675 new_symbol checks this and puts the value in the global symbol
10676 table, which we want. If it is not external, new_symbol
10677 will try to put the value in cu->list_in_scope which is wrong. */
10678 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
10680 /* A static const member, not much different than an enum as far as
10681 we're concerned, except that we can support more types. */
10682 new_symbol (die
, NULL
, cu
);
10685 /* Get physical name. */
10686 physname
= dwarf2_physname (fieldname
, die
, cu
);
10688 /* The name is already allocated along with this objfile, so we don't
10689 need to duplicate it for the type. */
10690 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
10691 FIELD_TYPE (*fp
) = die_type (die
, cu
);
10692 FIELD_NAME (*fp
) = fieldname
;
10694 else if (die
->tag
== DW_TAG_inheritance
)
10698 /* C++ base class field. */
10699 if (handle_data_member_location (die
, cu
, &offset
))
10700 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
10701 FIELD_BITSIZE (*fp
) = 0;
10702 FIELD_TYPE (*fp
) = die_type (die
, cu
);
10703 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
10704 fip
->nbaseclasses
++;
10708 /* Add a typedef defined in the scope of the FIP's class. */
10711 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
10712 struct dwarf2_cu
*cu
)
10714 struct objfile
*objfile
= cu
->objfile
;
10715 struct typedef_field_list
*new_field
;
10716 struct attribute
*attr
;
10717 struct typedef_field
*fp
;
10718 char *fieldname
= "";
10720 /* Allocate a new field list entry and link it in. */
10721 new_field
= xzalloc (sizeof (*new_field
));
10722 make_cleanup (xfree
, new_field
);
10724 gdb_assert (die
->tag
== DW_TAG_typedef
);
10726 fp
= &new_field
->field
;
10728 /* Get name of field. */
10729 fp
->name
= dwarf2_name (die
, cu
);
10730 if (fp
->name
== NULL
)
10733 fp
->type
= read_type_die (die
, cu
);
10735 new_field
->next
= fip
->typedef_field_list
;
10736 fip
->typedef_field_list
= new_field
;
10737 fip
->typedef_field_list_count
++;
10740 /* Create the vector of fields, and attach it to the type. */
10743 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
10744 struct dwarf2_cu
*cu
)
10746 int nfields
= fip
->nfields
;
10748 /* Record the field count, allocate space for the array of fields,
10749 and create blank accessibility bitfields if necessary. */
10750 TYPE_NFIELDS (type
) = nfields
;
10751 TYPE_FIELDS (type
) = (struct field
*)
10752 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
10753 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
10755 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
10757 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10759 TYPE_FIELD_PRIVATE_BITS (type
) =
10760 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10761 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
10763 TYPE_FIELD_PROTECTED_BITS (type
) =
10764 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10765 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
10767 TYPE_FIELD_IGNORE_BITS (type
) =
10768 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10769 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
10772 /* If the type has baseclasses, allocate and clear a bit vector for
10773 TYPE_FIELD_VIRTUAL_BITS. */
10774 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
10776 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
10777 unsigned char *pointer
;
10779 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10780 pointer
= TYPE_ALLOC (type
, num_bytes
);
10781 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
10782 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
10783 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
10786 /* Copy the saved-up fields into the field vector. Start from the head of
10787 the list, adding to the tail of the field array, so that they end up in
10788 the same order in the array in which they were added to the list. */
10789 while (nfields
-- > 0)
10791 struct nextfield
*fieldp
;
10795 fieldp
= fip
->fields
;
10796 fip
->fields
= fieldp
->next
;
10800 fieldp
= fip
->baseclasses
;
10801 fip
->baseclasses
= fieldp
->next
;
10804 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
10805 switch (fieldp
->accessibility
)
10807 case DW_ACCESS_private
:
10808 if (cu
->language
!= language_ada
)
10809 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
10812 case DW_ACCESS_protected
:
10813 if (cu
->language
!= language_ada
)
10814 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
10817 case DW_ACCESS_public
:
10821 /* Unknown accessibility. Complain and treat it as public. */
10823 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
10824 fieldp
->accessibility
);
10828 if (nfields
< fip
->nbaseclasses
)
10830 switch (fieldp
->virtuality
)
10832 case DW_VIRTUALITY_virtual
:
10833 case DW_VIRTUALITY_pure_virtual
:
10834 if (cu
->language
== language_ada
)
10835 error (_("unexpected virtuality in component of Ada type"));
10836 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
10843 /* Return true if this member function is a constructor, false
10847 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
10849 const char *fieldname
;
10850 const char *typename
;
10853 if (die
->parent
== NULL
)
10856 if (die
->parent
->tag
!= DW_TAG_structure_type
10857 && die
->parent
->tag
!= DW_TAG_union_type
10858 && die
->parent
->tag
!= DW_TAG_class_type
)
10861 fieldname
= dwarf2_name (die
, cu
);
10862 typename
= dwarf2_name (die
->parent
, cu
);
10863 if (fieldname
== NULL
|| typename
== NULL
)
10866 len
= strlen (fieldname
);
10867 return (strncmp (fieldname
, typename
, len
) == 0
10868 && (typename
[len
] == '\0' || typename
[len
] == '<'));
10871 /* Add a member function to the proper fieldlist. */
10874 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
10875 struct type
*type
, struct dwarf2_cu
*cu
)
10877 struct objfile
*objfile
= cu
->objfile
;
10878 struct attribute
*attr
;
10879 struct fnfieldlist
*flp
;
10881 struct fn_field
*fnp
;
10882 const char *fieldname
;
10883 struct nextfnfield
*new_fnfield
;
10884 struct type
*this_type
;
10885 enum dwarf_access_attribute accessibility
;
10887 if (cu
->language
== language_ada
)
10888 error (_("unexpected member function in Ada type"));
10890 /* Get name of member function. */
10891 fieldname
= dwarf2_name (die
, cu
);
10892 if (fieldname
== NULL
)
10895 /* Look up member function name in fieldlist. */
10896 for (i
= 0; i
< fip
->nfnfields
; i
++)
10898 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
10902 /* Create new list element if necessary. */
10903 if (i
< fip
->nfnfields
)
10904 flp
= &fip
->fnfieldlists
[i
];
10907 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
10909 fip
->fnfieldlists
= (struct fnfieldlist
*)
10910 xrealloc (fip
->fnfieldlists
,
10911 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
10912 * sizeof (struct fnfieldlist
));
10913 if (fip
->nfnfields
== 0)
10914 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
10916 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
10917 flp
->name
= fieldname
;
10920 i
= fip
->nfnfields
++;
10923 /* Create a new member function field and chain it to the field list
10925 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
10926 make_cleanup (xfree
, new_fnfield
);
10927 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
10928 new_fnfield
->next
= flp
->head
;
10929 flp
->head
= new_fnfield
;
10932 /* Fill in the member function field info. */
10933 fnp
= &new_fnfield
->fnfield
;
10935 /* Delay processing of the physname until later. */
10936 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
10938 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
10943 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
10944 fnp
->physname
= physname
? physname
: "";
10947 fnp
->type
= alloc_type (objfile
);
10948 this_type
= read_type_die (die
, cu
);
10949 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
10951 int nparams
= TYPE_NFIELDS (this_type
);
10953 /* TYPE is the domain of this method, and THIS_TYPE is the type
10954 of the method itself (TYPE_CODE_METHOD). */
10955 smash_to_method_type (fnp
->type
, type
,
10956 TYPE_TARGET_TYPE (this_type
),
10957 TYPE_FIELDS (this_type
),
10958 TYPE_NFIELDS (this_type
),
10959 TYPE_VARARGS (this_type
));
10961 /* Handle static member functions.
10962 Dwarf2 has no clean way to discern C++ static and non-static
10963 member functions. G++ helps GDB by marking the first
10964 parameter for non-static member functions (which is the this
10965 pointer) as artificial. We obtain this information from
10966 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
10967 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
10968 fnp
->voffset
= VOFFSET_STATIC
;
10971 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
10972 dwarf2_full_name (fieldname
, die
, cu
));
10974 /* Get fcontext from DW_AT_containing_type if present. */
10975 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
10976 fnp
->fcontext
= die_containing_type (die
, cu
);
10978 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
10979 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
10981 /* Get accessibility. */
10982 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
10984 accessibility
= DW_UNSND (attr
);
10986 accessibility
= dwarf2_default_access_attribute (die
, cu
);
10987 switch (accessibility
)
10989 case DW_ACCESS_private
:
10990 fnp
->is_private
= 1;
10992 case DW_ACCESS_protected
:
10993 fnp
->is_protected
= 1;
10997 /* Check for artificial methods. */
10998 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
10999 if (attr
&& DW_UNSND (attr
) != 0)
11000 fnp
->is_artificial
= 1;
11002 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
11004 /* Get index in virtual function table if it is a virtual member
11005 function. For older versions of GCC, this is an offset in the
11006 appropriate virtual table, as specified by DW_AT_containing_type.
11007 For everyone else, it is an expression to be evaluated relative
11008 to the object address. */
11010 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
11013 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
11015 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
11017 /* Old-style GCC. */
11018 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
11020 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
11021 || (DW_BLOCK (attr
)->size
> 1
11022 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
11023 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
11025 struct dwarf_block blk
;
11028 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
11030 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
11031 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
11032 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
11033 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
11034 dwarf2_complex_location_expr_complaint ();
11036 fnp
->voffset
/= cu
->header
.addr_size
;
11040 dwarf2_complex_location_expr_complaint ();
11042 if (!fnp
->fcontext
)
11043 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
11045 else if (attr_form_is_section_offset (attr
))
11047 dwarf2_complex_location_expr_complaint ();
11051 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
11057 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
11058 if (attr
&& DW_UNSND (attr
))
11060 /* GCC does this, as of 2008-08-25; PR debug/37237. */
11061 complaint (&symfile_complaints
,
11062 _("Member function \"%s\" (offset %d) is virtual "
11063 "but the vtable offset is not specified"),
11064 fieldname
, die
->offset
.sect_off
);
11065 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11066 TYPE_CPLUS_DYNAMIC (type
) = 1;
11071 /* Create the vector of member function fields, and attach it to the type. */
11074 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
11075 struct dwarf2_cu
*cu
)
11077 struct fnfieldlist
*flp
;
11080 if (cu
->language
== language_ada
)
11081 error (_("unexpected member functions in Ada type"));
11083 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11084 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
11085 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
11087 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
11089 struct nextfnfield
*nfp
= flp
->head
;
11090 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
11093 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
11094 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
11095 fn_flp
->fn_fields
= (struct fn_field
*)
11096 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
11097 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
11098 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
11101 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
11104 /* Returns non-zero if NAME is the name of a vtable member in CU's
11105 language, zero otherwise. */
11107 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
11109 static const char vptr
[] = "_vptr";
11110 static const char vtable
[] = "vtable";
11112 /* Look for the C++ and Java forms of the vtable. */
11113 if ((cu
->language
== language_java
11114 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
11115 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
11116 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
11122 /* GCC outputs unnamed structures that are really pointers to member
11123 functions, with the ABI-specified layout. If TYPE describes
11124 such a structure, smash it into a member function type.
11126 GCC shouldn't do this; it should just output pointer to member DIEs.
11127 This is GCC PR debug/28767. */
11130 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
11132 struct type
*pfn_type
, *domain_type
, *new_type
;
11134 /* Check for a structure with no name and two children. */
11135 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
11138 /* Check for __pfn and __delta members. */
11139 if (TYPE_FIELD_NAME (type
, 0) == NULL
11140 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
11141 || TYPE_FIELD_NAME (type
, 1) == NULL
11142 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
11145 /* Find the type of the method. */
11146 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
11147 if (pfn_type
== NULL
11148 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
11149 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
11152 /* Look for the "this" argument. */
11153 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
11154 if (TYPE_NFIELDS (pfn_type
) == 0
11155 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
11156 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
11159 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
11160 new_type
= alloc_type (objfile
);
11161 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
11162 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
11163 TYPE_VARARGS (pfn_type
));
11164 smash_to_methodptr_type (type
, new_type
);
11167 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
11171 producer_is_icc (struct dwarf2_cu
*cu
)
11173 if (!cu
->checked_producer
)
11174 check_producer (cu
);
11176 return cu
->producer_is_icc
;
11179 /* Called when we find the DIE that starts a structure or union scope
11180 (definition) to create a type for the structure or union. Fill in
11181 the type's name and general properties; the members will not be
11182 processed until process_structure_type.
11184 NOTE: we need to call these functions regardless of whether or not the
11185 DIE has a DW_AT_name attribute, since it might be an anonymous
11186 structure or union. This gets the type entered into our set of
11187 user defined types.
11189 However, if the structure is incomplete (an opaque struct/union)
11190 then suppress creating a symbol table entry for it since gdb only
11191 wants to find the one with the complete definition. Note that if
11192 it is complete, we just call new_symbol, which does it's own
11193 checking about whether the struct/union is anonymous or not (and
11194 suppresses creating a symbol table entry itself). */
11196 static struct type
*
11197 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11199 struct objfile
*objfile
= cu
->objfile
;
11201 struct attribute
*attr
;
11204 /* If the definition of this type lives in .debug_types, read that type.
11205 Don't follow DW_AT_specification though, that will take us back up
11206 the chain and we want to go down. */
11207 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
11210 struct dwarf2_cu
*type_cu
= cu
;
11211 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11213 /* We could just recurse on read_structure_type, but we need to call
11214 get_die_type to ensure only one type for this DIE is created.
11215 This is important, for example, because for c++ classes we need
11216 TYPE_NAME set which is only done by new_symbol. Blech. */
11217 type
= read_type_die (type_die
, type_cu
);
11219 /* TYPE_CU may not be the same as CU.
11220 Ensure TYPE is recorded in CU's type_hash table. */
11221 return set_die_type (die
, type
, cu
);
11224 type
= alloc_type (objfile
);
11225 INIT_CPLUS_SPECIFIC (type
);
11227 name
= dwarf2_name (die
, cu
);
11230 if (cu
->language
== language_cplus
11231 || cu
->language
== language_java
)
11233 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
11235 /* dwarf2_full_name might have already finished building the DIE's
11236 type. If so, there is no need to continue. */
11237 if (get_die_type (die
, cu
) != NULL
)
11238 return get_die_type (die
, cu
);
11240 TYPE_TAG_NAME (type
) = full_name
;
11241 if (die
->tag
== DW_TAG_structure_type
11242 || die
->tag
== DW_TAG_class_type
)
11243 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
11247 /* The name is already allocated along with this objfile, so
11248 we don't need to duplicate it for the type. */
11249 TYPE_TAG_NAME (type
) = (char *) name
;
11250 if (die
->tag
== DW_TAG_class_type
)
11251 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
11255 if (die
->tag
== DW_TAG_structure_type
)
11257 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
11259 else if (die
->tag
== DW_TAG_union_type
)
11261 TYPE_CODE (type
) = TYPE_CODE_UNION
;
11265 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
11268 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
11269 TYPE_DECLARED_CLASS (type
) = 1;
11271 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11274 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11278 TYPE_LENGTH (type
) = 0;
11281 if (producer_is_icc (cu
))
11283 /* ICC does not output the required DW_AT_declaration
11284 on incomplete types, but gives them a size of zero. */
11287 TYPE_STUB_SUPPORTED (type
) = 1;
11289 if (die_is_declaration (die
, cu
))
11290 TYPE_STUB (type
) = 1;
11291 else if (attr
== NULL
&& die
->child
== NULL
11292 && producer_is_realview (cu
->producer
))
11293 /* RealView does not output the required DW_AT_declaration
11294 on incomplete types. */
11295 TYPE_STUB (type
) = 1;
11297 /* We need to add the type field to the die immediately so we don't
11298 infinitely recurse when dealing with pointers to the structure
11299 type within the structure itself. */
11300 set_die_type (die
, type
, cu
);
11302 /* set_die_type should be already done. */
11303 set_descriptive_type (type
, die
, cu
);
11308 /* Finish creating a structure or union type, including filling in
11309 its members and creating a symbol for it. */
11312 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11314 struct objfile
*objfile
= cu
->objfile
;
11315 struct die_info
*child_die
= die
->child
;
11318 type
= get_die_type (die
, cu
);
11320 type
= read_structure_type (die
, cu
);
11322 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
11324 struct field_info fi
;
11325 struct die_info
*child_die
;
11326 VEC (symbolp
) *template_args
= NULL
;
11327 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
11329 memset (&fi
, 0, sizeof (struct field_info
));
11331 child_die
= die
->child
;
11333 while (child_die
&& child_die
->tag
)
11335 if (child_die
->tag
== DW_TAG_member
11336 || child_die
->tag
== DW_TAG_variable
)
11338 /* NOTE: carlton/2002-11-05: A C++ static data member
11339 should be a DW_TAG_member that is a declaration, but
11340 all versions of G++ as of this writing (so through at
11341 least 3.2.1) incorrectly generate DW_TAG_variable
11342 tags for them instead. */
11343 dwarf2_add_field (&fi
, child_die
, cu
);
11345 else if (child_die
->tag
== DW_TAG_subprogram
)
11347 /* C++ member function. */
11348 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
11350 else if (child_die
->tag
== DW_TAG_inheritance
)
11352 /* C++ base class field. */
11353 dwarf2_add_field (&fi
, child_die
, cu
);
11355 else if (child_die
->tag
== DW_TAG_typedef
)
11356 dwarf2_add_typedef (&fi
, child_die
, cu
);
11357 else if (child_die
->tag
== DW_TAG_template_type_param
11358 || child_die
->tag
== DW_TAG_template_value_param
)
11360 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11363 VEC_safe_push (symbolp
, template_args
, arg
);
11366 child_die
= sibling_die (child_die
);
11369 /* Attach template arguments to type. */
11370 if (! VEC_empty (symbolp
, template_args
))
11372 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11373 TYPE_N_TEMPLATE_ARGUMENTS (type
)
11374 = VEC_length (symbolp
, template_args
);
11375 TYPE_TEMPLATE_ARGUMENTS (type
)
11376 = obstack_alloc (&objfile
->objfile_obstack
,
11377 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
11378 * sizeof (struct symbol
*)));
11379 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
11380 VEC_address (symbolp
, template_args
),
11381 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
11382 * sizeof (struct symbol
*)));
11383 VEC_free (symbolp
, template_args
);
11386 /* Attach fields and member functions to the type. */
11388 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
11391 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
11393 /* Get the type which refers to the base class (possibly this
11394 class itself) which contains the vtable pointer for the current
11395 class from the DW_AT_containing_type attribute. This use of
11396 DW_AT_containing_type is a GNU extension. */
11398 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
11400 struct type
*t
= die_containing_type (die
, cu
);
11402 TYPE_VPTR_BASETYPE (type
) = t
;
11407 /* Our own class provides vtbl ptr. */
11408 for (i
= TYPE_NFIELDS (t
) - 1;
11409 i
>= TYPE_N_BASECLASSES (t
);
11412 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
11414 if (is_vtable_name (fieldname
, cu
))
11416 TYPE_VPTR_FIELDNO (type
) = i
;
11421 /* Complain if virtual function table field not found. */
11422 if (i
< TYPE_N_BASECLASSES (t
))
11423 complaint (&symfile_complaints
,
11424 _("virtual function table pointer "
11425 "not found when defining class '%s'"),
11426 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
11431 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
11434 else if (cu
->producer
11435 && strncmp (cu
->producer
,
11436 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
11438 /* The IBM XLC compiler does not provide direct indication
11439 of the containing type, but the vtable pointer is
11440 always named __vfp. */
11444 for (i
= TYPE_NFIELDS (type
) - 1;
11445 i
>= TYPE_N_BASECLASSES (type
);
11448 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
11450 TYPE_VPTR_FIELDNO (type
) = i
;
11451 TYPE_VPTR_BASETYPE (type
) = type
;
11458 /* Copy fi.typedef_field_list linked list elements content into the
11459 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
11460 if (fi
.typedef_field_list
)
11462 int i
= fi
.typedef_field_list_count
;
11464 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11465 TYPE_TYPEDEF_FIELD_ARRAY (type
)
11466 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
11467 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
11469 /* Reverse the list order to keep the debug info elements order. */
11472 struct typedef_field
*dest
, *src
;
11474 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
11475 src
= &fi
.typedef_field_list
->field
;
11476 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
11481 do_cleanups (back_to
);
11483 if (HAVE_CPLUS_STRUCT (type
))
11484 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
11487 quirk_gcc_member_function_pointer (type
, objfile
);
11489 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
11490 snapshots) has been known to create a die giving a declaration
11491 for a class that has, as a child, a die giving a definition for a
11492 nested class. So we have to process our children even if the
11493 current die is a declaration. Normally, of course, a declaration
11494 won't have any children at all. */
11496 while (child_die
!= NULL
&& child_die
->tag
)
11498 if (child_die
->tag
== DW_TAG_member
11499 || child_die
->tag
== DW_TAG_variable
11500 || child_die
->tag
== DW_TAG_inheritance
11501 || child_die
->tag
== DW_TAG_template_value_param
11502 || child_die
->tag
== DW_TAG_template_type_param
)
11507 process_die (child_die
, cu
);
11509 child_die
= sibling_die (child_die
);
11512 /* Do not consider external references. According to the DWARF standard,
11513 these DIEs are identified by the fact that they have no byte_size
11514 attribute, and a declaration attribute. */
11515 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
11516 || !die_is_declaration (die
, cu
))
11517 new_symbol (die
, type
, cu
);
11520 /* Given a DW_AT_enumeration_type die, set its type. We do not
11521 complete the type's fields yet, or create any symbols. */
11523 static struct type
*
11524 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11526 struct objfile
*objfile
= cu
->objfile
;
11528 struct attribute
*attr
;
11531 /* If the definition of this type lives in .debug_types, read that type.
11532 Don't follow DW_AT_specification though, that will take us back up
11533 the chain and we want to go down. */
11534 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
11537 struct dwarf2_cu
*type_cu
= cu
;
11538 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11540 type
= read_type_die (type_die
, type_cu
);
11542 /* TYPE_CU may not be the same as CU.
11543 Ensure TYPE is recorded in CU's type_hash table. */
11544 return set_die_type (die
, type
, cu
);
11547 type
= alloc_type (objfile
);
11549 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
11550 name
= dwarf2_full_name (NULL
, die
, cu
);
11552 TYPE_TAG_NAME (type
) = (char *) name
;
11554 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11557 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11561 TYPE_LENGTH (type
) = 0;
11564 /* The enumeration DIE can be incomplete. In Ada, any type can be
11565 declared as private in the package spec, and then defined only
11566 inside the package body. Such types are known as Taft Amendment
11567 Types. When another package uses such a type, an incomplete DIE
11568 may be generated by the compiler. */
11569 if (die_is_declaration (die
, cu
))
11570 TYPE_STUB (type
) = 1;
11572 return set_die_type (die
, type
, cu
);
11575 /* Given a pointer to a die which begins an enumeration, process all
11576 the dies that define the members of the enumeration, and create the
11577 symbol for the enumeration type.
11579 NOTE: We reverse the order of the element list. */
11582 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11584 struct type
*this_type
;
11586 this_type
= get_die_type (die
, cu
);
11587 if (this_type
== NULL
)
11588 this_type
= read_enumeration_type (die
, cu
);
11590 if (die
->child
!= NULL
)
11592 struct die_info
*child_die
;
11593 struct symbol
*sym
;
11594 struct field
*fields
= NULL
;
11595 int num_fields
= 0;
11596 int unsigned_enum
= 1;
11601 child_die
= die
->child
;
11602 while (child_die
&& child_die
->tag
)
11604 if (child_die
->tag
!= DW_TAG_enumerator
)
11606 process_die (child_die
, cu
);
11610 name
= dwarf2_name (child_die
, cu
);
11613 sym
= new_symbol (child_die
, this_type
, cu
);
11614 if (SYMBOL_VALUE (sym
) < 0)
11619 else if ((mask
& SYMBOL_VALUE (sym
)) != 0)
11622 mask
|= SYMBOL_VALUE (sym
);
11624 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
11626 fields
= (struct field
*)
11628 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
11629 * sizeof (struct field
));
11632 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
11633 FIELD_TYPE (fields
[num_fields
]) = NULL
;
11634 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
11635 FIELD_BITSIZE (fields
[num_fields
]) = 0;
11641 child_die
= sibling_die (child_die
);
11646 TYPE_NFIELDS (this_type
) = num_fields
;
11647 TYPE_FIELDS (this_type
) = (struct field
*)
11648 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
11649 memcpy (TYPE_FIELDS (this_type
), fields
,
11650 sizeof (struct field
) * num_fields
);
11654 TYPE_UNSIGNED (this_type
) = 1;
11656 TYPE_FLAG_ENUM (this_type
) = 1;
11659 /* If we are reading an enum from a .debug_types unit, and the enum
11660 is a declaration, and the enum is not the signatured type in the
11661 unit, then we do not want to add a symbol for it. Adding a
11662 symbol would in some cases obscure the true definition of the
11663 enum, giving users an incomplete type when the definition is
11664 actually available. Note that we do not want to do this for all
11665 enums which are just declarations, because C++0x allows forward
11666 enum declarations. */
11667 if (cu
->per_cu
->is_debug_types
11668 && die_is_declaration (die
, cu
))
11670 struct signatured_type
*sig_type
;
11673 = lookup_signatured_type_at_offset (dwarf2_per_objfile
->objfile
,
11674 cu
->per_cu
->info_or_types_section
,
11675 cu
->per_cu
->offset
);
11676 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
11677 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
11681 new_symbol (die
, this_type
, cu
);
11684 /* Extract all information from a DW_TAG_array_type DIE and put it in
11685 the DIE's type field. For now, this only handles one dimensional
11688 static struct type
*
11689 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11691 struct objfile
*objfile
= cu
->objfile
;
11692 struct die_info
*child_die
;
11694 struct type
*element_type
, *range_type
, *index_type
;
11695 struct type
**range_types
= NULL
;
11696 struct attribute
*attr
;
11698 struct cleanup
*back_to
;
11701 element_type
= die_type (die
, cu
);
11703 /* The die_type call above may have already set the type for this DIE. */
11704 type
= get_die_type (die
, cu
);
11708 /* Irix 6.2 native cc creates array types without children for
11709 arrays with unspecified length. */
11710 if (die
->child
== NULL
)
11712 index_type
= objfile_type (objfile
)->builtin_int
;
11713 range_type
= create_range_type (NULL
, index_type
, 0, -1);
11714 type
= create_array_type (NULL
, element_type
, range_type
);
11715 return set_die_type (die
, type
, cu
);
11718 back_to
= make_cleanup (null_cleanup
, NULL
);
11719 child_die
= die
->child
;
11720 while (child_die
&& child_die
->tag
)
11722 if (child_die
->tag
== DW_TAG_subrange_type
)
11724 struct type
*child_type
= read_type_die (child_die
, cu
);
11726 if (child_type
!= NULL
)
11728 /* The range type was succesfully read. Save it for the
11729 array type creation. */
11730 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
11732 range_types
= (struct type
**)
11733 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
11734 * sizeof (struct type
*));
11736 make_cleanup (free_current_contents
, &range_types
);
11738 range_types
[ndim
++] = child_type
;
11741 child_die
= sibling_die (child_die
);
11744 /* Dwarf2 dimensions are output from left to right, create the
11745 necessary array types in backwards order. */
11747 type
= element_type
;
11749 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
11754 type
= create_array_type (NULL
, type
, range_types
[i
++]);
11759 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
11762 /* Understand Dwarf2 support for vector types (like they occur on
11763 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
11764 array type. This is not part of the Dwarf2/3 standard yet, but a
11765 custom vendor extension. The main difference between a regular
11766 array and the vector variant is that vectors are passed by value
11768 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
11770 make_vector_type (type
);
11772 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
11773 implementation may choose to implement triple vectors using this
11775 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11778 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
11779 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11781 complaint (&symfile_complaints
,
11782 _("DW_AT_byte_size for array type smaller "
11783 "than the total size of elements"));
11786 name
= dwarf2_name (die
, cu
);
11788 TYPE_NAME (type
) = name
;
11790 /* Install the type in the die. */
11791 set_die_type (die
, type
, cu
);
11793 /* set_die_type should be already done. */
11794 set_descriptive_type (type
, die
, cu
);
11796 do_cleanups (back_to
);
11801 static enum dwarf_array_dim_ordering
11802 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
11804 struct attribute
*attr
;
11806 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
11808 if (attr
) return DW_SND (attr
);
11810 /* GNU F77 is a special case, as at 08/2004 array type info is the
11811 opposite order to the dwarf2 specification, but data is still
11812 laid out as per normal fortran.
11814 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
11815 version checking. */
11817 if (cu
->language
== language_fortran
11818 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
11820 return DW_ORD_row_major
;
11823 switch (cu
->language_defn
->la_array_ordering
)
11825 case array_column_major
:
11826 return DW_ORD_col_major
;
11827 case array_row_major
:
11829 return DW_ORD_row_major
;
11833 /* Extract all information from a DW_TAG_set_type DIE and put it in
11834 the DIE's type field. */
11836 static struct type
*
11837 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11839 struct type
*domain_type
, *set_type
;
11840 struct attribute
*attr
;
11842 domain_type
= die_type (die
, cu
);
11844 /* The die_type call above may have already set the type for this DIE. */
11845 set_type
= get_die_type (die
, cu
);
11849 set_type
= create_set_type (NULL
, domain_type
);
11851 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11853 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
11855 return set_die_type (die
, set_type
, cu
);
11858 /* A helper for read_common_block that creates a locexpr baton.
11859 SYM is the symbol which we are marking as computed.
11860 COMMON_DIE is the DIE for the common block.
11861 COMMON_LOC is the location expression attribute for the common
11863 MEMBER_LOC is the location expression attribute for the particular
11864 member of the common block that we are processing.
