1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2015 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"
59 #include "completer.h"
64 #include "gdbcore.h" /* for gnutarget */
65 #include "gdb/gdb-index.h"
70 #include "filestuff.h"
74 #include <sys/types.h>
76 typedef struct symbol
*symbolp
;
79 /* When == 1, print basic high level tracing messages.
80 When > 1, be more verbose.
81 This is in contrast to the low level DIE reading of dwarf2_die_debug. */
82 static unsigned int dwarf2_read_debug
= 0;
84 /* When non-zero, dump DIEs after they are read in. */
85 static unsigned int dwarf2_die_debug
= 0;
87 /* When non-zero, cross-check physname against demangler. */
88 static int check_physname
= 0;
90 /* When non-zero, do not reject deprecated .gdb_index sections. */
91 static int use_deprecated_index_sections
= 0;
93 static const struct objfile_data
*dwarf2_objfile_data_key
;
95 /* The "aclass" indices for various kinds of computed DWARF symbols. */
97 static int dwarf2_locexpr_index
;
98 static int dwarf2_loclist_index
;
99 static int dwarf2_locexpr_block_index
;
100 static int dwarf2_loclist_block_index
;
102 /* A descriptor for dwarf sections.
104 S.ASECTION, SIZE are typically initialized when the objfile is first
105 scanned. BUFFER, READIN are filled in later when the section is read.
106 If the section contained compressed data then SIZE is updated to record
107 the uncompressed size of the section.
109 DWP file format V2 introduces a wrinkle that is easiest to handle by
110 creating the concept of virtual sections contained within a real section.
111 In DWP V2 the sections of the input DWO files are concatenated together
112 into one section, but section offsets are kept relative to the original
114 If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to
115 the real section this "virtual" section is contained in, and BUFFER,SIZE
116 describe the virtual section. */
118 struct dwarf2_section_info
122 /* If this is a real section, the bfd section. */
124 /* If this is a virtual section, pointer to the containing ("real")
126 struct dwarf2_section_info
*containing_section
;
128 /* Pointer to section data, only valid if readin. */
129 const gdb_byte
*buffer
;
130 /* The size of the section, real or virtual. */
132 /* If this is a virtual section, the offset in the real section.
133 Only valid if is_virtual. */
134 bfd_size_type virtual_offset
;
135 /* True if we have tried to read this section. */
137 /* True if this is a virtual section, False otherwise.
138 This specifies which of s.asection and s.containing_section to use. */
142 typedef struct dwarf2_section_info dwarf2_section_info_def
;
143 DEF_VEC_O (dwarf2_section_info_def
);
145 /* All offsets in the index are of this type. It must be
146 architecture-independent. */
147 typedef uint32_t offset_type
;
149 DEF_VEC_I (offset_type
);
151 /* Ensure only legit values are used. */
152 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
154 gdb_assert ((unsigned int) (value) <= 1); \
155 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
158 /* Ensure only legit values are used. */
159 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
161 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
162 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
163 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
166 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
167 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
169 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
170 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
173 /* A description of the mapped index. The file format is described in
174 a comment by the code that writes the index. */
177 /* Index data format version. */
180 /* The total length of the buffer. */
183 /* A pointer to the address table data. */
184 const gdb_byte
*address_table
;
186 /* Size of the address table data in bytes. */
187 offset_type address_table_size
;
189 /* The symbol table, implemented as a hash table. */
190 const offset_type
*symbol_table
;
192 /* Size in slots, each slot is 2 offset_types. */
193 offset_type symbol_table_slots
;
195 /* A pointer to the constant pool. */
196 const char *constant_pool
;
199 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
200 DEF_VEC_P (dwarf2_per_cu_ptr
);
204 int nr_uniq_abbrev_tables
;
206 int nr_symtab_sharers
;
207 int nr_stmt_less_type_units
;
208 int nr_all_type_units_reallocs
;
211 /* Collection of data recorded per objfile.
212 This hangs off of dwarf2_objfile_data_key. */
214 struct dwarf2_per_objfile
216 struct dwarf2_section_info info
;
217 struct dwarf2_section_info abbrev
;
218 struct dwarf2_section_info line
;
219 struct dwarf2_section_info loc
;
220 struct dwarf2_section_info macinfo
;
221 struct dwarf2_section_info macro
;
222 struct dwarf2_section_info str
;
223 struct dwarf2_section_info ranges
;
224 struct dwarf2_section_info addr
;
225 struct dwarf2_section_info frame
;
226 struct dwarf2_section_info eh_frame
;
227 struct dwarf2_section_info gdb_index
;
229 VEC (dwarf2_section_info_def
) *types
;
232 struct objfile
*objfile
;
234 /* Table of all the compilation units. This is used to locate
235 the target compilation unit of a particular reference. */
236 struct dwarf2_per_cu_data
**all_comp_units
;
238 /* The number of compilation units in ALL_COMP_UNITS. */
241 /* The number of .debug_types-related CUs. */
244 /* The number of elements allocated in all_type_units.
245 If there are skeleton-less TUs, we add them to all_type_units lazily. */
246 int n_allocated_type_units
;
248 /* The .debug_types-related CUs (TUs).
249 This is stored in malloc space because we may realloc it. */
250 struct signatured_type
**all_type_units
;
252 /* Table of struct type_unit_group objects.
253 The hash key is the DW_AT_stmt_list value. */
254 htab_t type_unit_groups
;
256 /* A table mapping .debug_types signatures to its signatured_type entry.
257 This is NULL if the .debug_types section hasn't been read in yet. */
258 htab_t signatured_types
;
260 /* Type unit statistics, to see how well the scaling improvements
262 struct tu_stats tu_stats
;
264 /* A chain of compilation units that are currently read in, so that
265 they can be freed later. */
266 struct dwarf2_per_cu_data
*read_in_chain
;
268 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
269 This is NULL if the table hasn't been allocated yet. */
272 /* Non-zero if we've check for whether there is a DWP file. */
275 /* The DWP file if there is one, or NULL. */
276 struct dwp_file
*dwp_file
;
278 /* The shared '.dwz' file, if one exists. This is used when the
279 original data was compressed using 'dwz -m'. */
280 struct dwz_file
*dwz_file
;
282 /* A flag indicating wether this objfile has a section loaded at a
284 int has_section_at_zero
;
286 /* True if we are using the mapped index,
287 or we are faking it for OBJF_READNOW's sake. */
288 unsigned char using_index
;
290 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
291 struct mapped_index
*index_table
;
293 /* When using index_table, this keeps track of all quick_file_names entries.
294 TUs typically share line table entries with a CU, so we maintain a
295 separate table of all line table entries to support the sharing.
296 Note that while there can be way more TUs than CUs, we've already
297 sorted all the TUs into "type unit groups", grouped by their
298 DW_AT_stmt_list value. Therefore the only sharing done here is with a
299 CU and its associated TU group if there is one. */
300 htab_t quick_file_names_table
;
302 /* Set during partial symbol reading, to prevent queueing of full
304 int reading_partial_symbols
;
306 /* Table mapping type DIEs to their struct type *.
307 This is NULL if not allocated yet.
308 The mapping is done via (CU/TU + DIE offset) -> type. */
309 htab_t die_type_hash
;
311 /* The CUs we recently read. */
312 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
314 /* Table containing line_header indexed by offset and offset_in_dwz. */
315 htab_t line_header_hash
;
318 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
320 /* Default names of the debugging sections. */
322 /* Note that if the debugging section has been compressed, it might
323 have a name like .zdebug_info. */
325 static const struct dwarf2_debug_sections dwarf2_elf_names
=
327 { ".debug_info", ".zdebug_info" },
328 { ".debug_abbrev", ".zdebug_abbrev" },
329 { ".debug_line", ".zdebug_line" },
330 { ".debug_loc", ".zdebug_loc" },
331 { ".debug_macinfo", ".zdebug_macinfo" },
332 { ".debug_macro", ".zdebug_macro" },
333 { ".debug_str", ".zdebug_str" },
334 { ".debug_ranges", ".zdebug_ranges" },
335 { ".debug_types", ".zdebug_types" },
336 { ".debug_addr", ".zdebug_addr" },
337 { ".debug_frame", ".zdebug_frame" },
338 { ".eh_frame", NULL
},
339 { ".gdb_index", ".zgdb_index" },
343 /* List of DWO/DWP sections. */
345 static const struct dwop_section_names
347 struct dwarf2_section_names abbrev_dwo
;
348 struct dwarf2_section_names info_dwo
;
349 struct dwarf2_section_names line_dwo
;
350 struct dwarf2_section_names loc_dwo
;
351 struct dwarf2_section_names macinfo_dwo
;
352 struct dwarf2_section_names macro_dwo
;
353 struct dwarf2_section_names str_dwo
;
354 struct dwarf2_section_names str_offsets_dwo
;
355 struct dwarf2_section_names types_dwo
;
356 struct dwarf2_section_names cu_index
;
357 struct dwarf2_section_names tu_index
;
361 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
362 { ".debug_info.dwo", ".zdebug_info.dwo" },
363 { ".debug_line.dwo", ".zdebug_line.dwo" },
364 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
365 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
366 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
367 { ".debug_str.dwo", ".zdebug_str.dwo" },
368 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
369 { ".debug_types.dwo", ".zdebug_types.dwo" },
370 { ".debug_cu_index", ".zdebug_cu_index" },
371 { ".debug_tu_index", ".zdebug_tu_index" },
374 /* local data types */
376 /* The data in a compilation unit header, after target2host
377 translation, looks like this. */
378 struct comp_unit_head
382 unsigned char addr_size
;
383 unsigned char signed_addr_p
;
384 sect_offset abbrev_offset
;
386 /* Size of file offsets; either 4 or 8. */
387 unsigned int offset_size
;
389 /* Size of the length field; either 4 or 12. */
390 unsigned int initial_length_size
;
392 /* Offset to the first byte of this compilation unit header in the
393 .debug_info section, for resolving relative reference dies. */
396 /* Offset to first die in this cu from the start of the cu.
397 This will be the first byte following the compilation unit header. */
398 cu_offset first_die_offset
;
401 /* Type used for delaying computation of method physnames.
402 See comments for compute_delayed_physnames. */
403 struct delayed_method_info
405 /* The type to which the method is attached, i.e., its parent class. */
408 /* The index of the method in the type's function fieldlists. */
411 /* The index of the method in the fieldlist. */
414 /* The name of the DIE. */
417 /* The DIE associated with this method. */
418 struct die_info
*die
;
421 typedef struct delayed_method_info delayed_method_info
;
422 DEF_VEC_O (delayed_method_info
);
424 /* Internal state when decoding a particular compilation unit. */
427 /* The objfile containing this compilation unit. */
428 struct objfile
*objfile
;
430 /* The header of the compilation unit. */
431 struct comp_unit_head header
;
433 /* Base address of this compilation unit. */
434 CORE_ADDR base_address
;
436 /* Non-zero if base_address has been set. */
439 /* The language we are debugging. */
440 enum language language
;
441 const struct language_defn
*language_defn
;
443 const char *producer
;
445 /* The generic symbol table building routines have separate lists for
446 file scope symbols and all all other scopes (local scopes). So
447 we need to select the right one to pass to add_symbol_to_list().
448 We do it by keeping a pointer to the correct list in list_in_scope.
450 FIXME: The original dwarf code just treated the file scope as the
451 first local scope, and all other local scopes as nested local
452 scopes, and worked fine. Check to see if we really need to
453 distinguish these in buildsym.c. */
454 struct pending
**list_in_scope
;
456 /* The abbrev table for this CU.
457 Normally this points to the abbrev table in the objfile.
458 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
459 struct abbrev_table
*abbrev_table
;
461 /* Hash table holding all the loaded partial DIEs
462 with partial_die->offset.SECT_OFF as hash. */
465 /* Storage for things with the same lifetime as this read-in compilation
466 unit, including partial DIEs. */
467 struct obstack comp_unit_obstack
;
469 /* When multiple dwarf2_cu structures are living in memory, this field
470 chains them all together, so that they can be released efficiently.
471 We will probably also want a generation counter so that most-recently-used
472 compilation units are cached... */
473 struct dwarf2_per_cu_data
*read_in_chain
;
475 /* Backlink to our per_cu entry. */
476 struct dwarf2_per_cu_data
*per_cu
;
478 /* How many compilation units ago was this CU last referenced? */
481 /* A hash table of DIE cu_offset for following references with
482 die_info->offset.sect_off as hash. */
485 /* Full DIEs if read in. */
486 struct die_info
*dies
;
488 /* A set of pointers to dwarf2_per_cu_data objects for compilation
489 units referenced by this one. Only set during full symbol processing;
490 partial symbol tables do not have dependencies. */
493 /* Header data from the line table, during full symbol processing. */
494 struct line_header
*line_header
;
496 /* A list of methods which need to have physnames computed
497 after all type information has been read. */
498 VEC (delayed_method_info
) *method_list
;
500 /* To be copied to symtab->call_site_htab. */
501 htab_t call_site_htab
;
503 /* Non-NULL if this CU came from a DWO file.
504 There is an invariant here that is important to remember:
505 Except for attributes copied from the top level DIE in the "main"
506 (or "stub") file in preparation for reading the DWO file
507 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
508 Either there isn't a DWO file (in which case this is NULL and the point
509 is moot), or there is and either we're not going to read it (in which
510 case this is NULL) or there is and we are reading it (in which case this
512 struct dwo_unit
*dwo_unit
;
514 /* The DW_AT_addr_base attribute if present, zero otherwise
515 (zero is a valid value though).
516 Note this value comes from the Fission stub CU/TU's DIE. */
519 /* The DW_AT_ranges_base attribute if present, zero otherwise
520 (zero is a valid value though).
521 Note this value comes from the Fission stub CU/TU's DIE.
522 Also note that the value is zero in the non-DWO case so this value can
523 be used without needing to know whether DWO files are in use or not.
524 N.B. This does not apply to DW_AT_ranges appearing in
525 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
526 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
527 DW_AT_ranges_base *would* have to be applied, and we'd have to care
528 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
529 ULONGEST ranges_base
;
531 /* Mark used when releasing cached dies. */
532 unsigned int mark
: 1;
534 /* This CU references .debug_loc. See the symtab->locations_valid field.
535 This test is imperfect as there may exist optimized debug code not using
536 any location list and still facing inlining issues if handled as
537 unoptimized code. For a future better test see GCC PR other/32998. */
538 unsigned int has_loclist
: 1;
540 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
541 if all the producer_is_* fields are valid. This information is cached
542 because profiling CU expansion showed excessive time spent in
543 producer_is_gxx_lt_4_6. */
544 unsigned int checked_producer
: 1;
545 unsigned int producer_is_gxx_lt_4_6
: 1;
546 unsigned int producer_is_gcc_lt_4_3
: 1;
547 unsigned int producer_is_icc
: 1;
549 /* When set, the file that we're processing is known to have
550 debugging info for C++ namespaces. GCC 3.3.x did not produce
551 this information, but later versions do. */
553 unsigned int processing_has_namespace_info
: 1;
556 /* Persistent data held for a compilation unit, even when not
557 processing it. We put a pointer to this structure in the
558 read_symtab_private field of the psymtab. */
560 struct dwarf2_per_cu_data
562 /* The start offset and length of this compilation unit.
563 NOTE: Unlike comp_unit_head.length, this length includes
565 If the DIE refers to a DWO file, this is always of the original die,
570 /* Flag indicating this compilation unit will be read in before
571 any of the current compilation units are processed. */
572 unsigned int queued
: 1;
574 /* This flag will be set when reading partial DIEs if we need to load
575 absolutely all DIEs for this compilation unit, instead of just the ones
576 we think are interesting. It gets set if we look for a DIE in the
577 hash table and don't find it. */
578 unsigned int load_all_dies
: 1;
580 /* Non-zero if this CU is from .debug_types.
581 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
583 unsigned int is_debug_types
: 1;
585 /* Non-zero if this CU is from the .dwz file. */
586 unsigned int is_dwz
: 1;
588 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
589 This flag is only valid if is_debug_types is true.
590 We can't read a CU directly from a DWO file: There are required
591 attributes in the stub. */
592 unsigned int reading_dwo_directly
: 1;
594 /* Non-zero if the TU has been read.
595 This is used to assist the "Stay in DWO Optimization" for Fission:
596 When reading a DWO, it's faster to read TUs from the DWO instead of
597 fetching them from random other DWOs (due to comdat folding).
598 If the TU has already been read, the optimization is unnecessary
599 (and unwise - we don't want to change where gdb thinks the TU lives
601 This flag is only valid if is_debug_types is true. */
602 unsigned int tu_read
: 1;
604 /* The section this CU/TU lives in.
605 If the DIE refers to a DWO file, this is always the original die,
607 struct dwarf2_section_info
*section
;
609 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
610 of the CU cache it gets reset to NULL again. */
611 struct dwarf2_cu
*cu
;
613 /* The corresponding objfile.
614 Normally we can get the objfile from dwarf2_per_objfile.
615 However we can enter this file with just a "per_cu" handle. */
616 struct objfile
*objfile
;
618 /* When dwarf2_per_objfile->using_index is true, the 'quick' field
619 is active. Otherwise, the 'psymtab' field is active. */
622 /* The partial symbol table associated with this compilation unit,
623 or NULL for unread partial units. */
624 struct partial_symtab
*psymtab
;
626 /* Data needed by the "quick" functions. */
627 struct dwarf2_per_cu_quick_data
*quick
;
630 /* The CUs we import using DW_TAG_imported_unit. This is filled in
631 while reading psymtabs, used to compute the psymtab dependencies,
632 and then cleared. Then it is filled in again while reading full
633 symbols, and only deleted when the objfile is destroyed.
635 This is also used to work around a difference between the way gold
636 generates .gdb_index version <=7 and the way gdb does. Arguably this
637 is a gold bug. For symbols coming from TUs, gold records in the index
638 the CU that includes the TU instead of the TU itself. This breaks
639 dw2_lookup_symbol: It assumes that if the index says symbol X lives
640 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
641 will find X. Alas TUs live in their own symtab, so after expanding CU Y
642 we need to look in TU Z to find X. Fortunately, this is akin to
643 DW_TAG_imported_unit, so we just use the same mechanism: For
644 .gdb_index version <=7 this also records the TUs that the CU referred
645 to. Concurrently with this change gdb was modified to emit version 8
646 indices so we only pay a price for gold generated indices.
647 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
648 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
651 /* Entry in the signatured_types hash table. */
653 struct signatured_type
655 /* The "per_cu" object of this type.
656 This struct is used iff per_cu.is_debug_types.
657 N.B.: This is the first member so that it's easy to convert pointers
659 struct dwarf2_per_cu_data per_cu
;
661 /* The type's signature. */
664 /* Offset in the TU of the type's DIE, as read from the TU header.
665 If this TU is a DWO stub and the definition lives in a DWO file
666 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
667 cu_offset type_offset_in_tu
;
669 /* Offset in the section of the type's DIE.
670 If the definition lives in a DWO file, this is the offset in the
671 .debug_types.dwo section.
672 The value is zero until the actual value is known.
673 Zero is otherwise not a valid section offset. */
674 sect_offset type_offset_in_section
;
676 /* Type units are grouped by their DW_AT_stmt_list entry so that they
677 can share them. This points to the containing symtab. */
678 struct type_unit_group
*type_unit_group
;
681 The first time we encounter this type we fully read it in and install it
682 in the symbol tables. Subsequent times we only need the type. */
685 /* Containing DWO unit.
686 This field is valid iff per_cu.reading_dwo_directly. */
687 struct dwo_unit
*dwo_unit
;
690 typedef struct signatured_type
*sig_type_ptr
;
691 DEF_VEC_P (sig_type_ptr
);
693 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
694 This includes type_unit_group and quick_file_names. */
696 struct stmt_list_hash
698 /* The DWO unit this table is from or NULL if there is none. */
699 struct dwo_unit
*dwo_unit
;
701 /* Offset in .debug_line or .debug_line.dwo. */
702 sect_offset line_offset
;
705 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
706 an object of this type. */
708 struct type_unit_group
710 /* dwarf2read.c's main "handle" on a TU symtab.
711 To simplify things we create an artificial CU that "includes" all the
712 type units using this stmt_list so that the rest of the code still has
713 a "per_cu" handle on the symtab.
714 This PER_CU is recognized by having no section. */
715 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
716 struct dwarf2_per_cu_data per_cu
;
718 /* The TUs that share this DW_AT_stmt_list entry.
719 This is added to while parsing type units to build partial symtabs,
720 and is deleted afterwards and not used again. */
721 VEC (sig_type_ptr
) *tus
;
723 /* The compunit symtab.
724 Type units in a group needn't all be defined in the same source file,
725 so we create an essentially anonymous symtab as the compunit symtab. */
726 struct compunit_symtab
*compunit_symtab
;
728 /* The data used to construct the hash key. */
729 struct stmt_list_hash hash
;
731 /* The number of symtabs from the line header.
732 The value here must match line_header.num_file_names. */
733 unsigned int num_symtabs
;
735 /* The symbol tables for this TU (obtained from the files listed in
737 WARNING: The order of entries here must match the order of entries
738 in the line header. After the first TU using this type_unit_group, the
739 line header for the subsequent TUs is recreated from this. This is done
740 because we need to use the same symtabs for each TU using the same
741 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
742 there's no guarantee the line header doesn't have duplicate entries. */
743 struct symtab
**symtabs
;
746 /* These sections are what may appear in a (real or virtual) DWO file. */
750 struct dwarf2_section_info abbrev
;
751 struct dwarf2_section_info line
;
752 struct dwarf2_section_info loc
;
753 struct dwarf2_section_info macinfo
;
754 struct dwarf2_section_info macro
;
755 struct dwarf2_section_info str
;
756 struct dwarf2_section_info str_offsets
;
757 /* In the case of a virtual DWO file, these two are unused. */
758 struct dwarf2_section_info info
;
759 VEC (dwarf2_section_info_def
) *types
;
762 /* CUs/TUs in DWP/DWO files. */
766 /* Backlink to the containing struct dwo_file. */
767 struct dwo_file
*dwo_file
;
769 /* The "id" that distinguishes this CU/TU.
770 .debug_info calls this "dwo_id", .debug_types calls this "signature".
771 Since signatures came first, we stick with it for consistency. */
774 /* The section this CU/TU lives in, in the DWO file. */
775 struct dwarf2_section_info
*section
;
777 /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */
781 /* For types, offset in the type's DIE of the type defined by this TU. */
782 cu_offset type_offset_in_tu
;
785 /* include/dwarf2.h defines the DWP section codes.
786 It defines a max value but it doesn't define a min value, which we
787 use for error checking, so provide one. */
789 enum dwp_v2_section_ids
794 /* Data for one DWO file.
796 This includes virtual DWO files (a virtual DWO file is a DWO file as it
797 appears in a DWP file). DWP files don't really have DWO files per se -
798 comdat folding of types "loses" the DWO file they came from, and from
799 a high level view DWP files appear to contain a mass of random types.
800 However, to maintain consistency with the non-DWP case we pretend DWP
801 files contain virtual DWO files, and we assign each TU with one virtual
802 DWO file (generally based on the line and abbrev section offsets -
803 a heuristic that seems to work in practice). */
807 /* The DW_AT_GNU_dwo_name attribute.
808 For virtual DWO files the name is constructed from the section offsets
809 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
810 from related CU+TUs. */
811 const char *dwo_name
;
813 /* The DW_AT_comp_dir attribute. */
814 const char *comp_dir
;
816 /* The bfd, when the file is open. Otherwise this is NULL.
817 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
820 /* The sections that make up this DWO file.
821 Remember that for virtual DWO files in DWP V2, these are virtual
822 sections (for lack of a better name). */
823 struct dwo_sections sections
;
825 /* The CU in the file.
826 We only support one because having more than one requires hacking the
827 dwo_name of each to match, which is highly unlikely to happen.
828 Doing this means all TUs can share comp_dir: We also assume that
829 DW_AT_comp_dir across all TUs in a DWO file will be identical. */
832 /* Table of TUs in the file.
833 Each element is a struct dwo_unit. */
837 /* These sections are what may appear in a DWP file. */
841 /* These are used by both DWP version 1 and 2. */
842 struct dwarf2_section_info str
;
843 struct dwarf2_section_info cu_index
;
844 struct dwarf2_section_info tu_index
;
846 /* These are only used by DWP version 2 files.
847 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
848 sections are referenced by section number, and are not recorded here.
849 In DWP version 2 there is at most one copy of all these sections, each
850 section being (effectively) comprised of the concatenation of all of the
851 individual sections that exist in the version 1 format.
852 To keep the code simple we treat each of these concatenated pieces as a
853 section itself (a virtual section?). */
854 struct dwarf2_section_info abbrev
;
855 struct dwarf2_section_info info
;
856 struct dwarf2_section_info line
;
857 struct dwarf2_section_info loc
;
858 struct dwarf2_section_info macinfo
;
859 struct dwarf2_section_info macro
;
860 struct dwarf2_section_info str_offsets
;
861 struct dwarf2_section_info types
;
864 /* These sections are what may appear in a virtual DWO file in DWP version 1.
865 A virtual DWO file is a DWO file as it appears in a DWP file. */
867 struct virtual_v1_dwo_sections
869 struct dwarf2_section_info abbrev
;
870 struct dwarf2_section_info line
;
871 struct dwarf2_section_info loc
;
872 struct dwarf2_section_info macinfo
;
873 struct dwarf2_section_info macro
;
874 struct dwarf2_section_info str_offsets
;
875 /* Each DWP hash table entry records one CU or one TU.
876 That is recorded here, and copied to dwo_unit.section. */
877 struct dwarf2_section_info info_or_types
;
880 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
881 In version 2, the sections of the DWO files are concatenated together
882 and stored in one section of that name. Thus each ELF section contains
883 several "virtual" sections. */
885 struct virtual_v2_dwo_sections
887 bfd_size_type abbrev_offset
;
888 bfd_size_type abbrev_size
;
890 bfd_size_type line_offset
;
891 bfd_size_type line_size
;
893 bfd_size_type loc_offset
;
894 bfd_size_type loc_size
;
896 bfd_size_type macinfo_offset
;
897 bfd_size_type macinfo_size
;
899 bfd_size_type macro_offset
;
900 bfd_size_type macro_size
;
902 bfd_size_type str_offsets_offset
;
903 bfd_size_type str_offsets_size
;
905 /* Each DWP hash table entry records one CU or one TU.
906 That is recorded here, and copied to dwo_unit.section. */
907 bfd_size_type info_or_types_offset
;
908 bfd_size_type info_or_types_size
;
911 /* Contents of DWP hash tables. */
913 struct dwp_hash_table
915 uint32_t version
, nr_columns
;
916 uint32_t nr_units
, nr_slots
;
917 const gdb_byte
*hash_table
, *unit_table
;
922 const gdb_byte
*indices
;
926 /* This is indexed by column number and gives the id of the section
928 #define MAX_NR_V2_DWO_SECTIONS \
929 (1 /* .debug_info or .debug_types */ \
930 + 1 /* .debug_abbrev */ \
931 + 1 /* .debug_line */ \
932 + 1 /* .debug_loc */ \
933 + 1 /* .debug_str_offsets */ \
934 + 1 /* .debug_macro or .debug_macinfo */)
935 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
936 const gdb_byte
*offsets
;
937 const gdb_byte
*sizes
;
942 /* Data for one DWP file. */
946 /* Name of the file. */
949 /* File format version. */
955 /* Section info for this file. */
956 struct dwp_sections sections
;
958 /* Table of CUs in the file. */
959 const struct dwp_hash_table
*cus
;
961 /* Table of TUs in the file. */
962 const struct dwp_hash_table
*tus
;
964 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
968 /* Table to map ELF section numbers to their sections.
969 This is only needed for the DWP V1 file format. */
970 unsigned int num_sections
;
971 asection
**elf_sections
;
974 /* This represents a '.dwz' file. */
978 /* A dwz file can only contain a few sections. */
979 struct dwarf2_section_info abbrev
;
980 struct dwarf2_section_info info
;
981 struct dwarf2_section_info str
;
982 struct dwarf2_section_info line
;
983 struct dwarf2_section_info macro
;
984 struct dwarf2_section_info gdb_index
;
990 /* Struct used to pass misc. parameters to read_die_and_children, et
991 al. which are used for both .debug_info and .debug_types dies.
992 All parameters here are unchanging for the life of the call. This
993 struct exists to abstract away the constant parameters of die reading. */
995 struct die_reader_specs
997 /* The bfd of die_section. */
1000 /* The CU of the DIE we are parsing. */
1001 struct dwarf2_cu
*cu
;
1003 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
1004 struct dwo_file
*dwo_file
;
1006 /* The section the die comes from.
1007 This is either .debug_info or .debug_types, or the .dwo variants. */
1008 struct dwarf2_section_info
*die_section
;
1010 /* die_section->buffer. */
1011 const gdb_byte
*buffer
;
1013 /* The end of the buffer. */
1014 const gdb_byte
*buffer_end
;
1016 /* The value of the DW_AT_comp_dir attribute. */
1017 const char *comp_dir
;
1020 /* Type of function passed to init_cutu_and_read_dies, et.al. */
1021 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
1022 const gdb_byte
*info_ptr
,
1023 struct die_info
*comp_unit_die
,
1030 unsigned int dir_index
;
1031 unsigned int mod_time
;
1032 unsigned int length
;
1033 /* Non-zero if referenced by the Line Number Program. */
1035 /* The associated symbol table, if any. */
1036 struct symtab
*symtab
;
1039 /* The line number information for a compilation unit (found in the
1040 .debug_line section) begins with a "statement program header",
1041 which contains the following information. */
1044 /* Offset of line number information in .debug_line section. */
1047 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1048 unsigned offset_in_dwz
: 1;
1050 unsigned int total_length
;
1051 unsigned short version
;
1052 unsigned int header_length
;
1053 unsigned char minimum_instruction_length
;
1054 unsigned char maximum_ops_per_instruction
;
1055 unsigned char default_is_stmt
;
1057 unsigned char line_range
;
1058 unsigned char opcode_base
;
1060 /* standard_opcode_lengths[i] is the number of operands for the
1061 standard opcode whose value is i. This means that
1062 standard_opcode_lengths[0] is unused, and the last meaningful
1063 element is standard_opcode_lengths[opcode_base - 1]. */
1064 unsigned char *standard_opcode_lengths
;
1066 /* The include_directories table. NOTE! These strings are not
1067 allocated with xmalloc; instead, they are pointers into
1068 debug_line_buffer. If you try to free them, `free' will get
1070 unsigned int num_include_dirs
, include_dirs_size
;
1071 const char **include_dirs
;
1073 /* The file_names table. NOTE! These strings are not allocated
1074 with xmalloc; instead, they are pointers into debug_line_buffer.
1075 Don't try to free them directly. */
1076 unsigned int num_file_names
, file_names_size
;
1077 struct file_entry
*file_names
;
1079 /* The start and end of the statement program following this
1080 header. These point into dwarf2_per_objfile->line_buffer. */
1081 const gdb_byte
*statement_program_start
, *statement_program_end
;
1084 /* When we construct a partial symbol table entry we only
1085 need this much information. */
1086 struct partial_die_info
1088 /* Offset of this DIE. */
1091 /* DWARF-2 tag for this DIE. */
1092 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1094 /* Assorted flags describing the data found in this DIE. */
1095 unsigned int has_children
: 1;
1096 unsigned int is_external
: 1;
1097 unsigned int is_declaration
: 1;
1098 unsigned int has_type
: 1;
1099 unsigned int has_specification
: 1;
1100 unsigned int has_pc_info
: 1;
1101 unsigned int may_be_inlined
: 1;
1103 /* Flag set if the SCOPE field of this structure has been
1105 unsigned int scope_set
: 1;
1107 /* Flag set if the DIE has a byte_size attribute. */
1108 unsigned int has_byte_size
: 1;
1110 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1111 unsigned int has_const_value
: 1;
1113 /* Flag set if any of the DIE's children are template arguments. */
1114 unsigned int has_template_arguments
: 1;
1116 /* Flag set if fixup_partial_die has been called on this die. */
1117 unsigned int fixup_called
: 1;
1119 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1120 unsigned int is_dwz
: 1;
1122 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1123 unsigned int spec_is_dwz
: 1;
1125 /* The name of this DIE. Normally the value of DW_AT_name, but
1126 sometimes a default name for unnamed DIEs. */
1129 /* The linkage name, if present. */
1130 const char *linkage_name
;
1132 /* The scope to prepend to our children. This is generally
1133 allocated on the comp_unit_obstack, so will disappear
1134 when this compilation unit leaves the cache. */
1137 /* Some data associated with the partial DIE. The tag determines
1138 which field is live. */
1141 /* The location description associated with this DIE, if any. */
1142 struct dwarf_block
*locdesc
;
1143 /* The offset of an import, for DW_TAG_imported_unit. */
1147 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1151 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1152 DW_AT_sibling, if any. */
1153 /* NOTE: This member isn't strictly necessary, read_partial_die could
1154 return DW_AT_sibling values to its caller load_partial_dies. */
1155 const gdb_byte
*sibling
;
1157 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1158 DW_AT_specification (or DW_AT_abstract_origin or
1159 DW_AT_extension). */
1160 sect_offset spec_offset
;
1162 /* Pointers to this DIE's parent, first child, and next sibling,
1164 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
1167 /* This data structure holds the information of an abbrev. */
1170 unsigned int number
; /* number identifying abbrev */
1171 enum dwarf_tag tag
; /* dwarf tag */
1172 unsigned short has_children
; /* boolean */
1173 unsigned short num_attrs
; /* number of attributes */
1174 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1175 struct abbrev_info
*next
; /* next in chain */
1180 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1181 ENUM_BITFIELD(dwarf_form
) form
: 16;
1184 /* Size of abbrev_table.abbrev_hash_table. */
1185 #define ABBREV_HASH_SIZE 121
1187 /* Top level data structure to contain an abbreviation table. */
1191 /* Where the abbrev table came from.
1192 This is used as a sanity check when the table is used. */
1195 /* Storage for the abbrev table. */
1196 struct obstack abbrev_obstack
;
1198 /* Hash table of abbrevs.
1199 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1200 It could be statically allocated, but the previous code didn't so we
1202 struct abbrev_info
**abbrevs
;
1205 /* Attributes have a name and a value. */
1208 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1209 ENUM_BITFIELD(dwarf_form
) form
: 15;
1211 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1212 field should be in u.str (existing only for DW_STRING) but it is kept
1213 here for better struct attribute alignment. */
1214 unsigned int string_is_canonical
: 1;
1219 struct dwarf_block
*blk
;
1228 /* This data structure holds a complete die structure. */
1231 /* DWARF-2 tag for this DIE. */
1232 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1234 /* Number of attributes */
1235 unsigned char num_attrs
;
1237 /* True if we're presently building the full type name for the
1238 type derived from this DIE. */
1239 unsigned char building_fullname
: 1;
1241 /* True if this die is in process. PR 16581. */
1242 unsigned char in_process
: 1;
1245 unsigned int abbrev
;
1247 /* Offset in .debug_info or .debug_types section. */
1250 /* The dies in a compilation unit form an n-ary tree. PARENT
1251 points to this die's parent; CHILD points to the first child of
1252 this node; and all the children of a given node are chained
1253 together via their SIBLING fields. */
1254 struct die_info
*child
; /* Its first child, if any. */
1255 struct die_info
*sibling
; /* Its next sibling, if any. */
1256 struct die_info
*parent
; /* Its parent, if any. */
1258 /* An array of attributes, with NUM_ATTRS elements. There may be
1259 zero, but it's not common and zero-sized arrays are not
1260 sufficiently portable C. */
1261 struct attribute attrs
[1];
1264 /* Get at parts of an attribute structure. */
1266 #define DW_STRING(attr) ((attr)->u.str)
1267 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1268 #define DW_UNSND(attr) ((attr)->u.unsnd)
1269 #define DW_BLOCK(attr) ((attr)->u.blk)
1270 #define DW_SND(attr) ((attr)->u.snd)
1271 #define DW_ADDR(attr) ((attr)->u.addr)
1272 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1274 /* Blocks are a bunch of untyped bytes. */
1279 /* Valid only if SIZE is not zero. */
1280 const gdb_byte
*data
;
1283 #ifndef ATTR_ALLOC_CHUNK
1284 #define ATTR_ALLOC_CHUNK 4
1287 /* Allocate fields for structs, unions and enums in this size. */
1288 #ifndef DW_FIELD_ALLOC_CHUNK
1289 #define DW_FIELD_ALLOC_CHUNK 4
1292 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1293 but this would require a corresponding change in unpack_field_as_long
1295 static int bits_per_byte
= 8;
1299 struct nextfield
*next
;
1307 struct nextfnfield
*next
;
1308 struct fn_field fnfield
;
1315 struct nextfnfield
*head
;
1318 struct typedef_field_list
1320 struct typedef_field field
;
1321 struct typedef_field_list
*next
;
1324 /* The routines that read and process dies for a C struct or C++ class
1325 pass lists of data member fields and lists of member function fields
1326 in an instance of a field_info structure, as defined below. */
1329 /* List of data member and baseclasses fields. */
1330 struct nextfield
*fields
, *baseclasses
;
1332 /* Number of fields (including baseclasses). */
1335 /* Number of baseclasses. */
1338 /* Set if the accesibility of one of the fields is not public. */
1339 int non_public_fields
;
1341 /* Member function fields array, entries are allocated in the order they
1342 are encountered in the object file. */
1343 struct nextfnfield
*fnfields
;
1345 /* Member function fieldlist array, contains name of possibly overloaded
1346 member function, number of overloaded member functions and a pointer
1347 to the head of the member function field chain. */
1348 struct fnfieldlist
*fnfieldlists
;
1350 /* Number of entries in the fnfieldlists array. */
1353 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1354 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1355 struct typedef_field_list
*typedef_field_list
;
1356 unsigned typedef_field_list_count
;
1359 /* One item on the queue of compilation units to read in full symbols
1361 struct dwarf2_queue_item
1363 struct dwarf2_per_cu_data
*per_cu
;
1364 enum language pretend_language
;
1365 struct dwarf2_queue_item
*next
;
1368 /* The current queue. */
1369 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1371 /* Loaded secondary compilation units are kept in memory until they
1372 have not been referenced for the processing of this many
1373 compilation units. Set this to zero to disable caching. Cache
1374 sizes of up to at least twenty will improve startup time for
1375 typical inter-CU-reference binaries, at an obvious memory cost. */
1376 static int dwarf2_max_cache_age
= 5;
1378 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
1379 struct cmd_list_element
*c
, const char *value
)
1381 fprintf_filtered (file
, _("The upper bound on the age of cached "
1382 "dwarf2 compilation units is %s.\n"),
1386 /* local function prototypes */
1388 static const char *get_section_name (const struct dwarf2_section_info
*);
1390 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1392 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1394 static void dwarf2_find_base_address (struct die_info
*die
,
1395 struct dwarf2_cu
*cu
);
1397 static struct partial_symtab
*create_partial_symtab
1398 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1400 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1402 static void scan_partial_symbols (struct partial_die_info
*,
1403 CORE_ADDR
*, CORE_ADDR
*,
1404 int, struct dwarf2_cu
*);
1406 static void add_partial_symbol (struct partial_die_info
*,
1407 struct dwarf2_cu
*);
1409 static void add_partial_namespace (struct partial_die_info
*pdi
,
1410 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1411 int set_addrmap
, struct dwarf2_cu
*cu
);
1413 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1414 CORE_ADDR
*highpc
, int set_addrmap
,
1415 struct dwarf2_cu
*cu
);
1417 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1418 struct dwarf2_cu
*cu
);
1420 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1421 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1422 int need_pc
, struct dwarf2_cu
*cu
);
1424 static void dwarf2_read_symtab (struct partial_symtab
*,
1427 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1429 static struct abbrev_info
*abbrev_table_lookup_abbrev
1430 (const struct abbrev_table
*, unsigned int);
1432 static struct abbrev_table
*abbrev_table_read_table
1433 (struct dwarf2_section_info
*, sect_offset
);
1435 static void abbrev_table_free (struct abbrev_table
*);
1437 static void abbrev_table_free_cleanup (void *);
1439 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1440 struct dwarf2_section_info
*);
1442 static void dwarf2_free_abbrev_table (void *);
1444 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1446 static struct partial_die_info
*load_partial_dies
1447 (const struct die_reader_specs
*, const gdb_byte
*, int);
1449 static const gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1450 struct partial_die_info
*,
1451 struct abbrev_info
*,
1455 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1456 struct dwarf2_cu
*);
1458 static void fixup_partial_die (struct partial_die_info
*,
1459 struct dwarf2_cu
*);
1461 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1462 struct attribute
*, struct attr_abbrev
*,
1465 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1467 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1469 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1471 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1473 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1475 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1478 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1480 static LONGEST read_checked_initial_length_and_offset
1481 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1482 unsigned int *, unsigned int *);
1484 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1485 const struct comp_unit_head
*,
1488 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1490 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1493 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1495 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1497 static const char *read_indirect_string (bfd
*, const gdb_byte
*,
1498 const struct comp_unit_head
*,
1501 static const char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1503 static ULONGEST
read_unsigned_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1505 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1507 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1511 static const char *read_str_index (const struct die_reader_specs
*reader
,
1512 ULONGEST str_index
);
1514 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1516 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1517 struct dwarf2_cu
*);
1519 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1522 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1523 struct dwarf2_cu
*cu
);
1525 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1527 static struct die_info
*die_specification (struct die_info
*die
,
1528 struct dwarf2_cu
**);
1530 static void free_line_header (struct line_header
*lh
);
1532 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1533 struct dwarf2_cu
*cu
);
1535 static void dwarf_decode_lines (struct line_header
*, const char *,
1536 struct dwarf2_cu
*, struct partial_symtab
*,
1537 CORE_ADDR
, int decode_mapping
);
1539 static void dwarf2_start_subfile (const char *, const char *);
1541 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1542 const char *, const char *,
1545 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1546 struct dwarf2_cu
*);
1548 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1549 struct dwarf2_cu
*, struct symbol
*);
1551 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1552 struct dwarf2_cu
*);
1554 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1557 struct obstack
*obstack
,
1558 struct dwarf2_cu
*cu
, LONGEST
*value
,
1559 const gdb_byte
**bytes
,
1560 struct dwarf2_locexpr_baton
**baton
);
1562 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1564 static int need_gnat_info (struct dwarf2_cu
*);
1566 static struct type
*die_descriptive_type (struct die_info
*,
1567 struct dwarf2_cu
*);
1569 static void set_descriptive_type (struct type
*, struct die_info
*,
1570 struct dwarf2_cu
*);
1572 static struct type
*die_containing_type (struct die_info
*,
1573 struct dwarf2_cu
*);
1575 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1576 struct dwarf2_cu
*);
1578 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1580 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1582 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1584 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1585 const char *suffix
, int physname
,
1586 struct dwarf2_cu
*cu
);
1588 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1590 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1592 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1594 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1596 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1598 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1599 struct dwarf2_cu
*, struct partial_symtab
*);
1601 static int dwarf2_get_pc_bounds (struct die_info
*,
1602 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1603 struct partial_symtab
*);
1605 static void get_scope_pc_bounds (struct die_info
*,
1606 CORE_ADDR
*, CORE_ADDR
*,
1607 struct dwarf2_cu
*);
1609 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1610 CORE_ADDR
, struct dwarf2_cu
*);
1612 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1613 struct dwarf2_cu
*);
1615 static void dwarf2_attach_fields_to_type (struct field_info
*,
1616 struct type
*, struct dwarf2_cu
*);
1618 static void dwarf2_add_member_fn (struct field_info
*,
1619 struct die_info
*, struct type
*,
1620 struct dwarf2_cu
*);
1622 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1624 struct dwarf2_cu
*);
1626 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1628 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1630 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1632 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1634 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1636 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1638 static struct type
*read_module_type (struct die_info
*die
,
1639 struct dwarf2_cu
*cu
);
1641 static const char *namespace_name (struct die_info
*die
,
1642 int *is_anonymous
, struct dwarf2_cu
*);
1644 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1646 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1648 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1649 struct dwarf2_cu
*);
1651 static struct die_info
*read_die_and_siblings_1
1652 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1655 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1656 const gdb_byte
*info_ptr
,
1657 const gdb_byte
**new_info_ptr
,
1658 struct die_info
*parent
);
1660 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1661 struct die_info
**, const gdb_byte
*,
1664 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1665 struct die_info
**, const gdb_byte
*,
1668 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1670 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1673 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1675 static const char *dwarf2_full_name (const char *name
,
1676 struct die_info
*die
,
1677 struct dwarf2_cu
*cu
);
1679 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1680 struct dwarf2_cu
*cu
);
1682 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1683 struct dwarf2_cu
**);
1685 static const char *dwarf_tag_name (unsigned int);
1687 static const char *dwarf_attr_name (unsigned int);
1689 static const char *dwarf_form_name (unsigned int);
1691 static char *dwarf_bool_name (unsigned int);
1693 static const char *dwarf_type_encoding_name (unsigned int);
1695 static struct die_info
*sibling_die (struct die_info
*);
1697 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1699 static void dump_die_for_error (struct die_info
*);
1701 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1704 /*static*/ void dump_die (struct die_info
*, int max_level
);
1706 static void store_in_ref_table (struct die_info
*,
1707 struct dwarf2_cu
*);
1709 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1711 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1713 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1714 const struct attribute
*,
1715 struct dwarf2_cu
**);
1717 static struct die_info
*follow_die_ref (struct die_info
*,
1718 const struct attribute
*,
1719 struct dwarf2_cu
**);
1721 static struct die_info
*follow_die_sig (struct die_info
*,
1722 const struct attribute
*,
1723 struct dwarf2_cu
**);
1725 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1726 struct dwarf2_cu
*);
1728 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1729 const struct attribute
*,
1730 struct dwarf2_cu
*);
1732 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1734 static void read_signatured_type (struct signatured_type
*);
1736 /* memory allocation interface */
1738 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1740 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1742 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1744 static int attr_form_is_block (const struct attribute
*);
1746 static int attr_form_is_section_offset (const struct attribute
*);
1748 static int attr_form_is_constant (const struct attribute
*);
1750 static int attr_form_is_ref (const struct attribute
*);
1752 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1753 struct dwarf2_loclist_baton
*baton
,
1754 const struct attribute
*attr
);
1756 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1758 struct dwarf2_cu
*cu
,
1761 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1762 const gdb_byte
*info_ptr
,
1763 struct abbrev_info
*abbrev
);
1765 static void free_stack_comp_unit (void *);
1767 static hashval_t
partial_die_hash (const void *item
);
1769 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1771 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1772 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1774 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1775 struct dwarf2_per_cu_data
*per_cu
);
1777 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1778 struct die_info
*comp_unit_die
,
1779 enum language pretend_language
);
1781 static void free_heap_comp_unit (void *);
1783 static void free_cached_comp_units (void *);
1785 static void age_cached_comp_units (void);
1787 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1789 static struct type
*set_die_type (struct die_info
*, struct type
*,
1790 struct dwarf2_cu
*);
1792 static void create_all_comp_units (struct objfile
*);
1794 static int create_all_type_units (struct objfile
*);
1796 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1799 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1802 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1805 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1806 struct dwarf2_per_cu_data
*);
1808 static void dwarf2_mark (struct dwarf2_cu
*);
1810 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1812 static struct type
*get_die_type_at_offset (sect_offset
,
1813 struct dwarf2_per_cu_data
*);
1815 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1817 static void dwarf2_release_queue (void *dummy
);
1819 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1820 enum language pretend_language
);
1822 static void process_queue (void);
1824 static void find_file_and_directory (struct die_info
*die
,
1825 struct dwarf2_cu
*cu
,
1826 const char **name
, const char **comp_dir
);
1828 static char *file_full_name (int file
, struct line_header
*lh
,
1829 const char *comp_dir
);
1831 static const gdb_byte
*read_and_check_comp_unit_head
1832 (struct comp_unit_head
*header
,
1833 struct dwarf2_section_info
*section
,
1834 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1835 int is_debug_types_section
);
1837 static void init_cutu_and_read_dies
1838 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1839 int use_existing_cu
, int keep
,
1840 die_reader_func_ftype
*die_reader_func
, void *data
);
1842 static void init_cutu_and_read_dies_simple
1843 (struct dwarf2_per_cu_data
*this_cu
,
1844 die_reader_func_ftype
*die_reader_func
, void *data
);
1846 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1848 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1850 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1851 (struct dwp_file
*dwp_file
, const char *comp_dir
,
1852 ULONGEST signature
, int is_debug_types
);
1854 static struct dwp_file
*get_dwp_file (void);
1856 static struct dwo_unit
*lookup_dwo_comp_unit
1857 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1859 static struct dwo_unit
*lookup_dwo_type_unit
1860 (struct signatured_type
*, const char *, const char *);
1862 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1864 static void free_dwo_file_cleanup (void *);
1866 static void process_cu_includes (void);
1868 static void check_producer (struct dwarf2_cu
*cu
);
1870 static void free_line_header_voidp (void *arg
);
1872 /* Various complaints about symbol reading that don't abort the process. */
1875 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1877 complaint (&symfile_complaints
,
1878 _("statement list doesn't fit in .debug_line section"));
1882 dwarf2_debug_line_missing_file_complaint (void)
1884 complaint (&symfile_complaints
,
1885 _(".debug_line section has line data without a file"));
1889 dwarf2_debug_line_missing_end_sequence_complaint (void)
1891 complaint (&symfile_complaints
,
1892 _(".debug_line section has line "
1893 "program sequence without an end"));
1897 dwarf2_complex_location_expr_complaint (void)
1899 complaint (&symfile_complaints
, _("location expression too complex"));
1903 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1906 complaint (&symfile_complaints
,
1907 _("const value length mismatch for '%s', got %d, expected %d"),
1912 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1914 complaint (&symfile_complaints
,
1915 _("debug info runs off end of %s section"
1917 get_section_name (section
),
1918 get_section_file_name (section
));
1922 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1924 complaint (&symfile_complaints
,
1925 _("macro debug info contains a "
1926 "malformed macro definition:\n`%s'"),
1931 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1933 complaint (&symfile_complaints
,
1934 _("invalid attribute class or form for '%s' in '%s'"),
1938 /* Hash function for line_header_hash. */
1941 line_header_hash (const struct line_header
*ofs
)
1943 return ofs
->offset
.sect_off
^ ofs
->offset_in_dwz
;
1946 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1949 line_header_hash_voidp (const void *item
)
1951 const struct line_header
*ofs
= item
;
1953 return line_header_hash (ofs
);
1956 /* Equality function for line_header_hash. */
1959 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1961 const struct line_header
*ofs_lhs
= item_lhs
;
1962 const struct line_header
*ofs_rhs
= item_rhs
;
1964 return (ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
1965 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1971 /* Convert VALUE between big- and little-endian. */
1973 byte_swap (offset_type value
)
1977 result
= (value
& 0xff) << 24;
1978 result
|= (value
& 0xff00) << 8;
1979 result
|= (value
& 0xff0000) >> 8;
1980 result
|= (value
& 0xff000000) >> 24;
1984 #define MAYBE_SWAP(V) byte_swap (V)
1987 #define MAYBE_SWAP(V) (V)
1988 #endif /* WORDS_BIGENDIAN */
1990 /* Read the given attribute value as an address, taking the attribute's
1991 form into account. */
1994 attr_value_as_address (struct attribute
*attr
)
1998 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2000 /* Aside from a few clearly defined exceptions, attributes that
2001 contain an address must always be in DW_FORM_addr form.
2002 Unfortunately, some compilers happen to be violating this
2003 requirement by encoding addresses using other forms, such
2004 as DW_FORM_data4 for example. For those broken compilers,
2005 we try to do our best, without any guarantee of success,
2006 to interpret the address correctly. It would also be nice
2007 to generate a complaint, but that would require us to maintain
2008 a list of legitimate cases where a non-address form is allowed,
2009 as well as update callers to pass in at least the CU's DWARF
2010 version. This is more overhead than what we're willing to
2011 expand for a pretty rare case. */
2012 addr
= DW_UNSND (attr
);
2015 addr
= DW_ADDR (attr
);
2020 /* The suffix for an index file. */
2021 #define INDEX_SUFFIX ".gdb-index"
2023 /* Try to locate the sections we need for DWARF 2 debugging
2024 information and return true if we have enough to do something.
2025 NAMES points to the dwarf2 section names, or is NULL if the standard
2026 ELF names are used. */
2029 dwarf2_has_info (struct objfile
*objfile
,
2030 const struct dwarf2_debug_sections
*names
)
2032 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2033 if (!dwarf2_per_objfile
)
2035 /* Initialize per-objfile state. */
2036 struct dwarf2_per_objfile
*data
2037 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
2039 memset (data
, 0, sizeof (*data
));
2040 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
2041 dwarf2_per_objfile
= data
;
2043 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
2045 dwarf2_per_objfile
->objfile
= objfile
;
2047 return (!dwarf2_per_objfile
->info
.is_virtual
2048 && dwarf2_per_objfile
->info
.s
.asection
!= NULL
2049 && !dwarf2_per_objfile
->abbrev
.is_virtual
2050 && dwarf2_per_objfile
->abbrev
.s
.asection
!= NULL
);
2053 /* Return the containing section of virtual section SECTION. */
2055 static struct dwarf2_section_info
*
2056 get_containing_section (const struct dwarf2_section_info
*section
)
2058 gdb_assert (section
->is_virtual
);
2059 return section
->s
.containing_section
;
2062 /* Return the bfd owner of SECTION. */
2065 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2067 if (section
->is_virtual
)
2069 section
= get_containing_section (section
);
2070 gdb_assert (!section
->is_virtual
);
2072 return section
->s
.asection
->owner
;
2075 /* Return the bfd section of SECTION.
2076 Returns NULL if the section is not present. */
2079 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2081 if (section
->is_virtual
)
2083 section
= get_containing_section (section
);
2084 gdb_assert (!section
->is_virtual
);
2086 return section
->s
.asection
;
2089 /* Return the name of SECTION. */
2092 get_section_name (const struct dwarf2_section_info
*section
)
2094 asection
*sectp
= get_section_bfd_section (section
);
2096 gdb_assert (sectp
!= NULL
);
2097 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2100 /* Return the name of the file SECTION is in. */
2103 get_section_file_name (const struct dwarf2_section_info
*section
)
2105 bfd
*abfd
= get_section_bfd_owner (section
);
2107 return bfd_get_filename (abfd
);
2110 /* Return the id of SECTION.
2111 Returns 0 if SECTION doesn't exist. */
2114 get_section_id (const struct dwarf2_section_info
*section
)
2116 asection
*sectp
= get_section_bfd_section (section
);
2123 /* Return the flags of SECTION.
2124 SECTION (or containing section if this is a virtual section) must exist. */
2127 get_section_flags (const struct dwarf2_section_info
*section
)
2129 asection
*sectp
= get_section_bfd_section (section
);
2131 gdb_assert (sectp
!= NULL
);
2132 return bfd_get_section_flags (sectp
->owner
, sectp
);
2135 /* When loading sections, we look either for uncompressed section or for
2136 compressed section names. */
2139 section_is_p (const char *section_name
,
2140 const struct dwarf2_section_names
*names
)
2142 if (names
->normal
!= NULL
2143 && strcmp (section_name
, names
->normal
) == 0)
2145 if (names
->compressed
!= NULL
2146 && strcmp (section_name
, names
->compressed
) == 0)
2151 /* This function is mapped across the sections and remembers the
2152 offset and size of each of the debugging sections we are interested
2156 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
2158 const struct dwarf2_debug_sections
*names
;
2159 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2162 names
= &dwarf2_elf_names
;
2164 names
= (const struct dwarf2_debug_sections
*) vnames
;
2166 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2169 else if (section_is_p (sectp
->name
, &names
->info
))
2171 dwarf2_per_objfile
->info
.s
.asection
= sectp
;
2172 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
2174 else if (section_is_p (sectp
->name
, &names
->abbrev
))
2176 dwarf2_per_objfile
->abbrev
.s
.asection
= sectp
;
2177 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
2179 else if (section_is_p (sectp
->name
, &names
->line
))
2181 dwarf2_per_objfile
->line
.s
.asection
= sectp
;
2182 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
2184 else if (section_is_p (sectp
->name
, &names
->loc
))
2186 dwarf2_per_objfile
->loc
.s
.asection
= sectp
;
2187 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
2189 else if (section_is_p (sectp
->name
, &names
->macinfo
))
2191 dwarf2_per_objfile
->macinfo
.s
.asection
= sectp
;
2192 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
2194 else if (section_is_p (sectp
->name
, &names
->macro
))
2196 dwarf2_per_objfile
->macro
.s
.asection
= sectp
;
2197 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
2199 else if (section_is_p (sectp
->name
, &names
->str
))
2201 dwarf2_per_objfile
->str
.s
.asection
= sectp
;
2202 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
2204 else if (section_is_p (sectp
->name
, &names
->addr
))
2206 dwarf2_per_objfile
->addr
.s
.asection
= sectp
;
2207 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
2209 else if (section_is_p (sectp
->name
, &names
->frame
))
2211 dwarf2_per_objfile
->frame
.s
.asection
= sectp
;
2212 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
2214 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
2216 dwarf2_per_objfile
->eh_frame
.s
.asection
= sectp
;
2217 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
2219 else if (section_is_p (sectp
->name
, &names
->ranges
))
2221 dwarf2_per_objfile
->ranges
.s
.asection
= sectp
;
2222 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
2224 else if (section_is_p (sectp
->name
, &names
->types
))
2226 struct dwarf2_section_info type_section
;
2228 memset (&type_section
, 0, sizeof (type_section
));
2229 type_section
.s
.asection
= sectp
;
2230 type_section
.size
= bfd_get_section_size (sectp
);
2232 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
2235 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
2237 dwarf2_per_objfile
->gdb_index
.s
.asection
= sectp
;
2238 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
2241 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
2242 && bfd_section_vma (abfd
, sectp
) == 0)
2243 dwarf2_per_objfile
->has_section_at_zero
= 1;
2246 /* A helper function that decides whether a section is empty,
2250 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2252 if (section
->is_virtual
)
2253 return section
->size
== 0;
2254 return section
->s
.asection
== NULL
|| section
->size
== 0;
2257 /* Read the contents of the section INFO.
2258 OBJFILE is the main object file, but not necessarily the file where
2259 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2261 If the section is compressed, uncompress it before returning. */
2264 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2268 gdb_byte
*buf
, *retbuf
;
2272 info
->buffer
= NULL
;
2275 if (dwarf2_section_empty_p (info
))
2278 sectp
= get_section_bfd_section (info
);
2280 /* If this is a virtual section we need to read in the real one first. */
2281 if (info
->is_virtual
)
2283 struct dwarf2_section_info
*containing_section
=
2284 get_containing_section (info
);
2286 gdb_assert (sectp
!= NULL
);
2287 if ((sectp
->flags
& SEC_RELOC
) != 0)
2289 error (_("Dwarf Error: DWP format V2 with relocations is not"
2290 " supported in section %s [in module %s]"),
2291 get_section_name (info
), get_section_file_name (info
));
2293 dwarf2_read_section (objfile
, containing_section
);
2294 /* Other code should have already caught virtual sections that don't
2296 gdb_assert (info
->virtual_offset
+ info
->size
2297 <= containing_section
->size
);
2298 /* If the real section is empty or there was a problem reading the
2299 section we shouldn't get here. */
2300 gdb_assert (containing_section
->buffer
!= NULL
);
2301 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2305 /* If the section has relocations, we must read it ourselves.
2306 Otherwise we attach it to the BFD. */
2307 if ((sectp
->flags
& SEC_RELOC
) == 0)
2309 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2313 buf
= obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2316 /* When debugging .o files, we may need to apply relocations; see
2317 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2318 We never compress sections in .o files, so we only need to
2319 try this when the section is not compressed. */
2320 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2323 info
->buffer
= retbuf
;
2327 abfd
= get_section_bfd_owner (info
);
2328 gdb_assert (abfd
!= NULL
);
2330 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2331 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2333 error (_("Dwarf Error: Can't read DWARF data"
2334 " in section %s [in module %s]"),
2335 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2339 /* A helper function that returns the size of a section in a safe way.
2340 If you are positive that the section has been read before using the
2341 size, then it is safe to refer to the dwarf2_section_info object's
2342 "size" field directly. In other cases, you must call this
2343 function, because for compressed sections the size field is not set
2344 correctly until the section has been read. */
2346 static bfd_size_type
2347 dwarf2_section_size (struct objfile
*objfile
,
2348 struct dwarf2_section_info
*info
)
2351 dwarf2_read_section (objfile
, info
);
2355 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2359 dwarf2_get_section_info (struct objfile
*objfile
,
2360 enum dwarf2_section_enum sect
,
2361 asection
**sectp
, const gdb_byte
**bufp
,
2362 bfd_size_type
*sizep
)
2364 struct dwarf2_per_objfile
*data
2365 = objfile_data (objfile
, dwarf2_objfile_data_key
);
2366 struct dwarf2_section_info
*info
;
2368 /* We may see an objfile without any DWARF, in which case we just
2379 case DWARF2_DEBUG_FRAME
:
2380 info
= &data
->frame
;
2382 case DWARF2_EH_FRAME
:
2383 info
= &data
->eh_frame
;
2386 gdb_assert_not_reached ("unexpected section");
2389 dwarf2_read_section (objfile
, info
);
2391 *sectp
= get_section_bfd_section (info
);
2392 *bufp
= info
->buffer
;
2393 *sizep
= info
->size
;
2396 /* A helper function to find the sections for a .dwz file. */
2399 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2401 struct dwz_file
*dwz_file
= arg
;
2403 /* Note that we only support the standard ELF names, because .dwz
2404 is ELF-only (at the time of writing). */
2405 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2407 dwz_file
->abbrev
.s
.asection
= sectp
;
2408 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2410 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2412 dwz_file
->info
.s
.asection
= sectp
;
2413 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2415 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2417 dwz_file
->str
.s
.asection
= sectp
;
2418 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2420 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2422 dwz_file
->line
.s
.asection
= sectp
;
2423 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2425 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2427 dwz_file
->macro
.s
.asection
= sectp
;
2428 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2430 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2432 dwz_file
->gdb_index
.s
.asection
= sectp
;
2433 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2437 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2438 there is no .gnu_debugaltlink section in the file. Error if there
2439 is such a section but the file cannot be found. */
2441 static struct dwz_file
*
2442 dwarf2_get_dwz_file (void)
2446 struct cleanup
*cleanup
;
2447 const char *filename
;
2448 struct dwz_file
*result
;
2449 bfd_size_type buildid_len_arg
;
2453 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2454 return dwarf2_per_objfile
->dwz_file
;
2456 bfd_set_error (bfd_error_no_error
);
2457 data
= bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2458 &buildid_len_arg
, &buildid
);
2461 if (bfd_get_error () == bfd_error_no_error
)
2463 error (_("could not read '.gnu_debugaltlink' section: %s"),
2464 bfd_errmsg (bfd_get_error ()));
2466 cleanup
= make_cleanup (xfree
, data
);
2467 make_cleanup (xfree
, buildid
);
2469 buildid_len
= (size_t) buildid_len_arg
;
2471 filename
= (const char *) data
;
2472 if (!IS_ABSOLUTE_PATH (filename
))
2474 char *abs
= gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2477 make_cleanup (xfree
, abs
);
2478 abs
= ldirname (abs
);
2479 make_cleanup (xfree
, abs
);
2481 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2482 make_cleanup (xfree
, rel
);
2486 /* First try the file name given in the section. If that doesn't
2487 work, try to use the build-id instead. */
2488 dwz_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2489 if (dwz_bfd
!= NULL
)
2491 if (!build_id_verify (dwz_bfd
, buildid_len
, buildid
))
2493 gdb_bfd_unref (dwz_bfd
);
2498 if (dwz_bfd
== NULL
)
2499 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2501 if (dwz_bfd
== NULL
)
2502 error (_("could not find '.gnu_debugaltlink' file for %s"),
2503 objfile_name (dwarf2_per_objfile
->objfile
));
2505 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2507 result
->dwz_bfd
= dwz_bfd
;
2509 bfd_map_over_sections (dwz_bfd
, locate_dwz_sections
, result
);
2511 do_cleanups (cleanup
);
2513 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, dwz_bfd
);
2514 dwarf2_per_objfile
->dwz_file
= result
;
2518 /* DWARF quick_symbols_functions support. */
2520 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2521 unique line tables, so we maintain a separate table of all .debug_line
2522 derived entries to support the sharing.
2523 All the quick functions need is the list of file names. We discard the
2524 line_header when we're done and don't need to record it here. */
2525 struct quick_file_names
2527 /* The data used to construct the hash key. */
2528 struct stmt_list_hash hash
;
2530 /* The number of entries in file_names, real_names. */
2531 unsigned int num_file_names
;
2533 /* The file names from the line table, after being run through
2535 const char **file_names
;
2537 /* The file names from the line table after being run through
2538 gdb_realpath. These are computed lazily. */
2539 const char **real_names
;
2542 /* When using the index (and thus not using psymtabs), each CU has an
2543 object of this type. This is used to hold information needed by
2544 the various "quick" methods. */
2545 struct dwarf2_per_cu_quick_data
2547 /* The file table. This can be NULL if there was no file table
2548 or it's currently not read in.
2549 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2550 struct quick_file_names
*file_names
;
2552 /* The corresponding symbol table. This is NULL if symbols for this
2553 CU have not yet been read. */
2554 struct compunit_symtab
*compunit_symtab
;
2556 /* A temporary mark bit used when iterating over all CUs in
2557 expand_symtabs_matching. */
2558 unsigned int mark
: 1;
2560 /* True if we've tried to read the file table and found there isn't one.
2561 There will be no point in trying to read it again next time. */
2562 unsigned int no_file_data
: 1;
2565 /* Utility hash function for a stmt_list_hash. */
2568 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2572 if (stmt_list_hash
->dwo_unit
!= NULL
)
2573 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2574 v
+= stmt_list_hash
->line_offset
.sect_off
;
2578 /* Utility equality function for a stmt_list_hash. */
2581 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2582 const struct stmt_list_hash
*rhs
)
2584 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2586 if (lhs
->dwo_unit
!= NULL
2587 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2590 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2593 /* Hash function for a quick_file_names. */
2596 hash_file_name_entry (const void *e
)
2598 const struct quick_file_names
*file_data
= e
;
2600 return hash_stmt_list_entry (&file_data
->hash
);
2603 /* Equality function for a quick_file_names. */
2606 eq_file_name_entry (const void *a
, const void *b
)
2608 const struct quick_file_names
*ea
= a
;
2609 const struct quick_file_names
*eb
= b
;
2611 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2614 /* Delete function for a quick_file_names. */
2617 delete_file_name_entry (void *e
)
2619 struct quick_file_names
*file_data
= e
;
2622 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2624 xfree ((void*) file_data
->file_names
[i
]);
2625 if (file_data
->real_names
)
2626 xfree ((void*) file_data
->real_names
[i
]);
2629 /* The space for the struct itself lives on objfile_obstack,
2630 so we don't free it here. */
2633 /* Create a quick_file_names hash table. */
2636 create_quick_file_names_table (unsigned int nr_initial_entries
)
2638 return htab_create_alloc (nr_initial_entries
,
2639 hash_file_name_entry
, eq_file_name_entry
,
2640 delete_file_name_entry
, xcalloc
, xfree
);
2643 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2644 have to be created afterwards. You should call age_cached_comp_units after
2645 processing PER_CU->CU. dw2_setup must have been already called. */
2648 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2650 if (per_cu
->is_debug_types
)
2651 load_full_type_unit (per_cu
);
2653 load_full_comp_unit (per_cu
, language_minimal
);
2655 gdb_assert (per_cu
->cu
!= NULL
);
2657 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2660 /* Read in the symbols for PER_CU. */
2663 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2665 struct cleanup
*back_to
;
2667 /* Skip type_unit_groups, reading the type units they contain
2668 is handled elsewhere. */
2669 if (IS_TYPE_UNIT_GROUP (per_cu
))
2672 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2674 if (dwarf2_per_objfile
->using_index
2675 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2676 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2678 queue_comp_unit (per_cu
, language_minimal
);
2681 /* If we just loaded a CU from a DWO, and we're working with an index
2682 that may badly handle TUs, load all the TUs in that DWO as well.
2683 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2684 if (!per_cu
->is_debug_types
2685 && per_cu
->cu
->dwo_unit
!= NULL
2686 && dwarf2_per_objfile
->index_table
!= NULL
2687 && dwarf2_per_objfile
->index_table
->version
<= 7
2688 /* DWP files aren't supported yet. */
2689 && get_dwp_file () == NULL
)
2690 queue_and_load_all_dwo_tus (per_cu
);
2695 /* Age the cache, releasing compilation units that have not
2696 been used recently. */
2697 age_cached_comp_units ();
2699 do_cleanups (back_to
);
2702 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2703 the objfile from which this CU came. Returns the resulting symbol
2706 static struct compunit_symtab
*
2707 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2709 gdb_assert (dwarf2_per_objfile
->using_index
);
2710 if (!per_cu
->v
.quick
->compunit_symtab
)
2712 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2713 increment_reading_symtab ();
2714 dw2_do_instantiate_symtab (per_cu
);
2715 process_cu_includes ();
2716 do_cleanups (back_to
);
2719 return per_cu
->v
.quick
->compunit_symtab
;
2722 /* Return the CU/TU given its index.
2724 This is intended for loops like:
2726 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2727 + dwarf2_per_objfile->n_type_units); ++i)
2729 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
2735 static struct dwarf2_per_cu_data
*
2736 dw2_get_cutu (int index
)
2738 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2740 index
-= dwarf2_per_objfile
->n_comp_units
;
2741 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2742 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2745 return dwarf2_per_objfile
->all_comp_units
[index
];
2748 /* Return the CU given its index.
2749 This differs from dw2_get_cutu in that it's for when you know INDEX
2752 static struct dwarf2_per_cu_data
*
2753 dw2_get_cu (int index
)
2755 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
2757 return dwarf2_per_objfile
->all_comp_units
[index
];
2760 /* A helper for create_cus_from_index that handles a given list of
2764 create_cus_from_index_list (struct objfile
*objfile
,
2765 const gdb_byte
*cu_list
, offset_type n_elements
,
2766 struct dwarf2_section_info
*section
,
2772 for (i
= 0; i
< n_elements
; i
+= 2)
2774 struct dwarf2_per_cu_data
*the_cu
;
2775 ULONGEST offset
, length
;
2777 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2778 offset
= extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2779 length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2782 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2783 struct dwarf2_per_cu_data
);
2784 the_cu
->offset
.sect_off
= offset
;
2785 the_cu
->length
= length
;
2786 the_cu
->objfile
= objfile
;
2787 the_cu
->section
= section
;
2788 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2789 struct dwarf2_per_cu_quick_data
);
2790 the_cu
->is_dwz
= is_dwz
;
2791 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2795 /* Read the CU list from the mapped index, and use it to create all
2796 the CU objects for this objfile. */
2799 create_cus_from_index (struct objfile
*objfile
,
2800 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2801 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2803 struct dwz_file
*dwz
;
2805 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2806 dwarf2_per_objfile
->all_comp_units
2807 = obstack_alloc (&objfile
->objfile_obstack
,
2808 dwarf2_per_objfile
->n_comp_units
2809 * sizeof (struct dwarf2_per_cu_data
*));
2811 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2812 &dwarf2_per_objfile
->info
, 0, 0);
2814 if (dwz_elements
== 0)
2817 dwz
= dwarf2_get_dwz_file ();
2818 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
2819 cu_list_elements
/ 2);
2822 /* Create the signatured type hash table from the index. */
2825 create_signatured_type_table_from_index (struct objfile
*objfile
,
2826 struct dwarf2_section_info
*section
,
2827 const gdb_byte
*bytes
,
2828 offset_type elements
)
2831 htab_t sig_types_hash
;
2833 dwarf2_per_objfile
->n_type_units
2834 = dwarf2_per_objfile
->n_allocated_type_units
2836 dwarf2_per_objfile
->all_type_units
2837 = xmalloc (dwarf2_per_objfile
->n_type_units
2838 * sizeof (struct signatured_type
*));
2840 sig_types_hash
= allocate_signatured_type_table (objfile
);
2842 for (i
= 0; i
< elements
; i
+= 3)
2844 struct signatured_type
*sig_type
;
2845 ULONGEST offset
, type_offset_in_tu
, signature
;
2848 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2849 offset
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2850 type_offset_in_tu
= extract_unsigned_integer (bytes
+ 8, 8,
2852 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2855 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2856 struct signatured_type
);
2857 sig_type
->signature
= signature
;
2858 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2859 sig_type
->per_cu
.is_debug_types
= 1;
2860 sig_type
->per_cu
.section
= section
;
2861 sig_type
->per_cu
.offset
.sect_off
= offset
;
2862 sig_type
->per_cu
.objfile
= objfile
;
2863 sig_type
->per_cu
.v
.quick
2864 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2865 struct dwarf2_per_cu_quick_data
);
2867 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2870 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2873 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2876 /* Read the address map data from the mapped index, and use it to
2877 populate the objfile's psymtabs_addrmap. */
2880 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2882 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2883 const gdb_byte
*iter
, *end
;
2884 struct obstack temp_obstack
;
2885 struct addrmap
*mutable_map
;
2886 struct cleanup
*cleanup
;
2889 obstack_init (&temp_obstack
);
2890 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2891 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2893 iter
= index
->address_table
;
2894 end
= iter
+ index
->address_table_size
;
2896 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2900 ULONGEST hi
, lo
, cu_index
;
2901 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2903 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2905 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2910 complaint (&symfile_complaints
,
2911 _(".gdb_index address table has invalid range (%s - %s)"),
2912 hex_string (lo
), hex_string (hi
));
2916 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
2918 complaint (&symfile_complaints
,
2919 _(".gdb_index address table has invalid CU number %u"),
2920 (unsigned) cu_index
);
2924 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
2925 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
2926 addrmap_set_empty (mutable_map
, lo
, hi
- 1, dw2_get_cutu (cu_index
));
2929 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2930 &objfile
->objfile_obstack
);
2931 do_cleanups (cleanup
);
2934 /* The hash function for strings in the mapped index. This is the same as
2935 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2936 implementation. This is necessary because the hash function is tied to the
2937 format of the mapped index file. The hash values do not have to match with
2940 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2943 mapped_index_string_hash (int index_version
, const void *p
)
2945 const unsigned char *str
= (const unsigned char *) p
;
2949 while ((c
= *str
++) != 0)
2951 if (index_version
>= 5)
2953 r
= r
* 67 + c
- 113;
2959 /* Find a slot in the mapped index INDEX for the object named NAME.
2960 If NAME is found, set *VEC_OUT to point to the CU vector in the
2961 constant pool and return 1. If NAME cannot be found, return 0. */
2964 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2965 offset_type
**vec_out
)
2967 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2969 offset_type slot
, step
;
2970 int (*cmp
) (const char *, const char *);
2972 if (current_language
->la_language
== language_cplus
2973 || current_language
->la_language
== language_java
2974 || current_language
->la_language
== language_fortran
)
2976 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2979 if (strchr (name
, '(') != NULL
)
2981 char *without_params
= cp_remove_params (name
);
2983 if (without_params
!= NULL
)
2985 make_cleanup (xfree
, without_params
);
2986 name
= without_params
;
2991 /* Index version 4 did not support case insensitive searches. But the
2992 indices for case insensitive languages are built in lowercase, therefore
2993 simulate our NAME being searched is also lowercased. */
2994 hash
= mapped_index_string_hash ((index
->version
== 4
2995 && case_sensitivity
== case_sensitive_off
2996 ? 5 : index
->version
),
2999 slot
= hash
& (index
->symbol_table_slots
- 1);
3000 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
3001 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3005 /* Convert a slot number to an offset into the table. */
3006 offset_type i
= 2 * slot
;
3008 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
3010 do_cleanups (back_to
);
3014 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
3015 if (!cmp (name
, str
))
3017 *vec_out
= (offset_type
*) (index
->constant_pool
3018 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
3019 do_cleanups (back_to
);
3023 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
3027 /* A helper function that reads the .gdb_index from SECTION and fills
3028 in MAP. FILENAME is the name of the file containing the section;
3029 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3030 ok to use deprecated sections.
3032 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3033 out parameters that are filled in with information about the CU and
3034 TU lists in the section.
3036 Returns 1 if all went well, 0 otherwise. */
3039 read_index_from_section (struct objfile
*objfile
,
3040 const char *filename
,
3042 struct dwarf2_section_info
*section
,
3043 struct mapped_index
*map
,
3044 const gdb_byte
**cu_list
,
3045 offset_type
*cu_list_elements
,
3046 const gdb_byte
**types_list
,
3047 offset_type
*types_list_elements
)
3049 const gdb_byte
*addr
;
3050 offset_type version
;
3051 offset_type
*metadata
;
3054 if (dwarf2_section_empty_p (section
))
3057 /* Older elfutils strip versions could keep the section in the main
3058 executable while splitting it for the separate debug info file. */
3059 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3062 dwarf2_read_section (objfile
, section
);
3064 addr
= section
->buffer
;
3065 /* Version check. */
3066 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3067 /* Versions earlier than 3 emitted every copy of a psymbol. This
3068 causes the index to behave very poorly for certain requests. Version 3
3069 contained incomplete addrmap. So, it seems better to just ignore such
3073 static int warning_printed
= 0;
3074 if (!warning_printed
)
3076 warning (_("Skipping obsolete .gdb_index section in %s."),
3078 warning_printed
= 1;
3082 /* Index version 4 uses a different hash function than index version
3085 Versions earlier than 6 did not emit psymbols for inlined
3086 functions. Using these files will cause GDB not to be able to
3087 set breakpoints on inlined functions by name, so we ignore these
3088 indices unless the user has done
3089 "set use-deprecated-index-sections on". */
3090 if (version
< 6 && !deprecated_ok
)
3092 static int warning_printed
= 0;
3093 if (!warning_printed
)
3096 Skipping deprecated .gdb_index section in %s.\n\
3097 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3098 to use the section anyway."),
3100 warning_printed
= 1;
3104 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3105 of the TU (for symbols coming from TUs),
3106 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3107 Plus gold-generated indices can have duplicate entries for global symbols,
3108 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3109 These are just performance bugs, and we can't distinguish gdb-generated
3110 indices from gold-generated ones, so issue no warning here. */
3112 /* Indexes with higher version than the one supported by GDB may be no
3113 longer backward compatible. */
3117 map
->version
= version
;
3118 map
->total_size
= section
->size
;
3120 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3123 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3124 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3128 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3129 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3130 - MAYBE_SWAP (metadata
[i
]))
3134 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3135 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3136 - MAYBE_SWAP (metadata
[i
]));
3139 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3140 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3141 - MAYBE_SWAP (metadata
[i
]))
3142 / (2 * sizeof (offset_type
)));
3145 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3151 /* Read the index file. If everything went ok, initialize the "quick"
3152 elements of all the CUs and return 1. Otherwise, return 0. */
3155 dwarf2_read_index (struct objfile
*objfile
)
3157 struct mapped_index local_map
, *map
;
3158 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3159 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3160 struct dwz_file
*dwz
;
3162 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3163 use_deprecated_index_sections
,
3164 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3165 &cu_list
, &cu_list_elements
,
3166 &types_list
, &types_list_elements
))
3169 /* Don't use the index if it's empty. */
3170 if (local_map
.symbol_table_slots
== 0)
3173 /* If there is a .dwz file, read it so we can get its CU list as
3175 dwz
= dwarf2_get_dwz_file ();
3178 struct mapped_index dwz_map
;
3179 const gdb_byte
*dwz_types_ignore
;
3180 offset_type dwz_types_elements_ignore
;
3182 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3184 &dwz
->gdb_index
, &dwz_map
,
3185 &dwz_list
, &dwz_list_elements
,
3187 &dwz_types_elements_ignore
))
3189 warning (_("could not read '.gdb_index' section from %s; skipping"),
3190 bfd_get_filename (dwz
->dwz_bfd
));
3195 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3198 if (types_list_elements
)
3200 struct dwarf2_section_info
*section
;
3202 /* We can only handle a single .debug_types when we have an
3204 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3207 section
= VEC_index (dwarf2_section_info_def
,
3208 dwarf2_per_objfile
->types
, 0);
3210 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3211 types_list_elements
);
3214 create_addrmap_from_index (objfile
, &local_map
);
3216 map
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct mapped_index
));
3219 dwarf2_per_objfile
->index_table
= map
;
3220 dwarf2_per_objfile
->using_index
= 1;
3221 dwarf2_per_objfile
->quick_file_names_table
=
3222 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3227 /* A helper for the "quick" functions which sets the global
3228 dwarf2_per_objfile according to OBJFILE. */
3231 dw2_setup (struct objfile
*objfile
)
3233 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
3234 gdb_assert (dwarf2_per_objfile
);
3237 /* die_reader_func for dw2_get_file_names. */
3240 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3241 const gdb_byte
*info_ptr
,
3242 struct die_info
*comp_unit_die
,
3246 struct dwarf2_cu
*cu
= reader
->cu
;
3247 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3248 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3249 struct dwarf2_per_cu_data
*lh_cu
;
3250 struct line_header
*lh
;
3251 struct attribute
*attr
;
3253 const char *name
, *comp_dir
;
3255 struct quick_file_names
*qfn
;
3256 unsigned int line_offset
;
3258 gdb_assert (! this_cu
->is_debug_types
);
3260 /* Our callers never want to match partial units -- instead they
3261 will match the enclosing full CU. */
3262 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3264 this_cu
->v
.quick
->no_file_data
= 1;
3273 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3276 struct quick_file_names find_entry
;
3278 line_offset
= DW_UNSND (attr
);
3280 /* We may have already read in this line header (TU line header sharing).
3281 If we have we're done. */
3282 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3283 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
3284 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3285 &find_entry
, INSERT
);
3288 lh_cu
->v
.quick
->file_names
= *slot
;
3292 lh
= dwarf_decode_line_header (line_offset
, cu
);
3296 lh_cu
->v
.quick
->no_file_data
= 1;
3300 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
3301 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3302 qfn
->hash
.line_offset
.sect_off
= line_offset
;
3303 gdb_assert (slot
!= NULL
);
3306 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
3308 qfn
->num_file_names
= lh
->num_file_names
;
3309 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
3310 lh
->num_file_names
* sizeof (char *));
3311 for (i
= 0; i
< lh
->num_file_names
; ++i
)
3312 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
3313 qfn
->real_names
= NULL
;
3315 free_line_header (lh
);
3317 lh_cu
->v
.quick
->file_names
= qfn
;
3320 /* A helper for the "quick" functions which attempts to read the line
3321 table for THIS_CU. */
3323 static struct quick_file_names
*
3324 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3326 /* This should never be called for TUs. */
3327 gdb_assert (! this_cu
->is_debug_types
);
3328 /* Nor type unit groups. */
3329 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3331 if (this_cu
->v
.quick
->file_names
!= NULL
)
3332 return this_cu
->v
.quick
->file_names
;
3333 /* If we know there is no line data, no point in looking again. */
3334 if (this_cu
->v
.quick
->no_file_data
)
3337 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3339 if (this_cu
->v
.quick
->no_file_data
)
3341 return this_cu
->v
.quick
->file_names
;
3344 /* A helper for the "quick" functions which computes and caches the
3345 real path for a given file name from the line table. */
3348 dw2_get_real_path (struct objfile
*objfile
,
3349 struct quick_file_names
*qfn
, int index
)
3351 if (qfn
->real_names
== NULL
)
3352 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3353 qfn
->num_file_names
, const char *);
3355 if (qfn
->real_names
[index
] == NULL
)
3356 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
3358 return qfn
->real_names
[index
];
3361 static struct symtab
*
3362 dw2_find_last_source_symtab (struct objfile
*objfile
)
3364 struct compunit_symtab
*cust
;
3367 dw2_setup (objfile
);
3368 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3369 cust
= dw2_instantiate_symtab (dw2_get_cutu (index
));
3372 return compunit_primary_filetab (cust
);
3375 /* Traversal function for dw2_forget_cached_source_info. */
3378 dw2_free_cached_file_names (void **slot
, void *info
)
3380 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3382 if (file_data
->real_names
)
3386 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3388 xfree ((void*) file_data
->real_names
[i
]);
3389 file_data
->real_names
[i
] = NULL
;
3397 dw2_forget_cached_source_info (struct objfile
*objfile
)
3399 dw2_setup (objfile
);
3401 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3402 dw2_free_cached_file_names
, NULL
);
3405 /* Helper function for dw2_map_symtabs_matching_filename that expands
3406 the symtabs and calls the iterator. */
3409 dw2_map_expand_apply (struct objfile
*objfile
,
3410 struct dwarf2_per_cu_data
*per_cu
,
3411 const char *name
, const char *real_path
,
3412 int (*callback
) (struct symtab
*, void *),
3415 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3417 /* Don't visit already-expanded CUs. */
3418 if (per_cu
->v
.quick
->compunit_symtab
)
3421 /* This may expand more than one symtab, and we want to iterate over
3423 dw2_instantiate_symtab (per_cu
);
3425 return iterate_over_some_symtabs (name
, real_path
, callback
, data
,
3426 objfile
->compunit_symtabs
, last_made
);
3429 /* Implementation of the map_symtabs_matching_filename method. */
3432 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3433 const char *real_path
,
3434 int (*callback
) (struct symtab
*, void *),
3438 const char *name_basename
= lbasename (name
);
3440 dw2_setup (objfile
);
3442 /* The rule is CUs specify all the files, including those used by
3443 any TU, so there's no need to scan TUs here. */
3445 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3448 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3449 struct quick_file_names
*file_data
;
3451 /* We only need to look at symtabs not already expanded. */
3452 if (per_cu
->v
.quick
->compunit_symtab
)
3455 file_data
= dw2_get_file_names (per_cu
);
3456 if (file_data
== NULL
)
3459 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3461 const char *this_name
= file_data
->file_names
[j
];
3462 const char *this_real_name
;
3464 if (compare_filenames_for_search (this_name
, name
))
3466 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3472 /* Before we invoke realpath, which can get expensive when many
3473 files are involved, do a quick comparison of the basenames. */
3474 if (! basenames_may_differ
3475 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3478 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3479 if (compare_filenames_for_search (this_real_name
, name
))
3481 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3487 if (real_path
!= NULL
)
3489 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3490 gdb_assert (IS_ABSOLUTE_PATH (name
));
3491 if (this_real_name
!= NULL
3492 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3494 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3506 /* Struct used to manage iterating over all CUs looking for a symbol. */
3508 struct dw2_symtab_iterator
3510 /* The internalized form of .gdb_index. */
3511 struct mapped_index
*index
;
3512 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3513 int want_specific_block
;
3514 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3515 Unused if !WANT_SPECIFIC_BLOCK. */
3517 /* The kind of symbol we're looking for. */
3519 /* The list of CUs from the index entry of the symbol,
3520 or NULL if not found. */
3522 /* The next element in VEC to look at. */
3524 /* The number of elements in VEC, or zero if there is no match. */
3526 /* Have we seen a global version of the symbol?
3527 If so we can ignore all further global instances.
3528 This is to work around gold/15646, inefficient gold-generated
3533 /* Initialize the index symtab iterator ITER.
3534 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3535 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3538 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3539 struct mapped_index
*index
,
3540 int want_specific_block
,
3545 iter
->index
= index
;
3546 iter
->want_specific_block
= want_specific_block
;
3547 iter
->block_index
= block_index
;
3548 iter
->domain
= domain
;
3550 iter
->global_seen
= 0;
3552 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3553 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3561 /* Return the next matching CU or NULL if there are no more. */
3563 static struct dwarf2_per_cu_data
*
3564 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3566 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3568 offset_type cu_index_and_attrs
=
3569 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3570 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3571 struct dwarf2_per_cu_data
*per_cu
;
3572 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3573 /* This value is only valid for index versions >= 7. */
3574 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3575 gdb_index_symbol_kind symbol_kind
=
3576 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3577 /* Only check the symbol attributes if they're present.
3578 Indices prior to version 7 don't record them,
3579 and indices >= 7 may elide them for certain symbols
3580 (gold does this). */
3582 (iter
->index
->version
>= 7
3583 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3585 /* Don't crash on bad data. */
3586 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3587 + dwarf2_per_objfile
->n_type_units
))
3589 complaint (&symfile_complaints
,
3590 _(".gdb_index entry has bad CU index"
3592 objfile_name (dwarf2_per_objfile
->objfile
));
3596 per_cu
= dw2_get_cutu (cu_index
);
3598 /* Skip if already read in. */
3599 if (per_cu
->v
.quick
->compunit_symtab
)
3602 /* Check static vs global. */
3605 if (iter
->want_specific_block
3606 && want_static
!= is_static
)
3608 /* Work around gold/15646. */
3609 if (!is_static
&& iter
->global_seen
)
3612 iter
->global_seen
= 1;
3615 /* Only check the symbol's kind if it has one. */
3618 switch (iter
->domain
)
3621 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3622 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3623 /* Some types are also in VAR_DOMAIN. */
3624 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3628 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3632 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3647 static struct compunit_symtab
*
3648 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3649 const char *name
, domain_enum domain
)
3651 struct compunit_symtab
*stab_best
= NULL
;
3652 struct mapped_index
*index
;
3654 dw2_setup (objfile
);
3656 index
= dwarf2_per_objfile
->index_table
;
3658 /* index is NULL if OBJF_READNOW. */
3661 struct dw2_symtab_iterator iter
;
3662 struct dwarf2_per_cu_data
*per_cu
;
3664 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3666 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3668 struct symbol
*sym
= NULL
;
3669 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3670 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3671 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3673 /* Some caution must be observed with overloaded functions
3674 and methods, since the index will not contain any overload
3675 information (but NAME might contain it). */
3676 sym
= block_lookup_symbol (block
, name
, domain
);
3678 if (sym
&& strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
3680 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
3686 /* Keep looking through other CUs. */
3694 dw2_print_stats (struct objfile
*objfile
)
3696 int i
, total
, count
;
3698 dw2_setup (objfile
);
3699 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3701 for (i
= 0; i
< total
; ++i
)
3703 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3705 if (!per_cu
->v
.quick
->compunit_symtab
)
3708 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3709 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3712 /* This dumps minimal information about the index.
3713 It is called via "mt print objfiles".
3714 One use is to verify .gdb_index has been loaded by the
3715 gdb.dwarf2/gdb-index.exp testcase. */
3718 dw2_dump (struct objfile
*objfile
)
3720 dw2_setup (objfile
);
3721 gdb_assert (dwarf2_per_objfile
->using_index
);
3722 printf_filtered (".gdb_index:");
3723 if (dwarf2_per_objfile
->index_table
!= NULL
)
3725 printf_filtered (" version %d\n",
3726 dwarf2_per_objfile
->index_table
->version
);
3729 printf_filtered (" faked for \"readnow\"\n");
3730 printf_filtered ("\n");
3734 dw2_relocate (struct objfile
*objfile
,
3735 const struct section_offsets
*new_offsets
,
3736 const struct section_offsets
*delta
)
3738 /* There's nothing to relocate here. */
3742 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3743 const char *func_name
)
3745 struct mapped_index
*index
;
3747 dw2_setup (objfile
);
3749 index
= dwarf2_per_objfile
->index_table
;
3751 /* index is NULL if OBJF_READNOW. */
3754 struct dw2_symtab_iterator iter
;
3755 struct dwarf2_per_cu_data
*per_cu
;
3757 /* Note: It doesn't matter what we pass for block_index here. */
3758 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3761 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3762 dw2_instantiate_symtab (per_cu
);
3767 dw2_expand_all_symtabs (struct objfile
*objfile
)
3771 dw2_setup (objfile
);
3773 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3774 + dwarf2_per_objfile
->n_type_units
); ++i
)
3776 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3778 dw2_instantiate_symtab (per_cu
);
3783 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3784 const char *fullname
)
3788 dw2_setup (objfile
);
3790 /* We don't need to consider type units here.
3791 This is only called for examining code, e.g. expand_line_sal.
3792 There can be an order of magnitude (or more) more type units
3793 than comp units, and we avoid them if we can. */
3795 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3798 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3799 struct quick_file_names
*file_data
;
3801 /* We only need to look at symtabs not already expanded. */
3802 if (per_cu
->v
.quick
->compunit_symtab
)
3805 file_data
= dw2_get_file_names (per_cu
);
3806 if (file_data
== NULL
)
3809 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3811 const char *this_fullname
= file_data
->file_names
[j
];
3813 if (filename_cmp (this_fullname
, fullname
) == 0)
3815 dw2_instantiate_symtab (per_cu
);
3823 dw2_map_matching_symbols (struct objfile
*objfile
,
3824 const char * name
, domain_enum domain
,
3826 int (*callback
) (struct block
*,
3827 struct symbol
*, void *),
3828 void *data
, symbol_compare_ftype
*match
,
3829 symbol_compare_ftype
*ordered_compare
)
3831 /* Currently unimplemented; used for Ada. The function can be called if the
3832 current language is Ada for a non-Ada objfile using GNU index. As Ada
3833 does not look for non-Ada symbols this function should just return. */
3837 dw2_expand_symtabs_matching
3838 (struct objfile
*objfile
,
3839 expand_symtabs_file_matcher_ftype
*file_matcher
,
3840 expand_symtabs_symbol_matcher_ftype
*symbol_matcher
,
3841 expand_symtabs_exp_notify_ftype
*expansion_notify
,
3842 enum search_domain kind
,
3847 struct mapped_index
*index
;
3849 dw2_setup (objfile
);
3851 /* index_table is NULL if OBJF_READNOW. */
3852 if (!dwarf2_per_objfile
->index_table
)
3854 index
= dwarf2_per_objfile
->index_table
;
3856 if (file_matcher
!= NULL
)
3858 struct cleanup
*cleanup
;
3859 htab_t visited_found
, visited_not_found
;
3861 visited_found
= htab_create_alloc (10,
3862 htab_hash_pointer
, htab_eq_pointer
,
3863 NULL
, xcalloc
, xfree
);
3864 cleanup
= make_cleanup_htab_delete (visited_found
);
3865 visited_not_found
= htab_create_alloc (10,
3866 htab_hash_pointer
, htab_eq_pointer
,
3867 NULL
, xcalloc
, xfree
);
3868 make_cleanup_htab_delete (visited_not_found
);
3870 /* The rule is CUs specify all the files, including those used by
3871 any TU, so there's no need to scan TUs here. */
3873 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3876 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3877 struct quick_file_names
*file_data
;
3882 per_cu
->v
.quick
->mark
= 0;
3884 /* We only need to look at symtabs not already expanded. */
3885 if (per_cu
->v
.quick
->compunit_symtab
)
3888 file_data
= dw2_get_file_names (per_cu
);
3889 if (file_data
== NULL
)
3892 if (htab_find (visited_not_found
, file_data
) != NULL
)
3894 else if (htab_find (visited_found
, file_data
) != NULL
)
3896 per_cu
->v
.quick
->mark
= 1;
3900 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3902 const char *this_real_name
;
3904 if (file_matcher (file_data
->file_names
[j
], data
, 0))
3906 per_cu
->v
.quick
->mark
= 1;
3910 /* Before we invoke realpath, which can get expensive when many
3911 files are involved, do a quick comparison of the basenames. */
3912 if (!basenames_may_differ
3913 && !file_matcher (lbasename (file_data
->file_names
[j
]),
3917 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3918 if (file_matcher (this_real_name
, data
, 0))
3920 per_cu
->v
.quick
->mark
= 1;
3925 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3927 : visited_not_found
,
3932 do_cleanups (cleanup
);
3935 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3937 offset_type idx
= 2 * iter
;
3939 offset_type
*vec
, vec_len
, vec_idx
;
3940 int global_seen
= 0;
3944 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3947 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3949 if (! (*symbol_matcher
) (name
, data
))
3952 /* The name was matched, now expand corresponding CUs that were
3954 vec
= (offset_type
*) (index
->constant_pool
3955 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3956 vec_len
= MAYBE_SWAP (vec
[0]);
3957 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3959 struct dwarf2_per_cu_data
*per_cu
;
3960 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3961 /* This value is only valid for index versions >= 7. */
3962 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3963 gdb_index_symbol_kind symbol_kind
=
3964 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3965 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3966 /* Only check the symbol attributes if they're present.
3967 Indices prior to version 7 don't record them,
3968 and indices >= 7 may elide them for certain symbols
3969 (gold does this). */
3971 (index
->version
>= 7
3972 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3974 /* Work around gold/15646. */
3977 if (!is_static
&& global_seen
)
3983 /* Only check the symbol's kind if it has one. */
3988 case VARIABLES_DOMAIN
:
3989 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
3992 case FUNCTIONS_DOMAIN
:
3993 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
3997 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4005 /* Don't crash on bad data. */
4006 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
4007 + dwarf2_per_objfile
->n_type_units
))
4009 complaint (&symfile_complaints
,
4010 _(".gdb_index entry has bad CU index"
4011 " [in module %s]"), objfile_name (objfile
));
4015 per_cu
= dw2_get_cutu (cu_index
);
4016 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4018 int symtab_was_null
=
4019 (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4021 dw2_instantiate_symtab (per_cu
);
4023 if (expansion_notify
!= NULL
4025 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4027 expansion_notify (per_cu
->v
.quick
->compunit_symtab
,
4035 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4038 static struct compunit_symtab
*
4039 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4044 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4045 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4048 if (cust
->includes
== NULL
)
4051 for (i
= 0; cust
->includes
[i
]; ++i
)
4053 struct compunit_symtab
*s
= cust
->includes
[i
];
4055 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4063 static struct compunit_symtab
*
4064 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4065 struct bound_minimal_symbol msymbol
,
4067 struct obj_section
*section
,
4070 struct dwarf2_per_cu_data
*data
;
4071 struct compunit_symtab
*result
;
4073 dw2_setup (objfile
);
4075 if (!objfile
->psymtabs_addrmap
)
4078 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
4082 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4083 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4084 paddress (get_objfile_arch (objfile
), pc
));
4087 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
4089 gdb_assert (result
!= NULL
);
4094 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4095 void *data
, int need_fullname
)
4098 struct cleanup
*cleanup
;
4099 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
4100 NULL
, xcalloc
, xfree
);
4102 cleanup
= make_cleanup_htab_delete (visited
);
4103 dw2_setup (objfile
);
4105 /* The rule is CUs specify all the files, including those used by
4106 any TU, so there's no need to scan TUs here.
4107 We can ignore file names coming from already-expanded CUs. */
4109 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4111 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4113 if (per_cu
->v
.quick
->compunit_symtab
)
4115 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
4118 *slot
= per_cu
->v
.quick
->file_names
;
4122 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4125 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4126 struct quick_file_names
*file_data
;
4129 /* We only need to look at symtabs not already expanded. */
4130 if (per_cu
->v
.quick
->compunit_symtab
)
4133 file_data
= dw2_get_file_names (per_cu
);
4134 if (file_data
== NULL
)
4137 slot
= htab_find_slot (visited
, file_data
, INSERT
);
4140 /* Already visited. */
4145 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4147 const char *this_real_name
;
4150 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4152 this_real_name
= NULL
;
4153 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
4157 do_cleanups (cleanup
);
4161 dw2_has_symbols (struct objfile
*objfile
)
4166 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4169 dw2_find_last_source_symtab
,
4170 dw2_forget_cached_source_info
,
4171 dw2_map_symtabs_matching_filename
,
4176 dw2_expand_symtabs_for_function
,
4177 dw2_expand_all_symtabs
,
4178 dw2_expand_symtabs_with_fullname
,
4179 dw2_map_matching_symbols
,
4180 dw2_expand_symtabs_matching
,
4181 dw2_find_pc_sect_compunit_symtab
,
4182 dw2_map_symbol_filenames
4185 /* Initialize for reading DWARF for this objfile. Return 0 if this
4186 file will use psymtabs, or 1 if using the GNU index. */
4189 dwarf2_initialize_objfile (struct objfile
*objfile
)
4191 /* If we're about to read full symbols, don't bother with the
4192 indices. In this case we also don't care if some other debug
4193 format is making psymtabs, because they are all about to be
4195 if ((objfile
->flags
& OBJF_READNOW
))
4199 dwarf2_per_objfile
->using_index
= 1;
4200 create_all_comp_units (objfile
);
4201 create_all_type_units (objfile
);
4202 dwarf2_per_objfile
->quick_file_names_table
=
4203 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
4205 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4206 + dwarf2_per_objfile
->n_type_units
); ++i
)
4208 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4210 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4211 struct dwarf2_per_cu_quick_data
);
4214 /* Return 1 so that gdb sees the "quick" functions. However,
4215 these functions will be no-ops because we will have expanded
4220 if (dwarf2_read_index (objfile
))
4228 /* Build a partial symbol table. */
4231 dwarf2_build_psymtabs (struct objfile
*objfile
)
4234 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
4236 init_psymbol_list (objfile
, 1024);
4241 /* This isn't really ideal: all the data we allocate on the
4242 objfile's obstack is still uselessly kept around. However,
4243 freeing it seems unsafe. */
4244 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
4246 dwarf2_build_psymtabs_hard (objfile
);
4247 discard_cleanups (cleanups
);
4249 CATCH (except
, RETURN_MASK_ERROR
)
4251 exception_print (gdb_stderr
, except
);
4256 /* Return the total length of the CU described by HEADER. */
4259 get_cu_length (const struct comp_unit_head
*header
)
4261 return header
->initial_length_size
+ header
->length
;
4264 /* Return TRUE if OFFSET is within CU_HEADER. */
4267 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
4269 sect_offset bottom
= { cu_header
->offset
.sect_off
};
4270 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
4272 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
4275 /* Find the base address of the compilation unit for range lists and
4276 location lists. It will normally be specified by DW_AT_low_pc.
4277 In DWARF-3 draft 4, the base address could be overridden by
4278 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4279 compilation units with discontinuous ranges. */
4282 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4284 struct attribute
*attr
;
4287 cu
->base_address
= 0;
4289 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4292 cu
->base_address
= attr_value_as_address (attr
);
4297 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4300 cu
->base_address
= attr_value_as_address (attr
);
4306 /* Read in the comp unit header information from the debug_info at info_ptr.
4307 NOTE: This leaves members offset, first_die_offset to be filled in
4310 static const gdb_byte
*
4311 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4312 const gdb_byte
*info_ptr
, bfd
*abfd
)
4315 unsigned int bytes_read
;
4317 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4318 cu_header
->initial_length_size
= bytes_read
;
4319 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4320 info_ptr
+= bytes_read
;
4321 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4323 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
4325 info_ptr
+= bytes_read
;
4326 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4328 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4329 if (signed_addr
< 0)
4330 internal_error (__FILE__
, __LINE__
,
4331 _("read_comp_unit_head: dwarf from non elf file"));
4332 cu_header
->signed_addr_p
= signed_addr
;
4337 /* Helper function that returns the proper abbrev section for
4340 static struct dwarf2_section_info
*
4341 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4343 struct dwarf2_section_info
*abbrev
;
4345 if (this_cu
->is_dwz
)
4346 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4348 abbrev
= &dwarf2_per_objfile
->abbrev
;
4353 /* Subroutine of read_and_check_comp_unit_head and
4354 read_and_check_type_unit_head to simplify them.
4355 Perform various error checking on the header. */
4358 error_check_comp_unit_head (struct comp_unit_head
*header
,
4359 struct dwarf2_section_info
*section
,
4360 struct dwarf2_section_info
*abbrev_section
)
4362 bfd
*abfd
= get_section_bfd_owner (section
);
4363 const char *filename
= get_section_file_name (section
);
4365 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
4366 error (_("Dwarf Error: wrong version in compilation unit header "
4367 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
4370 if (header
->abbrev_offset
.sect_off
4371 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4372 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4373 "(offset 0x%lx + 6) [in module %s]"),
4374 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
4377 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4378 avoid potential 32-bit overflow. */
4379 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
4381 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4382 "(offset 0x%lx + 0) [in module %s]"),
4383 (long) header
->length
, (long) header
->offset
.sect_off
,
4387 /* Read in a CU/TU header and perform some basic error checking.
4388 The contents of the header are stored in HEADER.
4389 The result is a pointer to the start of the first DIE. */
4391 static const gdb_byte
*
4392 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4393 struct dwarf2_section_info
*section
,
4394 struct dwarf2_section_info
*abbrev_section
,
4395 const gdb_byte
*info_ptr
,
4396 int is_debug_types_section
)
4398 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4399 bfd
*abfd
= get_section_bfd_owner (section
);
4401 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4403 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4405 /* If we're reading a type unit, skip over the signature and
4406 type_offset fields. */
4407 if (is_debug_types_section
)
4408 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4410 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4412 error_check_comp_unit_head (header
, section
, abbrev_section
);
4417 /* Read in the types comp unit header information from .debug_types entry at
4418 types_ptr. The result is a pointer to one past the end of the header. */
4420 static const gdb_byte
*
4421 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4422 struct dwarf2_section_info
*section
,
4423 struct dwarf2_section_info
*abbrev_section
,
4424 const gdb_byte
*info_ptr
,
4425 ULONGEST
*signature
,
4426 cu_offset
*type_offset_in_tu
)
4428 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4429 bfd
*abfd
= get_section_bfd_owner (section
);
4431 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4433 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4435 /* If we're reading a type unit, skip over the signature and
4436 type_offset fields. */
4437 if (signature
!= NULL
)
4438 *signature
= read_8_bytes (abfd
, info_ptr
);
4440 if (type_offset_in_tu
!= NULL
)
4441 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4442 header
->offset_size
);
4443 info_ptr
+= header
->offset_size
;
4445 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4447 error_check_comp_unit_head (header
, section
, abbrev_section
);
4452 /* Fetch the abbreviation table offset from a comp or type unit header. */
4455 read_abbrev_offset (struct dwarf2_section_info
*section
,
4458 bfd
*abfd
= get_section_bfd_owner (section
);
4459 const gdb_byte
*info_ptr
;
4460 unsigned int length
, initial_length_size
, offset_size
;
4461 sect_offset abbrev_offset
;
4463 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4464 info_ptr
= section
->buffer
+ offset
.sect_off
;
4465 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4466 offset_size
= initial_length_size
== 4 ? 4 : 8;
4467 info_ptr
+= initial_length_size
+ 2 /*version*/;
4468 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4469 return abbrev_offset
;
4472 /* Allocate a new partial symtab for file named NAME and mark this new
4473 partial symtab as being an include of PST. */
4476 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4477 struct objfile
*objfile
)
4479 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4481 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4483 /* It shares objfile->objfile_obstack. */
4484 subpst
->dirname
= pst
->dirname
;
4487 subpst
->section_offsets
= pst
->section_offsets
;
4488 subpst
->textlow
= 0;
4489 subpst
->texthigh
= 0;
4491 subpst
->dependencies
= (struct partial_symtab
**)
4492 obstack_alloc (&objfile
->objfile_obstack
,
4493 sizeof (struct partial_symtab
*));
4494 subpst
->dependencies
[0] = pst
;
4495 subpst
->number_of_dependencies
= 1;
4497 subpst
->globals_offset
= 0;
4498 subpst
->n_global_syms
= 0;
4499 subpst
->statics_offset
= 0;
4500 subpst
->n_static_syms
= 0;
4501 subpst
->compunit_symtab
= NULL
;
4502 subpst
->read_symtab
= pst
->read_symtab
;
4505 /* No private part is necessary for include psymtabs. This property
4506 can be used to differentiate between such include psymtabs and
4507 the regular ones. */
4508 subpst
->read_symtab_private
= NULL
;
4511 /* Read the Line Number Program data and extract the list of files
4512 included by the source file represented by PST. Build an include
4513 partial symtab for each of these included files. */
4516 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4517 struct die_info
*die
,
4518 struct partial_symtab
*pst
)
4520 struct line_header
*lh
= NULL
;
4521 struct attribute
*attr
;
4523 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4525 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4527 return; /* No linetable, so no includes. */
4529 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4530 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
4532 free_line_header (lh
);
4536 hash_signatured_type (const void *item
)
4538 const struct signatured_type
*sig_type
= item
;
4540 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4541 return sig_type
->signature
;
4545 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4547 const struct signatured_type
*lhs
= item_lhs
;
4548 const struct signatured_type
*rhs
= item_rhs
;
4550 return lhs
->signature
== rhs
->signature
;
4553 /* Allocate a hash table for signatured types. */
4556 allocate_signatured_type_table (struct objfile
*objfile
)
4558 return htab_create_alloc_ex (41,
4559 hash_signatured_type
,
4562 &objfile
->objfile_obstack
,
4563 hashtab_obstack_allocate
,
4564 dummy_obstack_deallocate
);
4567 /* A helper function to add a signatured type CU to a table. */
4570 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4572 struct signatured_type
*sigt
= *slot
;
4573 struct signatured_type
***datap
= datum
;
4581 /* Create the hash table of all entries in the .debug_types
4582 (or .debug_types.dwo) section(s).
4583 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4584 otherwise it is NULL.
4586 The result is a pointer to the hash table or NULL if there are no types.
4588 Note: This function processes DWO files only, not DWP files. */
4591 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4592 VEC (dwarf2_section_info_def
) *types
)
4594 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4595 htab_t types_htab
= NULL
;
4597 struct dwarf2_section_info
*section
;
4598 struct dwarf2_section_info
*abbrev_section
;
4600 if (VEC_empty (dwarf2_section_info_def
, types
))
4603 abbrev_section
= (dwo_file
!= NULL
4604 ? &dwo_file
->sections
.abbrev
4605 : &dwarf2_per_objfile
->abbrev
);
4607 if (dwarf2_read_debug
)
4608 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4609 dwo_file
? ".dwo" : "",
4610 get_section_file_name (abbrev_section
));
4613 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4617 const gdb_byte
*info_ptr
, *end_ptr
;
4619 dwarf2_read_section (objfile
, section
);
4620 info_ptr
= section
->buffer
;
4622 if (info_ptr
== NULL
)
4625 /* We can't set abfd until now because the section may be empty or
4626 not present, in which case the bfd is unknown. */
4627 abfd
= get_section_bfd_owner (section
);
4629 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4630 because we don't need to read any dies: the signature is in the
4633 end_ptr
= info_ptr
+ section
->size
;
4634 while (info_ptr
< end_ptr
)
4637 cu_offset type_offset_in_tu
;
4639 struct signatured_type
*sig_type
;
4640 struct dwo_unit
*dwo_tu
;
4642 const gdb_byte
*ptr
= info_ptr
;
4643 struct comp_unit_head header
;
4644 unsigned int length
;
4646 offset
.sect_off
= ptr
- section
->buffer
;
4648 /* We need to read the type's signature in order to build the hash
4649 table, but we don't need anything else just yet. */
4651 ptr
= read_and_check_type_unit_head (&header
, section
,
4652 abbrev_section
, ptr
,
4653 &signature
, &type_offset_in_tu
);
4655 length
= get_cu_length (&header
);
4657 /* Skip dummy type units. */
4658 if (ptr
>= info_ptr
+ length
4659 || peek_abbrev_code (abfd
, ptr
) == 0)
4665 if (types_htab
== NULL
)
4668 types_htab
= allocate_dwo_unit_table (objfile
);
4670 types_htab
= allocate_signatured_type_table (objfile
);
4676 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4678 dwo_tu
->dwo_file
= dwo_file
;
4679 dwo_tu
->signature
= signature
;
4680 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4681 dwo_tu
->section
= section
;
4682 dwo_tu
->offset
= offset
;
4683 dwo_tu
->length
= length
;
4687 /* N.B.: type_offset is not usable if this type uses a DWO file.
4688 The real type_offset is in the DWO file. */
4690 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4691 struct signatured_type
);
4692 sig_type
->signature
= signature
;
4693 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4694 sig_type
->per_cu
.objfile
= objfile
;
4695 sig_type
->per_cu
.is_debug_types
= 1;
4696 sig_type
->per_cu
.section
= section
;
4697 sig_type
->per_cu
.offset
= offset
;
4698 sig_type
->per_cu
.length
= length
;
4701 slot
= htab_find_slot (types_htab
,
4702 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4704 gdb_assert (slot
!= NULL
);
4707 sect_offset dup_offset
;
4711 const struct dwo_unit
*dup_tu
= *slot
;
4713 dup_offset
= dup_tu
->offset
;
4717 const struct signatured_type
*dup_tu
= *slot
;
4719 dup_offset
= dup_tu
->per_cu
.offset
;
4722 complaint (&symfile_complaints
,
4723 _("debug type entry at offset 0x%x is duplicate to"
4724 " the entry at offset 0x%x, signature %s"),
4725 offset
.sect_off
, dup_offset
.sect_off
,
4726 hex_string (signature
));
4728 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4730 if (dwarf2_read_debug
> 1)
4731 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4733 hex_string (signature
));
4742 /* Create the hash table of all entries in the .debug_types section,
4743 and initialize all_type_units.
4744 The result is zero if there is an error (e.g. missing .debug_types section),
4745 otherwise non-zero. */
4748 create_all_type_units (struct objfile
*objfile
)
4751 struct signatured_type
**iter
;
4753 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4754 if (types_htab
== NULL
)
4756 dwarf2_per_objfile
->signatured_types
= NULL
;
4760 dwarf2_per_objfile
->signatured_types
= types_htab
;
4762 dwarf2_per_objfile
->n_type_units
4763 = dwarf2_per_objfile
->n_allocated_type_units
4764 = htab_elements (types_htab
);
4765 dwarf2_per_objfile
->all_type_units
4766 = xmalloc (dwarf2_per_objfile
->n_type_units
4767 * sizeof (struct signatured_type
*));
4768 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4769 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4770 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4771 == dwarf2_per_objfile
->n_type_units
);
4776 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
4777 If SLOT is non-NULL, it is the entry to use in the hash table.
4778 Otherwise we find one. */
4780 static struct signatured_type
*
4781 add_type_unit (ULONGEST sig
, void **slot
)
4783 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4784 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4785 struct signatured_type
*sig_type
;
4787 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
4789 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
4791 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
4792 dwarf2_per_objfile
->n_allocated_type_units
= 1;
4793 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
4794 dwarf2_per_objfile
->all_type_units
4795 = xrealloc (dwarf2_per_objfile
->all_type_units
,
4796 dwarf2_per_objfile
->n_allocated_type_units
4797 * sizeof (struct signatured_type
*));
4798 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
4800 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4802 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4803 struct signatured_type
);
4804 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4805 sig_type
->signature
= sig
;
4806 sig_type
->per_cu
.is_debug_types
= 1;
4807 if (dwarf2_per_objfile
->using_index
)
4809 sig_type
->per_cu
.v
.quick
=
4810 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4811 struct dwarf2_per_cu_quick_data
);
4816 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4819 gdb_assert (*slot
== NULL
);
4821 /* The rest of sig_type must be filled in by the caller. */
4825 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4826 Fill in SIG_ENTRY with DWO_ENTRY. */
4829 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4830 struct signatured_type
*sig_entry
,
4831 struct dwo_unit
*dwo_entry
)
4833 /* Make sure we're not clobbering something we don't expect to. */
4834 gdb_assert (! sig_entry
->per_cu
.queued
);
4835 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4836 if (dwarf2_per_objfile
->using_index
)
4838 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4839 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
4842 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
4843 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4844 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4845 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4846 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4848 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4849 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4850 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4851 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4852 sig_entry
->per_cu
.objfile
= objfile
;
4853 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4854 sig_entry
->dwo_unit
= dwo_entry
;
4857 /* Subroutine of lookup_signatured_type.
4858 If we haven't read the TU yet, create the signatured_type data structure
4859 for a TU to be read in directly from a DWO file, bypassing the stub.
4860 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4861 using .gdb_index, then when reading a CU we want to stay in the DWO file
4862 containing that CU. Otherwise we could end up reading several other DWO
4863 files (due to comdat folding) to process the transitive closure of all the
4864 mentioned TUs, and that can be slow. The current DWO file will have every
4865 type signature that it needs.
4866 We only do this for .gdb_index because in the psymtab case we already have
4867 to read all the DWOs to build the type unit groups. */
4869 static struct signatured_type
*
4870 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4872 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4873 struct dwo_file
*dwo_file
;
4874 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4875 struct signatured_type find_sig_entry
, *sig_entry
;
4878 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4880 /* If TU skeletons have been removed then we may not have read in any
4882 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4884 dwarf2_per_objfile
->signatured_types
4885 = allocate_signatured_type_table (objfile
);
4888 /* We only ever need to read in one copy of a signatured type.
4889 Use the global signatured_types array to do our own comdat-folding
4890 of types. If this is the first time we're reading this TU, and
4891 the TU has an entry in .gdb_index, replace the recorded data from
4892 .gdb_index with this TU. */
4894 find_sig_entry
.signature
= sig
;
4895 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4896 &find_sig_entry
, INSERT
);
4899 /* We can get here with the TU already read, *or* in the process of being
4900 read. Don't reassign the global entry to point to this DWO if that's
4901 the case. Also note that if the TU is already being read, it may not
4902 have come from a DWO, the program may be a mix of Fission-compiled
4903 code and non-Fission-compiled code. */
4905 /* Have we already tried to read this TU?
4906 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4907 needn't exist in the global table yet). */
4908 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
4911 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4912 dwo_unit of the TU itself. */
4913 dwo_file
= cu
->dwo_unit
->dwo_file
;
4915 /* Ok, this is the first time we're reading this TU. */
4916 if (dwo_file
->tus
== NULL
)
4918 find_dwo_entry
.signature
= sig
;
4919 dwo_entry
= htab_find (dwo_file
->tus
, &find_dwo_entry
);
4920 if (dwo_entry
== NULL
)
4923 /* If the global table doesn't have an entry for this TU, add one. */
4924 if (sig_entry
== NULL
)
4925 sig_entry
= add_type_unit (sig
, slot
);
4927 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4928 sig_entry
->per_cu
.tu_read
= 1;
4932 /* Subroutine of lookup_signatured_type.
4933 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4934 then try the DWP file. If the TU stub (skeleton) has been removed then
4935 it won't be in .gdb_index. */
4937 static struct signatured_type
*
4938 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4940 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4941 struct dwp_file
*dwp_file
= get_dwp_file ();
4942 struct dwo_unit
*dwo_entry
;
4943 struct signatured_type find_sig_entry
, *sig_entry
;
4946 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4947 gdb_assert (dwp_file
!= NULL
);
4949 /* If TU skeletons have been removed then we may not have read in any
4951 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4953 dwarf2_per_objfile
->signatured_types
4954 = allocate_signatured_type_table (objfile
);
4957 find_sig_entry
.signature
= sig
;
4958 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4959 &find_sig_entry
, INSERT
);
4962 /* Have we already tried to read this TU?
4963 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4964 needn't exist in the global table yet). */
4965 if (sig_entry
!= NULL
)
4968 if (dwp_file
->tus
== NULL
)
4970 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
4971 sig
, 1 /* is_debug_types */);
4972 if (dwo_entry
== NULL
)
4975 sig_entry
= add_type_unit (sig
, slot
);
4976 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4981 /* Lookup a signature based type for DW_FORM_ref_sig8.
4982 Returns NULL if signature SIG is not present in the table.
4983 It is up to the caller to complain about this. */
4985 static struct signatured_type
*
4986 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4989 && dwarf2_per_objfile
->using_index
)
4991 /* We're in a DWO/DWP file, and we're using .gdb_index.
4992 These cases require special processing. */
4993 if (get_dwp_file () == NULL
)
4994 return lookup_dwo_signatured_type (cu
, sig
);
4996 return lookup_dwp_signatured_type (cu
, sig
);
5000 struct signatured_type find_entry
, *entry
;
5002 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5004 find_entry
.signature
= sig
;
5005 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
5010 /* Low level DIE reading support. */
5012 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
5015 init_cu_die_reader (struct die_reader_specs
*reader
,
5016 struct dwarf2_cu
*cu
,
5017 struct dwarf2_section_info
*section
,
5018 struct dwo_file
*dwo_file
)
5020 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5021 reader
->abfd
= get_section_bfd_owner (section
);
5023 reader
->dwo_file
= dwo_file
;
5024 reader
->die_section
= section
;
5025 reader
->buffer
= section
->buffer
;
5026 reader
->buffer_end
= section
->buffer
+ section
->size
;
5027 reader
->comp_dir
= NULL
;
5030 /* Subroutine of init_cutu_and_read_dies to simplify it.
5031 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5032 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5035 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5036 from it to the DIE in the DWO. If NULL we are skipping the stub.
5037 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5038 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5039 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5040 STUB_COMP_DIR may be non-NULL.
5041 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5042 are filled in with the info of the DIE from the DWO file.
5043 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5044 provided an abbrev table to use.
5045 The result is non-zero if a valid (non-dummy) DIE was found. */
5048 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5049 struct dwo_unit
*dwo_unit
,
5050 int abbrev_table_provided
,
5051 struct die_info
*stub_comp_unit_die
,
5052 const char *stub_comp_dir
,
5053 struct die_reader_specs
*result_reader
,
5054 const gdb_byte
**result_info_ptr
,
5055 struct die_info
**result_comp_unit_die
,
5056 int *result_has_children
)
5058 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5059 struct dwarf2_cu
*cu
= this_cu
->cu
;
5060 struct dwarf2_section_info
*section
;
5062 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5063 ULONGEST signature
; /* Or dwo_id. */
5064 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5065 int i
,num_extra_attrs
;
5066 struct dwarf2_section_info
*dwo_abbrev_section
;
5067 struct attribute
*attr
;
5068 struct die_info
*comp_unit_die
;
5070 /* At most one of these may be provided. */
5071 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5073 /* These attributes aren't processed until later:
5074 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5075 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5076 referenced later. However, these attributes are found in the stub
5077 which we won't have later. In order to not impose this complication
5078 on the rest of the code, we read them here and copy them to the
5087 if (stub_comp_unit_die
!= NULL
)
5089 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5091 if (! this_cu
->is_debug_types
)
5092 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5093 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5094 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5095 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5096 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5098 /* There should be a DW_AT_addr_base attribute here (if needed).
5099 We need the value before we can process DW_FORM_GNU_addr_index. */
5101 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5103 cu
->addr_base
= DW_UNSND (attr
);
5105 /* There should be a DW_AT_ranges_base attribute here (if needed).
5106 We need the value before we can process DW_AT_ranges. */
5107 cu
->ranges_base
= 0;
5108 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5110 cu
->ranges_base
= DW_UNSND (attr
);
5112 else if (stub_comp_dir
!= NULL
)
5114 /* Reconstruct the comp_dir attribute to simplify the code below. */
5115 comp_dir
= (struct attribute
*)
5116 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (*comp_dir
));
5117 comp_dir
->name
= DW_AT_comp_dir
;
5118 comp_dir
->form
= DW_FORM_string
;
5119 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5120 DW_STRING (comp_dir
) = stub_comp_dir
;
5123 /* Set up for reading the DWO CU/TU. */
5124 cu
->dwo_unit
= dwo_unit
;
5125 section
= dwo_unit
->section
;
5126 dwarf2_read_section (objfile
, section
);
5127 abfd
= get_section_bfd_owner (section
);
5128 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5129 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5130 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5132 if (this_cu
->is_debug_types
)
5134 ULONGEST header_signature
;
5135 cu_offset type_offset_in_tu
;
5136 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5138 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5142 &type_offset_in_tu
);
5143 /* This is not an assert because it can be caused by bad debug info. */
5144 if (sig_type
->signature
!= header_signature
)
5146 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5147 " TU at offset 0x%x [in module %s]"),
5148 hex_string (sig_type
->signature
),
5149 hex_string (header_signature
),
5150 dwo_unit
->offset
.sect_off
,
5151 bfd_get_filename (abfd
));
5153 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5154 /* For DWOs coming from DWP files, we don't know the CU length
5155 nor the type's offset in the TU until now. */
5156 dwo_unit
->length
= get_cu_length (&cu
->header
);
5157 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
5159 /* Establish the type offset that can be used to lookup the type.
5160 For DWO files, we don't know it until now. */
5161 sig_type
->type_offset_in_section
.sect_off
=
5162 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5166 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5169 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5170 /* For DWOs coming from DWP files, we don't know the CU length
5172 dwo_unit
->length
= get_cu_length (&cu
->header
);
5175 /* Replace the CU's original abbrev table with the DWO's.
5176 Reminder: We can't read the abbrev table until we've read the header. */
5177 if (abbrev_table_provided
)
5179 /* Don't free the provided abbrev table, the caller of
5180 init_cutu_and_read_dies owns it. */
5181 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5182 /* Ensure the DWO abbrev table gets freed. */
5183 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5187 dwarf2_free_abbrev_table (cu
);
5188 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5189 /* Leave any existing abbrev table cleanup as is. */
5192 /* Read in the die, but leave space to copy over the attributes
5193 from the stub. This has the benefit of simplifying the rest of
5194 the code - all the work to maintain the illusion of a single
5195 DW_TAG_{compile,type}_unit DIE is done here. */
5196 num_extra_attrs
= ((stmt_list
!= NULL
)
5200 + (comp_dir
!= NULL
));
5201 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5202 result_has_children
, num_extra_attrs
);
5204 /* Copy over the attributes from the stub to the DIE we just read in. */
5205 comp_unit_die
= *result_comp_unit_die
;
5206 i
= comp_unit_die
->num_attrs
;
5207 if (stmt_list
!= NULL
)
5208 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5210 comp_unit_die
->attrs
[i
++] = *low_pc
;
5211 if (high_pc
!= NULL
)
5212 comp_unit_die
->attrs
[i
++] = *high_pc
;
5214 comp_unit_die
->attrs
[i
++] = *ranges
;
5215 if (comp_dir
!= NULL
)
5216 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5217 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5219 if (dwarf2_die_debug
)
5221 fprintf_unfiltered (gdb_stdlog
,
5222 "Read die from %s@0x%x of %s:\n",
5223 get_section_name (section
),
5224 (unsigned) (begin_info_ptr
- section
->buffer
),
5225 bfd_get_filename (abfd
));
5226 dump_die (comp_unit_die
, dwarf2_die_debug
);
5229 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5230 TUs by skipping the stub and going directly to the entry in the DWO file.
5231 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5232 to get it via circuitous means. Blech. */
5233 if (comp_dir
!= NULL
)
5234 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5236 /* Skip dummy compilation units. */
5237 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5238 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5241 *result_info_ptr
= info_ptr
;
5245 /* Subroutine of init_cutu_and_read_dies to simplify it.
5246 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5247 Returns NULL if the specified DWO unit cannot be found. */
5249 static struct dwo_unit
*
5250 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5251 struct die_info
*comp_unit_die
)
5253 struct dwarf2_cu
*cu
= this_cu
->cu
;
5254 struct attribute
*attr
;
5256 struct dwo_unit
*dwo_unit
;
5257 const char *comp_dir
, *dwo_name
;
5259 gdb_assert (cu
!= NULL
);
5261 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5262 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5263 gdb_assert (attr
!= NULL
);
5264 dwo_name
= DW_STRING (attr
);
5266 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5268 comp_dir
= DW_STRING (attr
);
5270 if (this_cu
->is_debug_types
)
5272 struct signatured_type
*sig_type
;
5274 /* Since this_cu is the first member of struct signatured_type,
5275 we can go from a pointer to one to a pointer to the other. */
5276 sig_type
= (struct signatured_type
*) this_cu
;
5277 signature
= sig_type
->signature
;
5278 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5282 struct attribute
*attr
;
5284 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5286 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5288 dwo_name
, objfile_name (this_cu
->objfile
));
5289 signature
= DW_UNSND (attr
);
5290 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5297 /* Subroutine of init_cutu_and_read_dies to simplify it.
5298 See it for a description of the parameters.
5299 Read a TU directly from a DWO file, bypassing the stub.
5301 Note: This function could be a little bit simpler if we shared cleanups
5302 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5303 to do, so we keep this function self-contained. Or we could move this
5304 into our caller, but it's complex enough already. */
5307 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5308 int use_existing_cu
, int keep
,
5309 die_reader_func_ftype
*die_reader_func
,
5312 struct dwarf2_cu
*cu
;
5313 struct signatured_type
*sig_type
;
5314 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5315 struct die_reader_specs reader
;
5316 const gdb_byte
*info_ptr
;
5317 struct die_info
*comp_unit_die
;
5320 /* Verify we can do the following downcast, and that we have the
5322 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5323 sig_type
= (struct signatured_type
*) this_cu
;
5324 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5326 cleanups
= make_cleanup (null_cleanup
, NULL
);
5328 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5330 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5332 /* There's no need to do the rereading_dwo_cu handling that
5333 init_cutu_and_read_dies does since we don't read the stub. */
5337 /* If !use_existing_cu, this_cu->cu must be NULL. */
5338 gdb_assert (this_cu
->cu
== NULL
);
5339 cu
= xmalloc (sizeof (*cu
));
5340 init_one_comp_unit (cu
, this_cu
);
5341 /* If an error occurs while loading, release our storage. */
5342 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5345 /* A future optimization, if needed, would be to use an existing
5346 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5347 could share abbrev tables. */
5349 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5350 0 /* abbrev_table_provided */,
5351 NULL
/* stub_comp_unit_die */,
5352 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5354 &comp_unit_die
, &has_children
) == 0)
5357 do_cleanups (cleanups
);
5361 /* All the "real" work is done here. */
5362 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5364 /* This duplicates the code in init_cutu_and_read_dies,
5365 but the alternative is making the latter more complex.
5366 This function is only for the special case of using DWO files directly:
5367 no point in overly complicating the general case just to handle this. */
5368 if (free_cu_cleanup
!= NULL
)
5372 /* We've successfully allocated this compilation unit. Let our
5373 caller clean it up when finished with it. */
5374 discard_cleanups (free_cu_cleanup
);
5376 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5377 So we have to manually free the abbrev table. */
5378 dwarf2_free_abbrev_table (cu
);
5380 /* Link this CU into read_in_chain. */
5381 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5382 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5385 do_cleanups (free_cu_cleanup
);
5388 do_cleanups (cleanups
);
5391 /* Initialize a CU (or TU) and read its DIEs.
5392 If the CU defers to a DWO file, read the DWO file as well.
5394 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5395 Otherwise the table specified in the comp unit header is read in and used.
5396 This is an optimization for when we already have the abbrev table.
5398 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5399 Otherwise, a new CU is allocated with xmalloc.
5401 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5402 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5404 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5405 linker) then DIE_READER_FUNC will not get called. */
5408 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5409 struct abbrev_table
*abbrev_table
,
5410 int use_existing_cu
, int keep
,
5411 die_reader_func_ftype
*die_reader_func
,
5414 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5415 struct dwarf2_section_info
*section
= this_cu
->section
;
5416 bfd
*abfd
= get_section_bfd_owner (section
);
5417 struct dwarf2_cu
*cu
;
5418 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5419 struct die_reader_specs reader
;
5420 struct die_info
*comp_unit_die
;
5422 struct attribute
*attr
;
5423 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5424 struct signatured_type
*sig_type
= NULL
;
5425 struct dwarf2_section_info
*abbrev_section
;
5426 /* Non-zero if CU currently points to a DWO file and we need to
5427 reread it. When this happens we need to reread the skeleton die
5428 before we can reread the DWO file (this only applies to CUs, not TUs). */
5429 int rereading_dwo_cu
= 0;
5431 if (dwarf2_die_debug
)
5432 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5433 this_cu
->is_debug_types
? "type" : "comp",
5434 this_cu
->offset
.sect_off
);
5436 if (use_existing_cu
)
5439 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5440 file (instead of going through the stub), short-circuit all of this. */
5441 if (this_cu
->reading_dwo_directly
)
5443 /* Narrow down the scope of possibilities to have to understand. */
5444 gdb_assert (this_cu
->is_debug_types
);
5445 gdb_assert (abbrev_table
== NULL
);
5446 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5447 die_reader_func
, data
);
5451 cleanups
= make_cleanup (null_cleanup
, NULL
);
5453 /* This is cheap if the section is already read in. */
5454 dwarf2_read_section (objfile
, section
);
5456 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5458 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5460 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5463 /* If this CU is from a DWO file we need to start over, we need to
5464 refetch the attributes from the skeleton CU.
5465 This could be optimized by retrieving those attributes from when we
5466 were here the first time: the previous comp_unit_die was stored in
5467 comp_unit_obstack. But there's no data yet that we need this
5469 if (cu
->dwo_unit
!= NULL
)
5470 rereading_dwo_cu
= 1;
5474 /* If !use_existing_cu, this_cu->cu must be NULL. */
5475 gdb_assert (this_cu
->cu
== NULL
);
5476 cu
= xmalloc (sizeof (*cu
));
5477 init_one_comp_unit (cu
, this_cu
);
5478 /* If an error occurs while loading, release our storage. */
5479 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5482 /* Get the header. */
5483 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5485 /* We already have the header, there's no need to read it in again. */
5486 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5490 if (this_cu
->is_debug_types
)
5493 cu_offset type_offset_in_tu
;
5495 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5496 abbrev_section
, info_ptr
,
5498 &type_offset_in_tu
);
5500 /* Since per_cu is the first member of struct signatured_type,
5501 we can go from a pointer to one to a pointer to the other. */
5502 sig_type
= (struct signatured_type
*) this_cu
;
5503 gdb_assert (sig_type
->signature
== signature
);
5504 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5505 == type_offset_in_tu
.cu_off
);
5506 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5508 /* LENGTH has not been set yet for type units if we're
5509 using .gdb_index. */
5510 this_cu
->length
= get_cu_length (&cu
->header
);
5512 /* Establish the type offset that can be used to lookup the type. */
5513 sig_type
->type_offset_in_section
.sect_off
=
5514 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5518 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5522 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5523 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5527 /* Skip dummy compilation units. */
5528 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5529 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5531 do_cleanups (cleanups
);
5535 /* If we don't have them yet, read the abbrevs for this compilation unit.
5536 And if we need to read them now, make sure they're freed when we're
5537 done. Note that it's important that if the CU had an abbrev table
5538 on entry we don't free it when we're done: Somewhere up the call stack
5539 it may be in use. */
5540 if (abbrev_table
!= NULL
)
5542 gdb_assert (cu
->abbrev_table
== NULL
);
5543 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5544 == abbrev_table
->offset
.sect_off
);
5545 cu
->abbrev_table
= abbrev_table
;
5547 else if (cu
->abbrev_table
== NULL
)
5549 dwarf2_read_abbrevs (cu
, abbrev_section
);
5550 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5552 else if (rereading_dwo_cu
)
5554 dwarf2_free_abbrev_table (cu
);
5555 dwarf2_read_abbrevs (cu
, abbrev_section
);
5558 /* Read the top level CU/TU die. */
5559 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5560 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5562 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5564 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5565 DWO CU, that this test will fail (the attribute will not be present). */
5566 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5569 struct dwo_unit
*dwo_unit
;
5570 struct die_info
*dwo_comp_unit_die
;
5574 complaint (&symfile_complaints
,
5575 _("compilation unit with DW_AT_GNU_dwo_name"
5576 " has children (offset 0x%x) [in module %s]"),
5577 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5579 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5580 if (dwo_unit
!= NULL
)
5582 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5583 abbrev_table
!= NULL
,
5584 comp_unit_die
, NULL
,
5586 &dwo_comp_unit_die
, &has_children
) == 0)
5589 do_cleanups (cleanups
);
5592 comp_unit_die
= dwo_comp_unit_die
;
5596 /* Yikes, we couldn't find the rest of the DIE, we only have
5597 the stub. A complaint has already been logged. There's
5598 not much more we can do except pass on the stub DIE to
5599 die_reader_func. We don't want to throw an error on bad
5604 /* All of the above is setup for this call. Yikes. */
5605 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5607 /* Done, clean up. */
5608 if (free_cu_cleanup
!= NULL
)
5612 /* We've successfully allocated this compilation unit. Let our
5613 caller clean it up when finished with it. */
5614 discard_cleanups (free_cu_cleanup
);
5616 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5617 So we have to manually free the abbrev table. */
5618 dwarf2_free_abbrev_table (cu
);
5620 /* Link this CU into read_in_chain. */
5621 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5622 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5625 do_cleanups (free_cu_cleanup
);
5628 do_cleanups (cleanups
);
5631 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5632 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5633 to have already done the lookup to find the DWO file).
5635 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5636 THIS_CU->is_debug_types, but nothing else.
5638 We fill in THIS_CU->length.
5640 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5641 linker) then DIE_READER_FUNC will not get called.
5643 THIS_CU->cu is always freed when done.
5644 This is done in order to not leave THIS_CU->cu in a state where we have
5645 to care whether it refers to the "main" CU or the DWO CU. */
5648 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5649 struct dwo_file
*dwo_file
,
5650 die_reader_func_ftype
*die_reader_func
,
5653 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5654 struct dwarf2_section_info
*section
= this_cu
->section
;
5655 bfd
*abfd
= get_section_bfd_owner (section
);
5656 struct dwarf2_section_info
*abbrev_section
;
5657 struct dwarf2_cu cu
;
5658 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5659 struct die_reader_specs reader
;
5660 struct cleanup
*cleanups
;
5661 struct die_info
*comp_unit_die
;
5664 if (dwarf2_die_debug
)
5665 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5666 this_cu
->is_debug_types
? "type" : "comp",
5667 this_cu
->offset
.sect_off
);
5669 gdb_assert (this_cu
->cu
== NULL
);
5671 abbrev_section
= (dwo_file
!= NULL
5672 ? &dwo_file
->sections
.abbrev
5673 : get_abbrev_section_for_cu (this_cu
));
5675 /* This is cheap if the section is already read in. */
5676 dwarf2_read_section (objfile
, section
);
5678 init_one_comp_unit (&cu
, this_cu
);
5680 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5682 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5683 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5684 abbrev_section
, info_ptr
,
5685 this_cu
->is_debug_types
);
5687 this_cu
->length
= get_cu_length (&cu
.header
);
5689 /* Skip dummy compilation units. */
5690 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5691 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5693 do_cleanups (cleanups
);
5697 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5698 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5700 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5701 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5703 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5705 do_cleanups (cleanups
);
5708 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5709 does not lookup the specified DWO file.
5710 This cannot be used to read DWO files.
5712 THIS_CU->cu is always freed when done.
5713 This is done in order to not leave THIS_CU->cu in a state where we have
5714 to care whether it refers to the "main" CU or the DWO CU.
5715 We can revisit this if the data shows there's a performance issue. */
5718 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5719 die_reader_func_ftype
*die_reader_func
,
5722 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5725 /* Type Unit Groups.
5727 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5728 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5729 so that all types coming from the same compilation (.o file) are grouped
5730 together. A future step could be to put the types in the same symtab as
5731 the CU the types ultimately came from. */
5734 hash_type_unit_group (const void *item
)
5736 const struct type_unit_group
*tu_group
= item
;
5738 return hash_stmt_list_entry (&tu_group
->hash
);
5742 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5744 const struct type_unit_group
*lhs
= item_lhs
;
5745 const struct type_unit_group
*rhs
= item_rhs
;
5747 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5750 /* Allocate a hash table for type unit groups. */
5753 allocate_type_unit_groups_table (void)
5755 return htab_create_alloc_ex (3,
5756 hash_type_unit_group
,
5759 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5760 hashtab_obstack_allocate
,
5761 dummy_obstack_deallocate
);
5764 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5765 partial symtabs. We combine several TUs per psymtab to not let the size
5766 of any one psymtab grow too big. */
5767 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5768 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5770 /* Helper routine for get_type_unit_group.
5771 Create the type_unit_group object used to hold one or more TUs. */
5773 static struct type_unit_group
*
5774 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5776 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5777 struct dwarf2_per_cu_data
*per_cu
;
5778 struct type_unit_group
*tu_group
;
5780 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5781 struct type_unit_group
);
5782 per_cu
= &tu_group
->per_cu
;
5783 per_cu
->objfile
= objfile
;
5785 if (dwarf2_per_objfile
->using_index
)
5787 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5788 struct dwarf2_per_cu_quick_data
);
5792 unsigned int line_offset
= line_offset_struct
.sect_off
;
5793 struct partial_symtab
*pst
;
5796 /* Give the symtab a useful name for debug purposes. */
5797 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5798 name
= xstrprintf ("<type_units_%d>",
5799 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5801 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5803 pst
= create_partial_symtab (per_cu
, name
);
5809 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5810 tu_group
->hash
.line_offset
= line_offset_struct
;
5815 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5816 STMT_LIST is a DW_AT_stmt_list attribute. */
5818 static struct type_unit_group
*
5819 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5821 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5822 struct type_unit_group
*tu_group
;
5824 unsigned int line_offset
;
5825 struct type_unit_group type_unit_group_for_lookup
;
5827 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5829 dwarf2_per_objfile
->type_unit_groups
=
5830 allocate_type_unit_groups_table ();
5833 /* Do we need to create a new group, or can we use an existing one? */
5837 line_offset
= DW_UNSND (stmt_list
);
5838 ++tu_stats
->nr_symtab_sharers
;
5842 /* Ugh, no stmt_list. Rare, but we have to handle it.
5843 We can do various things here like create one group per TU or
5844 spread them over multiple groups to split up the expansion work.
5845 To avoid worst case scenarios (too many groups or too large groups)
5846 we, umm, group them in bunches. */
5847 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5848 | (tu_stats
->nr_stmt_less_type_units
5849 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5850 ++tu_stats
->nr_stmt_less_type_units
;
5853 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5854 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5855 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5856 &type_unit_group_for_lookup
, INSERT
);
5860 gdb_assert (tu_group
!= NULL
);
5864 sect_offset line_offset_struct
;
5866 line_offset_struct
.sect_off
= line_offset
;
5867 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5869 ++tu_stats
->nr_symtabs
;
5875 /* Partial symbol tables. */
5877 /* Create a psymtab named NAME and assign it to PER_CU.