11865 CU is the CU from which the above come. */
11868 mark_common_block_symbol_computed (struct symbol
*sym
,
11869 struct die_info
*common_die
,
11870 struct attribute
*common_loc
,
11871 struct attribute
*member_loc
,
11872 struct dwarf2_cu
*cu
)
11874 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11875 struct dwarf2_locexpr_baton
*baton
;
11877 unsigned int cu_off
;
11878 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
11879 LONGEST offset
= 0;
11881 gdb_assert (common_loc
&& member_loc
);
11882 gdb_assert (attr_form_is_block (common_loc
));
11883 gdb_assert (attr_form_is_block (member_loc
)
11884 || attr_form_is_constant (member_loc
));
11886 baton
= obstack_alloc (&objfile
->objfile_obstack
,
11887 sizeof (struct dwarf2_locexpr_baton
));
11888 baton
->per_cu
= cu
->per_cu
;
11889 gdb_assert (baton
->per_cu
);
11891 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
11893 if (attr_form_is_constant (member_loc
))
11895 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
11896 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
11899 baton
->size
+= DW_BLOCK (member_loc
)->size
;
11901 ptr
= obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
11904 *ptr
++ = DW_OP_call4
;
11905 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
11906 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
11909 if (attr_form_is_constant (member_loc
))
11911 *ptr
++ = DW_OP_addr
;
11912 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
11913 ptr
+= cu
->header
.addr_size
;
11917 /* We have to copy the data here, because DW_OP_call4 will only
11918 use a DW_AT_location attribute. */
11919 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
11920 ptr
+= DW_BLOCK (member_loc
)->size
;
11923 *ptr
++ = DW_OP_plus
;
11924 gdb_assert (ptr
- baton
->data
== baton
->size
);
11926 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11927 SYMBOL_LOCATION_BATON (sym
) = baton
;
11928 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
11931 /* Create appropriate locally-scoped variables for all the
11932 DW_TAG_common_block entries. Also create a struct common_block
11933 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
11934 is used to sepate the common blocks name namespace from regular
11938 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
11940 struct attribute
*attr
;
11942 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
11945 /* Support the .debug_loc offsets. */
11946 if (attr_form_is_block (attr
))
11950 else if (attr_form_is_section_offset (attr
))
11952 dwarf2_complex_location_expr_complaint ();
11957 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
11958 "common block member");
11963 if (die
->child
!= NULL
)
11965 struct objfile
*objfile
= cu
->objfile
;
11966 struct die_info
*child_die
;
11967 size_t n_entries
= 0, size
;
11968 struct common_block
*common_block
;
11969 struct symbol
*sym
;
11971 for (child_die
= die
->child
;
11972 child_die
&& child_die
->tag
;
11973 child_die
= sibling_die (child_die
))
11976 size
= (sizeof (struct common_block
)
11977 + (n_entries
- 1) * sizeof (struct symbol
*));
11978 common_block
= obstack_alloc (&objfile
->objfile_obstack
, size
);
11979 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
11980 common_block
->n_entries
= 0;
11982 for (child_die
= die
->child
;
11983 child_die
&& child_die
->tag
;
11984 child_die
= sibling_die (child_die
))
11986 /* Create the symbol in the DW_TAG_common_block block in the current
11988 sym
= new_symbol (child_die
, NULL
, cu
);
11991 struct attribute
*member_loc
;
11993 common_block
->contents
[common_block
->n_entries
++] = sym
;
11995 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
11999 /* GDB has handled this for a long time, but it is
12000 not specified by DWARF. It seems to have been
12001 emitted by gfortran at least as recently as:
12002 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
12003 complaint (&symfile_complaints
,
12004 _("Variable in common block has "
12005 "DW_AT_data_member_location "
12006 "- DIE at 0x%x [in module %s]"),
12007 child_die
->offset
.sect_off
, cu
->objfile
->name
);
12009 if (attr_form_is_section_offset (member_loc
))
12010 dwarf2_complex_location_expr_complaint ();
12011 else if (attr_form_is_constant (member_loc
)
12012 || attr_form_is_block (member_loc
))
12015 mark_common_block_symbol_computed (sym
, die
, attr
,
12019 dwarf2_complex_location_expr_complaint ();
12024 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
12025 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
12029 /* Create a type for a C++ namespace. */
12031 static struct type
*
12032 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12034 struct objfile
*objfile
= cu
->objfile
;
12035 const char *previous_prefix
, *name
;
12039 /* For extensions, reuse the type of the original namespace. */
12040 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
12042 struct die_info
*ext_die
;
12043 struct dwarf2_cu
*ext_cu
= cu
;
12045 ext_die
= dwarf2_extension (die
, &ext_cu
);
12046 type
= read_type_die (ext_die
, ext_cu
);
12048 /* EXT_CU may not be the same as CU.
12049 Ensure TYPE is recorded in CU's type_hash table. */
12050 return set_die_type (die
, type
, cu
);
12053 name
= namespace_name (die
, &is_anonymous
, cu
);
12055 /* Now build the name of the current namespace. */
12057 previous_prefix
= determine_prefix (die
, cu
);
12058 if (previous_prefix
[0] != '\0')
12059 name
= typename_concat (&objfile
->objfile_obstack
,
12060 previous_prefix
, name
, 0, cu
);
12062 /* Create the type. */
12063 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
12065 TYPE_NAME (type
) = (char *) name
;
12066 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
12068 return set_die_type (die
, type
, cu
);
12071 /* Read a C++ namespace. */
12074 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
12076 struct objfile
*objfile
= cu
->objfile
;
12079 /* Add a symbol associated to this if we haven't seen the namespace
12080 before. Also, add a using directive if it's an anonymous
12083 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
12087 type
= read_type_die (die
, cu
);
12088 new_symbol (die
, type
, cu
);
12090 namespace_name (die
, &is_anonymous
, cu
);
12093 const char *previous_prefix
= determine_prefix (die
, cu
);
12095 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
12096 NULL
, NULL
, &objfile
->objfile_obstack
);
12100 if (die
->child
!= NULL
)
12102 struct die_info
*child_die
= die
->child
;
12104 while (child_die
&& child_die
->tag
)
12106 process_die (child_die
, cu
);
12107 child_die
= sibling_die (child_die
);
12112 /* Read a Fortran module as type. This DIE can be only a declaration used for
12113 imported module. Still we need that type as local Fortran "use ... only"
12114 declaration imports depend on the created type in determine_prefix. */
12116 static struct type
*
12117 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12119 struct objfile
*objfile
= cu
->objfile
;
12120 const char *module_name
;
12123 module_name
= dwarf2_name (die
, cu
);
12125 complaint (&symfile_complaints
,
12126 _("DW_TAG_module has no name, offset 0x%x"),
12127 die
->offset
.sect_off
);
12128 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
12130 /* determine_prefix uses TYPE_TAG_NAME. */
12131 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
12133 return set_die_type (die
, type
, cu
);
12136 /* Read a Fortran module. */
12139 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
12141 struct die_info
*child_die
= die
->child
;
12143 while (child_die
&& child_die
->tag
)
12145 process_die (child_die
, cu
);
12146 child_die
= sibling_die (child_die
);
12150 /* Return the name of the namespace represented by DIE. Set
12151 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
12154 static const char *
12155 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
12157 struct die_info
*current_die
;
12158 const char *name
= NULL
;
12160 /* Loop through the extensions until we find a name. */
12162 for (current_die
= die
;
12163 current_die
!= NULL
;
12164 current_die
= dwarf2_extension (die
, &cu
))
12166 name
= dwarf2_name (current_die
, cu
);
12171 /* Is it an anonymous namespace? */
12173 *is_anonymous
= (name
== NULL
);
12175 name
= CP_ANONYMOUS_NAMESPACE_STR
;
12180 /* Extract all information from a DW_TAG_pointer_type DIE and add to
12181 the user defined type vector. */
12183 static struct type
*
12184 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12186 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
12187 struct comp_unit_head
*cu_header
= &cu
->header
;
12189 struct attribute
*attr_byte_size
;
12190 struct attribute
*attr_address_class
;
12191 int byte_size
, addr_class
;
12192 struct type
*target_type
;
12194 target_type
= die_type (die
, cu
);
12196 /* The die_type call above may have already set the type for this DIE. */
12197 type
= get_die_type (die
, cu
);
12201 type
= lookup_pointer_type (target_type
);
12203 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12204 if (attr_byte_size
)
12205 byte_size
= DW_UNSND (attr_byte_size
);
12207 byte_size
= cu_header
->addr_size
;
12209 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
12210 if (attr_address_class
)
12211 addr_class
= DW_UNSND (attr_address_class
);
12213 addr_class
= DW_ADDR_none
;
12215 /* If the pointer size or address class is different than the
12216 default, create a type variant marked as such and set the
12217 length accordingly. */
12218 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
12220 if (gdbarch_address_class_type_flags_p (gdbarch
))
12224 type_flags
= gdbarch_address_class_type_flags
12225 (gdbarch
, byte_size
, addr_class
);
12226 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
12228 type
= make_type_with_address_space (type
, type_flags
);
12230 else if (TYPE_LENGTH (type
) != byte_size
)
12232 complaint (&symfile_complaints
,
12233 _("invalid pointer size %d"), byte_size
);
12237 /* Should we also complain about unhandled address classes? */
12241 TYPE_LENGTH (type
) = byte_size
;
12242 return set_die_type (die
, type
, cu
);
12245 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
12246 the user defined type vector. */
12248 static struct type
*
12249 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12252 struct type
*to_type
;
12253 struct type
*domain
;
12255 to_type
= die_type (die
, cu
);
12256 domain
= die_containing_type (die
, cu
);
12258 /* The calls above may have already set the type for this DIE. */
12259 type
= get_die_type (die
, cu
);
12263 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
12264 type
= lookup_methodptr_type (to_type
);
12266 type
= lookup_memberptr_type (to_type
, domain
);
12268 return set_die_type (die
, type
, cu
);
12271 /* Extract all information from a DW_TAG_reference_type DIE and add to
12272 the user defined type vector. */
12274 static struct type
*
12275 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12277 struct comp_unit_head
*cu_header
= &cu
->header
;
12278 struct type
*type
, *target_type
;
12279 struct attribute
*attr
;
12281 target_type
= die_type (die
, cu
);
12283 /* The die_type call above may have already set the type for this DIE. */
12284 type
= get_die_type (die
, cu
);
12288 type
= lookup_reference_type (target_type
);
12289 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12292 TYPE_LENGTH (type
) = DW_UNSND (attr
);
12296 TYPE_LENGTH (type
) = cu_header
->addr_size
;
12298 return set_die_type (die
, type
, cu
);
12301 static struct type
*
12302 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12304 struct type
*base_type
, *cv_type
;
12306 base_type
= die_type (die
, cu
);
12308 /* The die_type call above may have already set the type for this DIE. */
12309 cv_type
= get_die_type (die
, cu
);
12313 /* In case the const qualifier is applied to an array type, the element type
12314 is so qualified, not the array type (section 6.7.3 of C99). */
12315 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
12317 struct type
*el_type
, *inner_array
;
12319 base_type
= copy_type (base_type
);
12320 inner_array
= base_type
;
12322 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
12324 TYPE_TARGET_TYPE (inner_array
) =
12325 copy_type (TYPE_TARGET_TYPE (inner_array
));
12326 inner_array
= TYPE_TARGET_TYPE (inner_array
);
12329 el_type
= TYPE_TARGET_TYPE (inner_array
);
12330 TYPE_TARGET_TYPE (inner_array
) =
12331 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
12333 return set_die_type (die
, base_type
, cu
);
12336 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
12337 return set_die_type (die
, cv_type
, cu
);
12340 static struct type
*
12341 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12343 struct type
*base_type
, *cv_type
;
12345 base_type
= die_type (die
, cu
);
12347 /* The die_type call above may have already set the type for this DIE. */
12348 cv_type
= get_die_type (die
, cu
);
12352 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
12353 return set_die_type (die
, cv_type
, cu
);
12356 /* Handle DW_TAG_restrict_type. */
12358 static struct type
*
12359 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12361 struct type
*base_type
, *cv_type
;
12363 base_type
= die_type (die
, cu
);
12365 /* The die_type call above may have already set the type for this DIE. */
12366 cv_type
= get_die_type (die
, cu
);
12370 cv_type
= make_restrict_type (base_type
);
12371 return set_die_type (die
, cv_type
, cu
);
12374 /* Extract all information from a DW_TAG_string_type DIE and add to
12375 the user defined type vector. It isn't really a user defined type,
12376 but it behaves like one, with other DIE's using an AT_user_def_type
12377 attribute to reference it. */
12379 static struct type
*
12380 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12382 struct objfile
*objfile
= cu
->objfile
;
12383 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12384 struct type
*type
, *range_type
, *index_type
, *char_type
;
12385 struct attribute
*attr
;
12386 unsigned int length
;
12388 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
12391 length
= DW_UNSND (attr
);
12395 /* Check for the DW_AT_byte_size attribute. */
12396 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12399 length
= DW_UNSND (attr
);
12407 index_type
= objfile_type (objfile
)->builtin_int
;
12408 range_type
= create_range_type (NULL
, index_type
, 1, length
);
12409 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
12410 type
= create_string_type (NULL
, char_type
, range_type
);
12412 return set_die_type (die
, type
, cu
);
12415 /* Handle DIES due to C code like:
12419 int (*funcp)(int a, long l);
12423 ('funcp' generates a DW_TAG_subroutine_type DIE). */
12425 static struct type
*
12426 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12428 struct objfile
*objfile
= cu
->objfile
;
12429 struct type
*type
; /* Type that this function returns. */
12430 struct type
*ftype
; /* Function that returns above type. */
12431 struct attribute
*attr
;
12433 type
= die_type (die
, cu
);
12435 /* The die_type call above may have already set the type for this DIE. */
12436 ftype
= get_die_type (die
, cu
);
12440 ftype
= lookup_function_type (type
);
12442 /* All functions in C++, Pascal and Java have prototypes. */
12443 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
12444 if ((attr
&& (DW_UNSND (attr
) != 0))
12445 || cu
->language
== language_cplus
12446 || cu
->language
== language_java
12447 || cu
->language
== language_pascal
)
12448 TYPE_PROTOTYPED (ftype
) = 1;
12449 else if (producer_is_realview (cu
->producer
))
12450 /* RealView does not emit DW_AT_prototyped. We can not
12451 distinguish prototyped and unprototyped functions; default to
12452 prototyped, since that is more common in modern code (and
12453 RealView warns about unprototyped functions). */
12454 TYPE_PROTOTYPED (ftype
) = 1;
12456 /* Store the calling convention in the type if it's available in
12457 the subroutine die. Otherwise set the calling convention to
12458 the default value DW_CC_normal. */
12459 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
12461 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
12462 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
12463 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
12465 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
12467 /* We need to add the subroutine type to the die immediately so
12468 we don't infinitely recurse when dealing with parameters
12469 declared as the same subroutine type. */
12470 set_die_type (die
, ftype
, cu
);
12472 if (die
->child
!= NULL
)
12474 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
12475 struct die_info
*child_die
;
12476 int nparams
, iparams
;
12478 /* Count the number of parameters.
12479 FIXME: GDB currently ignores vararg functions, but knows about
12480 vararg member functions. */
12482 child_die
= die
->child
;
12483 while (child_die
&& child_die
->tag
)
12485 if (child_die
->tag
== DW_TAG_formal_parameter
)
12487 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
12488 TYPE_VARARGS (ftype
) = 1;
12489 child_die
= sibling_die (child_die
);
12492 /* Allocate storage for parameters and fill them in. */
12493 TYPE_NFIELDS (ftype
) = nparams
;
12494 TYPE_FIELDS (ftype
) = (struct field
*)
12495 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
12497 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
12498 even if we error out during the parameters reading below. */
12499 for (iparams
= 0; iparams
< nparams
; iparams
++)
12500 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
12503 child_die
= die
->child
;
12504 while (child_die
&& child_die
->tag
)
12506 if (child_die
->tag
== DW_TAG_formal_parameter
)
12508 struct type
*arg_type
;
12510 /* DWARF version 2 has no clean way to discern C++
12511 static and non-static member functions. G++ helps
12512 GDB by marking the first parameter for non-static
12513 member functions (which is the this pointer) as
12514 artificial. We pass this information to
12515 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
12517 DWARF version 3 added DW_AT_object_pointer, which GCC
12518 4.5 does not yet generate. */
12519 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
12521 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
12524 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
12526 /* GCC/43521: In java, the formal parameter
12527 "this" is sometimes not marked with DW_AT_artificial. */
12528 if (cu
->language
== language_java
)
12530 const char *name
= dwarf2_name (child_die
, cu
);
12532 if (name
&& !strcmp (name
, "this"))
12533 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
12536 arg_type
= die_type (child_die
, cu
);
12538 /* RealView does not mark THIS as const, which the testsuite
12539 expects. GCC marks THIS as const in method definitions,
12540 but not in the class specifications (GCC PR 43053). */
12541 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
12542 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
12545 struct dwarf2_cu
*arg_cu
= cu
;
12546 const char *name
= dwarf2_name (child_die
, cu
);
12548 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
12551 /* If the compiler emits this, use it. */
12552 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
12555 else if (name
&& strcmp (name
, "this") == 0)
12556 /* Function definitions will have the argument names. */
12558 else if (name
== NULL
&& iparams
== 0)
12559 /* Declarations may not have the names, so like
12560 elsewhere in GDB, assume an artificial first
12561 argument is "this". */
12565 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
12569 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
12572 child_die
= sibling_die (child_die
);
12579 static struct type
*
12580 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
12582 struct objfile
*objfile
= cu
->objfile
;
12583 const char *name
= NULL
;
12584 struct type
*this_type
, *target_type
;
12586 name
= dwarf2_full_name (NULL
, die
, cu
);
12587 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
12588 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
12589 TYPE_NAME (this_type
) = (char *) name
;
12590 set_die_type (die
, this_type
, cu
);
12591 target_type
= die_type (die
, cu
);
12592 if (target_type
!= this_type
)
12593 TYPE_TARGET_TYPE (this_type
) = target_type
;
12596 /* Self-referential typedefs are, it seems, not allowed by the DWARF
12597 spec and cause infinite loops in GDB. */
12598 complaint (&symfile_complaints
,
12599 _("Self-referential DW_TAG_typedef "
12600 "- DIE at 0x%x [in module %s]"),
12601 die
->offset
.sect_off
, objfile
->name
);
12602 TYPE_TARGET_TYPE (this_type
) = NULL
;
12607 /* Find a representation of a given base type and install
12608 it in the TYPE field of the die. */
12610 static struct type
*
12611 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12613 struct objfile
*objfile
= cu
->objfile
;
12615 struct attribute
*attr
;
12616 int encoding
= 0, size
= 0;
12618 enum type_code code
= TYPE_CODE_INT
;
12619 int type_flags
= 0;
12620 struct type
*target_type
= NULL
;
12622 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
12625 encoding
= DW_UNSND (attr
);
12627 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12630 size
= DW_UNSND (attr
);
12632 name
= dwarf2_name (die
, cu
);
12635 complaint (&symfile_complaints
,
12636 _("DW_AT_name missing from DW_TAG_base_type"));
12641 case DW_ATE_address
:
12642 /* Turn DW_ATE_address into a void * pointer. */
12643 code
= TYPE_CODE_PTR
;
12644 type_flags
|= TYPE_FLAG_UNSIGNED
;
12645 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
12647 case DW_ATE_boolean
:
12648 code
= TYPE_CODE_BOOL
;
12649 type_flags
|= TYPE_FLAG_UNSIGNED
;
12651 case DW_ATE_complex_float
:
12652 code
= TYPE_CODE_COMPLEX
;
12653 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
12655 case DW_ATE_decimal_float
:
12656 code
= TYPE_CODE_DECFLOAT
;
12659 code
= TYPE_CODE_FLT
;
12661 case DW_ATE_signed
:
12663 case DW_ATE_unsigned
:
12664 type_flags
|= TYPE_FLAG_UNSIGNED
;
12665 if (cu
->language
== language_fortran
12667 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
12668 code
= TYPE_CODE_CHAR
;
12670 case DW_ATE_signed_char
:
12671 if (cu
->language
== language_ada
|| cu
->language
== language_m2
12672 || cu
->language
== language_pascal
12673 || cu
->language
== language_fortran
)
12674 code
= TYPE_CODE_CHAR
;
12676 case DW_ATE_unsigned_char
:
12677 if (cu
->language
== language_ada
|| cu
->language
== language_m2
12678 || cu
->language
== language_pascal
12679 || cu
->language
== language_fortran
)
12680 code
= TYPE_CODE_CHAR
;
12681 type_flags
|= TYPE_FLAG_UNSIGNED
;
12684 /* We just treat this as an integer and then recognize the
12685 type by name elsewhere. */
12689 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
12690 dwarf_type_encoding_name (encoding
));
12694 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
12695 TYPE_NAME (type
) = name
;
12696 TYPE_TARGET_TYPE (type
) = target_type
;
12698 if (name
&& strcmp (name
, "char") == 0)
12699 TYPE_NOSIGN (type
) = 1;
12701 return set_die_type (die
, type
, cu
);
12704 /* Read the given DW_AT_subrange DIE. */
12706 static struct type
*
12707 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12709 struct type
*base_type
;
12710 struct type
*range_type
;
12711 struct attribute
*attr
;
12713 int low_default_is_valid
;
12715 LONGEST negative_mask
;
12717 base_type
= die_type (die
, cu
);
12718 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
12719 check_typedef (base_type
);
12721 /* The die_type call above may have already set the type for this DIE. */
12722 range_type
= get_die_type (die
, cu
);
12726 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
12727 omitting DW_AT_lower_bound. */
12728 switch (cu
->language
)
12731 case language_cplus
:
12733 low_default_is_valid
= 1;
12735 case language_fortran
:
12737 low_default_is_valid
= 1;
12740 case language_java
:
12741 case language_objc
:
12743 low_default_is_valid
= (cu
->header
.version
>= 4);
12747 case language_pascal
:
12749 low_default_is_valid
= (cu
->header
.version
>= 4);
12753 low_default_is_valid
= 0;
12757 /* FIXME: For variable sized arrays either of these could be
12758 a variable rather than a constant value. We'll allow it,
12759 but we don't know how to handle it. */
12760 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
12762 low
= dwarf2_get_attr_constant_value (attr
, low
);
12763 else if (!low_default_is_valid
)
12764 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
12765 "- DIE at 0x%x [in module %s]"),
12766 die
->offset
.sect_off
, cu
->objfile
->name
);
12768 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
12771 if (attr_form_is_block (attr
) || is_ref_attr (attr
))
12773 /* GCC encodes arrays with unspecified or dynamic length
12774 with a DW_FORM_block1 attribute or a reference attribute.
12775 FIXME: GDB does not yet know how to handle dynamic
12776 arrays properly, treat them as arrays with unspecified
12779 FIXME: jimb/2003-09-22: GDB does not really know
12780 how to handle arrays of unspecified length
12781 either; we just represent them as zero-length
12782 arrays. Choose an appropriate upper bound given
12783 the lower bound we've computed above. */
12787 high
= dwarf2_get_attr_constant_value (attr
, 1);
12791 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
12794 int count
= dwarf2_get_attr_constant_value (attr
, 1);
12795 high
= low
+ count
- 1;
12799 /* Unspecified array length. */
12804 /* Dwarf-2 specifications explicitly allows to create subrange types
12805 without specifying a base type.
12806 In that case, the base type must be set to the type of
12807 the lower bound, upper bound or count, in that order, if any of these
12808 three attributes references an object that has a type.
12809 If no base type is found, the Dwarf-2 specifications say that
12810 a signed integer type of size equal to the size of an address should
12812 For the following C code: `extern char gdb_int [];'
12813 GCC produces an empty range DIE.
12814 FIXME: muller/2010-05-28: Possible references to object for low bound,
12815 high bound or count are not yet handled by this code. */
12816 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
12818 struct objfile
*objfile
= cu
->objfile
;
12819 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12820 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
12821 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
12823 /* Test "int", "long int", and "long long int" objfile types,
12824 and select the first one having a size above or equal to the
12825 architecture address size. */
12826 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12827 base_type
= int_type
;
12830 int_type
= objfile_type (objfile
)->builtin_long
;
12831 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12832 base_type
= int_type
;
12835 int_type
= objfile_type (objfile
)->builtin_long_long
;
12836 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12837 base_type
= int_type
;
12843 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
12844 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
12845 low
|= negative_mask
;
12846 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
12847 high
|= negative_mask
;
12849 range_type
= create_range_type (NULL
, base_type
, low
, high
);
12851 /* Mark arrays with dynamic length at least as an array of unspecified
12852 length. GDB could check the boundary but before it gets implemented at
12853 least allow accessing the array elements. */
12854 if (attr
&& attr_form_is_block (attr
))
12855 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
12857 /* Ada expects an empty array on no boundary attributes. */
12858 if (attr
== NULL
&& cu
->language
!= language_ada
)
12859 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
12861 name
= dwarf2_name (die
, cu
);
12863 TYPE_NAME (range_type
) = name
;
12865 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12867 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
12869 set_die_type (die
, range_type
, cu
);
12871 /* set_die_type should be already done. */
12872 set_descriptive_type (range_type
, die
, cu
);
12877 static struct type
*
12878 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12882 /* For now, we only support the C meaning of an unspecified type: void. */
12884 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
12885 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
12887 return set_die_type (die
, type
, cu
);
12890 /* Read a single die and all its descendents. Set the die's sibling
12891 field to NULL; set other fields in the die correctly, and set all
12892 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
12893 location of the info_ptr after reading all of those dies. PARENT
12894 is the parent of the die in question. */
12896 static struct die_info
*
12897 read_die_and_children (const struct die_reader_specs
*reader
,
12898 gdb_byte
*info_ptr
,
12899 gdb_byte
**new_info_ptr
,
12900 struct die_info
*parent
)
12902 struct die_info
*die
;
12906 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
12909 *new_info_ptr
= cur_ptr
;
12912 store_in_ref_table (die
, reader
->cu
);
12915 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
12919 *new_info_ptr
= cur_ptr
;
12922 die
->sibling
= NULL
;
12923 die
->parent
= parent
;
12927 /* Read a die, all of its descendents, and all of its siblings; set
12928 all of the fields of all of the dies correctly. Arguments are as
12929 in read_die_and_children. */
12931 static struct die_info
*
12932 read_die_and_siblings (const struct die_reader_specs
*reader
,
12933 gdb_byte
*info_ptr
,
12934 gdb_byte
**new_info_ptr
,
12935 struct die_info
*parent
)
12937 struct die_info
*first_die
, *last_sibling
;
12940 cur_ptr
= info_ptr
;
12941 first_die
= last_sibling
= NULL
;
12945 struct die_info
*die
12946 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
12950 *new_info_ptr
= cur_ptr
;
12957 last_sibling
->sibling
= die
;
12959 last_sibling
= die
;
12963 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
12965 The caller is responsible for filling in the extra attributes
12966 and updating (*DIEP)->num_attrs.
12967 Set DIEP to point to a newly allocated die with its information,
12968 except for its child, sibling, and parent fields.
12969 Set HAS_CHILDREN to tell whether the die has children or not. */
12972 read_full_die_1 (const struct die_reader_specs
*reader
,
12973 struct die_info
**diep
, gdb_byte
*info_ptr
,
12974 int *has_children
, int num_extra_attrs
)
12976 unsigned int abbrev_number
, bytes_read
, i
;
12977 sect_offset offset
;
12978 struct abbrev_info
*abbrev
;
12979 struct die_info
*die
;
12980 struct dwarf2_cu
*cu
= reader
->cu
;
12981 bfd
*abfd
= reader
->abfd
;
12983 offset
.sect_off
= info_ptr
- reader
->buffer
;
12984 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
12985 info_ptr
+= bytes_read
;
12986 if (!abbrev_number
)
12993 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
12995 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
12997 bfd_get_filename (abfd
));
12999 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
13000 die
->offset
= offset
;
13001 die
->tag
= abbrev
->tag
;
13002 die
->abbrev
= abbrev_number
;
13004 /* Make the result usable.
13005 The caller needs to update num_attrs after adding the extra
13007 die
->num_attrs
= abbrev
->num_attrs
;
13009 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
13010 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
13014 *has_children
= abbrev
->has_children
;
13018 /* Read a die and all its attributes.
13019 Set DIEP to point to a newly allocated die with its information,
13020 except for its child, sibling, and parent fields.
13021 Set HAS_CHILDREN to tell whether the die has children or not. */
13024 read_full_die (const struct die_reader_specs
*reader
,
13025 struct die_info
**diep
, gdb_byte
*info_ptr
,
13028 return read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
13031 /* Abbreviation tables.
13033 In DWARF version 2, the description of the debugging information is
13034 stored in a separate .debug_abbrev section. Before we read any
13035 dies from a section we read in all abbreviations and install them
13036 in a hash table. */
13038 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
13040 static struct abbrev_info
*
13041 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
13043 struct abbrev_info
*abbrev
;
13045 abbrev
= (struct abbrev_info
*)
13046 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
13047 memset (abbrev
, 0, sizeof (struct abbrev_info
));
13051 /* Add an abbreviation to the table. */
13054 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
13055 unsigned int abbrev_number
,
13056 struct abbrev_info
*abbrev
)
13058 unsigned int hash_number
;
13060 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
13061 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
13062 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
13065 /* Look up an abbrev in the table.
13066 Returns NULL if the abbrev is not found. */
13068 static struct abbrev_info
*
13069 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
13070 unsigned int abbrev_number
)
13072 unsigned int hash_number
;
13073 struct abbrev_info
*abbrev
;
13075 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
13076 abbrev
= abbrev_table
->abbrevs
[hash_number
];
13080 if (abbrev
->number
== abbrev_number
)
13082 abbrev
= abbrev
->next
;
13087 /* Read in an abbrev table. */
13089 static struct abbrev_table
*
13090 abbrev_table_read_table (struct dwarf2_section_info
*section
,
13091 sect_offset offset
)
13093 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13094 bfd
*abfd
= section
->asection
->owner
;
13095 struct abbrev_table
*abbrev_table
;
13096 gdb_byte
*abbrev_ptr
;
13097 struct abbrev_info
*cur_abbrev
;
13098 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
13099 unsigned int abbrev_form
;
13100 struct attr_abbrev
*cur_attrs
;
13101 unsigned int allocated_attrs
;
13103 abbrev_table
= XMALLOC (struct abbrev_table
);
13104 abbrev_table
->offset
= offset
;
13105 obstack_init (&abbrev_table
->abbrev_obstack
);
13106 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
13108 * sizeof (struct abbrev_info
*)));
13109 memset (abbrev_table
->abbrevs
, 0,
13110 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
13112 dwarf2_read_section (objfile
, section
);
13113 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
13114 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13115 abbrev_ptr
+= bytes_read
;
13117 allocated_attrs
= ATTR_ALLOC_CHUNK
;
13118 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
13120 /* Loop until we reach an abbrev number of 0. */
13121 while (abbrev_number
)
13123 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
13125 /* read in abbrev header */
13126 cur_abbrev
->number
= abbrev_number
;
13127 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13128 abbrev_ptr
+= bytes_read
;
13129 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
13132 /* now read in declarations */
13133 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13134 abbrev_ptr
+= bytes_read
;
13135 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13136 abbrev_ptr
+= bytes_read
;
13137 while (abbrev_name
)
13139 if (cur_abbrev
->num_attrs
== allocated_attrs
)
13141 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
13143 = xrealloc (cur_attrs
, (allocated_attrs
13144 * sizeof (struct attr_abbrev
)));
13147 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
13148 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
13149 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13150 abbrev_ptr
+= bytes_read
;
13151 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13152 abbrev_ptr
+= bytes_read
;
13155 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
13156 (cur_abbrev
->num_attrs
13157 * sizeof (struct attr_abbrev
)));
13158 memcpy (cur_abbrev
->attrs
, cur_attrs
,
13159 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
13161 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
13163 /* Get next abbreviation.
13164 Under Irix6 the abbreviations for a compilation unit are not
13165 always properly terminated with an abbrev number of 0.
13166 Exit loop if we encounter an abbreviation which we have
13167 already read (which means we are about to read the abbreviations
13168 for the next compile unit) or if the end of the abbreviation
13169 table is reached. */
13170 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
13172 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13173 abbrev_ptr
+= bytes_read
;
13174 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
13179 return abbrev_table
;
13182 /* Free the resources held by ABBREV_TABLE. */
13185 abbrev_table_free (struct abbrev_table
*abbrev_table
)
13187 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
13188 xfree (abbrev_table
);
13191 /* Same as abbrev_table_free but as a cleanup.
13192 We pass in a pointer to the pointer to the table so that we can
13193 set the pointer to NULL when we're done. It also simplifies
13194 build_type_unit_groups. */
13197 abbrev_table_free_cleanup (void *table_ptr
)
13199 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
13201 if (*abbrev_table_ptr
!= NULL
)
13202 abbrev_table_free (*abbrev_table_ptr
);
13203 *abbrev_table_ptr
= NULL
;
13206 /* Read the abbrev table for CU from ABBREV_SECTION. */
13209 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
13210 struct dwarf2_section_info
*abbrev_section
)
13213 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
13216 /* Release the memory used by the abbrev table for a compilation unit. */
13219 dwarf2_free_abbrev_table (void *ptr_to_cu
)
13221 struct dwarf2_cu
*cu
= ptr_to_cu
;
13223 abbrev_table_free (cu
->abbrev_table
);
13224 /* Set this to NULL so that we SEGV if we try to read it later,
13225 and also because free_comp_unit verifies this is NULL. */
13226 cu
->abbrev_table
= NULL
;
13229 /* Returns nonzero if TAG represents a type that we might generate a partial
13233 is_type_tag_for_partial (int tag
)
13238 /* Some types that would be reasonable to generate partial symbols for,
13239 that we don't at present. */
13240 case DW_TAG_array_type
:
13241 case DW_TAG_file_type
:
13242 case DW_TAG_ptr_to_member_type
:
13243 case DW_TAG_set_type
:
13244 case DW_TAG_string_type
:
13245 case DW_TAG_subroutine_type
:
13247 case DW_TAG_base_type
:
13248 case DW_TAG_class_type
:
13249 case DW_TAG_interface_type
:
13250 case DW_TAG_enumeration_type
:
13251 case DW_TAG_structure_type
:
13252 case DW_TAG_subrange_type
:
13253 case DW_TAG_typedef
:
13254 case DW_TAG_union_type
:
13261 /* Load all DIEs that are interesting for partial symbols into memory. */
13263 static struct partial_die_info
*
13264 load_partial_dies (const struct die_reader_specs
*reader
,
13265 gdb_byte
*info_ptr
, int building_psymtab
)
13267 struct dwarf2_cu
*cu
= reader
->cu
;
13268 struct objfile
*objfile
= cu
->objfile
;
13269 struct partial_die_info
*part_die
;
13270 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
13271 struct abbrev_info
*abbrev
;
13272 unsigned int bytes_read
;
13273 unsigned int load_all
= 0;
13274 int nesting_level
= 1;
13279 gdb_assert (cu
->per_cu
!= NULL
);
13280 if (cu
->per_cu
->load_all_dies
)
13284 = htab_create_alloc_ex (cu
->header
.length
/ 12,
13288 &cu
->comp_unit_obstack
,
13289 hashtab_obstack_allocate
,
13290 dummy_obstack_deallocate
);
13292 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
13293 sizeof (struct partial_die_info
));
13297 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
13299 /* A NULL abbrev means the end of a series of children. */
13300 if (abbrev
== NULL
)
13302 if (--nesting_level
== 0)
13304 /* PART_DIE was probably the last thing allocated on the
13305 comp_unit_obstack, so we could call obstack_free
13306 here. We don't do that because the waste is small,
13307 and will be cleaned up when we're done with this
13308 compilation unit. This way, we're also more robust
13309 against other users of the comp_unit_obstack. */
13312 info_ptr
+= bytes_read
;
13313 last_die
= parent_die
;
13314 parent_die
= parent_die
->die_parent
;
13318 /* Check for template arguments. We never save these; if
13319 they're seen, we just mark the parent, and go on our way. */
13320 if (parent_die
!= NULL
13321 && cu
->language
== language_cplus
13322 && (abbrev
->tag
== DW_TAG_template_type_param
13323 || abbrev
->tag
== DW_TAG_template_value_param
))
13325 parent_die
->has_template_arguments
= 1;
13329 /* We don't need a partial DIE for the template argument. */
13330 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13335 /* We only recurse into c++ subprograms looking for template arguments.
13336 Skip their other children. */
13338 && cu
->language
== language_cplus
13339 && parent_die
!= NULL
13340 && parent_die
->tag
== DW_TAG_subprogram
)
13342 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13346 /* Check whether this DIE is interesting enough to save. Normally
13347 we would not be interested in members here, but there may be
13348 later variables referencing them via DW_AT_specification (for
13349 static members). */
13351 && !is_type_tag_for_partial (abbrev
->tag
)
13352 && abbrev
->tag
!= DW_TAG_constant
13353 && abbrev
->tag
!= DW_TAG_enumerator
13354 && abbrev
->tag
!= DW_TAG_subprogram
13355 && abbrev
->tag
!= DW_TAG_lexical_block
13356 && abbrev
->tag
!= DW_TAG_variable
13357 && abbrev
->tag
!= DW_TAG_namespace
13358 && abbrev
->tag
!= DW_TAG_module
13359 && abbrev
->tag
!= DW_TAG_member
13360 && abbrev
->tag
!= DW_TAG_imported_unit
)
13362 /* Otherwise we skip to the next sibling, if any. */
13363 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13367 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
13370 /* This two-pass algorithm for processing partial symbols has a
13371 high cost in cache pressure. Thus, handle some simple cases
13372 here which cover the majority of C partial symbols. DIEs
13373 which neither have specification tags in them, nor could have
13374 specification tags elsewhere pointing at them, can simply be
13375 processed and discarded.
13377 This segment is also optional; scan_partial_symbols and
13378 add_partial_symbol will handle these DIEs if we chain
13379 them in normally. When compilers which do not emit large
13380 quantities of duplicate debug information are more common,
13381 this code can probably be removed. */
13383 /* Any complete simple types at the top level (pretty much all
13384 of them, for a language without namespaces), can be processed
13386 if (parent_die
== NULL
13387 && part_die
->has_specification
== 0
13388 && part_die
->is_declaration
== 0
13389 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
13390 || part_die
->tag
== DW_TAG_base_type
13391 || part_die
->tag
== DW_TAG_subrange_type
))
13393 if (building_psymtab
&& part_die
->name
!= NULL
)
13394 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
13395 VAR_DOMAIN
, LOC_TYPEDEF
,
13396 &objfile
->static_psymbols
,
13397 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
13398 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
13402 /* The exception for DW_TAG_typedef with has_children above is
13403 a workaround of GCC PR debug/47510. In the case of this complaint
13404 type_name_no_tag_or_error will error on such types later.
13406 GDB skipped children of DW_TAG_typedef by the shortcut above and then
13407 it could not find the child DIEs referenced later, this is checked
13408 above. In correct DWARF DW_TAG_typedef should have no children. */
13410 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
13411 complaint (&symfile_complaints
,
13412 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
13413 "- DIE at 0x%x [in module %s]"),
13414 part_die
->offset
.sect_off
, objfile
->name
);
13416 /* If we're at the second level, and we're an enumerator, and
13417 our parent has no specification (meaning possibly lives in a
13418 namespace elsewhere), then we can add the partial symbol now
13419 instead of queueing it. */
13420 if (part_die
->tag
== DW_TAG_enumerator
13421 && parent_die
!= NULL
13422 && parent_die
->die_parent
== NULL
13423 && parent_die
->tag
== DW_TAG_enumeration_type
13424 && parent_die
->has_specification
== 0)
13426 if (part_die
->name
== NULL
)
13427 complaint (&symfile_complaints
,
13428 _("malformed enumerator DIE ignored"));
13429 else if (building_psymtab
)
13430 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
13431 VAR_DOMAIN
, LOC_CONST
,
13432 (cu
->language
== language_cplus
13433 || cu
->language
== language_java
)
13434 ? &objfile
->global_psymbols
13435 : &objfile
->static_psymbols
,
13436 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
13438 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
13442 /* We'll save this DIE so link it in. */
13443 part_die
->die_parent
= parent_die
;
13444 part_die
->die_sibling
= NULL
;
13445 part_die
->die_child
= NULL
;
13447 if (last_die
&& last_die
== parent_die
)
13448 last_die
->die_child
= part_die
;
13450 last_die
->die_sibling
= part_die
;
13452 last_die
= part_die
;
13454 if (first_die
== NULL
)
13455 first_die
= part_die
;
13457 /* Maybe add the DIE to the hash table. Not all DIEs that we
13458 find interesting need to be in the hash table, because we
13459 also have the parent/sibling/child chains; only those that we
13460 might refer to by offset later during partial symbol reading.
13462 For now this means things that might have be the target of a
13463 DW_AT_specification, DW_AT_abstract_origin, or
13464 DW_AT_extension. DW_AT_extension will refer only to
13465 namespaces; DW_AT_abstract_origin refers to functions (and
13466 many things under the function DIE, but we do not recurse
13467 into function DIEs during partial symbol reading) and
13468 possibly variables as well; DW_AT_specification refers to
13469 declarations. Declarations ought to have the DW_AT_declaration
13470 flag. It happens that GCC forgets to put it in sometimes, but
13471 only for functions, not for types.
13473 Adding more things than necessary to the hash table is harmless
13474 except for the performance cost. Adding too few will result in
13475 wasted time in find_partial_die, when we reread the compilation
13476 unit with load_all_dies set. */
13479 || abbrev
->tag
== DW_TAG_constant
13480 || abbrev
->tag
== DW_TAG_subprogram
13481 || abbrev
->tag
== DW_TAG_variable
13482 || abbrev
->tag
== DW_TAG_namespace
13483 || part_die
->is_declaration
)
13487 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
13488 part_die
->offset
.sect_off
, INSERT
);
13492 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
13493 sizeof (struct partial_die_info
));
13495 /* For some DIEs we want to follow their children (if any). For C
13496 we have no reason to follow the children of structures; for other
13497 languages we have to, so that we can get at method physnames
13498 to infer fully qualified class names, for DW_AT_specification,
13499 and for C++ template arguments. For C++, we also look one level
13500 inside functions to find template arguments (if the name of the
13501 function does not already contain the template arguments).
13503 For Ada, we need to scan the children of subprograms and lexical
13504 blocks as well because Ada allows the definition of nested
13505 entities that could be interesting for the debugger, such as
13506 nested subprograms for instance. */
13507 if (last_die
->has_children
13509 || last_die
->tag
== DW_TAG_namespace
13510 || last_die
->tag
== DW_TAG_module
13511 || last_die
->tag
== DW_TAG_enumeration_type
13512 || (cu
->language
== language_cplus
13513 && last_die
->tag
== DW_TAG_subprogram
13514 && (last_die
->name
== NULL
13515 || strchr (last_die
->name
, '<') == NULL
))
13516 || (cu
->language
!= language_c
13517 && (last_die
->tag
== DW_TAG_class_type
13518 || last_die
->tag
== DW_TAG_interface_type
13519 || last_die
->tag
== DW_TAG_structure_type
13520 || last_die
->tag
== DW_TAG_union_type
))
13521 || (cu
->language
== language_ada
13522 && (last_die
->tag
== DW_TAG_subprogram
13523 || last_die
->tag
== DW_TAG_lexical_block
))))
13526 parent_die
= last_die
;
13530 /* Otherwise we skip to the next sibling, if any. */
13531 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
13533 /* Back to the top, do it again. */
13537 /* Read a minimal amount of information into the minimal die structure. */
13540 read_partial_die (const struct die_reader_specs
*reader
,
13541 struct partial_die_info
*part_die
,
13542 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
13543 gdb_byte
*info_ptr
)
13545 struct dwarf2_cu
*cu
= reader
->cu
;
13546 struct objfile
*objfile
= cu
->objfile
;
13547 gdb_byte
*buffer
= reader
->buffer
;
13549 struct attribute attr
;
13550 int has_low_pc_attr
= 0;
13551 int has_high_pc_attr
= 0;
13552 int high_pc_relative
= 0;
13554 memset (part_die
, 0, sizeof (struct partial_die_info
));
13556 part_die
->offset
.sect_off
= info_ptr
- buffer
;
13558 info_ptr
+= abbrev_len
;
13560 if (abbrev
== NULL
)
13563 part_die
->tag
= abbrev
->tag
;
13564 part_die
->has_children
= abbrev
->has_children
;
13566 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
13568 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
13570 /* Store the data if it is of an attribute we want to keep in a
13571 partial symbol table. */
13575 switch (part_die
->tag
)
13577 case DW_TAG_compile_unit
:
13578 case DW_TAG_partial_unit
:
13579 case DW_TAG_type_unit
:
13580 /* Compilation units have a DW_AT_name that is a filename, not
13581 a source language identifier. */
13582 case DW_TAG_enumeration_type
:
13583 case DW_TAG_enumerator
:
13584 /* These tags always have simple identifiers already; no need
13585 to canonicalize them. */
13586 part_die
->name
= DW_STRING (&attr
);
13590 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
13591 &objfile
->objfile_obstack
);
13595 case DW_AT_linkage_name
:
13596 case DW_AT_MIPS_linkage_name
:
13597 /* Note that both forms of linkage name might appear. We
13598 assume they will be the same, and we only store the last
13600 if (cu
->language
== language_ada
)
13601 part_die
->name
= DW_STRING (&attr
);
13602 part_die
->linkage_name
= DW_STRING (&attr
);
13605 has_low_pc_attr
= 1;
13606 part_die
->lowpc
= DW_ADDR (&attr
);
13608 case DW_AT_high_pc
:
13609 has_high_pc_attr
= 1;
13610 if (attr
.form
== DW_FORM_addr
13611 || attr
.form
== DW_FORM_GNU_addr_index
)
13612 part_die
->highpc
= DW_ADDR (&attr
);
13615 high_pc_relative
= 1;
13616 part_die
->highpc
= DW_UNSND (&attr
);
13619 case DW_AT_location
:
13620 /* Support the .debug_loc offsets. */
13621 if (attr_form_is_block (&attr
))
13623 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
13625 else if (attr_form_is_section_offset (&attr
))
13627 dwarf2_complex_location_expr_complaint ();
13631 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13632 "partial symbol information");
13635 case DW_AT_external
:
13636 part_die
->is_external
= DW_UNSND (&attr
);
13638 case DW_AT_declaration
:
13639 part_die
->is_declaration
= DW_UNSND (&attr
);
13642 part_die
->has_type
= 1;
13644 case DW_AT_abstract_origin
:
13645 case DW_AT_specification
:
13646 case DW_AT_extension
:
13647 part_die
->has_specification
= 1;
13648 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
13649 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
13650 || cu
->per_cu
->is_dwz
);
13652 case DW_AT_sibling
:
13653 /* Ignore absolute siblings, they might point outside of
13654 the current compile unit. */
13655 if (attr
.form
== DW_FORM_ref_addr
)
13656 complaint (&symfile_complaints
,
13657 _("ignoring absolute DW_AT_sibling"));
13659 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
13661 case DW_AT_byte_size
:
13662 part_die
->has_byte_size
= 1;
13664 case DW_AT_calling_convention
:
13665 /* DWARF doesn't provide a way to identify a program's source-level
13666 entry point. DW_AT_calling_convention attributes are only meant
13667 to describe functions' calling conventions.
13669 However, because it's a necessary piece of information in
13670 Fortran, and because DW_CC_program is the only piece of debugging
13671 information whose definition refers to a 'main program' at all,
13672 several compilers have begun marking Fortran main programs with
13673 DW_CC_program --- even when those functions use the standard
13674 calling conventions.
13676 So until DWARF specifies a way to provide this information and
13677 compilers pick up the new representation, we'll support this
13679 if (DW_UNSND (&attr
) == DW_CC_program
13680 && cu
->language
== language_fortran
)
13682 set_main_name (part_die
->name
);
13684 /* As this DIE has a static linkage the name would be difficult
13685 to look up later. */
13686 language_of_main
= language_fortran
;
13690 if (DW_UNSND (&attr
) == DW_INL_inlined
13691 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
13692 part_die
->may_be_inlined
= 1;
13696 if (part_die
->tag
== DW_TAG_imported_unit
)
13698 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
13699 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
13700 || cu
->per_cu
->is_dwz
);
13709 if (high_pc_relative
)
13710 part_die
->highpc
+= part_die
->lowpc
;
13712 if (has_low_pc_attr
&& has_high_pc_attr
)
13714 /* When using the GNU linker, .gnu.linkonce. sections are used to
13715 eliminate duplicate copies of functions and vtables and such.
13716 The linker will arbitrarily choose one and discard the others.
13717 The AT_*_pc values for such functions refer to local labels in
13718 these sections. If the section from that file was discarded, the
13719 labels are not in the output, so the relocs get a value of 0.
13720 If this is a discarded function, mark the pc bounds as invalid,
13721 so that GDB will ignore it. */
13722 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
13724 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13726 complaint (&symfile_complaints
,
13727 _("DW_AT_low_pc %s is zero "
13728 "for DIE at 0x%x [in module %s]"),
13729 paddress (gdbarch
, part_die
->lowpc
),
13730 part_die
->offset
.sect_off
, objfile
->name
);
13732 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
13733 else if (part_die
->lowpc
>= part_die
->highpc
)
13735 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13737 complaint (&symfile_complaints
,
13738 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
13739 "for DIE at 0x%x [in module %s]"),
13740 paddress (gdbarch
, part_die
->lowpc
),
13741 paddress (gdbarch
, part_die
->highpc
),
13742 part_die
->offset
.sect_off
, objfile
->name
);
13745 part_die
->has_pc_info
= 1;
13751 /* Find a cached partial DIE at OFFSET in CU. */
13753 static struct partial_die_info
*
13754 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
13756 struct partial_die_info
*lookup_die
= NULL
;
13757 struct partial_die_info part_die
;
13759 part_die
.offset
= offset
;
13760 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
13766 /* Find a partial DIE at OFFSET, which may or may not be in CU,
13767 except in the case of .debug_types DIEs which do not reference
13768 outside their CU (they do however referencing other types via
13769 DW_FORM_ref_sig8). */
13771 static struct partial_die_info
*
13772 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
13774 struct objfile
*objfile
= cu
->objfile
;
13775 struct dwarf2_per_cu_data
*per_cu
= NULL
;
13776 struct partial_die_info
*pd
= NULL
;
13778 if (offset_in_dwz
== cu
->per_cu
->is_dwz
13779 && offset_in_cu_p (&cu
->header
, offset
))
13781 pd
= find_partial_die_in_comp_unit (offset
, cu
);
13784 /* We missed recording what we needed.
13785 Load all dies and try again. */
13786 per_cu
= cu
->per_cu
;
13790 /* TUs don't reference other CUs/TUs (except via type signatures). */
13791 if (cu
->per_cu
->is_debug_types
)
13793 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
13794 " external reference to offset 0x%lx [in module %s].\n"),
13795 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
13796 bfd_get_filename (objfile
->obfd
));
13798 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
13801 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
13802 load_partial_comp_unit (per_cu
);
13804 per_cu
->cu
->last_used
= 0;
13805 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
13808 /* If we didn't find it, and not all dies have been loaded,
13809 load them all and try again. */
13811 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
13813 per_cu
->load_all_dies
= 1;
13815 /* This is nasty. When we reread the DIEs, somewhere up the call chain
13816 THIS_CU->cu may already be in use. So we can't just free it and
13817 replace its DIEs with the ones we read in. Instead, we leave those
13818 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
13819 and clobber THIS_CU->cu->partial_dies with the hash table for the new
13821 load_partial_comp_unit (per_cu
);
13823 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
13827 internal_error (__FILE__
, __LINE__
,
13828 _("could not find partial DIE 0x%x "
13829 "in cache [from module %s]\n"),
13830 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
13834 /* See if we can figure out if the class lives in a namespace. We do
13835 this by looking for a member function; its demangled name will
13836 contain namespace info, if there is any. */
13839 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
13840 struct dwarf2_cu
*cu
)
13842 /* NOTE: carlton/2003-10-07: Getting the info this way changes
13843 what template types look like, because the demangler
13844 frequently doesn't give the same name as the debug info. We
13845 could fix this by only using the demangled name to get the
13846 prefix (but see comment in read_structure_type). */
13848 struct partial_die_info
*real_pdi
;
13849 struct partial_die_info
*child_pdi
;
13851 /* If this DIE (this DIE's specification, if any) has a parent, then
13852 we should not do this. We'll prepend the parent's fully qualified
13853 name when we create the partial symbol. */
13855 real_pdi
= struct_pdi
;
13856 while (real_pdi
->has_specification
)
13857 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
13858 real_pdi
->spec_is_dwz
, cu
);
13860 if (real_pdi
->die_parent
!= NULL
)
13863 for (child_pdi
= struct_pdi
->die_child
;
13865 child_pdi
= child_pdi
->die_sibling
)
13867 if (child_pdi
->tag
== DW_TAG_subprogram
13868 && child_pdi
->linkage_name
!= NULL
)
13870 char *actual_class_name
13871 = language_class_name_from_physname (cu
->language_defn
,
13872 child_pdi
->linkage_name
);
13873 if (actual_class_name
!= NULL
)
13876 = obsavestring (actual_class_name
,
13877 strlen (actual_class_name
),
13878 &cu
->objfile
->objfile_obstack
);
13879 xfree (actual_class_name
);
13886 /* Adjust PART_DIE before generating a symbol for it. This function
13887 may set the is_external flag or change the DIE's name. */
13890 fixup_partial_die (struct partial_die_info
*part_die
,
13891 struct dwarf2_cu
*cu
)
13893 /* Once we've fixed up a die, there's no point in doing so again.
13894 This also avoids a memory leak if we were to call
13895 guess_partial_die_structure_name multiple times. */
13896 if (part_die
->fixup_called
)
13899 /* If we found a reference attribute and the DIE has no name, try
13900 to find a name in the referred to DIE. */
13902 if (part_die
->name
== NULL
&& part_die
->has_specification
)
13904 struct partial_die_info
*spec_die
;
13906 spec_die
= find_partial_die (part_die
->spec_offset
,
13907 part_die
->spec_is_dwz
, cu
);
13909 fixup_partial_die (spec_die
, cu
);
13911 if (spec_die
->name
)
13913 part_die
->name
= spec_die
->name
;
13915 /* Copy DW_AT_external attribute if it is set. */
13916 if (spec_die
->is_external
)
13917 part_die
->is_external
= spec_die
->is_external
;
13921 /* Set default names for some unnamed DIEs. */
13923 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
13924 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
13926 /* If there is no parent die to provide a namespace, and there are
13927 children, see if we can determine the namespace from their linkage
13929 if (cu
->language
== language_cplus
13930 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
13931 && part_die
->die_parent
== NULL
13932 && part_die
->has_children
13933 && (part_die
->tag
== DW_TAG_class_type
13934 || part_die
->tag
== DW_TAG_structure_type
13935 || part_die
->tag
== DW_TAG_union_type
))
13936 guess_partial_die_structure_name (part_die
, cu
);
13938 /* GCC might emit a nameless struct or union that has a linkage
13939 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
13940 if (part_die
->name
== NULL
13941 && (part_die
->tag
== DW_TAG_class_type
13942 || part_die
->tag
== DW_TAG_interface_type
13943 || part_die
->tag
== DW_TAG_structure_type
13944 || part_die
->tag
== DW_TAG_union_type
)
13945 && part_die
->linkage_name
!= NULL
)
13949 demangled
= cplus_demangle (part_die
->linkage_name
, DMGL_TYPES
);
13954 /* Strip any leading namespaces/classes, keep only the base name.
13955 DW_AT_name for named DIEs does not contain the prefixes. */
13956 base
= strrchr (demangled
, ':');
13957 if (base
&& base
> demangled
&& base
[-1] == ':')
13962 part_die
->name
= obsavestring (base
, strlen (base
),
13963 &cu
->objfile
->objfile_obstack
);
13968 part_die
->fixup_called
= 1;
13971 /* Read an attribute value described by an attribute form. */
13974 read_attribute_value (const struct die_reader_specs
*reader
,
13975 struct attribute
*attr
, unsigned form
,
13976 gdb_byte
*info_ptr
)
13978 struct dwarf2_cu
*cu
= reader
->cu
;
13979 bfd
*abfd
= reader
->abfd
;
13980 struct comp_unit_head
*cu_header
= &cu
->header
;
13981 unsigned int bytes_read
;
13982 struct dwarf_block
*blk
;
13987 case DW_FORM_ref_addr
:
13988 if (cu
->header
.version
== 2)
13989 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
13991 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
13992 &cu
->header
, &bytes_read
);
13993 info_ptr
+= bytes_read
;
13995 case DW_FORM_GNU_ref_alt
:
13996 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
13997 info_ptr
+= bytes_read
;
14000 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
14001 info_ptr
+= bytes_read
;
14003 case DW_FORM_block2
:
14004 blk
= dwarf_alloc_block (cu
);
14005 blk
->size
= read_2_bytes (abfd
, info_ptr
);
14007 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
14008 info_ptr
+= blk
->size
;
14009 DW_BLOCK (attr
) = blk
;
14011 case DW_FORM_block4
:
14012 blk
= dwarf_alloc_block (cu
);
14013 blk
->size
= read_4_bytes (abfd
, info_ptr
);
14015 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
14016 info_ptr
+= blk
->size
;
14017 DW_BLOCK (attr
) = blk
;
14019 case DW_FORM_data2
:
14020 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
14023 case DW_FORM_data4
:
14024 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
14027 case DW_FORM_data8
:
14028 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
14031 case DW_FORM_sec_offset
:
14032 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
14033 info_ptr
+= bytes_read
;
14035 case DW_FORM_string
:
14036 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
14037 DW_STRING_IS_CANONICAL (attr
) = 0;
14038 info_ptr
+= bytes_read
;
14041 if (!cu
->per_cu
->is_dwz
)
14043 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
14045 DW_STRING_IS_CANONICAL (attr
) = 0;
14046 info_ptr
+= bytes_read
;
14050 case DW_FORM_GNU_strp_alt
:
14052 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
14053 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
14056 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
14057 DW_STRING_IS_CANONICAL (attr
) = 0;
14058 info_ptr
+= bytes_read
;
14061 case DW_FORM_exprloc
:
14062 case DW_FORM_block
:
14063 blk
= dwarf_alloc_block (cu
);
14064 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14065 info_ptr
+= bytes_read
;
14066 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
14067 info_ptr
+= blk
->size
;
14068 DW_BLOCK (attr
) = blk
;
14070 case DW_FORM_block1
:
14071 blk
= dwarf_alloc_block (cu
);
14072 blk
->size
= read_1_byte (abfd
, info_ptr
);
14074 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
14075 info_ptr
+= blk
->size
;
14076 DW_BLOCK (attr
) = blk
;
14078 case DW_FORM_data1
:
14079 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
14083 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
14086 case DW_FORM_flag_present
:
14087 DW_UNSND (attr
) = 1;
14089 case DW_FORM_sdata
:
14090 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
14091 info_ptr
+= bytes_read
;
14093 case DW_FORM_udata
:
14094 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14095 info_ptr
+= bytes_read
;
14098 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14099 + read_1_byte (abfd
, info_ptr
));
14103 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14104 + read_2_bytes (abfd
, info_ptr
));
14108 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14109 + read_4_bytes (abfd
, info_ptr
));
14113 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14114 + read_8_bytes (abfd
, info_ptr
));
14117 case DW_FORM_ref_sig8
:
14118 /* Convert the signature to something we can record in DW_UNSND
14120 NOTE: This is NULL if the type wasn't found. */
14121 DW_SIGNATURED_TYPE (attr
) =
14122 lookup_signatured_type (read_8_bytes (abfd
, info_ptr
));
14125 case DW_FORM_ref_udata
:
14126 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14127 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
14128 info_ptr
+= bytes_read
;
14130 case DW_FORM_indirect
:
14131 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14132 info_ptr
+= bytes_read
;
14133 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
14135 case DW_FORM_GNU_addr_index
:
14136 if (reader
->dwo_file
== NULL
)
14138 /* For now flag a hard error.
14139 Later we can turn this into a complaint. */
14140 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
14141 dwarf_form_name (form
),
14142 bfd_get_filename (abfd
));
14144 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
14145 info_ptr
+= bytes_read
;
14147 case DW_FORM_GNU_str_index
:
14148 if (reader
->dwo_file
== NULL
)
14150 /* For now flag a hard error.
14151 Later we can turn this into a complaint if warranted. */
14152 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
14153 dwarf_form_name (form
),
14154 bfd_get_filename (abfd
));
14157 ULONGEST str_index
=
14158 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14160 DW_STRING (attr
) = read_str_index (reader
, cu
, str_index
);
14161 DW_STRING_IS_CANONICAL (attr
) = 0;
14162 info_ptr
+= bytes_read
;
14166 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
14167 dwarf_form_name (form
),
14168 bfd_get_filename (abfd
));
14172 if (cu
->per_cu
->is_dwz
&& is_ref_attr (attr
))
14173 attr
->form
= DW_FORM_GNU_ref_alt
;
14175 /* We have seen instances where the compiler tried to emit a byte
14176 size attribute of -1 which ended up being encoded as an unsigned
14177 0xffffffff. Although 0xffffffff is technically a valid size value,
14178 an object of this size seems pretty unlikely so we can relatively
14179 safely treat these cases as if the size attribute was invalid and
14180 treat them as zero by default. */
14181 if (attr
->name
== DW_AT_byte_size
14182 && form
== DW_FORM_data4
14183 && DW_UNSND (attr
) >= 0xffffffff)
14186 (&symfile_complaints
,
14187 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
14188 hex_string (DW_UNSND (attr
)));
14189 DW_UNSND (attr
) = 0;
14195 /* Read an attribute described by an abbreviated attribute. */
14198 read_attribute (const struct die_reader_specs
*reader
,
14199 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
14200 gdb_byte
*info_ptr
)
14202 attr
->name
= abbrev
->name
;
14203 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
14206 /* Read dwarf information from a buffer. */
14208 static unsigned int
14209 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
14211 return bfd_get_8 (abfd
, buf
);
14215 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
14217 return bfd_get_signed_8 (abfd
, buf
);
14220 static unsigned int
14221 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14223 return bfd_get_16 (abfd
, buf
);
14227 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14229 return bfd_get_signed_16 (abfd
, buf
);
14232 static unsigned int
14233 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14235 return bfd_get_32 (abfd
, buf
);
14239 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14241 return bfd_get_signed_32 (abfd
, buf
);
14245 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14247 return bfd_get_64 (abfd
, buf
);
14251 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
14252 unsigned int *bytes_read
)
14254 struct comp_unit_head
*cu_header
= &cu
->header
;
14255 CORE_ADDR retval
= 0;
14257 if (cu_header
->signed_addr_p
)
14259 switch (cu_header
->addr_size
)
14262 retval
= bfd_get_signed_16 (abfd
, buf
);
14265 retval
= bfd_get_signed_32 (abfd
, buf
);
14268 retval
= bfd_get_signed_64 (abfd
, buf
);
14271 internal_error (__FILE__
, __LINE__
,
14272 _("read_address: bad switch, signed [in module %s]"),
14273 bfd_get_filename (abfd
));
14278 switch (cu_header
->addr_size
)
14281 retval
= bfd_get_16 (abfd
, buf
);
14284 retval
= bfd_get_32 (abfd
, buf
);
14287 retval
= bfd_get_64 (abfd
, buf
);
14290 internal_error (__FILE__
, __LINE__
,
14291 _("read_address: bad switch, "
14292 "unsigned [in module %s]"),
14293 bfd_get_filename (abfd
));
14297 *bytes_read
= cu_header
->addr_size
;
14301 /* Read the initial length from a section. The (draft) DWARF 3
14302 specification allows the initial length to take up either 4 bytes
14303 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
14304 bytes describe the length and all offsets will be 8 bytes in length
14307 An older, non-standard 64-bit format is also handled by this
14308 function. The older format in question stores the initial length
14309 as an 8-byte quantity without an escape value. Lengths greater
14310 than 2^32 aren't very common which means that the initial 4 bytes
14311 is almost always zero. Since a length value of zero doesn't make
14312 sense for the 32-bit format, this initial zero can be considered to
14313 be an escape value which indicates the presence of the older 64-bit
14314 format. As written, the code can't detect (old format) lengths
14315 greater than 4GB. If it becomes necessary to handle lengths
14316 somewhat larger than 4GB, we could allow other small values (such
14317 as the non-sensical values of 1, 2, and 3) to also be used as
14318 escape values indicating the presence of the old format.