5879 The caller must fill in the following details:
5880 dirname, textlow, texthigh. */
5882 static struct partial_symtab
*
5883 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5885 struct objfile
*objfile
= per_cu
->objfile
;
5886 struct partial_symtab
*pst
;
5888 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
5890 objfile
->global_psymbols
.next
,
5891 objfile
->static_psymbols
.next
);
5893 pst
->psymtabs_addrmap_supported
= 1;
5895 /* This is the glue that links PST into GDB's symbol API. */
5896 pst
->read_symtab_private
= per_cu
;
5897 pst
->read_symtab
= dwarf2_read_symtab
;
5898 per_cu
->v
.psymtab
= pst
;
5903 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5906 struct process_psymtab_comp_unit_data
5908 /* True if we are reading a DW_TAG_partial_unit. */
5910 int want_partial_unit
;
5912 /* The "pretend" language that is used if the CU doesn't declare a
5915 enum language pretend_language
;
5918 /* die_reader_func for process_psymtab_comp_unit. */
5921 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5922 const gdb_byte
*info_ptr
,
5923 struct die_info
*comp_unit_die
,
5927 struct dwarf2_cu
*cu
= reader
->cu
;
5928 struct objfile
*objfile
= cu
->objfile
;
5929 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5930 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5931 struct attribute
*attr
;
5933 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
5934 struct partial_symtab
*pst
;
5936 const char *filename
;
5937 struct process_psymtab_comp_unit_data
*info
= data
;
5939 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
5942 gdb_assert (! per_cu
->is_debug_types
);
5944 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
5946 cu
->list_in_scope
= &file_symbols
;
5948 /* Allocate a new partial symbol table structure. */
5949 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
5950 if (attr
== NULL
|| !DW_STRING (attr
))
5953 filename
= DW_STRING (attr
);
5955 pst
= create_partial_symtab (per_cu
, filename
);
5957 /* This must be done before calling dwarf2_build_include_psymtabs. */
5958 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5960 pst
->dirname
= DW_STRING (attr
);
5962 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5964 dwarf2_find_base_address (comp_unit_die
, cu
);
5966 /* Possibly set the default values of LOWPC and HIGHPC from
5968 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
5969 &best_highpc
, cu
, pst
);
5970 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
5971 /* Store the contiguous range if it is not empty; it can be empty for
5972 CUs with no code. */
5973 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5974 gdbarch_adjust_dwarf2_addr (gdbarch
,
5975 best_lowpc
+ baseaddr
),
5976 gdbarch_adjust_dwarf2_addr (gdbarch
,
5977 best_highpc
+ baseaddr
) - 1,
5980 /* Check if comp unit has_children.
5981 If so, read the rest of the partial symbols from this comp unit.
5982 If not, there's no more debug_info for this comp unit. */
5985 struct partial_die_info
*first_die
;
5986 CORE_ADDR lowpc
, highpc
;
5988 lowpc
= ((CORE_ADDR
) -1);
5989 highpc
= ((CORE_ADDR
) 0);
5991 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5993 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
5996 /* If we didn't find a lowpc, set it to highpc to avoid
5997 complaints from `maint check'. */
5998 if (lowpc
== ((CORE_ADDR
) -1))
6001 /* If the compilation unit didn't have an explicit address range,
6002 then use the information extracted from its child dies. */
6006 best_highpc
= highpc
;
6009 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
6010 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
6012 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
6013 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
6014 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
6015 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
6016 sort_pst_symbols (objfile
, pst
);
6018 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6021 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6022 struct dwarf2_per_cu_data
*iter
;
6024 /* Fill in 'dependencies' here; we fill in 'users' in a
6026 pst
->number_of_dependencies
= len
;
6027 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
6028 len
* sizeof (struct symtab
*));
6030 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6033 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6035 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6038 /* Get the list of files included in the current compilation unit,
6039 and build a psymtab for each of them. */
6040 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6042 if (dwarf2_read_debug
)
6044 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6046 fprintf_unfiltered (gdb_stdlog
,
6047 "Psymtab for %s unit @0x%x: %s - %s"
6048 ", %d global, %d static syms\n",
6049 per_cu
->is_debug_types
? "type" : "comp",
6050 per_cu
->offset
.sect_off
,
6051 paddress (gdbarch
, pst
->textlow
),
6052 paddress (gdbarch
, pst
->texthigh
),
6053 pst
->n_global_syms
, pst
->n_static_syms
);
6057 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6058 Process compilation unit THIS_CU for a psymtab. */
6061 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6062 int want_partial_unit
,
6063 enum language pretend_language
)
6065 struct process_psymtab_comp_unit_data info
;
6067 /* If this compilation unit was already read in, free the
6068 cached copy in order to read it in again. This is
6069 necessary because we skipped some symbols when we first
6070 read in the compilation unit (see load_partial_dies).
6071 This problem could be avoided, but the benefit is unclear. */
6072 if (this_cu
->cu
!= NULL
)
6073 free_one_cached_comp_unit (this_cu
);
6075 gdb_assert (! this_cu
->is_debug_types
);
6076 info
.want_partial_unit
= want_partial_unit
;
6077 info
.pretend_language
= pretend_language
;
6078 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6079 process_psymtab_comp_unit_reader
,
6082 /* Age out any secondary CUs. */
6083 age_cached_comp_units ();
6086 /* Reader function for build_type_psymtabs. */
6089 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6090 const gdb_byte
*info_ptr
,
6091 struct die_info
*type_unit_die
,
6095 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6096 struct dwarf2_cu
*cu
= reader
->cu
;
6097 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6098 struct signatured_type
*sig_type
;
6099 struct type_unit_group
*tu_group
;
6100 struct attribute
*attr
;
6101 struct partial_die_info
*first_die
;
6102 CORE_ADDR lowpc
, highpc
;
6103 struct partial_symtab
*pst
;
6105 gdb_assert (data
== NULL
);
6106 gdb_assert (per_cu
->is_debug_types
);
6107 sig_type
= (struct signatured_type
*) per_cu
;
6112 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6113 tu_group
= get_type_unit_group (cu
, attr
);
6115 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6117 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6118 cu
->list_in_scope
= &file_symbols
;
6119 pst
= create_partial_symtab (per_cu
, "");
6122 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6124 lowpc
= (CORE_ADDR
) -1;
6125 highpc
= (CORE_ADDR
) 0;
6126 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6128 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
6129 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
6130 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
6131 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
6132 sort_pst_symbols (objfile
, pst
);
6135 /* Struct used to sort TUs by their abbreviation table offset. */
6137 struct tu_abbrev_offset
6139 struct signatured_type
*sig_type
;
6140 sect_offset abbrev_offset
;
6143 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6146 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6148 const struct tu_abbrev_offset
* const *a
= ap
;
6149 const struct tu_abbrev_offset
* const *b
= bp
;
6150 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
6151 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
6153 return (aoff
> boff
) - (aoff
< boff
);
6156 /* Efficiently read all the type units.
6157 This does the bulk of the work for build_type_psymtabs.
6159 The efficiency is because we sort TUs by the abbrev table they use and
6160 only read each abbrev table once. In one program there are 200K TUs
6161 sharing 8K abbrev tables.
6163 The main purpose of this function is to support building the
6164 dwarf2_per_objfile->type_unit_groups table.
6165 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6166 can collapse the search space by grouping them by stmt_list.
6167 The savings can be significant, in the same program from above the 200K TUs
6168 share 8K stmt_list tables.
6170 FUNC is expected to call get_type_unit_group, which will create the
6171 struct type_unit_group if necessary and add it to
6172 dwarf2_per_objfile->type_unit_groups. */
6175 build_type_psymtabs_1 (void)
6177 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6178 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6179 struct cleanup
*cleanups
;
6180 struct abbrev_table
*abbrev_table
;
6181 sect_offset abbrev_offset
;
6182 struct tu_abbrev_offset
*sorted_by_abbrev
;
6183 struct type_unit_group
**iter
;
6186 /* It's up to the caller to not call us multiple times. */
6187 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6189 if (dwarf2_per_objfile
->n_type_units
== 0)
6192 /* TUs typically share abbrev tables, and there can be way more TUs than
6193 abbrev tables. Sort by abbrev table to reduce the number of times we
6194 read each abbrev table in.
6195 Alternatives are to punt or to maintain a cache of abbrev tables.
6196 This is simpler and efficient enough for now.
6198 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6199 symtab to use). Typically TUs with the same abbrev offset have the same
6200 stmt_list value too so in practice this should work well.
6202 The basic algorithm here is:
6204 sort TUs by abbrev table
6205 for each TU with same abbrev table:
6206 read abbrev table if first user
6207 read TU top level DIE
6208 [IWBN if DWO skeletons had DW_AT_stmt_list]
6211 if (dwarf2_read_debug
)
6212 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6214 /* Sort in a separate table to maintain the order of all_type_units
6215 for .gdb_index: TU indices directly index all_type_units. */
6216 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6217 dwarf2_per_objfile
->n_type_units
);
6218 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6220 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6222 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6223 sorted_by_abbrev
[i
].abbrev_offset
=
6224 read_abbrev_offset (sig_type
->per_cu
.section
,
6225 sig_type
->per_cu
.offset
);
6227 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6228 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6229 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6231 abbrev_offset
.sect_off
= ~(unsigned) 0;
6232 abbrev_table
= NULL
;
6233 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6235 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6237 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6239 /* Switch to the next abbrev table if necessary. */
6240 if (abbrev_table
== NULL
6241 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
6243 if (abbrev_table
!= NULL
)
6245 abbrev_table_free (abbrev_table
);
6246 /* Reset to NULL in case abbrev_table_read_table throws
6247 an error: abbrev_table_free_cleanup will get called. */
6248 abbrev_table
= NULL
;
6250 abbrev_offset
= tu
->abbrev_offset
;
6252 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6254 ++tu_stats
->nr_uniq_abbrev_tables
;
6257 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6258 build_type_psymtabs_reader
, NULL
);
6261 do_cleanups (cleanups
);
6264 /* Print collected type unit statistics. */
6267 print_tu_stats (void)
6269 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6271 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6272 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6273 dwarf2_per_objfile
->n_type_units
);
6274 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6275 tu_stats
->nr_uniq_abbrev_tables
);
6276 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6277 tu_stats
->nr_symtabs
);
6278 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6279 tu_stats
->nr_symtab_sharers
);
6280 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6281 tu_stats
->nr_stmt_less_type_units
);
6282 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6283 tu_stats
->nr_all_type_units_reallocs
);
6286 /* Traversal function for build_type_psymtabs. */
6289 build_type_psymtab_dependencies (void **slot
, void *info
)
6291 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6292 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6293 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6294 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6295 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6296 struct signatured_type
*iter
;
6299 gdb_assert (len
> 0);
6300 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6302 pst
->number_of_dependencies
= len
;
6303 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
6304 len
* sizeof (struct psymtab
*));
6306 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6309 gdb_assert (iter
->per_cu
.is_debug_types
);
6310 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6311 iter
->type_unit_group
= tu_group
;
6314 VEC_free (sig_type_ptr
, tu_group
->tus
);
6319 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6320 Build partial symbol tables for the .debug_types comp-units. */
6323 build_type_psymtabs (struct objfile
*objfile
)
6325 if (! create_all_type_units (objfile
))
6328 build_type_psymtabs_1 ();
6331 /* Traversal function for process_skeletonless_type_unit.
6332 Read a TU in a DWO file and build partial symbols for it. */
6335 process_skeletonless_type_unit (void **slot
, void *info
)
6337 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6338 struct objfile
*objfile
= info
;
6339 struct signatured_type find_entry
, *entry
;
6341 /* If this TU doesn't exist in the global table, add it and read it in. */
6343 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6345 dwarf2_per_objfile
->signatured_types
6346 = allocate_signatured_type_table (objfile
);
6349 find_entry
.signature
= dwo_unit
->signature
;
6350 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6352 /* If we've already seen this type there's nothing to do. What's happening
6353 is we're doing our own version of comdat-folding here. */
6357 /* This does the job that create_all_type_units would have done for
6359 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6360 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6363 /* This does the job that build_type_psymtabs_1 would have done. */
6364 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6365 build_type_psymtabs_reader
, NULL
);
6370 /* Traversal function for process_skeletonless_type_units. */
6373 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6375 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6377 if (dwo_file
->tus
!= NULL
)
6379 htab_traverse_noresize (dwo_file
->tus
,
6380 process_skeletonless_type_unit
, info
);
6386 /* Scan all TUs of DWO files, verifying we've processed them.
6387 This is needed in case a TU was emitted without its skeleton.
6388 Note: This can't be done until we know what all the DWO files are. */
6391 process_skeletonless_type_units (struct objfile
*objfile
)
6393 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6394 if (get_dwp_file () == NULL
6395 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6397 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6398 process_dwo_file_for_skeletonless_type_units
,
6403 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6406 psymtabs_addrmap_cleanup (void *o
)
6408 struct objfile
*objfile
= o
;
6410 objfile
->psymtabs_addrmap
= NULL
;
6413 /* Compute the 'user' field for each psymtab in OBJFILE. */
6416 set_partial_user (struct objfile
*objfile
)
6420 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6422 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6423 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6429 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6431 /* Set the 'user' field only if it is not already set. */
6432 if (pst
->dependencies
[j
]->user
== NULL
)
6433 pst
->dependencies
[j
]->user
= pst
;
6438 /* Build the partial symbol table by doing a quick pass through the
6439 .debug_info and .debug_abbrev sections. */
6442 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6444 struct cleanup
*back_to
, *addrmap_cleanup
;
6445 struct obstack temp_obstack
;
6448 if (dwarf2_read_debug
)
6450 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6451 objfile_name (objfile
));
6454 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6456 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6458 /* Any cached compilation units will be linked by the per-objfile
6459 read_in_chain. Make sure to free them when we're done. */
6460 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6462 build_type_psymtabs (objfile
);
6464 create_all_comp_units (objfile
);
6466 /* Create a temporary address map on a temporary obstack. We later
6467 copy this to the final obstack. */
6468 obstack_init (&temp_obstack
);
6469 make_cleanup_obstack_free (&temp_obstack
);
6470 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6471 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6473 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6475 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6477 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6480 /* This has to wait until we read the CUs, we need the list of DWOs. */
6481 process_skeletonless_type_units (objfile
);
6483 /* Now that all TUs have been processed we can fill in the dependencies. */
6484 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6486 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6487 build_type_psymtab_dependencies
, NULL
);
6490 if (dwarf2_read_debug
)
6493 set_partial_user (objfile
);
6495 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6496 &objfile
->objfile_obstack
);
6497 discard_cleanups (addrmap_cleanup
);
6499 do_cleanups (back_to
);
6501 if (dwarf2_read_debug
)
6502 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6503 objfile_name (objfile
));
6506 /* die_reader_func for load_partial_comp_unit. */
6509 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6510 const gdb_byte
*info_ptr
,
6511 struct die_info
*comp_unit_die
,
6515 struct dwarf2_cu
*cu
= reader
->cu
;
6517 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6519 /* Check if comp unit has_children.
6520 If so, read the rest of the partial symbols from this comp unit.
6521 If not, there's no more debug_info for this comp unit. */
6523 load_partial_dies (reader
, info_ptr
, 0);
6526 /* Load the partial DIEs for a secondary CU into memory.
6527 This is also used when rereading a primary CU with load_all_dies. */
6530 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6532 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6533 load_partial_comp_unit_reader
, NULL
);
6537 read_comp_units_from_section (struct objfile
*objfile
,
6538 struct dwarf2_section_info
*section
,
6539 unsigned int is_dwz
,
6542 struct dwarf2_per_cu_data
***all_comp_units
)
6544 const gdb_byte
*info_ptr
;
6545 bfd
*abfd
= get_section_bfd_owner (section
);
6547 if (dwarf2_read_debug
)
6548 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6549 get_section_name (section
),
6550 get_section_file_name (section
));
6552 dwarf2_read_section (objfile
, section
);
6554 info_ptr
= section
->buffer
;
6556 while (info_ptr
< section
->buffer
+ section
->size
)
6558 unsigned int length
, initial_length_size
;
6559 struct dwarf2_per_cu_data
*this_cu
;
6562 offset
.sect_off
= info_ptr
- section
->buffer
;
6564 /* Read just enough information to find out where the next
6565 compilation unit is. */
6566 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6568 /* Save the compilation unit for later lookup. */
6569 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
6570 sizeof (struct dwarf2_per_cu_data
));
6571 memset (this_cu
, 0, sizeof (*this_cu
));
6572 this_cu
->offset
= offset
;
6573 this_cu
->length
= length
+ initial_length_size
;
6574 this_cu
->is_dwz
= is_dwz
;
6575 this_cu
->objfile
= objfile
;
6576 this_cu
->section
= section
;
6578 if (*n_comp_units
== *n_allocated
)
6581 *all_comp_units
= xrealloc (*all_comp_units
,
6583 * sizeof (struct dwarf2_per_cu_data
*));
6585 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6588 info_ptr
= info_ptr
+ this_cu
->length
;
6592 /* Create a list of all compilation units in OBJFILE.
6593 This is only done for -readnow and building partial symtabs. */
6596 create_all_comp_units (struct objfile
*objfile
)
6600 struct dwarf2_per_cu_data
**all_comp_units
;
6601 struct dwz_file
*dwz
;
6605 all_comp_units
= xmalloc (n_allocated
6606 * sizeof (struct dwarf2_per_cu_data
*));
6608 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6609 &n_allocated
, &n_comp_units
, &all_comp_units
);
6611 dwz
= dwarf2_get_dwz_file ();
6613 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6614 &n_allocated
, &n_comp_units
,
6617 dwarf2_per_objfile
->all_comp_units
6618 = obstack_alloc (&objfile
->objfile_obstack
,
6619 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6620 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6621 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6622 xfree (all_comp_units
);
6623 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6626 /* Process all loaded DIEs for compilation unit CU, starting at
6627 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6628 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6629 DW_AT_ranges). See the comments of add_partial_subprogram on how
6630 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6633 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6634 CORE_ADDR
*highpc
, int set_addrmap
,
6635 struct dwarf2_cu
*cu
)
6637 struct partial_die_info
*pdi
;
6639 /* Now, march along the PDI's, descending into ones which have
6640 interesting children but skipping the children of the other ones,
6641 until we reach the end of the compilation unit. */
6647 fixup_partial_die (pdi
, cu
);
6649 /* Anonymous namespaces or modules have no name but have interesting
6650 children, so we need to look at them. Ditto for anonymous
6653 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6654 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6655 || pdi
->tag
== DW_TAG_imported_unit
)
6659 case DW_TAG_subprogram
:
6660 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6662 case DW_TAG_constant
:
6663 case DW_TAG_variable
:
6664 case DW_TAG_typedef
:
6665 case DW_TAG_union_type
:
6666 if (!pdi
->is_declaration
)
6668 add_partial_symbol (pdi
, cu
);
6671 case DW_TAG_class_type
:
6672 case DW_TAG_interface_type
:
6673 case DW_TAG_structure_type
:
6674 if (!pdi
->is_declaration
)
6676 add_partial_symbol (pdi
, cu
);
6679 case DW_TAG_enumeration_type
:
6680 if (!pdi
->is_declaration
)
6681 add_partial_enumeration (pdi
, cu
);
6683 case DW_TAG_base_type
:
6684 case DW_TAG_subrange_type
:
6685 /* File scope base type definitions are added to the partial
6687 add_partial_symbol (pdi
, cu
);
6689 case DW_TAG_namespace
:
6690 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6693 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6695 case DW_TAG_imported_unit
:
6697 struct dwarf2_per_cu_data
*per_cu
;
6699 /* For now we don't handle imported units in type units. */
6700 if (cu
->per_cu
->is_debug_types
)
6702 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6703 " supported in type units [in module %s]"),
6704 objfile_name (cu
->objfile
));
6707 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6711 /* Go read the partial unit, if needed. */
6712 if (per_cu
->v
.psymtab
== NULL
)
6713 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6715 VEC_safe_push (dwarf2_per_cu_ptr
,
6716 cu
->per_cu
->imported_symtabs
, per_cu
);
6719 case DW_TAG_imported_declaration
:
6720 add_partial_symbol (pdi
, cu
);
6727 /* If the die has a sibling, skip to the sibling. */
6729 pdi
= pdi
->die_sibling
;
6733 /* Functions used to compute the fully scoped name of a partial DIE.
6735 Normally, this is simple. For C++, the parent DIE's fully scoped
6736 name is concatenated with "::" and the partial DIE's name. For
6737 Java, the same thing occurs except that "." is used instead of "::".
6738 Enumerators are an exception; they use the scope of their parent
6739 enumeration type, i.e. the name of the enumeration type is not
6740 prepended to the enumerator.
6742 There are two complexities. One is DW_AT_specification; in this
6743 case "parent" means the parent of the target of the specification,
6744 instead of the direct parent of the DIE. The other is compilers
6745 which do not emit DW_TAG_namespace; in this case we try to guess
6746 the fully qualified name of structure types from their members'
6747 linkage names. This must be done using the DIE's children rather
6748 than the children of any DW_AT_specification target. We only need
6749 to do this for structures at the top level, i.e. if the target of
6750 any DW_AT_specification (if any; otherwise the DIE itself) does not
6753 /* Compute the scope prefix associated with PDI's parent, in
6754 compilation unit CU. The result will be allocated on CU's
6755 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6756 field. NULL is returned if no prefix is necessary. */
6758 partial_die_parent_scope (struct partial_die_info
*pdi
,
6759 struct dwarf2_cu
*cu
)
6761 const char *grandparent_scope
;
6762 struct partial_die_info
*parent
, *real_pdi
;
6764 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6765 then this means the parent of the specification DIE. */
6768 while (real_pdi
->has_specification
)
6769 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6770 real_pdi
->spec_is_dwz
, cu
);
6772 parent
= real_pdi
->die_parent
;
6776 if (parent
->scope_set
)
6777 return parent
->scope
;
6779 fixup_partial_die (parent
, cu
);
6781 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6783 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6784 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6785 Work around this problem here. */
6786 if (cu
->language
== language_cplus
6787 && parent
->tag
== DW_TAG_namespace
6788 && strcmp (parent
->name
, "::") == 0
6789 && grandparent_scope
== NULL
)
6791 parent
->scope
= NULL
;
6792 parent
->scope_set
= 1;
6796 if (pdi
->tag
== DW_TAG_enumerator
)
6797 /* Enumerators should not get the name of the enumeration as a prefix. */
6798 parent
->scope
= grandparent_scope
;
6799 else if (parent
->tag
== DW_TAG_namespace
6800 || parent
->tag
== DW_TAG_module
6801 || parent
->tag
== DW_TAG_structure_type
6802 || parent
->tag
== DW_TAG_class_type
6803 || parent
->tag
== DW_TAG_interface_type
6804 || parent
->tag
== DW_TAG_union_type
6805 || parent
->tag
== DW_TAG_enumeration_type
)
6807 if (grandparent_scope
== NULL
)
6808 parent
->scope
= parent
->name
;
6810 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6812 parent
->name
, 0, cu
);
6816 /* FIXME drow/2004-04-01: What should we be doing with
6817 function-local names? For partial symbols, we should probably be
6819 complaint (&symfile_complaints
,
6820 _("unhandled containing DIE tag %d for DIE at %d"),
6821 parent
->tag
, pdi
->offset
.sect_off
);
6822 parent
->scope
= grandparent_scope
;
6825 parent
->scope_set
= 1;
6826 return parent
->scope
;
6829 /* Return the fully scoped name associated with PDI, from compilation unit
6830 CU. The result will be allocated with malloc. */
6833 partial_die_full_name (struct partial_die_info
*pdi
,
6834 struct dwarf2_cu
*cu
)
6836 const char *parent_scope
;
6838 /* If this is a template instantiation, we can not work out the
6839 template arguments from partial DIEs. So, unfortunately, we have
6840 to go through the full DIEs. At least any work we do building
6841 types here will be reused if full symbols are loaded later. */
6842 if (pdi
->has_template_arguments
)
6844 fixup_partial_die (pdi
, cu
);
6846 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6848 struct die_info
*die
;
6849 struct attribute attr
;
6850 struct dwarf2_cu
*ref_cu
= cu
;
6852 /* DW_FORM_ref_addr is using section offset. */
6854 attr
.form
= DW_FORM_ref_addr
;
6855 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6856 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6858 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6862 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6863 if (parent_scope
== NULL
)
6866 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6870 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6872 struct objfile
*objfile
= cu
->objfile
;
6873 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6875 const char *actual_name
= NULL
;
6877 char *built_actual_name
;
6879 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6881 built_actual_name
= partial_die_full_name (pdi
, cu
);
6882 if (built_actual_name
!= NULL
)
6883 actual_name
= built_actual_name
;
6885 if (actual_name
== NULL
)
6886 actual_name
= pdi
->name
;
6890 case DW_TAG_subprogram
:
6891 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
6892 if (pdi
->is_external
|| cu
->language
== language_ada
)
6894 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6895 of the global scope. But in Ada, we want to be able to access
6896 nested procedures globally. So all Ada subprograms are stored
6897 in the global scope. */
6898 /* prim_record_minimal_symbol (actual_name, addr, mst_text,
6900 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6901 built_actual_name
!= NULL
,
6902 VAR_DOMAIN
, LOC_BLOCK
,
6903 &objfile
->global_psymbols
,
6904 0, addr
, cu
->language
, objfile
);
6908 /* prim_record_minimal_symbol (actual_name, addr, mst_file_text,
6910 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6911 built_actual_name
!= NULL
,
6912 VAR_DOMAIN
, LOC_BLOCK
,
6913 &objfile
->static_psymbols
,
6914 0, addr
, cu
->language
, objfile
);
6917 case DW_TAG_constant
:
6919 struct psymbol_allocation_list
*list
;
6921 if (pdi
->is_external
)
6922 list
= &objfile
->global_psymbols
;
6924 list
= &objfile
->static_psymbols
;
6925 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6926 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6927 list
, 0, 0, cu
->language
, objfile
);
6930 case DW_TAG_variable
:
6932 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6936 && !dwarf2_per_objfile
->has_section_at_zero
)
6938 /* A global or static variable may also have been stripped
6939 out by the linker if unused, in which case its address
6940 will be nullified; do not add such variables into partial
6941 symbol table then. */
6943 else if (pdi
->is_external
)
6946 Don't enter into the minimal symbol tables as there is
6947 a minimal symbol table entry from the ELF symbols already.
6948 Enter into partial symbol table if it has a location
6949 descriptor or a type.
6950 If the location descriptor is missing, new_symbol will create
6951 a LOC_UNRESOLVED symbol, the address of the variable will then
6952 be determined from the minimal symbol table whenever the variable
6954 The address for the partial symbol table entry is not
6955 used by GDB, but it comes in handy for debugging partial symbol
6958 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6959 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6960 built_actual_name
!= NULL
,
6961 VAR_DOMAIN
, LOC_STATIC
,
6962 &objfile
->global_psymbols
,
6964 cu
->language
, objfile
);
6968 int has_loc
= pdi
->d
.locdesc
!= NULL
;
6970 /* Static Variable. Skip symbols whose value we cannot know (those
6971 without location descriptors or constant values). */
6972 if (!has_loc
&& !pdi
->has_const_value
)
6974 xfree (built_actual_name
);
6978 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
6979 mst_file_data, objfile); */
6980 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6981 built_actual_name
!= NULL
,
6982 VAR_DOMAIN
, LOC_STATIC
,
6983 &objfile
->static_psymbols
,
6985 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
6986 cu
->language
, objfile
);
6989 case DW_TAG_typedef
:
6990 case DW_TAG_base_type
:
6991 case DW_TAG_subrange_type
:
6992 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6993 built_actual_name
!= NULL
,
6994 VAR_DOMAIN
, LOC_TYPEDEF
,
6995 &objfile
->static_psymbols
,
6996 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6998 case DW_TAG_imported_declaration
:
6999 case DW_TAG_namespace
:
7000 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7001 built_actual_name
!= NULL
,
7002 VAR_DOMAIN
, LOC_TYPEDEF
,
7003 &objfile
->global_psymbols
,
7004 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7007 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7008 built_actual_name
!= NULL
,
7009 MODULE_DOMAIN
, LOC_TYPEDEF
,
7010 &objfile
->global_psymbols
,
7011 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7013 case DW_TAG_class_type
:
7014 case DW_TAG_interface_type
:
7015 case DW_TAG_structure_type
:
7016 case DW_TAG_union_type
:
7017 case DW_TAG_enumeration_type
:
7018 /* Skip external references. The DWARF standard says in the section
7019 about "Structure, Union, and Class Type Entries": "An incomplete
7020 structure, union or class type is represented by a structure,
7021 union or class entry that does not have a byte size attribute
7022 and that has a DW_AT_declaration attribute." */
7023 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7025 xfree (built_actual_name
);
7029 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7030 static vs. global. */
7031 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7032 built_actual_name
!= NULL
,
7033 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7034 (cu
->language
== language_cplus
7035 || cu
->language
== language_java
)
7036 ? &objfile
->global_psymbols
7037 : &objfile
->static_psymbols
,
7038 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7041 case DW_TAG_enumerator
:
7042 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7043 built_actual_name
!= NULL
,
7044 VAR_DOMAIN
, LOC_CONST
,
7045 (cu
->language
== language_cplus
7046 || cu
->language
== language_java
)
7047 ? &objfile
->global_psymbols
7048 : &objfile
->static_psymbols
,
7049 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7055 xfree (built_actual_name
);
7058 /* Read a partial die corresponding to a namespace; also, add a symbol
7059 corresponding to that namespace to the symbol table. NAMESPACE is
7060 the name of the enclosing namespace. */
7063 add_partial_namespace (struct partial_die_info
*pdi
,
7064 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7065 int set_addrmap
, struct dwarf2_cu
*cu
)
7067 /* Add a symbol for the namespace. */
7069 add_partial_symbol (pdi
, cu
);
7071 /* Now scan partial symbols in that namespace. */
7073 if (pdi
->has_children
)
7074 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7077 /* Read a partial die corresponding to a Fortran module. */
7080 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7081 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7083 /* Add a symbol for the namespace. */
7085 add_partial_symbol (pdi
, cu
);
7087 /* Now scan partial symbols in that module. */
7089 if (pdi
->has_children
)
7090 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7093 /* Read a partial die corresponding to a subprogram and create a partial
7094 symbol for that subprogram. When the CU language allows it, this
7095 routine also defines a partial symbol for each nested subprogram
7096 that this subprogram contains. If SET_ADDRMAP is true, record the
7097 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7098 and highest PC values found in PDI.
7100 PDI may also be a lexical block, in which case we simply search
7101 recursively for subprograms defined inside that lexical block.
7102 Again, this is only performed when the CU language allows this
7103 type of definitions. */
7106 add_partial_subprogram (struct partial_die_info
*pdi
,
7107 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7108 int set_addrmap
, struct dwarf2_cu
*cu
)
7110 if (pdi
->tag
== DW_TAG_subprogram
)
7112 if (pdi
->has_pc_info
)
7114 if (pdi
->lowpc
< *lowpc
)
7115 *lowpc
= pdi
->lowpc
;
7116 if (pdi
->highpc
> *highpc
)
7117 *highpc
= pdi
->highpc
;
7120 struct objfile
*objfile
= cu
->objfile
;
7121 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7126 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7127 SECT_OFF_TEXT (objfile
));
7128 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7129 pdi
->lowpc
+ baseaddr
);
7130 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7131 pdi
->highpc
+ baseaddr
);
7132 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7133 cu
->per_cu
->v
.psymtab
);
7137 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7139 if (!pdi
->is_declaration
)
7140 /* Ignore subprogram DIEs that do not have a name, they are
7141 illegal. Do not emit a complaint at this point, we will
7142 do so when we convert this psymtab into a symtab. */
7144 add_partial_symbol (pdi
, cu
);
7148 if (! pdi
->has_children
)
7151 if (cu
->language
== language_ada
)
7153 pdi
= pdi
->die_child
;
7156 fixup_partial_die (pdi
, cu
);
7157 if (pdi
->tag
== DW_TAG_subprogram
7158 || pdi
->tag
== DW_TAG_lexical_block
)
7159 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7160 pdi
= pdi
->die_sibling
;
7165 /* Read a partial die corresponding to an enumeration type. */
7168 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7169 struct dwarf2_cu
*cu
)
7171 struct partial_die_info
*pdi
;
7173 if (enum_pdi
->name
!= NULL
)
7174 add_partial_symbol (enum_pdi
, cu
);
7176 pdi
= enum_pdi
->die_child
;
7179 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7180 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7182 add_partial_symbol (pdi
, cu
);
7183 pdi
= pdi
->die_sibling
;
7187 /* Return the initial uleb128 in the die at INFO_PTR. */
7190 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7192 unsigned int bytes_read
;
7194 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7197 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7198 Return the corresponding abbrev, or NULL if the number is zero (indicating
7199 an empty DIE). In either case *BYTES_READ will be set to the length of
7200 the initial number. */
7202 static struct abbrev_info
*
7203 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7204 struct dwarf2_cu
*cu
)
7206 bfd
*abfd
= cu
->objfile
->obfd
;
7207 unsigned int abbrev_number
;
7208 struct abbrev_info
*abbrev
;
7210 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7212 if (abbrev_number
== 0)
7215 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7218 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7219 " at offset 0x%x [in module %s]"),
7220 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7221 cu
->header
.offset
.sect_off
, bfd_get_filename (abfd
));
7227 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7228 Returns a pointer to the end of a series of DIEs, terminated by an empty
7229 DIE. Any children of the skipped DIEs will also be skipped. */
7231 static const gdb_byte
*
7232 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7234 struct dwarf2_cu
*cu
= reader
->cu
;
7235 struct abbrev_info
*abbrev
;
7236 unsigned int bytes_read
;
7240 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7242 return info_ptr
+ bytes_read
;
7244 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7248 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7249 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7250 abbrev corresponding to that skipped uleb128 should be passed in
7251 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7254 static const gdb_byte
*
7255 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7256 struct abbrev_info
*abbrev
)
7258 unsigned int bytes_read
;
7259 struct attribute attr
;
7260 bfd
*abfd
= reader
->abfd
;
7261 struct dwarf2_cu
*cu
= reader
->cu
;
7262 const gdb_byte
*buffer
= reader
->buffer
;
7263 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7264 const gdb_byte
*start_info_ptr
= info_ptr
;
7265 unsigned int form
, i
;
7267 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7269 /* The only abbrev we care about is DW_AT_sibling. */
7270 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7272 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7273 if (attr
.form
== DW_FORM_ref_addr
)
7274 complaint (&symfile_complaints
,
7275 _("ignoring absolute DW_AT_sibling"));
7278 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7279 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7281 if (sibling_ptr
< info_ptr
)
7282 complaint (&symfile_complaints
,
7283 _("DW_AT_sibling points backwards"));
7284 else if (sibling_ptr
> reader
->buffer_end
)
7285 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7291 /* If it isn't DW_AT_sibling, skip this attribute. */
7292 form
= abbrev
->attrs
[i
].form
;
7296 case DW_FORM_ref_addr
:
7297 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7298 and later it is offset sized. */
7299 if (cu
->header
.version
== 2)
7300 info_ptr
+= cu
->header
.addr_size
;
7302 info_ptr
+= cu
->header
.offset_size
;
7304 case DW_FORM_GNU_ref_alt
:
7305 info_ptr
+= cu
->header
.offset_size
;
7308 info_ptr
+= cu
->header
.addr_size
;
7315 case DW_FORM_flag_present
:
7327 case DW_FORM_ref_sig8
:
7330 case DW_FORM_string
:
7331 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7332 info_ptr
+= bytes_read
;
7334 case DW_FORM_sec_offset
:
7336 case DW_FORM_GNU_strp_alt
:
7337 info_ptr
+= cu
->header
.offset_size
;
7339 case DW_FORM_exprloc
:
7341 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7342 info_ptr
+= bytes_read
;
7344 case DW_FORM_block1
:
7345 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7347 case DW_FORM_block2
:
7348 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7350 case DW_FORM_block4
:
7351 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7355 case DW_FORM_ref_udata
:
7356 case DW_FORM_GNU_addr_index
:
7357 case DW_FORM_GNU_str_index
:
7358 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7360 case DW_FORM_indirect
:
7361 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7362 info_ptr
+= bytes_read
;
7363 /* We need to continue parsing from here, so just go back to
7365 goto skip_attribute
;
7368 error (_("Dwarf Error: Cannot handle %s "
7369 "in DWARF reader [in module %s]"),
7370 dwarf_form_name (form
),
7371 bfd_get_filename (abfd
));
7375 if (abbrev
->has_children
)
7376 return skip_children (reader
, info_ptr
);
7381 /* Locate ORIG_PDI's sibling.
7382 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7384 static const gdb_byte
*
7385 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7386 struct partial_die_info
*orig_pdi
,
7387 const gdb_byte
*info_ptr
)
7389 /* Do we know the sibling already? */
7391 if (orig_pdi
->sibling
)
7392 return orig_pdi
->sibling
;
7394 /* Are there any children to deal with? */
7396 if (!orig_pdi
->has_children
)
7399 /* Skip the children the long way. */
7401 return skip_children (reader
, info_ptr
);
7404 /* Expand this partial symbol table into a full symbol table. SELF is
7408 dwarf2_read_symtab (struct partial_symtab
*self
,
7409 struct objfile
*objfile
)
7413 warning (_("bug: psymtab for %s is already read in."),
7420 printf_filtered (_("Reading in symbols for %s..."),
7422 gdb_flush (gdb_stdout
);
7425 /* Restore our global data. */
7426 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
7428 /* If this psymtab is constructed from a debug-only objfile, the
7429 has_section_at_zero flag will not necessarily be correct. We
7430 can get the correct value for this flag by looking at the data
7431 associated with the (presumably stripped) associated objfile. */
7432 if (objfile
->separate_debug_objfile_backlink
)
7434 struct dwarf2_per_objfile
*dpo_backlink
7435 = objfile_data (objfile
->separate_debug_objfile_backlink
,
7436 dwarf2_objfile_data_key
);
7438 dwarf2_per_objfile
->has_section_at_zero
7439 = dpo_backlink
->has_section_at_zero
;
7442 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7444 psymtab_to_symtab_1 (self
);
7446 /* Finish up the debug error message. */
7448 printf_filtered (_("done.\n"));
7451 process_cu_includes ();
7454 /* Reading in full CUs. */
7456 /* Add PER_CU to the queue. */
7459 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7460 enum language pretend_language
)
7462 struct dwarf2_queue_item
*item
;
7465 item
= xmalloc (sizeof (*item
));
7466 item
->per_cu
= per_cu
;
7467 item
->pretend_language
= pretend_language
;
7470 if (dwarf2_queue
== NULL
)
7471 dwarf2_queue
= item
;
7473 dwarf2_queue_tail
->next
= item
;
7475 dwarf2_queue_tail
= item
;
7478 /* If PER_CU is not yet queued, add it to the queue.
7479 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7481 The result is non-zero if PER_CU was queued, otherwise the result is zero
7482 meaning either PER_CU is already queued or it is already loaded.
7484 N.B. There is an invariant here that if a CU is queued then it is loaded.
7485 The caller is required to load PER_CU if we return non-zero. */
7488 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7489 struct dwarf2_per_cu_data
*per_cu
,
7490 enum language pretend_language
)
7492 /* We may arrive here during partial symbol reading, if we need full
7493 DIEs to process an unusual case (e.g. template arguments). Do
7494 not queue PER_CU, just tell our caller to load its DIEs. */
7495 if (dwarf2_per_objfile
->reading_partial_symbols
)
7497 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7502 /* Mark the dependence relation so that we don't flush PER_CU
7504 if (dependent_cu
!= NULL
)
7505 dwarf2_add_dependence (dependent_cu
, per_cu
);
7507 /* If it's already on the queue, we have nothing to do. */
7511 /* If the compilation unit is already loaded, just mark it as
7513 if (per_cu
->cu
!= NULL
)
7515 per_cu
->cu
->last_used
= 0;
7519 /* Add it to the queue. */
7520 queue_comp_unit (per_cu
, pretend_language
);
7525 /* Process the queue. */
7528 process_queue (void)
7530 struct dwarf2_queue_item
*item
, *next_item
;
7532 if (dwarf2_read_debug
)
7534 fprintf_unfiltered (gdb_stdlog
,
7535 "Expanding one or more symtabs of objfile %s ...\n",
7536 objfile_name (dwarf2_per_objfile
->objfile
));
7539 /* The queue starts out with one item, but following a DIE reference
7540 may load a new CU, adding it to the end of the queue. */
7541 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7543 if (dwarf2_per_objfile
->using_index
7544 ? !item
->per_cu
->v
.quick
->compunit_symtab
7545 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7547 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7548 unsigned int debug_print_threshold
;
7551 if (per_cu
->is_debug_types
)
7553 struct signatured_type
*sig_type
=
7554 (struct signatured_type
*) per_cu
;
7556 sprintf (buf
, "TU %s at offset 0x%x",
7557 hex_string (sig_type
->signature
),
7558 per_cu
->offset
.sect_off
);
7559 /* There can be 100s of TUs.
7560 Only print them in verbose mode. */
7561 debug_print_threshold
= 2;
7565 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7566 debug_print_threshold
= 1;
7569 if (dwarf2_read_debug
>= debug_print_threshold
)
7570 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7572 if (per_cu
->is_debug_types
)
7573 process_full_type_unit (per_cu
, item
->pretend_language
);
7575 process_full_comp_unit (per_cu
, item
->pretend_language
);
7577 if (dwarf2_read_debug
>= debug_print_threshold
)
7578 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7581 item
->per_cu
->queued
= 0;
7582 next_item
= item
->next
;
7586 dwarf2_queue_tail
= NULL
;
7588 if (dwarf2_read_debug
)
7590 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7591 objfile_name (dwarf2_per_objfile
->objfile
));
7595 /* Free all allocated queue entries. This function only releases anything if
7596 an error was thrown; if the queue was processed then it would have been
7597 freed as we went along. */
7600 dwarf2_release_queue (void *dummy
)
7602 struct dwarf2_queue_item
*item
, *last
;
7604 item
= dwarf2_queue
;
7607 /* Anything still marked queued is likely to be in an
7608 inconsistent state, so discard it. */
7609 if (item
->per_cu
->queued
)
7611 if (item
->per_cu
->cu
!= NULL
)
7612 free_one_cached_comp_unit (item
->per_cu
);
7613 item
->per_cu
->queued
= 0;
7621 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7624 /* Read in full symbols for PST, and anything it depends on. */
7627 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7629 struct dwarf2_per_cu_data
*per_cu
;
7635 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7636 if (!pst
->dependencies
[i
]->readin
7637 && pst
->dependencies
[i
]->user
== NULL
)
7639 /* Inform about additional files that need to be read in. */
7642 /* FIXME: i18n: Need to make this a single string. */
7643 fputs_filtered (" ", gdb_stdout
);
7645 fputs_filtered ("and ", gdb_stdout
);
7647 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7648 wrap_here (""); /* Flush output. */
7649 gdb_flush (gdb_stdout
);
7651 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7654 per_cu
= pst
->read_symtab_private
;
7658 /* It's an include file, no symbols to read for it.
7659 Everything is in the parent symtab. */
7664 dw2_do_instantiate_symtab (per_cu
);
7667 /* Trivial hash function for die_info: the hash value of a DIE
7668 is its offset in .debug_info for this objfile. */
7671 die_hash (const void *item
)
7673 const struct die_info
*die
= item
;
7675 return die
->offset
.sect_off
;
7678 /* Trivial comparison function for die_info structures: two DIEs
7679 are equal if they have the same offset. */
7682 die_eq (const void *item_lhs
, const void *item_rhs
)
7684 const struct die_info
*die_lhs
= item_lhs
;
7685 const struct die_info
*die_rhs
= item_rhs
;
7687 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7690 /* die_reader_func for load_full_comp_unit.
7691 This is identical to read_signatured_type_reader,
7692 but is kept separate for now. */
7695 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7696 const gdb_byte
*info_ptr
,
7697 struct die_info
*comp_unit_die
,
7701 struct dwarf2_cu
*cu
= reader
->cu
;
7702 enum language
*language_ptr
= data
;
7704 gdb_assert (cu
->die_hash
== NULL
);
7706 htab_create_alloc_ex (cu
->header
.length
/ 12,
7710 &cu
->comp_unit_obstack
,
7711 hashtab_obstack_allocate
,
7712 dummy_obstack_deallocate
);
7715 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7716 &info_ptr
, comp_unit_die
);
7717 cu
->dies
= comp_unit_die
;
7718 /* comp_unit_die is not stored in die_hash, no need. */
7720 /* We try not to read any attributes in this function, because not
7721 all CUs needed for references have been loaded yet, and symbol
7722 table processing isn't initialized. But we have to set the CU language,
7723 or we won't be able to build types correctly.
7724 Similarly, if we do not read the producer, we can not apply
7725 producer-specific interpretation. */
7726 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7729 /* Load the DIEs associated with PER_CU into memory. */
7732 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7733 enum language pretend_language
)
7735 gdb_assert (! this_cu
->is_debug_types
);
7737 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7738 load_full_comp_unit_reader
, &pretend_language
);
7741 /* Add a DIE to the delayed physname list. */
7744 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7745 const char *name
, struct die_info
*die
,
7746 struct dwarf2_cu
*cu
)
7748 struct delayed_method_info mi
;
7750 mi
.fnfield_index
= fnfield_index
;
7754 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7757 /* A cleanup for freeing the delayed method list. */
7760 free_delayed_list (void *ptr
)
7762 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7763 if (cu
->method_list
!= NULL
)
7765 VEC_free (delayed_method_info
, cu
->method_list
);
7766 cu
->method_list
= NULL
;
7770 /* Compute the physnames of any methods on the CU's method list.
7772 The computation of method physnames is delayed in order to avoid the
7773 (bad) condition that one of the method's formal parameters is of an as yet
7777 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7780 struct delayed_method_info
*mi
;
7781 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7783 const char *physname
;
7784 struct fn_fieldlist
*fn_flp
7785 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7786 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7787 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
7788 = physname
? physname
: "";
7792 /* Go objects should be embedded in a DW_TAG_module DIE,
7793 and it's not clear if/how imported objects will appear.
7794 To keep Go support simple until that's worked out,
7795 go back through what we've read and create something usable.
7796 We could do this while processing each DIE, and feels kinda cleaner,
7797 but that way is more invasive.
7798 This is to, for example, allow the user to type "p var" or "b main"
7799 without having to specify the package name, and allow lookups
7800 of module.object to work in contexts that use the expression
7804 fixup_go_packaging (struct dwarf2_cu
*cu
)
7806 char *package_name
= NULL
;
7807 struct pending
*list
;
7810 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7812 for (i
= 0; i
< list
->nsyms
; ++i
)
7814 struct symbol
*sym
= list
->symbol
[i
];
7816 if (SYMBOL_LANGUAGE (sym
) == language_go
7817 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7819 char *this_package_name
= go_symbol_package_name (sym
);
7821 if (this_package_name
== NULL
)
7823 if (package_name
== NULL
)
7824 package_name
= this_package_name
;
7827 if (strcmp (package_name
, this_package_name
) != 0)
7828 complaint (&symfile_complaints
,
7829 _("Symtab %s has objects from two different Go packages: %s and %s"),
7830 (symbol_symtab (sym
) != NULL
7831 ? symtab_to_filename_for_display
7832 (symbol_symtab (sym
))
7833 : objfile_name (cu
->objfile
)),
7834 this_package_name
, package_name
);
7835 xfree (this_package_name
);
7841 if (package_name
!= NULL
)
7843 struct objfile
*objfile
= cu
->objfile
;
7844 const char *saved_package_name
7845 = obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
7847 strlen (package_name
));
7848 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
7849 saved_package_name
, objfile
);
7852 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7854 sym
= allocate_symbol (objfile
);
7855 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7856 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7857 strlen (saved_package_name
), 0, objfile
);
7858 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7859 e.g., "main" finds the "main" module and not C's main(). */
7860 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7861 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7862 SYMBOL_TYPE (sym
) = type
;
7864 add_symbol_to_list (sym
, &global_symbols
);
7866 xfree (package_name
);
7870 /* Return the symtab for PER_CU. This works properly regardless of
7871 whether we're using the index or psymtabs. */
7873 static struct compunit_symtab
*
7874 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
7876 return (dwarf2_per_objfile
->using_index
7877 ? per_cu
->v
.quick
->compunit_symtab
7878 : per_cu
->v
.psymtab
->compunit_symtab
);
7881 /* A helper function for computing the list of all symbol tables
7882 included by PER_CU. */
7885 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
7886 htab_t all_children
, htab_t all_type_symtabs
,
7887 struct dwarf2_per_cu_data
*per_cu
,
7888 struct compunit_symtab
*immediate_parent
)
7892 struct compunit_symtab
*cust
;
7893 struct dwarf2_per_cu_data
*iter
;
7895 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7898 /* This inclusion and its children have been processed. */
7903 /* Only add a CU if it has a symbol table. */
7904 cust
= get_compunit_symtab (per_cu
);
7907 /* If this is a type unit only add its symbol table if we haven't
7908 seen it yet (type unit per_cu's can share symtabs). */
7909 if (per_cu
->is_debug_types
)
7911 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
7915 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7916 if (cust
->user
== NULL
)
7917 cust
->user
= immediate_parent
;
7922 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7923 if (cust
->user
== NULL
)
7924 cust
->user
= immediate_parent
;
7929 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7932 recursively_compute_inclusions (result
, all_children
,
7933 all_type_symtabs
, iter
, cust
);
7937 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
7941 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7943 gdb_assert (! per_cu
->is_debug_types
);
7945 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7948 struct dwarf2_per_cu_data
*per_cu_iter
;
7949 struct compunit_symtab
*compunit_symtab_iter
;
7950 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
7951 htab_t all_children
, all_type_symtabs
;
7952 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
7954 /* If we don't have a symtab, we can just skip this case. */
7958 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7959 NULL
, xcalloc
, xfree
);
7960 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7961 NULL
, xcalloc
, xfree
);
7964 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7968 recursively_compute_inclusions (&result_symtabs
, all_children
,
7969 all_type_symtabs
, per_cu_iter
,
7973 /* Now we have a transitive closure of all the included symtabs. */
7974 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
7976 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7977 (len
+ 1) * sizeof (struct symtab
*));
7979 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
7980 compunit_symtab_iter
);
7982 cust
->includes
[ix
] = compunit_symtab_iter
;
7983 cust
->includes
[len
] = NULL
;
7985 VEC_free (compunit_symtab_ptr
, result_symtabs
);
7986 htab_delete (all_children
);
7987 htab_delete (all_type_symtabs
);
7991 /* Compute the 'includes' field for the symtabs of all the CUs we just
7995 process_cu_includes (void)
7998 struct dwarf2_per_cu_data
*iter
;
8001 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
8005 if (! iter
->is_debug_types
)
8006 compute_compunit_symtab_includes (iter
);
8009 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
8012 /* Generate full symbol information for PER_CU, whose DIEs have
8013 already been loaded into memory. */
8016 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8017 enum language pretend_language
)
8019 struct dwarf2_cu
*cu
= per_cu
->cu
;
8020 struct objfile
*objfile
= per_cu
->objfile
;
8021 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8022 CORE_ADDR lowpc
, highpc
;
8023 struct compunit_symtab
*cust
;
8024 struct cleanup
*back_to
, *delayed_list_cleanup
;
8026 struct block
*static_block
;
8029 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8032 back_to
= make_cleanup (really_free_pendings
, NULL
);
8033 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8035 cu
->list_in_scope
= &file_symbols
;
8037 cu
->language
= pretend_language
;
8038 cu
->language_defn
= language_def (cu
->language
);
8040 /* Do line number decoding in read_file_scope () */
8041 process_die (cu
->dies
, cu
);
8043 /* For now fudge the Go package. */
8044 if (cu
->language
== language_go
)
8045 fixup_go_packaging (cu
);
8047 /* Now that we have processed all the DIEs in the CU, all the types
8048 should be complete, and it should now be safe to compute all of the
8050 compute_delayed_physnames (cu
);
8051 do_cleanups (delayed_list_cleanup
);
8053 /* Some compilers don't define a DW_AT_high_pc attribute for the
8054 compilation unit. If the DW_AT_high_pc is missing, synthesize
8055 it, by scanning the DIE's below the compilation unit. */
8056 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8058 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8059 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8061 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8062 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8063 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8064 addrmap to help ensure it has an accurate map of pc values belonging to
8066 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8068 cust
= end_symtab_from_static_block (static_block
,
8069 SECT_OFF_TEXT (objfile
), 0);
8073 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8075 /* Set symtab language to language from DW_AT_language. If the
8076 compilation is from a C file generated by language preprocessors, do
8077 not set the language if it was already deduced by start_subfile. */
8078 if (!(cu
->language
== language_c
8079 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8080 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8082 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8083 produce DW_AT_location with location lists but it can be possibly
8084 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8085 there were bugs in prologue debug info, fixed later in GCC-4.5
8086 by "unwind info for epilogues" patch (which is not directly related).
8088 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8089 needed, it would be wrong due to missing DW_AT_producer there.
8091 Still one can confuse GDB by using non-standard GCC compilation
8092 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8094 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8095 cust
->locations_valid
= 1;
8097 if (gcc_4_minor
>= 5)
8098 cust
->epilogue_unwind_valid
= 1;
8100 cust
->call_site_htab
= cu
->call_site_htab
;
8103 if (dwarf2_per_objfile
->using_index
)
8104 per_cu
->v
.quick
->compunit_symtab
= cust
;
8107 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8108 pst
->compunit_symtab
= cust
;
8112 /* Push it for inclusion processing later. */
8113 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8115 do_cleanups (back_to
);
8118 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8119 already been loaded into memory. */
8122 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8123 enum language pretend_language
)
8125 struct dwarf2_cu
*cu
= per_cu
->cu
;
8126 struct objfile
*objfile
= per_cu
->objfile
;
8127 struct compunit_symtab
*cust
;
8128 struct cleanup
*back_to
, *delayed_list_cleanup
;
8129 struct signatured_type
*sig_type
;
8131 gdb_assert (per_cu
->is_debug_types
);
8132 sig_type
= (struct signatured_type
*) per_cu
;
8135 back_to
= make_cleanup (really_free_pendings
, NULL
);
8136 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8138 cu
->list_in_scope
= &file_symbols
;
8140 cu
->language
= pretend_language
;
8141 cu
->language_defn
= language_def (cu
->language
);
8143 /* The symbol tables are set up in read_type_unit_scope. */
8144 process_die (cu
->dies
, cu
);
8146 /* For now fudge the Go package. */
8147 if (cu
->language
== language_go
)
8148 fixup_go_packaging (cu
);
8150 /* Now that we have processed all the DIEs in the CU, all the types
8151 should be complete, and it should now be safe to compute all of the
8153 compute_delayed_physnames (cu
);
8154 do_cleanups (delayed_list_cleanup
);
8156 /* TUs share symbol tables.
8157 If this is the first TU to use this symtab, complete the construction
8158 of it with end_expandable_symtab. Otherwise, complete the addition of
8159 this TU's symbols to the existing symtab. */
8160 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8162 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8163 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8167 /* Set symtab language to language from DW_AT_language. If the
8168 compilation is from a C file generated by language preprocessors,
8169 do not set the language if it was already deduced by
8171 if (!(cu
->language
== language_c
8172 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8173 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8178 augment_type_symtab ();
8179 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8182 if (dwarf2_per_objfile
->using_index
)
8183 per_cu
->v
.quick
->compunit_symtab
= cust
;
8186 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8187 pst
->compunit_symtab
= cust
;
8191 do_cleanups (back_to
);
8194 /* Process an imported unit DIE. */
8197 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8199 struct attribute
*attr
;
8201 /* For now we don't handle imported units in type units. */
8202 if (cu
->per_cu
->is_debug_types
)
8204 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8205 " supported in type units [in module %s]"),
8206 objfile_name (cu
->objfile
));
8209 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8212 struct dwarf2_per_cu_data
*per_cu
;
8213 struct symtab
*imported_symtab
;
8217 offset
= dwarf2_get_ref_die_offset (attr
);
8218 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8219 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8221 /* If necessary, add it to the queue and load its DIEs. */
8222 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8223 load_full_comp_unit (per_cu
, cu
->language
);
8225 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8230 /* Reset the in_process bit of a die. */
8233 reset_die_in_process (void *arg
)
8235 struct die_info
*die
= arg
;
8237 die
->in_process
= 0;
8240 /* Process a die and its children. */
8243 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8245 struct cleanup
*in_process
;
8247 /* We should only be processing those not already in process. */
8248 gdb_assert (!die
->in_process
);
8250 die
->in_process
= 1;
8251 in_process
= make_cleanup (reset_die_in_process
,die
);
8255 case DW_TAG_padding
:
8257 case DW_TAG_compile_unit
:
8258 case DW_TAG_partial_unit
:
8259 read_file_scope (die
, cu
);
8261 case DW_TAG_type_unit
:
8262 read_type_unit_scope (die
, cu
);
8264 case DW_TAG_subprogram
:
8265 case DW_TAG_inlined_subroutine
:
8266 read_func_scope (die
, cu
);
8268 case DW_TAG_lexical_block
:
8269 case DW_TAG_try_block
:
8270 case DW_TAG_catch_block
:
8271 read_lexical_block_scope (die
, cu
);
8273 case DW_TAG_GNU_call_site
:
8274 read_call_site_scope (die
, cu
);
8276 case DW_TAG_class_type
:
8277 case DW_TAG_interface_type
:
8278 case DW_TAG_structure_type
:
8279 case DW_TAG_union_type
:
8280 process_structure_scope (die
, cu
);
8282 case DW_TAG_enumeration_type
:
8283 process_enumeration_scope (die
, cu
);
8286 /* These dies have a type, but processing them does not create
8287 a symbol or recurse to process the children. Therefore we can
8288 read them on-demand through read_type_die. */
8289 case DW_TAG_subroutine_type
:
8290 case DW_TAG_set_type
:
8291 case DW_TAG_array_type
:
8292 case DW_TAG_pointer_type
:
8293 case DW_TAG_ptr_to_member_type
:
8294 case DW_TAG_reference_type
:
8295 case DW_TAG_string_type
:
8298 case DW_TAG_base_type
:
8299 case DW_TAG_subrange_type
:
8300 case DW_TAG_typedef
:
8301 /* Add a typedef symbol for the type definition, if it has a
8303 new_symbol (die
, read_type_die (die
, cu
), cu
);
8305 case DW_TAG_common_block
:
8306 read_common_block (die
, cu
);
8308 case DW_TAG_common_inclusion
:
8310 case DW_TAG_namespace
:
8311 cu
->processing_has_namespace_info
= 1;
8312 read_namespace (die
, cu
);
8315 cu
->processing_has_namespace_info
= 1;
8316 read_module (die
, cu
);
8318 case DW_TAG_imported_declaration
:
8319 cu
->processing_has_namespace_info
= 1;
8320 if (read_namespace_alias (die
, cu
))
8322 /* The declaration is not a global namespace alias: fall through. */
8323 case DW_TAG_imported_module
:
8324 cu
->processing_has_namespace_info
= 1;
8325 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8326 || cu
->language
!= language_fortran
))
8327 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8328 dwarf_tag_name (die
->tag
));
8329 read_import_statement (die
, cu
);
8332 case DW_TAG_imported_unit
:
8333 process_imported_unit_die (die
, cu
);
8337 new_symbol (die
, NULL
, cu
);
8341 do_cleanups (in_process
);
8344 /* DWARF name computation. */
8346 /* A helper function for dwarf2_compute_name which determines whether DIE
8347 needs to have the name of the scope prepended to the name listed in the
8351 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8353 struct attribute
*attr
;
8357 case DW_TAG_namespace
:
8358 case DW_TAG_typedef
:
8359 case DW_TAG_class_type
:
8360 case DW_TAG_interface_type
:
8361 case DW_TAG_structure_type
:
8362 case DW_TAG_union_type
:
8363 case DW_TAG_enumeration_type
:
8364 case DW_TAG_enumerator
:
8365 case DW_TAG_subprogram
:
8366 case DW_TAG_inlined_subroutine
:
8368 case DW_TAG_imported_declaration
:
8371 case DW_TAG_variable
:
8372 case DW_TAG_constant
:
8373 /* We only need to prefix "globally" visible variables. These include
8374 any variable marked with DW_AT_external or any variable that
8375 lives in a namespace. [Variables in anonymous namespaces
8376 require prefixing, but they are not DW_AT_external.] */
8378 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8380 struct dwarf2_cu
*spec_cu
= cu
;
8382 return die_needs_namespace (die_specification (die
, &spec_cu
),
8386 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8387 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8388 && die
->parent
->tag
!= DW_TAG_module
)
8390 /* A variable in a lexical block of some kind does not need a
8391 namespace, even though in C++ such variables may be external
8392 and have a mangled name. */
8393 if (die
->parent
->tag
== DW_TAG_lexical_block
8394 || die
->parent
->tag
== DW_TAG_try_block
8395 || die
->parent
->tag
== DW_TAG_catch_block
8396 || die
->parent
->tag
== DW_TAG_subprogram
)
8405 /* Retrieve the last character from a mem_file. */
8408 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
8410 char *last_char_p
= (char *) object
;
8413 *last_char_p
= buffer
[length
- 1];
8416 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8417 compute the physname for the object, which include a method's:
8418 - formal parameters (C++/Java),
8419 - receiver type (Go),
8420 - return type (Java).
8422 The term "physname" is a bit confusing.
8423 For C++, for example, it is the demangled name.
8424 For Go, for example, it's the mangled name.
8426 For Ada, return the DIE's linkage name rather than the fully qualified
8427 name. PHYSNAME is ignored..
8429 The result is allocated on the objfile_obstack and canonicalized. */
8432 dwarf2_compute_name (const char *name
,
8433 struct die_info
*die
, struct dwarf2_cu
*cu
,
8436 struct objfile
*objfile
= cu
->objfile
;
8439 name
= dwarf2_name (die
, cu
);
8441 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
8442 compute it by typename_concat inside GDB. */
8443 if (cu
->language
== language_ada
8444 || (cu
->language
== language_fortran
&& physname
))
8446 /* For Ada unit, we prefer the linkage name over the name, as
8447 the former contains the exported name, which the user expects
8448 to be able to reference. Ideally, we want the user to be able
8449 to reference this entity using either natural or linkage name,
8450 but we haven't started looking at this enhancement yet. */
8451 struct attribute
*attr
;
8453 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8455 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8456 if (attr
&& DW_STRING (attr
))
8457 return DW_STRING (attr
);
8460 /* These are the only languages we know how to qualify names in. */
8462 && (cu
->language
== language_cplus
|| cu
->language
== language_java
8463 || cu
->language
== language_fortran
))
8465 if (die_needs_namespace (die
, cu
))
8469 struct ui_file
*buf
;
8470 char *intermediate_name
;
8471 const char *canonical_name
= NULL
;
8473 prefix
= determine_prefix (die
, cu
);
8474 buf
= mem_fileopen ();
8475 if (*prefix
!= '\0')
8477 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8480 fputs_unfiltered (prefixed_name
, buf
);
8481 xfree (prefixed_name
);
8484 fputs_unfiltered (name
, buf
);
8486 /* Template parameters may be specified in the DIE's DW_AT_name, or
8487 as children with DW_TAG_template_type_param or
8488 DW_TAG_value_type_param. If the latter, add them to the name
8489 here. If the name already has template parameters, then
8490 skip this step; some versions of GCC emit both, and
8491 it is more efficient to use the pre-computed name.
8493 Something to keep in mind about this process: it is very
8494 unlikely, or in some cases downright impossible, to produce
8495 something that will match the mangled name of a function.
8496 If the definition of the function has the same debug info,
8497 we should be able to match up with it anyway. But fallbacks
8498 using the minimal symbol, for instance to find a method
8499 implemented in a stripped copy of libstdc++, will not work.
8500 If we do not have debug info for the definition, we will have to
8501 match them up some other way.
8503 When we do name matching there is a related problem with function
8504 templates; two instantiated function templates are allowed to
8505 differ only by their return types, which we do not add here. */
8507 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8509 struct attribute
*attr
;
8510 struct die_info
*child
;
8513 die
->building_fullname
= 1;
8515 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8519 const gdb_byte
*bytes
;
8520 struct dwarf2_locexpr_baton
*baton
;
8523 if (child
->tag
!= DW_TAG_template_type_param
8524 && child
->tag
!= DW_TAG_template_value_param
)
8529 fputs_unfiltered ("<", buf
);
8533 fputs_unfiltered (", ", buf
);
8535 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8538 complaint (&symfile_complaints
,
8539 _("template parameter missing DW_AT_type"));
8540 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
8543 type
= die_type (child
, cu
);
8545 if (child
->tag
== DW_TAG_template_type_param
)
8547 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
8551 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8554 complaint (&symfile_complaints
,
8555 _("template parameter missing "
8556 "DW_AT_const_value"));
8557 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
8561 dwarf2_const_value_attr (attr
, type
, name
,
8562 &cu
->comp_unit_obstack
, cu
,
8563 &value
, &bytes
, &baton
);
8565 if (TYPE_NOSIGN (type
))
8566 /* GDB prints characters as NUMBER 'CHAR'. If that's
8567 changed, this can use value_print instead. */
8568 c_printchar (value
, type
, buf
);
8571 struct value_print_options opts
;
8574 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8578 else if (bytes
!= NULL
)
8580 v
= allocate_value (type
);
8581 memcpy (value_contents_writeable (v
), bytes
,
8582 TYPE_LENGTH (type
));
8585 v
= value_from_longest (type
, value
);
8587 /* Specify decimal so that we do not depend on
8589 get_formatted_print_options (&opts
, 'd');
8591 value_print (v
, buf
, &opts
);
8597 die
->building_fullname
= 0;
8601 /* Close the argument list, with a space if necessary
8602 (nested templates). */
8603 char last_char
= '\0';
8604 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
8605 if (last_char
== '>')
8606 fputs_unfiltered (" >", buf
);
8608 fputs_unfiltered (">", buf
);
8612 /* For Java and C++ methods, append formal parameter type
8613 information, if PHYSNAME. */
8615 if (physname
&& die
->tag
== DW_TAG_subprogram
8616 && (cu
->language
== language_cplus
8617 || cu
->language
== language_java
))
8619 struct type
*type
= read_type_die (die
, cu
);
8621 c_type_print_args (type
, buf
, 1, cu
->language
,
8622 &type_print_raw_options
);
8624 if (cu
->language
== language_java
)
8626 /* For java, we must append the return type to method
8628 if (die
->tag
== DW_TAG_subprogram
)
8629 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
8630 0, 0, &type_print_raw_options
);
8632 else if (cu
->language
== language_cplus
)
8634 /* Assume that an artificial first parameter is
8635 "this", but do not crash if it is not. RealView
8636 marks unnamed (and thus unused) parameters as
8637 artificial; there is no way to differentiate
8639 if (TYPE_NFIELDS (type
) > 0
8640 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8641 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8642 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8644 fputs_unfiltered (" const", buf
);
8648 intermediate_name
= ui_file_xstrdup (buf
, &length
);
8649 ui_file_delete (buf
);
8651 if (cu
->language
== language_cplus
)
8653 = dwarf2_canonicalize_name (intermediate_name
, cu
,
8654 &objfile
->per_bfd
->storage_obstack
);
8656 /* If we only computed INTERMEDIATE_NAME, or if
8657 INTERMEDIATE_NAME is already canonical, then we need to
8658 copy it to the appropriate obstack. */
8659 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
)
8660 name
= obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8662 strlen (intermediate_name
));
8664 name
= canonical_name
;
8666 xfree (intermediate_name
);
8673 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8674 If scope qualifiers are appropriate they will be added. The result
8675 will be allocated on the storage_obstack, or NULL if the DIE does
8676 not have a name. NAME may either be from a previous call to
8677 dwarf2_name or NULL.
8679 The output string will be canonicalized (if C++/Java). */
8682 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8684 return dwarf2_compute_name (name
, die
, cu
, 0);
8687 /* Construct a physname for the given DIE in CU. NAME may either be
8688 from a previous call to dwarf2_name or NULL. The result will be
8689 allocated on the objfile_objstack or NULL if the DIE does not have a
8692 The output string will be canonicalized (if C++/Java). */
8695 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8697 struct objfile
*objfile
= cu
->objfile
;
8698 struct attribute
*attr
;
8699 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8700 struct cleanup
*back_to
;
8703 /* In this case dwarf2_compute_name is just a shortcut not building anything
8705 if (!die_needs_namespace (die
, cu
))
8706 return dwarf2_compute_name (name
, die
, cu
, 1);
8708 back_to
= make_cleanup (null_cleanup
, NULL
);
8710 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8712 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8714 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8716 if (attr
&& DW_STRING (attr
))
8720 mangled
= DW_STRING (attr
);
8722 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8723 type. It is easier for GDB users to search for such functions as
8724 `name(params)' than `long name(params)'. In such case the minimal
8725 symbol names do not match the full symbol names but for template
8726 functions there is never a need to look up their definition from their
8727 declaration so the only disadvantage remains the minimal symbol
8728 variant `long name(params)' does not have the proper inferior type.
8731 if (cu
->language
== language_go
)
8733 /* This is a lie, but we already lie to the caller new_symbol_full.
8734 new_symbol_full assumes we return the mangled name.
8735 This just undoes that lie until things are cleaned up. */
8740 demangled
= gdb_demangle (mangled
,
8741 (DMGL_PARAMS
| DMGL_ANSI
8742 | (cu
->language
== language_java
8743 ? DMGL_JAVA
| DMGL_RET_POSTFIX
8748 make_cleanup (xfree
, demangled
);
8758 if (canon
== NULL
|| check_physname
)
8760 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8762 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8764 /* It may not mean a bug in GDB. The compiler could also
8765 compute DW_AT_linkage_name incorrectly. But in such case
8766 GDB would need to be bug-to-bug compatible. */
8768 complaint (&symfile_complaints
,
8769 _("Computed physname <%s> does not match demangled <%s> "
8770 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8771 physname
, canon
, mangled
, die
->offset
.sect_off
,
8772 objfile_name (objfile
));
8774 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8775 is available here - over computed PHYSNAME. It is safer
8776 against both buggy GDB and buggy compilers. */
8790 retval
= obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8791 retval
, strlen (retval
));
8793 do_cleanups (back_to
);
8797 /* Inspect DIE in CU for a namespace alias. If one exists, record
8798 a new symbol for it.