14320 The value returned via bytes_read should be used to increment the
14321 relevant pointer after calling read_initial_length().
14323 [ Note: read_initial_length() and read_offset() are based on the
14324 document entitled "DWARF Debugging Information Format", revision
14325 3, draft 8, dated November 19, 2001. This document was obtained
14328 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
14330 This document is only a draft and is subject to change. (So beware.)
14332 Details regarding the older, non-standard 64-bit format were
14333 determined empirically by examining 64-bit ELF files produced by
14334 the SGI toolchain on an IRIX 6.5 machine.
14336 - Kevin, July 16, 2002
14340 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
14342 LONGEST length
= bfd_get_32 (abfd
, buf
);
14344 if (length
== 0xffffffff)
14346 length
= bfd_get_64 (abfd
, buf
+ 4);
14349 else if (length
== 0)
14351 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
14352 length
= bfd_get_64 (abfd
, buf
);
14363 /* Cover function for read_initial_length.
14364 Returns the length of the object at BUF, and stores the size of the
14365 initial length in *BYTES_READ and stores the size that offsets will be in
14367 If the initial length size is not equivalent to that specified in
14368 CU_HEADER then issue a complaint.
14369 This is useful when reading non-comp-unit headers. */
14372 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
14373 const struct comp_unit_head
*cu_header
,
14374 unsigned int *bytes_read
,
14375 unsigned int *offset_size
)
14377 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
14379 gdb_assert (cu_header
->initial_length_size
== 4
14380 || cu_header
->initial_length_size
== 8
14381 || cu_header
->initial_length_size
== 12);
14383 if (cu_header
->initial_length_size
!= *bytes_read
)
14384 complaint (&symfile_complaints
,
14385 _("intermixed 32-bit and 64-bit DWARF sections"));
14387 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
14391 /* Read an offset from the data stream. The size of the offset is
14392 given by cu_header->offset_size. */
14395 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
14396 unsigned int *bytes_read
)
14398 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
14400 *bytes_read
= cu_header
->offset_size
;
14404 /* Read an offset from the data stream. */
14407 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
14409 LONGEST retval
= 0;
14411 switch (offset_size
)
14414 retval
= bfd_get_32 (abfd
, buf
);
14417 retval
= bfd_get_64 (abfd
, buf
);
14420 internal_error (__FILE__
, __LINE__
,
14421 _("read_offset_1: bad switch [in module %s]"),
14422 bfd_get_filename (abfd
));
14429 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
14431 /* If the size of a host char is 8 bits, we can return a pointer
14432 to the buffer, otherwise we have to copy the data to a buffer
14433 allocated on the temporary obstack. */
14434 gdb_assert (HOST_CHAR_BIT
== 8);
14439 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14441 /* If the size of a host char is 8 bits, we can return a pointer
14442 to the string, otherwise we have to copy the string to a buffer
14443 allocated on the temporary obstack. */
14444 gdb_assert (HOST_CHAR_BIT
== 8);
14447 *bytes_read_ptr
= 1;
14450 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
14451 return (char *) buf
;
14455 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
14457 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
14458 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
14459 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
14460 bfd_get_filename (abfd
));
14461 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
14462 error (_("DW_FORM_strp pointing outside of "
14463 ".debug_str section [in module %s]"),
14464 bfd_get_filename (abfd
));
14465 gdb_assert (HOST_CHAR_BIT
== 8);
14466 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
14468 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
14471 /* Read a string at offset STR_OFFSET in the .debug_str section from
14472 the .dwz file DWZ. Throw an error if the offset is too large. If
14473 the string consists of a single NUL byte, return NULL; otherwise
14474 return a pointer to the string. */
14477 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
14479 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
14481 if (dwz
->str
.buffer
== NULL
)
14482 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
14483 "section [in module %s]"),
14484 bfd_get_filename (dwz
->dwz_bfd
));
14485 if (str_offset
>= dwz
->str
.size
)
14486 error (_("DW_FORM_GNU_strp_alt pointing outside of "
14487 ".debug_str section [in module %s]"),
14488 bfd_get_filename (dwz
->dwz_bfd
));
14489 gdb_assert (HOST_CHAR_BIT
== 8);
14490 if (dwz
->str
.buffer
[str_offset
] == '\0')
14492 return (char *) (dwz
->str
.buffer
+ str_offset
);
14496 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
14497 const struct comp_unit_head
*cu_header
,
14498 unsigned int *bytes_read_ptr
)
14500 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
14502 return read_indirect_string_at_offset (abfd
, str_offset
);
14506 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14509 unsigned int num_read
;
14511 unsigned char byte
;
14519 byte
= bfd_get_8 (abfd
, buf
);
14522 result
|= ((ULONGEST
) (byte
& 127) << shift
);
14523 if ((byte
& 128) == 0)
14529 *bytes_read_ptr
= num_read
;
14534 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14537 int i
, shift
, num_read
;
14538 unsigned char byte
;
14546 byte
= bfd_get_8 (abfd
, buf
);
14549 result
|= ((LONGEST
) (byte
& 127) << shift
);
14551 if ((byte
& 128) == 0)
14556 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
14557 result
|= -(((LONGEST
) 1) << shift
);
14558 *bytes_read_ptr
= num_read
;
14562 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
14563 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
14564 ADDR_SIZE is the size of addresses from the CU header. */
14567 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
14569 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14570 bfd
*abfd
= objfile
->obfd
;
14571 const gdb_byte
*info_ptr
;
14573 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
14574 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
14575 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
14577 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
14578 error (_("DW_FORM_addr_index pointing outside of "
14579 ".debug_addr section [in module %s]"),
14581 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
14582 + addr_base
+ addr_index
* addr_size
);
14583 if (addr_size
== 4)
14584 return bfd_get_32 (abfd
, info_ptr
);
14586 return bfd_get_64 (abfd
, info_ptr
);
14589 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
14592 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
14594 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
14597 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
14600 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, gdb_byte
*info_ptr
,
14601 unsigned int *bytes_read
)
14603 bfd
*abfd
= cu
->objfile
->obfd
;
14604 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
14606 return read_addr_index (cu
, addr_index
);
14609 /* Data structure to pass results from dwarf2_read_addr_index_reader
14610 back to dwarf2_read_addr_index. */
14612 struct dwarf2_read_addr_index_data
14614 ULONGEST addr_base
;
14618 /* die_reader_func for dwarf2_read_addr_index. */
14621 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
14622 gdb_byte
*info_ptr
,
14623 struct die_info
*comp_unit_die
,
14627 struct dwarf2_cu
*cu
= reader
->cu
;
14628 struct dwarf2_read_addr_index_data
*aidata
=
14629 (struct dwarf2_read_addr_index_data
*) data
;
14631 aidata
->addr_base
= cu
->addr_base
;
14632 aidata
->addr_size
= cu
->header
.addr_size
;
14635 /* Given an index in .debug_addr, fetch the value.
14636 NOTE: This can be called during dwarf expression evaluation,
14637 long after the debug information has been read, and thus per_cu->cu
14638 may no longer exist. */
14641 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
14642 unsigned int addr_index
)
14644 struct objfile
*objfile
= per_cu
->objfile
;
14645 struct dwarf2_cu
*cu
= per_cu
->cu
;
14646 ULONGEST addr_base
;
14649 /* This is intended to be called from outside this file. */
14650 dw2_setup (objfile
);
14652 /* We need addr_base and addr_size.
14653 If we don't have PER_CU->cu, we have to get it.
14654 Nasty, but the alternative is storing the needed info in PER_CU,
14655 which at this point doesn't seem justified: it's not clear how frequently
14656 it would get used and it would increase the size of every PER_CU.
14657 Entry points like dwarf2_per_cu_addr_size do a similar thing
14658 so we're not in uncharted territory here.
14659 Alas we need to be a bit more complicated as addr_base is contained
14662 We don't need to read the entire CU(/TU).
14663 We just need the header and top level die.
14665 IWBN to use the aging mechanism to let us lazily later discard the CU.
14666 For now we skip this optimization. */
14670 addr_base
= cu
->addr_base
;
14671 addr_size
= cu
->header
.addr_size
;
14675 struct dwarf2_read_addr_index_data aidata
;
14677 /* Note: We can't use init_cutu_and_read_dies_simple here,
14678 we need addr_base. */
14679 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
14680 dwarf2_read_addr_index_reader
, &aidata
);
14681 addr_base
= aidata
.addr_base
;
14682 addr_size
= aidata
.addr_size
;
14685 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
14688 /* Given a DW_AT_str_index, fetch the string. */
14691 read_str_index (const struct die_reader_specs
*reader
,
14692 struct dwarf2_cu
*cu
, ULONGEST str_index
)
14694 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14695 const char *dwo_name
= objfile
->name
;
14696 bfd
*abfd
= objfile
->obfd
;
14697 struct dwo_sections
*sections
= &reader
->dwo_file
->sections
;
14698 gdb_byte
*info_ptr
;
14699 ULONGEST str_offset
;
14701 dwarf2_read_section (objfile
, §ions
->str
);
14702 dwarf2_read_section (objfile
, §ions
->str_offsets
);
14703 if (sections
->str
.buffer
== NULL
)
14704 error (_("DW_FORM_str_index used without .debug_str.dwo section"
14705 " in CU at offset 0x%lx [in module %s]"),
14706 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14707 if (sections
->str_offsets
.buffer
== NULL
)
14708 error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section"
14709 " in CU at offset 0x%lx [in module %s]"),
14710 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14711 if (str_index
* cu
->header
.offset_size
>= sections
->str_offsets
.size
)
14712 error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo"
14713 " section in CU at offset 0x%lx [in module %s]"),
14714 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14715 info_ptr
= (sections
->str_offsets
.buffer
14716 + str_index
* cu
->header
.offset_size
);
14717 if (cu
->header
.offset_size
== 4)
14718 str_offset
= bfd_get_32 (abfd
, info_ptr
);
14720 str_offset
= bfd_get_64 (abfd
, info_ptr
);
14721 if (str_offset
>= sections
->str
.size
)
14722 error (_("Offset from DW_FORM_str_index pointing outside of"
14723 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
14724 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14725 return (char *) (sections
->str
.buffer
+ str_offset
);
14728 /* Return the length of an LEB128 number in BUF. */
14731 leb128_size (const gdb_byte
*buf
)
14733 const gdb_byte
*begin
= buf
;
14739 if ((byte
& 128) == 0)
14740 return buf
- begin
;
14745 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
14752 cu
->language
= language_c
;
14754 case DW_LANG_C_plus_plus
:
14755 cu
->language
= language_cplus
;
14758 cu
->language
= language_d
;
14760 case DW_LANG_Fortran77
:
14761 case DW_LANG_Fortran90
:
14762 case DW_LANG_Fortran95
:
14763 cu
->language
= language_fortran
;
14766 cu
->language
= language_go
;
14768 case DW_LANG_Mips_Assembler
:
14769 cu
->language
= language_asm
;
14772 cu
->language
= language_java
;
14774 case DW_LANG_Ada83
:
14775 case DW_LANG_Ada95
:
14776 cu
->language
= language_ada
;
14778 case DW_LANG_Modula2
:
14779 cu
->language
= language_m2
;
14781 case DW_LANG_Pascal83
:
14782 cu
->language
= language_pascal
;
14785 cu
->language
= language_objc
;
14787 case DW_LANG_Cobol74
:
14788 case DW_LANG_Cobol85
:
14790 cu
->language
= language_minimal
;
14793 cu
->language_defn
= language_def (cu
->language
);
14796 /* Return the named attribute or NULL if not there. */
14798 static struct attribute
*
14799 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
14804 struct attribute
*spec
= NULL
;
14806 for (i
= 0; i
< die
->num_attrs
; ++i
)
14808 if (die
->attrs
[i
].name
== name
)
14809 return &die
->attrs
[i
];
14810 if (die
->attrs
[i
].name
== DW_AT_specification
14811 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
14812 spec
= &die
->attrs
[i
];
14818 die
= follow_die_ref (die
, spec
, &cu
);
14824 /* Return the named attribute or NULL if not there,
14825 but do not follow DW_AT_specification, etc.
14826 This is for use in contexts where we're reading .debug_types dies.
14827 Following DW_AT_specification, DW_AT_abstract_origin will take us
14828 back up the chain, and we want to go down. */
14830 static struct attribute
*
14831 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
14835 for (i
= 0; i
< die
->num_attrs
; ++i
)
14836 if (die
->attrs
[i
].name
== name
)
14837 return &die
->attrs
[i
];
14842 /* Return non-zero iff the attribute NAME is defined for the given DIE,
14843 and holds a non-zero value. This function should only be used for
14844 DW_FORM_flag or DW_FORM_flag_present attributes. */
14847 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
14849 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
14851 return (attr
&& DW_UNSND (attr
));
14855 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
14857 /* A DIE is a declaration if it has a DW_AT_declaration attribute
14858 which value is non-zero. However, we have to be careful with
14859 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
14860 (via dwarf2_flag_true_p) follows this attribute. So we may
14861 end up accidently finding a declaration attribute that belongs
14862 to a different DIE referenced by the specification attribute,
14863 even though the given DIE does not have a declaration attribute. */
14864 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
14865 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
14868 /* Return the die giving the specification for DIE, if there is
14869 one. *SPEC_CU is the CU containing DIE on input, and the CU
14870 containing the return value on output. If there is no
14871 specification, but there is an abstract origin, that is
14874 static struct die_info
*
14875 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
14877 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
14880 if (spec_attr
== NULL
)
14881 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
14883 if (spec_attr
== NULL
)
14886 return follow_die_ref (die
, spec_attr
, spec_cu
);
14889 /* Free the line_header structure *LH, and any arrays and strings it
14891 NOTE: This is also used as a "cleanup" function. */
14894 free_line_header (struct line_header
*lh
)
14896 if (lh
->standard_opcode_lengths
)
14897 xfree (lh
->standard_opcode_lengths
);
14899 /* Remember that all the lh->file_names[i].name pointers are
14900 pointers into debug_line_buffer, and don't need to be freed. */
14901 if (lh
->file_names
)
14902 xfree (lh
->file_names
);
14904 /* Similarly for the include directory names. */
14905 if (lh
->include_dirs
)
14906 xfree (lh
->include_dirs
);
14911 /* Add an entry to LH's include directory table. */
14914 add_include_dir (struct line_header
*lh
, char *include_dir
)
14916 /* Grow the array if necessary. */
14917 if (lh
->include_dirs_size
== 0)
14919 lh
->include_dirs_size
= 1; /* for testing */
14920 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
14921 * sizeof (*lh
->include_dirs
));
14923 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
14925 lh
->include_dirs_size
*= 2;
14926 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
14927 (lh
->include_dirs_size
14928 * sizeof (*lh
->include_dirs
)));
14931 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
14934 /* Add an entry to LH's file name table. */
14937 add_file_name (struct line_header
*lh
,
14939 unsigned int dir_index
,
14940 unsigned int mod_time
,
14941 unsigned int length
)
14943 struct file_entry
*fe
;
14945 /* Grow the array if necessary. */
14946 if (lh
->file_names_size
== 0)
14948 lh
->file_names_size
= 1; /* for testing */
14949 lh
->file_names
= xmalloc (lh
->file_names_size
14950 * sizeof (*lh
->file_names
));
14952 else if (lh
->num_file_names
>= lh
->file_names_size
)
14954 lh
->file_names_size
*= 2;
14955 lh
->file_names
= xrealloc (lh
->file_names
,
14956 (lh
->file_names_size
14957 * sizeof (*lh
->file_names
)));
14960 fe
= &lh
->file_names
[lh
->num_file_names
++];
14962 fe
->dir_index
= dir_index
;
14963 fe
->mod_time
= mod_time
;
14964 fe
->length
= length
;
14965 fe
->included_p
= 0;
14969 /* A convenience function to find the proper .debug_line section for a
14972 static struct dwarf2_section_info
*
14973 get_debug_line_section (struct dwarf2_cu
*cu
)
14975 struct dwarf2_section_info
*section
;
14977 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
14979 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
14980 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
14981 else if (cu
->per_cu
->is_dwz
)
14983 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
14985 section
= &dwz
->line
;
14988 section
= &dwarf2_per_objfile
->line
;
14993 /* Read the statement program header starting at OFFSET in
14994 .debug_line, or .debug_line.dwo. Return a pointer
14995 to a struct line_header, allocated using xmalloc.
14997 NOTE: the strings in the include directory and file name tables of
14998 the returned object point into the dwarf line section buffer,
14999 and must not be freed. */
15001 static struct line_header
*
15002 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
15004 struct cleanup
*back_to
;
15005 struct line_header
*lh
;
15006 gdb_byte
*line_ptr
;
15007 unsigned int bytes_read
, offset_size
;
15009 char *cur_dir
, *cur_file
;
15010 struct dwarf2_section_info
*section
;
15013 section
= get_debug_line_section (cu
);
15014 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
15015 if (section
->buffer
== NULL
)
15017 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
15018 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
15020 complaint (&symfile_complaints
, _("missing .debug_line section"));
15024 /* We can't do this until we know the section is non-empty.
15025 Only then do we know we have such a section. */
15026 abfd
= section
->asection
->owner
;
15028 /* Make sure that at least there's room for the total_length field.
15029 That could be 12 bytes long, but we're just going to fudge that. */
15030 if (offset
+ 4 >= section
->size
)
15032 dwarf2_statement_list_fits_in_line_number_section_complaint ();
15036 lh
= xmalloc (sizeof (*lh
));
15037 memset (lh
, 0, sizeof (*lh
));
15038 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
15041 line_ptr
= section
->buffer
+ offset
;
15043 /* Read in the header. */
15045 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
15046 &bytes_read
, &offset_size
);
15047 line_ptr
+= bytes_read
;
15048 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
15050 dwarf2_statement_list_fits_in_line_number_section_complaint ();
15053 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
15054 lh
->version
= read_2_bytes (abfd
, line_ptr
);
15056 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
15057 line_ptr
+= offset_size
;
15058 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
15060 if (lh
->version
>= 4)
15062 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
15066 lh
->maximum_ops_per_instruction
= 1;
15068 if (lh
->maximum_ops_per_instruction
== 0)
15070 lh
->maximum_ops_per_instruction
= 1;
15071 complaint (&symfile_complaints
,
15072 _("invalid maximum_ops_per_instruction "
15073 "in `.debug_line' section"));
15076 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
15078 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
15080 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
15082 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
15084 lh
->standard_opcode_lengths
15085 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
15087 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
15088 for (i
= 1; i
< lh
->opcode_base
; ++i
)
15090 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
15094 /* Read directory table. */
15095 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
15097 line_ptr
+= bytes_read
;
15098 add_include_dir (lh
, cur_dir
);
15100 line_ptr
+= bytes_read
;
15102 /* Read file name table. */
15103 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
15105 unsigned int dir_index
, mod_time
, length
;
15107 line_ptr
+= bytes_read
;
15108 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15109 line_ptr
+= bytes_read
;
15110 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15111 line_ptr
+= bytes_read
;
15112 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15113 line_ptr
+= bytes_read
;
15115 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
15117 line_ptr
+= bytes_read
;
15118 lh
->statement_program_start
= line_ptr
;
15120 if (line_ptr
> (section
->buffer
+ section
->size
))
15121 complaint (&symfile_complaints
,
15122 _("line number info header doesn't "
15123 "fit in `.debug_line' section"));
15125 discard_cleanups (back_to
);
15129 /* Subroutine of dwarf_decode_lines to simplify it.
15130 Return the file name of the psymtab for included file FILE_INDEX
15131 in line header LH of PST.
15132 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
15133 If space for the result is malloc'd, it will be freed by a cleanup.
15134 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
15136 The function creates dangling cleanup registration. */
15139 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
15140 const struct partial_symtab
*pst
,
15141 const char *comp_dir
)
15143 const struct file_entry fe
= lh
->file_names
[file_index
];
15144 char *include_name
= fe
.name
;
15145 char *include_name_to_compare
= include_name
;
15146 char *dir_name
= NULL
;
15147 const char *pst_filename
;
15148 char *copied_name
= NULL
;
15152 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
15154 if (!IS_ABSOLUTE_PATH (include_name
)
15155 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
15157 /* Avoid creating a duplicate psymtab for PST.
15158 We do this by comparing INCLUDE_NAME and PST_FILENAME.
15159 Before we do the comparison, however, we need to account
15160 for DIR_NAME and COMP_DIR.
15161 First prepend dir_name (if non-NULL). If we still don't
15162 have an absolute path prepend comp_dir (if non-NULL).
15163 However, the directory we record in the include-file's
15164 psymtab does not contain COMP_DIR (to match the
15165 corresponding symtab(s)).
15170 bash$ gcc -g ./hello.c
15171 include_name = "hello.c"
15173 DW_AT_comp_dir = comp_dir = "/tmp"
15174 DW_AT_name = "./hello.c" */
15176 if (dir_name
!= NULL
)
15178 include_name
= concat (dir_name
, SLASH_STRING
,
15179 include_name
, (char *)NULL
);
15180 include_name_to_compare
= include_name
;
15181 make_cleanup (xfree
, include_name
);
15183 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
15185 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
15186 include_name
, (char *)NULL
);
15190 pst_filename
= pst
->filename
;
15191 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
15193 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
15194 pst_filename
, (char *)NULL
);
15195 pst_filename
= copied_name
;
15198 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
15200 if (include_name_to_compare
!= include_name
)
15201 xfree (include_name_to_compare
);
15202 if (copied_name
!= NULL
)
15203 xfree (copied_name
);
15207 return include_name
;
15210 /* Ignore this record_line request. */
15213 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
15218 /* Subroutine of dwarf_decode_lines to simplify it.
15219 Process the line number information in LH. */
15222 dwarf_decode_lines_1 (struct line_header
*lh
, const char *comp_dir
,
15223 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
15225 gdb_byte
*line_ptr
, *extended_end
;
15226 gdb_byte
*line_end
;
15227 unsigned int bytes_read
, extended_len
;
15228 unsigned char op_code
, extended_op
, adj_opcode
;
15229 CORE_ADDR baseaddr
;
15230 struct objfile
*objfile
= cu
->objfile
;
15231 bfd
*abfd
= objfile
->obfd
;
15232 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15233 const int decode_for_pst_p
= (pst
!= NULL
);
15234 struct subfile
*last_subfile
= NULL
;
15235 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
15238 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15240 line_ptr
= lh
->statement_program_start
;
15241 line_end
= lh
->statement_program_end
;
15243 /* Read the statement sequences until there's nothing left. */
15244 while (line_ptr
< line_end
)
15246 /* state machine registers */
15247 CORE_ADDR address
= 0;
15248 unsigned int file
= 1;
15249 unsigned int line
= 1;
15250 unsigned int column
= 0;
15251 int is_stmt
= lh
->default_is_stmt
;
15252 int basic_block
= 0;
15253 int end_sequence
= 0;
15255 unsigned char op_index
= 0;
15257 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
15259 /* Start a subfile for the current file of the state machine. */
15260 /* lh->include_dirs and lh->file_names are 0-based, but the
15261 directory and file name numbers in the statement program
15263 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
15267 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15269 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15272 /* Decode the table. */
15273 while (!end_sequence
)
15275 op_code
= read_1_byte (abfd
, line_ptr
);
15277 if (line_ptr
> line_end
)
15279 dwarf2_debug_line_missing_end_sequence_complaint ();
15283 if (op_code
>= lh
->opcode_base
)
15285 /* Special operand. */
15286 adj_opcode
= op_code
- lh
->opcode_base
;
15287 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
15288 / lh
->maximum_ops_per_instruction
)
15289 * lh
->minimum_instruction_length
);
15290 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
15291 % lh
->maximum_ops_per_instruction
);
15292 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
15293 if (lh
->num_file_names
< file
|| file
== 0)
15294 dwarf2_debug_line_missing_file_complaint ();
15295 /* For now we ignore lines not starting on an
15296 instruction boundary. */
15297 else if (op_index
== 0)
15299 lh
->file_names
[file
- 1].included_p
= 1;
15300 if (!decode_for_pst_p
&& is_stmt
)
15302 if (last_subfile
!= current_subfile
)
15304 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15306 (*p_record_line
) (last_subfile
, 0, addr
);
15307 last_subfile
= current_subfile
;
15309 /* Append row to matrix using current values. */
15310 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15311 (*p_record_line
) (current_subfile
, line
, addr
);
15316 else switch (op_code
)
15318 case DW_LNS_extended_op
:
15319 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
15321 line_ptr
+= bytes_read
;
15322 extended_end
= line_ptr
+ extended_len
;
15323 extended_op
= read_1_byte (abfd
, line_ptr
);
15325 switch (extended_op
)
15327 case DW_LNE_end_sequence
:
15328 p_record_line
= record_line
;
15331 case DW_LNE_set_address
:
15332 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
15334 if (address
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15336 /* This line table is for a function which has been
15337 GCd by the linker. Ignore it. PR gdb/12528 */
15340 = line_ptr
- get_debug_line_section (cu
)->buffer
;
15342 complaint (&symfile_complaints
,
15343 _(".debug_line address at offset 0x%lx is 0 "
15345 line_offset
, objfile
->name
);
15346 p_record_line
= noop_record_line
;
15350 line_ptr
+= bytes_read
;
15351 address
+= baseaddr
;
15353 case DW_LNE_define_file
:
15356 unsigned int dir_index
, mod_time
, length
;
15358 cur_file
= read_direct_string (abfd
, line_ptr
,
15360 line_ptr
+= bytes_read
;
15362 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15363 line_ptr
+= bytes_read
;
15365 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15366 line_ptr
+= bytes_read
;
15368 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15369 line_ptr
+= bytes_read
;
15370 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
15373 case DW_LNE_set_discriminator
:
15374 /* The discriminator is not interesting to the debugger;
15376 line_ptr
= extended_end
;
15379 complaint (&symfile_complaints
,
15380 _("mangled .debug_line section"));
15383 /* Make sure that we parsed the extended op correctly. If e.g.
15384 we expected a different address size than the producer used,
15385 we may have read the wrong number of bytes. */
15386 if (line_ptr
!= extended_end
)
15388 complaint (&symfile_complaints
,
15389 _("mangled .debug_line section"));
15394 if (lh
->num_file_names
< file
|| file
== 0)
15395 dwarf2_debug_line_missing_file_complaint ();
15398 lh
->file_names
[file
- 1].included_p
= 1;
15399 if (!decode_for_pst_p
&& is_stmt
)
15401 if (last_subfile
!= current_subfile
)
15403 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15405 (*p_record_line
) (last_subfile
, 0, addr
);
15406 last_subfile
= current_subfile
;
15408 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15409 (*p_record_line
) (current_subfile
, line
, addr
);
15414 case DW_LNS_advance_pc
:
15417 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15419 address
+= (((op_index
+ adjust
)
15420 / lh
->maximum_ops_per_instruction
)
15421 * lh
->minimum_instruction_length
);
15422 op_index
= ((op_index
+ adjust
)
15423 % lh
->maximum_ops_per_instruction
);
15424 line_ptr
+= bytes_read
;
15427 case DW_LNS_advance_line
:
15428 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
15429 line_ptr
+= bytes_read
;
15431 case DW_LNS_set_file
:
15433 /* The arrays lh->include_dirs and lh->file_names are
15434 0-based, but the directory and file name numbers in
15435 the statement program are 1-based. */
15436 struct file_entry
*fe
;
15439 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15440 line_ptr
+= bytes_read
;
15441 if (lh
->num_file_names
< file
|| file
== 0)
15442 dwarf2_debug_line_missing_file_complaint ();
15445 fe
= &lh
->file_names
[file
- 1];
15447 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15448 if (!decode_for_pst_p
)
15450 last_subfile
= current_subfile
;
15451 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15456 case DW_LNS_set_column
:
15457 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15458 line_ptr
+= bytes_read
;
15460 case DW_LNS_negate_stmt
:
15461 is_stmt
= (!is_stmt
);
15463 case DW_LNS_set_basic_block
:
15466 /* Add to the address register of the state machine the
15467 address increment value corresponding to special opcode
15468 255. I.e., this value is scaled by the minimum
15469 instruction length since special opcode 255 would have
15470 scaled the increment. */
15471 case DW_LNS_const_add_pc
:
15473 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
15475 address
+= (((op_index
+ adjust
)
15476 / lh
->maximum_ops_per_instruction
)
15477 * lh
->minimum_instruction_length
);
15478 op_index
= ((op_index
+ adjust
)
15479 % lh
->maximum_ops_per_instruction
);
15482 case DW_LNS_fixed_advance_pc
:
15483 address
+= read_2_bytes (abfd
, line_ptr
);
15489 /* Unknown standard opcode, ignore it. */
15492 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
15494 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15495 line_ptr
+= bytes_read
;
15500 if (lh
->num_file_names
< file
|| file
== 0)
15501 dwarf2_debug_line_missing_file_complaint ();
15504 lh
->file_names
[file
- 1].included_p
= 1;
15505 if (!decode_for_pst_p
)
15507 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15508 (*p_record_line
) (current_subfile
, 0, addr
);
15514 /* Decode the Line Number Program (LNP) for the given line_header
15515 structure and CU. The actual information extracted and the type
15516 of structures created from the LNP depends on the value of PST.
15518 1. If PST is NULL, then this procedure uses the data from the program
15519 to create all necessary symbol tables, and their linetables.
15521 2. If PST is not NULL, this procedure reads the program to determine
15522 the list of files included by the unit represented by PST, and
15523 builds all the associated partial symbol tables.
15525 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
15526 It is used for relative paths in the line table.
15527 NOTE: When processing partial symtabs (pst != NULL),
15528 comp_dir == pst->dirname.
15530 NOTE: It is important that psymtabs have the same file name (via strcmp)
15531 as the corresponding symtab. Since COMP_DIR is not used in the name of the
15532 symtab we don't use it in the name of the psymtabs we create.
15533 E.g. expand_line_sal requires this when finding psymtabs to expand.
15534 A good testcase for this is mb-inline.exp. */
15537 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
15538 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
15539 int want_line_info
)
15541 struct objfile
*objfile
= cu
->objfile
;
15542 const int decode_for_pst_p
= (pst
!= NULL
);
15543 struct subfile
*first_subfile
= current_subfile
;
15545 if (want_line_info
)
15546 dwarf_decode_lines_1 (lh
, comp_dir
, cu
, pst
);
15548 if (decode_for_pst_p
)
15552 /* Now that we're done scanning the Line Header Program, we can
15553 create the psymtab of each included file. */
15554 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
15555 if (lh
->file_names
[file_index
].included_p
== 1)
15557 char *include_name
=
15558 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
15559 if (include_name
!= NULL
)
15560 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
15565 /* Make sure a symtab is created for every file, even files
15566 which contain only variables (i.e. no code with associated
15570 for (i
= 0; i
< lh
->num_file_names
; i
++)
15573 struct file_entry
*fe
;
15575 fe
= &lh
->file_names
[i
];
15577 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15578 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15580 /* Skip the main file; we don't need it, and it must be
15581 allocated last, so that it will show up before the
15582 non-primary symtabs in the objfile's symtab list. */
15583 if (current_subfile
== first_subfile
)
15586 if (current_subfile
->symtab
== NULL
)
15587 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
15589 fe
->symtab
= current_subfile
->symtab
;
15594 /* Start a subfile for DWARF. FILENAME is the name of the file and
15595 DIRNAME the name of the source directory which contains FILENAME
15596 or NULL if not known. COMP_DIR is the compilation directory for the
15597 linetable's compilation unit or NULL if not known.
15598 This routine tries to keep line numbers from identical absolute and
15599 relative file names in a common subfile.
15601 Using the `list' example from the GDB testsuite, which resides in
15602 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
15603 of /srcdir/list0.c yields the following debugging information for list0.c:
15605 DW_AT_name: /srcdir/list0.c
15606 DW_AT_comp_dir: /compdir
15607 files.files[0].name: list0.h
15608 files.files[0].dir: /srcdir
15609 files.files[1].name: list0.c
15610 files.files[1].dir: /srcdir
15612 The line number information for list0.c has to end up in a single
15613 subfile, so that `break /srcdir/list0.c:1' works as expected.
15614 start_subfile will ensure that this happens provided that we pass the
15615 concatenation of files.files[1].dir and files.files[1].name as the
15619 dwarf2_start_subfile (char *filename
, const char *dirname
,
15620 const char *comp_dir
)
15624 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
15625 `start_symtab' will always pass the contents of DW_AT_comp_dir as
15626 second argument to start_subfile. To be consistent, we do the
15627 same here. In order not to lose the line information directory,
15628 we concatenate it to the filename when it makes sense.
15629 Note that the Dwarf3 standard says (speaking of filenames in line
15630 information): ``The directory index is ignored for file names
15631 that represent full path names''. Thus ignoring dirname in the
15632 `else' branch below isn't an issue. */
15634 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
15635 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
15637 fullname
= filename
;
15639 start_subfile (fullname
, comp_dir
);
15641 if (fullname
!= filename
)
15645 /* Start a symtab for DWARF.
15646 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
15649 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
15650 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
15652 start_symtab (name
, comp_dir
, low_pc
);
15653 record_debugformat ("DWARF 2");
15654 record_producer (cu
->producer
);
15656 /* We assume that we're processing GCC output. */
15657 processing_gcc_compilation
= 2;
15659 processing_has_namespace_info
= 0;
15663 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
15664 struct dwarf2_cu
*cu
)
15666 struct objfile
*objfile
= cu
->objfile
;
15667 struct comp_unit_head
*cu_header
= &cu
->header
;
15669 /* NOTE drow/2003-01-30: There used to be a comment and some special
15670 code here to turn a symbol with DW_AT_external and a
15671 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
15672 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
15673 with some versions of binutils) where shared libraries could have
15674 relocations against symbols in their debug information - the
15675 minimal symbol would have the right address, but the debug info
15676 would not. It's no longer necessary, because we will explicitly
15677 apply relocations when we read in the debug information now. */
15679 /* A DW_AT_location attribute with no contents indicates that a
15680 variable has been optimized away. */
15681 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
15683 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
15687 /* Handle one degenerate form of location expression specially, to
15688 preserve GDB's previous behavior when section offsets are
15689 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
15690 then mark this symbol as LOC_STATIC. */
15692 if (attr_form_is_block (attr
)
15693 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
15694 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
15695 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
15696 && (DW_BLOCK (attr
)->size
15697 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
15699 unsigned int dummy
;
15701 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
15702 SYMBOL_VALUE_ADDRESS (sym
) =
15703 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
15705 SYMBOL_VALUE_ADDRESS (sym
) =
15706 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
15707 SYMBOL_CLASS (sym
) = LOC_STATIC
;
15708 fixup_symbol_section (sym
, objfile
);
15709 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
15710 SYMBOL_SECTION (sym
));
15714 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
15715 expression evaluator, and use LOC_COMPUTED only when necessary
15716 (i.e. when the value of a register or memory location is
15717 referenced, or a thread-local block, etc.). Then again, it might
15718 not be worthwhile. I'm assuming that it isn't unless performance
15719 or memory numbers show me otherwise. */
15721 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
15722 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
15724 if (SYMBOL_COMPUTED_OPS (sym
) == &dwarf2_loclist_funcs
)
15725 cu
->has_loclist
= 1;
15728 /* Given a pointer to a DWARF information entry, figure out if we need
15729 to make a symbol table entry for it, and if so, create a new entry
15730 and return a pointer to it.
15731 If TYPE is NULL, determine symbol type from the die, otherwise
15732 used the passed type.
15733 If SPACE is not NULL, use it to hold the new symbol. If it is
15734 NULL, allocate a new symbol on the objfile's obstack. */
15736 static struct symbol
*
15737 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
15738 struct symbol
*space
)
15740 struct objfile
*objfile
= cu
->objfile
;
15741 struct symbol
*sym
= NULL
;
15743 struct attribute
*attr
= NULL
;
15744 struct attribute
*attr2
= NULL
;
15745 CORE_ADDR baseaddr
;
15746 struct pending
**list_to_add
= NULL
;
15748 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
15750 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15752 name
= dwarf2_name (die
, cu
);
15755 const char *linkagename
;
15756 int suppress_add
= 0;
15761 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
15762 OBJSTAT (objfile
, n_syms
++);
15764 /* Cache this symbol's name and the name's demangled form (if any). */
15765 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
15766 linkagename
= dwarf2_physname (name
, die
, cu
);
15767 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
15769 /* Fortran does not have mangling standard and the mangling does differ
15770 between gfortran, iFort etc. */
15771 if (cu
->language
== language_fortran
15772 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
15773 symbol_set_demangled_name (&(sym
->ginfo
),
15774 dwarf2_full_name (name
, die
, cu
),
15777 /* Default assumptions.
15778 Use the passed type or decode it from the die. */
15779 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
15780 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
15782 SYMBOL_TYPE (sym
) = type
;
15784 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
15785 attr
= dwarf2_attr (die
,
15786 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
15790 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
15793 attr
= dwarf2_attr (die
,
15794 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
15798 int file_index
= DW_UNSND (attr
);
15800 if (cu
->line_header
== NULL
15801 || file_index
> cu
->line_header
->num_file_names
)
15802 complaint (&symfile_complaints
,
15803 _("file index out of range"));
15804 else if (file_index
> 0)
15806 struct file_entry
*fe
;
15808 fe
= &cu
->line_header
->file_names
[file_index
- 1];
15809 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
15816 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
15819 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
15821 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
15822 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
15823 SYMBOL_CLASS (sym
) = LOC_LABEL
;
15824 add_symbol_to_list (sym
, cu
->list_in_scope
);
15826 case DW_TAG_subprogram
:
15827 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
15829 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
15830 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15831 if ((attr2
&& (DW_UNSND (attr2
) != 0))
15832 || cu
->language
== language_ada
)
15834 /* Subprograms marked external are stored as a global symbol.
15835 Ada subprograms, whether marked external or not, are always
15836 stored as a global symbol, because we want to be able to
15837 access them globally. For instance, we want to be able
15838 to break on a nested subprogram without having to
15839 specify the context. */
15840 list_to_add
= &global_symbols
;
15844 list_to_add
= cu
->list_in_scope
;
15847 case DW_TAG_inlined_subroutine
:
15848 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
15850 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
15851 SYMBOL_INLINED (sym
) = 1;
15852 list_to_add
= cu
->list_in_scope
;
15854 case DW_TAG_template_value_param
:
15856 /* Fall through. */
15857 case DW_TAG_constant
:
15858 case DW_TAG_variable
:
15859 case DW_TAG_member
:
15860 /* Compilation with minimal debug info may result in
15861 variables with missing type entries. Change the
15862 misleading `void' type to something sensible. */
15863 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
15865 = objfile_type (objfile
)->nodebug_data_symbol
;
15867 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15868 /* In the case of DW_TAG_member, we should only be called for
15869 static const members. */
15870 if (die
->tag
== DW_TAG_member
)
15872 /* dwarf2_add_field uses die_is_declaration,
15873 so we do the same. */
15874 gdb_assert (die_is_declaration (die
, cu
));
15879 dwarf2_const_value (attr
, sym
, cu
);
15880 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15883 if (attr2
&& (DW_UNSND (attr2
) != 0))
15884 list_to_add
= &global_symbols
;
15886 list_to_add
= cu
->list_in_scope
;
15890 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15893 var_decode_location (attr
, sym
, cu
);
15894 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15896 /* Fortran explicitly imports any global symbols to the local
15897 scope by DW_TAG_common_block. */
15898 if (cu
->language
== language_fortran
&& die
->parent
15899 && die
->parent
->tag
== DW_TAG_common_block
)
15902 if (SYMBOL_CLASS (sym
) == LOC_STATIC
15903 && SYMBOL_VALUE_ADDRESS (sym
) == 0
15904 && !dwarf2_per_objfile
->has_section_at_zero
)
15906 /* When a static variable is eliminated by the linker,
15907 the corresponding debug information is not stripped
15908 out, but the variable address is set to null;
15909 do not add such variables into symbol table. */
15911 else if (attr2
&& (DW_UNSND (attr2
) != 0))
15913 /* Workaround gfortran PR debug/40040 - it uses
15914 DW_AT_location for variables in -fPIC libraries which may
15915 get overriden by other libraries/executable and get
15916 a different address. Resolve it by the minimal symbol
15917 which may come from inferior's executable using copy
15918 relocation. Make this workaround only for gfortran as for
15919 other compilers GDB cannot guess the minimal symbol
15920 Fortran mangling kind. */
15921 if (cu
->language
== language_fortran
&& die
->parent
15922 && die
->parent
->tag
== DW_TAG_module
15924 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
15925 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
15927 /* A variable with DW_AT_external is never static,
15928 but it may be block-scoped. */
15929 list_to_add
= (cu
->list_in_scope
== &file_symbols
15930 ? &global_symbols
: cu
->list_in_scope
);
15933 list_to_add
= cu
->list_in_scope
;
15937 /* We do not know the address of this symbol.
15938 If it is an external symbol and we have type information
15939 for it, enter the symbol as a LOC_UNRESOLVED symbol.
15940 The address of the variable will then be determined from
15941 the minimal symbol table whenever the variable is
15943 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15945 /* Fortran explicitly imports any global symbols to the local
15946 scope by DW_TAG_common_block. */
15947 if (cu
->language
== language_fortran
&& die
->parent
15948 && die
->parent
->tag
== DW_TAG_common_block
)
15950 /* SYMBOL_CLASS doesn't matter here because
15951 read_common_block is going to reset it. */
15953 list_to_add
= cu
->list_in_scope
;
15955 else if (attr2
&& (DW_UNSND (attr2
) != 0)
15956 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
15958 /* A variable with DW_AT_external is never static, but it
15959 may be block-scoped. */
15960 list_to_add
= (cu
->list_in_scope
== &file_symbols
15961 ? &global_symbols
: cu
->list_in_scope
);
15963 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
15965 else if (!die_is_declaration (die
, cu
))
15967 /* Use the default LOC_OPTIMIZED_OUT class. */
15968 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
15970 list_to_add
= cu
->list_in_scope
;
15974 case DW_TAG_formal_parameter
:
15975 /* If we are inside a function, mark this as an argument. If
15976 not, we might be looking at an argument to an inlined function
15977 when we do not have enough information to show inlined frames;
15978 pretend it's a local variable in that case so that the user can
15980 if (context_stack_depth
> 0
15981 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
15982 SYMBOL_IS_ARGUMENT (sym
) = 1;
15983 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15986 var_decode_location (attr
, sym
, cu
);
15988 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15991 dwarf2_const_value (attr
, sym
, cu
);
15994 list_to_add
= cu
->list_in_scope
;
15996 case DW_TAG_unspecified_parameters
:
15997 /* From varargs functions; gdb doesn't seem to have any
15998 interest in this information, so just ignore it for now.
16001 case DW_TAG_template_type_param
:
16003 /* Fall through. */
16004 case DW_TAG_class_type
:
16005 case DW_TAG_interface_type
:
16006 case DW_TAG_structure_type
:
16007 case DW_TAG_union_type
:
16008 case DW_TAG_set_type
:
16009 case DW_TAG_enumeration_type
:
16010 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
16011 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
16014 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
16015 really ever be static objects: otherwise, if you try
16016 to, say, break of a class's method and you're in a file
16017 which doesn't mention that class, it won't work unless
16018 the check for all static symbols in lookup_symbol_aux
16019 saves you. See the OtherFileClass tests in
16020 gdb.c++/namespace.exp. */
16024 list_to_add
= (cu
->list_in_scope
== &file_symbols
16025 && (cu
->language
== language_cplus
16026 || cu
->language
== language_java
)
16027 ? &global_symbols
: cu
->list_in_scope
);
16029 /* The semantics of C++ state that "struct foo {
16030 ... }" also defines a typedef for "foo". A Java
16031 class declaration also defines a typedef for the
16033 if (cu
->language
== language_cplus
16034 || cu
->language
== language_java
16035 || cu
->language
== language_ada
)
16037 /* The symbol's name is already allocated along
16038 with this objfile, so we don't need to
16039 duplicate it for the type. */
16040 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
16041 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
16046 case DW_TAG_typedef
:
16047 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
16048 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
16049 list_to_add
= cu
->list_in_scope
;
16051 case DW_TAG_base_type
:
16052 case DW_TAG_subrange_type
:
16053 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
16054 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
16055 list_to_add
= cu
->list_in_scope
;
16057 case DW_TAG_enumerator
:
16058 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
16061 dwarf2_const_value (attr
, sym
, cu
);
16064 /* NOTE: carlton/2003-11-10: See comment above in the
16065 DW_TAG_class_type, etc. block. */
16067 list_to_add
= (cu
->list_in_scope
== &file_symbols
16068 && (cu
->language
== language_cplus
16069 || cu
->language
== language_java
)
16070 ? &global_symbols
: cu
->list_in_scope
);
16073 case DW_TAG_namespace
:
16074 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
16075 list_to_add
= &global_symbols
;
16077 case DW_TAG_common_block
:
16078 SYMBOL_CLASS (sym
) = LOC_COMMON_BLOCK
;
16079 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
16080 add_symbol_to_list (sym
, cu
->list_in_scope
);
16083 /* Not a tag we recognize. Hopefully we aren't processing
16084 trash data, but since we must specifically ignore things
16085 we don't recognize, there is nothing else we should do at
16087 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
16088 dwarf_tag_name (die
->tag
));
16094 sym
->hash_next
= objfile
->template_symbols
;
16095 objfile
->template_symbols
= sym
;
16096 list_to_add
= NULL
;
16099 if (list_to_add
!= NULL
)
16100 add_symbol_to_list (sym
, list_to_add
);
16102 /* For the benefit of old versions of GCC, check for anonymous
16103 namespaces based on the demangled name. */
16104 if (!processing_has_namespace_info
16105 && cu
->language
== language_cplus
)
16106 cp_scan_for_anonymous_namespaces (sym
, objfile
);
16111 /* A wrapper for new_symbol_full that always allocates a new symbol. */
16113 static struct symbol
*
16114 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
16116 return new_symbol_full (die
, type
, cu
, NULL
);
16119 /* Given an attr with a DW_FORM_dataN value in host byte order,
16120 zero-extend it as appropriate for the symbol's type. The DWARF
16121 standard (v4) is not entirely clear about the meaning of using
16122 DW_FORM_dataN for a constant with a signed type, where the type is
16123 wider than the data. The conclusion of a discussion on the DWARF
16124 list was that this is unspecified. We choose to always zero-extend
16125 because that is the interpretation long in use by GCC. */
16128 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
16129 const char *name
, struct obstack
*obstack
,
16130 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
16132 struct objfile
*objfile
= cu
->objfile
;
16133 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
16134 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
16135 LONGEST l
= DW_UNSND (attr
);
16137 if (bits
< sizeof (*value
) * 8)
16139 l
&= ((LONGEST
) 1 << bits
) - 1;
16142 else if (bits
== sizeof (*value
) * 8)
16146 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
16147 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
16154 /* Read a constant value from an attribute. Either set *VALUE, or if
16155 the value does not fit in *VALUE, set *BYTES - either already
16156 allocated on the objfile obstack, or newly allocated on OBSTACK,
16157 or, set *BATON, if we translated the constant to a location
16161 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
16162 const char *name
, struct obstack
*obstack
,
16163 struct dwarf2_cu
*cu
,
16164 LONGEST
*value
, gdb_byte
**bytes
,
16165 struct dwarf2_locexpr_baton
**baton
)
16167 struct objfile
*objfile
= cu
->objfile
;
16168 struct comp_unit_head
*cu_header
= &cu
->header
;
16169 struct dwarf_block
*blk
;
16170 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
16171 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
16177 switch (attr
->form
)
16180 case DW_FORM_GNU_addr_index
:
16184 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
16185 dwarf2_const_value_length_mismatch_complaint (name
,
16186 cu_header
->addr_size
,
16187 TYPE_LENGTH (type
));
16188 /* Symbols of this form are reasonably rare, so we just
16189 piggyback on the existing location code rather than writing
16190 a new implementation of symbol_computed_ops. */
16191 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
16192 sizeof (struct dwarf2_locexpr_baton
));
16193 (*baton
)->per_cu
= cu
->per_cu
;
16194 gdb_assert ((*baton
)->per_cu
);
16196 (*baton
)->size
= 2 + cu_header
->addr_size
;
16197 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
16198 (*baton
)->data
= data
;
16200 data
[0] = DW_OP_addr
;
16201 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
16202 byte_order
, DW_ADDR (attr
));
16203 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
16206 case DW_FORM_string
:
16208 case DW_FORM_GNU_str_index
:
16209 case DW_FORM_GNU_strp_alt
:
16210 /* DW_STRING is already allocated on the objfile obstack, point
16212 *bytes
= (gdb_byte
*) DW_STRING (attr
);
16214 case DW_FORM_block1
:
16215 case DW_FORM_block2
:
16216 case DW_FORM_block4
:
16217 case DW_FORM_block
:
16218 case DW_FORM_exprloc
:
16219 blk
= DW_BLOCK (attr
);
16220 if (TYPE_LENGTH (type
) != blk
->size
)
16221 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
16222 TYPE_LENGTH (type
));
16223 *bytes
= blk
->data
;
16226 /* The DW_AT_const_value attributes are supposed to carry the
16227 symbol's value "represented as it would be on the target
16228 architecture." By the time we get here, it's already been
16229 converted to host endianness, so we just need to sign- or
16230 zero-extend it as appropriate. */
16231 case DW_FORM_data1
:
16232 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16233 obstack
, cu
, value
, 8);
16235 case DW_FORM_data2
:
16236 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16237 obstack
, cu
, value
, 16);
16239 case DW_FORM_data4
:
16240 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16241 obstack
, cu
, value
, 32);
16243 case DW_FORM_data8
:
16244 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16245 obstack
, cu
, value
, 64);
16248 case DW_FORM_sdata
:
16249 *value
= DW_SND (attr
);
16252 case DW_FORM_udata
:
16253 *value
= DW_UNSND (attr
);
16257 complaint (&symfile_complaints
,
16258 _("unsupported const value attribute form: '%s'"),
16259 dwarf_form_name (attr
->form
));
16266 /* Copy constant value from an attribute to a symbol. */
16269 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
16270 struct dwarf2_cu
*cu
)
16272 struct objfile
*objfile
= cu
->objfile
;
16273 struct comp_unit_head
*cu_header
= &cu
->header
;
16276 struct dwarf2_locexpr_baton
*baton
;
16278 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
16279 SYMBOL_PRINT_NAME (sym
),
16280 &objfile
->objfile_obstack
, cu
,
16281 &value
, &bytes
, &baton
);
16285 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
16286 SYMBOL_LOCATION_BATON (sym
) = baton
;
16287 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
16289 else if (bytes
!= NULL
)
16291 SYMBOL_VALUE_BYTES (sym
) = bytes
;
16292 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
16296 SYMBOL_VALUE (sym
) = value
;
16297 SYMBOL_CLASS (sym
) = LOC_CONST
;
16301 /* Return the type of the die in question using its DW_AT_type attribute. */
16303 static struct type
*
16304 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16306 struct attribute
*type_attr
;
16308 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16311 /* A missing DW_AT_type represents a void type. */
16312 return objfile_type (cu
->objfile
)->builtin_void
;
16315 return lookup_die_type (die
, type_attr
, cu
);
16318 /* True iff CU's producer generates GNAT Ada auxiliary information
16319 that allows to find parallel types through that information instead
16320 of having to do expensive parallel lookups by type name. */
16323 need_gnat_info (struct dwarf2_cu
*cu
)
16325 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
16326 of GNAT produces this auxiliary information, without any indication
16327 that it is produced. Part of enhancing the FSF version of GNAT
16328 to produce that information will be to put in place an indicator
16329 that we can use in order to determine whether the descriptive type
16330 info is available or not. One suggestion that has been made is
16331 to use a new attribute, attached to the CU die. For now, assume
16332 that the descriptive type info is not available. */
16336 /* Return the auxiliary type of the die in question using its
16337 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
16338 attribute is not present. */
16340 static struct type
*
16341 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16343 struct attribute
*type_attr
;
16345 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
16349 return lookup_die_type (die
, type_attr
, cu
);
16352 /* If DIE has a descriptive_type attribute, then set the TYPE's
16353 descriptive type accordingly. */
16356 set_descriptive_type (struct type
*type
, struct die_info
*die
,
16357 struct dwarf2_cu
*cu
)
16359 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
16361 if (descriptive_type
)
16363 ALLOCATE_GNAT_AUX_TYPE (type
);
16364 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
16368 /* Return the containing type of the die in question using its
16369 DW_AT_containing_type attribute. */
16371 static struct type
*
16372 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16374 struct attribute
*type_attr
;
16376 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
16378 error (_("Dwarf Error: Problem turning containing type into gdb type "
16379 "[in module %s]"), cu
->objfile
->name
);
16381 return lookup_die_type (die
, type_attr
, cu
);
16384 /* Look up the type of DIE in CU using its type attribute ATTR.
16385 If there is no type substitute an error marker. */
16387 static struct type
*
16388 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
16389 struct dwarf2_cu
*cu
)
16391 struct objfile
*objfile
= cu
->objfile
;
16392 struct type
*this_type
;
16394 /* First see if we have it cached. */
16396 if (attr
->form
== DW_FORM_GNU_ref_alt
)
16398 struct dwarf2_per_cu_data
*per_cu
;
16399 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
16401 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
16402 this_type
= get_die_type_at_offset (offset
, per_cu
);
16404 else if (is_ref_attr (attr
))
16406 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
16408 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
16410 else if (attr
->form
== DW_FORM_ref_sig8
)
16412 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
16414 /* sig_type will be NULL if the signatured type is missing from
16416 if (sig_type
== NULL
)
16417 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
16418 "at 0x%x [in module %s]"),
16419 die
->offset
.sect_off
, objfile
->name
);
16421 gdb_assert (sig_type
->per_cu
.is_debug_types
);
16422 /* If we haven't filled in type_offset_in_section yet, then we
16423 haven't read the type in yet. */
16425 if (sig_type
->type_offset_in_section
.sect_off
!= 0)
16428 get_die_type_at_offset (sig_type
->type_offset_in_section
,
16429 &sig_type
->per_cu
);
16434 dump_die_for_error (die
);
16435 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
16436 dwarf_attr_name (attr
->name
), objfile
->name
);
16439 /* If not cached we need to read it in. */
16441 if (this_type
== NULL
)
16443 struct die_info
*type_die
;
16444 struct dwarf2_cu
*type_cu
= cu
;
16446 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
16447 /* If we found the type now, it's probably because the type came
16448 from an inter-CU reference and the type's CU got expanded before
16450 this_type
= get_die_type (type_die
, type_cu
);
16451 if (this_type
== NULL
)
16452 this_type
= read_type_die_1 (type_die
, type_cu
);
16455 /* If we still don't have a type use an error marker. */
16457 if (this_type
== NULL
)
16459 char *message
, *saved
;
16461 /* read_type_die already issued a complaint. */
16462 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
16464 cu
->header
.offset
.sect_off
,
16465 die
->offset
.sect_off
);
16466 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
16467 message
, strlen (message
));
16470 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
16476 /* Return the type in DIE, CU.
16477 Returns NULL for invalid types.
16479 This first does a lookup in the appropriate type_hash table,
16480 and only reads the die in if necessary.
16482 NOTE: This can be called when reading in partial or full symbols. */
16484 static struct type
*
16485 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
16487 struct type
*this_type
;
16489 this_type
= get_die_type (die
, cu
);
16493 return read_type_die_1 (die
, cu
);
16496 /* Read the type in DIE, CU.
16497 Returns NULL for invalid types. */
16499 static struct type
*
16500 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
16502 struct type
*this_type
= NULL
;
16506 case DW_TAG_class_type
:
16507 case DW_TAG_interface_type
:
16508 case DW_TAG_structure_type
:
16509 case DW_TAG_union_type
:
16510 this_type
= read_structure_type (die
, cu
);
16512 case DW_TAG_enumeration_type
:
16513 this_type
= read_enumeration_type (die
, cu
);
16515 case DW_TAG_subprogram
:
16516 case DW_TAG_subroutine_type
:
16517 case DW_TAG_inlined_subroutine
:
16518 this_type
= read_subroutine_type (die
, cu
);
16520 case DW_TAG_array_type
:
16521 this_type
= read_array_type (die
, cu
);
16523 case DW_TAG_set_type
:
16524 this_type
= read_set_type (die
, cu
);
16526 case DW_TAG_pointer_type
:
16527 this_type
= read_tag_pointer_type (die
, cu
);
16529 case DW_TAG_ptr_to_member_type
:
16530 this_type
= read_tag_ptr_to_member_type (die
, cu
);
16532 case DW_TAG_reference_type
:
16533 this_type
= read_tag_reference_type (die
, cu
);
16535 case DW_TAG_const_type
:
16536 this_type
= read_tag_const_type (die
, cu
);
16538 case DW_TAG_volatile_type
:
16539 this_type
= read_tag_volatile_type (die
, cu
);
16541 case DW_TAG_restrict_type
:
16542 this_type
= read_tag_restrict_type (die
, cu
);
16544 case DW_TAG_string_type
:
16545 this_type
= read_tag_string_type (die
, cu
);
16547 case DW_TAG_typedef
:
16548 this_type
= read_typedef (die
, cu
);
16550 case DW_TAG_subrange_type
:
16551 this_type
= read_subrange_type (die
, cu
);
16553 case DW_TAG_base_type
:
16554 this_type
= read_base_type (die
, cu
);
16556 case DW_TAG_unspecified_type
:
16557 this_type
= read_unspecified_type (die
, cu
);
16559 case DW_TAG_namespace
:
16560 this_type
= read_namespace_type (die
, cu
);
16562 case DW_TAG_module
:
16563 this_type
= read_module_type (die
, cu
);
16566 complaint (&symfile_complaints
,
16567 _("unexpected tag in read_type_die: '%s'"),
16568 dwarf_tag_name (die
->tag
));
16575 /* See if we can figure out if the class lives in a namespace. We do
16576 this by looking for a member function; its demangled name will
16577 contain namespace info, if there is any.
16578 Return the computed name or NULL.
16579 Space for the result is allocated on the objfile's obstack.
16580 This is the full-die version of guess_partial_die_structure_name.
16581 In this case we know DIE has no useful parent. */
16584 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
16586 struct die_info
*spec_die
;
16587 struct dwarf2_cu
*spec_cu
;
16588 struct die_info
*child
;
16591 spec_die
= die_specification (die
, &spec_cu
);
16592 if (spec_die
!= NULL
)
16598 for (child
= die
->child
;
16600 child
= child
->sibling
)
16602 if (child
->tag
== DW_TAG_subprogram
)
16604 struct attribute
*attr
;
16606 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
16608 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
16612 = language_class_name_from_physname (cu
->language_defn
,
16616 if (actual_name
!= NULL
)
16618 const char *die_name
= dwarf2_name (die
, cu
);
16620 if (die_name
!= NULL
16621 && strcmp (die_name
, actual_name
) != 0)
16623 /* Strip off the class name from the full name.
16624 We want the prefix. */
16625 int die_name_len
= strlen (die_name
);
16626 int actual_name_len
= strlen (actual_name
);
16628 /* Test for '::' as a sanity check. */
16629 if (actual_name_len
> die_name_len
+ 2
16630 && actual_name
[actual_name_len
16631 - die_name_len
- 1] == ':')
16633 obsavestring (actual_name
,
16634 actual_name_len
- die_name_len
- 2,
16635 &cu
->objfile
->objfile_obstack
);
16638 xfree (actual_name
);
16647 /* GCC might emit a nameless typedef that has a linkage name. Determine the
16648 prefix part in such case. See
16649 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16652 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
16654 struct attribute
*attr
;
16657 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
16658 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
16661 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
16662 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
16665 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
16667 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
16668 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
16671 /* dwarf2_name had to be already called. */
16672 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
16674 /* Strip the base name, keep any leading namespaces/classes. */
16675 base
= strrchr (DW_STRING (attr
), ':');
16676 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
16679 return obsavestring (DW_STRING (attr
), &base
[-1] - DW_STRING (attr
),
16680 &cu
->objfile
->objfile_obstack
);
16683 /* Return the name of the namespace/class that DIE is defined within,
16684 or "" if we can't tell. The caller should not xfree the result.
16686 For example, if we're within the method foo() in the following
16696 then determine_prefix on foo's die will return "N::C". */
16698 static const char *
16699 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
16701 struct die_info
*parent
, *spec_die
;
16702 struct dwarf2_cu
*spec_cu
;
16703 struct type
*parent_type
;
16706 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
16707 && cu
->language
!= language_fortran
)
16710 retval
= anonymous_struct_prefix (die
, cu
);
16714 /* We have to be careful in the presence of DW_AT_specification.
16715 For example, with GCC 3.4, given the code
16719 // Definition of N::foo.