8800 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8803 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8805 struct attribute
*attr
;
8807 /* If the die does not have a name, this is not a namespace
8809 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8813 struct die_info
*d
= die
;
8814 struct dwarf2_cu
*imported_cu
= cu
;
8816 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8817 keep inspecting DIEs until we hit the underlying import. */
8818 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8819 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8821 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8825 d
= follow_die_ref (d
, attr
, &imported_cu
);
8826 if (d
->tag
!= DW_TAG_imported_declaration
)
8830 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8832 complaint (&symfile_complaints
,
8833 _("DIE at 0x%x has too many recursively imported "
8834 "declarations"), d
->offset
.sect_off
);
8841 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8843 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8844 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8846 /* This declaration is a global namespace alias. Add
8847 a symbol for it whose type is the aliased namespace. */
8848 new_symbol (die
, type
, cu
);
8857 /* Read the import statement specified by the given die and record it. */
8860 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8862 struct objfile
*objfile
= cu
->objfile
;
8863 struct attribute
*import_attr
;
8864 struct die_info
*imported_die
, *child_die
;
8865 struct dwarf2_cu
*imported_cu
;
8866 const char *imported_name
;
8867 const char *imported_name_prefix
;
8868 const char *canonical_name
;
8869 const char *import_alias
;
8870 const char *imported_declaration
= NULL
;
8871 const char *import_prefix
;
8872 VEC (const_char_ptr
) *excludes
= NULL
;
8873 struct cleanup
*cleanups
;
8875 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8876 if (import_attr
== NULL
)
8878 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8879 dwarf_tag_name (die
->tag
));
8884 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8885 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8886 if (imported_name
== NULL
)
8888 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8890 The import in the following code:
8904 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8905 <52> DW_AT_decl_file : 1
8906 <53> DW_AT_decl_line : 6
8907 <54> DW_AT_import : <0x75>
8908 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8910 <5b> DW_AT_decl_file : 1
8911 <5c> DW_AT_decl_line : 2
8912 <5d> DW_AT_type : <0x6e>
8914 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8915 <76> DW_AT_byte_size : 4
8916 <77> DW_AT_encoding : 5 (signed)
8918 imports the wrong die ( 0x75 instead of 0x58 ).
8919 This case will be ignored until the gcc bug is fixed. */
8923 /* Figure out the local name after import. */
8924 import_alias
= dwarf2_name (die
, cu
);
8926 /* Figure out where the statement is being imported to. */
8927 import_prefix
= determine_prefix (die
, cu
);
8929 /* Figure out what the scope of the imported die is and prepend it
8930 to the name of the imported die. */
8931 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8933 if (imported_die
->tag
!= DW_TAG_namespace
8934 && imported_die
->tag
!= DW_TAG_module
)
8936 imported_declaration
= imported_name
;
8937 canonical_name
= imported_name_prefix
;
8939 else if (strlen (imported_name_prefix
) > 0)
8940 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8941 imported_name_prefix
, "::", imported_name
,
8944 canonical_name
= imported_name
;
8946 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8948 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8949 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8950 child_die
= sibling_die (child_die
))
8952 /* DWARF-4: A Fortran use statement with a “rename list” may be
8953 represented by an imported module entry with an import attribute
8954 referring to the module and owned entries corresponding to those
8955 entities that are renamed as part of being imported. */
8957 if (child_die
->tag
!= DW_TAG_imported_declaration
)
8959 complaint (&symfile_complaints
,
8960 _("child DW_TAG_imported_declaration expected "
8961 "- DIE at 0x%x [in module %s]"),
8962 child_die
->offset
.sect_off
, objfile_name (objfile
));
8966 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
8967 if (import_attr
== NULL
)
8969 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8970 dwarf_tag_name (child_die
->tag
));
8975 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
8977 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8978 if (imported_name
== NULL
)
8980 complaint (&symfile_complaints
,
8981 _("child DW_TAG_imported_declaration has unknown "
8982 "imported name - DIE at 0x%x [in module %s]"),
8983 child_die
->offset
.sect_off
, objfile_name (objfile
));
8987 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
8989 process_die (child_die
, cu
);
8992 cp_add_using_directive (import_prefix
,
8995 imported_declaration
,
8998 &objfile
->objfile_obstack
);
9000 do_cleanups (cleanups
);
9003 /* Cleanup function for handle_DW_AT_stmt_list. */
9006 free_cu_line_header (void *arg
)
9008 struct dwarf2_cu
*cu
= arg
;
9010 free_line_header (cu
->line_header
);
9011 cu
->line_header
= NULL
;
9014 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
9015 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
9016 this, it was first present in GCC release 4.3.0. */
9019 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9021 if (!cu
->checked_producer
)
9022 check_producer (cu
);
9024 return cu
->producer_is_gcc_lt_4_3
;
9028 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
9029 const char **name
, const char **comp_dir
)
9031 struct attribute
*attr
;
9036 /* Find the filename. Do not use dwarf2_name here, since the filename
9037 is not a source language identifier. */
9038 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9041 *name
= DW_STRING (attr
);
9044 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
9046 *comp_dir
= DW_STRING (attr
);
9047 else if (producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
9048 && IS_ABSOLUTE_PATH (*name
))
9050 char *d
= ldirname (*name
);
9054 make_cleanup (xfree
, d
);
9056 if (*comp_dir
!= NULL
)
9058 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9059 directory, get rid of it. */
9060 char *cp
= strchr (*comp_dir
, ':');
9062 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9067 *name
= "<unknown>";
9070 /* Handle DW_AT_stmt_list for a compilation unit.
9071 DIE is the DW_TAG_compile_unit die for CU.
9072 COMP_DIR is the compilation directory. LOWPC is passed to
9073 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9076 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9077 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9079 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9080 struct attribute
*attr
;
9081 unsigned int line_offset
;
9082 struct line_header line_header_local
;
9083 hashval_t line_header_local_hash
;
9088 gdb_assert (! cu
->per_cu
->is_debug_types
);
9090 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9094 line_offset
= DW_UNSND (attr
);
9096 /* The line header hash table is only created if needed (it exists to
9097 prevent redundant reading of the line table for partial_units).
9098 If we're given a partial_unit, we'll need it. If we're given a
9099 compile_unit, then use the line header hash table if it's already
9100 created, but don't create one just yet. */
9102 if (dwarf2_per_objfile
->line_header_hash
== NULL
9103 && die
->tag
== DW_TAG_partial_unit
)
9105 dwarf2_per_objfile
->line_header_hash
9106 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9107 line_header_eq_voidp
,
9108 free_line_header_voidp
,
9109 &objfile
->objfile_obstack
,
9110 hashtab_obstack_allocate
,
9111 dummy_obstack_deallocate
);
9114 line_header_local
.offset
.sect_off
= line_offset
;
9115 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9116 line_header_local_hash
= line_header_hash (&line_header_local
);
9117 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9119 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9121 line_header_local_hash
, NO_INSERT
);
9123 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9124 is not present in *SLOT (since if there is something in *SLOT then
9125 it will be for a partial_unit). */
9126 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9128 gdb_assert (*slot
!= NULL
);
9129 cu
->line_header
= *slot
;
9134 /* dwarf_decode_line_header does not yet provide sufficient information.
9135 We always have to call also dwarf_decode_lines for it. */
9136 cu
->line_header
= dwarf_decode_line_header (line_offset
, cu
);
9137 if (cu
->line_header
== NULL
)
9140 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9144 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9146 line_header_local_hash
, INSERT
);
9147 gdb_assert (slot
!= NULL
);
9149 if (slot
!= NULL
&& *slot
== NULL
)
9151 /* This newly decoded line number information unit will be owned
9152 by line_header_hash hash table. */
9153 *slot
= cu
->line_header
;
9157 /* We cannot free any current entry in (*slot) as that struct line_header
9158 may be already used by multiple CUs. Create only temporary decoded
9159 line_header for this CU - it may happen at most once for each line
9160 number information unit. And if we're not using line_header_hash
9161 then this is what we want as well. */
9162 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9163 make_cleanup (free_cu_line_header
, cu
);
9165 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9166 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9170 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9173 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9175 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9176 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9177 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9178 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9179 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9180 struct attribute
*attr
;
9181 const char *name
= NULL
;
9182 const char *comp_dir
= NULL
;
9183 struct die_info
*child_die
;
9184 bfd
*abfd
= objfile
->obfd
;
9187 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9189 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9191 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9192 from finish_block. */
9193 if (lowpc
== ((CORE_ADDR
) -1))
9195 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9197 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
9199 prepare_one_comp_unit (cu
, die
, cu
->language
);
9201 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9202 standardised yet. As a workaround for the language detection we fall
9203 back to the DW_AT_producer string. */
9204 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9205 cu
->language
= language_opencl
;
9207 /* Similar hack for Go. */
9208 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9209 set_cu_language (DW_LANG_Go
, cu
);
9211 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
9213 /* Decode line number information if present. We do this before
9214 processing child DIEs, so that the line header table is available
9215 for DW_AT_decl_file. */
9216 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, lowpc
);
9218 /* Process all dies in compilation unit. */
9219 if (die
->child
!= NULL
)
9221 child_die
= die
->child
;
9222 while (child_die
&& child_die
->tag
)
9224 process_die (child_die
, cu
);
9225 child_die
= sibling_die (child_die
);
9229 /* Decode macro information, if present. Dwarf 2 macro information
9230 refers to information in the line number info statement program
9231 header, so we can only read it if we've read the header
9233 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9234 if (attr
&& cu
->line_header
)
9236 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9237 complaint (&symfile_complaints
,
9238 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9240 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9244 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9245 if (attr
&& cu
->line_header
)
9247 unsigned int macro_offset
= DW_UNSND (attr
);
9249 dwarf_decode_macros (cu
, macro_offset
, 0);
9253 do_cleanups (back_to
);
9256 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9257 Create the set of symtabs used by this TU, or if this TU is sharing
9258 symtabs with another TU and the symtabs have already been created
9259 then restore those symtabs in the line header.
9260 We don't need the pc/line-number mapping for type units. */
9263 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9265 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9266 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9267 struct type_unit_group
*tu_group
;
9269 struct line_header
*lh
;
9270 struct attribute
*attr
;
9271 unsigned int i
, line_offset
;
9272 struct signatured_type
*sig_type
;
9274 gdb_assert (per_cu
->is_debug_types
);
9275 sig_type
= (struct signatured_type
*) per_cu
;
9277 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9279 /* If we're using .gdb_index (includes -readnow) then
9280 per_cu->type_unit_group may not have been set up yet. */
9281 if (sig_type
->type_unit_group
== NULL
)
9282 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9283 tu_group
= sig_type
->type_unit_group
;
9285 /* If we've already processed this stmt_list there's no real need to
9286 do it again, we could fake it and just recreate the part we need
9287 (file name,index -> symtab mapping). If data shows this optimization
9288 is useful we can do it then. */
9289 first_time
= tu_group
->compunit_symtab
== NULL
;
9291 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9296 line_offset
= DW_UNSND (attr
);
9297 lh
= dwarf_decode_line_header (line_offset
, cu
);
9302 dwarf2_start_symtab (cu
, "", NULL
, 0);
9305 gdb_assert (tu_group
->symtabs
== NULL
);
9306 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9311 cu
->line_header
= lh
;
9312 make_cleanup (free_cu_line_header
, cu
);
9316 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9318 tu_group
->num_symtabs
= lh
->num_file_names
;
9319 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9321 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9323 const char *dir
= NULL
;
9324 struct file_entry
*fe
= &lh
->file_names
[i
];
9326 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
9327 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9328 dwarf2_start_subfile (fe
->name
, dir
);
9330 if (current_subfile
->symtab
== NULL
)
9332 /* NOTE: start_subfile will recognize when it's been passed
9333 a file it has already seen. So we can't assume there's a
9334 simple mapping from lh->file_names to subfiles, plus
9335 lh->file_names may contain dups. */
9336 current_subfile
->symtab
9337 = allocate_symtab (cust
, current_subfile
->name
);
9340 fe
->symtab
= current_subfile
->symtab
;
9341 tu_group
->symtabs
[i
] = fe
->symtab
;
9346 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9348 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9350 struct file_entry
*fe
= &lh
->file_names
[i
];
9352 fe
->symtab
= tu_group
->symtabs
[i
];
9356 /* The main symtab is allocated last. Type units don't have DW_AT_name
9357 so they don't have a "real" (so to speak) symtab anyway.
9358 There is later code that will assign the main symtab to all symbols
9359 that don't have one. We need to handle the case of a symbol with a
9360 missing symtab (DW_AT_decl_file) anyway. */
9363 /* Process DW_TAG_type_unit.
9364 For TUs we want to skip the first top level sibling if it's not the
9365 actual type being defined by this TU. In this case the first top
9366 level sibling is there to provide context only. */
9369 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9371 struct die_info
*child_die
;
9373 prepare_one_comp_unit (cu
, die
, language_minimal
);
9375 /* Initialize (or reinitialize) the machinery for building symtabs.
9376 We do this before processing child DIEs, so that the line header table
9377 is available for DW_AT_decl_file. */
9378 setup_type_unit_groups (die
, cu
);
9380 if (die
->child
!= NULL
)
9382 child_die
= die
->child
;
9383 while (child_die
&& child_die
->tag
)
9385 process_die (child_die
, cu
);
9386 child_die
= sibling_die (child_die
);
9393 http://gcc.gnu.org/wiki/DebugFission
9394 http://gcc.gnu.org/wiki/DebugFissionDWP
9396 To simplify handling of both DWO files ("object" files with the DWARF info)
9397 and DWP files (a file with the DWOs packaged up into one file), we treat
9398 DWP files as having a collection of virtual DWO files. */
9401 hash_dwo_file (const void *item
)
9403 const struct dwo_file
*dwo_file
= item
;
9406 hash
= htab_hash_string (dwo_file
->dwo_name
);
9407 if (dwo_file
->comp_dir
!= NULL
)
9408 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9413 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9415 const struct dwo_file
*lhs
= item_lhs
;
9416 const struct dwo_file
*rhs
= item_rhs
;
9418 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9420 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9421 return lhs
->comp_dir
== rhs
->comp_dir
;
9422 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9425 /* Allocate a hash table for DWO files. */
9428 allocate_dwo_file_hash_table (void)
9430 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9432 return htab_create_alloc_ex (41,
9436 &objfile
->objfile_obstack
,
9437 hashtab_obstack_allocate
,
9438 dummy_obstack_deallocate
);
9441 /* Lookup DWO file DWO_NAME. */
9444 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9446 struct dwo_file find_entry
;
9449 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9450 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9452 memset (&find_entry
, 0, sizeof (find_entry
));
9453 find_entry
.dwo_name
= dwo_name
;
9454 find_entry
.comp_dir
= comp_dir
;
9455 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9461 hash_dwo_unit (const void *item
)
9463 const struct dwo_unit
*dwo_unit
= item
;
9465 /* This drops the top 32 bits of the id, but is ok for a hash. */
9466 return dwo_unit
->signature
;
9470 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9472 const struct dwo_unit
*lhs
= item_lhs
;
9473 const struct dwo_unit
*rhs
= item_rhs
;
9475 /* The signature is assumed to be unique within the DWO file.
9476 So while object file CU dwo_id's always have the value zero,
9477 that's OK, assuming each object file DWO file has only one CU,
9478 and that's the rule for now. */
9479 return lhs
->signature
== rhs
->signature
;
9482 /* Allocate a hash table for DWO CUs,TUs.
9483 There is one of these tables for each of CUs,TUs for each DWO file. */
9486 allocate_dwo_unit_table (struct objfile
*objfile
)
9488 /* Start out with a pretty small number.
9489 Generally DWO files contain only one CU and maybe some TUs. */
9490 return htab_create_alloc_ex (3,
9494 &objfile
->objfile_obstack
,
9495 hashtab_obstack_allocate
,
9496 dummy_obstack_deallocate
);
9499 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9501 struct create_dwo_cu_data
9503 struct dwo_file
*dwo_file
;
9504 struct dwo_unit dwo_unit
;
9507 /* die_reader_func for create_dwo_cu. */
9510 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9511 const gdb_byte
*info_ptr
,
9512 struct die_info
*comp_unit_die
,
9516 struct dwarf2_cu
*cu
= reader
->cu
;
9517 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9518 sect_offset offset
= cu
->per_cu
->offset
;
9519 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9520 struct create_dwo_cu_data
*data
= datap
;
9521 struct dwo_file
*dwo_file
= data
->dwo_file
;
9522 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9523 struct attribute
*attr
;
9525 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9528 complaint (&symfile_complaints
,
9529 _("Dwarf Error: debug entry at offset 0x%x is missing"
9530 " its dwo_id [in module %s]"),
9531 offset
.sect_off
, dwo_file
->dwo_name
);
9535 dwo_unit
->dwo_file
= dwo_file
;
9536 dwo_unit
->signature
= DW_UNSND (attr
);
9537 dwo_unit
->section
= section
;
9538 dwo_unit
->offset
= offset
;
9539 dwo_unit
->length
= cu
->per_cu
->length
;
9541 if (dwarf2_read_debug
)
9542 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9543 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9546 /* Create the dwo_unit for the lone CU in DWO_FILE.
9547 Note: This function processes DWO files only, not DWP files. */
9549 static struct dwo_unit
*
9550 create_dwo_cu (struct dwo_file
*dwo_file
)
9552 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9553 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9556 const gdb_byte
*info_ptr
, *end_ptr
;
9557 struct create_dwo_cu_data create_dwo_cu_data
;
9558 struct dwo_unit
*dwo_unit
;
9560 dwarf2_read_section (objfile
, section
);
9561 info_ptr
= section
->buffer
;
9563 if (info_ptr
== NULL
)
9566 /* We can't set abfd until now because the section may be empty or
9567 not present, in which case section->asection will be NULL. */
9568 abfd
= get_section_bfd_owner (section
);
9570 if (dwarf2_read_debug
)
9572 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9573 get_section_name (section
),
9574 get_section_file_name (section
));
9577 create_dwo_cu_data
.dwo_file
= dwo_file
;
9580 end_ptr
= info_ptr
+ section
->size
;
9581 while (info_ptr
< end_ptr
)
9583 struct dwarf2_per_cu_data per_cu
;
9585 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9586 sizeof (create_dwo_cu_data
.dwo_unit
));
9587 memset (&per_cu
, 0, sizeof (per_cu
));
9588 per_cu
.objfile
= objfile
;
9589 per_cu
.is_debug_types
= 0;
9590 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9591 per_cu
.section
= section
;
9593 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9594 create_dwo_cu_reader
,
9595 &create_dwo_cu_data
);
9597 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9599 /* If we've already found one, complain. We only support one
9600 because having more than one requires hacking the dwo_name of
9601 each to match, which is highly unlikely to happen. */
9602 if (dwo_unit
!= NULL
)
9604 complaint (&symfile_complaints
,
9605 _("Multiple CUs in DWO file %s [in module %s]"),
9606 dwo_file
->dwo_name
, objfile_name (objfile
));
9610 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9611 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9614 info_ptr
+= per_cu
.length
;
9620 /* DWP file .debug_{cu,tu}_index section format:
9621 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9625 Both index sections have the same format, and serve to map a 64-bit
9626 signature to a set of section numbers. Each section begins with a header,
9627 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9628 indexes, and a pool of 32-bit section numbers. The index sections will be
9629 aligned at 8-byte boundaries in the file.
9631 The index section header consists of:
9633 V, 32 bit version number
9635 N, 32 bit number of compilation units or type units in the index
9636 M, 32 bit number of slots in the hash table
9638 Numbers are recorded using the byte order of the application binary.
9640 The hash table begins at offset 16 in the section, and consists of an array
9641 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9642 order of the application binary). Unused slots in the hash table are 0.
9643 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9645 The parallel table begins immediately after the hash table
9646 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9647 array of 32-bit indexes (using the byte order of the application binary),
9648 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9649 table contains a 32-bit index into the pool of section numbers. For unused
9650 hash table slots, the corresponding entry in the parallel table will be 0.
9652 The pool of section numbers begins immediately following the hash table
9653 (at offset 16 + 12 * M from the beginning of the section). The pool of
9654 section numbers consists of an array of 32-bit words (using the byte order
9655 of the application binary). Each item in the array is indexed starting
9656 from 0. The hash table entry provides the index of the first section
9657 number in the set. Additional section numbers in the set follow, and the
9658 set is terminated by a 0 entry (section number 0 is not used in ELF).
9660 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9661 section must be the first entry in the set, and the .debug_abbrev.dwo must
9662 be the second entry. Other members of the set may follow in any order.
9668 DWP Version 2 combines all the .debug_info, etc. sections into one,
9669 and the entries in the index tables are now offsets into these sections.
9670 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9673 Index Section Contents:
9675 Hash Table of Signatures dwp_hash_table.hash_table
9676 Parallel Table of Indices dwp_hash_table.unit_table
9677 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9678 Table of Section Sizes dwp_hash_table.v2.sizes
9680 The index section header consists of:
9682 V, 32 bit version number
9683 L, 32 bit number of columns in the table of section offsets
9684 N, 32 bit number of compilation units or type units in the index
9685 M, 32 bit number of slots in the hash table
9687 Numbers are recorded using the byte order of the application binary.
9689 The hash table has the same format as version 1.
9690 The parallel table of indices has the same format as version 1,
9691 except that the entries are origin-1 indices into the table of sections
9692 offsets and the table of section sizes.
9694 The table of offsets begins immediately following the parallel table
9695 (at offset 16 + 12 * M from the beginning of the section). The table is
9696 a two-dimensional array of 32-bit words (using the byte order of the
9697 application binary), with L columns and N+1 rows, in row-major order.
9698 Each row in the array is indexed starting from 0. The first row provides
9699 a key to the remaining rows: each column in this row provides an identifier
9700 for a debug section, and the offsets in the same column of subsequent rows
9701 refer to that section. The section identifiers are:
9703 DW_SECT_INFO 1 .debug_info.dwo
9704 DW_SECT_TYPES 2 .debug_types.dwo
9705 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9706 DW_SECT_LINE 4 .debug_line.dwo
9707 DW_SECT_LOC 5 .debug_loc.dwo
9708 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9709 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9710 DW_SECT_MACRO 8 .debug_macro.dwo
9712 The offsets provided by the CU and TU index sections are the base offsets
9713 for the contributions made by each CU or TU to the corresponding section
9714 in the package file. Each CU and TU header contains an abbrev_offset
9715 field, used to find the abbreviations table for that CU or TU within the
9716 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9717 be interpreted as relative to the base offset given in the index section.
9718 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9719 should be interpreted as relative to the base offset for .debug_line.dwo,
9720 and offsets into other debug sections obtained from DWARF attributes should
9721 also be interpreted as relative to the corresponding base offset.
9723 The table of sizes begins immediately following the table of offsets.
9724 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9725 with L columns and N rows, in row-major order. Each row in the array is
9726 indexed starting from 1 (row 0 is shared by the two tables).
9730 Hash table lookup is handled the same in version 1 and 2:
9732 We assume that N and M will not exceed 2^32 - 1.
9733 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9735 Given a 64-bit compilation unit signature or a type signature S, an entry
9736 in the hash table is located as follows:
9738 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9739 the low-order k bits all set to 1.
9741 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9743 3) If the hash table entry at index H matches the signature, use that
9744 entry. If the hash table entry at index H is unused (all zeroes),
9745 terminate the search: the signature is not present in the table.
9747 4) Let H = (H + H') modulo M. Repeat at Step 3.
9749 Because M > N and H' and M are relatively prime, the search is guaranteed
9750 to stop at an unused slot or find the match. */
9752 /* Create a hash table to map DWO IDs to their CU/TU entry in
9753 .debug_{info,types}.dwo in DWP_FILE.
9754 Returns NULL if there isn't one.
9755 Note: This function processes DWP files only, not DWO files. */
9757 static struct dwp_hash_table
*
9758 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9760 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9761 bfd
*dbfd
= dwp_file
->dbfd
;
9762 const gdb_byte
*index_ptr
, *index_end
;
9763 struct dwarf2_section_info
*index
;
9764 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9765 struct dwp_hash_table
*htab
;
9768 index
= &dwp_file
->sections
.tu_index
;
9770 index
= &dwp_file
->sections
.cu_index
;
9772 if (dwarf2_section_empty_p (index
))
9774 dwarf2_read_section (objfile
, index
);
9776 index_ptr
= index
->buffer
;
9777 index_end
= index_ptr
+ index
->size
;
9779 version
= read_4_bytes (dbfd
, index_ptr
);
9782 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9786 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9788 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9791 if (version
!= 1 && version
!= 2)
9793 error (_("Dwarf Error: unsupported DWP file version (%s)"
9795 pulongest (version
), dwp_file
->name
);
9797 if (nr_slots
!= (nr_slots
& -nr_slots
))
9799 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9800 " is not power of 2 [in module %s]"),
9801 pulongest (nr_slots
), dwp_file
->name
);
9804 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9805 htab
->version
= version
;
9806 htab
->nr_columns
= nr_columns
;
9807 htab
->nr_units
= nr_units
;
9808 htab
->nr_slots
= nr_slots
;
9809 htab
->hash_table
= index_ptr
;
9810 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9812 /* Exit early if the table is empty. */
9813 if (nr_slots
== 0 || nr_units
== 0
9814 || (version
== 2 && nr_columns
== 0))
9816 /* All must be zero. */
9817 if (nr_slots
!= 0 || nr_units
!= 0
9818 || (version
== 2 && nr_columns
!= 0))
9820 complaint (&symfile_complaints
,
9821 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9822 " all zero [in modules %s]"),
9830 htab
->section_pool
.v1
.indices
=
9831 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9832 /* It's harder to decide whether the section is too small in v1.
9833 V1 is deprecated anyway so we punt. */
9837 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9838 int *ids
= htab
->section_pool
.v2
.section_ids
;
9839 /* Reverse map for error checking. */
9840 int ids_seen
[DW_SECT_MAX
+ 1];
9845 error (_("Dwarf Error: bad DWP hash table, too few columns"
9846 " in section table [in module %s]"),
9849 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9851 error (_("Dwarf Error: bad DWP hash table, too many columns"
9852 " in section table [in module %s]"),
9855 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9856 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9857 for (i
= 0; i
< nr_columns
; ++i
)
9859 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9861 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9863 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9864 " in section table [in module %s]"),
9865 id
, dwp_file
->name
);
9867 if (ids_seen
[id
] != -1)
9869 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9870 " id %d in section table [in module %s]"),
9871 id
, dwp_file
->name
);
9876 /* Must have exactly one info or types section. */
9877 if (((ids_seen
[DW_SECT_INFO
] != -1)
9878 + (ids_seen
[DW_SECT_TYPES
] != -1))
9881 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9882 " DWO info/types section [in module %s]"),
9885 /* Must have an abbrev section. */
9886 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9888 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9889 " section [in module %s]"),
9892 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9893 htab
->section_pool
.v2
.sizes
=
9894 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9895 * nr_units
* nr_columns
);
9896 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9897 * nr_units
* nr_columns
))
9900 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9909 /* Update SECTIONS with the data from SECTP.
9911 This function is like the other "locate" section routines that are
9912 passed to bfd_map_over_sections, but in this context the sections to
9913 read comes from the DWP V1 hash table, not the full ELF section table.
9915 The result is non-zero for success, or zero if an error was found. */
9918 locate_v1_virtual_dwo_sections (asection
*sectp
,
9919 struct virtual_v1_dwo_sections
*sections
)
9921 const struct dwop_section_names
*names
= &dwop_section_names
;
9923 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9925 /* There can be only one. */
9926 if (sections
->abbrev
.s
.asection
!= NULL
)
9928 sections
->abbrev
.s
.asection
= sectp
;
9929 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9931 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9932 || section_is_p (sectp
->name
, &names
->types_dwo
))
9934 /* There can be only one. */
9935 if (sections
->info_or_types
.s
.asection
!= NULL
)
9937 sections
->info_or_types
.s
.asection
= sectp
;
9938 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9940 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9942 /* There can be only one. */
9943 if (sections
->line
.s
.asection
!= NULL
)
9945 sections
->line
.s
.asection
= sectp
;
9946 sections
->line
.size
= bfd_get_section_size (sectp
);
9948 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9950 /* There can be only one. */
9951 if (sections
->loc
.s
.asection
!= NULL
)
9953 sections
->loc
.s
.asection
= sectp
;
9954 sections
->loc
.size
= bfd_get_section_size (sectp
);
9956 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9958 /* There can be only one. */
9959 if (sections
->macinfo
.s
.asection
!= NULL
)
9961 sections
->macinfo
.s
.asection
= sectp
;
9962 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9964 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9966 /* There can be only one. */
9967 if (sections
->macro
.s
.asection
!= NULL
)
9969 sections
->macro
.s
.asection
= sectp
;
9970 sections
->macro
.size
= bfd_get_section_size (sectp
);
9972 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9974 /* There can be only one. */
9975 if (sections
->str_offsets
.s
.asection
!= NULL
)
9977 sections
->str_offsets
.s
.asection
= sectp
;
9978 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
9982 /* No other kind of section is valid. */
9989 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
9990 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
9991 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
9992 This is for DWP version 1 files. */
9994 static struct dwo_unit
*
9995 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
9996 uint32_t unit_index
,
9997 const char *comp_dir
,
9998 ULONGEST signature
, int is_debug_types
)
10000 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10001 const struct dwp_hash_table
*dwp_htab
=
10002 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10003 bfd
*dbfd
= dwp_file
->dbfd
;
10004 const char *kind
= is_debug_types
? "TU" : "CU";
10005 struct dwo_file
*dwo_file
;
10006 struct dwo_unit
*dwo_unit
;
10007 struct virtual_v1_dwo_sections sections
;
10008 void **dwo_file_slot
;
10009 char *virtual_dwo_name
;
10010 struct dwarf2_section_info
*cutu
;
10011 struct cleanup
*cleanups
;
10014 gdb_assert (dwp_file
->version
== 1);
10016 if (dwarf2_read_debug
)
10018 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10020 pulongest (unit_index
), hex_string (signature
),
10024 /* Fetch the sections of this DWO unit.
10025 Put a limit on the number of sections we look for so that bad data
10026 doesn't cause us to loop forever. */
10028 #define MAX_NR_V1_DWO_SECTIONS \
10029 (1 /* .debug_info or .debug_types */ \
10030 + 1 /* .debug_abbrev */ \
10031 + 1 /* .debug_line */ \
10032 + 1 /* .debug_loc */ \
10033 + 1 /* .debug_str_offsets */ \
10034 + 1 /* .debug_macro or .debug_macinfo */ \
10035 + 1 /* trailing zero */)
10037 memset (§ions
, 0, sizeof (sections
));
10038 cleanups
= make_cleanup (null_cleanup
, 0);
10040 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10043 uint32_t section_nr
=
10044 read_4_bytes (dbfd
,
10045 dwp_htab
->section_pool
.v1
.indices
10046 + (unit_index
+ i
) * sizeof (uint32_t));
10048 if (section_nr
== 0)
10050 if (section_nr
>= dwp_file
->num_sections
)
10052 error (_("Dwarf Error: bad DWP hash table, section number too large"
10053 " [in module %s]"),
10057 sectp
= dwp_file
->elf_sections
[section_nr
];
10058 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10060 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10061 " [in module %s]"),
10067 || dwarf2_section_empty_p (§ions
.info_or_types
)
10068 || dwarf2_section_empty_p (§ions
.abbrev
))
10070 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10071 " [in module %s]"),
10074 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10076 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10077 " [in module %s]"),
10081 /* It's easier for the rest of the code if we fake a struct dwo_file and
10082 have dwo_unit "live" in that. At least for now.
10084 The DWP file can be made up of a random collection of CUs and TUs.
10085 However, for each CU + set of TUs that came from the same original DWO
10086 file, we can combine them back into a virtual DWO file to save space
10087 (fewer struct dwo_file objects to allocate). Remember that for really
10088 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10091 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10092 get_section_id (§ions
.abbrev
),
10093 get_section_id (§ions
.line
),
10094 get_section_id (§ions
.loc
),
10095 get_section_id (§ions
.str_offsets
));
10096 make_cleanup (xfree
, virtual_dwo_name
);
10097 /* Can we use an existing virtual DWO file? */
10098 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10099 /* Create one if necessary. */
10100 if (*dwo_file_slot
== NULL
)
10102 if (dwarf2_read_debug
)
10104 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10107 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10108 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
10110 strlen (virtual_dwo_name
));
10111 dwo_file
->comp_dir
= comp_dir
;
10112 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10113 dwo_file
->sections
.line
= sections
.line
;
10114 dwo_file
->sections
.loc
= sections
.loc
;
10115 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10116 dwo_file
->sections
.macro
= sections
.macro
;
10117 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10118 /* The "str" section is global to the entire DWP file. */
10119 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10120 /* The info or types section is assigned below to dwo_unit,
10121 there's no need to record it in dwo_file.
10122 Also, we can't simply record type sections in dwo_file because
10123 we record a pointer into the vector in dwo_unit. As we collect more
10124 types we'll grow the vector and eventually have to reallocate space
10125 for it, invalidating all copies of pointers into the previous
10127 *dwo_file_slot
= dwo_file
;
10131 if (dwarf2_read_debug
)
10133 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10136 dwo_file
= *dwo_file_slot
;
10138 do_cleanups (cleanups
);
10140 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10141 dwo_unit
->dwo_file
= dwo_file
;
10142 dwo_unit
->signature
= signature
;
10143 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
10144 sizeof (struct dwarf2_section_info
));
10145 *dwo_unit
->section
= sections
.info_or_types
;
10146 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10151 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10152 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10153 piece within that section used by a TU/CU, return a virtual section
10154 of just that piece. */
10156 static struct dwarf2_section_info
10157 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10158 bfd_size_type offset
, bfd_size_type size
)
10160 struct dwarf2_section_info result
;
10163 gdb_assert (section
!= NULL
);
10164 gdb_assert (!section
->is_virtual
);
10166 memset (&result
, 0, sizeof (result
));
10167 result
.s
.containing_section
= section
;
10168 result
.is_virtual
= 1;
10173 sectp
= get_section_bfd_section (section
);
10175 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10176 bounds of the real section. This is a pretty-rare event, so just
10177 flag an error (easier) instead of a warning and trying to cope. */
10179 || offset
+ size
> bfd_get_section_size (sectp
))
10181 bfd
*abfd
= sectp
->owner
;
10183 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10184 " in section %s [in module %s]"),
10185 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10186 objfile_name (dwarf2_per_objfile
->objfile
));
10189 result
.virtual_offset
= offset
;
10190 result
.size
= size
;
10194 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10195 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10196 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10197 This is for DWP version 2 files. */
10199 static struct dwo_unit
*
10200 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10201 uint32_t unit_index
,
10202 const char *comp_dir
,
10203 ULONGEST signature
, int is_debug_types
)
10205 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10206 const struct dwp_hash_table
*dwp_htab
=
10207 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10208 bfd
*dbfd
= dwp_file
->dbfd
;
10209 const char *kind
= is_debug_types
? "TU" : "CU";
10210 struct dwo_file
*dwo_file
;
10211 struct dwo_unit
*dwo_unit
;
10212 struct virtual_v2_dwo_sections sections
;
10213 void **dwo_file_slot
;
10214 char *virtual_dwo_name
;
10215 struct dwarf2_section_info
*cutu
;
10216 struct cleanup
*cleanups
;
10219 gdb_assert (dwp_file
->version
== 2);
10221 if (dwarf2_read_debug
)
10223 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10225 pulongest (unit_index
), hex_string (signature
),
10229 /* Fetch the section offsets of this DWO unit. */
10231 memset (§ions
, 0, sizeof (sections
));
10232 cleanups
= make_cleanup (null_cleanup
, 0);
10234 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10236 uint32_t offset
= read_4_bytes (dbfd
,
10237 dwp_htab
->section_pool
.v2
.offsets
10238 + (((unit_index
- 1) * dwp_htab
->nr_columns
10240 * sizeof (uint32_t)));
10241 uint32_t size
= read_4_bytes (dbfd
,
10242 dwp_htab
->section_pool
.v2
.sizes
10243 + (((unit_index
- 1) * dwp_htab
->nr_columns
10245 * sizeof (uint32_t)));
10247 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10250 case DW_SECT_TYPES
:
10251 sections
.info_or_types_offset
= offset
;
10252 sections
.info_or_types_size
= size
;
10254 case DW_SECT_ABBREV
:
10255 sections
.abbrev_offset
= offset
;
10256 sections
.abbrev_size
= size
;
10259 sections
.line_offset
= offset
;
10260 sections
.line_size
= size
;
10263 sections
.loc_offset
= offset
;
10264 sections
.loc_size
= size
;
10266 case DW_SECT_STR_OFFSETS
:
10267 sections
.str_offsets_offset
= offset
;
10268 sections
.str_offsets_size
= size
;
10270 case DW_SECT_MACINFO
:
10271 sections
.macinfo_offset
= offset
;
10272 sections
.macinfo_size
= size
;
10274 case DW_SECT_MACRO
:
10275 sections
.macro_offset
= offset
;
10276 sections
.macro_size
= size
;
10281 /* It's easier for the rest of the code if we fake a struct dwo_file and
10282 have dwo_unit "live" in that. At least for now.
10284 The DWP file can be made up of a random collection of CUs and TUs.
10285 However, for each CU + set of TUs that came from the same original DWO
10286 file, we can combine them back into a virtual DWO file to save space
10287 (fewer struct dwo_file objects to allocate). Remember that for really
10288 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10291 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10292 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10293 (long) (sections
.line_size
? sections
.line_offset
: 0),
10294 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10295 (long) (sections
.str_offsets_size
10296 ? sections
.str_offsets_offset
: 0));
10297 make_cleanup (xfree
, virtual_dwo_name
);
10298 /* Can we use an existing virtual DWO file? */
10299 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10300 /* Create one if necessary. */
10301 if (*dwo_file_slot
== NULL
)
10303 if (dwarf2_read_debug
)
10305 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10308 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10309 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
10311 strlen (virtual_dwo_name
));
10312 dwo_file
->comp_dir
= comp_dir
;
10313 dwo_file
->sections
.abbrev
=
10314 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10315 sections
.abbrev_offset
, sections
.abbrev_size
);
10316 dwo_file
->sections
.line
=
10317 create_dwp_v2_section (&dwp_file
->sections
.line
,
10318 sections
.line_offset
, sections
.line_size
);
10319 dwo_file
->sections
.loc
=
10320 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10321 sections
.loc_offset
, sections
.loc_size
);
10322 dwo_file
->sections
.macinfo
=
10323 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10324 sections
.macinfo_offset
, sections
.macinfo_size
);
10325 dwo_file
->sections
.macro
=
10326 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10327 sections
.macro_offset
, sections
.macro_size
);
10328 dwo_file
->sections
.str_offsets
=
10329 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10330 sections
.str_offsets_offset
,
10331 sections
.str_offsets_size
);
10332 /* The "str" section is global to the entire DWP file. */
10333 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10334 /* The info or types section is assigned below to dwo_unit,
10335 there's no need to record it in dwo_file.
10336 Also, we can't simply record type sections in dwo_file because
10337 we record a pointer into the vector in dwo_unit. As we collect more
10338 types we'll grow the vector and eventually have to reallocate space
10339 for it, invalidating all copies of pointers into the previous
10341 *dwo_file_slot
= dwo_file
;
10345 if (dwarf2_read_debug
)
10347 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10350 dwo_file
= *dwo_file_slot
;
10352 do_cleanups (cleanups
);
10354 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10355 dwo_unit
->dwo_file
= dwo_file
;
10356 dwo_unit
->signature
= signature
;
10357 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
10358 sizeof (struct dwarf2_section_info
));
10359 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10360 ? &dwp_file
->sections
.types
10361 : &dwp_file
->sections
.info
,
10362 sections
.info_or_types_offset
,
10363 sections
.info_or_types_size
);
10364 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10369 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10370 Returns NULL if the signature isn't found. */
10372 static struct dwo_unit
*
10373 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10374 ULONGEST signature
, int is_debug_types
)
10376 const struct dwp_hash_table
*dwp_htab
=
10377 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10378 bfd
*dbfd
= dwp_file
->dbfd
;
10379 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10380 uint32_t hash
= signature
& mask
;
10381 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10384 struct dwo_unit find_dwo_cu
, *dwo_cu
;
10386 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10387 find_dwo_cu
.signature
= signature
;
10388 slot
= htab_find_slot (is_debug_types
10389 ? dwp_file
->loaded_tus
10390 : dwp_file
->loaded_cus
,
10391 &find_dwo_cu
, INSERT
);
10396 /* Use a for loop so that we don't loop forever on bad debug info. */
10397 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10399 ULONGEST signature_in_table
;
10401 signature_in_table
=
10402 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10403 if (signature_in_table
== signature
)
10405 uint32_t unit_index
=
10406 read_4_bytes (dbfd
,
10407 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10409 if (dwp_file
->version
== 1)
10411 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10412 comp_dir
, signature
,
10417 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10418 comp_dir
, signature
,
10423 if (signature_in_table
== 0)
10425 hash
= (hash
+ hash2
) & mask
;
10428 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10429 " [in module %s]"),
10433 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10434 Open the file specified by FILE_NAME and hand it off to BFD for
10435 preliminary analysis. Return a newly initialized bfd *, which
10436 includes a canonicalized copy of FILE_NAME.
10437 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10438 SEARCH_CWD is true if the current directory is to be searched.
10439 It will be searched before debug-file-directory.
10440 If successful, the file is added to the bfd include table of the
10441 objfile's bfd (see gdb_bfd_record_inclusion).
10442 If unable to find/open the file, return NULL.
10443 NOTE: This function is derived from symfile_bfd_open. */
10446 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10450 char *absolute_name
;
10451 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10452 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10453 to debug_file_directory. */
10455 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10459 if (*debug_file_directory
!= '\0')
10460 search_path
= concat (".", dirname_separator_string
,
10461 debug_file_directory
, NULL
);
10463 search_path
= xstrdup (".");
10466 search_path
= xstrdup (debug_file_directory
);
10468 flags
= OPF_RETURN_REALPATH
;
10470 flags
|= OPF_SEARCH_IN_PATH
;
10471 desc
= openp (search_path
, flags
, file_name
,
10472 O_RDONLY
| O_BINARY
, &absolute_name
);
10473 xfree (search_path
);
10477 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
10478 xfree (absolute_name
);
10479 if (sym_bfd
== NULL
)
10481 bfd_set_cacheable (sym_bfd
, 1);
10483 if (!bfd_check_format (sym_bfd
, bfd_object
))
10485 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
10489 /* Success. Record the bfd as having been included by the objfile's bfd.
10490 This is important because things like demangled_names_hash lives in the
10491 objfile's per_bfd space and may have references to things like symbol
10492 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10493 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
);
10498 /* Try to open DWO file FILE_NAME.
10499 COMP_DIR is the DW_AT_comp_dir attribute.
10500 The result is the bfd handle of the file.
10501 If there is a problem finding or opening the file, return NULL.
10502 Upon success, the canonicalized path of the file is stored in the bfd,
10503 same as symfile_bfd_open. */
10506 open_dwo_file (const char *file_name
, const char *comp_dir
)
10510 if (IS_ABSOLUTE_PATH (file_name
))
10511 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10513 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10515 if (comp_dir
!= NULL
)
10517 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
10519 /* NOTE: If comp_dir is a relative path, this will also try the
10520 search path, which seems useful. */
10521 abfd
= try_open_dwop_file (path_to_try
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10522 xfree (path_to_try
);
10527 /* That didn't work, try debug-file-directory, which, despite its name,
10528 is a list of paths. */
10530 if (*debug_file_directory
== '\0')
10533 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10536 /* This function is mapped across the sections and remembers the offset and
10537 size of each of the DWO debugging sections we are interested in. */
10540 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10542 struct dwo_sections
*dwo_sections
= dwo_sections_ptr
;
10543 const struct dwop_section_names
*names
= &dwop_section_names
;
10545 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10547 dwo_sections
->abbrev
.s
.asection
= sectp
;
10548 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10550 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10552 dwo_sections
->info
.s
.asection
= sectp
;
10553 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10555 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10557 dwo_sections
->line
.s
.asection
= sectp
;
10558 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10560 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10562 dwo_sections
->loc
.s
.asection
= sectp
;
10563 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10565 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10567 dwo_sections
->macinfo
.s
.asection
= sectp
;
10568 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10570 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10572 dwo_sections
->macro
.s
.asection
= sectp
;
10573 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10575 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10577 dwo_sections
->str
.s
.asection
= sectp
;
10578 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10580 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10582 dwo_sections
->str_offsets
.s
.asection
= sectp
;
10583 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10585 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10587 struct dwarf2_section_info type_section
;
10589 memset (&type_section
, 0, sizeof (type_section
));
10590 type_section
.s
.asection
= sectp
;
10591 type_section
.size
= bfd_get_section_size (sectp
);
10592 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10597 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10598 by PER_CU. This is for the non-DWP case.
10599 The result is NULL if DWO_NAME can't be found. */
10601 static struct dwo_file
*
10602 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10603 const char *dwo_name
, const char *comp_dir
)
10605 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10606 struct dwo_file
*dwo_file
;
10608 struct cleanup
*cleanups
;
10610 dbfd
= open_dwo_file (dwo_name
, comp_dir
);
10613 if (dwarf2_read_debug
)
10614 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10617 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10618 dwo_file
->dwo_name
= dwo_name
;
10619 dwo_file
->comp_dir
= comp_dir
;
10620 dwo_file
->dbfd
= dbfd
;
10622 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10624 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
10626 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10628 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
10629 dwo_file
->sections
.types
);
10631 discard_cleanups (cleanups
);
10633 if (dwarf2_read_debug
)
10634 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10639 /* This function is mapped across the sections and remembers the offset and
10640 size of each of the DWP debugging sections common to version 1 and 2 that
10641 we are interested in. */
10644 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10645 void *dwp_file_ptr
)
10647 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10648 const struct dwop_section_names
*names
= &dwop_section_names
;
10649 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10651 /* Record the ELF section number for later lookup: this is what the
10652 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10653 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10654 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10656 /* Look for specific sections that we need. */
10657 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10659 dwp_file
->sections
.str
.s
.asection
= sectp
;
10660 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10662 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10664 dwp_file
->sections
.cu_index
.s
.asection
= sectp
;
10665 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10667 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10669 dwp_file
->sections
.tu_index
.s
.asection
= sectp
;
10670 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10674 /* This function is mapped across the sections and remembers the offset and
10675 size of each of the DWP version 2 debugging sections that we are interested
10676 in. This is split into a separate function because we don't know if we
10677 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10680 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10682 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10683 const struct dwop_section_names
*names
= &dwop_section_names
;
10684 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10686 /* Record the ELF section number for later lookup: this is what the
10687 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10688 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10689 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10691 /* Look for specific sections that we need. */
10692 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10694 dwp_file
->sections
.abbrev
.s
.asection
= sectp
;
10695 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10697 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10699 dwp_file
->sections
.info
.s
.asection
= sectp
;
10700 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10702 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10704 dwp_file
->sections
.line
.s
.asection
= sectp
;
10705 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10707 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10709 dwp_file
->sections
.loc
.s
.asection
= sectp
;
10710 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10712 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10714 dwp_file
->sections
.macinfo
.s
.asection
= sectp
;
10715 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10717 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10719 dwp_file
->sections
.macro
.s
.asection
= sectp
;
10720 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10722 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10724 dwp_file
->sections
.str_offsets
.s
.asection
= sectp
;
10725 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10727 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10729 dwp_file
->sections
.types
.s
.asection
= sectp
;
10730 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10734 /* Hash function for dwp_file loaded CUs/TUs. */
10737 hash_dwp_loaded_cutus (const void *item
)
10739 const struct dwo_unit
*dwo_unit
= item
;
10741 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10742 return dwo_unit
->signature
;
10745 /* Equality function for dwp_file loaded CUs/TUs. */
10748 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10750 const struct dwo_unit
*dua
= a
;
10751 const struct dwo_unit
*dub
= b
;
10753 return dua
->signature
== dub
->signature
;
10756 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10759 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10761 return htab_create_alloc_ex (3,
10762 hash_dwp_loaded_cutus
,
10763 eq_dwp_loaded_cutus
,
10765 &objfile
->objfile_obstack
,
10766 hashtab_obstack_allocate
,
10767 dummy_obstack_deallocate
);
10770 /* Try to open DWP file FILE_NAME.
10771 The result is the bfd handle of the file.
10772 If there is a problem finding or opening the file, return NULL.
10773 Upon success, the canonicalized path of the file is stored in the bfd,
10774 same as symfile_bfd_open. */
10777 open_dwp_file (const char *file_name
)
10781 abfd
= try_open_dwop_file (file_name
, 1 /*is_dwp*/, 1 /*search_cwd*/);
10785 /* Work around upstream bug 15652.
10786 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10787 [Whether that's a "bug" is debatable, but it is getting in our way.]
10788 We have no real idea where the dwp file is, because gdb's realpath-ing
10789 of the executable's path may have discarded the needed info.
10790 [IWBN if the dwp file name was recorded in the executable, akin to
10791 .gnu_debuglink, but that doesn't exist yet.]
10792 Strip the directory from FILE_NAME and search again. */
10793 if (*debug_file_directory
!= '\0')
10795 /* Don't implicitly search the current directory here.
10796 If the user wants to search "." to handle this case,
10797 it must be added to debug-file-directory. */
10798 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10805 /* Initialize the use of the DWP file for the current objfile.
10806 By convention the name of the DWP file is ${objfile}.dwp.
10807 The result is NULL if it can't be found. */
10809 static struct dwp_file
*
10810 open_and_init_dwp_file (void)
10812 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10813 struct dwp_file
*dwp_file
;
10816 struct cleanup
*cleanups
;
10818 /* Try to find first .dwp for the binary file before any symbolic links
10820 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10821 cleanups
= make_cleanup (xfree
, dwp_name
);
10823 dbfd
= open_dwp_file (dwp_name
);
10825 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10827 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10828 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10829 make_cleanup (xfree
, dwp_name
);
10830 dbfd
= open_dwp_file (dwp_name
);
10835 if (dwarf2_read_debug
)
10836 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10837 do_cleanups (cleanups
);
10840 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10841 dwp_file
->name
= bfd_get_filename (dbfd
);
10842 dwp_file
->dbfd
= dbfd
;
10843 do_cleanups (cleanups
);
10845 /* +1: section 0 is unused */
10846 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
10847 dwp_file
->elf_sections
=
10848 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10849 dwp_file
->num_sections
, asection
*);
10851 bfd_map_over_sections (dbfd
, dwarf2_locate_common_dwp_sections
, dwp_file
);
10853 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10855 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10857 /* The DWP file version is stored in the hash table. Oh well. */
10858 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10860 /* Technically speaking, we should try to limp along, but this is
10861 pretty bizarre. We use pulongest here because that's the established
10862 portability solution (e.g, we cannot use %u for uint32_t). */
10863 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10864 " TU version %s [in DWP file %s]"),
10865 pulongest (dwp_file
->cus
->version
),
10866 pulongest (dwp_file
->tus
->version
), dwp_name
);
10868 dwp_file
->version
= dwp_file
->cus
->version
;
10870 if (dwp_file
->version
== 2)
10871 bfd_map_over_sections (dbfd
, dwarf2_locate_v2_dwp_sections
, dwp_file
);
10873 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10874 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10876 if (dwarf2_read_debug
)
10878 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10879 fprintf_unfiltered (gdb_stdlog
,
10880 " %s CUs, %s TUs\n",
10881 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10882 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10888 /* Wrapper around open_and_init_dwp_file, only open it once. */
10890 static struct dwp_file
*
10891 get_dwp_file (void)
10893 if (! dwarf2_per_objfile
->dwp_checked
)
10895 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10896 dwarf2_per_objfile
->dwp_checked
= 1;
10898 return dwarf2_per_objfile
->dwp_file
;
10901 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10902 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10903 or in the DWP file for the objfile, referenced by THIS_UNIT.
10904 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10905 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10907 This is called, for example, when wanting to read a variable with a
10908 complex location. Therefore we don't want to do file i/o for every call.
10909 Therefore we don't want to look for a DWO file on every call.
10910 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10911 then we check if we've already seen DWO_NAME, and only THEN do we check
10914 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10915 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10917 static struct dwo_unit
*
10918 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
10919 const char *dwo_name
, const char *comp_dir
,
10920 ULONGEST signature
, int is_debug_types
)
10922 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10923 const char *kind
= is_debug_types
? "TU" : "CU";
10924 void **dwo_file_slot
;
10925 struct dwo_file
*dwo_file
;
10926 struct dwp_file
*dwp_file
;
10928 /* First see if there's a DWP file.
10929 If we have a DWP file but didn't find the DWO inside it, don't
10930 look for the original DWO file. It makes gdb behave differently
10931 depending on whether one is debugging in the build tree. */
10933 dwp_file
= get_dwp_file ();
10934 if (dwp_file
!= NULL
)
10936 const struct dwp_hash_table
*dwp_htab
=
10937 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10939 if (dwp_htab
!= NULL
)
10941 struct dwo_unit
*dwo_cutu
=
10942 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
10943 signature
, is_debug_types
);
10945 if (dwo_cutu
!= NULL
)
10947 if (dwarf2_read_debug
)
10949 fprintf_unfiltered (gdb_stdlog
,
10950 "Virtual DWO %s %s found: @%s\n",
10951 kind
, hex_string (signature
),
10952 host_address_to_string (dwo_cutu
));
10960 /* No DWP file, look for the DWO file. */
10962 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
10963 if (*dwo_file_slot
== NULL
)
10965 /* Read in the file and build a table of the CUs/TUs it contains. */
10966 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
10968 /* NOTE: This will be NULL if unable to open the file. */
10969 dwo_file
= *dwo_file_slot
;
10971 if (dwo_file
!= NULL
)
10973 struct dwo_unit
*dwo_cutu
= NULL
;
10975 if (is_debug_types
&& dwo_file
->tus
)
10977 struct dwo_unit find_dwo_cutu
;
10979 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
10980 find_dwo_cutu
.signature
= signature
;
10981 dwo_cutu
= htab_find (dwo_file
->tus
, &find_dwo_cutu
);
10983 else if (!is_debug_types
&& dwo_file
->cu
)
10985 if (signature
== dwo_file
->cu
->signature
)
10986 dwo_cutu
= dwo_file
->cu
;
10989 if (dwo_cutu
!= NULL
)
10991 if (dwarf2_read_debug
)
10993 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
10994 kind
, dwo_name
, hex_string (signature
),
10995 host_address_to_string (dwo_cutu
));
11002 /* We didn't find it. This could mean a dwo_id mismatch, or
11003 someone deleted the DWO/DWP file, or the search path isn't set up
11004 correctly to find the file. */
11006 if (dwarf2_read_debug
)
11008 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
11009 kind
, dwo_name
, hex_string (signature
));
11012 /* This is a warning and not a complaint because it can be caused by
11013 pilot error (e.g., user accidentally deleting the DWO). */
11015 /* Print the name of the DWP file if we looked there, helps the user
11016 better diagnose the problem. */
11017 char *dwp_text
= NULL
;
11018 struct cleanup
*cleanups
;
11020 if (dwp_file
!= NULL
)
11021 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
11022 cleanups
= make_cleanup (xfree
, dwp_text
);
11024 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11025 " [in module %s]"),
11026 kind
, dwo_name
, hex_string (signature
),
11027 dwp_text
!= NULL
? dwp_text
: "",
11028 this_unit
->is_debug_types
? "TU" : "CU",
11029 this_unit
->offset
.sect_off
, objfile_name (objfile
));
11031 do_cleanups (cleanups
);
11036 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11037 See lookup_dwo_cutu_unit for details. */
11039 static struct dwo_unit
*
11040 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11041 const char *dwo_name
, const char *comp_dir
,
11042 ULONGEST signature
)
11044 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11047 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11048 See lookup_dwo_cutu_unit for details. */
11050 static struct dwo_unit
*
11051 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11052 const char *dwo_name
, const char *comp_dir
)
11054 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11057 /* Traversal function for queue_and_load_all_dwo_tus. */
11060 queue_and_load_dwo_tu (void **slot
, void *info
)
11062 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11063 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11064 ULONGEST signature
= dwo_unit
->signature
;
11065 struct signatured_type
*sig_type
=
11066 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11068 if (sig_type
!= NULL
)
11070 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11072 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11073 a real dependency of PER_CU on SIG_TYPE. That is detected later
11074 while processing PER_CU. */
11075 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11076 load_full_type_unit (sig_cu
);
11077 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11083 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11084 The DWO may have the only definition of the type, though it may not be
11085 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11086 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11089 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11091 struct dwo_unit
*dwo_unit
;
11092 struct dwo_file
*dwo_file
;
11094 gdb_assert (!per_cu
->is_debug_types
);
11095 gdb_assert (get_dwp_file () == NULL
);
11096 gdb_assert (per_cu
->cu
!= NULL
);
11098 dwo_unit
= per_cu
->cu
->dwo_unit
;
11099 gdb_assert (dwo_unit
!= NULL
);
11101 dwo_file
= dwo_unit
->dwo_file
;
11102 if (dwo_file
->tus
!= NULL
)
11103 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11106 /* Free all resources associated with DWO_FILE.
11107 Close the DWO file and munmap the sections.
11108 All memory should be on the objfile obstack. */
11111 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11114 struct dwarf2_section_info
*section
;
11116 /* Note: dbfd is NULL for virtual DWO files. */
11117 gdb_bfd_unref (dwo_file
->dbfd
);
11119 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11122 /* Wrapper for free_dwo_file for use in cleanups. */
11125 free_dwo_file_cleanup (void *arg
)
11127 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11128 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11130 free_dwo_file (dwo_file
, objfile
);
11133 /* Traversal function for free_dwo_files. */
11136 free_dwo_file_from_slot (void **slot
, void *info
)
11138 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11139 struct objfile
*objfile
= (struct objfile
*) info
;
11141 free_dwo_file (dwo_file
, objfile
);
11146 /* Free all resources associated with DWO_FILES. */
11149 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11151 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11154 /* Read in various DIEs. */
11156 /* qsort helper for inherit_abstract_dies. */
11159 unsigned_int_compar (const void *ap
, const void *bp
)
11161 unsigned int a
= *(unsigned int *) ap
;
11162 unsigned int b
= *(unsigned int *) bp
;
11164 return (a
> b
) - (b
> a
);
11167 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11168 Inherit only the children of the DW_AT_abstract_origin DIE not being
11169 already referenced by DW_AT_abstract_origin from the children of the
11173 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11175 struct die_info
*child_die
;
11176 unsigned die_children_count
;
11177 /* CU offsets which were referenced by children of the current DIE. */
11178 sect_offset
*offsets
;
11179 sect_offset
*offsets_end
, *offsetp
;
11180 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11181 struct die_info
*origin_die
;
11182 /* Iterator of the ORIGIN_DIE children. */
11183 struct die_info
*origin_child_die
;
11184 struct cleanup
*cleanups
;
11185 struct attribute
*attr
;
11186 struct dwarf2_cu
*origin_cu
;
11187 struct pending
**origin_previous_list_in_scope
;
11189 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11193 /* Note that following die references may follow to a die in a
11197 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11199 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11201 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11202 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11204 if (die
->tag
!= origin_die
->tag
11205 && !(die
->tag
== DW_TAG_inlined_subroutine
11206 && origin_die
->tag
== DW_TAG_subprogram
))
11207 complaint (&symfile_complaints
,
11208 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11209 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
11211 child_die
= die
->child
;
11212 die_children_count
= 0;
11213 while (child_die
&& child_die
->tag
)
11215 child_die
= sibling_die (child_die
);
11216 die_children_count
++;
11218 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
11219 cleanups
= make_cleanup (xfree
, offsets
);
11221 offsets_end
= offsets
;
11222 for (child_die
= die
->child
;
11223 child_die
&& child_die
->tag
;
11224 child_die
= sibling_die (child_die
))
11226 struct die_info
*child_origin_die
;
11227 struct dwarf2_cu
*child_origin_cu
;
11229 /* We are trying to process concrete instance entries:
11230 DW_TAG_GNU_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
11231 it's not relevant to our analysis here. i.e. detecting DIEs that are
11232 present in the abstract instance but not referenced in the concrete
11234 if (child_die
->tag
== DW_TAG_GNU_call_site
)
11237 /* For each CHILD_DIE, find the corresponding child of
11238 ORIGIN_DIE. If there is more than one layer of
11239 DW_AT_abstract_origin, follow them all; there shouldn't be,
11240 but GCC versions at least through 4.4 generate this (GCC PR
11242 child_origin_die
= child_die
;
11243 child_origin_cu
= cu
;
11246 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11250 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11254 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11255 counterpart may exist. */
11256 if (child_origin_die
!= child_die
)
11258 if (child_die
->tag
!= child_origin_die
->tag
11259 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11260 && child_origin_die
->tag
== DW_TAG_subprogram
))
11261 complaint (&symfile_complaints
,
11262 _("Child DIE 0x%x and its abstract origin 0x%x have "
11263 "different tags"), child_die
->offset
.sect_off
,
11264 child_origin_die
->offset
.sect_off
);
11265 if (child_origin_die
->parent
!= origin_die
)
11266 complaint (&symfile_complaints
,
11267 _("Child DIE 0x%x and its abstract origin 0x%x have "
11268 "different parents"), child_die
->offset
.sect_off
,
11269 child_origin_die
->offset
.sect_off
);
11271 *offsets_end
++ = child_origin_die
->offset
;
11274 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11275 unsigned_int_compar
);
11276 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11277 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11278 complaint (&symfile_complaints
,
11279 _("Multiple children of DIE 0x%x refer "
11280 "to DIE 0x%x as their abstract origin"),
11281 die
->offset
.sect_off
, offsetp
->sect_off
);
11284 origin_child_die
= origin_die
->child
;
11285 while (origin_child_die
&& origin_child_die
->tag
)
11287 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11288 while (offsetp
< offsets_end
11289 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11291 if (offsetp
>= offsets_end
11292 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11294 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11295 Check whether we're already processing ORIGIN_CHILD_DIE.
11296 This can happen with mutually referenced abstract_origins.
11298 if (!origin_child_die
->in_process
)
11299 process_die (origin_child_die
, origin_cu
);
11301 origin_child_die
= sibling_die (origin_child_die
);
11303 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11305 do_cleanups (cleanups
);
11309 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11311 struct objfile
*objfile
= cu
->objfile
;
11312 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11313 struct context_stack
*newobj
;
11316 struct die_info
*child_die
;
11317 struct attribute
*attr
, *call_line
, *call_file
;
11319 CORE_ADDR baseaddr
;
11320 struct block
*block
;
11321 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11322 VEC (symbolp
) *template_args
= NULL
;
11323 struct template_symbol
*templ_func
= NULL
;
11327 /* If we do not have call site information, we can't show the
11328 caller of this inlined function. That's too confusing, so
11329 only use the scope for local variables. */
11330 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11331 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11332 if (call_line
== NULL
|| call_file
== NULL
)
11334 read_lexical_block_scope (die
, cu
);
11339 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11341 name
= dwarf2_name (die
, cu
);
11343 /* Ignore functions with missing or empty names. These are actually
11344 illegal according to the DWARF standard. */
11347 complaint (&symfile_complaints
,
11348 _("missing name for subprogram DIE at %d"),
11349 die
->offset
.sect_off
);
11353 /* Ignore functions with missing or invalid low and high pc attributes. */
11354 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11356 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11357 if (!attr
|| !DW_UNSND (attr
))
11358 complaint (&symfile_complaints
,
11359 _("cannot get low and high bounds "
11360 "for subprogram DIE at %d"),
11361 die
->offset
.sect_off
);
11365 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11366 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11368 /* If we have any template arguments, then we must allocate a
11369 different sort of symbol. */
11370 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11372 if (child_die
->tag
== DW_TAG_template_type_param
11373 || child_die
->tag
== DW_TAG_template_value_param
)
11375 templ_func
= allocate_template_symbol (objfile
);
11376 templ_func
->base
.is_cplus_template_function
= 1;
11381 newobj
= push_context (0, lowpc
);
11382 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11383 (struct symbol
*) templ_func
);
11385 /* If there is a location expression for DW_AT_frame_base, record
11387 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11389 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
11391 cu
->list_in_scope
= &local_symbols
;
11393 if (die
->child
!= NULL
)
11395 child_die
= die
->child
;
11396 while (child_die
&& child_die
->tag
)
11398 if (child_die
->tag
== DW_TAG_template_type_param
11399 || child_die
->tag
== DW_TAG_template_value_param
)
11401 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11404 VEC_safe_push (symbolp
, template_args
, arg
);
11407 process_die (child_die
, cu
);
11408 child_die
= sibling_die (child_die
);
11412 inherit_abstract_dies (die
, cu
);
11414 /* If we have a DW_AT_specification, we might need to import using
11415 directives from the context of the specification DIE. See the
11416 comment in determine_prefix. */
11417 if (cu
->language
== language_cplus
11418 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11420 struct dwarf2_cu
*spec_cu
= cu
;
11421 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11425 child_die
= spec_die
->child
;
11426 while (child_die
&& child_die
->tag
)
11428 if (child_die
->tag
== DW_TAG_imported_module
)
11429 process_die (child_die
, spec_cu
);
11430 child_die
= sibling_die (child_die
);
11433 /* In some cases, GCC generates specification DIEs that
11434 themselves contain DW_AT_specification attributes. */
11435 spec_die
= die_specification (spec_die
, &spec_cu
);
11439 newobj
= pop_context ();
11440 /* Make a block for the local symbols within. */
11441 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
11444 /* For C++, set the block's scope. */
11445 if ((cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
11446 && cu
->processing_has_namespace_info
)
11447 block_set_scope (block
, determine_prefix (die
, cu
),
11448 &objfile
->objfile_obstack
);
11450 /* If we have address ranges, record them. */
11451 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11453 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
11455 /* Attach template arguments to function. */
11456 if (! VEC_empty (symbolp
, template_args
))
11458 gdb_assert (templ_func
!= NULL
);
11460 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11461 templ_func
->template_arguments
11462 = obstack_alloc (&objfile
->objfile_obstack
,
11463 (templ_func
->n_template_arguments
11464 * sizeof (struct symbol
*)));
11465 memcpy (templ_func
->template_arguments
,
11466 VEC_address (symbolp
, template_args
),
11467 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11468 VEC_free (symbolp
, template_args
);
11471 /* In C++, we can have functions nested inside functions (e.g., when
11472 a function declares a class that has methods). This means that
11473 when we finish processing a function scope, we may need to go
11474 back to building a containing block's symbol lists. */
11475 local_symbols
= newobj
->locals
;
11476 using_directives
= newobj
->using_directives
;
11478 /* If we've finished processing a top-level function, subsequent
11479 symbols go in the file symbol list. */
11480 if (outermost_context_p ())
11481 cu
->list_in_scope
= &file_symbols
;
11484 /* Process all the DIES contained within a lexical block scope. Start
11485 a new scope, process the dies, and then close the scope. */
11488 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11490 struct objfile
*objfile
= cu
->objfile
;
11491 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11492 struct context_stack
*newobj
;
11493 CORE_ADDR lowpc
, highpc
;
11494 struct die_info
*child_die
;
11495 CORE_ADDR baseaddr
;
11497 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11499 /* Ignore blocks with missing or invalid low and high pc attributes. */
11500 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11501 as multiple lexical blocks? Handling children in a sane way would
11502 be nasty. Might be easier to properly extend generic blocks to
11503 describe ranges. */
11504 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11506 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11507 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11509 push_context (0, lowpc
);
11510 if (die
->child
!= NULL
)
11512 child_die
= die
->child
;
11513 while (child_die
&& child_die
->tag
)
11515 process_die (child_die
, cu
);
11516 child_die
= sibling_die (child_die
);
11519 inherit_abstract_dies (die
, cu
);
11520 newobj
= pop_context ();
11522 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
11524 struct block
*block
11525 = finish_block (0, &local_symbols
, newobj
->old_blocks
,
11526 newobj
->start_addr
, highpc
);
11528 /* Note that recording ranges after traversing children, as we
11529 do here, means that recording a parent's ranges entails
11530 walking across all its children's ranges as they appear in
11531 the address map, which is quadratic behavior.