16723 then we'll have a tree of DIEs like this:
16725 1: DW_TAG_compile_unit
16726 2: DW_TAG_namespace // N
16727 3: DW_TAG_subprogram // declaration of N::foo
16728 4: DW_TAG_subprogram // definition of N::foo
16729 DW_AT_specification // refers to die #3
16731 Thus, when processing die #4, we have to pretend that we're in
16732 the context of its DW_AT_specification, namely the contex of die
16735 spec_die
= die_specification (die
, &spec_cu
);
16736 if (spec_die
== NULL
)
16737 parent
= die
->parent
;
16740 parent
= spec_die
->parent
;
16744 if (parent
== NULL
)
16746 else if (parent
->building_fullname
)
16749 const char *parent_name
;
16751 /* It has been seen on RealView 2.2 built binaries,
16752 DW_TAG_template_type_param types actually _defined_ as
16753 children of the parent class:
16756 template class <class Enum> Class{};
16757 Class<enum E> class_e;
16759 1: DW_TAG_class_type (Class)
16760 2: DW_TAG_enumeration_type (E)
16761 3: DW_TAG_enumerator (enum1:0)
16762 3: DW_TAG_enumerator (enum2:1)
16764 2: DW_TAG_template_type_param
16765 DW_AT_type DW_FORM_ref_udata (E)
16767 Besides being broken debug info, it can put GDB into an
16768 infinite loop. Consider:
16770 When we're building the full name for Class<E>, we'll start
16771 at Class, and go look over its template type parameters,
16772 finding E. We'll then try to build the full name of E, and
16773 reach here. We're now trying to build the full name of E,
16774 and look over the parent DIE for containing scope. In the
16775 broken case, if we followed the parent DIE of E, we'd again
16776 find Class, and once again go look at its template type
16777 arguments, etc., etc. Simply don't consider such parent die
16778 as source-level parent of this die (it can't be, the language
16779 doesn't allow it), and break the loop here. */
16780 name
= dwarf2_name (die
, cu
);
16781 parent_name
= dwarf2_name (parent
, cu
);
16782 complaint (&symfile_complaints
,
16783 _("template param type '%s' defined within parent '%s'"),
16784 name
? name
: "<unknown>",
16785 parent_name
? parent_name
: "<unknown>");
16789 switch (parent
->tag
)
16791 case DW_TAG_namespace
:
16792 parent_type
= read_type_die (parent
, cu
);
16793 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
16794 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
16795 Work around this problem here. */
16796 if (cu
->language
== language_cplus
16797 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
16799 /* We give a name to even anonymous namespaces. */
16800 return TYPE_TAG_NAME (parent_type
);
16801 case DW_TAG_class_type
:
16802 case DW_TAG_interface_type
:
16803 case DW_TAG_structure_type
:
16804 case DW_TAG_union_type
:
16805 case DW_TAG_module
:
16806 parent_type
= read_type_die (parent
, cu
);
16807 if (TYPE_TAG_NAME (parent_type
) != NULL
)
16808 return TYPE_TAG_NAME (parent_type
);
16810 /* An anonymous structure is only allowed non-static data
16811 members; no typedefs, no member functions, et cetera.
16812 So it does not need a prefix. */
16814 case DW_TAG_compile_unit
:
16815 case DW_TAG_partial_unit
:
16816 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
16817 if (cu
->language
== language_cplus
16818 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16819 && die
->child
!= NULL
16820 && (die
->tag
== DW_TAG_class_type
16821 || die
->tag
== DW_TAG_structure_type
16822 || die
->tag
== DW_TAG_union_type
))
16824 char *name
= guess_full_die_structure_name (die
, cu
);
16830 return determine_prefix (parent
, cu
);
16834 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
16835 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
16836 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
16837 an obconcat, otherwise allocate storage for the result. The CU argument is
16838 used to determine the language and hence, the appropriate separator. */
16840 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
16843 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
16844 int physname
, struct dwarf2_cu
*cu
)
16846 const char *lead
= "";
16849 if (suffix
== NULL
|| suffix
[0] == '\0'
16850 || prefix
== NULL
|| prefix
[0] == '\0')
16852 else if (cu
->language
== language_java
)
16854 else if (cu
->language
== language_fortran
&& physname
)
16856 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
16857 DW_AT_MIPS_linkage_name is preferred and used instead. */
16865 if (prefix
== NULL
)
16867 if (suffix
== NULL
)
16873 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
16875 strcpy (retval
, lead
);
16876 strcat (retval
, prefix
);
16877 strcat (retval
, sep
);
16878 strcat (retval
, suffix
);
16883 /* We have an obstack. */
16884 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
16888 /* Return sibling of die, NULL if no sibling. */
16890 static struct die_info
*
16891 sibling_die (struct die_info
*die
)
16893 return die
->sibling
;
16896 /* Get name of a die, return NULL if not found. */
16898 static const char *
16899 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
16900 struct obstack
*obstack
)
16902 if (name
&& cu
->language
== language_cplus
)
16904 char *canon_name
= cp_canonicalize_string (name
);
16906 if (canon_name
!= NULL
)
16908 if (strcmp (canon_name
, name
) != 0)
16909 name
= obsavestring (canon_name
, strlen (canon_name
),
16911 xfree (canon_name
);
16918 /* Get name of a die, return NULL if not found. */
16920 static const char *
16921 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
16923 struct attribute
*attr
;
16925 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
16926 if ((!attr
|| !DW_STRING (attr
))
16927 && die
->tag
!= DW_TAG_class_type
16928 && die
->tag
!= DW_TAG_interface_type
16929 && die
->tag
!= DW_TAG_structure_type
16930 && die
->tag
!= DW_TAG_union_type
)
16935 case DW_TAG_compile_unit
:
16936 case DW_TAG_partial_unit
:
16937 /* Compilation units have a DW_AT_name that is a filename, not
16938 a source language identifier. */
16939 case DW_TAG_enumeration_type
:
16940 case DW_TAG_enumerator
:
16941 /* These tags always have simple identifiers already; no need
16942 to canonicalize them. */
16943 return DW_STRING (attr
);
16945 case DW_TAG_subprogram
:
16946 /* Java constructors will all be named "<init>", so return
16947 the class name when we see this special case. */
16948 if (cu
->language
== language_java
16949 && DW_STRING (attr
) != NULL
16950 && strcmp (DW_STRING (attr
), "<init>") == 0)
16952 struct dwarf2_cu
*spec_cu
= cu
;
16953 struct die_info
*spec_die
;
16955 /* GCJ will output '<init>' for Java constructor names.
16956 For this special case, return the name of the parent class. */
16958 /* GCJ may output suprogram DIEs with AT_specification set.
16959 If so, use the name of the specified DIE. */
16960 spec_die
= die_specification (die
, &spec_cu
);
16961 if (spec_die
!= NULL
)
16962 return dwarf2_name (spec_die
, spec_cu
);
16967 if (die
->tag
== DW_TAG_class_type
)
16968 return dwarf2_name (die
, cu
);
16970 while (die
->tag
!= DW_TAG_compile_unit
16971 && die
->tag
!= DW_TAG_partial_unit
);
16975 case DW_TAG_class_type
:
16976 case DW_TAG_interface_type
:
16977 case DW_TAG_structure_type
:
16978 case DW_TAG_union_type
:
16979 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
16980 structures or unions. These were of the form "._%d" in GCC 4.1,
16981 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
16982 and GCC 4.4. We work around this problem by ignoring these. */
16983 if (attr
&& DW_STRING (attr
)
16984 && (strncmp (DW_STRING (attr
), "._", 2) == 0
16985 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
16988 /* GCC might emit a nameless typedef that has a linkage name. See
16989 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16990 if (!attr
|| DW_STRING (attr
) == NULL
)
16992 char *demangled
= NULL
;
16994 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
16996 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
16998 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
17001 /* Avoid demangling DW_STRING (attr) the second time on a second
17002 call for the same DIE. */
17003 if (!DW_STRING_IS_CANONICAL (attr
))
17004 demangled
= cplus_demangle (DW_STRING (attr
), DMGL_TYPES
);
17010 /* FIXME: we already did this for the partial symbol... */
17011 DW_STRING (attr
) = obsavestring (demangled
, strlen (demangled
),
17012 &cu
->objfile
->objfile_obstack
);
17013 DW_STRING_IS_CANONICAL (attr
) = 1;
17016 /* Strip any leading namespaces/classes, keep only the base name.
17017 DW_AT_name for named DIEs does not contain the prefixes. */
17018 base
= strrchr (DW_STRING (attr
), ':');
17019 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
17022 return DW_STRING (attr
);
17031 if (!DW_STRING_IS_CANONICAL (attr
))
17034 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
17035 &cu
->objfile
->objfile_obstack
);
17036 DW_STRING_IS_CANONICAL (attr
) = 1;
17038 return DW_STRING (attr
);
17041 /* Return the die that this die in an extension of, or NULL if there
17042 is none. *EXT_CU is the CU containing DIE on input, and the CU
17043 containing the return value on output. */
17045 static struct die_info
*
17046 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
17048 struct attribute
*attr
;
17050 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
17054 return follow_die_ref (die
, attr
, ext_cu
);
17057 /* Convert a DIE tag into its string name. */
17059 static const char *
17060 dwarf_tag_name (unsigned tag
)
17062 const char *name
= get_DW_TAG_name (tag
);
17065 return "DW_TAG_<unknown>";
17070 /* Convert a DWARF attribute code into its string name. */
17072 static const char *
17073 dwarf_attr_name (unsigned attr
)
17077 #ifdef MIPS /* collides with DW_AT_HP_block_index */
17078 if (attr
== DW_AT_MIPS_fde
)
17079 return "DW_AT_MIPS_fde";
17081 if (attr
== DW_AT_HP_block_index
)
17082 return "DW_AT_HP_block_index";
17085 name
= get_DW_AT_name (attr
);
17088 return "DW_AT_<unknown>";
17093 /* Convert a DWARF value form code into its string name. */
17095 static const char *
17096 dwarf_form_name (unsigned form
)
17098 const char *name
= get_DW_FORM_name (form
);
17101 return "DW_FORM_<unknown>";
17107 dwarf_bool_name (unsigned mybool
)
17115 /* Convert a DWARF type code into its string name. */
17117 static const char *
17118 dwarf_type_encoding_name (unsigned enc
)
17120 const char *name
= get_DW_ATE_name (enc
);
17123 return "DW_ATE_<unknown>";
17129 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
17133 print_spaces (indent
, f
);
17134 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
17135 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
17137 if (die
->parent
!= NULL
)
17139 print_spaces (indent
, f
);
17140 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
17141 die
->parent
->offset
.sect_off
);
17144 print_spaces (indent
, f
);
17145 fprintf_unfiltered (f
, " has children: %s\n",
17146 dwarf_bool_name (die
->child
!= NULL
));
17148 print_spaces (indent
, f
);
17149 fprintf_unfiltered (f
, " attributes:\n");
17151 for (i
= 0; i
< die
->num_attrs
; ++i
)
17153 print_spaces (indent
, f
);
17154 fprintf_unfiltered (f
, " %s (%s) ",
17155 dwarf_attr_name (die
->attrs
[i
].name
),
17156 dwarf_form_name (die
->attrs
[i
].form
));
17158 switch (die
->attrs
[i
].form
)
17161 case DW_FORM_GNU_addr_index
:
17162 fprintf_unfiltered (f
, "address: ");
17163 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
17165 case DW_FORM_block2
:
17166 case DW_FORM_block4
:
17167 case DW_FORM_block
:
17168 case DW_FORM_block1
:
17169 fprintf_unfiltered (f
, "block: size %s",
17170 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
17172 case DW_FORM_exprloc
:
17173 fprintf_unfiltered (f
, "expression: size %s",
17174 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
17176 case DW_FORM_ref_addr
:
17177 fprintf_unfiltered (f
, "ref address: ");
17178 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
17180 case DW_FORM_GNU_ref_alt
:
17181 fprintf_unfiltered (f
, "alt ref address: ");
17182 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
17188 case DW_FORM_ref_udata
:
17189 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
17190 (long) (DW_UNSND (&die
->attrs
[i
])));
17192 case DW_FORM_data1
:
17193 case DW_FORM_data2
:
17194 case DW_FORM_data4
:
17195 case DW_FORM_data8
:
17196 case DW_FORM_udata
:
17197 case DW_FORM_sdata
:
17198 fprintf_unfiltered (f
, "constant: %s",
17199 pulongest (DW_UNSND (&die
->attrs
[i
])));
17201 case DW_FORM_sec_offset
:
17202 fprintf_unfiltered (f
, "section offset: %s",
17203 pulongest (DW_UNSND (&die
->attrs
[i
])));
17205 case DW_FORM_ref_sig8
:
17206 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
17207 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
17208 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->per_cu
.offset
.sect_off
);
17210 fprintf_unfiltered (f
, "signatured type, offset: unknown");
17212 case DW_FORM_string
:
17214 case DW_FORM_GNU_str_index
:
17215 case DW_FORM_GNU_strp_alt
:
17216 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
17217 DW_STRING (&die
->attrs
[i
])
17218 ? DW_STRING (&die
->attrs
[i
]) : "",
17219 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
17222 if (DW_UNSND (&die
->attrs
[i
]))
17223 fprintf_unfiltered (f
, "flag: TRUE");
17225 fprintf_unfiltered (f
, "flag: FALSE");
17227 case DW_FORM_flag_present
:
17228 fprintf_unfiltered (f
, "flag: TRUE");
17230 case DW_FORM_indirect
:
17231 /* The reader will have reduced the indirect form to
17232 the "base form" so this form should not occur. */
17233 fprintf_unfiltered (f
,
17234 "unexpected attribute form: DW_FORM_indirect");
17237 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
17238 die
->attrs
[i
].form
);
17241 fprintf_unfiltered (f
, "\n");
17246 dump_die_for_error (struct die_info
*die
)
17248 dump_die_shallow (gdb_stderr
, 0, die
);
17252 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
17254 int indent
= level
* 4;
17256 gdb_assert (die
!= NULL
);
17258 if (level
>= max_level
)
17261 dump_die_shallow (f
, indent
, die
);
17263 if (die
->child
!= NULL
)
17265 print_spaces (indent
, f
);
17266 fprintf_unfiltered (f
, " Children:");
17267 if (level
+ 1 < max_level
)
17269 fprintf_unfiltered (f
, "\n");
17270 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
17274 fprintf_unfiltered (f
,
17275 " [not printed, max nesting level reached]\n");
17279 if (die
->sibling
!= NULL
&& level
> 0)
17281 dump_die_1 (f
, level
, max_level
, die
->sibling
);
17285 /* This is called from the pdie macro in gdbinit.in.
17286 It's not static so gcc will keep a copy callable from gdb. */
17289 dump_die (struct die_info
*die
, int max_level
)
17291 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
17295 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
17299 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
17305 /* DW_ADDR is always stored already as sect_offset; despite for the forms
17306 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
17309 is_ref_attr (struct attribute
*attr
)
17311 switch (attr
->form
)
17313 case DW_FORM_ref_addr
:
17318 case DW_FORM_ref_udata
:
17319 case DW_FORM_GNU_ref_alt
:
17326 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
17330 dwarf2_get_ref_die_offset (struct attribute
*attr
)
17332 sect_offset retval
= { DW_UNSND (attr
) };
17334 if (is_ref_attr (attr
))
17337 retval
.sect_off
= 0;
17338 complaint (&symfile_complaints
,
17339 _("unsupported die ref attribute form: '%s'"),
17340 dwarf_form_name (attr
->form
));
17344 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
17345 * the value held by the attribute is not constant. */
17348 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
17350 if (attr
->form
== DW_FORM_sdata
)
17351 return DW_SND (attr
);
17352 else if (attr
->form
== DW_FORM_udata
17353 || attr
->form
== DW_FORM_data1
17354 || attr
->form
== DW_FORM_data2
17355 || attr
->form
== DW_FORM_data4
17356 || attr
->form
== DW_FORM_data8
)
17357 return DW_UNSND (attr
);
17360 complaint (&symfile_complaints
,
17361 _("Attribute value is not a constant (%s)"),
17362 dwarf_form_name (attr
->form
));
17363 return default_value
;
17367 /* Follow reference or signature attribute ATTR of SRC_DIE.
17368 On entry *REF_CU is the CU of SRC_DIE.
17369 On exit *REF_CU is the CU of the result. */
17371 static struct die_info
*
17372 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
17373 struct dwarf2_cu
**ref_cu
)
17375 struct die_info
*die
;
17377 if (is_ref_attr (attr
))
17378 die
= follow_die_ref (src_die
, attr
, ref_cu
);
17379 else if (attr
->form
== DW_FORM_ref_sig8
)
17380 die
= follow_die_sig (src_die
, attr
, ref_cu
);
17383 dump_die_for_error (src_die
);
17384 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
17385 (*ref_cu
)->objfile
->name
);
17391 /* Follow reference OFFSET.
17392 On entry *REF_CU is the CU of the source die referencing OFFSET.
17393 On exit *REF_CU is the CU of the result.
17394 Returns NULL if OFFSET is invalid. */
17396 static struct die_info
*
17397 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
17398 struct dwarf2_cu
**ref_cu
)
17400 struct die_info temp_die
;
17401 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
17403 gdb_assert (cu
->per_cu
!= NULL
);
17407 if (cu
->per_cu
->is_debug_types
)
17409 /* .debug_types CUs cannot reference anything outside their CU.
17410 If they need to, they have to reference a signatured type via
17411 DW_FORM_ref_sig8. */
17412 if (! offset_in_cu_p (&cu
->header
, offset
))
17415 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
17416 || ! offset_in_cu_p (&cu
->header
, offset
))
17418 struct dwarf2_per_cu_data
*per_cu
;
17420 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
17423 /* If necessary, add it to the queue and load its DIEs. */
17424 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
17425 load_full_comp_unit (per_cu
, cu
->language
);
17427 target_cu
= per_cu
->cu
;
17429 else if (cu
->dies
== NULL
)
17431 /* We're loading full DIEs during partial symbol reading. */
17432 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
17433 load_full_comp_unit (cu
->per_cu
, language_minimal
);
17436 *ref_cu
= target_cu
;
17437 temp_die
.offset
= offset
;
17438 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
17441 /* Follow reference attribute ATTR of SRC_DIE.
17442 On entry *REF_CU is the CU of SRC_DIE.
17443 On exit *REF_CU is the CU of the result. */
17445 static struct die_info
*
17446 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
17447 struct dwarf2_cu
**ref_cu
)
17449 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
17450 struct dwarf2_cu
*cu
= *ref_cu
;
17451 struct die_info
*die
;
17453 die
= follow_die_offset (offset
,
17454 (attr
->form
== DW_FORM_GNU_ref_alt
17455 || cu
->per_cu
->is_dwz
),
17458 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
17459 "at 0x%x [in module %s]"),
17460 offset
.sect_off
, src_die
->offset
.sect_off
, cu
->objfile
->name
);
17465 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
17466 Returned value is intended for DW_OP_call*. Returned
17467 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
17469 struct dwarf2_locexpr_baton
17470 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
17471 struct dwarf2_per_cu_data
*per_cu
,
17472 CORE_ADDR (*get_frame_pc
) (void *baton
),
17475 struct dwarf2_cu
*cu
;
17476 struct die_info
*die
;
17477 struct attribute
*attr
;
17478 struct dwarf2_locexpr_baton retval
;
17480 dw2_setup (per_cu
->objfile
);
17482 if (per_cu
->cu
== NULL
)
17486 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
17488 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
17489 offset
.sect_off
, per_cu
->objfile
->name
);
17491 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
17494 /* DWARF: "If there is no such attribute, then there is no effect.".
17495 DATA is ignored if SIZE is 0. */
17497 retval
.data
= NULL
;
17500 else if (attr_form_is_section_offset (attr
))
17502 struct dwarf2_loclist_baton loclist_baton
;
17503 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
17506 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
17508 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
17510 retval
.size
= size
;
17514 if (!attr_form_is_block (attr
))
17515 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
17516 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
17517 offset
.sect_off
, per_cu
->objfile
->name
);
17519 retval
.data
= DW_BLOCK (attr
)->data
;
17520 retval
.size
= DW_BLOCK (attr
)->size
;
17522 retval
.per_cu
= cu
->per_cu
;
17524 age_cached_comp_units ();
17529 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
17532 struct dwarf2_locexpr_baton
17533 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
17534 struct dwarf2_per_cu_data
*per_cu
,
17535 CORE_ADDR (*get_frame_pc
) (void *baton
),
17538 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
17540 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
17543 /* Return the type of the DIE at DIE_OFFSET in the CU named by
17547 dwarf2_get_die_type (cu_offset die_offset
,
17548 struct dwarf2_per_cu_data
*per_cu
)
17550 sect_offset die_offset_sect
;
17552 dw2_setup (per_cu
->objfile
);
17554 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
17555 return get_die_type_at_offset (die_offset_sect
, per_cu
);
17558 /* Follow the signature attribute ATTR in SRC_DIE.
17559 On entry *REF_CU is the CU of SRC_DIE.
17560 On exit *REF_CU is the CU of the result. */
17562 static struct die_info
*
17563 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
17564 struct dwarf2_cu
**ref_cu
)
17566 struct objfile
*objfile
= (*ref_cu
)->objfile
;
17567 struct die_info temp_die
;
17568 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
17569 struct dwarf2_cu
*sig_cu
;
17570 struct die_info
*die
;
17572 /* sig_type will be NULL if the signatured type is missing from
17574 if (sig_type
== NULL
)
17575 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
17576 "at 0x%x [in module %s]"),
17577 src_die
->offset
.sect_off
, objfile
->name
);
17579 /* If necessary, add it to the queue and load its DIEs. */
17581 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
17582 read_signatured_type (sig_type
);
17584 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
17586 sig_cu
= sig_type
->per_cu
.cu
;
17587 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
17588 temp_die
.offset
= sig_type
->type_offset_in_section
;
17589 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
17590 temp_die
.offset
.sect_off
);
17597 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
17598 "from DIE at 0x%x [in module %s]"),
17599 temp_die
.offset
.sect_off
, src_die
->offset
.sect_off
, objfile
->name
);
17602 /* Given an offset of a signatured type, return its signatured_type. */
17604 static struct signatured_type
*
17605 lookup_signatured_type_at_offset (struct objfile
*objfile
,
17606 struct dwarf2_section_info
*section
,
17607 sect_offset offset
)
17609 gdb_byte
*info_ptr
= section
->buffer
+ offset
.sect_off
;
17610 unsigned int length
, initial_length_size
;
17611 unsigned int sig_offset
;
17612 struct signatured_type find_entry
, *sig_type
;
17614 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
17615 sig_offset
= (initial_length_size
17617 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
17618 + 1 /*address_size*/);
17619 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
17620 sig_type
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
17622 /* This is only used to lookup previously recorded types.
17623 If we didn't find it, it's our bug. */
17624 gdb_assert (sig_type
!= NULL
);
17625 gdb_assert (offset
.sect_off
== sig_type
->per_cu
.offset
.sect_off
);
17630 /* Load the DIEs associated with type unit PER_CU into memory. */
17633 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
17635 struct signatured_type
*sig_type
;
17637 /* Caller is responsible for ensuring type_unit_groups don't get here. */
17638 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
17640 /* We have the per_cu, but we need the signatured_type.
17641 Fortunately this is an easy translation. */
17642 gdb_assert (per_cu
->is_debug_types
);
17643 sig_type
= (struct signatured_type
*) per_cu
;
17645 gdb_assert (per_cu
->cu
== NULL
);
17647 read_signatured_type (sig_type
);
17649 gdb_assert (per_cu
->cu
!= NULL
);
17652 /* die_reader_func for read_signatured_type.
17653 This is identical to load_full_comp_unit_reader,
17654 but is kept separate for now. */
17657 read_signatured_type_reader (const struct die_reader_specs
*reader
,
17658 gdb_byte
*info_ptr
,
17659 struct die_info
*comp_unit_die
,
17663 struct dwarf2_cu
*cu
= reader
->cu
;
17665 gdb_assert (cu
->die_hash
== NULL
);
17667 htab_create_alloc_ex (cu
->header
.length
/ 12,
17671 &cu
->comp_unit_obstack
,
17672 hashtab_obstack_allocate
,
17673 dummy_obstack_deallocate
);
17676 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
17677 &info_ptr
, comp_unit_die
);
17678 cu
->dies
= comp_unit_die
;
17679 /* comp_unit_die is not stored in die_hash, no need. */
17681 /* We try not to read any attributes in this function, because not
17682 all CUs needed for references have been loaded yet, and symbol
17683 table processing isn't initialized. But we have to set the CU language,
17684 or we won't be able to build types correctly.
17685 Similarly, if we do not read the producer, we can not apply
17686 producer-specific interpretation. */
17687 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
17690 /* Read in a signatured type and build its CU and DIEs.
17691 If the type is a stub for the real type in a DWO file,
17692 read in the real type from the DWO file as well. */
17695 read_signatured_type (struct signatured_type
*sig_type
)
17697 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
17699 gdb_assert (per_cu
->is_debug_types
);
17700 gdb_assert (per_cu
->cu
== NULL
);
17702 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
17703 read_signatured_type_reader
, NULL
);
17706 /* Decode simple location descriptions.
17707 Given a pointer to a dwarf block that defines a location, compute
17708 the location and return the value.
17710 NOTE drow/2003-11-18: This function is called in two situations
17711 now: for the address of static or global variables (partial symbols
17712 only) and for offsets into structures which are expected to be
17713 (more or less) constant. The partial symbol case should go away,
17714 and only the constant case should remain. That will let this
17715 function complain more accurately. A few special modes are allowed
17716 without complaint for global variables (for instance, global
17717 register values and thread-local values).
17719 A location description containing no operations indicates that the
17720 object is optimized out. The return value is 0 for that case.
17721 FIXME drow/2003-11-16: No callers check for this case any more; soon all
17722 callers will only want a very basic result and this can become a
17725 Note that stack[0] is unused except as a default error return. */
17728 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
17730 struct objfile
*objfile
= cu
->objfile
;
17732 size_t size
= blk
->size
;
17733 gdb_byte
*data
= blk
->data
;
17734 CORE_ADDR stack
[64];
17736 unsigned int bytes_read
, unsnd
;
17742 stack
[++stacki
] = 0;
17781 stack
[++stacki
] = op
- DW_OP_lit0
;
17816 stack
[++stacki
] = op
- DW_OP_reg0
;
17818 dwarf2_complex_location_expr_complaint ();
17822 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
17824 stack
[++stacki
] = unsnd
;
17826 dwarf2_complex_location_expr_complaint ();
17830 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
17835 case DW_OP_const1u
:
17836 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
17840 case DW_OP_const1s
:
17841 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
17845 case DW_OP_const2u
:
17846 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
17850 case DW_OP_const2s
:
17851 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
17855 case DW_OP_const4u
:
17856 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
17860 case DW_OP_const4s
:
17861 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
17865 case DW_OP_const8u
:
17866 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
17871 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
17877 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
17882 stack
[stacki
+ 1] = stack
[stacki
];
17887 stack
[stacki
- 1] += stack
[stacki
];
17891 case DW_OP_plus_uconst
:
17892 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
17898 stack
[stacki
- 1] -= stack
[stacki
];
17903 /* If we're not the last op, then we definitely can't encode
17904 this using GDB's address_class enum. This is valid for partial
17905 global symbols, although the variable's address will be bogus
17908 dwarf2_complex_location_expr_complaint ();
17911 case DW_OP_GNU_push_tls_address
:
17912 /* The top of the stack has the offset from the beginning
17913 of the thread control block at which the variable is located. */
17914 /* Nothing should follow this operator, so the top of stack would
17916 /* This is valid for partial global symbols, but the variable's
17917 address will be bogus in the psymtab. Make it always at least
17918 non-zero to not look as a variable garbage collected by linker
17919 which have DW_OP_addr 0. */
17921 dwarf2_complex_location_expr_complaint ();
17925 case DW_OP_GNU_uninit
:
17928 case DW_OP_GNU_addr_index
:
17929 case DW_OP_GNU_const_index
:
17930 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
17937 const char *name
= get_DW_OP_name (op
);
17940 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
17943 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
17947 return (stack
[stacki
]);
17950 /* Enforce maximum stack depth of SIZE-1 to avoid writing
17951 outside of the allocated space. Also enforce minimum>0. */
17952 if (stacki
>= ARRAY_SIZE (stack
) - 1)
17954 complaint (&symfile_complaints
,
17955 _("location description stack overflow"));
17961 complaint (&symfile_complaints
,
17962 _("location description stack underflow"));
17966 return (stack
[stacki
]);
17969 /* memory allocation interface */
17971 static struct dwarf_block
*
17972 dwarf_alloc_block (struct dwarf2_cu
*cu
)
17974 struct dwarf_block
*blk
;
17976 blk
= (struct dwarf_block
*)
17977 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
17981 static struct die_info
*
17982 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
17984 struct die_info
*die
;
17985 size_t size
= sizeof (struct die_info
);
17988 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
17990 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
17991 memset (die
, 0, sizeof (struct die_info
));
17996 /* Macro support. */
17998 /* Return the full name of file number I in *LH's file name table.
17999 Use COMP_DIR as the name of the current directory of the
18000 compilation. The result is allocated using xmalloc; the caller is
18001 responsible for freeing it. */
18003 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
18005 /* Is the file number a valid index into the line header's file name
18006 table? Remember that file numbers start with one, not zero. */
18007 if (1 <= file
&& file
<= lh
->num_file_names
)
18009 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
18011 if (IS_ABSOLUTE_PATH (fe
->name
))
18012 return xstrdup (fe
->name
);
18020 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18026 dir_len
= strlen (dir
);
18027 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
18028 strcpy (full_name
, dir
);
18029 full_name
[dir_len
] = '/';
18030 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
18034 return xstrdup (fe
->name
);
18039 /* The compiler produced a bogus file number. We can at least
18040 record the macro definitions made in the file, even if we
18041 won't be able to find the file by name. */
18042 char fake_name
[80];
18044 xsnprintf (fake_name
, sizeof (fake_name
),
18045 "<bad macro file number %d>", file
);
18047 complaint (&symfile_complaints
,
18048 _("bad file number in macro information (%d)"),
18051 return xstrdup (fake_name
);
18056 static struct macro_source_file
*
18057 macro_start_file (int file
, int line
,
18058 struct macro_source_file
*current_file
,
18059 const char *comp_dir
,
18060 struct line_header
*lh
, struct objfile
*objfile
)
18062 /* The full name of this source file. */
18063 char *full_name
= file_full_name (file
, lh
, comp_dir
);
18065 /* We don't create a macro table for this compilation unit
18066 at all until we actually get a filename. */
18067 if (! pending_macros
)
18068 pending_macros
= new_macro_table (&objfile
->per_bfd
->storage_obstack
,
18069 objfile
->per_bfd
->macro_cache
);
18071 if (! current_file
)
18073 /* If we have no current file, then this must be the start_file
18074 directive for the compilation unit's main source file. */
18075 current_file
= macro_set_main (pending_macros
, full_name
);
18076 macro_define_special (pending_macros
);
18079 current_file
= macro_include (current_file
, line
, full_name
);
18083 return current_file
;
18087 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
18088 followed by a null byte. */
18090 copy_string (const char *buf
, int len
)
18092 char *s
= xmalloc (len
+ 1);
18094 memcpy (s
, buf
, len
);
18100 static const char *
18101 consume_improper_spaces (const char *p
, const char *body
)
18105 complaint (&symfile_complaints
,
18106 _("macro definition contains spaces "
18107 "in formal argument list:\n`%s'"),
18119 parse_macro_definition (struct macro_source_file
*file
, int line
,
18124 /* The body string takes one of two forms. For object-like macro
18125 definitions, it should be:
18127 <macro name> " " <definition>
18129 For function-like macro definitions, it should be:
18131 <macro name> "() " <definition>
18133 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
18135 Spaces may appear only where explicitly indicated, and in the
18138 The Dwarf 2 spec says that an object-like macro's name is always
18139 followed by a space, but versions of GCC around March 2002 omit
18140 the space when the macro's definition is the empty string.
18142 The Dwarf 2 spec says that there should be no spaces between the
18143 formal arguments in a function-like macro's formal argument list,
18144 but versions of GCC around March 2002 include spaces after the
18148 /* Find the extent of the macro name. The macro name is terminated
18149 by either a space or null character (for an object-like macro) or
18150 an opening paren (for a function-like macro). */
18151 for (p
= body
; *p
; p
++)
18152 if (*p
== ' ' || *p
== '(')
18155 if (*p
== ' ' || *p
== '\0')
18157 /* It's an object-like macro. */
18158 int name_len
= p
- body
;
18159 char *name
= copy_string (body
, name_len
);
18160 const char *replacement
;
18163 replacement
= body
+ name_len
+ 1;
18166 dwarf2_macro_malformed_definition_complaint (body
);
18167 replacement
= body
+ name_len
;
18170 macro_define_object (file
, line
, name
, replacement
);
18174 else if (*p
== '(')
18176 /* It's a function-like macro. */
18177 char *name
= copy_string (body
, p
- body
);
18180 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
18184 p
= consume_improper_spaces (p
, body
);
18186 /* Parse the formal argument list. */
18187 while (*p
&& *p
!= ')')
18189 /* Find the extent of the current argument name. */
18190 const char *arg_start
= p
;
18192 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
18195 if (! *p
|| p
== arg_start
)
18196 dwarf2_macro_malformed_definition_complaint (body
);
18199 /* Make sure argv has room for the new argument. */
18200 if (argc
>= argv_size
)
18203 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
18206 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
18209 p
= consume_improper_spaces (p
, body
);
18211 /* Consume the comma, if present. */
18216 p
= consume_improper_spaces (p
, body
);
18225 /* Perfectly formed definition, no complaints. */
18226 macro_define_function (file
, line
, name
,
18227 argc
, (const char **) argv
,
18229 else if (*p
== '\0')
18231 /* Complain, but do define it. */
18232 dwarf2_macro_malformed_definition_complaint (body
);
18233 macro_define_function (file
, line
, name
,
18234 argc
, (const char **) argv
,
18238 /* Just complain. */
18239 dwarf2_macro_malformed_definition_complaint (body
);
18242 /* Just complain. */
18243 dwarf2_macro_malformed_definition_complaint (body
);
18249 for (i
= 0; i
< argc
; i
++)
18255 dwarf2_macro_malformed_definition_complaint (body
);
18258 /* Skip some bytes from BYTES according to the form given in FORM.
18259 Returns the new pointer. */
18262 skip_form_bytes (bfd
*abfd
, gdb_byte
*bytes
, gdb_byte
*buffer_end
,
18263 enum dwarf_form form
,
18264 unsigned int offset_size
,
18265 struct dwarf2_section_info
*section
)
18267 unsigned int bytes_read
;
18271 case DW_FORM_data1
:
18276 case DW_FORM_data2
:
18280 case DW_FORM_data4
:
18284 case DW_FORM_data8
:
18288 case DW_FORM_string
:
18289 read_direct_string (abfd
, bytes
, &bytes_read
);
18290 bytes
+= bytes_read
;
18293 case DW_FORM_sec_offset
:
18295 case DW_FORM_GNU_strp_alt
:
18296 bytes
+= offset_size
;
18299 case DW_FORM_block
:
18300 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
18301 bytes
+= bytes_read
;
18304 case DW_FORM_block1
:
18305 bytes
+= 1 + read_1_byte (abfd
, bytes
);
18307 case DW_FORM_block2
:
18308 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
18310 case DW_FORM_block4
:
18311 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
18314 case DW_FORM_sdata
:
18315 case DW_FORM_udata
:
18316 case DW_FORM_GNU_addr_index
:
18317 case DW_FORM_GNU_str_index
:
18318 bytes
= (gdb_byte
*) gdb_skip_leb128 (bytes
, buffer_end
);
18321 dwarf2_section_buffer_overflow_complaint (section
);
18329 complaint (&symfile_complaints
,
18330 _("invalid form 0x%x in `%s'"),
18332 section
->asection
->name
);
18340 /* A helper for dwarf_decode_macros that handles skipping an unknown
18341 opcode. Returns an updated pointer to the macro data buffer; or,
18342 on error, issues a complaint and returns NULL. */
18345 skip_unknown_opcode (unsigned int opcode
,
18346 gdb_byte
**opcode_definitions
,
18347 gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
18349 unsigned int offset_size
,
18350 struct dwarf2_section_info
*section
)
18352 unsigned int bytes_read
, i
;
18356 if (opcode_definitions
[opcode
] == NULL
)
18358 complaint (&symfile_complaints
,
18359 _("unrecognized DW_MACFINO opcode 0x%x"),
18364 defn
= opcode_definitions
[opcode
];
18365 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
18366 defn
+= bytes_read
;
18368 for (i
= 0; i
< arg
; ++i
)
18370 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
18372 if (mac_ptr
== NULL
)
18374 /* skip_form_bytes already issued the complaint. */
18382 /* A helper function which parses the header of a macro section.
18383 If the macro section is the extended (for now called "GNU") type,
18384 then this updates *OFFSET_SIZE. Returns a pointer to just after
18385 the header, or issues a complaint and returns NULL on error. */
18388 dwarf_parse_macro_header (gdb_byte
**opcode_definitions
,
18391 unsigned int *offset_size
,
18392 int section_is_gnu
)
18394 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
18396 if (section_is_gnu
)
18398 unsigned int version
, flags
;
18400 version
= read_2_bytes (abfd
, mac_ptr
);
18403 complaint (&symfile_complaints
,
18404 _("unrecognized version `%d' in .debug_macro section"),
18410 flags
= read_1_byte (abfd
, mac_ptr
);
18412 *offset_size
= (flags
& 1) ? 8 : 4;
18414 if ((flags
& 2) != 0)
18415 /* We don't need the line table offset. */
18416 mac_ptr
+= *offset_size
;
18418 /* Vendor opcode descriptions. */
18419 if ((flags
& 4) != 0)
18421 unsigned int i
, count
;
18423 count
= read_1_byte (abfd
, mac_ptr
);
18425 for (i
= 0; i
< count
; ++i
)
18427 unsigned int opcode
, bytes_read
;
18430 opcode
= read_1_byte (abfd
, mac_ptr
);
18432 opcode_definitions
[opcode
] = mac_ptr
;
18433 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18434 mac_ptr
+= bytes_read
;
18443 /* A helper for dwarf_decode_macros that handles the GNU extensions,
18444 including DW_MACRO_GNU_transparent_include. */
18447 dwarf_decode_macro_bytes (bfd
*abfd
, gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
18448 struct macro_source_file
*current_file
,
18449 struct line_header
*lh
, const char *comp_dir
,
18450 struct dwarf2_section_info
*section
,
18451 int section_is_gnu
, int section_is_dwz
,
18452 unsigned int offset_size
,
18453 struct objfile
*objfile
,
18454 htab_t include_hash
)
18456 enum dwarf_macro_record_type macinfo_type
;
18457 int at_commandline
;
18458 gdb_byte
*opcode_definitions
[256];
18460 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
18461 &offset_size
, section_is_gnu
);
18462 if (mac_ptr
== NULL
)
18464 /* We already issued a complaint. */
18468 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
18469 GDB is still reading the definitions from command line. First
18470 DW_MACINFO_start_file will need to be ignored as it was already executed
18471 to create CURRENT_FILE for the main source holding also the command line
18472 definitions. On first met DW_MACINFO_start_file this flag is reset to
18473 normally execute all the remaining DW_MACINFO_start_file macinfos. */
18475 at_commandline
= 1;
18479 /* Do we at least have room for a macinfo type byte? */
18480 if (mac_ptr
>= mac_end
)
18482 dwarf2_section_buffer_overflow_complaint (section
);
18486 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
18489 /* Note that we rely on the fact that the corresponding GNU and
18490 DWARF constants are the same. */
18491 switch (macinfo_type
)
18493 /* A zero macinfo type indicates the end of the macro
18498 case DW_MACRO_GNU_define
:
18499 case DW_MACRO_GNU_undef
:
18500 case DW_MACRO_GNU_define_indirect
:
18501 case DW_MACRO_GNU_undef_indirect
:
18502 case DW_MACRO_GNU_define_indirect_alt
:
18503 case DW_MACRO_GNU_undef_indirect_alt
:
18505 unsigned int bytes_read
;
18510 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18511 mac_ptr
+= bytes_read
;
18513 if (macinfo_type
== DW_MACRO_GNU_define
18514 || macinfo_type
== DW_MACRO_GNU_undef
)
18516 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18517 mac_ptr
+= bytes_read
;
18521 LONGEST str_offset
;
18523 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
18524 mac_ptr
+= offset_size
;
18526 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
18527 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
18530 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
18532 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
18535 body
= read_indirect_string_at_offset (abfd
, str_offset
);
18538 is_define
= (macinfo_type
== DW_MACRO_GNU_define
18539 || macinfo_type
== DW_MACRO_GNU_define_indirect
18540 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
18541 if (! current_file
)
18543 /* DWARF violation as no main source is present. */
18544 complaint (&symfile_complaints
,
18545 _("debug info with no main source gives macro %s "
18547 is_define
? _("definition") : _("undefinition"),
18551 if ((line
== 0 && !at_commandline
)
18552 || (line
!= 0 && at_commandline
))
18553 complaint (&symfile_complaints
,
18554 _("debug info gives %s macro %s with %s line %d: %s"),
18555 at_commandline
? _("command-line") : _("in-file"),
18556 is_define
? _("definition") : _("undefinition"),
18557 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
18560 parse_macro_definition (current_file
, line
, body
);
18563 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
18564 || macinfo_type
== DW_MACRO_GNU_undef_indirect
18565 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
18566 macro_undef (current_file
, line
, body
);
18571 case DW_MACRO_GNU_start_file
:
18573 unsigned int bytes_read
;
18576 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18577 mac_ptr
+= bytes_read
;
18578 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18579 mac_ptr
+= bytes_read
;
18581 if ((line
== 0 && !at_commandline
)
18582 || (line
!= 0 && at_commandline
))
18583 complaint (&symfile_complaints
,
18584 _("debug info gives source %d included "
18585 "from %s at %s line %d"),
18586 file
, at_commandline
? _("command-line") : _("file"),
18587 line
== 0 ? _("zero") : _("non-zero"), line
);
18589 if (at_commandline
)
18591 /* This DW_MACRO_GNU_start_file was executed in the
18593 at_commandline
= 0;
18596 current_file
= macro_start_file (file
, line
,
18597 current_file
, comp_dir
,
18602 case DW_MACRO_GNU_end_file
:
18603 if (! current_file
)
18604 complaint (&symfile_complaints
,
18605 _("macro debug info has an unmatched "
18606 "`close_file' directive"));
18609 current_file
= current_file
->included_by
;
18610 if (! current_file
)
18612 enum dwarf_macro_record_type next_type
;
18614 /* GCC circa March 2002 doesn't produce the zero
18615 type byte marking the end of the compilation
18616 unit. Complain if it's not there, but exit no
18619 /* Do we at least have room for a macinfo type byte? */
18620 if (mac_ptr
>= mac_end
)
18622 dwarf2_section_buffer_overflow_complaint (section
);
18626 /* We don't increment mac_ptr here, so this is just
18628 next_type
= read_1_byte (abfd
, mac_ptr
);
18629 if (next_type
!= 0)
18630 complaint (&symfile_complaints
,
18631 _("no terminating 0-type entry for "
18632 "macros in `.debug_macinfo' section"));
18639 case DW_MACRO_GNU_transparent_include
:
18640 case DW_MACRO_GNU_transparent_include_alt
:
18644 bfd
*include_bfd
= abfd
;
18645 struct dwarf2_section_info
*include_section
= section
;
18646 struct dwarf2_section_info alt_section
;
18647 gdb_byte
*include_mac_end
= mac_end
;
18648 int is_dwz
= section_is_dwz
;
18649 gdb_byte
*new_mac_ptr
;
18651 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
18652 mac_ptr
+= offset_size
;
18654 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
18656 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
18658 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
18661 include_bfd
= dwz
->macro
.asection
->owner
;
18662 include_section
= &dwz
->macro
;
18663 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
18667 new_mac_ptr
= include_section
->buffer
+ offset
;
18668 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
18672 /* This has actually happened; see
18673 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
18674 complaint (&symfile_complaints
,
18675 _("recursive DW_MACRO_GNU_transparent_include in "
18676 ".debug_macro section"));
18680 *slot
= new_mac_ptr
;
18682 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
18683 include_mac_end
, current_file
,
18685 section
, section_is_gnu
, is_dwz
,
18686 offset_size
, objfile
, include_hash
);
18688 htab_remove_elt (include_hash
, new_mac_ptr
);
18693 case DW_MACINFO_vendor_ext
:
18694 if (!section_is_gnu
)
18696 unsigned int bytes_read
;
18699 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18700 mac_ptr
+= bytes_read
;
18701 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18702 mac_ptr
+= bytes_read
;
18704 /* We don't recognize any vendor extensions. */
18710 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
18711 mac_ptr
, mac_end
, abfd
, offset_size
,
18713 if (mac_ptr
== NULL
)
18717 } while (macinfo_type
!= 0);
18721 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
18722 const char *comp_dir
, int section_is_gnu
)
18724 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18725 struct line_header
*lh
= cu
->line_header
;
18727 gdb_byte
*mac_ptr
, *mac_end
;
18728 struct macro_source_file
*current_file
= 0;
18729 enum dwarf_macro_record_type macinfo_type
;
18730 unsigned int offset_size
= cu
->header
.offset_size
;
18731 gdb_byte
*opcode_definitions
[256];
18732 struct cleanup
*cleanup
;
18733 htab_t include_hash
;
18735 struct dwarf2_section_info
*section
;
18736 const char *section_name
;
18738 if (cu
->dwo_unit
!= NULL
)
18740 if (section_is_gnu
)
18742 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
18743 section_name
= ".debug_macro.dwo";
18747 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
18748 section_name
= ".debug_macinfo.dwo";
18753 if (section_is_gnu
)
18755 section
= &dwarf2_per_objfile
->macro
;
18756 section_name
= ".debug_macro";
18760 section
= &dwarf2_per_objfile
->macinfo
;
18761 section_name
= ".debug_macinfo";
18765 dwarf2_read_section (objfile
, section
);
18766 if (section
->buffer
== NULL
)
18768 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
18771 abfd
= section
->asection
->owner
;
18773 /* First pass: Find the name of the base filename.
18774 This filename is needed in order to process all macros whose definition
18775 (or undefinition) comes from the command line. These macros are defined
18776 before the first DW_MACINFO_start_file entry, and yet still need to be
18777 associated to the base file.
18779 To determine the base file name, we scan the macro definitions until we
18780 reach the first DW_MACINFO_start_file entry. We then initialize
18781 CURRENT_FILE accordingly so that any macro definition found before the
18782 first DW_MACINFO_start_file can still be associated to the base file. */
18784 mac_ptr
= section
->buffer
+ offset
;
18785 mac_end
= section
->buffer
+ section
->size
;
18787 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
18788 &offset_size
, section_is_gnu
);
18789 if (mac_ptr
== NULL
)
18791 /* We already issued a complaint. */
18797 /* Do we at least have room for a macinfo type byte? */
18798 if (mac_ptr
>= mac_end
)
18800 /* Complaint is printed during the second pass as GDB will probably
18801 stop the first pass earlier upon finding
18802 DW_MACINFO_start_file. */
18806 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
18809 /* Note that we rely on the fact that the corresponding GNU and
18810 DWARF constants are the same. */
18811 switch (macinfo_type
)
18813 /* A zero macinfo type indicates the end of the macro
18818 case DW_MACRO_GNU_define
:
18819 case DW_MACRO_GNU_undef
:
18820 /* Only skip the data by MAC_PTR. */
18822 unsigned int bytes_read
;
18824 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18825 mac_ptr
+= bytes_read
;
18826 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18827 mac_ptr
+= bytes_read
;
18831 case DW_MACRO_GNU_start_file
:
18833 unsigned int bytes_read
;
18836 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18837 mac_ptr
+= bytes_read
;
18838 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18839 mac_ptr
+= bytes_read
;
18841 current_file
= macro_start_file (file
, line
, current_file
,
18842 comp_dir
, lh
, objfile
);
18846 case DW_MACRO_GNU_end_file
:
18847 /* No data to skip by MAC_PTR. */
18850 case DW_MACRO_GNU_define_indirect
:
18851 case DW_MACRO_GNU_undef_indirect
:
18852 case DW_MACRO_GNU_define_indirect_alt
:
18853 case DW_MACRO_GNU_undef_indirect_alt
:
18855 unsigned int bytes_read
;
18857 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18858 mac_ptr
+= bytes_read
;
18859 mac_ptr
+= offset_size
;
18863 case DW_MACRO_GNU_transparent_include
:
18864 case DW_MACRO_GNU_transparent_include_alt
:
18865 /* Note that, according to the spec, a transparent include
18866 chain cannot call DW_MACRO_GNU_start_file. So, we can just
18867 skip this opcode. */
18868 mac_ptr
+= offset_size
;
18871 case DW_MACINFO_vendor_ext
:
18872 /* Only skip the data by MAC_PTR. */
18873 if (!section_is_gnu
)
18875 unsigned int bytes_read
;
18877 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18878 mac_ptr
+= bytes_read
;
18879 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18880 mac_ptr
+= bytes_read
;
18885 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
18886 mac_ptr
, mac_end
, abfd
, offset_size
,
18888 if (mac_ptr
== NULL
)
18892 } while (macinfo_type
!= 0 && current_file
== NULL
);
18894 /* Second pass: Process all entries.
18896 Use the AT_COMMAND_LINE flag to determine whether we are still processing
18897 command-line macro definitions/undefinitions. This flag is unset when we
18898 reach the first DW_MACINFO_start_file entry. */
18900 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
18901 NULL
, xcalloc
, xfree
);
18902 cleanup
= make_cleanup_htab_delete (include_hash
);
18903 mac_ptr
= section
->buffer
+ offset
;
18904 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
18906 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
18907 current_file
, lh
, comp_dir
, section
,
18909 offset_size
, objfile
, include_hash
);
18910 do_cleanups (cleanup
);
18913 /* Check if the attribute's form is a DW_FORM_block*
18914 if so return true else false. */
18917 attr_form_is_block (struct attribute
*attr
)
18919 return (attr
== NULL
? 0 :
18920 attr
->form
== DW_FORM_block1
18921 || attr
->form
== DW_FORM_block2
18922 || attr
->form
== DW_FORM_block4
18923 || attr
->form
== DW_FORM_block
18924 || attr
->form
== DW_FORM_exprloc
);
18927 /* Return non-zero if ATTR's value is a section offset --- classes
18928 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
18929 You may use DW_UNSND (attr) to retrieve such offsets.
18931 Section 7.5.4, "Attribute Encodings", explains that no attribute
18932 may have a value that belongs to more than one of these classes; it
18933 would be ambiguous if we did, because we use the same forms for all
18937 attr_form_is_section_offset (struct attribute
*attr
)
18939 return (attr
->form
== DW_FORM_data4
18940 || attr
->form
== DW_FORM_data8
18941 || attr
->form
== DW_FORM_sec_offset
);
18944 /* Return non-zero if ATTR's value falls in the 'constant' class, or
18945 zero otherwise. When this function returns true, you can apply
18946 dwarf2_get_attr_constant_value to it.
18948 However, note that for some attributes you must check
18949 attr_form_is_section_offset before using this test. DW_FORM_data4
18950 and DW_FORM_data8 are members of both the constant class, and of
18951 the classes that contain offsets into other debug sections
18952 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
18953 that, if an attribute's can be either a constant or one of the
18954 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
18955 taken as section offsets, not constants. */
18958 attr_form_is_constant (struct attribute
*attr
)
18960 switch (attr
->form
)
18962 case DW_FORM_sdata
:
18963 case DW_FORM_udata
:
18964 case DW_FORM_data1
:
18965 case DW_FORM_data2
:
18966 case DW_FORM_data4
:
18967 case DW_FORM_data8
:
18974 /* Return the .debug_loc section to use for CU.
18975 For DWO files use .debug_loc.dwo. */
18977 static struct dwarf2_section_info
*
18978 cu_debug_loc_section (struct dwarf2_cu
*cu
)
18981 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
18982 return &dwarf2_per_objfile
->loc
;
18985 /* A helper function that fills in a dwarf2_loclist_baton. */
18988 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
18989 struct dwarf2_loclist_baton
*baton
,
18990 struct attribute
*attr
)
18992 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18994 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
18996 baton
->per_cu
= cu
->per_cu
;
18997 gdb_assert (baton
->per_cu
);
18998 /* We don't know how long the location list is, but make sure we
18999 don't run off the edge of the section. */
19000 baton
->size
= section
->size
- DW_UNSND (attr
);
19001 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
19002 baton
->base_address
= cu
->base_address
;
19003 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
19007 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
19008 struct dwarf2_cu
*cu
)
19010 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19011 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
19013 if (attr_form_is_section_offset (attr
)
19014 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
19015 the section. If so, fall through to the complaint in the
19017 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
19019 struct dwarf2_loclist_baton
*baton
;
19021 baton
= obstack_alloc (&objfile
->objfile_obstack
,
19022 sizeof (struct dwarf2_loclist_baton
));
19024 fill_in_loclist_baton (cu
, baton
, attr
);
19026 if (cu
->base_known
== 0)
19027 complaint (&symfile_complaints
,
19028 _("Location list used without "
19029 "specifying the CU base address."));
19031 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
19032 SYMBOL_LOCATION_BATON (sym
) = baton
;
19036 struct dwarf2_locexpr_baton
*baton
;
19038 baton
= obstack_alloc (&objfile
->objfile_obstack
,
19039 sizeof (struct dwarf2_locexpr_baton
));
19040 baton
->per_cu
= cu
->per_cu
;
19041 gdb_assert (baton
->per_cu
);
19043 if (attr_form_is_block (attr
))
19045 /* Note that we're just copying the block's data pointer
19046 here, not the actual data. We're still pointing into the
19047 info_buffer for SYM's objfile; right now we never release
19048 that buffer, but when we do clean up properly this may
19050 baton
->size
= DW_BLOCK (attr
)->size
;
19051 baton
->data
= DW_BLOCK (attr
)->data
;
19055 dwarf2_invalid_attrib_class_complaint ("location description",
19056 SYMBOL_NATURAL_NAME (sym
));
19060 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
19061 SYMBOL_LOCATION_BATON (sym
) = baton
;
19065 /* Return the OBJFILE associated with the compilation unit CU. If CU
19066 came from a separate debuginfo file, then the master objfile is
19070 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
19072 struct objfile
*objfile
= per_cu
->objfile
;
19074 /* Return the master objfile, so that we can report and look up the
19075 correct file containing this variable. */
19076 if (objfile
->separate_debug_objfile_backlink
)
19077 objfile
= objfile
->separate_debug_objfile_backlink
;
19082 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
19083 (CU_HEADERP is unused in such case) or prepare a temporary copy at
19084 CU_HEADERP first. */
19086 static const struct comp_unit_head
*
19087 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
19088 struct dwarf2_per_cu_data
*per_cu
)
19090 gdb_byte
*info_ptr
;
19093 return &per_cu
->cu
->header
;
19095 info_ptr
= per_cu
->info_or_types_section
->buffer
+ per_cu
->offset
.sect_off
;
19097 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
19098 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
19103 /* Return the address size given in the compilation unit header for CU. */
19106 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
19108 struct comp_unit_head cu_header_local
;
19109 const struct comp_unit_head
*cu_headerp
;
19111 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19113 return cu_headerp
->addr_size
;
19116 /* Return the offset size given in the compilation unit header for CU. */
19119 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
19121 struct comp_unit_head cu_header_local
;
19122 const struct comp_unit_head
*cu_headerp
;
19124 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19126 return cu_headerp
->offset_size
;
19129 /* See its dwarf2loc.h declaration. */
19132 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
19134 struct comp_unit_head cu_header_local
;
19135 const struct comp_unit_head
*cu_headerp
;
19137 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19139 if (cu_headerp
->version
== 2)
19140 return cu_headerp
->addr_size
;
19142 return cu_headerp
->offset_size
;
19145 /* Return the text offset of the CU. The returned offset comes from
19146 this CU's objfile. If this objfile came from a separate debuginfo
19147 file, then the offset may be different from the corresponding
19148 offset in the parent objfile. */
19151 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
19153 struct objfile
*objfile
= per_cu
->objfile
;
19155 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
19158 /* Locate the .debug_info compilation unit from CU's objfile which contains
19159 the DIE at OFFSET. Raises an error on failure. */
19161 static struct dwarf2_per_cu_data
*
19162 dwarf2_find_containing_comp_unit (sect_offset offset
,
19163 unsigned int offset_in_dwz
,
19164 struct objfile
*objfile
)
19166 struct dwarf2_per_cu_data
*this_cu
;
19168 const sect_offset
*cu_off
;
19171 high
= dwarf2_per_objfile
->n_comp_units
- 1;
19174 struct dwarf2_per_cu_data
*mid_cu
;
19175 int mid
= low
+ (high
- low
) / 2;
19177 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
19178 cu_off
= &mid_cu
->offset
;
19179 if (mid_cu
->is_dwz
> offset_in_dwz
19180 || (mid_cu
->is_dwz
== offset_in_dwz
19181 && cu_off
->sect_off
>= offset
.sect_off
))
19186 gdb_assert (low
== high
);
19187 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
19188 cu_off
= &this_cu
->offset
;
19189 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
19191 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
19192 error (_("Dwarf Error: could not find partial DIE containing "
19193 "offset 0x%lx [in module %s]"),
19194 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
19196 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
19197 <= offset
.sect_off
);
19198 return dwarf2_per_objfile
->all_comp_units
[low
-1];
19202 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
19203 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
19204 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
19205 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
19206 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
19211 /* Initialize dwarf2_cu CU, owned by PER_CU. */
19214 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
19216 memset (cu
, 0, sizeof (*cu
));
19218 cu
->per_cu
= per_cu
;
19219 cu
->objfile
= per_cu
->objfile
;
19220 obstack_init (&cu
->comp_unit_obstack
);
19223 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
19226 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
19227 enum language pretend_language
)
19229 struct attribute
*attr
;
19231 /* Set the language we're debugging. */
19232 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
19234 set_cu_language (DW_UNSND (attr
), cu
);
19237 cu
->language
= pretend_language
;
19238 cu
->language_defn
= language_def (cu
->language
);
19241 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
19243 cu
->producer
= DW_STRING (attr
);
19246 /* Release one cached compilation unit, CU. We unlink it from the tree
19247 of compilation units, but we don't remove it from the read_in_chain;
19248 the caller is responsible for that.
19249 NOTE: DATA is a void * because this function is also used as a
19250 cleanup routine. */
19253 free_heap_comp_unit (void *data
)
19255 struct dwarf2_cu
*cu
= data
;
19257 gdb_assert (cu
->per_cu
!= NULL
);
19258 cu
->per_cu
->cu
= NULL
;
19261 obstack_free (&cu
->comp_unit_obstack
, NULL
);
19266 /* This cleanup function is passed the address of a dwarf2_cu on the stack
19267 when we're finished with it. We can't free the pointer itself, but be
19268 sure to unlink it from the cache. Also release any associated storage. */
19271 free_stack_comp_unit (void *data
)
19273 struct dwarf2_cu
*cu
= data
;
19275 gdb_assert (cu
->per_cu
!= NULL
);
19276 cu
->per_cu
->cu
= NULL
;
19279 obstack_free (&cu
->comp_unit_obstack
, NULL
);
19280 cu
->partial_dies
= NULL
;
19283 /* Free all cached compilation units. */
19286 free_cached_comp_units (void *data
)
19288 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19290 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19291 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19292 while (per_cu
!= NULL
)
19294 struct dwarf2_per_cu_data
*next_cu
;
19296 next_cu
= per_cu
->cu
->read_in_chain
;
19298 free_heap_comp_unit (per_cu
->cu
);
19299 *last_chain
= next_cu
;
19305 /* Increase the age counter on each cached compilation unit, and free
19306 any that are too old. */
19309 age_cached_comp_units (void)
19311 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19313 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
19314 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19315 while (per_cu
!= NULL
)
19317 per_cu
->cu
->last_used
++;
19318 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
19319 dwarf2_mark (per_cu
->cu
);
19320 per_cu
= per_cu
->cu
->read_in_chain
;
19323 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19324 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19325 while (per_cu
!= NULL
)
19327 struct dwarf2_per_cu_data
*next_cu
;
19329 next_cu
= per_cu
->cu
->read_in_chain
;
19331 if (!per_cu
->cu
->mark
)
19333 free_heap_comp_unit (per_cu
->cu
);
19334 *last_chain
= next_cu
;
19337 last_chain
= &per_cu
->cu
->read_in_chain
;
19343 /* Remove a single compilation unit from the cache. */
19346 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
19348 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19350 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19351 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19352 while (per_cu
!= NULL
)
19354 struct dwarf2_per_cu_data
*next_cu
;
19356 next_cu
= per_cu
->cu
->read_in_chain
;
19358 if (per_cu
== target_per_cu
)
19360 free_heap_comp_unit (per_cu
->cu
);
19362 *last_chain
= next_cu
;
19366 last_chain
= &per_cu
->cu
->read_in_chain
;
19372 /* Release all extra memory associated with OBJFILE. */
19375 dwarf2_free_objfile (struct objfile
*objfile
)
19377 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
19379 if (dwarf2_per_objfile
== NULL
)
19382 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
19383 free_cached_comp_units (NULL
);
19385 if (dwarf2_per_objfile
->quick_file_names_table
)
19386 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
19388 /* Everything else should be on the objfile obstack. */
19391 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
19392 We store these in a hash table separate from the DIEs, and preserve them
19393 when the DIEs are flushed out of cache.
19395 The CU "per_cu" pointer is needed because offset alone is not enough to
19396 uniquely identify the type. A file may have multiple .debug_types sections,
19397 or the type may come from a DWO file. We have to use something in
19398 dwarf2_per_cu_data (or the pointer to it) because we can enter the lookup
19399 routine, get_die_type_at_offset, from outside this file, and thus won't
19400 necessarily have PER_CU->cu. Fortunately, PER_CU is stable for the life
19403 struct dwarf2_per_cu_offset_and_type
19405 const struct dwarf2_per_cu_data
*per_cu
;
19406 sect_offset offset
;
19410 /* Hash function for a dwarf2_per_cu_offset_and_type. */
19413 per_cu_offset_and_type_hash (const void *item
)
19415 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
19417 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
19420 /* Equality function for a dwarf2_per_cu_offset_and_type. */
19423 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
19425 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
19426 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
19428 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
19429 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
19432 /* Set the type associated with DIE to TYPE. Save it in CU's hash
19433 table if necessary. For convenience, return TYPE.
19435 The DIEs reading must have careful ordering to:
19436 * Not cause infite loops trying to read in DIEs as a prerequisite for
19437 reading current DIE.
19438 * Not trying to dereference contents of still incompletely read in types
19439 while reading in other DIEs.
19440 * Enable referencing still incompletely read in types just by a pointer to
19441 the type without accessing its fields.
19443 Therefore caller should follow these rules:
19444 * Try to fetch any prerequisite types we may need to build this DIE type
19445 before building the type and calling set_die_type.
19446 * After building type call set_die_type for current DIE as soon as
19447 possible before fetching more types to complete the current type.