11533 It would be nicer to record the parent's ranges before
11534 traversing its children, simply overriding whatever you find
11535 there. But since we don't even decide whether to create a
11536 block until after we've traversed its children, that's hard
11538 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11540 local_symbols
= newobj
->locals
;
11541 using_directives
= newobj
->using_directives
;
11544 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11547 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11549 struct objfile
*objfile
= cu
->objfile
;
11550 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11551 CORE_ADDR pc
, baseaddr
;
11552 struct attribute
*attr
;
11553 struct call_site
*call_site
, call_site_local
;
11556 struct die_info
*child_die
;
11558 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11560 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11563 complaint (&symfile_complaints
,
11564 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11565 "DIE 0x%x [in module %s]"),
11566 die
->offset
.sect_off
, objfile_name (objfile
));
11569 pc
= attr_value_as_address (attr
) + baseaddr
;
11570 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11572 if (cu
->call_site_htab
== NULL
)
11573 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11574 NULL
, &objfile
->objfile_obstack
,
11575 hashtab_obstack_allocate
, NULL
);
11576 call_site_local
.pc
= pc
;
11577 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11580 complaint (&symfile_complaints
,
11581 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11582 "DIE 0x%x [in module %s]"),
11583 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11584 objfile_name (objfile
));
11588 /* Count parameters at the caller. */
11591 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11592 child_die
= sibling_die (child_die
))
11594 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11596 complaint (&symfile_complaints
,
11597 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11598 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11599 child_die
->tag
, child_die
->offset
.sect_off
,
11600 objfile_name (objfile
));
11607 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
11608 (sizeof (*call_site
)
11609 + (sizeof (*call_site
->parameter
)
11610 * (nparams
- 1))));
11612 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11613 call_site
->pc
= pc
;
11615 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11617 struct die_info
*func_die
;
11619 /* Skip also over DW_TAG_inlined_subroutine. */
11620 for (func_die
= die
->parent
;
11621 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11622 && func_die
->tag
!= DW_TAG_subroutine_type
;
11623 func_die
= func_die
->parent
);
11625 /* DW_AT_GNU_all_call_sites is a superset
11626 of DW_AT_GNU_all_tail_call_sites. */
11628 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11629 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11631 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11632 not complete. But keep CALL_SITE for look ups via call_site_htab,
11633 both the initial caller containing the real return address PC and
11634 the final callee containing the current PC of a chain of tail
11635 calls do not need to have the tail call list complete. But any
11636 function candidate for a virtual tail call frame searched via
11637 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11638 determined unambiguously. */
11642 struct type
*func_type
= NULL
;
11645 func_type
= get_die_type (func_die
, cu
);
11646 if (func_type
!= NULL
)
11648 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11650 /* Enlist this call site to the function. */
11651 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11652 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11655 complaint (&symfile_complaints
,
11656 _("Cannot find function owning DW_TAG_GNU_call_site "
11657 "DIE 0x%x [in module %s]"),
11658 die
->offset
.sect_off
, objfile_name (objfile
));
11662 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11664 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11665 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11666 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11667 /* Keep NULL DWARF_BLOCK. */;
11668 else if (attr_form_is_block (attr
))
11670 struct dwarf2_locexpr_baton
*dlbaton
;
11672 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
11673 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11674 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11675 dlbaton
->per_cu
= cu
->per_cu
;
11677 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11679 else if (attr_form_is_ref (attr
))
11681 struct dwarf2_cu
*target_cu
= cu
;
11682 struct die_info
*target_die
;
11684 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11685 gdb_assert (target_cu
->objfile
== objfile
);
11686 if (die_is_declaration (target_die
, target_cu
))
11688 const char *target_physname
= NULL
;
11689 struct attribute
*target_attr
;
11691 /* Prefer the mangled name; otherwise compute the demangled one. */
11692 target_attr
= dwarf2_attr (target_die
, DW_AT_linkage_name
, target_cu
);
11693 if (target_attr
== NULL
)
11694 target_attr
= dwarf2_attr (target_die
, DW_AT_MIPS_linkage_name
,
11696 if (target_attr
!= NULL
&& DW_STRING (target_attr
) != NULL
)
11697 target_physname
= DW_STRING (target_attr
);
11699 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11700 if (target_physname
== NULL
)
11701 complaint (&symfile_complaints
,
11702 _("DW_AT_GNU_call_site_target target DIE has invalid "
11703 "physname, for referencing DIE 0x%x [in module %s]"),
11704 die
->offset
.sect_off
, objfile_name (objfile
));
11706 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11712 /* DW_AT_entry_pc should be preferred. */
11713 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
11714 complaint (&symfile_complaints
,
11715 _("DW_AT_GNU_call_site_target target DIE has invalid "
11716 "low pc, for referencing DIE 0x%x [in module %s]"),
11717 die
->offset
.sect_off
, objfile_name (objfile
));
11720 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11721 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
11726 complaint (&symfile_complaints
,
11727 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11728 "block nor reference, for DIE 0x%x [in module %s]"),
11729 die
->offset
.sect_off
, objfile_name (objfile
));
11731 call_site
->per_cu
= cu
->per_cu
;
11733 for (child_die
= die
->child
;
11734 child_die
&& child_die
->tag
;
11735 child_die
= sibling_die (child_die
))
11737 struct call_site_parameter
*parameter
;
11738 struct attribute
*loc
, *origin
;
11740 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11742 /* Already printed the complaint above. */
11746 gdb_assert (call_site
->parameter_count
< nparams
);
11747 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11749 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11750 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11751 register is contained in DW_AT_GNU_call_site_value. */
11753 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11754 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11755 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11757 sect_offset offset
;
11759 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11760 offset
= dwarf2_get_ref_die_offset (origin
);
11761 if (!offset_in_cu_p (&cu
->header
, offset
))
11763 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11764 binding can be done only inside one CU. Such referenced DIE
11765 therefore cannot be even moved to DW_TAG_partial_unit. */
11766 complaint (&symfile_complaints
,
11767 _("DW_AT_abstract_origin offset is not in CU for "
11768 "DW_TAG_GNU_call_site child DIE 0x%x "
11770 child_die
->offset
.sect_off
, objfile_name (objfile
));
11773 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11774 - cu
->header
.offset
.sect_off
);
11776 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11778 complaint (&symfile_complaints
,
11779 _("No DW_FORM_block* DW_AT_location for "
11780 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11781 child_die
->offset
.sect_off
, objfile_name (objfile
));
11786 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11787 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11788 if (parameter
->u
.dwarf_reg
!= -1)
11789 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11790 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11791 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11792 ¶meter
->u
.fb_offset
))
11793 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11796 complaint (&symfile_complaints
,
11797 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11798 "for DW_FORM_block* DW_AT_location is supported for "
11799 "DW_TAG_GNU_call_site child DIE 0x%x "
11801 child_die
->offset
.sect_off
, objfile_name (objfile
));
11806 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11807 if (!attr_form_is_block (attr
))
11809 complaint (&symfile_complaints
,
11810 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11811 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11812 child_die
->offset
.sect_off
, objfile_name (objfile
));
11815 parameter
->value
= DW_BLOCK (attr
)->data
;
11816 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11818 /* Parameters are not pre-cleared by memset above. */
11819 parameter
->data_value
= NULL
;
11820 parameter
->data_value_size
= 0;
11821 call_site
->parameter_count
++;
11823 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11826 if (!attr_form_is_block (attr
))
11827 complaint (&symfile_complaints
,
11828 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11829 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11830 child_die
->offset
.sect_off
, objfile_name (objfile
));
11833 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11834 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11840 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11841 Return 1 if the attributes are present and valid, otherwise, return 0.
11842 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11845 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11846 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11847 struct partial_symtab
*ranges_pst
)
11849 struct objfile
*objfile
= cu
->objfile
;
11850 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11851 struct comp_unit_head
*cu_header
= &cu
->header
;
11852 bfd
*obfd
= objfile
->obfd
;
11853 unsigned int addr_size
= cu_header
->addr_size
;
11854 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11855 /* Base address selection entry. */
11858 unsigned int dummy
;
11859 const gdb_byte
*buffer
;
11863 CORE_ADDR high
= 0;
11864 CORE_ADDR baseaddr
;
11866 found_base
= cu
->base_known
;
11867 base
= cu
->base_address
;
11869 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11870 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11872 complaint (&symfile_complaints
,
11873 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11877 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11879 /* Read in the largest possible address. */
11880 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
11881 if ((marker
& mask
) == mask
)
11883 /* If we found the largest possible address, then
11884 read the base address. */
11885 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11886 buffer
+= 2 * addr_size
;
11887 offset
+= 2 * addr_size
;
11893 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11897 CORE_ADDR range_beginning
, range_end
;
11899 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11900 buffer
+= addr_size
;
11901 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11902 buffer
+= addr_size
;
11903 offset
+= 2 * addr_size
;
11905 /* An end of list marker is a pair of zero addresses. */
11906 if (range_beginning
== 0 && range_end
== 0)
11907 /* Found the end of list entry. */
11910 /* Each base address selection entry is a pair of 2 values.
11911 The first is the largest possible address, the second is
11912 the base address. Check for a base address here. */
11913 if ((range_beginning
& mask
) == mask
)
11915 /* If we found the largest possible address, then
11916 read the base address. */
11917 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11924 /* We have no valid base address for the ranges
11926 complaint (&symfile_complaints
,
11927 _("Invalid .debug_ranges data (no base address)"));
11931 if (range_beginning
> range_end
)
11933 /* Inverted range entries are invalid. */
11934 complaint (&symfile_complaints
,
11935 _("Invalid .debug_ranges data (inverted range)"));
11939 /* Empty range entries have no effect. */
11940 if (range_beginning
== range_end
)
11943 range_beginning
+= base
;
11946 /* A not-uncommon case of bad debug info.
11947 Don't pollute the addrmap with bad data. */
11948 if (range_beginning
+ baseaddr
== 0
11949 && !dwarf2_per_objfile
->has_section_at_zero
)
11951 complaint (&symfile_complaints
,
11952 _(".debug_ranges entry has start address of zero"
11953 " [in module %s]"), objfile_name (objfile
));
11957 if (ranges_pst
!= NULL
)
11962 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11963 range_beginning
+ baseaddr
);
11964 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11965 range_end
+ baseaddr
);
11966 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
11970 /* FIXME: This is recording everything as a low-high
11971 segment of consecutive addresses. We should have a
11972 data structure for discontiguous block ranges
11976 low
= range_beginning
;
11982 if (range_beginning
< low
)
11983 low
= range_beginning
;
11984 if (range_end
> high
)
11990 /* If the first entry is an end-of-list marker, the range
11991 describes an empty scope, i.e. no instructions. */
11997 *high_return
= high
;
12001 /* Get low and high pc attributes from a die. Return 1 if the attributes
12002 are present and valid, otherwise, return 0. Return -1 if the range is
12003 discontinuous, i.e. derived from DW_AT_ranges information. */
12006 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
12007 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
12008 struct partial_symtab
*pst
)
12010 struct attribute
*attr
;
12011 struct attribute
*attr_high
;
12013 CORE_ADDR high
= 0;
12016 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12019 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12022 low
= attr_value_as_address (attr
);
12023 high
= attr_value_as_address (attr_high
);
12024 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12028 /* Found high w/o low attribute. */
12031 /* Found consecutive range of addresses. */
12036 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12039 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12040 We take advantage of the fact that DW_AT_ranges does not appear
12041 in DW_TAG_compile_unit of DWO files. */
12042 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12043 unsigned int ranges_offset
= (DW_UNSND (attr
)
12044 + (need_ranges_base
12048 /* Value of the DW_AT_ranges attribute is the offset in the
12049 .debug_ranges section. */
12050 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12052 /* Found discontinuous range of addresses. */
12057 /* read_partial_die has also the strict LOW < HIGH requirement. */
12061 /* When using the GNU linker, .gnu.linkonce. sections are used to
12062 eliminate duplicate copies of functions and vtables and such.
12063 The linker will arbitrarily choose one and discard the others.
12064 The AT_*_pc values for such functions refer to local labels in
12065 these sections. If the section from that file was discarded, the
12066 labels are not in the output, so the relocs get a value of 0.
12067 If this is a discarded function, mark the pc bounds as invalid,
12068 so that GDB will ignore it. */
12069 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12078 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12079 its low and high PC addresses. Do nothing if these addresses could not
12080 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12081 and HIGHPC to the high address if greater than HIGHPC. */
12084 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12085 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12086 struct dwarf2_cu
*cu
)
12088 CORE_ADDR low
, high
;
12089 struct die_info
*child
= die
->child
;
12091 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
12093 *lowpc
= min (*lowpc
, low
);
12094 *highpc
= max (*highpc
, high
);
12097 /* If the language does not allow nested subprograms (either inside
12098 subprograms or lexical blocks), we're done. */
12099 if (cu
->language
!= language_ada
)
12102 /* Check all the children of the given DIE. If it contains nested
12103 subprograms, then check their pc bounds. Likewise, we need to
12104 check lexical blocks as well, as they may also contain subprogram
12106 while (child
&& child
->tag
)
12108 if (child
->tag
== DW_TAG_subprogram
12109 || child
->tag
== DW_TAG_lexical_block
)
12110 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12111 child
= sibling_die (child
);
12115 /* Get the low and high pc's represented by the scope DIE, and store
12116 them in *LOWPC and *HIGHPC. If the correct values can't be
12117 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12120 get_scope_pc_bounds (struct die_info
*die
,
12121 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12122 struct dwarf2_cu
*cu
)
12124 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12125 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12126 CORE_ADDR current_low
, current_high
;
12128 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
12130 best_low
= current_low
;
12131 best_high
= current_high
;
12135 struct die_info
*child
= die
->child
;
12137 while (child
&& child
->tag
)
12139 switch (child
->tag
) {
12140 case DW_TAG_subprogram
:
12141 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12143 case DW_TAG_namespace
:
12144 case DW_TAG_module
:
12145 /* FIXME: carlton/2004-01-16: Should we do this for
12146 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12147 that current GCC's always emit the DIEs corresponding
12148 to definitions of methods of classes as children of a
12149 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12150 the DIEs giving the declarations, which could be
12151 anywhere). But I don't see any reason why the
12152 standards says that they have to be there. */
12153 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12155 if (current_low
!= ((CORE_ADDR
) -1))
12157 best_low
= min (best_low
, current_low
);
12158 best_high
= max (best_high
, current_high
);
12166 child
= sibling_die (child
);
12171 *highpc
= best_high
;
12174 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12178 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12179 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12181 struct objfile
*objfile
= cu
->objfile
;
12182 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12183 struct attribute
*attr
;
12184 struct attribute
*attr_high
;
12186 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12189 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12192 CORE_ADDR low
= attr_value_as_address (attr
);
12193 CORE_ADDR high
= attr_value_as_address (attr_high
);
12195 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12198 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12199 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12200 record_block_range (block
, low
, high
- 1);
12204 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12207 bfd
*obfd
= objfile
->obfd
;
12208 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12209 We take advantage of the fact that DW_AT_ranges does not appear
12210 in DW_TAG_compile_unit of DWO files. */
12211 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12213 /* The value of the DW_AT_ranges attribute is the offset of the
12214 address range list in the .debug_ranges section. */
12215 unsigned long offset
= (DW_UNSND (attr
)
12216 + (need_ranges_base
? cu
->ranges_base
: 0));
12217 const gdb_byte
*buffer
;
12219 /* For some target architectures, but not others, the
12220 read_address function sign-extends the addresses it returns.
12221 To recognize base address selection entries, we need a
12223 unsigned int addr_size
= cu
->header
.addr_size
;
12224 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12226 /* The base address, to which the next pair is relative. Note
12227 that this 'base' is a DWARF concept: most entries in a range
12228 list are relative, to reduce the number of relocs against the
12229 debugging information. This is separate from this function's
12230 'baseaddr' argument, which GDB uses to relocate debugging
12231 information from a shared library based on the address at
12232 which the library was loaded. */
12233 CORE_ADDR base
= cu
->base_address
;
12234 int base_known
= cu
->base_known
;
12236 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12237 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12239 complaint (&symfile_complaints
,
12240 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
12244 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12248 unsigned int bytes_read
;
12249 CORE_ADDR start
, end
;
12251 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12252 buffer
+= bytes_read
;
12253 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12254 buffer
+= bytes_read
;
12256 /* Did we find the end of the range list? */
12257 if (start
== 0 && end
== 0)
12260 /* Did we find a base address selection entry? */
12261 else if ((start
& base_select_mask
) == base_select_mask
)
12267 /* We found an ordinary address range. */
12272 complaint (&symfile_complaints
,
12273 _("Invalid .debug_ranges data "
12274 "(no base address)"));
12280 /* Inverted range entries are invalid. */
12281 complaint (&symfile_complaints
,
12282 _("Invalid .debug_ranges data "
12283 "(inverted range)"));
12287 /* Empty range entries have no effect. */
12291 start
+= base
+ baseaddr
;
12292 end
+= base
+ baseaddr
;
12294 /* A not-uncommon case of bad debug info.
12295 Don't pollute the addrmap with bad data. */
12296 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12298 complaint (&symfile_complaints
,
12299 _(".debug_ranges entry has start address of zero"
12300 " [in module %s]"), objfile_name (objfile
));
12304 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12305 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12306 record_block_range (block
, start
, end
- 1);
12312 /* Check whether the producer field indicates either of GCC < 4.6, or the
12313 Intel C/C++ compiler, and cache the result in CU. */
12316 check_producer (struct dwarf2_cu
*cu
)
12321 if (cu
->producer
== NULL
)
12323 /* For unknown compilers expect their behavior is DWARF version
12326 GCC started to support .debug_types sections by -gdwarf-4 since
12327 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12328 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12329 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12330 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12332 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
12334 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12335 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12337 else if (startswith (cu
->producer
, "Intel(R) C"))
12338 cu
->producer_is_icc
= 1;
12341 /* For other non-GCC compilers, expect their behavior is DWARF version
12345 cu
->checked_producer
= 1;
12348 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12349 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12350 during 4.6.0 experimental. */
12353 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12355 if (!cu
->checked_producer
)
12356 check_producer (cu
);
12358 return cu
->producer_is_gxx_lt_4_6
;
12361 /* Return the default accessibility type if it is not overriden by
12362 DW_AT_accessibility. */
12364 static enum dwarf_access_attribute
12365 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12367 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12369 /* The default DWARF 2 accessibility for members is public, the default
12370 accessibility for inheritance is private. */
12372 if (die
->tag
!= DW_TAG_inheritance
)
12373 return DW_ACCESS_public
;
12375 return DW_ACCESS_private
;
12379 /* DWARF 3+ defines the default accessibility a different way. The same
12380 rules apply now for DW_TAG_inheritance as for the members and it only
12381 depends on the container kind. */
12383 if (die
->parent
->tag
== DW_TAG_class_type
)
12384 return DW_ACCESS_private
;
12386 return DW_ACCESS_public
;
12390 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12391 offset. If the attribute was not found return 0, otherwise return
12392 1. If it was found but could not properly be handled, set *OFFSET
12396 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12399 struct attribute
*attr
;
12401 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12406 /* Note that we do not check for a section offset first here.
12407 This is because DW_AT_data_member_location is new in DWARF 4,
12408 so if we see it, we can assume that a constant form is really
12409 a constant and not a section offset. */
12410 if (attr_form_is_constant (attr
))
12411 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12412 else if (attr_form_is_section_offset (attr
))
12413 dwarf2_complex_location_expr_complaint ();
12414 else if (attr_form_is_block (attr
))
12415 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12417 dwarf2_complex_location_expr_complaint ();
12425 /* Add an aggregate field to the field list. */
12428 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12429 struct dwarf2_cu
*cu
)
12431 struct objfile
*objfile
= cu
->objfile
;
12432 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12433 struct nextfield
*new_field
;
12434 struct attribute
*attr
;
12436 const char *fieldname
= "";
12438 /* Allocate a new field list entry and link it in. */
12439 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
12440 make_cleanup (xfree
, new_field
);
12441 memset (new_field
, 0, sizeof (struct nextfield
));
12443 if (die
->tag
== DW_TAG_inheritance
)
12445 new_field
->next
= fip
->baseclasses
;
12446 fip
->baseclasses
= new_field
;
12450 new_field
->next
= fip
->fields
;
12451 fip
->fields
= new_field
;
12455 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12457 new_field
->accessibility
= DW_UNSND (attr
);
12459 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12460 if (new_field
->accessibility
!= DW_ACCESS_public
)
12461 fip
->non_public_fields
= 1;
12463 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12465 new_field
->virtuality
= DW_UNSND (attr
);
12467 new_field
->virtuality
= DW_VIRTUALITY_none
;
12469 fp
= &new_field
->field
;
12471 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12475 /* Data member other than a C++ static data member. */
12477 /* Get type of field. */
12478 fp
->type
= die_type (die
, cu
);
12480 SET_FIELD_BITPOS (*fp
, 0);
12482 /* Get bit size of field (zero if none). */
12483 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12486 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12490 FIELD_BITSIZE (*fp
) = 0;
12493 /* Get bit offset of field. */
12494 if (handle_data_member_location (die
, cu
, &offset
))
12495 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12496 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12499 if (gdbarch_bits_big_endian (gdbarch
))
12501 /* For big endian bits, the DW_AT_bit_offset gives the
12502 additional bit offset from the MSB of the containing
12503 anonymous object to the MSB of the field. We don't
12504 have to do anything special since we don't need to
12505 know the size of the anonymous object. */
12506 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12510 /* For little endian bits, compute the bit offset to the
12511 MSB of the anonymous object, subtract off the number of
12512 bits from the MSB of the field to the MSB of the
12513 object, and then subtract off the number of bits of
12514 the field itself. The result is the bit offset of
12515 the LSB of the field. */
12516 int anonymous_size
;
12517 int bit_offset
= DW_UNSND (attr
);
12519 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12522 /* The size of the anonymous object containing
12523 the bit field is explicit, so use the
12524 indicated size (in bytes). */
12525 anonymous_size
= DW_UNSND (attr
);
12529 /* The size of the anonymous object containing
12530 the bit field must be inferred from the type
12531 attribute of the data member containing the
12533 anonymous_size
= TYPE_LENGTH (fp
->type
);
12535 SET_FIELD_BITPOS (*fp
,
12536 (FIELD_BITPOS (*fp
)
12537 + anonymous_size
* bits_per_byte
12538 - bit_offset
- FIELD_BITSIZE (*fp
)));
12542 /* Get name of field. */
12543 fieldname
= dwarf2_name (die
, cu
);
12544 if (fieldname
== NULL
)
12547 /* The name is already allocated along with this objfile, so we don't
12548 need to duplicate it for the type. */
12549 fp
->name
= fieldname
;
12551 /* Change accessibility for artificial fields (e.g. virtual table
12552 pointer or virtual base class pointer) to private. */
12553 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12555 FIELD_ARTIFICIAL (*fp
) = 1;
12556 new_field
->accessibility
= DW_ACCESS_private
;
12557 fip
->non_public_fields
= 1;
12560 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12562 /* C++ static member. */
12564 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12565 is a declaration, but all versions of G++ as of this writing
12566 (so through at least 3.2.1) incorrectly generate
12567 DW_TAG_variable tags. */
12569 const char *physname
;
12571 /* Get name of field. */
12572 fieldname
= dwarf2_name (die
, cu
);
12573 if (fieldname
== NULL
)
12576 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12578 /* Only create a symbol if this is an external value.
12579 new_symbol checks this and puts the value in the global symbol
12580 table, which we want. If it is not external, new_symbol
12581 will try to put the value in cu->list_in_scope which is wrong. */
12582 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12584 /* A static const member, not much different than an enum as far as
12585 we're concerned, except that we can support more types. */
12586 new_symbol (die
, NULL
, cu
);
12589 /* Get physical name. */
12590 physname
= dwarf2_physname (fieldname
, die
, cu
);
12592 /* The name is already allocated along with this objfile, so we don't
12593 need to duplicate it for the type. */
12594 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12595 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12596 FIELD_NAME (*fp
) = fieldname
;
12598 else if (die
->tag
== DW_TAG_inheritance
)
12602 /* C++ base class field. */
12603 if (handle_data_member_location (die
, cu
, &offset
))
12604 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12605 FIELD_BITSIZE (*fp
) = 0;
12606 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12607 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12608 fip
->nbaseclasses
++;
12612 /* Add a typedef defined in the scope of the FIP's class. */
12615 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12616 struct dwarf2_cu
*cu
)
12618 struct objfile
*objfile
= cu
->objfile
;
12619 struct typedef_field_list
*new_field
;
12620 struct attribute
*attr
;
12621 struct typedef_field
*fp
;
12622 char *fieldname
= "";
12624 /* Allocate a new field list entry and link it in. */
12625 new_field
= xzalloc (sizeof (*new_field
));
12626 make_cleanup (xfree
, new_field
);
12628 gdb_assert (die
->tag
== DW_TAG_typedef
);
12630 fp
= &new_field
->field
;
12632 /* Get name of field. */
12633 fp
->name
= dwarf2_name (die
, cu
);
12634 if (fp
->name
== NULL
)
12637 fp
->type
= read_type_die (die
, cu
);
12639 new_field
->next
= fip
->typedef_field_list
;
12640 fip
->typedef_field_list
= new_field
;
12641 fip
->typedef_field_list_count
++;
12644 /* Create the vector of fields, and attach it to the type. */
12647 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12648 struct dwarf2_cu
*cu
)
12650 int nfields
= fip
->nfields
;
12652 /* Record the field count, allocate space for the array of fields,
12653 and create blank accessibility bitfields if necessary. */
12654 TYPE_NFIELDS (type
) = nfields
;
12655 TYPE_FIELDS (type
) = (struct field
*)
12656 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12657 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12659 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12661 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12663 TYPE_FIELD_PRIVATE_BITS (type
) =
12664 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12665 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12667 TYPE_FIELD_PROTECTED_BITS (type
) =
12668 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12669 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12671 TYPE_FIELD_IGNORE_BITS (type
) =
12672 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12673 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12676 /* If the type has baseclasses, allocate and clear a bit vector for
12677 TYPE_FIELD_VIRTUAL_BITS. */
12678 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12680 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12681 unsigned char *pointer
;
12683 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12684 pointer
= TYPE_ALLOC (type
, num_bytes
);
12685 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12686 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12687 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12690 /* Copy the saved-up fields into the field vector. Start from the head of
12691 the list, adding to the tail of the field array, so that they end up in
12692 the same order in the array in which they were added to the list. */
12693 while (nfields
-- > 0)
12695 struct nextfield
*fieldp
;
12699 fieldp
= fip
->fields
;
12700 fip
->fields
= fieldp
->next
;
12704 fieldp
= fip
->baseclasses
;
12705 fip
->baseclasses
= fieldp
->next
;
12708 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12709 switch (fieldp
->accessibility
)
12711 case DW_ACCESS_private
:
12712 if (cu
->language
!= language_ada
)
12713 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12716 case DW_ACCESS_protected
:
12717 if (cu
->language
!= language_ada
)
12718 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12721 case DW_ACCESS_public
:
12725 /* Unknown accessibility. Complain and treat it as public. */
12727 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12728 fieldp
->accessibility
);
12732 if (nfields
< fip
->nbaseclasses
)
12734 switch (fieldp
->virtuality
)
12736 case DW_VIRTUALITY_virtual
:
12737 case DW_VIRTUALITY_pure_virtual
:
12738 if (cu
->language
== language_ada
)
12739 error (_("unexpected virtuality in component of Ada type"));
12740 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
12747 /* Return true if this member function is a constructor, false
12751 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
12753 const char *fieldname
;
12754 const char *type_name
;
12757 if (die
->parent
== NULL
)
12760 if (die
->parent
->tag
!= DW_TAG_structure_type
12761 && die
->parent
->tag
!= DW_TAG_union_type
12762 && die
->parent
->tag
!= DW_TAG_class_type
)
12765 fieldname
= dwarf2_name (die
, cu
);
12766 type_name
= dwarf2_name (die
->parent
, cu
);
12767 if (fieldname
== NULL
|| type_name
== NULL
)
12770 len
= strlen (fieldname
);
12771 return (strncmp (fieldname
, type_name
, len
) == 0
12772 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
12775 /* Add a member function to the proper fieldlist. */
12778 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
12779 struct type
*type
, struct dwarf2_cu
*cu
)
12781 struct objfile
*objfile
= cu
->objfile
;
12782 struct attribute
*attr
;
12783 struct fnfieldlist
*flp
;
12785 struct fn_field
*fnp
;
12786 const char *fieldname
;
12787 struct nextfnfield
*new_fnfield
;
12788 struct type
*this_type
;
12789 enum dwarf_access_attribute accessibility
;
12791 if (cu
->language
== language_ada
)
12792 error (_("unexpected member function in Ada type"));
12794 /* Get name of member function. */
12795 fieldname
= dwarf2_name (die
, cu
);
12796 if (fieldname
== NULL
)
12799 /* Look up member function name in fieldlist. */
12800 for (i
= 0; i
< fip
->nfnfields
; i
++)
12802 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
12806 /* Create new list element if necessary. */
12807 if (i
< fip
->nfnfields
)
12808 flp
= &fip
->fnfieldlists
[i
];
12811 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
12813 fip
->fnfieldlists
= (struct fnfieldlist
*)
12814 xrealloc (fip
->fnfieldlists
,
12815 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
12816 * sizeof (struct fnfieldlist
));
12817 if (fip
->nfnfields
== 0)
12818 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
12820 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
12821 flp
->name
= fieldname
;
12824 i
= fip
->nfnfields
++;
12827 /* Create a new member function field and chain it to the field list
12829 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
12830 make_cleanup (xfree
, new_fnfield
);
12831 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
12832 new_fnfield
->next
= flp
->head
;
12833 flp
->head
= new_fnfield
;
12836 /* Fill in the member function field info. */
12837 fnp
= &new_fnfield
->fnfield
;
12839 /* Delay processing of the physname until later. */
12840 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
12842 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
12847 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
12848 fnp
->physname
= physname
? physname
: "";
12851 fnp
->type
= alloc_type (objfile
);
12852 this_type
= read_type_die (die
, cu
);
12853 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
12855 int nparams
= TYPE_NFIELDS (this_type
);
12857 /* TYPE is the domain of this method, and THIS_TYPE is the type
12858 of the method itself (TYPE_CODE_METHOD). */
12859 smash_to_method_type (fnp
->type
, type
,
12860 TYPE_TARGET_TYPE (this_type
),
12861 TYPE_FIELDS (this_type
),
12862 TYPE_NFIELDS (this_type
),
12863 TYPE_VARARGS (this_type
));
12865 /* Handle static member functions.
12866 Dwarf2 has no clean way to discern C++ static and non-static
12867 member functions. G++ helps GDB by marking the first
12868 parameter for non-static member functions (which is the this
12869 pointer) as artificial. We obtain this information from
12870 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12871 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
12872 fnp
->voffset
= VOFFSET_STATIC
;
12875 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
12876 dwarf2_full_name (fieldname
, die
, cu
));
12878 /* Get fcontext from DW_AT_containing_type if present. */
12879 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12880 fnp
->fcontext
= die_containing_type (die
, cu
);
12882 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12883 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12885 /* Get accessibility. */
12886 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12888 accessibility
= DW_UNSND (attr
);
12890 accessibility
= dwarf2_default_access_attribute (die
, cu
);
12891 switch (accessibility
)
12893 case DW_ACCESS_private
:
12894 fnp
->is_private
= 1;
12896 case DW_ACCESS_protected
:
12897 fnp
->is_protected
= 1;
12901 /* Check for artificial methods. */
12902 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
12903 if (attr
&& DW_UNSND (attr
) != 0)
12904 fnp
->is_artificial
= 1;
12906 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
12908 /* Get index in virtual function table if it is a virtual member
12909 function. For older versions of GCC, this is an offset in the
12910 appropriate virtual table, as specified by DW_AT_containing_type.
12911 For everyone else, it is an expression to be evaluated relative
12912 to the object address. */
12914 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
12917 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
12919 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
12921 /* Old-style GCC. */
12922 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
12924 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12925 || (DW_BLOCK (attr
)->size
> 1
12926 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
12927 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
12929 struct dwarf_block blk
;
12932 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12934 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
12935 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
12936 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12937 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12938 dwarf2_complex_location_expr_complaint ();
12940 fnp
->voffset
/= cu
->header
.addr_size
;
12944 dwarf2_complex_location_expr_complaint ();
12946 if (!fnp
->fcontext
)
12948 /* If there is no `this' field and no DW_AT_containing_type,
12949 we cannot actually find a base class context for the
12951 if (TYPE_NFIELDS (this_type
) == 0
12952 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
12954 complaint (&symfile_complaints
,
12955 _("cannot determine context for virtual member "
12956 "function \"%s\" (offset %d)"),
12957 fieldname
, die
->offset
.sect_off
);
12962 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
12966 else if (attr_form_is_section_offset (attr
))
12968 dwarf2_complex_location_expr_complaint ();
12972 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
12978 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12979 if (attr
&& DW_UNSND (attr
))
12981 /* GCC does this, as of 2008-08-25; PR debug/37237. */
12982 complaint (&symfile_complaints
,
12983 _("Member function \"%s\" (offset %d) is virtual "
12984 "but the vtable offset is not specified"),
12985 fieldname
, die
->offset
.sect_off
);
12986 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12987 TYPE_CPLUS_DYNAMIC (type
) = 1;
12992 /* Create the vector of member function fields, and attach it to the type. */
12995 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
12996 struct dwarf2_cu
*cu
)
12998 struct fnfieldlist
*flp
;
13001 if (cu
->language
== language_ada
)
13002 error (_("unexpected member functions in Ada type"));
13004 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13005 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
13006 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
13008 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
13010 struct nextfnfield
*nfp
= flp
->head
;
13011 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
13014 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
13015 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
13016 fn_flp
->fn_fields
= (struct fn_field
*)
13017 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
13018 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
13019 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
13022 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
13025 /* Returns non-zero if NAME is the name of a vtable member in CU's
13026 language, zero otherwise. */
13028 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
13030 static const char vptr
[] = "_vptr";
13031 static const char vtable
[] = "vtable";
13033 /* Look for the C++ and Java forms of the vtable. */
13034 if ((cu
->language
== language_java
13035 && startswith (name
, vtable
))
13036 || (startswith (name
, vptr
)
13037 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
13043 /* GCC outputs unnamed structures that are really pointers to member
13044 functions, with the ABI-specified layout. If TYPE describes
13045 such a structure, smash it into a member function type.
13047 GCC shouldn't do this; it should just output pointer to member DIEs.
13048 This is GCC PR debug/28767. */
13051 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13053 struct type
*pfn_type
, *self_type
, *new_type
;
13055 /* Check for a structure with no name and two children. */
13056 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13059 /* Check for __pfn and __delta members. */
13060 if (TYPE_FIELD_NAME (type
, 0) == NULL
13061 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13062 || TYPE_FIELD_NAME (type
, 1) == NULL
13063 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13066 /* Find the type of the method. */
13067 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13068 if (pfn_type
== NULL
13069 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13070 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13073 /* Look for the "this" argument. */
13074 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13075 if (TYPE_NFIELDS (pfn_type
) == 0
13076 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13077 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13080 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13081 new_type
= alloc_type (objfile
);
13082 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13083 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13084 TYPE_VARARGS (pfn_type
));
13085 smash_to_methodptr_type (type
, new_type
);
13088 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
13092 producer_is_icc (struct dwarf2_cu
*cu
)
13094 if (!cu
->checked_producer
)
13095 check_producer (cu
);
13097 return cu
->producer_is_icc
;
13100 /* Called when we find the DIE that starts a structure or union scope
13101 (definition) to create a type for the structure or union. Fill in
13102 the type's name and general properties; the members will not be
13103 processed until process_structure_scope. A symbol table entry for
13104 the type will also not be done until process_structure_scope (assuming
13105 the type has a name).
13107 NOTE: we need to call these functions regardless of whether or not the
13108 DIE has a DW_AT_name attribute, since it might be an anonymous
13109 structure or union. This gets the type entered into our set of
13110 user defined types. */
13112 static struct type
*
13113 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13115 struct objfile
*objfile
= cu
->objfile
;
13117 struct attribute
*attr
;
13120 /* If the definition of this type lives in .debug_types, read that type.
13121 Don't follow DW_AT_specification though, that will take us back up
13122 the chain and we want to go down. */
13123 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13126 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13128 /* The type's CU may not be the same as CU.
13129 Ensure TYPE is recorded with CU in die_type_hash. */
13130 return set_die_type (die
, type
, cu
);
13133 type
= alloc_type (objfile
);
13134 INIT_CPLUS_SPECIFIC (type
);
13136 name
= dwarf2_name (die
, cu
);
13139 if (cu
->language
== language_cplus
13140 || cu
->language
== language_java
)
13142 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13144 /* dwarf2_full_name might have already finished building the DIE's
13145 type. If so, there is no need to continue. */
13146 if (get_die_type (die
, cu
) != NULL
)
13147 return get_die_type (die
, cu
);
13149 TYPE_TAG_NAME (type
) = full_name
;
13150 if (die
->tag
== DW_TAG_structure_type
13151 || die
->tag
== DW_TAG_class_type
)
13152 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13156 /* The name is already allocated along with this objfile, so
13157 we don't need to duplicate it for the type. */
13158 TYPE_TAG_NAME (type
) = name
;
13159 if (die
->tag
== DW_TAG_class_type
)
13160 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13164 if (die
->tag
== DW_TAG_structure_type
)
13166 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13168 else if (die
->tag
== DW_TAG_union_type
)
13170 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13174 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13177 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13178 TYPE_DECLARED_CLASS (type
) = 1;
13180 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13183 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13187 TYPE_LENGTH (type
) = 0;
13190 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13192 /* ICC does not output the required DW_AT_declaration
13193 on incomplete types, but gives them a size of zero. */
13194 TYPE_STUB (type
) = 1;
13197 TYPE_STUB_SUPPORTED (type
) = 1;
13199 if (die_is_declaration (die
, cu
))
13200 TYPE_STUB (type
) = 1;
13201 else if (attr
== NULL
&& die
->child
== NULL
13202 && producer_is_realview (cu
->producer
))
13203 /* RealView does not output the required DW_AT_declaration
13204 on incomplete types. */
13205 TYPE_STUB (type
) = 1;
13207 /* We need to add the type field to the die immediately so we don't
13208 infinitely recurse when dealing with pointers to the structure
13209 type within the structure itself. */
13210 set_die_type (die
, type
, cu
);
13212 /* set_die_type should be already done. */
13213 set_descriptive_type (type
, die
, cu
);
13218 /* Finish creating a structure or union type, including filling in
13219 its members and creating a symbol for it. */
13222 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13224 struct objfile
*objfile
= cu
->objfile
;
13225 struct die_info
*child_die
;
13228 type
= get_die_type (die
, cu
);
13230 type
= read_structure_type (die
, cu
);
13232 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13234 struct field_info fi
;
13235 VEC (symbolp
) *template_args
= NULL
;
13236 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13238 memset (&fi
, 0, sizeof (struct field_info
));
13240 child_die
= die
->child
;
13242 while (child_die
&& child_die
->tag
)
13244 if (child_die
->tag
== DW_TAG_member
13245 || child_die
->tag
== DW_TAG_variable
)
13247 /* NOTE: carlton/2002-11-05: A C++ static data member
13248 should be a DW_TAG_member that is a declaration, but
13249 all versions of G++ as of this writing (so through at
13250 least 3.2.1) incorrectly generate DW_TAG_variable
13251 tags for them instead. */
13252 dwarf2_add_field (&fi
, child_die
, cu
);
13254 else if (child_die
->tag
== DW_TAG_subprogram
)
13256 /* C++ member function. */
13257 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13259 else if (child_die
->tag
== DW_TAG_inheritance
)
13261 /* C++ base class field. */
13262 dwarf2_add_field (&fi
, child_die
, cu
);
13264 else if (child_die
->tag
== DW_TAG_typedef
)
13265 dwarf2_add_typedef (&fi
, child_die
, cu
);
13266 else if (child_die
->tag
== DW_TAG_template_type_param
13267 || child_die
->tag
== DW_TAG_template_value_param
)
13269 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13272 VEC_safe_push (symbolp
, template_args
, arg
);
13275 child_die
= sibling_die (child_die
);
13278 /* Attach template arguments to type. */
13279 if (! VEC_empty (symbolp
, template_args
))
13281 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13282 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13283 = VEC_length (symbolp
, template_args
);
13284 TYPE_TEMPLATE_ARGUMENTS (type
)
13285 = obstack_alloc (&objfile
->objfile_obstack
,
13286 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13287 * sizeof (struct symbol
*)));
13288 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13289 VEC_address (symbolp
, template_args
),
13290 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13291 * sizeof (struct symbol
*)));
13292 VEC_free (symbolp
, template_args
);
13295 /* Attach fields and member functions to the type. */
13297 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13300 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13302 /* Get the type which refers to the base class (possibly this
13303 class itself) which contains the vtable pointer for the current
13304 class from the DW_AT_containing_type attribute. This use of
13305 DW_AT_containing_type is a GNU extension. */
13307 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13309 struct type
*t
= die_containing_type (die
, cu
);
13311 set_type_vptr_basetype (type
, t
);
13316 /* Our own class provides vtbl ptr. */
13317 for (i
= TYPE_NFIELDS (t
) - 1;
13318 i
>= TYPE_N_BASECLASSES (t
);
13321 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13323 if (is_vtable_name (fieldname
, cu
))
13325 set_type_vptr_fieldno (type
, i
);
13330 /* Complain if virtual function table field not found. */
13331 if (i
< TYPE_N_BASECLASSES (t
))
13332 complaint (&symfile_complaints
,
13333 _("virtual function table pointer "
13334 "not found when defining class '%s'"),
13335 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13340 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13343 else if (cu
->producer
13344 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
13346 /* The IBM XLC compiler does not provide direct indication
13347 of the containing type, but the vtable pointer is
13348 always named __vfp. */
13352 for (i
= TYPE_NFIELDS (type
) - 1;
13353 i
>= TYPE_N_BASECLASSES (type
);
13356 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13358 set_type_vptr_fieldno (type
, i
);
13359 set_type_vptr_basetype (type
, type
);
13366 /* Copy fi.typedef_field_list linked list elements content into the
13367 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13368 if (fi
.typedef_field_list
)
13370 int i
= fi
.typedef_field_list_count
;
13372 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13373 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13374 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
13375 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13377 /* Reverse the list order to keep the debug info elements order. */
13380 struct typedef_field
*dest
, *src
;
13382 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13383 src
= &fi
.typedef_field_list
->field
;
13384 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13389 do_cleanups (back_to
);
13391 if (HAVE_CPLUS_STRUCT (type
))
13392 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
13395 quirk_gcc_member_function_pointer (type
, objfile
);
13397 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13398 snapshots) has been known to create a die giving a declaration
13399 for a class that has, as a child, a die giving a definition for a
13400 nested class. So we have to process our children even if the
13401 current die is a declaration. Normally, of course, a declaration
13402 won't have any children at all. */
13404 child_die
= die
->child
;
13406 while (child_die
!= NULL
&& child_die
->tag
)
13408 if (child_die
->tag
== DW_TAG_member
13409 || child_die
->tag
== DW_TAG_variable
13410 || child_die
->tag
== DW_TAG_inheritance
13411 || child_die
->tag
== DW_TAG_template_value_param
13412 || child_die
->tag
== DW_TAG_template_type_param
)
13417 process_die (child_die
, cu
);
13419 child_die
= sibling_die (child_die
);
13422 /* Do not consider external references. According to the DWARF standard,
13423 these DIEs are identified by the fact that they have no byte_size
13424 attribute, and a declaration attribute. */
13425 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13426 || !die_is_declaration (die
, cu
))
13427 new_symbol (die
, type
, cu
);
13430 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13431 update TYPE using some information only available in DIE's children. */
13434 update_enumeration_type_from_children (struct die_info
*die
,
13436 struct dwarf2_cu
*cu
)
13438 struct obstack obstack
;
13439 struct die_info
*child_die
;
13440 int unsigned_enum
= 1;
13443 struct cleanup
*old_chain
;
13445 obstack_init (&obstack
);
13446 old_chain
= make_cleanup_obstack_free (&obstack
);
13448 for (child_die
= die
->child
;
13449 child_die
!= NULL
&& child_die
->tag
;
13450 child_die
= sibling_die (child_die
))
13452 struct attribute
*attr
;
13454 const gdb_byte
*bytes
;
13455 struct dwarf2_locexpr_baton
*baton
;
13458 if (child_die
->tag
!= DW_TAG_enumerator
)
13461 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13465 name
= dwarf2_name (child_die
, cu
);
13467 name
= "<anonymous enumerator>";
13469 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13470 &value
, &bytes
, &baton
);
13476 else if ((mask
& value
) != 0)
13481 /* If we already know that the enum type is neither unsigned, nor
13482 a flag type, no need to look at the rest of the enumerates. */
13483 if (!unsigned_enum
&& !flag_enum
)
13488 TYPE_UNSIGNED (type
) = 1;
13490 TYPE_FLAG_ENUM (type
) = 1;
13492 do_cleanups (old_chain
);
13495 /* Given a DW_AT_enumeration_type die, set its type. We do not
13496 complete the type's fields yet, or create any symbols. */
13498 static struct type
*
13499 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13501 struct objfile
*objfile
= cu
->objfile
;
13503 struct attribute
*attr
;
13506 /* If the definition of this type lives in .debug_types, read that type.
13507 Don't follow DW_AT_specification though, that will take us back up
13508 the chain and we want to go down. */
13509 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13512 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13514 /* The type's CU may not be the same as CU.
13515 Ensure TYPE is recorded with CU in die_type_hash. */
13516 return set_die_type (die
, type
, cu
);
13519 type
= alloc_type (objfile
);
13521 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13522 name
= dwarf2_full_name (NULL
, die
, cu
);
13524 TYPE_TAG_NAME (type
) = name
;
13526 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13529 struct type
*underlying_type
= die_type (die
, cu
);
13531 TYPE_TARGET_TYPE (type
) = underlying_type
;
13534 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13537 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13541 TYPE_LENGTH (type
) = 0;
13544 /* The enumeration DIE can be incomplete. In Ada, any type can be
13545 declared as private in the package spec, and then defined only
13546 inside the package body. Such types are known as Taft Amendment
13547 Types. When another package uses such a type, an incomplete DIE
13548 may be generated by the compiler. */
13549 if (die_is_declaration (die
, cu
))
13550 TYPE_STUB (type
) = 1;
13552 /* Finish the creation of this type by using the enum's children.
13553 We must call this even when the underlying type has been provided
13554 so that we can determine if we're looking at a "flag" enum. */
13555 update_enumeration_type_from_children (die
, type
, cu
);
13557 /* If this type has an underlying type that is not a stub, then we
13558 may use its attributes. We always use the "unsigned" attribute
13559 in this situation, because ordinarily we guess whether the type
13560 is unsigned -- but the guess can be wrong and the underlying type
13561 can tell us the reality. However, we defer to a local size
13562 attribute if one exists, because this lets the compiler override
13563 the underlying type if needed. */
13564 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13566 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13567 if (TYPE_LENGTH (type
) == 0)
13568 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13571 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13573 return set_die_type (die
, type
, cu
);
13576 /* Given a pointer to a die which begins an enumeration, process all
13577 the dies that define the members of the enumeration, and create the
13578 symbol for the enumeration type.
13580 NOTE: We reverse the order of the element list. */
13583 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13585 struct type
*this_type
;
13587 this_type
= get_die_type (die
, cu
);
13588 if (this_type
== NULL
)
13589 this_type
= read_enumeration_type (die
, cu
);
13591 if (die
->child
!= NULL
)
13593 struct die_info
*child_die
;
13594 struct symbol
*sym
;
13595 struct field
*fields
= NULL
;
13596 int num_fields
= 0;
13599 child_die
= die
->child
;
13600 while (child_die
&& child_die
->tag
)
13602 if (child_die
->tag
!= DW_TAG_enumerator
)
13604 process_die (child_die
, cu
);
13608 name
= dwarf2_name (child_die
, cu
);
13611 sym
= new_symbol (child_die
, this_type
, cu
);
13613 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13615 fields
= (struct field
*)
13617 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13618 * sizeof (struct field
));
13621 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13622 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13623 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13624 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13630 child_die
= sibling_die (child_die
);
13635 TYPE_NFIELDS (this_type
) = num_fields
;
13636 TYPE_FIELDS (this_type
) = (struct field
*)
13637 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13638 memcpy (TYPE_FIELDS (this_type
), fields
,
13639 sizeof (struct field
) * num_fields
);
13644 /* If we are reading an enum from a .debug_types unit, and the enum
13645 is a declaration, and the enum is not the signatured type in the
13646 unit, then we do not want to add a symbol for it. Adding a
13647 symbol would in some cases obscure the true definition of the
13648 enum, giving users an incomplete type when the definition is
13649 actually available. Note that we do not want to do this for all
13650 enums which are just declarations, because C++0x allows forward
13651 enum declarations. */
13652 if (cu
->per_cu
->is_debug_types
13653 && die_is_declaration (die
, cu
))
13655 struct signatured_type
*sig_type
;
13657 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13658 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13659 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13663 new_symbol (die
, this_type
, cu
);
13666 /* Extract all information from a DW_TAG_array_type DIE and put it in
13667 the DIE's type field. For now, this only handles one dimensional
13670 static struct type
*
13671 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13673 struct objfile
*objfile
= cu
->objfile
;
13674 struct die_info
*child_die
;
13676 struct type
*element_type
, *range_type
, *index_type
;
13677 struct type
**range_types
= NULL
;
13678 struct attribute
*attr
;
13680 struct cleanup
*back_to
;
13682 unsigned int bit_stride
= 0;
13684 element_type
= die_type (die
, cu
);
13686 /* The die_type call above may have already set the type for this DIE. */
13687 type
= get_die_type (die
, cu
);
13691 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13693 bit_stride
= DW_UNSND (attr
) * 8;
13695 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13697 bit_stride
= DW_UNSND (attr
);
13699 /* Irix 6.2 native cc creates array types without children for
13700 arrays with unspecified length. */
13701 if (die
->child
== NULL
)
13703 index_type
= objfile_type (objfile
)->builtin_int
;
13704 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13705 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13707 return set_die_type (die
, type
, cu
);
13710 back_to
= make_cleanup (null_cleanup
, NULL
);
13711 child_die
= die
->child
;
13712 while (child_die
&& child_die
->tag
)
13714 if (child_die
->tag
== DW_TAG_subrange_type
)
13716 struct type
*child_type
= read_type_die (child_die
, cu
);
13718 if (child_type
!= NULL
)
13720 /* The range type was succesfully read. Save it for the
13721 array type creation. */
13722 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13724 range_types
= (struct type
**)
13725 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13726 * sizeof (struct type
*));
13728 make_cleanup (free_current_contents
, &range_types
);
13730 range_types
[ndim
++] = child_type
;
13733 child_die
= sibling_die (child_die
);
13736 /* Dwarf2 dimensions are output from left to right, create the
13737 necessary array types in backwards order. */
13739 type
= element_type
;
13741 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13746 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13752 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13756 /* Understand Dwarf2 support for vector types (like they occur on
13757 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13758 array type. This is not part of the Dwarf2/3 standard yet, but a
13759 custom vendor extension. The main difference between a regular
13760 array and the vector variant is that vectors are passed by value
13762 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13764 make_vector_type (type
);
13766 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13767 implementation may choose to implement triple vectors using this
13769 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13772 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13773 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13775 complaint (&symfile_complaints
,
13776 _("DW_AT_byte_size for array type smaller "
13777 "than the total size of elements"));
13780 name
= dwarf2_name (die
, cu
);
13782 TYPE_NAME (type
) = name
;
13784 /* Install the type in the die. */
13785 set_die_type (die
, type
, cu
);
13787 /* set_die_type should be already done. */
13788 set_descriptive_type (type
, die
, cu
);
13790 do_cleanups (back_to
);
13795 static enum dwarf_array_dim_ordering
13796 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13798 struct attribute
*attr
;
13800 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13802 if (attr
) return DW_SND (attr
);
13804 /* GNU F77 is a special case, as at 08/2004 array type info is the
13805 opposite order to the dwarf2 specification, but data is still
13806 laid out as per normal fortran.
13808 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13809 version checking. */
13811 if (cu
->language
== language_fortran
13812 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13814 return DW_ORD_row_major
;
13817 switch (cu
->language_defn
->la_array_ordering
)
13819 case array_column_major
:
13820 return DW_ORD_col_major
;
13821 case array_row_major
:
13823 return DW_ORD_row_major
;
13827 /* Extract all information from a DW_TAG_set_type DIE and put it in
13828 the DIE's type field. */
13830 static struct type
*
13831 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13833 struct type
*domain_type
, *set_type
;
13834 struct attribute
*attr
;
13836 domain_type
= die_type (die
, cu
);
13838 /* The die_type call above may have already set the type for this DIE. */
13839 set_type
= get_die_type (die
, cu
);
13843 set_type
= create_set_type (NULL
, domain_type
);
13845 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13847 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13849 return set_die_type (die
, set_type
, cu
);
13852 /* A helper for read_common_block that creates a locexpr baton.
13853 SYM is the symbol which we are marking as computed.
13854 COMMON_DIE is the DIE for the common block.
13855 COMMON_LOC is the location expression attribute for the common
13857 MEMBER_LOC is the location expression attribute for the particular
13858 member of the common block that we are processing.
13859 CU is the CU from which the above come. */
13862 mark_common_block_symbol_computed (struct symbol
*sym
,
13863 struct die_info
*common_die
,
13864 struct attribute
*common_loc
,
13865 struct attribute
*member_loc
,
13866 struct dwarf2_cu
*cu
)
13868 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13869 struct dwarf2_locexpr_baton
*baton
;
13871 unsigned int cu_off
;
13872 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13873 LONGEST offset
= 0;
13875 gdb_assert (common_loc
&& member_loc
);
13876 gdb_assert (attr_form_is_block (common_loc
));
13877 gdb_assert (attr_form_is_block (member_loc
)
13878 || attr_form_is_constant (member_loc
));
13880 baton
= obstack_alloc (&objfile
->objfile_obstack
,
13881 sizeof (struct dwarf2_locexpr_baton
));
13882 baton
->per_cu
= cu
->per_cu
;
13883 gdb_assert (baton
->per_cu
);
13885 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13887 if (attr_form_is_constant (member_loc
))
13889 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13890 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13893 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13895 ptr
= obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13898 *ptr
++ = DW_OP_call4
;
13899 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13900 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13903 if (attr_form_is_constant (member_loc
))
13905 *ptr
++ = DW_OP_addr
;
13906 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13907 ptr
+= cu
->header
.addr_size
;
13911 /* We have to copy the data here, because DW_OP_call4 will only
13912 use a DW_AT_location attribute. */
13913 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13914 ptr
+= DW_BLOCK (member_loc
)->size
;
13917 *ptr
++ = DW_OP_plus
;
13918 gdb_assert (ptr
- baton
->data
== baton
->size
);
13920 SYMBOL_LOCATION_BATON (sym
) = baton
;
13921 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
13924 /* Create appropriate locally-scoped variables for all the
13925 DW_TAG_common_block entries. Also create a struct common_block
13926 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13927 is used to sepate the common blocks name namespace from regular
13931 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
13933 struct attribute
*attr
;
13935 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13938 /* Support the .debug_loc offsets. */
13939 if (attr_form_is_block (attr
))
13943 else if (attr_form_is_section_offset (attr
))
13945 dwarf2_complex_location_expr_complaint ();
13950 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13951 "common block member");
13956 if (die
->child
!= NULL
)
13958 struct objfile
*objfile
= cu
->objfile
;
13959 struct die_info
*child_die
;
13960 size_t n_entries
= 0, size
;
13961 struct common_block
*common_block
;
13962 struct symbol
*sym
;
13964 for (child_die
= die
->child
;
13965 child_die
&& child_die
->tag
;
13966 child_die
= sibling_die (child_die
))
13969 size
= (sizeof (struct common_block
)
13970 + (n_entries
- 1) * sizeof (struct symbol
*));
13971 common_block
= obstack_alloc (&objfile
->objfile_obstack
, size
);
13972 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
13973 common_block
->n_entries
= 0;
13975 for (child_die
= die
->child
;
13976 child_die
&& child_die
->tag
;
13977 child_die
= sibling_die (child_die
))
13979 /* Create the symbol in the DW_TAG_common_block block in the current
13981 sym
= new_symbol (child_die
, NULL
, cu
);
13984 struct attribute
*member_loc
;
13986 common_block
->contents
[common_block
->n_entries
++] = sym
;
13988 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
13992 /* GDB has handled this for a long time, but it is
13993 not specified by DWARF. It seems to have been
13994 emitted by gfortran at least as recently as:
13995 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
13996 complaint (&symfile_complaints
,
13997 _("Variable in common block has "
13998 "DW_AT_data_member_location "
13999 "- DIE at 0x%x [in module %s]"),
14000 child_die
->offset
.sect_off
,
14001 objfile_name (cu
->objfile
));
14003 if (attr_form_is_section_offset (member_loc
))
14004 dwarf2_complex_location_expr_complaint ();
14005 else if (attr_form_is_constant (member_loc
)
14006 || attr_form_is_block (member_loc
))
14009 mark_common_block_symbol_computed (sym
, die
, attr
,
14013 dwarf2_complex_location_expr_complaint ();
14018 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
14019 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
14023 /* Create a type for a C++ namespace. */
14025 static struct type
*
14026 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14028 struct objfile
*objfile
= cu
->objfile
;
14029 const char *previous_prefix
, *name
;
14033 /* For extensions, reuse the type of the original namespace. */
14034 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
14036 struct die_info
*ext_die
;
14037 struct dwarf2_cu
*ext_cu
= cu
;
14039 ext_die
= dwarf2_extension (die
, &ext_cu
);
14040 type
= read_type_die (ext_die
, ext_cu
);
14042 /* EXT_CU may not be the same as CU.
14043 Ensure TYPE is recorded with CU in die_type_hash. */
14044 return set_die_type (die
, type
, cu
);
14047 name
= namespace_name (die
, &is_anonymous
, cu
);
14049 /* Now build the name of the current namespace. */
14051 previous_prefix
= determine_prefix (die
, cu
);
14052 if (previous_prefix
[0] != '\0')
14053 name
= typename_concat (&objfile
->objfile_obstack
,
14054 previous_prefix
, name
, 0, cu
);
14056 /* Create the type. */
14057 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
14059 TYPE_NAME (type
) = name
;
14060 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14062 return set_die_type (die
, type
, cu
);
14065 /* Read a C++ namespace. */
14068 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14070 struct objfile
*objfile
= cu
->objfile
;
14073 /* Add a symbol associated to this if we haven't seen the namespace
14074 before. Also, add a using directive if it's an anonymous
14077 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14081 type
= read_type_die (die
, cu
);
14082 new_symbol (die
, type
, cu
);
14084 namespace_name (die
, &is_anonymous
, cu
);
14087 const char *previous_prefix
= determine_prefix (die
, cu
);
14089 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
14090 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
14094 if (die
->child
!= NULL
)
14096 struct die_info
*child_die
= die
->child
;
14098 while (child_die
&& child_die
->tag
)
14100 process_die (child_die
, cu
);
14101 child_die
= sibling_die (child_die
);
14106 /* Read a Fortran module as type. This DIE can be only a declaration used for
14107 imported module. Still we need that type as local Fortran "use ... only"
14108 declaration imports depend on the created type in determine_prefix. */
14110 static struct type
*
14111 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14113 struct objfile
*objfile
= cu
->objfile
;
14114 const char *module_name
;
14117 module_name
= dwarf2_name (die
, cu
);
14119 complaint (&symfile_complaints
,
14120 _("DW_TAG_module has no name, offset 0x%x"),
14121 die
->offset
.sect_off
);
14122 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
14124 /* determine_prefix uses TYPE_TAG_NAME. */
14125 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14127 return set_die_type (die
, type
, cu
);
14130 /* Read a Fortran module. */
14133 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14135 struct die_info
*child_die
= die
->child
;
14138 type
= read_type_die (die
, cu
);
14139 new_symbol (die
, type
, cu
);
14141 while (child_die
&& child_die
->tag
)
14143 process_die (child_die
, cu
);
14144 child_die
= sibling_die (child_die
);
14148 /* Return the name of the namespace represented by DIE. Set
14149 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14152 static const char *
14153 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14155 struct die_info
*current_die
;
14156 const char *name
= NULL
;
14158 /* Loop through the extensions until we find a name. */
14160 for (current_die
= die
;
14161 current_die
!= NULL
;
14162 current_die
= dwarf2_extension (die
, &cu
))
14164 /* We don't use dwarf2_name here so that we can detect the absence
14165 of a name -> anonymous namespace. */
14166 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
14169 name
= DW_STRING (attr
);
14174 /* Is it an anonymous namespace? */
14176 *is_anonymous
= (name
== NULL
);
14178 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14183 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14184 the user defined type vector. */
14186 static struct type
*
14187 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14189 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14190 struct comp_unit_head
*cu_header
= &cu
->header
;
14192 struct attribute
*attr_byte_size
;
14193 struct attribute
*attr_address_class
;
14194 int byte_size
, addr_class
;
14195 struct type
*target_type
;
14197 target_type
= die_type (die
, cu
);
14199 /* The die_type call above may have already set the type for this DIE. */
14200 type
= get_die_type (die
, cu
);
14204 type
= lookup_pointer_type (target_type
);
14206 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14207 if (attr_byte_size
)
14208 byte_size
= DW_UNSND (attr_byte_size
);
14210 byte_size
= cu_header
->addr_size
;
14212 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14213 if (attr_address_class
)
14214 addr_class
= DW_UNSND (attr_address_class
);
14216 addr_class
= DW_ADDR_none
;
14218 /* If the pointer size or address class is different than the
14219 default, create a type variant marked as such and set the
14220 length accordingly. */
14221 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14223 if (gdbarch_address_class_type_flags_p (gdbarch
))
14227 type_flags
= gdbarch_address_class_type_flags
14228 (gdbarch
, byte_size
, addr_class
);
14229 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14231 type
= make_type_with_address_space (type
, type_flags
);
14233 else if (TYPE_LENGTH (type
) != byte_size
)
14235 complaint (&symfile_complaints
,
14236 _("invalid pointer size %d"), byte_size
);
14240 /* Should we also complain about unhandled address classes? */
14244 TYPE_LENGTH (type
) = byte_size
;
14245 return set_die_type (die
, type
, cu
);
14248 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14249 the user defined type vector. */
14251 static struct type
*
14252 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14255 struct type
*to_type
;
14256 struct type
*domain
;
14258 to_type
= die_type (die
, cu
);
14259 domain
= die_containing_type (die
, cu
);
14261 /* The calls above may have already set the type for this DIE. */
14262 type
= get_die_type (die
, cu
);
14266 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14267 type
= lookup_methodptr_type (to_type
);
14268 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14270 struct type
*new_type
= alloc_type (cu
->objfile
);
14272 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14273 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14274 TYPE_VARARGS (to_type
));
14275 type
= lookup_methodptr_type (new_type
);
14278 type
= lookup_memberptr_type (to_type
, domain
);
14280 return set_die_type (die
, type
, cu
);
14283 /* Extract all information from a DW_TAG_reference_type DIE and add to
14284 the user defined type vector. */
14286 static struct type
*
14287 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14289 struct comp_unit_head
*cu_header
= &cu
->header
;
14290 struct type
*type
, *target_type
;
14291 struct attribute
*attr
;
14293 target_type
= die_type (die
, cu
);
14295 /* The die_type call above may have already set the type for this DIE. */
14296 type
= get_die_type (die
, cu
);
14300 type
= lookup_reference_type (target_type
);
14301 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14304 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14308 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14310 return set_die_type (die
, type
, cu
);
14313 /* Add the given cv-qualifiers to the element type of the array. GCC
14314 outputs DWARF type qualifiers that apply to an array, not the
14315 element type. But GDB relies on the array element type to carry
14316 the cv-qualifiers. This mimics section 6.7.3 of the C99
14319 static struct type
*
14320 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14321 struct type
*base_type
, int cnst
, int voltl
)
14323 struct type
*el_type
, *inner_array
;
14325 base_type
= copy_type (base_type
);
14326 inner_array
= base_type
;
14328 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14330 TYPE_TARGET_TYPE (inner_array
) =
14331 copy_type (TYPE_TARGET_TYPE (inner_array
));
14332 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14335 el_type
= TYPE_TARGET_TYPE (inner_array
);
14336 cnst
|= TYPE_CONST (el_type
);
14337 voltl
|= TYPE_VOLATILE (el_type
);
14338 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14340 return set_die_type (die
, base_type
, cu
);
14343 static struct type
*
14344 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14346 struct type
*base_type
, *cv_type
;
14348 base_type
= die_type (die
, cu
);
14350 /* The die_type call above may have already set the type for this DIE. */
14351 cv_type
= get_die_type (die
, cu
);
14355 /* In case the const qualifier is applied to an array type, the element type
14356 is so qualified, not the array type (section 6.7.3 of C99). */
14357 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14358 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14360 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14361 return set_die_type (die
, cv_type
, cu
);
14364 static struct type
*
14365 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14367 struct type
*base_type
, *cv_type
;
14369 base_type
= die_type (die
, cu
);
14371 /* The die_type call above may have already set the type for this DIE. */
14372 cv_type
= get_die_type (die
, cu
);
14376 /* In case the volatile qualifier is applied to an array type, the
14377 element type is so qualified, not the array type (section 6.7.3
14379 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14380 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14382 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14383 return set_die_type (die
, cv_type
, cu
);
14386 /* Handle DW_TAG_restrict_type. */
14388 static struct type
*
14389 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14391 struct type
*base_type
, *cv_type
;
14393 base_type
= die_type (die
, cu
);
14395 /* The die_type call above may have already set the type for this DIE. */
14396 cv_type
= get_die_type (die
, cu
);
14400 cv_type
= make_restrict_type (base_type
);
14401 return set_die_type (die
, cv_type
, cu
);
14404 /* Handle DW_TAG_atomic_type. */
14406 static struct type
*
14407 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14409 struct type
*base_type
, *cv_type
;
14411 base_type
= die_type (die
, cu
);
14413 /* The die_type call above may have already set the type for this DIE. */
14414 cv_type
= get_die_type (die
, cu
);
14418 cv_type
= make_atomic_type (base_type
);
14419 return set_die_type (die
, cv_type
, cu
);
14422 /* Extract all information from a DW_TAG_string_type DIE and add to
14423 the user defined type vector. It isn't really a user defined type,
14424 but it behaves like one, with other DIE's using an AT_user_def_type
14425 attribute to reference it. */
14427 static struct type
*
14428 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14430 struct objfile
*objfile
= cu
->objfile
;
14431 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14432 struct type
*type
, *range_type
, *index_type
, *char_type
;
14433 struct attribute
*attr
;
14434 unsigned int length
;
14436 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14439 length
= DW_UNSND (attr
);
14443 /* Check for the DW_AT_byte_size attribute. */
14444 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14447 length
= DW_UNSND (attr
);
14455 index_type
= objfile_type (objfile
)->builtin_int
;
14456 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14457 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14458 type
= create_string_type (NULL
, char_type
, range_type
);
14460 return set_die_type (die
, type
, cu
);
14463 /* Assuming that DIE corresponds to a function, returns nonzero
14464 if the function is prototyped. */
14467 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14469 struct attribute
*attr
;
14471 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14472 if (attr
&& (DW_UNSND (attr
) != 0))
14475 /* The DWARF standard implies that the DW_AT_prototyped attribute
14476 is only meaninful for C, but the concept also extends to other
14477 languages that allow unprototyped functions (Eg: Objective C).
14478 For all other languages, assume that functions are always
14480 if (cu
->language
!= language_c
14481 && cu
->language
!= language_objc
14482 && cu
->language
!= language_opencl
)
14485 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14486 prototyped and unprototyped functions; default to prototyped,
14487 since that is more common in modern code (and RealView warns
14488 about unprototyped functions). */
14489 if (producer_is_realview (cu
->producer
))
14495 /* Handle DIES due to C code like:
14499 int (*funcp)(int a, long l);
14503 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14505 static struct type
*
14506 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14508 struct objfile
*objfile
= cu
->objfile
;
14509 struct type
*type
; /* Type that this function returns. */
14510 struct type
*ftype
; /* Function that returns above type. */
14511 struct attribute
*attr
;
14513 type
= die_type (die
, cu
);
14515 /* The die_type call above may have already set the type for this DIE. */
14516 ftype
= get_die_type (die
, cu
);
14520 ftype
= lookup_function_type (type
);
14522 if (prototyped_function_p (die
, cu
))
14523 TYPE_PROTOTYPED (ftype
) = 1;
14525 /* Store the calling convention in the type if it's available in
14526 the subroutine die. Otherwise set the calling convention to
14527 the default value DW_CC_normal. */
14528 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14530 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14531 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14532 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14534 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14536 /* Record whether the function returns normally to its caller or not
14537 if the DWARF producer set that information. */
14538 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
14539 if (attr
&& (DW_UNSND (attr
) != 0))
14540 TYPE_NO_RETURN (ftype
) = 1;
14542 /* We need to add the subroutine type to the die immediately so
14543 we don't infinitely recurse when dealing with parameters
14544 declared as the same subroutine type. */
14545 set_die_type (die
, ftype
, cu
);
14547 if (die
->child
!= NULL
)
14549 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14550 struct die_info
*child_die
;
14551 int nparams
, iparams
;
14553 /* Count the number of parameters.
14554 FIXME: GDB currently ignores vararg functions, but knows about
14555 vararg member functions. */
14557 child_die
= die
->child
;
14558 while (child_die
&& child_die
->tag
)
14560 if (child_die
->tag
== DW_TAG_formal_parameter
)
14562 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14563 TYPE_VARARGS (ftype
) = 1;
14564 child_die
= sibling_die (child_die
);
14567 /* Allocate storage for parameters and fill them in. */
14568 TYPE_NFIELDS (ftype
) = nparams
;
14569 TYPE_FIELDS (ftype
) = (struct field
*)
14570 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14572 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14573 even if we error out during the parameters reading below. */
14574 for (iparams
= 0; iparams
< nparams
; iparams
++)
14575 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14578 child_die
= die
->child
;
14579 while (child_die
&& child_die
->tag
)
14581 if (child_die
->tag
== DW_TAG_formal_parameter
)
14583 struct type
*arg_type
;
14585 /* DWARF version 2 has no clean way to discern C++
14586 static and non-static member functions. G++ helps
14587 GDB by marking the first parameter for non-static
14588 member functions (which is the this pointer) as
14589 artificial. We pass this information to
14590 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14592 DWARF version 3 added DW_AT_object_pointer, which GCC
14593 4.5 does not yet generate. */
14594 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14596 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14599 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14601 /* GCC/43521: In java, the formal parameter
14602 "this" is sometimes not marked with DW_AT_artificial. */
14603 if (cu
->language
== language_java
)
14605 const char *name
= dwarf2_name (child_die
, cu
);
14607 if (name
&& !strcmp (name
, "this"))
14608 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
14611 arg_type
= die_type (child_die
, cu
);
14613 /* RealView does not mark THIS as const, which the testsuite
14614 expects. GCC marks THIS as const in method definitions,
14615 but not in the class specifications (GCC PR 43053). */
14616 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14617 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14620 struct dwarf2_cu
*arg_cu
= cu
;
14621 const char *name
= dwarf2_name (child_die
, cu
);
14623 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14626 /* If the compiler emits this, use it. */
14627 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14630 else if (name
&& strcmp (name
, "this") == 0)
14631 /* Function definitions will have the argument names. */
14633 else if (name
== NULL
&& iparams
== 0)
14634 /* Declarations may not have the names, so like
14635 elsewhere in GDB, assume an artificial first
14636 argument is "this". */
14640 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14644 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14647 child_die
= sibling_die (child_die
);
14654 static struct type
*
14655 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14657 struct objfile
*objfile
= cu
->objfile
;
14658 const char *name
= NULL
;
14659 struct type
*this_type
, *target_type
;
14661 name
= dwarf2_full_name (NULL
, die
, cu
);
14662 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
14663 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
14664 TYPE_NAME (this_type
) = name
;
14665 set_die_type (die
, this_type
, cu
);
14666 target_type
= die_type (die
, cu
);
14667 if (target_type
!= this_type
)
14668 TYPE_TARGET_TYPE (this_type
) = target_type
;
14671 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14672 spec and cause infinite loops in GDB. */
14673 complaint (&symfile_complaints
,
14674 _("Self-referential DW_TAG_typedef "
14675 "- DIE at 0x%x [in module %s]"),
14676 die
->offset
.sect_off
, objfile_name (objfile
));
14677 TYPE_TARGET_TYPE (this_type
) = NULL
;
14682 /* Find a representation of a given base type and install
14683 it in the TYPE field of the die. */
14685 static struct type
*
14686 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14688 struct objfile
*objfile
= cu
->objfile
;
14690 struct attribute
*attr
;
14691 int encoding
= 0, size
= 0;
14693 enum type_code code
= TYPE_CODE_INT
;
14694 int type_flags
= 0;
14695 struct type
*target_type
= NULL
;
14697 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14700 encoding
= DW_UNSND (attr
);
14702 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14705 size
= DW_UNSND (attr
);
14707 name
= dwarf2_name (die
, cu
);
14710 complaint (&symfile_complaints
,
14711 _("DW_AT_name missing from DW_TAG_base_type"));
14716 case DW_ATE_address
:
14717 /* Turn DW_ATE_address into a void * pointer. */
14718 code
= TYPE_CODE_PTR
;
14719 type_flags
|= TYPE_FLAG_UNSIGNED
;
14720 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
14722 case DW_ATE_boolean
:
14723 code
= TYPE_CODE_BOOL
;
14724 type_flags
|= TYPE_FLAG_UNSIGNED
;
14726 case DW_ATE_complex_float
:
14727 code
= TYPE_CODE_COMPLEX
;
14728 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
14730 case DW_ATE_decimal_float
:
14731 code
= TYPE_CODE_DECFLOAT
;
14734 code
= TYPE_CODE_FLT
;
14736 case DW_ATE_signed
:
14738 case DW_ATE_unsigned
:
14739 type_flags
|= TYPE_FLAG_UNSIGNED
;
14740 if (cu
->language
== language_fortran
14742 && startswith (name
, "character("))
14743 code
= TYPE_CODE_CHAR
;
14745 case DW_ATE_signed_char
:
14746 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14747 || cu
->language
== language_pascal
14748 || cu
->language
== language_fortran
)
14749 code
= TYPE_CODE_CHAR
;
14751 case DW_ATE_unsigned_char
:
14752 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14753 || cu
->language
== language_pascal
14754 || cu
->language
== language_fortran
)
14755 code
= TYPE_CODE_CHAR
;
14756 type_flags
|= TYPE_FLAG_UNSIGNED
;
14759 /* We just treat this as an integer and then recognize the
14760 type by name elsewhere. */
14764 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14765 dwarf_type_encoding_name (encoding
));
14769 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
14770 TYPE_NAME (type
) = name
;
14771 TYPE_TARGET_TYPE (type
) = target_type
;
14773 if (name
&& strcmp (name
, "char") == 0)
14774 TYPE_NOSIGN (type
) = 1;
14776 return set_die_type (die
, type
, cu
);
14779 /* Parse dwarf attribute if it's a block, reference or constant and put the
14780 resulting value of the attribute into struct bound_prop.