19448 * Make the type as complete as possible before fetching more types. */
19450 static struct type
*
19451 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
19453 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
19454 struct objfile
*objfile
= cu
->objfile
;
19456 /* For Ada types, make sure that the gnat-specific data is always
19457 initialized (if not already set). There are a few types where
19458 we should not be doing so, because the type-specific area is
19459 already used to hold some other piece of info (eg: TYPE_CODE_FLT
19460 where the type-specific area is used to store the floatformat).
19461 But this is not a problem, because the gnat-specific information
19462 is actually not needed for these types. */
19463 if (need_gnat_info (cu
)
19464 && TYPE_CODE (type
) != TYPE_CODE_FUNC
19465 && TYPE_CODE (type
) != TYPE_CODE_FLT
19466 && !HAVE_GNAT_AUX_INFO (type
))
19467 INIT_GNAT_SPECIFIC (type
);
19469 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
19471 dwarf2_per_objfile
->die_type_hash
=
19472 htab_create_alloc_ex (127,
19473 per_cu_offset_and_type_hash
,
19474 per_cu_offset_and_type_eq
,
19476 &objfile
->objfile_obstack
,
19477 hashtab_obstack_allocate
,
19478 dummy_obstack_deallocate
);
19481 ofs
.per_cu
= cu
->per_cu
;
19482 ofs
.offset
= die
->offset
;
19484 slot
= (struct dwarf2_per_cu_offset_and_type
**)
19485 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
19487 complaint (&symfile_complaints
,
19488 _("A problem internal to GDB: DIE 0x%x has type already set"),
19489 die
->offset
.sect_off
);
19490 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
19495 /* Look up the type for the die at OFFSET in the appropriate type_hash
19496 table, or return NULL if the die does not have a saved type. */
19498 static struct type
*
19499 get_die_type_at_offset (sect_offset offset
,
19500 struct dwarf2_per_cu_data
*per_cu
)
19502 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
19504 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
19507 ofs
.per_cu
= per_cu
;
19508 ofs
.offset
= offset
;
19509 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
19516 /* Look up the type for DIE in the appropriate type_hash table,
19517 or return NULL if DIE does not have a saved type. */
19519 static struct type
*
19520 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19522 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
19525 /* Add a dependence relationship from CU to REF_PER_CU. */
19528 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
19529 struct dwarf2_per_cu_data
*ref_per_cu
)
19533 if (cu
->dependencies
== NULL
)
19535 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
19536 NULL
, &cu
->comp_unit_obstack
,
19537 hashtab_obstack_allocate
,
19538 dummy_obstack_deallocate
);
19540 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
19542 *slot
= ref_per_cu
;
19545 /* Subroutine of dwarf2_mark to pass to htab_traverse.
19546 Set the mark field in every compilation unit in the
19547 cache that we must keep because we are keeping CU. */
19550 dwarf2_mark_helper (void **slot
, void *data
)
19552 struct dwarf2_per_cu_data
*per_cu
;
19554 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
19556 /* cu->dependencies references may not yet have been ever read if QUIT aborts
19557 reading of the chain. As such dependencies remain valid it is not much
19558 useful to track and undo them during QUIT cleanups. */
19559 if (per_cu
->cu
== NULL
)
19562 if (per_cu
->cu
->mark
)
19564 per_cu
->cu
->mark
= 1;
19566 if (per_cu
->cu
->dependencies
!= NULL
)
19567 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
19572 /* Set the mark field in CU and in every other compilation unit in the
19573 cache that we must keep because we are keeping CU. */
19576 dwarf2_mark (struct dwarf2_cu
*cu
)
19581 if (cu
->dependencies
!= NULL
)
19582 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
19586 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
19590 per_cu
->cu
->mark
= 0;
19591 per_cu
= per_cu
->cu
->read_in_chain
;
19595 /* Trivial hash function for partial_die_info: the hash value of a DIE
19596 is its offset in .debug_info for this objfile. */
19599 partial_die_hash (const void *item
)
19601 const struct partial_die_info
*part_die
= item
;
19603 return part_die
->offset
.sect_off
;
19606 /* Trivial comparison function for partial_die_info structures: two DIEs
19607 are equal if they have the same offset. */
19610 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
19612 const struct partial_die_info
*part_die_lhs
= item_lhs
;
19613 const struct partial_die_info
*part_die_rhs
= item_rhs
;
19615 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
19618 static struct cmd_list_element
*set_dwarf2_cmdlist
;
19619 static struct cmd_list_element
*show_dwarf2_cmdlist
;
19622 set_dwarf2_cmd (char *args
, int from_tty
)
19624 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
19628 show_dwarf2_cmd (char *args
, int from_tty
)
19630 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
19633 /* Free data associated with OBJFILE, if necessary. */
19636 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
19638 struct dwarf2_per_objfile
*data
= d
;
19641 for (ix
= 0; ix
< dwarf2_per_objfile
->n_comp_units
; ++ix
)
19642 VEC_free (dwarf2_per_cu_ptr
,
19643 dwarf2_per_objfile
->all_comp_units
[ix
]->s
.imported_symtabs
);
19645 VEC_free (dwarf2_section_info_def
, data
->types
);
19647 if (data
->dwo_files
)
19648 free_dwo_files (data
->dwo_files
, objfile
);
19650 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
19651 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
19655 /* The "save gdb-index" command. */
19657 /* The contents of the hash table we create when building the string
19659 struct strtab_entry
19661 offset_type offset
;
19665 /* Hash function for a strtab_entry.
19667 Function is used only during write_hash_table so no index format backward
19668 compatibility is needed. */
19671 hash_strtab_entry (const void *e
)
19673 const struct strtab_entry
*entry
= e
;
19674 return mapped_index_string_hash (INT_MAX
, entry
->str
);
19677 /* Equality function for a strtab_entry. */
19680 eq_strtab_entry (const void *a
, const void *b
)
19682 const struct strtab_entry
*ea
= a
;
19683 const struct strtab_entry
*eb
= b
;
19684 return !strcmp (ea
->str
, eb
->str
);
19687 /* Create a strtab_entry hash table. */
19690 create_strtab (void)
19692 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
19693 xfree
, xcalloc
, xfree
);
19696 /* Add a string to the constant pool. Return the string's offset in
19700 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
19703 struct strtab_entry entry
;
19704 struct strtab_entry
*result
;
19707 slot
= htab_find_slot (table
, &entry
, INSERT
);
19712 result
= XNEW (struct strtab_entry
);
19713 result
->offset
= obstack_object_size (cpool
);
19715 obstack_grow_str0 (cpool
, str
);
19718 return result
->offset
;
19721 /* An entry in the symbol table. */
19722 struct symtab_index_entry
19724 /* The name of the symbol. */
19726 /* The offset of the name in the constant pool. */
19727 offset_type index_offset
;
19728 /* A sorted vector of the indices of all the CUs that hold an object
19730 VEC (offset_type
) *cu_indices
;
19733 /* The symbol table. This is a power-of-2-sized hash table. */
19734 struct mapped_symtab
19736 offset_type n_elements
;
19738 struct symtab_index_entry
**data
;
19741 /* Hash function for a symtab_index_entry. */
19744 hash_symtab_entry (const void *e
)
19746 const struct symtab_index_entry
*entry
= e
;
19747 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
19748 sizeof (offset_type
) * VEC_length (offset_type
,
19749 entry
->cu_indices
),
19753 /* Equality function for a symtab_index_entry. */
19756 eq_symtab_entry (const void *a
, const void *b
)
19758 const struct symtab_index_entry
*ea
= a
;
19759 const struct symtab_index_entry
*eb
= b
;
19760 int len
= VEC_length (offset_type
, ea
->cu_indices
);
19761 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
19763 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
19764 VEC_address (offset_type
, eb
->cu_indices
),
19765 sizeof (offset_type
) * len
);
19768 /* Destroy a symtab_index_entry. */
19771 delete_symtab_entry (void *p
)
19773 struct symtab_index_entry
*entry
= p
;
19774 VEC_free (offset_type
, entry
->cu_indices
);
19778 /* Create a hash table holding symtab_index_entry objects. */
19781 create_symbol_hash_table (void)
19783 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
19784 delete_symtab_entry
, xcalloc
, xfree
);
19787 /* Create a new mapped symtab object. */
19789 static struct mapped_symtab
*
19790 create_mapped_symtab (void)
19792 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
19793 symtab
->n_elements
= 0;
19794 symtab
->size
= 1024;
19795 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
19799 /* Destroy a mapped_symtab. */
19802 cleanup_mapped_symtab (void *p
)
19804 struct mapped_symtab
*symtab
= p
;
19805 /* The contents of the array are freed when the other hash table is
19807 xfree (symtab
->data
);
19811 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
19814 Function is used only during write_hash_table so no index format backward
19815 compatibility is needed. */
19817 static struct symtab_index_entry
**
19818 find_slot (struct mapped_symtab
*symtab
, const char *name
)
19820 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
19822 index
= hash
& (symtab
->size
- 1);
19823 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
19827 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
19828 return &symtab
->data
[index
];
19829 index
= (index
+ step
) & (symtab
->size
- 1);
19833 /* Expand SYMTAB's hash table. */
19836 hash_expand (struct mapped_symtab
*symtab
)
19838 offset_type old_size
= symtab
->size
;
19840 struct symtab_index_entry
**old_entries
= symtab
->data
;
19843 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
19845 for (i
= 0; i
< old_size
; ++i
)
19847 if (old_entries
[i
])
19849 struct symtab_index_entry
**slot
= find_slot (symtab
,
19850 old_entries
[i
]->name
);
19851 *slot
= old_entries
[i
];
19855 xfree (old_entries
);
19858 /* Add an entry to SYMTAB. NAME is the name of the symbol.
19859 CU_INDEX is the index of the CU in which the symbol appears.
19860 IS_STATIC is one if the symbol is static, otherwise zero (global). */
19863 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
19864 int is_static
, gdb_index_symbol_kind kind
,
19865 offset_type cu_index
)
19867 struct symtab_index_entry
**slot
;
19868 offset_type cu_index_and_attrs
;
19870 ++symtab
->n_elements
;
19871 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
19872 hash_expand (symtab
);
19874 slot
= find_slot (symtab
, name
);
19877 *slot
= XNEW (struct symtab_index_entry
);
19878 (*slot
)->name
= name
;
19879 /* index_offset is set later. */
19880 (*slot
)->cu_indices
= NULL
;
19883 cu_index_and_attrs
= 0;
19884 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
19885 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
19886 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
19888 /* We don't want to record an index value twice as we want to avoid the
19890 We process all global symbols and then all static symbols
19891 (which would allow us to avoid the duplication by only having to check
19892 the last entry pushed), but a symbol could have multiple kinds in one CU.
19893 To keep things simple we don't worry about the duplication here and
19894 sort and uniqufy the list after we've processed all symbols. */
19895 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
19898 /* qsort helper routine for uniquify_cu_indices. */
19901 offset_type_compare (const void *ap
, const void *bp
)
19903 offset_type a
= *(offset_type
*) ap
;
19904 offset_type b
= *(offset_type
*) bp
;
19906 return (a
> b
) - (b
> a
);
19909 /* Sort and remove duplicates of all symbols' cu_indices lists. */
19912 uniquify_cu_indices (struct mapped_symtab
*symtab
)
19916 for (i
= 0; i
< symtab
->size
; ++i
)
19918 struct symtab_index_entry
*entry
= symtab
->data
[i
];
19921 && entry
->cu_indices
!= NULL
)
19923 unsigned int next_to_insert
, next_to_check
;
19924 offset_type last_value
;
19926 qsort (VEC_address (offset_type
, entry
->cu_indices
),
19927 VEC_length (offset_type
, entry
->cu_indices
),
19928 sizeof (offset_type
), offset_type_compare
);
19930 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
19931 next_to_insert
= 1;
19932 for (next_to_check
= 1;
19933 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
19936 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
19939 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
19941 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
19946 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
19951 /* Add a vector of indices to the constant pool. */
19954 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
19955 struct symtab_index_entry
*entry
)
19959 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
19962 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
19963 offset_type val
= MAYBE_SWAP (len
);
19968 entry
->index_offset
= obstack_object_size (cpool
);
19970 obstack_grow (cpool
, &val
, sizeof (val
));
19972 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
19975 val
= MAYBE_SWAP (iter
);
19976 obstack_grow (cpool
, &val
, sizeof (val
));
19981 struct symtab_index_entry
*old_entry
= *slot
;
19982 entry
->index_offset
= old_entry
->index_offset
;
19985 return entry
->index_offset
;
19988 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
19989 constant pool entries going into the obstack CPOOL. */
19992 write_hash_table (struct mapped_symtab
*symtab
,
19993 struct obstack
*output
, struct obstack
*cpool
)
19996 htab_t symbol_hash_table
;
19999 symbol_hash_table
= create_symbol_hash_table ();
20000 str_table
= create_strtab ();
20002 /* We add all the index vectors to the constant pool first, to
20003 ensure alignment is ok. */
20004 for (i
= 0; i
< symtab
->size
; ++i
)
20006 if (symtab
->data
[i
])
20007 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
20010 /* Now write out the hash table. */
20011 for (i
= 0; i
< symtab
->size
; ++i
)
20013 offset_type str_off
, vec_off
;
20015 if (symtab
->data
[i
])
20017 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
20018 vec_off
= symtab
->data
[i
]->index_offset
;
20022 /* While 0 is a valid constant pool index, it is not valid
20023 to have 0 for both offsets. */
20028 str_off
= MAYBE_SWAP (str_off
);
20029 vec_off
= MAYBE_SWAP (vec_off
);
20031 obstack_grow (output
, &str_off
, sizeof (str_off
));
20032 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
20035 htab_delete (str_table
);
20036 htab_delete (symbol_hash_table
);
20039 /* Struct to map psymtab to CU index in the index file. */
20040 struct psymtab_cu_index_map
20042 struct partial_symtab
*psymtab
;
20043 unsigned int cu_index
;
20047 hash_psymtab_cu_index (const void *item
)
20049 const struct psymtab_cu_index_map
*map
= item
;
20051 return htab_hash_pointer (map
->psymtab
);
20055 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
20057 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
20058 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
20060 return lhs
->psymtab
== rhs
->psymtab
;
20063 /* Helper struct for building the address table. */
20064 struct addrmap_index_data
20066 struct objfile
*objfile
;
20067 struct obstack
*addr_obstack
;
20068 htab_t cu_index_htab
;
20070 /* Non-zero if the previous_* fields are valid.
20071 We can't write an entry until we see the next entry (since it is only then
20072 that we know the end of the entry). */
20073 int previous_valid
;
20074 /* Index of the CU in the table of all CUs in the index file. */
20075 unsigned int previous_cu_index
;
20076 /* Start address of the CU. */
20077 CORE_ADDR previous_cu_start
;
20080 /* Write an address entry to OBSTACK. */
20083 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
20084 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
20086 offset_type cu_index_to_write
;
20088 CORE_ADDR baseaddr
;
20090 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
20092 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
20093 obstack_grow (obstack
, addr
, 8);
20094 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
20095 obstack_grow (obstack
, addr
, 8);
20096 cu_index_to_write
= MAYBE_SWAP (cu_index
);
20097 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
20100 /* Worker function for traversing an addrmap to build the address table. */
20103 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
20105 struct addrmap_index_data
*data
= datap
;
20106 struct partial_symtab
*pst
= obj
;
20108 if (data
->previous_valid
)
20109 add_address_entry (data
->objfile
, data
->addr_obstack
,
20110 data
->previous_cu_start
, start_addr
,
20111 data
->previous_cu_index
);
20113 data
->previous_cu_start
= start_addr
;
20116 struct psymtab_cu_index_map find_map
, *map
;
20117 find_map
.psymtab
= pst
;
20118 map
= htab_find (data
->cu_index_htab
, &find_map
);
20119 gdb_assert (map
!= NULL
);
20120 data
->previous_cu_index
= map
->cu_index
;
20121 data
->previous_valid
= 1;
20124 data
->previous_valid
= 0;
20129 /* Write OBJFILE's address map to OBSTACK.
20130 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
20131 in the index file. */
20134 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
20135 htab_t cu_index_htab
)
20137 struct addrmap_index_data addrmap_index_data
;
20139 /* When writing the address table, we have to cope with the fact that
20140 the addrmap iterator only provides the start of a region; we have to
20141 wait until the next invocation to get the start of the next region. */
20143 addrmap_index_data
.objfile
= objfile
;
20144 addrmap_index_data
.addr_obstack
= obstack
;
20145 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
20146 addrmap_index_data
.previous_valid
= 0;
20148 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
20149 &addrmap_index_data
);
20151 /* It's highly unlikely the last entry (end address = 0xff...ff)
20152 is valid, but we should still handle it.
20153 The end address is recorded as the start of the next region, but that
20154 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
20156 if (addrmap_index_data
.previous_valid
)
20157 add_address_entry (objfile
, obstack
,
20158 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
20159 addrmap_index_data
.previous_cu_index
);
20162 /* Return the symbol kind of PSYM. */
20164 static gdb_index_symbol_kind
20165 symbol_kind (struct partial_symbol
*psym
)
20167 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
20168 enum address_class aclass
= PSYMBOL_CLASS (psym
);
20176 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
20178 return GDB_INDEX_SYMBOL_KIND_TYPE
;
20180 case LOC_CONST_BYTES
:
20181 case LOC_OPTIMIZED_OUT
:
20183 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
20185 /* Note: It's currently impossible to recognize psyms as enum values
20186 short of reading the type info. For now punt. */
20187 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
20189 /* There are other LOC_FOO values that one might want to classify
20190 as variables, but dwarf2read.c doesn't currently use them. */
20191 return GDB_INDEX_SYMBOL_KIND_OTHER
;
20193 case STRUCT_DOMAIN
:
20194 return GDB_INDEX_SYMBOL_KIND_TYPE
;
20196 return GDB_INDEX_SYMBOL_KIND_OTHER
;
20200 /* Add a list of partial symbols to SYMTAB. */
20203 write_psymbols (struct mapped_symtab
*symtab
,
20205 struct partial_symbol
**psymp
,
20207 offset_type cu_index
,
20210 for (; count
-- > 0; ++psymp
)
20212 struct partial_symbol
*psym
= *psymp
;
20215 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
20216 error (_("Ada is not currently supported by the index"));
20218 /* Only add a given psymbol once. */
20219 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
20222 gdb_index_symbol_kind kind
= symbol_kind (psym
);
20225 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
20226 is_static
, kind
, cu_index
);
20231 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
20232 exception if there is an error. */
20235 write_obstack (FILE *file
, struct obstack
*obstack
)
20237 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
20239 != obstack_object_size (obstack
))
20240 error (_("couldn't data write to file"));
20243 /* Unlink a file if the argument is not NULL. */
20246 unlink_if_set (void *p
)
20248 char **filename
= p
;
20250 unlink (*filename
);
20253 /* A helper struct used when iterating over debug_types. */
20254 struct signatured_type_index_data
20256 struct objfile
*objfile
;
20257 struct mapped_symtab
*symtab
;
20258 struct obstack
*types_list
;
20263 /* A helper function that writes a single signatured_type to an
20267 write_one_signatured_type (void **slot
, void *d
)
20269 struct signatured_type_index_data
*info
= d
;
20270 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
20271 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
20272 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
20275 write_psymbols (info
->symtab
,
20277 info
->objfile
->global_psymbols
.list
20278 + psymtab
->globals_offset
,
20279 psymtab
->n_global_syms
, info
->cu_index
,
20281 write_psymbols (info
->symtab
,
20283 info
->objfile
->static_psymbols
.list
20284 + psymtab
->statics_offset
,
20285 psymtab
->n_static_syms
, info
->cu_index
,
20288 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20289 entry
->per_cu
.offset
.sect_off
);
20290 obstack_grow (info
->types_list
, val
, 8);
20291 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20292 entry
->type_offset_in_tu
.cu_off
);
20293 obstack_grow (info
->types_list
, val
, 8);
20294 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
20295 obstack_grow (info
->types_list
, val
, 8);
20302 /* Recurse into all "included" dependencies and write their symbols as
20303 if they appeared in this psymtab. */
20306 recursively_write_psymbols (struct objfile
*objfile
,
20307 struct partial_symtab
*psymtab
,
20308 struct mapped_symtab
*symtab
,
20310 offset_type cu_index
)
20314 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
20315 if (psymtab
->dependencies
[i
]->user
!= NULL
)
20316 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
20317 symtab
, psyms_seen
, cu_index
);
20319 write_psymbols (symtab
,
20321 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
20322 psymtab
->n_global_syms
, cu_index
,
20324 write_psymbols (symtab
,
20326 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
20327 psymtab
->n_static_syms
, cu_index
,
20331 /* Create an index file for OBJFILE in the directory DIR. */
20334 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
20336 struct cleanup
*cleanup
;
20337 char *filename
, *cleanup_filename
;
20338 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
20339 struct obstack cu_list
, types_cu_list
;
20342 struct mapped_symtab
*symtab
;
20343 offset_type val
, size_of_contents
, total_len
;
20346 htab_t cu_index_htab
;
20347 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
20349 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
20352 if (dwarf2_per_objfile
->using_index
)
20353 error (_("Cannot use an index to create the index"));
20355 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
20356 error (_("Cannot make an index when the file has multiple .debug_types sections"));
20358 if (stat (objfile
->name
, &st
) < 0)
20359 perror_with_name (objfile
->name
);
20361 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
20362 INDEX_SUFFIX
, (char *) NULL
);
20363 cleanup
= make_cleanup (xfree
, filename
);
20365 out_file
= fopen (filename
, "wb");
20367 error (_("Can't open `%s' for writing"), filename
);
20369 cleanup_filename
= filename
;
20370 make_cleanup (unlink_if_set
, &cleanup_filename
);
20372 symtab
= create_mapped_symtab ();
20373 make_cleanup (cleanup_mapped_symtab
, symtab
);
20375 obstack_init (&addr_obstack
);
20376 make_cleanup_obstack_free (&addr_obstack
);
20378 obstack_init (&cu_list
);
20379 make_cleanup_obstack_free (&cu_list
);
20381 obstack_init (&types_cu_list
);
20382 make_cleanup_obstack_free (&types_cu_list
);
20384 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
20385 NULL
, xcalloc
, xfree
);
20386 make_cleanup_htab_delete (psyms_seen
);
20388 /* While we're scanning CU's create a table that maps a psymtab pointer
20389 (which is what addrmap records) to its index (which is what is recorded
20390 in the index file). This will later be needed to write the address
20392 cu_index_htab
= htab_create_alloc (100,
20393 hash_psymtab_cu_index
,
20394 eq_psymtab_cu_index
,
20395 NULL
, xcalloc
, xfree
);
20396 make_cleanup_htab_delete (cu_index_htab
);
20397 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
20398 xmalloc (sizeof (struct psymtab_cu_index_map
)
20399 * dwarf2_per_objfile
->n_comp_units
);
20400 make_cleanup (xfree
, psymtab_cu_index_map
);
20402 /* The CU list is already sorted, so we don't need to do additional
20403 work here. Also, the debug_types entries do not appear in
20404 all_comp_units, but only in their own hash table. */
20405 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
20407 struct dwarf2_per_cu_data
*per_cu
20408 = dwarf2_per_objfile
->all_comp_units
[i
];
20409 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
20411 struct psymtab_cu_index_map
*map
;
20414 if (psymtab
->user
== NULL
)
20415 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
20417 map
= &psymtab_cu_index_map
[i
];
20418 map
->psymtab
= psymtab
;
20420 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
20421 gdb_assert (slot
!= NULL
);
20422 gdb_assert (*slot
== NULL
);
20425 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20426 per_cu
->offset
.sect_off
);
20427 obstack_grow (&cu_list
, val
, 8);
20428 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
20429 obstack_grow (&cu_list
, val
, 8);
20432 /* Dump the address map. */
20433 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
20435 /* Write out the .debug_type entries, if any. */
20436 if (dwarf2_per_objfile
->signatured_types
)
20438 struct signatured_type_index_data sig_data
;
20440 sig_data
.objfile
= objfile
;
20441 sig_data
.symtab
= symtab
;
20442 sig_data
.types_list
= &types_cu_list
;
20443 sig_data
.psyms_seen
= psyms_seen
;
20444 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
20445 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
20446 write_one_signatured_type
, &sig_data
);
20449 /* Now that we've processed all symbols we can shrink their cu_indices
20451 uniquify_cu_indices (symtab
);
20453 obstack_init (&constant_pool
);
20454 make_cleanup_obstack_free (&constant_pool
);
20455 obstack_init (&symtab_obstack
);
20456 make_cleanup_obstack_free (&symtab_obstack
);
20457 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
20459 obstack_init (&contents
);
20460 make_cleanup_obstack_free (&contents
);
20461 size_of_contents
= 6 * sizeof (offset_type
);
20462 total_len
= size_of_contents
;
20464 /* The version number. */
20465 val
= MAYBE_SWAP (7);
20466 obstack_grow (&contents
, &val
, sizeof (val
));
20468 /* The offset of the CU list from the start of the file. */
20469 val
= MAYBE_SWAP (total_len
);
20470 obstack_grow (&contents
, &val
, sizeof (val
));
20471 total_len
+= obstack_object_size (&cu_list
);
20473 /* The offset of the types CU list from the start of the file. */
20474 val
= MAYBE_SWAP (total_len
);
20475 obstack_grow (&contents
, &val
, sizeof (val
));
20476 total_len
+= obstack_object_size (&types_cu_list
);
20478 /* The offset of the address table from the start of the file. */
20479 val
= MAYBE_SWAP (total_len
);
20480 obstack_grow (&contents
, &val
, sizeof (val
));
20481 total_len
+= obstack_object_size (&addr_obstack
);
20483 /* The offset of the symbol table from the start of the file. */
20484 val
= MAYBE_SWAP (total_len
);
20485 obstack_grow (&contents
, &val
, sizeof (val
));
20486 total_len
+= obstack_object_size (&symtab_obstack
);
20488 /* The offset of the constant pool from the start of the file. */
20489 val
= MAYBE_SWAP (total_len
);
20490 obstack_grow (&contents
, &val
, sizeof (val
));
20491 total_len
+= obstack_object_size (&constant_pool
);
20493 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
20495 write_obstack (out_file
, &contents
);
20496 write_obstack (out_file
, &cu_list
);
20497 write_obstack (out_file
, &types_cu_list
);
20498 write_obstack (out_file
, &addr_obstack
);
20499 write_obstack (out_file
, &symtab_obstack
);
20500 write_obstack (out_file
, &constant_pool
);
20504 /* We want to keep the file, so we set cleanup_filename to NULL
20505 here. See unlink_if_set. */
20506 cleanup_filename
= NULL
;
20508 do_cleanups (cleanup
);
20511 /* Implementation of the `save gdb-index' command.
20513 Note that the file format used by this command is documented in the
20514 GDB manual. Any changes here must be documented there. */
20517 save_gdb_index_command (char *arg
, int from_tty
)
20519 struct objfile
*objfile
;
20522 error (_("usage: save gdb-index DIRECTORY"));
20524 ALL_OBJFILES (objfile
)
20528 /* If the objfile does not correspond to an actual file, skip it. */
20529 if (stat (objfile
->name
, &st
) < 0)
20532 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
20533 if (dwarf2_per_objfile
)
20535 volatile struct gdb_exception except
;
20537 TRY_CATCH (except
, RETURN_MASK_ERROR
)
20539 write_psymtabs_to_index (objfile
, arg
);
20541 if (except
.reason
< 0)
20542 exception_fprintf (gdb_stderr
, except
,
20543 _("Error while writing index for `%s': "),
20551 int dwarf2_always_disassemble
;
20554 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
20555 struct cmd_list_element
*c
, const char *value
)
20557 fprintf_filtered (file
,
20558 _("Whether to always disassemble "
20559 "DWARF expressions is %s.\n"),
20564 show_check_physname (struct ui_file
*file
, int from_tty
,
20565 struct cmd_list_element
*c
, const char *value
)
20567 fprintf_filtered (file
,
20568 _("Whether to check \"physname\" is %s.\n"),
20572 void _initialize_dwarf2_read (void);
20575 _initialize_dwarf2_read (void)
20577 struct cmd_list_element
*c
;
20579 dwarf2_objfile_data_key
20580 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
20582 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
20583 Set DWARF 2 specific variables.\n\
20584 Configure DWARF 2 variables such as the cache size"),
20585 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
20586 0/*allow-unknown*/, &maintenance_set_cmdlist
);
20588 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
20589 Show DWARF 2 specific variables\n\
20590 Show DWARF 2 variables such as the cache size"),
20591 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
20592 0/*allow-unknown*/, &maintenance_show_cmdlist
);
20594 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
20595 &dwarf2_max_cache_age
, _("\
20596 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
20597 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
20598 A higher limit means that cached compilation units will be stored\n\
20599 in memory longer, and more total memory will be used. Zero disables\n\
20600 caching, which can slow down startup."),
20602 show_dwarf2_max_cache_age
,
20603 &set_dwarf2_cmdlist
,
20604 &show_dwarf2_cmdlist
);
20606 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
20607 &dwarf2_always_disassemble
, _("\
20608 Set whether `info address' always disassembles DWARF expressions."), _("\
20609 Show whether `info address' always disassembles DWARF expressions."), _("\
20610 When enabled, DWARF expressions are always printed in an assembly-like\n\
20611 syntax. When disabled, expressions will be printed in a more\n\
20612 conversational style, when possible."),
20614 show_dwarf2_always_disassemble
,
20615 &set_dwarf2_cmdlist
,
20616 &show_dwarf2_cmdlist
);
20618 add_setshow_boolean_cmd ("dwarf2-read", no_class
, &dwarf2_read_debug
, _("\
20619 Set debugging of the dwarf2 reader."), _("\
20620 Show debugging of the dwarf2 reader."), _("\
20621 When enabled, debugging messages are printed during dwarf2 reading\n\
20622 and symtab expansion."),
20625 &setdebuglist
, &showdebuglist
);
20627 add_setshow_zuinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
20628 Set debugging of the dwarf2 DIE reader."), _("\
20629 Show debugging of the dwarf2 DIE reader."), _("\
20630 When enabled (non-zero), DIEs are dumped after they are read in.\n\
20631 The value is the maximum depth to print."),
20634 &setdebuglist
, &showdebuglist
);
20636 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
20637 Set cross-checking of \"physname\" code against demangler."), _("\
20638 Show cross-checking of \"physname\" code against demangler."), _("\
20639 When enabled, GDB's internal \"physname\" code is checked against\n\
20641 NULL
, show_check_physname
,
20642 &setdebuglist
, &showdebuglist
);
20644 add_setshow_boolean_cmd ("use-deprecated-index-sections",
20645 no_class
, &use_deprecated_index_sections
, _("\
20646 Set whether to use deprecated gdb_index sections."), _("\
20647 Show whether to use deprecated gdb_index sections."), _("\
20648 When enabled, deprecated .gdb_index sections are used anyway.\n\
20649 Normally they are ignored either because of a missing feature or\n\
20650 performance issue.\n\
20651 Warning: This option must be enabled before gdb reads the file."),
20654 &setlist
, &showlist
);
20656 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
20658 Save a gdb-index file.\n\
20659 Usage: save gdb-index DIRECTORY"),
20661 set_cmd_completer (c
, filename_completer
);