14781 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14784 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14785 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14787 struct dwarf2_property_baton
*baton
;
14788 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14790 if (attr
== NULL
|| prop
== NULL
)
14793 if (attr_form_is_block (attr
))
14795 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14796 baton
->referenced_type
= NULL
;
14797 baton
->locexpr
.per_cu
= cu
->per_cu
;
14798 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14799 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14800 prop
->data
.baton
= baton
;
14801 prop
->kind
= PROP_LOCEXPR
;
14802 gdb_assert (prop
->data
.baton
!= NULL
);
14804 else if (attr_form_is_ref (attr
))
14806 struct dwarf2_cu
*target_cu
= cu
;
14807 struct die_info
*target_die
;
14808 struct attribute
*target_attr
;
14810 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14811 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14812 if (target_attr
== NULL
)
14813 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
14815 if (target_attr
== NULL
)
14818 switch (target_attr
->name
)
14820 case DW_AT_location
:
14821 if (attr_form_is_section_offset (target_attr
))
14823 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14824 baton
->referenced_type
= die_type (target_die
, target_cu
);
14825 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14826 prop
->data
.baton
= baton
;
14827 prop
->kind
= PROP_LOCLIST
;
14828 gdb_assert (prop
->data
.baton
!= NULL
);
14830 else if (attr_form_is_block (target_attr
))
14832 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14833 baton
->referenced_type
= die_type (target_die
, target_cu
);
14834 baton
->locexpr
.per_cu
= cu
->per_cu
;
14835 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14836 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14837 prop
->data
.baton
= baton
;
14838 prop
->kind
= PROP_LOCEXPR
;
14839 gdb_assert (prop
->data
.baton
!= NULL
);
14843 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14844 "dynamic property");
14848 case DW_AT_data_member_location
:
14852 if (!handle_data_member_location (target_die
, target_cu
,
14856 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14857 baton
->referenced_type
= read_type_die (target_die
->parent
,
14859 baton
->offset_info
.offset
= offset
;
14860 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
14861 prop
->data
.baton
= baton
;
14862 prop
->kind
= PROP_ADDR_OFFSET
;
14867 else if (attr_form_is_constant (attr
))
14869 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14870 prop
->kind
= PROP_CONST
;
14874 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14875 dwarf2_name (die
, cu
));
14882 /* Read the given DW_AT_subrange DIE. */
14884 static struct type
*
14885 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14887 struct type
*base_type
, *orig_base_type
;
14888 struct type
*range_type
;
14889 struct attribute
*attr
;
14890 struct dynamic_prop low
, high
;
14891 int low_default_is_valid
;
14892 int high_bound_is_count
= 0;
14894 LONGEST negative_mask
;
14896 orig_base_type
= die_type (die
, cu
);
14897 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14898 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14899 creating the range type, but we use the result of check_typedef
14900 when examining properties of the type. */
14901 base_type
= check_typedef (orig_base_type
);
14903 /* The die_type call above may have already set the type for this DIE. */
14904 range_type
= get_die_type (die
, cu
);
14908 low
.kind
= PROP_CONST
;
14909 high
.kind
= PROP_CONST
;
14910 high
.data
.const_val
= 0;
14912 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14913 omitting DW_AT_lower_bound. */
14914 switch (cu
->language
)
14917 case language_cplus
:
14918 low
.data
.const_val
= 0;
14919 low_default_is_valid
= 1;
14921 case language_fortran
:
14922 low
.data
.const_val
= 1;
14923 low_default_is_valid
= 1;
14926 case language_java
:
14927 case language_objc
:
14928 low
.data
.const_val
= 0;
14929 low_default_is_valid
= (cu
->header
.version
>= 4);
14933 case language_pascal
:
14934 low
.data
.const_val
= 1;
14935 low_default_is_valid
= (cu
->header
.version
>= 4);
14938 low
.data
.const_val
= 0;
14939 low_default_is_valid
= 0;
14943 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
14945 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
14946 else if (!low_default_is_valid
)
14947 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
14948 "- DIE at 0x%x [in module %s]"),
14949 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
14951 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
14952 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14954 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
14955 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14957 /* If bounds are constant do the final calculation here. */
14958 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
14959 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
14961 high_bound_is_count
= 1;
14965 /* Dwarf-2 specifications explicitly allows to create subrange types
14966 without specifying a base type.
14967 In that case, the base type must be set to the type of
14968 the lower bound, upper bound or count, in that order, if any of these
14969 three attributes references an object that has a type.
14970 If no base type is found, the Dwarf-2 specifications say that
14971 a signed integer type of size equal to the size of an address should
14973 For the following C code: `extern char gdb_int [];'
14974 GCC produces an empty range DIE.
14975 FIXME: muller/2010-05-28: Possible references to object for low bound,
14976 high bound or count are not yet handled by this code. */
14977 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
14979 struct objfile
*objfile
= cu
->objfile
;
14980 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14981 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
14982 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
14984 /* Test "int", "long int", and "long long int" objfile types,
14985 and select the first one having a size above or equal to the
14986 architecture address size. */
14987 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14988 base_type
= int_type
;
14991 int_type
= objfile_type (objfile
)->builtin_long
;
14992 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14993 base_type
= int_type
;
14996 int_type
= objfile_type (objfile
)->builtin_long_long
;
14997 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14998 base_type
= int_type
;
15003 /* Normally, the DWARF producers are expected to use a signed
15004 constant form (Eg. DW_FORM_sdata) to express negative bounds.
15005 But this is unfortunately not always the case, as witnessed
15006 with GCC, for instance, where the ambiguous DW_FORM_dataN form
15007 is used instead. To work around that ambiguity, we treat
15008 the bounds as signed, and thus sign-extend their values, when
15009 the base type is signed. */
15011 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
15012 if (low
.kind
== PROP_CONST
15013 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
15014 low
.data
.const_val
|= negative_mask
;
15015 if (high
.kind
== PROP_CONST
15016 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
15017 high
.data
.const_val
|= negative_mask
;
15019 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
15021 if (high_bound_is_count
)
15022 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
15024 /* Ada expects an empty array on no boundary attributes. */
15025 if (attr
== NULL
&& cu
->language
!= language_ada
)
15026 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
15028 name
= dwarf2_name (die
, cu
);
15030 TYPE_NAME (range_type
) = name
;
15032 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15034 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
15036 set_die_type (die
, range_type
, cu
);
15038 /* set_die_type should be already done. */
15039 set_descriptive_type (range_type
, die
, cu
);
15044 static struct type
*
15045 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15049 /* For now, we only support the C meaning of an unspecified type: void. */
15051 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
15052 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
15054 return set_die_type (die
, type
, cu
);
15057 /* Read a single die and all its descendents. Set the die's sibling
15058 field to NULL; set other fields in the die correctly, and set all
15059 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15060 location of the info_ptr after reading all of those dies. PARENT
15061 is the parent of the die in question. */
15063 static struct die_info
*
15064 read_die_and_children (const struct die_reader_specs
*reader
,
15065 const gdb_byte
*info_ptr
,
15066 const gdb_byte
**new_info_ptr
,
15067 struct die_info
*parent
)
15069 struct die_info
*die
;
15070 const gdb_byte
*cur_ptr
;
15073 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15076 *new_info_ptr
= cur_ptr
;
15079 store_in_ref_table (die
, reader
->cu
);
15082 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15086 *new_info_ptr
= cur_ptr
;
15089 die
->sibling
= NULL
;
15090 die
->parent
= parent
;
15094 /* Read a die, all of its descendents, and all of its siblings; set
15095 all of the fields of all of the dies correctly. Arguments are as
15096 in read_die_and_children. */
15098 static struct die_info
*
15099 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15100 const gdb_byte
*info_ptr
,
15101 const gdb_byte
**new_info_ptr
,
15102 struct die_info
*parent
)
15104 struct die_info
*first_die
, *last_sibling
;
15105 const gdb_byte
*cur_ptr
;
15107 cur_ptr
= info_ptr
;
15108 first_die
= last_sibling
= NULL
;
15112 struct die_info
*die
15113 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15117 *new_info_ptr
= cur_ptr
;
15124 last_sibling
->sibling
= die
;
15126 last_sibling
= die
;
15130 /* Read a die, all of its descendents, and all of its siblings; set
15131 all of the fields of all of the dies correctly. Arguments are as
15132 in read_die_and_children.
15133 This the main entry point for reading a DIE and all its children. */
15135 static struct die_info
*
15136 read_die_and_siblings (const struct die_reader_specs
*reader
,
15137 const gdb_byte
*info_ptr
,
15138 const gdb_byte
**new_info_ptr
,
15139 struct die_info
*parent
)
15141 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15142 new_info_ptr
, parent
);
15144 if (dwarf2_die_debug
)
15146 fprintf_unfiltered (gdb_stdlog
,
15147 "Read die from %s@0x%x of %s:\n",
15148 get_section_name (reader
->die_section
),
15149 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15150 bfd_get_filename (reader
->abfd
));
15151 dump_die (die
, dwarf2_die_debug
);
15157 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15159 The caller is responsible for filling in the extra attributes
15160 and updating (*DIEP)->num_attrs.
15161 Set DIEP to point to a newly allocated die with its information,
15162 except for its child, sibling, and parent fields.
15163 Set HAS_CHILDREN to tell whether the die has children or not. */
15165 static const gdb_byte
*
15166 read_full_die_1 (const struct die_reader_specs
*reader
,
15167 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15168 int *has_children
, int num_extra_attrs
)
15170 unsigned int abbrev_number
, bytes_read
, i
;
15171 sect_offset offset
;
15172 struct abbrev_info
*abbrev
;
15173 struct die_info
*die
;
15174 struct dwarf2_cu
*cu
= reader
->cu
;
15175 bfd
*abfd
= reader
->abfd
;
15177 offset
.sect_off
= info_ptr
- reader
->buffer
;
15178 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15179 info_ptr
+= bytes_read
;
15180 if (!abbrev_number
)
15187 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15189 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15191 bfd_get_filename (abfd
));
15193 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15194 die
->offset
= offset
;
15195 die
->tag
= abbrev
->tag
;
15196 die
->abbrev
= abbrev_number
;
15198 /* Make the result usable.
15199 The caller needs to update num_attrs after adding the extra
15201 die
->num_attrs
= abbrev
->num_attrs
;
15203 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15204 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15208 *has_children
= abbrev
->has_children
;
15212 /* Read a die and all its attributes.
15213 Set DIEP to point to a newly allocated die with its information,
15214 except for its child, sibling, and parent fields.
15215 Set HAS_CHILDREN to tell whether the die has children or not. */
15217 static const gdb_byte
*
15218 read_full_die (const struct die_reader_specs
*reader
,
15219 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15222 const gdb_byte
*result
;
15224 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15226 if (dwarf2_die_debug
)
15228 fprintf_unfiltered (gdb_stdlog
,
15229 "Read die from %s@0x%x of %s:\n",
15230 get_section_name (reader
->die_section
),
15231 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15232 bfd_get_filename (reader
->abfd
));
15233 dump_die (*diep
, dwarf2_die_debug
);
15239 /* Abbreviation tables.
15241 In DWARF version 2, the description of the debugging information is
15242 stored in a separate .debug_abbrev section. Before we read any
15243 dies from a section we read in all abbreviations and install them
15244 in a hash table. */
15246 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15248 static struct abbrev_info
*
15249 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15251 struct abbrev_info
*abbrev
;
15253 abbrev
= (struct abbrev_info
*)
15254 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
15255 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15259 /* Add an abbreviation to the table. */
15262 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15263 unsigned int abbrev_number
,
15264 struct abbrev_info
*abbrev
)
15266 unsigned int hash_number
;
15268 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15269 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15270 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15273 /* Look up an abbrev in the table.
15274 Returns NULL if the abbrev is not found. */
15276 static struct abbrev_info
*
15277 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15278 unsigned int abbrev_number
)
15280 unsigned int hash_number
;
15281 struct abbrev_info
*abbrev
;
15283 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15284 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15288 if (abbrev
->number
== abbrev_number
)
15290 abbrev
= abbrev
->next
;
15295 /* Read in an abbrev table. */
15297 static struct abbrev_table
*
15298 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15299 sect_offset offset
)
15301 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15302 bfd
*abfd
= get_section_bfd_owner (section
);
15303 struct abbrev_table
*abbrev_table
;
15304 const gdb_byte
*abbrev_ptr
;
15305 struct abbrev_info
*cur_abbrev
;
15306 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15307 unsigned int abbrev_form
;
15308 struct attr_abbrev
*cur_attrs
;
15309 unsigned int allocated_attrs
;
15311 abbrev_table
= XNEW (struct abbrev_table
);
15312 abbrev_table
->offset
= offset
;
15313 obstack_init (&abbrev_table
->abbrev_obstack
);
15314 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
15316 * sizeof (struct abbrev_info
*)));
15317 memset (abbrev_table
->abbrevs
, 0,
15318 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15320 dwarf2_read_section (objfile
, section
);
15321 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
15322 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15323 abbrev_ptr
+= bytes_read
;
15325 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15326 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
15328 /* Loop until we reach an abbrev number of 0. */
15329 while (abbrev_number
)
15331 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15333 /* read in abbrev header */
15334 cur_abbrev
->number
= abbrev_number
;
15335 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15336 abbrev_ptr
+= bytes_read
;
15337 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15340 /* now read in declarations */
15341 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15342 abbrev_ptr
+= bytes_read
;
15343 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15344 abbrev_ptr
+= bytes_read
;
15345 while (abbrev_name
)
15347 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15349 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15351 = xrealloc (cur_attrs
, (allocated_attrs
15352 * sizeof (struct attr_abbrev
)));
15355 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
15356 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
15357 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15358 abbrev_ptr
+= bytes_read
;
15359 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15360 abbrev_ptr
+= bytes_read
;
15363 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
15364 (cur_abbrev
->num_attrs
15365 * sizeof (struct attr_abbrev
)));
15366 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15367 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15369 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15371 /* Get next abbreviation.
15372 Under Irix6 the abbreviations for a compilation unit are not
15373 always properly terminated with an abbrev number of 0.
15374 Exit loop if we encounter an abbreviation which we have
15375 already read (which means we are about to read the abbreviations
15376 for the next compile unit) or if the end of the abbreviation
15377 table is reached. */
15378 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15380 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15381 abbrev_ptr
+= bytes_read
;
15382 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15387 return abbrev_table
;
15390 /* Free the resources held by ABBREV_TABLE. */
15393 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15395 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15396 xfree (abbrev_table
);
15399 /* Same as abbrev_table_free but as a cleanup.
15400 We pass in a pointer to the pointer to the table so that we can
15401 set the pointer to NULL when we're done. It also simplifies
15402 build_type_psymtabs_1. */
15405 abbrev_table_free_cleanup (void *table_ptr
)
15407 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
15409 if (*abbrev_table_ptr
!= NULL
)
15410 abbrev_table_free (*abbrev_table_ptr
);
15411 *abbrev_table_ptr
= NULL
;
15414 /* Read the abbrev table for CU from ABBREV_SECTION. */
15417 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15418 struct dwarf2_section_info
*abbrev_section
)
15421 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15424 /* Release the memory used by the abbrev table for a compilation unit. */
15427 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15429 struct dwarf2_cu
*cu
= ptr_to_cu
;
15431 if (cu
->abbrev_table
!= NULL
)
15432 abbrev_table_free (cu
->abbrev_table
);
15433 /* Set this to NULL so that we SEGV if we try to read it later,
15434 and also because free_comp_unit verifies this is NULL. */
15435 cu
->abbrev_table
= NULL
;
15438 /* Returns nonzero if TAG represents a type that we might generate a partial
15442 is_type_tag_for_partial (int tag
)
15447 /* Some types that would be reasonable to generate partial symbols for,
15448 that we don't at present. */
15449 case DW_TAG_array_type
:
15450 case DW_TAG_file_type
:
15451 case DW_TAG_ptr_to_member_type
:
15452 case DW_TAG_set_type
:
15453 case DW_TAG_string_type
:
15454 case DW_TAG_subroutine_type
:
15456 case DW_TAG_base_type
:
15457 case DW_TAG_class_type
:
15458 case DW_TAG_interface_type
:
15459 case DW_TAG_enumeration_type
:
15460 case DW_TAG_structure_type
:
15461 case DW_TAG_subrange_type
:
15462 case DW_TAG_typedef
:
15463 case DW_TAG_union_type
:
15470 /* Load all DIEs that are interesting for partial symbols into memory. */
15472 static struct partial_die_info
*
15473 load_partial_dies (const struct die_reader_specs
*reader
,
15474 const gdb_byte
*info_ptr
, int building_psymtab
)
15476 struct dwarf2_cu
*cu
= reader
->cu
;
15477 struct objfile
*objfile
= cu
->objfile
;
15478 struct partial_die_info
*part_die
;
15479 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15480 struct abbrev_info
*abbrev
;
15481 unsigned int bytes_read
;
15482 unsigned int load_all
= 0;
15483 int nesting_level
= 1;
15488 gdb_assert (cu
->per_cu
!= NULL
);
15489 if (cu
->per_cu
->load_all_dies
)
15493 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15497 &cu
->comp_unit_obstack
,
15498 hashtab_obstack_allocate
,
15499 dummy_obstack_deallocate
);
15501 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15502 sizeof (struct partial_die_info
));
15506 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15508 /* A NULL abbrev means the end of a series of children. */
15509 if (abbrev
== NULL
)
15511 if (--nesting_level
== 0)
15513 /* PART_DIE was probably the last thing allocated on the
15514 comp_unit_obstack, so we could call obstack_free
15515 here. We don't do that because the waste is small,
15516 and will be cleaned up when we're done with this
15517 compilation unit. This way, we're also more robust
15518 against other users of the comp_unit_obstack. */
15521 info_ptr
+= bytes_read
;
15522 last_die
= parent_die
;
15523 parent_die
= parent_die
->die_parent
;
15527 /* Check for template arguments. We never save these; if
15528 they're seen, we just mark the parent, and go on our way. */
15529 if (parent_die
!= NULL
15530 && cu
->language
== language_cplus
15531 && (abbrev
->tag
== DW_TAG_template_type_param
15532 || abbrev
->tag
== DW_TAG_template_value_param
))
15534 parent_die
->has_template_arguments
= 1;
15538 /* We don't need a partial DIE for the template argument. */
15539 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15544 /* We only recurse into c++ subprograms looking for template arguments.
15545 Skip their other children. */
15547 && cu
->language
== language_cplus
15548 && parent_die
!= NULL
15549 && parent_die
->tag
== DW_TAG_subprogram
)
15551 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15555 /* Check whether this DIE is interesting enough to save. Normally
15556 we would not be interested in members here, but there may be
15557 later variables referencing them via DW_AT_specification (for
15558 static members). */
15560 && !is_type_tag_for_partial (abbrev
->tag
)
15561 && abbrev
->tag
!= DW_TAG_constant
15562 && abbrev
->tag
!= DW_TAG_enumerator
15563 && abbrev
->tag
!= DW_TAG_subprogram
15564 && abbrev
->tag
!= DW_TAG_lexical_block
15565 && abbrev
->tag
!= DW_TAG_variable
15566 && abbrev
->tag
!= DW_TAG_namespace
15567 && abbrev
->tag
!= DW_TAG_module
15568 && abbrev
->tag
!= DW_TAG_member
15569 && abbrev
->tag
!= DW_TAG_imported_unit
15570 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15572 /* Otherwise we skip to the next sibling, if any. */
15573 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15577 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15580 /* This two-pass algorithm for processing partial symbols has a
15581 high cost in cache pressure. Thus, handle some simple cases
15582 here which cover the majority of C partial symbols. DIEs
15583 which neither have specification tags in them, nor could have
15584 specification tags elsewhere pointing at them, can simply be
15585 processed and discarded.
15587 This segment is also optional; scan_partial_symbols and
15588 add_partial_symbol will handle these DIEs if we chain
15589 them in normally. When compilers which do not emit large
15590 quantities of duplicate debug information are more common,
15591 this code can probably be removed. */
15593 /* Any complete simple types at the top level (pretty much all
15594 of them, for a language without namespaces), can be processed
15596 if (parent_die
== NULL
15597 && part_die
->has_specification
== 0
15598 && part_die
->is_declaration
== 0
15599 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15600 || part_die
->tag
== DW_TAG_base_type
15601 || part_die
->tag
== DW_TAG_subrange_type
))
15603 if (building_psymtab
&& part_die
->name
!= NULL
)
15604 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15605 VAR_DOMAIN
, LOC_TYPEDEF
,
15606 &objfile
->static_psymbols
,
15607 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
15608 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15612 /* The exception for DW_TAG_typedef with has_children above is
15613 a workaround of GCC PR debug/47510. In the case of this complaint
15614 type_name_no_tag_or_error will error on such types later.
15616 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15617 it could not find the child DIEs referenced later, this is checked
15618 above. In correct DWARF DW_TAG_typedef should have no children. */
15620 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15621 complaint (&symfile_complaints
,
15622 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15623 "- DIE at 0x%x [in module %s]"),
15624 part_die
->offset
.sect_off
, objfile_name (objfile
));
15626 /* If we're at the second level, and we're an enumerator, and
15627 our parent has no specification (meaning possibly lives in a
15628 namespace elsewhere), then we can add the partial symbol now
15629 instead of queueing it. */
15630 if (part_die
->tag
== DW_TAG_enumerator
15631 && parent_die
!= NULL
15632 && parent_die
->die_parent
== NULL
15633 && parent_die
->tag
== DW_TAG_enumeration_type
15634 && parent_die
->has_specification
== 0)
15636 if (part_die
->name
== NULL
)
15637 complaint (&symfile_complaints
,
15638 _("malformed enumerator DIE ignored"));
15639 else if (building_psymtab
)
15640 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15641 VAR_DOMAIN
, LOC_CONST
,
15642 (cu
->language
== language_cplus
15643 || cu
->language
== language_java
)
15644 ? &objfile
->global_psymbols
15645 : &objfile
->static_psymbols
,
15646 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
15648 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15652 /* We'll save this DIE so link it in. */
15653 part_die
->die_parent
= parent_die
;
15654 part_die
->die_sibling
= NULL
;
15655 part_die
->die_child
= NULL
;
15657 if (last_die
&& last_die
== parent_die
)
15658 last_die
->die_child
= part_die
;
15660 last_die
->die_sibling
= part_die
;
15662 last_die
= part_die
;
15664 if (first_die
== NULL
)
15665 first_die
= part_die
;
15667 /* Maybe add the DIE to the hash table. Not all DIEs that we
15668 find interesting need to be in the hash table, because we
15669 also have the parent/sibling/child chains; only those that we
15670 might refer to by offset later during partial symbol reading.
15672 For now this means things that might have be the target of a
15673 DW_AT_specification, DW_AT_abstract_origin, or
15674 DW_AT_extension. DW_AT_extension will refer only to
15675 namespaces; DW_AT_abstract_origin refers to functions (and
15676 many things under the function DIE, but we do not recurse
15677 into function DIEs during partial symbol reading) and
15678 possibly variables as well; DW_AT_specification refers to
15679 declarations. Declarations ought to have the DW_AT_declaration
15680 flag. It happens that GCC forgets to put it in sometimes, but
15681 only for functions, not for types.
15683 Adding more things than necessary to the hash table is harmless
15684 except for the performance cost. Adding too few will result in
15685 wasted time in find_partial_die, when we reread the compilation
15686 unit with load_all_dies set. */
15689 || abbrev
->tag
== DW_TAG_constant
15690 || abbrev
->tag
== DW_TAG_subprogram
15691 || abbrev
->tag
== DW_TAG_variable
15692 || abbrev
->tag
== DW_TAG_namespace
15693 || part_die
->is_declaration
)
15697 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15698 part_die
->offset
.sect_off
, INSERT
);
15702 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15703 sizeof (struct partial_die_info
));
15705 /* For some DIEs we want to follow their children (if any). For C
15706 we have no reason to follow the children of structures; for other
15707 languages we have to, so that we can get at method physnames
15708 to infer fully qualified class names, for DW_AT_specification,
15709 and for C++ template arguments. For C++, we also look one level
15710 inside functions to find template arguments (if the name of the
15711 function does not already contain the template arguments).
15713 For Ada, we need to scan the children of subprograms and lexical
15714 blocks as well because Ada allows the definition of nested
15715 entities that could be interesting for the debugger, such as
15716 nested subprograms for instance. */
15717 if (last_die
->has_children
15719 || last_die
->tag
== DW_TAG_namespace
15720 || last_die
->tag
== DW_TAG_module
15721 || last_die
->tag
== DW_TAG_enumeration_type
15722 || (cu
->language
== language_cplus
15723 && last_die
->tag
== DW_TAG_subprogram
15724 && (last_die
->name
== NULL
15725 || strchr (last_die
->name
, '<') == NULL
))
15726 || (cu
->language
!= language_c
15727 && (last_die
->tag
== DW_TAG_class_type
15728 || last_die
->tag
== DW_TAG_interface_type
15729 || last_die
->tag
== DW_TAG_structure_type
15730 || last_die
->tag
== DW_TAG_union_type
))
15731 || (cu
->language
== language_ada
15732 && (last_die
->tag
== DW_TAG_subprogram
15733 || last_die
->tag
== DW_TAG_lexical_block
))))
15736 parent_die
= last_die
;
15740 /* Otherwise we skip to the next sibling, if any. */
15741 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15743 /* Back to the top, do it again. */
15747 /* Read a minimal amount of information into the minimal die structure. */
15749 static const gdb_byte
*
15750 read_partial_die (const struct die_reader_specs
*reader
,
15751 struct partial_die_info
*part_die
,
15752 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15753 const gdb_byte
*info_ptr
)
15755 struct dwarf2_cu
*cu
= reader
->cu
;
15756 struct objfile
*objfile
= cu
->objfile
;
15757 const gdb_byte
*buffer
= reader
->buffer
;
15759 struct attribute attr
;
15760 int has_low_pc_attr
= 0;
15761 int has_high_pc_attr
= 0;
15762 int high_pc_relative
= 0;
15764 memset (part_die
, 0, sizeof (struct partial_die_info
));
15766 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15768 info_ptr
+= abbrev_len
;
15770 if (abbrev
== NULL
)
15773 part_die
->tag
= abbrev
->tag
;
15774 part_die
->has_children
= abbrev
->has_children
;
15776 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15778 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15780 /* Store the data if it is of an attribute we want to keep in a
15781 partial symbol table. */
15785 switch (part_die
->tag
)
15787 case DW_TAG_compile_unit
:
15788 case DW_TAG_partial_unit
:
15789 case DW_TAG_type_unit
:
15790 /* Compilation units have a DW_AT_name that is a filename, not
15791 a source language identifier. */
15792 case DW_TAG_enumeration_type
:
15793 case DW_TAG_enumerator
:
15794 /* These tags always have simple identifiers already; no need
15795 to canonicalize them. */
15796 part_die
->name
= DW_STRING (&attr
);
15800 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15801 &objfile
->per_bfd
->storage_obstack
);
15805 case DW_AT_linkage_name
:
15806 case DW_AT_MIPS_linkage_name
:
15807 /* Note that both forms of linkage name might appear. We
15808 assume they will be the same, and we only store the last
15810 if (cu
->language
== language_ada
)
15811 part_die
->name
= DW_STRING (&attr
);
15812 part_die
->linkage_name
= DW_STRING (&attr
);
15815 has_low_pc_attr
= 1;
15816 part_die
->lowpc
= attr_value_as_address (&attr
);
15818 case DW_AT_high_pc
:
15819 has_high_pc_attr
= 1;
15820 part_die
->highpc
= attr_value_as_address (&attr
);
15821 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15822 high_pc_relative
= 1;
15824 case DW_AT_location
:
15825 /* Support the .debug_loc offsets. */
15826 if (attr_form_is_block (&attr
))
15828 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15830 else if (attr_form_is_section_offset (&attr
))
15832 dwarf2_complex_location_expr_complaint ();
15836 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15837 "partial symbol information");
15840 case DW_AT_external
:
15841 part_die
->is_external
= DW_UNSND (&attr
);
15843 case DW_AT_declaration
:
15844 part_die
->is_declaration
= DW_UNSND (&attr
);
15847 part_die
->has_type
= 1;
15849 case DW_AT_abstract_origin
:
15850 case DW_AT_specification
:
15851 case DW_AT_extension
:
15852 part_die
->has_specification
= 1;
15853 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15854 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15855 || cu
->per_cu
->is_dwz
);
15857 case DW_AT_sibling
:
15858 /* Ignore absolute siblings, they might point outside of
15859 the current compile unit. */
15860 if (attr
.form
== DW_FORM_ref_addr
)
15861 complaint (&symfile_complaints
,
15862 _("ignoring absolute DW_AT_sibling"));
15865 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15866 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15868 if (sibling_ptr
< info_ptr
)
15869 complaint (&symfile_complaints
,
15870 _("DW_AT_sibling points backwards"));
15871 else if (sibling_ptr
> reader
->buffer_end
)
15872 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15874 part_die
->sibling
= sibling_ptr
;
15877 case DW_AT_byte_size
:
15878 part_die
->has_byte_size
= 1;
15880 case DW_AT_const_value
:
15881 part_die
->has_const_value
= 1;
15883 case DW_AT_calling_convention
:
15884 /* DWARF doesn't provide a way to identify a program's source-level
15885 entry point. DW_AT_calling_convention attributes are only meant
15886 to describe functions' calling conventions.
15888 However, because it's a necessary piece of information in
15889 Fortran, and because DW_CC_program is the only piece of debugging
15890 information whose definition refers to a 'main program' at all,
15891 several compilers have begun marking Fortran main programs with
15892 DW_CC_program --- even when those functions use the standard
15893 calling conventions.
15895 So until DWARF specifies a way to provide this information and
15896 compilers pick up the new representation, we'll support this
15898 if (DW_UNSND (&attr
) == DW_CC_program
15899 && cu
->language
== language_fortran
)
15900 set_objfile_main_name (objfile
, part_die
->name
, language_fortran
);
15903 if (DW_UNSND (&attr
) == DW_INL_inlined
15904 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15905 part_die
->may_be_inlined
= 1;
15909 if (part_die
->tag
== DW_TAG_imported_unit
)
15911 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15912 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15913 || cu
->per_cu
->is_dwz
);
15922 if (high_pc_relative
)
15923 part_die
->highpc
+= part_die
->lowpc
;
15925 if (has_low_pc_attr
&& has_high_pc_attr
)
15927 /* When using the GNU linker, .gnu.linkonce. sections are used to
15928 eliminate duplicate copies of functions and vtables and such.
15929 The linker will arbitrarily choose one and discard the others.
15930 The AT_*_pc values for such functions refer to local labels in
15931 these sections. If the section from that file was discarded, the
15932 labels are not in the output, so the relocs get a value of 0.
15933 If this is a discarded function, mark the pc bounds as invalid,
15934 so that GDB will ignore it. */
15935 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15937 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15939 complaint (&symfile_complaints
,
15940 _("DW_AT_low_pc %s is zero "
15941 "for DIE at 0x%x [in module %s]"),
15942 paddress (gdbarch
, part_die
->lowpc
),
15943 part_die
->offset
.sect_off
, objfile_name (objfile
));
15945 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
15946 else if (part_die
->lowpc
>= part_die
->highpc
)
15948 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15950 complaint (&symfile_complaints
,
15951 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
15952 "for DIE at 0x%x [in module %s]"),
15953 paddress (gdbarch
, part_die
->lowpc
),
15954 paddress (gdbarch
, part_die
->highpc
),
15955 part_die
->offset
.sect_off
, objfile_name (objfile
));
15958 part_die
->has_pc_info
= 1;
15964 /* Find a cached partial DIE at OFFSET in CU. */
15966 static struct partial_die_info
*
15967 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
15969 struct partial_die_info
*lookup_die
= NULL
;
15970 struct partial_die_info part_die
;
15972 part_die
.offset
= offset
;
15973 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
15979 /* Find a partial DIE at OFFSET, which may or may not be in CU,
15980 except in the case of .debug_types DIEs which do not reference
15981 outside their CU (they do however referencing other types via
15982 DW_FORM_ref_sig8). */
15984 static struct partial_die_info
*
15985 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
15987 struct objfile
*objfile
= cu
->objfile
;
15988 struct dwarf2_per_cu_data
*per_cu
= NULL
;
15989 struct partial_die_info
*pd
= NULL
;
15991 if (offset_in_dwz
== cu
->per_cu
->is_dwz
15992 && offset_in_cu_p (&cu
->header
, offset
))
15994 pd
= find_partial_die_in_comp_unit (offset
, cu
);
15997 /* We missed recording what we needed.
15998 Load all dies and try again. */
15999 per_cu
= cu
->per_cu
;
16003 /* TUs don't reference other CUs/TUs (except via type signatures). */
16004 if (cu
->per_cu
->is_debug_types
)
16006 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
16007 " external reference to offset 0x%lx [in module %s].\n"),
16008 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
16009 bfd_get_filename (objfile
->obfd
));
16011 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
16014 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
16015 load_partial_comp_unit (per_cu
);
16017 per_cu
->cu
->last_used
= 0;
16018 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16021 /* If we didn't find it, and not all dies have been loaded,
16022 load them all and try again. */
16024 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
16026 per_cu
->load_all_dies
= 1;
16028 /* This is nasty. When we reread the DIEs, somewhere up the call chain
16029 THIS_CU->cu may already be in use. So we can't just free it and
16030 replace its DIEs with the ones we read in. Instead, we leave those
16031 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
16032 and clobber THIS_CU->cu->partial_dies with the hash table for the new
16034 load_partial_comp_unit (per_cu
);
16036 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16040 internal_error (__FILE__
, __LINE__
,
16041 _("could not find partial DIE 0x%x "
16042 "in cache [from module %s]\n"),
16043 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
16047 /* See if we can figure out if the class lives in a namespace. We do
16048 this by looking for a member function; its demangled name will
16049 contain namespace info, if there is any. */
16052 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
16053 struct dwarf2_cu
*cu
)
16055 /* NOTE: carlton/2003-10-07: Getting the info this way changes
16056 what template types look like, because the demangler
16057 frequently doesn't give the same name as the debug info. We
16058 could fix this by only using the demangled name to get the
16059 prefix (but see comment in read_structure_type). */
16061 struct partial_die_info
*real_pdi
;
16062 struct partial_die_info
*child_pdi
;
16064 /* If this DIE (this DIE's specification, if any) has a parent, then
16065 we should not do this. We'll prepend the parent's fully qualified
16066 name when we create the partial symbol. */
16068 real_pdi
= struct_pdi
;
16069 while (real_pdi
->has_specification
)
16070 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16071 real_pdi
->spec_is_dwz
, cu
);
16073 if (real_pdi
->die_parent
!= NULL
)
16076 for (child_pdi
= struct_pdi
->die_child
;
16078 child_pdi
= child_pdi
->die_sibling
)
16080 if (child_pdi
->tag
== DW_TAG_subprogram
16081 && child_pdi
->linkage_name
!= NULL
)
16083 char *actual_class_name
16084 = language_class_name_from_physname (cu
->language_defn
,
16085 child_pdi
->linkage_name
);
16086 if (actual_class_name
!= NULL
)
16089 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16091 strlen (actual_class_name
));
16092 xfree (actual_class_name
);
16099 /* Adjust PART_DIE before generating a symbol for it. This function
16100 may set the is_external flag or change the DIE's name. */
16103 fixup_partial_die (struct partial_die_info
*part_die
,
16104 struct dwarf2_cu
*cu
)
16106 /* Once we've fixed up a die, there's no point in doing so again.
16107 This also avoids a memory leak if we were to call
16108 guess_partial_die_structure_name multiple times. */
16109 if (part_die
->fixup_called
)
16112 /* If we found a reference attribute and the DIE has no name, try
16113 to find a name in the referred to DIE. */
16115 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16117 struct partial_die_info
*spec_die
;
16119 spec_die
= find_partial_die (part_die
->spec_offset
,
16120 part_die
->spec_is_dwz
, cu
);
16122 fixup_partial_die (spec_die
, cu
);
16124 if (spec_die
->name
)
16126 part_die
->name
= spec_die
->name
;
16128 /* Copy DW_AT_external attribute if it is set. */
16129 if (spec_die
->is_external
)
16130 part_die
->is_external
= spec_die
->is_external
;
16134 /* Set default names for some unnamed DIEs. */
16136 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16137 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16139 /* If there is no parent die to provide a namespace, and there are
16140 children, see if we can determine the namespace from their linkage
16142 if (cu
->language
== language_cplus
16143 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16144 && part_die
->die_parent
== NULL
16145 && part_die
->has_children
16146 && (part_die
->tag
== DW_TAG_class_type
16147 || part_die
->tag
== DW_TAG_structure_type
16148 || part_die
->tag
== DW_TAG_union_type
))
16149 guess_partial_die_structure_name (part_die
, cu
);
16151 /* GCC might emit a nameless struct or union that has a linkage
16152 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16153 if (part_die
->name
== NULL
16154 && (part_die
->tag
== DW_TAG_class_type
16155 || part_die
->tag
== DW_TAG_interface_type
16156 || part_die
->tag
== DW_TAG_structure_type
16157 || part_die
->tag
== DW_TAG_union_type
)
16158 && part_die
->linkage_name
!= NULL
)
16162 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16167 /* Strip any leading namespaces/classes, keep only the base name.
16168 DW_AT_name for named DIEs does not contain the prefixes. */
16169 base
= strrchr (demangled
, ':');
16170 if (base
&& base
> demangled
&& base
[-1] == ':')
16176 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16177 base
, strlen (base
));
16182 part_die
->fixup_called
= 1;
16185 /* Read an attribute value described by an attribute form. */
16187 static const gdb_byte
*
16188 read_attribute_value (const struct die_reader_specs
*reader
,
16189 struct attribute
*attr
, unsigned form
,
16190 const gdb_byte
*info_ptr
)
16192 struct dwarf2_cu
*cu
= reader
->cu
;
16193 struct objfile
*objfile
= cu
->objfile
;
16194 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16195 bfd
*abfd
= reader
->abfd
;
16196 struct comp_unit_head
*cu_header
= &cu
->header
;
16197 unsigned int bytes_read
;
16198 struct dwarf_block
*blk
;
16203 case DW_FORM_ref_addr
:
16204 if (cu
->header
.version
== 2)
16205 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16207 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16208 &cu
->header
, &bytes_read
);
16209 info_ptr
+= bytes_read
;
16211 case DW_FORM_GNU_ref_alt
:
16212 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16213 info_ptr
+= bytes_read
;
16216 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16217 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16218 info_ptr
+= bytes_read
;
16220 case DW_FORM_block2
:
16221 blk
= dwarf_alloc_block (cu
);
16222 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16224 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16225 info_ptr
+= blk
->size
;
16226 DW_BLOCK (attr
) = blk
;
16228 case DW_FORM_block4
:
16229 blk
= dwarf_alloc_block (cu
);
16230 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16232 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16233 info_ptr
+= blk
->size
;
16234 DW_BLOCK (attr
) = blk
;
16236 case DW_FORM_data2
:
16237 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16240 case DW_FORM_data4
:
16241 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16244 case DW_FORM_data8
:
16245 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16248 case DW_FORM_sec_offset
:
16249 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16250 info_ptr
+= bytes_read
;
16252 case DW_FORM_string
:
16253 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16254 DW_STRING_IS_CANONICAL (attr
) = 0;
16255 info_ptr
+= bytes_read
;
16258 if (!cu
->per_cu
->is_dwz
)
16260 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16262 DW_STRING_IS_CANONICAL (attr
) = 0;
16263 info_ptr
+= bytes_read
;
16267 case DW_FORM_GNU_strp_alt
:
16269 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16270 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16273 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16274 DW_STRING_IS_CANONICAL (attr
) = 0;
16275 info_ptr
+= bytes_read
;
16278 case DW_FORM_exprloc
:
16279 case DW_FORM_block
:
16280 blk
= dwarf_alloc_block (cu
);
16281 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16282 info_ptr
+= bytes_read
;
16283 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16284 info_ptr
+= blk
->size
;
16285 DW_BLOCK (attr
) = blk
;
16287 case DW_FORM_block1
:
16288 blk
= dwarf_alloc_block (cu
);
16289 blk
->size
= read_1_byte (abfd
, info_ptr
);
16291 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16292 info_ptr
+= blk
->size
;
16293 DW_BLOCK (attr
) = blk
;
16295 case DW_FORM_data1
:
16296 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16300 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16303 case DW_FORM_flag_present
:
16304 DW_UNSND (attr
) = 1;
16306 case DW_FORM_sdata
:
16307 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16308 info_ptr
+= bytes_read
;
16310 case DW_FORM_udata
:
16311 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16312 info_ptr
+= bytes_read
;
16315 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16316 + read_1_byte (abfd
, info_ptr
));
16320 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16321 + read_2_bytes (abfd
, info_ptr
));
16325 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16326 + read_4_bytes (abfd
, info_ptr
));
16330 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16331 + read_8_bytes (abfd
, info_ptr
));
16334 case DW_FORM_ref_sig8
:
16335 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16338 case DW_FORM_ref_udata
:
16339 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16340 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16341 info_ptr
+= bytes_read
;
16343 case DW_FORM_indirect
:
16344 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16345 info_ptr
+= bytes_read
;
16346 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
16348 case DW_FORM_GNU_addr_index
:
16349 if (reader
->dwo_file
== NULL
)
16351 /* For now flag a hard error.
16352 Later we can turn this into a complaint. */
16353 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16354 dwarf_form_name (form
),
16355 bfd_get_filename (abfd
));
16357 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16358 info_ptr
+= bytes_read
;
16360 case DW_FORM_GNU_str_index
:
16361 if (reader
->dwo_file
== NULL
)
16363 /* For now flag a hard error.
16364 Later we can turn this into a complaint if warranted. */
16365 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16366 dwarf_form_name (form
),
16367 bfd_get_filename (abfd
));
16370 ULONGEST str_index
=
16371 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16373 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16374 DW_STRING_IS_CANONICAL (attr
) = 0;
16375 info_ptr
+= bytes_read
;
16379 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16380 dwarf_form_name (form
),
16381 bfd_get_filename (abfd
));
16385 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16386 attr
->form
= DW_FORM_GNU_ref_alt
;
16388 /* We have seen instances where the compiler tried to emit a byte
16389 size attribute of -1 which ended up being encoded as an unsigned
16390 0xffffffff. Although 0xffffffff is technically a valid size value,
16391 an object of this size seems pretty unlikely so we can relatively
16392 safely treat these cases as if the size attribute was invalid and
16393 treat them as zero by default. */
16394 if (attr
->name
== DW_AT_byte_size
16395 && form
== DW_FORM_data4
16396 && DW_UNSND (attr
) >= 0xffffffff)
16399 (&symfile_complaints
,
16400 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16401 hex_string (DW_UNSND (attr
)));
16402 DW_UNSND (attr
) = 0;
16408 /* Read an attribute described by an abbreviated attribute. */
16410 static const gdb_byte
*
16411 read_attribute (const struct die_reader_specs
*reader
,
16412 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16413 const gdb_byte
*info_ptr
)
16415 attr
->name
= abbrev
->name
;
16416 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
16419 /* Read dwarf information from a buffer. */
16421 static unsigned int
16422 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16424 return bfd_get_8 (abfd
, buf
);
16428 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16430 return bfd_get_signed_8 (abfd
, buf
);
16433 static unsigned int
16434 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16436 return bfd_get_16 (abfd
, buf
);
16440 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16442 return bfd_get_signed_16 (abfd
, buf
);
16445 static unsigned int
16446 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16448 return bfd_get_32 (abfd
, buf
);
16452 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16454 return bfd_get_signed_32 (abfd
, buf
);
16458 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16460 return bfd_get_64 (abfd
, buf
);
16464 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16465 unsigned int *bytes_read
)
16467 struct comp_unit_head
*cu_header
= &cu
->header
;
16468 CORE_ADDR retval
= 0;
16470 if (cu_header
->signed_addr_p
)
16472 switch (cu_header
->addr_size
)
16475 retval
= bfd_get_signed_16 (abfd
, buf
);
16478 retval
= bfd_get_signed_32 (abfd
, buf
);
16481 retval
= bfd_get_signed_64 (abfd
, buf
);
16484 internal_error (__FILE__
, __LINE__
,
16485 _("read_address: bad switch, signed [in module %s]"),
16486 bfd_get_filename (abfd
));
16491 switch (cu_header
->addr_size
)
16494 retval
= bfd_get_16 (abfd
, buf
);
16497 retval
= bfd_get_32 (abfd
, buf
);
16500 retval
= bfd_get_64 (abfd
, buf
);
16503 internal_error (__FILE__
, __LINE__
,
16504 _("read_address: bad switch, "
16505 "unsigned [in module %s]"),
16506 bfd_get_filename (abfd
));
16510 *bytes_read
= cu_header
->addr_size
;
16514 /* Read the initial length from a section. The (draft) DWARF 3
16515 specification allows the initial length to take up either 4 bytes
16516 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16517 bytes describe the length and all offsets will be 8 bytes in length
16520 An older, non-standard 64-bit format is also handled by this
16521 function. The older format in question stores the initial length
16522 as an 8-byte quantity without an escape value. Lengths greater
16523 than 2^32 aren't very common which means that the initial 4 bytes
16524 is almost always zero. Since a length value of zero doesn't make
16525 sense for the 32-bit format, this initial zero can be considered to
16526 be an escape value which indicates the presence of the older 64-bit
16527 format. As written, the code can't detect (old format) lengths
16528 greater than 4GB. If it becomes necessary to handle lengths
16529 somewhat larger than 4GB, we could allow other small values (such
16530 as the non-sensical values of 1, 2, and 3) to also be used as
16531 escape values indicating the presence of the old format.
16533 The value returned via bytes_read should be used to increment the
16534 relevant pointer after calling read_initial_length().
16536 [ Note: read_initial_length() and read_offset() are based on the
16537 document entitled "DWARF Debugging Information Format", revision
16538 3, draft 8, dated November 19, 2001. This document was obtained
16541 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16543 This document is only a draft and is subject to change. (So beware.)
16545 Details regarding the older, non-standard 64-bit format were
16546 determined empirically by examining 64-bit ELF files produced by
16547 the SGI toolchain on an IRIX 6.5 machine.
16549 - Kevin, July 16, 2002
16553 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16555 LONGEST length
= bfd_get_32 (abfd
, buf
);
16557 if (length
== 0xffffffff)
16559 length
= bfd_get_64 (abfd
, buf
+ 4);
16562 else if (length
== 0)
16564 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16565 length
= bfd_get_64 (abfd
, buf
);
16576 /* Cover function for read_initial_length.
16577 Returns the length of the object at BUF, and stores the size of the
16578 initial length in *BYTES_READ and stores the size that offsets will be in
16580 If the initial length size is not equivalent to that specified in
16581 CU_HEADER then issue a complaint.
16582 This is useful when reading non-comp-unit headers. */
16585 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16586 const struct comp_unit_head
*cu_header
,
16587 unsigned int *bytes_read
,
16588 unsigned int *offset_size
)
16590 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16592 gdb_assert (cu_header
->initial_length_size
== 4
16593 || cu_header
->initial_length_size
== 8
16594 || cu_header
->initial_length_size
== 12);
16596 if (cu_header
->initial_length_size
!= *bytes_read
)
16597 complaint (&symfile_complaints
,
16598 _("intermixed 32-bit and 64-bit DWARF sections"));
16600 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16604 /* Read an offset from the data stream. The size of the offset is
16605 given by cu_header->offset_size. */
16608 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16609 const struct comp_unit_head
*cu_header
,
16610 unsigned int *bytes_read
)
16612 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16614 *bytes_read
= cu_header
->offset_size
;
16618 /* Read an offset from the data stream. */
16621 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16623 LONGEST retval
= 0;
16625 switch (offset_size
)
16628 retval
= bfd_get_32 (abfd
, buf
);
16631 retval
= bfd_get_64 (abfd
, buf
);
16634 internal_error (__FILE__
, __LINE__
,
16635 _("read_offset_1: bad switch [in module %s]"),
16636 bfd_get_filename (abfd
));
16642 static const gdb_byte
*
16643 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16645 /* If the size of a host char is 8 bits, we can return a pointer
16646 to the buffer, otherwise we have to copy the data to a buffer
16647 allocated on the temporary obstack. */
16648 gdb_assert (HOST_CHAR_BIT
== 8);
16652 static const char *
16653 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16654 unsigned int *bytes_read_ptr
)
16656 /* If the size of a host char is 8 bits, we can return a pointer
16657 to the string, otherwise we have to copy the string to a buffer
16658 allocated on the temporary obstack. */
16659 gdb_assert (HOST_CHAR_BIT
== 8);
16662 *bytes_read_ptr
= 1;
16665 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16666 return (const char *) buf
;
16669 static const char *
16670 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16672 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16673 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16674 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16675 bfd_get_filename (abfd
));
16676 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16677 error (_("DW_FORM_strp pointing outside of "
16678 ".debug_str section [in module %s]"),
16679 bfd_get_filename (abfd
));
16680 gdb_assert (HOST_CHAR_BIT
== 8);
16681 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16683 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16686 /* Read a string at offset STR_OFFSET in the .debug_str section from
16687 the .dwz file DWZ. Throw an error if the offset is too large. If
16688 the string consists of a single NUL byte, return NULL; otherwise
16689 return a pointer to the string. */
16691 static const char *
16692 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16694 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16696 if (dwz
->str
.buffer
== NULL
)
16697 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16698 "section [in module %s]"),
16699 bfd_get_filename (dwz
->dwz_bfd
));
16700 if (str_offset
>= dwz
->str
.size
)
16701 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16702 ".debug_str section [in module %s]"),
16703 bfd_get_filename (dwz
->dwz_bfd
));
16704 gdb_assert (HOST_CHAR_BIT
== 8);
16705 if (dwz
->str
.buffer
[str_offset
] == '\0')
16707 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16710 static const char *
16711 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16712 const struct comp_unit_head
*cu_header
,
16713 unsigned int *bytes_read_ptr
)
16715 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16717 return read_indirect_string_at_offset (abfd
, str_offset
);
16721 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16722 unsigned int *bytes_read_ptr
)
16725 unsigned int num_read
;
16727 unsigned char byte
;
16735 byte
= bfd_get_8 (abfd
, buf
);
16738 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16739 if ((byte
& 128) == 0)
16745 *bytes_read_ptr
= num_read
;
16750 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16751 unsigned int *bytes_read_ptr
)
16754 int i
, shift
, num_read
;
16755 unsigned char byte
;
16763 byte
= bfd_get_8 (abfd
, buf
);
16766 result
|= ((LONGEST
) (byte
& 127) << shift
);
16768 if ((byte
& 128) == 0)
16773 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16774 result
|= -(((LONGEST
) 1) << shift
);
16775 *bytes_read_ptr
= num_read
;
16779 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16780 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16781 ADDR_SIZE is the size of addresses from the CU header. */
16784 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16786 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16787 bfd
*abfd
= objfile
->obfd
;
16788 const gdb_byte
*info_ptr
;
16790 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16791 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16792 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16793 objfile_name (objfile
));
16794 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16795 error (_("DW_FORM_addr_index pointing outside of "
16796 ".debug_addr section [in module %s]"),
16797 objfile_name (objfile
));
16798 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16799 + addr_base
+ addr_index
* addr_size
);
16800 if (addr_size
== 4)
16801 return bfd_get_32 (abfd
, info_ptr
);
16803 return bfd_get_64 (abfd
, info_ptr
);
16806 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16809 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16811 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16814 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16817 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16818 unsigned int *bytes_read
)
16820 bfd
*abfd
= cu
->objfile
->obfd
;
16821 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16823 return read_addr_index (cu
, addr_index
);
16826 /* Data structure to pass results from dwarf2_read_addr_index_reader
16827 back to dwarf2_read_addr_index. */
16829 struct dwarf2_read_addr_index_data
16831 ULONGEST addr_base
;
16835 /* die_reader_func for dwarf2_read_addr_index. */
16838 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16839 const gdb_byte
*info_ptr
,
16840 struct die_info
*comp_unit_die
,
16844 struct dwarf2_cu
*cu
= reader
->cu
;
16845 struct dwarf2_read_addr_index_data
*aidata
=
16846 (struct dwarf2_read_addr_index_data
*) data
;
16848 aidata
->addr_base
= cu
->addr_base
;
16849 aidata
->addr_size
= cu
->header
.addr_size
;
16852 /* Given an index in .debug_addr, fetch the value.
16853 NOTE: This can be called during dwarf expression evaluation,
16854 long after the debug information has been read, and thus per_cu->cu
16855 may no longer exist. */
16858 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16859 unsigned int addr_index
)
16861 struct objfile
*objfile
= per_cu
->objfile
;
16862 struct dwarf2_cu
*cu
= per_cu
->cu
;
16863 ULONGEST addr_base
;
16866 /* This is intended to be called from outside this file. */
16867 dw2_setup (objfile
);
16869 /* We need addr_base and addr_size.
16870 If we don't have PER_CU->cu, we have to get it.
16871 Nasty, but the alternative is storing the needed info in PER_CU,
16872 which at this point doesn't seem justified: it's not clear how frequently
16873 it would get used and it would increase the size of every PER_CU.
16874 Entry points like dwarf2_per_cu_addr_size do a similar thing
16875 so we're not in uncharted territory here.
16876 Alas we need to be a bit more complicated as addr_base is contained
16879 We don't need to read the entire CU(/TU).
16880 We just need the header and top level die.
16882 IWBN to use the aging mechanism to let us lazily later discard the CU.
16883 For now we skip this optimization. */
16887 addr_base
= cu
->addr_base
;
16888 addr_size
= cu
->header
.addr_size
;
16892 struct dwarf2_read_addr_index_data aidata
;
16894 /* Note: We can't use init_cutu_and_read_dies_simple here,
16895 we need addr_base. */
16896 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16897 dwarf2_read_addr_index_reader
, &aidata
);
16898 addr_base
= aidata
.addr_base
;
16899 addr_size
= aidata
.addr_size
;
16902 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16905 /* Given a DW_FORM_GNU_str_index, fetch the string.
16906 This is only used by the Fission support. */
16908 static const char *
16909 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16911 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16912 const char *objf_name
= objfile_name (objfile
);
16913 bfd
*abfd
= objfile
->obfd
;
16914 struct dwarf2_cu
*cu
= reader
->cu
;
16915 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
16916 struct dwarf2_section_info
*str_offsets_section
=
16917 &reader
->dwo_file
->sections
.str_offsets
;
16918 const gdb_byte
*info_ptr
;
16919 ULONGEST str_offset
;
16920 static const char form_name
[] = "DW_FORM_GNU_str_index";
16922 dwarf2_read_section (objfile
, str_section
);
16923 dwarf2_read_section (objfile
, str_offsets_section
);
16924 if (str_section
->buffer
== NULL
)
16925 error (_("%s used without .debug_str.dwo section"
16926 " in CU at offset 0x%lx [in module %s]"),
16927 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16928 if (str_offsets_section
->buffer
== NULL
)
16929 error (_("%s used without .debug_str_offsets.dwo section"
16930 " in CU at offset 0x%lx [in module %s]"),
16931 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16932 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
16933 error (_("%s pointing outside of .debug_str_offsets.dwo"
16934 " section in CU at offset 0x%lx [in module %s]"),
16935 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16936 info_ptr
= (str_offsets_section
->buffer
16937 + str_index
* cu
->header
.offset_size
);
16938 if (cu
->header
.offset_size
== 4)
16939 str_offset
= bfd_get_32 (abfd
, info_ptr
);
16941 str_offset
= bfd_get_64 (abfd
, info_ptr
);
16942 if (str_offset
>= str_section
->size
)
16943 error (_("Offset from %s pointing outside of"
16944 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
16945 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16946 return (const char *) (str_section
->buffer
+ str_offset
);
16949 /* Return the length of an LEB128 number in BUF. */
16952 leb128_size (const gdb_byte
*buf
)
16954 const gdb_byte
*begin
= buf
;
16960 if ((byte
& 128) == 0)
16961 return buf
- begin
;
16966 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
16975 cu
->language
= language_c
;
16977 case DW_LANG_C_plus_plus
:
16978 case DW_LANG_C_plus_plus_11
:
16979 case DW_LANG_C_plus_plus_14
:
16980 cu
->language
= language_cplus
;
16983 cu
->language
= language_d
;
16985 case DW_LANG_Fortran77
:
16986 case DW_LANG_Fortran90
:
16987 case DW_LANG_Fortran95
:
16988 case DW_LANG_Fortran03
:
16989 case DW_LANG_Fortran08
:
16990 cu
->language
= language_fortran
;
16993 cu
->language
= language_go
;
16995 case DW_LANG_Mips_Assembler
:
16996 cu
->language
= language_asm
;
16999 cu
->language
= language_java
;
17001 case DW_LANG_Ada83
:
17002 case DW_LANG_Ada95
:
17003 cu
->language
= language_ada
;
17005 case DW_LANG_Modula2
:
17006 cu
->language
= language_m2
;
17008 case DW_LANG_Pascal83
:
17009 cu
->language
= language_pascal
;
17012 cu
->language
= language_objc
;
17014 case DW_LANG_Cobol74
:
17015 case DW_LANG_Cobol85
:
17017 cu
->language
= language_minimal
;
17020 cu
->language_defn
= language_def (cu
->language
);
17023 /* Return the named attribute or NULL if not there. */
17025 static struct attribute
*
17026 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17031 struct attribute
*spec
= NULL
;
17033 for (i
= 0; i
< die
->num_attrs
; ++i
)
17035 if (die
->attrs
[i
].name
== name
)
17036 return &die
->attrs
[i
];
17037 if (die
->attrs
[i
].name
== DW_AT_specification
17038 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
17039 spec
= &die
->attrs
[i
];
17045 die
= follow_die_ref (die
, spec
, &cu
);
17051 /* Return the named attribute or NULL if not there,
17052 but do not follow DW_AT_specification, etc.
17053 This is for use in contexts where we're reading .debug_types dies.
17054 Following DW_AT_specification, DW_AT_abstract_origin will take us
17055 back up the chain, and we want to go down. */
17057 static struct attribute
*
17058 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17062 for (i
= 0; i
< die
->num_attrs
; ++i
)
17063 if (die
->attrs
[i
].name
== name
)
17064 return &die
->attrs
[i
];
17069 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17070 and holds a non-zero value. This function should only be used for
17071 DW_FORM_flag or DW_FORM_flag_present attributes. */
17074 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17076 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17078 return (attr
&& DW_UNSND (attr
));
17082 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17084 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17085 which value is non-zero. However, we have to be careful with
17086 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17087 (via dwarf2_flag_true_p) follows this attribute. So we may
17088 end up accidently finding a declaration attribute that belongs
17089 to a different DIE referenced by the specification attribute,
17090 even though the given DIE does not have a declaration attribute. */
17091 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17092 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17095 /* Return the die giving the specification for DIE, if there is
17096 one. *SPEC_CU is the CU containing DIE on input, and the CU
17097 containing the return value on output. If there is no
17098 specification, but there is an abstract origin, that is
17101 static struct die_info
*
17102 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17104 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17107 if (spec_attr
== NULL
)
17108 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17110 if (spec_attr
== NULL
)
17113 return follow_die_ref (die
, spec_attr
, spec_cu
);
17116 /* Free the line_header structure *LH, and any arrays and strings it
17118 NOTE: This is also used as a "cleanup" function. */
17121 free_line_header (struct line_header
*lh
)
17123 if (lh
->standard_opcode_lengths
)
17124 xfree (lh
->standard_opcode_lengths
);
17126 /* Remember that all the lh->file_names[i].name pointers are
17127 pointers into debug_line_buffer, and don't need to be freed. */
17128 if (lh
->file_names
)
17129 xfree (lh
->file_names
);
17131 /* Similarly for the include directory names. */
17132 if (lh
->include_dirs
)
17133 xfree (lh
->include_dirs
);
17138 /* Stub for free_line_header to match void * callback types. */
17141 free_line_header_voidp (void *arg
)
17143 struct line_header
*lh
= arg
;
17145 free_line_header (lh
);
17148 /* Add an entry to LH's include directory table. */
17151 add_include_dir (struct line_header
*lh
, const char *include_dir
)
17153 /* Grow the array if necessary. */
17154 if (lh
->include_dirs_size
== 0)
17156 lh
->include_dirs_size
= 1; /* for testing */
17157 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
17158 * sizeof (*lh
->include_dirs
));
17160 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
17162 lh
->include_dirs_size
*= 2;
17163 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
17164 (lh
->include_dirs_size
17165 * sizeof (*lh
->include_dirs
)));
17168 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
17171 /* Add an entry to LH's file name table. */
17174 add_file_name (struct line_header
*lh
,
17176 unsigned int dir_index
,
17177 unsigned int mod_time
,
17178 unsigned int length
)
17180 struct file_entry
*fe
;
17182 /* Grow the array if necessary. */
17183 if (lh
->file_names_size
== 0)
17185 lh
->file_names_size
= 1; /* for testing */
17186 lh
->file_names
= xmalloc (lh
->file_names_size
17187 * sizeof (*lh
->file_names
));
17189 else if (lh
->num_file_names
>= lh
->file_names_size
)
17191 lh
->file_names_size
*= 2;
17192 lh
->file_names
= xrealloc (lh
->file_names
,
17193 (lh
->file_names_size
17194 * sizeof (*lh
->file_names
)));
17197 fe
= &lh
->file_names
[lh
->num_file_names
++];
17199 fe
->dir_index
= dir_index
;
17200 fe
->mod_time
= mod_time
;
17201 fe
->length
= length
;
17202 fe
->included_p
= 0;
17206 /* A convenience function to find the proper .debug_line section for a CU. */
17208 static struct dwarf2_section_info
*
17209 get_debug_line_section (struct dwarf2_cu
*cu
)
17211 struct dwarf2_section_info
*section
;
17213 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17215 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17216 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17217 else if (cu
->per_cu
->is_dwz
)
17219 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17221 section
= &dwz
->line
;
17224 section
= &dwarf2_per_objfile
->line
;
17229 /* Read the statement program header starting at OFFSET in
17230 .debug_line, or .debug_line.dwo. Return a pointer
17231 to a struct line_header, allocated using xmalloc.
17232 Returns NULL if there is a problem reading the header, e.g., if it
17233 has a version we don't understand.
17235 NOTE: the strings in the include directory and file name tables of
17236 the returned object point into the dwarf line section buffer,
17237 and must not be freed. */
17239 static struct line_header
*
17240 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
17242 struct cleanup
*back_to
;
17243 struct line_header
*lh
;
17244 const gdb_byte
*line_ptr
;
17245 unsigned int bytes_read
, offset_size
;
17247 const char *cur_dir
, *cur_file
;
17248 struct dwarf2_section_info
*section
;
17251 section
= get_debug_line_section (cu
);
17252 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17253 if (section
->buffer
== NULL
)
17255 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17256 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17258 complaint (&symfile_complaints
, _("missing .debug_line section"));
17262 /* We can't do this until we know the section is non-empty.
17263 Only then do we know we have such a section. */
17264 abfd
= get_section_bfd_owner (section
);
17266 /* Make sure that at least there's room for the total_length field.
17267 That could be 12 bytes long, but we're just going to fudge that. */
17268 if (offset
+ 4 >= section
->size
)
17270 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17274 lh
= xmalloc (sizeof (*lh
));
17275 memset (lh
, 0, sizeof (*lh
));
17276 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
17279 lh
->offset
.sect_off
= offset
;
17280 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
17282 line_ptr
= section
->buffer
+ offset
;
17284 /* Read in the header. */
17286 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17287 &bytes_read
, &offset_size
);
17288 line_ptr
+= bytes_read
;
17289 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17291 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17292 do_cleanups (back_to
);
17295 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17296 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17298 if (lh
->version
> 4)
17300 /* This is a version we don't understand. The format could have
17301 changed in ways we don't handle properly so just punt. */
17302 complaint (&symfile_complaints
,
17303 _("unsupported version in .debug_line section"));
17306 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
17307 line_ptr
+= offset_size
;
17308 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
17310 if (lh
->version
>= 4)
17312 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
17316 lh
->maximum_ops_per_instruction
= 1;
17318 if (lh
->maximum_ops_per_instruction
== 0)
17320 lh
->maximum_ops_per_instruction
= 1;
17321 complaint (&symfile_complaints
,
17322 _("invalid maximum_ops_per_instruction "
17323 "in `.debug_line' section"));
17326 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
17328 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
17330 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
17332 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
17334 lh
->standard_opcode_lengths
17335 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
17337 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
17338 for (i
= 1; i
< lh
->opcode_base
; ++i
)
17340 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
17344 /* Read directory table. */
17345 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17347 line_ptr
+= bytes_read
;
17348 add_include_dir (lh
, cur_dir
);
17350 line_ptr
+= bytes_read
;
17352 /* Read file name table. */
17353 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17355 unsigned int dir_index
, mod_time
, length
;
17357 line_ptr
+= bytes_read
;
17358 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17359 line_ptr
+= bytes_read
;
17360 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17361 line_ptr
+= bytes_read
;
17362 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17363 line_ptr
+= bytes_read
;
17365 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17367 line_ptr
+= bytes_read
;
17368 lh
->statement_program_start
= line_ptr
;
17370 if (line_ptr
> (section
->buffer
+ section
->size
))
17371 complaint (&symfile_complaints
,
17372 _("line number info header doesn't "
17373 "fit in `.debug_line' section"));
17375 discard_cleanups (back_to
);
17379 /* Subroutine of dwarf_decode_lines to simplify it.
17380 Return the file name of the psymtab for included file FILE_INDEX
17381 in line header LH of PST.
17382 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17383 If space for the result is malloc'd, it will be freed by a cleanup.
17384 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17386 The function creates dangling cleanup registration. */
17388 static const char *
17389 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
17390 const struct partial_symtab
*pst
,
17391 const char *comp_dir
)
17393 const struct file_entry fe
= lh
->file_names
[file_index
];
17394 const char *include_name
= fe
.name
;
17395 const char *include_name_to_compare
= include_name
;
17396 const char *dir_name
= NULL
;
17397 const char *pst_filename
;
17398 char *copied_name
= NULL
;
17401 if (fe
.dir_index
&& lh
->include_dirs
!= NULL
)
17402 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17404 if (!IS_ABSOLUTE_PATH (include_name
)
17405 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17407 /* Avoid creating a duplicate psymtab for PST.
17408 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17409 Before we do the comparison, however, we need to account
17410 for DIR_NAME and COMP_DIR.
17411 First prepend dir_name (if non-NULL). If we still don't
17412 have an absolute path prepend comp_dir (if non-NULL).
17413 However, the directory we record in the include-file's
17414 psymtab does not contain COMP_DIR (to match the
17415 corresponding symtab(s)).
17420 bash$ gcc -g ./hello.c
17421 include_name = "hello.c"
17423 DW_AT_comp_dir = comp_dir = "/tmp"
17424 DW_AT_name = "./hello.c"
17428 if (dir_name
!= NULL
)
17430 char *tem
= concat (dir_name
, SLASH_STRING
,
17431 include_name
, (char *)NULL
);
17433 make_cleanup (xfree
, tem
);
17434 include_name
= tem
;
17435 include_name_to_compare
= include_name
;
17437 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
17439 char *tem
= concat (comp_dir
, SLASH_STRING
,
17440 include_name
, (char *)NULL
);
17442 make_cleanup (xfree
, tem
);
17443 include_name_to_compare
= tem
;
17447 pst_filename
= pst
->filename
;
17448 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
17450 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
17451 pst_filename
, (char *)NULL
);
17452 pst_filename
= copied_name
;
17455 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
17457 if (copied_name
!= NULL
)
17458 xfree (copied_name
);
17462 return include_name
;
17465 /* Ignore this record_line request. */
17468 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17473 /* Return non-zero if we should add LINE to the line number table.
17474 LINE is the line to add, LAST_LINE is the last line that was added,
17475 LAST_SUBFILE is the subfile for LAST_LINE.
17476 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
17477 had a non-zero discriminator.
17479 We have to be careful in the presence of discriminators.
17480 E.g., for this line:
17482 for (i = 0; i < 100000; i++);
17484 clang can emit four line number entries for that one line,
17485 each with a different discriminator.
17486 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
17488 However, we want gdb to coalesce all four entries into one.
17489 Otherwise the user could stepi into the middle of the line and
17490 gdb would get confused about whether the pc really was in the
17491 middle of the line.
17493 Things are further complicated by the fact that two consecutive
17494 line number entries for the same line is a heuristic used by gcc
17495 to denote the end of the prologue. So we can't just discard duplicate
17496 entries, we have to be selective about it. The heuristic we use is
17497 that we only collapse consecutive entries for the same line if at least
17498 one of those entries has a non-zero discriminator. PR 17276.
17500 Note: Addresses in the line number state machine can never go backwards
17501 within one sequence, thus this coalescing is ok. */
17504 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
17505 int line_has_non_zero_discriminator
,
17506 struct subfile
*last_subfile
)
17508 if (current_subfile
!= last_subfile
)
17510 if (line
!= last_line
)
17512 /* Same line for the same file that we've seen already.
17513 As a last check, for pr 17276, only record the line if the line
17514 has never had a non-zero discriminator. */
17515 if (!line_has_non_zero_discriminator
)
17520 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
17521 in the line table of subfile SUBFILE. */
17524 dwarf_record_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17525 unsigned int line
, CORE_ADDR address
,
17526 record_line_ftype p_record_line
)
17528 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17530 (*p_record_line
) (subfile
, line
, addr
);
17533 /* Subroutine of dwarf_decode_lines_1 to simplify it.
17534 Mark the end of a set of line number records.
17535 The arguments are the same as for dwarf_record_line.
17536 If SUBFILE is NULL the request is ignored. */
17539 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17540 CORE_ADDR address
, record_line_ftype p_record_line
)
17542 if (subfile
!= NULL
)
17543 dwarf_record_line (gdbarch
, subfile
, 0, address
, p_record_line
);
17546 /* Subroutine of dwarf_decode_lines to simplify it.
17547 Process the line number information in LH. */
17550 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
17551 const int decode_for_pst_p
, CORE_ADDR lowpc
)
17553 const gdb_byte
*line_ptr
, *extended_end
;
17554 const gdb_byte
*line_end
;
17555 unsigned int bytes_read
, extended_len
;
17556 unsigned char op_code
, extended_op
;
17557 CORE_ADDR baseaddr
;
17558 struct objfile
*objfile
= cu
->objfile
;
17559 bfd
*abfd
= objfile
->obfd
;
17560 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17561 struct subfile
*last_subfile
= NULL
;
17562 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17565 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17567 line_ptr
= lh
->statement_program_start
;
17568 line_end
= lh
->statement_program_end
;
17570 /* Read the statement sequences until there's nothing left. */
17571 while (line_ptr
< line_end
)
17573 /* State machine registers. Call `gdbarch_adjust_dwarf2_line'
17574 on the initial 0 address as if there was a line entry for it
17575 so that the backend has a chance to adjust it and also record
17576 it in case it needs it. This is currently used by MIPS code,
17577 cf. `mips_adjust_dwarf2_line'. */
17578 CORE_ADDR address
= gdbarch_adjust_dwarf2_line (gdbarch
, 0, 0);
17579 unsigned int file
= 1;
17580 unsigned int line
= 1;
17581 int is_stmt
= lh
->default_is_stmt
;
17582 int end_sequence
= 0;
17583 unsigned char op_index
= 0;
17584 unsigned int discriminator
= 0;
17585 /* The last line number that was recorded, used to coalesce
17586 consecutive entries for the same line. This can happen, for
17587 example, when discriminators are present. PR 17276. */
17588 unsigned int last_line
= 0;
17589 int line_has_non_zero_discriminator
= 0;
17591 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
17593 /* Start a subfile for the current file of the state machine. */
17594 /* lh->include_dirs and lh->file_names are 0-based, but the
17595 directory and file name numbers in the statement program
17597 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
17598 const char *dir
= NULL
;
17600 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17601 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17603 dwarf2_start_subfile (fe
->name
, dir
);
17606 /* Decode the table. */
17607 while (!end_sequence
)
17609 op_code
= read_1_byte (abfd
, line_ptr
);
17611 if (line_ptr
> line_end
)
17613 dwarf2_debug_line_missing_end_sequence_complaint ();
17617 if (op_code
>= lh
->opcode_base
)
17619 /* Special opcode. */
17620 unsigned char adj_opcode
;
17621 CORE_ADDR addr_adj
;
17624 adj_opcode
= op_code
- lh
->opcode_base
;
17625 addr_adj
= (((op_index
+ (adj_opcode
/ lh
->line_range
))
17626 / lh
->maximum_ops_per_instruction
)
17627 * lh
->minimum_instruction_length
);
17628 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17629 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
17630 % lh
->maximum_ops_per_instruction
);
17631 line_delta
= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17632 line
+= line_delta
;
17633 if (line_delta
!= 0)
17634 line_has_non_zero_discriminator
= discriminator
!= 0;
17635 if (lh
->num_file_names
< file
|| file
== 0)
17636 dwarf2_debug_line_missing_file_complaint ();
17637 /* For now we ignore lines not starting on an
17638 instruction boundary. */
17639 else if (op_index
== 0)
17641 lh
->file_names
[file
- 1].included_p
= 1;
17642 if (!decode_for_pst_p
&& is_stmt
)
17644 if (last_subfile
!= current_subfile
)
17646 dwarf_finish_line (gdbarch
, last_subfile
,
17647 address
, p_record_line
);
17649 if (dwarf_record_line_p (line
, last_line
,
17650 line_has_non_zero_discriminator
,
17653 dwarf_record_line (gdbarch
, current_subfile
,
17654 line
, address
, p_record_line
);
17656 last_subfile
= current_subfile
;
17662 else switch (op_code
)
17664 case DW_LNS_extended_op
:
17665 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17667 line_ptr
+= bytes_read
;
17668 extended_end
= line_ptr
+ extended_len
;
17669 extended_op
= read_1_byte (abfd
, line_ptr
);
17671 switch (extended_op
)
17673 case DW_LNE_end_sequence
:
17674 p_record_line
= record_line
;
17677 case DW_LNE_set_address
:
17678 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17680 /* If address < lowpc then it's not a usable value, it's
17681 outside the pc range of the CU. However, we restrict
17682 the test to only address values of zero to preserve
17683 GDB's previous behaviour which is to handle the specific
17684 case of a function being GC'd by the linker. */
17685 if (address
== 0 && address
< lowpc
)
17687 /* This line table is for a function which has been
17688 GCd by the linker. Ignore it. PR gdb/12528 */
17691 = line_ptr
- get_debug_line_section (cu
)->buffer
;
17693 complaint (&symfile_complaints
,
17694 _(".debug_line address at offset 0x%lx is 0 "
17696 line_offset
, objfile_name (objfile
));
17697 p_record_line
= noop_record_line
;
17698 /* Note: p_record_line is left as noop_record_line
17699 until we see DW_LNE_end_sequence. */
17703 line_ptr
+= bytes_read
;
17704 address
+= baseaddr
;
17705 address
= gdbarch_adjust_dwarf2_line (gdbarch
, address
, 0);
17707 case DW_LNE_define_file
:
17709 const char *cur_file
;
17710 unsigned int dir_index
, mod_time
, length
;
17712 cur_file
= read_direct_string (abfd
, line_ptr
,
17714 line_ptr
+= bytes_read
;
17716 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17717 line_ptr
+= bytes_read
;
17719 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17720 line_ptr
+= bytes_read
;
17722 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17723 line_ptr
+= bytes_read
;
17724 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17727 case DW_LNE_set_discriminator
:
17728 /* The discriminator is not interesting to the debugger;
17729 just ignore it. We still need to check its value though:
17730 if there are consecutive entries for the same
17731 (non-prologue) line we want to coalesce them.
17733 discriminator
= read_unsigned_leb128 (abfd
, line_ptr
,
17735 line_has_non_zero_discriminator
|= discriminator
!= 0;
17736 line_ptr
+= bytes_read
;
17739 complaint (&symfile_complaints
,
17740 _("mangled .debug_line section"));
17743 /* Make sure that we parsed the extended op correctly. If e.g.
17744 we expected a different address size than the producer used,
17745 we may have read the wrong number of bytes. */
17746 if (line_ptr
!= extended_end
)
17748 complaint (&symfile_complaints
,
17749 _("mangled .debug_line section"));
17754 if (lh
->num_file_names
< file
|| file
== 0)
17755 dwarf2_debug_line_missing_file_complaint ();
17758 lh
->file_names
[file
- 1].included_p
= 1;
17759 if (!decode_for_pst_p
&& is_stmt
)
17761 if (last_subfile
!= current_subfile
)
17763 dwarf_finish_line (gdbarch
, last_subfile
,
17764 address
, p_record_line
);
17766 if (dwarf_record_line_p (line
, last_line
,
17767 line_has_non_zero_discriminator
,
17770 dwarf_record_line (gdbarch
, current_subfile
,
17771 line
, address
, p_record_line
);
17773 last_subfile
= current_subfile
;
17779 case DW_LNS_advance_pc
:
17782 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17783 CORE_ADDR addr_adj
;
17785 addr_adj
= (((op_index
+ adjust
)
17786 / lh
->maximum_ops_per_instruction
)
17787 * lh
->minimum_instruction_length
);
17788 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17789 op_index
= ((op_index
+ adjust
)
17790 % lh
->maximum_ops_per_instruction
);
17791 line_ptr
+= bytes_read
;
17794 case DW_LNS_advance_line
:
17797 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
17799 line
+= line_delta
;
17800 if (line_delta
!= 0)
17801 line_has_non_zero_discriminator
= discriminator
!= 0;
17802 line_ptr
+= bytes_read
;
17805 case DW_LNS_set_file
:
17807 /* The arrays lh->include_dirs and lh->file_names are
17808 0-based, but the directory and file name numbers in
17809 the statement program are 1-based. */
17810 struct file_entry
*fe
;
17811 const char *dir
= NULL
;
17813 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17814 line_ptr
+= bytes_read
;
17815 if (lh
->num_file_names
< file
|| file
== 0)
17816 dwarf2_debug_line_missing_file_complaint ();
17819 fe
= &lh
->file_names
[file
- 1];
17820 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17821 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17822 if (!decode_for_pst_p
)
17824 last_subfile
= current_subfile
;
17825 line_has_non_zero_discriminator
= discriminator
!= 0;
17826 dwarf2_start_subfile (fe
->name
, dir
);
17831 case DW_LNS_set_column
:
17832 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17833 line_ptr
+= bytes_read
;
17835 case DW_LNS_negate_stmt
:
17836 is_stmt
= (!is_stmt
);
17838 case DW_LNS_set_basic_block
:
17840 /* Add to the address register of the state machine the
17841 address increment value corresponding to special opcode
17842 255. I.e., this value is scaled by the minimum
17843 instruction length since special opcode 255 would have
17844 scaled the increment. */
17845 case DW_LNS_const_add_pc
:
17847 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
17848 CORE_ADDR addr_adj
;
17850 addr_adj
= (((op_index
+ adjust
)
17851 / lh
->maximum_ops_per_instruction
)
17852 * lh
->minimum_instruction_length
);
17853 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17854 op_index
= ((op_index
+ adjust
)
17855 % lh
->maximum_ops_per_instruction
);
17858 case DW_LNS_fixed_advance_pc
:
17860 CORE_ADDR addr_adj
;
17862 addr_adj
= read_2_bytes (abfd
, line_ptr
);
17863 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17870 /* Unknown standard opcode, ignore it. */
17873 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
17875 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17876 line_ptr
+= bytes_read
;
17881 if (lh
->num_file_names
< file
|| file
== 0)
17882 dwarf2_debug_line_missing_file_complaint ();
17885 lh
->file_names
[file
- 1].included_p
= 1;
17886 if (!decode_for_pst_p
)
17888 dwarf_finish_line (gdbarch
, current_subfile
, address
,
17895 /* Decode the Line Number Program (LNP) for the given line_header
17896 structure and CU. The actual information extracted and the type
17897 of structures created from the LNP depends on the value of PST.
17899 1. If PST is NULL, then this procedure uses the data from the program
17900 to create all necessary symbol tables, and their linetables.
17902 2. If PST is not NULL, this procedure reads the program to determine
17903 the list of files included by the unit represented by PST, and
17904 builds all the associated partial symbol tables.
17906 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17907 It is used for relative paths in the line table.
17908 NOTE: When processing partial symtabs (pst != NULL),
17909 comp_dir == pst->dirname.
17911 NOTE: It is important that psymtabs have the same file name (via strcmp)
17912 as the corresponding symtab. Since COMP_DIR is not used in the name of the
17913 symtab we don't use it in the name of the psymtabs we create.
17914 E.g. expand_line_sal requires this when finding psymtabs to expand.
17915 A good testcase for this is mb-inline.exp.
17917 LOWPC is the lowest address in CU (or 0 if not known).
17919 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
17920 for its PC<->lines mapping information. Otherwise only the filename
17921 table is read in. */
17924 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
17925 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
17926 CORE_ADDR lowpc
, int decode_mapping
)
17928 struct objfile
*objfile
= cu
->objfile
;
17929 const int decode_for_pst_p
= (pst
!= NULL
);
17931 if (decode_mapping
)
17932 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
17934 if (decode_for_pst_p
)
17938 /* Now that we're done scanning the Line Header Program, we can
17939 create the psymtab of each included file. */
17940 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
17941 if (lh
->file_names
[file_index
].included_p
== 1)
17943 const char *include_name
=
17944 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
17945 if (include_name
!= NULL
)
17946 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
17951 /* Make sure a symtab is created for every file, even files
17952 which contain only variables (i.e. no code with associated
17954 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
17957 for (i
= 0; i
< lh
->num_file_names
; i
++)
17959 const char *dir
= NULL
;
17960 struct file_entry
*fe
;
17962 fe
= &lh
->file_names
[i
];
17963 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17964 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17965 dwarf2_start_subfile (fe
->name
, dir
);
17967 if (current_subfile
->symtab
== NULL
)
17969 current_subfile
->symtab
17970 = allocate_symtab (cust
, current_subfile
->name
);
17972 fe
->symtab
= current_subfile
->symtab
;
17977 /* Start a subfile for DWARF. FILENAME is the name of the file and
17978 DIRNAME the name of the source directory which contains FILENAME
17979 or NULL if not known.
17980 This routine tries to keep line numbers from identical absolute and
17981 relative file names in a common subfile.
17983 Using the `list' example from the GDB testsuite, which resides in
17984 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
17985 of /srcdir/list0.c yields the following debugging information for list0.c:
17987 DW_AT_name: /srcdir/list0.c
17988 DW_AT_comp_dir: /compdir
17989 files.files[0].name: list0.h
17990 files.files[0].dir: /srcdir
17991 files.files[1].name: list0.c
17992 files.files[1].dir: /srcdir
17994 The line number information for list0.c has to end up in a single
17995 subfile, so that `break /srcdir/list0.c:1' works as expected.
17996 start_subfile will ensure that this happens provided that we pass the
17997 concatenation of files.files[1].dir and files.files[1].name as the
18001 dwarf2_start_subfile (const char *filename
, const char *dirname
)
18005 /* In order not to lose the line information directory,
18006 we concatenate it to the filename when it makes sense.
18007 Note that the Dwarf3 standard says (speaking of filenames in line
18008 information): ``The directory index is ignored for file names
18009 that represent full path names''. Thus ignoring dirname in the
18010 `else' branch below isn't an issue. */
18012 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
18014 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
18018 start_subfile (filename
);
18024 /* Start a symtab for DWARF.
18025 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
18027 static struct compunit_symtab
*
18028 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
18029 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
18031 struct compunit_symtab
*cust
18032 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
18034 record_debugformat ("DWARF 2");
18035 record_producer (cu
->producer
);
18037 /* We assume that we're processing GCC output. */
18038 processing_gcc_compilation
= 2;
18040 cu
->processing_has_namespace_info
= 0;
18046 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
18047 struct dwarf2_cu
*cu
)
18049 struct objfile
*objfile
= cu
->objfile
;
18050 struct comp_unit_head
*cu_header
= &cu
->header
;
18052 /* NOTE drow/2003-01-30: There used to be a comment and some special
18053 code here to turn a symbol with DW_AT_external and a
18054 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
18055 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
18056 with some versions of binutils) where shared libraries could have
18057 relocations against symbols in their debug information - the
18058 minimal symbol would have the right address, but the debug info
18059 would not. It's no longer necessary, because we will explicitly
18060 apply relocations when we read in the debug information now. */
18062 /* A DW_AT_location attribute with no contents indicates that a
18063 variable has been optimized away. */
18064 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
18066 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18070 /* Handle one degenerate form of location expression specially, to
18071 preserve GDB's previous behavior when section offsets are
18072 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
18073 then mark this symbol as LOC_STATIC. */
18075 if (attr_form_is_block (attr
)
18076 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
18077 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
18078 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
18079 && (DW_BLOCK (attr
)->size
18080 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
18082 unsigned int dummy
;
18084 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
18085 SYMBOL_VALUE_ADDRESS (sym
) =
18086 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
18088 SYMBOL_VALUE_ADDRESS (sym
) =
18089 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
18090 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
18091 fixup_symbol_section (sym
, objfile
);
18092 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
18093 SYMBOL_SECTION (sym
));
18097 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
18098 expression evaluator, and use LOC_COMPUTED only when necessary
18099 (i.e. when the value of a register or memory location is
18100 referenced, or a thread-local block, etc.). Then again, it might
18101 not be worthwhile. I'm assuming that it isn't unless performance
18102 or memory numbers show me otherwise. */
18104 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
18106 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
18107 cu
->has_loclist
= 1;
18110 /* Given a pointer to a DWARF information entry, figure out if we need
18111 to make a symbol table entry for it, and if so, create a new entry
18112 and return a pointer to it.
18113 If TYPE is NULL, determine symbol type from the die, otherwise
18114 used the passed type.
18115 If SPACE is not NULL, use it to hold the new symbol. If it is
18116 NULL, allocate a new symbol on the objfile's obstack. */
18118 static struct symbol
*
18119 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
18120 struct symbol
*space
)
18122 struct objfile
*objfile
= cu
->objfile
;
18123 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18124 struct symbol
*sym
= NULL
;
18126 struct attribute
*attr
= NULL
;
18127 struct attribute
*attr2
= NULL
;
18128 CORE_ADDR baseaddr
;
18129 struct pending
**list_to_add
= NULL
;
18131 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
18133 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18135 name
= dwarf2_name (die
, cu
);
18138 const char *linkagename
;
18139 int suppress_add
= 0;
18144 sym
= allocate_symbol (objfile
);
18145 OBJSTAT (objfile
, n_syms
++);
18147 /* Cache this symbol's name and the name's demangled form (if any). */
18148 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
18149 linkagename
= dwarf2_physname (name
, die
, cu
);
18150 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
18152 /* Fortran does not have mangling standard and the mangling does differ
18153 between gfortran, iFort etc. */
18154 if (cu
->language
== language_fortran
18155 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
18156 symbol_set_demangled_name (&(sym
->ginfo
),
18157 dwarf2_full_name (name
, die
, cu
),
18160 /* Default assumptions.
18161 Use the passed type or decode it from the die. */
18162 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18163 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18165 SYMBOL_TYPE (sym
) = type
;
18167 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
18168 attr
= dwarf2_attr (die
,
18169 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
18173 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
18176 attr
= dwarf2_attr (die
,
18177 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
18181 int file_index
= DW_UNSND (attr
);
18183 if (cu
->line_header
== NULL
18184 || file_index
> cu
->line_header
->num_file_names
)
18185 complaint (&symfile_complaints
,
18186 _("file index out of range"));
18187 else if (file_index
> 0)
18189 struct file_entry
*fe
;
18191 fe
= &cu
->line_header
->file_names
[file_index
- 1];
18192 symbol_set_symtab (sym
, fe
->symtab
);
18199 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
18204 addr
= attr_value_as_address (attr
);
18205 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
18206 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
18208 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
18209 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
18210 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
18211 add_symbol_to_list (sym
, cu
->list_in_scope
);
18213 case DW_TAG_subprogram
:
18214 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18216 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18217 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18218 if ((attr2
&& (DW_UNSND (attr2
) != 0))
18219 || cu
->language
== language_ada
)
18221 /* Subprograms marked external are stored as a global symbol.
18222 Ada subprograms, whether marked external or not, are always
18223 stored as a global symbol, because we want to be able to
18224 access them globally. For instance, we want to be able
18225 to break on a nested subprogram without having to
18226 specify the context. */
18227 list_to_add
= &global_symbols
;
18231 list_to_add
= cu
->list_in_scope
;
18234 case DW_TAG_inlined_subroutine
:
18235 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18237 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18238 SYMBOL_INLINED (sym
) = 1;
18239 list_to_add
= cu
->list_in_scope
;
18241 case DW_TAG_template_value_param
:
18243 /* Fall through. */
18244 case DW_TAG_constant
:
18245 case DW_TAG_variable
:
18246 case DW_TAG_member
:
18247 /* Compilation with minimal debug info may result in
18248 variables with missing type entries. Change the
18249 misleading `void' type to something sensible. */
18250 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
18252 = objfile_type (objfile
)->nodebug_data_symbol
;
18254 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18255 /* In the case of DW_TAG_member, we should only be called for
18256 static const members. */
18257 if (die
->tag
== DW_TAG_member
)
18259 /* dwarf2_add_field uses die_is_declaration,
18260 so we do the same. */
18261 gdb_assert (die_is_declaration (die
, cu
));
18266 dwarf2_const_value (attr
, sym
, cu
);
18267 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18270 if (attr2
&& (DW_UNSND (attr2
) != 0))
18271 list_to_add
= &global_symbols
;
18273 list_to_add
= cu
->list_in_scope
;
18277 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18280 var_decode_location (attr
, sym
, cu
);
18281 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18283 /* Fortran explicitly imports any global symbols to the local
18284 scope by DW_TAG_common_block. */
18285 if (cu
->language
== language_fortran
&& die
->parent
18286 && die
->parent
->tag
== DW_TAG_common_block
)
18289 if (SYMBOL_CLASS (sym
) == LOC_STATIC
18290 && SYMBOL_VALUE_ADDRESS (sym
) == 0
18291 && !dwarf2_per_objfile
->has_section_at_zero
)
18293 /* When a static variable is eliminated by the linker,
18294 the corresponding debug information is not stripped
18295 out, but the variable address is set to null;
18296 do not add such variables into symbol table. */
18298 else if (attr2
&& (DW_UNSND (attr2
) != 0))
18300 /* Workaround gfortran PR debug/40040 - it uses
18301 DW_AT_location for variables in -fPIC libraries which may
18302 get overriden by other libraries/executable and get
18303 a different address. Resolve it by the minimal symbol
18304 which may come from inferior's executable using copy
18305 relocation. Make this workaround only for gfortran as for
18306 other compilers GDB cannot guess the minimal symbol
18307 Fortran mangling kind. */
18308 if (cu
->language
== language_fortran
&& die
->parent
18309 && die
->parent
->tag
== DW_TAG_module
18311 && startswith (cu
->producer
, "GNU Fortran "))
18312 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18314 /* A variable with DW_AT_external is never static,
18315 but it may be block-scoped. */
18316 list_to_add
= (cu
->list_in_scope
== &file_symbols
18317 ? &global_symbols
: cu
->list_in_scope
);
18320 list_to_add
= cu
->list_in_scope
;
18324 /* We do not know the address of this symbol.
18325 If it is an external symbol and we have type information
18326 for it, enter the symbol as a LOC_UNRESOLVED symbol.
18327 The address of the variable will then be determined from
18328 the minimal symbol table whenever the variable is
18330 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18332 /* Fortran explicitly imports any global symbols to the local
18333 scope by DW_TAG_common_block. */
18334 if (cu
->language
== language_fortran
&& die
->parent
18335 && die
->parent
->tag
== DW_TAG_common_block
)
18337 /* SYMBOL_CLASS doesn't matter here because
18338 read_common_block is going to reset it. */
18340 list_to_add
= cu
->list_in_scope
;
18342 else if (attr2
&& (DW_UNSND (attr2
) != 0)
18343 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
18345 /* A variable with DW_AT_external is never static, but it
18346 may be block-scoped. */
18347 list_to_add
= (cu
->list_in_scope
== &file_symbols
18348 ? &global_symbols
: cu
->list_in_scope
);
18350 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18352 else if (!die_is_declaration (die
, cu
))
18354 /* Use the default LOC_OPTIMIZED_OUT class. */
18355 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
18357 list_to_add
= cu
->list_in_scope
;
18361 case DW_TAG_formal_parameter
:
18362 /* If we are inside a function, mark this as an argument. If
18363 not, we might be looking at an argument to an inlined function
18364 when we do not have enough information to show inlined frames;
18365 pretend it's a local variable in that case so that the user can
18367 if (context_stack_depth
> 0
18368 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
18369 SYMBOL_IS_ARGUMENT (sym
) = 1;
18370 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18373 var_decode_location (attr
, sym
, cu
);
18375 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18378 dwarf2_const_value (attr
, sym
, cu
);
18381 list_to_add
= cu
->list_in_scope
;
18383 case DW_TAG_unspecified_parameters
:
18384 /* From varargs functions; gdb doesn't seem to have any
18385 interest in this information, so just ignore it for now.
18388 case DW_TAG_template_type_param
:
18390 /* Fall through. */
18391 case DW_TAG_class_type
:
18392 case DW_TAG_interface_type
:
18393 case DW_TAG_structure_type
:
18394 case DW_TAG_union_type
:
18395 case DW_TAG_set_type
:
18396 case DW_TAG_enumeration_type
:
18397 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18398 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
18401 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
18402 really ever be static objects: otherwise, if you try
18403 to, say, break of a class's method and you're in a file
18404 which doesn't mention that class, it won't work unless
18405 the check for all static symbols in lookup_symbol_aux
18406 saves you. See the OtherFileClass tests in
18407 gdb.c++/namespace.exp. */
18411 list_to_add
= (cu
->list_in_scope
== &file_symbols
18412 && (cu
->language
== language_cplus
18413 || cu
->language
== language_java
)
18414 ? &global_symbols
: cu
->list_in_scope
);
18416 /* The semantics of C++ state that "struct foo {
18417 ... }" also defines a typedef for "foo". A Java
18418 class declaration also defines a typedef for the
18420 if (cu
->language
== language_cplus
18421 || cu
->language
== language_java
18422 || cu
->language
== language_ada
)
18424 /* The symbol's name is already allocated along
18425 with this objfile, so we don't need to
18426 duplicate it for the type. */
18427 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
18428 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
18433 case DW_TAG_typedef
:
18434 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18435 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18436 list_to_add
= cu
->list_in_scope
;
18438 case DW_TAG_base_type
:
18439 case DW_TAG_subrange_type
:
18440 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18441 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18442 list_to_add
= cu
->list_in_scope
;
18444 case DW_TAG_enumerator
:
18445 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18448 dwarf2_const_value (attr
, sym
, cu
);
18451 /* NOTE: carlton/2003-11-10: See comment above in the
18452 DW_TAG_class_type, etc. block. */
18454 list_to_add
= (cu
->list_in_scope
== &file_symbols
18455 && (cu
->language
== language_cplus
18456 || cu
->language
== language_java
)
18457 ? &global_symbols
: cu
->list_in_scope
);
18460 case DW_TAG_imported_declaration
:
18461 case DW_TAG_namespace
:
18462 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18463 list_to_add
= &global_symbols
;
18465 case DW_TAG_module
:
18466 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18467 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
18468 list_to_add
= &global_symbols
;
18470 case DW_TAG_common_block
:
18471 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
18472 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
18473 add_symbol_to_list (sym
, cu
->list_in_scope
);
18476 /* Not a tag we recognize. Hopefully we aren't processing
18477 trash data, but since we must specifically ignore things
18478 we don't recognize, there is nothing else we should do at
18480 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
18481 dwarf_tag_name (die
->tag
));
18487 sym
->hash_next
= objfile
->template_symbols
;
18488 objfile
->template_symbols
= sym
;
18489 list_to_add
= NULL
;
18492 if (list_to_add
!= NULL
)
18493 add_symbol_to_list (sym
, list_to_add
);
18495 /* For the benefit of old versions of GCC, check for anonymous
18496 namespaces based on the demangled name. */
18497 if (!cu
->processing_has_namespace_info
18498 && cu
->language
== language_cplus
)
18499 cp_scan_for_anonymous_namespaces (sym
, objfile
);
18504 /* A wrapper for new_symbol_full that always allocates a new symbol. */
18506 static struct symbol
*
18507 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18509 return new_symbol_full (die
, type
, cu
, NULL
);
18512 /* Given an attr with a DW_FORM_dataN value in host byte order,
18513 zero-extend it as appropriate for the symbol's type. The DWARF
18514 standard (v4) is not entirely clear about the meaning of using
18515 DW_FORM_dataN for a constant with a signed type, where the type is
18516 wider than the data. The conclusion of a discussion on the DWARF
18517 list was that this is unspecified. We choose to always zero-extend
18518 because that is the interpretation long in use by GCC. */
18521 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
18522 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
18524 struct objfile
*objfile
= cu
->objfile
;
18525 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
18526 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
18527 LONGEST l
= DW_UNSND (attr
);
18529 if (bits
< sizeof (*value
) * 8)
18531 l
&= ((LONGEST
) 1 << bits
) - 1;
18534 else if (bits
== sizeof (*value
) * 8)
18538 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
18539 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
18546 /* Read a constant value from an attribute. Either set *VALUE, or if
18547 the value does not fit in *VALUE, set *BYTES - either already
18548 allocated on the objfile obstack, or newly allocated on OBSTACK,
18549 or, set *BATON, if we translated the constant to a location
18553 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
18554 const char *name
, struct obstack
*obstack
,
18555 struct dwarf2_cu
*cu
,
18556 LONGEST
*value
, const gdb_byte
**bytes
,
18557 struct dwarf2_locexpr_baton
**baton
)
18559 struct objfile
*objfile
= cu
->objfile
;
18560 struct comp_unit_head
*cu_header
= &cu
->header
;
18561 struct dwarf_block
*blk
;
18562 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
18563 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
18569 switch (attr
->form
)
18572 case DW_FORM_GNU_addr_index
:
18576 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
18577 dwarf2_const_value_length_mismatch_complaint (name
,
18578 cu_header
->addr_size
,
18579 TYPE_LENGTH (type
));
18580 /* Symbols of this form are reasonably rare, so we just
18581 piggyback on the existing location code rather than writing
18582 a new implementation of symbol_computed_ops. */
18583 *baton
= obstack_alloc (obstack
, sizeof (struct dwarf2_locexpr_baton
));
18584 (*baton
)->per_cu
= cu
->per_cu
;
18585 gdb_assert ((*baton
)->per_cu
);
18587 (*baton
)->size
= 2 + cu_header
->addr_size
;
18588 data
= obstack_alloc (obstack
, (*baton
)->size
);
18589 (*baton
)->data
= data
;
18591 data
[0] = DW_OP_addr
;
18592 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
18593 byte_order
, DW_ADDR (attr
));
18594 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
18597 case DW_FORM_string
:
18599 case DW_FORM_GNU_str_index
:
18600 case DW_FORM_GNU_strp_alt
:
18601 /* DW_STRING is already allocated on the objfile obstack, point
18603 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18605 case DW_FORM_block1
:
18606 case DW_FORM_block2
:
18607 case DW_FORM_block4
:
18608 case DW_FORM_block
:
18609 case DW_FORM_exprloc
:
18610 blk
= DW_BLOCK (attr
);
18611 if (TYPE_LENGTH (type
) != blk
->size
)
18612 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18613 TYPE_LENGTH (type
));
18614 *bytes
= blk
->data
;
18617 /* The DW_AT_const_value attributes are supposed to carry the
18618 symbol's value "represented as it would be on the target
18619 architecture." By the time we get here, it's already been
18620 converted to host endianness, so we just need to sign- or
18621 zero-extend it as appropriate. */
18622 case DW_FORM_data1
:
18623 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18625 case DW_FORM_data2
:
18626 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18628 case DW_FORM_data4
:
18629 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18631 case DW_FORM_data8
:
18632 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18635 case DW_FORM_sdata
:
18636 *value
= DW_SND (attr
);
18639 case DW_FORM_udata
:
18640 *value
= DW_UNSND (attr
);
18644 complaint (&symfile_complaints
,
18645 _("unsupported const value attribute form: '%s'"),
18646 dwarf_form_name (attr
->form
));
18653 /* Copy constant value from an attribute to a symbol. */
18656 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18657 struct dwarf2_cu
*cu
)
18659 struct objfile
*objfile
= cu
->objfile
;
18660 struct comp_unit_head
*cu_header
= &cu
->header
;
18662 const gdb_byte
*bytes
;
18663 struct dwarf2_locexpr_baton
*baton
;
18665 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18666 SYMBOL_PRINT_NAME (sym
),
18667 &objfile
->objfile_obstack
, cu
,
18668 &value
, &bytes
, &baton
);
18672 SYMBOL_LOCATION_BATON (sym
) = baton
;
18673 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18675 else if (bytes
!= NULL
)
18677 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18678 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18682 SYMBOL_VALUE (sym
) = value
;
18683 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18687 /* Return the type of the die in question using its DW_AT_type attribute. */
18689 static struct type
*
18690 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18692 struct attribute
*type_attr
;
18694 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18697 /* A missing DW_AT_type represents a void type. */
18698 return objfile_type (cu
->objfile
)->builtin_void
;
18701 return lookup_die_type (die
, type_attr
, cu
);
18704 /* True iff CU's producer generates GNAT Ada auxiliary information
18705 that allows to find parallel types through that information instead
18706 of having to do expensive parallel lookups by type name. */
18709 need_gnat_info (struct dwarf2_cu
*cu
)
18711 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18712 of GNAT produces this auxiliary information, without any indication
18713 that it is produced. Part of enhancing the FSF version of GNAT
18714 to produce that information will be to put in place an indicator
18715 that we can use in order to determine whether the descriptive type
18716 info is available or not. One suggestion that has been made is
18717 to use a new attribute, attached to the CU die. For now, assume
18718 that the descriptive type info is not available. */
18722 /* Return the auxiliary type of the die in question using its
18723 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18724 attribute is not present. */
18726 static struct type
*
18727 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18729 struct attribute
*type_attr
;
18731 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18735 return lookup_die_type (die
, type_attr
, cu
);
18738 /* If DIE has a descriptive_type attribute, then set the TYPE's
18739 descriptive type accordingly. */
18742 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18743 struct dwarf2_cu
*cu
)
18745 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18747 if (descriptive_type
)
18749 ALLOCATE_GNAT_AUX_TYPE (type
);
18750 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18754 /* Return the containing type of the die in question using its
18755 DW_AT_containing_type attribute. */
18757 static struct type
*
18758 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18760 struct attribute
*type_attr
;
18762 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
18764 error (_("Dwarf Error: Problem turning containing type into gdb type "
18765 "[in module %s]"), objfile_name (cu
->objfile
));
18767 return lookup_die_type (die
, type_attr
, cu
);
18770 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18772 static struct type
*
18773 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
18775 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18776 char *message
, *saved
;
18778 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18779 objfile_name (objfile
),
18780 cu
->header
.offset
.sect_off
,
18781 die
->offset
.sect_off
);
18782 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
18783 message
, strlen (message
));
18786 return init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
18789 /* Look up the type of DIE in CU using its type attribute ATTR.
18790 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
18791 DW_AT_containing_type.
18792 If there is no type substitute an error marker. */
18794 static struct type
*
18795 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
18796 struct dwarf2_cu
*cu
)
18798 struct objfile
*objfile
= cu
->objfile
;
18799 struct type
*this_type
;
18801 gdb_assert (attr
->name
== DW_AT_type
18802 || attr
->name
== DW_AT_GNAT_descriptive_type
18803 || attr
->name
== DW_AT_containing_type
);
18805 /* First see if we have it cached. */
18807 if (attr
->form
== DW_FORM_GNU_ref_alt
)
18809 struct dwarf2_per_cu_data
*per_cu
;
18810 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18812 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
18813 this_type
= get_die_type_at_offset (offset
, per_cu
);
18815 else if (attr_form_is_ref (attr
))
18817 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18819 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
18821 else if (attr
->form
== DW_FORM_ref_sig8
)
18823 ULONGEST signature
= DW_SIGNATURE (attr
);
18825 return get_signatured_type (die
, signature
, cu
);
18829 complaint (&symfile_complaints
,
18830 _("Dwarf Error: Bad type attribute %s in DIE"
18831 " at 0x%x [in module %s]"),
18832 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
18833 objfile_name (objfile
));
18834 return build_error_marker_type (cu
, die
);
18837 /* If not cached we need to read it in. */
18839 if (this_type
== NULL
)
18841 struct die_info
*type_die
= NULL
;
18842 struct dwarf2_cu
*type_cu
= cu
;
18844 if (attr_form_is_ref (attr
))
18845 type_die
= follow_die_ref (die
, attr
, &type_cu
);
18846 if (type_die
== NULL
)
18847 return build_error_marker_type (cu
, die
);
18848 /* If we find the type now, it's probably because the type came
18849 from an inter-CU reference and the type's CU got expanded before
18851 this_type
= read_type_die (type_die
, type_cu
);
18854 /* If we still don't have a type use an error marker. */
18856 if (this_type
== NULL
)
18857 return build_error_marker_type (cu
, die
);
18862 /* Return the type in DIE, CU.
18863 Returns NULL for invalid types.
18865 This first does a lookup in die_type_hash,
18866 and only reads the die in if necessary.
18868 NOTE: This can be called when reading in partial or full symbols. */
18870 static struct type
*
18871 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
18873 struct type
*this_type
;
18875 this_type
= get_die_type (die
, cu
);
18879 return read_type_die_1 (die
, cu
);
18882 /* Read the type in DIE, CU.
18883 Returns NULL for invalid types. */
18885 static struct type
*
18886 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
18888 struct type
*this_type
= NULL
;
18892 case DW_TAG_class_type
:
18893 case DW_TAG_interface_type
:
18894 case DW_TAG_structure_type
:
18895 case DW_TAG_union_type
:
18896 this_type
= read_structure_type (die
, cu
);
18898 case DW_TAG_enumeration_type
:
18899 this_type
= read_enumeration_type (die
, cu
);
18901 case DW_TAG_subprogram
:
18902 case DW_TAG_subroutine_type
:
18903 case DW_TAG_inlined_subroutine
:
18904 this_type
= read_subroutine_type (die
, cu
);
18906 case DW_TAG_array_type
:
18907 this_type
= read_array_type (die
, cu
);
18909 case DW_TAG_set_type
:
18910 this_type
= read_set_type (die
, cu
);
18912 case DW_TAG_pointer_type
:
18913 this_type
= read_tag_pointer_type (die
, cu
);
18915 case DW_TAG_ptr_to_member_type
:
18916 this_type
= read_tag_ptr_to_member_type (die
, cu
);
18918 case DW_TAG_reference_type
:
18919 this_type
= read_tag_reference_type (die
, cu
);
18921 case DW_TAG_const_type
:
18922 this_type
= read_tag_const_type (die
, cu
);
18924 case DW_TAG_volatile_type
:
18925 this_type
= read_tag_volatile_type (die
, cu
);
18927 case DW_TAG_restrict_type
:
18928 this_type
= read_tag_restrict_type (die
, cu
);
18930 case DW_TAG_string_type
:
18931 this_type
= read_tag_string_type (die
, cu
);
18933 case DW_TAG_typedef
:
18934 this_type
= read_typedef (die
, cu
);
18936 case DW_TAG_subrange_type
:
18937 this_type
= read_subrange_type (die
, cu
);
18939 case DW_TAG_base_type
:
18940 this_type
= read_base_type (die
, cu
);
18942 case DW_TAG_unspecified_type
:
18943 this_type
= read_unspecified_type (die
, cu
);
18945 case DW_TAG_namespace
:
18946 this_type
= read_namespace_type (die
, cu
);
18948 case DW_TAG_module
:
18949 this_type
= read_module_type (die
, cu
);
18951 case DW_TAG_atomic_type
:
18952 this_type
= read_tag_atomic_type (die
, cu
);
18955 complaint (&symfile_complaints
,
18956 _("unexpected tag in read_type_die: '%s'"),
18957 dwarf_tag_name (die
->tag
));
18964 /* See if we can figure out if the class lives in a namespace. We do
18965 this by looking for a member function; its demangled name will
18966 contain namespace info, if there is any.
18967 Return the computed name or NULL.
18968 Space for the result is allocated on the objfile's obstack.
18969 This is the full-die version of guess_partial_die_structure_name.
18970 In this case we know DIE has no useful parent. */
18973 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
18975 struct die_info
*spec_die
;
18976 struct dwarf2_cu
*spec_cu
;
18977 struct die_info
*child
;
18980 spec_die
= die_specification (die
, &spec_cu
);
18981 if (spec_die
!= NULL
)
18987 for (child
= die
->child
;
18989 child
= child
->sibling
)
18991 if (child
->tag
== DW_TAG_subprogram
)
18993 struct attribute
*attr
;
18995 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
18997 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
19001 = language_class_name_from_physname (cu
->language_defn
,
19005 if (actual_name
!= NULL
)
19007 const char *die_name
= dwarf2_name (die
, cu
);
19009 if (die_name
!= NULL
19010 && strcmp (die_name
, actual_name
) != 0)
19012 /* Strip off the class name from the full name.
19013 We want the prefix. */
19014 int die_name_len
= strlen (die_name
);
19015 int actual_name_len
= strlen (actual_name
);
19017 /* Test for '::' as a sanity check. */
19018 if (actual_name_len
> die_name_len
+ 2
19019 && actual_name
[actual_name_len
19020 - die_name_len
- 1] == ':')
19022 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19024 actual_name_len
- die_name_len
- 2);
19027 xfree (actual_name
);
19036 /* GCC might emit a nameless typedef that has a linkage name. Determine the
19037 prefix part in such case. See
19038 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19041 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19043 struct attribute
*attr
;
19046 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
19047 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
19050 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19051 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19054 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19056 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19057 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19060 /* dwarf2_name had to be already called. */
19061 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
19063 /* Strip the base name, keep any leading namespaces/classes. */
19064 base
= strrchr (DW_STRING (attr
), ':');
19065 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
19068 return obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19069 DW_STRING (attr
), &base
[-1] - DW_STRING (attr
));
19072 /* Return the name of the namespace/class that DIE is defined within,
19073 or "" if we can't tell. The caller should not xfree the result.
19075 For example, if we're within the method foo() in the following
19085 then determine_prefix on foo's die will return "N::C". */
19087 static const char *
19088 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19090 struct die_info
*parent
, *spec_die
;
19091 struct dwarf2_cu
*spec_cu
;
19092 struct type
*parent_type
;
19095 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
19096 && cu
->language
!= language_fortran
)
19099 retval
= anonymous_struct_prefix (die
, cu
);
19103 /* We have to be careful in the presence of DW_AT_specification.
19104 For example, with GCC 3.4, given the code
19108 // Definition of N::foo.
19112 then we'll have a tree of DIEs like this:
19114 1: DW_TAG_compile_unit
19115 2: DW_TAG_namespace // N
19116 3: DW_TAG_subprogram // declaration of N::foo
19117 4: DW_TAG_subprogram // definition of N::foo
19118 DW_AT_specification // refers to die #3
19120 Thus, when processing die #4, we have to pretend that we're in
19121 the context of its DW_AT_specification, namely the contex of die
19124 spec_die
= die_specification (die
, &spec_cu
);
19125 if (spec_die
== NULL
)
19126 parent
= die
->parent
;
19129 parent
= spec_die
->parent
;
19133 if (parent
== NULL
)
19135 else if (parent
->building_fullname
)
19138 const char *parent_name
;
19140 /* It has been seen on RealView 2.2 built binaries,
19141 DW_TAG_template_type_param types actually _defined_ as
19142 children of the parent class:
19145 template class <class Enum> Class{};
19146 Class<enum E> class_e;
19148 1: DW_TAG_class_type (Class)
19149 2: DW_TAG_enumeration_type (E)
19150 3: DW_TAG_enumerator (enum1:0)
19151 3: DW_TAG_enumerator (enum2:1)
19153 2: DW_TAG_template_type_param
19154 DW_AT_type DW_FORM_ref_udata (E)
19156 Besides being broken debug info, it can put GDB into an
19157 infinite loop. Consider:
19159 When we're building the full name for Class<E>, we'll start
19160 at Class, and go look over its template type parameters,
19161 finding E. We'll then try to build the full name of E, and
19162 reach here. We're now trying to build the full name of E,
19163 and look over the parent DIE for containing scope. In the
19164 broken case, if we followed the parent DIE of E, we'd again
19165 find Class, and once again go look at its template type
19166 arguments, etc., etc. Simply don't consider such parent die
19167 as source-level parent of this die (it can't be, the language
19168 doesn't allow it), and break the loop here. */
19169 name
= dwarf2_name (die
, cu
);
19170 parent_name
= dwarf2_name (parent
, cu
);
19171 complaint (&symfile_complaints
,
19172 _("template param type '%s' defined within parent '%s'"),
19173 name
? name
: "<unknown>",
19174 parent_name
? parent_name
: "<unknown>");
19178 switch (parent
->tag
)
19180 case DW_TAG_namespace
:
19181 parent_type
= read_type_die (parent
, cu
);
19182 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
19183 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
19184 Work around this problem here. */
19185 if (cu
->language
== language_cplus
19186 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
19188 /* We give a name to even anonymous namespaces. */
19189 return TYPE_TAG_NAME (parent_type
);
19190 case DW_TAG_class_type
:
19191 case DW_TAG_interface_type
:
19192 case DW_TAG_structure_type
:
19193 case DW_TAG_union_type
:
19194 case DW_TAG_module
:
19195 parent_type
= read_type_die (parent
, cu
);
19196 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19197 return TYPE_TAG_NAME (parent_type
);
19199 /* An anonymous structure is only allowed non-static data
19200 members; no typedefs, no member functions, et cetera.
19201 So it does not need a prefix. */
19203 case DW_TAG_compile_unit
:
19204 case DW_TAG_partial_unit
:
19205 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
19206 if (cu
->language
== language_cplus
19207 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
19208 && die
->child
!= NULL
19209 && (die
->tag
== DW_TAG_class_type
19210 || die
->tag
== DW_TAG_structure_type
19211 || die
->tag
== DW_TAG_union_type
))
19213 char *name
= guess_full_die_structure_name (die
, cu
);
19218 case DW_TAG_enumeration_type
:
19219 parent_type
= read_type_die (parent
, cu
);
19220 if (TYPE_DECLARED_CLASS (parent_type
))
19222 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19223 return TYPE_TAG_NAME (parent_type
);
19226 /* Fall through. */
19228 return determine_prefix (parent
, cu
);
19232 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
19233 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
19234 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
19235 an obconcat, otherwise allocate storage for the result. The CU argument is
19236 used to determine the language and hence, the appropriate separator. */
19238 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
19241 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
19242 int physname
, struct dwarf2_cu
*cu
)
19244 const char *lead
= "";
19247 if (suffix
== NULL
|| suffix
[0] == '\0'
19248 || prefix
== NULL
|| prefix
[0] == '\0')
19250 else if (cu
->language
== language_java
)
19252 else if (cu
->language
== language_fortran
&& physname
)
19254 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
19255 DW_AT_MIPS_linkage_name is preferred and used instead. */
19263 if (prefix
== NULL
)
19265 if (suffix
== NULL
)
19271 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
19273 strcpy (retval
, lead
);
19274 strcat (retval
, prefix
);
19275 strcat (retval
, sep
);
19276 strcat (retval
, suffix
);
19281 /* We have an obstack. */
19282 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
19286 /* Return sibling of die, NULL if no sibling. */
19288 static struct die_info
*
19289 sibling_die (struct die_info
*die
)
19291 return die
->sibling
;
19294 /* Get name of a die, return NULL if not found. */
19296 static const char *
19297 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
19298 struct obstack
*obstack
)
19300 if (name
&& cu
->language
== language_cplus
)
19302 char *canon_name
= cp_canonicalize_string (name
);
19304 if (canon_name
!= NULL
)
19306 if (strcmp (canon_name
, name
) != 0)
19307 name
= obstack_copy0 (obstack
, canon_name
, strlen (canon_name
));
19308 xfree (canon_name
);
19315 /* Get name of a die, return NULL if not found.
19316 Anonymous namespaces are converted to their magic string. */
19318 static const char *
19319 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19321 struct attribute
*attr
;
19323 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19324 if ((!attr
|| !DW_STRING (attr
))
19325 && die
->tag
!= DW_TAG_namespace
19326 && die
->tag
!= DW_TAG_class_type
19327 && die
->tag
!= DW_TAG_interface_type
19328 && die
->tag
!= DW_TAG_structure_type
19329 && die
->tag
!= DW_TAG_union_type
)
19334 case DW_TAG_compile_unit
:
19335 case DW_TAG_partial_unit
:
19336 /* Compilation units have a DW_AT_name that is a filename, not
19337 a source language identifier. */
19338 case DW_TAG_enumeration_type
:
19339 case DW_TAG_enumerator
:
19340 /* These tags always have simple identifiers already; no need
19341 to canonicalize them. */
19342 return DW_STRING (attr
);
19344 case DW_TAG_namespace
:
19345 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19346 return DW_STRING (attr
);
19347 return CP_ANONYMOUS_NAMESPACE_STR
;
19349 case DW_TAG_subprogram
:
19350 /* Java constructors will all be named "<init>", so return
19351 the class name when we see this special case. */
19352 if (cu
->language
== language_java
19353 && DW_STRING (attr
) != NULL
19354 && strcmp (DW_STRING (attr
), "<init>") == 0)
19356 struct dwarf2_cu
*spec_cu
= cu
;
19357 struct die_info
*spec_die
;
19359 /* GCJ will output '<init>' for Java constructor names.
19360 For this special case, return the name of the parent class. */
19362 /* GCJ may output subprogram DIEs with AT_specification set.
19363 If so, use the name of the specified DIE. */
19364 spec_die
= die_specification (die
, &spec_cu
);
19365 if (spec_die
!= NULL
)
19366 return dwarf2_name (spec_die
, spec_cu
);
19371 if (die
->tag
== DW_TAG_class_type
)
19372 return dwarf2_name (die
, cu
);
19374 while (die
->tag
!= DW_TAG_compile_unit
19375 && die
->tag
!= DW_TAG_partial_unit
);
19379 case DW_TAG_class_type
:
19380 case DW_TAG_interface_type
:
19381 case DW_TAG_structure_type
:
19382 case DW_TAG_union_type
:
19383 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
19384 structures or unions. These were of the form "._%d" in GCC 4.1,
19385 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
19386 and GCC 4.4. We work around this problem by ignoring these. */
19387 if (attr
&& DW_STRING (attr
)
19388 && (startswith (DW_STRING (attr
), "._")
19389 || startswith (DW_STRING (attr
), "<anonymous")))
19392 /* GCC might emit a nameless typedef that has a linkage name. See
19393 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19394 if (!attr
|| DW_STRING (attr
) == NULL
)
19396 char *demangled
= NULL
;
19398 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19400 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19402 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19405 /* Avoid demangling DW_STRING (attr) the second time on a second
19406 call for the same DIE. */
19407 if (!DW_STRING_IS_CANONICAL (attr
))
19408 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
19414 /* FIXME: we already did this for the partial symbol... */
19416 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19417 demangled
, strlen (demangled
));
19418 DW_STRING_IS_CANONICAL (attr
) = 1;
19421 /* Strip any leading namespaces/classes, keep only the base name.
19422 DW_AT_name for named DIEs does not contain the prefixes. */
19423 base
= strrchr (DW_STRING (attr
), ':');
19424 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
19427 return DW_STRING (attr
);
19436 if (!DW_STRING_IS_CANONICAL (attr
))
19439 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
19440 &cu
->objfile
->per_bfd
->storage_obstack
);
19441 DW_STRING_IS_CANONICAL (attr
) = 1;
19443 return DW_STRING (attr
);
19446 /* Return the die that this die in an extension of, or NULL if there
19447 is none. *EXT_CU is the CU containing DIE on input, and the CU
19448 containing the return value on output. */
19450 static struct die_info
*
19451 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
19453 struct attribute
*attr
;
19455 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
19459 return follow_die_ref (die
, attr
, ext_cu
);
19462 /* Convert a DIE tag into its string name. */
19464 static const char *
19465 dwarf_tag_name (unsigned tag
)
19467 const char *name
= get_DW_TAG_name (tag
);
19470 return "DW_TAG_<unknown>";
19475 /* Convert a DWARF attribute code into its string name. */
19477 static const char *
19478 dwarf_attr_name (unsigned attr
)
19482 #ifdef MIPS /* collides with DW_AT_HP_block_index */
19483 if (attr
== DW_AT_MIPS_fde
)
19484 return "DW_AT_MIPS_fde";
19486 if (attr
== DW_AT_HP_block_index
)
19487 return "DW_AT_HP_block_index";
19490 name
= get_DW_AT_name (attr
);
19493 return "DW_AT_<unknown>";
19498 /* Convert a DWARF value form code into its string name. */
19500 static const char *
19501 dwarf_form_name (unsigned form
)
19503 const char *name
= get_DW_FORM_name (form
);
19506 return "DW_FORM_<unknown>";
19512 dwarf_bool_name (unsigned mybool
)
19520 /* Convert a DWARF type code into its string name. */
19522 static const char *
19523 dwarf_type_encoding_name (unsigned enc
)
19525 const char *name
= get_DW_ATE_name (enc
);
19528 return "DW_ATE_<unknown>";
19534 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
19538 print_spaces (indent
, f
);
19539 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
19540 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
19542 if (die
->parent
!= NULL
)
19544 print_spaces (indent
, f
);
19545 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
19546 die
->parent
->offset
.sect_off
);
19549 print_spaces (indent
, f
);
19550 fprintf_unfiltered (f
, " has children: %s\n",
19551 dwarf_bool_name (die
->child
!= NULL
));
19553 print_spaces (indent
, f
);
19554 fprintf_unfiltered (f
, " attributes:\n");
19556 for (i
= 0; i
< die
->num_attrs
; ++i
)
19558 print_spaces (indent
, f
);
19559 fprintf_unfiltered (f
, " %s (%s) ",
19560 dwarf_attr_name (die
->attrs
[i
].name
),
19561 dwarf_form_name (die
->attrs
[i
].form
));
19563 switch (die
->attrs
[i
].form
)
19566 case DW_FORM_GNU_addr_index
:
19567 fprintf_unfiltered (f
, "address: ");
19568 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
19570 case DW_FORM_block2
:
19571 case DW_FORM_block4
:
19572 case DW_FORM_block
:
19573 case DW_FORM_block1
:
19574 fprintf_unfiltered (f
, "block: size %s",
19575 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19577 case DW_FORM_exprloc
:
19578 fprintf_unfiltered (f
, "expression: size %s",
19579 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19581 case DW_FORM_ref_addr
:
19582 fprintf_unfiltered (f
, "ref address: ");
19583 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19585 case DW_FORM_GNU_ref_alt
:
19586 fprintf_unfiltered (f
, "alt ref address: ");
19587 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19593 case DW_FORM_ref_udata
:
19594 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
19595 (long) (DW_UNSND (&die
->attrs
[i
])));
19597 case DW_FORM_data1
:
19598 case DW_FORM_data2
:
19599 case DW_FORM_data4
:
19600 case DW_FORM_data8
:
19601 case DW_FORM_udata
:
19602 case DW_FORM_sdata
:
19603 fprintf_unfiltered (f
, "constant: %s",
19604 pulongest (DW_UNSND (&die
->attrs
[i
])));
19606 case DW_FORM_sec_offset
:
19607 fprintf_unfiltered (f
, "section offset: %s",
19608 pulongest (DW_UNSND (&die
->attrs
[i
])));
19610 case DW_FORM_ref_sig8
:
19611 fprintf_unfiltered (f
, "signature: %s",
19612 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19614 case DW_FORM_string
:
19616 case DW_FORM_GNU_str_index
:
19617 case DW_FORM_GNU_strp_alt
:
19618 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19619 DW_STRING (&die
->attrs
[i
])
19620 ? DW_STRING (&die
->attrs
[i
]) : "",
19621 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19624 if (DW_UNSND (&die
->attrs
[i
]))
19625 fprintf_unfiltered (f
, "flag: TRUE");
19627 fprintf_unfiltered (f
, "flag: FALSE");
19629 case DW_FORM_flag_present
:
19630 fprintf_unfiltered (f
, "flag: TRUE");
19632 case DW_FORM_indirect
:
19633 /* The reader will have reduced the indirect form to
19634 the "base form" so this form should not occur. */
19635 fprintf_unfiltered (f
,
19636 "unexpected attribute form: DW_FORM_indirect");
19639 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19640 die
->attrs
[i
].form
);
19643 fprintf_unfiltered (f
, "\n");
19648 dump_die_for_error (struct die_info
*die
)
19650 dump_die_shallow (gdb_stderr
, 0, die
);
19654 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19656 int indent
= level
* 4;
19658 gdb_assert (die
!= NULL
);
19660 if (level
>= max_level
)
19663 dump_die_shallow (f
, indent
, die
);
19665 if (die
->child
!= NULL
)
19667 print_spaces (indent
, f
);
19668 fprintf_unfiltered (f
, " Children:");
19669 if (level
+ 1 < max_level
)
19671 fprintf_unfiltered (f
, "\n");
19672 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19676 fprintf_unfiltered (f
,
19677 " [not printed, max nesting level reached]\n");
19681 if (die
->sibling
!= NULL
&& level
> 0)
19683 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19687 /* This is called from the pdie macro in gdbinit.in.
19688 It's not static so gcc will keep a copy callable from gdb. */
19691 dump_die (struct die_info
*die
, int max_level
)
19693 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19697 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19701 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19707 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19711 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19713 sect_offset retval
= { DW_UNSND (attr
) };
19715 if (attr_form_is_ref (attr
))
19718 retval
.sect_off
= 0;
19719 complaint (&symfile_complaints
,
19720 _("unsupported die ref attribute form: '%s'"),
19721 dwarf_form_name (attr
->form
));
19725 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19726 * the value held by the attribute is not constant. */
19729 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19731 if (attr
->form
== DW_FORM_sdata
)
19732 return DW_SND (attr
);
19733 else if (attr
->form
== DW_FORM_udata
19734 || attr
->form
== DW_FORM_data1
19735 || attr
->form
== DW_FORM_data2
19736 || attr
->form
== DW_FORM_data4
19737 || attr
->form
== DW_FORM_data8
)
19738 return DW_UNSND (attr
);
19741 complaint (&symfile_complaints
,
19742 _("Attribute value is not a constant (%s)"),
19743 dwarf_form_name (attr
->form
));
19744 return default_value
;
19748 /* Follow reference or signature attribute ATTR of SRC_DIE.
19749 On entry *REF_CU is the CU of SRC_DIE.
19750 On exit *REF_CU is the CU of the result. */
19752 static struct die_info
*
19753 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19754 struct dwarf2_cu
**ref_cu
)
19756 struct die_info
*die
;
19758 if (attr_form_is_ref (attr
))
19759 die
= follow_die_ref (src_die
, attr
, ref_cu
);
19760 else if (attr
->form
== DW_FORM_ref_sig8
)
19761 die
= follow_die_sig (src_die
, attr
, ref_cu
);
19764 dump_die_for_error (src_die
);
19765 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19766 objfile_name ((*ref_cu
)->objfile
));
19772 /* Follow reference OFFSET.
19773 On entry *REF_CU is the CU of the source die referencing OFFSET.
19774 On exit *REF_CU is the CU of the result.
19775 Returns NULL if OFFSET is invalid. */
19777 static struct die_info
*
19778 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
19779 struct dwarf2_cu
**ref_cu
)
19781 struct die_info temp_die
;
19782 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
19784 gdb_assert (cu
->per_cu
!= NULL
);
19788 if (cu
->per_cu
->is_debug_types
)
19790 /* .debug_types CUs cannot reference anything outside their CU.
19791 If they need to, they have to reference a signatured type via
19792 DW_FORM_ref_sig8. */
19793 if (! offset_in_cu_p (&cu
->header
, offset
))
19796 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
19797 || ! offset_in_cu_p (&cu
->header
, offset
))
19799 struct dwarf2_per_cu_data
*per_cu
;
19801 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
19804 /* If necessary, add it to the queue and load its DIEs. */
19805 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
19806 load_full_comp_unit (per_cu
, cu
->language
);
19808 target_cu
= per_cu
->cu
;
19810 else if (cu
->dies
== NULL
)
19812 /* We're loading full DIEs during partial symbol reading. */
19813 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
19814 load_full_comp_unit (cu
->per_cu
, language_minimal
);
19817 *ref_cu
= target_cu
;
19818 temp_die
.offset
= offset
;
19819 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
19822 /* Follow reference attribute ATTR of SRC_DIE.
19823 On entry *REF_CU is the CU of SRC_DIE.
19824 On exit *REF_CU is the CU of the result. */
19826 static struct die_info
*
19827 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
19828 struct dwarf2_cu
**ref_cu
)
19830 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19831 struct dwarf2_cu
*cu
= *ref_cu
;
19832 struct die_info
*die
;
19834 die
= follow_die_offset (offset
,
19835 (attr
->form
== DW_FORM_GNU_ref_alt
19836 || cu
->per_cu
->is_dwz
),
19839 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
19840 "at 0x%x [in module %s]"),
19841 offset
.sect_off
, src_die
->offset
.sect_off
,
19842 objfile_name (cu
->objfile
));
19847 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
19848 Returned value is intended for DW_OP_call*. Returned
19849 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
19851 struct dwarf2_locexpr_baton
19852 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
19853 struct dwarf2_per_cu_data
*per_cu
,
19854 CORE_ADDR (*get_frame_pc
) (void *baton
),
19857 struct dwarf2_cu
*cu
;
19858 struct die_info
*die
;
19859 struct attribute
*attr
;
19860 struct dwarf2_locexpr_baton retval
;
19862 dw2_setup (per_cu
->objfile
);
19864 if (per_cu
->cu
== NULL
)
19868 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
19870 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
19871 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19873 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
19876 /* DWARF: "If there is no such attribute, then there is no effect.".
19877 DATA is ignored if SIZE is 0. */
19879 retval
.data
= NULL
;
19882 else if (attr_form_is_section_offset (attr
))
19884 struct dwarf2_loclist_baton loclist_baton
;
19885 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
19888 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
19890 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
19892 retval
.size
= size
;
19896 if (!attr_form_is_block (attr
))
19897 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
19898 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
19899 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19901 retval
.data
= DW_BLOCK (attr
)->data
;
19902 retval
.size
= DW_BLOCK (attr
)->size
;
19904 retval
.per_cu
= cu
->per_cu
;
19906 age_cached_comp_units ();
19911 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
19914 struct dwarf2_locexpr_baton
19915 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
19916 struct dwarf2_per_cu_data
*per_cu
,
19917 CORE_ADDR (*get_frame_pc
) (void *baton
),
19920 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
19922 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
19925 /* Write a constant of a given type as target-ordered bytes into
19928 static const gdb_byte
*
19929 write_constant_as_bytes (struct obstack
*obstack
,
19930 enum bfd_endian byte_order
,
19937 *len
= TYPE_LENGTH (type
);
19938 result
= obstack_alloc (obstack
, *len
);
19939 store_unsigned_integer (result
, *len
, byte_order
, value
);
19944 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
19945 pointer to the constant bytes and set LEN to the length of the
19946 data. If memory is needed, allocate it on OBSTACK. If the DIE
19947 does not have a DW_AT_const_value, return NULL. */
19950 dwarf2_fetch_constant_bytes (sect_offset offset
,
19951 struct dwarf2_per_cu_data
*per_cu
,
19952 struct obstack
*obstack
,
19955 struct dwarf2_cu
*cu
;
19956 struct die_info
*die
;
19957 struct attribute
*attr
;
19958 const gdb_byte
*result
= NULL
;
19961 enum bfd_endian byte_order
;
19963 dw2_setup (per_cu
->objfile
);
19965 if (per_cu
->cu
== NULL
)
19969 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
19971 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
19972 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19975 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19979 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
19980 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
19982 switch (attr
->form
)
19985 case DW_FORM_GNU_addr_index
:
19989 *len
= cu
->header
.addr_size
;
19990 tem
= obstack_alloc (obstack
, *len
);
19991 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
19995 case DW_FORM_string
:
19997 case DW_FORM_GNU_str_index
:
19998 case DW_FORM_GNU_strp_alt
:
19999 /* DW_STRING is already allocated on the objfile obstack, point
20001 result
= (const gdb_byte
*) DW_STRING (attr
);
20002 *len
= strlen (DW_STRING (attr
));
20004 case DW_FORM_block1
:
20005 case DW_FORM_block2
:
20006 case DW_FORM_block4
:
20007 case DW_FORM_block
:
20008 case DW_FORM_exprloc
:
20009 result
= DW_BLOCK (attr
)->data
;
20010 *len
= DW_BLOCK (attr
)->size
;
20013 /* The DW_AT_const_value attributes are supposed to carry the
20014 symbol's value "represented as it would be on the target
20015 architecture." By the time we get here, it's already been
20016 converted to host endianness, so we just need to sign- or
20017 zero-extend it as appropriate. */
20018 case DW_FORM_data1
:
20019 type
= die_type (die
, cu
);
20020 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
20021 if (result
== NULL
)
20022 result
= write_constant_as_bytes (obstack
, byte_order
,
20025 case DW_FORM_data2
:
20026 type
= die_type (die
, cu
);
20027 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
20028 if (result
== NULL
)
20029 result
= write_constant_as_bytes (obstack
, byte_order
,
20032 case DW_FORM_data4
:
20033 type
= die_type (die
, cu
);
20034 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
20035 if (result
== NULL
)
20036 result
= write_constant_as_bytes (obstack
, byte_order
,
20039 case DW_FORM_data8
:
20040 type
= die_type (die
, cu
);
20041 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
20042 if (result
== NULL
)
20043 result
= write_constant_as_bytes (obstack
, byte_order
,
20047 case DW_FORM_sdata
:
20048 type
= die_type (die
, cu
);
20049 result
= write_constant_as_bytes (obstack
, byte_order
,
20050 type
, DW_SND (attr
), len
);
20053 case DW_FORM_udata
:
20054 type
= die_type (die
, cu
);
20055 result
= write_constant_as_bytes (obstack
, byte_order
,
20056 type
, DW_UNSND (attr
), len
);
20060 complaint (&symfile_complaints
,
20061 _("unsupported const value attribute form: '%s'"),
20062 dwarf_form_name (attr
->form
));
20069 /* Return the type of the DIE at DIE_OFFSET in the CU named by
20073 dwarf2_get_die_type (cu_offset die_offset
,
20074 struct dwarf2_per_cu_data
*per_cu
)
20076 sect_offset die_offset_sect
;
20078 dw2_setup (per_cu
->objfile
);
20080 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
20081 return get_die_type_at_offset (die_offset_sect
, per_cu
);
20084 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
20085 On entry *REF_CU is the CU of SRC_DIE.
20086 On exit *REF_CU is the CU of the result.
20087 Returns NULL if the referenced DIE isn't found. */
20089 static struct die_info
*
20090 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
20091 struct dwarf2_cu
**ref_cu
)
20093 struct objfile
*objfile
= (*ref_cu
)->objfile
;
20094 struct die_info temp_die
;
20095 struct dwarf2_cu
*sig_cu
;
20096 struct die_info
*die
;
20098 /* While it might be nice to assert sig_type->type == NULL here,
20099 we can get here for DW_AT_imported_declaration where we need
20100 the DIE not the type. */
20102 /* If necessary, add it to the queue and load its DIEs. */
20104 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
20105 read_signatured_type (sig_type
);
20107 sig_cu
= sig_type
->per_cu
.cu
;
20108 gdb_assert (sig_cu
!= NULL
);
20109 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
20110 temp_die
.offset
= sig_type
->type_offset_in_section
;
20111 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
20112 temp_die
.offset
.sect_off
);
20115 /* For .gdb_index version 7 keep track of included TUs.
20116 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
20117 if (dwarf2_per_objfile
->index_table
!= NULL
20118 && dwarf2_per_objfile
->index_table
->version
<= 7)
20120 VEC_safe_push (dwarf2_per_cu_ptr
,
20121 (*ref_cu
)->per_cu
->imported_symtabs
,
20132 /* Follow signatured type referenced by ATTR in SRC_DIE.
20133 On entry *REF_CU is the CU of SRC_DIE.
20134 On exit *REF_CU is the CU of the result.
20135 The result is the DIE of the type.
20136 If the referenced type cannot be found an error is thrown. */
20138 static struct die_info
*
20139 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20140 struct dwarf2_cu
**ref_cu
)
20142 ULONGEST signature
= DW_SIGNATURE (attr
);
20143 struct signatured_type
*sig_type
;
20144 struct die_info
*die
;
20146 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
20148 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
20149 /* sig_type will be NULL if the signatured type is missing from
20151 if (sig_type
== NULL
)
20153 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
20154 " from DIE at 0x%x [in module %s]"),
20155 hex_string (signature
), src_die
->offset
.sect_off
,
20156 objfile_name ((*ref_cu
)->objfile
));
20159 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
20162 dump_die_for_error (src_die
);
20163 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
20164 " from DIE at 0x%x [in module %s]"),
20165 hex_string (signature
), src_die
->offset
.sect_off
,
20166 objfile_name ((*ref_cu
)->objfile
));
20172 /* Get the type specified by SIGNATURE referenced in DIE/CU,
20173 reading in and processing the type unit if necessary. */
20175 static struct type
*
20176 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
20177 struct dwarf2_cu
*cu
)
20179 struct signatured_type
*sig_type
;
20180 struct dwarf2_cu
*type_cu
;
20181 struct die_info
*type_die
;
20184 sig_type
= lookup_signatured_type (cu
, signature
);
20185 /* sig_type will be NULL if the signatured type is missing from
20187 if (sig_type
== NULL
)
20189 complaint (&symfile_complaints
,
20190 _("Dwarf Error: Cannot find signatured DIE %s referenced"
20191 " from DIE at 0x%x [in module %s]"),
20192 hex_string (signature
), die
->offset
.sect_off
,
20193 objfile_name (dwarf2_per_objfile
->objfile
));
20194 return build_error_marker_type (cu
, die
);
20197 /* If we already know the type we're done. */
20198 if (sig_type
->type
!= NULL
)
20199 return sig_type
->type
;
20202 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
20203 if (type_die
!= NULL
)
20205 /* N.B. We need to call get_die_type to ensure only one type for this DIE
20206 is created. This is important, for example, because for c++ classes
20207 we need TYPE_NAME set which is only done by new_symbol. Blech. */
20208 type
= read_type_die (type_die
, type_cu
);
20211 complaint (&symfile_complaints
,
20212 _("Dwarf Error: Cannot build signatured type %s"
20213 " referenced from DIE at 0x%x [in module %s]"),
20214 hex_string (signature
), die
->offset
.sect_off
,
20215 objfile_name (dwarf2_per_objfile
->objfile
));
20216 type
= build_error_marker_type (cu
, die
);
20221 complaint (&symfile_complaints
,
20222 _("Dwarf Error: Problem reading signatured DIE %s referenced"
20223 " from DIE at 0x%x [in module %s]"),
20224 hex_string (signature
), die
->offset
.sect_off
,
20225 objfile_name (dwarf2_per_objfile
->objfile
));
20226 type
= build_error_marker_type (cu
, die
);
20228 sig_type
->type
= type
;
20233 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
20234 reading in and processing the type unit if necessary. */
20236 static struct type
*
20237 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
20238 struct dwarf2_cu
*cu
) /* ARI: editCase function */
20240 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
20241 if (attr_form_is_ref (attr
))
20243 struct dwarf2_cu
*type_cu
= cu
;
20244 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
20246 return read_type_die (type_die
, type_cu
);
20248 else if (attr
->form
== DW_FORM_ref_sig8
)
20250 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
20254 complaint (&symfile_complaints
,
20255 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
20256 " at 0x%x [in module %s]"),
20257 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
20258 objfile_name (dwarf2_per_objfile
->objfile
));
20259 return build_error_marker_type (cu
, die
);
20263 /* Load the DIEs associated with type unit PER_CU into memory. */
20266 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
20268 struct signatured_type
*sig_type
;
20270 /* Caller is responsible for ensuring type_unit_groups don't get here. */
20271 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
20273 /* We have the per_cu, but we need the signatured_type.
20274 Fortunately this is an easy translation. */
20275 gdb_assert (per_cu
->is_debug_types
);
20276 sig_type
= (struct signatured_type
*) per_cu
;
20278 gdb_assert (per_cu
->cu
== NULL
);
20280 read_signatured_type (sig_type
);
20282 gdb_assert (per_cu
->cu
!= NULL
);
20285 /* die_reader_func for read_signatured_type.
20286 This is identical to load_full_comp_unit_reader,
20287 but is kept separate for now. */
20290 read_signatured_type_reader (const struct die_reader_specs
*reader
,
20291 const gdb_byte
*info_ptr
,
20292 struct die_info
*comp_unit_die
,
20296 struct dwarf2_cu
*cu
= reader
->cu
;
20298 gdb_assert (cu
->die_hash
== NULL
);
20300 htab_create_alloc_ex (cu
->header
.length
/ 12,
20304 &cu
->comp_unit_obstack
,
20305 hashtab_obstack_allocate
,
20306 dummy_obstack_deallocate
);
20309 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
20310 &info_ptr
, comp_unit_die
);
20311 cu
->dies
= comp_unit_die
;
20312 /* comp_unit_die is not stored in die_hash, no need. */
20314 /* We try not to read any attributes in this function, because not
20315 all CUs needed for references have been loaded yet, and symbol
20316 table processing isn't initialized. But we have to set the CU language,
20317 or we won't be able to build types correctly.
20318 Similarly, if we do not read the producer, we can not apply
20319 producer-specific interpretation. */
20320 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
20323 /* Read in a signatured type and build its CU and DIEs.
20324 If the type is a stub for the real type in a DWO file,
20325 read in the real type from the DWO file as well. */
20328 read_signatured_type (struct signatured_type
*sig_type
)
20330 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
20332 gdb_assert (per_cu
->is_debug_types
);
20333 gdb_assert (per_cu
->cu
== NULL
);
20335 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
20336 read_signatured_type_reader
, NULL
);
20337 sig_type
->per_cu
.tu_read
= 1;
20340 /* Decode simple location descriptions.
20341 Given a pointer to a dwarf block that defines a location, compute
20342 the location and return the value.
20344 NOTE drow/2003-11-18: This function is called in two situations
20345 now: for the address of static or global variables (partial symbols
20346 only) and for offsets into structures which are expected to be
20347 (more or less) constant. The partial symbol case should go away,
20348 and only the constant case should remain. That will let this
20349 function complain more accurately. A few special modes are allowed
20350 without complaint for global variables (for instance, global
20351 register values and thread-local values).
20353 A location description containing no operations indicates that the
20354 object is optimized out. The return value is 0 for that case.
20355 FIXME drow/2003-11-16: No callers check for this case any more; soon all
20356 callers will only want a very basic result and this can become a
20359 Note that stack[0] is unused except as a default error return. */
20362 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
20364 struct objfile
*objfile
= cu
->objfile
;
20366 size_t size
= blk
->size
;
20367 const gdb_byte
*data
= blk
->data
;
20368 CORE_ADDR stack
[64];
20370 unsigned int bytes_read
, unsnd
;
20376 stack
[++stacki
] = 0;
20415 stack
[++stacki
] = op
- DW_OP_lit0
;
20450 stack
[++stacki
] = op
- DW_OP_reg0
;
20452 dwarf2_complex_location_expr_complaint ();
20456 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
20458 stack
[++stacki
] = unsnd
;
20460 dwarf2_complex_location_expr_complaint ();
20464 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
20469 case DW_OP_const1u
:
20470 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
20474 case DW_OP_const1s
:
20475 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
20479 case DW_OP_const2u
:
20480 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
20484 case DW_OP_const2s
:
20485 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
20489 case DW_OP_const4u
:
20490 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
20494 case DW_OP_const4s
:
20495 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
20499 case DW_OP_const8u
:
20500 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
20505 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
20511 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
20516 stack
[stacki
+ 1] = stack
[stacki
];
20521 stack
[stacki
- 1] += stack
[stacki
];
20525 case DW_OP_plus_uconst
:
20526 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
20532 stack
[stacki
- 1] -= stack
[stacki
];
20537 /* If we're not the last op, then we definitely can't encode
20538 this using GDB's address_class enum. This is valid for partial
20539 global symbols, although the variable's address will be bogus
20542 dwarf2_complex_location_expr_complaint ();
20545 case DW_OP_GNU_push_tls_address
:
20546 /* The top of the stack has the offset from the beginning
20547 of the thread control block at which the variable is located. */
20548 /* Nothing should follow this operator, so the top of stack would
20550 /* This is valid for partial global symbols, but the variable's
20551 address will be bogus in the psymtab. Make it always at least
20552 non-zero to not look as a variable garbage collected by linker
20553 which have DW_OP_addr 0. */
20555 dwarf2_complex_location_expr_complaint ();
20559 case DW_OP_GNU_uninit
:
20562 case DW_OP_GNU_addr_index
:
20563 case DW_OP_GNU_const_index
:
20564 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
20571 const char *name
= get_DW_OP_name (op
);
20574 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
20577 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
20581 return (stack
[stacki
]);
20584 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20585 outside of the allocated space. Also enforce minimum>0. */
20586 if (stacki
>= ARRAY_SIZE (stack
) - 1)
20588 complaint (&symfile_complaints
,
20589 _("location description stack overflow"));
20595 complaint (&symfile_complaints
,
20596 _("location description stack underflow"));
20600 return (stack
[stacki
]);
20603 /* memory allocation interface */
20605 static struct dwarf_block
*
20606 dwarf_alloc_block (struct dwarf2_cu
*cu
)
20608 struct dwarf_block
*blk
;
20610 blk
= (struct dwarf_block
*)
20611 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
20615 static struct die_info
*
20616 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20618 struct die_info
*die
;
20619 size_t size
= sizeof (struct die_info
);
20622 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20624 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20625 memset (die
, 0, sizeof (struct die_info
));
20630 /* Macro support. */
20632 /* Return file name relative to the compilation directory of file number I in
20633 *LH's file name table. The result is allocated using xmalloc; the caller is
20634 responsible for freeing it. */
20637 file_file_name (int file
, struct line_header
*lh
)
20639 /* Is the file number a valid index into the line header's file name
20640 table? Remember that file numbers start with one, not zero. */
20641 if (1 <= file
&& file
<= lh
->num_file_names
)
20643 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20645 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0
20646 || lh
->include_dirs
== NULL
)
20647 return xstrdup (fe
->name
);
20648 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20653 /* The compiler produced a bogus file number. We can at least
20654 record the macro definitions made in the file, even if we
20655 won't be able to find the file by name. */
20656 char fake_name
[80];
20658 xsnprintf (fake_name
, sizeof (fake_name
),
20659 "<bad macro file number %d>", file
);
20661 complaint (&symfile_complaints
,
20662 _("bad file number in macro information (%d)"),
20665 return xstrdup (fake_name
);
20669 /* Return the full name of file number I in *LH's file name table.
20670 Use COMP_DIR as the name of the current directory of the
20671 compilation. The result is allocated using xmalloc; the caller is
20672 responsible for freeing it. */
20674 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20676 /* Is the file number a valid index into the line header's file name
20677 table? Remember that file numbers start with one, not zero. */
20678 if (1 <= file
&& file
<= lh
->num_file_names
)
20680 char *relative
= file_file_name (file
, lh
);
20682 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20684 return reconcat (relative
, comp_dir
, SLASH_STRING
, relative
, NULL
);
20687 return file_file_name (file
, lh
);
20691 static struct macro_source_file
*
20692 macro_start_file (int file
, int line
,
20693 struct macro_source_file
*current_file
,
20694 struct line_header
*lh
)
20696 /* File name relative to the compilation directory of this source file. */
20697 char *file_name
= file_file_name (file
, lh
);
20699 if (! current_file
)
20701 /* Note: We don't create a macro table for this compilation unit
20702 at all until we actually get a filename. */
20703 struct macro_table
*macro_table
= get_macro_table ();
20705 /* If we have no current file, then this must be the start_file
20706 directive for the compilation unit's main source file. */
20707 current_file
= macro_set_main (macro_table
, file_name
);
20708 macro_define_special (macro_table
);
20711 current_file
= macro_include (current_file
, line
, file_name
);
20715 return current_file
;
20719 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20720 followed by a null byte. */
20722 copy_string (const char *buf
, int len
)
20724 char *s
= xmalloc (len
+ 1);
20726 memcpy (s
, buf
, len
);
20732 static const char *
20733 consume_improper_spaces (const char *p
, const char *body
)
20737 complaint (&symfile_complaints
,
20738 _("macro definition contains spaces "
20739 "in formal argument list:\n`%s'"),
20751 parse_macro_definition (struct macro_source_file
*file
, int line
,
20756 /* The body string takes one of two forms. For object-like macro
20757 definitions, it should be:
20759 <macro name> " " <definition>
20761 For function-like macro definitions, it should be:
20763 <macro name> "() " <definition>
20765 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
20767 Spaces may appear only where explicitly indicated, and in the
20770 The Dwarf 2 spec says that an object-like macro's name is always
20771 followed by a space, but versions of GCC around March 2002 omit
20772 the space when the macro's definition is the empty string.
20774 The Dwarf 2 spec says that there should be no spaces between the
20775 formal arguments in a function-like macro's formal argument list,
20776 but versions of GCC around March 2002 include spaces after the
20780 /* Find the extent of the macro name. The macro name is terminated
20781 by either a space or null character (for an object-like macro) or
20782 an opening paren (for a function-like macro). */
20783 for (p
= body
; *p
; p
++)
20784 if (*p
== ' ' || *p
== '(')
20787 if (*p
== ' ' || *p
== '\0')
20789 /* It's an object-like macro. */
20790 int name_len
= p
- body
;
20791 char *name
= copy_string (body
, name_len
);
20792 const char *replacement
;
20795 replacement
= body
+ name_len
+ 1;
20798 dwarf2_macro_malformed_definition_complaint (body
);
20799 replacement
= body
+ name_len
;
20802 macro_define_object (file
, line
, name
, replacement
);
20806 else if (*p
== '(')
20808 /* It's a function-like macro. */
20809 char *name
= copy_string (body
, p
- body
);
20812 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
20816 p
= consume_improper_spaces (p
, body
);
20818 /* Parse the formal argument list. */
20819 while (*p
&& *p
!= ')')
20821 /* Find the extent of the current argument name. */
20822 const char *arg_start
= p
;
20824 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
20827 if (! *p
|| p
== arg_start
)
20828 dwarf2_macro_malformed_definition_complaint (body
);
20831 /* Make sure argv has room for the new argument. */
20832 if (argc
>= argv_size
)
20835 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
20838 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
20841 p
= consume_improper_spaces (p
, body
);
20843 /* Consume the comma, if present. */
20848 p
= consume_improper_spaces (p
, body
);
20857 /* Perfectly formed definition, no complaints. */
20858 macro_define_function (file
, line
, name
,
20859 argc
, (const char **) argv
,
20861 else if (*p
== '\0')
20863 /* Complain, but do define it. */
20864 dwarf2_macro_malformed_definition_complaint (body
);
20865 macro_define_function (file
, line
, name
,
20866 argc
, (const char **) argv
,
20870 /* Just complain. */
20871 dwarf2_macro_malformed_definition_complaint (body
);
20874 /* Just complain. */
20875 dwarf2_macro_malformed_definition_complaint (body
);
20881 for (i
= 0; i
< argc
; i
++)
20887 dwarf2_macro_malformed_definition_complaint (body
);
20890 /* Skip some bytes from BYTES according to the form given in FORM.
20891 Returns the new pointer. */
20893 static const gdb_byte
*
20894 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
20895 enum dwarf_form form
,
20896 unsigned int offset_size
,
20897 struct dwarf2_section_info
*section
)
20899 unsigned int bytes_read
;
20903 case DW_FORM_data1
:
20908 case DW_FORM_data2
:
20912 case DW_FORM_data4
:
20916 case DW_FORM_data8
:
20920 case DW_FORM_string
:
20921 read_direct_string (abfd
, bytes
, &bytes_read
);
20922 bytes
+= bytes_read
;
20925 case DW_FORM_sec_offset
:
20927 case DW_FORM_GNU_strp_alt
:
20928 bytes
+= offset_size
;
20931 case DW_FORM_block
:
20932 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
20933 bytes
+= bytes_read
;
20936 case DW_FORM_block1
:
20937 bytes
+= 1 + read_1_byte (abfd
, bytes
);
20939 case DW_FORM_block2
:
20940 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
20942 case DW_FORM_block4
:
20943 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
20946 case DW_FORM_sdata
:
20947 case DW_FORM_udata
:
20948 case DW_FORM_GNU_addr_index
:
20949 case DW_FORM_GNU_str_index
:
20950 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
20953 dwarf2_section_buffer_overflow_complaint (section
);
20961 complaint (&symfile_complaints
,
20962 _("invalid form 0x%x in `%s'"),
20963 form
, get_section_name (section
));
20971 /* A helper for dwarf_decode_macros that handles skipping an unknown
20972 opcode. Returns an updated pointer to the macro data buffer; or,
20973 on error, issues a complaint and returns NULL. */
20975 static const gdb_byte
*
20976 skip_unknown_opcode (unsigned int opcode
,
20977 const gdb_byte
**opcode_definitions
,
20978 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
20980 unsigned int offset_size
,
20981 struct dwarf2_section_info
*section
)
20983 unsigned int bytes_read
, i
;
20985 const gdb_byte
*defn
;
20987 if (opcode_definitions
[opcode
] == NULL
)
20989 complaint (&symfile_complaints
,
20990 _("unrecognized DW_MACFINO opcode 0x%x"),
20995 defn
= opcode_definitions
[opcode
];
20996 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
20997 defn
+= bytes_read
;
20999 for (i
= 0; i
< arg
; ++i
)
21001 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
21003 if (mac_ptr
== NULL
)
21005 /* skip_form_bytes already issued the complaint. */
21013 /* A helper function which parses the header of a macro section.
21014 If the macro section is the extended (for now called "GNU") type,
21015 then this updates *OFFSET_SIZE. Returns a pointer to just after
21016 the header, or issues a complaint and returns NULL on error. */
21018 static const gdb_byte
*
21019 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
21021 const gdb_byte
*mac_ptr
,
21022 unsigned int *offset_size
,
21023 int section_is_gnu
)
21025 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
21027 if (section_is_gnu
)
21029 unsigned int version
, flags
;
21031 version
= read_2_bytes (abfd
, mac_ptr
);
21034 complaint (&symfile_complaints
,
21035 _("unrecognized version `%d' in .debug_macro section"),
21041 flags
= read_1_byte (abfd
, mac_ptr
);
21043 *offset_size
= (flags
& 1) ? 8 : 4;
21045 if ((flags
& 2) != 0)
21046 /* We don't need the line table offset. */
21047 mac_ptr
+= *offset_size
;
21049 /* Vendor opcode descriptions. */
21050 if ((flags
& 4) != 0)
21052 unsigned int i
, count
;
21054 count
= read_1_byte (abfd
, mac_ptr
);
21056 for (i
= 0; i
< count
; ++i
)
21058 unsigned int opcode
, bytes_read
;
21061 opcode
= read_1_byte (abfd
, mac_ptr
);
21063 opcode_definitions
[opcode
] = mac_ptr
;
21064 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21065 mac_ptr
+= bytes_read
;
21074 /* A helper for dwarf_decode_macros that handles the GNU extensions,
21075 including DW_MACRO_GNU_transparent_include. */
21078 dwarf_decode_macro_bytes (bfd
*abfd
,
21079 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21080 struct macro_source_file
*current_file
,
21081 struct line_header
*lh
,
21082 struct dwarf2_section_info
*section
,
21083 int section_is_gnu
, int section_is_dwz
,
21084 unsigned int offset_size
,
21085 htab_t include_hash
)
21087 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21088 enum dwarf_macro_record_type macinfo_type
;
21089 int at_commandline
;
21090 const gdb_byte
*opcode_definitions
[256];
21092 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21093 &offset_size
, section_is_gnu
);
21094 if (mac_ptr
== NULL
)
21096 /* We already issued a complaint. */
21100 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
21101 GDB is still reading the definitions from command line. First
21102 DW_MACINFO_start_file will need to be ignored as it was already executed
21103 to create CURRENT_FILE for the main source holding also the command line
21104 definitions. On first met DW_MACINFO_start_file this flag is reset to
21105 normally execute all the remaining DW_MACINFO_start_file macinfos. */
21107 at_commandline
= 1;
21111 /* Do we at least have room for a macinfo type byte? */
21112 if (mac_ptr
>= mac_end
)
21114 dwarf2_section_buffer_overflow_complaint (section
);
21118 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
21121 /* Note that we rely on the fact that the corresponding GNU and
21122 DWARF constants are the same. */
21123 switch (macinfo_type
)
21125 /* A zero macinfo type indicates the end of the macro
21130 case DW_MACRO_GNU_define
:
21131 case DW_MACRO_GNU_undef
:
21132 case DW_MACRO_GNU_define_indirect
:
21133 case DW_MACRO_GNU_undef_indirect
:
21134 case DW_MACRO_GNU_define_indirect_alt
:
21135 case DW_MACRO_GNU_undef_indirect_alt
:
21137 unsigned int bytes_read
;
21142 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21143 mac_ptr
+= bytes_read
;
21145 if (macinfo_type
== DW_MACRO_GNU_define
21146 || macinfo_type
== DW_MACRO_GNU_undef
)
21148 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21149 mac_ptr
+= bytes_read
;
21153 LONGEST str_offset
;
21155 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21156 mac_ptr
+= offset_size
;
21158 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
21159 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
21162 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21164 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
21167 body
= read_indirect_string_at_offset (abfd
, str_offset
);
21170 is_define
= (macinfo_type
== DW_MACRO_GNU_define
21171 || macinfo_type
== DW_MACRO_GNU_define_indirect
21172 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
21173 if (! current_file
)
21175 /* DWARF violation as no main source is present. */
21176 complaint (&symfile_complaints
,
21177 _("debug info with no main source gives macro %s "
21179 is_define
? _("definition") : _("undefinition"),
21183 if ((line
== 0 && !at_commandline
)
21184 || (line
!= 0 && at_commandline
))
21185 complaint (&symfile_complaints
,
21186 _("debug info gives %s macro %s with %s line %d: %s"),
21187 at_commandline
? _("command-line") : _("in-file"),
21188 is_define
? _("definition") : _("undefinition"),
21189 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
21192 parse_macro_definition (current_file
, line
, body
);
21195 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
21196 || macinfo_type
== DW_MACRO_GNU_undef_indirect
21197 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
21198 macro_undef (current_file
, line
, body
);
21203 case DW_MACRO_GNU_start_file
:
21205 unsigned int bytes_read
;
21208 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21209 mac_ptr
+= bytes_read
;
21210 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21211 mac_ptr
+= bytes_read
;
21213 if ((line
== 0 && !at_commandline
)
21214 || (line
!= 0 && at_commandline
))
21215 complaint (&symfile_complaints
,
21216 _("debug info gives source %d included "
21217 "from %s at %s line %d"),
21218 file
, at_commandline
? _("command-line") : _("file"),
21219 line
== 0 ? _("zero") : _("non-zero"), line
);
21221 if (at_commandline
)
21223 /* This DW_MACRO_GNU_start_file was executed in the
21225 at_commandline
= 0;
21228 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21232 case DW_MACRO_GNU_end_file
:
21233 if (! current_file
)
21234 complaint (&symfile_complaints
,
21235 _("macro debug info has an unmatched "
21236 "`close_file' directive"));
21239 current_file
= current_file
->included_by
;
21240 if (! current_file
)
21242 enum dwarf_macro_record_type next_type
;
21244 /* GCC circa March 2002 doesn't produce the zero
21245 type byte marking the end of the compilation
21246 unit. Complain if it's not there, but exit no
21249 /* Do we at least have room for a macinfo type byte? */
21250 if (mac_ptr
>= mac_end
)
21252 dwarf2_section_buffer_overflow_complaint (section
);
21256 /* We don't increment mac_ptr here, so this is just
21258 next_type
= read_1_byte (abfd
, mac_ptr
);
21259 if (next_type
!= 0)
21260 complaint (&symfile_complaints
,
21261 _("no terminating 0-type entry for "
21262 "macros in `.debug_macinfo' section"));
21269 case DW_MACRO_GNU_transparent_include
:
21270 case DW_MACRO_GNU_transparent_include_alt
:
21274 bfd
*include_bfd
= abfd
;
21275 struct dwarf2_section_info
*include_section
= section
;
21276 struct dwarf2_section_info alt_section
;
21277 const gdb_byte
*include_mac_end
= mac_end
;
21278 int is_dwz
= section_is_dwz
;
21279 const gdb_byte
*new_mac_ptr
;
21281 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21282 mac_ptr
+= offset_size
;
21284 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
21286 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21288 dwarf2_read_section (objfile
, &dwz
->macro
);
21290 include_section
= &dwz
->macro
;
21291 include_bfd
= get_section_bfd_owner (include_section
);
21292 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
21296 new_mac_ptr
= include_section
->buffer
+ offset
;
21297 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
21301 /* This has actually happened; see
21302 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
21303 complaint (&symfile_complaints
,
21304 _("recursive DW_MACRO_GNU_transparent_include in "
21305 ".debug_macro section"));
21309 *slot
= (void *) new_mac_ptr
;
21311 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
21312 include_mac_end
, current_file
, lh
,
21313 section
, section_is_gnu
, is_dwz
,
21314 offset_size
, include_hash
);
21316 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
21321 case DW_MACINFO_vendor_ext
:
21322 if (!section_is_gnu
)
21324 unsigned int bytes_read
;
21327 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21328 mac_ptr
+= bytes_read
;
21329 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21330 mac_ptr
+= bytes_read
;
21332 /* We don't recognize any vendor extensions. */
21338 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21339 mac_ptr
, mac_end
, abfd
, offset_size
,
21341 if (mac_ptr
== NULL
)
21345 } while (macinfo_type
!= 0);
21349 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
21350 int section_is_gnu
)
21352 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21353 struct line_header
*lh
= cu
->line_header
;
21355 const gdb_byte
*mac_ptr
, *mac_end
;
21356 struct macro_source_file
*current_file
= 0;
21357 enum dwarf_macro_record_type macinfo_type
;
21358 unsigned int offset_size
= cu
->header
.offset_size
;
21359 const gdb_byte
*opcode_definitions
[256];
21360 struct cleanup
*cleanup
;
21361 htab_t include_hash
;
21363 struct dwarf2_section_info
*section
;
21364 const char *section_name
;
21366 if (cu
->dwo_unit
!= NULL
)
21368 if (section_is_gnu
)
21370 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
21371 section_name
= ".debug_macro.dwo";
21375 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
21376 section_name
= ".debug_macinfo.dwo";
21381 if (section_is_gnu
)
21383 section
= &dwarf2_per_objfile
->macro
;
21384 section_name
= ".debug_macro";
21388 section
= &dwarf2_per_objfile
->macinfo
;
21389 section_name
= ".debug_macinfo";
21393 dwarf2_read_section (objfile
, section
);
21394 if (section
->buffer
== NULL
)
21396 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
21399 abfd
= get_section_bfd_owner (section
);
21401 /* First pass: Find the name of the base filename.
21402 This filename is needed in order to process all macros whose definition
21403 (or undefinition) comes from the command line. These macros are defined
21404 before the first DW_MACINFO_start_file entry, and yet still need to be
21405 associated to the base file.
21407 To determine the base file name, we scan the macro definitions until we
21408 reach the first DW_MACINFO_start_file entry. We then initialize
21409 CURRENT_FILE accordingly so that any macro definition found before the
21410 first DW_MACINFO_start_file can still be associated to the base file. */
21412 mac_ptr
= section
->buffer
+ offset
;
21413 mac_end
= section
->buffer
+ section
->size
;
21415 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21416 &offset_size
, section_is_gnu
);
21417 if (mac_ptr
== NULL
)
21419 /* We already issued a complaint. */
21425 /* Do we at least have room for a macinfo type byte? */
21426 if (mac_ptr
>= mac_end
)
21428 /* Complaint is printed during the second pass as GDB will probably
21429 stop the first pass earlier upon finding
21430 DW_MACINFO_start_file. */
21434 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
21437 /* Note that we rely on the fact that the corresponding GNU and
21438 DWARF constants are the same. */
21439 switch (macinfo_type
)
21441 /* A zero macinfo type indicates the end of the macro
21446 case DW_MACRO_GNU_define
:
21447 case DW_MACRO_GNU_undef
:
21448 /* Only skip the data by MAC_PTR. */
21450 unsigned int bytes_read
;
21452 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21453 mac_ptr
+= bytes_read
;
21454 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21455 mac_ptr
+= bytes_read
;
21459 case DW_MACRO_GNU_start_file
:
21461 unsigned int bytes_read
;
21464 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21465 mac_ptr
+= bytes_read
;
21466 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21467 mac_ptr
+= bytes_read
;
21469 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21473 case DW_MACRO_GNU_end_file
:
21474 /* No data to skip by MAC_PTR. */
21477 case DW_MACRO_GNU_define_indirect
:
21478 case DW_MACRO_GNU_undef_indirect
:
21479 case DW_MACRO_GNU_define_indirect_alt
:
21480 case DW_MACRO_GNU_undef_indirect_alt
:
21482 unsigned int bytes_read
;
21484 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21485 mac_ptr
+= bytes_read
;
21486 mac_ptr
+= offset_size
;
21490 case DW_MACRO_GNU_transparent_include
:
21491 case DW_MACRO_GNU_transparent_include_alt
:
21492 /* Note that, according to the spec, a transparent include
21493 chain cannot call DW_MACRO_GNU_start_file. So, we can just
21494 skip this opcode. */
21495 mac_ptr
+= offset_size
;
21498 case DW_MACINFO_vendor_ext
:
21499 /* Only skip the data by MAC_PTR. */
21500 if (!section_is_gnu
)
21502 unsigned int bytes_read
;
21504 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21505 mac_ptr
+= bytes_read
;
21506 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21507 mac_ptr
+= bytes_read
;
21512 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21513 mac_ptr
, mac_end
, abfd
, offset_size
,
21515 if (mac_ptr
== NULL
)
21519 } while (macinfo_type
!= 0 && current_file
== NULL
);
21521 /* Second pass: Process all entries.
21523 Use the AT_COMMAND_LINE flag to determine whether we are still processing
21524 command-line macro definitions/undefinitions. This flag is unset when we
21525 reach the first DW_MACINFO_start_file entry. */
21527 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
21528 NULL
, xcalloc
, xfree
);
21529 cleanup
= make_cleanup_htab_delete (include_hash
);
21530 mac_ptr
= section
->buffer
+ offset
;
21531 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
21532 *slot
= (void *) mac_ptr
;
21533 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
21534 current_file
, lh
, section
,
21535 section_is_gnu
, 0, offset_size
, include_hash
);
21536 do_cleanups (cleanup
);
21539 /* Check if the attribute's form is a DW_FORM_block*
21540 if so return true else false. */
21543 attr_form_is_block (const struct attribute
*attr
)
21545 return (attr
== NULL
? 0 :
21546 attr
->form
== DW_FORM_block1
21547 || attr
->form
== DW_FORM_block2
21548 || attr
->form
== DW_FORM_block4
21549 || attr
->form
== DW_FORM_block
21550 || attr
->form
== DW_FORM_exprloc
);
21553 /* Return non-zero if ATTR's value is a section offset --- classes
21554 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21555 You may use DW_UNSND (attr) to retrieve such offsets.
21557 Section 7.5.4, "Attribute Encodings", explains that no attribute
21558 may have a value that belongs to more than one of these classes; it
21559 would be ambiguous if we did, because we use the same forms for all
21563 attr_form_is_section_offset (const struct attribute
*attr
)
21565 return (attr
->form
== DW_FORM_data4
21566 || attr
->form
== DW_FORM_data8
21567 || attr
->form
== DW_FORM_sec_offset
);
21570 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21571 zero otherwise. When this function returns true, you can apply
21572 dwarf2_get_attr_constant_value to it.
21574 However, note that for some attributes you must check
21575 attr_form_is_section_offset before using this test. DW_FORM_data4
21576 and DW_FORM_data8 are members of both the constant class, and of
21577 the classes that contain offsets into other debug sections
21578 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21579 that, if an attribute's can be either a constant or one of the
21580 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21581 taken as section offsets, not constants. */
21584 attr_form_is_constant (const struct attribute
*attr
)
21586 switch (attr
->form
)
21588 case DW_FORM_sdata
:
21589 case DW_FORM_udata
:
21590 case DW_FORM_data1
:
21591 case DW_FORM_data2
:
21592 case DW_FORM_data4
:
21593 case DW_FORM_data8
:
21601 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21602 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21605 attr_form_is_ref (const struct attribute
*attr
)
21607 switch (attr
->form
)
21609 case DW_FORM_ref_addr
:
21614 case DW_FORM_ref_udata
:
21615 case DW_FORM_GNU_ref_alt
:
21622 /* Return the .debug_loc section to use for CU.
21623 For DWO files use .debug_loc.dwo. */
21625 static struct dwarf2_section_info
*
21626 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21629 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21630 return &dwarf2_per_objfile
->loc
;
21633 /* A helper function that fills in a dwarf2_loclist_baton. */
21636 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21637 struct dwarf2_loclist_baton
*baton
,
21638 const struct attribute
*attr
)
21640 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21642 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21644 baton
->per_cu
= cu
->per_cu
;
21645 gdb_assert (baton
->per_cu
);
21646 /* We don't know how long the location list is, but make sure we
21647 don't run off the edge of the section. */
21648 baton
->size
= section
->size
- DW_UNSND (attr
);
21649 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21650 baton
->base_address
= cu
->base_address
;
21651 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21655 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21656 struct dwarf2_cu
*cu
, int is_block
)
21658 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21659 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21661 if (attr_form_is_section_offset (attr
)
21662 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21663 the section. If so, fall through to the complaint in the
21665 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21667 struct dwarf2_loclist_baton
*baton
;
21669 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21670 sizeof (struct dwarf2_loclist_baton
));
21672 fill_in_loclist_baton (cu
, baton
, attr
);
21674 if (cu
->base_known
== 0)
21675 complaint (&symfile_complaints
,
21676 _("Location list used without "
21677 "specifying the CU base address."));
21679 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21680 ? dwarf2_loclist_block_index
21681 : dwarf2_loclist_index
);
21682 SYMBOL_LOCATION_BATON (sym
) = baton
;
21686 struct dwarf2_locexpr_baton
*baton
;
21688 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21689 sizeof (struct dwarf2_locexpr_baton
));
21690 baton
->per_cu
= cu
->per_cu
;
21691 gdb_assert (baton
->per_cu
);
21693 if (attr_form_is_block (attr
))
21695 /* Note that we're just copying the block's data pointer
21696 here, not the actual data. We're still pointing into the
21697 info_buffer for SYM's objfile; right now we never release
21698 that buffer, but when we do clean up properly this may
21700 baton
->size
= DW_BLOCK (attr
)->size
;
21701 baton
->data
= DW_BLOCK (attr
)->data
;
21705 dwarf2_invalid_attrib_class_complaint ("location description",
21706 SYMBOL_NATURAL_NAME (sym
));
21710 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21711 ? dwarf2_locexpr_block_index
21712 : dwarf2_locexpr_index
);
21713 SYMBOL_LOCATION_BATON (sym
) = baton
;
21717 /* Return the OBJFILE associated with the compilation unit CU. If CU
21718 came from a separate debuginfo file, then the master objfile is
21722 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21724 struct objfile
*objfile
= per_cu
->objfile
;
21726 /* Return the master objfile, so that we can report and look up the
21727 correct file containing this variable. */
21728 if (objfile
->separate_debug_objfile_backlink
)
21729 objfile
= objfile
->separate_debug_objfile_backlink
;
21734 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21735 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21736 CU_HEADERP first. */
21738 static const struct comp_unit_head
*
21739 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
21740 struct dwarf2_per_cu_data
*per_cu
)
21742 const gdb_byte
*info_ptr
;
21745 return &per_cu
->cu
->header
;
21747 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
21749 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
21750 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
21755 /* Return the address size given in the compilation unit header for CU. */
21758 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21760 struct comp_unit_head cu_header_local
;
21761 const struct comp_unit_head
*cu_headerp
;
21763 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21765 return cu_headerp
->addr_size
;
21768 /* Return the offset size given in the compilation unit header for CU. */
21771 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
21773 struct comp_unit_head cu_header_local
;
21774 const struct comp_unit_head
*cu_headerp
;
21776 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21778 return cu_headerp
->offset_size
;
21781 /* See its dwarf2loc.h declaration. */
21784 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21786 struct comp_unit_head cu_header_local
;
21787 const struct comp_unit_head
*cu_headerp
;
21789 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21791 if (cu_headerp
->version
== 2)
21792 return cu_headerp
->addr_size
;
21794 return cu_headerp
->offset_size
;
21797 /* Return the text offset of the CU. The returned offset comes from
21798 this CU's objfile. If this objfile came from a separate debuginfo
21799 file, then the offset may be different from the corresponding
21800 offset in the parent objfile. */
21803 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
21805 struct objfile
*objfile
= per_cu
->objfile
;
21807 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21810 /* Locate the .debug_info compilation unit from CU's objfile which contains
21811 the DIE at OFFSET. Raises an error on failure. */
21813 static struct dwarf2_per_cu_data
*
21814 dwarf2_find_containing_comp_unit (sect_offset offset
,
21815 unsigned int offset_in_dwz
,
21816 struct objfile
*objfile
)
21818 struct dwarf2_per_cu_data
*this_cu
;
21820 const sect_offset
*cu_off
;
21823 high
= dwarf2_per_objfile
->n_comp_units
- 1;
21826 struct dwarf2_per_cu_data
*mid_cu
;
21827 int mid
= low
+ (high
- low
) / 2;
21829 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
21830 cu_off
= &mid_cu
->offset
;
21831 if (mid_cu
->is_dwz
> offset_in_dwz
21832 || (mid_cu
->is_dwz
== offset_in_dwz
21833 && cu_off
->sect_off
>= offset
.sect_off
))
21838 gdb_assert (low
== high
);
21839 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
21840 cu_off
= &this_cu
->offset
;
21841 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
21843 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
21844 error (_("Dwarf Error: could not find partial DIE containing "
21845 "offset 0x%lx [in module %s]"),
21846 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
21848 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
21849 <= offset
.sect_off
);
21850 return dwarf2_per_objfile
->all_comp_units
[low
-1];
21854 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
21855 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
21856 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
21857 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
21858 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
21863 /* Initialize dwarf2_cu CU, owned by PER_CU. */
21866 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
21868 memset (cu
, 0, sizeof (*cu
));
21870 cu
->per_cu
= per_cu
;
21871 cu
->objfile
= per_cu
->objfile
;
21872 obstack_init (&cu
->comp_unit_obstack
);
21875 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
21878 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
21879 enum language pretend_language
)
21881 struct attribute
*attr
;
21883 /* Set the language we're debugging. */
21884 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
21886 set_cu_language (DW_UNSND (attr
), cu
);
21889 cu
->language
= pretend_language
;
21890 cu
->language_defn
= language_def (cu
->language
);
21893 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
21895 cu
->producer
= DW_STRING (attr
);
21898 /* Release one cached compilation unit, CU. We unlink it from the tree
21899 of compilation units, but we don't remove it from the read_in_chain;
21900 the caller is responsible for that.
21901 NOTE: DATA is a void * because this function is also used as a
21902 cleanup routine. */
21905 free_heap_comp_unit (void *data
)
21907 struct dwarf2_cu
*cu
= data
;
21909 gdb_assert (cu
->per_cu
!= NULL
);
21910 cu
->per_cu
->cu
= NULL
;
21913 obstack_free (&cu
->comp_unit_obstack
, NULL
);
21918 /* This cleanup function is passed the address of a dwarf2_cu on the stack
21919 when we're finished with it. We can't free the pointer itself, but be
21920 sure to unlink it from the cache. Also release any associated storage. */
21923 free_stack_comp_unit (void *data
)
21925 struct dwarf2_cu
*cu
= data
;
21927 gdb_assert (cu
->per_cu
!= NULL
);
21928 cu
->per_cu
->cu
= NULL
;
21931 obstack_free (&cu
->comp_unit_obstack
, NULL
);
21932 cu
->partial_dies
= NULL
;
21935 /* Free all cached compilation units. */
21938 free_cached_comp_units (void *data
)
21940 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21942 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21943 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21944 while (per_cu
!= NULL
)
21946 struct dwarf2_per_cu_data
*next_cu
;
21948 next_cu
= per_cu
->cu
->read_in_chain
;
21950 free_heap_comp_unit (per_cu
->cu
);
21951 *last_chain
= next_cu
;
21957 /* Increase the age counter on each cached compilation unit, and free
21958 any that are too old. */
21961 age_cached_comp_units (void)
21963 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21965 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
21966 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21967 while (per_cu
!= NULL
)
21969 per_cu
->cu
->last_used
++;
21970 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
21971 dwarf2_mark (per_cu
->cu
);
21972 per_cu
= per_cu
->cu
->read_in_chain
;
21975 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21976 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21977 while (per_cu
!= NULL
)
21979 struct dwarf2_per_cu_data
*next_cu
;
21981 next_cu
= per_cu
->cu
->read_in_chain
;
21983 if (!per_cu
->cu
->mark
)
21985 free_heap_comp_unit (per_cu
->cu
);
21986 *last_chain
= next_cu
;
21989 last_chain
= &per_cu
->cu
->read_in_chain
;
21995 /* Remove a single compilation unit from the cache. */
21998 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
22000 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22002 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22003 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22004 while (per_cu
!= NULL
)
22006 struct dwarf2_per_cu_data
*next_cu
;
22008 next_cu
= per_cu
->cu
->read_in_chain
;
22010 if (per_cu
== target_per_cu
)
22012 free_heap_comp_unit (per_cu
->cu
);
22014 *last_chain
= next_cu
;
22018 last_chain
= &per_cu
->cu
->read_in_chain
;
22024 /* Release all extra memory associated with OBJFILE. */
22027 dwarf2_free_objfile (struct objfile
*objfile
)
22029 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
22031 if (dwarf2_per_objfile
== NULL
)
22034 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
22035 free_cached_comp_units (NULL
);
22037 if (dwarf2_per_objfile
->quick_file_names_table
)
22038 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
22040 if (dwarf2_per_objfile
->line_header_hash
)
22041 htab_delete (dwarf2_per_objfile
->line_header_hash
);
22043 /* Everything else should be on the objfile obstack. */
22046 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
22047 We store these in a hash table separate from the DIEs, and preserve them
22048 when the DIEs are flushed out of cache.
22050 The CU "per_cu" pointer is needed because offset alone is not enough to
22051 uniquely identify the type. A file may have multiple .debug_types sections,
22052 or the type may come from a DWO file. Furthermore, while it's more logical
22053 to use per_cu->section+offset, with Fission the section with the data is in
22054 the DWO file but we don't know that section at the point we need it.
22055 We have to use something in dwarf2_per_cu_data (or the pointer to it)
22056 because we can enter the lookup routine, get_die_type_at_offset, from
22057 outside this file, and thus won't necessarily have PER_CU->cu.
22058 Fortunately, PER_CU is stable for the life of the objfile. */
22060 struct dwarf2_per_cu_offset_and_type
22062 const struct dwarf2_per_cu_data
*per_cu
;
22063 sect_offset offset
;
22067 /* Hash function for a dwarf2_per_cu_offset_and_type. */
22070 per_cu_offset_and_type_hash (const void *item
)
22072 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
22074 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
22077 /* Equality function for a dwarf2_per_cu_offset_and_type. */
22080 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
22082 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
22083 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
22085 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
22086 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
22089 /* Set the type associated with DIE to TYPE. Save it in CU's hash
22090 table if necessary. For convenience, return TYPE.
22092 The DIEs reading must have careful ordering to:
22093 * Not cause infite loops trying to read in DIEs as a prerequisite for
22094 reading current DIE.
22095 * Not trying to dereference contents of still incompletely read in types
22096 while reading in other DIEs.
22097 * Enable referencing still incompletely read in types just by a pointer to
22098 the type without accessing its fields.
22100 Therefore caller should follow these rules:
22101 * Try to fetch any prerequisite types we may need to build this DIE type
22102 before building the type and calling set_die_type.
22103 * After building type call set_die_type for current DIE as soon as
22104 possible before fetching more types to complete the current type.
22105 * Make the type as complete as possible before fetching more types. */
22107 static struct type
*
22108 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
22110 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
22111 struct objfile
*objfile
= cu
->objfile
;
22112 struct attribute
*attr
;
22113 struct dynamic_prop prop
;
22115 /* For Ada types, make sure that the gnat-specific data is always
22116 initialized (if not already set). There are a few types where
22117 we should not be doing so, because the type-specific area is
22118 already used to hold some other piece of info (eg: TYPE_CODE_FLT
22119 where the type-specific area is used to store the floatformat).
22120 But this is not a problem, because the gnat-specific information
22121 is actually not needed for these types. */
22122 if (need_gnat_info (cu
)
22123 && TYPE_CODE (type
) != TYPE_CODE_FUNC
22124 && TYPE_CODE (type
) != TYPE_CODE_FLT
22125 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
22126 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
22127 && TYPE_CODE (type
) != TYPE_CODE_METHOD
22128 && !HAVE_GNAT_AUX_INFO (type
))
22129 INIT_GNAT_SPECIFIC (type
);
22131 /* Read DW_AT_data_location and set in type. */
22132 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
22133 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22134 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
22136 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22138 dwarf2_per_objfile
->die_type_hash
=
22139 htab_create_alloc_ex (127,
22140 per_cu_offset_and_type_hash
,
22141 per_cu_offset_and_type_eq
,
22143 &objfile
->objfile_obstack
,
22144 hashtab_obstack_allocate
,
22145 dummy_obstack_deallocate
);
22148 ofs
.per_cu
= cu
->per_cu
;
22149 ofs
.offset
= die
->offset
;
22151 slot
= (struct dwarf2_per_cu_offset_and_type
**)
22152 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
22154 complaint (&symfile_complaints
,
22155 _("A problem internal to GDB: DIE 0x%x has type already set"),
22156 die
->offset
.sect_off
);
22157 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
22162 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
22163 or return NULL if the die does not have a saved type. */
22165 static struct type
*
22166 get_die_type_at_offset (sect_offset offset
,
22167 struct dwarf2_per_cu_data
*per_cu
)
22169 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
22171 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22174 ofs
.per_cu
= per_cu
;
22175 ofs
.offset
= offset
;
22176 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
22183 /* Look up the type for DIE in CU in die_type_hash,
22184 or return NULL if DIE does not have a saved type. */
22186 static struct type
*
22187 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22189 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
22192 /* Add a dependence relationship from CU to REF_PER_CU. */
22195 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
22196 struct dwarf2_per_cu_data
*ref_per_cu
)
22200 if (cu
->dependencies
== NULL
)
22202 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
22203 NULL
, &cu
->comp_unit_obstack
,
22204 hashtab_obstack_allocate
,
22205 dummy_obstack_deallocate
);
22207 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
22209 *slot
= ref_per_cu
;
22212 /* Subroutine of dwarf2_mark to pass to htab_traverse.
22213 Set the mark field in every compilation unit in the
22214 cache that we must keep because we are keeping CU. */
22217 dwarf2_mark_helper (void **slot
, void *data
)
22219 struct dwarf2_per_cu_data
*per_cu
;
22221 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
22223 /* cu->dependencies references may not yet have been ever read if QUIT aborts
22224 reading of the chain. As such dependencies remain valid it is not much
22225 useful to track and undo them during QUIT cleanups. */
22226 if (per_cu
->cu
== NULL
)
22229 if (per_cu
->cu
->mark
)
22231 per_cu
->cu
->mark
= 1;
22233 if (per_cu
->cu
->dependencies
!= NULL
)
22234 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22239 /* Set the mark field in CU and in every other compilation unit in the
22240 cache that we must keep because we are keeping CU. */
22243 dwarf2_mark (struct dwarf2_cu
*cu
)
22248 if (cu
->dependencies
!= NULL
)
22249 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22253 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
22257 per_cu
->cu
->mark
= 0;
22258 per_cu
= per_cu
->cu
->read_in_chain
;
22262 /* Trivial hash function for partial_die_info: the hash value of a DIE
22263 is its offset in .debug_info for this objfile. */
22266 partial_die_hash (const void *item
)
22268 const struct partial_die_info
*part_die
= item
;
22270 return part_die
->offset
.sect_off
;
22273 /* Trivial comparison function for partial_die_info structures: two DIEs
22274 are equal if they have the same offset. */
22277 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
22279 const struct partial_die_info
*part_die_lhs
= item_lhs
;
22280 const struct partial_die_info
*part_die_rhs
= item_rhs
;
22282 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
22285 static struct cmd_list_element
*set_dwarf2_cmdlist
;
22286 static struct cmd_list_element
*show_dwarf2_cmdlist
;
22289 set_dwarf2_cmd (char *args
, int from_tty
)
22291 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", all_commands
,
22296 show_dwarf2_cmd (char *args
, int from_tty
)
22298 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
22301 /* Free data associated with OBJFILE, if necessary. */
22304 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
22306 struct dwarf2_per_objfile
*data
= d
;
22309 /* Make sure we don't accidentally use dwarf2_per_objfile while
22311 dwarf2_per_objfile
= NULL
;
22313 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
22314 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
22316 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
22317 VEC_free (dwarf2_per_cu_ptr
,
22318 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
22319 xfree (data
->all_type_units
);
22321 VEC_free (dwarf2_section_info_def
, data
->types
);
22323 if (data
->dwo_files
)
22324 free_dwo_files (data
->dwo_files
, objfile
);
22325 if (data
->dwp_file
)
22326 gdb_bfd_unref (data
->dwp_file
->dbfd
);
22328 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
22329 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
22333 /* The "save gdb-index" command. */
22335 /* The contents of the hash table we create when building the string
22337 struct strtab_entry
22339 offset_type offset
;
22343 /* Hash function for a strtab_entry.
22345 Function is used only during write_hash_table so no index format backward
22346 compatibility is needed. */
22349 hash_strtab_entry (const void *e
)
22351 const struct strtab_entry
*entry
= e
;
22352 return mapped_index_string_hash (INT_MAX
, entry
->str
);
22355 /* Equality function for a strtab_entry. */
22358 eq_strtab_entry (const void *a
, const void *b
)
22360 const struct strtab_entry
*ea
= a
;
22361 const struct strtab_entry
*eb
= b
;
22362 return !strcmp (ea
->str
, eb
->str
);
22365 /* Create a strtab_entry hash table. */
22368 create_strtab (void)
22370 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
22371 xfree
, xcalloc
, xfree
);
22374 /* Add a string to the constant pool. Return the string's offset in
22378 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
22381 struct strtab_entry entry
;
22382 struct strtab_entry
*result
;
22385 slot
= htab_find_slot (table
, &entry
, INSERT
);
22390 result
= XNEW (struct strtab_entry
);
22391 result
->offset
= obstack_object_size (cpool
);
22393 obstack_grow_str0 (cpool
, str
);
22396 return result
->offset
;
22399 /* An entry in the symbol table. */
22400 struct symtab_index_entry
22402 /* The name of the symbol. */
22404 /* The offset of the name in the constant pool. */
22405 offset_type index_offset
;
22406 /* A sorted vector of the indices of all the CUs that hold an object
22408 VEC (offset_type
) *cu_indices
;
22411 /* The symbol table. This is a power-of-2-sized hash table. */
22412 struct mapped_symtab
22414 offset_type n_elements
;
22416 struct symtab_index_entry
**data
;
22419 /* Hash function for a symtab_index_entry. */
22422 hash_symtab_entry (const void *e
)
22424 const struct symtab_index_entry
*entry
= e
;
22425 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
22426 sizeof (offset_type
) * VEC_length (offset_type
,
22427 entry
->cu_indices
),
22431 /* Equality function for a symtab_index_entry. */
22434 eq_symtab_entry (const void *a
, const void *b
)
22436 const struct symtab_index_entry
*ea
= a
;
22437 const struct symtab_index_entry
*eb
= b
;
22438 int len
= VEC_length (offset_type
, ea
->cu_indices
);
22439 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
22441 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
22442 VEC_address (offset_type
, eb
->cu_indices
),
22443 sizeof (offset_type
) * len
);
22446 /* Destroy a symtab_index_entry. */
22449 delete_symtab_entry (void *p
)
22451 struct symtab_index_entry
*entry
= p
;
22452 VEC_free (offset_type
, entry
->cu_indices
);
22456 /* Create a hash table holding symtab_index_entry objects. */
22459 create_symbol_hash_table (void)
22461 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
22462 delete_symtab_entry
, xcalloc
, xfree
);
22465 /* Create a new mapped symtab object. */
22467 static struct mapped_symtab
*
22468 create_mapped_symtab (void)
22470 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
22471 symtab
->n_elements
= 0;
22472 symtab
->size
= 1024;
22473 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22477 /* Destroy a mapped_symtab. */
22480 cleanup_mapped_symtab (void *p
)
22482 struct mapped_symtab
*symtab
= p
;
22483 /* The contents of the array are freed when the other hash table is
22485 xfree (symtab
->data
);
22489 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
22492 Function is used only during write_hash_table so no index format backward
22493 compatibility is needed. */
22495 static struct symtab_index_entry
**
22496 find_slot (struct mapped_symtab
*symtab
, const char *name
)
22498 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
22500 index
= hash
& (symtab
->size
- 1);
22501 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
22505 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
22506 return &symtab
->data
[index
];
22507 index
= (index
+ step
) & (symtab
->size
- 1);
22511 /* Expand SYMTAB's hash table. */
22514 hash_expand (struct mapped_symtab
*symtab
)
22516 offset_type old_size
= symtab
->size
;
22518 struct symtab_index_entry
**old_entries
= symtab
->data
;
22521 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22523 for (i
= 0; i
< old_size
; ++i
)
22525 if (old_entries
[i
])
22527 struct symtab_index_entry
**slot
= find_slot (symtab
,
22528 old_entries
[i
]->name
);
22529 *slot
= old_entries
[i
];
22533 xfree (old_entries
);
22536 /* Add an entry to SYMTAB. NAME is the name of the symbol.
22537 CU_INDEX is the index of the CU in which the symbol appears.
22538 IS_STATIC is one if the symbol is static, otherwise zero (global). */
22541 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
22542 int is_static
, gdb_index_symbol_kind kind
,
22543 offset_type cu_index
)
22545 struct symtab_index_entry
**slot
;
22546 offset_type cu_index_and_attrs
;
22548 ++symtab
->n_elements
;
22549 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
22550 hash_expand (symtab
);
22552 slot
= find_slot (symtab
, name
);
22555 *slot
= XNEW (struct symtab_index_entry
);
22556 (*slot
)->name
= name
;
22557 /* index_offset is set later. */
22558 (*slot
)->cu_indices
= NULL
;
22561 cu_index_and_attrs
= 0;
22562 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
22563 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
22564 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
22566 /* We don't want to record an index value twice as we want to avoid the
22568 We process all global symbols and then all static symbols
22569 (which would allow us to avoid the duplication by only having to check
22570 the last entry pushed), but a symbol could have multiple kinds in one CU.
22571 To keep things simple we don't worry about the duplication here and
22572 sort and uniqufy the list after we've processed all symbols. */
22573 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
22576 /* qsort helper routine for uniquify_cu_indices. */
22579 offset_type_compare (const void *ap
, const void *bp
)
22581 offset_type a
= *(offset_type
*) ap
;
22582 offset_type b
= *(offset_type
*) bp
;
22584 return (a
> b
) - (b
> a
);
22587 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22590 uniquify_cu_indices (struct mapped_symtab
*symtab
)
22594 for (i
= 0; i
< symtab
->size
; ++i
)
22596 struct symtab_index_entry
*entry
= symtab
->data
[i
];
22599 && entry
->cu_indices
!= NULL
)
22601 unsigned int next_to_insert
, next_to_check
;
22602 offset_type last_value
;
22604 qsort (VEC_address (offset_type
, entry
->cu_indices
),
22605 VEC_length (offset_type
, entry
->cu_indices
),
22606 sizeof (offset_type
), offset_type_compare
);
22608 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
22609 next_to_insert
= 1;
22610 for (next_to_check
= 1;
22611 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
22614 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
22617 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
22619 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22624 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22629 /* Add a vector of indices to the constant pool. */
22632 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22633 struct symtab_index_entry
*entry
)
22637 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22640 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22641 offset_type val
= MAYBE_SWAP (len
);
22646 entry
->index_offset
= obstack_object_size (cpool
);
22648 obstack_grow (cpool
, &val
, sizeof (val
));
22650 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22653 val
= MAYBE_SWAP (iter
);
22654 obstack_grow (cpool
, &val
, sizeof (val
));
22659 struct symtab_index_entry
*old_entry
= *slot
;
22660 entry
->index_offset
= old_entry
->index_offset
;
22663 return entry
->index_offset
;
22666 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22667 constant pool entries going into the obstack CPOOL. */
22670 write_hash_table (struct mapped_symtab
*symtab
,
22671 struct obstack
*output
, struct obstack
*cpool
)
22674 htab_t symbol_hash_table
;
22677 symbol_hash_table
= create_symbol_hash_table ();
22678 str_table
= create_strtab ();
22680 /* We add all the index vectors to the constant pool first, to
22681 ensure alignment is ok. */
22682 for (i
= 0; i
< symtab
->size
; ++i
)
22684 if (symtab
->data
[i
])
22685 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
22688 /* Now write out the hash table. */
22689 for (i
= 0; i
< symtab
->size
; ++i
)
22691 offset_type str_off
, vec_off
;
22693 if (symtab
->data
[i
])
22695 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
22696 vec_off
= symtab
->data
[i
]->index_offset
;
22700 /* While 0 is a valid constant pool index, it is not valid
22701 to have 0 for both offsets. */
22706 str_off
= MAYBE_SWAP (str_off
);
22707 vec_off
= MAYBE_SWAP (vec_off
);
22709 obstack_grow (output
, &str_off
, sizeof (str_off
));
22710 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
22713 htab_delete (str_table
);
22714 htab_delete (symbol_hash_table
);
22717 /* Struct to map psymtab to CU index in the index file. */
22718 struct psymtab_cu_index_map
22720 struct partial_symtab
*psymtab
;
22721 unsigned int cu_index
;
22725 hash_psymtab_cu_index (const void *item
)
22727 const struct psymtab_cu_index_map
*map
= item
;
22729 return htab_hash_pointer (map
->psymtab
);
22733 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
22735 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
22736 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
22738 return lhs
->psymtab
== rhs
->psymtab
;
22741 /* Helper struct for building the address table. */
22742 struct addrmap_index_data
22744 struct objfile
*objfile
;
22745 struct obstack
*addr_obstack
;
22746 htab_t cu_index_htab
;
22748 /* Non-zero if the previous_* fields are valid.
22749 We can't write an entry until we see the next entry (since it is only then
22750 that we know the end of the entry). */
22751 int previous_valid
;
22752 /* Index of the CU in the table of all CUs in the index file. */
22753 unsigned int previous_cu_index
;
22754 /* Start address of the CU. */
22755 CORE_ADDR previous_cu_start
;
22758 /* Write an address entry to OBSTACK. */
22761 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
22762 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
22764 offset_type cu_index_to_write
;
22766 CORE_ADDR baseaddr
;
22768 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22770 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
22771 obstack_grow (obstack
, addr
, 8);
22772 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
22773 obstack_grow (obstack
, addr
, 8);
22774 cu_index_to_write
= MAYBE_SWAP (cu_index
);
22775 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
22778 /* Worker function for traversing an addrmap to build the address table. */
22781 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
22783 struct addrmap_index_data
*data
= datap
;
22784 struct partial_symtab
*pst
= obj
;
22786 if (data
->previous_valid
)
22787 add_address_entry (data
->objfile
, data
->addr_obstack
,
22788 data
->previous_cu_start
, start_addr
,
22789 data
->previous_cu_index
);
22791 data
->previous_cu_start
= start_addr
;
22794 struct psymtab_cu_index_map find_map
, *map
;
22795 find_map
.psymtab
= pst
;
22796 map
= htab_find (data
->cu_index_htab
, &find_map
);
22797 gdb_assert (map
!= NULL
);
22798 data
->previous_cu_index
= map
->cu_index
;
22799 data
->previous_valid
= 1;
22802 data
->previous_valid
= 0;
22807 /* Write OBJFILE's address map to OBSTACK.
22808 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
22809 in the index file. */
22812 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
22813 htab_t cu_index_htab
)
22815 struct addrmap_index_data addrmap_index_data
;
22817 /* When writing the address table, we have to cope with the fact that
22818 the addrmap iterator only provides the start of a region; we have to
22819 wait until the next invocation to get the start of the next region. */
22821 addrmap_index_data
.objfile
= objfile
;
22822 addrmap_index_data
.addr_obstack
= obstack
;
22823 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
22824 addrmap_index_data
.previous_valid
= 0;
22826 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
22827 &addrmap_index_data
);
22829 /* It's highly unlikely the last entry (end address = 0xff...ff)
22830 is valid, but we should still handle it.
22831 The end address is recorded as the start of the next region, but that
22832 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
22834 if (addrmap_index_data
.previous_valid
)
22835 add_address_entry (objfile
, obstack
,
22836 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
22837 addrmap_index_data
.previous_cu_index
);
22840 /* Return the symbol kind of PSYM. */
22842 static gdb_index_symbol_kind
22843 symbol_kind (struct partial_symbol
*psym
)
22845 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
22846 enum address_class aclass
= PSYMBOL_CLASS (psym
);
22854 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
22856 return GDB_INDEX_SYMBOL_KIND_TYPE
;
22858 case LOC_CONST_BYTES
:
22859 case LOC_OPTIMIZED_OUT
:
22861 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
22863 /* Note: It's currently impossible to recognize psyms as enum values
22864 short of reading the type info. For now punt. */
22865 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
22867 /* There are other LOC_FOO values that one might want to classify
22868 as variables, but dwarf2read.c doesn't currently use them. */
22869 return GDB_INDEX_SYMBOL_KIND_OTHER
;
22871 case STRUCT_DOMAIN
:
22872 return GDB_INDEX_SYMBOL_KIND_TYPE
;
22874 return GDB_INDEX_SYMBOL_KIND_OTHER
;
22878 /* Add a list of partial symbols to SYMTAB. */
22881 write_psymbols (struct mapped_symtab
*symtab
,
22883 struct partial_symbol
**psymp
,
22885 offset_type cu_index
,
22888 for (; count
-- > 0; ++psymp
)
22890 struct partial_symbol
*psym
= *psymp
;
22893 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
22894 error (_("Ada is not currently supported by the index"));
22896 /* Only add a given psymbol once. */
22897 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
22900 gdb_index_symbol_kind kind
= symbol_kind (psym
);
22903 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
22904 is_static
, kind
, cu_index
);
22909 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
22910 exception if there is an error. */
22913 write_obstack (FILE *file
, struct obstack
*obstack
)
22915 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
22917 != obstack_object_size (obstack
))
22918 error (_("couldn't data write to file"));
22921 /* Unlink a file if the argument is not NULL. */
22924 unlink_if_set (void *p
)
22926 char **filename
= p
;
22928 unlink (*filename
);
22931 /* A helper struct used when iterating over debug_types. */
22932 struct signatured_type_index_data
22934 struct objfile
*objfile
;
22935 struct mapped_symtab
*symtab
;
22936 struct obstack
*types_list
;
22941 /* A helper function that writes a single signatured_type to an
22945 write_one_signatured_type (void **slot
, void *d
)
22947 struct signatured_type_index_data
*info
= d
;
22948 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
22949 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
22952 write_psymbols (info
->symtab
,
22954 info
->objfile
->global_psymbols
.list
22955 + psymtab
->globals_offset
,
22956 psymtab
->n_global_syms
, info
->cu_index
,
22958 write_psymbols (info
->symtab
,
22960 info
->objfile
->static_psymbols
.list
22961 + psymtab
->statics_offset
,
22962 psymtab
->n_static_syms
, info
->cu_index
,
22965 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
22966 entry
->per_cu
.offset
.sect_off
);
22967 obstack_grow (info
->types_list
, val
, 8);
22968 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
22969 entry
->type_offset_in_tu
.cu_off
);
22970 obstack_grow (info
->types_list
, val
, 8);
22971 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
22972 obstack_grow (info
->types_list
, val
, 8);
22979 /* Recurse into all "included" dependencies and write their symbols as
22980 if they appeared in this psymtab. */
22983 recursively_write_psymbols (struct objfile
*objfile
,
22984 struct partial_symtab
*psymtab
,
22985 struct mapped_symtab
*symtab
,
22987 offset_type cu_index
)
22991 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
22992 if (psymtab
->dependencies
[i
]->user
!= NULL
)
22993 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
22994 symtab
, psyms_seen
, cu_index
);
22996 write_psymbols (symtab
,
22998 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
22999 psymtab
->n_global_syms
, cu_index
,
23001 write_psymbols (symtab
,
23003 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
23004 psymtab
->n_static_syms
, cu_index
,
23008 /* Create an index file for OBJFILE in the directory DIR. */
23011 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
23013 struct cleanup
*cleanup
;
23014 char *filename
, *cleanup_filename
;
23015 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
23016 struct obstack cu_list
, types_cu_list
;
23019 struct mapped_symtab
*symtab
;
23020 offset_type val
, size_of_contents
, total_len
;
23023 htab_t cu_index_htab
;
23024 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
23026 if (dwarf2_per_objfile
->using_index
)
23027 error (_("Cannot use an index to create the index"));
23029 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
23030 error (_("Cannot make an index when the file has multiple .debug_types sections"));
23032 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
23035 if (stat (objfile_name (objfile
), &st
) < 0)
23036 perror_with_name (objfile_name (objfile
));
23038 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
23039 INDEX_SUFFIX
, (char *) NULL
);
23040 cleanup
= make_cleanup (xfree
, filename
);
23042 out_file
= gdb_fopen_cloexec (filename
, "wb");
23044 error (_("Can't open `%s' for writing"), filename
);
23046 cleanup_filename
= filename
;
23047 make_cleanup (unlink_if_set
, &cleanup_filename
);
23049 symtab
= create_mapped_symtab ();
23050 make_cleanup (cleanup_mapped_symtab
, symtab
);
23052 obstack_init (&addr_obstack
);
23053 make_cleanup_obstack_free (&addr_obstack
);
23055 obstack_init (&cu_list
);
23056 make_cleanup_obstack_free (&cu_list
);
23058 obstack_init (&types_cu_list
);
23059 make_cleanup_obstack_free (&types_cu_list
);
23061 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
23062 NULL
, xcalloc
, xfree
);
23063 make_cleanup_htab_delete (psyms_seen
);
23065 /* While we're scanning CU's create a table that maps a psymtab pointer
23066 (which is what addrmap records) to its index (which is what is recorded
23067 in the index file). This will later be needed to write the address
23069 cu_index_htab
= htab_create_alloc (100,
23070 hash_psymtab_cu_index
,
23071 eq_psymtab_cu_index
,
23072 NULL
, xcalloc
, xfree
);
23073 make_cleanup_htab_delete (cu_index_htab
);
23074 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
23075 xmalloc (sizeof (struct psymtab_cu_index_map
)
23076 * dwarf2_per_objfile
->n_comp_units
);
23077 make_cleanup (xfree
, psymtab_cu_index_map
);
23079 /* The CU list is already sorted, so we don't need to do additional
23080 work here. Also, the debug_types entries do not appear in
23081 all_comp_units, but only in their own hash table. */
23082 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23084 struct dwarf2_per_cu_data
*per_cu
23085 = dwarf2_per_objfile
->all_comp_units
[i
];
23086 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23088 struct psymtab_cu_index_map
*map
;
23091 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23092 It may be referenced from a local scope but in such case it does not
23093 need to be present in .gdb_index. */
23094 if (psymtab
== NULL
)
23097 if (psymtab
->user
== NULL
)
23098 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
23100 map
= &psymtab_cu_index_map
[i
];
23101 map
->psymtab
= psymtab
;
23103 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
23104 gdb_assert (slot
!= NULL
);
23105 gdb_assert (*slot
== NULL
);
23108 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23109 per_cu
->offset
.sect_off
);
23110 obstack_grow (&cu_list
, val
, 8);
23111 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23112 obstack_grow (&cu_list
, val
, 8);
23115 /* Dump the address map. */
23116 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
23118 /* Write out the .debug_type entries, if any. */
23119 if (dwarf2_per_objfile
->signatured_types
)
23121 struct signatured_type_index_data sig_data
;
23123 sig_data
.objfile
= objfile
;
23124 sig_data
.symtab
= symtab
;
23125 sig_data
.types_list
= &types_cu_list
;
23126 sig_data
.psyms_seen
= psyms_seen
;
23127 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23128 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23129 write_one_signatured_type
, &sig_data
);
23132 /* Now that we've processed all symbols we can shrink their cu_indices
23134 uniquify_cu_indices (symtab
);
23136 obstack_init (&constant_pool
);
23137 make_cleanup_obstack_free (&constant_pool
);
23138 obstack_init (&symtab_obstack
);
23139 make_cleanup_obstack_free (&symtab_obstack
);
23140 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
23142 obstack_init (&contents
);
23143 make_cleanup_obstack_free (&contents
);
23144 size_of_contents
= 6 * sizeof (offset_type
);
23145 total_len
= size_of_contents
;
23147 /* The version number. */
23148 val
= MAYBE_SWAP (8);
23149 obstack_grow (&contents
, &val
, sizeof (val
));
23151 /* The offset of the CU list from the start of the file. */
23152 val
= MAYBE_SWAP (total_len
);
23153 obstack_grow (&contents
, &val
, sizeof (val
));
23154 total_len
+= obstack_object_size (&cu_list
);
23156 /* The offset of the types CU list from the start of the file. */
23157 val
= MAYBE_SWAP (total_len
);
23158 obstack_grow (&contents
, &val
, sizeof (val
));
23159 total_len
+= obstack_object_size (&types_cu_list
);
23161 /* The offset of the address table from the start of the file. */
23162 val
= MAYBE_SWAP (total_len
);
23163 obstack_grow (&contents
, &val
, sizeof (val
));
23164 total_len
+= obstack_object_size (&addr_obstack
);
23166 /* The offset of the symbol table from the start of the file. */
23167 val
= MAYBE_SWAP (total_len
);
23168 obstack_grow (&contents
, &val
, sizeof (val
));
23169 total_len
+= obstack_object_size (&symtab_obstack
);
23171 /* The offset of the constant pool from the start of the file. */
23172 val
= MAYBE_SWAP (total_len
);
23173 obstack_grow (&contents
, &val
, sizeof (val
));
23174 total_len
+= obstack_object_size (&constant_pool
);
23176 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
23178 write_obstack (out_file
, &contents
);
23179 write_obstack (out_file
, &cu_list
);
23180 write_obstack (out_file
, &types_cu_list
);
23181 write_obstack (out_file
, &addr_obstack
);
23182 write_obstack (out_file
, &symtab_obstack
);
23183 write_obstack (out_file
, &constant_pool
);
23187 /* We want to keep the file, so we set cleanup_filename to NULL
23188 here. See unlink_if_set. */
23189 cleanup_filename
= NULL
;
23191 do_cleanups (cleanup
);
23194 /* Implementation of the `save gdb-index' command.
23196 Note that the file format used by this command is documented in the
23197 GDB manual. Any changes here must be documented there. */
23200 save_gdb_index_command (char *arg
, int from_tty
)
23202 struct objfile
*objfile
;
23205 error (_("usage: save gdb-index DIRECTORY"));
23207 ALL_OBJFILES (objfile
)
23211 /* If the objfile does not correspond to an actual file, skip it. */
23212 if (stat (objfile_name (objfile
), &st
) < 0)
23215 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
23216 if (dwarf2_per_objfile
)
23221 write_psymtabs_to_index (objfile
, arg
);
23223 CATCH (except
, RETURN_MASK_ERROR
)
23225 exception_fprintf (gdb_stderr
, except
,
23226 _("Error while writing index for `%s': "),
23227 objfile_name (objfile
));
23236 int dwarf2_always_disassemble
;
23239 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
23240 struct cmd_list_element
*c
, const char *value
)
23242 fprintf_filtered (file
,
23243 _("Whether to always disassemble "
23244 "DWARF expressions is %s.\n"),
23249 show_check_physname (struct ui_file
*file
, int from_tty
,
23250 struct cmd_list_element
*c
, const char *value
)
23252 fprintf_filtered (file
,
23253 _("Whether to check \"physname\" is %s.\n"),
23257 void _initialize_dwarf2_read (void);
23260 _initialize_dwarf2_read (void)
23262 struct cmd_list_element
*c
;
23264 dwarf2_objfile_data_key
23265 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
23267 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
23268 Set DWARF 2 specific variables.\n\
23269 Configure DWARF 2 variables such as the cache size"),
23270 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
23271 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23273 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
23274 Show DWARF 2 specific variables\n\
23275 Show DWARF 2 variables such as the cache size"),
23276 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
23277 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23279 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23280 &dwarf2_max_cache_age
, _("\
23281 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
23282 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
23283 A higher limit means that cached compilation units will be stored\n\
23284 in memory longer, and more total memory will be used. Zero disables\n\
23285 caching, which can slow down startup."),
23287 show_dwarf2_max_cache_age
,
23288 &set_dwarf2_cmdlist
,
23289 &show_dwarf2_cmdlist
);
23291 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
23292 &dwarf2_always_disassemble
, _("\
23293 Set whether `info address' always disassembles DWARF expressions."), _("\
23294 Show whether `info address' always disassembles DWARF expressions."), _("\
23295 When enabled, DWARF expressions are always printed in an assembly-like\n\
23296 syntax. When disabled, expressions will be printed in a more\n\
23297 conversational style, when possible."),
23299 show_dwarf2_always_disassemble
,
23300 &set_dwarf2_cmdlist
,
23301 &show_dwarf2_cmdlist
);
23303 add_setshow_zuinteger_cmd ("dwarf2-read", no_class
, &dwarf2_read_debug
, _("\
23304 Set debugging of the dwarf2 reader."), _("\
23305 Show debugging of the dwarf2 reader."), _("\
23306 When enabled (non-zero), debugging messages are printed during dwarf2\n\
23307 reading and symtab expansion. A value of 1 (one) provides basic\n\
23308 information. A value greater than 1 provides more verbose information."),
23311 &setdebuglist
, &showdebuglist
);
23313 add_setshow_zuinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
23314 Set debugging of the dwarf2 DIE reader."), _("\
23315 Show debugging of the dwarf2 DIE reader."), _("\
23316 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23317 The value is the maximum depth to print."),
23320 &setdebuglist
, &showdebuglist
);
23322 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23323 Set cross-checking of \"physname\" code against demangler."), _("\
23324 Show cross-checking of \"physname\" code against demangler."), _("\
23325 When enabled, GDB's internal \"physname\" code is checked against\n\
23327 NULL
, show_check_physname
,
23328 &setdebuglist
, &showdebuglist
);
23330 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23331 no_class
, &use_deprecated_index_sections
, _("\
23332 Set whether to use deprecated gdb_index sections."), _("\
23333 Show whether to use deprecated gdb_index sections."), _("\
23334 When enabled, deprecated .gdb_index sections are used anyway.\n\
23335 Normally they are ignored either because of a missing feature or\n\
23336 performance issue.\n\
23337 Warning: This option must be enabled before gdb reads the file."),
23340 &setlist
, &showlist
);
23342 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
23344 Save a gdb-index file.\n\
23345 Usage: save gdb-index DIRECTORY"),
23347 set_cmd_completer (c
, filename_completer
);
23349 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23350 &dwarf2_locexpr_funcs
);
23351 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23352 &dwarf2_loclist_funcs
);
23354 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23355 &dwarf2_block_frame_base_locexpr_funcs
);
23356 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23357 &dwarf2_block_frame_base_loclist_funcs
);